Bearing pressing tool for motor rotor

Abstract

The utility model belongs to motor production technical field, concretely relates to a bearing pressing tool for motor rotor. The utility model discloses bearing pressing tool for motor rotor includes: the inside setting telescopic passageway of cylinder, telescopic link is set in telescopic passageway, and its front end is from the front end surface of cylinder and is used for the inner ring of the bearing of waiting for pressing equipment, the inner ring top ring is protruding on the front end surface of cylinder, and surrounds telescopic link, the inner ring top ring is used for when telescopic link is pressed back telescopic passageway by motor shaft, with the end surface of the inner ring of bearing abuts. The utility model discloses bearing pressing tool for motor rotor cancels the bottom support for placing the bearing of waiting for equipment in prior art tool, and the inner ring of the bearing of waiting for equipment can be directly set in the front end of telescopic link, only the end surface of bearing inner ring is abutting on the inner ring top ring in the process of pressing motor shaft into bearing inner ring, and the outer ring of bearing does not contact with tool, and the bearing will not be damaged due to the stress of inner and outer rings simultaneously, and the product quality is improved.

Description

Technical Field

[0001] This utility model belongs to the field of motor manufacturing technology, and specifically relates to a pressure bearing tooling for motor rotors. Background Technology

[0002] Bearings are essential components in mechanical equipment, widely used, especially in the field of motors. Currently, there are roughly two common cold-pressing methods for bearing installation: the first is vertical cold pressing using a press-fitting machine and tooling, and the second is horizontal cold pressing using a servo motor, lead screw, and tooling. The motor industry currently mostly uses the second press-fitting method because it is servo-controlled, allowing for controllable output force and stroke, thus offering significant advantages in terms of functionality and precision compared to the first method. Therefore, the following discussion primarily focuses on the second method, including structural improvements and optimizations.

[0003] However, during horizontal press fitting, the positioning datum relies on the rotor's outer diameter resting on a V-block. Even if the coaxiality of the front and rear tooling is adjusted to the optimal state before press fitting, the coaxiality continues to vary slightly due to the different outer diameter tolerances of the rotors during batch press fitting. This is especially true for single-shaft rotor assemblies, where the rear bearing cannot be pre-fitted onto the shaft. Therefore, a semi-circular base must be added to the press fitting fixture. Before press fitting, the bearing needs to be pre-positioned on the base before starting the press. When a slight change in coaxiality occurs, because the bearing's outer ring rests on the base, there is a risk that the inner and outer rings of the bearing will be simultaneously stressed during the press fitting process. This can cause minor damage to the internal cage of the ball bearing after press fitting, potentially leading to abnormal noise from the bearing and affecting the overall assembly first-pass yield. Even minor changes, if not detected at the time, result in poor performance and a limited lifespan. Utility Model Content

[0004] The purpose of this invention is to provide a pressure bearing fixture for motor rotors, in order to solve the technical problem that existing fixtures are prone to bearing damage when pressure fitting due to coaxiality errors.

[0005] This application provides a pressure bearing fixture for an electric motor rotor, comprising: The cylindrical body has an internal telescopic channel; The telescopic rod is installed inside the telescopic channel, with its front end extending from the front face of the cylinder, and is used to fit the inner ring of the bearing to be press-fitted. The inner ring top ring protrudes from the front end face of the cylinder and surrounds the telescopic rod; the inner ring top ring is used to abut against the end face of the inner ring of the bearing when the telescopic rod is pushed back into the telescopic channel by the motor shaft.

[0006] In one embodiment of this application, the outer diameter of the inner ring top ring is smaller than the inner diameter of the outer ring of the bearing.

[0007] In one embodiment of this application, the inner top ring is integrally formed with the cylinder body.

[0008] In one embodiment of this application, the edge of the front end face of the telescopic rod is chamfered.

[0009] In one embodiment of this application, a spring is provided between the rear end of the telescopic rod and the rear sidewall of the telescopic channel.

[0010] In one embodiment of this application, the telescopic rod includes a small-diameter section and a large-diameter section arranged from front to back; A first stepped surface is formed at the junction of the small diameter segment and the large diameter segment; The telescopic channel includes a small-diameter channel and a large-diameter channel for respectively accommodating the small-diameter section and the large-diameter section of the telescopic rod; A second stepped surface is formed at the junction of the small-diameter channel and the large-diameter channel.

[0011] In one embodiment of this application, the rear end of the cylinder is provided with a removable rear cover.

[0012] In one embodiment of this application, the rear cover has a through hole coaxial with the telescopic rod in the center.

[0013] In one embodiment of this application, the outer periphery of the cylinder is provided with a plurality of protruding rings.

