Brushless motor busbar assembly formed by integral injection molding

Abstract

The utility model relates to the technical field of brushless motors, in particular to an integrally injection-molded brushless motor busbar assembly, which comprises a supporting base, a limiting sleeve is fixedly connected onto the surface of the supporting base, a wiring terminal is arranged in the supporting base, a pin is fixedly connected onto the surface of the wiring terminal, and the pin is fixedly connected with the limiting sleeve. The pin is sleeved on the limiting sleeve, a protection mechanism is arranged on the surface of the limiting sleeve, the protection mechanism comprises a connecting block, and the connecting block is fixedly connected on the surface of the limiting sleeve. According to the brushless motor busbar assembly, manual installation is not needed between the supporting base and the wiring terminal, the trouble of poor welding caused by tilting or swinging of the wiring terminal due to manual installation is avoided, meanwhile, the position of the wiring terminal on the supporting base is guaranteed, the use effect of the brushless motor busbar assembly is improved, and the use experience of customers is not affected.

Description

Technical Field

[0001] The utility model relates to the technical field of brushless motors, in particular to an integrally injection-molded brushless motor busbar assembly. Background Art

[0002] The brushless motor busbar assembly is a key component used in brushless DC motors. It is responsible for connecting the motor windings to an external power supply or control system. The busbar assembly typically includes one or more busbar terminals, which are connected to the motor windings through welding or other means.

[0003] Existing brushless motors often use a plastic insulator as a support base. The terminals are first assembled into grooves in the base, and then the pins are welded to the stator windings. This structure makes manual installation of the terminals laborious due to the uneven thickness of the plastic wall. Furthermore, when welding the busbar terminal pins to the windings, the busbar terminals are prone to warping or wiggling, resulting in poor welding. Furthermore, the assembled busbar terminals suffer from poor positioning, hindering customer experience. Utility Model Content

[0004] The purpose of this utility model is to provide a one-piece injection-molded brushless motor busbar assembly to address the aforementioned background art issues, such as uneven plastic wall thickness in the support base, which makes manual installation of the wiring terminals laborious. Furthermore, when welding the busbar terminal pins to the windings, the busbar terminals are prone to warping or wiggling, resulting in poor welding. Furthermore, the assembled busbar terminals have poor positioning accuracy, which affects customer use.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: an integrally injection-molded brushless motor busbar assembly: comprising a supporting base, a limiting sleeve fixedly connected to the surface of the supporting base, a wiring terminal arranged inside the supporting base, a pin fixedly connected to the surface of the wiring terminal, the pin being sleeved on the limiting sleeve, a protective mechanism being arranged on the surface of the limiting sleeve, the protective mechanism comprising a connecting block, the connecting block being fixedly connected to the surface of the limiting sleeve, a card block being snap-connected on the surface of the limiting sleeve, a protective plate being fixedly connected to one end of the card block away from the connecting block, a nut being fixedly connected to the surface of the connecting block, and a limiting bolt being threadedly connected on the surface of the nut.

[0006] Preferably, the support base is in an integrated form, a cavity is provided inside the support base, and the wiring terminal is placed on the cavity inside the support base.

[0007] Preferably, the wiring terminal is three concentric layers, multiple groups of circular holes are opened on the surface of the support base, and the circular holes are evenly arranged in a circle. Circular holes are opened on the surface of the wiring terminal, and the circular holes are evenly arranged in a circle.

[0008] Preferably, the limiting sleeve limits the position of the terminal inside the support base through the pins, and the terminal and the circular hole correspond one to one with the circular hole of the support base. The support base requires a positioning guide column for assistance during injection molding.

[0009] Preferably, a card slot is provided on the surface of the connecting block, the card block is in an "L" shape, and the card block is engaged and connected to the card slot of the connecting block.

[0010] Preferably, a circular hole is opened on the surface of the clamping block, and the limiting bolt passes through the circular hole of the clamping block through a nut, and the limiting bolt limits the position of the clamping block on the connecting block.

[0011] Preferably, the clamping block is mounted on the connecting block via a protective plate, the protective plate is in the shape of a tube sheet, a groove is provided at the bottom of the protective plate, and the pin is located inside the groove of the protective plate.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. Change the arrangement of the wiring terminals to three concentric layers, place the wiring terminals on the grooves in the lower half of the support base, place the positioning guide pins on the surface of the support base, make the positioning guide pins pass through the circular holes of the wiring terminals, position the three groups of wiring terminals, and then perform integral injection molding on the upper half of the support base, so that the support base is integrated. This eliminates the need for manual installation between the support base and the wiring terminals, avoiding the trouble of poor welding caused by the wiring terminals tilting or swinging due to manual installation. At the same time, it ensures the position of the wiring terminals on the support base, improves the use effect of the brushless motor busbar assembly, and does not affect the customer experience.

