Electric machine and fan for seat ventilation system or battery cooling system of vehicle

Abstract

The invention relates to a fan for use in a seat ventilation system or a battery cooling system of a vehicle, in particular a motor for a fan. A motor (1) for a fan is disclosed, comprising: three sets of coils (11), each set of coils (11) comprising at least one sub-coil (111) and having an electrical connection area (112) electrically connected to the respective other set of coils (11); and at least one electrical connection bracket (12), which is configured to allow automatic breaking of the wire cladding insulation of the electrical connection regions (112) to be electrically connected to each other, in particular of the wire end regions, and to cause them to produce an electrical connection, by means of its own assembly operation, in particular only by means of its own assembly operation. A corresponding fan, in particular for a seat ventilation system or a battery cooling system of a vehicle, is also disclosed. According to some exemplary embodiments of the invention, the structure is simple, the assembly is simple, the cost is low, and the arrangement is more compact.

Description

Technical Field

[0001] The present invention mainly relates to the field of vehicle ventilation systems, such as seat ventilation systems or battery cooling systems, and particularly relates to a motor for a fan and a corresponding fan, especially for a seat ventilation system or a battery cooling system of a vehicle. Background Art

[0002] With the development of technology and the improvement of people's requirements for comfort, more and more vehicles are beginning to be equipped with seat ventilation systems. At the same time, electric vehicles have also developed rapidly in recent years. Whether it is a seat ventilation system or a battery system of an electric vehicle, a fan is required to promote air flow.

[0003] Currently, the external wiring method of the coil of the fan motor uses welding, which requires a separate welding step. This not only makes the steps complex, but also the welding quality directly affects the wiring quality. In addition, considering the welding process, the structure of the motor becomes relatively complex and the structure is not compact enough.

[0004] In addition, welding also has requirements for the selection of the wire of the coil, making it impossible to more flexibly select the wire of the coil, which not only affects the winding process of the coil, but also affects the working characteristics of the motor.

[0005] Therefore, corresponding improvements are needed. Summary of the Invention

[0006] In order to overcome one of the above-mentioned drawbacks and / or other possible drawbacks not mentioned in this article, an object of the present invention is to provide an improved motor for a fan and a corresponding fan, especially for a seat ventilation system or a battery cooling system of a vehicle.

[0007] According to a first aspect of the present invention, there is provided a motor for a fan, comprising: three groups of coils, each group of coils including at least one sub-coil and having an electrical connection area electrically connected to the corresponding other group of coils; and at least one electrical connection bracket configured to allow, through its own assembly operation, especially only through its own assembly operation, to automatically break the wire coating insulation of the electrical connection areas, especially the wire end areas, to be electrically connected to each other and to cause the electrical connection areas to be electrically connected.

[0008] According to an alternative embodiment of the present invention, the stator of the motor includes the coil, an iron core, and a holding structure fixed relative to the iron core, and the electrical connection bracket is assembled on the holding structure.

[0009] According to an alternative embodiment of the present invention, the holding structure is integrally formed on the iron core.

[0010] According to an alternative embodiment of the present invention, the coil is held on the holding structure.

[0011] According to an alternative embodiment of the present invention, the holding structure includes a receiving seat for receiving the electrical connection bracket in an interference fit manner.

[0012] According to an alternative embodiment of the present invention, the holding structure is injection molded, in particular overmolded, onto at least a part of the iron core.

[0013] According to an alternative embodiment of the present invention, the receiving seat is configured as a protruding structure, in particular an axially protruding structure.

[0014] According to an alternative embodiment of the present invention, the receiving seat is configured to have a receiving groove, the electrical connection region is located in the receiving groove, and the electrical connection bracket is interference-fitted into the receiving groove and presses the electrical connection region.

[0015] According to an alternative embodiment of the present invention, the receiving groove includes a first groove for receiving the electrical connection bracket and a second groove for receiving the electrical connection region, and the first groove intersects and communicates with the second groove.

[0016] According to an alternative embodiment of the present invention, all the receiving seats are preferably uniformly located on the same end side of the holding structure in the circumferential direction.

[0017] According to an alternative embodiment of the present invention, the receiving seat is arranged radially inward relative to the coil.

[0018] According to an alternative embodiment of the present invention, the first groove intersects the second groove perpendicularly.

[0019] According to an alternative embodiment of the present invention, the electrical connection region is located at the bottom of the second groove.

[0020] According to an alternative embodiment of the present invention, the electrical connection region is radially inwardly embedded in the second groove.