[0014] In one embodiment of this application, the outer wall of the cylinder is provided with a plurality of recesses.

[0015] The beneficial effects of this utility model are: Unlike existing technologies, this application provides a tooling for pressing bearings for motor rotors, comprising: a cylindrical body with an internal telescopic channel; a telescopic rod disposed within the telescopic channel, with its front end extending from the front end face of the cylindrical body for fitting the inner ring of the bearing to be pressed; and an inner ring top ring protruding from the front end face of the cylindrical body and surrounding the telescopic rod. The inner ring top ring is used to abut against the end face of the bearing's inner ring when the telescopic rod is pushed back into the telescopic channel by the motor shaft. This utility model's tooling for pressing bearings for motor rotors eliminates the base support used to place the bearing in existing tooling. The inner ring of the bearing can be directly fitted onto the front end of the telescopic rod. During the pressing of the motor shaft into the bearing's inner ring, only the end face of the bearing's inner ring abuts against the inner ring top ring; the outer ring of the bearing does not contact the tooling, preventing simultaneous stress on both the inner and outer rings and thus avoiding bearing damage, thereby improving product quality.

[0016] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention are realized and obtained through the structures particularly pointed out in the description and the accompanying drawings.

[0017] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a front perspective view of a preferred embodiment of the pressure bearing tooling for a motor rotor of the present invention; Figure 2 This is a rear perspective view of a preferred embodiment of the pressure bearing tooling for a motor rotor of the present invention; Figure 3 This is a schematic diagram of bearing press-fitting according to a preferred embodiment of the present invention; Figure 4 This is a cross-sectional view of a motor rotor pressure bearing tooling according to a preferred embodiment of the present invention.

[0020] In the picture: 1. Cylinder body, 11. Telescopic channel, 111. Small diameter channel, 112. Large diameter channel, 113. Second step surface, 114. Rear cover, 12. Through hole, 121. Convex ring, 13. Recess, 14. Telescopic rod, 2. Chamfer, 21. Small diameter section, 22. Large diameter section, 23. First step surface, 24. Bearing, 3. Inner ring, 31. Inner ring top ring, 4. Motor shaft, 5. Spring, 6. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] This application provides a pressure bearing tooling for an electric motor rotor, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0023] See Figure 1 and Figure 3 In one embodiment, the pressure bearing fixture for the motor rotor includes: The cylindrical body 1 has an internal telescopic channel 11; Telescopic rod 2 is installed inside telescopic channel 11, and its front end extends from the front end face of cylinder 1, for fitting the inner ring 31 of bearing 3 to be press-fitted; The inner top ring 4 protrudes from the front end face of the cylinder 1 and surrounds the telescopic rod 2; the inner top ring 4 is used to abut against the end face of the inner ring 31 of the bearing 3 when the telescopic rod 2 is pushed back into the telescopic channel 11 by the motor shaft 5.

[0024] In this embodiment, during operation, the inner ring 31 of the bearing 3 to be press-fitted can first be fitted onto the front end of the telescopic rod 2; when the motor shaft 5 presses... Figure 3 When the inner ring 31 of the bearing 3 is pressed into the F direction, the end face of the inner ring 31 of the bearing 3 abuts against the inner ring top ring 4, so that the outer ring 32 of the bearing 3 never contacts the tooling. Even if there is an error in the coaxiality between the motor shaft 5 and the bearing 3 during pressing, the inner ring 31 and the outer ring 32 will not be subjected to force at the same time, thus avoiding damage to the bearing 3. As the motor shaft 5 is pushed in, the telescopic rod 2 is pushed back into the telescopic channel 11 until it is completely separated from the inner ring 31 of the bearing 3.

[0025] Preferably, the outer diameter of the inner ring top ring 4 is smaller than the inner diameter of the outer ring 32 of the bearing 3, so that the inner ring top ring 4 will not contact the end face of the outer ring 32.

[0026] Optionally, the inner top ring 4 is integrally formed with the cylinder body 1.

[0027] Optionally, to facilitate the installation of the bearing 3 at the front end of the telescopic rod 2, the edge of the front end face of the telescopic rod 2 may be chamfered 21.

[0028] See Figure 3 and Figure 4 Optionally, a spring 6 is provided between the rear end of the telescopic rod 2 and the rear side wall of the telescopic channel 11. The spring 6 facilitates the reset of the telescopic rod 2.

[0029] See Figure 4 Optionally, the telescopic rod 2 includes a small-diameter section 22 and a large-diameter section 23 arranged from front to back; a first stepped surface 24 is formed at the junction of the small-diameter section 22 and the large-diameter section 23; the telescopic channel 11 includes a small-diameter channel 111 and a large-diameter channel 112 for respectively accommodating the small-diameter section 22 and the large-diameter section 23 of the telescopic rod 2; a second stepped surface 113 is formed at the junction of the small-diameter channel 111 and the large-diameter channel 112.

