CN105179342A - Oil cylinder synchronous hydraulic system, work machine and oil cylinder drive method - Google Patents
Oil cylinder synchronous hydraulic system, work machine and oil cylinder drive method Download PDFInfo
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- CN105179342A CN105179342A CN201510494508.6A CN201510494508A CN105179342A CN 105179342 A CN105179342 A CN 105179342A CN 201510494508 A CN201510494508 A CN 201510494508A CN 105179342 A CN105179342 A CN 105179342A
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Abstract
The invention discloses an oil cylinder synchronous hydraulic system. The system is provided with a first oil cylinder and a second oil cylinder, and the inner diameter of the first oil cylinder is the same as that of the second oil cylinder. The area of rodless cavities of the two oil cylinders is twice that of rod cavities of the two oil cylinders. Under a first predetermined state, the rod cavity of the first oil cylinder and the rod cavity of the second oil cavity are communicated with the rodless cavity of the second oil cylinder, and the rodless cavity of the first oil cylinder is communicated with a pressure oil source. At the time, hydraulic oil supplied by a pressure oil source enters the rodless cavity of the first oil cylinder, and correspondingly, hydraulic oil in the rod cavity of the first oil cylinder and in the rod cavity of the second oil cylinder enters the rodless cavity of the second oil cavity. The volume of the hydraulic oil entering the rodless cavity of the first oil cavity is equal to that of the hydraulic oil entering the rodless cavity of the second oil cavity, and the flow processes of the hydraulic oil are almost synchronous so that it can be guaranteed that a piston rod of the first oil cylinder and a piston rod of the second oil cylinder extend out synchronously. Besides, the invention discloses an oil cylinder drive method and a work machine provided with the oil cylinder synchronous hydraulic system.
Description
Technical field
The present invention relates to hydraulic driving technology, be specifically related to a kind of oil cylinder synchronization hydraulic system, Work machine and hydraulic oil cylinder driving method.
Background technique
The effect of telescopic oil cylinder (abbreviation oil cylinder) is the straight line motion pressure energy of flowing medium transmission being converted into mechanical type, and the advantages such as volume is little, compact structure that it has, have become one of modal hydraulic actuator in hydraulic system.
In some engineering goods, guarantee machine product is high-quality realizes predetermined function for usual needs two oil cylinder synchronization motions (namely the stroke of same time piston movement is consistent), for hoist, if drive same mechanical arm luffing by two oil cylinders, two oil cylinder synchronization motions ensure that mechanical arm completes the basic demand of predetermined action, two cylinder force equilibriums; Again for iron driller, iron driller is as a kind of fastening means, and its Main Function is connected or dismounting by two drilling rods, utilizes it reliably, efficiently to be connected or dismounting by two drilling rods, and greatly reduces the labor intensity of workman.Clamping clip on iron driller generally includes two calipers be oppositely arranged, each caliper by a hydraulic oil cylinder driving, when clamp drilling rod time, two caliper relative movement, so clamping drilling rod; If two cylinder actions are asynchronous, one of them caliper is made first to touch drilling rod; Result is exactly drilling rod both sides discontinuity equalizations, causes drilling rod to bend or offsets, and finally affects the connection effect of two drilling rods.
In existing Work machine product, the various problems caused because oil cylinder is asynchronous occur often, have had a strong impact on operating efficiency and the working life of product.
Summary of the invention
In view of this, first, the invention provides a kind of oil cylinder synchronization hydraulic system, utilize this oil cylinder synchronization hydraulic system can ensure two oil cylinders synchronization motion under predetermined operating mode; Secondly, the present invention also provides a kind of Work machine with above-mentioned oil cylinder synchronization hydraulic system; Moreover the present invention also provides a kind of hydraulic oil cylinder driving method.
As first aspect, the invention provides a kind of oil cylinder synchronization hydraulic system, specifically comprise pressure oil-source, hydraulic oil container, the first oil cylinder and the second oil cylinder; Described first oil cylinder is identical with the second oil cylinder internal diameter, and their rodless cavity area is the twice of rod chamber area; Under the first predetermined state, the rod chamber of described first oil cylinder and the second oil cylinder is all communicated with the rodless cavity of the second oil cylinder, and the rodless cavity of described first oil cylinder is communicated with pressure oil-source; Under the second predetermined state, the rod chamber of described first oil cylinder and the second oil cylinder is all communicated with pressure oil-source, and the rodless cavity of the first oil cylinder and the second oil cylinder is all communicated with hydraulic oil container.
