Press fitting device for bearing and fan blade on rotor shaft

Abstract

The utility model belongs to the technical field of motor rotor assembly, and particularly relates to a press fitting device for a bearing and a fan blade on a rotor shaft. A press fitting device for a bearing and a fan blade on a rotor shaft comprises a check block and a pressing block which are arranged in the horizontal direction in a spaced mode, the check block is provided with a receding hole which extends in the horizontal direction to conduct receding on the rotor shaft, the pressing block is provided with a first annular protrusion extending towards the check block side, and the first annular protrusion is used for abutting against the end of the fan blade. The first annular bulge is enclosed to form a positioning hole for positioning a bearing on the fan blade end side of the rotor shaft; a guide column extending in the horizontal direction is arranged between the pressing block and the check block, a movable block is arranged on the guide column in a sliding fit mode, the movable block is provided with a positioning groove which is opened upwards, penetrates through the two sides of the movable block in the horizontal direction and is used for making contact with the outer wall of the rotor iron core, and the movable block is provided with a first limiting column limiting the maximum stroke of movement of the pressing block. The utility model has the advantage of avoiding excessive press fitting of the fan blade, the bearing and the rotor shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor rotor assembly, and particularly relates to a bearing and fan blade press-fitting device on a rotor shaft. Background Art

[0002] The rotor shaft is press-fitted with blades and bearings. The blades are used to dissipate heat. After the bearings are assembled, they are press-fitted with the end covers to achieve rotatable fixation of the rotor shaft and the end covers. Some rotor shafts require press-fit bearings at both ends. The rotor shaft includes a thick section and a thin section. A step is formed between the thick section and the thin section. The step limits the position of the bearings and blades. However, in order to ensure the performance of some motors, the diameter of the rotor shaft cannot be designed to be too thick. This design will make the diameter difference between the thick section and the thin section smaller. When press-fitting the bearings and blades, it is necessary to avoid excessive press-fitting so that the bearings and blades originally located on the thin section are pressed onto the thick section, resulting in the scrapping of the rotor, inability to install with the end cover, or damage to the rotor shaft, bearings and blades.

[0003] A Chinese patent application numbered 201822045547.X discloses a rotor fan blade bearing press-fitting device. However, this solution can only limit the axial position of the rotor shaft by means of a limit block, and it is difficult to avoid the problem of excessive press-fitting of the fan blades and the bearings on the rotor shaft. Utility Model Content

[0004] The utility model aims to provide a bearing and fan blade press-fitting device on a rotor shaft which can avoid excessive press-fitting of the fan blade, the bearing and the rotor shaft.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a bearing and fan blade pressing device on a rotor shaft, comprising a block and a pressing block arranged at intervals in the horizontal direction, the block being provided with a making way hole extending in the horizontal direction to make way for the rotor shaft, the pressing block being provided with a first annular protrusion extending toward the block side, the first annular protrusion being used to abut against the end of the fan blade, the first annular protrusion enclosing a positioning hole for positioning the fan blade end side bearing of the rotor shaft; a guide column extending in the horizontal direction is provided between the pressing block and the block, a moving block is slidably provided on the guide column, the moving block being provided with a positioning groove which opens upward and passes through both sides of the moving block in the horizontal direction and is used to contact the outer wall of the rotor core, the moving block being provided with a first limiting column extending toward the block side, the first limiting column being used to limit the maximum stroke of the pressing block in the horizontal direction.

[0006] The movement of the pressing block can be realized by any existing pushing mechanism such as a cylinder, an electric push rod, etc. The outer wall of the bearing at the end of the fan blade contacts the inner wall of the positioning hole. The positioning groove and the clearance hole are coaxially arranged.

[0007] During use, the operator sets the bearing sleeve on one end of the rotor shaft, then places the rotor in the positioning groove and inserts one end of the rotor shaft into the clearance hole to achieve pre-positioning between the rotor shaft and the stopper, then sets the fan blade sleeve on the other end of the rotor shaft so that there is a pre-positioning between the fan blade and the rotor shaft, and places the bearing on the end side of the fan blade in the positioning hole. After that, the pressing block starts to move so that the first annular protrusion abuts against the end of the fan blade, and the bearing and the rotor shaft begin to have an interference fit. The movement of the pressing block will also cause the moving block to move closer to the stopper; eventually the moving block will contact the stopper, and the first limiting column will contact the pressing block, so that the pressing block cannot continue to move. At this time, the fan blade and the bearing are pressed into place with the rotor shaft.

