CN111302234B - Lifting appliance with rotatable two shafts - Google Patents
Lifting appliance with rotatable two shafts Download PDFInfo
- Publication number
- CN111302234B CN111302234B CN201911022170.9A CN201911022170A CN111302234B CN 111302234 B CN111302234 B CN 111302234B CN 201911022170 A CN201911022170 A CN 201911022170A CN 111302234 B CN111302234 B CN 111302234B
- Authority
- CN
- China
- Prior art keywords
- cylinder
- hydraulic cylinder
- hydraulic
- oil
- valve
- 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
Links
- 230000001105 regulatory effect Effects 0.000 claims description 23
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 239000003921 oil Substances 0.000 description 130
- 238000010586 diagram Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/16—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements
- B66C23/163—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs supported by columns, e.g. towers having their lower end mounted for slewing movements where only part of the column rotates, i.e. at least the bottom part is fixed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/06—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes with jibs mounted for jibbing or luffing movements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C23/00—Cranes comprising essentially a beam, boom, or triangular structure acting as a cantilever and mounted for translatory of swinging movements in vertical or horizontal planes or a combination of such movements, e.g. jib-cranes, derricks, tower cranes
- B66C23/62—Constructional features or details
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/26—Operating devices pneumatic or hydraulic
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A lifting appliance with rotatable two shafts comprises a motor, a lifting cantilever device and a braking device, wherein the lifting cantilever device is arranged on the motor and can rotate together with the motor; the cantilever device comprises a first hydraulic cylinder, a support arm and a second hydraulic cylinder obliquely arranged between the first hydraulic cylinder and the support arm, wherein the bottom of a cylinder barrel of the first hydraulic cylinder is vertically and fixedly arranged on an output shaft of the motor, the top end of a piston rod of the first hydraulic cylinder is hinged with one end of the support arm, the other end of the support arm is provided with a lifting hook, the lower surface of the support arm is provided with a sliding chute, the bottom of the cylinder barrel of the second hydraulic cylinder is fixedly arranged at the upper end of the cylinder barrel of the first hydraulic cylinder, the top end of the piston rod of the second hydraulic cylinder is hinged with a moving block, and the other end of the moving block is in sliding connection with the sliding chute; the braking device comprises a braking cylinder which is horizontally arranged, a piston rod of the braking cylinder is opposite to one side of the motor output shaft, the top end of the piston rod of the braking cylinder is connected with a braking plate, an arc-shaped groove is formed in the braking plate, and the diameter of a circle where the arc-shaped groove is located is the same as the diameter of the motor output shaft; the hydraulic system is also included; the lifting height is higher, the rotation braking is more sensitive, and the energy consumption can be saved.
Description
Technical Field
The invention belongs to the technical fields of machining and hydraulic transmission, and particularly relates to a lifting appliance with rotatable two shafts.
Background
The support arm of the small cantilever sling used in the workshop at present can only be kept horizontal, and the lifting angle of the suspension arm can not be adjusted; only one oil cylinder is used as a lifting cylinder, and the lifting height is limited to a certain extent; in addition, for the rotary braking of the lifting cylinder, when emergency braking is met, the existing cantilever lifting tool generally adopts a braking mode to close a hydraulic pump station, or a method for unloading the hydraulic pump station, the emergency braking effect is not very sensitive, the energy loss is serious, and finally, the rapid and slow alternation cannot be realized, so that the energy saving purpose cannot be achieved.
Disclosure of Invention
The invention aims to solve the defects of the small cantilever lifting appliance, and provides a lifting appliance with rotatable two shafts, so that the lifting height is higher, the rotation braking is more sensitive, and the energy consumption can be saved.
The technical scheme of the invention is as follows: a lifting appliance with rotatable two shafts comprises a motor, a lifting cantilever device which is arranged on the motor and can rotate together with the motor, and a braking device for braking the motor;
The cantilever device comprises a first hydraulic cylinder for lifting, a support arm for lifting an article, and a second hydraulic cylinder obliquely arranged between the first hydraulic cylinder and the support arm and used for supporting the support arm to lift, wherein the bottom of a cylinder barrel of the first hydraulic cylinder is vertically and fixedly arranged on an output shaft of a motor, the top end of a piston rod of the first hydraulic cylinder is hinged with one end of the support arm, the other end of the support arm is provided with a lifting hook for hanging the article, the lower surface of the support arm is provided with a sliding chute, the bottom of the cylinder barrel of the second hydraulic cylinder is fixedly arranged at the upper end of the cylinder barrel of the first hydraulic cylinder, the top end of the piston rod of the second hydraulic cylinder is hinged with a moving block, and the other end of the moving block is in sliding connection with the sliding chute;
The braking device comprises a braking cylinder which is horizontally arranged, a piston rod of the braking cylinder is opposite to one side of the motor output shaft, the top end of the piston rod of the braking cylinder is connected with a braking plate for holding the motor output shaft tightly, the braking plate is provided with a circular arc groove, and the diameter of the circle where the circular arc groove is positioned is the same as the diameter of the motor output shaft;
The hydraulic system is used for providing power sources for the motor, the first hydraulic cylinder, the second hydraulic cylinder and the brake cylinder.
The hydraulic cylinder is characterized in that a chassis assembly is arranged outside the cylinder barrel of the hydraulic cylinder, a chassis of the chassis assembly is sleeved on an outer barrel of the cylinder barrel of the hydraulic cylinder, the center of the chassis is aligned with the center of the outer barrel, annular protrusions are arranged on the outer wall of the outer barrel, the chassis and the annular protrusions of the outer barrel are welded and fixed through more than two supporting ribs, more than one annular boss is arranged on the inner wall of the outer barrel, a bearing II matched with the outer wall of the cylinder barrel of the hydraulic cylinder is arranged on each annular boss, the chassis is of an annular structure provided with a plurality of threaded holes, and the chassis is fixed with the ground through bolts arranged in the threaded holes.
