Fixing device and fixing method for motor and stator winding connecting wire thereof

Abstract

The present invention provides a fixing device and a fixing method for a motor and a stator winding connecting wire thereof. The fixing device includes an insulating bracket for connecting to the stator winding, the insulating bracket is circumferentially arranged on one end of the stator winding; and a single binding wire, the single binding wire is used to form a plurality of circumferential binding structures for the connecting wire of the stator winding to pass through in sequence, and is configured to be connected and pre-tightened at both ends to bind and fix the connecting wire to the insulating bracket along the circumference of the stator winding. The present invention uses a single binding wire to bind and fix the connecting wire of the stator winding, thereby preventing the connecting wire from being displaced relative to the stator winding, ensuring the stability of the insulation resistance of the connecting wire, and thus improving the reliability of the motor. In addition, the binding wire is only tied at both ends, and the production efficiency is high. In addition, the method of cross-wrapped binding to fix the connecting wire has high reliability, which further improves the reliability of the motor.

Description

Technical Field

[0001] The present invention relates to the field of motors, and in particular to a fixing device and a fixing method for a motor and a stator winding connecting wire thereof. Background Art

[0002] The concentrated winding permanent magnet synchronous motor has the advantages of simple winding structure, small winding end, small end resistance, etc., and its efficiency is better than that of the distributed winding motor. The stator assembly of the existing concentrated winding permanent magnet synchronous motor includes three parts: stator core, winding coil and lead wire.

[0003] In order to facilitate the protection of the winding, an insulating bracket is usually provided at one end of the existing stator core. The insulating bracket has a plurality of winding teeth, and the winding teeth correspond to the teeth of the stator core one by one. The winding coil is surrounded and embedded on the teeth of the stator core and the winding teeth of the insulating bracket. Furthermore, the multiple winding coils of each phase are connected to each other through transition wires, and are led out of the stator assembly through lead wires. The multiple winding coils are also connected to each other through a neutral line.

[0004] However, the existing stator assembly has the problem that the wiring harness of the transition wire, neutral wire and lead wire between the winding coils is difficult to locate and fix, and the fixation is cumbersome and time-consuming. In order to solve this problem, the transition wire and lead wire are generally fixed by multiple binding wires, and the neutral wire is fixed by embedding between the winding coils, but this may reduce the insulation resistance due to the friction between the connecting wire and the slot, thereby causing a short circuit.

[0005] Therefore, it is necessary to develop a new type of fixing device and fixing method for the motor and its stator winding connecting wires, so as to fix various connecting wires of the stator winding more quickly, conveniently, reliably and firmly. Summary of the invention

[0006] The object of the present invention is to provide a fixing device and a fixing method for a motor and a stator winding connecting wire thereof, so as to solve the problems that the connecting wire harness of the existing concentrated winding motor winding is difficult to locate and fix, and the fixing is cumbersome and time-consuming.

[0007] In order to solve the above technical problems, the present invention provides a fixing device for stator winding connecting wires, comprising:

[0008] An insulating bracket for connecting to the stator winding, wherein the insulating bracket is circumferentially arranged around one end of the stator winding; and

[0009] A single binding wire is used to form a plurality of surrounding binding structures for the connecting wires of the stator winding to pass through in sequence, and is configured to be connected and pre-tightened at both ends so as to bind and fix the connecting wires on the insulating bracket along the circumference of the stator winding.

[0010] Optionally, the insulating bracket has a fixing portion for positioning and fixing the single binding wire.

[0011] Optionally, the fixing portion includes a plurality of fixing holes for the single binding wire to pass through, and the fixing holes are distributed along the circumference of the insulating bracket.

[0012] Optionally, the fixing portion further includes a plurality of fixing grooves, which are distributed along the circumference of the insulating bracket; the fixing grooves are farther away from the stator winding than the fixing holes in the axial direction of the insulating bracket, and the number of the fixing grooves is the same as the number of the fixing holes;

[0013] Wherein: the single binding wire is used to enter the inner side of the insulating bracket after passing through one of the fixing holes, and then go around from the side of the connecting wire close to the stator winding to the other side of the connecting wire away from the stator winding, and further pass through the fixing groove and pass through to the outside of the insulating bracket, so that the connecting wire is surrounded by the single binding wire and tied and fixed to the insulating bracket.

[0014] Optionally, the fixing groove and the fixing hole correspond to each other in the circumferential direction of the insulating bracket.

