Bearing press-fitting device

Abstract

The bearing press-fitting device comprises a base and a pressing sleeve, the base and the pressing sleeve are matched to be used for pressing and conveying a bearing arranged on a main shaft in a sleeving mode to a proper position of the main shaft, the base comprises a containing hole and a first contact face, the containing hole is used for containing one end of the main shaft, and the first contact face is used for being matched with the end face of the bearing. The first contact surface is vertically arranged relative to the containing hole, and the perpendicularity of the central axis of the containing hole and the first contact surface is set to be 0 (not included)-0.05 mm. The pressing sleeve comprises a guide hole and a second contact surface, the guide hole is used for containing the other end of the main shaft, the second contact surface is used for being matched with the other end face of the bearing, and the second contact surface is vertically arranged relative to the guide hole. The perpendicularity of the central axis of the guide hole and the second contact face is set to be 0 (not included)-0.05 mm. The bearing assembling and positioning device has the advantages that assembling and positioning are accurate through accurate positioning, the bearing is stressed in a balanced mode through accurate press-fit, the bearing precision is effectively protected, the assembling quality is stable, and the assembling efficiency is high.

Description

Technical Field

[0001] The present application relates to the technical field of tooling, and in particular to a press-fit bearing device. Background Art

[0002] At present, when assembling the main shaft bearings of our reamer-honing machines, we use manual knocking methods such as hand-held copper rods. This method affects the assembly accuracy of the bearings and may also damage the bearing accuracy. The assembly quality is also unstable, resulting in low assembly efficiency. Utility Model Content

[0003] In view of the shortcomings of the prior art, one of the purposes of this application is to provide a press-fitted bearing device, which has the advantages of precise positioning to ensure accurate assembly positioning, precise press-fitting to ensure balanced bearing force, effective protection of bearing accuracy, stable assembly quality and high assembly efficiency.

[0004] The above-mentioned purpose of the present application is achieved through the following technical solutions:

[0005] A press-fitted bearing device comprises a base and a press sleeve, wherein the base and the press sleeve cooperate to press the bearing sleeved on the main shaft to a suitable position on the main shaft, wherein the base comprises a receiving hole and a contact surface 1, wherein the receiving hole is used to receive one end of the main shaft, the contact surface 1 is used to cooperate with the end face of the bearing, the contact surface 1 is vertically arranged relative to the receiving hole, and the verticality between the center axis of the receiving hole and the contact surface 1 is set to 0 (not included) to 0.05 mm, and the press sleeve comprises a guide hole and a contact surface 2, wherein the guide hole is used to receive the other end of the main shaft, the contact surface 2 is used to cooperate with the other end face of the bearing, the contact surface 2 is vertically arranged relative to the guide hole, and the verticality between the center axis of the guide hole and the contact surface 2 is set to 0 (not included) to 0.05 mm.

[0006] By adopting the above technical solution, by controlling the verticality of the receiving hole and the contact surface one, the positioning of the main shaft after being inserted into the receiving hole is made more accurate. By controlling the verticality of the contact surface two and the guide hole, the bearing force is balanced, the bearing accuracy is effectively improved, and the assembly quality and efficiency are improved.

[0007] In a preferred example, the present application can be further configured as follows: a boss one is provided on the base, and a contact surface one is provided on the boss one.

[0008] By adopting the above technical solution, the contact surface 1 is arranged on the boss 1, which makes the processing of the contact surface 1 more convenient.

[0009] In a preferred example, the present application can be further configured as follows: the parallelism between the contact surface 1 and the bottom surface of the base is set to 0 (not included) ~ 0.03 mm.

[0010] By adopting the above technical solution and controlling the parallelism between the contact surface 1 and the bottom surface of the base, the contact surface 1 and the end surface of the bearing are more closely fitted, thereby achieving the purpose of protecting the bearing accuracy.

[0011] In a preferred example, the present application can be further configured as follows: a second boss is provided on the pressing sleeve, and a second contact surface is provided on the second boss.