[0008] This solution sets a first limit column on the moving block to limit the maximum travel of the pressing block, thereby avoiding excessive press-fitting between the rotor shaft and the fan blades and the bearings. At the same time, during press-fitting, the rotor and the moving block can move together, so that the positioning groove of the moving block can always position the rotor core.

[0009] Preferably, the first limiting column is threadably matched with the moving block.

[0010] By screwing the first limit column, the length of the first limit column exposed outside the moving block can be changed, which is convenient for the operator to fine-tune the first limit column to accurately limit the maximum stroke of the pressing block, thereby ensuring that the rotor shaft, bearings and fan blades are not over-pressed.

[0011] Preferably, the stopper is provided with a second annular protrusion extending toward the moving block side, the second annular protrusion is used to abut against the inner ring of the bearing, the inner hole formed by the second annular protrusion is connected to the clearance hole, and the inner wall of the inner hole is used to contact the outer wall of the rotor shaft.

[0012] The rotor shaft can be inserted into the inner hole of the second annular protrusion and the clearance hole. During press-fitting, the second annular protrusion will abut against the inner ring of the bearing, and the rotor shaft will move axially, thereby achieving a tight fit between the bearing and the rotor shaft. Since the inner ring of the bearing is tightly fitted with the rotor shaft, the second annular protrusion abuts against the inner ring of the bearing, which has a better effect during press-fitting and is more convenient for press-fitting of the bearing. At the same time, the inner wall of the inner hole contacts the outer wall of the rotor shaft, thereby positioning the rotor shaft.

[0013] Preferably, the pressing block is provided with a third annular protrusion extending toward the movable plate side, the third annular protrusion is located in the positioning hole and is coaxially arranged with the positioning hole, and the third annular protrusion is used to abut against the inner ring of the bearing on the blade end side of the rotor shaft.

[0014] The third annular protrusion can ensure that the bearing on the end side of the fan blade can be pressed into place with the rotor shaft.

[0015] Preferably, elastic members are provided between the moving block, the stopper block and the pressing block, and the elastic members are sleeved on the guide column.

[0016] The elastic member can help the moving block to reset after the press-fitting is completed, so that the operator can place the next rotor, blades and bearing on the moving block for press-fitting and pre-fitting.

[0017] Preferably, the moving block is provided with a second limiting column extending toward the stop block side.

[0018] The provision of the second limiting column can not only limit the maximum stroke of the pressing block, but also prevent the moving block from contacting with the stopper.

[0019] Preferably, the positioning groove is a V-shaped groove or a semicircular groove.

[0020] V-shaped grooves or semicircular grooves can facilitate the positioning of the rotor core.

[0021] Preferably, the pressure block is matched with a driver, and the pressure block is provided with a limit groove which opens to the driver side and passes through up and down, and the limit groove includes a narrow section and a wide section in sequence from the driver side close to the driver side to the driver side far away from the driver side, and the output end of the driver is provided with a limit member which cooperates with the limit groove, and the limit member includes a thin section and a thick section in sequence from the driver side close to the driver side to the driver side far away from the driver side; the thin section cooperates with the narrow section, and the thick section cooperates with the wide section.

[0022] The narrow section and wide section of the limit groove cooperate with the limit piece of the driver, so that the driver can realize the movement of the pressure block towards or away from the stopper. At the same time, the limit groove runs through the upper and lower parts, so that the limit piece can slide into the limit groove in the upper and lower directions, which is convenient for assembly.

[0023] Preferably, the driver is fixed on a fixed block, one end of the guide column passes through a pressing block and is fixed to the fixed block, and the pressing block is slidably fitted on the guide column.

[0024] The pressing block is also slidably fitted on the guide post, which can further ensure that the first annular protrusion of the pressing block will not deviate during press-fitting.

[0025] The utility model has the following advantages: the first limiting column and the second limiting column are arranged on the moving block to limit the maximum travel of the pressing block, thereby avoiding excessive press-fitting between the rotor shaft and the fan blades and the bearings. At the same time, during press-fitting, the rotor and the moving block can move together, so that the positioning groove of the moving block can always position the rotor core. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 2 It is a structural schematic diagram of the utility model from another perspective.

[0028] Figure 3It is a schematic diagram of the structure of the utility model during press-fitting.

[0029] Figure 4 It is a cross-sectional view of the utility model during press-fitting.

[0030] Figure 5 Schematic diagram of the workpiece structure.

[0031] Figure 6 A cross-sectional view of the workpiece.

