CN220687732U - Parallel synchronous hydraulic cylinder - Google Patents
Parallel synchronous hydraulic cylinder Download PDFInfo
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- CN220687732U CN220687732U CN202322464531.3U CN202322464531U CN220687732U CN 220687732 U CN220687732 U CN 220687732U CN 202322464531 U CN202322464531 U CN 202322464531U CN 220687732 U CN220687732 U CN 220687732U
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- 230000001360 synchronised effect Effects 0.000 title claims abstract description 44
- 239000012530 fluid Substances 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 239000003921 oil Substances 0.000 description 27
- 230000000712 assembly Effects 0.000 description 5
- 238000000429 assembly Methods 0.000 description 5
- 239000010720 hydraulic oil Substances 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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Abstract
The utility model provides a synchronous pneumatic cylinder of parallel, includes big piston cylinder, big piston and a plurality of little piston cylinder subassembly, big piston along axial sliding connection in the inner wall of big piston cylinder, first hydraulic fluid port has been seted up to the one end of big piston cylinder, little piston cylinder subassembly includes little piston cylinder, little piston rod and little piston, a plurality of the one end of little piston cylinder with the other end of big piston cylinder is linked together, and a plurality of the second hydraulic fluid port has all been seted up to the other end of little piston cylinder, little piston along axial sliding connection in the inner wall of little piston cylinder, the one end of little piston rod connect in little piston, the other end connect in big piston. The design is simple in structure, low in cost, high in synchronization precision and convenient to install and detach.
Description
Technical Field
The utility model relates to the technical field of hydraulic cylinder equipment, in particular to a parallel synchronous hydraulic cylinder.
Background
The hydraulic cylinder has simple structure and reliable operation, so the hydraulic cylinder is widely applied to hydraulic systems of various machines, in particular to the application of the synchronous hydraulic cylinder, and the synchronous operation of a plurality of working procedures can be realized, so that the transmission of force is more convenient, and in order to realize the synchronous action of the hydraulic cylinder, the following method is generally adopted:
1. synchronous hydraulic valves are adopted, but the same-way precision of the existing products is lower; 2. the synchronous hydraulic motor is adopted, but the cost manufacturing precision requirement is high, the synchronous hydraulic motor works at a higher rotating speed, the synchronous precision can be quickly reduced when the abrasion is increased, and the precision can be greatly reduced when the load unbalanced load is larger; 3. the tandem synchronous hydraulic cylinders are adopted, but when the tandem synchronous hydraulic pressure is higher than the synchronization of the two cylinders, the design length of the synchronous cylinders is long, and when the tandem synchronous cylinders are too long, the installation of some equipment is difficult; and 4, the synchronous control system of the proportional valve servo valve has the synchronous precision of 0.02-0.5%, is also suitable for synchronous control of multiple hydraulic cylinders, but the high-precision synchronous proportional servo control has extremely high requirements on an electric control system and programming programs, and meanwhile, the sensor, the controller, the proportional servo valve and the like have extremely high cost and also have extremely high requirements on the technical level of later maintenance personnel, so that the input of the proportional valve servo valve is high in maintenance cost, and the proportional valve servo valve is unsuitable for synchronous lifting equipment with higher synchronous requirements, but has simple and reliable requirements and lower cost.
Disclosure of Invention
The utility model aims to overcome the defects and problems of lower synchronization precision and higher cost of a hydraulic cylinder in the prior art and provides a parallel type synchronous hydraulic cylinder with higher synchronization precision and lower cost.
In order to achieve the above object, the technical solution of the present utility model is:
the utility model provides a synchronous pneumatic cylinder of parallel, includes big piston cylinder, big piston and a plurality of little piston cylinder subassembly, big piston along axial sliding connection in the inner wall of big piston cylinder, first hydraulic fluid port has been seted up to the one end of big piston cylinder, little piston cylinder subassembly includes little piston cylinder, little piston rod and little piston, a plurality of the one end of little piston cylinder with the other end of big piston cylinder is linked together, and a plurality of the second hydraulic fluid port has all been seted up to the other end of little piston cylinder, little piston along axial sliding connection in the inner wall of little piston cylinder, the one end of little piston rod connect in little piston, the other end connect in big piston.
