CN113636495B - Oil cylinder structure - Google Patents

Oil cylinder structure Download PDF

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Publication number
CN113636495B
CN113636495B CN202111036038.0A CN202111036038A CN113636495B CN 113636495 B CN113636495 B CN 113636495B CN 202111036038 A CN202111036038 A CN 202111036038A CN 113636495 B CN113636495 B CN 113636495B
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CN
China
Prior art keywords
oil
cylinder
oil cylinder
power
master
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202111036038.0A
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Chinese (zh)
Other versions
CN113636495A (en
Inventor
邴常松
李亮
刘汉利
李贺
刘丽敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sino Italian Taida Yingkou Garage Equipment Co ltd
Original Assignee
Sino Italian Taida Yingkou Garage Equipment Co ltd
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Application filed by Sino Italian Taida Yingkou Garage Equipment Co ltd filed Critical Sino Italian Taida Yingkou Garage Equipment Co ltd
Priority to CN202111036038.0A priority Critical patent/CN113636495B/en
Publication of CN113636495A publication Critical patent/CN113636495A/en
Application granted granted Critical
Publication of CN113636495B publication Critical patent/CN113636495B/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/08—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement hydraulically or pneumatically operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
    • B66F7/065—Scissor linkages, i.e. X-configuration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
    • B66F7/28—Constructional details, e.g. end stops, pivoting supporting members, sliding runners adjustable to load dimensions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • F15B15/1452—Piston sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1471—Guiding means other than in the end cap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/149—Fluid interconnections, e.g. fluid connectors, passages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • Actuator (AREA)
  • Forklifts And Lifting Vehicles (AREA)

Abstract

The oil cylinder structure belongs to the technical field of lifters of motor vehicles, and particularly relates to an oil cylinder structure. The invention provides an oil cylinder structure with good use effect. The oil cylinder structure comprises a first oil cylinder (12) and a second oil cylinder (13), and is characterized in that the first oil cylinder (12) is connected with the second oil cylinder (13) in series, and the annular area of a rod cavity of the first oil cylinder (12) is equal to the area of a rodless cavity of the second oil cylinder (13); the oil cylinder comprises a piston (12-3), the piston (12-3) is connected with a piston rod (12-2), and the piston rod (12-2) is connected with the power-assisted claws (28), (28 a); the end face of the piston (12-2) is provided with an oil hole (12-6), the oil hole (12-6) bypasses the outer wall supporting ring (12-12) of the piston (12-2) to be communicated with the outer circular oil guide groove (12-7) of the piston (12-2), and the circumference of the cylinder barrel (12-1) is provided with holes (12-8).

Description

Oil cylinder structure
Technical Field
The invention belongs to the technical field of lifters of motor vehicles, and particularly relates to an oil cylinder structure.
Background
The lifter mainly realizes parallel synchronous motion of two table tops through double cylinders of a main oil cylinder and an auxiliary oil cylinder in series connection and synchronization, and lifts a vehicle to be maintained.
The shearing type lifting machine in the market has various varieties, is suitable for being installed on the ground surface, has small occupied area (the approach bridge for the boarding is short) and is suitable for being used on multiple floors, the demand quantity is increased year by year, and the requirements on the safety and the reliability of the machine are higher and higher. This requires that the product should be continuously upgraded.
Disclosure of Invention
The invention aims at the problems and provides the oil cylinder structure with good use effect.
In order to achieve the purpose, the oil cylinder structure comprises a master main oil cylinder (12) and a master auxiliary oil cylinder (13), and is characterized in that the master main oil cylinder (12) is connected with the master auxiliary oil cylinder (13) in series, and the annular area of a rod cavity of the master main oil cylinder (12) is equal to the area of a rodless cavity of the master auxiliary oil cylinder (13);
the oil cylinder comprises a piston (12-3), the piston (12-3) is connected with a piston rod (12-2), and the piston rod (12-2) is connected with a first power-assisted claw (28) and a second power-assisted claw (28 a); the end face of the piston (12-3) is provided with a first oil hole (12-6), the first oil hole (12-6) bypasses a supporting ring (12-12) on the outer wall of the piston (12-3) and is communicated with an annular oil guide groove (12-7) on the outer circle of the piston (12-3), an oil drainage small hole (12-8) is formed in the circumference of the cylinder barrel (12-1), the oil drainage small hole (12-8) is communicated with the oil guide groove (12-7), the end part of the cylinder barrel (12-1) is arranged in the guide sleeve (12-4), a sealing ring (12-13) is arranged between the inner wall of the guide sleeve (12-4) and the outer wall of the cylinder barrel (12-1), and the sealing ring is arranged in a groove on the inner wall of the guide sleeve (12-4).
As a preferable scheme, the outer wall of the piston (12-3) is provided with an annular groove, a Gelai ring (12-14) is arranged in the annular groove, and the outer end of the Gelai ring (12-14) is contacted with the inner wall of the cylinder barrel (12-1).
As another preferable scheme, the tail end of the cylinder barrel (12-1) is provided with a through hole, and a first joint (12-15) is arranged at the through hole.
As another preferable scheme, the number of the oil drainage holes (12-8) is six, and the oil drainage holes are uniformly distributed along the circumferential direction; the oil drain holes (12-8) are arranged on the outer side of the sealing ring (12-13), an oil passage (12-9) is arranged between the outer circle of the cylinder barrel (12-1) and the inner circle of the guide sleeve (12-4) at the positions of the six oil drain holes (12-8) on the cylinder barrel (12-1), a groove (12-10) is processed on the end face of the inner hole of the guide sleeve (12-4), the groove (12-10) is communicated with the oil passage (12-9), and the groove (12-10) is communicated with a second oil hole (12-11) on the guide sleeve (12-4) and an oil passage of the second joint (12-5).
As another preferable scheme, the invention further comprises a power-assisted anti-overturning component, wherein the power-assisted anti-overturning component comprises a first power-assisted claw (28) and a second power-assisted claw (28 a), the piston rod end of the master main cylinder (12) is provided with the first power-assisted claw (28), the piston rod end of the master auxiliary cylinder (13) is provided with the second power-assisted claw (28 a), and the power-assisted claw is connected with the inner support arm (34) of the lifter through a shaft.
As another preferable scheme, the invention is also provided with a first power-assisted oil cylinder (14) and a second power-assisted oil cylinder (15), the lower end of the power-assisted oil cylinder is connected with the lower end of an inner support arm (34) of the lifting machine in a shaft way, and the upper end of a piston rod of the power-assisted oil cylinder is connected with the upper part of an outer support arm (21) of the lifting machine in a shaft way.
Secondly, the first power assisting claw (28) and the second power assisting claw (28 a) comprise power assisting combined pieces (28-1), a shaft hole (28-9) in the middle of each power assisting combined piece (28-1) is connected with an inner support arm (34) of the lifting machine through a shaft, an upper shaft hole (28-8) of each power assisting combined piece (28-1) is connected with a piston rod earring of a master cylinder (12) of the master station, and a lower shaft hole (28-10) of each power assisting combined piece (28-1) is connected with a power assisting roller (32) through a power assisting roller shaft (28-2), a power assisting spacer (28-3), a shaft sleeve (28-5) and a retainer ring (28-6).
In addition, the invention also comprises a travel switch (30), the travel switch (30) is arranged on the inner side of the inner support arm (34), a long hole with adjustable distance is arranged on the mounting plate, and the roller of the travel switch (30) is matched with the cam surface of the positioning plate (29) on the power assisting component (28-1).
The invention has the beneficial effects that.
According to the oil cylinder structure, automatic oil and gas supplementing and exhausting can be realized when the lifter is lifted to the highest position, and oil supplementing and exhausting can be performed under the condition of carrying load, so that a sealing element is not damaged, the pressure peak value generated at the stroke end of the oil cylinder is prevented, particularly, the auxiliary oil cylinder (a master auxiliary oil cylinder) is easy to generate a supercharging phenomenon, and the synchronous accumulated error of the oil cylinder can be eliminated to level the lifter. When the piston (12-3) of the cylinder at the highest point of the lifting machine is also moved to the end of the guide sleeve (12-4), hydraulic oil can be communicated from the rodless cavity to the rod-provided cavity.
Drawings
The invention is further described below with reference to the drawings and the detailed description. The scope of the present invention is not limited to the following description.
FIG. 1 is a block diagram of a lift cylinder according to the present invention.
Fig. 2 is an enlarged view of a portion C of fig. 1.
FIG. 3 is a block diagram of a guide sleeve of a lift cylinder according to the present invention.
Fig. 4 is a schematic diagram of a hydraulic system of the lift of the present invention.
Figure 5 is a general layout of a lift of the present invention.
Fig. 6 is an enlarged view of the portion N of fig. 5.
Fig. 7 is an enlarged view of fig. 5 with the inner arm removed at N.
Fig. 8 is a diagram of a corner dish structure according to the present invention.
