Parallel hydraulic cylinder structure

Abstract

The utility model relates to the technical field of parallel hydraulic cylinders, in particular to a parallel hydraulic cylinder structure which comprises a mounting seat, and a first hydraulic cylinder is mounted on one side of the top end of the mounting seat. The first hydraulic cylinder and the second hydraulic cylinder are symmetrically mounted on the two sides of the mounting base, the support is mounted in the middle of the top end of the mounting base, and meanwhile the forced synchronization assembly composed of the first connecting rod, the connecting column, the synchronous rotating rod and the second connecting rod is jointly mounted between the support and piston rods of the first hydraulic cylinder and the second hydraulic cylinder; when the parallel hydraulic cylinder is used, synchronous stretching and retracting of piston rods on the first hydraulic cylinder and the second hydraulic cylinder can be achieved under the action of the forced synchronization assembly, and the defect that stretching and retracting of the first hydraulic cylinder and stretching and retracting of the second hydraulic cylinder are not synchronous due to adjustment errors of an oil inlet flow valve and an oil outlet flow valve is overcome. Therefore, when the parallel hydraulic cylinder is used, the problems of equipment damage, poor precision, large energy consumption and the like cannot be caused, and the reliability is better.

Description

Technical Field

[0001] This application relates to the field of parallel hydraulic cylinder technology, and in particular to a parallel hydraulic cylinder structure. Background Technology

[0002] A hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy, performing linear reciprocating motion (or oscillating motion). It has a simple structure and reliable operation. When used to achieve reciprocating motion, it eliminates the need for a speed reduction device, eliminates transmission backlash, and provides smooth movement, thus finding wide application in the hydraulic systems of various machines. The output force of a hydraulic cylinder is directly proportional to the effective area of ​​the piston and the pressure difference between its two sides. A hydraulic cylinder basically consists of a cylinder barrel and cylinder head, a piston and piston rod, a sealing device, a cushioning device, and a venting device. The cushioning and venting devices are optional depending on the specific application, while the other devices are essential.

[0003] The existing parallel hydraulic cylinders mainly connect the oil inlet pipes of each individual hydraulic cylinder together to achieve synchronous oil intake of each individual hydraulic cylinder, and connect the oil outlet pipes of each individual hydraulic cylinder together to achieve synchronous oil discharge of each individual hydraulic cylinder. The synchronous oil intake and discharge of each individual hydraulic cylinder are achieved by using oil inlet flow valves and oil outlet flow valves, thereby realizing the synchronous extension and retraction adjustment of each individual hydraulic cylinder on the parallel hydraulic cylinder.

[0004] While existing parallel hydraulic cylinders can achieve synchronized operation of individual hydraulic cylinders through synchronized oil intake and discharge, the oil flow rate in each individual hydraulic cylinder is prone to deviation due to uneven adjustment of the flow valve. This leads to asynchronous extension and retraction adjustments between the individual hydraulic cylinders, resulting in problems such as equipment damage, decreased accuracy, and increased energy consumption. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a parallel hydraulic cylinder structure that can ensure the synchronous extension and retraction of the first and second hydraulic cylinders through forced linkage, avoiding the drawbacks of asynchronous extension and retraction of the first and second hydraulic cylinders caused by adjustment errors of the inlet and outlet flow valves.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A parallel hydraulic cylinder structure includes a mounting base. A first hydraulic cylinder is mounted on one side of the top of the mounting base, and a second hydraulic cylinder is mounted on the other side of the top of the mounting base. An inverted U-shaped bracket is mounted in the middle of the top of the mounting base. A forced synchronization assembly is installed between the bracket, the piston rod of the first hydraulic cylinder, and the piston rod of the second hydraulic cylinder. The forced synchronization assembly includes a connecting rod one, a connecting shaft, a synchronization rod, and a connecting rod two. The connecting shaft is installed in the middle of the top of the bracket, the synchronization rod is installed at the bottom of the connecting shaft, the connecting rod one is installed on the upper part of the piston rod of the first hydraulic cylinder and one end of the synchronization rod, and the connecting rod two is installed on the upper part of the piston rod of the second hydraulic cylinder and the other end of the synchronization rod.

[0008] Optionally, a linkage oil inlet pipe is installed between the oil inlet of the first hydraulic cylinder and the oil inlet of the second hydraulic cylinder, and an oil inlet flow valve is installed at the oil inlet of the linkage oil inlet pipe.

[0009] Optionally, a linkage drain pipe is installed between the drain port of the first hydraulic cylinder and the drain port of the second hydraulic cylinder, and a drain flow valve is installed at the inlet of the linkage drain pipe.

