Rotor shaft, rotor core and commutator press-fit device

Abstract

The utility model belongs to the technical field of motor manufacturing, and particularly relates to a rotor shaft, rotor core and commutator press-fitting device, comprising a workbench, a positioning seat is provided on the workbench, a positioning hole is provided on the positioning seat which is open upward and used to place the commutator, a clearance hole is provided at the lower end of the positioning hole which extends in the up-down direction, the clearance hole is connected with the positioning hole, at least four guide columns extending upward are provided on the positioning seat, a lifting plate and a pressing plate are slidably provided on the guide columns, the pressing plate is connected to the press and is provided with a pressure head for pressing down the rotor shaft, the lifting plate is located below the pressure plate, the lifting plate is elastically supported on the workbench, a positioning groove is provided on the lifting plate for positioning the rotor core, the center of the positioning groove is coaxially arranged with the pressure head and the positioning block, and the bottom of the positioning groove is provided with a through hole which penetrates up and down. The utility model has the advantages of realizing the press-fitting of the three at one time and ensuring the press-fitting accuracy.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor manufacturing, and particularly relates to a rotor shaft, a rotor core and a commutator press-fitting device. Background Art

[0002] Chinese patent application number 201821830939.0 discloses a rotor core commutator pressing tool, which presses the rotor core with the rotor shaft downward through a pressing head (piston rod) to press the commutator and the rotor core. The rotor core and the rotor shaft in this solution have been pressed in advance.

[0003] At present, in order to optimize the press-fitting process, it is sometimes necessary to press-fit the rotor shaft, rotor core and commutator at the same time. At this time, whether the press-fitting positioning of the rotor shaft is accurate is mainly determined by the center hole of the rotor core and the accuracy of the pressure head. Some rotor cores with larger diameters and shorter axial lengths have shorter axial lengths of center holes, so the positioning effect of the center hole on the rotor shaft is poor. Therefore, it is necessary to ensure that the accuracy (concentricity) of the pressure head is high and the horizontality of the rotor core is good, so as to ensure that the rotor shaft will not shift. However, in the solution of the above-mentioned patent, the pressure head does not have a positioning guide structure, and its concentricity is poor, which may cause the rotor shaft to shift during press-fitting. Utility Model Content

[0004] The utility model aims to provide a rotor shaft, rotor core and commutator press-fitting device which can press-fit the rotor shaft, rotor core and commutator at one time and ensure the press-fitting accuracy.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a rotor shaft, rotor core and commutator pressing device, including a workbench, a positioning seat is provided on the workbench, a positioning hole is provided on the positioning seat and is open upward and used to place the commutator, a clearance hole is provided at the lower end of the positioning hole and extends in the up and down direction, the clearance hole is connected with the positioning hole, at least four guide columns extending upward are provided on the positioning seat, the guide columns are distributed in a rectangular shape, and a lifting plate and a pressing plate are slidably provided on the guide columns, the pressing plate is connected to the press and is provided with a pressing head for pressing down the rotor shaft, the lifting plate is located below the pressing plate, the lifting plate is elastically supported on the workbench, the lifting plate is provided with a positioning groove for positioning the rotor core, the center of the positioning groove is coaxially arranged with the pressing head and the positioning block, and the bottom of the positioning groove is provided with a through hole penetrating up and down.

[0006] The clearance hole is used to avoid the lower end of the rotor shaft, and the through hole is used for the rotor shaft to pass through. The rectangular distribution means that the guide columns can be enclosed to form a rectangle.

[0007] During the press-fitting process, the operator places the commutator and rotor core in the positioning hole and positioning groove respectively, and then pre-fits the rotor shaft in the center hole of the rotor core. Then, the press is started, and the press moves the pressing plate downward. The pressing plate moves downward on the guide column, and the pressing head contacts the rotor shaft and presses part of the rotor shaft into the rotor core. The pressure on the rotor shaft is transmitted to the rotor core and the lifting plate, and the lifting plate begins to descend. The lower end of the rotor shaft enters the commutator. Finally, when the lifting plate descends and is supported on the positioning seat, the rotor shaft, rotor core and commutator are pressed into place.