Fig. 9 is a cross-sectional view of a corner disk of the present invention.
Fig. 10 is an exploded view of the corner plate of the present invention.
Fig. 11 is a view showing a structure of the secondary lifting of the present invention.
Fig. 12 is an enlarged view of a portion a of fig. 11.
Fig. 13 is an enlarged view of a portion B of fig. 11.
FIG. 14 is a block diagram of a side slip and sand frame of the present invention.
FIG. 15 is a cross-sectional view of a side slip and sand carrier construction of the present invention.
Fig. 16 is a partial cross-sectional view of the baffle plate (25-13) of fig. 14 taken along line M.
Fig. 17 is a partial cross-sectional view taken in the direction N of the baffle (25-13) of fig. 14.
Fig. 18 is a K-direction view of fig. 14.
FIG. 19 is a block diagram of a side-slip sand frame of the present invention.
FIG. 20 is an exploded view of the side-slip sand frame of the present invention.
Fig. 21 is a diagram of the safety lock structure of the rack bar of the present invention.
Fig. 22 is an exploded view of the rack safety lock of the present invention.
Fig. 23 is a view showing a structure of a lock tooth in the rack bar safety lock of the present invention.
Fig. 24 is a structural view of the booster pawl of the present invention.
Fig. 25 is a schematic view of the relevant part of the lock plate of the present invention.
In the figure, 1 is an oil filter core, 2 is a gear pump, 3 is an inserted manual pump, 4 is a one-way valve, 5 is a pressure gauge, 6 is a master electromagnetic reversing valve, 7 is a slave electromagnetic reversing valve, 8 is a split overflow valve, 9 is an electromagnetic unloading valve, 10 is a pressure compensation throttle valve, 11 is a motor, 12 is a master auxiliary cylinder, 13 is a master auxiliary cylinder, 14 is a first auxiliary cylinder (left auxiliary cylinder), 15 is a second auxiliary cylinder (right auxiliary cylinder), 16 is a slave auxiliary cylinder, 17 is a slave auxiliary cylinder, 18 is a one-way throttle valve, 19 is an explosion-proof valve, 20 is a base, 21 is an outer support arm, 22 is a lifting table, 23 is a secondary lifting structure, 24 is a corner disc, 25 is a sideslip and sand frame structure, 26 is a second rack safety lock structure, 27 is a first rack safety lock structure, 28 is a first auxiliary claw (P1 table auxiliary claw), 28a second auxiliary claw (P2 table auxiliary claw), 29 is a P1 table positioning plate, 29 is P2 table positioning plate, 30 is P1 table P1, 30 is a base plate P1, 30 is a travel sensor, 31 is a travel sensor, and 33 is a travel sensor, and 32 is a travel sensor is a roller.
Detailed Description
As shown in the figure, the oil cylinder structure can be applied to a novel lifting machine, the novel lifting machine comprises a first table top (P1) and a second table top (P2), the first table top (P1) and the second table top (P2) are supported by a cross support arm, the lower end of the cross support arm is arranged on a lifting machine base (20), a main and auxiliary oil cylinder structure and a rack safety lock structure are arranged on the cross support arm, and a piston rod end of the main and auxiliary oil cylinder structure is connected with a power-assisted anti-overturning component;
the front parts of the first table top (P1) and the second table top (P2) are provided with corner plates, the middle parts of the first table top (P1) and the second table top (P2) are provided with secondary lifting structures (23), and the rear parts of the first table top (P1) and the second table top (P2) are provided with sideslips and sand rack structures (25) thereof.
The novel lifting machine rack safety lock structure and the power-assisted anti-overturning component ensure the use safety of the lifting machine.
The front parts of the first table top (P1) and the second table top (P2) of the novel lifting machine are provided with corner plates, so that the lifting machine can perform four-wheel positioning for vehicles.
The main and auxiliary oil cylinder structure (namely the oil cylinder structure of the invention) comprises a main oil cylinder (12) of a main platform and an auxiliary oil cylinder (13) of the main platform, the power-assisted anti-overturning component comprises a first power-assisted claw (28) and a second power-assisted claw (28 a), a piston rod end of the main oil cylinder (12) of the main platform is provided with the first power-assisted claw (28), a piston rod end of the auxiliary oil cylinder (13) of the main platform is provided with the second power-assisted claw (28 a), and the power-assisted claw is connected with an inner support arm (34) of the lifting machine through a shaft. The auxiliary claw structure (28, 28 a) is added at the piston rod end of the main and auxiliary cylinders, so that the initial lifting oil pressure can be reduced, the cylinder diameter design of the main cylinder of the main platform and the auxiliary cylinder (12, 13) of the main platform becomes smaller, and the lifting machine can be designed to be thinner.
The hydraulic lifting device is further provided with a first power-assisted oil cylinder (14) and a second power-assisted oil cylinder (15), the lower end of the power-assisted oil cylinder is connected with the lower end of an inner support arm (34) of the lifting machine in a shaft mode, and the end of a piston rod of the upper end of the power-assisted oil cylinder is connected with the upper portion of an outer support arm (21) of the lifting machine in a shaft mode.
The power-assisted oil cylinder and the main oil cylinder and the auxiliary oil cylinder are of a 4-branch oil cylinder structure, so that the design of the cylinder diameter of the main oil cylinder and the auxiliary oil cylinder can be smaller while the lifting thrust is met, and the lifting machine can be designed to be thinner.
The first power assisting claw (28) and the second power assisting claw (28 a) comprise a power assisting combination piece (28-1), a middle shaft hole (28-9) of the power assisting combination piece (28-1) is connected with an inner support arm (34) of the lifting machine through a shaft, an upper shaft hole (28-8) of the power assisting combination piece (28-1) is connected with a piston rod earring of a master cylinder (12) of the master station, and a lower shaft hole (28-10) of the power assisting combination piece (28-1) is connected with a power assisting roller (32) through a power assisting roller shaft (28-2), a power assisting spacer (28-3), a shaft sleeve (28-5) and a retainer ring (28-6). The positioning plate (29) is welded on the power assisting assembly (28-1) and is used for realizing detection and early warning when the first power assisting claw (28) and the second power assisting claw (28 a) are overturned.
The device also comprises a travel switch (30), wherein the travel switch (30) is arranged on the inner side of the inner support arm (34), a long hole with adjustable distance is formed in the mounting plate, and a roller of the travel switch (30) is matched with a cam surface of a positioning plate (29) on the power assisting component (28-1). When the first power assisting claw (28) turns over, the cam surface of the positioning plate (29) triggers the roller of the travel switch (30) to send out a signal. The travel switch (30) is used as a power assisting claw overturning detection switch and has a power assisting overturning prevention detection function. The lifting device is used for preventing the danger of independent descending of the other table top when an obstacle exists below the single table top of the lifting machine, and ensuring the safe and reliable work of the lifting machine. The distance between the roller of the travel switch (30) and the cam surface of the positioning plate (29) on the power assisting assembly (28-1) can be adjusted, so that when the first power assisting claw (28) turns over, the cam surface of the positioning plate (29) triggers the roller of the travel switch (30) to send out a signal.
The rack safety lock structure comprises a first rack safety lock structure (27) and a second rack safety lock structure (26), wherein the first rack safety lock structure (27) is arranged on the outer side of the first power-assisted oil cylinder (14), and the second rack safety lock structure (26) is arranged on the outer side of the second power-assisted oil cylinder (15). The safety lock structure of the racks (26, 27) is arranged outside the power-assisted cylinders (14, 15), so that the structure is compact, and the lifting machine can be designed to be thinner.
The rack safety lock structure comprises a rack closing piece (26-8), an upper shaft hole of the rack closing piece (26-8) is connected with an upper supporting lug of an outer supporting arm (21) of the lifting machine, a lock box seat closing piece (26-9) is connected with a lower supporting lug of an inner supporting arm (34) of the lifting machine, the rack and rack closing piece (26-8) is arranged in the lock tooth box closing piece (26-1), the lock tooth box closing piece (26-1) is connected with the lock box seat closing piece (26-9) through a screw (26-10), a lock tooth (26-2) is connected with the tooth box closing piece (26-1) through a lock shaft (26-3), a lock tooth limiting plate (26-12) is arranged on the lock tooth (26-2) through a screw (26-15), and two ends of a tension spring (26-16) are respectively connected with the lock tooth limiting plate (26-12) and an upper end welding plate of the lock tooth box closing piece (26-1) to provide downward reset lock teeth for the lock tooth (26-2); the cylinder (26-5) is arranged on the tooth box assembly (26-1) through a screw (26-7) and a gasket (26-6), the cylinder (26-5) is ventilated and then is unlocked by pushing the locking teeth (26-2) upwards against the tension force of the tension spring (26-16), the locking switch bracket (26-13) is arranged on a locking seat (26-18) welded on the locking tooth box assembly (26-1) through a screw (26-15), and the proximity switch (26-14) is fixed on the locking switch bracket (26-13) through a self-contained nut; a screw (26-4) is screwed on the telescopic rod at the upper end of the air cylinder (26-5) (the screw (26-4) is used for adjusting the distance between the air cylinder (26-5) rod and the locking teeth (26-2), so that the air cylinder rod can fully jack the locking teeth), and a retainer ring (26-11) is arranged at the end part of the locking shaft (26-3); the rear lower end of the lock tooth (26-2) is provided with a downward lock tongue (26-17).
