Reversing shifting handle assembling structure and brushless signal switch based on same
By introducing a combination design of a limit rod and a limit guide bar into the reversing lever structure, the problem of force deviation during the swing of the reversing lever drive arm is solved, and uniform force is achieved on the reversing shaft, thereby improving the service life and control accuracy of the switch.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-30
- Publication Date
- 2026-03-27
AI Technical Summary
The force applied to the reversing shaft by the drive arm of a conventional reversing lever during the swinging process is biased, resulting in uneven force on the contact surface between the reversing shaft and the switch housing, excessive local wear, and reduced service life and control accuracy of the switch reversing mechanism.
The system employs a combination of a limit rod and a limit guide bar. By setting a limit groove on the limit rod and cooperating with the limit guide bar, the swing range of the drive arm is limited, causing it to move tangentially along the reversing shaft. This prevents the drive arm from swaying and ensures that the reversing shaft is only subjected to tangential force.
It improves the service life and stability of the commutation mechanism, ensures the accuracy of the commutation control, and avoids excessive wear and jamming of the commutation shaft.
Smart Images
Figure CN121748208A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the technical field of electric switch, and particularly relates to a reversing handle assembly structure and a brushless signal switch based on the structure. BACKGROUND
[0002] The brushless signal switch is a common control element used in electric tools. Due to the special needs of electric tools, the brushless signal switch is usually provided with speed regulation and reversing functions. The reversing function is mainly achieved by rotating the reversing handle connected to the switch housing to drive the reversing slider in the switch housing to slide.
[0003] The conventional reversing handle mainly relies on the reversing shaft to be connected to the switch housing. The driving arm extends reversely to the button of the switch perpendicularly to the reversing shaft so as to be used for dialing. The driving arm is in a suspended state as a whole. When the user dials the driving arm, the dialing direction is deviated upward or downward, the driving force actually received by the reversing shaft is not completely along the tangential direction, the contact surface of the reversing shaft and the switch housing is unevenly stressed, the local part is excessively worn, the reversing handle is stuck during dialing, the reversing control error is enlarged, and the use effect is affected. SUMMARY
[0004] The present application first solves the technical problem that the driving arm of the conventional reversing handle is deviated during swinging, the force applied to the reversing shaft is deviated, the contact surface of the reversing shaft and the switch housing is unevenly stressed, the local part is excessively worn, and the service life of the switch reversing mechanism is reduced.
[0005] In order to solve the above technical problems, the technical scheme adopted by the present application is: the reversing handle assembly structure comprises a switch shell, a reversing shaft rotatably connected to the switch shell, a linkage arm and a driving arm connected to the two ends of the reversing shaft respectively and extending in the radial direction of the reversing shaft in opposite directions, the linkage arm is connected to one end of the reversing shaft located in the switch shell and used for connecting a reversing slider, the reversing slider is slidably connected in the switch shell, the driving arm is connected to the other end of the reversing shaft extending out of the switch shell, and a protruding piece is vertically connected to the top surface of the end of the driving arm away from the reversing shaft, characterized in that the bottom of the driving arm is connected to a limiting rod extending downward, a limiting groove is formed in the side of the limiting rod facing the reversing shaft, a guide plate extending in the direction of the limiting rod is arranged on the outer wall of the switch shell opposite to the limiting rod, a V-shaped limiting gap is formed in the end of the guide plate away from the switch shell, the limiting rod is arranged in the limiting gap, the two inclined inner side walls of the limiting gap are used for limiting the swing range of the driving arm and the limiting rod, and a limiting guide strip matched with the limiting groove is arranged in the limiting gap, the limiting guide strip is perpendicular to the axial direction of the reversing shaft, the limiting guide strip is inserted into the limiting groove, and when the driving arm swings, the limiting rod swings along the limiting guide strip, and the limiting guide strip and the limiting groove are inserted to limit the axial movement of the limiting rod.
[0006] As a preferred scheme, the switch shell comprises a left shell and a right shell connected to each other, the guide plate comprises a left half connected to the left shell and a right half connected to the right shell, the oblique edges for forming the limiting gap are arranged on the facing sides of the left half and the right half, the limiting guide strip is integrally formed on the oblique edge of the left half, a connecting pin is connected to the end face of the end of the limiting guide strip opposite to the right half, a connecting hole matched with the connecting pin is formed in the oblique edge of the right half, and the left half and the right half are connected to form the guide plate when the left shell and the right shell are connected.
[0007] As a preferred scheme, the limiting rod is located directly below the protruding piece.
[0008] The present application further aims to solve the technical problem of providing a brushless signal switch to solve the technical problem that the reversing handle of the existing brushless signal switch is subjected to side deflection of the force applied to the reversing shaft by the driving arm during the swing process, the contact surface of the reversing shaft and the switch shell is subjected to uneven force, local excessive wear, and the service life of the switch reversing mechanism is reduced.
