Rotor core pressing tool for magnetic steel assembly
By designing a rotor core clamping fixture for magnet assembly, and using a base plate, pressure plate, and locking assembly to fix the rotor core, the problem of lamination warping and springing apart during magnet assembly was solved, ensuring the stability of motor performance and quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-25
- Publication Date
- 2026-03-20
AI Technical Summary
When assembling magnets, the laminations of the rotor core are prone to warping or springing apart, which leads to an increase in core thickness, a decrease in magnetic conductivity, and may even cause the core to fall apart, affecting motor performance and quality.
A rotor core clamping fixture for assembling magnets is adopted, including a base plate and a pressure plate, which are connected by a locking assembly. The positioning protrusion and locking bolts fix the rotor core to prevent lamination displacement and ensure the smooth progress of the magnet assembly process.
It effectively prevents the rotor core from warping and springing apart during magnet assembly, ensuring product quality, avoiding increased core thickness and lamination breakage, and ensuring the stability of motor performance and the normal progress of the assembly process.
Smart Images
Figure CN224021594U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to rotor core assembly technical field especially relates to a rotor core compression tool for magnetic steel assembly. BACKGROUND
[0002] In order to improve the magnetic flux density of motor rotor and reduce the magnetic resistance, thereby improving the efficiency and power density of motor, the rotor core adopts the lamination structure, that is, the punching sheet (silicon steel sheet) that constitutes the rotor core is closely stacked together according to the specific order and shape. When the permanent magnet (magnetic steel) is assembled into the magnetic steel slot of the lamination rotor core, the following problems will occur:
[0003] Since the motor rotor core is stacked by punching sheet, and each punching sheet is fixed by the buckle point of riveting process, the degree of firmness is not high. Therefore, when assembling the magnetic steel manually, the large magnetic force of the magnetic steel often causes the punching sheet to be warped and popped out.
[0004] This will cause the thickness of the iron core after the magnetic steel is fixed by glue to increase, the overall thickness and volume of the rotor core to increase and the internal gap to exist, thereby the magnetic conductivity is weakened, the core loss is increased, and finally the motor performance is affected. Moreover, after the number of magnetic steel assembly is large, the punching sheet may be directly scattered and popped out, which directly causes the rotor core to be scrapped and unable to assemble the motor rotor. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a rotor core compression tool for magnetic steel assembly, which can clamp the rotor core during the assembly of the magnetic steel, thereby avoiding the warping and popping out of the punching sheet, and ensuring the normal and orderly progress of the product quality and assembly process.
[0006] The technical scheme for solving the above technical problem of the utility model is: a rotor core compression tool for magnetic steel assembly, comprising a bottom plate and a pressing plate coaxially arranged from bottom to top, the bottom plate and the pressing plate are both horizontally arranged, and the opposite surfaces of the bottom plate and the pressing plate are both provided with positioning protrusions for positioning and installing the rotor core, the bottom plate and the pressing plate are detachably locked and connected through a locking assembly, and the plate surface of the pressing plate is further provided with a plurality of installation openings corresponding to the magnetic steel slots.
[0007] As a further improvement of the utility model, the two positioning protrusions are both cylindrical and are respectively arranged at the shaft centers of the plate surfaces of the bottom plate and the pressing plate.
[0008] As a further improvement of the utility model, the two side outer walls of the positioning protrusion are both vertically provided with positioning clamping grooves.
[0009] As a further improvement of the utility model, the locking assembly comprises a plurality of vertically arranged edge locking bolts, the edge locking bolts all sequentially pass through the bottom plate and the pressing plate from bottom to top, and the plurality of edge locking bolts are arranged outside the mounting opening around the shaft center of the bottom plate and the pressing plate, and a plurality of nuts corresponding to the edge locking bolts and in threaded connection are further arranged above the pressing plate.
[0010] As a further improvement of the utility model, the locking assembly further comprises a vertically arranged center locking bolt, the center locking bolt sequentially passes through the bottom plate, the positioning protrusion and the pressing plate from bottom to top, and a nut in threaded connection with the center locking bolt is further arranged above the pressing plate.
[0011] As a further improvement of the utility model, a gasket is further sleeved on the center locking bolt between the nut and the pressing plate.
[0012] As a further improvement of the utility model, the gasket is a tapered gasket with a cross-sectional area gradually expanding from top to bottom.
[0013] As a further improvement of the utility model, the upper part of the side wall of the mounting opening is provided with a avoiding step.