The locking teeth (26-2) in the locking tooth structure are not supported by the side edges of square holes of the locking tooth box fitting piece (26-1), but force is transmitted to the locking shaft (26-3) by a connecting plate which is thickened, and then the force is transmitted to a lock seat (26-18) welded on the locking tooth box fitting piece (26-1) by the locking shaft (26-3). This structure is very reliable.
The lifting machine has a safety lock tooth synchronous detection function, and can lock teeth when the lock teeth of the two table tops are in the same tooth position and the tooth tongues are in the racks, so that the lifting machine is safer and more reliable to use.
The rack and rack assembly (26-8) is lifted and contracted along with the lifter in the lock tooth box assembly (26-1), and the cylinder (26-5) is ventilated and then is jacked to the lock tooth (26-2) to unlock against the pulling force of the tension spring (26-16).
The corner disc (24) comprises a rotary disc (24-5), the rotary disc (24-5) is arranged on the base (24-3), and a bead disc (24-4) is arranged between the rotary disc (24-5) and the base (24-3).
The middle part of the upper end of the base (24-3) is provided with an annular boss, the outer side of the annular boss is sleeved with a bead disc (24-4), the upper end of the bead disc (24-4) is provided with a rotary disc (24-5), the middle part of the rotary disc (24-5) is penetrated with a countersunk head screw (24-6), the lower end of the countersunk head screw (24-6) is screwed into a threaded hole in the middle part of the floating sleeve (24-1), and a baffle (24-2) is arranged between the upper end face of the floating sleeve (24-1) and the lower end face of the base (24-3). The baffle sheet (24-2) is added to reduce the outer diameter of the floating sleeve (24-1) and ensure the rotation range of the floating sleeve in the base (24-3); the turntable (24-5) can be formed by pressing with a mould, and is as thin as possible on the premise of meeting the strength.
Rubber cushion blocks (24-11) (the rubber cushion blocks (24-11) are arranged on two sides of the base (24-3) and used for filling the height difference between the turntable (24-5) and the base (24-3) so that the trolley is more stable when being arranged on the upper corner plate and the lower corner plate), arc-shaped grooves corresponding to the turntable (24-5) are formed in the inner sides of the rubber cushion blocks (24-11), strip-shaped grooves are formed in the lower ends of the outer sides of the rubber cushion blocks (24-11), mounting groove plates (24-15) are arranged in the strip-shaped grooves, mounting holes are formed in the mounting groove plates (24-15), and screws (24-7) penetrate through the mounting holes and the gaskets (24-8) to be screwed into nuts (24-9) (are connected with the lifting table-board 22 through the screws (24-7)).
The two sides of the front end of the rotary table (24-5) are provided with insertion holes, the rear end of the fixed pin assembly (24-14) is inserted into the insertion holes, the front end of the fixed pin assembly (24-14) is provided with threaded holes, the screw (24-10) penetrates through the rear end hole of the L-shaped clamping plate (24-12) to be screwed into the threaded holes, the rear end of the plastic-coated steel wire rope penetrates through the front end hole of the clamping plate (24-12) and is provided with a limiting block, and the front end of the plastic-coated steel wire rope (24-13) is provided with an annular sheet. The arrangement of the plastic-coated wire rope and the annular piece prevents the fixed pin assembly 24-14 from being lost.
The front end of the base (24-3) is turned upwards, threaded holes are formed in two sides of the turning-up part, and screws (24-10) are screwed into the threaded holes (annular sheets used for fixedly connecting the front ends of the plastic-coated steel wires (24-13)).
The turntable (24-5) slides and rotates on the bead disc (24-4), and the turntable (24-5) of the corner disc can transversely move in the middle groove of the base (24-3) and is suitable for vehicle types with different wheel tracks. The floating sleeve (24-1) is connected with the rotary table (24-5) through countersunk screws (24-6) and slides or rotates along with the rotary table (24-5), and the sliding and rotating range is limited by a middle groove (a groove below the annular boss) of the base (24-3). The base (24-3) is a sleeve welding structure (namely, a hollow round sleeve is welded in the middle of the square plate).
The height of the corner disc (24) is 18mm, and the rotation range of the turntable (24-5) of the corner disc is phi 84mm (namely, the rotation range can reach any position in a phi 84mm circle).
The secondary lifting structure (23) comprises a sub-platform outer support arm assembly (23-20) and a sub-platform inner support arm assembly (23-28), wherein the cross sections of support arms in the sub-platform outer support arm assembly (23-20) and the sub-platform inner support arm assembly (23-28) are rectangular structures, and sub-platform table plate assemblies (23-29) are arranged at the upper ends of the sub-platform outer support arm assembly (23-20) and the sub-platform inner support arm assembly (23-28);
a piston rod of the sub-platform main oil cylinder (16) is connected with a sub-platform inner support arm assembly (23-28) through a sub-platform oil cylinder upper shaft (23-9), and a cylinder head end of the sub-platform main oil cylinder (16) is connected with a sub-platform outer support arm assembly (23-20) through a sub-platform oil cylinder lower shaft (23-14).
The secondary lifting structure can be independently assembled on the lifting table top, so that the user can conveniently select and use the secondary lifting structure.
The outer support arm assembly (23-20) of the sub-platform is connected with the fixed seat (23-33) through a shaft head at the lower end, and the fixed seat (23-33) is connected with the main platform surface through a screw hole at the lower end of the fixed seat; so that the whole secondary lifting structure and the main table surface can be disassembled and assembled.
The middle part of the support arm assembly (23-20) outside the sub-platform is connected with the middle part of the support arm assembly (23-28) inside the sub-platform through a shaft hole, a bolt (23-18) and a locking round nut (23-19); the upper end of the sub-platform main oil cylinder (16) is connected with the upper part of the sub-platform inner support arm assembly (23-28) through a shaft hole, a shaft sleeve (23-13) and a screw (23-8) (for positioning the shaft, preventing the shaft from moving), the upper shaft (23-9) of the sub-platform oil cylinder and the shaft sleeve (23-10), the lower end of the sub-platform main oil cylinder (16) is connected with the lower end of the sub-platform outer support arm assembly (23-20) through the shaft hole, the shaft sleeve (23-15), the screw (23-17) and the lower shaft (23-14) of the sub-platform oil cylinder, and the upper end of the sub-platform outer support arm assembly (23-20) is connected with the sub-platform upper sliding block (23-21) through the shaft hole and the shaft sleeve (23-15).
The secondary lifting is realized by designing the cross sections of the support arms in the outer support arm combination piece (23-20) and the inner support arm combination piece (23-28) of the sub-platform for scissor lifting into a rectangular structure, and the secondary lifting is thinner on the premise of meeting the structural strength.
Draw grooves with square cross sections are formed in two sides of the sub-table plate closing piece (23-29), draw rods matched with the draw grooves are formed in two sides of the draw closing piece (23-3), a limiting plate (23-1) is arranged at the front end of the draw rods, the limiting plate (23-1) is arranged in a limiting sliding groove at the front end of the draw rods, an upper protruding rod is arranged at the upper end of the limiting plate (23-1), a pressure spring (23-2) is sleeved outside the upper protruding rod, the upper end of the pressure spring (23-2) abuts against the upper end face of the limiting sliding groove, the lower end of the pressure spring (23-2) abuts against the upper end face of the limiting plate (23-1), the lower end of the limiting sliding groove is opened, an inclined plane is formed in the lower end of the limiting plate (23-1), a top plate is arranged at the rear upper end of the draw closing piece (23-3), a screw (23-4) penetrates through a hole in the draw closing piece (23-34), and a round hole (23-35) is formed in the rear end of the bottom face of the draw groove, corresponding to the limiting plate (23-1) and the screw (23-4);
the drawing and closing piece (23-3) can be drawn relative to the sub-table plate closing piece (23-29), the pressure spring (23-2) pushes the limiting plate (23-1) to be clamped in a round hole (23-35) formed in the bottom of the square hole end of the side edge of the sub-table plate closing piece (23-29), the inclined surface on the limiting plate (23-1) is inwards convenient for the inward pushing and installation of the drawing and closing piece (23-3), and when the drawing and closing piece (23-3) is pushed onto the table plate closing piece (23-29), the lower end nut of the screw (23-4) falls into the hole of the table plate closing piece (23-29). The screw (23-4) cap can be pulled out from the hole of the platen assembly (23-29) by pulling the nut piece (23-34) upwards.
