Direct-current brushless integrated switch with high sealing performance

Abstract

The utility model relates to the technical field of electric tool switches, and specifically discloses a DC brushless integrated switch with high sealing performance. The utility model relates to a power module, which comprises a shell, and an actuating mechanism, a reversing mechanism, a speed regulation module and a power module which are arranged in the shell, and is characterized in that the actuating mechanism comprises a trigger and a movable frame, the movable frame is sleeved with a sealing sleeve, the head part of the sealing sleeve is fixed between the trigger and the movable frame, the tail part of the sealing sleeve is fixed in the shell, and the tail part of the sealing sleeve is fixed in the shell. A glue filling opening is formed in the side wall of the shell and used for filling sealant between the shell and the sealing sleeve to form a glue filling body. According to the direct-current brushless integrated switch, the side wall of the shell is specially provided with the glue filling opening, and the glue filling body further seals a tiny gap between the shell and the sealing sleeve assembled in the shell, so that the sealing protection performance of the direct-current brushless integrated switch is improved, the operation space of glue filling of the side wall is larger, and glue filling operation of workers is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of electric tool switches, and specifically discloses a direct current brushless integrated switch with high sealing performance. Background Art

[0002] The brushless DC integrated switch is an electronic switching device used to control DC current. It integrates the brushless motor drive circuit and the switch function, and can achieve precise control and fast switching of current.

[0003] In order to improve the protection performance of the switch, some DC brushless integrated switches are designed with seals, such as a brushless integrated switch disclosed in CN214956581U, which discloses a through hole on the base, through which the moving contact frame passes, a sealing ring is fixed in the through hole, and the moving contact frame passes through the sealing ring. By arranging a sealing ring between the moving contact frame and the base, the sealing between the moving contact frame and the base is improved.

[0004] However, the current protection performance of this type of switch is not ideal. In some special occasions with very high protection performance, such as the IP67 protection safety level, similar products on the market are difficult to achieve. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provide a direct current brushless integrated switch with high sealing performance.

[0006] The utility model discloses a DC brushless integrated switch with high sealing performance, which adopts the following technical scheme:

[0007] A DC brushless integrated switch with high sealing performance comprises a shell and an actuating mechanism, a reversing mechanism, a speed regulating module and a power module arranged in the shell. The actuating mechanism comprises a trigger and a movable frame. A sealing sleeve is sleeved on the movable frame. The head of the sealing sleeve is fixed between the trigger and the movable frame. The tail of the sealing sleeve is fixed in the shell. A glue filling port is opened on the side wall of the shell. The glue filling port is used to fill sealant between the shell and the sealing sleeve to form a glue filling body.

[0008] Preferably, an annular step is provided in the shell, and the annular step separates the shell into an upper annular cavity and a lower annular cavity. The colloid filling body is formed in the upper annular cavity, and the tail of the sealing sleeve is embedded and fixed in the lower annular cavity.

[0009] Preferably, the shell has a port, the upper end of the movable frame sleeved with the sealing sleeve extends from the port and is connected to the trigger, and an angle is formed between the opening direction of the glue filling port and the opening direction of the port.

[0010] Preferably, the shell includes a cover shell, a heat dissipation shell and a base, the heat dissipation shell is provided with a closed portion and an open portion, the base is fastened and fixed inside by the cover shell and the closed portion of the heat dissipation shell to form a closed area; the speed regulation module includes a signal PCB board, the power module includes a power PCB board electrically connected to the signal PCB board, the signal PCB board is arranged in the cover shell and located in the closed area, and the power PCB board is arranged in the heat dissipation shell and located between the base and the heat dissipation shell.

[0011] Preferably, the movable frame is arranged between the base and the cover shell, and the glue injection port is arranged on the side wall of the cover shell.

[0012] Preferably, a first sealing member is provided between the base and the cover shell, and a second sealing member is provided between the base and the power PCB board.

[0013] Preferably, the first sealing member is fixed by hanging the base and the cover shell; the second sealing member is fixed by hanging the heat dissipation shell and the cover shell.

[0014] Preferably, a front sealing groove is provided on a side of the base facing the cover shell, and the first sealing member is arranged in the front sealing groove; a back sealing groove is provided on a side of the base facing the power PCB board, and the second sealing member is arranged in the back sealing groove.

[0015] Preferably, the reversing mechanism comprises a pendulum button and a reversing spring, wherein the reversing spring is arranged on the pendulum button and contacts or disconnects with the copper foil on the power PCB board as the pendulum button rotates, thereby realizing the reversing function of the motor; the speed regulation module comprises a brush and a copper foil arranged on the signal PCB board, wherein the brush is arranged on the movable frame and moves with the actuating mechanism, and the brush moves on the copper foil of the signal PCB board to realize the speed regulation function.