[0008] This solution guides the lifting plate and the pressing plate by setting at least four guide columns. At the same time, the rectangular distribution of the guide columns makes the lifting plate and the pressing plate have better horizontality, thereby ensuring that the rotor core on the lifting plate has better horizontality, and the pressure head on the pressing plate has better horizontality, thereby ensuring that the concentricity between the pressure head and the center hole of the rotor core is better, so that the rotor shaft will not deviate when subjected to the pressure of the pressure head, thereby realizing the one-time press-fitting of the rotor shaft, the rotor core with a large diameter and a short axial length, and the commutator.

[0009] Preferably, the positioning groove opens to the front side of the workbench and the cross-sectional shape of the circumferential inner edge of the positioning groove is semicircular, and the through hole opens to the front side of the workbench and passes through the front side wall of the lifting plate.

[0010] The semicircular positioning groove can be used to position the iron core. At the same time, the positioning groove and the through hole are both open to the front side of the workbench, which can facilitate the workpiece to be moved forward and taken out after the press-fitting is completed.

[0011] Preferably, the lifting plate is provided with a clearance groove opening to the front side of the workbench, the through hole is connected to the clearance groove, and the width of the clearance groove gradually decreases from the front side of the workbench to the rear side of the workbench.

[0012] The clearance groove can further facilitate the removal of the workpiece after the press-fitting is completed.

[0013] Preferably, a groove wall of the positioning groove is provided with a radially extending first positioning member, and the first positioning member is used to extend into a slot hole of the rotor core.

[0014] The first positioning member extends into the slot of the rotor core to position the circumferential position of the rotor core.

[0015] Preferably, two second positioning members are arranged on the hole wall of the positioning hole and are adjacent to each other and spaced apart in the circumferential direction, and a space for accommodating a connecting hook of the commutator is formed between the two second positioning members.

[0016] A space for accommodating the connecting hook of the commutator is formed between the two second positioning members, so that when the commutator is placed in the positioning hole, the circumferential position of the commutator can be limited.

[0017] Preferably, the workbench is provided with a first limit member extending upward, and the pressing plate is provided with a second limit member extending downward, and the first limit member and the second limit member can contact each other and limit the maximum distance the pressing plate can descend.

[0018] The first limiting member and the second limiting member can contact each other and limit the maximum distance that the pressing plate descends, thereby preventing the commutator from being damaged due to excessive press-fitting of the rotor shaft.

[0019] Preferably, an adjusting member extending in the up-down direction is provided between the first limiting member and the second limiting member, and the adjusting member is threadedly engaged with the first limiting member or the second limiting member.

[0020] The adjusting member can change the maximum distance that the pressing plate descends when the first limiting member contacts the second limiting member, thereby being applicable to the press-fitting of rotor shafts, commutators and rotor cores of different models, and having better versatility.

[0021] Preferably, the lifting plate is provided with a notch for giving way to the first limiting member and the second limiting member.

[0022] The lifting plate is provided with a notch to make way for the first limiting member and the second limiting member, thereby making the structure of the device more compact.

[0023] Preferably, the outer sleeve of the guide rod is provided with a spring, and the spring elastically supports the lifting plate.

[0024] The arrangement of the spring sleeve on the outside of the guide rod is simpler and convenient for taking out the workpiece after the press-fitting is completed and resetting the lifting plate.

[0025] The utility model has the advantages that the rotor shaft, the rotor core and the commutator can be press-fitted at one time and the press-fitting accuracy can be ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 It is a schematic diagram of the structure of the press fitting.

[0028] Figure 3 It is a schematic diagram of the structure at the lifting plate.

[0029] Figure 4 It is a schematic diagram of the structure of the positioning seat equipped with a commutator.

[0030] Figure 5 It is a structural schematic diagram of the positioning seat.

[0031] Figure 6 for Figure 2 sectional view of .