The cylinder barrel of the first hydraulic cylinder is of a stepped cylindrical structure, the stepped cylindrical surface comprises a small cylindrical part and a large cylindrical part connected to the upper end of the small cylindrical surface, the diameter of the large cylindrical part is larger than the outer diameter of the outer cylinder, an annular groove is formed in the lower end face of the large cylindrical part, and a first bearing is arranged between the annular groove and the outer wall of the outer cylinder; the piston rod of the first hydraulic cylinder is sequentially provided with an annular stop block, a first piston and a second piston from top to bottom, and the outer wall of the cylinder barrel of the first hydraulic cylinder is provided with two first oil holes.
The upper end face of the large cylindrical part of the hydraulic cylinder I is provided with a fixing rod, the fixing rod is provided with a positioning clamp which is used for supporting a piston rod of the hydraulic cylinder I in a matched manner with the annular stop block, the positioning clamp comprises a right clamp and a left clamp, one end part of the right clamp is an inward-bent arc clamping part, the other end part of the right clamp is provided with a semicircular groove I, the middle part of the right clamp is provided with a fixing rod mounting hole I, and the right clamp is provided with a abdicating groove along the radial direction of the fixing rod mounting hole I; one end part of the left clamp is provided with a semicircular clamping part II which is bent inwards, the other end part of the left clamp is provided with a semicircular groove II which is matched with the semicircular groove I, the semicircular groove I and the semicircular groove II are combined to form a limiting rod mounting hole for mounting a fixing rod, the middle part of the left clamp is provided with a fixing rod mounting hole II, and the length of the fixing rod mounting hole II is matched with that of the abdicating groove; the upper end surface contacts with the bottom surface of the annular stop block when the positioning clamp is closed.
The chassis is welded and fixed with the circular boss of the outer cylinder through four supporting ribs, and two annular bosses are arranged on the inner wall of the outer cylinder.
The cross section of the sliding groove is of a T-shaped structure, a hinge hole is formed in one end of the moving block, a cylindrical table matched with the wide portion of the sliding groove is arranged at the other end of the moving block, and an annular groove matched with the narrow portion of the sliding groove is formed in the cylindrical table.
The lower end of the brake cylinder is provided with a bracket, a spring is arranged in a rodless cavity between a piston of the brake cylinder and the bottom of the cylinder barrel, a rod cavity is arranged between the piston of the brake cylinder and the top end of the cylinder barrel, and an oil hole III is formed in the inner wall of the rod cavity.
The bottom end of the cylinder barrel of the first hydraulic cylinder is connected with an extended shaft, the shaft is connected with an output shaft of the motor through a coupling, and the bottom of the motor is fixed on the ground through a bolt.
The hydraulic system comprises an oil tank, a first oil outlet of the oil tank is connected with a first main oil outlet pipe, a second hydraulic pump and a second check valve are sequentially arranged on the first main oil outlet pipe, a first main oil pipe at the rear end of the second check valve is divided into a first branch pipe, a second branch pipe and a third branch pipe, the first main oil pipe is respectively connected to the first hydraulic control reversing valve, the second hydraulic control reversing valve and a first port at the lower side of the electromagnetic reversing valve, the first hydraulic control reversing valve, the second hydraulic control reversing valve and a second port at the lower side of the electromagnetic reversing valve are respectively communicated with the oil tank through an oil return pipe, two ports at the upper side of the first hydraulic control reversing valve are respectively communicated with two oil holes of the first hydraulic cylinder through an oil pipe, two ports at the upper side of the second hydraulic control reversing valve are respectively communicated with two ends of a motor through an oil pipe, a fourth branch pipe led out from the third branch pipe is respectively communicated with an upper oil hole of the brake cylinder, the first overflow valve and the second overflow valve are respectively connected to the first main oil outlet pipe and the first branch pipe, and the other end of the overflow valve is communicated with the oil tank;
The other oil outlet of the oil tank is provided with a second main oil pipe connected with the main oil pipe in parallel, the second main oil pipe is connected to the rear end of a third check valve on the first branch pipe sequentially through a first hydraulic pump and a first check valve, the second main oil pipe is communicated with the second main oil pipe through a first sequence valve, the second main oil pipe is also connected with a third overflow valve, and the other end of the third overflow valve is communicated with the oil tank.
A hydraulic control one-way valve is respectively connected to two oil pipes I between the hydraulic control reversing valve I and the upper oil hole I and the lower oil hole I of the cylinder barrel of the hydraulic cylinder I; a speed regulating valve III and a one-way valve IV are respectively connected to two oil pipes II between the hydraulic control reversing valve II and an upper oil hole II and a lower oil hole II of a cylinder barrel II of the hydraulic cylinder, an electromagnetic reversing valve II is connected in parallel to two ends of the speed regulating valve III, and a sequence valve II is connected in parallel to two ends of the one-way valve IV; two oil pipes III communicated with the two ends of the motor are respectively provided with a first speed regulating valve and a second speed regulating valve.
Compared with the prior art, in the mechanical structure, firstly, the cantilever device can lift the object to be lifted to a higher height through the lifting action of the first hydraulic cylinder and the adjustment of the second hydraulic cylinder; secondly, the whole cantilever device can rotate 360 degrees around the vertical shaft, and can lift all objects in the range of 360 degrees around the lifting appliance; and then, due to the existence of the braking device, the motor stops rotating when braking is needed, and meanwhile, the braking device starts to work, so that the emergency braking effect is more sensitive, and the energy consumption can be saved.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a second schematic diagram of the structure of the present invention;
FIG. 3 is a schematic view of a portion of the enlarged structure of FIG. 2;
FIG. 4 is a third schematic diagram of the structure of the present invention;
FIG. 5 is a schematic perspective view of the first embodiment of the present invention;
FIG. 6 is a schematic diagram of a second perspective structure of the present invention;
FIG. 7 is a top view of a mounting arm of the present invention;
FIG. 8 is a cross-sectional view taken along the direction A-A of FIG. 7;
FIG. 9 is a cross-sectional view of a mounting arm of the present invention;
FIG. 10 is a schematic view of the structure of a moving block of the present invention;
FIG. 11 is a schematic view of a chassis of the present invention;
FIG. 12 is a schematic view of a portion of the enlarged construction of FIG. 11;
FIG. 13 is a schematic view of a first cylinder barrel, a second cylinder barrel, and a fixed rod of the present invention welded together;
FIG. 14 is a block diagram of a piston rod of the hydraulic cylinder of the present invention;
FIG. 15 is a schematic perspective view of a right clip of the present invention;
FIG. 16 is a schematic perspective view of a left clip of the present invention;
FIG. 17 is a schematic view of the left and right clips of the present invention after they are mounted together;
FIG. 18 is a schematic view of the left and right clips of the present invention after being mounted together;
FIG. 19 is a schematic view of a brake apparatus of the present invention;
fig. 20 is a schematic diagram of a hydraulic system of the present invention.
