Abstract: A power tool includes a housing that encloses a motor, and a collet configured to be driven to rotate by the motor. The collet defines a drill axis about which the collet is configured to rotate. The power tool also includes a sensor assembly having a front wall with a wall contact surface. The front wall includes a first wall portion and a second wall portion that define a gap therebetween. An object sensor is secured to the front wall proximate the gap. A support member includes a first end portion attached to the front wall and a second end portion attached to the housing. The support member extends from the housing to position the front wall forwardly of the collet such that the drill axis intersects the gap.

Abstract: A power tool includes a housing that encloses a motor, and a collet configured to be driven to rotate by the motor. The collet defines a drill axis about which the collet is configured to rotate. The power tool also includes a sensor assembly having a front wall with a wall contact surface. The front wall includes a first wall portion and a second wall portion that define a gap therebetween. An object sensor is secured to the front wall proximate the gap. A support member includes a first end portion attached to the front wall and a second end portion attached to the housing. The support member extends from the housing to position the front wall forwardly of the collet such that the drill axis intersects the gap.

Abstract: A turbocharger turbine having a double-layer flow passage and a variable cross-section, including a turbine housing, a volute diffuser channel, a power turbine, a volute gas feeding passage, and a partition wall. The volute gas feeding passage is arranged in the turbine housing. The partition wall is arranged in the volute gas feeding passage and divides the volute gas feeding passage into an external volute gas feeding passage and an internal volute gas feeding passage. The external volute gas feeding passage is located outside the internal volute gas feeding passage. The combination of the external and internal volute gas feeding passages forms different flow areas, sufficiently utilizing the waste gas energy of engines in a segmented mode. The variable cross-section turbine has a simple structure, is easy to upgrade at low cost, and can be easily mass-manufactured.

Abstract: A compressor unit including a compressor housing, a compressor impeller, a gas diffuser channel, a cylinder-shaped rotating diffuser wall, and a supporting device. The compressor housing includes an air inlet and an air collection channel. The compressor impeller is installed in the compressor housing. The gas diffuser channel is disposed between the compressor impeller and the air collection channel and connected to the air collection channel. The cylinder-shaped rotating diffuser wall is disposed between an inner wall of the compressor housing and the compressor impeller and rotates in the same direction as the compressor impeller. The supporting device is disposed in the compressor housing to support the cylinder-shaped rotating diffuser wall. The compressor unit has high response speed, large air inlet flow, and high efficiency.

Abstract: A compressor unit including a compressor housing, a compressor impeller, a gas diffuser channel, a cylinder-shaped rotating diffuser wall, and a supporting device. The compressor housing includes an air inlet and an air collection channel. The compressor impeller is installed in the compressor housing. The gas diffuser channel is disposed between the compressor impeller and the air collection channel and connected to the air collection channel. The cylinder-shaped rotating diffuser wall is disposed between an inner wall of the compressor housing and the compressor impeller and rotates in the same direction as the compressor impeller. The supporting device is disposed in the compressor housing to support the cylinder-shaped rotating diffuser wall. The compressor unit has high response speed, large air inlet flow, and high efficiency.

Abstract: A turbocharger turbine having a double-layer flow passage and a variable cross-section, including a turbine housing, a volute diffuser channel, a power turbine, a volute gas feeding passage, and a partition wall. The volute gas feeding passage is arranged in the turbine housing. The partition wall is arranged in the volute gas feeding passage and divides the volute gas feeding passage into an external volute gas feeding passage and an internal volute gas feeding passage. The external volute gas feeding passage is located outside the internal volute gas feeding passage. The combination of the external and internal volute gas feeding passages forms different flow areas, sufficiently utilizing the waste gas energy of engines in a segmented mode. The variable cross-section turbine has a simple structure, is easy to upgrade at low cost, and can be easily mass-manufactured.