Balancing block rotor assembly made of magnetic conductive material

Abstract

The utility model discloses a balancing weight rotor assembly made of magnetic conductive materials, which is fixed on one side of a motor rotor, and the motor rotor comprises a rotor iron core extending axially and a plurality of magnetic steels arranged on the periphery of the rotor iron core in a penetrating manner. The balance block comprises a balance block body which extends in the axial direction and is made of a magnetic conductive material. The avoiding step and the balance block main body are integrally formed, the avoiding step is arranged between the balance block main body and the motor rotor, the avoiding step avoids the magnetic steel to form an annular space between the balance block main body and the motor rotor, and the annular space has a first thickness in the axial direction; the rivet holes are formed in the balance block body and / or the avoiding step in the direction parallel to the axial direction, so that the balance block body can be riveted to the rotor assembly through rivets. By means of the structure, the situation that magnetic leakage of the magnetic steel to the balance block can still be avoided through a low-cost magnetic conductive material can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle-mounted compressor motors, in particular to a balance block rotor assembly made of magnetic conductive materials. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] The compressor is an indispensable part of the vehicle system and is mainly used in vehicle air conditioning, pneumatic brakes, pneumatic power steering, fuel cells and other systems. The motor is the core component of the vehicle compressor. Its role in the compressor is to provide power, drive the impeller or piston to compress the gas, thereby increasing the pressure and temperature of the gas. However, with the development of the automotive industry, the market has also put forward higher requirements for motor components, requiring motor components to have higher reliability, higher manufacturability, lower motor vibration and noise, and lower production costs. In the motor rotor assembly, the design of the balance block has the greatest impact on the vibration and noise of the motor rotor, and is also related to the manufacturing cost of the entire motor. Therefore, at this stage, various manufacturers are actively exploring new solutions or combinations of balance block structures to enhance product competitiveness and meet the needs of various aspects of the market.

[0004] The motor rotor balancing block structure of existing compressors usually adopts a flat loose sheet stacking structure or an integrally processed concave-convex structure. Its disadvantage is that the stacked sheets need to be manually assembled in sequence, which has high production costs and is prone to misinstallation, missing installation, and over-installation, resulting in a high output defect rate. At the same time, existing balancing blocks are generally made of non-magnetic materials such as copper, stainless steel, and high manganese steel. The advantage of the above materials is that they are non-magnetic. When installed on the rotor end face, they will not be magnetized by the magnetic steel in the motor rotor, thereby avoiding the influence of the balancing block on the working magnetic circuit of the motor rotor during the operation of the motor, thereby ensuring the overall performance of the motor. However, the raw material cost and manufacturing cost of the non-magnetic materials currently on the market are very high, and the price fluctuates greatly.

[0005] Currently, there is no balance weight rotor assembly made of magnetic conductive material that can effectively solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a balancing weight rotor assembly made of magnetic conductive material, which can realize the use of magnetic conductive material to manufacture balancing weights, significantly reducing production costs, and avoiding the risks of over-installation and missing balancing weights through an integrated structure, thereby improving the product yield.

[0007] In order to achieve the above-mentioned object, the utility model discloses the following balance block rotor assembly of magnetic conductive material, which is fixed on one side of a motor rotor to keep the motor rotor balanced, wherein the motor rotor comprises an axially extending rotor core and a plurality of magnetic steels penetrating the periphery of the rotor core; and includes:

[0008] A balancing weight body, the balancing weight body extending along the axial direction, and the material of the balancing weight body is set to be a magnetic conductive material;

[0009] An avoidance step, wherein the avoidance step and the balancing block body are integrally formed, the avoidance step is arranged between the balancing block body and the motor rotor, the avoidance step avoids the magnetic steel to form an annular space between the balancing block body and the motor rotor, and the annular space has a first thickness along the axial direction;

[0010] Rivet holes, a plurality of the rivet holes are arranged on the balancing weight body and / or the avoidance step along a direction parallel to the axial direction, so that the balancing weight body can be riveted to the rotor assembly by rivets.