The sub-table plate assembly (23-29) is internally provided with a drawing square hole, the drawing assembly (23-3) can be drawn in the drawing assembly, vehicles with different wheelbases can be lifted by a machine, a limit plate (23-1) and a pressure spring (23-2) are arranged in a welding groove at the support arm end of the drawing assembly (23-3), when the drawing assembly is drawn outwards, the pressure spring (23-2) pushes the limit plate (23-1) to be clamped in a round hole (23-35) at the bottom of the square hole end at the side edge of the sub-table plate assembly (23-29), and the transition drawing of the drawing assembly (23-3) is prevented, so that an inclined plane on the limit plate (23-1) is inwards convenient for the inward pushing installation of the drawing assembly (23-3). The screw (23-4) passes through the hole on the support arm of the drawing and pulling assembly (23-3) to be screwed on the nut piece (23-34), when the drawing and pulling assembly (23-3) is pushed onto the platen assembly (23-29), the lower end nut cap of the screw (23-4) falls into the hole of the platen assembly (23-29) to play a role of fixing the drawing and pulling assembly (23-3) so as to prevent the movement, and when the drawing and pulling assembly is needed, the nut piece (23-34) can be lifted upwards to pull out the nut cap of the screw (23-4) from the hole of the platen assembly (23-29) and then outwards.
The secondary lifting structure (23) is provided with a pneumatic unlocking structure, the pneumatic unlocking structure comprises a lock base plate (23-22) and a lock plate (23-27), mounting holes are formed in the periphery of the lock base plate (23-22), the lock plate (23-27) is connected with the lower end of a support arm assembly (23-28) in the sub-platform through a support shaft (23-26), and sliding blocks (23-25) are arranged at two ends of the support shaft (23-26); the thin type air cylinder (23-30) is arranged on the lock plate (23-27), the lock bottom plate (23-22) is provided with a sliding limit frame (23-40), and the fulcrum shaft (23-26) passes through the sliding limit frame (23-40) and the thin sliding blocks (23-23) on two sides of the sliding limit frame (23-40); the upper end of the support arm assembly (23-28) in the sub-platform is connected with the rear end of the drawing assembly (23-3) through a shaft hole, an upper shaft (23-5) of the support arm in the sub-platform, a shaft sleeve (23-6) and a retainer ring (23-7); the lower end of the thin cylinder (23-30) is provided with a cylinder sleeve (23-12); the end part of the fulcrum shaft (23-26) is provided with a retainer ring (23-24), the lower end of the thin cylinder (23-30) is connected with the locking plate (23-27) through a screw (23-31), and the end part of the telescopic rod of the thin cylinder (23-30) is screwed with a screw (23-32); the front end of the lock plate (23-27) is provided with a lock shaft (23-50), and a tooth block (23-51) is arranged on the lock bottom plate (23-22) behind the lock shaft (23-50).
The thin cylinder (23-30) is screwed with a flat-head silencer (23-11) (the part is an outsourcing part and is a pneumatic general silencing device, and is a sintered material, and air passes through a honeycomb gap in the part to achieve silencing effect).
Sliding and lifting on the main table surface through sliding blocks (23-25) at two ends of the supporting shaft (23-26); when the thin air cylinder (23-30) is ventilated, the lock plate (23-27) is driven to rotate around the support shaft (23-26) to unlock the lock (the lock shaft (23-50) at the front end of the lock plate (23-27) is lifted and then is higher than the tooth block (23-51) on the lock bottom plate (23-22)). The cylinder sleeve (23-12) is arranged on the piston rod at the lower end of the thin cylinder (23-30) by using screws, and the cylinder sleeve (23-12) slides on the lock bottom plate (23-22). When the locking teeth are needed for secondary lifting, when the thin air cylinder (23-30) is exhausted, the front end of the locking plate (23-27) descends, the supporting shaft (23-26) drives the locking shaft (23-50) on the 23-27 to slide forwards (namely, to the left side in FIG. 11) towards the tooth block (23-51), and the rear side of the locking shaft (23-50) leans against the front locking teeth of the tooth block (23-51).
The secondary lifting lock tooth structure is thin, the lock plate (23-27) is connected with the thin air cylinder (23-30) in a compact structure, and the lock plate and the main table surface are of detachable structures, so that the lock tooth structure is convenient to select and install.
The sideslip and sand frame structure (25) comprises a sideslip base plate assembly (25-1), and the sideslip base plate assembly (25-1) is fixed on a main table surface of the lifting machine by screws through holes at four corners of the sideslip base plate assembly;
the side sliding plate (25-5) is inserted into a hole on the corner of the side sliding bottom plate assembly (25-1) through a fixing pin assembly (25-6), and the fixing pin assembly (25-6) is connected with the main table surface through a clamping plate (25-7), a screw (25-9) and a plastic-coated steel wire rope. The plastic-coated steel wire rope (25-8) is used for preventing the fixed pin assembly (24-14) from being lost, and the fixed pin assembly (25-6) is pulled out before four-wheel positioning is performed when the vehicle is started on the lifting machine.
The middle part of the side sliding plate (25-5) is provided with a hole, a screw (25-12) penetrates through the hole, a bottom plate assembly (25-1) and the side sliding block (25-11) to be screwed on the side sliding pin shaft (25-10), the bottom plate assembly (25-1) is provided with a square frame (25-1-2) with a shoulder, and the side sliding block (25-11) is arranged in the square frame (25-1-2);
the sideslip pin shaft (25-10) penetrates through a strip-shaped hole on the sideslip slide block (25-11), the lower ends of two sides of the sideslip slide block (25-11) extend outwards to form a stop block (25-50), the inner wall of the upper end of the shoulder is provided with a baffle plate (25-13) extending towards the middle, and the upper end face of the stop block (25-50) and the lower end face of the baffle plate are matched faces.
The sliding of the side sliding plate (25-5) is realized by two holes in the middle, screws (25-12) penetrate through the side sliding plate (25-5) side sliding bottom plate assembly (25-1) and the side sliding block (25-11) to be screwed on the side sliding pin shaft (25-10), the side sliding pin shaft (25-10) can longitudinally slide in the side sliding block (25-11) by utilizing shoulders, and the side sliding block (25-11) can transversely slide in a square frame (25-1-2) with the shoulders of the side sliding bottom plate assembly (25-1). This ensures the full-directional sliding of the side sliding plate (25-5).
The side-slip bottom plate assembly (25-1) is provided with a side-slip sand frame (25-2), nylon balls (25-3) are arranged on the side-slip sand frame (25-2), the side-slip sand frame (25-2) is arranged between the side-slip plate (25-5) and the side-slip bottom plate assembly (25-1), the side-slip bottom plate assembly (25-1) is provided with an annular groove (25-40), and nylon balls (25-3) are arranged in the annular groove (25-40). The nylon balls (25-3) are used to support the sliding motion of the side sliding plate (25-5).
The sideslip sand rack (25-2) is used for supporting the sliding motion of the side sliding plate (25-5), six ring grooves (25-40) can be welded on the sideslip bottom plate assembly (25-1), and 3 nylon balls (25-3) are placed in each ring groove (25-40) to increase the supporting area of the side sliding plate.
Four sideslip sand frames (25-2) are arranged transversely, and each sideslip sand frame (25-2) is fixed on the sideslip base plate assembly (25-1) through 2 screws (25-4).
The side-slip sand rack (25-2) comprises a Chinese character 'ri' -shaped sliding rack (25-2-1), a plurality of nylon ball placement holes are uniformly distributed on the sliding rack (25-2-1), a pull ring (25-2-2) is arranged in the middle of an opening of the side-slip sand rack (25-2), and the pull ring (25-2-2) is connected with the sliding rack (25-2-1) through a tension spring (25-2-3).
The number of the sliding frames (25-2-1) is two, the two sliding frames (25-2-1) are arranged in a buckling manner, each pull ring (25-2-2) is connected with four tension springs (25-2-3), and twenty nylon balls (25-2-5) are arranged; one sliding frame (25-2-1) is provided with a column base (25-2-6), the other sliding frame (25-2-1) is provided with a round hole corresponding to the column base (25-2-6), and the other end of the tension spring (25-2-3) is connected with the sliding frame (25-2-1) through a screw (25-2-4).
20 nylon balls (25-2-5) are placed in the circular groove through 2 sliding frames (25-2-1), and then a plurality of pylons (25-2-6) on one sliding frame (25-2-1) are embedded into circular holes on the other sliding frame; one end of each tension spring (25-2-3) is connected with a hole of the pull ring (25-2-2), and the other end is fixedly connected with a screw (25-2-4) arranged on a square 4-angle hole of the sliding frame (25-2-1). Thus, after the side sliding plate (25-5) slides under the sliding force of the vehicle, the side sliding plate (25-5) can be reset by the pulling force of the tension spring (25-2-3) under the condition that the vehicle is lifted and has no load.