[0021] According to an alternative embodiment of the present invention, the first groove extends axially and is open at the free end of the receiving seat to allow the electrical connection bracket to be inserted from the free end.

[0022] According to an alternative embodiment of the present invention, the second groove extends radially through.

[0023] According to an alternative embodiment of the present invention, the second groove extends axially and is open at the free end of the receiving seat to allow the electrical connection region to axially slide to the bottom of the second groove.

[0024] According to an alternative embodiment of the present invention, each group of coils includes a plurality of, especially three, sub-coils connected in series with each other.

[0025] According to an alternative embodiment of the present invention, the three groups of coils are connected in a triangular configuration.

[0026] According to an alternative embodiment of the present invention, electrical connections are established between any two of the three groups of coils through the electrical connection bracket.

[0027] According to an alternative embodiment of the present invention, the electrical connection bracket is configured as a plug-in component.

[0028] According to an alternative embodiment of the present invention, the electrical connection bracket is configured as an integral component.

[0029] According to an alternative embodiment of the present invention, the electrical connection bracket is configured as a sheet.

[0030] According to an alternative embodiment of the present invention, the electrical connection bracket is made of a conductive material.

[0031] According to an alternative embodiment of the present invention, the electrical connection bracket is formed by stamping.

[0032] According to an alternative embodiment of the present invention, the electrical connection bracket is configured to be locked after the assembly operation.

[0033] According to an alternative embodiment of the present invention, the electrical connection bracket has a cutting structure for breaking the insulation of the wire and a clamping structure for firmly holding the electrical connection area.

[0034] According to an alternative embodiment of the present invention, the electrical connection bracket is configured to have a protrusion, especially an axially protruding protrusion, that is exposed and externally connected to electricity in the assembled state.

[0035] According to an alternative embodiment of the present invention, the electrical connection bracket includes a base and two holding arms extending side by side and spaced apart from the base, and a notch is formed between the two holding arms.

[0036] According to an alternative embodiment of the present invention, the notch includes a wire action area for acting on the electrical connection area during the assembly process.

[0037] According to an alternative embodiment of the present invention, the notch includes an elastic clamping enhancement area for enhancing the elastic clamping effect between the two holding arms.

[0038] According to an alternative embodiment of the present invention, the wire acting area includes an initial receiving opening for initially guiding the electrical connection area into the notch during the assembly process and a breaking opening for subsequently breaking the wire coating insulation of the electrical connection area entering through the initial receiving opening.

[0039] According to an alternative embodiment of the present invention, the elastic clamping reinforcement area includes a locally widened notch structure adjacent to the base and located at the bottom of the notch.

[0040] According to an alternative embodiment of the present invention, the initial receiving opening is configured to widen into a flared shape in a direction away from the base.

[0041] According to an alternative embodiment of the present invention, the breaking opening includes a first narrowing area, a second narrowing area, and a locally widened area located between the first narrowing area and the second narrowing area, wherein the first narrowing area is for initially breaking the wire coating insulation, and the second narrowing area is configured to be able to break the wire coating insulation again and / or clamp the electrical connection area.

[0042] According to an alternative embodiment of the present invention, the notch includes a third narrowing area located between the locally widened notch structure and the wire acting area.

[0043] According to an alternative embodiment of the present invention, the locally widened notch structure has an edge that is at least partially arc-shaped.

[0044] According to an alternative embodiment of the present invention, the holding arm has a locally widened structure at the breaking opening for locally enhancing the structural strength.

[0045] According to an alternative embodiment of the present invention, the electrical connection bracket further includes a locking structure located at or adjacent to the base for generating a locking effect after the assembly operation is completed.

[0046] According to an alternative embodiment of the present invention, the electrical connection bracket further includes a locally widened belt structure located at or adjacent to the base, allowing multiple electrical connection brackets to be pre-connected together before the assembly operation.

[0047] According to an alternative embodiment of the present invention, the electrical connection bracket further includes a pin extending reversely from the base relative to the holding arm.

[0048] According to an alternative embodiment of the present invention, the locking structure is configured as a barb structure.

[0049] According to an alternative embodiment of the present invention, multiple electrical connection brackets are formed by co-stamping and pre-connected together through the belt structure.

[0050] According to an alternative embodiment of the present invention, the electrical connection bracket has a symmetrical structure.

[0051] According to an alternative embodiment of the present invention, the electrical connection region is a continuous section of the wire of the coil.

[0052] According to an alternative embodiment of the present invention, the total diameter of the wire of the coil is in the range of 0.365 mm to 1.713 mm.

