Limiting device for cylinder rotation variable hydraulic pump of concrete mixer truck
A technology for concrete mixer trucks and variable variable hydraulic pumps, which is applied to components of elastic fluid pumping devices, variable displacement pump components, liquid fuel engines, etc., which can solve the problem of increasing maintenance and production costs and reducing the use of hydraulic oil pumps Life, affecting the working efficiency of the mixer truck and other issues, to achieve the effect of safe and reliable use, prolonging the service life and protecting safety
Active Publication Date: 2013-06-05
HUNAN XINGMA AUTOMOBILE CO LTD
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Problems solved by technology
[0002] The mixing drum of the concrete mixer needs different rotation speeds and rotation directions under different working conditions, so the hydraulic oil pump (variable plunger oil pump) is required to output hydraulic oil in different displacements and directions as required, but there are problems when the hydraulic oil pump is working. The limit angle means that the servo rod of the hydraulic oil pump is required to have a limit position. Once the limit angle is exceeded, the hydraulic oil pump will be damaged, which will directly affect the working efficiency of the mixer truck, reduce the service life of the hydraulic oil pump, and increase the amount of maintenance and production costs.
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[0011] from figure 1 , figure 2 It can be seen from the figure that: a limiting device for a concrete mixer truck cylinder rotating variable hydraulic pump, including an oil pump support plate 1 and a hydraulic oil pump 7, the hydraulic oil pump 7 is fixed and installed on a vertically arranged and groove-shaped oil pump support plate with bolts 1, and make the control (manipulation) rod of the hydraulic oil pump 7 protrude upwards. Position plate 6, and make the arc-shaped plate face of the fan-shaped limit plate 6 face to the left, the right end of the sector-shaped limit plate 6 is a fork with an inner spline mounting hole and a straight notch and a bolt hole. Joint 8, the fork joint 8 is set on the extended end section of the control (control) rod of the hydraulic oil pump 7 and fixedly connected with bolts. The arc-shaped plate surface of the fan-shaped limiting plate 6 is divided into front, In the middle and rear parts, the boundary between the rear part and the midd...
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The invention relates to a limiting device for a cylinder rotation variable hydraulic pump of a concrete mixer truck, which belongs to a concrete mixer truck and is characterized in that: a fan-shaped limiting plate is fixedly arranged on a control rod of a hydraulic oil pump; a semispherical surface reference slot is correspondingly formed on the left end edge of the fan-shaped limiting plate; semispherical surface limiting slots are uniformly formed in an anticlockwise mode and a clockwise mode respectively and a rectangular front limiting bump and a rectangular back limiting bump are formed on the left end edge of the fan-shaped limiting plate on the front and rear sides of the reference slot; a sleeve fixing plate is arranged and a columnar sleeve which stretches to the right is welded on an oil pump support plate; a spring seat, a spring and a steel ball are sequentially arranged in the sleeve from left to right; the partial spherical surface of the steel ball is correspondingly embedded into the reference slot of the fan-shaped limiting plate; and an external operating rod is arranged in an installation hole on the front right side of the fan-shaped limiting plate. The fan-shaped limiting plate is rotated by the external operating rod, and a servo cylinder is controlled by the control rod, so that certain output volume is achieved by the hydraulic oil pump, and the hydraulic oil pump is protected and has long service life and high working efficiency.
Description
technical field [0001] The invention belongs to a concrete mixer truck, in particular to a limit device for the rotation of a cylinder body of a concrete mixer truck. Background technique [0002] The mixing drum of the concrete mixer needs different rotation speeds and rotation directions under different working conditions, so the hydraulic oil pump (variable plunger oil pump) is required to output hydraulic oil in different displacements and directions as required, but there are problems when the hydraulic oil pump is working. The limit angle means that the servo rod of the hydraulic oil pump is required to have a limit position. Once the limit angle is exceeded, the hydraulic oil pump will be damaged, which will directly affect the working efficiency of the mixer truck, reduce the service life of the hydraulic oil pump, and increase the amount of maintenance and production costs. . Contents of the invention [0003] The purpose of the present invention is to provide a ...
Claims
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IPC IPC(8): F04B53/00
Inventor 裴志军马开富张峰李鹏飞李立
Owner HUNAN XINGMA AUTOMOBILE CO LTD