[0032] Figure numbers: 1, press; 11, pressing head; 2, workbench; 21, guide column; 3, positioning seat; 31, positioning hole; 32, second positioning member; 33, clearance hole; 4, lifting plate; 41, positioning plate; 42, positioning groove; 43, first positioning member; 44, through hole; 5, pressing plate; 6, spring; 71, first limiting member; 72, second limiting member; 73, adjusting member; 100, rotor shaft; 200, rotor core; 300, commutator; 301, connecting hook. DETAILED DESCRIPTION

[0033] The utility model is further described below based on the accompanying drawings and specific embodiments.

[0034] The rotor core 200 in this embodiment has a large diameter and a short axial length.

[0035] like Figure 1 to Figure 2 As shown, this embodiment discloses a rotor shaft, rotor core and commutator press-fitting device, including a press machine 1, a workbench 2 is provided directly below the press machine 1, and four guide columns 21 extending upward are provided on the workbench 2, and the guide columns 21 are distributed on the workbench 2 in a rectangular shape. A positioning seat 3 is also provided on the workbench 2, and the positioning seat 3 is located at the center of the four guide columns 21. A lifting plate 4 and a pressing plate 5 are slidably provided on the four guide columns 21, and the lifting plate 4 is located below the pressing plate 5. A spring 6 is provided between the lifting plate 4 and the workbench 2, and the spring 6 is sleeved on the guide column 21 and elastically supports the lifting plate 4. The pressing plate 5 is fixedly connected to the output end of the press machine 1, and a pressing head 11 is provided at the lower end of the pressing plate 5.

[0036] like Figure 2 , Figure 3 and Figure 6 As shown, a positioning plate 41 is fixed on the lifting plate 4, and the positioning plate 41 has a positioning groove 42 opening to the front side of the workbench 2, and the cross-sectional shape of the circumferential inner edge of the positioning groove 42 is semicircular, and the center of the positioning groove 42 is concentric with the pressure head 11. A radially extending first positioning member 43 is provided on the inner wall of the positioning groove 42, and the first positioning member 43 is used to be inserted into the slot of the rotor core 200 to limit the circumferential position of the rotor core 200. The lifting plate 4 constitutes the bottom of the positioning groove 42, and the lifting plate 4 is provided with a through hole 44 that runs through from top to bottom, and the through hole 44 is connected with the positioning groove 42, and the through hole 44 opens to the front side of the lifting plate 4 and passes through the front side wall of the lifting plate 4. The lifting plate 4 is provided with a clearance groove (not shown in the figure) that runs through from top to bottom, and the clearance groove opens to the front side of the workbench 2, and the width of the clearance groove gradually decreases from the front side of the workbench 2 to the rear side of the workbench 2, and the clearance groove is connected with the through hole 44.

[0037] like Figures 4 to 6As shown, the positioning seat 3 is provided with a positioning hole 31 opening upward, and two groups of radially extending second positioning member groups are provided on the inner wall of the positioning hole 31, each group of second positioning member groups includes two second positioning members 32 arranged adjacently and spaced in the circumferential direction, and a space for accommodating a connecting hook 301 of the commutator 300 is formed between the adjacently spaced second positioning members 32. A clearance hole 33 extending in the up-down direction is provided at the bottom of the positioning hole 31, and the clearance hole 33 is communicated with the positioning hole 31.

[0038] like Figure 2 , Figure 3 and Figure 6 As shown, the workbench 2 is provided with two first stoppers 71 extending upward, and the lower side of the pressing plate 5 is provided with two second stoppers 72 extending downward, and the first stoppers 71 and the second stoppers 72 correspond to each other. The second stoppers 72 are threadedly matched with adjusting members 73, and the lifting plate 4 is provided with notches for giving way to the first stoppers 71, the second stoppers 72 and the adjusting members 73.