[0011] Furthermore, it also includes a cover plate, the material of the cover plate is set to be a non-magnetic material, the cover plate is set on one side of the avoidance step and the motor rotor, the cover plate can completely cover one side of the motor rotor, so that the annular space is set between the balancing block body and the cover plate, and the cover plate has a second thickness.

[0012] Furthermore, the first thickness is greater than or equal to 0.5 mm, and the second thickness is between 0.5 mm and 1 mm.

[0013] Furthermore, the avoidance step includes an integrally formed balancing block limiting structure, and the balancing block limiting structure is arranged between the avoidance step and the motor rotor. The motor rotor also includes a groove matching the balancing block limiting structure, so that the avoidance step is limited by the groove.

[0014] Furthermore, the motor rotor may include two sets of balancing weight rotor assemblies made of the magnetic conductive material that cooperate with each other on both sides.

[0015] Furthermore, the balancing weight body is configured in a semicircular ring shape, and the outer dimensions of the balancing weight body match the outer dimensions of the motor rotor.

[0016] By means of the above technical solution, the beneficial effects of the utility model are as follows:

[0017] The magnetic conductive material balance block rotor assembly of the utility model creates an annular space for isolation between the balance block body and the magnetic steel of the motor rotor through an integrally formed balance block body and an avoidance step structure, so that the balance block body and the magnetic steel are not in direct contact, and the air in the annular space is used to significantly reduce the possibility of magnetic induction between the balance block body and the magnetic steel, thereby avoiding the magnetic leakage phenomenon of the magnetic steel to the greatest extent, and reducing the problems caused by the magnetic change of the magnetic steel during the operation of the motor system, so that the balance block body can use a magnetic conductive material with a lower cost. In addition, the integrally formed balance block structure of the utility model avoids the hidden dangers of mis-installation, missing installation, and over-installation that reduce the yield rate caused by traditional manual lamination assembly, significantly reduces production costs, and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is an exploded view of a balance weight rotor assembly of a magnetic conductive material provided in an embodiment of this specification;

[0020] Figure 2 It is a single balancing weight elevation view of a balancing weight rotor assembly made of a magnetic conductive material provided in an embodiment of this specification;

[0021] Figure 3 It is a double balancing weight elevation view of a balancing weight rotor assembly of a magnetic conductive material provided in an embodiment of this specification;

[0022] Figure 4 It is an axonometric view of the bottom of a balancing weight of a balancing weight rotor assembly made of a magnetically conductive material provided in an embodiment of this specification;

[0023] Figure 5 It is a schematic diagram of motor magnetic leakage of a balancing block rotor assembly of a magnetic conductive material without an avoidance step provided in an embodiment of this specification;

[0024] Figure 6 It is a schematic diagram of a motor magnetic leakage of a balancing block rotor assembly of a magnetic conductive material with an avoidance step provided in an embodiment of this specification;

[0025] In the figure: 1. motor rotor; 11. rotor core; 12. magnetic steel; 2. balancing block body; 3. avoidance step; 31. balancing block limiting structure; 4. annular space; 5. rivet hole; 6. cover plate; a. first thickness; b. second thickness. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the drawings in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this specification.

[0027] In the description of the present utility model, it should be noted that the terms "upper", "middle", "lower", "inner", "outer", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. The terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. The following describes the implementation method of the present utility model based on its overall structure.

