CN213163998U

CN213163998U - Double-oil-cylinder hydraulic assembling device

Info

Publication number: CN213163998U
Application number: CN202021868169.6U
Authority: CN
Inventors: 张旭强; 华祖民
Original assignee: Suzhou Xinyuji Precision Machinery Co ltd
Current assignee: Suzhou Xinyuji Precision Machinery Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-05-11
Anticipated expiration: 2030-09-01

Abstract

A double-oil-cylinder hydraulic assembly device comprises oil cylinder assemblies, a hydraulic pump station, an upper frame and a lower frame, wherein the number of the oil cylinder assemblies is 2; the upper frame comprises a mounting plate, a bottom plate and pillars, the lower frame comprises a workbench, frame legs and a storage plate, the mounting plate and the bottom plate are horizontally arranged from top to bottom, four corners of the lower surface of the mounting plate are vertically and fixedly connected with four corners of the upper surface of the bottom plate through 4 upper pillars, 2 oil cylinder assemblies are mounted on the mounting plate, a cylinder body of each oil cylinder assembly is fixedly mounted on the upper surface of the mounting plate, and a piston rod penetrates through the mounting plate; the workstation setting is in bottom plate below and workstation lower surface four corners department vertical fixedly connected with frame leg respectively, 4 the level is provided with puts the thing board in the frame leg lower part. Double cylinder hydraulic pressure assembly quality, structural design is reasonable, can realize duplex position simultaneous operation, improved work efficiency, the flexibility is high, application prospect is extensive.

Description

Double-oil-cylinder hydraulic assembling device

Technical Field

The utility model relates to a hydraulic pressure technical field, concretely relates to double-cylinder hydraulic assembly device.

Background

Hydraulic pressure is a term in the mechanical industry and the electromechanical industry, and can be used in a power transmission mode to form hydraulic transmission, and hydraulic pressure can also be used as a control mode to be called hydraulic control. A complete hydraulic system consists of five parts, namely a power source device, an execution device, a control and regulation device, an auxiliary device and a liquid medium. The hydraulic pressure has the characteristics of large transmission power, easy transmission and configuration and the like, and is widely applied in industrial and civil industries. The hydraulic system has the function of converting the pressure energy of the liquid into mechanical energy so as to obtain the required linear reciprocating motion or rotary motion. The energy source device (hydraulic pump) of the hydraulic system functions to convert the mechanical energy of the prime mover into pressure energy of the fluid.

As an actuator of the hydraulic system, a hydraulic ram can convert hydraulic energy into mechanical energy. According to different structural forms, the hydraulic oil cylinder is divided into a piston cylinder, a plunger cylinder and a swing cylinder. For the piston cylinder and the plunger cylinder, the motion form is reciprocating linear motion, so that the output of speed and thrust can be realized; for the oscillating cylinder, the motion form is curvilinear reciprocating oscillation, and angular velocity and torque can be output. The hydraulic oil cylinder has a simple structure and high reliability, and can be combined with a plurality of hydraulic oil cylinders or other mechanisms, so that the hydraulic oil cylinder is widely applied to the field of engineering machinery, such as clamps. The existing oil cylinder hydraulic assembly device for clamping in the market is mostly single oil cylinder output, and after being matched with a corresponding clamp, the device can only perform single-station operation, so that the working efficiency is low. Therefore, in order to solve the above problems, it is necessary to develop a dual cylinder hydraulic assembling apparatus.

Chinese patent application No. CN201821247714.2 discloses a novel spring hydraulic assembly device, which comprises a positioning and fixing mechanism and a hydraulic driving mechanism; the positioning and fixing mechanism comprises a base, a spring lower auxiliary support, a rear positioning base body, a lower positioning block, a first lower auxiliary support and a second lower auxiliary support; the hydraulic driving mechanism comprises a driving oil cylinder, a hinging block and a movable positioning seat, and the problems that the single-station operation can be only carried out by single-oil-cylinder output and the working efficiency is low are not solved.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: in order to overcome not enough above, the utility model aims at providing a double-cylinder hydraulic assembly device, structural design is reasonable, can realize the duplex position simultaneous operation, has improved work efficiency, and the flexibility is high, and application prospect is extensive.

