Long-life reversing mechanism applied to reversing switch

Abstract

The utility model relates to a long-life reversing mechanism applied to a reversing switch, which can effectively prolong the service life of the reversing mechanism and keep the reversing hand feeling of the reversing mechanism consistent for a long time by connecting a metal shifting plate at the free end of a shifting sheet and utilizing the metal shifting plate to abut against a steel ball. Meanwhile, an auxiliary hole is formed in one side of the mounting hole, and a reinforcing body is integrally formed on one side of the plug, so that the connecting strength of the plug and the base is improved, the supporting stability of the plug to the spring is improved, and the reversing hand feeling of the reversing mechanism is further ensured to be kept consistent for a long time.

Description

Technical Field

[0001] This utility model belongs to the field of switch technology, specifically relating to a long-life commutation mechanism applied to commutation switches. Background Technology

[0002] Currently, in the application of power tool switches, the reversing mechanism usually achieves the switching of gears by cooperating with a steel ball spring or spring and a reversing lever. For example, the reversing mechanism disclosed in the utility model patent with publication number CN211578599U entitled "A Sliding Switch Reversing Mechanism" and the invention with publication number CN111292975B entitled "Gear Reversing Mechanism Applied to Power Tool Switches" are usually made of plastic material and directly contact the steel ball or metal spring. This makes the lever prone to wear. With the increase of use, the reversing feel (force value) will decrease with the increase of use, affecting the reversing feel and stability of the switch. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a long-life commutation mechanism for commutation switches that can maintain a consistent commutation feel over a long period of time.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A long-life reversing mechanism applied to a reversing switch, characterized in that it includes a base of the switch, a reversing slider slidably connected to the base, and a lever rotatably connected to the base. One end of the lever is a rotating shaft rotatably connected to the base, and the other end extends radially out of the switch base for manual operation. A paddle is connected to the rotating shaft, extending radially into the base and drivingly connected to the reversing slider. A lever is connected to the paddle, and the lever is inserted into a guide groove on the reversing slider to drive the reversing slider to slide in a predetermined sliding direction. A reversing spring is also connected to the upper part. The lever drives the lever to swing through the rotating shaft. The lever on the lever slides in the guide groove, thereby driving the reversing slider to slide. A metal plate is connected to the free end of the lever. The end of the metal plate away from the rotating shaft protrudes from the lever and is provided with at least one positioning groove. A mounting hole is opened on the base, which is directly opposite to the positioning groove of the metal plate. A spring and a steel ball are installed in the mounting hole. The steel ball abuts against the metal plate under the elastic force of the spring. The central axis of the mounting hole intersects perpendicularly with the central axis of the rotating shaft.

[0005] As a preferred embodiment, the thickness of the metal dial plate is less than the thickness of the dial blade. The free end of the dial blade has a groove that fits tightly with the metal dial plate. The side of the metal dial plate facing away from the positioning groove has two outwardly protruding hooks. The bottom of the groove of the dial blade has a slot that engages with the hooks. The metal dial plate is embedded in the groove and the hooks are inserted into the slots and engaged with the slots. The edges of the metal dial plate on both sides of the positioning groove extend smoothly in a concave arc shape until they are flush with the end face of the free end of the dial blade.

[0006] As a preferred embodiment, the mounting hole is a through hole, and the end of the mounting hole away from the metal dial is sealed with a plug.

[0007] As a preferred embodiment, the plug has a circumferentially surrounding convex ring in the middle, and the inner wall of the mounting hole has an annular groove that mates with the convex ring. The engagement between the convex ring and the annular groove makes the connection between the plug and the mounting hole more secure.

[0008] As a preferred embodiment, an auxiliary hole with a width smaller than that of the mounting hole is provided on one side of the mounting hole. The depth of the auxiliary hole is less than that of the mounting hole. The auxiliary hole is connected to the side of the mounting hole. A reinforcing body is embedded in the auxiliary hole. The reinforcing body is integrally formed with the plug. The convex ring extends to both sides of the reinforcing body, and the annular groove extends to the inner walls of both sides of the auxiliary hole. The reinforcing body is used to improve the friction between the plug and the base and improve the connection reliability between the plug and the base.