[0015] Optionally, the fixing hole includes a first fixing hole, a second fixing hole and a plurality of third fixing holes, wherein the first fixing hole, the plurality of third fixing holes and the second fixing hole are sequentially arranged on the insulating bracket along a predetermined direction;

[0016] Wherein: the axial distances between the first fixing hole and the second fixing hole and the stator winding are the same, and are greater than or equal to the axial distance between the third fixing hole and the stator winding.

[0017] Optionally, any one of the third fixing holes is located between adjacent winding teeth of the stator winding, and at most one of the third fixing holes is arranged between adjacent winding teeth.

[0018] Optionally, the single binding wire is a bundle of one or more wires.

[0019] In addition, in order to solve the above technical problems, the present invention also provides a motor, comprising a fixing device for stator winding connecting wires as described in any one of the above items.

[0020] Optionally, the motor is a permanent magnet synchronous motor.

[0021] In addition, in order to solve the above technical problems, the present invention also provides a method for fixing a stator winding connecting wire, comprising:

[0022] providing a stator winding, and an insulating bracket disposed around one end of the stator winding; and,

[0023] A single binding wire is arranged on the insulating bracket, and the connecting wire of the stator winding is passed through a plurality of surrounding binding structures formed by the single binding wire. Then, the two ends of the single binding wire are connected and pre-tightened so as to bind and fix the connecting wire on the insulating bracket along the circumference of the stator winding.

[0024] Optionally, the insulating bracket is provided with a first fixing hole, a second fixing hole and a plurality of third fixing holes, and the first fixing hole, the plurality of third fixing holes and the second fixing hole are sequentially arranged circumferentially on the insulating bracket along a predetermined direction; and the step of circumferentially binding and fixing the connecting wire on the stator winding to the insulating bracket with a single binding wire comprises:

[0025] Inserting the first end of the single binding wire into the first fixing hole and tying a knot, so that the first end of the single binding wire is fixedly connected to the insulating bracket;

[0026] Then, the second end of the single binding wire passes through the first fixing hole from the outside of the insulating bracket, surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends along the predetermined direction toward the circumference of the stator winding and passes through the first of the third fixing holes;

[0027] After passing through the first third fixing hole, the second end of the single binding wire surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends in the circumferential direction of the stator winding according to the predetermined direction and passes through the next adjacent third fixing hole, and repeats this step until the second end of the single binding wire passes through the last third fixing hole;

[0028] After passing through the last third fixing hole, the second end of the single binding wire surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends in the circumferential direction of the stator winding according to the predetermined direction and passes through the second fixing hole;

[0029] After passing through the second fixing hole, the second end of the single binding wire surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends in the circumferential direction of the stator winding according to the predetermined direction and passes through the first fixing hole;

[0030] Finally, the second end of the single binding wire is tied to the first end to fix it and provide pre-tightening.

[0031] Optionally, the step of encircling the second end of the single binding wire around the insulating bracket to form a surrounding binding structure for the connecting wire to pass through, and then extending the second end of the single binding wire in the circumferential direction of the stator winding in the predetermined direction includes:

[0032] The second end of the single binding wire passes through a corresponding fixing hole from the outside of the insulating bracket and enters the inside of the insulating bracket. Then, the second end of the single binding wire goes around from the side of the connecting wire close to the stator winding to the other side of the connecting wire away from the stator winding, and then passes through the insulating bracket, crosses and hooks with itself to form a surrounding binding structure for the connecting wire to pass through, so that the connecting wire is bound and fixed to the insulating bracket;

[0033] After forming the encircling binding structure, the second end of the single binding wire extends toward the circumference of the stator winding in the predetermined direction to be inserted into the next corresponding fixing hole.

[0034] Optionally, the insulating bracket is further provided with a plurality of fixing grooves, the fixing grooves are distributed along the circumference of the insulating bracket, the fixing grooves are farther away from the stator windings along the axial direction of the insulating bracket than all the fixing holes, and the number of the fixing grooves is the same as the number of the fixing holes, wherein the steps of forming one of the encircling binding structures include:

[0035] The second end of the single binding wire passes through a corresponding fixing hole from the outside of the insulating bracket and enters the inside of the insulating bracket. Then, the second end of the single binding wire goes around from the side of the connecting wire close to the stator winding to the other side of the connecting wire away from the stator winding, and then passes through a corresponding fixing slot and out to the outside of the insulating bracket.