The travel switch (30) is arranged on the inner support arm (34) through a mounting plate, and a long hole with adjustable distance is arranged on the mounting plate. The long hole can adjust the distance between the roller of the travel switch (30) and the cam surface of the locating plate (29) on the power assisting combination piece (28-1).
The master cylinder (12) is connected with the slave cylinder (13) in series, and the annular area of the rod cavity of the master cylinder (12) is equal to the area of the rodless cavity of the slave cylinder (13).
The master cylinder (12) comprises a piston (12-3), the piston (12-3) is connected with a piston rod (12-2), and the piston rod (12-2) is connected with a first power-assisted claw (28) and a second power-assisted claw (28 a); the end face of the piston (12-3) is provided with a first oil hole (12-6), the first oil hole (12-6) bypasses a supporting ring (12-12) on the outer wall of the piston (12-3) and is communicated with an annular oil guide groove (12-7) on the outer circle of the piston (12-3), an oil drainage small hole (12-8) is formed in the circumference of the cylinder barrel (12-1), the oil drainage small hole (12-8) is communicated with the oil guide groove (12-7), the end part of the cylinder barrel (12-1) is arranged in the guide sleeve (12-4), a sealing ring (12-13) is arranged between the inner wall of the guide sleeve (12-4) and the outer wall of the cylinder barrel (12-1), and the sealing ring is arranged in a groove on the inner wall of the guide sleeve (12-4).
According to the oil cylinder structure, automatic oil supplementing and air exhausting can be realized when the lifter is lifted to the highest position, and oil supplementing and air exhausting can be performed under the condition of carrying load, so that a sealing element is not damaged, the pressure peak value generated at the stroke end of the oil cylinder is prevented, particularly, the auxiliary oil cylinder (a master auxiliary oil cylinder) is easy to generate a supercharging phenomenon, and the synchronous accumulated error of the oil cylinder can be eliminated to level the lifter.
When the piston (12-3) of the cylinder at the highest point of the lifting machine is also moved to the end of the guide sleeve (12-4), hydraulic oil can be communicated from the rodless cavity to the rod-provided cavity.
The outer wall of the piston (12-3) is provided with an annular groove, a Gelai ring (12-14) is arranged in the annular groove, and the outer end of the Gelai ring (12-14) is contacted with the inner wall of the cylinder barrel (12-1).
The tail end of the cylinder barrel (12-1) is provided with a through hole, a first joint (12-15) is arranged at the through hole (the first joint (12-15) is used for connecting an oil pipe, and both ends of the first joint are threaded).
The number of the oil drainage holes (12-8) is six, and the oil drainage holes are uniformly distributed along the circumferential direction; the oil drain holes (12-8) are arranged on the outer side of the sealing ring (12-13), an oil passage (12-9) is arranged between the outer circle of the cylinder barrel (12-1) and the inner circle of the guide sleeve (12-4) at the positions of the six oil drain holes (12-8) on the cylinder barrel (12-1), a groove (12-10) is processed on the end face of the inner hole of the guide sleeve (12-4), the groove (12-10) is communicated with the oil passage (12-9), and the groove (12-10) is communicated with a second oil hole (12-11) on the guide sleeve (12-4) and an oil passage of the second joint (12-5).
The master cylinder (12) structure of the master table can be applied to the slave cylinder (13) of the master table.
The gear pump (2) in the power unit is used for supplying oil and high-pressure oil to push the piston (12-3) of the oil cylinder, and the piston rod (12-2) connected with the piston pushes the first power assisting claw (28) and the second power assisting claw (28 a) to push the lifter support arm (34) so as to enable the lifter to ascend.
The hydraulic oil of the rodless cavity of the master auxiliary cylinder (13) is provided by the rodless cavity of the master main cylinder (12).
The annular area of the rod cavity of the master cylinder (12) is equal to the area of the rodless cavity of the slave cylinder (13) so as to realize the serial synchronous lifting of the first table top (P1) and the second table top (P2). After the oil supplementing and exhausting are completed, the hydraulic oil quantity in a rod cavity of the master platform main oil cylinder (12), a rodless cavity of the master platform auxiliary oil cylinder (13) and a connecting oil way is basically unchanged, so that the synchronous operation of the first table top (P1) and the second table top (P2) can be ensured.
The middle part of the inner support arm (34) is provided with inclination angle sensors (31, 31 a), detection signal output ports of the inclination angle sensors (31, 31 a) are connected with detection signal input ports of a controller, and control signal output ports of the controller are connected with control signal input ports of the leveling electromagnetic valve (6 a).
The inclination sensor is added, and under the cooperation of the electromagnetic valve of the hydraulic system, the two table tops can be synchronously detected at all times, oil leakage and leveling can be automatically supplemented at all times, synchronous operation of the two table tops is ensured, and the leveling precision is higher.
Although the hydraulic oil drainage channel at the stroke end of the oil cylinder can be used for leveling the lifting machine in the scheme, due to the manufacturing precision of the oil cylinder and the frame, micro leakage of hydraulic oil in the full stroke lifting process from the bottom to the high point after the lifting machine is used for a period of time, and other reasons, synchronization errors exceeding the precision requirement can occur.
In order to solve the problems, the middle part of the inner support arm (34) of each table top (P1, P2) of the lifter is provided with the tilt angle sensor (31, 31 a), the precision is 0.02 DEG, and the lifting stroke precision is less than 0.5mm, so that the use requirement can be met; the height difference value of the two tables P1 and P2 is determined by the inclination angle sensor (31 and 31 a) and the change of the initial lowest level horizontal plane angle, a signal is provided for a control system of the power unit, and then a leveling electromagnetic valve (6 a) of the power unit is controlled to be opened and closed to synchronously level the tables all the time.
The hydraulic inlets of the leveling electromagnetic valve (6 a), the sub-platform electromagnetic directional valves (7) (7 a) and the mother platform electromagnetic directional valve (6) are respectively connected with the pressure gauge (5), the outlet of the plug-in manual pump (3), the outlet of the tubular plug-in one-way valve (4) and the outlet of the plug-in electromagnetic unloading valve (9), the outlet inlet of the plug-in manual pump (3) is respectively connected with one end of the oil filter core (1), one end of the split overflow valve (8) and one end of the pressure compensation throttle valve (10), the other end of the oil filter core (1) is respectively connected with the inlet of the tubular plug-in one-way valve (4) and the other end of the split overflow valve (8) through the gear pump (2), and the other end of the pressure compensation throttle valve (10) is connected with the inlet of the plug-in electromagnetic unloading valve (9);
The hydraulic outlet of the leveling electromagnetic valve (6 a) is connected with the oil inlet of the auxiliary oil cylinder (13) of the master platform through an explosion-proof valve (19), the hydraulic outlet of the auxiliary electromagnetic reversing valve (7) is connected with the oil inlet of the main oil cylinder (16) of the master platform through a one-way throttle valve (18), the hydraulic outlet of the auxiliary electromagnetic reversing valve (7 a) is connected with the oil inlet of the auxiliary oil cylinder (17) of the master platform through the one-way throttle valve (18), the oil outlet of the main oil cylinder (16) of the master platform is connected with the hydraulic outlet of the auxiliary electromagnetic reversing valve (7 a), the hydraulic outlet of the electromagnetic reversing valve (6) of the master platform is connected with the oil inlet of the main oil cylinder (12) of the master platform through the explosion-proof valve (19), and the oil outlet of the main oil cylinder (12) of the master platform is connected with the hydraulic outlet of the leveling electromagnetic valve (6 a); the hydraulic outlet of the master electromagnetic directional valve (6) is respectively connected with the oil inlet of the left power-assisted oil cylinder (14) and the oil inlet of the right power-assisted oil cylinder (15), and the oil outlet of the right power-assisted oil cylinder (15) is respectively connected with the oil outlet of the master auxiliary oil cylinder (13), the oil filtering core (1), the oil outlet of the power-assisted oil cylinder (14) and the oil outlet of the auxiliary oil cylinder (17).
When lifting a vehicle, the motor (11) drives the hydraulic pump (2) to suck hydraulic oil through the oil filtering core (1), the pump outputs high-pressure hydraulic oil to open the one-way valve (4), the hydraulic oil enters the rodless cavity of the master cylinder (12) of the master platform through the opened master electromagnetic reversing valve (6) of the master platform, the hydraulic oil with the rod cavity is conveyed to the rodless cavity of the slave cylinder (13) of the master platform through the explosion-proof valve (19) in the piston lifting process of the master cylinder (12) of the master platform, the lifting actions of the two platforms can be synchronously performed because the rod cavity area of the master cylinder (12) of the master platform is equal to the rodless cavity area of the slave cylinder (13) of the master platform, and the left booster cylinder (14) and the right booster cylinder (15) are also participated in the lifting actions through the master electromagnetic reversing valve (6) of the master platform.
