A biopsy system driver includes a motor having a rotatable output shaft, a support structure, a drive shaft, an elongate lead screw and a biopsy instrument drive member. The drive shaft is rotatably coupled to the support structure and includes or is otherwise operatively connected to the motor output shaft such that activation of the motor rotates the drive shaft. The elongate lead screw is coupled to the drive shaft such that rotation of the drive shaft rotates the lead screw about an axis of the lead screw. The lead screw is axially translatable relative to the drive shaft and to the support structure. The biopsy instrument drive member is threadably coupled to the lead screw such that rotation of the lead screw causes axial translation of one of the lead screw and biopsy instrument drive member relative to the other one and to the support structure.

In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.

In a ball screw apparatus, a ball train including a plurality of main balls is housed in a raceway between a ball track of a ball nut and a ball track of a ball screw shaft. A coil spring housed in the raceway includes a first end that engages with an end of the ball train and a second end supported by a stopper (a first recessed portion, a protruding portion, or the like) of the ball nut. A stopper ball having a diameter larger than the diameter of the main ball is interposed between the stopper and the second end of the coil spring.

A high-load linear actuator includes a driving mechanism, a worm shaft, a worm wheel assembly, a lead screw, a telescopic pipe and an outer pipe. The driving mechanism includes a base and a motor. The base has a supporting portion and an accommodating portion. The motor is fixed to the supporting portion. The worm shaft extends from the motor into the supporting portion. The worm wheel assembly includes a worm wheel and two bearings for supporting the worm wheel in the accommodating portion. The worm wheel is engaged with the worm shaft. The lead screw is disposed through the worm wheel and driven by the motor for rotation. The telescopic pipe slips on the lead screw to be threadedly connected therewith. The outer pipe slips on the telescopic pipe. The rotation of the lead screw drives the telescopic pipe to linearly extend or retract relative to the outer pipe.

An actuator comprises a housing, a motor, a drive mechanism and a clutch coupled to the drive mechanism. The motor is mounted displaceably relative to the housing. A displacement of the motor relative to the housing is operative to actuate the clutch.

This application is directed to a braking mechanism that is used in a lifting column. The braking mechanism comprises a connecting component, a mounting seat, and a self-locking spring. The connecting component includes a first spline portion, a stepped portion, an intermediate connection portion, and a second spline portion, arranged sequentially along an axis. The second spline portion and the intermediate connection portion pass through the mounting seat. The stepped portion contacts an end face of the mounting seat. The self-locking spring is mounted on the intermediate connection portion. An end of the self-locking spring is fixed to the mounting seat.

A transmission device (1) includes a gearbox (10), a motor set (20) and a braking set (30). The gearbox (10) includes a housing (11) and a transmission set (12) arranged in the housing (11), and the housing (11) includes a socket (111). The motor set (20) includes a motor body (21) and a rotating shaft (22) disposed protrusively from the front side of the motor body (21). The rotating shaft (22) is inserted in the socket (111) and connected to the transmission set (12). The braking set (30) is installed on the rotating shaft (22) and positioned in the socket (111), and the braking set (30) applies braking force on the rotating shaft (22). Therefore, the effect of saving space at the end of the motor is achieved.

Disclosed is a linear actuator, including a drive motor, a transmission assembly, a rotary screw, a transmission nut, a clutch device, a self-locking device and a hand-pull release assembly. The clutch device is arranged between the transmission assembly and the rotary screw. The self-locking device is configured to generate frictional resistance to the rotary screw when the rotary screw rotates reversely, and the self-locking device includes a release torsion spring. The hand-pull release assembly includes a first driving member connected with the clutch device and a second driving member connected with the self-locking device, and has an initial state and a fully released state. During the process from the initial state to the fully released state, the first driving member drives the clutch device to disconnect power, and the second driving member drives the release torsion spring to extend.

A biopsy system driver includes a motor having a rotatable output shaft, a support structure, a drive shaft, an elongate lead screw and a biopsy instrument drive member. The drive shaft is rotatably coupled to the support structure and includes or is otherwise operatively connected to the motor output shaft such that activation of the motor rotates the drive shaft. The elongate lead screw is coupled to the drive shaft such that rotation of the drive shaft rotates the lead screw about an axis of the lead screw. The lead screw is axially translatable relative to the drive shaft and to the support structure. The biopsy instrument drive member is threadably coupled to the lead screw such that rotation of the lead screw causes axial translation of one of the lead screw and biopsy instrument drive member relative to the other one and to the support structure.

The present invention discloses a brake mechanism and a lifting column using the brake mechanism, and relates to the technical field of lifting columns. The brake mechanism includes a connecting component, a mounting seat and a self-locking spring, the connecting component includes a first spline part, a intermediate connection part, and a second spline part that are successively disposed, the intermediate connection part includes a cylindrical section and a limiting structure, and the mounting seat is sleeved over the cylindrical section on one side of the limiting structure, and abuts against the limiting structure, to enable the connecting component to circumferentially rotate relative to the mounting seat; and the self-locking spring is sleeved over the cylindrical section on the other side of the limiting structure, and one end of the self-locking spring is limited on the mounting seat. The brake mechanism has a self-locking force value measured before assembly.