Dynamic balance structure of motor rotor

Abstract

The utility model discloses a motor rotor dynamic balance structure, which belongs to the technical field of motor dynamic balance, and comprises a rotor magnetic steel shell and a rotating shaft, the outer wall of the rotating shaft is in threaded connection with a fastening nut positioned on the outer side of a clamping plate, and the inside of a clamping hole is movably connected with a rivet thread sleeve positioned inside a placement groove. A deformation groove is formed in the rivet thread sleeve, a rivet bolt is connected to the interior of the rivet thread sleeve in a threaded mode, and a plurality of balance weight rings are movably connected to the outer wall of the rivet bolt. The counterweight ring is connected to the outer wall of the rivet bolt in a sleeving mode, the rivet bolt is screwed, the rivet bolt enters the rivet thread sleeve, the outer wall of the deformation groove located in the containing groove deforms, the rivet bolt and the counterweight ring are fixed to the clamping plate, the stability of the counterweight is higher, and the service life of the rotor is prolonged; the device has the advantages of being low in dynamic balance machining and debugging difficulty and high in dynamic balance stability.

Description

Technical Field

[0001] The utility model relates to the technical field of motor dynamic balancing, in particular to a motor rotor dynamic balancing structure. Background Art

[0002] With the continuous development of the motor industry, high power and torque density of motors have become the development trend in the industry. In order to achieve the power torque density requirements, it is urgent to increase the speed of the motor. The motor rotor is the main moving part in the motor. Its dynamic balancing accuracy determines the running stability. The motor faces complex environmental conditions such as vibration and high and low temperatures during operation. Its dynamic balancing reliability is particularly important. In addition, the cleanliness and production efficiency of the motor in the production process determine whether the motor can be stably produced in large quantities.

[0003] The existing motor rotor dynamic balancing adopts the "weight removal method". The "weight removal method" is to add very thick dynamic balancing end plates on both sides of the motor rotor core, and realize dynamic balancing weight by drilling and milling the dynamic balancing end plates to remove weight. However, when removing weight, the processing debris is difficult to clean and the dynamic balancing processing and debugging time is long, which not only affects the assembly cleanliness but also reduces the production efficiency;

[0004] The existing motor rotor dynamic balancing can also add counterweights and fix the balancing weights by gluing and screwing them together. However, when the motor is running at high speed, the balancing weights are easily thrown out due to centrifugal force over a long period of time, and the balance is easily destroyed. The dynamic balancing stability and reliability are poor, resulting in a short rotor service life. Utility Model Content

[0005] In order to solve the problems in the above background, the utility model provides a motor rotor dynamic balancing structure, which has the characteristics of low difficulty in dynamic balancing processing and debugging and high dynamic balancing stability.

[0006] The utility model is implemented as follows: a motor rotor dynamic balancing structure comprises a rotor magnetic steel housing and a rotating shaft, wherein the rotating shaft is arranged inside the rotor magnetic steel housing, a plurality of rotor cores which are evenly distributed and located inside the rotor magnetic steel housing are fixedly connected to the outer wall of the rotating shaft, a plurality of metal rods which are distributed in an array are fixedly connected to the inner part of the plurality of rotor cores, two symmetrically distributed fixing plates which are located outside the plurality of rotor cores are fixedly connected to the outer wall of the rotating shaft, a plurality of fixing holes which match the metal rods are opened through the side walls of the two fixing plates, and both ends of the plurality of metal rods extend to the outside of the plurality of fixing holes;

[0007] A balancing mechanism is provided on the outer side of the two fixed plates, and the balancing mechanism includes a mounting groove opened on the side wall of the fixed plate, the outer wall of the rotating shaft is movably connected with a clamping plate located on the outer side of the fixed plate, and the outer wall of the clamping plate is penetrated with a plurality of clamping holes corresponding to the mounting groove, the outer wall of the rotating shaft is threadedly connected with a fastening nut located on the outer side of the clamping plate, the interior of the clamping hole is movably connected with a rivet nut located inside the mounting groove, a deformation groove is opened inside the rivet nut, the interior of the rivet nut is threadedly connected with a rivet bolt, and the outer wall of the rivet bolt is movably connected with a plurality of counterweight rings.

