34results about How to "Achieve circumferential limit" patented technology

The invention discloses a connecting structure for a motor output shaft and a rotary shaft. The connecting structure comprises a motor output shaft and a rotary shaft. The rotary shaft is embedded inthe motor output shaft and is provided with a plurality of bumps distributed in a radial shape along the axis of the rotary shaft. The motor output shaft is provided with a circumferential stopping slot that cooperates with the bumps. A first stopping assembly is disposed on the motor output shaft. A first groove is arranged on the rotary shaft and cooperates with the first stopping assembly. A second stopping assembly is arranged on the rotary shaft. The motor output shaft is provided with a wavy second groove arranged in the axial direction and matching the second stopping assembly. The connecting structure does not require an external connector, can directly realize the clamping connection between the motor output shaft and the rotary shaft of mechanical equipment. The axial and circumferential dual restrictions guarantee the concentricity during the assembly of the motor output shaft and the rotary shaft. The connecting structure is good in stability and avoids shaft loosening.

The invention discloses a body building chair. Two sides of a chair main body are respectively provided with a handle mechanism, two pedal mechanisms are arranged at the lower-front side of the chair main body, a first connecting rod in each handle mechanism is L-shaped, one ends of each first connecting rods are connected with handles, the other ends of the first connecting rods are hinged with an installing base, a first potentiometer is arranged on the installing base, a rotating shaft of the first potentiometer is circumferentially limited in a hinge hole in the other end of each first connecting rod, the installing base is hinged with a bracket, a second potentiometer is arranged on the bracket, a rotating shaft of the second potentiometer is circumferentially limited in a hinge hole of the installing base, support rods in each pedal mechanism comprise a first support rod and a second support rod, one ends of which are hinged and can be locked and the other ends are respectively fixed with a cylinder and the bottom of the chair main body. The body building chair is simple in structure, larger in angle for which the handles can be oscillated, and capable of regulating the height of pedals.

The invention discloses a digital fitness chair. Handle mechanisms are arranged on the two sides of a chair body respectively, two pedal mechanisms are arranged on the front lower side of the chair body, first connecting rods in the handle mechanisms are in the shape of N, one ends of the first connecting rods are connected with handles, mounting sleeves are arranged at the other ends of the first connecting rods, the mounting sleeves are movably sleeved and combined on mounting seats, first potentiometers are arranged at one ends of the mounting seats, the rotating shafts of the first potentiometers and the mounting sleeves are circumferentially limited, the other ends of the mounting seats are hinged to supports, second potentiometers are arranged on the supports, the rotating shafts of the second potentiometers are arranged in the hinge holes of the other ends of the mounting seats, the rotating shafts of the second potentiometers and the mounting seats are circumferentially limited, and supporting rods in each pedal mechanism are composed of a first supporting rod and a second supporting rod, one ends of the first supporting rods and one ends of the second supporting rods are hinged and can be locked, and the other ends of the first supporting rod and the other ends of the second supporting rods are fixed with a cylinder barrel and the bottom portion of the chair body respectively. The digital fitness chair is simple in structure, the rotating angle of the handles is large, and the height of pedals can be adjusted.

The invention relates to a button feeding device for a sewing machine, which comprises a machine frame, a button feeding slideway and a turn button mechanism, the button delivery slideway includes a pressure plate that can be adjusted up and down, the turn button mechanism includes a friction column, and the turn button mechanism also includes a sleeve , the friction column protrudes from the lower port of the sleeve; the circular cylinder is used to drive the friction column to move downward, including a retractable and tubular output end; the motor, the output shaft of the motor passes through the output end of the cylinder and is connected with the friction The column is connected by a connecting sleeve, which has a certain up and down movement stroke in the sleeve, and also includes a spring elastically resisting the connecting sleeve. The output end of the circular cylinder drives the connecting sleeve to move downward when it moves; the connecting sleeve is in the sleeve. The stroke of the inner upward movement can be adjusted, and it also includes a limit adjustment assembly for adjusting the upward movement stroke of the friction column. The limit adjustment assembly is set in linkage with the upward and downward adjustment of the pressure plate. The height of buckle-feeding slideway and buckle-turning mechanism can be adjusted synchronously.

The invention discloses a truck anti-rollover device and an anti-rollover method thereof, comprising a fixed support system and a sensor control system; the fixed support system includes a plurality of fixed support units equally divided into two groups and arranged on both sides; the fixed support The unit includes a drive shaft, a support assembly, and a circumferential limit assembly; the support assembly includes an electric push rod assembly, an electric cylinder, and an electric cylinder foot support; the electric push rod assembly includes an electric push rod, a ball hinge, and a support plate; the circumferential limit assembly It includes two-way drive ratchet, pawl, spring, pawl rotating shaft, bevel gear 1, bevel gear 2, bearing seat and drive motor; the sensor control system includes a pressure sensor and an inclination sensor. The present invention supports the truck body when the truck rolls over, and only when the wheel pressure on one side of the truck disappears and the inclination angle of the truck body exceeds the preset inclination angle of the inclination sensor, the device of the present invention can be triggered to avoid the error of the device of the present invention. touch happens.

The invention provides a juicer with a reliable structure. The juicer comprises a machine base, a juice collection container connected to the machine base, an extrusion screw rod longitudinally disposed in the juice collection container, and an upper cover which covers an upper port of the juice collection container, wherein an opening and a feeding channel communicating with the opening are formed in the upper cover; a rotary feeding device is disposed on the upper end of the extrusion screw rod; the rotary feeding device and the extrusion screw rod form an integral manner; the extrusion screw rod drives the rotary feeding device to move; the rotary feeding device comprises a feeding hole and a discharge hole; the feeding hole and the opening are disposed correspondingly; a circumferential limiting structure is disposed on the upper cover; a positioning structure is disposed circumferentially on the rotary feeding device; and the circumferential limiting structure is coordinated withthe positioning structure to conduct circumferential limiting of the extrusion screw rod. Through coordination of the limiting structure and the positioning structure, assembly accuracy of the rotaryfeeding device, the extrusion screw rod and the juice collection container can be further increased; and reliability of transmission can be ensured.