CN210524184U

CN210524184U - Suspension type self-balancing hydraulic lifting device

Info

Publication number: CN210524184U
Application number: CN201921422845.4U
Authority: CN
Inventors: 常勇
Original assignee: Foshan Beyond Laser Technology Co Ltd
Current assignee: Guangdong Hongshi Laser Technology Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-05-15
Anticipated expiration: 2029-08-29

Abstract

The utility model discloses a suspension type self-balancing hydraulic lifting device, which comprises a bracket, a synchronous motor, a lifting device and a hydraulic station; the center of the bracket extends along the length direction and the width direction to form an X axis and a Y axis respectively, and the four lifting devices are symmetrically arranged along the X axis and the Y axis; the lifting device comprises a hydraulic cylinder, supporting blocks and positioning blocks, a movable rod of the hydraulic cylinder is connected with the supporting blocks, the positioning blocks and the supporting blocks are arranged on the lower surface of the support in a one-to-one correspondence manner, and the positioning blocks are detachably abutted to the surfaces of the supporting blocks in a tangent manner; the synchronous motor is arranged at the intersection point of the X axis and the Y axis; the lifting device of the utility model can not be blocked in the lifting process; the verticality of the lifting device has no strict requirement, and the production cost is low; hydraulic power is adopted, so that the bearing load is high, the lifting is stable, and the stopping position is accurate; the whole structure is stable.

Description

Suspension type self-balancing hydraulic lifting device

Technical Field

The utility model relates to a work platform's elevating gear field, concretely relates to suspension type self-balancing hydraulic pressure elevating gear.

Background

At present, when plane laser cutting, along with the rising of laser cutting machine power, the increase of cutting board thickness, the increase of cutting breadth, the drawback of original exchange platform that goes up and down through motor reducer drive gear cam structure is bigger and bigger, mainly has with high costs, can overshoot during the stop, stops inaccurate problem.

Referring to fig. 1, the domestic current hydraulic lifting platform has four hydraulic cylinders for lifting, and four guide pillars 101 for guiding, the hydraulic cylinders are connected with guide rings 102, the guide rings 102 are sleeved in the guide pillars 101, and the existing structure has the following disadvantages: it will be guaranteed that every guide pillar 101 will be perpendicular with the horizontal plane, causes the cost to improve, and the installation degree of difficulty is big, and if the pneumatic cylinder appears can the card die when asynchronous.

Accordingly, there is a great need for an improved hydraulic lift apparatus.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a suspension type self-balancing hydraulic pressure elevating gear, it includes support, synchronous motor, four elevating gear, hydraulic pressure station, guider and protective sheath, this suspension type self-balancing hydraulic pressure elevating gear have can bear the load height, go up and down steadily, the off-position is accurate, can not block dead, low in production cost, stable in structure's advantage.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a suspension type self-balancing hydraulic lifting device comprises a rectangular bracket, a synchronous motor, four lifting devices and a hydraulic station; the center of the support extends along the length direction and extends along the width direction to form an X axis and a Y axis respectively, the four lifting devices are positioned at two opposite sides of the support, two lifting devices are arranged at each of the two opposite sides of the support, the lifting devices at the two opposite sides are symmetrically arranged by taking the X axis as a central line, and the two lifting devices at the same side are symmetrically arranged by taking the Y axis as a central line;

the four lifting devices respectively comprise a hydraulic cylinder, supporting blocks and positioning blocks, the hydraulic cylinder comprises a movable rod, the movable rod is connected with the supporting blocks, the positioning blocks and the supporting blocks are arranged on the lower surface of the support in a one-to-one correspondence manner, and the positioning blocks are detachably abutted against the surfaces of the supporting blocks in a tangent manner;

the synchronous motor is arranged at the intersection of the X axis and the Y axis and comprises a main oil path and a branch oil path, the main oil path is connected with the hydraulic station, and the branch oil path is connected with the hydraulic cylinder.