Detailed Description
In fig. 1, fig. 2, fig. 3 and fig. 4, the invention comprises a motor 13, a cantilever device, a braking device and a hydraulic system, wherein the cantilever device is arranged on the motor 13 and can rotate along with the motor to lift an article, the cantilever device comprises a first hydraulic cylinder (lifting cylinder) 6, a support arm 1 for lifting the article, a second hydraulic cylinder (amplitude changing cylinder) 5, the second hydraulic cylinder (amplitude changing cylinder) 5 is obliquely arranged between the first hydraulic cylinder (lifting cylinder) 6 and the support arm 1 and is used for supporting the support arm 1 to lift the article, the bottom of a cylinder barrel of the first hydraulic cylinder (lifting cylinder) 6 is vertically fixed on an output shaft of the motor 13, the top end of a piston rod 11 of the first hydraulic cylinder is hinged with one end of the support arm 1, a lifting hook for hanging the article is arranged at the other end of the support arm 1, a chute 24 is arranged on the lower surface of the support arm 1, the bottom of the cylinder barrel of the second hydraulic cylinder (amplitude changing cylinder) 5 is fixedly arranged at the upper end of the cylinder barrel of the first hydraulic cylinder (lifting cylinder) 6, the top end of the second hydraulic cylinder rod 3 is hinged with a moving block 2, and the other end of the moving block 2 is in sliding connection with the chute 24; the outer part of the cylinder barrel of the first hydraulic cylinder (lifting cylinder) 6 is provided with a chassis assembly, the chassis assembly comprises a chassis 15 and an outer barrel 8, the chassis 15 and the outer barrel 8 are concentrically arranged, the outer wall of the outer barrel 8 is provided with circular protrusions, the chassis 15 and the circular protrusions of the outer barrel 8 are welded and fixed through more than two supporting ribs 9, the inner wall of the outer barrel 8 is provided with two annular bosses 26, each annular boss 26 is provided with a bearing II matched with the outer wall of the cylinder barrel of the first hydraulic cylinder (lifting cylinder) 6, the chassis 15 is of a circular structure provided with a plurality of threaded holes, and the chassis 15 is fixed with the ground through bolts arranged in the threaded holes; the cylinder barrel of the first hydraulic cylinder (lifting cylinder) 6 is of a stepped cylindrical structure, the stepped cylindrical surface comprises a small cylindrical part and a large cylindrical part connected to the upper end of the small cylindrical surface, the diameter of the large cylindrical part is larger than the outer diameter of the outer cylinder 8, an annular groove is formed in the lower end face of the large cylindrical part, and a first bearing 7 is arranged between the annular groove and the outer wall of the outer cylinder 8; an annular stop block, a first piston and a second piston are sequentially arranged on a first piston rod 11 of a first hydraulic cylinder (lifting cylinder) 6 from top to bottom, and two first oil holes are formed in the outer wall of a cylinder barrel of the first hydraulic cylinder (lifting cylinder) 6;
the braking device comprises a braking cylinder 27 which is horizontally arranged, a braking cylinder piston rod 28 faces to one side of the output shaft of the motor 13, the top end of the braking cylinder piston rod 28 is connected with a braking plate which is used for holding the output shaft of the motor 13 tightly, the braking plate is provided with a circular arc groove, and the diameter of a circle where the circular arc groove is located is the same as the diameter of the output shaft of the motor 13.
In fig. 5 and 6, a fixing rod 18 is provided on the upper end surface of the large cylindrical portion of the first hydraulic cylinder (lifting cylinder) 6, and a positioning clamp for supporting the first hydraulic cylinder piston rod 11 in cooperation with the annular stopper is mounted on the fixing rod 18, and the upper end surface contacts with the annular stopper bottom surface 25 when the positioning clamp is closed.
In fig. 7, 8 and 9, the chute 24 has a T-shaped cross section.
In fig. 10, a hinge hole is provided at one end of the moving block 2, the other end of the moving block 2 is a cylindrical table matching with the wide portion of the chute 24, and an annular groove matching with the narrow portion of the chute 24 is provided on the cylindrical table.
In fig. 11 and 12, the chassis 15 and the annular protrusion of the outer cylinder 8 are welded and fixed by four supporting ribs 9, and two annular bosses 26 are arranged on the inner wall of the outer cylinder 8.
Fig. 13 is a schematic view of a first cylinder, a second cylinder, and a fixed rod welded together.
FIG. 14 is a schematic view of a piston rod structure of a hydraulic cylinder;
In fig. 15, 16, 17 and 18, a circular arc clamping part 20-1 with one end part of a right clamp 22 bent inwards is arranged at the other end part of the right clamp 22, a semicircular groove I is arranged at the middle part of the right clamp 22, a fixing rod mounting hole I21-1 is formed in the middle part of the right clamp 22, and a yielding groove is formed in the right clamp 22 along the radial direction of the fixing rod mounting hole I21-1; one end part of the left clamp 23 is provided with an inwards bent semicircular clamping second part 20-2, the other end part of the left clamp 23 is provided with a semicircular groove II matched with the semicircular groove I, the semicircular groove I and the semicircular groove II are combined to form a limiting rod mounting hole 19 for mounting a limiting rod, the middle part of the left clamp 23 is provided with a fixing rod mounting hole II 21-2, and the length of the mounting hole II 21-2 is matched with that of the abdicating groove; when the work of one day begins, the limiting rod is pulled out from the fixing rod mounting hole 19, then the right clamp 22 and the left clamp 23 are rotated to open the positioning clamp, and the piston rod 11 of the hydraulic cylinder is released; after the work of one day is finished, the positioning clamp is closed, then the limiting rod is installed in the installation hole 19 of the limiting rod, and at the moment, the right clamp 22 and the left clamp 23 cannot freely rotate around the fixing rod 18 due to the limitation of the limiting rod, so that the positioning clamp is matched with the annular stop bottom surface 25 of the hydraulic cylinder-piston rod 11 to clamp and fix the hydraulic cylinder-piston rod 11 at a specified position.