[0039] When in use, the operator places the rotor core 200 in the positioning groove 42, the circumferential outer wall of the rotor core 200 contacts and cooperates with the inner wall of the positioning groove 42, and the first positioning member 43 extends into the slot of the rotor core 200 to limit the circumferential position of the rotor core 200. The commutator 300 is placed in the positioning hole 31, and the second positioning member 32 cooperates with the connecting hook 301 to limit the circumferential position of the commutator 300. After that, the rotor shaft 100 is inserted into the center hole of the rotor core 200 to achieve pre-fitting, and the press machine 1 is started to make the pressing plate 5 descend, and the pressing head 11 presses down the rotor shaft 100. After the rotor shaft 100 is partially pressed into the rotor core 200, the lifting plate 4 begins to move downward, and the lower end of the rotor shaft 100 enters the center hole of the commutator 300. When the lifting plate 4 contacts the positioning seat 3, the lifting plate 4 cannot be lowered, and the pressing plate 5 cannot be lowered after the first limiter 71 contacts the adjusting member 73. At this time, the press-fitting of the rotor shaft 100, the rotor core 200 and the commutator 300 is completed. Finally, the press machine 1 is reset, the spring 6 bounces the lifting plate 4, and the commutator 300 extends out of the positioning hole 31. The operator can take the workpiece out of the tooling from the back to the front.

Claims

1. A rotor shaft, rotor core and commutator press-fitting device, comprising a workbench, a positioning seat is provided on the workbench, a positioning hole is provided on the positioning seat and is open upward and is used to place the commutator, a clearance hole is provided at the lower end of the positioning hole and extends in the up-down direction, and the clearance hole is connected with the positioning hole, characterized in that: The positioning seat is provided with at least four guide columns extending upward, and the guide columns are distributed in a rectangular shape. A lifting plate and a pressure plate are slidably mounted on the guide columns. The pressure plate is connected to the press and is provided with a pressure head for pressing down the rotor shaft. The lifting plate is located below the pressure plate, and the lifting plate is elastically supported on the workbench. A positioning groove for positioning the rotor core is provided on the lifting plate, and the center of the positioning groove is coaxially arranged with the pressure head and the positioning block, and a through hole penetrating up and down is provided at the bottom of the positioning groove.

2. The rotor shaft, rotor core and commutator press-fitting device according to claim 1, characterized in that: The positioning groove opens to the front side of the workbench and the cross-section shape of the circumferential inner edge of the positioning groove is semicircular. The through hole opens to the front side of the workbench and passes through the front side wall of the lifting plate.

3. The rotor shaft, rotor core and commutator press-fitting device according to claim 2, characterized in that: The lifting plate is provided with a clearance groove opening to the front side of the workbench, the through hole is communicated with the clearance groove, and the width of the clearance groove gradually decreases from the front side of the workbench to the rear side of the workbench.

4. The rotor shaft, rotor core and commutator press-fitting device according to claim 1, characterized in that: The slot wall of the positioning slot is provided with a radially extending first positioning member, and the first positioning member is used to extend into the slot hole of the rotor core.

5. The rotor shaft, rotor core and commutator press-fitting device according to claim 1, characterized in that: Two second positioning members are arranged adjacent to each other and spaced apart in the circumferential direction on the hole wall of the positioning hole, and a space for accommodating a connecting hook of the commutator is formed between the two second positioning members.

6. The rotor shaft, rotor core and commutator press-fitting device according to any one of claims 1 to 5, characterized in that: The workbench is provided with a first limiter extending upward, and the pressing plate is provided with a second limiter extending downward. The first limiter and the second limiter can contact each other and limit the maximum distance the pressing plate descends.

7. The rotor shaft, rotor core and commutator press-fitting device according to claim 6, characterized in that: An adjusting member extending in the up-down direction is arranged between the first limiting member and the second limiting member, and the adjusting member is threadedly matched with the first limiting member or the second limiting member.

8. The rotor shaft, rotor core and commutator press-fitting device according to claim 6, characterized in that: The lifting plate is provided with a notch for giving way to the first limiting member and the second limiting member.

9. The rotor shaft, rotor core and commutator press-fitting device according to any one of claims 1 to 5, characterized in that: The outer sleeve of the guide column is provided with a spring, and the spring elastically supports the lifting plate.

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