[0014] Advantages
[0015] Compared with the prior art, the utility model has the advantages that:
[0016] 1. The positioning protrusion arranged on the opposite surface of the bottom plate and the pressing plate can conveniently and quickly position and assemble the rotor core between the bottom plate and the pressing plate, and the locking effect of the locking assembly on the bottom plate and the pressing plate can press the punching sheet constituting the rotor core and avoid the punching sheet from being randomly displaced; thus, the magnetic steel assembly through the tool can effectively prevent the rotor core from being warped and popped during the magnetic steel assembly process, so that the rotor core thickness does not increase after the magnetic steel is glued and fixed, and the punching sheet is not directly scattered and popped due to a large number of magnetic steel assemblies, thereby ensuring the product quality and the normal and orderly assembly process.
[0017] The utility model will become more clear through the following description and in conjunction with the drawings, and the drawings are used to explain the embodiments of the utility model. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below are only some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.
[0019] Fig. 1 The exploded view for use of the present application;
[0020] Fig. 2 The perspective view for use of the present application;
[0021] Fig. 3 The sectional view for use of the present application.
[0022] 1 - bottom plate; 2 - positioning protrusion; 3 - positioning slot; 4 - pressing plate; 5 - installation opening; 6 - avoiding step; 7 - edge locking bolt; 8 - center locking bolt; 9 - conical pad; 10 - rotor core; 11 - nut. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical scheme and advantages of the present application more clear, the following will further describe the present application in detail with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0024] In the description of the present application, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected. Of course, it can also be mechanically connected, or electrically connected. In addition, it can also be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.
[0025] The embodiments of the present application will now be described with reference to the drawings.
[0026] EMBODIMENT
[0027] The specific embodiments of the present application are as follows Figs. 1-3As shown, a rotor core pressing tool for magnetic steel assembly comprises a bottom plate 1 and a pressing plate 4 coaxially arranged from bottom to top, both of which are horizontally arranged, and the opposite surfaces of the bottom plate 1 and the pressing plate 4 are both provided with positioning lugs 2 for positioning and installing a rotor core 10. The bottom plate 1 and the pressing plate 4 are detachably connected through a locking assembly. The surface of the pressing plate 4 is also provided with a plurality of installation openings 5 corresponding to the magnetic steel grooves.
[0028] When the tool is used to assemble the rotor core, the bottom plate 1 is first placed horizontally, and the rotor core 10 is positioned and sleeved on the positioning lugs 2 through the plug-in cooperation of the positioning lugs 2 on the bottom plate 1 and the lower part of the inner hole of the rotor core 10; then, the pressing plate 4 is positioned and covered above the rotor core 10 through the plug-in cooperation of the positioning lugs 2 on the lower surface of the pressing plate 4 and the upper part of the inner hole of the rotor core 10; after that, the bottom plate 1 and the pressing plate 4 are locked by the locking assembly, thereby completing the locking and fixing of the tool to the rotor core; then, the magnetic steel is installed into the magnetic steel grooves of the rotor core 10 through the installation openings 5 reserved on the pressing plate 4; finally, the glue is injected into the magnetic steel grooves through the installation openings 5, thereby completing the injection of the glue.
[0029] The tool can conveniently and quickly position and assemble the rotor core 10 between the bottom plate 1 and the pressing plate 4 through the positioning lugs 2 arranged on the opposite surfaces of the bottom plate 1 and the pressing plate 4. At the same time, through the locking effect of the locking assembly on the bottom plate 1 and the pressing plate 4, the punching sheets constituting the rotor core 10 can be pressed tightly to avoid the punching sheets from being displaced randomly. Therefore, through the tool for magnetic steel assembly, the rotor core 10 can be effectively prevented from being warped and popped out during the magnetic steel assembly process, so that the rotor core 10 will not increase in thickness after the magnetic steel is glued and fixed, and the punching sheets will not be directly scattered and popped out due to the large number of magnetic steel assemblies, thereby ensuring the product quality and the normal and orderly progress of the assembly process.
[0030] In order to position and install the rotor core 10, both of the positioning lugs 2 are cylindrical and are arranged at the axial centers of the surfaces of the bottom plate 1 and the pressing plate 4. At the same time, the positioning lugs 2 are both vertically provided with positioning clamping grooves 3 on the outer walls of the two sides. The positioning clamping grooves 3 cooperate with the key grooves of the inner hole of the rotor core 10, which can avoid the axial rotation of the punching sheets of the rotor core 10 on the positioning lugs 2, thereby affecting the alignment of the magnetic steel grooves and the installation openings 5, and further ensuring the product quality.