In preferred technological scheme, under the 3rd predetermined state, the rodless cavity of described first oil cylinder and the second oil cylinder is all communicated with pressure oil-source, and the rod chamber of the first oil cylinder and the second oil cylinder is all communicated with hydraulic oil container.
In preferred technological scheme, under the 4th predetermined state, the first oil cylinder, the second oil cylinder all disconnect with pressure oil-source and hydraulic oil container.
In preferred technological scheme, described oil cylinder synchronization hydraulic system comprises the first switching valve and the second switching valve; Described first switching valve and the second switching valve coordinate and are used for described oil cylinder synchronization hydraulic system is switched between the first predetermined state, the second predetermined state, the 3rd predetermined state and the 4th predetermined state.
In preferred technological scheme, described first switching valve is two-position four way change valve, and described second switching valve is three position four-way directional control valve.
The oil cylinder synchronization hydraulic system that the present invention proposes is provided with the first identical oil cylinder of internal diameter and the second oil cylinder, and the rodless cavity area of these two oil cylinders is the twice of rod chamber area, under the first predetermined state, the rod chamber of the first oil cylinder and the second oil cylinder is all communicated with the rodless cavity of the second oil cylinder, and the rodless cavity of the first oil cylinder is communicated with pressure oil-source, now, the hydraulic oil that pressure oil-source provides enters the rodless cavity of the first oil cylinder, accordingly, hydraulic oil in the rod chamber of the first oil cylinder and the rod chamber of the second oil cylinder enters in the rodless cavity of the second oil cylinder, equal on volume owing to entering hydraulic oil in the first oil cylinder rodless cavity with the hydraulic oil entered in the second oil cylinder rodless cavity, and the process that hydraulic oil flows into is be almost synchronous in time, therefore, can ensure that the piston rod of the first oil cylinder and the second oil cylinder synchronously stretches out.
As second aspect, present invention also offers a kind of Work machine, this Work machine comprises the oil cylinder synchronization hydraulic system of above-mentioned any one; This Work machine can be specifically iron driller, hoist or excavator etc.
Owing to being provided with above-mentioned oil cylinder synchronization hydraulic system, it is synchronous that the Work machine that the present invention proposes better can realize two oil cylinders, and then promote operating efficiency, and extend the working life of Work machine self
As the third aspect, present invention also offers a kind of hydraulic oil cylinder driving method, for ordering about the first oil cylinder and the second cylinder action, described first oil cylinder is identical with the second oil cylinder internal diameter, and their rodless cavity area is the twice of rod chamber area; Described hydraulic oil cylinder driving method comprises the following steps:
S1: the rod chamber of the rod chamber of the first oil cylinder, the second oil cylinder is all communicated with the rodless cavity of the second oil cylinder;
S2: be communicated with pressure oil-source by the rodless cavity of the first oil cylinder, the piston rod ordering about the first oil cylinder and the second oil cylinder stretches out.
In preferred technological scheme, described hydraulic oil cylinder driving method also comprises step S3, after piston rod moves to precalculated position, enters step S3;
S3: disconnect the connection between the first oil cylinder, the rod chamber of the second oil cylinder and the rodless cavity of the second oil cylinder, the rod chamber of the first oil cylinder, the second oil cylinder is communicated with hydraulic oil container, and the rodless cavity of the second oil cylinder is communicated with pressure oil-source.
In preferred technological scheme, after step s 3, described hydraulic oil cylinder driving method also comprises step S4;
S4: disconnect the first oil cylinder, the rod chamber of the second oil cylinder and the connection of hydraulic oil container, and disconnect the rodless cavity of the second oil cylinder and the connection of pressure oil-source.
In preferred technological scheme, after step s4, described hydraulic oil cylinder driving method also comprises step S5;
S5: be communicated with the rod chamber of the first oil cylinder (1), the rod chamber of the second oil cylinder (2) by pressure oil-source (5), hydraulic oil container (6) is communicated with the rodless cavity of the first oil cylinder (1), the rodless cavity of the second oil cylinder (2).