[0009] To solve the above technical problems, the technical scheme adopted by the present application is: the brushless signal switch comprises a switch shell, a circuit board with a reversing circuit and a speed regulating circuit is fixedly connected in the switch shell, a reversing sliding block and a speed regulating sliding block are respectively slidably connected in the switch shell on both sides of the circuit board, a push rod for driving the speed regulating sliding block to slide is slidably connected on the switch shell, one end of the push rod is inserted into the switch shell and fixedly connected with the speed regulating sliding block, the other end of the push rod extends out of the shell and is used for mounting a button, a reversing handle for driving the reversing sliding block to slide is rotatably connected on the switch shell, and the reversing handle is connected with the switch shell through the reversing handle assembly structure.
[0010] As a preferred scheme, the reversing shaft of the reversing handle is in the same plane as the push rod and perpendicular to each other, the outer end of the push rod is connected with the button, a locking piece is arranged on the middle part of the side inner wall of the switch shell in the direction of the button, the locking piece extends along the axial direction of the push rod, two guide grooves are formed between the locking piece and the inner walls on both sides of the button, the reversing sliding block has left, middle and right positions, when the reversing sliding block is in the middle position, the driving arm of the reversing handle is just located above the push rod, the limiting rod is opposite to the locking piece, the limiting rod blocks the pressing path of the button, and the brushless signal switch is locked, when the reversing sliding block is in the left or right position, the limiting rod of the reversing handle is opposite to any one of the guide grooves.
[0011] The present application has the beneficial effects that: the present application sets the limiting groove on the limiting rod and sets the limiting guide strip matched with the limiting groove, the limiting guide strip is used for limiting the axial direction of the limiting rod, and the limiting rod is used for limiting the driving arm, so that the driving arm cannot produce the up and down deflection phenomenon when the driving arm is subjected to the force of being pulled, the driving arm can only move along the tangential direction of the reversing shaft, so that the reversing shaft only receives the tangential force, the phenomenon of excessive wear of the reversing shaft is avoided, the service life and the use stability of the reversing mechanism are improved, and the accuracy of the switch reversing control is ensured. BRIEF DESCRIPTION OF DRAWINGS
[0012] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings, in which: Figure 1 is a partial exploded view of the reversing handle assembly structure of the present application; Figure 2 is Figure 1 a structural view of the switch shell assembly state in the present application; Figure 3 is Figure 2 a right half side view in the present application; Figure 4 is a three-dimensional structural explosion view of the brushless signal switch of the present application; Figure 5 is Figure 4 a schematic view of the cooperation relationship between the button and the reversing handle shown in the present application; Figures 1-5 In the middle: 1. Switch housing; 101. Left outer shell; 102. Right outer shell; 2. Reversing shaft; 3. Linkage arm; 4. Drive arm; 5. Reversing slider; 6. Actuator; 7. Limiting rod; 8. Limiting groove; 9. Guide plate; 901. Left half; 902. Right half; 10. Limiting notch; 11. Limiting guide bar; 12. Connecting pin; 13. Connecting hole; 14. Circuit board; 15. Speed regulating slider; 16. Push rod; 17. Button; 18. Reversing lever; 19. Locking plate; 20. Guide groove. Detailed Implementation
[0013] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Example 1
[0014] like Figures 1-3 The reversing lever assembly structure shown includes a switch housing 1, a reversing shaft 2 rotatably connected to the switch housing 1, a linkage arm 3 and a drive arm 4 respectively connected to both ends of the reversing shaft 2 and extending in opposite directions radially along the reversing shaft 2. The linkage arm 3 is connected to the end of the reversing shaft 2 located inside the switch housing 1 and is used to connect a reversing slider 5, which is slidably connected inside the switch housing 1. The drive arm 4 is connected to the end of the reversing shaft 2 extending outside the switch housing 1. A protruding actuating element 6 is vertically connected to the top surface of the end of the drive arm 4 away from the reversing shaft 2. A downwardly extending limiting rod 7 is connected to the bottom of the drive arm 4. A limiting groove 8 is provided on the side of the limiting rod 7 facing the reversing shaft 2. A guide plate 9 extending towards the limit rod 7 is provided on the outer wall of the switch housing 1 opposite to the limit rod 7. A V-shaped limit notch 10 is opened at the end of the guide plate 9 away from the switch housing 1. The limit rod 7 is set in the limit notch 10. The two inclined inner sidewalls of the limit notch 10 are used to limit the swing range of the drive arm 4 and the limit rod 7. A limit guide bar 11 that cooperates with the limit groove 8 is provided in the limit notch 10. The limit guide bar 11 is perpendicular to the axial direction of the reversing shaft 2. The limit guide bar 11 is inserted into the limit groove 8. When the drive arm 4 swings, the limit rod 7 swings along the limit guide bar 11. The limit guide bar 11 is inserted into the limit groove 8 to limit the axial movement of the limit rod 7.
