A joint for a cutting tool includes a bolt with a head in a first end, with a thread in a second end, and with an intermediate section between the first end and the second end, which during attachment of two objects rotatably to each other protrudes trough openings in said objects. A nut is received on the thread. In order to provide an easy solution for adjusting the tension of the joint and at the same time preventing accidental loosening of the joint, the bolt is provided with a cavity. An expansion bolt with a threaded end protrudes into the cavity and expands the second end of the bolt.

A system includes a pair of gearboxes each having an output shaft. A first adapter is connected to the output shaft of the first gearbox, and a second adapter is connected to the output shaft of the second gearbox. A first drive shaft is connected to the first adapter, and a second drive shaft is connected to the second adapter. Each drive shaft may articulate with respect to an axis defined by its associated output shaft through an angle of at least twenty degrees.

A wiper connector arranged to a bolt-type wiper arm includes a sleeve tube, a fastening member and a tube body. The sleeve tube has a tube body, a first and a second flange. The first flange defines a receiving compartment therein. The fastening member has a circular ring body and a plurality of abutting portions, and is fixed within the receiving compartment of the sleeve tube. The bolt is inserted into the fastening member. The circumferential portion of the bolt is tightly engaged by the plurality of abutting portions. The base has a clutching trough, a first and a second restricting trough. The first and the second flanges of the sleeve tube are received respectively in the first and the second restricting troughs, and the tube body is secured in the clutching trough. The instant disclosure further provides a bolt-stabilizing sleeve adaptor.

A system includes a pair of gearboxes each having an output shaft. A first adapter is connected to the output shaft of the first gearbox, and a second adapter is connected to the output shaft of the second gearbox. A first drive shaft is connected to the first adapter, and a second drive shaft is connected to the second adapter. Each drive shaft may articulate with respect to an axis defined by its associated output shaft through an angle of at least twenty degrees.

A wiper connector arranged to a bolt-type wiper arm includes a sleeve tube, a fastening member and a tube body. The sleeve tube has a tube body, a first and a second flange. The first flange defines a receiving compartment therein. The fastening member has a circular ring body and a plurality of abutting portions, and is fixed within the receiving compartment of the sleeve tube. The bolt is inserted into the fastening member. The circumferential portion of the bolt is tightly engaged by the plurality of abutting portions. The base has a clutching trough, a first and a second restricting trough. The first and the second flanges of the sleeve tube are received respectively in the first and the second restricting troughs, and the tube body is secured in the clutching trough. The instant disclosure further provides a bolt-stabilizing sleeve adaptor.

A wiper connector arranged to a bolt-type wiper arm, comprising a sleeve tube, a fastening member and a tube body, wherein the sleeve tube has a tube body, a first and a second flange, where the first flange defines a receiving compartment therein; the fastening member has a circular ring body and a plurality of abutting portions, the fastening member is fixed within the receiving compartment of the sleeve tube, the bolt is inserted into the fastening member, the circumferential portion of the bolt is tightly engaged by the plurality of abutting portions; the base has a clutching trough, a first and a second restricting trough, where the first and the second flanges of the sleeve tube are received respectively in the first and the second restricting troughs, and the tube body is secured in the clutching trough. The instant disclosure further provides a bolt-stabilizing sleeve adaptor.