The technical scheme is as follows: a double-oil-cylinder hydraulic assembly device comprises oil cylinder assemblies, a hydraulic pump station, an upper frame and a lower frame, wherein the number of the oil cylinder assemblies is 2; the upper frame comprises a mounting plate, a bottom plate and pillars, the lower frame comprises a workbench, frame legs and a storage plate, the mounting plate and the bottom plate are horizontally arranged from top to bottom, four corners of the lower surface of the mounting plate and four corners of the upper surface of the bottom plate are vertically and fixedly connected through 4 pillars, 2 oil cylinder assemblies are mounted on the mounting plate, a cylinder body of each oil cylinder assembly is fixedly mounted on the upper surface of the mounting plate, and a piston rod penetrates through the mounting plate; the workstation setting is in the bottom plate below and workstation lower surface four corners department vertical fixedly connected with frame leg respectively, 4 the level is provided with in the frame leg lower part puts the thing board, hydraulic power unit arranges in and puts on the thing board, hydraulic power unit respectively with 2 the oil cylinder subassembly passes through hydraulic pressure union coupling.

The double-oil-cylinder hydraulic assembling device has reasonable structural design and good overall device stability, and compared with the single-oil-cylinder output in the prior art, the double-oil-cylinder hydraulic assembling device adopts double-oil-cylinder assembly output, can realize double-station simultaneous operation after being configured with corresponding clamps, and improves the working efficiency; 2 one of them can be closed to the oil cylinder subassembly, and another oil cylinder subassembly realizes the function of single hydro-cylinder, and the flexibility is high, and it is more convenient to operate.

Furthermore, foretell double cylinder hydraulic pressure assembly quality, hydraulic power unit includes motor, hydraulic pump, oil tank, switching-over valve, oil tank, hydraulic pump, switching-over valve, hydro-cylinder subassembly connect gradually, the motor is connected with the hydraulic pump and drives the hydraulic pump.

Furthermore, in the double-oil-cylinder hydraulic assembling device, the reversing valve is also provided with a branch connected with the oil tank.

Furthermore, in the double-oil-cylinder hydraulic assembling device, an overflow valve is arranged between the hydraulic pump and the reversing valve.

The overflow valve is arranged between the hydraulic pump and the reversing valve, so that the functions of constant pressure overflow, pressure stabilization, system unloading and safety protection can be achieved.

Furthermore, in the above double-cylinder hydraulic assembly device, a manual valve and a speed regulating valve are further arranged between the reversing valve and the cylinder assembly, the number of connecting pipelines between the reversing valve and the cylinder assembly is 2, and the connecting pipelines include a first pipeline and a second pipeline; the manual valve comprises a manual valve I, a manual valve II, a manual valve III and a manual valve IV, and the speed regulating valve comprises a speed regulating valve I, a speed regulating valve II, a speed regulating valve III and a speed regulating valve IV; the reversing valve, the pipeline I, the manual valve I, the speed regulating valve I and the oil cylinder assembly are sequentially connected, and the reversing valve, the pipeline II, the manual valve II, the speed regulating valve II and the oil cylinder assembly are sequentially connected; the reversing valve, the pipeline I, the manual valve III, the speed regulating valve III and the other oil cylinder assembly are sequentially connected, and the reversing valve, the pipeline II, the manual valve IV, the speed regulating valve IV and the other oil cylinder assembly are sequentially connected.

Due to the design, the use flexibility is improved, and the working modes of 2 oil cylinder assemblies can be freely adjusted. When the descending speed regulating valve button of the speed regulating valve is pressed down, the piston rod of the oil cylinder component descends to a pressing contact surface, the ascending speed regulating valve button is pressed down, and the piston rod of the oil cylinder component ascends to an upper limit position; the piston rod of the oil cylinder component can be inching-moved to descend by pressing the button of the up-down inching speed regulating valve, continuously descend for a long time, and the loosening is stopped; when the button of the lifting inching speed regulating valve is pressed down, the piston rod of the oil cylinder assembly can be inching lifted, continuously lifted for a long time, and the loosening is stopped.

Further, in the double-cylinder hydraulic assembling device, the lower end of the piston rod of the cylinder assembly is provided with the connecting plate.

The lower end of the piston rod is provided with a connecting plate, and the output pressure can be improved by arranging the connecting plate.

Furthermore, in the double-oil-cylinder hydraulic assembling device, the bottom parts of the 4 machine frame legs are provided with the shock absorbers.