The large piston cylinder is horizontally arranged, the large piston cylinder comprises a large cylinder barrel, a first cylinder cover and a second cylinder cover, two ends of the large cylinder barrel are opened, the first cylinder cover is connected to the inner wall of one end of the large cylinder barrel, a first oil port is formed in the center of the first cylinder cover, the second cylinder cover is connected to the other end of the large cylinder barrel, a plurality of mounting holes are formed in the end face of the second cylinder cover, and a plurality of small piston cylinders are connected with the plurality of mounting holes in a one-to-one correspondence mode.
The outer peripheral surface threaded connection that big cylinder is close to the one end of second cylinder cap has the mounting, the one end butt of mounting in the one end of second cylinder cap, the other end of mounting is provided with a plurality of bolts along the circumferencial direction, a plurality of equal threaded connection of bolt in mounting, second cylinder cap.
The lower side of big piston cylinder is provided with the base, the cross-section of base is the U type, a lateral wall of base connect in the second cylinder cap, another lateral wall of base connect in first cylinder cap, big cylinder is located the top of the interior diapire of base.
The second cylinder cover is far away from the center department of an end face of big cylinder is connected with the backup pad, the backup pad is circular, first arc wall has been seted up to the lateral wall that the base is close to the second cylinder cover, the inner wall of first arc wall with the appearance assorted of backup pad, the backup pad butt in the inner wall of first arc wall.
The base is close to the lateral wall of the first cylinder cover and is provided with a second arc-shaped groove, the second arc-shaped groove and the first cylinder cover are concentrically arranged, and the base is connected to one end of the first cylinder cover through a bolt.
Two third oil ports are formed in the outer peripheral surface of the second cylinder cover along the radial direction, and the two third oil ports are respectively communicated with the large cylinder barrel.
The small piston cylinders are circumferentially distributed at one end of the second cylinder cover.
The one end that big piston is close to little piston rod has seted up first screw hole, the one end that little piston is close to little piston rod has seted up the second screw hole, the both ends of little piston rod pass through connector threaded connection respectively in first screw hole, second screw hole.
The cross-sectional area of the large piston is larger than the sum of the cross-sectional areas of the plurality of small pistons.
Compared with the prior art, the utility model has the beneficial effects that:
1. according to the parallel synchronous hydraulic cylinder, the plurality of small piston cylinder assemblies are connected with the large piston rod in a parallel manner, the small piston rod and the large piston are connected together, when oil is fed into or discharged from the first oil port of the large piston cylinder, the small piston rod and the large piston are driven to synchronously move, the small pistons move in the same stroke, so that the oil quantity pushed out or fed in by the small pistons is the same, synchronization is realized, meanwhile, the synchronization precision under the unbalanced load of the parallel synchronous hydraulic pressure is only influenced by the compressibility of hydraulic oil, the compressibility of the hydraulic oil is extremely small, so that the parallel synchronous hydraulic pressure has good unbalanced load resistance, good synchronization precision can be protected under the unbalanced load working condition, the synchronization precision can be controlled to be 0.02-0.05%, and the synchronization precision can be controlled to be within 0.7-1% under the unbalanced load working condition (when the pressure difference between the small piston cylinders is 10 MPA). Therefore, the utility model has simple structure, lower cost and higher synchronization precision.
