Fastening structure of brushless blower motor

Abstract

The invention provides a fastening structure of a brushless blower motor, and belongs to the technical field of motors. The iron core is divided into the upper layer group comprising the plurality of upper layer iron core pieces and the lower layer group comprising the plurality of lower layer iron core pieces, the inner sides of the inner rings of each upper layer iron core piece and each lower layer iron core piece are provided with the plurality of groups of clamping claws extending towards the ring center, and meanwhile, the outer wall of the cylinder of the supporting seat is provided with the plurality of clamping grooves in the axial direction; one end of each clamping groove is provided with a side groove which extends laterally and is communicated with the cylinder, so that when the upper-layer iron core piece and the lower-layer iron core piece are arranged on the cylinder in a sleeving manner, the clamping claws of the lower-layer iron core piece can be clamped into the corresponding clamping grooves, and the clamping claws on the upper-layer iron core piece can be bent and clamped into the side grooves when entering the clamping grooves and moving to the side grooves; the lower layer group is pressed by the upper layer group, stable installation of the iron core on the supporting seat is realized, the structure and the technology are simple, processing is more convenient, cost reduction is facilitated, and popularization and application of the brushless blower motor are also facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of motors, and in particular to a fastening structure of a brushless blower motor. Background Art

[0002] As a type of brushless motor, the brushless blower motor is usually used as an electric driving force output structure, such as in automobile air conditioning blowing scenarios. It has a large market demand and broad industry prospects.

[0003] At present, the structure of the brushless blower motor available on the market is such as a brushless motor stator core and a brushless motor disclosed in patent CN108134458A, wherein the stator core includes a plurality of iron core sheets, and the plurality of iron core sheets are stacked and arranged, and the stator core is sleeved on the core bracket, and the stator core is fixed by the core bracket, and each iron core sheet includes a yoke and a plurality of evenly distributed teeth, and the end of the tooth close to the center of the stator core is an arc-shaped end, and a rectangular notch is provided in the middle of the arc-shaped end, and the arc-shaped ends of the plurality of teeth are located on the same circle, and in addition, the outer wall of the core bracket is provided with slots corresponding to the plurality of teeth along its axial direction, and during installation, the stator core is sleeved on the core bracket, and the arc-shaped ends of the teeth are inserted into the corresponding slots, so as to realize the fixed installation of the stator core and the core bracket. In addition, since the stator core is the magnetic circuit part of the motor and the core structure for the normal operation of the motor, it is very necessary to ensure that the stator core is fixed. Therefore, when the stator core is installed on the core bracket, bolts are used to pass through several iron sheets along the axial direction of the stator core and then connected to the core bracket to achieve axial fixation of the stator core, further ensuring the stability of the stator core after fixation. Although the above structure can meet the use requirements of stable and fastening of the stator core, the method of fixing the stator core by bolts must ensure that the holes on each iron sheet are aligned during installation, which requires extremely high processing accuracy and is difficult to process, resulting in high costs and hindering the large-scale application and promotion of brushless blower motors. Summary of the invention

[0004] In view of the above-mentioned problems existing in the prior art, it is now intended to provide a fastening structure of a brushless blower motor, so as to divide a plurality of iron core sheets into a lower group and a lower group, wherein a plurality of upper iron core sheets of the upper group and a plurality of lower iron core sheets of the lower group are stacked and arranged, and a plurality of groups of claws are arranged on the inner side of the inner ring of each upper iron core sheet and the lower iron core sheet, and at the same time, a plurality of groups of claws are opened on the outer wall of the cylinder of the support seat of the iron core along its axial direction, and a plurality of grooves corresponding to the claws are arranged one by one, and a side groove is arranged at one end of each groove, and after the upper group and the lower group are both sleeved on the cylinder, the claws of the plurality of lower iron core sheets of the lower group are inserted into the corresponding grooves, and the claws of the plurality of upper iron core sheets of the upper group are bent and inserted into the side grooves, so that the upper group and the lower group can be installed and the lower group can be limited by the upper group, so that the iron core can be fastened and installed on the support seat without adding other structures, and the structure is simple and the processing is convenient, thereby reducing the cost, which is conducive to the large-scale application and promotion of brushless blower motors.

