Box closing equipment for synchronously pulling and pressing rotor ball bearing during stator and rotor box closing

Abstract

The utility model relates to box closing equipment for synchronously pulling and pressing a rotor ball bearing during box closing of a stator and a rotor. The box closing equipment comprises a motor shell gripping apparatus, a centralizing pulling and pressing structure, a pulling and pressing counter-force mechanism and a pulling and pressing electric cylinder, the centralizing tension-compression structure is provided with a tension-compression centralizing rod and a tension-compression pressure head; the lower end of the pulling and pressing head abuts against a bearing installed in the motor shell small assembly. The tension-compression righting rod penetrates through the tension-compression pressure head and is detachably and fixedly connected with the rotor shaft; wherein the pulling and pressing righting rod moves along with the pulling and pressing electric cylinder to drive the rotor shaft to move upwards, the mounting plate where the pulling and pressing pressing head is located is connected with a pulling and pressing counter-force plate extending in the vertical direction, and the pulling and pressing counter-force mechanism abuts against the upper end of the pulling and pressing counter-force plate to reversely press the bearing into the rotor shaft. The assembly process sequence is adjusted, the bearing is installed on the small motor shell assembly in advance, the ball bearing is synchronously pulled and pressed into the rotor shaft when the stator and the rotor are assembled, and meanwhile, the inner ring of the bearing is jacked by the pulling and pressing head, so that the bearing quality is prevented from being damaged due to the stress of the ball bearing.

Description

Technical Field

[0001] The utility model relates to the field of rotor motor box assembly equipment, in particular to a stator-rotor box assembly equipment for synchronously pulling and pressing a rotor ball bearing. Background Art

[0002] Stator-rotor assembly is a commonly used electric drive assembly process. Part of the process is to first press the ball bearing onto the rotor shaft neck. The ball bearing and the rotor are interference fit. Then, during assembly, the mechanism synchronously presses the rotor with the bearing into the motor housing.

[0003] When the ball bearing is pressed into the motor housing as the rotor is pressed into the motor housing, the clearance between the outer ring of the bearing and the bearing chamber on the motor housing is small, and a pressing force is generated to the outer ring of the ball bearing. The process pressure used in the stator-rotor assembly equipment far exceeds the axial pressure that the outer ring of the ball bearing can withstand, which will damage the quality of the ball bearing. Utility Model Content

[0004] The utility model aims to provide a stator-rotor assembly device for synchronously pulling and pressing a rotor ball bearing, aiming to overcome the defects of the prior art and solve the problem that the outer ring of the rotor journal ball bearing is axially stressed and damages the bearing when the stator-rotor assembly is performed.

[0005] To this end, the utility model proposes a stator-rotor assembly synchronously pulling and pressing the rotor ball bearing assembly device, comprising a motor housing gripper, a straightening and pulling and pressing structure, a pulling and pressing reaction force mechanism and a pulling and pressing electric cylinder; the motor housing gripper is used to grasp the motor housing subassembly including the stator; the straightening and pulling and pressing structure comprises a pulling and pressing straightening rod and a pulling and pressing head; the pulling and pressing head is located at the center of the motor housing gripper, and the lower end of the pulling and pressing head conflicts with the bearing installed in the motor housing subassembly; and the pulling and pressing straightening rod passes through the pulling and pressing head and is detachably fixedly connected to the rotor shaft;

[0006] Among them, the tension and compression straightening rod moves with the tension and compression electric cylinder to drive the rotor shaft to move upward, and the mounting plate where the tension and compression head is located is connected to a tension and compression reaction plate extending in the vertical direction. The tension and compression reaction force mechanism supports the upper end of the tension and compression reaction force plate to press the bearing back into the rotor shaft.

[0007] As a preferred technical solution of the present application, the motor housing gripper is slidably connected to the frame of the closing device via a closing vertical slide.

[0008] As a preferred technical solution of the present application, the motor housing gripper is driven by a vertical slide drive motor.

[0009] As a preferred technical solution of the present application, a horizontal sliding table for closing the box is provided under the motor housing gripper, which is used to deliver the motor housing subassembly including the stator and the reducer subassembly including the rotor shaft into the closing device.

[0010] As a preferred technical solution of the present application, the upper end of the tension and compression straightening rod is provided with a horizontal step, and the straightening tension and compression structure is provided with a horizontal groove matching the horizontal step.

[0011] As a preferred technical solution of the present application, the straightening and tensioning structure also includes a straightening top, which extends out to support the upper end of the tensioning and compression straightening rod to keep the rotor in a vertical state when the box is closed.

[0012] As a preferred technical solution of the present application, the tension and compression reaction mechanism is installed on the upper part of the box closing equipment and is located above the straightening tension and compression structure.