2. According to the parallel synchronous hydraulic cylinder, the large piston cylinder adopts the connecting structure of the large cylinder barrel, the first cylinder cover, the second cylinder cover and the fixing piece, the fixing piece is connected to the large cylinder barrel in a threaded manner, and meanwhile, the fixing piece and the second cylinder cover are connected and fixed through the bolts, so that the large piston cylinder is more convenient to install and detach; the base adopts U type structure, makes the base can provide the support to big piston cylinder, has offered first arc wall simultaneously on the base, and big piston cylinder leans on first arc wall through the backup pad, can conveniently adjust big piston cylinder's angle, is convenient for assemble big piston cylinder with little piston cylinder subassembly on, through setting up the second arc wall, can make things convenient for big piston cylinder and other hydraulic components to assemble. Therefore, the utility model has simple structure and convenient installation and disassembly.
3. In the parallel synchronous hydraulic cylinder, the third oil port is formed in the second cylinder cover, so that the large piston can be driven by the small piston and can also be driven by the third oil port, and various control schemes can be extended in a control loop of the hydraulic system so as to cope with various lifting working conditions of the oil cylinder; the small piston cylinder is connected to the large piston cylinder in a circumferential distribution mode, the circumferential distribution structure is simple, the processing is convenient, and compared with a serial hydraulic cylinder, the small piston cylinder has the advantages that the length is not required to be increased, the diameter is not required to be increased, so that the structure is compact, and the use is convenient; the small piston, the small piston rod and the large piston are connected in a threaded connection mode, so that the assembly and the disassembly are convenient; the area of the large piston is larger than the sum of the areas of the small pistons, so that the pressure of the oil supply hydraulic system can be reduced. So that a smaller pressure hydraulic oil source can drive a larger load. Therefore, the utility model has simple structure, high reliability and convenient installation and disassembly.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is a schematic side view of the present utility model.
FIG. 3 is a schematic cross-sectional view taken in the direction A-A of FIG. 2.
Fig. 4 is a schematic cross-sectional view in the direction B-B of fig. 2.
FIG. 5 is a schematic cross-sectional view of a large piston cylinder, large piston, small piston rod assembly of the present utility model.
In the figure: the large piston cylinder 1, the large cylinder 11, the first cylinder cover 12, the second cylinder cover 13, the fixing piece 14, the supporting plate 15, the first oil port 16, the third oil port 17, the mounting hole 18, the large piston 2, the first threaded hole 21, the small piston assembly 3, the small piston cylinder 31, the small piston 32, the small piston rod 33, the connector 34, the second threaded hole 35, the second oil port 36, the base 4, the first arc-shaped groove 41, the second arc-shaped groove 42, the bolt 5, the sealing piece 6 and the supporting ring 7.
Detailed Description
The utility model is described in further detail below with reference to the accompanying drawings and detailed description.
Referring to fig. 1 to 5, a parallel synchronous hydraulic cylinder comprises a large piston cylinder 1, a large piston 2 and a plurality of small piston cylinder assemblies 3, wherein the large piston 2 is connected to the inner wall of the large piston cylinder 1 in an axial sliding manner, one end of the large piston cylinder 1 is provided with a first oil port 16, the small piston cylinder assemblies 3 comprise small piston cylinders 31, small piston rods 33 and small pistons 32, one ends of the small piston cylinders 31 are communicated with the other ends of the large piston cylinders 1, the other ends of the small piston cylinders 31 are provided with second oil ports 36, the small pistons 32 are connected to the inner wall of the small piston cylinders 31 in an axial sliding manner, and one ends of the small piston rods 33 are connected to the small pistons 32, and the other ends of the small piston rods 33 are connected to the large piston 2.
The large piston cylinder 1 is horizontally arranged, the large piston cylinder 1 comprises a large cylinder barrel 11, a first cylinder cover 12 and a second cylinder cover 13, two ends of the large cylinder barrel 11 are opened, the first cylinder cover 12 is connected to the inner wall of one end of the large cylinder barrel 11, a first oil port 16 is formed in the center of the first cylinder cover 12, the second cylinder cover 13 is connected to the other end of the large cylinder barrel 11, a plurality of mounting holes 18 are formed in the end face of the second cylinder cover 13, and a plurality of small piston cylinders 31 are connected with the plurality of mounting holes 18 in a one-to-one correspondence mode.
