A sealing apparatus for a robot, the sealing apparatus comprising: a first enclosure; a second enclosure rotatably connected to the first enclosure, wherein the first enclosure and the second enclosure cooperatively define a gap between the first enclosure and the second enclosure; a seal disposed in the gap, wherein the seal and the second enclosure cooperatively define a chamber; and an elastomer disposed in the chamber, wherein the elastomer is compressed by the seal and the second enclosure, generating an elastic force that presses the seal against the first enclosure, wherein the first enclosure comprises a first body and a first protrusion extending from the first body towards the second enclosure, the second enclosure comprises a second body and a second protrusion, the second protrusion extends from the second body towards the first enclosure and is spaced apart from the first protrusion such that the gap is formed, and the seal comprises a main body, a first end, and a second end, the first end of the seal protrudes from the main body towards the first enclosure and matches the first protrusion, the second end of the seal protrudes from the main body towards the second enclosure, and the second end of the seal and the second protrusion cooperatively define the chamber, characterised in that: the second end (33a, 33c) of the seal defines a second annular recess (331a, 331c) extending along a circumference of the seal; and the second protrusion (22a, 22c) extends along a circumference of the second enclosure, wherein at least a portion of the second protrusion (22a, 22c) is located within the second annular recess (331a, 331c), wherein the second end (33a, 33c) of the seal abuts the second body (21a, 21c) of the second enclosure, and wherein the second protrusion (22a, 22c) is spaced apart from a bottom wall of the second annular recess such that the chamber is formed between the bottom wall of the second annular recess (331a, 331c) and the second protrusion (22a, 22c). a first enclosure; a second enclosure rotatably connected to the first enclosure, wherein the first enclosure and the second enclosure cooperatively define a gap between the first enclosure and the second enclosure; a seal disposed in the gap, wherein the seal and the second enclosure cooperatively define a chamber; and an elastomer disposed in the chamber, wherein the elastomer is compressed by the seal and the second enclosure, generating an elastic force that presses the seal against the first enclosure, wherein the first enclosure comprises a first body and a first protrusion extending from the first body towards the second enclosure, the second enclosure comprises a second body and a second protrusion, the second protrusion extends from the second body towards the first enclosure and is spaced apart from the first protrusion such that the gap is formed, and the seal comprises a main body, a first end, and a second end, the first end of the seal protrudes from the main body towards the first enclosure and matches the first protrusion, the second end of the seal protrudes from the main body towards the second enclosure, and the second end of the seal and the second protrusion cooperatively define the chamber, characterised in that: the second end (33a, 33c) of the seal defines a second annular recess (331a, 331c) extending along a circumference of the seal; and the second protrusion (22a, 22c) extends along a circumference of the second enclosure, wherein at least a portion of the second protrusion (22a, 22c) is located within the second annular recess (331a, 331c), wherein the second end (33a, 33c) of the seal abuts the second body (21a, 21c) of the second enclosure, and wherein the second protrusion (22a, 22c) is spaced apart from a bottom wall of the second annular recess such that the chamber is formed between the bottom wall of the second annular recess (331a, 331c) and the second protrusion (22a, 22c). the second end (33a, 33c) of the seal defines a second annular recess (331a, 331c) extending along a circumference of the seal; and the second protrusion (22a, 22c) extends along a circumference of the second enclosure, wherein at least a portion of the second protrusion (22a, 22c) is located within the second annular recess (331a, 331c), wherein the second end (33a, 33c) of the seal abuts the second body (21a, 21c) of the second enclosure, and wherein the second protrusion (22a, 22c) is spaced apart from a bottom wall of the second annular recess such that the chamber is formed between the bottom wall of the second annular recess (331a, 331c) and the second protrusion (22a, 22c).