[0013] As a preferred technical solution of the present application, a pair of tension and compression reaction plates are symmetrically arranged about the tension and compression straightening rod.

[0014] As a preferred technical solution of the present application, the tension and compression straightening rod is fixedly connected to the rotor shaft through an expansion sleeve structure.

[0015] As a preferred technical solution of the present application, the tension and compression head is fixedly connected with the rotor shaft through threaded cooperation.

[0016] The utility model provides a stator-rotor assembly and synchronously pulls and presses the rotor ball bearing. By adjusting the assembly process sequence, the bearing is pre-installed on the motor housing subassembly. When the stator and rotor are assembled, the ball bearing is synchronously pulled and pressed into the rotor shaft. At the same time, the inner ring of the bearing is supported by a pulling and pressing head to prevent the ball bearing from being stressed and damaging the bearing quality.

[0017] The above-mentioned multiple mechanisms cooperate to realize the stator-rotor assembly and the rotor bearing press-fitting function at the same time, avoiding the bearing outer ring being subjected to stress resulting from pressing the bearing onto the rotor shaft and then assembling the bearing, resulting in a bad bearing. The overall structure is compact and occupies a small space. The press-fitting is completed while the assembly process is completed. The process integration reduces the assembly cost and avoids the bearing outer ring being subjected to stress resulting from pressing the bearing onto the rotor shaft and then assembling the bearing, resulting in a bad bearing.

[0018] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting part of the present application are used to provide a further understanding of the present application. The exemplary embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0020] Figure 1 It is an axonometric diagram of the stator-rotor assembly equipment for synchronously pulling and pressing the rotor ball bearing of the utility model;

[0021] Figure 2 This is the front view of the casing equipment for the stator-rotor combined casing synchronous pulling and pressing rotor ball bearing of the present utility model;

[0022] Figure 3 This is the side sectional view of the casing equipment for the stator-rotor combined casing synchronous pulling and pressing rotor ball bearing of the present utility model;

[0023] Figure 4 This is the partial enlarged sectional view of the casing equipment for the stator-rotor combined casing synchronous pulling and pressing rotor ball bearing of the present utility model Figure 1 ;

[0024] Figure 5 This is the partial enlarged sectional view of the casing equipment for the stator-rotor combined casing synchronous pulling and pressing rotor ball bearing of the present utility model Figure 2 ;

[0025] Explanation of reference numerals in the drawings

[0026] 1. Motor housing gripper; 2. Alignment pulling and pressing structure; 3. Pulling and pressing reaction mechanism; 4. Casing horizontal slide; 5. Casing vertical slide; 6. Pulling and pressing alignment rod; 7. Pulling and pressing head; 8. Horizontal groove; 9. Alignment tip; 10. Bearing; 11. Rotor shaft; 12. Stator; 13. Pulling and pressing electric cylinder; 14. Vertical slide driving motor; 15. Balance cylinder; 16. Pulling and pressing reaction plate; 17. Double-layer connecting belt locking cylinder. Detailed implementation manners

[0027] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0028] As Figures 1 to 5 shown, the casing equipment for the stator-rotor combined casing synchronous pulling and pressing rotor ball bearing of the present utility model includes: a motor housing gripper 1, an alignment pulling and pressing structure 2, a pulling and pressing reaction mechanism 3, a casing horizontal slide 4, and a casing vertical slide 5.

[0029] Specifically, the casing horizontal slide 4 is used to send the motor housing sub-assembly (including the stator 12) and the reducer sub-assembly (including the rotor shaft 11) into the casing equipment; the motor housing gripper 1 is located above the casing horizontal slide 4 and is used to grip the motor sub-assembly; at the same time, the motor housing gripper 1 is connected to the casing vertical slide 5 and is driven by the vertical slide driving motor 14, and the up-and-down casing and pulling and pressing actions of the motor sub-assembly and the reducer sub-assembly can be realized through the casing vertical slide 5.

[0030] Among them, the closing vertical slide 5 is a double-layer structure, the outer structure of the closing vertical slide 5 is connected to the vertical slide drive motor 14, and the inner structure of the closing vertical slide 5 is connected to the straightening tension and compression structure 2; and a double-layer connecting locking cylinder 17 is provided on the closing vertical slide 5, and the two layers of the slide are combined into one when the double-layer connecting locking cylinder 17 is locked; when the double-layer connecting locking cylinder 17 is unlocked, the tension and compression electric cylinder 13 hooks the rotor shaft 13 with the straightening tension and compression structure 2 and starts to pull and compress upward.