When the lifter descends, the electromagnetic unloading valve (9) and the master station electromagnetic reversing valve (6) are simultaneously electrified to be opened, the first table top P1 and the second table top P2 transmit force to a piston rod of the master station master cylinder (12) and a piston rod (12-2) of the master station auxiliary cylinder (13) under the action of dead weights of vehicles and machines, the piston rod (12-2) pushes the piston (12-3), the master station auxiliary cylinder (13) returns hydraulic oil to a rod cavity of the master station master cylinder (12) through the piston (12-3), and the master station master cylinder (12) presses hydraulic oil back to an oil tank through the master station electromagnetic reversing valve (6), the electromagnetic unloading valve (9) and the pressure compensation throttle valve (10) through the piston (12-3). At the moment, the left power-assisted oil cylinder (14) and the right power-assisted oil cylinder (15) also participate in descending through the master electromagnetic directional valve (6).
The ascending and descending processes of the sub-platform main oil cylinder (16) and the sub-platform auxiliary oil cylinder (17) of the secondary lifting structure (23) are similar to those of the main platform, and only the sub-platform electromagnetic reversing valve (7) is required to be opened to open an oil way.
The lifting machine consists of two table tops P1 and P2, wherein each table top mainly consists of a base (20), an inner support arm (34), an outer support arm (21), a first power assisting claw (28) or a second power assisting claw (28 a), a rack (26 or 27), a main oil cylinder (12) of a main table, a secondary oil cylinder (13) of the main table, a left power assisting oil cylinder (14), a right power assisting oil cylinder (15), a lifting table top (22), a secondary lifting structure (23), a corner disc (24), a sideslip and sand frame structure (25) of the sideslip, a main oil cylinder (16) of a sub table and a secondary oil cylinder (17) of the sub table.
The lifting machine is used for the first installation, the lifting machine is lifted to the highest point by utilizing the oil drain channels (lifting machine) in the main oil cylinder (12) of the mother platform and the auxiliary oil cylinder (13) of the mother platform, the first oil hole (12-6) and the outer circular oil guide groove (12-7) on the piston (12-3) are utilized, 6 oil drain holes (12-8) designed on the circumference of the cylinder barrel (12-1) are introduced into an oil channel (12-9) between the outer circle of the cylinder barrel (12-1) and the inner circle of the guide sleeve (12-4), the oil drain channels pass through a groove (12-10) on the guide sleeve (12-4) and a second oil hole (12-11) on the guide sleeve (12-4), the oil drain channels are reconnected to a rodless cavity of the auxiliary oil cylinder (13) of the mother platform by a second connector (12-5), the flow-through process in the auxiliary oil cylinder (13) of the mother platform is the same as that of the main oil cylinder (12), a series of oil channels on the cylinder barrel (12-3), the cylinder barrel (12-1) and the guide sleeve (12-4) are also utilized, the final air channels are pushed to the power oil channels in the power oil tank (P) and the power oil tank (P) simultaneously and the power oil tank (P) are continuously discharged to the power oil tank (2), and (3) carrying out oil supplementing and exhausting of the hydraulic system and synchronous leveling operation of the lifting table top (22).
When the main platform of the lifting machine and the secondary lifting are at the lowest point, the vehicle starts to run from the approach bridge at the right end of the lifting machine to the lifting platform surface (22), and the front wheel runs to the corner disc (24).
According to a hydraulic system schematic diagram of the lifter, when a vehicle is lifted, a hydraulic pump (2) sucks hydraulic oil through an oil filter core (1), a pump outputs high-pressure hydraulic oil to open a one-way valve (4), the hydraulic oil enters a rodless cavity of a master cylinder (12) of a master station through an explosion-proof valve (19) through an opened master station electromagnetic reversing valve (6), hydraulic oil with a rod cavity is conveyed to the rodless cavity of a slave cylinder (13) through the explosion-proof valve (19) in the rising process of a piston of the master cylinder (12), and rising actions of two tables can be synchronously performed because the rod cavity area of the master cylinder (12) of the master station is equal to the rodless cavity area of the slave cylinder (13) of the master station.
The piston rod of the master platform main oil cylinder (12) and the piston rod of the master platform auxiliary oil cylinder (13) respectively push the first assistance claw (28) and the second assistance claw (28 a) to perform an initial assistance lifting process, at the moment, the left assistance oil cylinder (14) and the right assistance oil cylinder (15) also participate in lifting actions through the master platform electromagnetic reversing valve (6), the middle shaft of the assistance claws (28, 28 a) drives the inner support arms (34) to swing and support the lifting table top (22) to lift upwards, and when the assistance assembly (28-1) of the assistance claws (28, 28 a) is lifted to a certain height, the two side vertical plates are contacted with the transverse plates (35) welded in the middle of the inner support arms (34), and the assistance lifting process is ended to continue lifting.
Hydraulic oil with rod cavities of the auxiliary oil cylinder (13) of the master platform, the left power-assisted oil cylinder (14) and the right power-assisted oil cylinder (15) returns to the power unit oil tank along with the rising of the lifting machine.
The ascending process of the sub-platform main oil cylinder (16) and the sub-platform auxiliary oil cylinder (17) of the secondary lifting structure (23) is similar to that of the main platform, and only the sub-platform electromagnetic directional valve (7) is opened to open an oil way, so that the ascending process of the support arm does not have assistance.
If one oil cylinder in the first table top P1 and the second table top P2 rises to the highest point in advance, so that the oil drainage channel of the oil cylinder is communicated, the oil in the rodless cavity of the other oil cylinder flows back to the oil tank no matter the main oil cylinder and the auxiliary oil cylinder rise, the supercharging phenomenon is avoided, and the slow oil cylinder rises to the highest point and can also play a leveling role in eliminating accumulated errors.
In the lifting process of the lifting machine, the tilt angle sensors (31, 31 a) are utilized to automatically eliminate the accumulated leveling error of the hydraulic system, when the second table top (P2) is lower than the first table top (P1), the PC board can give an instruction to the leveling electromagnetic valve according to the data comparison of the two tilt angle sensors (31, 31 a), and the leveling electromagnetic valve (6 a) is opened to perform oil supplementing leveling on the auxiliary oil cylinder (13) of the mother table.
When the vehicle is to be lifted down, the electromagnetic unloading valve (9) and the master station electromagnetic reversing valve (6) are simultaneously electrified to be opened, the first table top P1 and the second table top P2 transmit force to a piston rod of the master station master cylinder (12) and a piston rod (12-2) of the master station auxiliary cylinder (13) under the action of the dead weight of the vehicle and the machine, the piston rod (12-2) pushes the piston (12-3), the master station auxiliary cylinder (13) returns hydraulic oil to a rod cavity of the master station master cylinder (12) through the piston (12-3), and the master station master cylinder (12) presses hydraulic oil back to an oil tank through the master station electromagnetic reversing valve (6), the electromagnetic unloading valve (9) and the pressure compensation throttle valve (10) through the piston (12-3). At the moment, the left power-assisted oil cylinder (14) and the right power-assisted oil cylinder (15) also participate in descending through the master electromagnetic directional valve (6).
The descending process of the lifting mother platform is simultaneously accompanied with the lock tooth detection and unlocking processes of the second rack safety lock structure (26) and the first rack safety lock structure (27), and only the cylinder (26-5) is opened by pushing the lock tooth (26-2) against the pulling force of the tension spring (26-16) after high-pressure gas is introduced. Meanwhile, the two proximity switches (26-14) respectively detect the lock tooth limiting plates (26-12) to determine whether the lock bolts (26-17) (protruding parts) of the lock teeth (26-2) are jacked up or not, and transmit signals to the control system, if any 1 lock tooth (26-2) lock bolts (26-17) are not lifted up, the lifting machine is not lowered, and the vehicle is prevented from being overturned.
The rod cavity of the auxiliary cylinder (13), the rod cavities of the left power cylinder (14) and the right power cylinder (15) of the master station suck hydraulic oil back from the oil tank of the power unit in the descending process. The hydraulic oil has the function of lubricating the cylinder barrel of the oil cylinder, and prevents the cylinder barrel from being rusted by moist air when the equipment is stopped for a long time.
The descending process of the sub-platform main oil cylinder (16) and the sub-platform auxiliary oil cylinder (17) of the secondary lifting structure (23) is similar to the descending process of the main platform, and only the sub-platform electromagnetic reversing valve (7) is required to be opened to open an oil way.
If the lifting machine locks teeth, the lifting machine needs to ascend a little to ensure that the mechanical locks of the racks at two sides are fully opened no matter the mother platform or the secondary lifting, and then descending operation is carried out.
In the descending process of the lifting machine, the inclination angle sensors (31, 31 a) are utilized to automatically eliminate the accumulated leveling error of the hydraulic system, when the second table top (P2) is higher than the first table top (P1), the PC board can give an instruction to the leveling electromagnetic valve according to the data comparison of the two inclination angle sensors (31, 31 a), the leveling electromagnetic valve (6 a) is opened, and the auxiliary oil cylinder (13) of the mother table is leveled by draining oil.
The oil cylinder structure is not only suitable for a scissor type lifter, but also comprises a column type lifter.
The operation of the present invention will be described with reference to the accompanying drawings.
The operation process of the corner disc is described as follows:
a) Before the vehicle is started to a lifting machine, pin shafts of two fixed pin assemblies (24-14) are inserted into small holes of a turntable (24-5) through the fixed holes of a base (24-3) to fix the turntable (24-5), front wheels of the vehicle are started to a corner plate (24), the vehicle is lifted by a secondary lifting structure (23) before the vehicle is subjected to four-wheel positioning, the front wheels of the vehicle are lifted to leave the corner plate (24), the pin shafts of the fixed pin assemblies (24-14) are pulled out of the turntable (24-5) and the fixed holes of the base (24-3), at the moment, the turntable (24-5) is in a floating state, when the secondary lifting structure (23) descends, the wheels are contacted with the turntable (24-5) of the corner plate (24) again, and the turntable (24-5) can rotate and laterally move under the action of factors such as the camber angle of the wheels of the vehicle and the king pin inner inclination angle.
b) The turntable (24-5) slides and rotates on the bead disk (24-4);
c) The floating sleeve (24-1) is connected with the turntable (24-5) through a countersunk head screw (24-6) and slides or rotates along with the turntable (24-5), and the sliding and rotating range is limited by a middle groove of the base (24-3);
the function of the baffle (24-2) is to prevent the floating sleeve (24-1) from falling out of the base (24-3) Kong Danqi.
The secondary lifting structure (23) falls on the lifting table top (22), the lifting table top (22) of the lifting machine also falls to the lowest point, the vehicle is started to the lifting table top (22) of the lifting machine, after the main table is lifted to a required height, the secondary lifting structure (23) sub-table main cylinder (16) is started to push the support arm assembly (23-28) in the sub-table, the table plate assembly (23-29) is lifted to the height capable of pulling out the pulling assembly (23-3), the pulling assembly (23-3) is pulled out to the position capable of being at the top of the automobile, the lifting operation is continued to the maximum height, then the locking operation is carried out, at the moment, the thin cylinder (23-30) is in an exhaust state, and the transverse shaft on which the locking plate (23-27) slides leftwards is abutted to the locking teeth on the locking block at the right end of the locking bottom plate (23-22); when the lift is lowered, the lift is delayed to lift, the thin air cylinder (23-30) is connected with high-pressure air to jack the locking plate (23-27) to be in an unlocking state, then the piston rod of the main oil cylinder (16) of the sub-platform starts to be lowered, the locking plate (23-27) slides leftwards beyond the locking block at the right end of the locking bottom plate (23-22), the sliding block (23-25) on the support arm assembly (23-28) in the sub-platform slides leftwards on the main platform surface, and the platform plate assembly (23-29) falls down to be flat on the lifting platform surface (22).
The sideslip and sand frame structure (25) is that before the vehicle runs on the lifting machine, two fixing pin assemblies (25-6) are inserted into holes on the corners of the sideslip base plate assemblies (25-1) to fix, so that the sideslip plate (25-5) is in a locking state in the running process of the vehicle; when four-wheel positioning is performed, the lifting machine lifts the vehicle, and then two fixing pin assemblies (25-6) are pulled out from holes in corners of the side sliding bottom plate assemblies (25-1); when the vehicle falls down onto the side slide plate (25-5) again, the side slide plate (25-5) slides or swings in two directions by the two sliding structures under the action of factors such as the camber angle of the vehicle wheel and the caster angle of the kingpin.
The side sliding bottom plate assembly (25-1) cuts two rectangular holes in the middle of the bottom plate (25-1-1), and then a square frame (25-1-2) with a shoulder is welded on the rectangular holes, so that the structure is favorable for fully utilizing the thickness space size and enabling the side sliding to be thinner; the side sliding block (25-11) with the shoulder is arranged in the limited space and transversely slides in the square frame (25-1-2) with the shoulder, and a rectangular chute with the shoulder is designed below the side sliding block (25-11) so that the side sliding pin shaft (25-10) with the shoulder can longitudinally slide.
The side slip sand rack (25-2) provides support for the side slip plate (25-5) as it slides and rolls between the side slip sand rack (25-2) and the side slip floor assembly (25-1). When the vehicle is lifted and has no load, the side sliding plate (25-5) can be reset by the tension of the tension spring (25-2-3).
When the lifting machine ascends, the rack and rack assembly (26-8) ascends and contracts along with the lifting machine in the lock tooth box assembly (26-1), and the upper tooth inclined surface of the rack and rack assembly (26-8) pushes the lower inclined surface of the lock tongue (26-17) of the lock tooth (26-2) to overcome the pulling force of the tension spring (26-16) to unlock.
When the lifter descends, the cylinder (26-5) is opened by pushing the locking teeth (26-2) upwards against the pulling force of the tension spring (26-16) after high-pressure gas is introduced. Meanwhile, the two proximity switches (26-14) respectively detect the lock tooth limiting plates (26-12) to determine whether the lock bolts (26-17) of the lock teeth (26-2) are jacked up or not, and transmit signals to the PC board chip, if any 1 lock tooth (26-2) lock bolts (26-17) are not lifted up, the lifting machine is not lowered, and the vehicle is prevented from being overturned.
When the lifter is locked and operated, the air cylinder (26-5) is vented to the atmosphere for pressure relief, the rack and rack assembly (26-8) descends and retracts along with the lifter in the lock tooth box assembly (26-1) in the descending process of the lifter, the lock tooth (26-2) downwards clamps the lock tongue (26-17) on the tooth of the rack and rack assembly (26-8) under the action of a spring force, and the lifter stops descending the lock tooth.
By adjusting the distance between the front end surface of the proximity switch (26-14) and the locking tooth limiting plate (26-12), the lock tongue (26-17) of the locking tooth (26-) 2 is ensured to enter the tooth position of the rack-and-rack assembly (26-8), and the proximity switch (26-14) senses the proximity signal of the locking tooth limiting plate (26-12). This signal is transmitted to the control system.
Only when the lock bolts (26-17) of the lock teeth (26-2) in the two sets of lock tooth structures (26) of the lifter enter the tooth positions of the rack and rack assembly (26-8), the two proximity switches (26-14) sense the proximity signals of the lock tooth limiting plates (26-12), the lifter can perform the lock tooth action, otherwise, the lifter can only have the lifting action under the control of the control system without descending the lock teeth, and the danger of vehicle rollover caused by single-side lock teeth is prevented.
When the bottom of the lifting machine is lifted, the first power assisting claw (28) is pushed by the piston rod of the master platform oil cylinder, the lower power assisting roller (28-4) is firstly contacted with the base plate (33) on the lifting machine base (20), the lifting machine is lifted in a power assisting state, when the lifting machine is lifted to a certain height, the vertical plates at two sides of the power assisting assembly (28-1) of the first power assisting claw (28) and the second power assisting claw (28 a) are contacted with the transverse plate (35) welded at the middle part of the inner support arm (34), and the power assisting lifting process is ended to continue lifting.
When any one of the two table tops (P1) and (P2) of the lifting machine is provided with an obstacle, the two side vertical plates of the table frame power assisting assembly (28-1) without the obstacle still contact with the transverse plate (35) welded at the middle part of the inner support arm (34), the table top is independently lowered, the first power assisting claw (28) or the second power assisting claw (28 a) of the table frame without the obstacle can be turned over under the drive of the piston rod of the master table cylinder, and when the first power assisting claw (28) is turned over to a certain angle, the cam surface of the positioning plate (29) of the first power assisting claw (28) touches the roller of the travel switch (30) to send a signal, the signal can be transmitted to the control system of the lifting machine, the lifting machine is stopped from continuously lowering, and the danger of vehicle rollover caused by the lowering of the lifting machine at one side is prevented.
The high-pressure oil from the power unit enters a rodless cavity of a master cylinder (12) from a second joint (12-5), the piston (12-3) moves to the inner end surface of the guide sleeve (12-4) under the action of the high-pressure oil, the lifting machine rises to the highest point, the high-pressure oil enters an oil duct (12-9) between the outer circle of the cylinder (12-1) and the inner circle of the guide sleeve (12-4) through a first oil hole (12-6) and an outer circular oil guide groove (12-7) on the piston (12-3), 6 oil drain holes (12-8) designed on the circumference of the cylinder (12-1), and flows back to the power unit (P) through a groove (12-10) on the guide sleeve (12-4) and a second oil hole (12-11) on the guide sleeve (12-4), the second joint (12-5) is connected to the rodless cavity of a master auxiliary cylinder (13), and the flow-through process in the master cylinder (13) is the same as that of the master cylinder (12), and the high-pressure oil flows back to the power unit (P) through the pistons (12-3), the guide sleeve (12-1) and the oil duct (12-4), and the power unit is discharged simultaneously.
