A function switching mechanism for electric hammer

Abstract

The present invention discloses an electric hammer function switching mechanism, including a paddle, one end of which can be connected with the drill clutch and the hammer clutch; a lever, one end of which is connected to the other end of the paddle, and the lever is elastic; a stop pin, one end of which is connected to the other end of the lever, and the other end of which is connected to the release plate; and a function knob, which acts on the lever through a function knob pin eccentrically arranged on the function knob. The electric hammer function switching mechanism provided by the present invention realizes convenient function switching operation, improves the use range of the machine, and reduces costs.

Description

Technical Field

[0001] The invention relates to an electric tool, in particular to a function switching mechanism for an electric hammer. Background Art

[0002] As a common handheld power tool, electric hammer has been widely used in industrial production and interior decoration. According to different working environments (1. On relatively soft materials such as wood, no impact function is needed, only drilling function is needed; 2. When drilling holes in hard objects such as concrete, both impact and drilling functions are required; 3. For simple decoration grooving and chiseling areas, only chiseling function is required), it is necessary to perform function conversion of each gear to achieve one-machine-one-twist multi-function switching to increase its application range. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a function switching mechanism for an electric hammer, which can realize convenient function switching operation, improve the use range of the machine and reduce costs.

[0004] In order to solve the above technical problems, the present invention adopts an electric hammer function switching mechanism, wherein the electric hammer includes a bracket, a release plate located on the bracket, an intermediate shaft and a pinion installed on the intermediate shaft, a drill gear clutch, a hammer gear clutch and a rocker bearing, and the electric hammer function switching mechanism includes a paddle, one end of the paddle can be matched with the drill gear clutch and the hammer gear clutch, and the paddle is provided with a switching groove along the axial direction; it also includes a lever, one end of the lever is connected to the other end of the paddle, and the lever is elastic; it also includes a stop pin, one end of the stop pin is connected to the other end of the lever, and the other end of the stop pin is matched with the release plate; it also includes a function knob, and the function knob acts in the switching groove on the paddle through a function knob pin eccentrically arranged on the function knob.

[0005] According to one aspect of the present invention, a switching groove cooperating with the function knob pin is provided on the paddle, and the switching groove is arranged along the axial direction.

[0006] According to one aspect of the present invention, a first boss and a second boss are provided on one end of the paddle that cooperates with the lever, a fixing hole that can circumferentially fix the lever is provided on the second boss, a limiting groove is provided on the first boss, an opening direction of the limiting groove is perpendicular to the switching groove, and the limiting groove accommodates the lever therein.

[0007] According to one aspect of the present invention, a clamping groove cooperating with the stop pin is provided on the end surface of the release plate, and the clamping grooves are arranged at equal intervals along the circumferential direction.

[0008] According to one aspect of the present invention, the function knob in the electric hammer function switching mechanism has at least four positions, so that the electric hammer can be switched to realize four working states.

[0009] According to one aspect of the present invention, when the function knob is located at the first position, the hammer clutch engages with the rocker bearing, while the drill clutch disengages from the pinion gear, and the stop pin cooperates with the release plate.

[0010] According to one aspect of the present invention, the stop pin does not enter the slot of the trip plate, the lever is bent, and the stop pin can automatically fall into the slot as the electric hammer operates.

[0011] According to one aspect of the present invention, when the function knob is located at the second position, the hammer clutch engages with the rocker bearing, while the drill clutch disengages from the pinion gear and the stop pin disengages from the release plate.

[0012] According to one aspect of the present invention, when the function knob is located at the third position, the hammer clutch is engaged with the rocker bearing, while the drill clutch is engaged with the pinion gear, and the stop pin is disengaged from the release plate.

[0013] According to one aspect of the present invention, when the function knob is located at the fourth position, the hammer clutch disengages from the rocker bearing, while the drill clutch engages with the pinion gear, and the stop pin disengages from the release plate.

[0014] The specific technical solutions and beneficial effects of the present invention will be described in detail in the following specific embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] Figure 1 This is an explosion diagram of an electric hammer function switching mechanism of the present invention.

[0017] Figure 2 This is a structural schematic diagram of an electric hammer function switching mechanism of the present invention when it is in the first position.

[0018] Figure 3 It is a structural schematic diagram of an electric hammer function switching mechanism of the present invention when the stop pin is not inserted into the release plate when the electric hammer function switching mechanism is in the first position.

[0019] Figure 4 This is a structural schematic diagram of an electric hammer function switching mechanism of the present invention when it is in the second position.

[0020] Figure 5 This is a structural schematic diagram of an electric hammer function switching mechanism of the present invention when it is located in the third position.

[0021] Figure 6 This is a structural schematic diagram of an electric hammer function switching mechanism of the present invention when it is in the fourth position.

[0022] Figure 7 It is a partially enlarged schematic diagram of a paddle in a function switching mechanism of an electric hammer of the present invention. DETAILED DESCRIPTION

[0023] 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 described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] Those skilled in the art will appreciate that, in the absence of conflict, the features in the following embodiments and implementations may be combined with each other.

[0025] The terms used in the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. For example, the words "upper", "lower", "front", "back" and the like indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0026] refer to Figures 1 to 7 As shown, the electric hammer provided by the present invention includes a bracket 11 and a release plate 10 installed on the bracket 11. It also includes an intermediate shaft 5 and a pinion 3 installed on the intermediate shaft 5, a drill gear clutch 4, a hammer gear clutch 6 and a rocker bearing 7, and is arranged in the order from the output shaft end to the direction of the motor. Among them, the release plate 10 is provided with a slot 22 on the end face close to the electric hammer motor, and the present invention preferably arranges the slot 22 at equal intervals along the circumferential direction.