Preferably, the upper surface of the supporting block is provided with a conical groove, the lower surface of the positioning block is provided with a spherical surface, and the spherical surface tangentially abuts against the conical groove; even if the verticality of the hydraulic cylinder of one lifting device and the horizontal plane slightly deviates, the spherical surface and the conical surface groove can be in tangential collision at different angles so as to support the bracket; even if the hydraulic cylinder of one lifting device fails asynchronously, the spherical surface of the corresponding positioning block is separated from the conical surface groove of the supporting block, and the other lifting devices support the bracket to keep balance and continue to ascend, so that the ascending process of the integral suspension type self-balancing hydraulic lifting device is not influenced, the lifting device can still slowly ascend to a specified height, and the conical surface groove is in tangential contact with the spherical surface again; the spherical surface is in tangential contact with the conical surface groove, so that the supporting block can bear high load.

Preferably, the hydraulic cylinder further comprises a guide device, the guide device comprises two guide rails and rollers, the lifting device further comprises a connecting plate, a fixed plate and a movable plate, the hydraulic cylinder further comprises a fixed rod, the fixed rod is arranged on the fixed plate, the two guide rails are symmetrically arranged on the fixed plate by taking the axis of the hydraulic cylinder as a central line, and the connecting line of the two guide rails is parallel to the X axis; the movable plate is provided with a roller, the connecting plate fixedly connects the movable rod with the movable plate, and the outer diameter of the roller is tangentially abutted against the guide rail; one side of the movable plate, which is far away from the movable rod, is fixedly connected with the supporting block, and through the arrangement, the movable plate plays a role in guiding the lifting process of the lifting device and can reduce the stress condition of the lifting device.

Preferably, the roller comprises a supporting roller and a guiding roller, the guiding rail comprises a front surface facing the hydraulic cylinder and a back surface arranged opposite to the front surface, the back surface of the guiding rail is provided with a groove extending along a vertical direction, the groove comprises a bottom surface and two side surfaces, the supporting roller is arranged in the groove, and the supporting roller is only in tangential contact with one side surface of the groove; guide roller sets up guide rail the front, just guide roller with openly tangent conflict, through setting up like this, supporting roller can bear very big load, and supporting roller with guide roller reduces frictional force at the lift in-process, guarantees that whole elevating gear can not block at the in-process of going up and down and dies.

Preferably, the grooves comprise an upper groove and a lower groove, the vertical distance between two side surfaces of the upper groove is 1.05-1.10 times of the outer diameter of the supporting roller, and the vertical distance between two side surfaces of the lower groove is 0.9 times of the outer diameter of the supporting roller, so that the vertical distance between two side surfaces of the upper groove is 1.05-1.10 times of the outer diameter of the supporting roller, the supporting roller is guaranteed to be only tangentially abutted against one side surface, and when a large load is borne, the guide device can deform, and a space for deformation is reserved; the vertical distance between the two side surfaces of the lower groove is 0.9 times of the outer diameter of the supporting roller, so that the whole lifting device has a limiting effect when falling to the lowest point, and the lifting device also has the limiting effect when falling under the dead weight when the hydraulic cylinder breaks down.

Preferably, at least two support rollers and at least two guide rollers are arranged on each guide rail, and by such arrangement, if only one support roller and one guide roller are arranged, when the bracket bears a load, a bending moment is generated at the centers of the support rollers and the guide rollers, and the bending moment cannot be offset; on the contrary, the supporting rollers and the guiding rollers are at least more than two, and the supporting rollers and the guiding rollers are abutted against the guiding track to form reverse bending moment so as to offset the bending moment generated by bearing load.

Preferably, two sides on the top of upper groove are equipped with the chamfer structure, through setting up like this, because supporting roller reaches guide roller fixed connection is in the fly leaf, just supporting roller reaches guide roller with the tangent conflict of direction track the top of recess is equipped with the chamfer structure and is convenient for supporting roller follows the top of upper groove sinks into the direction track on the upper groove.

Preferably, the fixing rod is provided with a fine adjustment nut, the fine adjustment nut abuts against the lower portion of the connecting plate, and through the arrangement, when the suspended self-balancing hydraulic lifting device is arranged on an uneven ground, the fine adjustment nut can be adjusted, so that the lifting device is located on the same horizontal plane, in other words, the support is ensured to be horizontally suspended on the lifting device.