[0009] As a preferred embodiment, the axial direction of the mounting hole forms a certain angle α with the plane containing the convex ring, where 60° < α < 90°.

[0010] The beneficial effects of this invention are as follows: By connecting a metal plate to the free end of the paddle, and utilizing the contact between the metal plate and the steel ball, this invention effectively improves the service life of the reversing mechanism and ensures a consistent reversing feel over a long period. Furthermore, by providing an auxiliary hole on one side of the mounting hole and integrally forming a reinforcing body on one side of the plug, this invention enhances the connection strength between the plug and the base, improves the stability of the plug's support for the spring, and further ensures a consistent reversing feel over the long term. Attached Figure Description

[0011] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 This is a three-dimensional structural diagram of the assembled state of a specific embodiment of this utility model;

[0013] Figure 2 This is an exploded view of a specific embodiment of this utility model;

[0014] Figure 3This is a partial cross-sectional view of the specific connection structure between the metal dial plate and the dial piece in a specific embodiment of this utility model;

[0015] Figure 4 This is a schematic diagram showing the positional relationship between the mounting hole and the protruding ring in a specific embodiment of this utility model;

[0016] Figures 1-4 In the middle: 1. Base; 2. Reversing slider; 3. Handle; 4. Rotating shaft; 5. Paddle; 6. Guide groove; 7. Reversing spring; 8. Paddle rod; 9. Metal paddle plate; 9a. Edge; 10. Positioning groove; 11. Mounting hole; 12. Spring; 13. Steel ball; 14. Insert groove; 15. Hook; 16. Slot; 17. Plug; 18. Protruding ring; 19. Annular groove; 20. Auxiliary hole; 21. Reinforcing body. Detailed Implementation

[0017] The specific implementation scheme of this utility model will now be described in detail with reference to the accompanying drawings.

[0018] To clearly illustrate the structure of this embodiment, the following description is provided: Figure 1 and Figure 2 The base 1 of the switch has been partially cut out, but this does not affect the understanding of the specific structure of this embodiment by those skilled in the art.

[0019] like Figures 1-4 The long-life commutation mechanism shown is applied to a commutator switch and includes a switch base 1, a commutator slider 2 slidably connected to the base 1, and a lever 3 rotatably connected to the base 1. One end of the lever 3 is a rotating shaft 4 rotatably connected to the base 1, and the other end extends radially out of the switch base 1 for manual operation. A paddle 5 is connected to the rotating shaft 4, extending radially into the base 1 and drivingly connected to the commutator slider 2. A lever 8 is connected to the paddle 5, and the lever 8 is inserted into a guide groove 6 on the commutator slider 2 to drive the commutator slider 2 to slide in a predetermined sliding direction. A commutator is also connected to the commutator slider 2. The spring 7 and the lever 3 drive the paddle 5 to swing via the rotating shaft 4. The lever 8 on the paddle 5 slides in the guide groove 6, thereby driving the reversing slider 2 to slide. A metal plate 9 is connected to the free end of the paddle 5. The end of the metal plate 9 away from the rotating shaft 4 protrudes from the paddle 5 and is provided with a positioning groove 10. The base 1 has a mounting hole 11 that is directly opposite the positioning groove 10 of the metal plate 9. A spring 12 and a steel ball 13 are installed in the mounting hole 11. The steel ball 13 abuts against the metal plate 9 under the elastic force of the spring 12. The central axis of the mounting hole 11 intersects perpendicularly with the central axis of the rotating shaft 4. The end of the metal plate 9 protruding from the paddle 5 is in an "M" shape.

[0020] In this embodiment, by connecting a metal lever 9 to the free end of the lever 5, and using that metal lever 9 to abut against the steel ball 12, the service life of the reversing mechanism can be effectively improved, and the reversing feel of the reversing mechanism can be kept consistent over a long period of time.

[0021] In practical applications, users can add 10 positioning slots depending on the number of gears.