[0016] Preferably, a cavity is provided on the side of the base facing the cover shell, a spring fixing seat of the pendulum button and a brush fixing seat of the movable frame are provided in the cavity, and the front sealing groove is arranged around the periphery of the cavity; a spring through hole for exposing the commutation spring is provided on the side of the base facing the power PCB board, and the reverse sealing groove is arranged around the periphery of the spring through hole.

[0017] Compared with the prior art, the utility model has at least the following beneficial effects:

[0018] The utility model specially opens a glue filling port on the side wall of the shell, so that workers can fill sealant from the glue filling port on the side wall of the shell to form a glue filling body, and the glue filling body can further seal a small gap between the shell and the sealing sleeve assembled in the shell, thereby better improving the sealing protection performance of the DC brushless integrated switch. In addition, compared with the top glue filling, the side wall glue filling can not only be performed after the trigger is assembled, but also there is no need to wait for the glue filling to solidify before assembling the trigger, thereby simplifying the assembly process, and the side wall glue filling has a larger operating space, which is more convenient for workers to perform the glue filling operation, thereby improving the sealing effect and production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the structure of the brushless DC integrated switch with high sealing performance after being disassembled in this embodiment;

[0020] Figure 2 This is a schematic diagram of the assembled structure of the brushless DC integrated switch with high sealing performance of this embodiment;

[0021] Figure 3 It is a structural schematic diagram of the high-sealing DC brushless integrated switch of this embodiment with the cover shell, heat sink shell and trigger removed;

[0022] Figure 4 A schematic diagram of the closed portion and the open portion of the DC brushless integrated switch with high sealing performance of this embodiment;

[0023] Figure 5 is a transverse cross-sectional view of the brushless DC integrated switch with high sealing performance of this embodiment;

[0024] Figure 6 This is a schematic diagram of the sealing sleeve structure of the DC brushless integrated switch with high sealing performance in this embodiment;

[0025] Figure 7 A longitudinal cross-sectional view of a brushless DC integrated switch with high sealing performance according to the present embodiment;

[0026] Figure 8 for Figure 7 A magnified view of;

[0027] Fig. 9 for Figure 7 B enlarged view;

[0028] Fig.10 This is a schematic diagram of the front structure of a base with a movable frame and other components of a DC brushless integrated switch with high sealing performance in this embodiment;

[0029] Fig.11 It is a schematic diagram of the reverse structure of the base with components such as a movable frame of the DC brushless integrated switch with high sealing performance of this embodiment;

[0030] Fig.12 This is a schematic diagram of the front structure of the base of the DC brushless integrated switch with high sealing performance of this embodiment;

[0031] Fig.13 It is a schematic diagram of the back structure of the base of the DC brushless integrated switch with high sealing performance of this embodiment.

[0032] Description of Figure Numbers:

[0033] 1. Movable frame; 2. Trigger; 3. Sealing sleeve; 31. Head; 32. Tail; 4. Power PCB board; 5. Signal PCB board; 6. Conductive part; 7. Brush; 8. Swing button; 9. Reversing spring; 10. Cover shell; 101. Glue filling port; 11. Heat dissipation shell; 111. Closed part; 112. Open part; 12. Base; 121. Spring fixing seat; 122. Brush fixing seat; 123. Conductive part mounting seat; 124. Conductive part through hole; 125. Front sealing groove; 126. Spring through hole; 127. Reverse sealing groove; 13. Port; 14. Upper annular cavity; 15. Lower annular cavity; 16. Glue filling body; 17. First sealing part; 18. Second sealing part. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] A DC brushless integrated switch with high sealing performance, referring to Figure 1-13 The actuator includes a housing and an actuating mechanism, a reversing mechanism, a speed regulating module and a power module arranged in the housing. The actuating mechanism includes a trigger 2 and a movable frame 1. The movable frame 1 is provided with a sealing sleeve 3. Figure 6-7 The head 31 of the sealing sleeve 3 is fixed between the trigger 2 and the movable frame 1, and the tail of the sealing sleeve 3 is fixed in the housing. The side wall of the housing is provided with a glue injection port 101, and the glue injection port 101 is used to inject sealant between the housing and the sealing sleeve 3 to form a glue injection body 16. After the DC brushless integrated switch is assembled, the worker can inject sealant from the glue injection port 101 on the side wall of the housing, and the injected sealant forms a glue injection body 16 in the housing after solidification, so that the small gap between the housing and the sealing sleeve 3 assembled in the housing is further sealed by the glue injection body 16, thereby better improving the sealing protection performance of the DC brushless integrated switch. In addition, compared to setting the glue filling port on the top of the shell, the glue filling port 101 is specially opened on the side wall of the shell, so that the glue filling process will not be affected by the assembly of the trigger 2, and there is no need to wait for the glue filling to solidify before assembling the trigger 2, which not only makes the assembly process smoother and more efficient, but also the side wall glue filling has a larger operating space than the top glue filling, which is more convenient for workers to perform glue filling operations, improves the sealing effect, and also improves production efficiency.