[0053] According to an alternative embodiment of the present invention, the diameter of the conductive core of the wire of the coil is in the range of 0.32 mm to 1.628 mm.

[0054] According to an alternative embodiment of the present invention, the thickness of the insulating material covering the wire is in the range of 0.041 mm to 0.081 mm.

[0055] According to an alternative embodiment of the present invention, the number of strands of the conductive core of the wire of the coil is 1 or 2.

[0056] According to an alternative embodiment of the present invention, the operating voltage of the motor is in the range of 8 V to 60 V.

[0057] According to an alternative embodiment of the present invention, the maximum rotational speed of the motor is 15000 rpm.

[0058] According to a second aspect of the present invention, there is provided a fan, in particular for a seat ventilation system or a battery cooling system of a vehicle, comprising a motor according to any of the above embodiments.

[0059] According to an alternative embodiment of the present invention, the fan further comprises a controller, and the electrical connection bracket of the motor is electrically connected to the controller.

[0060] According to an alternative embodiment of the present invention, the controller is configured as a printed circuit board, and the electrical connection bracket is plugged onto the printed circuit board.

[0061] According to certain exemplary embodiments of the present invention, the structure is simple, the assembly is simple, the cost is low, and the layout is more compact. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] Hereinafter, the present invention will be described in more detail by referring to the accompanying drawings, and the principles, features and advantages of the present invention can be better understood. The accompanying drawings include:

[0063] Figure 1 The iron core of the stator of the motor for the fan according to an exemplary embodiment of the present invention is shown separately in a perspective view.

[0064] Figure 2 It is shown thatFigure 1 A perspective view of the iron core shown with a holding structure injection-molded thereon.

[0065] Figure 3 Shows Figure 2 A perspective view of the holding structure shown with a coil held thereon.

[0066] Figure 4 Shows a perspective view of when an electrical connection bracket is about to be inserted into Figure 3 the structure shown.

[0067] Figure 5 Shows a perspective view of when the electrical connection bracket has been inserted into Figure 3 the structure shown.

[0068] Figure 6 Shows a perspective view of when the electrical connection bracket has been inserted into Figure 3 the structure shown with a partially enlarged perspective view.

[0069] Figure 7 Shows a perspective view of when the electrical connection bracket has been inserted into Figure 3 the structure shown with a partially enlarged perspective view from another angle.

[0070] Figure 8 Schematically shows the delta connection method of a coil according to an exemplary embodiment of the present invention.

[0071] Figure 9 Shows a front view of an electrical connection bracket according to an exemplary embodiment of the present invention.

[0072] Figure 10 Shows as Figure 9 a perspective view of the electrical connection bracket shown.

[0073] Figure 11 Shows as Figure 9 a perspective view of the electrical connection bracket shown at an angle when inserted into two electrical connection areas.

[0074] Figure 12 Shows as Figure 11 a perspective view of the configuration shown from another angle. Detailed Description of the Invention

[0075] In order to make the technical problems, technical solutions, and beneficial technical effects to be solved by the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the drawings and multiple exemplary embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the protection scope of the present invention.

[0076] Figure 1A core of a stator of a motor for a fan according to an exemplary embodiment of the present invention is shown separately in a perspective view.

[0077] Figure 2 is shown Figure 1 A perspective view when a holding structure is injection-molded on the shown core.

[0078] Figure 3 is shown Figure 2 A perspective view when a coil is held on the shown holding structure.

[0079] Figure 4 is shown when an electrical connection bracket is about to be fitted into Figure 3 the shown structure.

[0080] Figure 5 is shown when the electrical connection bracket has been fitted into Figure 3 the shown structure.

[0081] Figure 6 is shown when the electrical connection bracket has been fitted into Figure 3 a partially enlarged perspective view of the shown structure.

[0082] Figure 7 is shown when the electrical connection bracket has been fitted into Figure 3 another partially enlarged perspective view of the shown structure from another angle.

[0083] According to a first aspect of the present invention, as Figures 1 - 7 shown, there is provided a motor 1 for a fan, comprising: three sets of coils 11, each set of coils 11 including at least one sub-coil 111 and having an electrical connection area 112 that is electrically connected to a corresponding other set of coils 11; and at least one electrical connection bracket 12, the electrical connection bracket 12 being configured to allow, through its own assembly operation, in particular only through its own assembly operation, the wire covering insulation of the electrical connection areas 112 to be electrically connected to each other, in particular the wire end areas, to be automatically broken and to cause the electrical connection areas 112 to establish electrical connection.

