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A wrench or spanner is a tool used to provide grip and mechanical advantage in applying torque to turn objects—usually rotary fasteners, such as nuts and bolts—or keep them from turning. In Commonwealth English (excluding Canada), spanner is the standard term. The most common shapes are called open-ended spanner and ring spanner. The term wrench is generally used for tools that turn non-fastening devices (e.g. tap wrench and pipe wrench), or may be used for a monkey wrench - an adjustable pipe wrench.
Accurate leveling mobile culture bed
The invention provides an accurate leveling mobile culture bed solving the problems that the traditional mobile culture bed is inconvenient to adjust in height and cannot ensure that the bed surface is absolutely level. The height adjustment and the level adjustment of the accurate leveling mobile culture bed are implemented through the height adjustment and the level adjustment of a rolling shaft support, and the height adjustment and the level adjustment of the rolling shaft support are implemented through rotating a hold-down nut on a screw rod by using a spanner to adjust the relative distance between the rolling shaft support and a gantry support and the self level of the rolling shaft support. Because the rolling shaft support and the gantry support are connected by a leveling screw and fixed by the nut, and the spacing adjustment and the level adjustment between the rolling shaft support and the gantry support are completed by the relative movement between the leveling screw and the hold-down nut, the continuous smooth adjustment between the rolling shaft support and the gantry support can be implemented to achieve the absolute level of the culture bed surface.
Owner:BEIJING HUANONG AGRI ENG DESIGNING & CONSULTING