[0036] In summary, the fixing device and fixing method of the motor and the stator winding connecting wire thereof provided by the present invention have the following beneficial effects:

[0037] First, the present invention uses a single binding wire to bind and fix the connecting wire of the stator winding on the insulating bracket along the circumferential direction, and the two ends of the connecting wire are connected and pre-tightened, and the connecting wire is bound around the middle. Such a binding method can prevent the connecting wire from moving in all directions of the stator winding, especially preventing the movement in the axial and radial directions of the stator winding. Therefore, the position of the connecting wire is effectively fixed, thereby avoiding friction caused by the displacement of the connecting wire, resulting in a reduction in the insulation resistance of the connecting wire, thereby causing the problem of motor leakage, thereby improving the reliability of the motor;

[0038] Second, the single binding wire of the present invention is only tied at the head and tail, which saves the time of binding and knotting, improves the production efficiency, and adopts a surrounding binding structure to pass the connecting wire in the middle, which can improve the reliability of binding, thereby further improving the reliability of the motor;

[0039] Third, the insulating bracket of the present invention is preferably provided with a fixing hole and a fixing groove, which can limit a single binding wire from sliding along the circumference of the insulating bracket, prevent the binding wire from loosening, and further prevent the winding connecting wire from being loosely fixed, thereby further improving the reliability of the motor; in addition, the setting of the fixing groove can also limit the connecting wire from exceeding the upper end surface of the insulating bracket, which is convenient for the subsequent installation of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0041] Figure 1 is a schematic diagram of a stator assembly provided in a preferred embodiment of the present invention;

[0042] Figure 2 yes Figure 1 A schematic diagram of an insulating bracket on a stator assembly is shown;

[0043] Figure 3 It is a schematic diagram of threading to form a surrounding binding structure provided by a preferred embodiment of the present invention;

[0044] Figure 4 yes Figure 3 The cross-sectional view of the encircling lashing structure shown is taken along the line aa;

[0045] Figure 5 yes Figure 3 An expanded view of a single lashing wire of a wrap-around lashing arrangement is shown.

[0046] In the figure:

[0047] 01- stator winding; 02- winding teeth; 10- insulating bracket; 11- fixing part; 111- first fixing hole; 112- second fixing hole; 113- third fixing hole; 114- first fixing slot; 115- second fixing slot; 20- single binding wire; 21- surrounding binding structure; 30- connecting wire; 31- lead wire. DETAILED DESCRIPTION

[0048] The fixing device and fixing method of the motor and the stator winding connecting wire thereof proposed by the present invention are further described in detail below in conjunction with the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more clear according to the following description.

[0049] It should be noted that the drawings are all in very simplified form and in non-precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structures shown in the drawings are often part of the actual structures. In particular, the emphasis of each drawing is different, and sometimes different proportions are used.

[0050] As used in the appended claims and this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in the appended claims and this specification, the term "or" is generally employed in its sense including "and / or" unless the content clearly dictates otherwise.

[0051] Please refer to Figure 1 and Figure 2 ,in, Figure 1 is a schematic diagram of a stator assembly of a preferred embodiment of the present invention, Figure 2 yes Figure 1 Schematic diagram of the insulation bracket on the stator winding. Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a stator assembly of a motor, the stator assembly includes a stator core, a stator winding 01, and a fixing device for fixing a connecting wire 30 on the stator winding 01. The stator winding 01 here includes a plurality of winding coils and connecting wires 30 between the winding coils. The connecting wires 30 specifically include transition wires, neutral wires, and a portion of lead wires 31 arranged along the circumference of the stator winding 01, wherein the transition wire refers to the connection between the plurality of winding coils of each phase, the neutral wire is the connection between each winding coil and the neutral point of the entire stator winding 01, and the lead wire 31 refers to the connection for leading the stator winding 01 outward and supplying power to the entire stator winding 01. Generally, the lead wires 31 are three according to different phases, and the transition wires are connected to different lead wires 31 according to different phases of each winding coil. A portion of the lead wires 31 is arranged along the circumference of the stator winding 01, and then bent along the axial direction of the stator winding 01 and extended to the outside of the stator winding 01. In the present invention, the fixing device includes a single binding wire 20 and an insulating bracket 10. In actual application, the insulating bracket 10 is connected to the stator winding 01 and is circumferentially arranged at one end of the stator winding 01, that is, the insulating bracket 10 is an annular structure, which is coaxially arranged with the stator winding 01, and the single binding wire 20 is arranged on the insulating bracket 10, and is used to bind and fix the connecting wire 30 on the insulating bracket 10 along the circumference of the stator winding 01.

[0052] In particular, when the connecting wire 30 is tied and fixed, the single binding wire 20 cooperates with the insulating bracket 10 to sequentially form a plurality of surrounding binding structures 21 (see Figure 5), so that the connecting wire 30 is passed through these surrounding binding structures 21, and then the two ends of the single binding wire 20 are fixedly connected (such as knotted) and pre-tightened, so that the single binding wire 20 can be tightened as a whole, so that the connecting wire 30 is firmly tied to the insulating bracket 10. Here, when the single binding wire 20 actually passes through the insulating bracket 10, the surrounding binding structure 21 is formed.