Because the first oil cylinder is identical with the second oil cylinder internal diameter, and their rodless cavity area is only the twice of rod chamber area, therefore, in step s 2, the hydraulic oil cylinder driving mode that the present invention proposes can ensure that the hydraulic oil of same volume synchronously enters in the rodless cavity of the first oil cylinder and the second oil cylinder, and then ensures that the piston rod of the first oil cylinder and the second oil cylinder can synchronously stretch out.
Accompanying drawing explanation
The accompanying drawing forming a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
The hydraulic schematic diagram of oil cylinder synchronization hydraulic system under the first predetermined state that Fig. 1 provides for the specific embodiment of the invention;
The hydraulic schematic diagram of oil cylinder synchronization hydraulic system under the 3rd predetermined state that Fig. 2 provides for the specific embodiment of the invention;
The hydraulic schematic diagram of oil cylinder synchronization hydraulic system under the 4th predetermined state that Fig. 3 provides for the specific embodiment of the invention;
The hydraulic schematic diagram of oil cylinder synchronization hydraulic system under the second predetermined state that Fig. 4 provides for the specific embodiment of the invention.
Description of reference numerals:
1-the first oil cylinder 2-the second oil cylinder 3-the first switching valve 4-the second switching valve
5-pressure oil-source, 6-hydraulic oil container
Embodiment
It should be noted that, when not conflicting, the embodiment in the present invention and the feature in embodiment can combine mutually.Be described in detail below in conjunction with accompanying drawing 1 to 4 pair of specific embodiments of the invention.
As shown in Figures 1 to 4, the oil cylinder synchronization hydraulic system that the specific embodiment of the invention proposes specifically comprises pressure oil-source 5, hydraulic oil container 6, first oil cylinder 1, second oil cylinder 2, first switching valve 3 and the second switching valve 4, wherein, the first oil cylinder 1 is identical with the second oil cylinder 2 internal diameter, and their rodless cavity area is the twice of rod chamber area, as shown in Figures 1 to 4, during concrete selection, first switching valve 3 can adopt two-position four way change valve, second switching valve 4 can adopt three position four-way directional control valve, first switching valve 3 is provided with A, B, C and D tetra-hydraulic fluid ports, second switching valve 4 is provided with P, T, A and B tetra-hydraulic fluid ports, wherein, the A hydraulic fluid port of the first switching valve 3 is connected with the rodless cavity of the second oil cylinder 2, the rod chamber of C hydraulic fluid port and the first oil cylinder 1, the rod chamber of the second oil cylinder 2 connects, the B hydraulic fluid port of the first switching valve 3 is connected with the B hydraulic fluid port of the second switching valve 4, the D hydraulic fluid port of the first switching valve 3 and the A hydraulic fluid port of the second switching valve 4, the rodless cavity of the first oil cylinder 1 connects, the P hydraulic fluid port of the second switching valve 4 is connected with pressure oil-source 5, T hydraulic fluid port is connected with hydraulic oil container 6, the A hydraulic fluid port of the second switching valve 4 is also connected with the rodless cavity of the first oil cylinder 1.
As shown in Figure 1, under the first predetermined state, the left position work of the first switching valve 3, the left position work of the second switching valve 4, now, the A hydraulic fluid port of the first switching valve 3 is communicated with C hydraulic fluid port, the P hydraulic fluid port of the second switching valve 4 is communicated with A hydraulic fluid port, correspondingly, the rod chamber of the first oil cylinder 1 and the second oil cylinder 2 is all communicated with the rodless cavity of the second oil cylinder 2, the hydraulic oil that pressure oil-source 5 provides enters in the rodless cavity of the first oil cylinder 1 through the P hydraulic fluid port of the second switching valve 4 and A hydraulic fluid port, hydraulic oil in the rod chamber of simultaneously the first oil cylinder 1 and the second oil cylinder 2 enters in the rodless cavity of the second oil cylinder 2 through the C hydraulic fluid port of the first switching valve 3 and A hydraulic fluid port, in the process, the hydraulic oil volume entered in the rodless cavity of the first oil cylinder 1 and the second oil cylinder 2 is equal, make the piston rod of the first oil cylinder 1 and the second oil cylinder 2 stretch out identical length simultaneously, thus guarantee the synchronization motion of the first oil cylinder 1 and the second oil cylinder 2.
