Wire outlet structure suitable for stepping motor and stepping motor using same

Abstract

The utility model relates to the technical field of intelligent equipment, in particular to a wire outlet structure suitable for a stepping motor and the stepping motor using the wire outlet structure, and the wire outlet structure comprises a circuit board which is fixed at a wiring opening of the stepping motor; the binding post is used for fixing a wire outlet end of a coil of the stepping motor; the binding posts are suitable for being welded and fixed in pin holes in a circuit board; one end of the connecting wire is suitable for being welded and fixed in a wire hole in the circuit board; the wire outlet box is used for sealing the wiring opening of the stepping motor, and at least one wire passing hole suitable for a connecting wire to pass through is formed in the wire outlet box; wherein each wire passing hole is used for guiding and limiting at least one connecting wire, so that any connecting wire passing through the wire passing hole avoids any welding spot formed on the binding post. According to the utility model, the safety of the stepping motor in the using process can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of intelligent equipment, and in particular to an outlet wire structure suitable for a stepping motor and a stepping motor using the same. Background Art

[0002] Stepper motor is a widely used control motor, mainly used in various household appliances. The main function of stepper motor is to convert electrical energy into mechanical energy and transmit power to mechanisms and components. There are four-phase resistors in the motor, which needs to be connected to a four-phase power supply for driving. It has at least four leads, and they must be kept in the corresponding order to meet the steering requirements.

[0003] In order to facilitate the wiring of stepper motors, commonly used stepper motors include leaded motors and leadless motors. Among them, leaded motors can be divided into motors with a wiring structure with a circuit board and motors without a circuit board. For leaded stepper motors with a wiring structure with a circuit board, welding is required to make the coil and the circuit board, as well as the circuit board and the connecting wire conductive. In this case, actual research and use have found that the following problems exist:

[0004] Due to the limited internal space of the stepper motor, when welding the coil and the circuit board, and the circuit board and the connecting wire, it is easy for the soldering points inside the motor to rub against the insulation layer of the connecting wire. When the insulation layer is damaged, the conductor layer of the connecting wire will contact the soldering points, causing the motor to short-circuit, creating a safety hazard.

[0005] In view of the various problems existing in the output line structure of the above-mentioned stepper motor, it is necessary to further optimize and improve it. Utility Model Content

[0006] The first purpose of the utility model is to provide an outlet wire structure suitable for a stepping motor, so as to solve the technical problem of improving the safety of its use.

[0007] The second object of the utility model is to provide a stepping motor to solve the technical problem of optimizing the overall performance of its outlet structure.

[0008] The outlet structure of the utility model applicable to the stepping motor is realized as follows:

[0009] A wire output structure suitable for a stepping motor, comprising:

[0010] A circuit board is fixed at the wiring opening of the stepper motor;

[0011] A terminal block is used to fix the output terminal of the coil of the stepping motor; the terminal block is suitable for being welded and fixed in the pin hole on the circuit board;

[0012] A connecting wire, one end of which is suitable for being welded and fixed in a wire hole on the circuit board; and

[0013] The outlet box is used to cover the wiring opening of the stepper motor, and the outlet box is provided with at least one wire hole suitable for the connection wire to pass through; wherein

[0014] Each of the wire-passing holes is used to guide and limit at least one connecting wire, so that any connecting wire passing through the wire-passing hole avoids any welding point formed on the terminal.

[0015] In an optional implementation of the present invention, a first arc-shaped protrusion of the insulating layer for guiding the connecting wire is provided on the circumferential edge of the side end of each wire hole facing the outlet box.

[0016] In an optional implementation of the present invention, a second arc-shaped protrusion for avoiding the insulating layer of the connecting wire is provided on the circumferential edge of the side end of each of the pin holes facing the outlet box.

[0017] In an optional implementation of the present invention, each of the wire passing holes is a waist-shaped hole, and the long axis direction of the waist-shaped hole extends along the height direction of the stepping motor.

[0018] In an optional implementation of the utility model, more than two connecting wires are respectively passed through each of the wire holes; and

[0019] More than two connecting wires in each wire-passing hole are arranged along the long axis direction of the waist-shaped hole.

