CN107524657B - A highly integrated oil cylinder assembly - Google Patents

Abstract

The invention discloses a highly integrated oil cylinder assembly. Comprises a cylinder pump integrated mechanism, a mechanical stop mechanism, a mechanical floating mechanism and a limit control mechanism; the cylinder pump integrated mechanism comprises an assembly of a power element hydraulic cylinder and an electric pump, an oil tank is arranged below the hydraulic cylinder, and the oil tank is an oil tank of the electric pump; the front end of the oil tank is connected with a motor; the mechanical stop mechanism comprises a stop clamping plate fixed on the head of a piston rod of the hydraulic cylinder, and a plurality of stop clamping grooves are further formed in the stop clamping plate; and a stop pawl is arranged below the stop clamping plate and fixedly connected with a crank through a pin shaft, and the small oil cylinder is connected with the cylinder pump through an oil pipeline in an integrated structure. The hydraulic overturning system is light and simple in structure, convenient and quick to install and use and capable of well achieving a cab stopping function under the condition that the self-locking function of the hydraulic cylinder is invalid, so that potential safety hazards caused by incapability of stopping the cab are eliminated.

Description

A highly integrated oil cylinder assembly

Technical Field

The invention belongs to the field of high-tech light trucks and relates to an oil cylinder assembly, in particular to a highly integrated oil cylinder assembly.

Background technique

The hydraulic flip mechanism of the cab is powered by hydraulic pressure. Through the extension and retraction of the hydraulic cylinder, the cab is rotated to a limited extent around the flip axis, thereby completing the lifting and lowering of the cab. The flip cylinder assembly is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion. It has a simple structure and reliable operation. When it is used to flip the cab, the deceleration device can be eliminated, and there is no transmission gap and the movement is smooth. When it is extended, the cab is supported by an upward force, and the cab begins to flip upward around the flip axis; when the hydraulic cylinder is retracted, the support force on the cab gradually decreases, and the cab falls back downward around the flip axis.

However, most of the hydraulic flip systems currently used in high-tech light truck projects are bulky and complex, not convenient to use, and cannot well achieve the cab stop function in some special cases or when the self-locking function of the hydraulic cylinder fails, thus bringing certain safety hazards. In order to solve the above defects, a solution is now provided.

Summary of the invention

The object of the present invention is to provide a highly integrated oil cylinder assembly.

The purpose of the present invention can be achieved through the following technical solutions:

A highly integrated oil cylinder assembly, including a cylinder pump integrated mechanism, a mechanical stop mechanism, a mechanical floating mechanism, and a limit control mechanism;

The cylinder-pump integrated mechanism is an assembly of a hydraulic cylinder and an electric pump. An oil tank is provided below the hydraulic cylinder, and the oil tank is the oil tank of the electric pump. The electric pump and the oil tank are connected by an oil pipeline. The electric pump is connected to the motor through the motor output shaft.

The mechanical floating mechanism comprises a hydraulic cylinder electrically connected to the motor, a hydraulic cylinder piston rod is arranged in the hydraulic cylinder, and the hydraulic cylinder piston rod is connected to the cab through a swing rod;

The mechanical stop mechanism comprises a stop plate fixed on the head of the hydraulic cylinder piston rod, and a plurality of stop slots are provided on the stop plate; a stop pawl is provided below the stop plate, and the stop pawl is fixedly connected to a crank through a pin shaft; the crank is connected to the small oil cylinder through the small oil cylinder piston rod on the small oil cylinder, and the small oil cylinder is connected to the cylinder pump integrated structure through an oil pipeline;

The limit control mechanism includes an upper limit travel switch limit plate arranged at one end of the stop card plate, and an upper limit travel switch is arranged at the other end of the stop card plate; and a lower limit travel switch limit plate arranged at the lower end of the hydraulic cylinder piston rod and a lower limit travel switch arranged at the lower end of the hydraulic cylinder.

Furthermore, a stop surface is provided in the stop slot.

Furthermore, a torsion spring is also provided on the pin shaft.

Furthermore, the crank and the small oil cylinder piston rod are hinged through a connecting rod.

Furthermore, the swing arms are hingedly connected via hinges.

Furthermore, the stopping pawl includes an upper fulcrum and a lower fulcrum.

The beneficial effects of the present invention are as follows: through the arrangement of the cylinder-pump integrated mechanism, the mechanical floating mechanism, the mechanical stopping mechanism and the limit control mechanism, the present invention can achieve a light and simple structure when applied to the hydraulic flipping system of the high-tech light truck project, and it is convenient and quick to install and use. In addition, in some special cases or when the self-locking function of the hydraulic cylinder fails, the cab stopping function can be well realized, thereby eliminating the potential safety hazard caused by the inability to stop the cab.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

Fig. 1 is a schematic diagram of the structure of the present invention;

Fig. 2 is a schematic diagram of the structure of the present invention;

FIG3 is a connection diagram between the crank and the stop pawl of the present invention;

FIG. 4 is a schematic diagram of the structure of the stop pawl.