In a further embodiment, after the first oil cylinder 1 and the second oil cylinder 2 synchronization motion specifically can be determined according to applied environment to a certain extent, first switching valve 3 is switched to the work of right position, as shown in Figure 2, now, the A hydraulic fluid port of the first switching valve 3 is communicated with D hydraulic fluid port, B hydraulic fluid port is communicated with C hydraulic fluid port, correspondingly, first oil cylinder 1 is all communicated with pressure oil-source 5 with the rodless cavity of the second oil cylinder 2, first oil cylinder 1 is all communicated with hydraulic oil container 6 with the rod chamber of the second oil cylinder 2, the hydraulic oil that pressure oil-source 5 provides enters the rodless cavity of the first oil cylinder 1 and the second oil cylinder 2, hydraulic oil in the rod chamber of the first oil cylinder 1 and the second oil cylinder 2 flows into hydraulic oil container 6, by pressure oil-source 5 simultaneously directly to the first oil cylinder 1 and the second oil cylinder 2 fuel feeding can reduce hydraulic oil along stroke pressure loss, increase the power that the first oil cylinder 1 and the second oil cylinder 2 transmit.
In a further embodiment, when needing after the piston rod of the first oil cylinder 1 and the second oil cylinder 2 moves to precalculated position to maintain current state, the meta work of the second switching valve 4, as shown in Figure 3, now, the A hydraulic fluid port of the second switching valve 4, B hydraulic fluid port all disconnect with T hydraulic fluid port and P hydraulic fluid port, accordingly, the hydraulic oil that the hydraulic oil that pressure oil-source 5 provides can not enter in the first oil cylinder 1 and the second oil cylinder 2, first oil cylinder 1 and the second oil cylinder 2 also can not flow out, thus makes piston rod maintain current location all the time.
In the above-described embodiments, original state is returned in order to make oil cylinder, first switching valve 3 and all right position work of the second switching valve 4, as shown in Figure 4, now, the B hydraulic fluid port of the first switching valve 3 is communicated with C hydraulic fluid port, the A hydraulic fluid port of the first switching valve 3 is communicated with D hydraulic fluid port, the A hydraulic fluid port of the second switching valve 4 is communicated with T hydraulic fluid port, the B hydraulic fluid port of the second switching valve 4 is communicated with P hydraulic fluid port, correspondingly, the rod chamber of pressure oil-source 5 and the first oil cylinder 1, the rod chamber of the second oil cylinder 2 is communicated with, the rodless cavity of hydraulic oil container 6 and the first oil cylinder 1, the rodless cavity of the second oil cylinder 2 is communicated with, the hydraulic oil that pressure oil-source 5 provides enters the rod chamber of the first oil cylinder 1, the rod chamber of the second oil cylinder 2, and then order about the piston rod of the first oil cylinder 1, the piston rod of the second oil cylinder 2 all moves toward respective rodless cavity direction, piston rod is finally made to return to initial position.
Above-mentioned oil cylinder synchronization hydraulic system can be applied to the several work such as hoist, iron driller, front handling mobile crane mechanically, for iron driller, clamping clip on iron driller generally includes two calipers be oppositely arranged, first oil cylinder 1 and the second oil cylinder 2 drive a caliper respectively, and specific works process during clamping clip operation is:
First stage, as shown in Figure 1, first, the rod chamber of the rod chamber of the first oil cylinder 1, the second oil cylinder 2 is all communicated with the rodless cavity of the second oil cylinder 2, then, be communicated with pressure oil-source 5 by the rodless cavity of the first oil cylinder 1, the piston rod ordering about the first oil cylinder 1 and the second oil cylinder 2 synchronously stretches out, thus makes two calipers tentatively clamp drilling rod;
Second stage, as shown in Figure 2, disconnect the connection between the rod chamber of the first oil cylinder 1, second oil cylinder 2 and the rodless cavity of the second oil cylinder 2, the rod chamber of the first oil cylinder 1, second oil cylinder 2 is communicated with hydraulic oil container 6, and the rodless cavity of the second oil cylinder 2 is communicated with pressure oil-source 5; Because pressure oil-source 5 is directly to the first oil cylinder 1 and the second oil cylinder 2 fuel feeding, the chucking power of clamping clip is larger.