[0084] Here, it should be clear that "assembly" refers to the operation of fitting the electrical connection bracket 12 as a component onto other components. In the present invention, the assembly operation itself also causes the wire covering insulation on the outer peripheral surface of the electrical connection areas 112 to be automatically broken and an electrical connection to be established between the electrical connection areas 112. Such an electrical connection can be an electrical connection formed by direct contact between the electrical connection areas 112 to be electrically connected to each other, or an electrical connection between the two through the electrical connection bracket 12, or both.

[0085] Therefore, different from the connection method by welding between the electrical connection regions 112, in the present invention, there is only an assembly operation, without any melting of materials occurring, nor any other materials used to bond the materials of the electrical connection regions 112 together. In fact, the electrical connection regions 112 are still separable from each other after their electrical connection, and there is no bonding of any materials between them.

[0086] Those skilled in the art can understand that the coil 11 is usually wound by a wire, and the wire usually adopts an enameled wire. An insulating paint is coated on the outer peripheral surface of the enameled wire, and after the insulating paint is damaged, electrical connection can be generated between the wires that are in contact with each other on the side. Of course, the wire can also be in other forms, such as a wire with a plastic insulating layer sleeved on its outer peripheral surface.

[0087] Generally, a group of coils 11 or a sub - coil 111 is wound by one or more continuous wires. At this time, the electrical connection region 112 can be the end section of the wire.

[0088] The three groups of coils 11 correspond to three phases. Therefore, the motor 1 is a three - phase motor at this time.

[0089] According to an exemplary embodiment of the present invention, the stator of the motor 1 includes a coil 11, an iron core 13, and a holding structure 14 fixed relative to the iron core 13, and the electrical connection bracket 12 is assembled on the holding structure 14.

[0090] That is to say, the electrical connection bracket 12 is not directly installed on the iron core 13, but on the holding structure 14 fixed on the iron core 13. This is very advantageous because no design adjustment of the iron core 13 is required.

[0091] According to an exemplary embodiment of the present invention, the holding structure 14 is integrally formed on the iron core 13, which can eliminate the need for separate connection and fixation between the two, and the combination between the two is very firm.

[0092] As a more preferred exemplary embodiment, the holding structure 14 is injection - molded, especially overmolded, onto at least a part of the iron core 13. As Figures 2 - 5 shown, the holding structure 14 overmolds the inner part of the iron core 13 and axially protrudes beyond the iron core 13 at both axial ends.

[0093] As Figure 3 、 Figure 4 and Figure 5 shown, according to an exemplary embodiment of the present invention, the coil 11 is held, for example, directly wound on the holding structure 14.

[0094] As Figure 4 and Figure 5As shown, according to an exemplary embodiment of the present invention, the holding structure 14 includes a receiving seat 141 for receiving the electrical connection bracket 12 in an embedded manner.

[0095] According to an exemplary embodiment of the present invention, the stator is configured to axially assemble a rotor (not shown) and related structures.

[0096] As Figure 4 and Figure 5 shown, according to an exemplary embodiment of the present invention, the receiving seat 141 is configured as a protruding structure, especially an axially protruding structure. In Figure 4 and Figure 5 , the receiving seat 141 axially protrudes downward.

[0097] As Figure 4 and Figure 5 shown, according to an exemplary embodiment of the present invention, the receiving seat 141 is configured to have a receiving groove 1411, the electrical connection area 112 is located in the receiving groove 1411, and the electrical connection bracket 12 is embedded in the receiving groove 1411 and presses the electrical connection area 112. Preferably, most of the electrical connection bracket 12 is embedded within the receiving seat 141.

[0098] Especially as Figure 4 , Figure 6 and Figure 7 shown, according to an exemplary embodiment of the present invention, the receiving groove 1411 includes a first groove 1412 for receiving the electrical connection bracket 12 and a second groove 1413 for receiving the electrical connection area 112, and the first groove 1412 intersects and communicates with the second groove 1413. Only when the first groove 1412 intersects and communicates with the second groove 1413 can the electrical connection bracket 12 be inserted from the first groove 1412 and act on the electrical connection area 112 in the second groove 1413.

[0099] According to an exemplary embodiment of the present invention, all the receiving seats 141 (three in the figure) are preferably uniformly located on the same end side of the holding structure 14 in the circumferential direction. In Figure 4 and Figure 5 , the receiving seats 141 are all located on the lower end side of the holding structure 14.