[0012] By adopting the above technical solution, the second contact surface is arranged on the second boss, which makes the processing of the second contact surface more convenient.

[0013] In a preferred example, the present application can be further configured as follows: the parallelism between the second contact surface and the top surface of the press sleeve is set to 0 (not included) ~ 0.03 mm.

[0014] By adopting the above technical solution and controlling the parallelism between the second contact surface and the top surface of the press sleeve, the second contact surface and the other end surface of the bearing are more closely fitted, thereby achieving the purpose of protecting the bearing accuracy.

[0015] In a preferred example, the present application can be further configured as follows: a limiting surface is provided on the pressing sleeve, and the limiting surface is used to limit the distance that the main shaft extends into the guide hole.

[0016] By adopting the above technical solution, the limiting surface limits the distance that the main shaft extends into the guide hole, thereby limiting the position of the bearing on the main shaft.

[0017] In a preferred example, the present application can be further configured as follows: an elastic member and a receiving groove are provided on the pressing sleeve, the elastic member is used to buffer the pressure applied to the pressing sleeve by the power source, and the receiving groove is used to accommodate the elastic member and limit the position of the elastic member in the pressing sleeve.

[0018] By adopting the above technical solution, the impact force of the pressing sleeve on the bearing during pressing is reduced, and the probability of the bearing being damaged is reduced.

[0019] In a preferred example, the present application can be further configured as follows: a cover pressing piece is provided on the pressing sleeve, and the cover pressing piece is used to apply pressure to the elastic piece.

[0020] By adopting the above technical solution, the cover pressing piece enables the elastic piece to be subjected to force more evenly.

[0021] In a preferred example, the present application can be further configured as follows: a movable groove is provided on the pressing sleeve, a through hole matching the movable groove is provided on the cover pressing piece, the screw passes through the movable groove and the through hole and is connected to the nut at the other end of the movable groove, and the movable groove allows the screw to move up and down.

[0022] By adopting the above technical solution, the screw passes through the movable groove and the through hole and is connected to the nut at the other end of the movable groove, thereby preventing the cover pressing part and the elastic part from falling off the pressing sleeve. The movable groove allows the screw to move up and down, so that the cover pressing part can move up and down along the movable groove to apply pressure to the elastic part. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the cross-sectional structure of Example 1 of the present application.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the base of this application.

[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the second embodiment of the present application.

[0026] Figure 4 It is a schematic diagram of the cross-sectional structure of the compression sleeve in the second embodiment of the present application.

[0027] Figure 5 It is a schematic diagram of the cross-sectional structure of the compression sleeve in Example 3 of the present application.

[0028] Figure 6 It is a schematic diagram of the cross-sectional structure of the compression sleeve in the fourth embodiment of the present application.

[0029] Figure numerals: 1. base; 11. accommodating hole; 12. contact surface one; 13. boss one; 2. pressing sleeve; 21. guide hole; 22. contact surface two; 23. boss two; 24. limiting surface; 25. elastic member; 26. cover pressing member; 27. through hole; 28. movable groove; 29. ​​accommodating groove; 3. main shaft; 4. bearing; 5. pressure driving source. DETAILED DESCRIPTION

[0030] The present application is further described in detail below in conjunction with the accompanying drawings.

[0031] Reference Figure 1 and Figure 2 , is a press-fit bearing device disclosed in the present application, characterized in that it includes a base 1 and a press sleeve 2, and the base 1 and the press sleeve 2 cooperate to press the bearing 4 sleeved on the main shaft 3 to a suitable position on the main shaft 3.

[0032] The base 1 includes a receiving hole 11, a boss 13 and a contact surface 12. The receiving hole 11 is used to receive one end of the main shaft 3, and the contact surface 12 is used to cooperate with the end surface of the bearing 4. The contact surface 12 is arranged on the boss 13, and the contact surface 12 is vertically arranged relative to the receiving hole 11. The verticality of the central axis of the receiving hole 11 and the contact surface 12 is set to 0 (not included) ~ 0.05mm, and the parallelism of the contact surface 12 and the bottom surface of the base 1 is set to 0 (not included) ~ 0.03mm. In this embodiment, the verticality of the central axis of the receiving hole 11 and the contact surface 12 can be 0.01, 0.02, 0.03, 0.04 or 0.05mm, and the parallelism of the contact surface 12 and the bottom surface of the base 1 can be 0.01, 0.02 or 0.03mm.