[0053] Compared with the prior art, the binding structure provided by the present invention can prevent the connecting wire 30 from moving in all directions of the stator winding 01, especially in the axial and radial directions of the stator winding 01, so that the position of the connecting wire 30 is effectively fixed, which can avoid friction caused by the displacement of the connecting wire 30, resulting in a reduction in the insulation resistance of the connecting wire 30, thereby causing the problem of motor leakage, thereby improving the reliability of the motor. In addition, a single binding wire is only tied at both ends, which saves the time of binding and knotting, improves production efficiency, and the use of a surrounding binding structure in the middle to pass the connecting wire can improve the reliability of binding and fixing, thereby further improving the reliability of the motor.

[0054] In the embodiment of the present invention, the insulating bracket 10 can have various shapes. For example, it can be an annular member, one end of which is connected and fixed to the stator winding 01, or it can be a plurality of dispersed fixing members, and the plurality of fixing members are evenly arranged circumferentially along one end of the stator winding 01 to form a ring. Such a structure makes it easier to evenly fix the connecting wire 30 along the circumference of the stator winding 01 in the subsequent process.

[0055] Continue to refer Figure 1 and Figure 2 , the fixing device of the stator winding connecting wire is further explained.

[0056] The insulating support 10 has a fixing portion 11, which is used to locate and fix the position of the single binding wire 20 on the insulating support 10. The fixing portion 11 can be composed of a plurality of dispersed sub-fixing portions, each of which includes a component that can be passed through or tied and fixed by the single binding wire 20. For example, the sub-fixing portion can be a ring, a U-shaped clamp, a groove, a hole, a protrusion, a hook, a clamp or a clip, etc., arranged on the insulating support 10, or a combination of multiple components. The present invention does not limit the specific structure of the fixing portion 11, as long as its structure can be passed through or tied and fixed by the single binding wire 20.

[0057] Preferably, the fixing portion 11 includes a plurality of fixing holes provided on the insulating support 10 , and the plurality of fixing holes are distributed along the circumference of the insulating support 10 and are used for allowing the single binding wire 20 to pass therethrough.

[0058] Furthermore, the fixing portion 11 also includes a plurality of fixing grooves, which are also distributed along the circumference of the insulating support 10, and the fixing grooves are farther away from the stator winding 01 than the fixing holes along the axial direction of the insulating support 10. Specifically, the fixing grooves are arranged at the other end of the insulating support 10 away from the stator winding 01. The number of the fixing grooves is the same as the number of the fixing holes. Preferably, each of the fixing grooves is distributed along the axial direction of the insulating support 10 with a corresponding fixing hole, that is, the positions of the fixing grooves and the fixing holes on the circumference of the insulating support correspond to each other. More specifically, although the two are distributed in different axial directions, when projected to the same circumference, the fixing grooves and the fixing holes overlap (overlap does not mean complete coverage, but means position overlap). In other embodiments, the positions of the fixing holes and the fixing grooves on the circumference may also be staggered. Compared with the circumferentially staggered solution, the circumferentially overlapping solution has a better fixing effect.

[0059] like Figure 4 As shown, the single binding wire 20 enters the inner side of the insulating bracket (the side close to the axis) after passing through one of the fixing holes, and then goes around from the side of the connecting wire 30 close to the stator winding 01 to the other side of the connecting wire 30 away from the stator winding 01, and further passes through the fixing groove and passes through to the outside of the insulating bracket 10, so that the connecting wire 30 is surrounded by the single binding wire 20 and can be tied and fixed to the insulating bracket 10.

[0060] Furthermore, the fixing hole includes a first fixing hole 111, a second fixing hole 112 and a third fixing hole 113, the first fixing hole 111 and the second fixing hole 112 are each one, and the third fixing hole 113 is multiple. The fixing groove includes a first fixing groove 114 and a second fixing groove 115, the second fixing groove 115 is two, and the first fixing groove 114 is multiple.