[0100] The motor 1 has a rotation axis, and preferably the receiving seats 141 are arranged along the same circumference centered on this rotation axis. The receiving seats 141 can be configured as an arc section or in a substantially rectangular body shape.

[0101] As Figure 4 , Figure 5 , Figure 7As shown, according to an exemplary embodiment of the present invention, the receiving seat 141 is arranged radially inward relative to the coil 11, preferably located radially inside the coil 11. This facilitates reducing the size of the motor 1 and improving compactness, and also enables the electrical connection area 112 to be conveniently embedded in the second groove 1413.

[0102] Preferably, the first groove 1412 can be arranged substantially circumferentially, and the second groove 1413 can extend radially. At this time, the first groove 1412 and the second groove 1413 intersect perpendicularly.

[0103] According to an exemplary embodiment of the present invention, the electrical connection area 112 is located at the bottom of the second groove 1413. In this way, the electrical connection area 112 can be smoothly acted on by the electrical connection bracket 12 when the electrical connection bracket 12 is inserted.

[0104] According to an exemplary embodiment of the present invention, as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 shown, the electrical connection area 112 is radially inwardly embedded in the second groove 1413. This means that the electrical connection area 112 is usually bent to an orientation perpendicular to the rotation axis.

[0105] According to an exemplary embodiment of the present invention, in combination with Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 shown, the first groove 1412 extends axially and is open at the free end 1414 (the lower end in the figure) of the receiving seat 141 to allow the electrical connection bracket 12 to be loaded from the free end 1414. At this time, the electrical connection bracket 12 is axially loaded.

[0106] According to an exemplary embodiment of the present invention, the second groove 1413 penetrates radially. This means that the second groove 1413 extends from the radially inner side of the receiving seat 141 to the radially outer side of the receiving seat 141.

[0107] Moreover, preferably, the second groove 1413 also extends axially similar to the first groove 1412 and is open at the free end 1414 of the receiving seat 141 to allow the electrical connection area 112 to axially slide from the free end 1414 to the bottom of the second groove 1413.

[0108] According to an exemplary embodiment of the present invention, each group of coils 11 includes a plurality of, especially three, sub - coils 111 connected in series with each other. At this time, these three sub - coils 111 are especially formed by one or more continuous wires. As Figure 2 can be seen, the three groups of coils 11 altogether include nine sub - coils 111.

[0109] As Figure 8As shown, the three sets of coils 11 are connected in a triangular configuration. Figure 8 The electrical connection bracket 12 and the electrical connection regions 112 are also schematically shown.

[0110] Preferably, an electrical connection is established between any two of the three sets of coils 11 through the electrical connection bracket 12.

[0111] Next, some exemplary embodiments of the electrical connection bracket 12 will be described in more detail with reference to the accompanying drawings.

[0112] Figure 9 A front view of the electrical connection bracket 12 according to an exemplary embodiment of the present invention is shown.

[0113] Figure 10 As shown Figure 9 A perspective view of the electrical connection bracket 12 as shown is presented.

[0114] Figure 11 As shown Figure 9 A perspective view of the electrical connection bracket 12 at an angle when the two electrical connection regions 112 are inserted is shown.

[0115] Figure 12 As shown Figure 11 A perspective view of another angle of the configuration as shown is presented.

[0116] It should be noted that due to limitations in the marking space of the figures or angle issues, some reference numerals are only marked in certain figures and can be referred to in combination with these figures as necessary.

[0117] As described above, the electrical connection bracket 12 can be configured as a plug-in component. This can greatly facilitate assembly. Particularly preferably, the electrical connection bracket 12 is configured to be installed in place with only one plug-in operation.

[0118] In particular, as Figures 9 - 12 shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 is configured as an integral component.

[0119] According to an exemplary embodiment of the present invention, the electrical connection bracket 12 is configured as a sheet.

[0120] According to an exemplary embodiment of the present invention, the electrical connection bracket 12 is made of a conductive material.

[0121] According to an exemplary embodiment of the present invention, the electrical connection bracket 12 is formed by stamping.

[0122] According to an exemplary embodiment of the present invention, the electrical connection bracket 12 is configured to be lockable, especially irreversibly, after the assembly operation. In this case, it can be ensured that the electrical connection regions 112 are always reliably electrically connected.

[0123] According to an exemplary embodiment of the present invention, the electrical connection bracket 12 has a cutting structure 121 for breaking the wire coating insulation and a clamping structure 122 for firmly holding the electrical connection area 112. The cutting structure 121 may be a sharp edge.

