Water pump for mounting at motorcycle water-cooled engine cylinder block

Abstract

A water pump installed on the water-cooled engine cylinder block of a motorcycle. The water pump cover (2) is installed on the end surface of the water pump body (1) to form a pump chamber (6). The water inlet and outlet channels (7, 8) of the water pump and the pump chamber (6) are connected, the mounting surface (L) on the water pump body (1) matched with the engine block is parallel to the axis line of the water pump shaft (3), and the water pump body (1) is used to connect with the engine block The center line of the bolt hole (9) is perpendicular to the mounting surface (L), and the end of the water pump body (1) corresponding to the water pump gear (5) is fitted with a support (10) in a box structure, and the water pump gear (5) Located in the cavity of the support (10), the support (10) is also provided with a bolt hole (11) connected with the engine block. In the invention, the installation and maintenance of the water pump are more convenient, the speed of the water flow into the cylinder body is fast under the condition of the same speed of the impeller of the water pump, the cooling effect of the engine is better, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the technical field of engines, and in particular relates to a new design of a water pump installation method for a motorcycle water-cooled engine. Background technique [0002] figure 1 , figure 2 They are the structure diagram and installation diagram of the water pump on the existing motorcycle water-cooled engine respectively. It can be seen from the figure that the water pump is mainly composed of the water pump body 1, the water pump cover 2, the water pump shaft 3, the impeller 4 and the water pump gear 5. The water pump is installed on the On the right cover of the crankcase, it is driven by the crankshaft (also driven by an oil pump or clutch gear). The installation surface between the water pump body 1 and the right case cover is perpendicular to the axis line of the water pump shaft 3. When assembling, the bolts are connected to the water pump cover 2. The water pump body 1 is connected and fixed together with the...

AI Technical Summary

Problems solved by technology

[0002] figure 1 , figure 2 They are the structure diagram and installation diagram of the water pump on the existing motorcycle water-cooled engine respectively. It can be seen from the figure that the water pump is mainly composed of the water pump body 1, the water pump cover 2, the water pump shaft 3, the impeller 4 and the water pump gear 5. The water pump is installed on the On the right cover of the crankcase, it is driven by the crankshaft (also driven by an oil pump or clutch gear). The installation surface between the water pump body 1 and the right case cover is perpendicular to the axis line of the water pump shaft 3. When assembling, the bolts are connected to the water pump cover 2. The water pump body 1 is connected and fixed together with the right tank cover. Since the water pump gear 5 is larger than the outer diameter of the water pump body 1, the water pump should be installed on the right tank cover of the engine first, and then installed together with the right tank cover. Inconvenient to install on the engine

Equally, if the water pump breaks down and needs to be maintained, the water pump must be removed together with the right case cover first, and then the water pump will be separated from the right case cover to carry out corresponding maintenance, which also has the problem of inconvenience

[0003] In addition, because the water outlet of the pump chamber 6 and the water outlet 8 are misaligned with each other, the water coming out of the pump chamber 6 needs to change direction twice to flow out of the water pump. The flow resistance of the water flow is large, and the water flow velocity entering the engine block is low. The cooling effect of the engine is poor. On the other hand, the water pump has to work at a high speed for a long time, which easily shortens the life of the water pump and reduces its reliability.

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