Portable bearing mounting mechanism

Abstract

The utility model relates to the field of bearing installation, in particular to a portable bearing installation mechanism, which is characterized in that a bearing to be assembled is coaxially arranged on the outer ring of a main shaft, a pressing sleeve is coaxially sleeved outside the main shaft, the end face of the pressing sleeve is simultaneously abutted against and matched with the inner ring and the outer ring of the bearing to be assembled, and a pressing piece in threaded fit with the main shaft is coaxially fixed on the main shaft. And the pressing piece is in threaded fit with the main shaft and applies axial pressing force towards the assembling direction of the to-be-assembled bearing to the pressing sleeve at the same time. According to the utility model, the bearing is assembled under the condition of uniform stress, and the bearing is prevented from being damaged during assembly.

Description

Technical Field

[0001] This utility model relates to the field of bearing installation, specifically a portable bearing installation mechanism. Background Technology

[0002] Roots vacuum pumps are commonly used vacuum generating devices. They are high-precision equipment with highly precise components and demanding assembly requirements. Tight tolerances make assembly challenging. When installing bearings, the inner ring is first heated. The heated inner ring expands, increasing its inner diameter. This expansion makes it easier for the bearing to slide onto the shaft, reducing friction and resistance during installation. After expansion, axial pressure is usually applied to the bearing by tapping, causing it to slide along the shaft towards the bearing housing to the desired position. Once cooled, the bearing returns to its original size, completing the installation process.

[0003] However, the traditional method of hammering bearings to apply force can lead to uneven force on the bearings during installation due to different hammering points, which can easily cause assembly errors. At the same time, the bearings are also at risk of being damaged by the hammering, posing a safety hazard. Therefore, this problem urgently needs to be solved. Utility Model Content

[0004] To avoid and overcome the technical problems existing in the prior art, this utility model provides a portable bearing mounting mechanism. This utility model enables the bearing to be assembled under uniform force, avoiding damage to the bearing during assembly.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A portable bearing mounting mechanism is provided, wherein the bearing to be assembled is coaxially arranged on the outer ring of the main shaft, and a pressure sleeve is coaxially sleeved on the outside of the main shaft. The end face of the pressure sleeve simultaneously abuts against the inner ring and the outer ring of the bearing to be assembled. A clamping member is coaxially fixed on the main shaft and threadedly engaged with the main shaft. The clamping member and the main shaft threadedly engage with each other and simultaneously apply an axial clamping force to the pressure sleeve in the assembly direction of the bearing to be assembled.

[0007] As a further embodiment of this utility model: an annular positioning groove is provided at the end of the pressure sleeve away from the bearing to be assembled, and the clamping element is an auxiliary bearing arranged coaxially with the main shaft and set in the positioning groove. The clamping element is a pressure head that is threaded with the screw, the pressure head abuts against the inner ring of the auxiliary bearing, and rotates coaxially with the pressure sleeve through the auxiliary bearing.

[0008] As a further improvement of this utility model: the depth of the positioning groove corresponds to the height of the auxiliary bearing, and the outer ring of the auxiliary bearing abuts against the bottom surface of the positioning groove.

[0009] As a further improvement of this utility model: a clamping nut is coaxially provided on the pressure head, and the clamping nut and / or the pressure head are threadedly engaged with the main shaft.

[0010] As a further improvement of this utility model, an elastic pad is provided on the contact surface between the pressure sleeve and the bearing to be assembled.

[0011] As a further improvement of this utility model: the pressure sleeve has a multi-segment split structure along the axial direction, and each segment of the pressure sleeve is sleeved on the outer ring of the main shaft and abuts against it in sequence.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. During installation, tighten the clamping nut. The pressure head moves towards the assembly direction of the bearing to be assembled under the action of the threaded engagement. While the pressure head moves, it applies pressure to the auxiliary bearing, causing the pressure sleeve to move synchronously, thereby applying pressure to the bearing to be assembled and moving it towards the set installation position until it is installed in place. This ensures that the bearing is assembled under uniform force, avoiding damage to the bearing during assembly.

[0014] 2. This utility model adjusts the installation depth of the bearing to be assembled by controlling the number of turns of the clamping nut, which can accurately control the installation position of the bearing; through the cooperation of the auxiliary bearing and the pressure head, the helical motion of the screw is converted into the axial linear motion of the pressure sleeve, and pressure is applied evenly to the inner and outer rings of the bearing to be assembled.