[0061] One first fixing hole 111, a plurality of the third fixing holes 113, and one second fixing hole 112 are sequentially arranged circumferentially on the insulating bracket 10 along a predetermined direction. Here, when the plurality of third fixing holes 113 are arranged, they are also sequentially arranged circumferentially along a predetermined direction. In addition, in the present invention, the predetermined direction can be the counterclockwise direction along the circumference of the stator winding 01, or the clockwise direction along the circumference of the stator winding 01. In addition, the axial distances between the first fixing hole 111 and the second fixing hole 112 and the stator winding 01 are generally the same, and are greater than or equal to the axial distance between the third fixing hole 113 and the stator winding 01. Here, a fixing hole and a fixing slot correspond to each other in the axial direction of the stator winding 01. The fixing hole is used for a single binding wire 20 to pass through, while the fixing slot is used for a single binding wire 20 to be clamped inside. The two are used together to limit the circumferential and axial position of the single binding wire 20 in the stator winding 01, and then the position of the connecting wire 30 is limited by the single binding wire 20.

[0062] In practice, since a portion of the lead wire 31 needs to be bent along the axial direction of the stator winding 01 and then extend to the outside of the stator winding 01, in order to facilitate the fixation of the bent portion, the fixing holes and fixing grooves are divided into two categories. The first fixing hole 111 and the second fixing hole 112 and the corresponding second fixing groove 115 are of one type, which are used to bind and fix the portion of the lead wire 31 close to the bend. The third fixing hole 113 and the first fixing groove 114 are of one type, which are used to bind and fix the portion of the lead wire 31 arranged along the circumferential direction of the stator winding 01, as well as the transition line and the neutral line. Therefore, one second fixing groove 115 is used in conjunction with one first fixing hole 111, another second fixing groove 115 is used in conjunction with one second fixing hole 112, and multiple third fixing holes 113 are used in conjunction with multiple first fixing grooves 114, and finally the binding and fixation of the connecting wire 30 is completed.

[0063] Generally, the lead wire 31 is the total input wire of the stator winding 01, which is relatively thick, and is bent and extended in the direction away from the stator winding 01. Therefore, the first fixing hole 111 and the second fixing hole 112 can be relatively far away from the stator winding 01 in the axial direction, so that the lead wire 31 can be bent and led out to the outside of the stator winding 01 after being tied at the first fixing hole 111 and the second fixing hole 112. However, there are a large number of connecting wires 30 (including the part of the lead wire 31 arranged along the circumference of the stator winding 01, as well as the transition line and the neutral line), and these connecting wires 30 are generally arranged at one end of the stator winding 01 in the circumferential direction. Therefore, the fixing hole (i.e., the third fixing hole 113) used to tie this part of the connecting wire 30 can be relatively small in the axial distance from the stator winding 01. In this way, the distance between the third fixing hole 113 and its corresponding first fixing slot 114 can be relatively large to accommodate more connecting wires 30. In particular, the third fixing hole 113 is preferably located between the winding teeth 02 of the stator winding 01, but at most one third fixing hole 113 is provided between adjacent winding teeth 02, so that the fixing points of the connecting wire 30 are more uniform and the fixing effect is better. The third fixing hole 113 is used to bind and fix the connecting wire 30 between the sub-windings of the stator winding 01, and each winding coil of the stator winding 01 is respectively wound on each winding tooth 02 and the stator core. When the third fixing hole 113 is located between the winding teeth 02, a single binding wire 20 can easily pass through between the winding teeth 02 and tighten the connecting wire 30.

[0064] In the embodiment of the present invention, the single binding wire 20 is not limited to a wire harness, but may also be a wire harness of multiple wires twisted together.

[0065] Furthermore, an embodiment of the present invention also provides a method for fixing a stator winding connecting wire, which includes:

[0066] Step 1: providing a stator winding 01 and an insulating bracket 10 disposed around one end of the stator winding 01;

[0067] Step 2: a single binding wire is arranged on the insulating support 10, and the connecting wire 30 of the stator winding 01 is passed through a plurality of surrounding binding structures 21 formed by the single binding wire 20;

[0068] Step 3: Connect the two ends of the single binding wire 20 and provide pre-tightening, so that the connecting wire 30 can be tied and fixed on the insulating bracket 10 along the circumferential direction of the stator winding 01.

[0069] Going further, combined Figure 4 and Figure 5 For example, the specific steps of circumferentially binding and fixing the connecting wire 30 on the stator winding 01 to the insulating bracket 10 by the single binding wire 20 include:

[0070] Step A1: insert the first end of the single binding wire 20 into the first fixing hole 111 and tie a knot, so that the first end of the single binding wire 20 is fixedly connected to the insulating bracket 10;

[0071] Step A2: After the second end of the single binding wire 20 passes through the first fixing hole 111 from the outside of the insulating support 10, it surrounds the insulating support 10 and forms a surrounding binding structure 21 for the connecting wire 30 to pass through, and then extends along the predetermined direction toward the circumference of the stator winding 01 and passes through the first third fixing hole 113; here, the surrounding binding structure 21 is formed by the cross-connection of the single binding wire 20 itself, which can be a movable connection, that is, when the binding knots at both ends of the single binding wire 20 are opened, the entire binding wire can be pulled out by pulling;