[0010] Optionally, the mounting base, the bottom of the first hydraulic cylinder, and the bottom of the second hydraulic cylinder are all equipped with a synchronous limiting mechanism. The synchronous limiting mechanism includes a slot, a plug, a limiting hole, a limiting block, a linkage plate, a sliding cavity, a two-way lead screw, and a motor.

[0011] Optionally, there are two inserts and two slots. The two inserts are respectively installed at the bottom ends of the first hydraulic cylinder and the second hydraulic cylinder. The slot is opened on the mounting base at the part that mates with the insert. The vertical cross-section of the insert and the slot are both inverted T-shaped structures.

[0012] Optionally, each of the insert blocks has a limiting hole on both sides, the sliding cavity is reserved in the middle of the mounting base, the bidirectional lead screw is installed in the middle of the sliding cavity, and there are two linkage plates, which are symmetrically installed on the bidirectional lead screw.

[0013] Optionally, each of the linkage plates has a limiting block reserved at the position opposite the limiting hole, and the side wall of the slot opposite the limiting block has a hollow structure.

[0014] Optionally, the top end of the connecting shaft is rotatably connected to the bracket, the bottom end of the connecting shaft is welded to the synchronous rotating rod, one end of the connecting rod is rotatably connected to the piston rod of the first hydraulic cylinder, and the other end of the connecting rod is rotatably connected to the piston rod of the second hydraulic cylinder.

[0015] Optionally, one end of the second connecting rod is rotatably connected to the piston rod of the second hydraulic cylinder, and the other end of the second connecting rod is rotatably connected to the piston rod of the second hydraulic cylinder.

[0016] In summary, this application includes at least one of the following beneficial technical effects:

[0017] This invention symmetrically mounts a first hydraulic cylinder and a second hydraulic cylinder on both sides of a mounting base, and installs a bracket at the top center of the mounting base. A forced synchronization assembly, consisting of a connecting rod, a connecting column, a synchronizing rod, and a second connecting rod, is installed between the bracket and the piston rods of the first and second hydraulic cylinders. This allows the parallel hydraulic cylinders to achieve synchronized extension and retraction of the piston rods of the first and second hydraulic cylinders under the action of the forced synchronization assembly. This avoids the drawbacks of asynchronous extension and retraction of the first and second hydraulic cylinders caused by adjustment errors in the inlet and outlet flow valves. Therefore, this parallel hydraulic cylinder design does not cause equipment damage, decreased accuracy, or increased energy consumption during use, resulting in better reliability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the second hydraulic cylinder provided in the embodiments of this application;

[0020] Figure 3 This is a top sectional view of the mounting base provided in the embodiment of this application;

[0021] Figure 4 This is a top view provided in an embodiment of this application.

[0022] Explanation of reference numerals in the attached drawings: 1. First hydraulic cylinder; 2. Mounting base; 3. Linkage oil inlet pipe; 4. Oil inlet flow valve; 5. Second hydraulic cylinder; 6. Linkage oil outlet pipe; 7. Oil outlet flow valve; 8. Forced synchronization assembly; 81. Connecting rod one; 82. Connecting shaft; 83. Synchronization rotating rod; 84. Connecting rod two; 9. Synchronization limit mechanism; 91. Slot; 92. Insert block; 93. Limiting hole; 94. Limiting block; 95. Linkage plate; 96. Slide cavity; 97. Two-way lead screw; 98. Motor; 10. Bracket. Detailed Implementation

[0023] The present application will be further described in detail below with reference to the accompanying drawings.

[0024] To better understand the technical solutions presented in the embodiments of this application, the working principle of existing parallel hydraulic cylinders will first be introduced.

[0025] The existing parallel hydraulic cylinders mainly connect the oil inlet pipes of each individual hydraulic cylinder together to achieve synchronous oil intake of each individual hydraulic cylinder, and connect the oil outlet pipes of each individual hydraulic cylinder together to achieve synchronous oil discharge of each individual hydraulic cylinder. The synchronous oil intake and discharge of each individual hydraulic cylinder are achieved by using oil inlet flow valves and oil outlet flow valves, thereby realizing the synchronous extension and retraction adjustment of each individual hydraulic cylinder on the parallel hydraulic cylinder.