[0020] In an optional implementation of the utility model, when the outlet box covers the wiring opening of the stepper motor, any solder joint on the circuit board avoids the forward projection area of ​​each wire hole on the circuit board.

[0021] In an optional implementation of the present invention, at least one positioning column for abutting against the circuit board is protruded from the side end surface of the outlet box facing the circuit board.

[0022] In an optional implementation of the utility model, a positioning groove suitable for partially embedding the positioning column is provided on the side end surface of the circuit board facing the outlet box.

[0023] In an optional implementation of the utility model, the outlet box cover has a buckle for mating with the coil skeleton of the stepper motor; and

[0024] The circuit board is fixed on the coil frame.

[0025] The stepping motor of the utility model is realized as follows:

[0026] A stepper motor, comprising: the wire outlet structure applicable to the stepper motor, and a motor assembly with the wire outlet structure;

[0027] The motor assembly comprises a casing formed with the wiring opening and a coil frame arranged in the casing.

[0028] By adopting the above technical scheme, the utility model has the following beneficial effects: the outlet wire structure of the utility model is suitable for stepper motors and the stepper motors using the same, and the connection between the terminal and the circuit board is connected by welding, and the connection wire is welded to the circuit board, so as to realize the conduction between the connection wire and the coil on the terminal, and introduce electric energy into the coil of the stepper motor. In this process, the guide limit of the connection wire is realized by the wire hole on the outlet box, so that any connection wire passing through the wire hole can avoid any welding point formed on the terminal, thereby protecting the insulation layer of the connection wire, avoiding the problem of the insulation layer breaking due to the wear of the welding point on the insulation layer of the connection wire, and causing the inner core wire of the connection wire to contact the welding point to cause the motor short circuit, that is, to improve the safety of the motor use process, and it can be applied to the field of servo motor drive and control integrated system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the matching structure of the outlet structure and the housing of the stepping motor of the utility model;

[0030] Figure 2 It is a schematic diagram of the matching structure of the circuit board, the terminal and the connecting wire of the outlet structure of the stepping motor of the utility model;

[0031] Figure 3 This is a first-view structural diagram of an outlet box of the utility model applicable to an outlet structure of a stepping motor;

[0032] Figure 4 It is a second perspective structural schematic diagram of the outlet box of the utility model applicable to the outlet structure of the stepping motor;

[0033] Figure 5 It is a structural schematic diagram of the pin holes and wire holes on the circuit board of the outlet structure of the stepping motor of the utility model;

[0034] Figure 6 It is a structural schematic diagram of the welding points formed by the wiring posts and connecting wires of the outlet structure of the stepping motor and the circuit board respectively;

[0035] Figure 7 The utility model is a schematic diagram of the layout structure of multiple connecting wires of the output wire structure suitable for a stepping motor.

[0036] In the figure: housing 1, wiring opening 11, coil skeleton 2, connecting wire 3, inner core wire 31, insulating layer 32, circuit board 4, pin hole 41, wire hole 42, first arc-shaped protrusion 43, second arc-shaped protrusion 44, terminal 5, outlet box 6, wire hole 61, positioning column 62, buckle 63, welding point 7. DETAILED DESCRIPTION

[0037] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings.

[0038] Embodiment 1:

[0039] See also Figures 1 to 7 As shown, this embodiment provides an outlet structure suitable for a stepper motor, including: a circuit board 4 fixed at the wiring opening of the stepper motor, a terminal 5 for fixing the outlet end of the coil of the stepper motor, a connecting wire 3 connected to the terminal 5, and an outlet box 6 for covering the wiring opening of the stepper motor.

[0040] Specifically, first is circuit board 4:

[0041] From the perspective of the structure itself, the circuit board 4 can be directly fixed on the coil frame 2. As for the fixing method of the circuit board 4 and the coil frame 2 here, this embodiment does not make an absolute limitation, and it can be optionally adopted, for example, but not limited to, a direct clip-on method. That is, as long as the circuit board 4 can be reliably fixed in the housing 1 of the stepper motor so that it does not shake unexpectedly during the use of the stepper motor, the use requirements of this embodiment are met.

[0042] Functionally, it is responsible for the conduction connection between the terminal 5 and the connecting wire 3, so that the terminal 5 and the connecting wire 3 which are difficult to form a reliable connection by themselves can be connected to the circuit board 4 respectively to form a reliable conduction.