1. Upper limit travel switch limit plate; 2. Upper limit travel switch; 3. Lower limit travel switch limit plate; 4. Lower limit travel switch; 5. Connecting rod; 6. Crank; 7. Torsion spring; 8. Stop pawl; 801. Upper fulcrum; 802. Lower fulcrum; 9. Stop plate; 901. Stop slot; 902. Stop surface; 10. Small oil cylinder; 11. Swing rod; 12. Motor; 13. Hydraulic cylinder; 14. Hinge; 15. Hydraulic cylinder piston rod; 16. Pin shaft; 17. Small oil cylinder piston rod; 18. Oil tank.

Detailed ways

A highly integrated oil cylinder assembly comprises a cylinder pump integrated mechanism, a mechanical stop mechanism, a mechanical floating mechanism, and a limit control mechanism.

The cylinder-pump integrated mechanism is an assembly of a hydraulic cylinder 13 and an electric pump. An oil tank 18 is provided under the hydraulic cylinder 13, and the oil tank 18 is the oil tank 18 of the electric pump. The electric pump and the oil tank 18 are connected by an oil pipeline. The electric pump is transmission-connected to the motor 12 through the output shaft of the motor 12. The lifting and lowering of the cab is achieved by controlling the steering direction of the motor 12 of the electric pump.

The mechanical floating mechanism includes a hydraulic cylinder 13 electrically connected to a motor 12, a hydraulic cylinder piston rod 15 is arranged in the hydraulic cylinder 13, and the hydraulic cylinder piston rod 15 is connected to the cab through a swing rod 11; a hinge 14 is connected between the swing rods 11, and both ends of the hydraulic cylinder 13 and the cab are connected by hinges 14 and can rotate freely. During driving, as the cab floats up and down, the hydraulic cylinder 13 moves with the cab through the swing rod 11.

The mechanical stopping mechanism comprises a stopping card plate 9 fixed to the head of the hydraulic cylinder piston rod 15, the stopping card plate 9 moves with the hydraulic cylinder piston rod 15, a plurality of stopping card grooves 901 are also provided on the stopping card plate 9, and a stopping surface 902 is provided in the stopping card groove 901; a stopping pawl 8 is provided below the stopping card plate 9, the stopping pawl 8 comprises an upper fulcrum 801 and a lower fulcrum 802, the stopping pawl 8 is fixedly connected with a crank 6 through a pin shaft 16, a torsion spring 7 is also provided on the pin shaft 16, and the crank 6 and the stopping pawl 8 move with each other; the crank 6 is connected to the small oil cylinder 10 through the small oil cylinder piston rod 17 on the small oil cylinder 10, the crank 6 and the small oil cylinder piston rod 17 are hinged by the connecting rod 5, and the small oil cylinder 10 is connected to the cylinder pump integrated structure through the oil pipeline; the small oil cylinder 10 and the torsion spring 7 indirectly control the unlocking and resetting of the stopping pawl 8 by controlling the crank 6. When the cab is lifted, the piston rod 17 of the small oil cylinder is in an extended state, the piston rod 15 of the hydraulic cylinder is extended, and the stop plate 9 is dragged along the top arc of the upper fulcrum of the stop pawl 8 with the piston rod 15 of the hydraulic cylinder; when the stop pawl 8 moves to the slot hole of the stop slot 901 on the stop plate 9, the stop pawl 8 is reset to a free state under the elastic force of the torsion spring 7 and falls into the stop slot 901; when the cab is lifted into place, the stop pawl 8 falls into the stop slot 901 at the end of the stop plate 9, and the upper fulcrum 801 will be higher than the plane of the stop plate 9;

When repairing the engine and its peripheral accessories, the cab is stuck in mid-air. If the self-locking function of the hydraulic cylinder fails, the hydraulic cylinder piston rod 15 will fall down together with the cab. When the stop surface 902 in the stop slot 901 contacts the upper fulcrum 801 of the stop pawl 8, a force is applied to the stop pawl 8, forcing the stop pawl 8 to rotate. When the lower fulcrum 802 of the stop pawl 8 contacts the outer wall of the cylinder, the pawl is locked (lever principle), and the cab is stopped.

Under normal conditions, before the cab is retracted, the piston rod of the small oil cylinder 10 is retracted, applying a preload force to the crank 6, and the stop pawl 8 rotates to the upper fulcrum 801 and the lower fulcrum 802 without contact with the stop plate 9 and remains there, so that the cab is successfully retracted.

