A motor assembly tool for simultaneously pressing bearings and end covers

Abstract

The present invention relates to the field of tooling, and in particular to a motor assembly tool for simultaneously pressing bearings and end covers. It comprises a stator mounting assembly and a rotor mounting assembly; the stator mounting assembly comprises a stator end mounting turntable, a retractable push rod mechanism and a stator clamping component; the rotor mounting assembly comprises a screw driving mechanism connected in sequence from bottom to top, and a rotor mounting turntable movable along the screw driving mechanism; the retractable push rod mechanism comprises a push rod arranged in the center of the stator end mounting turntable and a guide tube arranged outside the push rod; the top surface of the rotor mounting turntable is provided with a rotor clamping component for clamping the rotor assembly.

Description

Technical Field

[0001] The invention relates to the field of tooling devices, and in particular to a motor assembly tool for simultaneously pressing a bearing and an end cover. Background Art

[0002] At present, when press-fitting the bearings and end covers of permanent magnet servo motors, the pre-installed rotor assembly needs to be manually pressed into the casing, and then the motor is turned over to press-fit the bearings, and finally the end covers are press-fitted. However, this press-fitting method has the following problems: 1. The permanent magnets embedded in the rotor assembly have great magnetic force and have a strong adsorption capacity for magnetic conductive materials such as the stator. When the rotor assembly is manually inserted into the stator assembly, the stator and rotor are very likely to attract and collide with each other, causing damage to components such as bearings and magnetic steel, thereby bringing quality risks to the motor. 2. There are many manual installation processes and low production efficiency. Summary of the invention

[0003] The purpose of the present invention is to provide a motor assembly tool for simultaneously pressing bearings and end covers, which is less likely to cause collision between the stator and the rotor during installation and improves production efficiency.

[0004] The technical solution of the present invention is as follows:

[0005] It comprises a stator mounting assembly and a rotor mounting assembly; the stator mounting assembly comprises a stator end mounting turntable, a retractable push rod mechanism and a stator clamping component; the rotor mounting assembly comprises a screw driving mechanism connected in sequence from bottom to top and a rotor mounting turntable movable along the screw driving mechanism; the retractable push rod mechanism comprises a push rod arranged in the center of the stator end mounting turntable and a guide tube arranged outside the push rod; the top surface of the rotor mounting turntable is provided with a rotor clamping component for clamping the rotor assembly.

[0006] The rotor clamping component comprises a placement table arranged in the center of the top surface of the rotor mounting turntable, and a plurality of clamping components evenly distributed on the top surface of the rotor mounting turntable in a circular shape with the central axis of the placement table as the center.

[0007] A third spring is sleeved on the push rod between the guide tube and the push rod.

[0008] The clamping assembly includes a support plate and a locking rod arranged in the support plate.

[0009] The stator clamping component is arranged at the top of the stator end mounting turntable; the stator clamping component includes a base, a bearing support seat arranged in the center of the base, a bearing positioning seat sleeved on the top of the bearing support seat, a front end cover fixing seat arranged outside the bearing positioning seat, and a casing fixing seat arranged above the front end cover fixing seat.

[0010] Two guide posts are arranged opposite to each other on both sides of the base, and the guide posts penetrate the front cover fixing seat and are connected to the casing fixing seat.

[0011] The cross section of the bearing locating seat is in an "L" shape.

[0012] The screw drive mechanism is a screw nut pair.

[0013] The bearing support seat is sleeved with a first spring; the guide pillars between the housing fixing seat and the front end cover fixing seat are sleeved with a second spring.

[0014] The beneficial effects of the present invention are as follows: the permanent magnet servo motor is assembled by adopting this scheme so that the axial center lines of the stator and the rotor are basically overlapped, ensuring that the electromagnetic force between the permanent magnet rotor and the stator is minimized, so that the adsorption force between the stator and the rotor will be reduced to a minimum (theoretically, the adsorption force is zero when they are completely overlapped), thereby ensuring the smooth completion of the assembly. The present invention adopts a unique displacement mechanism to place the bearings, housing, end cover, and rotor parts to be installed in a vertical position, making them easy to position and clamp. When assembling, the displacement mechanism is used to rotate the motor to be installed to a horizontal position to change it into a horizontal installation. This horizontal installation ensures that the assembly force applied by the drive mechanism and the magnetic attraction between the stator and the rotor are a pair of balancing forces to ensure that the assembly is in a stable state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings.