[0014] 2. Engage the clamping block in the clamping slot of the connecting block, rotate the limiting bolt on the surface of the nut so that the limiting bolt passes through the circular hole at the bottom of the clamping block on the connecting block. The limiting bolt limits the clamping block to the surface of the connecting block. The connecting block supports the protective plate through the clamping block. The pins are in the groove at the bottom of the protective plate. The protective plate protects the pins, making it easy to transport the brushless motor busbar assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic frontal perspective view of the structure of the present invention;

[0016] Figure 2 This is a three-dimensional schematic diagram of the structure of the utility model, viewed from the back and looking up;

[0017] Figure 3 For this utility model Figure 2 Schematic diagram of the enlarged structure at A in the middle;

[0018] Figure 4 This is a partial front view, sectional, and exploded perspective diagram of the structure of the present invention;

[0019] Figure 5 It is a front view and sectional perspective diagram of the protective mechanism of the present utility model.

[0020] In the figure: 1. Support base; 2. Limit sleeve; 3. Terminal block; 4. Pin; 5. Connecting block; 6. Clamp block; 7. Protective plate; 8. Nut; 9. Limit bolt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-5 , an embodiment provided by the utility model:

[0023] A one-piece injection molded brushless motor busbar assembly: includes a support base 1, a limit sleeve 2 is fixedly connected to the surface of the support base 1, a wiring terminal 3 is provided inside the support base 1, a pin 4 is fixedly connected to the surface of the wiring terminal 3, the pin 4 is sleeved on the limit sleeve 2, a protective mechanism is provided on the surface of the limit sleeve 2, the protective mechanism includes a connecting block 5, the connecting block 5 is fixedly connected to the surface of the limit sleeve 2, a card block 6 is engaged and connected on the surface of the limit sleeve 2, and a protective plate 7 is fixedly connected to the end of the card block 6 away from the connecting block 5, and a protective plate 7 is fixedly connected on the surface of the connecting block 5. There is a nut 8, and a limit bolt 9 is threadedly connected on the surface of the nut 8. The brushless motor busbar assembly is installed in an integrated manner, which avoids the trouble of manually accessing the terminal 3. It also avoids the terminal 3 from tilting or swinging, resulting in poor welding, and ensures the position of the terminal 3 on the support base 1, thereby improving the use effect of the brushless motor busbar assembly. In addition, its protective mechanism can protect the pin 4 on the support base 1 through the protective plate 7, thereby avoiding damage to the pin 4 during transportation of the brushless motor busbar assembly, thereby improving the transportation safety of the brushless motor busbar assembly.

[0024] Furthermore, the support base 1 is integrated, and a cavity is provided inside the support base 1. The terminal blocks 3 are placed on the cavity inside the support base 1. The terminal blocks 3 are first placed on the support base 1, and then the support base 1 is injection molded on the terminal blocks 3, thereby realizing the integration of the support base 1. The bottom of the cavity of the support base 1 is a groove before injection molding, which makes it convenient to place the terminal blocks 3 on the groove of the support base 1, and inject the remaining part of the support base 1 on each terminal block 3 at the bottom of the support base 1, thereby realizing the integration of the support base 1.

[0025] Furthermore, the terminal block 3 is composed of three concentric layers, and a plurality of groups of circular holes are provided on the surface of the support base 1, and the circular holes are evenly arranged in a circular shape. The position of the terminal block 3 is limited by the positioning guide column, which facilitates the positioning injection molding of the support base 1 and ensures the relative position between the support base 1 and the terminal block 3.

[0026] Furthermore, the limit sleeve 2 limits the position of the terminal block 3 inside the support base 1 through the pin 4, thereby ensuring the position and angle of the terminal block 3 on the cavity of the support base 1, ensuring a one-to-one correspondence between the terminal block 3 and the circular hole and the circular hole of the support base 1, and ensuring the use effect of the brushless motor busbar assembly.

[0027] Furthermore, a card slot is opened on the surface of the connecting block 5, and the card block 6 is in an "L" shape. The card block 6 is engaged and connected to the card slot of the connecting block 5. The card slot of the connecting block 5 is rectangular, and the connecting block 5 supports the protective plate 7 through the card block 6.

[0028] Furthermore, a circular hole is opened on the surface of the clamping block 6, and a limiting bolt 9 passes through the circular hole of the clamping block 6 through a nut 8. The limiting bolt 9 limits the position of the clamping block 6 on the connecting block 5. The connecting block 5 and the clamping block 6 are each provided with three groups. The limiting bolt 9 limits the clamping block 6 to the clamping groove of the connecting block 5. The three groups of connecting blocks 5 support the protective plate 7 through the three groups of clamping blocks 6.