Preferably, the fixing device further comprises a protective sleeve, wherein the protective sleeve comprises an inner protective sleeve and an outer protective sleeve, the bottom of the inner protective sleeve is arranged on the fixing plate, and the top of the outer protective sleeve is arranged on the bracket; the outer protective sheath can be relative the up-and-down motion of inlayer protective sheath, through setting up like this, owing to can produce a large amount of dregs and splash when laser cutting, be equipped with the protective sheath and can protect guider with the elevating gear structure especially protects the pneumatic cylinder, the dregs of avoiding splashing enter into the pneumatic cylinder to the influence the normal work of pneumatic cylinder.

Compared with the prior art, the utility model discloses profitable technological effect has been obtained:

1. because the lifting devices on two opposite sides are symmetrically arranged by taking the X axis as a central line, the lifting devices on the same side are symmetrically arranged by taking the Y axis as a central line, and the synchronous motor is arranged at the intersection point of the X axis and the Y axis, the distance from the branch oil circuit of the synchronous motor to each hydraulic cylinder of the lifting device is ensured to be equal, in other words, the lengths of the hydraulic oil circuits of the hydraulic cylinders of the four lifting devices are ensured to be equal, and the synchronous motor can evenly distribute hydraulic oil in a main oil circuit to each branch oil circuit, and under the normal condition, the four lifting devices can be ensured to be synchronously lifted; the movable rod of the hydraulic cylinder is connected with a supporting block, the positioning blocks and the supporting blocks are arranged on the lower surface of the support in a one-to-one correspondence manner, the positioning blocks can be detachably abutted on the upper surface of the supporting blocks in a tangent manner, even if the verticality of the hydraulic cylinder of one lifting device and the horizontal plane is slightly deviated, the positioning blocks and the supporting blocks can still be abutted in a tangent manner at different angles, the verticality does not need strict requirements, and the production cost can be reduced; and even when the hydraulic cylinders of a certain lifting device are asynchronous, the corresponding positioning blocks are separated from the supporting blocks, and the rest lifting devices are used for supporting the support frame, so that the support frame keeps balance and continues to ascend, and the asynchronous blocking condition can not occur.

2. Suspension type self-balancing hydraulic lifting device still includes guider, guider includes fixed plate, fly leaf, two guide rails, connecting plate and gyro wheel, the guide rail with the axis of pneumatic cylinder sets up for central line symmetry, gyro wheel fixed connection is in on the fly leaf, the connecting plate will the movable rod with the fly leaf is connected, just the external diameter of gyro wheel is contradicted tangentially guide rail, the fly leaf deviates from one side of movable rod with supporting shoe fixed connection is equipped with guider not only makes suspension type self-balancing hydraulic lifting device's bearing load high, reduces elevating gear's frictional force at the lift in-process moreover, the dead phenomenon of card can not appear.

3. The suspension type self-balancing hydraulic lifting device further comprises a protective sleeve, wherein the protective sleeve comprises an inner protective sleeve and an outer protective sleeve, the bottom of the inner protective sleeve is arranged on the fixed plate, the top of the outer protective sleeve is arranged on the support, and the outer protective sleeve can move up and down relative to the inner protective sleeve; the slag splashing in the cutting process can be prevented from entering the guide device or the lifting device, so that the hydraulic cylinder is protected, and the normal work of the hydraulic cylinder is ensured.

Drawings

FIG. 1 is a schematic diagram of the background art of the present invention;

FIG. 2 is an isometric schematic view of a final assembly of an embodiment of the present invention;

FIG. 3 is a schematic isometric view of an assembled platform according to an embodiment of the present invention;

FIG. 4 is a schematic side view of the general assembly of an embodiment of the present invention;

fig. 5 is a schematic bottom view of a bracket according to an embodiment of the present invention;

fig. 6 is a partially enlarged schematic view of fig. 5 according to an embodiment of the present invention;

fig. 7 is an isometric view of a guide assembly according to an embodiment of the present invention;

fig. 8 is another schematic axial view of a guide device according to an embodiment of the present invention;

fig. 9 is a partially enlarged schematic view of fig. 7 according to an embodiment of the present invention.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