[0005] The specific technical solutions are as follows: A fastening structure for a brushless blower motor, used for installing an iron core on a support seat, has the following characteristics: the iron core comprises a plurality of iron core pieces, the support seat comprises a cylinder, the plurality of iron core pieces are divided into an upper group and a lower group, the plurality of iron core pieces of the upper group are a plurality of upper iron core pieces and are arranged in a stacked manner, the plurality of iron core pieces of the lower group are a plurality of lower iron core pieces and are arranged in a stacked manner, and the plurality of iron core pieces of the lower group are a plurality of lower iron core pieces and are arranged in a stacked manner, and the inner ring of each of the upper iron core pieces and the lower iron core pieces is provided with a plurality of groups of claws extending toward the ring center, one end of the cylinder is provided with a plurality of grooves corresponding to the plurality of groups of claws along its axial direction, and one end of the groove extends through an end face of the cylinder, and at the same time, each groove is provided with a side groove connected to itself near one end of the cylinder through which it passes, the plurality of lower iron core pieces of the lower group and the plurality of upper iron core pieces of the upper group are sequentially sleeved on the cylinder in a stacked manner, the plurality of groups of claws of each lower iron core piece are respectively inserted into the corresponding grooves, and the plurality of groups of claws of each upper iron core piece are respectively inserted into the corresponding side grooves after being bent.

[0006] The above-mentioned fastening structure of a brushless blower motor, wherein a coaxial ring arranged toward the center of the ring is provided on the inner ring of each upper iron core sheet and each lower iron core sheet and between two adjacent groups of claws, each coaxial ring is an arc-shaped structure, and the coaxial rings of the upper iron core sheet and the lower iron core sheet are both against the outer wall of the cylinder.

[0007] The above-mentioned fastening structure of a brushless blower motor, wherein each group of claws includes two clamping feet, and the two clamping feet correspond to the two side groove walls of the slot respectively. At the same time, side grooves are provided on both sides of each slot, and the two clamping feet of the claws of the upper iron chip are bent in opposite directions and then clamped into the two side grooves of the corresponding slot.

[0008] In the above-mentioned fastening structure of a brushless blower motor, each group of claws of the upper iron core sheet is bent and inserted into the side groove by stamping.

[0009] In the above-mentioned fastening structure of a brushless blower motor, among the two edges of the slot opening of each side slot communicating with the corresponding clamping slot, the edge located near one end of the end surface of the cylinder through which the clamping slot passes is chamfered.

[0010] In the above-mentioned fastening structure of a brushless blower motor, a protruding limiting step is provided on one end of the cylinder and located away from the end face through which the slot passes, and the inner ring of the lower iron core sheet in the lower group which is farthest away from the upper group abuts against the limiting step.

[0011] In the above-mentioned fastening structure of a brushless blower motor, the support seat is a plastic support seat or a cast aluminum support seat.

[0012] The positive effects of the above technical solution are: The above-mentioned fastening structure of the brushless blower motor is achieved by dividing the plurality of iron core sheets into an upper group including a plurality of upper iron core sheets and a lower group including a plurality of lower iron core sheets, and a plurality of groups of claws facing the ring center are arranged on the inner ring of each upper iron core sheet, and at the same time, a plurality of grooves corresponding to the plurality of groups of claws are opened on the outer wall of the cylinder of the support seat along its axial direction, and a connected side groove is arranged at one end of each groove, and the plurality of lower iron core sheets of the lower group and the plurality of iron core sheets of the upper group are sequentially sleeved on the cylinder in a stacked manner, and the claws of each lower iron core sheet are respectively inserted into the corresponding grooves, and the claws of each upper iron core sheet are bent and inserted into the side grooves connected to the corresponding grooves, so that the upper iron core sheets and the lower iron core sheets can be installed on the support seat, and the lower iron core sheets can be pressed by the upper iron core sheets to realize the fastening installation of the iron core on the support seat, the structure and process are simple, the processing is convenient, the cost is effectively reduced, and the needs of large-scale application and promotion of brushless blower motors are met. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A structural diagram showing a fastening structure of a brushless blower motor according to an embodiment of the present invention from one perspective; Figure 2 A structural diagram showing another perspective of an embodiment of a fastening structure of a brushless blower motor of the present invention; Figure 3 A structural diagram of an iron core of a fastening structure of a brushless blower motor of the present invention; Figure 4 A structural diagram of a lower iron core sheet of a fastening structure of a brushless blower motor of the present invention; Figure 5 A structural diagram of an upper iron core sheet of a fastening structure of a brushless blower motor of the present invention; Figure 6The present invention is a structural diagram of a support base of a fastening structure of a brushless blower motor.

[0014] In the accompanying drawings: 1, iron core; 11, upper layer group; 12, lower layer group; 111, upper iron core sheet; 121, lower iron core sheet; 1111, inner ring; 1112, claw; 1113, coaxial ring; 11121, foot; 2, support seat; 21, column; 211, slot; 212, side slot; 213, limit step. DETAILED DESCRIPTION

[0015] In order to make the technical means, creative features, objectives and effects of the present invention easier to understand, the following embodiments are combined with the attached Figure 1 To Attachment Figure 6 The technical solution provided by the present invention is described in detail, but the following content is not intended to limit the present invention.