In fig. 19, a bracket 29 is arranged at the lower end of the brake cylinder 27, a spring 32 is arranged in a rodless cavity between the piston of the brake cylinder 27 and the bottom of the cylinder barrel, a rod cavity is arranged between the piston of the brake cylinder 27 and the top end of the cylinder barrel, an oil hole III is arranged on the inner wall of the rod cavity, the spring 32 and pressure oil entering through the oil hole III form a pair of interaction forces, when the oil hole III does not have pressure oil entering, a U-shaped groove on a brake plate at the upper top end of a piston rod of the brake cylinder 27 props against an output shaft of the motor 13 under the action of the spring 23, the motor 13 stops rotating, and a hydraulic cylinder I (lifting cylinder) 6 also stops rotating accordingly. After the pressure oil enters from the oil hole III, the pressure oil compresses the spring, and the piston rod of the brake cylinder is retracted to drive the U-shaped groove on the brake plate to be separated from the output shaft of the motor 13, so that the rotary motor 13 and the hydraulic cylinder I (lifting cylinder) 6 continue to rotate.
In fig. 20, the hydraulic system comprises an oil tank, a first oil outlet of the oil tank is connected with a first main oil outlet pipe, a second hydraulic pump 100-2 and a second check valve 105 are sequentially arranged on the first main oil outlet pipe, a first main oil pipe at the rear end of the second check valve 105 is divided into a first branch pipe, a second branch pipe and a third branch pipe which are respectively connected to a first hydraulic control reversing valve 112, a second hydraulic control reversing valve 113 and a first port at the lower side of an electromagnetic reversing valve 111, the first hydraulic control reversing valve 112, the second hydraulic control reversing valve 113 and the second port at the lower side of the electromagnetic reversing valve 111 are communicated with the oil tank through an oil return pipe, two ports at the upper side of the first hydraulic control reversing valve 112 are respectively communicated with two oil holes of a first hydraulic cylinder (lifting cylinder) 6 through a first oil pipe, two ports at the upper side of the second hydraulic control reversing valve 113 are respectively communicated with two oil holes of a second hydraulic cylinder (amplitude cylinder) 5 through a third oil pipe, two ports at the upper side of the electromagnetic reversing valve 111 are respectively communicated with two ends of a motor 13, a fourth branch pipe led out from the third branch pipe is communicated with a brake cylinder 27, and two overflow valves 127, two overflow valves 127 and two overflow valves 110 are respectively connected to the upper side of the main oil outlet pipe and the first branch pipe and the main oil outlet pipe are respectively communicated with the overflow valves and the overflow valves 110;
A second main oil pipe connected in parallel with the first main oil pipe is arranged on the other oil outlet of the oil tank, the second main oil pipe is connected to the rear end of a third check valve 107 on the first branch pipe sequentially through a first hydraulic pump 100-1 and a first check valve 104, the second main oil pipe is communicated with the first main oil pipe through a sequence valve 106, the second main oil pipe is also connected with a third overflow valve 101, the other end of the third overflow valve 101 is communicated with the oil tank, and a first hydraulic control reversing valve 112 and a second hydraulic control reversing valve 113 are adopted as reversing valves of the hydraulic cylinder, so that the conversion between movements can be stable; the double pumps are adopted to supply oil to the system at the same time, and the double pump unloading loop can well realize the quick and slow switching of the executing mechanism and has the effect of energy conservation; the first main oil outlet pipe and the second main oil pipe are connected with a pressure gauge through a stop valve;
Furthermore, a hydraulic control one-way valve is respectively connected to two oil pipes I between the hydraulic control reversing valve I112 and the upper oil hole and the lower oil hole of the hydraulic cylinder I (lifting cylinder) 6, so that the hydraulic cylinder I (lifting cylinder) 6 is prevented from shaking due to leakage of oil liquid caused by external force action, and the working process is more stable; a speed regulating valve III 121 and a one-way valve IV 119 are respectively connected to two oil pipes between the hydraulic control reversing valve II 113 and the upper and lower oil holes of the hydraulic cylinder II (amplitude cylinder) 5, an electromagnetic reversing valve II 120 is connected in parallel to two ends of the speed regulating valve III 121, a sequence valve II 118 is connected in parallel to two ends of the one-way valve IV 119, the sequence valve II 118 is arranged and used as a back pressure valve, and the piston rods of the hydraulic cylinder II 3 and the hydraulic cylinder II (amplitude cylinder) 5 are prevented from rapidly descending to generate impact; two oil pipes III communicated with two ends of the motor 13 are respectively provided with a first speed regulating valve 114 and a second speed regulating valve 115.
The working principle of the hydraulic system is as follows:
In the initial state, the first piston rod 11 of the hydraulic cylinder is in a state of extending to the limit, and the second piston rod 3 of the hydraulic cylinder is in a state of retracting;
if the lifting cylinder moves first, the first hydraulic cylinder (lifting cylinder) 6 moves rapidly, at the moment, the first hydraulic pump 100-1 and the second hydraulic pump 100-2 supply oil at the same time, after the hydraulic pump enters the working movement, the system pressure rises to open the third overflow valve 101, the first hydraulic pump 100-1 is unloaded from the third overflow valve 101, the second hydraulic pump 100-2 supplies oil to the system independently, and the second overflow valve 110 controls the system pressure; when the first hydraulic cylinder (lifting cylinder) 6 moves to a designated position, the pressure of an oil way leading to the valve 112 is increased, the first sequence valve 106 is opened, the first hydraulic pump 100-1 and the second hydraulic pump 100-2 simultaneously supply oil to the second hydraulic cylinder (amplitude cylinder) 5, at the moment, the pressure of the system is controlled by the first overflow valve 127, when the amplitude cylinder enters into the working movement, the pressure of the system is increased, the third overflow valve 101 is opened, the first hydraulic pump 100-1 is unloaded from the third overflow valve 101, and the second hydraulic pump 100-2 supplies oil to the system independently;
Also, if the second hydraulic cylinder (luffing cylinder) 5 moves first, the system oil supply is similar to that described above.