1. a support; 2. a platform; 3. a protective sleeve; 3.1, an outer protective sleeve; 3.2, an inner protective sleeve; 4. a synchronous motor; 5. a hydraulic station; 6. a Y axis; 7. an X axis; 11. positioning blocks; 11.1, spherical surface; 12. a fixing plate; 13. a support block; 13.1, a conical surface groove; 14. a movable plate; 14.1, side panels; 14.2, a front panel; 15. a hydraulic cylinder; 15.1, a movable rod; 15.2, fixing the rod; 15.3, an oil inlet; 15.4, an oil outlet; 16. a connecting plate; 21. a guide rail; 21.1, grooves; 22. a guide roller; 23. supporting the rollers; 101. a guide post; 102. a guide sleeve;

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.

Referring to fig. 2-8, the embodiment discloses a suspension type self-balancing hydraulic lifting device, which comprises a rectangular support 1, a synchronous motor 4, four lifting devices and a hydraulic station 5; the center of the bracket 1 extends along the length direction and the width direction to form an X axis 7 and a Y axis 6 respectively, the four lifting devices are positioned at two opposite sides of the bracket 1, two lifting devices are arranged at each of the two opposite sides of the bracket 1, the lifting devices at the two opposite sides are symmetrically arranged by taking the X axis 7 as a central line, and the two lifting devices at the same side are symmetrically arranged by taking the Y axis 6 as the central line;

the four lifting devices comprise hydraulic cylinders 15, supporting blocks 13 and positioning blocks 11, the hydraulic cylinders 15 comprise movable rods 15.1, the movable rods 15.1 are connected with the supporting blocks 13, the positioning blocks 11 and the supporting blocks 13 are arranged on the lower surface of the support 1 in a one-to-one correspondence manner, and the positioning blocks 11 are detachably abutted on the surfaces of the supporting blocks 13 in a tangent manner;

the synchronous motor 4 is arranged at the intersection of the X-axis 7 and the Y-axis 6, the synchronous motor 4 is connected with one end of a main oil path and one end of a branch oil path, the other end of the main oil path is connected with the hydraulic station 5, and the other end of the branch oil path is connected with the hydraulic cylinder 15; specifically, the main oil path comprises a main oil inlet path and a main oil return path, two ends of the main oil inlet path are respectively connected with a main oil inlet of the synchronous motor 4 and an oil outlet of the hydraulic station 5, and two ends of the main oil return path are respectively connected with a main oil outlet of the synchronous motor 4 and an oil return port of the hydraulic station 5; the branch oil path comprises a branch oil outlet path and a branch oil return path, two ends of the branch oil outlet path are respectively connected with a branch oil outlet of the synchronous motor 4 and an oil inlet 15.3 of the hydraulic cylinder 15, and two ends of the branch oil return path are respectively connected with a branch oil inlet of the synchronous motor 4 and an oil outlet 15.4 of the hydraulic cylinder 15.

The distances from the branch oil paths of the synchronous motor 4 to the hydraulic cylinders 15 of each lifting device are ensured to be equal, the distances from each branch oil outlet path are ensured to be equal, the distances from each branch oil return path are ensured to be equal, and the synchronous motor 4 can ensure that the flow rates from the main oil inlet path to the branch oil outlet paths are equal and the flow rates from the branch oil return paths to the main oil return paths are also ensured to be equal; in other words, the four lifting devices can be ensured to act synchronously under normal conditions; the movable rod 15.1 is connected with the supporting block 13, the positioning blocks 11 and the supporting blocks 13 are arranged on the lower surface of the support 1 in a one-to-one correspondence manner, and the positioning blocks 11 can be in separable tangent contact with the upper surface of the supporting blocks 13, so that the support 1 is hung on the lifting device, and even when the verticality of the hydraulic cylinder 15 of a certain suspended self-balancing hydraulic lifting device and the horizontal plane is slightly deviated, the supporting blocks 13 can still be in tangent contact with the lower surface of the positioning blocks 11 at different angles, the verticality requirement is lowered, and the production cost; even when the hydraulic oil circuit of a certain lifting device fails asynchronously, the corresponding positioning block 11 is separated from the supporting block 13, and the rest lifting device supporting bracket 1 is relied to keep balance and continuously lift, so that the asynchronous blocking phenomenon cannot occur.