[0016] in: Figure 1 It is a schematic diagram of the structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the horizontal position structure of the rotor mounting turntable of the present invention;

[0018] In the accompanying drawings, 1 is a stator end mounting turntable, 2 is a retractable push rod mechanism, 3 is a stator clamping component, 4 is a screw drive mechanism, 5 is a rotor mounting turntable, 6 is a rotor clamping component, 7 is a guide column, 8 is a stepped hole, 9 is a first spring, and 10 is a second spring;

[0019] 2.1 is the ejector rod, 2.2 is the guide tube, and 2.3 is the third spring;

[0020] 3.1 is the base, 3.2 is the bearing support seat, 3.3 is the bearing positioning seat, 3.4 is the front cover fixing seat, and 3.5 is the casing fixing seat;

[0021] 4.1 is the support plate, 4.2 is the screw rod, and 4.3 is the nut;

[0022] 6.1 is a placing table, 6.3 is a supporting plate, and 6.4 is a locking rod. DETAILED DESCRIPTION

[0023] See also Figure 1-2As shown, a motor assembly tool for simultaneously pressing bearings and end covers comprises a stator mounting assembly and a rotor mounting assembly; the stator mounting assembly comprises a stator end mounting turntable 1, a retractable push rod mechanism 2 and a stator clamping component 3; the rotor mounting assembly comprises a screw drive mechanism 4, a rotor mounting turntable 5 and a rotor clamping component 6 connected in sequence from bottom to top; the retractable push rod mechanism comprises a push rod arranged in the center of the stator end mounting turntable and a guide tube 2.2 arranged outside the push rod 2.1; the rotor clamping component comprises a placement table 6.1 arranged in the center of the top surface of the rotor mounting turntable, and a plurality of clamping components uniformly distributed in a circle on the top surface of the rotor mounting turntable with the central axis of the placement table as the center. By rotating the stator end mounting turntable to a vertical position, the bearings, end covers, and stator assemblies to be assembled are placed on the stator clamping component in turn and tightened with screws; at this time, the rotor mounting turntable is also in a vertical position, and the rotor assembly is clamped by the placement table and the clamping assembly on the rotor clamping component, and the stator end mounting turntable and the rotor mounting turntable are flipped to a horizontal assembly position; the screw drive mechanism is driven to move the rotor mounting platform forward, and the motor shaft and the retractable push rod are manually aligned to a concentric position, and the rotor mounting platform continues to move forward; under the straightening action of the retractable push rod, the rotor assembly continues to move toward the stator direction to maintain a concentric state with the base, enter the stator, continue to move forward, and sequentially contact the end cover and the bearing, and assemble along the center line. Preferably, three clamping assemblies are used.

[0024] A third spring 2.3 is sleeved on the top rod between the guide tube and the top rod. By providing the third spring, when the rotor assembly enters, the rotor assembly is firmly pressed against by the action of the spring, so that it is not easy to collide with the magnetic steel.

[0025] The clamping assembly comprises a support plate 6.3 and a locking rod 6.4 arranged in the support plate. The bearing is placed on the placement table and then fixed by the locking plate.

[0026] The stator clamping component is arranged at the top of the stator end mounting turntable; the stator clamping component includes a base 3.1, a bearing support seat 3.2 arranged in the center of the base, a bearing positioning seat 3.3 sleeved on the top of the bearing support seat, a front end cover fixing seat 3.4 arranged outside the bearing positioning seat, and a housing fixing seat 3.5 arranged above the front end cover fixing seat. The bearing support seat is used to support the bearing, and the bearing positioning seat plays a role in positioning and limiting the bearing during the bearing installation process; the front end cover fixing seat is used to fix the front end cover; and the housing fixing seat is used to fix the housing.

[0027] Two guide posts 7 are arranged on opposite sides of the base, and the guide posts penetrate the front cover fixing seat and are connected to the housing fixing seat. The housing, the bearing and the front cover are coaxial with each other through the guiding and positioning function of the guide posts.

[0028] The cross section of the bearing locating seat is in an "L" shape. L-shaped positioning is more accurate and can ensure coaxiality.

[0029] The mounting hole at the center of the top end of the front end cover fixing seat is a stepped hole 8. Since the stepped hole is more compatible with the front end cover shape, it is convenient to install.

