Coil sheath, coil assembly and drainage motor

Abstract

The utility model discloses a coil sheath, a coil assembly and a drainage motor, the coil sheath comprises a sheath plate, the end face of one end of the sheath plate is provided with a wire groove used for guiding a connecting wire, and a wire outlet of the wire groove is provided with a boss protruding out of the end face of the sheath plate and a pin hole penetrating through the sheath plate; and the boss is used for lifting the connecting wire, so that a space for adsorbing tin liquid is formed between the welding end of the connecting wire and the sheath plate. According to the utility model, the boss is arranged at the wire outlet of the wire trough of the sheath plate, so that the crossed welding point of the welding ends of the contact pin and the connecting wire is in a suspended state relative to the surface of the sheath plate before welding, thereby facilitating the collection and adsorption of tin liquid, ensuring the welding reliability and welding quality, reducing the amount of the tin liquid, and facilitating the automatic tin soldering.

Description

Technical Field

[0001] The utility model relates to the technical field of motor design, in particular to a coil sheath, a coil component and a drainage motor. Background Art

[0002] The drainage motor is a key control component of the drainage system of the washing machine. The quality of the drainage motor is particularly important to the quality of the washing machine. The wiring harness, which transmits electrical energy and connects the drainage motor, is also called the connecting wire. The quality of the welding between the connecting wire and the motor coil assembly determines the quality of the entire drainage motor. In today's increasingly expensive labor costs and raw material prices, it is particularly important to seek a welding structure that is reliable, high-quality and low-cost.

[0003] The drainage motor mainly connects the synchronous motor coil assembly to the connecting wire through the coil sheath. The coil sheath currently used is described in CN205029458U in the prior art. The connecting wire can only be guided through the wire groove. The pin is bent first and then the external connecting wire is bent. The connecting wire is placed outside the pin. In this case, there will be a problem of the external connecting wire falling off, especially if the connecting wire is pulled manually, it is easier to fall off, which is not convenient for automatic welding. In addition, the connecting wires in this structure are mostly close to the surface of the coil sheath. When it is welded to the pin, the solder has poor adhesion, the welding quality is unstable, the amount of tin liquid is large, and the welding efficiency is low. In addition, the tin liquid cannot be guided during welding, which also leads to welding difficulties, excessive loss of welding materials, and low welding efficiency. Utility Model Content

[0004] In order to solve the technical problems of unstable welding quality between connecting wires and pins, large amount of tin liquid and low welding efficiency in the drainage motor in the prior art, the utility model provides a coil sheath, a coil assembly and a drainage motor to solve the above problems.

[0005] The utility model provides a coil sheath, comprising a sheath plate, wherein one end surface of the sheath plate is provided with a wire groove for guiding a connecting wire, a boss protruding from the end surface of the sheath plate and a pin hole penetrating the sheath plate are provided at a wire outlet of the wire groove; the boss is used to lift the connecting wire, so that a space for tin liquid to flow is reserved between the welding end of the connecting wire and the sheath plate.

[0006] The design of the boss makes the cross solder joints of the welding ends of the pins and the connecting wires suspended relative to the surface of the sheath plate before welding, which is conducive to the collection and adsorption of tin liquid, ensures the reliability and quality of welding, reduces the use of tin liquid, and facilitates automated soldering.

[0007] Furthermore, two wire ducts are symmetrically arranged, and the wire outlets of the two wire ducts extend in opposite directions.

[0008] Furthermore, each wire groove is correspondingly provided with a boss, and the wire groove, the boss and the pin hole are arranged along the direction in which the connecting wire extends out of the wire outlet, and the length direction of the boss is perpendicular to the direction in which the connecting wire extends out of the wire outlet.

[0009] Furthermore, each wire trough is provided with two bosses, and the wire trough and the two bosses are arranged along the direction in which the connecting wire extends out of the wire outlet, the pin hole is located between the two bosses, and the length direction of the two bosses is perpendicular to the direction in which the connecting wire extends out of the wire outlet.