More specifically, the upper surface of the supporting block 13 is provided with a conical surface groove 13.1, the lower surface of the positioning block 11 is provided with a spherical surface 11.1, and the spherical surface 11.1 can be detachably and tangentially abutted against the conical surface groove 13.1; the spherical surface 11.1 is tangentially abutted with the conical surface groove 13.1, so that the bearing load of the supporting block 13 is high.

The suspended self-balancing hydraulic lifting device further comprises a guide device, the guide device comprises two guide rails 21 and rollers, the lifting device further comprises a connecting plate 16, a fixed plate 12 and a movable plate 14, the hydraulic cylinder 15 further comprises a fixed rod 15.2, the fixed rod 15.2 is arranged on the fixed plate 12, the two guide rails 21 are symmetrically arranged on the fixed plate 12 by taking the axis of the hydraulic cylinder 15 as a central line, and the connecting line of the two guide rails 21 is parallel to the X axis 7; the movable plate 14 is provided with a roller, the connecting plate 16 fixedly connects the movable rod 15.1 with the movable plate 14, and the outer diameter of the roller is tangential to the abutting guide rail 21; the side of the movable plate 14 facing away from the movable rod 15.1 is fixedly connected to the supporting block 13, so as to guide the lifting process of the lifting device and reduce the stress of the lifting device.

The roller comprises a supporting roller 23 and a guiding roller 22, the guiding track 21 comprises a front surface facing the hydraulic cylinder 15 and a back surface arranged opposite to the front surface, a groove 21.1 extending along the vertical direction is formed in the back surface of the guiding track 21, the groove 21.1 comprises a bottom surface and two side surfaces, the supporting roller 23 is arranged in the groove 21.1, and the supporting roller 23 is only in tangential contact with one side surface of the groove 21.1; guide roller 22 sets up in guide rail 21's front, and guide roller 22 is tangent contradicts with guide rail 21's front, and supporting roller 23 can bear very big load to supporting roller 23 and guide roller 22 reduce frictional force at elevating gear's lift in-process, guarantee that whole elevating gear's the in-process of lift can not block and die.

The groove 21.1 comprises an upper groove and a lower groove, the vertical distance between two side surfaces of the upper groove is 1.05-1.10 times of the outer diameter of the supporting roller 23, in the embodiment, the vertical distance between two side surfaces of the upper groove is 1.05 times of the outer diameter of the supporting roller 23, so that the supporting roller 23 can only tangentially abut against one side surface of the upper groove, and when the bracket 1 bears a large load, namely the guiding device bears a large load, the guiding device can deform, the vertical distance between two side surfaces of the upper groove is larger than the outer diameter of the supporting roller 23, and a space for deformation is reserved; the vertical distance of two sides of low groove is 0.9 times of supporting roller 23 external diameter, plays limiting displacement like this when whole suspension type self-balancing hydraulic lifting device descends to the minimum, when having also avoided pneumatic cylinder 15 to break down, plays limiting displacement when suspension type self-balancing hydraulic lifting device receives the dead weight to descend.

At least two support rollers 23 and two guide rollers 22 are arranged on each guide rail 21, if only one support roller 23 and one guide roller 22 are arranged, when the support bears load, the load generates pressure on the bracket 1, the pressure is transmitted to the guide device, bending moment is generated at the centers of the support rollers 23 and the guide rollers 22, and the bending moment cannot be counteracted; on the contrary, in the embodiment, two support rollers 23 and two guide rollers 22 are disposed on each guide rail 21, and when the force is transmitted to the guide device, the two support rollers 23 and the two guide rollers 22 abut against the guide rail 21 to form a reverse bending moment, so as to reduce or counteract the bending moment generated by the load.