[0016] Figure 1 A structural diagram showing a fastening structure of a brushless blower motor according to an embodiment of the present invention from one perspective; Figure 2 FIG. 2 is a structural diagram of another perspective of an embodiment of a fastening structure of a brushless blower motor of the present invention. Figure 1 and Figure 2 As shown, the fastening structure of the brushless blower motor provided in this embodiment is used to install the iron core 1 on the support seat 2. At this time, the iron core 1 includes a plurality of iron core pieces, and the support seat 2 includes a column 21. The plurality of iron core pieces are stacked and arranged and are all mounted on the column 21 of the support seat 2.

[0017] Figure 3 A structural diagram of an iron core of a fastening structure of a brushless blower motor of the present invention; Figure 4 A structural diagram of a lower iron core sheet of a fastening structure of a brushless blower motor of the present invention; Figure 5 FIG. 1 is a structural diagram of an upper iron core sheet of a fastening structure of a brushless blower motor of the present invention. Figures 1 to 5 As shown, a plurality of iron core sheets are divided into two groups, namely, an upper layer group 11 and a lower layer group 12, and a suitable number of iron core sheets are selected to form the upper layer group 11 and the lower layer group 12 according to the fastening strength requirements. At this time, the plurality of iron core sheets of the upper layer group 11 are set to be a plurality of upper layer iron core sheets 111 and are arranged in a stacked manner, and the plurality of iron core sheets of the lower layer group 12 are set to be a plurality of lower layer iron core sheets 121 and are also arranged in a stacked manner, and the upper layer group 11 is stacked on the lower layer group 12, so as to meet the structural requirement that the plurality of iron core sheets of the iron core 1 are arranged in a stacked manner. In addition, the inner ring 1111 of each upper layer iron core sheet 111 and the lower layer iron core sheet 121 are provided with a plurality of groups of claws 1112 extending toward the center of the ring, which provides conditions for subsequently restricting the upper layer iron core sheet 111 and the lower layer iron core sheet 121 on the support seat 2.

[0018] in addition, Figure 6 FIG. 1 is a structural diagram of a support base of a fastening structure of a brushless blower motor of the present invention. Figures 1 to 6 As shown, one end of the column 21 of the support seat 2 is provided with a plurality of slots 211 corresponding to a plurality of groups of claws 1112 along its axial direction, and one end of each slot 211 extends through one end face of the column 21, so that when the upper iron core sheet 111 and the lower iron core sheet 121 are subsequently mounted on the column 21, the claws 1112 on the upper iron core sheet 111 and the lower iron core sheet 121 can enter into the slot 211 from the port at one end of the slot 211 passing through the end face, thereby meeting the installation requirements of the upper iron core sheet 111 and the lower iron core sheet 121 on the column 21. At the same time, each slot 211 is also provided with a side slot 212 connected to itself near one end of the column 21 through which it passes. The side slot 212 is arranged along the tangent of the column 21, that is, the side slot 212 is arranged perpendicular to the corresponding slot 211. The side slot 212 realizes the lateral expansion of a part of the slot 211, which provides conditions for the subsequent clamping of the claws 1112 of the upper iron core sheet 111. During installation, the lower iron core sheets 121 of the lower group 12 and the upper iron core sheets 111 of the upper group 11 are sequentially sleeved on the column 21 in a stacked manner, and the several groups of claws 1112 of each lower iron core sheet 121 are respectively inserted into the corresponding slots 211. The corresponding claws 1112 are limited by the slots 211, thereby limiting the circumferential rotation of the lower iron core sheet 121 on the column 21, and realizing the installation of the lower iron core sheet 121 on the support seat 2. In addition, the several groups of claws 1112 of each upper iron core sheet 111 are bent and respectively inserted into the corresponding side grooves 212, that is, the claws 1112 of each upper iron core sheet 111 cooperate and clamp with the side grooves 212 on the side of the groove 211, so that the claws 1112 of the upper iron core sheet 111 are misaligned with the groove 211 in the axial direction of the cylinder 21, that is, the claws 1112 of the upper iron core sheet 111 are clamped by the side grooves 212, thereby preventing the upper iron core sheet 111 from circumferentially rotating on the cylinder 21 and axially falling off, and also enabling the upper iron core sheet 111 to press the lower iron core sheet 121 to prevent the lower iron core sheet 121 from axially falling off from the cylinder 21, and improving the installation position accuracy while also achieving self-tightening, thereby meeting the design requirements of a structure with multiple functions, with simple structure and process, and convenient processing, thereby effectively reducing costs, and facilitating the large-scale application and promotion of brushless blower motors.