[0036] Specifically, in this embodiment, the power module includes a power PCB board 4 and a power switch arranged on the power PCB board 4, and the power switch is connected to an external wire to realize electrical signal transmission; the speed regulation module includes a signal PCB board 5, a brush 7 and a copper foil arranged on the signal PCB board 5, the signal PCB board 5 is electrically connected to the power PCB board 4 through a conductive member 6, the brush 7 is arranged on the movable frame 1, and as the actuating mechanism moves, the brush 7 moves relatively on the copper foil of the signal PCB board 5, thereby realizing the speed regulation function; the reversing mechanism includes a pendulum button 8 and a reversing spring 9, and the reversing spring 9 is arranged on the pendulum button 8, and contacts or disconnects with the copper foil on the power PCB board 4 as the pendulum button 8 rotates, thereby realizing the reversing function of the motor.

[0037] In this embodiment, the housing includes a cover shell 10, a heat dissipation shell 11 and a base 12. Figure 4 The heat dissipation shell 11 is divided into a closed portion 111 and an open portion 112. The base 12 is fixed inside the cover shell 10 by snapping with the closed portion 111 of the heat dissipation shell 11 to form a closed area. The signal PCB board 5 is arranged in the cover shell 10 and located in the closed area; the power PCB board 4 is arranged in the heat dissipation shell 11 and located between the base 12 and the heat dissipation shell 11. The power switch is arranged on a side surface of the power PCB board 4 facing the open portion 112 of the heat dissipation shell 11.

[0038] In this embodiment, refer to Figure 7-9 The shell body has a port 13. Specifically, the base 12 and the top of the cover shell 10 are provided with opposite semicircular notches. The base 12 and the semicircular notches of the cover shell 10 are matched to form the port 13 on the shell body. The movable frame 1 is arranged between the base 12 and the cover shell 10. The upper end of the movable frame 1 with a sealing sleeve 3 extends from the port 13 and is connected to the trigger 2. The glue filling port 101 is arranged on the side wall of the cover shell 10. There is an angle between the opening direction of the glue filling port 101 and the opening direction of the port 13. Preferably, the opening direction of the glue filling port 101 is perpendicular to the opening direction of the port 13, so that workers can fill glue more conveniently.

[0039] In this embodiment, refer to Fig. 9 An annular step is provided in the shell, specifically, the base 12 and the top of the cover shell 10 are provided with opposite semicircular steps, the semicircular steps of the base 12 and the cover shell 10 are matched to form the annular step in the shell, the annular step divides the interior of the shell near the port 13 into an upper annular cavity 14 and a lower annular cavity 15, the tail 32 of the sealing sleeve 3 is embedded in the lower annular cavity 15 to achieve fixation with the shell, the glue 16 is injected through the glue injection port 101 and formed in the upper annular cavity 14, the glue 16 of the upper annular cavity 14 covers the embedding gap of the tail 32 of the sealing sleeve 3 of the lower annular cavity 15, thereby having an excellent sealing effect.

[0040] In this embodiment, refer to Figure 10-13 The side of the base 12 facing the cover shell 10 is the front side. The front side of the base 12 is provided with a cavity, a conductive member mounting seat 123 and a front sealing groove 125. The cavity is provided with a spring fixing seat 121 of the swing button and a brush fixing seat 122 of the movable frame. The conductive member mounting seat 123 is provided with a conductive member through hole 124 for mounting the conductive member 6, and the front sealing groove 125 is arranged around the cavity and the periphery of the conductive member mounting seat 123. The front sealing groove 125 is provided with a first sealing member 17. The first sealing member 17 is provided with a first sealing member 17. The seal 17 is clamped between the front side of the base 12 and the cover 10; the side of the base 12 facing the power PCB 4 is the back side, and the back side of the base 12 is provided with a spring through hole 126 and a back sealing groove 127, the spring through hole 126 is used to expose the commutation spring 9, the back sealing groove 127 is arranged around the spring through hole 126 and the conductive member through hole 124, and the back sealing groove 127 is provided with a second seal 18, and the second seal 18 is clamped between the back side of the base 12 and the power PCB 4. The arrangement of the first seal 17 and the second seal 18 enables the front and back sides of the base 12 to have a good sealing effect with the cover 10 and the power PCB 4 respectively, so that the commutation function and the speed regulation function of the motor are operated in a better sealed environment, and the sealing protection performance of the DC brushless integrated switch is improved.

