What is the tolerance range of precision screws?
What is the tolerance range of precision screws?
The purpose of Guangdong Yueluo Hardware Industry Co., Ltd. is to provide a bayonet which is a T-shaped cylindrical pin with a misaligned through hole at the head, and a bayonet spring which is a ring-shaped spring steel wire whose ends are staggered. The retaining ring is clamped by the bayonet pin to fix the stop sleeve and the pin shaft together. A hydraulic excavator pin stopper with high disassembly and assembly efficiency and no need for a wrench. The technical solution of Guangdong Yueluo Hardware Industry Co., Ltd. is such that it includes a latch, a stop sleeve, a pin, a bayonet, and a circlip. The staggered end is clamped into the misaligned through hole of the plug, and screwed on the bottom of the stopper sleeve to fix the stopper sleeve and the pin shaft together. The latch is composed of a bayonet pin and a circlip, the circlip is screwed around the through hole of the bayonet pin to the root of the bayonet pin, and the stopper sleeve is tightly wrapped around the pin shaft, and the circlip is tightly against the bayonet pin. The head of the bayonet pin has two T-shaped cylindrical pins with staggered through holes, and the circlip is an annular spring steel wire whose ends are staggered. By adopting the pin shaft stopping method of the above technical scheme, it is extremely convenient and quick to disassemble and assemble the pin shaft. The bolt of Guangdong Yueluo Hardware Industry Co., Ltd. is only composed of a T-shaped cylindrical pin with two staggered through holes in the head and a ring-shaped spring steel wire with staggered ends. The structure is simple, convenient to manufacture, low cost and obvious. It is an excavator pin stop method with high disassembly and assembly efficiency, no need for a wrench and low manufacturing cost.
The flat gasket is a gasket whose upper and lower end faces are flat. The flat gasket used in the automobile differential is installed between the casing and the gear of the differential like the spherical gasket to reduce friction and reduce friction. Improve lubrication. The differential should accommodate severe bumps and be able to operate at high speeds for long periods of time in high and low temperature environments. Since both ends of the flat gasket currently used in the differential are smooth, or only one side end face of the flat gasket is provided with small concave points, during the high-speed operation of the differential, the flat gasket The lubrication of the contact surfaces is not ideal, and the friction between the contact surfaces is large, which is prone to failure.
Currently, a screw generally includes a shank body, a threaded portion formed on the outer edge of the shank body, and a conical head formed at the rear end of the shank body. When the current thread is in use, since the thread part is cylindrical, the thread part and the workpiece are vertical, so it is relatively laborious when in use, and it is difficult to locate, lock and unlock.
The product structure in the known technology includes a T-shaped bolt with a longitudinal section, and a polygonal nut matched with the bolt. The bolt is divided into two parts: the screw and the screw head. The screw head is placed at one end of the screw to form an integral part. The radial length of the tightening surface of the screw head is greater than the radial length of the screw, and its axial length is less than the axial length of the screw; The solid surface is a polygon, and now a hexagon is commonly used. The periphery of the base of the nut and the screw head has a number of elastic surfaces corresponding to the polygon; the periphery of the axial screw is provided with an external thread matching the internal thread of the nut. In actual use, the fastener of this structure can be tightened by using a conventional screw, such as a wrench. Therefore, its anti-theft performance is poor and it is not suitable for occasions with special requirements.
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