Abstract: A speed reducer and a robot are disclosed. The speed reducer includes a rigid wheel, a flexible wheel and a flexible bearing; the rigid wheel is provided with a first fitting position and an inner wheel tooth set; the outer peripheral surface of a peripheral wall of the flexible wheel is provided with an outer wheel tooth set; in the axial direction of the rigid wheel, the tooth top of the outer wheel tooth set is provided with a first length, and the tooth root of the outer wheel tooth set is provided with a second length; the tooth top of the inner wheel tooth set is provided with a third length; the flexible bearing is provided with a fourth length; the second length and the third length are both greater than the first length, and the fourth length is greater than the second length.

Abstract: A speed reducer and a robot are disclosed. The speed reducer includes a rigid wheel, a flexible wheel and a flexible bearing; the rigid wheel is provided with a first fitting position and an inner wheel tooth set; the outer peripheral surface of a peripheral wall of the flexible wheel is provided with an outer wheel tooth set; in the axial direction of the rigid wheel, the tooth top of the outer wheel tooth set is provided with a first length, and the tooth root of the outer wheel tooth set is provided with a second length; the tooth top of the inner wheel tooth set is provided with a third length; the flexible bearing is provided with a fourth length; the second length and the third length are both greater than the first length, and the fourth length is greater than the second length.

Abstract: Provided is a linear compressor comprising a cylinder, a piston, a cylinder shell, a linear motor stator, a magnetic levitation bearing and a mover. One end of the cylinder shell is sleeved on the cylinder, and another end of the cylinder shell is provided with a mounting cavity communicating with the cylinder cavity. A cavity wall of the mounting cavity is respectively provided with a stator mounting groove and a protrusion in a circumferential direction thereof. The linear motor stator is mounted in the stator mounting groove. The magnetic levitation bearing is disposed on the cavity wall of the mounting cavity. The mover includes a mover rod and a magnetic member disposed on the mover rod, and the mover rod is connected with the piston. The use of magnetic levitation bearing can avoid mechanical friction caused by direct contact of the mover with the linear motor stator.

Abstract: Provided is a linear compressor comprising a cylinder, a piston, a cylinder shell, a linear motor stator, a magnetic levitation bearing and a rotor. One end of the cylinder shell is sleeved on the cylinder, and another end of the cylinder shell is provided with a mounting cavity communicating with the cylinder cavity. A cavity wall of the mounting cavity is respectively provided with a stator mounting groove and a protrusion in a circumferential direction thereof. The linear motor stator is mounted in the stator mounting groove. The magnetic levitation bearing is disposed on the cavity wall of the mounting cavity. The rotor comprises a rotor bracket and a magnetic member disposed on the rotor bracket; the rotor bracket is connected with the piston. The use of magnetic levitation bearing can avoid mechanical friction caused by direct contact of the rotor with the linear motor stator.

Abstract: A leaf spring (100) comprises at least two spring arms (120, 130) and an inner fixing hole (110). The at least two spring arms (120, 130) are evenly distributed around a center of the inner fixing hole (110); each spring arm is of the same structure, and an outer fixing hole (122) is disposed at an outermost end of each spring arm. Further provided are a leaf spring group and a compressor. The leaf spring group comprises multiple leaf springs, and the compressor comprises the leaf spring group. The provided leaf spring has a structure of multiple concentric circular arms or a structure of concentric vortex arms, and the leaf spring has smaller equivalent mass, so that the rigidity and inherent frequency requirements can be met without the need of increasing the mass of the components, thereby reducing the product mass and saving the cost.

Abstract: A leaf spring (100) comprises at least two spring arms (120, 130) and an inner fixing hole (110). The at least two spring arms (120, 130) are evenly distributed around a center of the inner fixing hole (110); each spring arm is of the same structure, and an outer fixing hole (122) is disposed at an outermost end of each spring arm. Further provided are a leaf spring group and a compressor. The leaf spring group comprises multiple leaf springs, and the compressor comprises the leaf spring group. The provided leaf spring has a structure of multiple concentric circular arms or a structure of concentric vortex arms, and the leaf spring has smaller equivalent mass, so that the rigidity and inherent frequency requirements can be met without the need of increasing the mass of the components, thereby reducing the product mass and saving the cost.