[0043] In order to achieve the above effects, this embodiment has the following designs:

[0044] First, the circuit board 4 is provided with a pin hole 41 for soldering and fixing the terminal 5. The terminal 5 can be inserted into the pin hole 41 and a solder joint 7 after tinning is formed between the terminal 5 and the pin hole 41. In combination with the actual situation, there is more than one pin hole 41, and the specific number is not absolutely limited in this embodiment. The drawings of this embodiment only take the case of six pin holes 41 as an example.

[0045] For the six pin holes 41 here, they can be arranged in three rows along the circumferential direction of the stepper motor on the circuit board 4, and each row can include two pin holes 41 arranged along the height direction of the stepper motor. At this time, for the three rows of pin holes 41, in an optional implementation, the three pin holes 41 located at the top along the height direction of the stepper motor are in a collinear distribution, and the three pin holes 41 located at the bottom are in a collinear distribution. Such a neat distribution method forms sufficient avoidance space for the connection between the connecting wire 3 and the circuit board 4.

[0046] Secondly, the circuit board 4 is provided with a wire hole 42 for welding and fixing the connecting wire 3. Specifically, one end of the connecting wire 3 is formed with a stripping head for welding with the circuit board 4, and the stripping head is to remove the insulating layer 32 to expose the inner core wire 31. Here, the inner core wire 31 can be inserted into the wire hole 42 and a tinned solder joint 7 is formed between the inner core wire 31 and the wire hole 42.

[0047] Based on the above structure, it should be noted that there are more than one wire holes 42 here, and the specific number is not absolutely limited in this embodiment. The drawings of this embodiment only take the case of five wire holes 42 as an example.

[0048] For the five wire holes 42 here, they can be arranged in three rows of five wire holes 42 along the circumferential direction of the stepper motor on the circuit board 4, wherein two rows of wire holes 42 respectively include two wire holes 42, and the other row of wire holes 42 is provided with only one wire hole 42. Here, the reasonable layout of the positions of the solder joints 7 on the circuit board 4 is still considered, and there is a row of wire holes 42 on the outside of the three rows of pin holes 41, and the two rows of wire holes 42 located on the outside of the pin holes 41 include a total of four wire holes 42. On this basis, at this time, for the wire holes 42, they can be staggered relative to the pin holes 41, so that as many pin holes 41 and wire holes 42 as possible can be arranged on the circuit board 4 with limited area, that is, for the demand for a fixed number of pin holes 41 and wire holes 42, the area of ​​the circuit board 4 required is reduced. Of course, the wire holes 42 here and the pin holes 41 at the corresponding positions of the three rows of pin holes 41 can also be arranged in a colinear manner, and this embodiment does not make an absolute limitation on this. In addition, a wire hole 42 is provided between two pin holes 41 in the middle row of pin holes 41 among the three rows of pin holes 41. This is also to improve the utilization rate of the area of ​​the circuit board 4 as much as possible.

[0049] On the basis of the above structure, the present embodiment is also designed as follows: a first arc-shaped protrusion 43 for guiding the insulating layer 32 of the connecting wire 3 is provided on the circumferential edge of the side end of each wire hole 42 facing the outlet box 6. A second arc-shaped protrusion 44 for avoiding the insulating layer 32 of the connecting wire 3 is provided on the circumferential edge of the side end of each pin hole 41 facing the outlet box 6. The design of the first arc-shaped protrusion 43 and the second arc-shaped protrusion 44 here enables the connecting wire 3 that has been welded to the circuit board 4 to be routed around the first arc-shaped protrusion 43 and the second arc-shaped protrusion 44 on the circuit board 4, that is, the first arc-shaped protrusion 43 and the second arc-shaped protrusion 44 here can prevent the insulating layer 32 of the connecting wire 3 from contacting the solder joint 7 formed by the terminal 5 and the inner core wire 31 of the connecting wire 3 and the circuit board 4 respectively.

[0050] Next, the terminal box 6 is explained. First, in an optional implementation, the terminal box 6 is covered with a buckle 63 for matching with the coil frame 2 of the stepper motor. The buckle 63 here can adopt any mature means in the prior art, and this embodiment does not make any improvement to this, so it is not specifically limited.