[0008] In order to facilitate the positioning of the clamping plate, as a preferred embodiment of the motor rotor dynamic balancing structure of the utility model, a plurality of positioning holes matching the metal rods are formed through the outer wall of the clamping plate.

[0009] In order to make the clamping plate more secure, as a preferred motor rotor dynamic balancing structure of the utility model, the outer wall of the rotating shaft is movably connected with a washer located between the fastening nut and the clamping plate.

[0010] In order to enable the rivet nut to be clamped on the outside of the clamping plate, as a preferred motor rotor dynamic balancing structure of the utility model, one end of the rivet nut is fixedly connected to a clamping outer edge located on the outside of the clamping plate.

[0011] In order to facilitate deformation of the rivet nut, as a preferred embodiment of the motor rotor dynamic balancing structure of the utility model, the material of the rivet nut is a metal with relatively low hardness.

[0012] In order to facilitate debugging of the rotor, as a preferred embodiment of a motor rotor dynamic balancing structure of the utility model, the numbers of the clamping holes and the placement slots are both even numbers.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model provides a placement groove on the outer side of the fixing plate, and clamps two fixing plates on both sides of a plurality of rotor cores respectively, so that the difficulty of assembling the rotor is lowered and the processing and production efficiency of the rotor is higher;

[0015] The positioning hole is sleeved on the outer wall of the metal rod to facilitate the positioning of the card plate, so that the card hole and the placement groove are aligned, and the gasket is threadedly connected to the outer wall of the rotating shaft through the fastening nut to make the gasket and the card plate in close contact, so that the card plate is fixed more firmly and has stronger stability.

[0016] In addition, the utility model makes it more convenient to install the balancing weight by sleeve-connecting the balancing weight ring to the outer wall of the rivet bolt, and at the same time facilitates the adjustment of the weight of the balancing weight, making the dynamic balancing and debugging of the rotor less difficult;

[0017] The rivet bolt is turned to enter the interior of the rivet nut, so that the outer wall of the deformation groove inside the accommodating groove is deformed, and the rivet bolt and the counterweight ring are fixed on the clamping plate, so that the stability of the balancing weight is stronger and the service life of the rotor is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is an overall structural diagram of a motor rotor dynamic balancing structure of the utility model;

[0019] Figure 2 It is the overall cutaway structural diagram of the utility model;

[0020] Figure 3 It is a partial structural exploded view of the utility model;

[0021] Figure 4 It is a partial structural exploded view of the utility model;

[0022] Figure 5 For this utility model Figure 2 A is the enlarged structural diagram.

[0023] In the figure, 1, rotor magnetic steel shell; 2, rotating shaft; 3, rotor core; 4, fixing plate; 5, clamping plate; 6, fastening nut; 7, washer; 8, metal rod; 9, fixing hole; 10, placement groove; 11, positioning hole; 12, clamping hole; 13, rivet nut; 14, clamping outer edge; 15, rivet bolt; 16, counterweight ring; 17, deformation groove. DETAILED DESCRIPTION

[0024] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercial products unless otherwise specified.

[0025] See also Figure 1-5 A motor rotor dynamic balancing structure includes a rotor magnetic steel housing 1 and a rotating shaft 2. The rotating shaft 2 is arranged inside the rotor magnetic steel housing 1. The outer wall of the rotating shaft 2 is fixedly connected with a plurality of rotor cores 3 which are evenly distributed and located inside the rotor magnetic steel housing 1. A plurality of metal rods 8 distributed in an array are penetrated and fixedly connected inside the plurality of rotor cores 3. The outer wall of the rotating shaft 2 is fixedly connected with two symmetrically distributed fixing plates 4 which are located outside the plurality of rotor cores 3. The side walls of the two fixing plates 4 are penetrated with a plurality of fixing holes 9 which match the metal rods 8. Both ends of the plurality of metal rods 8 extend to the outside of the plurality of fixing holes 9.