[0031] Regarding the locking assembly, the locking assembly comprises a plurality of vertically arranged edge locking bolts 7. The threaded ends of the edge locking bolts 7 pass through the bottom plate 1 and the pressing plate 4 in sequence from bottom to top, and a plurality of nuts 11 corresponding to the edge locking bolts 7 are arranged above the pressing plate 4 and are threadedly connected with the edge locking bolts 7. The plurality of edge locking bolts 7 are arranged outside the mounting opening 5 around the axis of the bottom plate 1 and the pressing plate 4. Meanwhile, the locking assembly further comprises a vertically arranged center locking bolt 8. The center locking bolt 8 is arranged in parallel with the edge locking bolts 7. The center locking bolt 8 passes through the bottom plate 1, the positioning block 2 and the pressing plate 4 in sequence from bottom to top, and a nut 11 threadedly connected with the center locking bolt 8 is arranged above the pressing plate 4. Through the locking of the edge locking bolts 7 and the center locking bolt 8, the rotor core can be firmly clamped between the bottom plate 1 and the pressing plate 4, which is simple and convenient to use and has high reliability.
[0032] In the embodiment, a gasket is sleeved on the center locking bolt 8 between the nut 11 and the pressing plate 4. In the embodiment, the gasket is a tapered gasket 9 with a cross-sectional area gradually increasing from top to bottom. By arranging the tapered gasket 9 on the center locking bolt 8, the pressing area and effect of the center part can be increased, and the possibility of the rotor core 10 punching sheet being bounced away can be reduced.
[0033] In addition, the upper part of the side wall of the mounting opening 5 is provided with an avoiding step 6. By arranging the avoiding step 6, the worker can vertically assemble the magnetic steel into the magnetic steel groove by clamping the magnetic steel with the explosion-proof clamp during the manual assembly of the magnetic steel. In this process, the avoiding step 6 can reserve operation space for the explosion-proof clamp, thereby ensuring the assembly quality.
[0034] It should be noted that:
[0035] The bottom plate 1, the positioning block 2, the pressing plate 47 and the tapered gasket 9 in the tool are all made of aluminum; the edge locking bolts 7, the center locking bolt 8 and the nuts 11 are all made of stainless steel. In this way, the influence of the strong magnetic force during the assembly of the magnetic steel can be greatly reduced.
[0036] The above describes the utility model in combination with the best embodiment, but the utility model is not limited to the above disclosed embodiments, and should cover various modifications, equivalent combinations according to the essence of the utility model.
Claims
1. A rotor core clamping fixture for assembling magnets, characterized in that, It includes a base plate (1) and a pressure plate (4) arranged coaxially from bottom to top. Both the base plate (1) and the pressure plate (4) are horizontally arranged, and the opposite surfaces of the base plate (1) and the pressure plate (4) are provided with positioning protrusions (2) for positioning and installing the rotor core (10). The base plate (1) and the pressure plate (4) are detachably locked together by a locking assembly. The plate surface of the pressure plate (4) is also provided with multiple installation openings (5) corresponding to the magnet slots. The upper part of the side walls on both sides of the installation openings (5) is provided with clearance steps (6).
2. The rotor core clamping fixture for assembling magnets according to claim 1, characterized in that, Both positioning protrusions (2) are cylindrical and are respectively located at the center of the plate surface of the base plate (1) and the pressure plate (4).
3. The rotor core clamping fixture for assembling magnets according to claim 2, characterized in that, The positioning protrusion (2) has vertical positioning slots (3) on both outer walls.
4. The rotor core clamping fixture for assembling magnets according to claim 2 or 3, characterized in that, The locking assembly includes multiple vertically arranged edge locking bolts (7). The edge locking bolts (7) pass through the base plate (1) and the pressure plate (4) from bottom to top. The multiple edge locking bolts (7) are arranged around the axis of the base plate (1) and the pressure plate (4) on the outside of the mounting port (5). The pressure plate (4) is also provided with multiple nuts (11) that correspond one-to-one with the edge locking bolts (7) and are threadedly connected.
5. The rotor core clamping fixture for assembling magnets according to claim 4, characterized in that, The locking assembly also includes a vertically arranged central locking bolt (8), which passes through the base plate (1), the positioning protrusion (2) and the pressure plate (4) from bottom to top. A nut (11) is also provided above the pressure plate (4) to be threadedly connected to the central locking bolt (8).
6. The rotor core clamping fixture for assembling magnets according to claim 5, characterized in that, A pad is also fitted on the center locking bolt (8) between the nut (11) and the pressure plate (4).
7. The rotor core clamping fixture for assembling magnets according to claim 6, characterized in that, The pad is a conical pad with a cross-sectional area that gradually increases from top to bottom (9).