[0010] Furthermore, an arc-shaped notch for placing the connecting wire is provided on the upper surface of the boss.

[0011] Furthermore, the upper surface of the boss is a convex arc surface.

[0012] Furthermore, a bending stopper is provided between the boss and the pin hole, and the side of the bending stopper facing the boss is an arc-shaped surface surrounding the outer surface of the pin.

[0013] Furthermore, assuming that the dimension of the boss perpendicular to the extending direction of the connection line is the length C of the boss, the width C of the boss is greater than the opening dimension of the outlet.

[0014] Furthermore, the height E of the boss is less than or equal to half the height of the wall of the wire groove.

[0015] Furthermore, the width F of the arc-shaped notch is greater than or equal to the diameter of the welding end.

[0016] The utility model also proposes a coil assembly, including a coil frame, a pin and the coil sheath mentioned above, one end of the pin is connected to the enameled wire of the coil frame, and the other end passes through the pin hole of the coil sheath and is bent and welded to the welding end of the connecting wire.

[0017] Furthermore, the pin is welded on the outside of the connecting wire.

[0018] Furthermore, the height of the bent end of the pin is smaller than the height of the welding point between the pin and the connecting wire.

[0019] Furthermore, the bending of the pin includes primary bending and secondary bending, wherein the primary bending bends the pin from a straight state toward the direction of the connecting line, and the secondary bending presses the end of the pin toward the surface of the sheath plate so that the middle of the pin fits with the connecting line.

[0020] Furthermore, the coil assembly includes a push pin facing the end surface of the sheath plate and a driving member driving the push pin to move closer to or away from the sheath plate, and the push pin presses the end of the pin during the secondary bending.

[0021] The utility model also provides a drainage motor, comprising the coil assembly mentioned above.

[0022] The beneficial effects of the utility model are:

[0023] (1) The coil sheath, coil assembly and drainage motor described in the utility model are provided with a boss at the outlet of the wire groove of the sheath plate, so that the cross solder joints of the welding ends of the pins and the connecting wires are in a suspended state relative to the surface of the sheath plate before welding, which is conducive to the collection and adsorption of tin liquid, ensures the reliability and quality of welding, reduces the amount of tin liquid used, and facilitates automated soldering.

[0024] (2) The utility model arranges the plug pin on the outside of the connecting wire and adopts a secondary bending method to ensure the fit between the plug pin and the connecting wire, thereby reducing the amount of tin during welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0026] Figure 1 It is an exploded view of a specific implementation of the drainage motor described in the utility model;

[0027] Figure 2 It is a three-dimensional diagram of the coil assembly of the utility model;

[0028] Figure 3 yes Figure 2 An exploded view of the coil assembly shown;

[0029] Figure 4 It is a schematic structural diagram of a coil sheath provided with a group of bosses in the utility model;

[0030] Figure 5 It is a schematic structural diagram of a coil sheath provided with two sets of bosses in the utility model;

[0031] Figure 6 yes Figure 5 A top view of the optimized boss in the coil sheath;

[0032] Figure 7 yes Figure 6 A front view of the coil sheath shown;

[0033] Figure 8 yes Figure 6 a side view of the coil sheath shown;

[0034] Fig. 9 This is a schematic diagram of the assembly of the connecting wire on the coil sheath when the pin is not bent;

[0035] Fig.10 When viewed from the left, Fig. 9 State diagram of

[0036] Fig.11 It is a schematic diagram of the inner end surface of the coil sheath of the utility model;

[0037] Fig.12 It is a three-dimensional diagram of the coil skeleton in the utility model;

[0038] Fig.13 It is a schematic diagram of the pre-assembly of the coil sheath and the coil frame in the utility model;

[0039] Fig.14 is a schematic diagram of the connection line;

[0040] Fig.15 It is a schematic diagram after the connection wire and the pin are assembled;

[0041] Fig.16 yes Figure 6 Schematic diagram of the dimensions of the coil sheath shown;

[0042] Fig.17 This is an ideal state diagram of the pin after one bending in the utility model;

[0043] Fig.18 This is a diagram of the actual state of the pin after one bending in the utility model;

[0044] Fig.19 This is a simplified diagram of the actual state of the pin after one bending;

[0045] Fig. 20 This is the state diagram of the pin after secondary bending;

[0046] Fig.21 It is a schematic diagram illustrating the principle of secondary bending of the pin by a push pin.

[0047] In the figure, 1, synchronous motor, 101, coil assembly, 102, rotor assembly, 2, traction system, 3, recovery control system, 4, housing, 5, housing cover, 6, fastening screws, 7, coil skeleton, 701, first positioning surface, 702, second positioning surface, 703, notch, 704, buckle, 8, coil sheath, 801, sheath plate, 802, wire groove, 803, outlet, 804, boss, 805, pin hole, 806, bend Stopper, 807, horizontal wall, 808, bent side wall, 809, partition wall, 810, first channel, 811, second channel, 812, first stopper, 813, second stopper, 814, third stopper, 815, slot, 9, claw plate, 10, housing, 11, connecting wire, 1101, insulating layer, 1102, welding end, 1103, partition surface, 12, pin, 13, arc surface, 14, arc notch, 15, push pin. DETAILED DESCRIPTION

[0048] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0049] like Figure 1 The figure shows a schematic diagram of the decomposition of the drainage motor. The main part of the drainage motor includes a synchronous motor 1, a traction system 2, a return control system 3, a shell 4, a shell cover 5 and a fastening screw 6. The coil assembly 101 in the synchronous motor 1 generates a magnetic field through electromagnetic induction to drive the rotor to rotate, serving as the driving source of the drainage motor and providing support and positioning for the gear set. The traction system 2 transmits the power of the rotor through the gear set to achieve the purpose of traction of the drainage motor. The return control system 3 controls the working mode of the motor through the transmission between the gears (power on for traction, power off for external load motor reset), the shell 4 and the shell cover 5 form a shell, providing a stable working environment for the synchronous motor 1 and the gear set, protecting the normal operation of the motor, and the fastening screw 6 is used as a fastener to fix the shell 4 and the shell cover 5.

[0050] like Figure 2 and Figure 3 As shown, the synchronous motor 1 includes a coil assembly 101 and a rotor assembly 102. The coil assembly 101 includes a coil frame 7, a coil sheath 8, a claw pole plate 9 and a housing 10. The housing 10 and the claw pole plate 9 are located at both ends of the coil frame 7. The coil frame 7 is wound with enameled wires, and the lead-out ends of the enameled wires are welded and fixed to the connecting wires 11 on the coil sheath 8 through the pins 12. Therefore, the coil sheath 8 is a key component for connecting the connecting wires 11 to the motor body, and the improvement of its structure is also the top priority of the present utility model.

[0051] like Figure 4 The figure shows the structure of the coil sheath 8 described in the utility model. The main body of the coil sheath 8 is a sheath plate 801, and the remaining structures are arranged on the sheath plate 801. One end face of the sheath plate 801 (the end face is facing away from the coil frame 7) has a wire groove 802 for guiding the connecting wire 11, and the wire outlet 803 of the wire groove 802 is provided with a boss 804 protruding from the end face of the sheath plate 801 and a pin hole 805 penetrating the sheath plate 801; the boss 804 is used to lift the connecting wire 11, so that there is a space for absorbing tin liquid between the welding end 1102 of the connecting wire 11 and the sheath plate 801.

[0052] like Figure 4 and Figure 6As shown, the coil sheath 8 in the present invention is the same as the conventional coil sheath 8, and the welding end 1102 of the connecting wire 11 extends out from the wire outlet 803 of the wire sheath 802, and the wire outlets 803 of the two wire sheaths 802 extend in opposite directions to avoid interference between the welding ends 1102 of the two connecting wires 11, as shown in FIG. Fig.14 As shown, the connecting wire 11 is covered with an insulating layer 1101, and the welding end 1102 is not covered with the insulating layer 1101, so the diameter of the insulating layer 1101 is larger than the diameter of the welding end 1102. After the welding end 1102 extends out of the outlet 803, the partition surface 1103 at the end of the insulating layer 1101 abuts against the inner end surface of the outlet 803.

[0053] The difference between the coil sheath 8 described in the utility model and the prior art is that bosses 804 are provided at the wire outlets 803 of the two wire grooves 802, so that the welding end 1102 of the connecting wire 11 can be lifted when the connecting wire 11 is put on the line, and a certain space is formed under the welding end 1102. The cross solder joints of the pin 12 and the welding end 1102 are in a suspended state relative to the surface of the sheath plate 801 before welding, which is conducive to the collection and adsorption of tin liquid, ensuring the reliability and quality of welding, reducing the amount of tin liquid used, and facilitating automatic soldering.

[0054] like Fig. 9 The figure shows the assembly diagram of the connecting wire 11 when the pin 12 is not bent. Fig. 9 It can be clearly seen from the state when the connection line 11 is assembled that the boss 804 provided in the present technical solution can obviously lift the welding end 1102 of the connection line 11 . Fig.10 For Fig. 9 From the state diagram observed from another angle, it can be clearly seen that there is a suspended space under the welding end 1102. Compared with the previous state (such as the flow of tin liquid cannot be controlled and flows randomly on the welding plane), the setting of the suspended space can effectively guide the tin liquid and make the tin liquid wrap the welding fulcrum, which effectively improves the quality of the welding wire and reduces the amount of tin used.

[0055] In the basic design, each wire groove 802 is provided with a boss 804, and along the direction in which the connecting wire 11 extends out of the wire outlet 803, the wire groove 802, the boss 804 and the pin hole 805 are arranged along the direction in which the connecting wire 11 extends out of the wire outlet 803, and the length direction of the boss 804 is perpendicular to the direction in which the connecting wire 11 extends out of the wire outlet 803. Figure 4As shown, a group of bosses 804 capable of lifting the welding end 1102 are arranged on both sides near the wire groove 802. The distance A from the boss 804 to the wire outlet 803 of the wire groove 802 should be sufficient in strength to lift the welding end 1102. Therefore, the boss 804 is selected to be arranged near the wire groove 802 and does not exceed the center line of the pin hole 805, that is, the boss 804 near the wire groove 802 is not arranged on the side away from the guide groove outside the center line.

[0056] In a more preferred design, each wire groove 802 is provided with two bosses 804. Figure 5 and Figure 6 As shown, in addition to a group of bosses 804 near the wire groove 802, another group of symmetrical bosses 804 is provided, the purpose of which is to guide the tin liquid on the basis of lifting the solder wire end, so that the tin liquid can gather between the two bosses 804 on one side, thereby improving the soldering efficiency. Since the tin liquid gathers between the two bosses 804 on one side, the soldering point between the pin 12 and the soldering end 1102 is located above the tin liquid, therefore, along the direction in which the connecting wire 11 extends out of the wire outlet 803, the pin hole 805 is preferably located between the two bosses 804.

[0057] like Figure 7 The figure shows a further optimization of the boss 804, where the upper surface of the boss 804 is a convex arc surface 13, that is, the shape of the surface of the boss 804 is changed to, for example, an arc shape, so that the tin liquid sprayed onto the boss 804 can flow better.

[0058] The optimization of the boss 804 also includes providing an arc-shaped notch 14 on the upper surface of the boss 804 for placing the connecting wire 11. Figure 8 As shown, a semicircular notch is provided in the middle of the boss 804, the purpose of which is to receive the welding end 1102 of the connecting wire 11 resting on the boss 804, so that the welding end 1102 falls into it and restricts its rolling. The width F of the arc notch 14 should be greater than or equal to the diameter of the welding end 1102. In addition, the width F of the arc notch 14 should not be too large. If it is too large, it will not play the role of limiting the protruding welding end 1102, and it will also cause the tin liquid to gather in the arc notch 14.

[0059] In the further optimized design of the coil sheath 8, a bending stopper 806 is provided between the boss 804 and the pin hole 805. Figure 6 As shown, the side of the bending block 806 facing away from the boss 804 is an arc-shaped surface surrounding the outer surface of the plug pin 12. The bending block 806 can effectively control the bending angle and direction of the plug pin 12, making the bent plug pin 12 more suitable for automation.

[0060] The improvement of the coil sheath 8 structure is the key to the present invention, and its size design is also very important.

[0061] like Fig.16 As shown, the dimension of the boss 804 perpendicular to the extending direction of the connecting wire 11 is defined as the length C of the boss 804 . The length C of the boss 804 is greater than the opening dimension of the wire outlet 803 , so that the connecting wire 11 can be placed on the boss 804 .

[0062] The distance D between the two bosses 804 on the same side should not be too large, otherwise the extended welding end 1102 cannot reach the two bosses 804, and should not be too small, otherwise the distance cannot achieve the effect of guiding the tin liquid.

[0063] The height E of the boss 804 should be less than or equal to half the height of the wall of the wire groove 802. In addition, the height E of the boss 804 is optimized, and the boss 804 should make the welding end 1102 approximately parallel to the end surface of the sheath plate 801 after lifting the welding end 1102.

[0064] The wire trough 802 is preferably configured to be L-shaped. As shown in the figure, the two symmetrically arranged wire troughs 802 are composed of a continuous horizontal wall 807, symmetrically arranged bent side walls 808 and a partition wall 809 vertically connected to the middle of the horizontal wall 807. The two ends of the horizontal wall 807 and one end of the two bent side walls 808 respectively form two wire outlets 803. Along the bending direction of the two bent side walls 808, with the wire outlet 803 as the starting point, the bent side walls 808, in turn, form a horizontal first channel 810 and a vertical second channel 811 with the horizontal wall 807 and the partition wall 809.

[0065] Online process:

[0066] like Figure 6 and Fig.15 As shown, the welding wire end of the connecting wire 11 passes through the wire outlet 803 on the sheath plate 801, and the welding wire end naturally falls on the boss 804 on the surface of the sheath plate 801. The separation surface 1103 between the welding wire end and the insulating layer 1101 presses against the inner end surface of the wire outlet 803. The connecting wire 11 enters the first channel 810 composed of the horizontal wall 807 and the front end of the bent side wall 808, and after naturally bending 90° at the corner, enters the second channel 811 composed of the rear half of the bent side wall 808 and the separation wall 809 separating the two sections of the welding wire end, and leads out of the coil sheath 8. The same is true for the other side.

[0067] Assembly of coil sheath 8 and coil frame 7:

[0068] like Figure 11-13As shown, the layout of the sheath plate 801 toward one end of the coil skeleton 7 is the same as that of the prior art, the pin 12 of the coil assembly 101 passes through the pin holes 805 symmetrically distributed on the coil sheath 8, the first positioning surface 701 and the second positioning surface 702 of the coil skeleton 7 are just snapped into the limiting space between the first stop block 812 and the second stop block 813 symmetrically distributed on the inner end surface of the sheath plate 801, the third stop block 814 in the middle of the coil sheath 8 is snapped into the notch 703 in the middle of the coil skeleton 7, and the two buckles 704 on the left and right of the coil skeleton 7 are snapped into the slots 815 on both sides of the coil sheath 8.

[0069] A further improvement to improve welding efficiency and reduce material consumption is to adjust the key welding position so that the connecting wire 11 can better fit the pin 12 of the coil assembly 101. The key improvement is to weld the pin 12 on the outside of the connecting wire 11. Fig.10 As shown, after the pin 12 is bent, from top to bottom are the pin 12, the welding end 1102 of the connecting wire 11 and the boss 804, and the connecting wire 11 is pressed under the pin 12, so as to prevent the connecting wire 11 from falling off after being pulled.

[0070] In addition, the conventional bending of the pin 12 is to Fig. 9 The pin 12 in the middle is pushed toward the boss 804 and bent once, and the lower tangent line of the bent pin 12 is tangent to the wire core of the welding end 1102 (such as Fig.17 As shown), this is often an ideal state. When the pin 12 is located outside the connecting line 11, the actual situation is often as follows Fig.18 As shown in FIG. 1 , after the pin 12 is bent, it rebounds due to the elastic force generated by the deformation, and the pin 12 is not tangent to the wire core and is suspended for a while. Fig.19 As shown: there is a gap between the lower tangent line of the plug pin 12 and the wire core of the welding end 1102. This gap needs more tin liquid to fill the gap for welding. The final result is that the amount of tin liquid increases, the cost rises, and the welding efficiency becomes lower. For this reason, the utility model stipulates that: the height of the end of the bent plug pin 12 is less than the height of the welding point between the plug pin 12 and the connecting wire 11. At this time, the bent part of the plug pin 12 is approximately in a downward curved arc, so that the plug pin 12 can wrap the welding end 1102 to a certain extent, and the plug pin 12 located in the middle must be closer to the welding end 1102.

[0071] The shape of the above-mentioned plug pin 12 can be formed by two bending steps, that is, the bending of the plug pin 12 includes a primary bending and a secondary bending. The primary bending bends the plug pin 12 from a straight state toward the direction of the connecting line 11, and the secondary bending presses the end of the plug pin 12 toward the surface of the sheath plate 801, so that the middle part of the plug pin 12 fits with the connecting line 11. The secondary bending is a new bending step added to the present invention. Since the bending directions of the primary bending and the secondary bending are different, a new bending driving force needs to be provided. The bending driving force that can be used in the present invention is a push pin 15 facing the end face of the sheath plate 801 and a driving member that drives the push pin 15 to move closer to or away from the sheath plate 801. The push pin 15 presses the end of the plug pin 12 during the secondary bending. The push pin 15 facing the end face of the sheath plate 801 means that the direction of the force exerted by the push pin 15 on the plug pin 12 is perpendicular to the end face of the sheath plate 801. The driving member can be a device that realizes linear drive, such as a cylinder or a linear motor. Fig. 20 , is a schematic diagram of the pin 12 after secondary bending. It can be clearly seen that the lower tangent line of the pin 12 after the secondary bending is lower than the upper tangent line of the wire core of the welding end 1102, and of course it is higher than the upper surface of the sheath plate 801.

[0072] like Fig.21 Show:

[0073] A coordinate system is constructed with the transverse upper tangent a1 of the core of the connecting wire 11 as the x-axis and the longitudinal tangent a2 of the core of the connecting wire 11 close to the boss 804 as the y-axis, and the intersection α of a1 and a2 is the origin of the natural coordinate system.

[0074] The ideal end point of the pin 12 after one bending is β1, and the lateral upper tangent point of the core of the connecting wire 11 is γ. The length from β1 to γ ​​is the ideal position of the pin 12 after one shaping. The ray from point α to point γ is the positive direction of the x-axis, and the positive direction of the y-axis points from point α to the top (i.e., the opposite direction of the pin 12 being pressed).

[0075] Point β2 is the theoretical position of the top of the wire core after the secondary shaping of the pin 12. The top point β2 of the pin 12 should be located in the third quadrant of the coordinate system, that is, in the -y direction of a1 in the horizontal direction and the -x direction of the longitudinal tangent a2. The coordinate position of β2 is (-x, -y). In actual situations, the position of point β2 can be in the -x direction of the tangent a2 or on the tangent a1. In this case, the coordinate position of β2 is (-x, 0).

[0076] Assumptions Fig.21 The line segment b1 in is the plane of the sheath plate 801, so β2 should be higher than the height of b1.

[0077] Regarding the position of the push pin 15 used for secondary bending, the push pin 15 should be located in the -x direction of the tangent a2, and the width P of the push pin 15 should be smaller than the absolute value of β1 to α. When the push pin 15 is driven by the driving member, it should move from the fourth quadrant of the coordinate system to the third quadrant, and the thrust of the push pin 15 is controlled by the driving member.

[0078] After the secondary shaping, the distance between the plug pin 12 and the core of the connecting wire 11 is further reduced, and the core can be wrapped downward to a certain extent, avoiding the hanging phenomenon that may occur after the primary bending.

[0079] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0080] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0081] In this specification, the schematic representation of the terms does not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in one or more embodiments.

[0082] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A coil sheath, characterized in that: It comprises a sheath plate (801), wherein one end surface of the sheath plate (801) has a wire groove (802) for guiding a connecting wire (11), and a wire outlet (803) of the wire groove (802) is provided with a boss (804) protruding from the end surface of the sheath plate (801) and a pin hole (805) penetrating the sheath plate (801); The boss (804) is used to lift the connecting wire (11), so that there is a space between the welding end (1102) of the connecting wire (11) and the sheath plate (801) for absorbing tin liquid.

2. The coil sheath according to claim 1, characterized in that: Two wire ducts (802) are symmetrically arranged, and the wire outlets (803) of the two wire ducts (802) extend in opposite directions.

3. The coil sheath according to claim 1, characterized in that: Each wire groove (802) is provided with a corresponding boss (804), and the wire groove (802), the boss (804) and the pin hole (805) are arranged along the direction in which the connecting wire (11) extends out of the wire outlet (803), and the length direction of the boss (804) is perpendicular to the direction in which the connecting wire (11) extends out of the wire outlet (803).

4. The coil sheath according to claim 1, characterized in that: Each wire groove (802) is provided with two bosses (804) in correspondence, and the wire groove (802) and the two bosses (804) are arranged along the direction in which the connecting wire (11) extends out of the wire outlet (803), the pin hole (805) is located between the two bosses (804), and the length direction of the two bosses (804) is perpendicular to the direction in which the connecting wire (11) extends out of the wire outlet (803).

5. The coil sheath according to claim 1, characterized in that: The upper surface of the boss (804) is provided with an arc-shaped notch (14) for accommodating the connecting wire (11).

6. The coil sheath according to claim 1, characterized in that: The upper surface of the boss (804) is a convex arc-shaped surface (13).

7. The coil sheath according to claim 1, characterized in that: A bending stopper (806) is provided between the boss (804) and the pin hole (805); the side of the bending stopper (806) facing away from the boss (804) is an arc-shaped surface surrounding the outer surface of the pin (12).

8. The coil sheath according to claim 1, characterized in that: The size of the boss (804) perpendicular to the extension direction of the connection line (11) is defined as the length C of the boss (804), and the length C of the boss (804) is greater than the opening size of the wire outlet (803).

9. The coil sheath according to claim 1, characterized in that: The height E of the boss (804) is less than or equal to half the height of the wall of the wire groove (802).

10. The coil sheath according to claim 5, characterized in that: The width F of the arc-shaped notch (14) is greater than or equal to the diameter of the welding end (1102).

11. A coil assembly, characterized in that: It comprises a coil frame (7), a plug pin (12), and a coil sheath (8) as claimed in any one of claims 1 to 10, wherein one end of the plug pin (12) is connected to the enameled wire of the coil frame (7), and the other end passes through the plug pin hole (805) of the coil sheath (8), and is bent and welded to the welding end (1102) of the connecting wire (11).

12. The coil assembly according to claim 11, characterized in that: The plug pin (12) is welded to the outside of the connecting wire (11).

13. The coil assembly according to claim 12, characterized in that: The height of the end of the bent plug pin (12) is less than the height of the welding point between the plug pin (12) and the connecting wire (11).

14. The coil assembly according to claim 11, characterized in that: The bending of the plug pin (12) includes a primary bending and a secondary bending, wherein the primary bending bends the plug pin (12) from a straight state toward the direction of the connecting line (11), and the secondary bending presses the end of the plug pin (12) toward the surface of the sheath plate (801) so that the middle of the plug pin (12) fits the connecting line (11).

15. A drainage motor, characterized in that: The coil assembly (101) comprises any one of claims 11 to 14.

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