The outer peripheral surface of the end, close to the second cylinder cover 13, of the large cylinder barrel 11 is in threaded connection with a fixing piece 14, one end of the fixing piece 14 is abutted to one end of the second cylinder cover 13, a plurality of bolts 5 are arranged at the other end of the fixing piece 14 along the circumferential direction, and a plurality of bolts 5 are in threaded connection with the fixing piece 14 and the second cylinder cover 13.
The lower side of big piston cylinder 1 is provided with base 4, the cross-section of base 4 is the U type, a lateral wall of base 4 connect in second cylinder cap 13, another lateral wall of base 4 connect in first cylinder cap 12, big cylinder 11 is located the top of the interior diapire of base 4.
The center department that the second cylinder cap 13 kept away from the one end face of big cylinder 11 is connected with backup pad 15, backup pad 15 is circular, first arc wall 41 has been seted up to the lateral wall that base 4 is close to second cylinder cap 13, the inner wall of first arc wall 41 with the appearance phase-match of backup pad 15, backup pad 15 butt in the inner wall of first arc wall 41.
The base 4 is close to the side wall of the first cylinder cover 12 and provided with a second arc-shaped groove 42, the second arc-shaped groove 42 is concentrically arranged with the first cylinder cover 12, and the base 4 is connected to one end of the first cylinder cover 12 through a bolt 5.
Two third oil ports 17 are formed in the radial direction on the outer peripheral surface of the second cylinder cover 13, and the two third oil ports 17 are respectively communicated with the large cylinder 11.
A plurality of small piston cylinders 31 are circumferentially distributed at one end of the second cylinder cover 13.
The one end that is close to little piston rod 33 of big piston 2 has seted up first screw hole 21, the one end that is close to little piston rod 33 of little piston 32 has seted up second screw hole 35, the both ends of little piston rod 33 respectively through connector 34 threaded connection in first screw hole 21, second screw hole 35.
The cross-sectional area of the large piston 2 is larger than the sum of the cross-sectional areas of the plurality of small pistons 32.
The principle of the utility model is explained as follows:
in the utility model, the small piston cylinder assembly 3 can be respectively 2, 3 or 4 sets, and respectively forms a two-way synchronous hydraulic cylinder, a three-way synchronous hydraulic cylinder or a four-way synchronous hydraulic cylinder with the large piston cylinder 1 and the large piston 2, the small piston 32 and the large piston 1 are respectively provided with the sealing element 6 and the supporting ring 7, and simultaneously, the joint of the large cylinder barrel 11 and the second cylinder cover 13 is also provided with the sealing element 6. When the parallel synchronous hydraulic cylinder works, the large piston 1 is driven to linearly reciprocate by oil inlet of the first oil port 16 and the third oil port 17, meanwhile, the small pistons 32 synchronously move along the straight line, the moving stroke of the large piston 1 is consistent with the moving stroke of each small piston 32, and the oil quantity pushed out by each small piston 32 in the same stroke is the same, so that synchronization is realized.
Example 1:
referring to fig. 1 to 5, a parallel synchronous hydraulic cylinder comprises a large piston cylinder 1, a large piston 2 and a plurality of small piston cylinder assemblies 3, wherein the large piston 2 is connected to the inner wall of the large piston cylinder 1 in an axial sliding manner, one end of the large piston cylinder 1 is provided with a first oil port 16, the small piston cylinder assemblies 3 comprise small piston cylinders 31, small piston rods 33 and small pistons 32, one ends of the small piston cylinders 31 are communicated with the other ends of the large piston cylinders 1, the other ends of the small piston cylinders 31 are provided with second oil ports 36, the small pistons 32 are connected to the inner wall of the small piston cylinders 31 in an axial sliding manner, and one ends of the small piston rods 33 are connected to the small pistons 32, and the other ends of the small piston rods 33 are connected to the large piston 2.