[0015] 3. The pressure sleeve of this utility model is set as a multi-segment type. The length of the pressure sleeve is combined according to the different lengths of the main shaft so that it is adapted to the total length of the main shaft, and has wide adaptability. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] In the picture:

[0018] 1. Main spindle; 2. Pressure sleeve; 21. Positioning groove; 22. Auxiliary bearing;

[0019] 3. Bearing to be assembled; 4. Pressure head; 5. Screw; 51. Compression nut. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 In this embodiment of the utility model, a portable bearing installation mechanism is provided. Before the bearing 3 to be assembled is installed, the inner ring is preheated. After the heating is completed, it is sleeved on the end of the main shaft 1 and awaits installation.

[0022] The spindle 1 has a threaded hole pre-drilled at its end, and the screw 5 is installed in the threaded hole to form a threaded fit with the spindle 1.

[0023] After the bearing 3 to be assembled is pre-installed at the end of the spindle 1, a pressure sleeve 2 is coaxially sleeved on the outside of the spindle 1. The end face of the pressure sleeve 2 simultaneously abuts against the inner ring and the outer ring of the bearing 3 to be assembled.

[0024] The end of the pressure sleeve 2 away from the bearing 3 to be assembled has a positioning groove 21. An auxiliary bearing 22 is installed in the positioning groove 21, and the outer ring of the auxiliary bearing 22 abuts against the bottom surface of the positioning groove 21 from top to bottom.

[0025] The positioning groove 21 is an annular groove, which corresponds to the shape of the outer ring of the auxiliary bearing 22, and its groove depth corresponds to the height of the auxiliary bearing 22.

[0026] A pressure head 4 is coaxially fixed to the screw 5, and the end face of the pressure head 4 facing the bearing 3 to be assembled is disc-shaped. A clamping nut 51 is coaxially fixed to the pressure head 4. By tightening the clamping nut 51, force is applied to the pressure head 4, and the pressure head 4 abuts against the inner ring of the auxiliary bearing 22 from top to bottom. While tightening the clamping nut 51, the pressure head 4 moves in the assembly direction of the bearing 3 to be assembled under the action of the threaded engagement. As the pressure head 4 moves, it applies pressure to the auxiliary bearing 22, causing the pressure sleeve 2 to move synchronously, thereby applying pressure to the bearing 3 to be assembled, causing it to move towards the set installation position until it is installed in place.

[0027] To prevent the pressure sleeve 2 from damaging the bearing 3 to be assembled, an elastic rubber ring is provided on the end face of the pressure sleeve 2 to form a pad.

[0028] To accommodate different lengths of the main spindle 1, the pressure sleeve 2 is designed to be multi-segmented. The length of the pressure sleeve 2 is combined according to the different lengths of the main spindle 1 so that it matches the total length of the main spindle 1. The different segments of the pressure sleeve 2 are sequentially engaged and fitted.

[0029] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0030] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A portable bearing mounting mechanism, characterized in that, The bearing (3) to be assembled is coaxially arranged on the outer ring of the main shaft (1), and the pressure sleeve (2) is coaxially sleeved on the outside of the main shaft (1). The end face of the pressure sleeve (2) simultaneously abuts against the inner ring and the outer ring of the bearing (3) to be assembled. A clamping member is coaxially fixed on the main shaft (1) and threadedly engaged with the main shaft (1). The clamping member and the main shaft (1) threadedly engage with each other and simultaneously apply an axial clamping force to the pressure sleeve (2) in the direction of the assembly of the bearing (3) to be assembled.

2. The portable bearing mounting mechanism according to claim 1, characterized in that, The end of the pressure sleeve (2) away from the bearing (3) to be assembled has an annular positioning groove (21). The clamping element is an auxiliary bearing (22) arranged in the positioning groove (21) and coaxially with the main shaft (1). The clamping element is a pressure head (4) that is threaded with the screw (5). The pressure head (4) abuts against the inner ring of the auxiliary bearing (22) and rotates coaxially with the pressure sleeve (2) through the auxiliary bearing (22).

3. The portable bearing mounting mechanism according to claim 2, characterized in that, The depth of the positioning groove (21) corresponds to the height of the auxiliary bearing (22), and the outer ring of the auxiliary bearing (22) abuts against the bottom surface of the positioning groove (21).

4. A portable bearing mounting mechanism according to claim 2 or 3, characterized in that, A clamping nut (51) is coaxially provided on the pressure head (4), and the clamping nut (51) and / or the pressure head (4) are threadedly engaged with the main shaft (1).

5. A portable bearing mounting mechanism according to any one of claims 1 to 3, characterized in that, An elastic pad is provided on the contact surface between the pressure sleeve (2) and the bearing (3) to be assembled.

6. A portable bearing mounting mechanism according to any one of claims 1 to 3, characterized in that, The pressure sleeve (2) has a multi-segment split structure along the axial direction. Each segment of the pressure sleeve (2) is sleeved on the outer ring of the main shaft (1) and abuts against it in sequence.

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