[0032] Figure numbers: base plate 1, fixed block 11, stop block 12, make way hole 121, driver 2, limit piece 21, moving block 3, first limit column 31, second limit column 32, positioning groove 33, pressure block 4, limit groove 41, first annular protrusion 5, positioning hole 51, third annular protrusion 52, guide column 6, second annular protrusion 7, first bearing 100, second bearing 101, fan blade 102, rotor shaft 103, rotor core 104. DETAILED DESCRIPTION

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

[0034] like Figure 5 and Figure 6 As shown, the workpiece is the workpiece that needs to be pressed in this solution, including a rotor shaft 103 and a rotor core 104. Bearings need to be pressed in both the left and right ends of the rotor shaft 103. A step structure is provided on the rotor shaft 103, and the step structure limits the axial movement of the bearings and the fan blades. The right end of the rotor shaft 103 needs to be pressed in the fan blade 102, and the bearing on the fan blade end side needs to be pressed in on the right side of the fan blade 102. The bearing on the fan blade end side is hereinafter referred to as the first bearing 100, and another bearing needs to be pressed in on the left end of the rotor shaft, which is hereinafter referred to as the second bearing 101.

[0035] like Figure 1 to Figure 2As shown, this embodiment discloses a bearing and fan blade pressing device on a rotor shaft, comprising a base plate 1, a fixed block 11 and a stopper 12 are fixed on the base plate 1, the fixed block 11 and the stopper 12 are arranged at intervals in the horizontal left and right directions, and a driver 2 is fixed at the left end of the fixed block 11, and the driver 2 is a cylinder. Two guide posts 6 extending in the left and right directions are arranged between the fixed block 11 and the stopper 12, and the two ends of the guide posts 6 are fixedly connected to the fixed block 11 and the stopper 12 respectively. The driving end of the driver 2 is fixedly connected to the pressing block 4, and the guide post 6 passes through the pressing block 4, so that the pressing block 4 and the guide post 6 are slidably matched, and the driver 2 drives the pressing block 4 to move closer to or away from the stopper 12. A moving block 3 is arranged between the pressing block 4 and the stopper 12, and the guide post 6 passes through the moving block 3, and the moving block 3 and the guide post 6 are slidably matched. Elastic members (not shown in the figure) are arranged between the pressing block 4 and the moving block 3 and between the moving block 3 and the stopper 12, and the elastic members are compression springs and are sleeved on the outside of the guide post 6. The moving block 3 is provided with a positioning groove 33 which penetrates both sides of the moving block 3 in the horizontal direction and opens upward. The positioning groove 33 is a V-shaped groove. The groove wall of the positioning groove 33 is used to contact the outer wall of the rotor core 104 to achieve the positioning of the rotor.

[0036] like Figures 1 to 4 As shown, a first limiting column 31 extending toward the side of the pressing block 4 is provided at one end of the moving block 3 facing the pressing block 4, and a second limiting column 32 extending toward the side of the stopper 12 is provided at one end of the moving block 3 facing the stopper 12. The number of the first limiting column 31 and the second limiting column 32 is two, and the first limiting column 31 and the second limiting column 32 are both threadedly matched with the moving block 3. A first annular protrusion 5 extending toward the side of the moving block 3 is provided at one end of the pressing block 4 facing the moving block 3. The first annular protrusion 5 is used to contact the end of the fan blade 102. The first annular protrusion 5 encloses a positioning hole 51 for positioning the first bearing 100. The circumferential inner wall of the positioning hole 51 is used to contact the circumferential outer wall of the first bearing 100. A third annular protrusion 52 extending toward the side of the moving block 3 is also provided in the positioning hole 51. The third annular protrusion 52 is used to abut the inner ring of the first bearing 100. The end of the stopper 12 facing the moving block 3 is provided with a second annular protrusion 7 extending toward the moving block 3, the second annular protrusion 7 is used to abut against the inner ring of the second bearing 101, and the second annular protrusion 7 encloses an inner hole 71, and the inner hole 71 is used to contact the outer wall of the rotating shaft 103. The stopper 12 is also provided with a clearance hole 121 penetrating in the left and right horizontal directions, the clearance hole 121 is used to make way for the rotor shaft 103, and the clearance hole 121 is connected with the inner hole 71 of the second annular protrusion 7 and the two are coaxially arranged.

[0037] like Figure 1 , Figure 3 and Figure 4As shown, the pressing block 4 is provided with a limiting groove 41 which penetrates from top to bottom and opens toward the side of the fixing block 11. The limiting groove 41 includes a narrow section and a wide section in sequence from the side close to the driver 2 to the side far from the driver 2. The output end of the driver 2 is provided with a limiting member 21 which cooperates with the limiting groove 41. The limiting member 21 includes a thin section and a thick section in sequence from the side close to the driver 2 to the side far from the driver 2. The thin section cooperates with the narrow section, and the thick section cooperates with the wide section. The cross sections of the limiting groove 41 and the limiting member 21 are both T-shaped.