Two side surfaces of the top end of the upper groove are provided with chamfer structures, the movable plate 14 comprises a front panel 14.2 and two side panels 14.1 connected to two sides of the front panel 14.2, one side of each side panel 14.1 facing the hydraulic cylinder 15 is provided with two vertically aligned supporting rollers 23, fixing shafts of the supporting rollers 23 are fixedly connected with the side panel 14.1, so that the supporting rollers 23 are rotatably and fixedly connected to the side panel 14.1, one side of the front panel 14.2 facing the hydraulic cylinder 15 is provided with two columns of two vertically aligned guide rollers 22, the two columns of vertically aligned guide rollers 22 are respectively close to the two side panels 14.1, and fixing shafts of the guide rollers 22 are fixedly connected with the front panel 14.2, so that the guide rollers 22 are rotatably and fixedly connected to the front panel 14.2; when the supporting roller 23 and the guide roller 22 are sleeved in the guide track 21, the outer diameter of the guide roller 22 is tangentially abutted against the front surface of the guide track 21, the outer diameter of the supporting roller 23 is tangentially abutted against one side surface of the upper groove, and a gap exists between the end surface of the supporting roller 23 and the bottom surface of the upper groove; two side surfaces of the top end of the upper groove are provided with chamfer structures, so that the supporting roller 23 can be conveniently sunk into the upper groove of the guide rail 21 from the top end of the upper groove.

The dead lever 15.2 of pneumatic cylinder 15 is equipped with the fine setting nut, and the fine setting nut is contradicted in the below of connecting plate 16, when suspension type self-balancing hydraulic lifting device sets up on unevenness's ground, can adjust the fine setting nut for elevating gear is in on the same horizontal plane, in other words, guarantees that support 1 keeps the level promptly.

Suspension type self-balancing hydraulic pressure elevating gear still includes protective sheath 3, protective sheath 3 includes inlayer protective sheath 3.2 and outer protective sheath 3.1, the bottom setting of inlayer protective sheath 3.2 is on fixed plate 12, the top setting of outer protective sheath 3.1 is on support 1, and outer protective sheath 3.1 can inlayer protective sheath 3.2 up-and-down motion relatively, owing to can produce a large amount of dregs and splash in laser cutting, be equipped with protective sheath 3 and can protect elevating gear and guider's structure, especially protect hydraulic cylinder 15, the dregs of avoiding splashing enter into in the pneumatic cylinder 15, thereby influence the normal work of pneumatic cylinder 15.

The utility model discloses use of embodiment:

the suspension type self-balancing hydraulic lifting device is arranged on a working position, if the ground of the working position is not a horizontal plane, a fine adjustment nut of a fixing rod 15.2 of a hydraulic cylinder 15 needs to be adjusted, so that the four supporting blocks 13 are positioned on the same horizontal plane, namely, the support 1 is horizontally suspended on the lifting device; after the leveling is finished, the platform 2 is fixed on the support 1, a hydraulic system of the suspension type self-balancing hydraulic lifting device is started, at the moment, hydraulic oil flows into a main oil inlet of the synchronous motor 4 from an oil outlet of the hydraulic station 5 through a main oil inlet path, enters the synchronous motor 4 and then enters four branch oil outlets in an average flow dividing mode, and flows into oil inlets 15.3 of the hydraulic cylinders 15 from branch oil outlets through branch oil outlet paths, hydraulic energy is converted into mechanical energy, movable rods 15.1 of the hydraulic cylinders 15 ascend, the movable rods 15.1 ascend to drive the movable plates 14 to ascend, the movable plates 14 ascend to drive the supporting blocks 13 to ascend, the supporting blocks 13 ascend to drive the platform 2, and when the platform 2 stably ascends to a specified height, the next cutting operation is carried out; if the verticality of the hydraulic cylinder 15 of one lifting device and the horizontal plane has slight deviation, the hydraulic cylinder can still normally ascend under the support and guide of the support roller 23 and the guide roller 22, the support block 13 and the positioning block 11 can still tangentially abut at different angles, and the clamping state cannot occur; if the hydraulic oil circuit of a certain lifting device has a fault of flow reduction or flow speed reduction, the lifting speed of the lifting device is slowed down relatively to other parts, so that the supporting block 13 connected to the lifting device is separated from the corresponding positioning block 11, the rest of the lifting device supporting platforms 2 keep balance and continue to ascend to the designated position, and the lifting device with the fault finally reaches the designated height along with the lapse of time, so that the supporting block 13 connected to the lifting device is tangent to the corresponding positioning block 11 again, and when the system detects that the hydraulic cylinders 15 of the four lifting devices all ascend to the designated position, the next cutting operation can be carried out.