[0015] By setting a limiting groove 8 on the limiting rod 7 and setting a limiting guide 11 that matches the limiting groove 8, the limiting guide 11 is used to axially limit the limiting rod 7. The limiting rod 7 is used to restrain the drive arm 4, preventing the drive arm 4 from swaying up and down when subjected to a turning force. This ensures that the drive arm 4 can only move along the tangential direction of the reversing shaft 2, so that the reversing shaft 2 is only subjected to tangential force. This avoids excessive wear of the reversing shaft 2, improves the service life and stability of the reversing mechanism, and thus ensures the accuracy of the switch reversing control.
[0016] The switch housing 1 includes a left outer shell 101 and a right outer shell 102 that are connected to each other. The guide plate 9 includes a left half 901 connected to the left outer shell 101 and a right half 902 connected to the right outer shell 102. The left half 901 and the right half 902 have inclined sides facing each other to form a limiting notch 10. The limiting guide strip 11 is integrally formed on the inclined side of the left half 901. A connecting pin 12 is connected to the end face of the limiting guide strip 11 facing the right half 902. A connecting hole 13 adapted to the connecting pin 12 is opened on the inclined side of the right half 902. When the left outer shell 101 and the right outer shell 102 are connected, the left half 901 and the right half 902 are connected to form the guide plate 9, and the connecting pin 12 is inserted into the connecting hole 13.
[0017] The limit guide bar 11 is set on the right half 901 and connected to the right half 902 by the connecting pin 12. This ensures the integrity and surface flatness of the limit guide bar 11 and ensures that the limit rod 7 moves smoothly along the limit guide bar 11.
[0018] The limiting rod 7 is located directly below the actuating element 6, which is operated by the user. When the user performs a reversing operation, force is applied to the actuating element 6, so the actuating element 6 is easily subjected to downward pressure. By placing the limiting rod 7 directly below the actuating element 6, the downward pressure received by the actuating element 6 is directly offset, thus preventing the drive arm 4 from bending and deforming. Example 2
[0019] like Figure 4 The brushless signal switch shown includes a switch housing 1. A circuit board 14 with a commutation circuit and a speed control circuit is fixedly connected inside the switch housing 1. A commutation slider 5 and a speed control slider 15 are slidably connected to the switch housing 1 on both sides of the circuit board 14. A push rod 16 for driving the speed control slider is slidably connected to the switch housing 1. One end of the push rod 16 is inserted into the switch housing 1 and fixedly connected to the speed control slider 15; the other end extends out of the switch housing 1 for mounting a button 17. A commutation lever 18 for driving the commutation slider 5 is also rotatably connected to the switch housing 1. Figure 1 As shown, the reversing lever 18 includes a reversing shaft 2, a linkage arm 3, and a drive arm 4 that are connected to each other. The reversing lever 18 is connected to the switch housing 1 using the reversing lever assembly structure described in Embodiment 1 above.
[0020] The reversing shaft 2 of the reversing lever 18 and the push rod 16 are on the same plane and perpendicular to each other. A button 17 is connected to the outer end of the push rod 16. Figure 5As shown, the button 17 is provided with a locking piece 19 in the middle of the inner wall of one side of the switch housing 1, which extends along the axial direction of the push rod 16, and two guide grooves 20 are formed between the locking piece 19 and the inner walls on both sides of the button 17. The reversing slider 5 has left, middle and right positions. When the reversing slider 5 is in the middle position, the driving arm 4 of the reversing handle 18 is just above the push rod 16, the limiting rod 7 is opposite to the locking piece 19, and the limiting rod 7 blocks the pressing path of the button 17, thereby locking the brushless signal switch. When the reversing slider 5 is in the left or right position, the limiting rod 7 of the reversing handle 18 is opposite to any one of the guide grooves 20.
[0021] The working process of the present application is as follows: when the user rotates the driving arm 4 of the reversing handle, the limiting guide strip 11 limits the swinging direction of the driving arm 4 through the limiting rod 7, so as to avoid the deviation of the driving arm 4 along the axial direction of the reversing shaft 2, thereby eliminating the force other than the tangential force on the reversing shaft 2, solving the technical problem that the force applied by the driving arm of the conventional reversing handle 18 on the reversing shaft 2 is deviated during the swinging process, the contact surface of the reversing shaft 2 and the switch housing 1 is unevenly stressed, and the local excessive wear reduces the service life of the switch reversing mechanism.