[0026] Please see Figure 1 and Figure 4 This application discloses a parallel hydraulic cylinder structure, including a mounting base 2. A first hydraulic cylinder 1 is mounted on one side of the top of the mounting base 2, and a second hydraulic cylinder 5 is mounted on the other side of the top of the mounting base 2. An inverted U-shaped bracket 10 is mounted in the middle of the top of the mounting base 2. A forced synchronization component 8 is installed between the bracket 10, the piston rod of the first hydraulic cylinder 1, and the piston rod of the second hydraulic cylinder 5. The forced synchronization component 8 includes a connecting rod 81, a connecting shaft 82, a synchronization rod 83, and a connecting rod 84. The connecting shaft 82 is installed in the middle of the top of the bracket 10, the synchronization rod 83 is installed at the bottom of the connecting shaft 82, the connecting rod 81 is installed on the upper part of the piston rod of the first hydraulic cylinder 1 and one end of the synchronization rod 83, and the connecting rod 84 is installed on the upper part of the piston rod of the second hydraulic cylinder 5 and the other end of the synchronization rod 83.

[0027] Specifically, when the first hydraulic cylinder 1 and the second hydraulic cylinder 5 operate synchronously, hydraulic oil is simultaneously introduced into both cylinders. After the oil enters the cylinders, it pushes the piston rods of the first and second hydraulic cylinders to move, thereby achieving synchronous extension of the piston rods. As the piston rods of the first and second hydraulic cylinders extend, the synchronous rotating rod 83 rotates under the action of connecting rod 81 and connecting rod 84, respectively. The rotation of the synchronous rotating rod 83 achieves forced synchronous extension and retraction of the piston rods of the first and second hydraulic cylinders, avoiding the drawback of asynchronous extension and retraction of the first and second hydraulic cylinders due to fluctuations in the oil flow rate.

[0028] Please see Figure 1 and Figure 4 A linkage oil inlet pipe 3 is installed between the oil inlet of the first hydraulic cylinder 1 and the oil inlet of the second hydraulic cylinder 5, and an oil inlet flow valve 4 is installed at the oil inlet of the linkage oil inlet pipe 3.

[0029] As one implementation method, the linkage oil inlet pipe 3 is mainly used to introduce external hydraulic oil into the first hydraulic cylinder 1 and the second hydraulic cylinder 5, and the oil inlet flow valve 4 is mainly used to control the oil inlet flow of the first hydraulic cylinder 1 and the second hydraulic cylinder 5.

[0030] Please see Figure 1 and Figure 4A linkage drain pipe 6 is installed between the drain port of the first hydraulic cylinder 1 and the drain port of the second hydraulic cylinder 5, and a drain flow valve 7 is installed at the inlet of the linkage drain pipe 6.

[0031] As one implementation method, the linkage drain pipe 6 is mainly used to synchronously discharge the hydraulic oil into the first hydraulic cylinder 1 and the second hydraulic cylinder 5, and the drain flow valve 7 is mainly used to control the drain flow of the first hydraulic cylinder 1 and the second hydraulic cylinder 5.

[0032] Please see Figures 1-4 The mounting base 2, the bottom of the first hydraulic cylinder 1, and the bottom of the second hydraulic cylinder 5 are all equipped with a synchronous limiting mechanism 9. The synchronous limiting mechanism 9 includes a slot 91, a plug 92, a limiting hole 93, a limiting block 94, a linkage plate 95, a sliding cavity 96, a two-way lead screw 97, and a motor 98.

[0033] In one implementation, when installing the first hydraulic cylinder 1 and the second hydraulic cylinder 5 onto the mounting base 2, the insert block 92 is first inserted into the corresponding slot 91. Then, under the action of the motor 98, the bidirectional lead screw 97 is rotated. After the bidirectional lead screw 97 rotates, the two linkage plates 95 will move closer together under the action of thread transmission. While the linkage plates 95 are moving, the limiting block 94 will be inserted into the corresponding limiting hole 93, thereby realizing the reliable limiting of the insert block 92 in the slot 91, so as to achieve the rapid synchronous limiting of the first hydraulic cylinder 1 and the second hydraulic cylinder 5.

[0034] Please see Figures 1-4 There are two inserts 92 and two slots 91. The two inserts 92 are respectively installed at the bottom of the first hydraulic cylinder 1 and the second hydraulic cylinder 5. The slots 91 are opened on the mounting base 2 and cooperate with the inserts 92. The vertical cross-section of both the inserts 92 and the slots 91 is an inverted T-shaped structure.

[0035] In one implementation, the insertion block 92 cooperates with the slot 91 to achieve the initial cooperation and installation of the first hydraulic cylinder 1 and the second hydraulic cylinder 5.

[0036] Please see Figures 1-4 Each insert 92 has limit holes 93 on both sides of its side wall. The slide cavity 96 is reserved in the middle of the mounting base 2. The bidirectional lead screw 97 is installed in the middle of the slide cavity 96. There are two linkage plates 95, which are symmetrically installed on the bidirectional lead screw 97.