The large piston cylinder 1 is horizontally arranged, the large piston cylinder 1 comprises a large cylinder barrel 11, a first cylinder cover 12 and a second cylinder cover 13, two ends of the large cylinder barrel 11 are opened, the first cylinder cover 12 is connected to the inner wall of one end of the large cylinder barrel 11, a first oil port 16 is formed in the center of the first cylinder cover 12, the second cylinder cover 13 is connected to the other end of the large cylinder barrel 11, a plurality of mounting holes 18 are formed in the end face of the second cylinder cover 13, and a plurality of small piston cylinders 31 are connected with the plurality of mounting holes 18 in a one-to-one correspondence mode. A plurality of small piston cylinders 31 are circumferentially distributed at one end of the second cylinder cover 13.
Two third oil ports 17 are formed in the radial direction on the outer peripheral surface of the second cylinder cover 13, and the two third oil ports 17 are respectively communicated with the large cylinder 11.
The one end that is close to little piston rod 33 of big piston 2 has seted up first screw hole 21, the one end that is close to little piston rod 33 of little piston 32 has seted up second screw hole 35, the both ends of little piston rod 33 respectively through connector 34 threaded connection in first screw hole 21, second screw hole 35.
The cross-sectional area of the large piston 2 is larger than the sum of the cross-sectional areas of the plurality of small pistons 32.
Example 2:
the basic content is the same as in example 1, except that:
referring to fig. 3 to 5, a fixing member 14 is screwed to the outer peripheral surface of the end of the large cylinder 11 close to the second cylinder cover 13, one end of the fixing member 14 abuts against one end of the second cylinder cover 13, a plurality of bolts 5 are provided at the other end of the fixing member 14 along the circumferential direction, and a plurality of bolts 5 are screwed to the fixing member 14 and the second cylinder cover 13.
Example 3:
the basic content is the same as in example 1, except that:
referring to fig. 1 to 5, a base 4 is disposed on the lower side of the large piston cylinder 1, the cross section of the base 4 is U-shaped, one side wall of the base 4 is connected to the second cylinder cover 13, the other side wall of the base 4 is connected to the first cylinder cover 12, and the large cylinder 11 is located above the inner bottom wall of the base 4.
Example 4:
the basic content is the same as in example 1, except that:
referring to fig. 2 to 4, a support plate 15 is connected to a center of an end surface of the second cylinder cover 13 away from the large cylinder 11, the support plate 15 is circular, a first arc-shaped groove 41 is formed in a side wall of the base 4, which is close to the second cylinder cover 13, an inner wall of the first arc-shaped groove 41 is matched with an outer shape of the support plate 15, and the support plate 15 abuts against an inner wall of the first arc-shaped groove 41. The base 4 is close to the side wall of the first cylinder cover 12 and provided with a second arc-shaped groove 42, the second arc-shaped groove 42 is concentrically arranged with the first cylinder cover 12, and the base 4 is connected to one end of the first cylinder cover 12 through a bolt 5.
Claims (10)
1. The utility model provides a synchronous pneumatic cylinder of parallel, its characterized in that: including big piston cylinder (1), big piston (2) and a plurality of little piston cylinder subassembly (3), big piston (2) follow axial sliding connection in the inner wall of big piston cylinder (1), first hydraulic fluid port (16) have been seted up to the one end of big piston cylinder (1), little piston cylinder subassembly (3) include little piston cylinder (31), little piston rod (33) and little piston (32), a plurality of the one end of little piston cylinder (31) with the other end of big piston cylinder (1) is linked together, and a plurality of second hydraulic fluid port (36) have all been seted up to the other end of little piston cylinder (31), little piston (32) follow axial sliding connection in the inner wall of little piston cylinder (31), the one end of little piston rod (33) connect in little piston (32), the other end connect in big piston (2).
