Adjusting and shifting mechanism of change-over switch

Abstract

The utility model relates to an adjusting and shifting mechanism of a reversing switch, which comprises a reversing shifting handle and a positioning steel ball which are oppositely arranged, a rotating shaft is arranged in the middle of the reversing shifting handle, the rotating shaft is used for being rotatably connected with a shell of the reversing switch, and the positioning steel ball is arranged at one end of the reversing shifting handle and directly faces the end face of one end of the reversing shifting handle. A spring is arranged on the side, away from the reversing shifting handle, of the positioning steel ball, one end of the spring abuts against the positioning steel ball, the other end of the spring is fixed, and the spring provides pushing force for the positioning steel ball. A plurality of grooves which are distributed at equal intervals in the circumferential direction of the rotating shaft are formed in the face, right opposite to the positioning steel balls, of the wear-resisting metal sheet, and the grooves are matched with the positioning steel balls; the utility model can solve the technical problems that the gear switching assisting feeling of the reversing shifting handle is not obvious and the positioning effect of the positioning steel ball is reduced because the reversing shifting handle and the positioning steel ball are easily abraded due to sliding friction.

Description

Technical Field

[0001] The utility model belongs to the technical field of switches, and in particular relates to a dialing mechanism of a reversing switch. Background Art

[0002] Many power tools use a reversing speed control switch as a control component to adjust the power tool's rotation direction and speed. The reversing module of a reversing speed control switch typically consists of a dial mechanism and a slider. The dial mechanism consists of a reversing dial handle, a positioning steel ball, and a spring. Multiple grooves are provided on one end of the reversing dial handle to engage with the positioning steel ball. When the reversing hook handle rotates, different grooves are switched to engage with the positioning steel ball, thereby positioning the reversing dial handle in different positions to achieve gear switching. The reversing dial handle is provided with a rocker arm inserted into the slider. As the reversing dial handle rotates, the rocker arm also rotates. This rotation drives the slider to slide, and the contact piece mounted on the slider changes its contact position with the copper foil on the switch, thereby adjusting the power tool's rotation direction. However, conventional reversing dial handles are entirely made of plastic. The end that contacts the positioning steel ball is prone to wear due to long-term sliding friction with the positioning steel ball. This gradually results in a lack of noticeable resistance to gear switching when the reversing dial handle is rotated, and the positioning steel ball's positioning effect is reduced, affecting normal user use. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a dial mechanism for a reversing switch, which solves the technical problem that the reversing handle and the positioning steel ball are easily worn due to sliding friction, resulting in unclear power assistance feeling of the reversing handle gear switching and reduced positioning effect of the positioning steel ball.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a dial mechanism of a reversing switch, comprising a reversing handle and a positioning steel ball arranged relatively to each other, a rotating shaft being provided in the middle of the reversing handle, the rotating shaft being used to be rotatably connected to the housing of the reversing switch, the positioning steel ball being provided at one end of the reversing handle and facing the end face of one end of the reversing handle, a spring being provided on the side of the positioning steel ball away from the reversing handle, one end of the spring being in contact with the positioning steel ball, and the other end being fixed, the spring providing thrust to the positioning steel ball, a wear-resistant metal sheet being fixedly provided on the end face of the reversing handle facing the positioning steel ball, a plurality of grooves equidistantly distributed along the circumference of the rotating shaft being provided on the side of the wear-resistant metal sheet facing the positioning steel ball, the grooves being adapted to the positioning steel ball, and a dial rod being vertically provided on the end of the reversing handle away from the positioning steel ball.

[0005] As a preferred solution, two pins are provided on the side of the wear-resistant metal sheet facing the reversing handle, and two slots corresponding to the two pins are provided on the end of the reversing handle facing the wear-resistant metal sheet. The wear-resistant metal sheet is connected to the reversing handle through the two pins.

[0006] As a preferred solution, a spring plug is provided at the end of the spring facing away from the positioning steel ball, and a spring hole for inserting the spring is provided on the housing of the reversing switch. A plug hole with a diameter larger than the spring hole is coaxially provided at the end of the spring hole away from the reversing handle. The plug hole forms an opening on the housing, and the spring plug is inserted into the housing and embedded in the plug hole to enclose the spring in the spring hole.

[0007] As a preferred solution, a circumferentially extending annular groove is provided on the inner wall of the plug hole, and an annular clip that matches the annular groove is provided on the outer circumference of the spring plug. After the spring plug is inserted into the plug hole, the annular clip is inserted into the annular groove so that the spring plug cannot exit the plug hole.

[0008] As a preferred solution, most of the positioning steel balls are embedded in the spring holes, and the wear-resistant metal sheet follows the reversing handle to swing back and forth at the mouth of the spring hole to switch between different grooves and cooperate with the positioning steel balls.