[0124] Combined Figure 5 As shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 is configured to have a protruding portion, particularly an axially protruding portion, which is exposed and externally connected to electricity in the assembled state. The externally connected protruding portion can be connected to a power source (not shown).

[0125] As Figures 9 - 12 shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 includes a base 123 and two holding arms 124 extending side by side and spaced apart from the base 123, and a notch 125 is formed between the two holding arms 124.

[0126] Especially as Figure 12 shown, according to an exemplary embodiment of the present invention, the notch 125 includes a wire acting area 1251 for acting on the electrical connection area 112 during the assembly process.

[0127] According to an exemplary embodiment of the present invention, the notch 125 includes an elastic clamping enhancement area 1252 for enhancing the elastic clamping effect between the two holding arms 124.

[0128] Referring to Figures 9 - 12 , according to an exemplary embodiment of the present invention, the wire acting area 1251 includes an initial receiving port 1253 for initially guiding the electrical connection area 112 into the notch 125 during the assembly process and a breaking port 1254 for subsequently breaking the wire coating insulation of the electrical connection area 112 entering through the initial receiving port 1253.

[0129] Preferably, the outer edge of the electrical connection bracket 12 in the area of the initial receiving port 1253 is tapered to facilitate insertion into the first groove 1412.

[0130] According to an exemplary embodiment of the present invention, the elastic clamping enhancement area 1252 includes a locally widened notch structure 1255 adjacent to the base 123 and located at the bottom of the notch 125.

[0131] According to an exemplary embodiment of the present invention, the initial receiving port 1253 is configured to widen into a flared shape in a direction away from the base 123 (i.e., the upward direction in the figure).

[0132] Especially as Figure 10As shown, according to an exemplary embodiment of the present invention, the break opening 1254 includes a first narrowing region 1256, a second narrowing region 1257, and a local widening region 1258 located between the first narrowing region 1256 and the second narrowing region 1257. Among them, the first narrowing region 1256 is used for initially breaking the wire coating insulation, and the second narrowing region 1257 is configured to be able to break the wire coating insulation again and / or clamp the electrical connection region 112.

[0133] Both the first narrowing region 1256 and the second narrowing region 1257 have sharp corner edges, so as to be able to break the wire coating insulation.

[0134] Especially as Figure 12 As shown, according to an exemplary embodiment of the present invention, the notch 125 includes a third narrowing region 1259 located between the locally widened notch structure 1255 and the wire acting region 1251.

[0135] The third narrowing region 1259 is relatively narrow with respect to the locally widened notch structure 1255, and this region mainly functions to separate the two holding arms 124. The relatively wide locally widened notch structure 1255 can make the elastic clamping effect of the two holding arms 124 stronger.

[0136] As shown in the figure, according to an exemplary embodiment of the present invention, the locally widened notch structure 1255 has an edge that is at least partially arc-shaped.

[0137] According to an exemplary embodiment of the present invention, the holding arm 124 has a local widening structure 1241 at the break opening 1254 for locally enhancing the structural strength.

[0138] Especially as Figure 9 As shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 further includes a locking structure 126 located at or adjacent to the base 123 for generating a locking effect after the assembly operation is completed.

[0139] Preferably, the locking structure 126 can be configured as a barb structure.

[0140] Especially as Figure 9 As shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 further includes a locally widened belt structure 127 located at or adjacent to the base 123, allowing a plurality of electrical connection brackets 12 to be pre-connected together before the assembly operation.

[0141] In this case, a plurality of electrical connection brackets 12 are formed by co-stamping and pre-connected together through a belt structure 127. In other words, a plurality of electrical connection brackets 12 can be formed by stamping a single blank, and after stamping, they are interconnected through the belt structure 127, and the belt structure 127 is disconnected during use.

[0142] In particular, as Figure 9 shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 further includes a pin 128 that extends reversely from the base 123 relative to the holding arm 124.

[0143] As Figures 9 - 12 shown, according to an exemplary embodiment of the present invention, the electrical connection bracket 12 has a symmetric structure.

[0144] According to an exemplary embodiment of the present invention, the total diameter of the wire of the coil 11 is in the range of 0.365 mm to 1.713 mm.

[0145] According to an exemplary embodiment of the present invention, the diameter of the conductive core of the wire of the coil 11 is in the range of 0.32 mm to 1.628 mm.

[0146] According to an exemplary embodiment of the present invention, the thickness of the insulating material coated on the wire is in the range of 0.041 mm to 0.081 mm.