The limit control mechanism includes an upper limit travel switch limit plate 1 arranged at one end of the stop card plate 9, and an upper limit travel switch 2 is arranged at the other end of the stop card plate 9; and a lower limit travel switch limit plate 3 arranged at the lower end of the hydraulic cylinder piston rod 15 and a lower limit travel switch 4 arranged at the lower end of the hydraulic cylinder 13. The circuit principles of the upper limit travel switch 2 and the lower limit travel switch 4 are both normally closed, and are respectively connected in series with the upper and lower control branches of the control circuit. When the cab is lifted to the upper limit, the upper limit travel switch limit plate 1 contacts the upper limit travel switch 2 contact, the travel switch circuit is disconnected, the upward branch is powered off, and the motor stops working; on the contrary, when the cab falls back to the lower limit, the lower limit travel switch limit plate 3 contacts the lower limit travel switch 4 contact, the travel switch circuit is disconnected, the downward branch is powered off, and the motor stops working.

A highly integrated oil cylinder assembly. When the cab is lifted, the piston rod of the small oil cylinder is in an extended state, the piston rod of the hydraulic cylinder is extended, and the stop plate is dragged along the top arc of the upper fulcrum of the stop pawl with the piston rod of the hydraulic cylinder; when the stop pawl runs to the stop slot hole of the stop card plate, the stop pawl is reset to a free state under the action of the elastic force of the torsion spring 7 and falls into the stop slot; when the cab is lifted into place, the stop pawl falls into the stop slot at the end of the stop card plate, and the upper fulcrum will be higher than the plane of the stop card plate; when the engine and its peripheral accessories are repaired, the cab is stopped. In mid-air, if the self-locking function of the hydraulic cylinder fails, the piston rod of the hydraulic cylinder will fall down with the cab. When the stop surface in the stop slot contacts the upper fulcrum of the stop pawl, a force is applied to the stop pawl to force the stop pawl to rotate. When the lower fulcrum of the stop pawl contacts the outer wall of the cylinder, the pawl is locked (lever principle) and the cab is stopped. Under normal conditions, before the cab is retracted, the piston rod of the small oil cylinder is retracted, and a pre-tightening force is applied to the crank. The stop pawl rotates to the upper and lower fulcrums and is in a non-contact state with the stop card plate and is maintained, and the cab is successfully retracted. The present invention is provided with a cylinder pump integrated mechanism, a mechanical floating mechanism, a mechanical stop mechanism, and a limit control mechanism, so that the present invention can be light and simple in structure when applied to the hydraulic flip system of a high-tech light truck project, and is convenient and quick to install and use. In some special cases or when the self-locking function of the hydraulic cylinder fails, the cab stop function can be well realized, thereby eliminating the safety hazards caused by the inability to stop the cab.

The above contents are merely examples and explanations of the structure of the present invention. The technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the protection scope of the present invention.

Claims (3)

1. A highly integrated oil cylinder assembly, characterized by comprising a cylinder pump integrated mechanism, a mechanical stop mechanism, a mechanical floating mechanism, and a limit control mechanism; The cylinder-pump integrated mechanism is an assembly of a hydraulic cylinder (13) and an electric pump, an oil tank (18) is provided below the hydraulic cylinder (13), and the oil tank (18) is an oil tank (18) of the electric pump; the electric pump and the oil tank (18) are connected via an oil pipeline; the electric pump is transmission-connected to the motor (12) via the output shaft of the motor (12); The mechanical floating mechanism comprises a hydraulic cylinder (13) connected to a motor (12) on an electric pump via an oil delivery pipe, a hydraulic cylinder piston rod (15) being arranged in the hydraulic cylinder (13), and the hydraulic cylinder piston rod (15) being connected to the cab via a swing rod (11); The mechanical stop mechanism comprises a stop plate (9) fixed to the head of the hydraulic cylinder piston rod (15), and a plurality of stop grooves (901) are also provided on the stop plate (9); a stop pawl (8) is provided below the stop plate (9), and the stop pawl (8) is fixedly connected to a crank (6) via a pin shaft (16); the crank (6) is connected to the small oil cylinder (10) via a small oil cylinder piston rod (17) on the small oil cylinder (10), and the small oil cylinder (10) is connected to the cylinder pump integrated structure via an oil pipeline; The limit control mechanism comprises an upper limit travel switch limit plate (1) arranged at one end of a stop plate (9), and an upper limit travel switch (2) arranged at the other end of the stop plate (9); a lower limit travel switch limit plate (3) arranged at the lower end of a hydraulic cylinder piston rod (15), and a lower limit travel switch (4) arranged at the lower end of the hydraulic cylinder (13); The pin shaft (16) is also provided with a torsion spring (7); The crank (6) and the small oil cylinder piston rod (17) are hinged via a connecting rod (5); The stopping pawl (8) comprises an upper fulcrum (801) and a lower fulcrum (802). 2. A highly integrated oil cylinder assembly according to claim 1, characterized in that a stop surface (902) is provided in the stop groove (901). 3. A highly integrated cylinder assembly according to claim 1, characterized in that the swing arms (11) are hinged via hinges (14).