[0072] Step A3: After passing through a third fixing hole 113, the second end of the single binding wire 20 is wrapped around the insulating bracket 10 to form a surrounding binding structure 21 for the connecting wire 30 to pass through, and then extended in the circumferential direction of the stator winding 01 in a predetermined direction and passed through the next adjacent third fixing hole 113, and this step is repeated until the second end of the single binding wire 20 passes through the last third fixing hole 113;

[0073] Step A4: After passing through the last third fixing hole 113, the second end of the single binding wire 20 surrounds the insulating bracket 10 and forms a surrounding binding structure 21 for the connecting wire 30 to pass through, and then extends in a predetermined direction in the circumferential direction of the stator winding 01 and passes through the second fixing hole 112;

[0074] Step A5: After passing through the second fixing hole 112, the second end of the single binding wire 20 surrounds the insulating bracket 10 and forms a surrounding binding structure 21 for the connecting wire 30 to pass through, and then extends in a predetermined direction in the circumferential direction of the stator winding 01 and passes through the first fixing hole 111;

[0075] Step A6: Finally, the second end of the single binding wire 20 is knotted and fixed with the first end and pre-tightened, thus completing the binding and fixing.

[0076] In this way, when the binding is specifically fixed, the single binding wire 20 is only tied and fixed at the two opposite ends, and the middle body part is tied and fixed to the connecting wire 30 through the cross-wrap binding structure 21, which reduces the number of knots, thereby saving the binding time and improving the production efficiency. In addition, since only the two opposite ends are tied, the middle body part is interlocked through the cross-wrap binding structure 21, as long as the knots at the two ends are not loose, the middle single binding wire 20 can be kept in a tight state, which is more reliable than the method of tying knots in multiple places with multiple binding heads.

[0077] Continue reading Figures 3 to 5, the wraparound lashing structure 21 is further explained. Figure 3 This is a schematic diagram of the threading of the cross-wrap type lashing structure of the preferred embodiment of the present invention. Figure 4 yes Figure 3 The cross-section of the wraparound lashing structure shown is taken along the line aa. Figure 5 yes Figure 3 The expanded view of a single lashing wire of the wraparound lashing structure is shown in FIG. Figure 3 and Figure 4 Taking a wraparound binding structure 21 as an example, the binding method of a single binding wire 20 specifically includes:

[0078] Step B1, pass the second end of the single binding wire 20 from the outside of the insulating bracket 10 through a third fixing hole 113, enter the inside of the insulating bracket 10, and then pass it between the connecting wire 30 and the stator winding 01 along the radial direction of the stator winding 01; Figure 4 As shown, after entering the inner side of the insulating bracket 10, the second end of the single binding wire 20 is located on the side of the connecting wire 30 close to the stator winding 01, that is, at the bottom in the figure;

[0079] Step B2: The second end of the single binding wire 20 is wound from one side of the connecting wire 30 close to the stator winding 01 to the other side of the connecting wire 30 away from the stator winding 01. That is, the second end of the single binding wire 20 is bent and extended along the axial direction of the stator winding 01 in a direction away from the stator winding 01 ( Figure 4 Then, the second end of the single binding wire 20 is bent and extended along the radial direction of the stator winding 01 in a direction away from the axis of the stator winding 01 ( Figure 4 In this case, the connecting wire 30 is limited between the single binding wire 20 and the insulating bracket 10;

[0080] Step B3, the second end of the single binding wire 20 further passes through the first fixing groove 114 and then passes through the insulating bracket 10, cross-connecting with itself to form a surrounding binding structure 21 for the connecting wire 30 to pass through, so that the connecting wire 30 is bound and fixed to the insulating bracket 10; wherein, cross-connecting with itself to form a surrounding binding structure 21 for the connecting wire 30 to pass through means that the second end of the single binding wire 20 is bent and extended along the axial direction of the stator winding 01 toward the direction of the stator winding 01 ( Figure 4 downward), cross-connected and tightened with a portion of the single binding wire 20 that previously penetrated into the third fixing hole 113, thereby forming a surrounding binding structure 21;

[0081] Step B4, after forming the encircling binding structure 21, the second end of the single binding wire 20 extends circumferentially of the stator winding 01 in a predetermined direction to penetrate into the next corresponding fixing hole.

[0082] Here, the degree of tightening of the single binding wire 20 is based on the ability to limit the displacement of the connecting wire 30 .

