An interference apparatus is provided for a motor shaft transmission assembly. The interference apparatus may include split-ring shells and a retaining device. The interference apparatus may be mounted to an intermediate sleeve of the motor shaft transmission assembly. The interference apparatus is configured to prevent the loss of certain motor shaft transmission assembly components downhole in the event of a failure of the motor transmission due to dynamic loads.

A connection arrangement for axially securing a shaft-hub connection includes a shaft and a hub with an inner stop surface for the shaft and an outer groove for axially positioning a securing device. The securing device has an axially extending sleeve-shaped part and a radial collar. The sleeve-shaped part at least partly surrounds the circumference of the hub, and the radial collar at least partly engages behind the annular end surface of the hub. The inner stop surface for the shaft in the housing is formed by a recess. The securing device includes a radially deformable holding socket, the axially extending sleeve-shaped part of which is surrounded by a tensioning strap. The holding socket region which is offset radially inwards surrounds the expanded outer groove of the hub coaxially in the assembled state of the shaft-hub connection and can be locked in the expanded outer groove of the hub by the tensioning strap, the radial collar of the holding socket resting against the axial securing ring of the shaft in the locked state.

A connector arrangement for interconnecting a first component 12 and a second component 14, the connector arrangement having a connector member 16 including a first abutment face 20a shaped to cooperate with a face of the first component 12, the first abutment face 20a being provided with a series of spline teeth formations 18a, the dimensions of the first abutment face 20a being selected relative to the first component 12 such that the spline teeth formations 18a thereof dig into the material thereof, the connector member 16 further having a second abutment face 20b shaped to cooperate with a face of the second component 14, the second abutment face 20b also being provided with a series of spline teeth formations 18b, the dimensions of the second abutment face 20b being selected relative to the second component 14 such that the spline teeth formations 18b thereof dig into the material of the second component 14.

An interference fit connection for a shaft comprises a hub having a conical through opening and a reduction sleeve having a cylindrical through opening for arrangement on the shaft and a conical outer circumference, where the cone angle of the conical outer circumference corresponds to the cone angle of the corresponding conical through opening of the hub. The hub is a two-component part having a first component made of steel and a second component made of fiber-reinforced plastics material. The second component made of fiber-reinforced plastics material is designed as a ring which is arranged on the outer circumference of a sleeve portion of the first component, which sleeve portion surrounds the reduction sleeve, so as to surround this sleeve portion. The fiber-reinforced plastics material has a higher modulus of elasticity than the steel of the first component.

A method of securing a yoke to a clutch includes arranging a circlip in a circumferential channel in an outer surface of a tool and inserting the tool inside a bore in the clutch. Legs arranged in the channel extend to expand the circlip to an expanded state to arrange the circlip outside of the channel in a circumferential groove in the bore. A spacer is snapped onto a portion of the clutch and arranged between two ends of the circlip to secure the circlip in the expanded state. The tool is then removed from the bore, and a yoke is inserted into the bore. The spacer is then removed from the bore allowing the circlip to contract such that the spacer partially occupies both the groove and a circumferential depression in the yoke. This secures the yoke to the clutch.

An interference apparatus is provided for a motor shaft transmission assembly. The interference apparatus may include split-ring shells and a retaining device. The interference apparatus may be mounted to an intermediate sleeve of the motor shaft transmission assembly. The interference apparatus is configured to prevent the loss of certain motor shaft transmission assembly components downhole in the event of a failure of the motor transmission due to dynamic loads.

An assembly method in which an assembly ring is force-fitted between a first part and a second part such as to create: a tightening contact between the first part and the inner face of the ring, by means of plastic deformation of the ring, said tightening contact occupying a first interference zone; and a tightening contact between the second part and the outer face of the ring, said tightening contact occupying a second interference zone. The assembly ring comprises a first ring segment (T1) and a second ring segment (T2) which are stepped axially in relation to one another and which have different radial dimensions from one another, such as to confine the first interference zone to the first ring segment (T1) and the second interference zone to the second ring segment (T2), in order to prevent the first interference zone and the second interference zone from overlapping axially.

A method of securing a yoke to a clutch includes arranging a circlip in a circumferential channel in an outer surface of a tool and inserting the tool inside a bore in the clutch. Legs arranged in the channel extend to expand the circlip to an expanded state to arrange the circlip outside of the channel in a circumferential groove in the bore. A spacer is snapped onto a portion of the clutch and arranged between two ends of the circlip to secure the circlip in the expanded state. The tool is then removed from the bore, and a yoke is inserted into the bore. The spacer is then removed from the bore allowing the circlip to contract such that the spacer partially occupies both the groove and a circumferential depression in the yoke. This secures the yoke to the clutch.

A mounting device connects a rotary shaft to a rotatable machine element. The mounting device includes an inner sleeve for clamping onto the shaft and an outer sleeve for clamping onto the machine element. The inner and outer sleeves have cooperating tapered surfaces for tightening the mounting device. The cooperating tapered surfaces include striations. A nut connected with the inner and outer sleeves is rotatable to drive the inner sleeve relative to the outer sleeve in a first direction to tighten the inner sleeve onto the shaft and the outer sleeve onto the machine element.

A connection arrangement for axially securing a shaft-hub connection includes a shaft, a hub, and a securing device. The hub has an inner stop surface for the shaft formed by a recess and has an outer groove for axially positioning the securing device. The securing device has an axially extending sleeve-shaped part at least partly surrounding the circumference of the hub and has a radial collar at least partly engaging behind the annular end surface of the hub. The sleeve-shaped part is surrounded by a tensioning strap. A holding socket region offset radially inwards surrounds the expanded outer groove of the hub coaxially in the assembled state and can be locked in the expanded outer groove of the hub by the tensioning strap. The radial collar of the holding socket rests against an axial securing ring of the shaft in the locked state.