Abstract: A differential assembly includes a differential unit, an electromagnetic valve and an differential locking apparatus including an engaging ring. The differential unit includes a first side gear, a second side gear, and a planet gear engaging with the first side gear and the second side gear. The electromagnetic valve is operated between a first state and a second state. In the first state, the electromagnetic valve is switched to drive the engaging ring to engage with the first side gear, such that the planet gear remains stationary while the first and second side gears are driven to rotate in approximately the same speed. In the second state, the electromagnetic valve is switched to drive the engaging ring to disengage from the first side gear, such that the planet gear can be driven to rotate for driving the first and the second side gears to rotate in different speeds.

Abstract: The invention relates to the technical field of illumination lamps, in particular to an LED bulb. The invention comprises a lamp cap, a lampshade, LEDS and a circuit board, wherein the bottom end of the lampshade is mounted and fixed at the top end of the lamp cap; the circuit board is mounted and fixed in the lampshade and also electrically connected with the lamp cap; and the lampshade is filled with a mixed gas which transfers heat produced by the LEDS outside the bulb. The invention transfers heat produced by the LEDS by a mixed gas; the LED bulb has such advantages to as small weight, small volume and low production cost; besides, by using the mixed gas as heat transfer medium, the invention can radiate heat produced by the LEDS outside the bulb rapidly so as to effectively solve the heat radiation issue of the LEDS and prolong the service life of the LEDS.

Abstract: The invention relates to the technical field of illumination lamps, in particular to an LED bulb. The invention comprises a lamp cap, a lampshade, LEDS and a circuit board, wherein the bottom end of the lampshade is mounted and fixed at the top end of the lamp cap; the circuit board is mounted and fixed in the lampshade and also electrically connected with the lamp cap; and the lampshade is filled with a mixed gas which transfers heat produced by the LEDS outside the bulb. The invention transfers heat produced by the LEDS by a mixed gas; the LED bulb has such advantages to as small weight, small volume and low production cost; besides, by using the mixed gas as heat transfer medium, the invention can radiate heat produced by the LEDS outside the bulb rapidly so as to effectively solve the heat radiation issue of the LEDS and prolong the service life of the LEDS.