In order to further strengthen the stability of the double-oil-cylinder hydraulic assembling device and improve the bearing strength, the bottom of the rack leg is provided with a shock absorber, so that the shock is effectively reduced, and the service life of the device is prolonged.

Furthermore, in the double-cylinder hydraulic assembling device, the 4 shock absorbers comprise a bracket, a mass block, a first metal mesh rubber, a second metal mesh rubber, a screw and a nut; the support, the first wire mesh rubber, the mass block and the second wire mesh rubber are sequentially arranged from bottom to top; the screw penetrates through the support, the first metal mesh rubber, the mass block and the second metal mesh rubber, and a nut is arranged above the screw.

Further, a handle is arranged on the left side of the housing II, and a first protective shell is arranged at the upper end and the lower end of the first wire mesh rubber; the upper end and the lower end of the second metal wire mesh rubber are provided with a second protective shell; and a gasket is arranged at the joint of the screw and the bracket.

The shock absorber is composed of a support, a mass block, a protective shell, a bolt, a nut, a pair of wire mesh rubbers and the like. The support is used for connecting and fixing other components of the shock absorber, the protective shell can provide supporting and protecting effects for the first metal mesh rubber and the second metal mesh rubber, the first metal mesh rubber and the second metal mesh rubber are organically combined into a whole, the bolt penetrates through the shock absorption mechanism, and the relative pre-tightening amount of the first metal mesh rubber and the second metal mesh rubber can be controlled by adjusting the bolt and the nut. The shock absorber is of a symmetrical structure, bidirectional shock absorption in the axial direction of the shock absorber can be achieved, when the first metal wire mesh rubber and the second metal wire mesh rubber are excited by external vibration during working and the shock absorption mechanism has a certain pre-tightening amount, the first metal wire mesh rubber and the second metal wire mesh rubber on the upper layer and the lower layer bear pressure, so that the shock absorber can bear periodic tension and compression loads, and the stability and the service life of the double-oil-cylinder hydraulic assembly device are improved.

The utility model has the advantages that:

(1) the double-oil-cylinder hydraulic assembling device has reasonable structural design, and compared with the single-oil-cylinder output in the prior art, the double-oil-cylinder hydraulic assembling device adopts double-oil-cylinder assembly output, can realize double-station simultaneous operation after being configured with corresponding clamps, and improves the working efficiency; the working modes of the 2 oil cylinder assemblies can be freely adjusted, so that the flexibility is high, the operation is more convenient, and the application prospect is wide;

(2) double cylinder hydraulic pressure assembly quality, overall installation stability is good, effectively reduces the vibrations that the use produced, improves the life of device.

Drawings

Fig. 1 is a schematic view of the overall structure of the double-cylinder hydraulic assembling device of the present invention;

fig. 2 is a front view of the double-cylinder hydraulic assembling device of the present invention;

fig. 3 is a left side view of the double-cylinder hydraulic assembling device of the present invention;

fig. 4 is an electrical diagram of the oil cylinder group and the hydraulic pump station of the double-oil cylinder hydraulic assembling device of the present invention;

fig. 5 is a schematic structural view of a shock absorber of the double-cylinder hydraulic assembling device of the present invention;

in the figure: the hydraulic control system comprises an oil cylinder assembly 1, a cylinder body 11, a piston rod 12, a hydraulic pump station 2, a motor 21, a hydraulic pump 22, an oil tank 23, a reversing valve 24, a branch 241, an overflow valve 25, a manual valve 26, a manual valve first 261, a manual valve second 262, a manual valve third 263, a manual valve fourth 264, a speed regulating valve 27, a speed regulating valve first 271, a speed regulating valve second 272, a speed regulating valve third 273, a speed regulating valve fourth 274, a pipeline first 28, a pipeline second 29, an upper frame 3, a mounting plate 31, a bottom plate 32, a support column 33, a lower frame 4, a workbench 41, a frame leg 42, a storage plate 43, a shock absorber 44, a support 441, a mass 442, a metal wire mesh rubber first 443, a metal wire mesh rubber second 444, a screw 445, a nut 446, a first protective shell 447, a.