[0147] According to an exemplary embodiment of the present invention, the number of strands of the conductive core of the wire of the wire coil 11 is 1 or 2.

[0148] According to an exemplary embodiment of the present invention, the operating voltage of the motor 1 is in the range of 8 V to 60 V.

[0149] According to an exemplary embodiment of the present invention, the maximum speed of the motor 1 is 15000 rpm.

[0150] According to certain exemplary embodiments of the present invention, the delta connection method allows the coil to use thinner wires, and thus, the wires are easier to wind into coils. Therefore, this motor structure is compact and has a small weight, which is very advantageous. In addition, the electrical connection bracket 12 is arranged inside the stator, which can save more space, so that the motor can be conveniently arranged on a printed circuit board (as described below), and the arrangement of electronic components on the printed circuit board will become more flexible.

[0151] According to a second aspect of the present invention, there is provided a fan, in particular for a seat ventilation system or a battery cooling system of a vehicle, the fan including a motor 1 according to any of the above exemplary embodiments.

[0152] According to an exemplary embodiment of the present invention, the fan further includes a controller (not shown), and the electrical connection bracket 12 of the motor 1 is electrically connected to the controller.

[0153] According to an exemplary embodiment of the present invention, the controller is configured as a printed circuit board, and the electrical connection bracket 12 is plugged into the printed circuit board.

[0154] Although specific embodiments of the present invention have been described in detail herein, they are given for purposes of explanation only and should not be considered as limiting the scope of the present invention. Various substitutions, alterations, and modifications can be conceived without departing from the spirit and scope of the present invention.

Claims

1. An electric motor (1) for a fan, comprising: Three sets of coils (11), each set of coils (11) including at least one sub - coil (111) and having an electrical connection region (112) that is electrically connected to the corresponding other sets of coils (11); and At least one electrical connection bracket (12), the electrical connection bracket (12) being configured to allow, through its own assembly operation, especially only through its own assembly operation, to automatically break the wire coating insulation of the electrical connection regions (112) to be electrically connected to each other, especially the wire end regions, and to cause the electrical connection regions (112) to make electrical connection with each other.

2. The electric motor (1) according to claim 1, wherein, The stator of the electric motor (1) includes the coils (11), an iron core (13), and a holding structure (14) fixed relative to the iron core (13), and the electrical connection bracket (12) is assembled on the holding structure (14).

3. The electric motor (1) according to claim 2, wherein, The holding structure (14) is integrally formed on the iron core (13); and / or The coils (11) are held on the holding structure (14); and / or The holding structure (14) includes a receiving seat (141) for receiving the electrical connection bracket (12) in an interference - fit manner.

4. The electric motor (1) according to claim 3, wherein, The holding structure (14) is injection - molded, especially over - molded, onto at least a part of the iron core (13); and / or The receiving seat (141) is configured as a protruding structure, especially an axially protruding structure; and / or The receiving seat (141) is configured to have a receiving groove (1411), the electrical connection region (112) is positioned within the receiving groove (1411), and the electrical connection bracket (12) is interference - fitted into the receiving groove (1411) and presses the electrical connection region (112).

5. The electric motor (1) according to claim 4, wherein, The receiving groove (1411) includes a first groove (1412) for receiving the electrical connection bracket (12) and a second groove (1413) for receiving the electrical connection region (112), and the first groove (1412) intersects and communicates with the second groove (1413); and / or All the receiving seats (141) are preferably circumferentially evenly located on the same end side of the holding structure (14); and / or The receiving seat (141) is arranged radially inward relative to the coils (11).

6. The electric motor (1) according to claim 5, wherein, The first groove (1412) intersects the second groove (1413) perpendicularly; and / or The electrical connection region (112) is located at the bottom of the second groove (1413); and / or The electrical connection region (112) is radially inwardly embedded in the second groove (1413); and / or The first groove (1412) axially extends and is open at the free end (1414) of the receiving seat (141) to allow the electrical connection bracket (12) to be inserted from the free end (1414); and / or The second groove (1413) radially penetrates; and / or The second groove (1413) extends axially and is open at the free end (1414) of the receiving seat (141) to allow the electrical connection region (112) to slide axially to the bottom of the second groove (1413).

7. The electric machine (1) according to any one of claims 1-6, wherein each group of coils (11) includes a plurality of, in particular three, sub-coils (111) connected in series with each other; and / or the three groups of coils (11) are connected in a triangular connection; and / or an electrical connection is established between any two of the three groups of coils (11) through the electrical connection bracket (12).