[0030] The screw drive mechanism is a screw nut pair. The screw nut pair includes a screw rotatably fixed between two support plates 4.1 and a nut 4.3 arranged on the screw 4.2, and the nut is connected to the rotor mounting platform; the nut on the screw drive mechanism is connected to the rotor mounting platform, so that when the nut moves along the screw, it will drive the rotor mounting platform to move to a suitable position.

[0031] The bearing support seat is provided with a first spring 9, and the guide pillars between the housing fixing seat and the front cover fixing seat are provided with a second spring 10. The supporting force generated by the spring compression ensures that the floating housing, bearing and front cover are in the correct installation position.

[0032] Here's how it works:

[0033] 1 Drive the screw drive mechanism to move the rotor mounting table back to a suitable position.

[0034] 2. Rotate the stator end mounting turntable in the assembly tool around the pin to a vertical position, and place the bearing to be assembled on the bearing positioning seat, the end cover on the end cover fixing seat, and the stator assembly on the housing fixing seat and tighten them with screws. The supporting force generated by the spring compression ensures that the stator assembly, bearing, and end cover to be installed are in a floating state. The guiding and positioning function of the guide column ensures that the housing, bearing, and front end cover are coaxial with each other. At this time, the retractable push rod is in the initial working position.

[0035] 3 Rotate the rotor mounting table in the assembly tooling around the pin shaft to a vertical position, place the rotor assembly to be assembled on the rotor mounting table and clamp it with a rotor clamping block.

[0036] 4 Turn over the stator end mounting turntable and the rotor mounting turntable to the horizontal assembly position respectively.

[0037] 5. Drive the screw drive mechanism to move the rotor mounting platform forward, manually straighten the motor shaft and the telescopic push rod to a concentric position, and continue to move the rotor mounting platform forward. At this time, the reaction force generated by the spring in the telescopic push rod mechanism makes the push rod and the rotor tightly connected. Under the straightening action of the telescopic push rod, the rotor enters the stator while maintaining a concentric state with the base. When the rotor assembly contacts the stator, it will continue to move forward and contact the front cover and the front bearing in turn. The bearing is positioned in a fixed position by the bearing support seat. Under the action of the screw drive mechanism, the front cover, front bearing, stator, and rotor assembly are assembled along the center line.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent changes made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A motor assembly tool for simultaneously pressing bearings and end covers, characterized in that: The invention comprises a stator mounting assembly and a rotor mounting assembly; the stator mounting assembly comprises a stator end mounting turntable, a retractable push rod mechanism and a stator clamping component; the rotor mounting assembly comprises a screw driving mechanism connected in sequence from bottom to top, and a rotor mounting turntable movable along the screw driving mechanism; the retractable push rod mechanism comprises a push rod arranged in the center of the stator end mounting turntable and a guide tube arranged outside the push rod; a rotor clamping component for clamping the rotor assembly is arranged on the top surface of the rotor mounting turntable; the rotor clamping component comprises a placing table arranged in the center of the top surface of the rotor mounting turntable, and a plurality of clamping components uniformly distributed on the top surface of the rotor mounting turntable in a circular shape with the central axis of the placing table as the center; the clamping assembly comprises a support plate, and a locking rod arranged in the support plate; the stator clamping component is arranged on the top end of the stator end mounting turntable; the stator clamping component comprises a base, a bearing support seat arranged in the center of the base, a bearing positioning seat sleeved on the top end of the bearing support seat, a front end cover fixing seat arranged outside the bearing positioning seat, and a casing fixing seat arranged above the front end cover fixing seat.

2. The motor assembly tool for simultaneously pressing bearings and end covers according to claim 1, characterized in that: A third spring is sleeved on the push rod between the guide tube and the push rod.

3. The motor assembly tool for simultaneously pressing bearings and end covers according to claim 1, characterized in that: Two guide posts are arranged opposite to each other on both sides of the base, and the guide posts penetrate the front cover fixing seat and are connected to the casing fixing seat.

4. The motor assembly tool for simultaneously pressing bearings and end covers according to claim 1, characterized in that: The cross section of the bearing locating seat is in an "L" shape.

5. The motor assembly tool for simultaneously pressing bearings and end covers according to claim 1, characterized in that: The screw drive mechanism is a screw nut pair.

6. The motor assembly tool for simultaneously pressing bearings and end covers according to claim 3, characterized in that: The bearing support seat is sleeved with a first spring; the guide pillars between the housing fixing seat and the front end cover fixing seat are sleeved with a second spring.

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