[0009] As a preferred solution, one end of the reversing handle close to the wear-resistant metal sheet is vertically connected to a rocker rod, which is used to connect to a reversing slider in the switch to drive the reversing slider to slide.

[0010] The beneficial effect of the present invention is that a wear-resistant metal sheet is arranged at the end of the reversing handle facing the positioning steel ball, and the gear adjustment is achieved by abutting the wear-resistant metal sheet with the positioning steel ball, thereby avoiding direct abutment and friction between the positioning steel ball and the plastic reversing handle. The wear-resistant metal sheet has good wear resistance, so it can still maintain its shape for a long time under the condition of sliding friction with the positioning steel ball, and the technical problems of unclear gear switching resistance and reduced positioning effect of the positioning steel ball when the reversing handle is rotated due to wear will not occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 This is a schematic diagram of the connection structure between the reversing handle and the wear-resistant metal sheet;

[0014] Figure 1 and Figure 2 Middle: 1. Reversing handle, 101. Rotating shaft, 102. Lever, 103. Slot, 104. Rocker, 2. Positioning steel ball, 3. Housing, 4. Spring, 5. Wear-resistant metal sheet, 501. Pin, 6. Groove, 7. Spring plug, 8. Spring hole, 9. Plug hole, 10. Annular slot, 11. Annular clip, 12. Reversing slider. DETAILED DESCRIPTION

[0015] The specific implementation scheme of the present utility model is described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 and Figure 2 The shown toggle mechanism of a reversing switch includes a reversing handle 1 and a positioning steel ball 2 arranged relatively to each other. A rotating shaft 101 is provided in the middle of the reversing handle 1, and the rotating shaft 101 is used to be rotatably connected to the housing 3 of the reversing switch. The positioning steel ball 2 is provided at one end of the reversing handle 1 and is opposite to the end face of one end of the reversing handle 1. A spring 4 is provided on the side of the positioning steel ball 2 away from the reversing handle 1. One end of the spring 4 abuts against the positioning steel ball 2, and the other end is fixed. The spring 4 provides thrust to the positioning steel ball 2, and is characterized in that a wear-resistant metal sheet 5 is fixedly provided on the end face of the reversing handle 1 facing the positioning steel ball 2, and a surface of the wear-resistant metal sheet 5 facing the positioning steel ball 2 is provided with a plurality of grooves 6 distributed at equal intervals along the circumference of the rotating shaft 101, and the grooves 6 are adapted to the positioning steel ball 2. A lever 102 is vertically provided at the end of the reversing handle 1 away from the positioning steel ball 2.

[0017] A wear-resistant metal sheet 5 is provided at the end of the reversing handle 1 facing the positioning steel ball 2, and the gear adjustment is achieved by abutting the wear-resistant metal sheet 5 with the positioning steel ball 2, thereby avoiding direct abutment and friction between the positioning steel ball 2 and the plastic reversing handle 1. The wear-resistant metal sheet 5 has good wear resistance, so it can still maintain its shape for a long time under the condition of sliding friction with the positioning steel ball 2, and maintain the resistance when the reversing handle is rotated to switch gears for a long time. It can also effectively maintain a good matching relationship between the positioning steel ball and the groove 6, thereby ensuring the positioning effect of the positioning steel ball 2.

[0018] like Figure 2 As shown, the wear-resistant metal sheet 5 of this embodiment is provided with two latches 501 on the side facing the reversing handle 1. The reversing handle 1 has two slots 103 on the end facing the wear-resistant metal sheet 5, corresponding to the two latches 501. The wear-resistant metal sheet 501 is plugged into the reversing handle 1 via the two latches 501. In actual production, the wear-resistant metal sheet 5 and the reversing handle 1 are integrally formed using insert injection molding, which further improves the reliability of the connection between the two.

[0019] like Figure 1 As shown, in this embodiment, a spring plug 7 is provided at the end of the spring 4 facing away from the positioning steel ball 2, and a spring hole 8 for inserting the spring 4 is provided on the housing 3 of the reversing switch. A plug hole 9 with a diameter larger than the spring hole 8 is coaxially provided at the end of the spring hole 8 away from the reversing handle 1. The plug hole 9 forms an opening on the housing 3, and the spring plug 7 is inserted into the housing 3 and embedded in the plug hole 9, thereby enclosing the spring 4 in the spring hole 8.

[0020] The opening of the plug hole 9 can greatly facilitate the installation of the positioning steel ball 2 and the spring 4, and the use of spring plugs 7 of different lengths can also adjust the preload of the spring 4, thereby adjusting the resistance when the reversing handle 1 rotates.

[0021] The inner wall of the plug hole 9 is provided with a circumferentially extending annular groove 10, and the outer circumferential surface of the spring plug 7 is provided with an annular retaining strip 11 adapted to the annular retaining groove 10. After the spring plug 7 is inserted into the plug hole 9, the annular retaining strip 11 is engaged with the annular retaining groove 10, preventing the spring plug 7 from exiting the plug hole 9. This structure not only ensures a reliable connection between the spring plug 7 and the plug hole 9, but also further improves the sealing performance of the plug hole 9.