[0083] The surrounding binding structure 21 constrains the connecting wire 30 to the inner wall of the insulating bracket 10 along the radial direction of the stator winding 01 by passing a single binding wire 20 through a fixing hole, thereby preventing the connecting wire 30 from being displaced in the radial direction of the stator winding 01. At the same time, it can also constrain the connecting wire 30 to not exceed the upper end surface of the insulating bracket 10 (away from the end surface of the stator winding 01) to facilitate the subsequent assembly of the entire motor.

[0084] In addition, it is preferred that the single binding wire 20 has a rougher surface, such as using hemp rope, etc., which can also limit the circumferential movement of the connecting wire 30 along the stator winding 01 by friction. Furthermore, the third fixing hole 113 and the first fixing groove 114 matched therewith can limit the position of the single binding wire 20 to prevent the single binding wire 20 from sliding along the circumference of the insulating bracket 10, so that the connecting wire 30 can be tied more reliably and firmly, and the loosening due to the circumferential sliding of the single binding wire 20 along the insulating bracket 10 can be avoided. In addition, when the surrounding binding structure 21 is used for the first fixing hole 111, the second fixing hole 112 and the second fixing groove 115, the principle structure is the same as this, and it will not be repeated here.

[0085] Preferably, the shape of the second fixing groove 115 matching the first fixing hole 111 and the second fixing hole 112 may be different from the shape of the first fixing groove 114 matching the third fixing hole 113. For example, the second fixing groove 115 may be a semicircular groove, and the first fixing groove 114 may be a rectangular groove, etc., so that the positions of different fixing holes can be easily identified through fixing grooves of different shapes when installing and binding the connecting wire 30. Here, the portion of the lead wire 31 extending axially along the stator winding 01 is bound and fixed between the first fixing hole 111 and the second fixing hole 112. After being bound by a single binding wire 20, the lead wire 31 can be prevented from moving axially, radially and circumferentially along the stator winding 01, and the position of the lead wire 31 can be more accurately located. Of course, the shapes of the first fixing groove 114 and the second fixing groove 115 are not limited to the above shapes, and they can also be other shapes, such as triangle, rhombus, etc., or a combination of multiple different shapes. As long as they can play the role of fixing the single binding wire and can identify the difference, the present invention is not limited to this.

[0086] Finally, an embodiment of the present invention further provides a motor, which includes a fixing device for stator winding connecting wires provided in an embodiment of the present invention. Since the motor uses the fixing device for stator winding connecting wires provided in the present invention, please refer to the above embodiment for the beneficial effects brought by the fixing device for stator winding connecting wires. In addition, please refer to the prior art for other structures and working principles of the motor, which will not be described one by one here.

[0087] The motor provided in the embodiment of the present invention is mainly a permanent magnet synchronous motor, which has a high power density and a small size, so it is more necessary to reduce the winding size. Therefore, it is more suitable to use the fixing device for the stator winding connecting wire provided by the present invention, so as to better fix the connecting wire while reducing the winding size.

[0088] It should be noted that the above description is only a description of the preferred embodiment of the present invention, and is not any limitation to the scope of the present invention. Any changes and modifications made by ordinary technicians in the field of the present invention based on the above disclosure are within the scope of protection of the claims.

Claims

1. A fixing device for stator winding connecting wires, characterized in that: include: An insulating bracket for connecting to the stator winding, wherein the insulating bracket is circumferentially arranged around one end of the stator winding; and A single binding wire, the single binding wire is used to form a plurality of surrounding binding structures for the connecting wires of the stator winding to pass through in sequence, and is configured to be connected and pre-tightened at both ends so as to bind and fix the connecting wires on the insulating bracket along the circumference of the stator winding; the single binding wire is a bundle of one or more wires; The insulating bracket has a fixing portion for positioning and fixing the single binding wire, the fixing portion includes a fixing hole, and the fixing holes include a first fixing hole, a second fixing hole and a plurality of third fixing holes, wherein the first fixing hole, the plurality of third fixing holes and the second fixing hole are arranged in sequence on the insulating bracket along a predetermined direction; wherein the axial distance between the first fixing hole and the second fixing hole and the stator winding is the same, and is greater than or equal to the axial distance between the third fixing hole and the stator winding.

2. The fixing device for stator winding connecting wires according to claim 1, characterized in that: The fixing portion includes a plurality of fixing holes for the single binding wire to pass through, and the fixing holes are distributed along the circumference of the insulating bracket.