[0022] like Figure 3 As shown, in this embodiment, the thickness of the metal dial 9 is less than that of the dial 5. The free end of the dial 5 has a groove 14 that fits snugly with the metal dial 9. Two outwardly protruding hooks 15 are provided on the side of the metal dial 9 facing away from the positioning groove 10. The bottom of the groove 14 of the dial 5 has a slot 16 that engages with the hooks 15. The metal dial 9 is embedded in the groove 14, and the hooks 15 are inserted into the slot 16 and engaged. This connection structure prevents the metal dial 9 from sliding along the extension direction of the groove 14, improving the connection stability of the metal dial 9. The edges 9a of the metal dial 9 located on both sides of the positioning groove 10 extend smoothly in a concave arc shape to be flush with the end face of the free end of the dial 5. This improves the smoothness of the steel ball 13 when entering or sliding out of the positioning groove 10, while minimizing the length of the metal dial 9 exposed above the dial 5, making the metal dial 9 more stable and less prone to wobbling.

[0023] like Figure 2 As shown, in this embodiment, the mounting hole 11 is a through hole, and the end of the mounting hole 11 away from the metal lever 9 is sealed by a plug 17. In practical applications, the mounting hole 11 can be a blind hole, but a blind hole would make it difficult to assemble the spring 12 and the steel ball 13. When the mounting hole 11 is a through hole, the user can install the steel ball 13 and the spring 12 from the outside of the base after assembling the lever, which greatly improves the convenience of assembly.

[0024] In this embodiment, a circumferentially surrounding protruding ring 18 is preferably provided in the middle of the plug 17, and an annular groove 19 that cooperates with the protruding ring 18 is provided on the inner wall of the mounting hole 11. The protruding ring 18 and the annular groove 19 are engaged to make the connection between the plug 17 and the mounting hole 11 more stable.

[0025] Considering that the plug 17 is subjected to the thrust of the spring 12 for a long time, there is a risk that it may be pushed out of the mounting hole 11 by the spring 12 in a cold shrinkage state. In this embodiment, an auxiliary hole 20 with a width smaller than the width of the mounting hole 11 is further provided on one side of the mounting hole 11. The depth of the auxiliary hole 20 is less than the depth of the mounting hole 11. The auxiliary hole 20 is connected to the side of the mounting hole 11. A reinforcing body 21 is embedded in the auxiliary hole 20. The reinforcing body 21 is integrally formed with the plug 17. The convex ring 18 extends to both sides of the reinforcing body 21, and the annular groove 19 extends to the inner walls of both sides of the auxiliary hole 20. The reinforcing body 21 is used to improve the friction between the plug 17 and the base 1 and improve the connection reliability between the plug 17 and the base 1.

[0026] like Figure 4 As shown, in this embodiment, the axial direction of the mounting hole 11 is further set at a certain angle α with the plane where the convex ring 18 is located, 60° < α < 90°, and in this embodiment α = 82°. The inclined positional relationship between the axial direction of the mounting hole 11 and the plane where the convex ring 18 is located allows the convex ring 18 to be subjected to a force perpendicular to the inner wall of the annular groove 19 when the plug 17 receives the elastic force of the spring 12. This improves the blocking effect of the convex ring 18 on the plug 17 and enhances the connection reliability between the plug 17 and the mounting hole 11.

[0027] The working process of this utility model is as follows: Figures 1-4 As shown in the figure, the reversing mechanism is assembled. When in use, the user moves the lever 3, which drives the rotating shaft 4 to rotate. The rotating shaft drives the lever 5, lever 8, and metal lever 9 to swing. The swing of lever 8 drives the reversing slider 2 to slide. The sliding of reversing slider 2 drives the reversing spring 7 to slide. The reversing spring 7 is in contact with the reversing copper foil on the PCB board, thereby realizing the function of switching the current direction or the motor rotation direction.