The following oil flow directions are:
a. when the first hydraulic cylinder (lifting cylinder) 6 starts to fast forward, the oil flow route of the system is as follows:
An oil inlet path:
100-1 of a hydraulic pump, 104 of a one-way valve, 125 of a one-way valve, 112 of a right cavity of a hydraulic control reversing valve, 124 of a hydraulic control one-way valve and 6 of a hydraulic cylinder (lifting cylinder);
100-2 of a second hydraulic pump, 105 of a second check valve, 107 of a third check valve, 125 of a fourth check valve, 112 of a right cavity of a first hydraulic control reversing valve, 124 of a second hydraulic control check valve, and a rodless cavity of a first hydraulic cylinder (lifting cylinder) 6; (at this time, the working pressure is set by the relief valve II 110)
And (3) oil return:
A rod cavity of a hydraulic cylinder I (lifting cylinder) 6, a hydraulic control one-way valve I123, a speed regulating valve IV 122, a hydraulic control reversing valve I112 and an oil tank;
b. When the first hydraulic cylinder (lifting cylinder) 6 starts to work, the oil flow route of the system is as follows:
An oil inlet path:
100-1 of a first hydraulic pump, three 101 of an overflow valve and an oil tank;
100-2 of a second hydraulic pump, 105 of a second check valve, 107 of a third check valve, 125 of a fourth check valve, 112 of a right cavity of a first hydraulic control reversing valve, 124 of a second hydraulic control check valve, and a rodless cavity of a first hydraulic cylinder (lifting cylinder) 6; (at this time, the working pressure is set by the relief valve II 110)
And (3) oil return:
A rod cavity of a hydraulic cylinder I (lifting cylinder) 6, a hydraulic control one-way valve I123, a speed regulating valve IV 122, a hydraulic control reversing valve I112 and an oil tank;
c. when the hydraulic cylinder II (amplitude cylinder) 5 starts to fast forward, the oil flow route of the system is as follows:
An oil inlet path:
100-1 parts of a hydraulic pump, 104 parts of a one-way valve, 106 parts of a sequence valve, 113 left cavities of a hydraulic control reversing valve II, 119 parts of a one-way valve II and 5 parts of a hydraulic cylinder II (amplitude cylinder);
100-2 of a second hydraulic pump, 105 of a second check valve, 113 left cavities of a second hydraulic control reversing valve, 119 of a fifth check valve and 5 of a second hydraulic cylinder (amplitude cylinder); (at this time, the working pressure is set by the relief valve one 127)
And (3) oil return:
A rod cavity of a hydraulic cylinder II (amplitude changing cylinder) 5, a speed regulating valve III 121, a right cavity of a hydraulic control reversing valve II 113 and an oil tank;
d. When the hydraulic cylinder II (amplitude cylinder) 5 starts to work, the oil flow route of the system is as follows:
An oil inlet path:
100-1 of a first hydraulic pump, three 101 of an overflow valve and an oil tank;
100-2 of a second hydraulic pump, 105 of a second check valve, 113 left cavities of a second hydraulic control reversing valve, 119 of a fifth check valve and 5 of a second hydraulic cylinder (amplitude cylinder); (at this time, the working pressure is set by the relief valve one 127)
And (3) oil return:
A rod cavity of a hydraulic cylinder II (amplitude changing cylinder) 5, a speed regulating valve III 121, a right cavity of a hydraulic control reversing valve II 113 and an oil tank;
e. when the first hydraulic cylinder (lifting cylinder) 6 starts to fast retract, the oil flow route of the system is as follows:
An oil inlet path:
100-1 of a hydraulic pump, 104 of a one-way valve, 125 of a one-way valve, 112 of a right cavity of a hydraulic control reversing valve, 122 of a speed regulating valve, 123 of a hydraulic control one-way valve and 6 of a hydraulic cylinder (lifting cylinder);
100-2 of a second hydraulic pump, 105 of a second check valve, 107 of a third check valve, 125 of a fourth check valve, 112 of a right cavity of a first hydraulic control reversing valve, 122 of a speed regulating valve, 123 of a first hydraulic control check valve and 6 of a first hydraulic cylinder (lifting cylinder); (at this time, the working pressure is set by the relief valve II 110)
And (3) oil return:
rodless cavity of a first hydraulic cylinder (lifting cylinder) 6, a second hydraulic control one-way valve 124, a right cavity of a first hydraulic control reversing valve 112 and an oil tank;
f. when the first hydraulic cylinder (lifting cylinder) 6 starts to slowly retract, the oil flow route of the system is as follows:
An oil inlet path:
100-1 of a first hydraulic pump, three 101 of an overflow valve and an oil tank;
100-2 of a second hydraulic pump, 105 of a second check valve, 107 of a third check valve, 125 of a fourth check valve, 112 of a right cavity of a first hydraulic control reversing valve, 122 of a speed regulating valve, 123 of a first hydraulic control check valve and 6 of a first hydraulic cylinder (lifting cylinder); (at this time, the working pressure is set by the relief valve II 110)
And (3) oil return:
rodless cavity of a first hydraulic cylinder (lifting cylinder) 6, a second hydraulic control one-way valve 124, a left cavity of a first hydraulic control reversing valve 112 and an oil tank;
g. when the second hydraulic cylinder (amplitude cylinder) 5 starts to fast retreat, the oil flow route of the system is as follows:
An oil inlet path:
100-1 parts of a hydraulic pump, 104 parts of a one-way valve, 106 parts of a sequence valve, 113 right cavities of a hydraulic control reversing valve II, 120 parts of an electromagnetic reversing valve II and 5 parts of a rod cavity of a hydraulic cylinder II (amplitude cylinder);
100-2 parts of a second hydraulic pump, 105 parts of a second check valve, 113 parts of a second hydraulic control reversing valve, 120 parts of an electromagnetic reversing valve and 5 parts of a second hydraulic cylinder (amplitude cylinder) with a rod cavity; (at this time, the working pressure is set by the relief valve one 127)
And (3) oil return:
rodless cavity of a second hydraulic cylinder (amplitude changing cylinder) 5, a second sequence valve 118, a left cavity of a second hydraulic control reversing valve 113 and an oil tank;