[0019] Specifically, a plurality of coaxial rings 1113 are arranged on the inner ring 1111 of each upper iron core sheet 111 and each lower iron core sheet 121, and a coaxial ring 1113 is arranged between two adjacent groups of claws 1112, and each coaxial ring 1113 is arranged toward the center of the inner ring 1111. At the same time, each coaxial ring 1113 is an arc structure, and the coaxial rings 1113 of the upper iron core sheet 111 and the lower iron core sheet 121 are located on coaxial circles with the same diameter. During installation, the coaxial rings 1113 of the upper iron core sheet 111 and the lower iron core sheet 121 are abutted against the outer wall of the cylinder 21. The coaxial rings 1113 can ensure that the upper iron core sheet 111 and the lower iron core sheet 121 are coaxially arranged with the cylinder 21 after installation, thereby ensuring the coaxiality of the iron core 1 and the support seat 2, thereby improving the performance of the motor.

[0020] More specifically, each group of claws 1112 of the upper iron core sheet 111 and the lower iron core sheet 121 includes two clamping feet 11121. At this time, the two clamping feet 11121 of the same group correspond to the two side groove 212 walls of the slot 211 respectively, so that the upper iron core sheet 111 and the lower iron core sheet 121 can be quickly and accurately put on the column 21 of the support seat 2, and at the same time, the circumferential rotation of the upper iron core sheet 111 and the lower iron core sheet 121 on the column 21 can be limited. At the same time, side grooves 212 are provided on both sides of each slot 211, that is, the side grooves 212 are symmetrically arranged on both sides of the connected slot 211. During installation, the two clamping feet 11121 of the clamping claw 1112 of the upper iron core sheet 111 are bent in opposite directions and respectively inserted into the two side grooves 212 of the corresponding slot 211, so that the upper iron core sheet 111 can be evenly stressed when being clamped by the side grooves 212, thereby improving the stability of the upper iron core sheet 111 after installation and achieving a better installation and fastening effect.

[0021] More specifically, when each group of claws 1112 of the upper iron core sheet 111 is bent and inserted into the corresponding side groove 212, it can be achieved by stamping, that is, the structure of the upper iron core sheet 111 can be consistent with that of the lower iron core sheet 121 during processing, ensuring the uniformity during processing, further improving the processing efficiency, and reducing the processing cost. When the upper iron core sheet 111 is installed on the cylinder 21 of the support seat 2, the claws 1112 of the upper iron core sheet 111 are first inserted from the corresponding grooves 211, and when the claws 1112 of the upper iron core sheet 111 are moved to the side grooves 212, the claws 1112 are bent by means of tools such as expansion and pressing, so that the claws 1112 enter the side grooves 212, which is convenient and easy to install, and reduces the production cost.

[0022] More specifically, since each side groove 212 is connected to the corresponding card slot 211, at this time, one of the two edges of the slot that connects each side groove 212 to the corresponding card slot 211 is chamfered, and the chamfered edge is the edge close to the end of the end surface of the card slot 211 that penetrates the cylinder 21. Since the axial movement of the upper iron core sheet 111 is limited by the card slot 211 when the upper iron core sheet 111 cooperates with the card slot 211, the lower iron core sheet 111 is pressed by the upper iron core sheet 111. After 21, the claws 1112 of the top few upper iron core sheets 111 have a smaller space to enter the side groove 212 and will be squeezed by the top wall of the side groove 212, and the edge of the end face of the cylinder 21 that passes through the groove 211 is chamfered so that the claws 1112 of the top few upper iron core sheets 111 can be guided by the chamfered edge when entering the corresponding side groove 212, so that they can be smoothly inserted into the corresponding side groove 212, which further facilitates installation.

[0023] More specifically, a protruding limiting step 213 is further provided on the cylinder 21 and at one end of the end face which is away from the slot 211, that is, the outer wall of the cylinder 21 is a variable cross-section structure, and the cross-section of the end of the cylinder 21 where the slot 211 is provided is smaller than the cross-section of the part where the limiting step 213 is provided. When the lower layer group 12 is subsequently sleeved on the cylinder 21, the inner ring 1111 of the lower layer iron core sheet 121 in the lower layer group 12 which is farthest away from the upper layer group 11 abuts against the limiting step 213, that is, the inner ring 1111 of the lower layer iron core sheet 121 in the lowest layer of the lower layer group 12 abuts against the limiting step 213, so that one side of the lower layer group 12 is pressed against the limiting step 213 and the other side is pressed against the upper layer group 11, and the upper layer group 11 is clamped by the slot 211, so that the iron core 1 can be stably installed on the support seat 2, and the iron core 1 and the support seat 2 are tightly matched.