[0028] The oscillation of the metal lever 9 causes the steel ball 13 to jump within or outside the positioning groove 10. The steel ball 13 slides on the end face of the metal lever 9, sliding from outside the positioning groove 10 into the positioning groove 10, or from inside the positioning groove 10 out of the positioning groove 10. During the jumping process of the steel ball 13, the user can clearly feel the resistance before the jump and the relaxation after the jump, allowing the user to accurately perceive the state of the reversing mechanism.

[0029] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some examples of its application, and are not intended to limit the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these modifications and improvements are all within the scope of protection of the present invention.

Claims

1. A long-life reversing mechanism for a reversing switch, comprising a base (1) of the switch, a reversing slider (2) slidably connected to the base (1), and a lever (3) rotatably connected to the base (1). One end of the lever (3) is a rotating shaft (4) rotatably connected to the base (1), and the other end extends radially to the outside of the switch base (1) for manual operation. A device is connected to the rotating shaft (4) extending radially into the base (1) and connected to the reversing slider (2). A paddle (5) is connected to a transmission connection. A lever (8) is connected to the paddle (5). The lever (8) is inserted into a guide groove (6) on the reversing slider (2) to drive the reversing slider (2) to slide in a predetermined sliding direction. A reversing spring (7) is also connected to the reversing slider (2). The paddle handle (3) drives the paddle (5) to swing through the rotating shaft (4). The lever (8) on the paddle (5) slides in the guide groove (6) and thus drives the reversing slider (2) to slide. The characteristic of this system is that... The free end of the paddle (5) is connected to a metal paddle plate (9). The end of the metal paddle plate (9) away from the rotating shaft (4) protrudes from the paddle (5) and is provided with at least one positioning groove (10). The base (1) is provided with a mounting hole (11) that is directly opposite to the positioning groove (10) of the metal paddle plate (9). A spring (12) and a steel ball (13) are installed in the mounting hole (11). The steel ball (13) abuts against the metal paddle plate (9) under the elastic force of the spring (12). The central axis of the mounting hole (11) intersects the central axis of the rotating shaft (4) perpendicularly.

2. The long-life commutation mechanism according to claim 1, characterized in that, The thickness of the metal dial (9) is less than that of the dial (5). The free end of the dial (5) is provided with a groove (14) that fits tightly with the metal dial (9). The side of the metal dial (9) facing away from the positioning groove (10) is provided with two outwardly protruding hooks (15). The bottom of the groove (14) of the dial (5) is provided with a slot (16) that cooperates with the hooks (15). The metal dial (9) is embedded in the groove (14) and the hooks (15) are inserted into the slot (16) and engaged with the slot (16). The edges of the metal dial (9) on both sides of the positioning groove (10) extend smoothly in a concave arc shape to be flush with the end face of the free end of the dial (5).

3. The long-life commutation mechanism according to claim 1, characterized in that, The mounting hole (11) is a through hole, and the end of the mounting hole (11) away from the metal dial plate (9) is sealed by a plug (17).

4. The long-life commutation mechanism according to claim 3, characterized in that, The plug (17) has a circumferentially surrounding convex ring (18) in the middle, and the inner wall of the mounting hole (11) has an annular groove (19) that mates with the convex ring (18). The convex ring (18) and the annular groove (19) engage to make the plug (17) and the mounting hole (11) more securely connected.

5. The long-life commutation mechanism according to claim 4, characterized in that, An auxiliary hole (20) with a width smaller than that of the mounting hole (11) is provided on one side of the mounting hole (11). The depth of the auxiliary hole (20) is smaller than that of the mounting hole (11). The auxiliary hole (20) is connected to the side of the mounting hole (11). A reinforcing body (21) is embedded in the auxiliary hole (20). The reinforcing body (21) is integrally formed with the plug (17). The convex ring (18) extends to both sides of the reinforcing body (21). The annular groove (19) extends to the inner walls on both sides of the auxiliary hole (20). The reinforcing body (21) is used to improve the friction between the plug (17) and the base (1) and improve the connection reliability between the plug (17) and the base (1).

6. The long-life commutation mechanism according to claim 5, characterized in that, The axial direction of the mounting hole (11) forms a certain angle α with the plane where the convex ring (18) is located, 60°<α<90°.

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