h. When the amplitude cylinder starts to slowly retreat, the oil flow route of the system is as follows:
An oil inlet path:
100-1 of a first hydraulic pump, three 101 of an overflow valve and an oil tank;
100-2 parts of a second hydraulic pump, 105 parts of a second check valve, 113 parts of a second hydraulic control reversing valve, 120 parts of an electromagnetic reversing valve and 5 parts of a second hydraulic cylinder (amplitude cylinder) with a rod cavity; (at this time, the working pressure is set by the relief valve one 127)
And (3) oil return:
rodless cavity of a second hydraulic cylinder (amplitude changing cylinder) 5, a second sequence valve 118, a left cavity of a second hydraulic control reversing valve 113 and an oil tank;
i. when the motor 13 rotates forward:
An oil inlet path:
100-1 of a hydraulic pump, 104 of a one-way valve, 106 of a sequence valve, a left cavity of a solenoid directional valve 111, 114 of a speed regulating valve and 13 of a motor;
100-2 of a second hydraulic pump, 105 of a second check valve, a left cavity of a first electromagnetic reversing valve 111, 114 of a first speed regulating valve and 13 of a motor;
And (3) oil return:
Motor 13- & gt speed regulating valve II 15- & gt right cavity of electromagnetic directional valve I111- & gt oil tank;
k. When the motor 13 is reversed:
An oil inlet path:
100-1 of a hydraulic pump, 104 of a one-way valve, 106 of a sequence valve, a right cavity of a first electromagnetic reversing valve 111, 105 of a two-way valve and 13 of a motor;
100-2 of a second hydraulic pump, 105 of a second check valve, a right cavity of a first electromagnetic reversing valve 111, 105 of the second check valve and 13 of a motor;
And (3) oil return:
Motor 13- & gt speed regulating valve one 114- & gt right cavity of electromagnetic directional valve one 111- & gt oil tank;
j. When the brake cylinder 27 brakes:
The first electromagnetic directional valve 111 is switched to the middle position, the first hydraulic pump 100-1 and the second hydraulic pump 100-2 are unloaded through the first electromagnetic directional valve 111, no oil or little oil enters a rod cavity of the brake cylinder 27 at this time, and the motor 13 slowly stops rotating due to the entering of the oil-free liquid at this time, but due to emergency braking, the rotation of the motor 13 due to inertia is overcome, and the inertia rotation is braked by the brake cylinder 27;
since the oilless fluid flows into the rod chamber of the brake cylinder 27, the top of the piston rod of the brake cylinder 17 is pressed against the rotating shaft of the motor 13 by the spring force of the brake cylinder 27, and the rotation of the swing motor 13 is stopped.
M, brake cylinder 27 is retracted:
hydraulic pump one 100-1 → check valve one 104 → sequence valve one 106 → rod cavity of brake cylinder 27
Hydraulic pump two 100-2 → check valve two 105 → rod cavity of brake cylinder 27
The residual oil flows back to the oil tank from the overflow valve 127
At this time, the oil flows into the rod cavity of the brake cylinder 27, and when the oil pressure of the rod cavity is larger than the spring force of the brake cylinder 27, the piston rod of the brake cylinder 27 is separated from the rotating shaft of the motor, so that the rotary motor continues to rotate.
Claims (7)
1. A rotatable hoist of diaxon, its characterized in that: comprises a motor (13), a lifting cantilever device which is arranged on the motor (13) and can rotate along with the motor, and a braking device for braking the motor (13);
The cantilever device comprises a first hydraulic cylinder (6) for lifting, a support arm (1) for lifting an article, a second hydraulic cylinder (5) obliquely arranged between the first hydraulic cylinder (6) and the support arm (1) and used for supporting the support arm (1) to lift, wherein the bottom of a cylinder barrel of the first hydraulic cylinder (6) is vertically and fixedly arranged on an output shaft of a motor (13), the top end of a piston rod (11) of the first hydraulic cylinder is hinged with one end of the support arm (1), a lifting hook for hanging the article is arranged at the other end of the support arm (1), a sliding groove (24) is arranged on the lower surface of the support arm (1), the bottom of the cylinder barrel of the second hydraulic cylinder (5) is fixedly arranged at the upper end of the cylinder barrel of the first hydraulic cylinder (6), a moving block (2) is hinged at the top end of the piston rod (3), and the other end of the moving block (2) is in sliding connection with the sliding groove (24);
The braking device comprises a braking cylinder (27) which is horizontally arranged, a piston rod (28) of the braking cylinder is opposite to one side of an output shaft of the motor (13), the top end of the piston rod (28) of the braking cylinder is connected with a braking plate which is used for holding the output shaft of the motor (13), the braking plate is provided with a circular arc groove, and the diameter of the circle where the circular arc groove is positioned is the same as the diameter of the output shaft of the motor (13);
the hydraulic system is used for providing a power source for the motor (13), the first hydraulic cylinder (6), the second hydraulic cylinder (5) and the brake cylinder (27);
The hydraulic cylinder I (6) is characterized in that a chassis assembly is arranged outside a cylinder barrel of the hydraulic cylinder I (6), a chassis (15) of the chassis assembly is sleeved on an outer cylinder (8) outside the cylinder barrel of the hydraulic cylinder I (6), the center of the chassis (15) is mutually aligned with the center of the outer cylinder (8), annular protrusions are arranged on the outer wall of the outer cylinder (8), the chassis (15) and the annular protrusions of the outer cylinder (8) are welded and fixed through more than two supporting ribs (9), more than one annular boss is arranged on the inner wall of the outer cylinder (8), a bearing II matched with the outer wall of the cylinder barrel of the hydraulic cylinder I (6) is arranged on each annular boss, the chassis (15) is of an annular structure provided with a plurality of threaded holes, and the chassis (15) is fixed with the ground through bolts arranged in the threaded holes;