[0027] The electric hammer provided by the present invention also includes an electric hammer function switching mechanism, including a function knob 16, and the function knob 16 is eccentrically provided with a function knob pin 15 on a side away from the operating surface. It also includes a paddle 14, and a switching groove 21 is provided on the paddle 14 to cooperate with the function knob pin, and the direction of the switching groove 21 is set along the axial direction. It also includes a lever 13, and this embodiment preferably uses an elastic lever.

[0028] One end of the paddle 14 is connected to the drill clutch 4 and the hammer clutch 6, and the other end of the paddle 14 is provided with a first boss 17 and a second boss 20, wherein the second boss 20 is provided with a fixing hole 19 that can circumferentially fix the paddle rod, and the first boss 17 is provided with a limiting groove 18, the opening direction of the limiting groove 18 is perpendicular to the switching groove 21, and the limiting groove 18 accommodates the paddle rod 13 therein.

[0029] The electric hammer function switching mechanism also includes a stop pin 12 , one end of which is provided with a through hole, in which the lever 13 can be installed, and the other end of the stop pin 12 can be matched and connected with a slot 22 on the trip plate 10 .

[0030] Rotate the function knob, and the function rotating pin inserted into the switching slot drives the lever to move along the axial direction, switching the matching relationship between the paddle and the drill clutch and the hammer clutch, while driving the lever to move and change the connection relationship between the stop pin and the release plate. Therefore, the function knob can be rotated to at least four positions, and the electric hammer can be switched to realize at least four working states. When the function knob is rotated to the first position, the hammer clutch is combined with the rocker bearing, and the drill clutch is disengaged from the pinion gear, and the stop pin cooperates with the release plate. If the stop pin enters the release plate slot, it cooperates with the release plate slot, and the electric hammer function is realized; if the stop pin does not enter the release plate slot, the elastic lever bends at this time, and the stop pin can automatically fall into the slot as the electric hammer runs, and the electric hammer function is realized.

[0031] When the function knob is in the second position, the hammer gear clutch is engaged with the rocker bearing, the drill gear clutch is disengaged from the pinion, and the stop pin is disengaged from the release plate, and the hammer gear drill bit angle is adjusted. When the function knob is rotated to the third position, the hammer gear clutch is engaged with the rocker bearing, the drill gear clutch is disengaged from the pinion, and the stop pin is disengaged from the release plate, and the hammer drill gear is in the fourth position. The hammer gear clutch is disengaged from the rocker bearing, the drill gear clutch is engaged with the pinion, and the stop pin is disengaged from the release plate, and the drill gear is in the fourth position.

[0032] Therefore, the electric hammer function switching mechanism provided by the present invention can realize convenient function switching operation, improve the use range of the machine, and reduce costs.

[0033] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A function switching mechanism for an electric hammer, wherein: The electric hammer includes a bracket, a release plate located on the bracket, an intermediate shaft and a pinion installed on the intermediate shaft, a drill gear clutch, a hammer gear clutch and a rocker bearing, and is characterized in that: the electric hammer function switching mechanism includes a paddle, one end of the paddle can be matched with the drill gear clutch and the hammer gear clutch, and the paddle is provided with a switching groove along the axial direction; it also includes a lever, one end of which is connected to the other end of the paddle, and the lever is elastic; it also includes a stop pin, one end of which is connected to the other end of the lever, and the other end of the stop pin is matched with the release plate; it also includes a function knob, and the function knob acts in the switching groove on the paddle through a function knob pin eccentrically arranged on the function knob.

2. The electric hammer function switching mechanism according to claim 1, characterized in that: A first boss and a second boss are provided at one end of the paddle that cooperates with the lever, a fixing hole that can circumferentially fix the lever is provided on the second boss, a limiting groove is provided on the first boss, an opening direction of the limiting groove is perpendicular to the switching groove, and the limiting groove accommodates the lever therein.

3. The function switching mechanism of an electric hammer according to claim 2, characterized in that: A clamping groove cooperating with the stop pin is provided on the end surface of the release plate, and the clamping grooves are arranged at equal intervals along the circumferential direction.

4. The electric hammer function switching mechanism according to claim 3, characterized in that: The function knob in the electric hammer function switching mechanism has at least four positions, which can switch the electric hammer to realize four working states.

5. The electric hammer function switching mechanism according to claim 4, characterized in that: When the function knob is located at the first position, the hammer clutch is engaged with the rocker bearing, while the drill clutch is disengaged from the pinion gear, and the stop pin is engaged with the release plate.

6. The electric hammer function switching mechanism according to claim 5, characterized in that: The stop pin does not enter the slot of the release plate, the shift rod is bent, and the stop pin can automatically fall into the slot as the electric hammer runs.

7. The electric hammer function switching mechanism according to claim 4, characterized in that: When the function knob is located at the second position, the hammer clutch engages with the rocker bearing, while the drill clutch disengages from the pinion gear and the stop pin disengages from the release plate.

8. The electric hammer function switching mechanism according to claim 4, characterized in that: When the function knob is located at the third position, the hammer clutch is engaged with the rocker bearing, while the drill clutch is engaged with the pinion, and the stop pin is disengaged from the release plate.

9. The electric hammer function switching mechanism according to claim 4, characterized in that: When the function knob is located at the fourth position, the hammer clutch disengages from the rocker bearing, while the drill clutch engages with the pinion, and the stop pin disengages from the release plate.

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