Detailed Description

The invention will be further elucidated with reference to the accompanying figures 1-5 and the specific embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The double-cylinder hydraulic assembly device with the structure shown in fig. 1, 2 and 3 comprises 2 cylinder assemblies 1, hydraulic pump stations 2, an upper frame 3 and a lower frame 4, wherein the number of the cylinder assemblies 1 is 2; the upper frame 3 comprises a mounting plate 31, a bottom plate 32 and a strut 33, the lower frame 4 comprises a workbench 41, frame legs 42 and a storage plate 43, the mounting plate 31 and the bottom plate 32 are horizontally arranged from top to bottom, four corners of the lower surface of the mounting plate 31 are vertically and fixedly connected with four corners of the upper surface of the bottom plate 32 through 4

struts

33, 2 oil cylinder assemblies 1 are mounted on the mounting plate 31, and a cylinder body 11 of each oil cylinder assembly 1 is fixedly mounted on the upper surface of the mounting plate 31 and a piston rod 12 penetrates through the mounting plate 31; the working table 41 is arranged below the bottom plate 32, four corners of the lower surface of the working table 41 are respectively and fixedly connected with

frame legs

42 and 4, an object placing plate 43 is horizontally arranged in the lower portion of each frame leg 42, the hydraulic pump stations 2 are arranged on the object placing plates 43, and the hydraulic pump stations 2 are respectively connected with the oil cylinder assemblies 1 through hydraulic pipes.

In addition, as shown in fig. 4, the hydraulic pump station 2 includes a motor 21, a hydraulic pump 22, an oil tank 23, and a reversing valve 24, the oil tank 23, the hydraulic pump 22, the reversing valve 24, and the cylinder assembly 1 are connected in sequence, and the motor 21 is connected to the hydraulic pump 22 and drives the hydraulic pump 22.

Furthermore, a branch 241 connected with the oil tank 23 is further provided on the direction valve 24. An overflow valve 25 is provided between the hydraulic pump 22 and the selector valve 24.

In addition, a manual valve 26 and a speed regulating valve 27 are further arranged between the reversing valve 24 and the oil cylinder assembly 1, the number of connecting pipelines of the reversing valve 24 and the oil cylinder assembly 1 is 2, and the connecting pipelines comprise a first pipeline 28 and a second pipeline 29; the manual valve 26 comprises a manual valve I261, a manual valve II 262, a manual valve III 263 and a manual valve IV 264, and the speed regulating valve 27 comprises a speed regulating valve I271, a speed regulating valve II 272, a speed regulating valve III 273 and a speed regulating valve IV 274; the reversing valve 24, the pipeline I28, the manual valve I261, the speed regulating valve I271 and the oil cylinder assembly 1 are sequentially connected, and the reversing valve 24, the pipeline II 29, the manual valve II 262, the speed regulating valve II 272 and the oil cylinder assembly 1 are sequentially connected; the reversing valve 24, the pipeline I28, the manual valve III 263, the speed regulating valve III 273 and the other oil cylinder assembly 1 are sequentially connected, and the reversing valve 24, the pipeline II 29, the manual valve IV 264, the speed regulating valve IV 274 and the other oil cylinder assembly 1 are sequentially connected.

Further, a connecting plate is arranged at the lower end of the piston rod 12 of the oil cylinder assembly 1.

Further, a shock absorber 44 is mounted at the bottom of each of the 4 frame legs 42.

Further, as shown in fig. 5, 4 of the shock absorbers 44 include a bracket 441, a mass 442, a first wire mesh rubber 443, a second wire mesh rubber 444, a screw 445, a nut 446; the support 441, the first wire mesh rubber 443, the mass block 442 and the second wire mesh rubber 444 are sequentially arranged from bottom to top; the screw 445 penetrates through the bracket 441, the first wire mesh rubber 443, the mass 442 and the second wire mesh rubber 444, and a nut 446 is arranged above the screw 445.

Further, the upper end and the lower end of the first wire mesh rubber 443 are provided with a first protective shell 447; a second protective shell 448 is arranged at the upper end and the lower end of the second wire mesh rubber 444; a gasket 449 is arranged at the joint of the screw 445 and the bracket 441.

Examples

Based on the above structure, as shown in FIGS. 1 to 5.

Double cylinder hydraulic pressure assembly quality, structural design is reasonable, overall installation stability is good, compares the single cylinder output among the prior art, the utility model discloses an adopt double cylinder subassembly 1 output, after the corresponding anchor clamps of configuration duplex position, can realize the simultaneous operation in duplex position, improved work efficiency.