Phase III, as shown in Figure 3, disconnect the rod chamber of the first oil cylinder 1, second oil cylinder 2 and the connection of hydraulic oil container 6, and disconnect the rodless cavity of the second oil cylinder 2 and the connection of pressure oil-source 5, thus make clamping clip maintain current state.
Fourth stage, after iron driller completes drilling rod connection, clamping clip needs to return to original state, as shown in Figure 4, pressure oil-source 5 is communicated with the rod chamber of the first oil cylinder 1, the rod chamber of the second oil cylinder 2, hydraulic oil container 6 is communicated with the rodless cavity of the first oil cylinder 1, the rodless cavity of the second oil cylinder 2, thus makes the first oil cylinder 1 and the second oil cylinder 2 return to original state (namely clamping clip returns to original state).
By adopting above-mentioned oil cylinder synchronization hydraulic system, it is synchronous that Work machine better can realize two oil cylinders, and then promote operating efficiency, and extend the working life of Work machine self.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. an oil cylinder synchronization hydraulic system, is characterized in that, comprises pressure oil-source (5), hydraulic oil container (6), the first oil cylinder (1) and the second oil cylinder (2); Described first oil cylinder (1) is identical with the second oil cylinder (2) internal diameter, and their rodless cavity area is the twice of rod chamber area; Under the first predetermined state, the rod chamber of described first oil cylinder (1) and the second oil cylinder (2) is all communicated with the rodless cavity of the second oil cylinder (2), and the rodless cavity of described first oil cylinder (1) is communicated with pressure oil-source (5); Under the second predetermined state, the rod chamber of described first oil cylinder (1) and the second oil cylinder (2) is all communicated with pressure oil-source (5), and the rodless cavity of the first oil cylinder (1) and the second oil cylinder (2) is all communicated with hydraulic oil container (6).
2. oil cylinder synchronization hydraulic system according to claim 1, it is characterized in that, under the 3rd predetermined state, the rodless cavity of described first oil cylinder (1) and the second oil cylinder (2) is all communicated with pressure oil-source (5), and the rod chamber of the first oil cylinder (1) and the second oil cylinder (2) is all communicated with hydraulic oil container (6).
3. oil cylinder synchronization hydraulic system according to claim 2, it is characterized in that, under the 4th predetermined state, the first oil cylinder (1), the second oil cylinder (2) all disconnect with pressure oil-source (5) and hydraulic oil container (6).
4. oil cylinder synchronization hydraulic system according to claim 3, is characterized in that, comprises the first switching valve (3) and the second switching valve (4); Described first switching valve (3) and the second switching valve (4) coordinate and are used for described oil cylinder synchronization hydraulic system is switched between the first predetermined state, the second predetermined state, the 3rd predetermined state and the 4th predetermined state.
5. oil cylinder synchronization hydraulic system according to claim 4, is characterized in that, described first switching valve (3) is two-position four way change valve, and described second switching valve (4) is three position four-way directional control valve.
6. a Work machine, is characterized in that, comprises the oil cylinder synchronization hydraulic system described in claim 1 to 5 any one.
7. a hydraulic oil cylinder driving method, for ordering about the first oil cylinder (1) and the second oil cylinder (2) action, it is characterized in that, described first oil cylinder (1) is identical with the second oil cylinder (2) internal diameter, and their rodless cavity area is the twice of rod chamber area; Described hydraulic oil cylinder driving method comprises the following steps:
S1: the rod chamber of the rod chamber of the first oil cylinder (1), the second oil cylinder (2) is all communicated with the rodless cavity of the second oil cylinder (2);
S2: be communicated with pressure oil-source (5) by the rodless cavity of the first oil cylinder (1), the piston rod ordering about the first oil cylinder (1) and the second oil cylinder (2) stretches out.
8. hydraulic oil cylinder driving method according to claim 7, is characterized in that, after piston rod moves to precalculated position, enters step S3;
S3: disconnect the connection between the first oil cylinder (1), the rod chamber of the second oil cylinder (2) and the rodless cavity of the second oil cylinder (2), the rod chamber of the first oil cylinder (1), the second oil cylinder (2) is communicated with hydraulic oil container (6), and the rodless cavity of the second oil cylinder (2) is communicated with pressure oil-source (5).