[0051] Furthermore, considering that the outlet structure of this embodiment adopts six wire holes 42 to match six connecting wires 3, this embodiment provides two wire holes 61 suitable for the connecting wires 3 to pass through on the outlet box 6; one of the wire holes 61 is adapted to two connecting wires 3, and the other wire hole 61 is adapted to three connecting wires 3.

[0052] On the basis of the above structure, an optional implementation method is given in combination with the attached drawings. In order to adapt to the layout of the pin holes 41 and the wire holes 42 on the circuit board 4, the two wire holes 61 used in this embodiment are waist-shaped holes, and the long axis direction of the waist-shaped holes extends along the height direction of the stepper motor. In this regard, the connecting wires 3 passing through each wire hole 61 are arranged along the long axis direction of the waist-shaped holes. The size of each wire hole 61 in the short axis direction is slightly larger than the wire diameter of a connecting wire 3, thereby reducing the shaking of the connecting wire 3 in the wire hole 61. As for the size of the long axis direction of the wire hole 61 here, it can be designed according to the sum of the wire diameters of three connecting wires 3 at most. In this way, by accurately controlling the aperture of the wire hole 61, foreign matter can be prevented from entering the motor. At the same time, the surface area of ​​the outlet box 6 except the wire hole 61 is increased, which is convenient for subsequent sealing operations.

[0053] In this regard, it is also necessary to explain that, for the connection wires 3 passing through each wire hole 61, any connection wire 3 can avoid any solder joint 7 formed on the terminal 5. Specifically, when the outlet box 6 covers the wiring opening of the stepper motor, any solder joint 7 on the circuit board 4 avoids the forward projection area of ​​each wire hole 61 on the circuit board 4.

[0054] In detail, with reference to the accompanying drawings, for the waist-shaped wire-passing hole 61, the inner hole edge limits the possible range of movement of the connecting wire 3 in the wire hole 42, and the boundary line of the forward projection area of ​​the wire hole 42 on the circuit board 4 is also defined by the inner hole edge. In detail, with reference to the accompanying drawings, the forward projection area of ​​each wire-passing hole 61 on the circuit board 4 is located one-to-one in the blank space formed by two rows of pin holes 41 without a wire hole 42 in the middle.

[0055] In this regard, that is to say, for the connecting wire 3 passing through the wire hole 42, although it can move within a small range in the wire hole 42, no matter how it moves, the maximum range of its movement is limited by the insulating layer 32 of the connecting wire 3 and the inner hole edge of the wire hole 42. That is to say, when the insulating layer 32 of the connecting wire 3 contacts the inner hole edge of the wire hole 42, the movement of the connecting wire 3 is forced to stop.

[0056] When the connecting wire 3 is soldered to the circuit board 4, the inner core wire 31 of the connecting wire 3 is fixed to the circuit board 4 by tin plating. The first arc-shaped protrusion 43 and the second arc-shaped protrusion 44 guide the connecting wire 3, and the wire hole 42 is guided and limited. The cooperation of multiple guiding components fixes the direction of the connecting wire 3, avoids the contact between the insulating layer 32 of the connecting wire 3 and the solder joint 7, avoids the wear of the insulating layer 32, and protects the internal circuit of the stepper motor.

[0057] In addition, it should be noted that, based on the reasonable layout of the six pin holes 41, the five wire holes 42 and the wire hole 61 on the outlet box 6, the five connecting wires 3 can also be fixed in order between the circuit board 4 and the outlet box 6, so that the five connecting wires 3 will not cross inside the outlet box 6, and have the same direction outside the outlet box 6, so that the welding order of the connecting wires 3 on the circuit board 4 can be effectively identified to avoid adverse abnormalities caused by incorrect wire sequence.

[0058] In addition, regarding the outlet box 6 of this embodiment, at least one positioning column 62 for contacting with the circuit board 4 is also protruded on the side end surface of the outlet box 6 facing the circuit board 4. In an optional embodiment, a positioning groove suitable for partially embedding the positioning column 62 can be provided on the side end surface of the circuit board 4 facing the outlet box 6. This embodiment takes the case of three positioning columns 62 at different positions as an example in conjunction with the accompanying drawings.