The cylinder barrel of the first hydraulic cylinder (6) is of a stepped cylindrical structure, the stepped cylindrical surface comprises a small cylindrical part and a large cylindrical part connected to the upper end of the small cylindrical surface, the diameter of the large cylindrical part is larger than the outer diameter of the outer cylinder (8), an annular groove is formed in the lower end face of the large cylindrical part, and a first bearing (7) is arranged between the annular groove and the outer wall of the outer cylinder (8); an annular stop block, a first piston and a second piston are sequentially arranged on a first piston rod (11) of a first hydraulic cylinder (6) from top to bottom, and two first oil holes are formed in the outer wall of a cylinder barrel of the first hydraulic cylinder (6);
The hydraulic system comprises an oil tank, a first main oil outlet pipe is connected to an oil outlet of the oil tank, a second hydraulic pump (100-2) and a second check valve (105) are sequentially arranged on the first main oil outlet pipe, a first main oil pipe at the rear end of the second check valve (105) is divided into a first branch pipe, a second branch pipe and a third branch pipe which are respectively connected to a first hydraulic control reversing valve (112), a second hydraulic control reversing valve (113) and a first port at the lower side of the first electromagnetic reversing valve (111), the first hydraulic control reversing valve (112), the second hydraulic control reversing valve (113) and a second port at the lower side of the first electromagnetic reversing valve (111) are respectively communicated with the oil tank through an oil return pipe, two ports at the upper side of the first hydraulic control reversing valve (112) are respectively communicated with two oil holes of a first hydraulic cylinder (6) through an oil pipe, two ports at the upper side of the first hydraulic control reversing valve (113) are respectively communicated with two ends of a motor (13) through a third oil pipe, four branches led out from the third branch pipe are respectively communicated with a third oil hole (27) at the upper side of the third hydraulic control reversing valve (111), and the first overflow valve (110) and the second overflow valve (110) are respectively communicated with the other end of the oil tank;
The other oil outlet of the oil tank is provided with a second main oil pipe connected with the main oil pipe in parallel, the second main oil pipe is connected to the rear end of a third check valve (107) on the first branch pipe sequentially through a first hydraulic pump (100-1) and a first check valve (104), the second main oil pipe is communicated with the second main oil pipe through a first sequence valve (106), the second main oil pipe is also connected with a third overflow valve (101), and the other end of the third overflow valve (101) is communicated with the oil tank.
2. A two-axis pivotable spreader according to claim 1, wherein: the hydraulic cylinder I (6) is characterized in that a fixing rod (18) is arranged on the upper end face of a large cylindrical part of the hydraulic cylinder I, a positioning clamp for supporting a piston rod (11) of the hydraulic cylinder I in a matched mode with an annular stop block is arranged on the fixing rod (18), the positioning clamp comprises a right clamp (22) and a left clamp (23), one end part of the right clamp (22) is inwards bent to form an arc-shaped clamping part (20-1), a semicircular groove I is formed in the other end part of the right clamp (22), a fixing rod mounting hole I (21-1) is formed in the middle of the right clamp (22), and a yielding groove is formed in the right clamp (22) along the radial direction of the fixing rod mounting hole I (21-1); one end part of the left clamp (23) is provided with a semicircular clamping second part (20-2) which is bent inwards, the other end part of the left clamp (23) is provided with a semicircular groove II which is matched with the semicircular groove I, the semicircular groove I and the semicircular groove II are combined to form a limiting rod mounting hole (19) for mounting the fixing rod (18), the middle part of the left clamp (23) is provided with a fixing rod mounting hole II (21-2), and the length of the fixing rod mounting hole II (21-2) is matched with the abdicating groove; the upper end surface contacts with the bottom surface (25) of the annular stop block when the positioning clamp is closed.
3. A two-axis pivotable spreader according to claim 1, wherein: the chassis (15) and the circular protrusions of the outer cylinder (8) are welded and fixed through four supporting ribs (9), and two annular bosses are arranged on the inner wall of the outer cylinder (8).
4. A two-axis pivotable spreader according to claim 1, wherein: the section of the sliding groove (24) is of a T-shaped structure, a hinge hole is formed in one end part of the moving block (2), a cylindrical table matched with the wide part of the sliding groove (24) is arranged at the other end part of the moving block (2), and an annular groove matched with the narrow part of the sliding groove (24) is formed in the cylindrical table.
5. A two-axis pivotable spreader according to claim 1, wherein: a support (29) is arranged at the lower end of the brake cylinder (27), a spring (32) is arranged in a rodless cavity between a piston of the brake cylinder (27) and the bottom of the cylinder barrel, a rod cavity is arranged between the piston of the brake cylinder (27) and the top end of the cylinder barrel, and an oil hole III is formed in the inner wall of the rod cavity.
6. A two-axis pivotable spreader according to claim 1, wherein: the bottom end of the cylinder barrel of the first hydraulic cylinder (6) is connected with an extending shaft (12), the shaft (12) is connected with an output shaft of a motor (13) through a coupling, and the bottom of the motor (13) is fixed on the ground through a bolt (14).
