Low speed heavy pressure vane pump for hydraulic bicycle

Abstract

The invention discloses a low-speed high-pressure vane pump for hydraulic bicycles. The invention comprises an end cover, a principal axis, a framework oil seal, a right casing, a blade, a middle casing, a left casing, a bearing, an O-shaped sealing ring, a bolt, a pressure-limiting spring, a spring seat, a regulating nut, a side end cover, a rotor, a stator, a slide block, a cover plate, a flow adjusting screw, a sealing ring, a lock nut and a needle roller. The invention is characterized in that: a vane groove is arranged in the rotor, a vane spring and a vane bracket are arranged in the vane groove, the vane bracket is positioned by the vane spring, the blade is arranged in the vane groove of the rotor, one end of the blade presses the vane spring, while the other end clings to the inner surface of the stator. The low-speed high-pressure vane pump for the hydraulic bicycles has the advantages of reasonable structure, light self-weight, small bulk, high efficiency, low cost, labor conservation and rapidness, which is adopted to be matched with all wheel diameters of bicycles and has the function of pressure servo variation.

Description

technical field [0001] The invention relates to a vane pump, in particular to a low-speed and high-pressure vane pump for hydraulic bicycles. Background technique [0002] The power of existing vane oil pumps all considers the industrial use of products, such as machine tools, hydraulic machines, excavators, automobiles, etc., the power is generally 1 kilowatt to tens of kilowatts, and the rotating speed is 1000~1500 rpm. Parts, materials, structure, weight, installation, appearance, etc. are all oriented from the perspective of industrial machinery and tools as a whole, and are not suitable for civilian use, as shown in Figure 1 and Figure 2. In the figure, 1' is the end cover, 2' is the main shaft, 3' is the skeleton oil seal, 4' is the right shell, 5' is the vane, 6' is the middle shell, 11' is the left shell, 12' is the bearing, 14', 14-1', 14-2' are "O" seal rings, 15', 15-1' are screws, 16' are pressure limiting springs, 17' are spring seats, 18' are adjusting screws,...

AI Technical Summary

Problems solved by technology

But also there are many fundamental deficiencies in the direct use of existing vane pumps in hydraulic bicycles:

Although there are some innovations to meet the low-speed requirements of the vane oil pump at a minimum speed of 5km / h when riding a two-wheeled vehicle at a low speed of 15-30R / min, there is still the problem of extremely low volumetric efficiency (close to zero) at high pressure (4mpa).

[0004]2. Power mismatch

However, all kinds of transmissions have common disadvantages: complex structure, inconvenient operation, small speed range, and the transmission cannot reasonably match the output of the human body (N human body power = F pedal output. V vehicle speed)

However, when the oil pressure of the bicycle rises rapidly to 4-6Mpa in a relatively short time, distance, and starting (vehicle speed is 0 to rated speed 25km / h), due to the accumulation of the maximum clearance of the blade and the oil distribution window to 0.04-0.06mm, then Due to the force of the screws connecting the left and right housings and the elastic deformation of the housings, the gap between the oil distribution plate and the blades that are integrated with the left and right housings will further increase, and the internal leakage of the blades will increase, and the pressure generated by the oil pump will form due to leakage. Severe pressure fluctuations, the outlet flow is zero, unable to drive the oil motor to drive the wheels to rotate, so that the starting acceleration, uphill and other working conditions fail

If the torque of the ball plug oil motor used for bicycles matched with the oil pump is increased to reduce the working oil pressure of the oil pump, the size of the ball plug distribution section must be increased, and the weight of the vehicle will be increased, cost and resource consumption will increase, and the appearance will also be unsightly.

[0007]5. Strict technical requirements, complex procedures, complex materials and processes

[0019]6. Heavy weight

[0020]7. Waste of resources

Industrial vane pumps are made of a variety of alloy steels and rare metals. The vane pumps used for human-powered bicycles are overkill, waste resources, and limit social progress.

[0021]8. High cost

Due to the complex process of the existing vane pump and low production yield, it cannot be matched with hundreds of millions of hydraulic bicycles

Moreover, it is produced with a large amount of metal materials, and the cost is also high

The new generation of hydraulic bicycles cannot meet the needs of people who are widely used, promote social progress, social environmental protection and low-income people

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