[0038] During press fitting, the operator places the rotor on the moving block 3 so that the outer wall of the rotor core 104 contacts the inner wall of the positioning groove 33, and at the same time, the second bearing 101 is sleeved on the rotor shaft 103, and the rotor shaft 103 is inserted into the inner hole 71 of the second annular protrusion 7 to form a pre-match between the second bearing 101 and the rotor shaft 103; the fan blade 102 is sleeved on the rotor shaft 103, and the first bearing 100 is placed in the positioning hole 51 of the first annular protrusion 5, and then the driver 2 is started, so that the pressing block 4 approaches the moving block 3, the first annular protrusion 5 abuts against the end of the fan blade 102, and the pressing block 4 and the moving block 3 move synchronously toward the stopper 12, when the second limiting column 32 contacts the stopper 12, and the first limiting column 31 contacts the pressing block 4, the moving block 3 and the pressing block 4 cannot continue to move, and at this time the fan blade 102, the first bearing 100 and the second bearing 101 are just pressed into place.

Claims

1. A bearing and fan blade press-fitting device on a rotor shaft, comprising a stopper and a press block arranged at intervals in the horizontal direction, wherein the stopper is provided with a clearance hole extending in the horizontal direction to make way for the rotor shaft, characterized in that: The pressure block is provided with a first annular protrusion extending toward the stop block side, the first annular protrusion is used to abut against the end of the fan blade, and the first annular protrusion encloses a positioning hole for positioning the bearing on the end side of the fan blade of the rotor shaft; a guide column extending in the horizontal direction is provided between the pressure block and the stop block, and a moving block is slidably mounted on the guide column, and the moving block is provided with a positioning groove which opens upward and passes through both sides of the moving block in the horizontal direction and is used to contact the outer wall of the rotor core, and the moving block is provided with a first limiting column extending toward the pressure block side, and the first limiting column is used to limit the maximum stroke of the pressure block in the horizontal direction.

2. The bearing and blade press-fitting device on the rotor shaft according to claim 1, characterized in that: The first limiting column is threadably matched with the moving block.

3. The bearing and blade press-fitting device on the rotor shaft according to claim 1, characterized in that: The stopper is provided with a second annular protrusion extending toward the moving block side, the second annular protrusion is used to abut against the inner ring of the bearing, the inner hole enclosed by the second annular protrusion is connected to the clearance hole, and the inner wall of the inner hole is used to contact the outer wall of the rotor shaft.

4. The bearing and blade press-fitting device on the rotor shaft according to claim 1, characterized in that: The pressing block is provided with a third annular protrusion extending toward the movable plate side, the third annular protrusion is located in the positioning hole and is coaxially arranged with the positioning hole, and the third annular protrusion is used to abut against the inner ring of the bearing on the end side of the rotor shaft blade.

5. The bearing and blade press-fitting device on the rotor shaft according to any one of claims 1 to 4, characterized in that: Elastic pieces are arranged between the moving block, the stop block and the pressing block, and the elastic pieces are sleeved on the guide column.

6. The bearing and blade press-fitting device on the rotor shaft according to any one of claims 1 to 4, characterized in that: The moving block is provided with a second limiting column extending toward the stop block side.

7. The bearing and blade press-fitting device on the rotor shaft according to any one of claims 1 to 4, characterized in that: The positioning groove is a V-shaped groove or a semicircular groove.

8. The bearing and blade press-fitting device on the rotor shaft according to any one of claims 1 to 4, characterized in that: The pressing block is matched with a driver, and the pressing block is provided with a limiting groove which opens to the driver side and passes through up and down, and the limiting groove includes a narrow section and a wide section in sequence from the driver side close to the driver side to the driver side far away from the driver side, and the output end of the driver is provided with a limiting member which cooperates with the limiting groove, and the limiting member includes a thin section and a thick section in sequence from the driver side close to the driver side to the driver side far away from the driver side; the thin section cooperates with the narrow section, and the thick section cooperates with the wide section.

9. The bearing and blade press-fitting device on the rotor shaft according to claim 8, characterized in that: The driver is fixed on the fixed block, one end of the guide column passes through the pressing block and is fixed to the fixed block, and the pressing block is slidably fitted on the guide column.

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