43results about How to "Small rise angle" patented technology

The invention provides a road construction device capable of conducting dust fall. The road construction device is used for conducting grinding on the local protrusion on the construction road surface in the road construction process. The road construction device comprises an external shell (8), a motor (9) and a grinding head drive rod component (6) driven by the motor (9). The motor (9) is in power connection with a splined hole in a drive sleeve portion (61) of the grinding head drive rod component (6) in the axial direction in a slidable mode through a spline rod (91) fixedly connected with the motor (9). The drive sleeve portion (61) of the grinding head drive rod component (6) is fixedly connected with a grinding head mounting rod portion (62) of the grinding head drive rod component (6) through gradually contractile connection portions (612).

Environmentally friendly road construction equipment is used for grinding local bulges on construction road surface during road construction, and comprises an external housing (8), a motor (9) and a grinding head drive lever member (6) driven by the motor (9), the motor (9) is in axial slidable power connection with a spline hole in a drive sleeve portion (61) of the grinding head drive lever member (6) by a fixedly connected spline rod (91), and the drive sleeve portion (61) of the grinding head drive lever member (6) is fixedly connected with a grinding head mounting rod portion (62) of the grinding head drive lever member (6) by a gradual contractile connecting portion (612).

The invention discloses a high-prestress large-ductility constant-resistance deformation yielding anchor cable for mine reinforcing. The high-prestress large-ductility constant-resistance deformation yielding anchor cable is characterized in that the cable is twisted by steel wires, a plurality of hollow yielding cage bodies are arranged on a cable body at intervals, and cavities of the yielding cage bodies are filled with press-in macromolecule filler. In the working process, the anchor cable is placed in an anchor cable hole, the head of the anchor cable is fixed at the bottom of the anchor cable hole through an anchoring agent, and an anchor cable tray and a lock are used for fixing the tail portion of the anchor cable on the roadway surface outside an anchor cable hole opening. When surrounding rock of a roadway is subjected to breaking and expanding deformation, the cage bodies can be yielded by the anchor cable through shrinkage, and the length of the anchor cable is increased for yielding. Compared with the prior art, the high-prestress large-ductility constant-resistance deformation yielding anchor cable is simple and easy to implement, easy to construct and capable of effectively releasing rock stratum pressure.

A road construction device provided with an alarm light is used for polishing local projections on a pavement being constructed during road construction. The device includes an outer shell (8), a motor (9), and a polishing head driving rod part (6) driven by the motor, wherein the motor (9) is connected to a spline hole in a driving sleeve part (61) of the polishing head driving rod part (6) through a fixedly-connected spline rod (91) in an axial and slidable powered manner. The driving sleeve part (61) of the polishing head driving rod part (6) is fixedly connected to a polishing head mounting rod part (62) on the polishing head driving rod part (6) through a gradually shrunk connection part (612).

The invention discloses a central shaft of a continuously variable transmission of a snowmobile. A fixed disc (2) is fixed on one end of the central shaft (1); the central shaft (1) is a hollow shaft which is provided with an axial through hole; and an engine output shaft mounting hole is arranged along the axial line of the central shaft. The central shaft of the continuously variable transmission of the snowmobile is characterized in that: the engine output shaft mounting hole is formed by a taper hole (1a) and a screwed hole (1b) which are jointed; the large end of the taper hole (1a) is connected with the end surface of the end, which is provided with the fixed disc, of the central shaft (1); and the screwed hole (1b) is a fine-thread screwed hole. The central shaft of the continuously variable transmission of the snowmobile can ensure the concentricity and balance of the engine output shaft and a driving wheel of the continuously variable transmission and reduce the vibration during the running so as to effectively ensure the working performances of the engine and the continuously variable transmission of the snowmobile.

The invention discloses a hole digging machine with an adjustable hole digging speed. The hole digging machine comprises an external shell (8), a driving motor (9) and a hole digging drill rod assembly (6). The hole digging drill rod assembly (6) can be driven by the driving motor (9), the driving motor (9) is arranged in the external shell (8), an electronic control device (14) is arranged on a shell of the driving motor (9), is electrically connected with the driving motor (9) and is used for controlling and regulating the rotational speed of the driving motor (9), the driving motor (9) is axially slidably in power connection with a spline hole in a driving sleeve (61) of the hole digging drill rod assembly (6) by a fixedly connected spline rod (91), and the driving sleeve (61) of the hole digging drill rod assembly (6) is fixedly connected with a drill rod (62) of the hole digging drill rod assembly (6) by a gradually reducing connecting portion (612).

A shock-absorbing road construction device, used for grinding local protrusions on the construction road surface during road construction, comprising an external casing (8), a motor (9) and a grinding head driven by the motor (9) The drive rod part (6), wherein the motor (9) is fixedly coupled with the spline hole shaft in the drive sleeve part (61) of the grinding head drive rod part (6) through a spline rod (91) To slidable power connection, the driving sleeve part (61) of the grinding head driving rod part (6) is connected with the grinding head installation rod part ( 62) Fixed connection.