[0059] The design of the positioning column 62 here provides support for the side end surface of the outlet box 6 facing the circuit board 4, limits the degree of freedom in the direction perpendicular to the positioning column 62, strengthens the overall strength and reduces the possibility of motor damage caused by external force. In addition, the positioning column 62 can produce a certain pressure on the circuit board 4 when it abuts against the circuit board 4, thereby strengthening the positioning of the circuit board 4 and avoiding the problem of loosening of the circuit board 4 due to the force on the connecting wire 3.

[0060] In summary, for the output line structure suitable for the stepper motor of this embodiment, it plays a role in protecting the insulating layer 32 of the connecting wire 3, avoiding the problem of the insulating layer 32 being broken due to the wear of the welding point 7 on the insulating layer 32 of the connecting wire 3, which causes the inner core wire 31 of the connecting wire 3 to contact the welding point 7 and cause the motor short circuit, that is, improves the safety of the motor during use.

[0061] Embodiment 2:

[0062] See also Figures 1 to 7 As shown, based on the wire output structure applicable to the stepper motor of Example 1, the stepper motor provided in this embodiment includes: the wire output structure applicable to the stepper motor of Example 1, and a motor assembly matched with the wire output structure; the motor assembly includes a housing 1 formed with a wiring opening 11 and a coil frame 2 arranged in the housing 1.

[0063] The above specific embodiments further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0064] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional 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.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. A wire outlet structure suitable for a stepping motor, characterized in that: include: A circuit board is fixed at the wiring opening of the stepper motor; A terminal block is used to fix the output terminal of the coil of the stepping motor; the terminal block is suitable for being welded and fixed in the pin hole on the circuit board; A connecting wire, one end of which is suitable for being welded and fixed in a wire hole on the circuit board; as well as An outlet box, which is used to cover the wiring opening of the stepper motor, and the outlet box is provided with at least one wire hole suitable for the connection wire to pass through; in Each of the wire-passing holes is used to guide and limit at least one connecting wire, so that any connecting wire passing through the wire-passing hole avoids any welding point formed on the terminal.

2. The wire outlet structure suitable for a stepping motor according to claim 1, characterized in that: A first arc-shaped protrusion for guiding the insulating layer of the connecting wire is provided on the circumferential edge of the side end of each wire hole facing the outlet box.

3. The wire outlet structure suitable for a stepping motor according to claim 1, characterized in that: A second arc-shaped protrusion for avoiding the insulating layer of the connecting wire is provided on the circumferential edge of the side end of each pin hole facing the outlet box.

4. The wire outlet structure suitable for a stepping motor according to any one of claims 1 to 3, characterized in that: Each of the wire passing holes is a waist-shaped hole, and the long axis direction of the waist-shaped hole extends along the height direction of the stepping motor.

5. The wire outlet structure suitable for a stepping motor according to claim 4, characterized in that: Each of the wire holes has two or more connecting wires passing through it; and More than two connecting wires in each wire-passing hole are arranged along the long axis direction of the waist-shaped hole.

6. The wire outlet structure suitable for a stepping motor according to claim 4, characterized in that: When the outlet box covers the wiring opening of the stepping motor, any soldering point on the circuit board avoids the forward projection area of ​​each wire hole on the circuit board.

7. The wire outlet structure suitable for a stepping motor according to claim 1, characterized in that: At least one positioning column for abutting against the circuit board is protruded from the side end surface of the outlet box facing the circuit board.

8. The wire outlet structure suitable for a stepping motor according to claim 7, characterized in that: A positioning groove suitable for partially embedding the positioning column is provided on the side end surface of the circuit board facing the outlet box.

9. The wire outlet structure suitable for a stepping motor according to claim 1, characterized in that: A buckle on the outlet box cover for mating with the coil skeleton of the stepper motor; and The circuit board is fixed on the coil frame.

10. A stepping motor, characterized in that: include: The wire outlet structure applicable to a stepper motor as claimed in any one of claims 1 to 9, and a motor assembly with the wire outlet structure; The motor assembly comprises a casing formed with the wiring opening and a coil frame arranged in the casing.

Images