2. A parallel synchronous hydraulic cylinder as set forth in claim 1, wherein: big piston cylinder (1) level is arranged, big piston cylinder (1) is including big cylinder (11), first cylinder cap (12) and second cylinder cap (13), the both ends opening of big cylinder (11), first cylinder cap (12) connect in the inner wall of the one end of big cylinder (11), first hydraulic fluid port (16) have been seted up in the center department of first cylinder cap (12), second cylinder cap (13) connect in the other end of big cylinder (11), a plurality of mounting holes (18) have been seted up to the terminal surface of second cylinder cap (13), and a plurality of little piston cylinders (31) are connected with a plurality of mounting holes (18) one-to-one.
3. A parallel synchronous hydraulic cylinder as claimed in claim 2, wherein: the large cylinder barrel (11) is close to the outer peripheral surface threaded connection of one end of second cylinder cover (13) and has mounting (14), the one end butt of mounting (14) in one end of second cylinder cover (13), the other end of mounting (14) is provided with a plurality of bolts (5) along the circumferencial direction, a plurality of bolt (5) all threaded connection in mounting (14), second cylinder cover (13).
4. A parallel synchronous hydraulic cylinder as claimed in claim 2, wherein: the lower side of big piston cylinder (1) is provided with base (4), the cross-section of base (4) is the U type, a lateral wall of base (4) connect in second cylinder cap (13), another lateral wall of base (4) connect in first cylinder cap (12), big cylinder (11) are located the top of the interior diapire of base (4).
5. A parallel synchronous hydraulic cylinder as set forth in claim 4, wherein: the center department that a terminal surface of big cylinder (11) was kept away from to second cylinder lid (13) is connected with backup pad (15), backup pad (15) are circular, first arc wall (41) have been seted up to the lateral wall that base (4) are close to second cylinder lid (13), the inner wall of first arc wall (41) with the appearance phase-match of backup pad (15), backup pad (15) butt in the inner wall of first arc wall (41).
6. A parallel synchronous hydraulic cylinder as set forth in claim 4, wherein: the base (4) is close to the side wall of the first cylinder cover (12) and provided with a second arc-shaped groove (42), the second arc-shaped groove (42) and the first cylinder cover (12) are concentrically arranged, and the base (4) is connected to one end of the first cylinder cover (12) through a bolt (5).
7. A parallel synchronous hydraulic cylinder as claimed in claim 2, wherein: two third oil ports (17) are formed in the outer peripheral surface of the second cylinder cover (13) in the radial direction, and the two third oil ports (17) are respectively communicated with the large cylinder barrel (11).
8. A parallel synchronous hydraulic cylinder as claimed in claim 2, wherein: a plurality of small piston cylinders (31) are circumferentially distributed at one end of the second cylinder cover (13).
9. A parallel synchronous hydraulic cylinder as set forth in claim 1, wherein: the one end that is close to little piston rod (33) of big piston (2) has seted up first screw hole (21), the one end that is close to little piston rod (33) of little piston (32) has seted up second screw hole (35), the both ends of little piston rod (33) pass through connector (34) threaded connection respectively in first screw hole (21), second screw hole (35).
10. A parallel synchronous hydraulic cylinder as set forth in claim 1, wherein: the cross-sectional area of the large piston (2) is larger than the sum of the cross-sectional areas of the plurality of small pistons (32).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322464531.3U CN220687732U (en) | 2023-09-08 | 2023-09-08 | Parallel synchronous hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322464531.3U CN220687732U (en) | 2023-09-08 | 2023-09-08 | Parallel synchronous hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220687732U true CN220687732U (en) | 2024-03-29 |
Family
ID=90410381
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322464531.3U Active CN220687732U (en) | 2023-09-08 | 2023-09-08 | Parallel synchronous hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220687732U (en) |
-
2023
- 2023-09-08 CN CN202322464531.3U patent/CN220687732U/en active Active
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