[0031] The straightening and pulling and pressing structure 2 is located above the center of the motor housing gripper 1, and the upper end of the straightening and pulling and pressing structure 2 is fixedly connected to the pulling and pressing electric cylinder 13. During the stator and rotor assembly process, a side suction force is generated, and the straightening and pulling and pressing structure 2 is used to straighten the rotor shaft 11 to keep it vertical to prevent side suction.

[0032] like Figures 3 to 5 As shown, the straightening and tension-compression structure 2 comprises a straightening top 9, a tension-compression straightening rod 6 and a tension-compression pressure head 7; utilizing the rotor's own characteristics, the tension-compression straightening rod 6 is screwed into the rotor shaft 11, and a straightening center hole is designed at the end of the tension-compression straightening rod 6, which can meet the rotor straightening requirements and realize the tension-compression bearing function when the stator and rotor are assembled.

[0033] Among them, the pulling and pressing head 7 is located at the center of the motor housing gripper 1, and the lower end of the pulling and pressing head 7 conflicts with the bearing 10 installed in the motor housing subassembly; when the rotor shaft 11 is lifted, the bearing 10 installed in the motor housing is pressed tightly, and the bearing 10 is pressed back into the rotor shaft.

[0034] The tension and pressure straightening rod 6 passes through the tension and pressure head 7 and is threadedly connected to the rotor shaft 11; the upper end of the straightening rotor shaft 11 is used in conjunction with the tension and pressure electric cylinder 13 to pull the rotor shaft 11 upward.

[0035] The straightening top 9 is located on the tension and pressure straightening rod 6, and the straightening top 9 extends out to support the upper end of the tension and pressure straightening rod 6, so as to keep the rotor in a vertical state when the box is closed.

[0036] In addition, the upper end of the tension and compression straightening rod 6 has a horizontal step, and the straightening and tensioning structure 2 is provided with a horizontal groove 8 matching the horizontal step; when the tension and compression straightening rod 6 is threadedly connected to the rotor shaft 11, when the horizontal slide 4 moves from the upper material position to the upper closing position with the closing box, the horizontal step and the horizontal groove 8 fit together, so that the straightening and tensioning structure 2 can perform the tension and compression straightening process on the rotor shaft 11.

[0037] like Figure 1 , Figure 2 As shown, the tension and compression reaction mechanism 3 is installed on the upper part of the box closing equipment and is located above the straightening tension and compression structure 2; during tension and compression, the tension and compression reaction mechanism 3 is used to resist the pressing force, and a balancing cylinder 15 is provided above the tension and compression reaction mechanism 3.

[0038] Among them, a pair of tension-compression reaction plates 16 extending in the vertical direction are provided on the straightening tension-compression structure 2. The pair of tension-compression reaction plates 16 are symmetrically arranged with respect to the tension-compression straightening rod 6. The lower ends of the tension-compression reaction plates 16 are connected to the mounting plate where the tension-compression head 7 is located, and the upper ends of the tension-compression reaction plates 16 abut against the tension-compression reaction mechanism 3. When grasping the motor assembly, the tension-compression reaction plates 16 are in a non-acting state; during tension-compression, the tension-compression reaction plates 16 extend out to abut against the sliding table and are in a state of being subjected to force.

[0039] When the tension-compression electric cylinder 13 drives the tension-compression straightening rod 6 to move upward, the tension-compression reaction mechanism 3 keeps the position of the tension-compression head 7 fixed through the tension-compression reaction plates 16 and abuts against the inner ring of the bearing 10, further causing the inner ring of the bearing 10 to move relative to the rotor shaft 11 to achieve interference fit.

[0040] It should be noted that when the internal threaded hole space of the rotor journal meets the requirements, a shrink-fit structure can be used for tension-compression to replace the threaded fit structure and reduce the operation of screwing the tension-compression straightening rod into the thread; that is, the lower end of the tension-compression straightening rod is connected to the rotor shaft through a shrink-fit structure.

[0041] The working principle and working process of the box-assembling device for synchronously tension-compressing the rotor ball bearing of the stator and rotor of the present utility model are briefly described below.

[0042] S1: Place the small motor housing assembly containing the stator and the bearing at the feeding position of the horizontal sliding table and automatically feed it to the box-assembling position;

[0043] S2: The vertical sliding table for box-assembling descends to the grasping position. After the motor housing gripper grasps the small motor assembly, it returns to the original position to make room for the small reducer assembly;

[0044] S3: The rotor tension-compression straightening mechanism descends to the working position;

[0045] S4: Place the small reducer assembly containing the rotor shaft at the feeding position of the horizontal sliding table. Screw the tension-compression straightening rod onto the rotor and then automatically feed it to the box-assembling position. At the same time, the tension-compression straightening rod on the rotor slides into the groove of the tension-compression straightening mechanism to cooperate with each other to achieve the reverse pulling action;