[0022] The above embodiments only exemplarily illustrate the principles and effects of the present application, and part of the applied embodiments, and are not used to limit the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.
Claims
1. A reversing lever assembly structure, characterized in that, The switch includes a switch housing (1), a reversing shaft (2) rotatably connected to the switch housing (1), a linkage arm (3) and a drive arm (4) respectively connected to both ends of the reversing shaft (2) and extending in the opposite direction of the reversing shaft (2) radially. The linkage arm (3) is connected to one end of the reversing shaft (2) located inside the switch housing (1) and is used to connect a reversing slider (5). The reversing slider (5) is slidably connected inside the switch housing (1). The drive arm (4) is connected to one end of the reversing shaft (2) extending outside the switch housing (1). The top surface of the drive arm (4) away from the reversing shaft (2) is vertically connected to an upwardly protruding toggle element (6). The drive arm (4) is characterized by having a downwardly extending limiting rod (7) connected to the bottom of the drive arm (4). The limiting rod (7) has a limiting groove (8) on the side facing the reversing shaft (2). A guide plate (9) extending toward the limit rod (7) is provided on the outer wall of the housing (1) opposite to the limit rod (7). A V-shaped limit notch (10) is provided at the end of the guide plate (9) away from the switch housing (1). The limit rod (7) is provided in the limit notch (10). The two inclined inner walls of the limit notch (10) are used to limit the swing range of the drive arm (4) and the limit rod (7). A limit guide bar (11) that cooperates with the limit groove (8) is provided in the limit notch (10). The limit guide bar (11) is perpendicular to the axial direction of the reversing shaft (2). The limit guide bar (11) is inserted into the limit groove (8). When the drive arm (4) swings, the limit rod (7) swings along the limit guide bar (11). The limit guide bar (11) is inserted into the limit groove (8) to limit the axial movement of the limit rod (7).
2. The reversing lever assembly structure according to claim 1, characterized in that, The switch housing (1) includes a left outer shell (101) and a right outer shell (102) that are connected to each other. The guide plate (9) includes a left half (901) connected to the left outer shell (101) and a right half (902) connected to the right outer shell (102). The left half (901) and the right half (902) are provided with inclined sides on opposite sides to form a limiting notch (10). The limiting guide strip (11) is integrally formed on the left half. On the hypotenuse of (901), a connecting pin (12) is connected to the end face of the limiting guide (11) facing the right half (902). A connecting hole (13) adapted to the connecting pin (12) is opened on the hypotenuse of the right half (902). When the left shell (101) and the right shell (102) are connected, the left half (901) and the right half (902) are connected to form a guide plate (9), and the connecting pin (12) is inserted into the connecting hole (13).
3. The reversing lever assembly structure according to claim 1, characterized in that, The limiting rod (7) is located directly below the toggle member (6), which is toggled by the user.
4. A brushless signal switch, comprising a switch housing (1), a circuit board (14) with a commutation circuit and a speed control circuit fixedly connected inside the switch housing (1), a commutation slider (5) and a speed control slider (15) slidably connected inside the switch housing (1) on both sides of the circuit board (14), a push rod (16) for driving the speed control slider to slide slidably connected on the switch housing (1), one end of the push rod (16) being inserted into the switch housing (1) and fixedly connected to the speed control slider (15), and the other end extending out of the switch housing (1) for mounting a button (17), and a commutation lever (18) for driving the commutation slider (5) to slide rotatably connected on the switch housing (1), the commutation lever (18) comprising a commutation shaft (2), a linkage arm (3) and a drive arm (4) connected to each other, characterized in that, The reversing lever (18) is connected to the switch housing (1) using the reversing lever assembly structure described in any one of claims 1 to 3.
5. The brushless signal switch according to claim 4, characterized in that, The reversing shaft (2) of the reversing lever (18) and the push rod (16) are on the same plane and perpendicular to each other. The outer end of the push rod (16) is connected to a button (17). A locking plate (19) is provided in the middle of the inner wall of the button (17) facing the switch housing (1). The locking plate (19) extends along the axial direction of the push rod (16). Two guide grooves (20) are formed between the locking plate (19) and the inner walls on both sides of the button (17). The reversing slider (5) The reversing slider (5) has three positions: left, middle, and right. When the reversing slider (5) is in the middle position, the drive arm (4) of the reversing lever (18) is located directly above the push rod (16), the limit rod (7) is directly opposite the locking piece (19), and the limit rod (7) blocks the downward path of the button (17) to lock the brushless signal switch. When the reversing slider (5) is in the left or right position, the limit rod (7) of the reversing lever (18) is directly opposite any guide groove (20).