8. The electric machine (1) according to any one of claims 1-7, wherein the electrical connection bracket (12) is configured as a plug-in component; and / or the electrical connection bracket (12) is configured as an integral component; and / or the electrical connection bracket (12) is configured as a sheet; and / or the electrical connection bracket (12) is made of a conductive material; and / or the electrical connection bracket (12) is formed by stamping; and / or the electrical connection bracket (12) is configured to be locked after an assembly operation.

9. The electric machine (1) according to claim 8, wherein the electrical connection bracket (12) has a cutting structure (121) for breaking the insulation of the wire covering and a clamping structure (122) for firmly holding the electrical connection region (112); and / or the electrical connection bracket (12) is configured to have a protruding portion, in particular an axially protruding portion, which is exposed and externally connected to electricity in the assembled state.

10. The electric machine (1) according to claim 8 or 9, wherein the electrical connection bracket (12) includes a base (123) and two holding arms (124) extending side by side and spaced apart from the base (123), and a notch (125) is formed between the two holding arms (124).

11. The electric machine (1) according to claim 10, wherein the notch (125) includes a wire acting region (1251) for acting on the electrical connection region (112) during the assembly process; and / or the notch (125) includes an elastic clamping enhancement region (1252) for enhancing the elastic clamping action between the two holding arms (124).

12. The electric machine (1) according to claim 11, wherein the wire acting region (1251) includes an initial receiving port (1253) for initially guiding the electrical connection region (112) into the notch (125) during the assembly process and a breaking port (1254) for subsequently breaking the insulation of the wire of the electrical connection region (112) entering through the initial receiving port (1253); and / or the elastic clamping enhancement region (1252) includes a locally widened notch structure (1255) adjacent to the base (123) and located at the bottom of the notch (125).

13. The electric machine (1) according to claim 12, wherein The initial receiving port (1253) is configured to flare out in a direction away from the base (123); and / or The breaking port (1254) includes a first narrowing region (1256), a second narrowing region (1257), and a locally widened region (1258) located between the first narrowing region (1256) and the second narrowing region (1257), wherein the first narrowing region (1256) is for initially breaking the wire insulation, and the second narrowing region (1257) is configured to be able to break the wire insulation again and / or clamp the electrical connection region (112); and / or The notch (125) includes a third narrowing region (1259) located between the locally widened notch structure (1255) and the wire acting region (1251); and / or The locally widened notch structure (1255) has an edge that is at least partially arcuate.

14. The electric machine (1) according to any one of claims 10 - 13, wherein, The holding arm (124) has a locally widened structure (1241) at the breaking port (1254) for locally enhancing the structural strength; and / or The electrical connection bracket (12) further includes a locking structure (126) located at or adjacent to the base (123) for generating a locking effect after the assembly operation is completed; and / or The electrical connection bracket (12) further includes a locally widened belt structure (127) located at or adjacent to the base (123) to allow a plurality of electrical connection brackets (12) to be pre - connected together before the assembly operation; and / or The electrical connection bracket (12) further includes a pin (128) extending reversely from the base (123) relative to the holding arm (124).

15. The electric machine (1) according to claim 14, wherein, The locking structure (126) is configured as a barb structure; and / or A plurality of electrical connection brackets (12) are formed by co - stamping and pre - connected together through the belt structure (127).

16. The electric machine (1) according to any one of claims 1 - 15, wherein, The electrical connection bracket (12) has a symmetric structure; and / or The electrical connection region (112) is a continuous section of the wire of the coil (11).

17. The electric machine (1) according to any one of claims 1 - 16, wherein, The total diameter of the wire of the coil (11) is in the range of 0.365 mm to 1.713 mm; and / or The diameter of the conductive core of the wire of the coil (11) is in the range of 0.32 mm to 1.628 mm; and / or The thickness of the wire insulation is in the range of 0.041 mm to 0.081 mm; and / or The number of strands of the conductive core of the wire of the coil (11) is 1 or 2; and / or The operating voltage of the electric machine (1) is in the range of 8V to 60V; and / or The maximum rotational speed of the electric machine (1) is 15000 rpm.

18. A fan, in particular for a seat ventilation system or a battery cooling system of a vehicle, comprising an electric machine (1) according to any one of claims 1-17.

19. The fan according to claim 18, wherein the fan further comprises a controller, and an electrical connection bracket (12) of the electric machine (1) is electrically connected to the controller.

20. The fan according to claim 19, wherein the controller is configured as a printed circuit board, and the electrical connection bracket (12) is plugged onto the printed circuit board.

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