[0030] In this embodiment, the cooperation between the first step surface 24 and the second step surface 113 can limit the telescopic rod 2 and prevent the telescopic rod 2 from being pushed out of the telescopic channel 11.

[0031] See Figure 2 and Figure 3 In this embodiment, optionally, a detachable rear cover 12 is provided at the rear end of the cylinder 1. This allows the rear cover 12 to be easily opened to accommodate the telescopic rod 2 and the spring 6. The rear cover 12 may, but is not limited to, be connected to the rear end of the cylinder 1 using a fastener.

[0032] In this embodiment, optionally, the rear cover 12 is provided with a through hole 121 coaxial with the telescopic rod 2 in the center.

[0033] In one application scenario, when the bearing 3 is sleeved on the telescopic rod 2, in order to prevent the telescopic rod 2 from retracting, a push rod can be used to extend from the through hole 121 into the telescopic channel 11 and push against the rear end of the telescopic rod 2.

[0034] Optionally, the outer periphery of the cylinder 1 is provided with a plurality of protruding rings 13.

[0035] Optionally, the outer wall of the cylinder 1 is provided with a plurality of recesses 14.

[0036] In some embodiments, the protruding ring 13 or the recessed portion 14 can conveniently fix the cylinder 1 onto some equipment or clamps.

[0037] In summary, the motor rotor press bearing fixture of this utility model positions the inner ring of the bearing to the telescopic rod, leaving the outer ring of the bearing completely unloaded. During press fitting, the outer ring of the bearing is not subjected to force, thus completely preventing bearing damage. Installation is convenient; simply slip the bearing onto the end of the telescopic rod. The accuracy requirements for coaxiality adjustment of the press fitting equipment are reduced, decreasing adjustment time and improving efficiency. The first-pass yield is increased, reducing the number of disassemblies due to bearing damage, resulting in more reliable quality. The normal service life of the bearing is ensured, leading to a lower customer complaint rate and reduced after-sales maintenance costs.

[0038] It should be noted that all the devices (parts whose specific structures are not specified) selected in this application are general standard parts or parts known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0039] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections.

[0040] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0041] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A pressure bearing fixture for an electric motor rotor, characterized in that, include: The cylindrical body (1) has an internal telescopic channel (11). Telescopic rod (2) is set in telescopic channel (11) and its front end extends from the front end face of cylinder (1) for fitting the inner ring (31) of bearing (3) to be press-fitted. The inner top ring (4) protrudes from the front end face of the cylinder (1) and surrounds the telescopic rod (2); the inner top ring (4) is used to abut against the end face of the inner ring (31) of the bearing (3) when the telescopic rod (2) is pushed back into the telescopic channel (11) by the motor shaft (5).

2. The bearing pressure fixture according to claim 1, characterized in that, The outer diameter of the inner ring top ring (4) is smaller than the inner diameter of the outer ring (32) of the bearing (3).

3. The bearing pressure fixture according to claim 1, characterized in that, The inner top ring (4) is integrally formed with the cylinder (1).

4. The bearing pressure fixture according to claim 1, characterized in that, The front end face of the telescopic rod (2) is chamfered (21).

5. The bearing pressure fixture according to claim 1, characterized in that, A spring (6) is provided between the rear end of the telescopic rod (2) and the rear side wall of the telescopic channel (11).

6. The bearing clamping fixture according to claim 5, characterized in that, The telescopic rod (2) includes a small diameter section (22) and a large diameter section (23) arranged from front to back. A first stepped surface (24) is formed at the junction of the small diameter segment (22) and the large diameter segment (23). The telescopic channel (11) includes a small-diameter channel (111) and a large-diameter channel (112) for respectively accommodating the small-diameter section (22) and the large-diameter section (23) of the telescopic rod (2). A second stepped surface (113) is formed at the junction of the small-diameter channel (111) and the large-diameter channel (112).

7. The bearing pressure fixture according to claim 1, characterized in that, The rear end of the cylinder (1) is provided with a removable rear cover (12).

8. The bearing pressure fixture according to claim 7, characterized in that, The rear cover (12) has a through hole (121) in the center, which is coaxial with the telescopic rod (2).

9. The bearing pressure fixture according to claim 1, characterized in that, The outer periphery of the cylinder (1) is provided with several protruding rings (13).

10. The bearing clamping fixture according to claim 1, characterized in that, The outer wall of the cylinder (1) is provided with several recesses (14).

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