9. hydraulic oil cylinder driving method according to claim 8, is characterized in that, also comprise step S4 after step S3;
S4: disconnect the first oil cylinder (1), the rod chamber of the second oil cylinder (2) and the connection of hydraulic oil container (6), and disconnect the rodless cavity of the second oil cylinder (2) and the connection of pressure oil-source (5).
10. hydraulic oil cylinder driving method according to claim 9, is characterized in that, also comprise step S5 after step S4;
S5: be communicated with the rod chamber of the first oil cylinder (1), the rod chamber of the second oil cylinder (2) by pressure oil-source (5), hydraulic oil container (6) is communicated with the rodless cavity of the first oil cylinder (1), the rodless cavity of the second oil cylinder (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510494508.6A CN105179342B (en) | 2015-08-13 | 2015-08-13 | Oil cylinder synchronization hydraulic system, Work machine and hydraulic oil cylinder driving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510494508.6A CN105179342B (en) | 2015-08-13 | 2015-08-13 | Oil cylinder synchronization hydraulic system, Work machine and hydraulic oil cylinder driving method |
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| Publication Number | Publication Date |
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| CN105179342A true CN105179342A (en) | 2015-12-23 |
| CN105179342B CN105179342B (en) | 2017-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510494508.6A Expired - Fee Related CN105179342B (en) | 2015-08-13 | 2015-08-13 | Oil cylinder synchronization hydraulic system, Work machine and hydraulic oil cylinder driving method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108488122A (en) * | 2018-03-30 | 2018-09-04 | 江苏恒立液压科技有限公司 | Multi-cylinder synchronization hydraulic system |
| CN109909476A (en) * | 2017-11-24 | 2019-06-21 | 东洋机械金属株式会社 | Squeeze pin control device and die casting machine with the squeeze pin control device |
| CN113697393A (en) * | 2021-08-03 | 2021-11-26 | 广东碧品居建筑工业化有限公司 | Long-stroke motion module and conveying device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH08128409A (en) * | 1994-09-08 | 1996-05-21 | Shinmeiwa Auto Eng Kk | Synchronizing device of hydraulic cylinder |
| JP2002144943A (en) * | 2000-11-14 | 2002-05-22 | Shinmeiwa Auto Engineering Ltd | Cylinder synchronous device of gate lifter |
| CN202064326U (en) * | 2011-04-27 | 2011-12-07 | 扬州市飞龙气动液压设备有限公司 | Synchronous split hydraulic hoist |
| CN104500471A (en) * | 2014-12-10 | 2015-04-08 | 西南铝业（集团）有限责任公司 | Synchronous hydraulic ascending and descending device |
-
2015
- 2015-08-13 CN CN201510494508.6A patent/CN105179342B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08128409A (en) * | 1994-09-08 | 1996-05-21 | Shinmeiwa Auto Eng Kk | Synchronizing device of hydraulic cylinder |
| JP2002144943A (en) * | 2000-11-14 | 2002-05-22 | Shinmeiwa Auto Engineering Ltd | Cylinder synchronous device of gate lifter |
| CN202064326U (en) * | 2011-04-27 | 2011-12-07 | 扬州市飞龙气动液压设备有限公司 | Synchronous split hydraulic hoist |
| CN104500471A (en) * | 2014-12-10 | 2015-04-08 | 西南铝业（集团）有限责任公司 | Synchronous hydraulic ascending and descending device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109909476A (en) * | 2017-11-24 | 2019-06-21 | 东洋机械金属株式会社 | Squeeze pin control device and die casting machine with the squeeze pin control device |
| CN109909476B (en) * | 2017-11-24 | 2021-07-06 | 东洋机械金属株式会社 | Extrusion pin control device and die casting machine having the same |
| CN108488122A (en) * | 2018-03-30 | 2018-09-04 | 江苏恒立液压科技有限公司 | Multi-cylinder synchronization hydraulic system |
| CN113697393A (en) * | 2021-08-03 | 2021-11-26 | 广东碧品居建筑工业化有限公司 | Long-stroke motion module and conveying device |
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| CN105179342B (en) | 2017-07-18 |
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