초록 ▼

The brake includes a housing for mounting and a disc assembly. The disc assembly engages a drive shaft for rotation therewith. A flange on the disc assembly receives a first ring and a second ring, each ring is slideably engaged to the flange for axial motion. Release plates adjacent to the second r

The brake includes a housing for mounting and a disc assembly. The disc assembly engages a drive shaft for rotation therewith. A flange on the disc assembly receives a first ring and a second ring, each ring is slideably engaged to the flange for axial motion. Release plates adjacent to the second ring are free to move in an axial direction. A field cup has springs to bias the release plates against the second ring and o-rings to facilitate quiet operation of the elevator car brake. When no current flows through the coil, the release plates are biased against the second ring. Thus, the second ring engages the friction surface of the housing to park and hold the drive shaft. When current flows through the coil, the first and second release plates are drawn to the field cup, overcome the bias force of the springs and compress the o-rings.

대표청구항 ▼

The brake includes a housing for mounting and a disc assembly. The disc assembly engages a drive shaft for rotation therewith. A flange on the disc assembly receives a first ring and a second ring, each ring is slideably engaged to the flange for axial motion. Release plates adjacent to the second r

The brake includes a housing for mounting and a disc assembly. The disc assembly engages a drive shaft for rotation therewith. A flange on the disc assembly receives a first ring and a second ring, each ring is slideably engaged to the flange for axial motion. Release plates adjacent to the second ring are free to move in an axial direction. A field cup has springs to bias the release plates against the second ring and o-rings to facilitate quiet operation of the elevator car brake. When no current flows through the coil, the release plates are biased against the second ring. Thus, the second ring engages the friction surface of the housing to park and hold the drive shaft. When current flows through the coil, the first and second release plates are drawn to the field cup, overcome the bias force of the springs and compress the o-rings. k, wherein: said first pipe and said second pipe are connected and locked together integrally, said first pipe is provided thereon with a position-limiting sleeve having therein a restoring element and has on the external surface thereof two sliding bearings, said second pipe is provided therein with a driving element, said rotating sleeve is slipped over said first pipe, said pushing member is slipped over said pushing axle-rod and is provided in said first pipe, said pushing member is linked up with said rotating sleeve on one end thereof and is connected with said chuck on the other end thereof, an end of said pushing member connecting with said chuck is abutted against said restoring element, and said hand tool is formed; said structure is characterized in that: said first pipe is provided thereon with said position-limiting slot, said rotating sleeve is pivotally connected with said pushing member through a pivotally-connecting element, said pivotally-connecting element extends through said position-limiting slot, said pushing axle-rod has a bearing slipping thereover to abut against said pushing member; and said first pipe is provided with two positioning holes which are provided therein each with a position-limiting element, said first pipe is provided therein at said position-limiting elements with an elastic piece and a positioning groove, said position-limiting elements displace in said positioning holes, thereby when in operation of said pushing axle-rod, said rotating sleeve and said pushing member are simultaneously rotated and moved respectively to push said pushing axle-rod, and thereby said chuck gets effects of loosening and clamping tight to attain an object of changing a grinding member during operation of said hand tool. 2. The improved structure of hand tool as claimed in claim 1, wherein said driving element is connected with an electric power-line through a connecting device. 3. The improved structure of hand tool as claimed in claim 1, wherein said restoring element is fixed in said positioning sleeve. 4. The improved structure of hand tool as claimed in claim 1, wherein said driving element is linked up with said pushing axle-rod through a driving rod and a notch. 5. The improved structure of hand tool as claimed in claim 1, wherein said pushing member is screw connected in said first pipe. exchanger that performs heat exchange using outside air, said heat exchanger being provided within an area formed by a vertical plane passing through a front end of the vehicle main frame and a horizontal plane passing through an upper end of the steering member; said heat exchanger including a radiator for cooling coolant and an oil cooler for cooling lubricating oil, said oil cooler being attached on a front surface of said radiator; and said vehicle includes a front grill having two backwardly extending arms directly attached to opposite sides of said radiator for covering a front portion of said oil cooler and said radiator, said front grill having an approximately C-shaped cross section when viewed from above. 2. The cooling apparatus according to claim 1, wherein a front end portion of said vehicle main frame comprises: a tilt member extending diagonally, upward and rearward from the front end of said vehicle main frame; said steering member is provided projecting upward from a position adjacent an upper end of said tilt portion; and said heat exchanger is attached to said tilt member of said vehicle main frame. 3. The cooling apparatus according to claim 2, wherein said area in which said heat exchanger is provided is also bounded by said tilt member. 4. The cooling apparatus according to claim 1, wherein a front end portion of said vehicle main frame comprises: a tilt member extending diagonally, upward and rearward from the front end of said vehicle main frame; and said area in which said heat exchanger is provided is also bounded by said tilt member. 5. The cooling apparatus according to claim 1, wherein said heat exchanger is located below said horizontal plane and rearward of said vertical plane. 6. A vehicle, comprising: a vehicle main frame; a steering member provided in a front upper position of said vehicle main frame; and a cooling apparatus mounted on said vehicle main frame, said cooling apparatus comprising: a heat exchanger that performs heat exchange using outside air, said heat exchanger being provided within an area formed by a vertical plane passing through a front end of the vehicle main frame and a horizontal plane passing through an upper end of the steering member; said heat exchanger including a radiator for cooling coolant and an oil cooler for cooling lubricating oil, said oil cooler being attached on a front surface of said radiator; and said vehicle including a front grill having two backwardly extending arms directly attached to opposite sides of said radiator for covering a front portion of said oil cooler and said radiator, said front grill having an approximately C-shaped cross section when viewed from above. 7. The vehicle according to claim 6, wherein a front end portion of said vehicle main frame comprises: a tilt member extending diagonally, upward and rearward from the front end of said vehicle main frame; said steering member is provided projecting upward from a position adjacent an upper end of said tilt portion; and said heat exchanger is attached to said tilt member of said vehicle main frame. 8. The vehicle according to claim 7, wherein said area in which said heat exchanger is provided is also bounded by said tilt member. 9. The vehicle according to claim 6, wherein a front end portion of said vehicle main frame comprises: a tilt member extending diagonally, upward and rearward from the front end of the vehicle main frame; and said area in which said heat exchanger is provided is also bounded by said tilt member. 10. The vehicle according to claim 6, wherein said heat exchanger is located below said horizontal plane and rearward of said vertical plane. 11. A cooling apparatus for a vehicle, said vehicle having a vehicle main frame and a steering member provided in a front upper position of said vehicle main frame, said cooling apparatus comprising: a heat exchanger that performs heat exchange using outside air, said heat exchanger bei ng mountable within an area formed by a vertical plane passing through a front end of the vehicle main frame and a horizontal plane passing through an upper end of the steering member; said heat exchanger including a radiator for cooling coolant and an oil cooler for cooling lubricating oil, said oil cooler being attached on a front surface of said radiator; said vehicle including a front grill having two backwardly extending arms directly attached to opposite sides of said radiator for covering a front portion of said oil cooler and said radiator, said front grill having an approximately C-shaped cross section when viewed from above. 12. The cooling apparatus according to claim 11, wherein a front end portion of the vehicle main frame comprises: a tilt member extending diagonally, upward and rearward from the front end of the vehicle main frame; the steering member is provided projecting upward from a position adjacent an upper end of the tilt portion; and said heat exchanger is attachable to said tilt member of the vehicle main frame. 13. The cooling apparatus according to claim 11, wherein said heat exchanger is located below said horizontal plane and rearward of said vertical plane.