[0029] Furthermore, the clamping block 6 is installed on the connecting block 5 through the protective plate 7. The protective plate 7 is in the shape of a tube sheet. A groove is provided at the bottom of the protective plate 7. The pin 4 is located inside the groove of the protective plate 7. There is no contact between the protective plate 7 and the pin 4. The protective plate 7 prevents the pin 4 from being touched and damaged during the transportation of the brushless motor busbar assembly.

[0030] Working principle: The arrangement of the terminal blocks 3 is changed to three concentric layers, the terminal blocks 3 are placed on the grooves of the lower half of the support base 1, and the positioning guide pins are placed on the surface of the support base 1 so that the positioning guide pins pass through the circular holes of the terminal blocks 3. The three groups of terminal blocks 3 are positioned, and then the upper half of the support base 1 is integrally injection-molded so that the support base 1 is integrated. This eliminates the need for manual installation between the support base 1 and the terminal blocks 3, avoiding the trouble of poor welding caused by the terminal blocks 3 tilting or swinging due to manual installation. At the same time, it ensures the position of the terminal blocks 3 on the support base 1, thereby improving the use effect of the brushless motor busbar assembly.

[0031] Engage the clamping block 6 in the clamping slot of the connecting block 5, rotate the limiting bolt 9 on the surface of the nut 8, so that the limiting bolt 9 passes through the circular hole at the bottom of the clamping block 6 on the connecting block 5, and the limiting bolt 9 limits the clamping block 6 on the surface of the connecting block 5. The connecting block 5 supports the protective plate 7 through the clamping block 6, and the pin 4 is in the groove at the bottom of the protective plate 7. The protective plate 7 protects the pin 4, which facilitates the transportation of the brushless motor busbar assembly.

[0032] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. An integrally injection-molded brushless motor busbar assembly, characterized by: The invention comprises a support base (1), a limiting sleeve (2) is fixedly connected to the surface of the support base (1), a wiring terminal (3) is arranged inside the support base (1), a pin (4) is fixedly connected to the surface of the wiring terminal (3), the pin (4) is sleeved on the limiting sleeve (2), a protective mechanism is arranged on the surface of the limiting sleeve (2), the protective mechanism comprises a connecting block (5), the connecting block (5) is fixedly connected to the surface of the limiting sleeve (2), a clamping block (6) is clamped and connected on the surface of the limiting sleeve (2), a protective plate (7) is fixedly connected to the end of the clamping block (6) away from the connecting block (5), a nut (8) is fixedly connected to the surface of the connecting block (5), and a limiting bolt (9) is threadedly connected on the surface of the nut (8).

2. The integrally injection molded brushless motor busbar assembly according to claim 1, characterized in that: The support base (1) is in an integrated form, a cavity is provided inside the support base (1), and the connection terminal (3) is placed on the cavity inside the support base (1).

3. The integrally injection-molded brushless motor busbar assembly according to claim 1, characterized in that: The wiring terminal (3) is composed of three concentric layers. A plurality of groups of circular holes are provided on the surface of the support base (1), and the circular holes are evenly arranged in a circular shape. The wiring terminal (3) is provided with circular holes on its surface, and the circular holes are evenly arranged in a circular shape.

4. The integrally injection-molded brushless motor busbar assembly according to claim 3, characterized in that: The limiting sleeve (2) limits the position of the connection terminal (3) inside the support base (1) through the pin (4); the connection terminal (3) and the circular hole correspond one to one with the circular hole of the support base (1); and the support base (1) requires a positioning guide column for assistance during injection molding.

5. The integrally injection-molded brushless motor busbar assembly according to claim 4, characterized in that: A card slot is provided on the surface of the connecting block (5), and the card block (6) is in an "L" shape. The card block (6) is engaged and connected to the card slot of the connecting block (5).

6. The integrally injection molded brushless motor busbar assembly according to claim 1, characterized in that: A circular hole is provided on the surface of the clamping block (6), and the limiting bolt (9) passes through the circular hole of the clamping block (6) through a nut (8). The limiting bolt (9) limits the position of the clamping block (6) on the connecting block (5).

7. The integrally injection molded brushless motor busbar assembly according to claim 6, characterized in that: The clamping block (6) is mounted on the connecting block (5) via a protective plate (7); the protective plate (7) is in the shape of a tube sheet; a groove is provided at the bottom of the protective plate (7); and the pin (4) is located inside the groove of the protective plate (7).

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