Furthermore, an overflow valve 25 is arranged between the hydraulic pump 22 and the reversing valve 24, so that the functions of constant pressure overflow, pressure stabilization, system unloading and safety protection can be achieved.

A manual valve 26 and a speed regulating valve 27 are further arranged between the reversing valve 24 and the oil cylinder assembly 1, the number of connecting pipelines of the reversing valve 24 and the oil cylinder assembly 1 is 2, and the connecting pipelines comprise a first pipeline 28 and a second pipeline 29; the manual valve 26 comprises a manual valve I261, a manual valve II 262, a manual valve III 263 and a manual valve IV 264, and the speed regulating valve 27 comprises a speed regulating valve I271, a speed regulating valve II 272, a speed regulating valve III 273 and a speed regulating valve IV 274; the reversing valve 24, the pipeline I28, the manual valve I261, the speed regulating valve I271 and the oil cylinder assembly 1 are sequentially connected, and the reversing valve 24, the pipeline II 29, the manual valve II 262, the speed regulating valve II 272 and the oil cylinder assembly 1 are sequentially connected; the reversing valve 24, the pipeline I28, the manual valve III 263, the speed regulating valve III 273 and the other oil cylinder assembly 1 are sequentially connected, and the reversing valve 24, the pipeline II 29, the manual valve IV 264, the speed regulating valve IV 274 and the other oil cylinder assembly 1 are sequentially connected.

Due to the design, the use flexibility is improved, and the working modes of the 2 oil cylinder assemblies 1 can be freely adjusted. When the speed regulating valve button of the speed regulating valve 27 is pressed down, the piston rod 12 of the oil cylinder assembly 1 descends to a pressing contact surface, the ascending speed regulating valve button is pressed down, and the piston rod 12 of the oil cylinder assembly 1 ascends to an upper limit position; the piston rod 12 of the oil cylinder component 1 can be inching-moved to descend by pressing the button of the up-down inching speed regulating valve, continuously descend for a long time, and stop loosening; when the button of the lifting inching speed regulating valve is pressed down, the piston rod 12 of the oil cylinder component 1 can be inching lifted, continuously lifted for a long time, and the loosening is stopped.

Further, a connecting plate is arranged at the lower end of the piston rod 12, and output pressure can be improved through the connecting plate.

In order to further enhance the stability of the double-cylinder hydraulic assembling device and improve the bearing strength, the bottom of the frame leg 42 is provided with a shock absorber 44, so that the shock is effectively reduced, and the service life of the device is prolonged.

Further, the damper 44 is composed of a support 441, a mass 442, a first protective shell 447, a second protective shell 448, a screw 445, a nut 446, a pair of wire-mesh rubbers one 443, a wire-mesh rubbers two 444, and the like. The support 441 is used for connecting and fixing other components of the shock absorber 44, the first protective shell 447 and the second protective shell 448 can provide supporting and protecting effects for the first wire mesh rubber 443 and the second wire mesh rubber 444, the pair of the first wire mesh rubber 443 and the second wire mesh rubber 444 are organically combined into a whole, the screw 445 penetrates through the shock absorber 44, and the relative pre-tightening amount of the first wire mesh rubber 443 and the second wire mesh rubber 444 can be controlled by adjusting the screw 445 and the nut 446.

The shock absorber 44 is of a symmetrical structure, so that the shock absorber 44 can realize bidirectional shock absorption in the axial direction, when the first wire mesh rubber 443 and the second wire mesh rubber 444 are excited by external vibration during working and the shock absorber 44 has a certain pre-tightening amount, the two first wire mesh rubbers 443 and the two second wire mesh rubbers 444 on the upper layer and the lower layer bear pressure, so that the shock absorber 44 can bear periodic tension and compression loads, and the stability and the service life of the double-cylinder hydraulic assembly device are improved.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and in order to avoid unnecessary repetition, the present invention does not need to describe any combination of the features.

In addition, the embodiments of the present invention can be arbitrarily combined with each other, and the same shall be regarded as the disclosure of the present invention as long as the idea of the present invention is not violated.