3. The fixing device for stator winding connecting wires according to claim 2, characterized in that: The fixing portion further comprises a plurality of fixing grooves, which are distributed along the circumference of the insulating support; the fixing grooves are farther away from the stator winding than the fixing holes along the axial direction of the insulating support, and the number of the fixing grooves is the same as the number of the fixing holes; Wherein: the single binding wire is used to enter the inner side of the insulating bracket after passing through one of the fixing holes, and then go around from the side of the connecting wire close to the stator winding to the other side of the connecting wire away from the stator winding, and further pass through the fixing groove and pass through to the outside of the insulating bracket, so that the connecting wire is surrounded by the single binding wire and tied and fixed to the insulating bracket.

4. The fixing device for stator winding connecting wires according to claim 3, characterized in that: The fixing groove and the fixing hole correspond to each other in the circumferential direction of the insulating bracket.

5. The fixing device for stator winding connecting wires according to claim 1, characterized in that: Any one of the third fixing holes is located between adjacent winding teeth of the stator winding, and at most one of the third fixing holes is arranged between adjacent winding teeth.

6. A motor, characterized in that: The invention comprises a fixing device for stator winding connecting wires as claimed in any one of claims 1 to 5.

7. The motor according to claim 6, characterized in that The motor is a permanent magnet synchronous motor.

8. A method for fixing a stator winding connecting wire, characterized in that: include: Providing a stator winding and an insulating bracket arranged around one end of the stator winding; as well as A single binding wire is arranged on the insulating support, and the connecting wire of the stator winding is passed through a plurality of surrounding binding structures formed by the single binding wire, and then two ends of the single binding wire are connected and pre-tightened to bind and fix the connecting wire on the insulating support along the circumferential direction of the stator winding; The insulating bracket is provided with a first fixing hole, a second fixing hole and a plurality of third fixing holes, wherein the first fixing hole, the plurality of third fixing holes and the second fixing hole are sequentially arranged circumferentially on the insulating bracket along a predetermined direction; The step of circumferentially binding and fixing the connecting wires on the stator winding on the insulating support with a single binding wire comprises: Inserting the first end of the single binding wire into the first fixing hole and tying a knot, so that the first end of the single binding wire is fixedly connected to the insulating bracket; Then, the second end of the single binding wire passes through the first fixing hole from the outside of the insulating bracket, surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends along the predetermined direction toward the circumference of the stator winding and passes through the first of the third fixing holes; After passing through the first third fixing hole, the second end of the single binding wire surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends in the circumferential direction of the stator winding according to the predetermined direction and passes through the next adjacent third fixing hole, and repeats this step until the second end of the single binding wire passes through the last third fixing hole; After passing through the last third fixing hole, the second end of the single binding wire surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends in the circumferential direction of the stator winding according to the predetermined direction and passes through the second fixing hole; After passing through the second fixing hole, the second end of the single binding wire surrounds the insulating bracket and forms a surrounding binding structure for the connecting wire to pass through, and then extends in the circumferential direction of the stator winding according to the predetermined direction and passes through the first fixing hole; Finally, the second end of the single binding wire is tied to the first end to fix it and provide pre-tightening.

9. The method for fixing the stator winding connecting wire according to claim 8, characterized in that: The step of encircling the second end of the single binding wire around the insulating bracket to form a surrounding binding structure for the connecting wire to pass through, and then extending the second end of the single binding wire toward the circumference of the stator winding in the predetermined direction comprises: The second end of the single binding wire passes through a corresponding fixing hole from the outside of the insulating bracket and enters the inside of the insulating bracket. Then, the second end of the single binding wire goes around from the side of the connecting wire close to the stator winding to the other side of the connecting wire away from the stator winding, and then passes through the insulating bracket, crosses and hooks with itself to form a surrounding binding structure for the connecting wire to pass through, so that the connecting wire is bound and fixed to the insulating bracket; After forming the encircling binding structure, the second end of the single binding wire extends toward the circumference of the stator winding in the predetermined direction to penetrate into the next corresponding fixing hole.

10. The method for fixing the stator winding connecting wire according to claim 9, characterized in that: The insulating support is also provided with a plurality of fixing grooves, the fixing grooves are distributed along the circumference of the insulating support, the fixing grooves are farther away from the stator winding than all the fixing holes along the axial direction of the insulating support, and the number of the fixing grooves is the same as the number of the fixing holes, wherein the steps of forming one of the encircling binding structures include: The second end of the single binding wire passes through a corresponding fixing hole from the outside of the insulating bracket and enters the inside of the insulating bracket. Then, the second end of the single binding wire goes around from the side of the connecting wire close to the stator winding to the other side of the connecting wire away from the stator winding, and then passes through a corresponding fixing slot and out to the outside of the insulating bracket.

Images