[0046] S5: The center point in the tension-compression straightening mechanism extends out to abut against the tension-compression straightening rod to keep the rotor always in a vertical state during box-assembling;

[0047] S6: The vertical sliding table drives the small motor assembly to descend to the tension-compression position. At this time, the stator and rotor have been box-assembled, and there is a distance of 13 mm reserved between the joint surfaces of the motor housing and the reducer housing;

[0048] S7: The tension-compression reaction mechanism extends out to abut against the reaction plate on the upper and lower sliding tables;

[0049] S8: The servo vertical slide is fixed. The double-layer connecting belt-locked cylinder on the slide is unlocked and follows. The pulling and pressing cylinder hooks the rotor with the centering pulling and pressing structure and pulls it upward to start pulling and pressing. The pressure head on the vertical slide presses against the inner ring of the ball bearing on the motor sub-assembly, pulls and presses the rotor into the bearing. During the reverse pulling process, the rotor does not disengage from the input shaft and maintains the positioning state. The pulling and pressing reaction force is transmitted to the C-shaped fuselage by the reaction force plate, and the upper and lower slides are not stressed;

[0050] S9: The double-layer connecting belt-locked cylinder on the slide is locked, and the two layers of the slide are combined into one;

[0051] S10: The servo vertical slide descends to the mating surface of the two housings to complete the mating of the housings;

[0052] S11: All mechanisms return to the original position state.

[0053] The present invention realizes the mating of the stator and rotor and simultaneously completes the function of pressing the rotor bearing through the cooperation of the above-mentioned multiple mechanisms, avoiding the bearing outer ring being stressed and resulting in poor bearings caused by first pressing the bearing on the rotor shaft and then mating the housings. The overall structure is compact, occupies little space, completes the pressing while completing the mating process, and the process combination reduces the assembly cost, avoiding the bearing outer ring being stressed and resulting in poor bearings caused by first pressing the bearing on the rotor shaft and then mating the housings.

[0054] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A stator-rotor assembly equipment for synchronously pulling and pressing rotor ball bearings, characterized in that: It comprises a motor housing gripper (1), a straightening and pulling and pressing structure (2), a pulling and pressing reaction force mechanism (3) and a pulling and pressing electric cylinder (13); the motor housing gripper (1) is used to grasp a small motor housing assembly including a stator (12); The straightening and pulling and pressing structure (2) comprises a pulling and pressing straightening rod (6) and a pulling and pressing head (7); the pulling and pressing head (7) is located at the center of the motor housing gripper (1), and the lower end of the pulling and pressing head (7) abuts against a bearing (10) installed in the motor housing subassembly; and the pulling and pressing straightening rod (6) passes through the pulling and pressing head (7) and is detachably fixedly connected to the rotor shaft (11); The tension-compression straightening rod (6) moves with the tension-compression electric cylinder (13) to drive the rotor shaft (11) to move upward, and the mounting plate where the tension-compression head (7) is located is connected to a tension-compression reaction plate (16) extending in the vertical direction, and the tension-compression reaction mechanism (3) supports the upper end of the tension-compression reaction plate (16) to press the bearing (10) back into the rotor shaft (11).

2. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: The motor housing gripper (1) is slidably connected to the frame of the closing device via a closing vertical slide (5), and the closing vertical slide (5) is a double-layer structure on which a double-layer connecting cylinder with a lock is provided.

3. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 2 is characterized in that: The motor housing gripper (1) is driven by a vertical slide drive motor (14).

4. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: A housing closing horizontal slide (4) is provided below the motor housing gripper (1) for delivering the motor housing subassembly including the stator (12) and the reducer subassembly including the rotor shaft (11) into the housing closing device.

5. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: The upper end of the tension and compression straightening rod (6) is provided with a horizontal step, and the straightening tension and compression structure (2) is provided with a horizontal groove (8) matching the horizontal step.

6. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: The straightening and tensioning structure (2) also includes a straightening top (9), and the straightening top (9) extends out to support the upper end of the tensioning and compression straightening rod (6) to keep the rotor in a vertical state when the box is closed.

7. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: The tension and compression reaction mechanism (3) is installed on the upper part of the box closing device and is located above the straightening tension and compression structure (2).

8. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: A pair of tension and compression reaction plates (16) are symmetrically arranged about the tension and compression straightening rod (6).

9. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: The lower end of the tension and compression straightening rod (6) is fixedly connected to the rotor shaft (11) via an expansion sleeve structure.

10. The stator-rotor assembly and synchronously tension-press rotor ball bearing assembly device according to claim 1 is characterized in that: The tension and compression head (7) and the rotor shaft (11) are fixedly connected by threaded engagement.

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