Claims

1. The double-oil-cylinder hydraulic assembly device is characterized by comprising oil cylinder assemblies (1), hydraulic pump stations (2), an upper frame (3) and a lower frame (4), wherein the number of the oil cylinder assemblies (1) is 2; the upper rack (3) comprises a mounting plate (31), a bottom plate (32) and pillars (33), the lower rack (4) comprises a workbench (41), rack legs (42) and a storage plate (43), the mounting plate (31) and the bottom plate (32) are horizontally arranged from top to bottom, four corners of the lower surface of the mounting plate (31) are vertically and fixedly connected with four corners of the upper surface of the bottom plate (32) through the 4 pillars (33), 2 oil cylinder assemblies (1) are mounted on the mounting plate (31), a cylinder body (11) of each oil cylinder assembly (1) is fixedly mounted on the upper surface of the mounting plate (31), and a piston rod (12) penetrates through the mounting plate (31); workstation (41) set up in bottom plate (32) below and workstation (41) lower surface four corners department vertical fixedly connected with frame leg (42), 4 the level is provided with in frame leg (42) lower part and puts thing board (43), hydraulic power unit (2) are arranged in and are put on thing board (43), hydraulic power unit (2) respectively with 2 oil cylinder subassembly (1) are through hydraulic pressure union coupling.

2. The double-cylinder hydraulic assembling device according to claim 1, wherein the hydraulic pump station (2) comprises a motor (21), a hydraulic pump (22), an oil tank (23) and a reversing valve (24), the oil tank (23), the hydraulic pump (22), the reversing valve (24) and the oil cylinder assembly (1) are sequentially connected, and the motor (21) is connected with the hydraulic pump (22) and drives the hydraulic pump (22).

3. The double-cylinder hydraulic assembling apparatus according to claim 2, wherein the direction valve (24) is further provided with a branch (241) connected to the oil tank (23).

4. The double-cylinder hydraulic assembling device according to claim 2, wherein an overflow valve (25) is arranged between the hydraulic pump (22) and the reversing valve (24).

5. The double-cylinder hydraulic assembling device according to claim 2, characterized in that a manual valve (26) and a speed regulating valve (27) are further arranged between the reversing valve (24) and the cylinder assembly (1), the connecting pipelines of the reversing valve (24) and the cylinder assembly (1) are 2, and the connecting pipelines comprise a first pipeline (28) and a second pipeline (29); the manual valve (26) comprises a manual valve I (261), a manual valve II (262), a manual valve III (263) and a manual valve IV (264), and the speed regulating valve (27) comprises a speed regulating valve I (271), a speed regulating valve II (272), a speed regulating valve III (273) and a speed regulating valve IV (274); the reversing valve (24), the pipeline I (28), the manual valve I (261), the speed regulating valve I (271) and the oil cylinder assembly (1) are sequentially connected, and the reversing valve (24), the pipeline II (29), the manual valve II (262), the speed regulating valve II (272) and the oil cylinder assembly (1) are sequentially connected; the reversing valve (24), the first pipeline (28), the third manual valve (263), the third speed regulating valve (273) and the other oil cylinder assembly (1) are sequentially connected, and the reversing valve (24), the second pipeline (29), the fourth manual valve (264), the fourth speed regulating valve (274) and the other oil cylinder assembly (1) are sequentially connected.

6. The double-cylinder hydraulic assembling device according to claim 1, wherein the lower end of the piston rod (12) of the cylinder assembly (1) is provided with a connecting plate.

7. The dual cylinder hydraulic fitting apparatus of claim 1 wherein shock absorbers (44) are mounted to the bottom of each of 4 of said frame legs (42).

8. The dual cylinder hydraulic fitting apparatus according to claim 7, wherein 4 shock absorbers (44) include a bracket (441), a mass (442), a wire rubber one (443), a wire rubber two (444), a screw (445), a nut (446); the support (441), the first wire mesh rubber (443), the mass block (442) and the second wire mesh rubber (444) are sequentially arranged from bottom to top; the screw (445) penetrates through the support (441), the first wire mesh rubber (443), the mass block (442) and the second wire mesh rubber (444), and a nut (446) is arranged above the screw (445).

9. The dual cylinder hydraulic fitting apparatus as claimed in claim 8, wherein the first wire mesh rubber (443) is provided at upper and lower ends thereof with first guards (447); a second protective shell (448) is arranged at the upper end and the lower end of the second wire mesh rubber (444); and a gasket (449) is arranged at the joint of the screw (445) and the bracket (441).