[0026] A balancing mechanism is provided on the outer side of the two fixed plates 4, and the balancing mechanism includes a placement groove 10 opened on the side wall of the fixed plate 4, the outer wall of the rotating shaft 2 is movably connected with the clamping plate 5 located on the outer side of the fixed plate 4, and the outer wall of the clamping plate 5 is penetrated with a plurality of clamping holes 12 corresponding to the placement groove 10, the outer wall of the rotating shaft 2 is threadedly connected with the fastening nut 6 located on the outer side of the clamping plate 5, the interior of the clamping hole 12 is movably connected with the rivet screw sleeve 13 located inside the placement groove 10, the interior of the rivet screw sleeve 13 is provided with a deformation groove 17, the interior of the rivet screw sleeve 13 is threadedly connected with the rivet bolt 15, and the outer wall of the rivet bolt 15 is movably connected with a plurality of counterweight rings 16.

[0027] In this embodiment: by opening a placement groove 10 on the outer side of the fixing plate 4, the two fixing plates 4 are respectively clamped on both sides of the plurality of rotor cores 3, so that the difficulty of assembling the rotor is lower and the processing and production efficiency of the rotor is higher; by sleeved on the outer wall of the metal rod 8 through the positioning hole 11, it is convenient to position the clamping plate 5, so that the clamping hole 12 and the placement groove 10 are aligned, and the fastening nut 6 is threadedly connected to the outer wall of the rotating shaft 2, so that the washer 7 is in close contact with the clamping plate 5, so that the clamping plate 5 is fixed more firmly and has stronger stability; by sleeved on the outer wall of the rivet bolt 15 through the counterweight ring 16, the installation of the balancing weight is more convenient, and the weight of the counterweight is conveniently adjusted, so that the dynamic balancing debugging of the rotor is less difficult; the rivet bolt 15 is screwed, so that the rivet bolt 15 enters the interior of the rivet nut 13, so that the outer wall of the deformation groove 17 located inside the placement groove 10 is deformed, and the rivet bolt 15 and the counterweight ring 16 are fixed on the clamping plate 5, so that the stability of the balancing weight is stronger and the service life of the rotor is increased.

[0028] As a technical optimization solution of the utility model, a plurality of positioning holes 11 matching the metal rods 8 are formed through the outer wall of the clamping plate 5 .

[0029] In this embodiment, the positioning hole 11 is sleeved on the outer wall of the metal rod 8, so as to facilitate the positioning of the mounting plate 5, align the mounting hole 12 with the placement groove 10, and make the operation simpler.

[0030] As a technical optimization solution of the utility model, the outer wall of the rotating shaft 2 is movably connected with a washer 7 located between the fastening nut 6 and the clamping plate 5 .

[0031] In this embodiment, the washer 7 is brought into close contact with the mounting plate 5 by tightening the nut 6 , so that the mounting plate 5 is more firmly fixed and has greater stability.

[0032] As a technical optimization solution of the utility model, one end of the rivet nut 13 is fixedly connected to a clamping outer edge 14 located outside the clamping plate 5 .

[0033] In this embodiment, the rivet nut 13 is more easily clamped in the clamping hole 12 by the clamping outer edge 14 , thereby preventing the rivet nut 13 from falling into the accommodating groove 10 .

[0034] As a technical optimization solution of the present invention, the material of the rivet screw sleeve 13 is a metal with relatively low hardness.

[0035] In this embodiment, the outer wall of the deformation groove 17 of the rivet nut 13 is made to deform more easily, so that the dynamic balancing and debugging operation of the rotor is simpler.

[0036] As a technical optimization solution of the present invention, the number of the mounting holes 12 and the placement slots 10 are both even numbers.

[0037] In this embodiment: it is convenient to debug the dynamic balance of the rotor.

[0038] The working principle and use process of this utility model:

[0039] First, the positioning hole 11 is sleeved on the outer wall of the metal rod 8 to position the clamping plate 5 so that the clamping hole 12 and the placement groove 10 are aligned, and then the washer 7 is sleeved on the outer wall of the rotating shaft 2 and threadedly connected to the outer wall of the rotating shaft 2 by the fastening nut 6, so that the washer 7 is in close contact with the clamping plate 5, so that the clamping plate 5 is fixed more firmly and has stronger stability.

[0040] Next, place the rivet nut sleeve 13 into the clamping hole 12 on the side to be debugged, so that the clamping outer edge 14 is in close contact with the clamping plate 5, and the rivet nut sleeve 13 enters the interior of the placement groove 10. Then, according to the weight, different sizes and quantities of counterweight rings 16 are sleeved on the outer wall of the rivet bolt 15, and then the rivet bolt 15 is screwed to make the rivet bolt 15 enter the interior of the rivet nut sleeve 13, so that the outer wall of the deformation groove 17 located inside the placement groove 10 is deformed, and the rivet bolt 15 and the counterweight ring 16 are fixed to the clamping plate 5 to complete the fixation of the balancing weight.

[0041] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0042] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the patent of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A motor rotor dynamic balancing structure, comprising a rotor magnetic steel housing (1) and a rotating shaft (2), characterized in that: The rotating shaft (2) is arranged inside the rotor magnetic steel housing (1); the outer wall of the rotating shaft (2) is fixedly connected with a plurality of rotor cores (3) which are evenly distributed and located inside the rotor magnetic steel housing (1); a plurality of metal rods (8) distributed in an array are fixedly connected through the interior of the plurality of rotor cores (3); the outer wall of the rotating shaft (2) is fixedly connected with two fixing plates (4) which are symmetrically distributed and located outside the plurality of rotor cores (3); the side walls of the two fixing plates (4) are both penetrated with a plurality of fixing holes (9) which match the metal rods (8); and both ends of the plurality of metal rods (8) extend to the outside of the plurality of fixing holes (9); The outer sides of the two fixing plates (4) are both provided with a balancing mechanism, the balancing mechanism comprising a placement groove (10) provided on the side wall of the fixing plate (4), the outer wall of the rotating shaft (2) being movably connected with a clamping plate (5) located on the outer side of the fixing plate (4), the outer wall of the clamping plate (5) being provided with a plurality of clamping holes (12) corresponding to the placement groove (10), the outer wall of the rotating shaft (2) being threadedly connected with a fastening nut (6) located on the outer side of the clamping plate (5), the interior of the clamping hole (12) being movably connected with a rivet screw sleeve (13) located inside the placement groove (10), the interior of the rivet screw sleeve (13) being provided with a deformation groove (17), the interior of the rivet screw sleeve (13) being threadedly connected with a rivet bolt (15), and the outer wall of the rivet bolt (15) being movably connected with a plurality of counterweight rings (16).

2. The motor rotor dynamic balancing structure according to claim 1, characterized in that: The outer wall of the clamping plate (5) is penetrated by a plurality of positioning holes (11) matching the metal rods (8).

3. The motor rotor dynamic balancing structure according to claim 1, characterized in that: The outer wall of the rotating shaft (2) is movably connected with a washer (7) located between the fastening nut (6) and the clamping plate (5).

4. The motor rotor dynamic balancing structure according to claim 1, characterized in that: One end of the rivet nut (13) is fixedly connected to a clamping outer edge (14) located outside the clamping plate (5).

5. The motor rotor dynamic balancing structure according to claim 1, characterized in that: The material of the rivet nut (13) is metal with relatively low hardness.

6. The motor rotor dynamic balancing structure according to claim 1, characterized in that: The numbers of the clamping holes (12) and the placement grooves (10) are both even numbers.

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