The piston (12-3) is during extension. And the automatic oil supplementing and exhausting (primary installation) and leveling actions are started within 13mm from the inner end surface of the guide sleeve (12-4). The Griley ring (12-14) passes through six oil drainage small holes (12-8) on the cylinder barrel (12-1), edges and corners of the small holes are treated smoothly, the sealing ring cannot be scratched, at the moment, oil pressure cannot generate high pressure (pressure peak value) on the Griley ring (12-14) due to the fact that the piston (12-3) reaches the stroke end point, meanwhile, oil flow bypasses the Griley ring (12-14) through a bypass, liquid flow cannot flow through a sealing device of the piston (12-3) at high pressure and speed, adverse effects are generated on the Griley ring (12-14), and a protection effect is achieved on sealing.
The smaller the diameter of the 6 oil drain holes (12-8) is designed on the circumference of the cylinder barrel (12-1), the more stable the floating state is when the piston (12-3) moves to be within 13mm from the inner end surface of the guide sleeve (12-4).
The design structure of the oil drain channel can be also used at the other end (cylinder end) of the oil cylinder, the cylinder end can be designed into a threaded connection mode (instead of a welding mode), the oil drain channels of the two oil cylinders are communicated when the lifting machine is lowered to a low point, and the lifting machine is subjected to oil supplementing, draining and leveling; the mode is particularly suitable for being used on a gantry type lifter with an inverted oil cylinder.
The oil drain channel structure is designed at the other end (cylinder head end) of the oil cylinder, when the oil drain channel structure is applied to a scissor type lifter, the speed can be slow when the oil drain channel structure starts to rise, the oil drain small hole (12-8) on the cylinder barrel (12-1) is designed to be smaller, the oil drain quantity is controlled to ensure that the oil quantity initially rising of the oil cylinder is enough to build up rising pressure, and the oil drain channel structure can normally rise to operate when the sealing ring on the piston passes through the small hole on the cylinder barrel.
When the lifter falls at the lowest point, the control system defaults to 0 for the data difference value of the inclination angle sensors (31, 31 a), namely, the two table tops are parallel, the numerical values of the inclination angle sensors (31) and the numerical values of the inclination angle sensors (31 a) are compared in real time in the lifting process of the lifter, and when the difference value is replaced by the height difference exceeding 5mm, leveling control is started.
In the lifting process of the lifting machine, when the second table top (P2) is lower than the first table top (P1), the leveling electromagnetic valve (6 a) is opened, and oil supplementing and leveling are carried out on the auxiliary oil cylinder (13) of the mother table.
In the descending process of the lifter, when the second table top (P2) is higher than the first table top (P1), the leveling electromagnetic valve (6 a) is opened to level the oil drainage of the auxiliary oil cylinder (13) of the master table.
It should be understood that the foregoing detailed description of the present invention is provided for illustration only and is not limited to the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention may be modified or substituted for the same technical effects; as long as the use requirement is met, the invention is within the protection scope of the invention.

Claims (6)

1. The oil cylinder structure comprises a master main oil cylinder (12) and a master auxiliary oil cylinder (13) and is characterized in that the master main oil cylinder (12) is connected with the master auxiliary oil cylinder (13) in series, and the annular area of a rod cavity of the master main oil cylinder (12) is equal to the area of a rodless cavity of the master auxiliary oil cylinder (13);
the oil cylinder comprises a piston (12-3), the piston (12-3) is connected with a piston rod (12-2), and the piston rod (12-2) is connected with a first power-assisted claw (28) and a second power-assisted claw (28 a); the end face of the piston (12-3) is provided with a first oil hole (12-6), the first oil hole (12-6) bypasses a supporting ring (12-12) on the outer wall of the piston (12-3) and is communicated with an annular oil guide groove (12-7) on the outer circle of the piston (12-3), an oil drainage small hole (12-8) is formed in the circumference of the cylinder barrel (12-1), the oil drainage small hole (12-8) is communicated with the oil guide groove (12-7), the end part of the cylinder barrel (12-1) is arranged in a guide sleeve (12-4), a sealing ring (12-13) is arranged between the inner wall of the guide sleeve (12-4) and the outer wall of the cylinder barrel (12-1), and the sealing ring is arranged in a groove on the inner wall of the guide sleeve (12-4); the tail end of the cylinder barrel (12-1) is provided with a through hole, and a first joint (12-15) is arranged at the through hole; the number of the oil drainage holes (12-8) is six, and the oil drainage holes are uniformly distributed along the circumferential direction; the oil drain holes (12-8) are arranged on the outer side of the sealing ring (12-13), an oil passage (12-9) is arranged between the outer circle of the cylinder barrel (12-1) and the inner circle of the guide sleeve (12-4) at the positions of the six oil drain holes (12-8) on the cylinder barrel (12-1), a groove (12-10) is processed on the end face of the inner hole of the guide sleeve (12-4), the groove (12-10) is communicated with the oil passage (12-9), and the groove (12-10) is communicated with a second oil hole (12-11) on the guide sleeve (12-4) and an oil passage of the second joint (12-5).
2. The oil cylinder structure according to claim 1, characterized in that the outer wall of the piston (12-3) is provided with an annular groove, a gray ring (12-14) is arranged in the annular groove, and the outer end of the gray ring (12-14) is contacted with the inner wall of the cylinder barrel (12-1).
3. The cylinder structure according to claim 1, further comprising a power-assisted anti-overturning component, wherein the power-assisted anti-overturning component comprises a first power-assisted claw (28) and a second power-assisted claw (28 a), the piston rod end of the master cylinder (12) is provided with the first power-assisted claw (28), the piston rod end of the master cylinder (13) is provided with the second power-assisted claw (28 a), and the power-assisted claw is connected with the inner support arm (34) of the lifting machine through a shaft.
4. A cylinder structure according to claim 3, characterized in that a first booster cylinder (14) and a second booster cylinder (15) are further provided, the lower end of the booster cylinder is connected with the lower end of an inner support arm (34) of the lifting machine in a shaft way, and the upper end of a piston rod of the booster cylinder is connected with the upper part of an outer support arm (21) of the lifting machine in a shaft way.
5. The cylinder structure according to claim 1, characterized in that the first power assisting claw (28) and the second power assisting claw (28 a) comprise a power assisting assembly (28-1), a middle shaft hole (28-9) of the power assisting assembly (28-1) is connected with an inner support arm (34) of the lifting machine through a shaft, an upper shaft hole (28-8) of the power assisting assembly (28-1) is connected with a piston rod earring of a master cylinder (12) of the master platform, and a lower shaft hole (28-10) of the power assisting assembly (28-1) is connected with a power assisting roller (32) through a power assisting roller shaft (28-2), a power assisting spacer (28-3), a shaft sleeve (28-5) and a retainer ring (28-6).
6. A cylinder structure according to claim 3, further comprising a travel switch (30), wherein the travel switch (30) is mounted inside the inner arm (34), the mounting plate has a long hole with adjustable distance, and the roller of the travel switch (30) is engaged with the cam surface of the positioning plate (29) on the power assisting component (28-1).
CN202111036038.0A 2021-09-06 2021-09-06 Oil cylinder structure Active CN113636495B (en)

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CN117553048A (en) * 2023-11-16 2024-02-13 苏州艾沃意特汽车设备有限公司 Hydraulic cylinder for lifting machine and scissor type lifting machine

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CN106957027A (en) * 2017-04-26 2017-07-18 中意泰达(营口)汽车保修设备有限公司 The full-automatic leveling system of lifting machine
JP2019171398A (en) * 2018-03-27 2019-10-10 住友重機械工業株式会社 Hydraulic press
CN112483507A (en) * 2020-12-09 2021-03-12 南京理工大学 Leveling hydraulic cylinder
CN113003471A (en) * 2021-03-01 2021-06-22 营口市立德电子科技有限公司 Lifting machine
CN215711447U (en) * 2021-09-06 2022-02-01 中意泰达(营口)汽车保修设备有限公司 Oil cylinder structure

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Publication number Priority date Publication date Assignee Title
EP0017684A1 (en) * 1979-04-23 1980-10-29 Showa Manufacturing Co., Ltd. Hydraulic cylinder for a propulsion unit of an inboard or outboard motor
CN203463409U (en) * 2013-09-29 2014-03-05 合肥长源液压股份有限公司 Oil cylinder with piston provided with small radial hole
CN103867525A (en) * 2014-04-08 2014-06-18 武汉科技大学 Variable speed double-piston series-connection hydraulic cylinder
CN104314918A (en) * 2014-06-18 2015-01-28 国家电网公司 Hydraulic operating mechanism for high pressure switch and hydraulic working cylinder thereof
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CN215711447U (en) * 2021-09-06 2022-02-01 中意泰达(营口)汽车保修设备有限公司 Oil cylinder structure

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