Electric hair cutter with double eccentric shafts

Abstract

A support is fixedly connected with a motor, the motor drives a driving bevel gear to rotate, the driving bevel gear drives a driven bevel gear to rotate clockwise, the driven bevel gear is connected with the support in a rotating mode, and an upper blade eccentric shaft and a lower blade eccentric shaft are installed at the upper end and the lower end of the driven bevel gear respectively. When the driven bevel gear rotates, an eccentric ring generated by the upper blade eccentric shaft and an eccentric ring generated by the lower blade eccentric shaft always keep left-right balanced reciprocating motion in opposite directions, and the upper blade eccentric shaft and the lower blade eccentric shaft are driven by the driven bevel gear to rotate. The upper blade eccentric shaft and the lower blade eccentric shaft respectively drive the upper blade frame and the lower blade frame to perform left-right balanced reciprocating rectilinear motion in opposite directions along the guide rail through the blade frame slots, so that the shearing motion effect is formed, and the same shearing effect can be achieved as the rotating speed of the double eccentric shafts is only half of the rotating speed of the single eccentric shaft. Therefore, vibration is small and noise is low in the working process.

Description

Technical Field

[0001] The utility model relates to an electric hair clipper, in particular to an eccentric shaft electric hair clipper. Background Art

[0002] In the existing eccentric shaft electric hair clipper, a single eccentric shaft installed on a motor is matched with a slot on the upper blade holder. When the motor operates, an eccentric circle is generated. The eccentric circle makes the upper blade produce a reciprocating motion with left - right balance through the slot on the upper blade holder, so as to achieve the shearing effect. In this kind of single - eccentric - shaft electric hair clipper, during the working process, under the action of centrifugal force, the eccentric shaft generates relatively large vibration and high noise. Summary of the Invention

[0003] In order to overcome the defects of large vibration and high noise of the single eccentric shaft, the utility model provides a double eccentric shaft with the center of the driven bevel gear as the symmetric center. The double eccentric shaft is simultaneously matched with the fixed slots of the upper blade holder and the fixed slots of the lower blade holder. When the double eccentric shaft rotates, two eccentric circles in opposite directions are generated. The eccentric circles make the upper and lower blades respectively produce left - right balanced reciprocating linear motions with equal eccentric distances and opposite motion directions under the action of the upper and lower eccentric shafts. Since the rotational speed of the double eccentric shaft only needs to be half of the rotational speed of the single eccentric shaft to achieve the same shearing effect, the vibration is small and the noise is low during the working process.

[0004] The technical solution adopted to solve its technical problems is as follows: A double - eccentric - shaft electric hair clipper includes a bracket fixedly connected to a motor. The motor drives a driving bevel gear to rotate through a motor shaft. The driving bevel gear drives a driven bevel gear to rotate clockwise. The driven bevel gear is rotatably connected to the middle position of the bracket. An upper - blade eccentric shaft and a lower - blade eccentric shaft are respectively installed above and below the driven bevel gear, and the axis of the upper - blade eccentric shaft and the axis of the lower - blade eccentric shaft are symmetric with the axis of the driven bevel gear as the symmetric center. When the driven bevel gear rotates, the eccentric circles generated by the upper - blade eccentric shaft and the lower - blade eccentric shaft always maintain left - right balanced reciprocating motions in opposite directions. The upper blade holder and the lower blade holder are slidably connected to the bracket through blade compression springs. The upper - blade eccentric shaft and the lower - blade eccentric shaft respectively drive the upper blade holder and the lower blade holder to make left - right balanced reciprocating linear motions in opposite directions along the guide rails through the slots on the blade holders.

[0005] Advantageous Effects: The rotational speed of the double eccentric shaft only needs to be half of the rotational speed of the single eccentric shaft to achieve the same shearing effect. Therefore, the vibration is small and the noise is low during the working process.

[0006] Description of the Drawings: Figure 1 It is a schematic diagram of the present utility model (front view of the double - eccentric - shaft electric hair clipper); Figure 2Left view of a double eccentric shaft electric hair clipper; in the figure, 1. motor shaft, 2. driving bevel gear, 3. driven bevel gear, 4. blade compression spring, 5. upper blade eccentric shaft, 6. lower blade eccentric shaft, 7. guide rail of the bracket and the blade holder, 8. upper blade holder, 9. lower blade holder, 10. bracket, 11. slot on the blade holder.

[0007] Specific implementation method: The bracket 10 is fixedly connected to the motor. When the motor rotates, it drives the driving bevel gear 2 to rotate through the motor shaft 1. The rotation of the driving bevel gear 2 drives the driven bevel gear 3 to rotate clockwise. The driven bevel gear 3 is rotatably connected to the bracket 10. As Figure 2 shown: The upper blade eccentric shaft 5 and the lower blade eccentric shaft 6 are respectively fixedly installed at the upper and lower ends of the driven bevel gear 3. As Figure 1 shown: The axis of the upper blade eccentric shaft 5 and the axis of the lower blade eccentric shaft 6 are symmetric about the axis of the driven bevel gear 3 as the center of symmetry. When the driven bevel gear 3 rotates, the eccentric circles generated by the upper blade eccentric shaft 5 and the lower blade eccentric shaft 6 always maintain a left-right balanced reciprocating motion in opposite directions. The upper blade holder 8 and the lower blade holder 9 are slidably connected to the bracket 10 through the blade compression spring 4. The upper blade eccentric shaft 5 and the lower blade eccentric shaft 6 respectively drive the upper blade holder 8 and the lower blade holder 9 to perform a left-right balanced reciprocating linear motion in opposite directions along the guide rail 7. As Figure 1 shown: During the process of the driven bevel gear 3 rotating clockwise for one week, the eccentric circle generated by the upper blade eccentric shaft 5 first rotates from right to left and then from left to right, and the eccentric circle generated by the lower blade eccentric shaft 6 first rotates from left to right and then from right to left. The slots on the upper blade holder and the lower blade holder convert the rotational motion of the eccentric shaft into a left-right balanced reciprocating linear motion of the upper blade holder 8 and the lower blade holder 9 along the guide rail 7 in opposite directions of motion, thus forming a shearing motion effect.

Claims

1. A double eccentric shaft electric hair clipper, characterized in that: The bracket (10) is fixedly connected to the motor. The rotation of the motor drives the driving bevel gear (2) to rotate through the motor shaft (1). The rotation of the driving bevel gear (2) drives the driven bevel gear (3) to rotate clockwise. The driven bevel gear (3) is rotatably connected to the bracket (10). The upper and lower ends of the driven bevel gear (3) are respectively fixedly installed with the upper blade eccentric shaft (5) and the lower blade eccentric shaft (6), and the upper blade eccentric shaft (5) and the lower blade eccentric shaft (6) are symmetric with the axis of the driven bevel gear (3) as the center of symmetry. When the driven bevel gear (3) rotates, the eccentric circles generated by the upper blade eccentric shaft (5) and the lower blade eccentric shaft (6) always maintain a left-right balanced reciprocating motion in opposite directions. The upper blade holder (8) and the lower blade holder (9) are slidably connected to the bracket (10) through the blade compression spring (4). The upper blade eccentric shaft (5) and the lower blade eccentric shaft (6) respectively drive the upper blade holder (8) and the lower blade holder (9) to perform a left-right balanced reciprocating linear motion in opposite directions along the guide rail (7) through the slotted blade holders (11), thereby forming a shearing motion effect.

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