7. A two-axis pivotable spreader according to claim 1, wherein: a hydraulic control one-way valve is respectively connected to two oil pipes I between the hydraulic control reversing valve I (112) and the upper oil hole I and the lower oil hole I of the cylinder barrel of the hydraulic cylinder I (6); a speed regulating valve III (121) and a check valve IV (119) are respectively connected to two oil pipes II between the hydraulic control reversing valve II (113) and the upper oil hole II and the lower oil hole II of the cylinder barrel of the hydraulic cylinder II (5), two ends of the speed regulating valve III (121) are connected with an electromagnetic reversing valve II (120) in parallel, and two ends of the check valve IV (119) are connected with a sequence valve II (118) in parallel; two oil pipes III communicated with two ends of the motor (13) are respectively provided with a first speed regulating valve (114) and a second speed regulating valve (115).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022170.9A CN111302234B (en) | 2019-10-25 | 2019-10-25 | Lifting appliance with rotatable two shafts |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022170.9A CN111302234B (en) | 2019-10-25 | 2019-10-25 | Lifting appliance with rotatable two shafts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111302234A CN111302234A (en) | 2020-06-19 |
| CN111302234B true CN111302234B (en) | 2024-05-24 |
Family
ID=71158071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911022170.9A Active CN111302234B (en) | 2019-10-25 | 2019-10-25 | Lifting appliance with rotatable two shafts |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111302234B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115402952A (en) * | 2022-09-16 | 2022-11-29 | 无锡宏锦液压技术有限公司 | Movable type pulling and loading machine |
| CN118270671B (en) * | 2024-06-03 | 2024-08-09 | 兰州兰东建筑安装工程有限公司 | Safe hoisting and unloading device for building engineering construction |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8614966D0 (en) * | 1985-06-20 | 1986-07-23 | Honda Motor Co Ltd | Hydraulic braking pressure |
| JP2006144917A (en) * | 2004-11-19 | 2006-06-08 | Shin Meiwa Ind Co Ltd | Hydraulic circuit for cargo receiving plate lifter |
| CN105114392A (en) * | 2015-09-25 | 2015-12-02 | 圣邦集团有限公司 | Oil cylinder, totally-closed hydraulic system with oil cylinders and control method |
| CN205998483U (en) * | 2016-08-09 | 2017-03-08 | 泸州洪兴环卫设备有限公司 | A kind of hydraulic system of hoisting formula garbage transfer station |
| CN107010550A (en) * | 2017-05-17 | 2017-08-04 | 李瑞平 | A kind of counterweight can adjust cantilever type rotating crane |
| CN107746017A (en) * | 2017-10-11 | 2018-03-02 | 长兴能工机械有限公司 | A kind of mechanical lifting engineering machinery transfer device |
| CN108455465A (en) * | 2018-04-04 | 2018-08-28 | 温州伊诺韦特科技有限公司 | A kind of tower crane support base and its installation method |
| CN211366753U (en) * | 2019-10-25 | 2020-08-28 | 湖北江山专用汽车有限公司 | Lifting appliance with rotatable two shafts |
| CN211664600U (en) * | 2019-10-25 | 2020-10-13 | 湖北江山专用汽车有限公司 | Cantilever lifting appliance |
-
2019
- 2019-10-25 CN CN201911022170.9A patent/CN111302234B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8614966D0 (en) * | 1985-06-20 | 1986-07-23 | Honda Motor Co Ltd | Hydraulic braking pressure |
| JP2006144917A (en) * | 2004-11-19 | 2006-06-08 | Shin Meiwa Ind Co Ltd | Hydraulic circuit for cargo receiving plate lifter |
| CN105114392A (en) * | 2015-09-25 | 2015-12-02 | 圣邦集团有限公司 | Oil cylinder, totally-closed hydraulic system with oil cylinders and control method |
| CN205998483U (en) * | 2016-08-09 | 2017-03-08 | 泸州洪兴环卫设备有限公司 | A kind of hydraulic system of hoisting formula garbage transfer station |
| CN107010550A (en) * | 2017-05-17 | 2017-08-04 | 李瑞平 | A kind of counterweight can adjust cantilever type rotating crane |
| CN107746017A (en) * | 2017-10-11 | 2018-03-02 | 长兴能工机械有限公司 | A kind of mechanical lifting engineering machinery transfer device |
| CN108455465A (en) * | 2018-04-04 | 2018-08-28 | 温州伊诺韦特科技有限公司 | A kind of tower crane support base and its installation method |
| CN211366753U (en) * | 2019-10-25 | 2020-08-28 | 湖北江山专用汽车有限公司 | Lifting appliance with rotatable two shafts |
| CN211664600U (en) * | 2019-10-25 | 2020-10-13 | 湖北江山专用汽车有限公司 | Cantilever lifting appliance |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111302234A (en) | 2020-06-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111302234B (en) | Lifting appliance with rotatable two shafts | |
| CN101638980B (en) | Full-balance hydraulic transmission oil sucking machine | |
| CN202642852U (en) | Simple industrial manipulator | |
| CN202880475U (en) | Rotatable simple industry mechanical arm | |
| CN201362560Y (en) | Wave compensating device | |
| CN104416396A (en) | Hydraulic drive type clamping device | |
| CN211366753U (en) | Lifting appliance with rotatable two shafts | |
| CN1657393A (en) | Push and pull cylinder variable frequency energy-saving hydraulic elevator system of balancing load by accumulator loop | |
| CN102900400A (en) | Compact hydraulic oil pumping machine adopting composited pneumatic-hydraulic cylinder | |
| CN115091497A (en) | Automatic change manipulator | |
| CN104828719A (en) | Crane and rotational weight-balancing device thereof | |
| CN209856133U (en) | Hydraulic system of side stand machine and side stand machine | |
| CN110608016A (en) | Beam type balance energy-saving oil pumping machine | |
| CN202970633U (en) | Full-automatic hydraulic pumping unit | |
| CN102259394A (en) | Splitter | |
| CN207046725U (en) | A kind of lorry-mounted crane boom hoisting | |
| CN202704864U (en) | Hydro-cylinder driving container crane hoisting mechanism and container crane | |
| CN215292775U (en) | Pneumatic double-liquid synchronous grouting pump | |
| CN202174655U (en) | Splitting machine | |
| CN214720306U (en) | Clamping and overturning device for casting and forging operation | |
| CN105889373B (en) | The normally closed disc brake apparatus of aqueous medium with pressurized cylinder | |
| CN210738528U (en) | Beam type balance energy-saving oil pumping machine | |
| CN202296849U (en) | Crane landing leg, landing leg hydraulic system and crane | |
| CN206915698U (en) | A kind of multi-functional carrying device | |
| CN107271288B (en) | 10,000 tons load testing machine moving beam lifting system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |