Outlet box for subdivision integrated motor and stepping motor comprising same

Abstract

The utility model discloses an outlet box for a subdivision integrated motor and a stepping motor comprising the outlet box. The outlet box comprises a box body and a box cover covering the top of the box body. A mounting groove is formed in the top of the box body, a base plate is arranged in the mounting groove, the box body is provided with a plurality of insertion holes penetrating through the base plate, the circuit board is placed on the base plate, and a wiring area is defined by the base plate, the circuit board and the inner bottom surface of the mounting groove and located on the front side of the mounting groove. After the box cover and the box body are assembled, a lower wire outlet communicated with the wiring area is formed in the front of the wire outlet box, an upper wire outlet communicated with the installation groove is formed in the top of the wire outlet box, and the upper wire outlet, the installation groove and the lower wire outlet can form a heat dissipation channel and a foreign matter discharging channel. According to the utility model, the built-in installation of the traditional circuit board is improved into the external installation through the improvement of the structure of the outlet box, thereby facilitating the foreign matter treatment effect in the circuit board assembly process, improving the heat dissipation efficiency, and prolonging the service life.

Description

Technical Field

[0001] The utility model relates to the technical field of motor design with subdivision drive, in particular to an outlet box for a subdivision integrated motor and a stepping motor comprising the outlet box. Background Art

[0002] The subdivision of a stepper motor refers to decomposing a sine wave into multiple small pulses by adjusting different step angles, driving the motor step by step, reducing resonance and noise, and making its movement smoother. The subdivision of a stepper motor is divided into two types: internal drive and external drive. The subdivision structure of the external drive will increase the overall size of the motor and increase the number of connecting wires. The internal drive integrates the subdivision structure on the circuit board, which can reduce the number of external connecting wires, but will increase the thickness and heat generation of the circuit board to a certain extent.

[0003] In the traditional structure, the circuit board is installed inside the motor and located outside the terminal box. The terminal box is covered outside the circuit board. The terminal box is only used for wiring. Figure 1 As shown, the connection line 18 is arranged on the top of the outlet box 19, and the circuit board 20 is located below the outlet box 19. There are the following defects in assembling the circuit board 20 inside the motor: (1) It is prone to multiple failure modes, foreign matter, garbage, copper foil shedding and wire breakage. (2) The circuit board needs to be assembled in the production workshop together with the motor. There is no electrostatic protection, and it is easy to absorb debris during the assembly process. (3) The integrated circuit board assembled inside the motor has low heat dissipation efficiency and occupies a large space inside the motor.

[0004] In addition, the outlet box cover of the prior art is slid into the box body from the front, resulting in a long installation path and low installation efficiency.

[0005] Therefore, it is necessary to design an outlet box that can accommodate the circuit board and effectively protect the circuit board. Utility Model Content

[0006] In order to solve the technical problems that the stepper motor outlet box in the prior art can only be used for line arrangement, the circuit board can only be assembled inside the motor, and there are poor heat dissipation effects, multiple failure modes, and easy generation of foreign matter and garbage, the utility model provides an outlet box for subdividing integrated motors and a stepper motor containing the same to solve the above problems.

[0007] The utility model proposes an outlet box for subdividing an integrated motor, comprising a box body that can be clamped on the shell of a stepper motor and a box cover that covers the top of the box body; a mounting groove is provided on the top of the box body, a pad is provided in the mounting groove, the box body has a plurality of plug holes that penetrate the pad, a circuit board of the stepper motor is placed on the pad, the pad, the circuit board and the inner bottom surface of the mounting groove form a wiring area, and the wiring area is located on the front side of the mounting groove.

[0008] After the box cover is assembled with the box body, a lower wire outlet communicating with the wiring area is provided in front of the wire outlet box, and an upper wire outlet communicating with the installation groove is provided at the top of the wire outlet box. The upper wire outlet is located above the backing plate, and the upper wire outlet, the installation groove and the lower wire outlet can form a heat dissipation channel and a foreign object discharge channel.

[0009] Furthermore, the upper wire outlet is located at the rear end of the box cover.

[0010] Furthermore, the front end of the installation groove is open, and the front end of the box cover has a baffle for blocking the installation groove. The lower wire outlet is located at the lower part of the baffle.

[0011] Furthermore, convex ribs are provided on both left and right sides of the box cover, and sliding grooves for slidingly cooperating with the convex ribs are provided on both sides of the installation groove; a buckle is provided at the rear end of the box cover, and a bayonet for engaging with the buckle is provided on the box body behind the installation groove.

[0012] Furthermore, the buckles are symmetrically arranged on both sides of the upper wire outlet.

[0013] Furthermore, a slot for inserting the convex rib is provided on the top surface of the box body in the middle of the sliding groove. When the convex rib slides backward along the sliding groove by a certain distance, the buckle engages with the bayonet.

[0014] Furthermore, relief grooves are provided on both sides at the front end of the installation groove. The relief grooves are located at the front end of the sliding groove and are connected to the sliding groove to form an L-shaped structure. Stopping blocks connected to the baffle are provided on both left and right sides of the box cover. When the box body is buckled with the box cover, the stopping blocks are located in the relief grooves, so that the stopping blocks are in contact with the inner side surface of the installation groove.

[0015] Furthermore, the bayonet includes an insertion opening extending backward from the rear end surface of the installation groove and a buckling opening extending downward from the top surface of the box body. The insertion opening communicates with the buckling opening, and the buckle is stuck on the inner surface of the buckling opening through the insertion opening.

[0016] Furthermore, the lower surface of the lower wire outlet is at the same height as the inner bottom surface of the wiring area. Stopping platforms protruding from the inner bottom surface of the installation groove and in contact and cooperation with the lower surface of the baffle are provided at the front ends of the box body on both sides of the lower wire outlet.

[0017] The present utility model also proposes a stepping motor, which includes a circuit board and the wire outlet box for subdividing and integrating the motor as described above. The circuit board is installed in the installation groove of the box body.

[0018] The beneficial effects of the present utility model are as follows:

[0019] (1) Through the improvement of the wire outlet box structure, the present utility model improves the traditional built-in installation of the circuit board to an external installation, which helps to improve the foreign object handling effect and heat dissipation efficiency during the circuit board assembly process, and increases the service life.

[0020] (2) The utility model transfers the circuit board from inside the motor to the wire outlet box, and a circuit board installation space and a wiring area are simultaneously arranged in the wire outlet box. When a subdivision structure is integrated on the circuit board, the installation space inside the motor will not be affected by the increase in the thickness of the circuit board. Therefore, the wire outlet box described in the utility model has a wider scope of application.

[0021] (3) The utility model can install the circuit board and the wire outlet box in the electrostatic workshop after the internal structure of the motor is assembled. The installation environment is clean and hygienic, reducing the possibility of adsorbing foreign objects and garbage on the surface of the circuit board during the installation process. Description of the Drawings

[0022] The following further describes the present utility model in conjunction with the drawings and embodiments.

[0023] Figure 1 is a schematic diagram of the assembly relationship between the wire outlet box and the circuit board in the prior art;

[0024] Figure 2 is an assembly schematic diagram of the wire outlet box for a subdivided integrated motor described in the present utility model;

[0025] Figure 3 is a perspective view of the box body in the present utility model;

[0026] Figure 4 is a top view of the box body in the present utility model;

[0027] Figure 5 is a front view of the box body in the present utility model;

[0028] Figure 6 is a perspective view of the top of the box cover in the present utility model;

[0029] Figure 7 is a perspective view of the bottom of the box cover in the present utility model.

[0030] In the figure, 1, box body; 2, box cover; 3, installation groove; 4, backing plate; 5, insertion hole; 6, wiring area; 7, lower wire outlet; 8, upper wire outlet; 9, rib; 10, sliding groove; 11, buckle; 12, bayonet; 1201, buckling interface; 1202, insertion port; 13, baffle; 14, retaining platform; 15, relief groove; 16, retaining block; 17, slot; 18, connecting wire; 19, wire outlet box; 20, circuit board. Detailed Description of the Embodiment

[0031] The following details the embodiments of the present utility model. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation of the present utility model.

[0032] In this utility model, the term "front" indicating the orientation refers to the movement direction of the lid 2 when the lid 2 slides out of the box body 1, "rear" refers to the movement direction of the lid 2 when the lid 2 is inserted into the box body 1, "left" refers to the left side of the box body 1 when viewed from the front of the box body 1, "right" refers to the right side of the box body 1 when viewed from the front of the box body 1, "up" refers to the direction away from the stepping motor housing along the radial direction, and "down" refers to the direction close to the stepping motor housing along the radial direction.

[0033] Embodiment 1

[0034] As Figures 2 - 5 shown, an outlet box for a subdivided integrated motor includes a box body 1 that can be clamped on the housing of a stepping motor and a lid 2 covering the top of the box body 1, that is, the lid 2 is located above the box body 1; an installation groove 3 is provided at the top of the box body 1, a backing plate 4 is provided in the installation groove 3, the box body 1 has a plurality of insertion holes 5 penetrating the backing plate 4, and a circuit board with a subdivision circuit of the stepping motor is placed on the backing plate 4. The backing plate 4, the circuit board, and the inner bottom surface of the installation groove 3 enclose a wiring area 6, and the wiring area 6 is located at the front side of the installation groove 3.

[0035] When the lid 2 and the box body 1 are assembled, a lower outlet 7 communicating with the wiring area 6 is provided at the front of the outlet box, and an upper outlet 8 communicating with the installation groove 3 is provided at the top of the outlet box. The upper outlet 8 is located above the backing plate 4, and the upper outlet 8, the installation groove 3, and the lower outlet 7 can form a heat dissipation channel and a foreign object discharge channel.

[0036] The area of the backing plate 4 is smaller than the area of the installation groove 3. The backing plate 4 is used to lift the circuit board by a certain height, so as to leave a wiring area 6 for wiring in the area where the backing plate 4 is not provided below the circuit board. This not only meets the installation requirements of the circuit board but also meets the wiring requirements of the wires. Since the circuit board is transferred from the outside of the box body 1 to the inside of the box body 1, the box body 1 needs to be provided with insertion holes 5 for the terminals to pass through, so that the terminals can enter the installation groove 3 to be electrically connected to the circuit board. The backing plate 4 is integrally formed in the box body 1, the backing plate 4 protrudes from the inner bottom surface of the box body 1, and the insertion holes 5 are located on the box body 1 in the area where the backing plate 4 is located. Therefore, the insertion holes 5 penetrate the backing plate 4.

[0037] The outlet box of this utility model is provided with two outlet ports, and both of the two outlet ports can allow wires to pass through. Among them, the lower outlet 7 is closer to the wiring area 6 and can be used as the main outlet port. The wires arranged in the wiring area 6 can be directly led out from the lower outlet 7. At the same time, since the circuit board generates a large amount of heat and is a circuit board with a subdivision integrated circuit, the setting of the upper and lower two outlet ports can increase the air circulation, so that the installation groove 3 is in circular communication with the external air, thereby improving the heat dissipation efficiency.

[0038] During the assembly stage, the soldering of the external circuit board can be transferred to an anti-static workshop to avoid foreign object adsorption. After external foreign objects enter the installation groove 3 from the upper wire outlet 8, they can also be discharged from the lower wire outlet 7 together with the solder balls of the circuit board, effectively preventing foreign objects, solder balls, etc. from entering the motor interior and causing quality problems.

[0039] The upper wire outlet 8 is preferably located at the rear end of the box cover 2, so that the upper wire outlet 8 and the lower wire outlet 7 are distributed at the front and rear ends of the installation groove 3, which helps to dissipate heat comprehensively inside the installation groove 3.

[0040] The box cover 2 and the box body 1 usually adopt a plug-in structure, that is, they are buckled after being inserted. The specific structure is as follows: Figure 3 and Figure 6 As shown, the left and right sides of the box cover 2 have convex ribs 9, and both sides of the installation groove 3 have sliding grooves 10 that are slidably matched with the convex ribs 9; the rear end of the box cover 2 is provided with a buckle 11, and the box body 1 located behind the installation groove 3 has a bayonet 12 that is buckled with the buckle 11. During installation, first insert the convex ribs 9 of the box cover 2 into the sliding grooves 10, and then push the box cover 2 backward until the buckle 11 reaches the rear of the box body 1 and is buckled with the bayonet 12. The buckle 11 is preferably symmetrically arranged on both sides of the upper wire outlet 8 to ensure balanced force.

[0041] To facilitate the installation of the circuit board and the wiring harness, the front end of the installation groove 3 is open, the front end of the box cover 2 has a baffle 13 that blocks the installation groove 3, and the lower wire outlet 7 is located at the lower part of the baffle 13. When the box cover 2 is not installed, the open space at the front end of the installation groove 3 is relatively large, which is convenient for front-end wiring and soldering of the circuit board. The width and height of the lower wire outlet 7 are both smaller than the corresponding dimensions of the installation groove 3, and the baffle 13 is used to block the space in front of the installation groove 3 except for the lower wire outlet 7.

[0042] The lower wire outlet 7 can be only located on the baffle 13 of the box cover 2, or can be located on both the box cover 2 and the box body 1 at the same time. As shown, to facilitate the wire to extend from the lower wire outlet 7, the lower surface of the lower wire outlet 7 is at the same height as the inner bottom surface of the wiring area 6. The front ends of the box body 1 on both sides of the lower wire outlet 7 have a retaining platform 14 that protrudes from the inner bottom surface of the installation groove 3 and is in contact and cooperation with the lower surface of the baffle 13. The design of the retaining platform 14 can block the wire, so that the wire only extends from the lower wire outlet 7. Figures 3 - 5 As shown, to facilitate the wire to extend from the lower wire outlet 7, the lower surface of the lower wire outlet 7 is at the same height as the inner bottom surface of the wiring area 6. The front ends of the box body 1 on both sides of the lower wire outlet 7 have a retaining platform 14 that protrudes from the inner bottom surface of the installation groove 3 and is in contact and cooperation with the lower surface of the baffle 13. The design of the retaining platform 14 can block the wire, so that the wire only extends from the lower wire outlet 7.

[0043] The bayonet 12 includes an insertion port 1202 extending backward from the rear end surface of the installation groove 3 and a buckling port 1201 extending downward from the top surface of the box body 1. The insertion port 1202 is communicated with the buckling port 1201, and the buckle 11 is stuck on the inner surface of the buckling port 1201 through the insertion port 1202. As shown in 3- Figure 5As shown, the insertion port 1202 and the buckling interface 1201 are a horizontal hole and a vertical hole respectively. The two intersect inside the box body 1. The buckling part of the buckle 11 faces upward. When the buckle 11 is inserted into the insertion port 1202 and reaches the buckling interface 1201, the buckling part of the buckle 11 enters the buckling interface 1201 and abuts against the inner surface of the buckling interface 1201. At this time, the rear end face of the box cover 2 abuts against and is limited by the rear end face of the box body 1 inside the installation groove 3. Preferably, a chamfer is provided on the side of the buckle 11 that cooperates with the buckling interface 1201, which is convenient for pushing the buckle 11 into the insertion port 1202 and makes it more labor-saving during insertion. The bayonet 12 design of the present utility model can hide the buckle 11 inside the bayonet 12. After the wire outlet box is assembled, the surface has no sharp parts and is relatively smooth. And there is no need to open a groove inside, only straight holes need to be processed, and the processing technology is simple.

[0044] Since the box cover 2 needs to be inserted from the front of the box body 1, when the box cover 2 moves backward, a vacant position appears in front of the chute 10. If it is not blocked, foreign matters will accumulate in the chute 10 or even enter the installation groove 3. Therefore, as a preference, as Figure 3 、 Figure 6 and Figure 7 shown, both sides of the front end of the installation groove 3 have a relief groove 15. The relief groove 15 is located at the front end of the chute 10 and is connected to the chute 10 to form an L-shaped structure. Both sides of the box cover 2 have a block 16 connected to the baffle 13. When the box body 1 and the box cover 2 are buckled, the block 16 is located in the relief groove 15, so that the block 16 contacts the inner side surface of the installation groove 3. The block 16 can not only block the front end of the chute 10, but also play a role in limiting the sliding of the box cover 2.

[0045] Embodiment 2

[0046] On the basis of Embodiment 1, as Figure 3 and Figure 6 shown, the top surface of the box body 1 in the middle of the chute 10 has a slot 17 for the convex rib 9 to insert. When the convex rib 9 slides backward along the chute 10 for a certain distance, the buckle 11 is buckled with the bayonet 12. The setting of the slot 17 enables the convex rib 9 to be directly inserted backward from the middle of the chute 10, without the need to move from the front end of the chute 10 to the rear end of the chute 10. The sliding distance is small, which improves the assembly efficiency, and can also avoid friction between the box cover 2 and the circuit board during the assembly process.

[0047] Embodiment 3

[0048] A stepping motor includes a circuit board and the wire outlet box for subdividing and integrating the motor as described above. The circuit board is installed in the installation groove 3 of the box body 1.

[0049] The stepper motor of the present utility model improves the built-in installation of the circuit board to an external installation, which can transfer the soldering work of the circuit board to an anti-static workshop, ensuring safety and reliability. The solder beads and foreign matters generated during the soldering process can easily be discharged from the lower wire outlet 7 and will not enter the motor interior to cause poor motor quality.

[0050] The stepper motor of the present utility model can be applied to the field of servo motor drive and control integration systems.

[0051] In this specification, the schematic description of the terms does not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments.

[0052] Based on the ideal embodiments of the present utility model as described above, through the above description, relevant staff can, without departing from the technical idea of this utility model, make various changes and modifications. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. An outlet box for a subdivided integrated motor, characterized in that: It comprises a box body (1) that can be clamped on the housing of a stepping motor and a box cover (2) that covers the top of the box body (1); The top of the box body (1) is provided with a mounting groove (3), a pad (4) is provided in the mounting groove (3), the box body (1) has a plurality of plug holes (5) penetrating the pad (4), the circuit board of the stepping motor is placed on the pad (4), the pad (4), the circuit board and the inner bottom surface of the mounting groove (3) form a wiring area (6), and the wiring area (6) is located at the front side of the mounting groove (3); When the box cover (2) is assembled with the box body (1), the front of the outlet box is provided with a lower outlet (7) connected to the wiring area (6), and the top of the outlet box is provided with an upper outlet (8) connected to the mounting groove (3), the upper outlet (8) being located above the pad (4), and the upper outlet (8), the mounting groove (3) and the lower outlet (7) can form a heat dissipation channel and a foreign matter removal channel.

2. The terminal box for subdividing an integrated motor according to claim 1, characterized in that: The upper wire outlet (8) is located at the rear end of the box cover (2).

3. The terminal box for subdividing an integrated motor according to claim 1, characterized in that: The front end of the installation groove (3) is open, the front end of the box cover (2) is provided with a baffle (13) for shielding the installation groove (3), and the lower wire outlet (7) is located at the lower part of the baffle (13).

4. The terminal box for subdividing an integrated motor according to claim 3, characterized in that: The box cover (2) has convex ribs (9) on the left and right sides, and the two sides of the installation groove (3) have sliding grooves (10) that slidably cooperate with the convex ribs (9); a buckle (11) is provided at the rear end of the box cover (2), and a buckle opening (12) that buckles with the buckle (11) is provided on the box body (1) behind the installation groove (3).

5. The terminal box for subdividing an integrated motor according to claim 4, characterized in that: The buckles (11) are symmetrically arranged on both sides of the upper wire outlet (8).

6. The terminal box for subdividing an integrated motor according to claim 4, characterized in that: The top surface of the box body (1) located in the middle of the slide groove (10) has a slot (17) for the convex rib (9) to be inserted into. When the convex rib (9) slides backward along the slide groove (10) for a certain distance, the buckle (11) is buckled with the bayonet (12).

7. The terminal box for subdividing an integrated motor according to claim 3, characterized in that: The front ends of the installation groove (3) are provided with clearance grooves (15), the clearance grooves (15) are located at the front ends of the slide grooves (10) and are connected with the slide grooves (10) to form an L-shaped structure, and the left and right sides of the box cover (2) are provided with stoppers (16) connected with the baffle plate (13), and when the box body (1) and the box cover (2) are buckled, the stoppers (16) are located in the clearance grooves (15), so that the stoppers (16) are in contact with the inner side surfaces of the installation grooves (3).

8. The terminal box for subdividing an integrated motor according to claim 6, characterized in that: The snap-on socket (12) comprises an insertion opening (1202) extending backward from the rear end surface of the mounting groove (3) and a buckle interface (1201) extending downward from the top surface of the box body (1); the insertion opening (1202) is connected to the buckle interface (1201); the buckle (11) is clamped on the inner surface of the buckle interface (1201) through the insertion opening (1202).

9. The terminal box for subdividing an integrated motor according to claim 3, characterized in that: The lower surface of the lower wire outlet (7) is at the same height as the inner bottom surface of the wiring area (6), and the front ends of the box body (1) located on both sides of the lower wire outlet (7) have baffles (14) that protrude from the inner bottom surface of the mounting groove (3) and contact and cooperate with the lower surface of the baffle (13).

10. A stepping motor, characterized in that: It comprises a circuit board and an outlet box for subdividing an integrated motor as claimed in any one of claims 1 to 9, wherein the circuit board is installed in a mounting groove (3) of a box body (1).

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