[0033] The pressing sleeve 2 includes a guide hole 21, a boss 23 and a contact surface 22. The guide hole 21 is used to accommodate the other end of the main shaft 3, and the contact surface 22 is used to cooperate with the other end surface of the bearing 4. The contact surface 22 is arranged on the boss 23, and the contact surface 22 is vertically arranged relative to the guide hole 21. The verticality of the center axis of the guide hole 21 and the contact surface 22 is set to 0 (not included) ~ 0.05mm, and the parallelism of the contact surface 22 and the top surface of the pressing sleeve 2 is set to 0 (not included) ~ 0.03mm. In this embodiment, the verticality of the center axis of the guide hole 21 and the contact surface 22 can be 0.01, 0.02, 0.03, 0.04 or 0.05mm, and the parallelism of the contact surface 22 and the top surface of the pressing sleeve 2 is 0.01. The pressing sleeve 2 is also provided with a limiting surface 24, which is used to limit the distance that the main shaft 3 extends into the guide hole 21.

[0034] When performing assembly work, first place the base 1 on the workbench, then vertically insert one end of the main shaft 3 into the receiving hole 11, so that the main shaft 3 and the contact surface 1 12 are perpendicular, put the bearing 4 on the main shaft 3, and then insert the main shaft 3 into the guide hole 21, so that the main shaft 3 and the contact surface 2 22 are perpendicular, so that the contact surface 2 22 and the end face of the bearing 4 are in contact, and the installed device is moved to the center of the workbench, and the pressure driving source 5 applies a downward force to the pressing sleeve 2. In this embodiment, the pressure driving source 5 can be a hydraulic press, and the pressing sleeve 2 applies pressure to the bearing 4 and drives the bearing 4 to move downward until the end face of the main shaft 3 conflicts with the limit surface 24, and the bearing 4 is pressed into a suitable position of the main shaft 3.

[0035] The implementation principle of this embodiment is: by controlling the verticality of the accommodating hole 11 and the contact surface 1 12, and the verticality of the contact surface 2 22 and the guide hole 21, when the main shaft 3 is inserted into the accommodating hole 11 and the guide hole 21, the verticality of the main shaft 3 can be controlled, thereby controlling the verticality of the bearing 4, making the assembly positioning more accurate, and by controlling the parallelism of the contact surface 12 and the bottom surface of the base 1 and the parallelism of the contact surface 22 and the top surface of the pressing sleeve 2, the parallelism between the contact surface 12 and the contact surface 2 22 can be controlled, thereby controlling the horizontality of the bearing 4, and then making the force on the end face of the bearing 4 more balanced, achieving the purpose of effectively protecting the accuracy of the bearing 4 and improving the assembly quality, and using the pressure drive source 5 to apply force to the bearing 4 to make the assembly efficiency higher.

[0036] Reference Figure 3 and Figure 4 In the second embodiment, the pressing sleeve 2 is provided with an elastic member 25, a cover pressing member 26, a receiving groove 29 and a movable groove 28. The elastic member 25 is used to buffer the pressure applied to the pressing sleeve 2 by the power source. In this embodiment, the elastic member 25 can adopt an elastic structure with a buffering effect such as a compression spring or a rubber block. The cover pressing member 26 and the pressing sleeve 2 are detachably connected to apply pressure to the elastic member 25. The receiving groove 29 is used to accommodate the elastic member 25 and limit the position of the elastic member 25 in the pressing sleeve 2. The movable groove 28 allows the screw to move up and down.