[0024] More specifically, the support base 2 for mounting the iron core 1 is a plastic support base 2 or a cast aluminum support base 2. The support base 2 can be manufactured using a suitable material according to manufacturing costs and performance requirements to meet different usage requirements.

[0025] The fastening structure of the brushless blower motor provided in this embodiment includes an iron core 1 and a support seat 2; the iron core 1 is divided into an upper group 11 including a plurality of upper iron core sheets 111 and a lower group 12 including a plurality of lower iron core sheets 121, and the inner side of the inner ring 1111 of each upper iron core sheet 111 and the lower iron core sheet 121 is provided with a plurality of groups of claws 1112 extending toward the ring center, and at the same time, a plurality of slots 211 are provided on the outer wall of the cylinder 21 of the support seat 2 along the axial direction thereof, and a side slot 212 extending and communicating laterally is provided at one end of the slot 211 , so that when the upper iron core sheet 111 and the lower iron core sheet 121 are sleeved on the column 21, the claws 1112 of the lower iron core sheet 121 can be inserted into the corresponding slots 211, and the claws 1112 on the upper iron core sheet 111 can be bent and inserted into the side slots 212 when entering the slots 211 and moving to the side slots 212. The upper group 11 presses the lower group 12 to achieve stable installation of the iron core 1 on the support seat 2. The structure and process are simple, the processing is more convenient, which is conducive to cost reduction, and is also conducive to the promotion and application of brushless blower motors.

[0026] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A fastening structure of a brushless blower motor, used for mounting an iron core on a support seat, characterized in that: The iron core comprises a plurality of iron core sheets, the support seat comprises a cylinder, the plurality of iron core sheets are divided into an upper group and a lower group, the plurality of iron core sheets of the upper group are a plurality of upper iron core sheets and are arranged in a stacked manner, the plurality of iron core sheets of the lower group are a plurality of lower iron core sheets and are arranged in a stacked manner, and a plurality of groups of claws extending toward the ring center are arranged on the inner ring of each of the upper iron core sheets and the lower iron core sheets, and one end of the cylinder is provided with a plurality of grooves corresponding to the plurality of groups of claws along its axial direction, and one end of the groove extends through an end face of the cylinder, and at the same time, each of the grooves is provided with a side groove connected to itself near the end through which the groove passes through the cylinder, the plurality of lower iron core sheets of the lower group and the plurality of upper iron core sheets of the upper group are sequentially sleeved on the cylinder in a stacked manner, the plurality of groups of claws of each lower iron core sheet are respectively inserted into the corresponding grooves, and the plurality of groups of claws of each upper iron core sheet are respectively inserted into the corresponding side grooves after being bent.

2. The fastening structure of the brushless blower motor according to claim 1, characterized in that: A coaxial ring arranged toward the center of the ring is provided on the inner ring of each of the upper iron core pieces and each of the lower iron core pieces and between two adjacent groups of the claws. Each of the coaxial rings is an arc-shaped structure, and the coaxial rings of the upper iron core pieces and the lower iron core pieces are both against the outer wall of the cylinder.

3. The fastening structure of the brushless blower motor according to claim 1, characterized in that: Each group of the clamping claws includes two clamping feet, which correspond to the two side groove walls of the clamping slot respectively. At the same time, side grooves are provided on both sides of each clamping slot. The two clamping feet of the clamping claws of the upper iron core sheet are bent in opposite directions and then clamped into the two side grooves corresponding to the clamping slot.

4. The fastening structure of the brushless blower motor according to claim 1, characterized in that: Each group of the claws of the upper iron core sheet is bent and clamped into the side groove by stamping.

5. The fastening structure of the brushless blower motor according to claim 1, characterized in that: Of the two edges of the slot opening of each side slot communicating with the corresponding clamping slot, the edge located near one end of the clamping slot penetrating the end surface of the cylinder is chamfered.

6. The fastening structure of the brushless blower motor according to claim 1, characterized in that: A protruding limiting step is provided on the column and at one end thereof which is away from the end surface through which the slot passes, and the inner ring of the lower layer iron core sheet which is farthest away from the upper layer group in the lower layer group abuts against the limiting step.

7. The fastening structure of the brushless blower motor according to claim 1, characterized in that: The support seat is a plastic support seat or a cast aluminum support seat.

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