[0022] like Figure 1 As shown, most of the positioning steel ball 2 is embedded in the spring hole 8, and the wear-resistant metal sheet 5 follows the reversing handle 1 to swing back and forth at the mouth of the spring hole 8 to switch different grooves 6 and cooperate with the positioning steel ball 2, thereby realizing the adjustment of forward rotation, idling, and reverse gears.

[0023] In this embodiment, a rocker rod 104 is vertically connected to the end of the reversing handle 1 close to the wear-resistant metal sheet 5. The rocker rod 104 is used to connect to the reversing slider 12 in the switch to drive the reversing slider 12 to slide, thereby switching between forward and reverse rotation.

[0024] The working principle of the present invention is as follows: the present invention arranges a wear-resistant metal sheet 5 at one end of the reversing handle 1 facing the positioning steel ball 2, and utilizes the wear-resistant metal sheet 5 to abut against the positioning steel ball 2 to achieve gear adjustment, thereby avoiding direct abutment and friction between the positioning steel ball 2 and the reversing handle 1 made of plastic. The wear-resistant metal sheet 5 has good wear resistance, so it can still maintain its shape unchanged for a long time under the condition of sliding friction with the positioning steel ball 2, and maintain the resistance when the reversing handle is rotated to switch gears for a long time, and can also effectively maintain a good matching relationship between the positioning steel ball and the groove 6, thereby ensuring the positioning effect of the positioning steel ball 2.

[0025] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A switching mechanism of a reversing switch, comprising a reversing handle (1) and a positioning steel ball (2) arranged relatively to each other, wherein a rotating shaft (101) is provided in the middle of the reversing handle (1), and the rotating shaft (101) is used to be rotatably connected to a housing (3) of the reversing switch, and the positioning steel ball (2) is provided at one end of the reversing handle (1) and is directly opposite to an end face of the reversing handle (1), and a spring (4) is provided on a side of the positioning steel ball (2) away from the reversing handle (1), one end of the spring (4) is in contact with the positioning steel ball (2), and the other end is fixed, and the spring (4) provides a thrust to the positioning steel ball (2), characterized in that A wear-resistant metal sheet (5) is fixedly provided on the end face of the reversing handle (1) facing the positioning steel ball (2), and a plurality of grooves (6) distributed at equal intervals along the circumference of the rotating shaft (101) are provided on the side of the wear-resistant metal sheet (5) facing the positioning steel ball (2), and the grooves (6) are adapted to the positioning steel ball (2). A lever (102) is vertically provided on the end of the reversing handle (1) away from the positioning steel ball (2).

2. The adjustment mechanism of the reversing switch according to claim 1, characterized in that: Two latches (501) are provided on one side of the wear-resistant metal sheet (5) facing the reversing lever (1), and two slots (103) corresponding to the two latches (501) are provided on one end of the reversing lever (1) facing the wear-resistant metal sheet (5). The wear-resistant metal sheet (501) is plug-connected to the reversing lever (1) via the two latches (501).

3. The adjustment mechanism of the reversing switch according to claim 1, characterized in that: A spring plug (7) is provided at one end of the spring (4) facing away from the positioning steel ball (2), a spring hole (8) for inserting the spring (4) is provided on the housing (3) of the reversing switch, a plug hole (9) with a diameter larger than that of the spring hole (8) is coaxially provided at one end of the spring hole (8) away from the reversing handle (1), the plug hole (9) forms an opening on the housing (3), the spring plug (7) is inserted into the housing (3) and embedded in the plug hole (9), thereby enclosing the spring (4) in the spring hole (8).

4. The adjustment mechanism of the reversing switch according to claim 3, characterized in that: A circumferentially extending annular groove (10) is provided on the inner wall of the plug hole (9), and an annular clamping strip (11) adapted to the annular groove (10) is provided on the outer circumferential surface of the spring plug (7). After the spring plug (7) is inserted into the plug hole (9), the annular clamping strip (11) is clamped into the annular groove (10) so that the spring plug (7) cannot exit the plug hole (9).

5. The adjustment mechanism of the reversing switch according to claim 3, characterized in that: Most of the positioning steel ball (2) is embedded in the spring hole (8), and the wear-resistant metal sheet (5) follows the reversing handle (1) to swing back and forth at the mouth of the spring hole (8) to switch between different grooves (6) and cooperate with the positioning steel ball (2).

6. The adjustment mechanism of the reversing switch according to claim 1, characterized in that: One end of the reversing handle (1) close to the wear-resistant metal sheet (5) is vertically connected to a rocker rod (104), and the rocker rod (104) is used to connect to the reversing slider (12) in the switch to drive the reversing slider (12) to slide.

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