[0037] The cover pressing member 26 is provided with a through hole 27 which matches the moving groove 28 . The screw passes through the moving groove 28 and the through hole 27 and is connected to a nut at the other end of the moving groove 28 . The screw can move up and down along the moving groove 28 .

[0038] When the cover pressing piece 26 is working, the nut is rotated so that the screw can move up and down along the movable groove 28, and the pressure driving source 5 presses the cover pressing piece 26 downward. The cover pressing piece 26 applies pressure to the elastic piece 25 and drives the bearing 4 to move downward, and is pressed to the end face of the main shaft 3 and conflicts with the limit surface 24, and the bearing 4 is pressed into the appropriate position of the main shaft 3.

[0039] The implementation principle of this embodiment is: when the pressure driving source 5 applies force to the bearing 4, the elastic member 25 provided on the pressing sleeve 2 reduces the impact force when the pressure driving source 5 presses the bearing 4, thereby reducing the probability of the bearing 4 being damaged.

[0040] See also Figure 5 In other embodiments, for the convenience of processing, no through hole may be provided on the pressing sleeve 2.

[0041] The embodiments of this specific implementation method are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore, all equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A press-fit bearing device, characterized in that: The invention comprises a base (1) and a pressing sleeve (2), wherein the base (1) and the pressing sleeve (2) cooperate to press a bearing (4) sleeved on a main shaft (3) to a suitable position on the main shaft (3), the base (1) comprises a receiving hole (11) and a contact surface (12), the receiving hole (11) is used to receive one end of the main shaft (3), the contact surface (12) is used to cooperate with the end surface of the bearing (4), the contact surface (12) is arranged vertically relative to the receiving hole (11), and the central axis of the receiving hole (11) is The verticality with the contact surface 1 (12) is set to 0 (not included) ~ 0.05mm, the pressing sleeve (2) includes a guide hole (21) and a contact surface 2 (22), the guide hole (21) is used to accommodate the other end of the main shaft (3), the contact surface 2 (22) is used to match with the other end surface of the bearing (4), the contact surface 2 (22) is vertically arranged relative to the guide hole (21), and the verticality of the central axis of the guide hole (21) and the contact surface 2 (22) is set to 0 (not included) ~ 0.05mm.

2. A press-fit bearing device according to claim 1, characterized in that: A boss one (13) is provided on the base (1), and a contact surface one (12) is provided on the boss one (13).

3. A press-fit bearing device according to claim 1, characterized in that: The parallelism between the contact surface 1 (12) and the bottom surface of the base (1) is set to 0 (not included) ~ 0.03 mm.

4. A press-fit bearing device according to claim 1, characterized in that: A second boss (23) is provided on the pressing sleeve (2), and a second contact surface (22) is provided on the second boss (23).

5. A press-fit bearing device according to claim 1, characterized in that: The parallelism between the contact surface 2 (22) and the top surface of the pressing sleeve (2) is set to 0 (not included) ~ 0.03 mm.

6. A press-fit bearing device according to claim 1, characterized in that: A limiting surface (24) is provided on the pressing sleeve (2), and the limiting surface (24) is used to limit the distance that the main shaft (3) extends into the guide hole (21).

7. A press-fit bearing device according to claim 1, characterized in that: The pressing sleeve (2) is provided with an elastic member (25) and a receiving groove (29), wherein the elastic member (25) is used to buffer the pressure applied by the power source to the pressing sleeve (2), and the receiving groove (29) is used to receive the elastic member (25) and define the position of the elastic member (25) in the pressing sleeve (2).

8. A press-fit bearing device according to claim 1, characterized in that: The pressing sleeve (2) is provided with a cover pressing piece (26), and the cover pressing piece (26) is used to apply pressure to the elastic piece (25).

9. A press-fit bearing device according to claim 8, characterized in that: The pressing sleeve (2) is provided with a moving groove (28), the cover pressing member (26) is provided with a through hole (27) matched with the moving groove (28), the screw rod passes through the moving groove (28) and the through hole (27) and is connected with a nut at the other end of the moving groove (28), and the moving groove (28) allows the screw rod to move up and down.

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