[0041] In this embodiment, a hook and a hook are provided between the base 12 and the cover shell 10 to be hung and fixed mutually, and the first seal 17 is clamped and fixed between the base 12 and the cover shell 10 by hanging and fixing the base 12 and the cover shell 10 mutually; in addition, the cover shell 10 is buckled and fixed with the power PCB board 4 by setting a connecting arm, and a hook and a hook are provided between the cover shell 10 and the heat dissipation shell 11 to be hung and fixed mutually, and the second seal 18 is clamped and fixed between the base 12 and the power PCB board 4 by hanging and fixing the cover shell 10 and the heat dissipation shell 11 mutually. Fixing the first seal 17 and the second seal 18 by assembling is not only convenient for assembly, but also has a better sealing effect by fixing the first seal 17 and the second seal 18 by clamping. Of course, in other embodiments, the first seal 17 and the second seal 18 can also be fixed by other methods.

[0042] The technical solution provided by the utility model is introduced in detail above. Specific examples are used in this article to illustrate the principle and implementation mode of the utility model. The description of the above embodiments is only used to help understand the method and core idea of ​​the utility model. At the same time, for general technicians in this field, according to the idea of ​​the utility model, there will be changes in the specific implementation mode and application scope. In summary, the content of this specification should not be understood as a limitation on the utility model.

Claims

1. A brushless DC integrated switch with high sealing performance, comprising a housing and an actuating mechanism, a commutation mechanism, a speed regulating module and a power module arranged in the housing, characterized in that: The actuating mechanism includes a trigger and a movable frame, a sealing sleeve is sleeved on the movable frame, a head of the sealing sleeve is fixed between the trigger and the movable frame, a tail of the sealing sleeve is fixed in a shell, a side wall of the shell is provided with a glue filling port, and the glue filling port is used to fill sealant between the shell and the sealing sleeve to form a glue filling body.

2. A brushless DC integrated switch with high sealing performance according to claim 1, characterized in that: An annular step is provided in the shell, and the annular step separates the shell into an upper annular cavity and a lower annular cavity. The colloid is formed in the upper annular cavity, and the tail of the sealing sleeve is embedded and fixed in the lower annular cavity.

3. A brushless DC integrated switch with high sealing performance according to claim 1, characterized in that: The shell body is provided with a port, the upper end of the movable frame sleeved with the sealing sleeve extends from the port and is connected to the trigger, and an angle is formed between the opening direction of the glue injection port and the opening direction of the port.

4. A brushless DC integrated switch with high sealing performance according to claim 1, characterized in that: The shell includes a cover shell, a heat dissipation shell and a base, the heat dissipation shell is provided with a closed portion and an open portion, the base is fixed inside by the cover shell and the closed portion of the heat dissipation shell to form a closed area; the speed regulation module includes a signal PCB board, the power module includes a power PCB board electrically connected to the signal PCB board, the signal PCB board is arranged in the cover shell and located in the closed area, and the power PCB board is arranged in the heat dissipation shell and located between the base and the heat dissipation shell.

5. A brushless DC integrated switch with high sealing performance according to claim 4, characterized in that: The movable frame is arranged between the base and the cover shell, and the glue injection port is arranged on the side wall of the cover shell.

6. A brushless DC integrated switch with high sealing performance according to claim 4, characterized in that: A first sealing member is provided between the base and the cover shell, and a second sealing member is provided between the base and the power PCB board.

7. A brushless DC integrated switch with high sealing performance according to claim 6, characterized in that: The first sealing member is fixed by hanging the base and the cover shell; the second sealing member is fixed by hanging the heat dissipation shell and the cover shell.

8. A brushless DC integrated switch with high sealing performance according to claim 6, characterized in that: A front sealing groove is provided on a side of the base facing the cover shell, and the first sealing member is arranged in the front sealing groove; a back sealing groove is provided on a side of the base facing the power PCB board, and the second sealing member is arranged in the back sealing groove.

9. A brushless DC integrated switch with high sealing performance according to claim 8, characterized in that: The reversing mechanism includes a swing button and a reversing spring. The reversing spring is arranged on the swing button. As the swing button rotates, it contacts or disconnects with the copper foil on the power PCB board to realize the reversing function of the motor. The speed regulation module includes a brush and a copper foil arranged on the signal PCB board. The brush is arranged on the movable frame. As the actuating mechanism moves, the brush moves on the copper foil of the signal PCB board to realize the speed regulation function.

10. A brushless DC integrated switch with high sealing performance according to claim 9, characterized in that: A cavity is provided on the side of the base facing the cover shell, and a spring fixing seat of the swing button and a brush fixing seat of the movable frame are provided in the cavity, and the front sealing groove is arranged around the periphery of the cavity; a spring through hole for exposing the commutation spring is provided on the side of the base facing the power PCB board, and the reverse sealing groove is arranged around the periphery of the spring through hole.

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