[0028] See also Figures 1 to 4 , is a balancing block rotor assembly of a magnetic conductive material provided in this embodiment. The balancing block rotor assembly in this embodiment is fixed on one side of a motor rotor 1 and is used to keep the motor rotor 1 balanced, wherein the motor rotor 1 includes an axially extending rotor core 11 and a plurality of magnetic steels 12 penetrating the periphery of the rotor core 11; it includes: a balancing block body 2, the balancing block body 2 extends along the axial direction, and the material of the balancing block body 2 is set to be a magnetic conductive material; an avoidance step 3, the avoidance step 3 and the balancing block body 2 are an integrally formed structure, the avoidance step 3 is arranged between the balancing block body 2 and the motor rotor 1, the avoidance step 3 avoids the magnetic steel 12 to form an annular space 4 between the balancing block body 2 and the motor rotor 1, and the annular space 4 has a first thickness a along the axial direction; a rivet hole 5, a plurality of rivet holes 5 are arranged on the balancing block body 2 and / or the avoidance step 3 along a direction parallel to the axial direction, so that the balancing block body 2 can be riveted to the rotor assembly 1 through the rivet 5.

[0029] By means of the above-mentioned balancing block rotor assembly of the magnetic conductive material, this embodiment forms a step-like structure for avoiding the magnetic steel 12 through the combination of the avoidance step 3 and the balancing block body 2. Through the step-like structure, an annular space 4 with a first thickness a is generated between the balancing block body 2 and the magnetic steel 12 of the motor rotor 1, and then the air in the annular space 4 causes the magnetic force of the balancing block body 2 and the magnetic steel 12 to be magnetically isolated. Due to the existence of the isolation, although the balancing block body 2 is entirely made of magnetic conductive materials (such as iron-based materials, etc.), it is still difficult for the balancing block body 2 to have a magnetic interaction relationship with the magnetic steel 12, thereby avoiding the magnetic steel 12 from being affected by the balancing block body 2 to the greatest extent, and then on the basis of not adopting the method of artificial lamination, the result of producing the balancing block rotor assembly using magnetic conductive materials with lower cost is achieved.

[0030] For further information, see Figure 1 and Figure 2 , and also includes a cover plate 6, the material of the cover plate 6 is set to be a non-magnetic material, the cover plate 6 is set on one side of the avoidance step 3 and the motor rotor 1, and the cover plate 6 can completely cover one side of the motor rotor 1, so that the annular space 4 is set between the balancing block body 2 and the cover plate 6, and the cover plate 6 has a second thickness b. Among them, the existence of the cover plate 6 further realizes the magnetic isolation between the magnetic steel 12 and the balancing block body 2, and the greater the second thickness b, the farther the distance between the magnetic steel 12 and the balancing block body 2, and the more air there is on the distance between the magnetic steel 12 and the balancing block body 2, which can significantly reduce the electromagnetic effect between the magnetic steel 12 and the balancing block body 2.

[0031] For further information, see Figure 2 In this embodiment, the first thickness a is greater than or equal to 0.5 mm, and the second thickness b is between 0.5 mm and 1 mm. In this case, the best solution to avoid magnetic leakage of the magnetic steel 12 can be obtained.

[0032] For further information, see Figure 4 The avoidance step 3 includes an integrally formed balancing block limiting structure 31, which is arranged between the avoidance step 3 and the motor rotor 1. The motor rotor 1 also includes a groove matching the balancing block limiting structure 31, so that the avoidance step 3 is limited by the groove. The balancing block limiting structure 31 is arranged at a central position on the avoidance step 3, and the balancing block limiting structure 31 is provided with a mirror structure matching the avoidance step 3, that is, the groove included in the motor rotor 1 has an inner contour matching the balancing block limiting structure 31, so that the balancing block body 2 can be fixed more stably, and the balancing block body 2 is prevented from circumferential displacement during the operation of the compressor.

[0033] Furthermore, if Figure 3As shown, the motor rotor 1 may include two sets of balancing weight rotor assemblies made of magnetic conductive materials that cooperate with each other on both sides. With the cooperation of the two sets of balancing weight rotor assemblies made of magnetic conductive materials, the forces on both sides of the motor rotor 1 are more uniform and stable, and the motor rotor 1 can achieve the best operating state.