After the cutting operation is completed, the flow direction in the hydraulic oil circuit is opposite, and the movable rod 15.1 of the hydraulic cylinder 15 is stably descended to the lowest point, so that the platform 2 is also stably descended to the lowest point.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.

Claims

1. A suspension type self-balancing hydraulic lifting device is characterized by comprising a rectangular bracket, a synchronous motor, four lifting devices and a hydraulic station; the center of the support extends along the length direction and extends along the width direction to form an X axis and a Y axis respectively, the four lifting devices are positioned at two opposite sides of the support, two lifting devices are arranged at each of the two opposite sides of the support, the lifting devices at the two opposite sides are symmetrically arranged by taking the X axis as a central line, and the two lifting devices at the same side are symmetrically arranged by taking the Y axis as a central line;

the four lifting devices respectively comprise a hydraulic cylinder, supporting blocks and positioning blocks, the hydraulic cylinder comprises a movable rod, the movable rod is connected with the supporting blocks, the positioning blocks and the supporting blocks are arranged on the lower surface of the bracket in a one-to-one correspondence manner, and the positioning blocks are detachably abutted against the surfaces of the supporting blocks in a tangent manner;

the synchronous motor is arranged at the intersection of the X axis and the Y axis and is connected with one end of a main oil path and one end of a branch oil path, the other end of the main oil path is connected with the hydraulic station, and the other end of the branch oil path is connected with the hydraulic cylinder.

2. The suspended self-balancing hydraulic lifting device as claimed in claim 1, wherein the supporting block has a conical groove on its upper surface, and the positioning block has a spherical surface on its lower surface, the spherical surface tangentially abutting against the conical groove.

3. The suspended self-balancing hydraulic lifting device as claimed in claim 1 or 2, further comprising a guiding device, wherein the guiding device comprises two guiding rails and rollers, the lifting device further comprises a connecting plate, a fixed plate and a movable plate, the hydraulic cylinder further comprises a fixed rod, the fixed rod is disposed on the fixed plate, the two guiding rails are symmetrically disposed on the fixed plate with the axis of the hydraulic cylinder as a center line, and the connecting line of the two guiding rails is parallel to the X-axis; the movable plate is provided with a roller, the connecting plate fixedly connects the movable rod with the movable plate, and the outer diameter of the roller is tangentially abutted against the guide rail; one side of the movable plate, which deviates from the movable rod, is fixedly connected with the supporting block.

4. The suspended self-balancing hydraulic lifting device of claim 3, wherein the rollers include support rollers and guide rollers, the guide rail includes a front surface facing the hydraulic cylinder and a back surface disposed opposite to the front surface, the back surface of the guide rail is provided with a groove extending in a vertical direction, the groove includes a bottom surface and two side surfaces, the support rollers are disposed in the groove, and the support rollers only tangentially abut against one side surface of the groove; the guide roller is arranged on the front face of the guide rail, and the guide roller is in tangent conflict with the front face.

5. The suspended self-balancing hydraulic lifting device as claimed in claim 4, wherein the grooves include an upper groove and a lower groove, the vertical distance between two sides of the upper groove is 1.05-1.10 times the outer diameter of the support roller, and the vertical distance between two sides of the lower groove is 0.9 times the outer diameter of the support roller.

6. The suspended self-balancing hydraulic lifting device of claim 5, wherein at least two support rollers and at least two guide rollers are disposed on each guide rail.

7. The suspended self-balancing hydraulic lifting device as claimed in claim 5, wherein the top of the upper groove is provided with a chamfer structure on both sides.

8. The suspended self-balancing hydraulic lifting device of claim 3, wherein the fixing rod is provided with a fine adjustment nut, and the fine adjustment nut abuts against the lower portion of the connecting plate.

9. The suspended self-balancing hydraulic lifting device according to any one of claims 4 to 8, further comprising a protective jacket, wherein the protective jacket comprises an inner protective jacket and an outer protective jacket, the bottom of the inner protective jacket is disposed on the fixed plate, and the top of the outer protective jacket is disposed on the support; the outer protective sleeve can move up and down relative to the inner protective sleeve.