Welding structure of connecting wire and contact pin and drainage motor comprising same

Abstract

The welding structure comprises a coil sheath, a push pin, a connecting wire and a pin, the connecting wire and the pin are assembled on the coil sheath, the pin penetrates through the coil sheath and then is welded to the outer side of the welding end of the connecting wire, the tail end of the pin is bent towards the surface of the coil sheath, and the push pin is welded to the outer side of the welding end of the connecting wire. And the lowest point of the tail end of the pin is lower than the contact position of the pin and the welding end. The contact pin is arranged on the outer side of the connecting wire, the tail end of the contact pin is pressed towards the surface of the coil sheath, and the lowest point of the tail end of the contact pin is lower than the contact position of the contact pin and the welding end, so that the contact pin can be attached to the welding end of the connecting wire, the welding efficiency is improved, and the use amount of tin liquid is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of motor design, in particular to a welding structure of a connecting wire and a plug pin and a drainage motor comprising the same. Background Art

[0002] The drainage motor is a key control component of the washing machine drainage system. 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. With labor costs and raw material prices becoming increasingly expensive today, 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 the existing drainage motor in that the external connection wires fall off and the automatic welding is inconvenient, the utility model provides a welding structure of a connection wire and a pin and a drainage motor including the welding structure to solve the above problems.

[0005] The utility model provides a coil sheath, comprising a coil sheath, a push pin, and a connecting wire and a plug pin assembled on the coil sheath. The plug pin passes through the coil sheath and is welded to the outside of the welding end of the connecting wire. The end of the plug pin is bent toward the surface of the coil sheath so that the lowest point of the end of the plug pin is lower than the contact position between the plug pin and the welding end.

[0006] Furthermore, the pin is bent in an arc shape and wrapped around the outside of the welding end.

[0007] Furthermore, the pin is bent to form a bent section after passing through the coil sheath, and the bent section is welded and fixed to the welding end.

[0008] Furthermore, the bending of the pin includes primary bending and secondary bending. The primary bending bends the pin from a straight state to the direction of the connecting line to produce a bending section, and the secondary bending presses the end of the bending section to the surface of the sheath plate so that the middle of the bending section fits with the connecting line.

[0009] Furthermore, after one bending, the pin is bent 90° from a straight state to a connection line direction.

[0010] Furthermore, the coil sheath comprises a sheath plate, one end surface of which has a wire groove for guiding the connecting wire, and a boss protruding from the end surface of the sheath plate and a pin hole penetrating the sheath plate are provided at the wire outlet of the wire groove.

[0011] Furthermore, two wire ducts are symmetrically arranged, and the wire outlets of the two wire ducts extend in opposite directions.

[0012] Furthermore, a bending stopper is provided on one side of the pin hole facing the bending direction of the pin, and the side of the bending stopper facing the pin hole is an arc-shaped surface that imitates the outer surface of the pin.

[0013] Furthermore, the end of the pin does not contact the surface of the coil sheath.

[0014] The utility model also provides a drainage motor, comprising the welding structure of the connecting wire and the plug pin mentioned above.

[0015] The beneficial effects of the utility model are:

[0016] (1) The utility model arranges the plug pin on the outside of the connecting wire and presses the end of the plug pin against the surface of the coil sheath. The lowest point of the end of the plug pin is lower than the contact position between the plug pin and the welding end. In this way, the plug pin can fit the welding end of the connecting wire, thereby improving the welding efficiency and reducing the amount of tin liquid used.

[0017] (2) The utility model adopts a secondary bending method to achieve an ideal bending effect for the pin, which is conducive to automated operation and improves welding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is an exploded view of a specific implementation of the drainage motor described in the utility model;

[0020] Figure 2 It is a three-dimensional diagram of the coil assembly of the utility model;

[0021] Figure 3 yes Figure 2 An exploded view of the coil assembly shown;

[0022] Figure 4 This is a schematic diagram of the ideal state of the pin after one bending in the utility model;

[0023] Figure 5 This is a diagram of the actual state of the pin after one bending in the utility model;

[0024] Figure 6 This is a simplified diagram of the actual state of the pin after one bending;

[0025] Figure 7 This is the state diagram of the pin after secondary bending;

[0026] Figure 8 This is a schematic diagram to explain the principle of secondary bending of the pin by pushing the pin;

[0027] Fig. 9 It is a schematic diagram of the structure of the coil sheath in the utility model;

[0028] Fig.10 It is a top view of the coil sheath in the utility model;

[0029] Fig.11 It is a schematic diagram of the inner end surface of the coil sheath of the utility model;

[0030] Fig.12 It is a three-dimensional diagram of the coil skeleton in the utility model;

[0031] Fig.13 It is a schematic diagram of the pre-assembly of the coil sheath and the coil frame in the utility model;

[0032] Fig.14 is a schematic diagram of the connection line;

[0033] Fig.15 This is a schematic diagram of the connection wires and pins after assembly.

[0034] 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 frame, 701, first positioning surface, 702, second positioning surface, 703, notch, 704, buckle, 8, coil sheath, 801, sheath plate, 802, wire groove, 803, outlet, 805, pin hole, 8 06, bending stopper, 807, horizontal wall, 808, bending 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, 15, push pin. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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 wire, and the lead end of the enameled wire is welded and fixed to the connecting wire 11 on the coil sheath 8 through a pin 12.

[0038] The utility model mainly improves the welding structure of the pin 12 and the connecting wire 11 in the drainage motor, aiming to improve the welding efficiency and reduce the material consumption. The first step of the improvement is to adjust the key position of the welding so that the connecting wire 11 can better fit the pin 12 of the coil assembly 101, thereby reducing the accumulation of tin liquid between the pin 12 and the connecting wire 11.

[0039] The conventional method of bending the plug pin 12 is to push the plug pin 12 in the figure toward the welding end 1102, so that the plug pin 12 is bent by 90 degrees, and the lower tangent line of the bent plug pin 12 is tangent to the wire core of the welding end 1102 (such as the simplified example). Figure 4 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 Figure 5 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. Figure 6: There is a gap between the lower tangent line of the pin 12 and the wire core of the welding end 1102. This gap requires 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.

[0040] In order to solve this technical problem, the utility model bends the pin 12 outside the connecting wire 11, that is, the welding end 1102 of the connecting wire 11 is located between the pin 12 and the coil sheath 8. Figure 7 As shown, after the pin 12 is bent, the connecting wire 11 is pressed under the pin 12, so that the connecting wire 11 can be prevented from falling off after being pulled. In addition, the end of the pin 12 is bent toward the surface of the coil sheath 8, so that the lowest point of the end of the pin 12 is lower than the contact position between the pin 12 and the welding end 1102, so that the pin 12 is more closely attached to the welding point of the welding end 1102.

[0041] Since the end of the plug pin 12 is bent and deformed toward the surface of the coil sheath 8, the welding end 1102 is covered under the plug pin 12 to a certain extent, so that the plug pin 12 is closer to the welding end 1102, and the welding point of the two is closer. The phenomenon of the plug pin 12 not being tangent to the wire core and hanging in the air is eliminated. In the preferred state, the plug pin 12 is bent in an arc shape and covered on the outside of the welding end 1102.

[0042] Combined with the bending technology of the traditional plug pin 12, the plug pin 12 of the utility model can be formed by two bendings. During the first bending, the plug pin 12 is bent from a straight state to the direction of the connecting line 11 to form a bending section. The bending angle is preferably 90°. This step is the same as the bending step of the traditional plug pin 12. Then, the plug pin 12 is bent for the second time. Figure 7 , which is a schematic diagram of the pin 12 after the 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 higher than the upper surface of the coil sheath 8. Compared with the primary bending, the distance between the pin 12 and the wire core of the connecting wire 11 is further reduced after the secondary shaping, and the wire core can be wrapped downward to a certain extent, avoiding the hanging phenomenon that may occur after the primary bending, reducing the amount of tin during welding, not only meeting the needs of automated wire welding, but also improving the wire welding quality in terms of structure during manual wire welding.

[0043] A push pin 15 can be added to the traditional bending tooling. The push pin 15 is responsible for pressing the bending section of the pin 12 downward during the second bending. The push pin 15 is preferably driven to reciprocate by a cylinder. The movement direction of the push pin 15 is perpendicular to the surface of the coil sheath 8. The cylinder is a standard part and has a small size and occupies a small area.

[0044] like Figure 8 The following is a detailed data diagram of the bending position of pin 12:

[0045] A coordinate system is constructed with the horizontal 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 on the side facing away from the plug pin 12 as the y-axis, and the intersection α of a1 and a2 is the origin of the natural coordinate system. The horizontal direction is parallel to the surface of the coil sheath 8, and the longitudinal direction is perpendicular to the surface of the coil sheath 8. The horizontal upper tangent point of the core of the connecting wire 11 is point γ, and the ray from point α to point γ is the positive direction of the x-axis. The positive direction of the y-axis is opposite to the direction in which the plug pin 12 is pressed by the push pin 15. The push pin 15 is located in the fourth quadrant of the natural coordinate system at the initial position; when the push pin 15 presses the plug pin 12, the push pin 15 moves from the fourth quadrant to the third quadrant.

[0046] The ideal end point of the pin 12 after the first bend is β1, and point β2 is the theoretical position of the top of the wire core after the second 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 the horizontal tangent a1 and the -x direction of the longitudinal tangent a2, and the coordinate position of β2 is (-x, -y). In actual situations, the position of point β2 can be in the -x direction of the longitudinal tangent a2, or on the horizontal tangent a1. In this case, the coordinate position of β2 is (-x, 0).

[0047] Assumptions Figure 8 The line segment b1 in is the surface of the coil sheath 8, so β2 should be higher than the height of b1.

[0048] like Fig. 9 The figure shows the structure of the coil sheath 8 described in the present invention. 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 a pin hole 805 that penetrates the sheath plate 801 is provided at the wire outlet 803 of the wire groove 802.

[0049] like Fig.10 As shown, the coil sheath 8 in the present invention is symmetrically provided with two wire grooves 802, and the welding end 1102 of the connecting wire 11 extends out from the wire outlet 803 of the wire groove 802. The wire outlets 803 of the two wire grooves 802 extend in opposite directions to avoid interference between the welding ends 1102 of the two connecting wires 11. 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.

[0050] In a further optimized design of the coil sheath 8, a bending stopper 806 (such as Fig.10As shown in FIG. 1 ), the side of the bending block 806 facing the pin hole 805 is an arc-shaped surface that conforms to the shape of the pin 12. The bending block 806 can effectively control the bending angle and direction of the pin 12, making the bent pin 12 more suitable for automation.

[0051] The wire groove 802 is preferably configured as an L-shape. Fig.10 As shown, two symmetrically arranged wire troughs 802 are surrounded by 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, together with the horizontal wall 807 and the partition wall 809, form a horizontal first channel 810 and a vertical second channel 811.

[0052] Online process:

[0053] like Fig.10 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 surface of the sheath plate 801. The separation surface 1103 between the welding wire end and the insulating layer 1101 abuts 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.

[0054] Assembly of coil sheath 8 and coil frame 7:

[0055] like Figure 11-13 As 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.

[0056] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "inside", "outside", etc. indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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.

[0057] 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.

[0058] 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.

[0059] 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 welding structure of a connecting wire and a pin, characterized in that: It comprises a coil sheath (8) and a connecting wire (11) and a plug pin (12) mounted on the coil sheath (8); the plug pin (12) passes through the coil sheath (8) and is welded to the outside of a welding end (1102) of the connecting wire (11); the end of the plug pin (12) is bent toward the surface of the coil sheath (8) so that the lowest point of the end of the plug pin (12) is lower than the contact position between the plug pin (12) and the welding end (1102).

2. The welding structure of the connecting wire and the plug pin according to claim 1, characterized in that: The insertion pin (12) is bent in an arc shape and covers the outside of the welding end (1102).

3. The welding structure of the connecting wire and the plug pin according to claim 1, characterized in that: The insertion pin is bent after passing through the coil sheath (8) to form a bent section, and the bent section is fixed to the welding end (1102) by welding.

4. The welding structure of the connecting wire and the plug pin according to claim 3, 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 in the direction of the connecting line (11) to produce a bent section, and the secondary bending presses the end of the bent section against the surface of the sheath plate (801) so that the middle of the bent section fits the connecting line (11).

5. The welding structure of the connecting wire and the plug pin according to claim 3, characterized in that: After the first bending, the pin (12) is bent 90° from a straight state toward the direction of the connection line (11).

6. The welding structure of the connecting wire and the plug pin according to claim 1, characterized in that: The coil sheath (8) comprises a sheath plate (801), one end surface of which is provided with a wire groove (802) for guiding a connecting wire (11), and a pin hole (805) penetrating the sheath plate (801) is provided at a wire outlet (803) of the wire groove (802).

7. The welding structure of the connecting wire and the plug pin according to claim 6, 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.

8. The welding structure of the connecting wire and the plug pin according to claim 6, characterized in that: A bending stopper (806) is provided on one side of the pin hole (805) facing the bending direction of the pin (12); the side of the bending stopper (806) facing the pin hole (805) is an arc-shaped surface that imitates the outer surface of the pin (12).

9. The welding structure of the connecting wire and the plug pin according to claim 1, characterized in that: The end of the insertion pin (12) does not contact the surface of the coil sheath (8).

10. A drainage motor, characterized in that: A welding structure comprising a connecting wire and a pin as described in any one of claims 1 to 9.

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