[0034] Furthermore, if Figure 4 As shown, the balancing block body 2 is configured in a semicircular shape, and the outer dimensions of the balancing block body 2 match the outer dimensions of the motor rotor 1, which can improve the installation accuracy and stability of the balancing block body 2, prevent the balancing block body 2 from loosening or falling off when the motor rotor 1 rotates, and also reduce the aerodynamic effect of the balancing block body 2 on the motor rotor 1.

[0035] Please refer to Figure 5 and Figure 6 , is a schematic diagram of the effect of the balance block rotor assembly of the magnetic conductive material of the utility model against the leakage magnetic effect, wherein, Figure 5 In the state without the avoidance step 3, the connection between the magnetic steel 12 and the balancing block body 2 is relatively strong, that is, the phenomenon of magnetic flux leakage from the magnetic steel 12 to the balancing block body 2 is obvious; and Figure 6 This is the state with the avoidance step 3. In the state with the avoidance step 3, the connection between the magnet 12 and the balance block body 2 is weak. Since there is air isolation between the magnet 12 and the balance block body 2, the phenomenon of magnetic leakage from the magnet 12 to the balance block body 2 is significantly weakened.

[0036] By using the balance weight rotor assembly made of magnetic conductive material of the utility model, when the balance weight body 2 of the main structure adopts magnetic conductive material such as iron base with lower cost, the annular space 4 formed between the balance weight body 2 and the magnetic steel 12 can be used to reduce the magnetic leakage of the magnetic steel 12 by using the avoidance step 3. At the same time, with the help of the trapezoidal structure of the utility model, the low yield rate of the traditional artificial lamination structure is also avoided.

[0037] The present invention uses specific embodiments to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A balance weight rotor assembly of a magnetic conductive material, fixed on one side of a motor rotor, for maintaining the balance of the motor rotor, wherein: The motor rotor comprises an axially extending rotor core and a plurality of magnetic steels penetrating the periphery of the rotor core; the motor rotor is characterized by comprising: A balancing weight body, the balancing weight body extending along the axial direction, and the material of the balancing weight body is set to be a magnetic conductive material; An avoidance step, wherein the avoidance step and the balancing block body are integrally formed, the avoidance step is arranged between the balancing block body and the motor rotor, the avoidance step avoids the magnetic steel to form an annular space between the balancing block body and the motor rotor, and the annular space has a first thickness along the axial direction; Rivet holes, a plurality of the rivet holes are arranged on the balancing weight body and / or the avoidance step along a direction parallel to the axial direction, so that the balancing weight body can be riveted to the rotor assembly by rivets.

2. The balance weight rotor assembly of the magnetic conductive material according to claim 1, characterized in that: It also includes a cover plate, the material of the cover plate is set to be a non-magnetic material, the cover plate is set on one side of the avoidance step and the motor rotor, the cover plate can completely cover one side of the motor rotor, so that the annular space is set between the balancing block body and the cover plate, and the cover plate has a second thickness.

3. The balance weight rotor assembly of the magnetic conductive material according to claim 2, characterized in that: The first thickness is greater than or equal to 0.5 mm, and the second thickness is between 0.5 mm and 1 mm.

4. The balance weight rotor assembly of the magnetic conductive material according to claim 1, characterized in that: The avoidance step includes an integrally formed balancing block limiting structure, and the balancing block limiting structure is arranged between the avoidance step and the motor rotor. The motor rotor also includes a groove matching the balancing block limiting structure, so that the avoidance step is limited by the groove.

5. The balance weight rotor assembly of the magnetic conductive material according to claim 1, characterized in that: The motor rotor may include two sets of balancing weight rotor assemblies made of magnetically conductive materials that cooperate with each other on both sides.

6. The balance weight rotor assembly of the magnetic conductive material according to claim 1, characterized in that: The balancing block body is arranged in a semicircular ring shape, and the outer dimensions of the balancing block body match the outer dimensions of the motor rotor.

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