[0037] As one implementation method, the sliding cavity 96 provides sufficient installation space for the linkage plate 95, the bidirectional lead screw 97, and the limiting block 94 to ensure convenient adjustment of the linkage plate 95.

[0038] Please see Figure 3 Each linkage plate 95 has a pre-reserved limit block 94 at the position opposite the limit hole 93, and the side wall of the slot 91 is hollow at the position opposite the limit block 94.

[0039] As one implementation method, the limiting block 94 cooperates with the corresponding limiting hole 93 to ensure that the first hydraulic cylinder 1 and the second hydraulic cylinder 5 are quickly limited on the mounting base 2.

[0040] Please see Figure 1 and Figure 4 The top end of the connecting shaft 82 is rotatably connected to the bracket 10, the bottom end of the connecting shaft 82 is welded to the synchronous rotating rod 83, one end of the connecting rod 81 is rotatably connected to the piston rod of the first hydraulic cylinder 1, and the other end of the connecting rod 81 is rotatably connected to the piston rod of the second hydraulic cylinder 5.

[0041] As one implementation method, when the piston rods on the first hydraulic cylinder 1 and the second hydraulic cylinder 5 extend and retract, the piston rods on the first hydraulic cylinder 1 and the second hydraulic cylinder 5 will be forced to extend and retract synchronously under the action of connecting rod 81, connecting rod 84 and synchronous rotating rod 83.

[0042] Please see Figure 1 and Figure 4 One end of the connecting rod 84 is rotatably connected to the piston rod of the second hydraulic cylinder 5, and the other end of the connecting rod 84 is rotatably connected to the piston rod of the second hydraulic cylinder 5.

[0043] As one implementation method, the rotating connection makes it easier for connecting rod 81 and connecting rod 84 to rotate relative to the piston rods of the first hydraulic cylinder 1 and the second hydraulic cylinder 5.

[0044] The specific working principle is as follows: First, the mounting base 2 is installed in the designated position. Then, the insert blocks 92 on the first hydraulic cylinder 1 and the second hydraulic cylinder 5 are inserted into the corresponding slots 91. Simultaneously, the double-acting screw 97 rotates under the action of the motor 98. After the double-acting screw 97 rotates, the two linkage plates 95 move synchronously towards each other under the action of the threaded transmission. As the linkage plates 95 move, they insert the limiting block 94 into the corresponding limiting hole 93, thereby achieving reliable limiting of the insert block 92 in the slot 91. This enables rapid synchronous limiting of the first hydraulic cylinder 1 and the second hydraulic cylinder 5. When the first hydraulic cylinder 1 and the second hydraulic cylinder 5 act synchronously, hydraulic oil is simultaneously introduced into both cylinders. After the oil enters the first hydraulic cylinder 1 and the second hydraulic cylinder 5, it will push the piston rods in the first hydraulic cylinder 1 and the second hydraulic cylinder 5 to move, thereby realizing the synchronous extension of the piston rods. While the piston rods on the first hydraulic cylinder 1 and the second hydraulic cylinder 5 are extending, the synchronous rotating rod 83 will rotate under the action of the connecting rod 1 81 and the connecting rod 2 84 respectively. After the synchronous rotating rod 83 rotates, the piston rods of the first hydraulic cylinder 1 and the second hydraulic cylinder 5 will be forced to extend and retract synchronously. This avoids the drawback of asynchronous extension and retraction of the first hydraulic cylinder 1 and the second hydraulic cylinder 5 caused by fluctuations in the oil flow rate. This ensures that the parallel hydraulic cylinder will not cause equipment damage, decreased accuracy, increased energy consumption and other problems during use, and has better reliability.

[0045] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A parallel hydraulic cylinder structure, characterized in that: The system includes a mounting base (2), on one side of the top of the mounting base (2) a first hydraulic cylinder (1) is mounted, on the other side of the top of the mounting base (2) a second hydraulic cylinder (5) is mounted, and a U-shaped bracket (10) is mounted in the middle of the top of the mounting base (2). A forced synchronization assembly (8) is installed between the bracket (10), the piston rod of the first hydraulic cylinder (1) and the piston rod of the second hydraulic cylinder (5). The forced synchronization assembly (8) includes a connecting rod one (81), a connecting shaft (82), a synchronous rotating rod (83) and a connecting rod two (84). The connecting shaft (82) is installed in the middle of the top of the bracket (10), the synchronous rotating rod (83) is installed at the bottom of the connecting shaft (82), the connecting rod one (81) is installed on the upper part of the piston rod of the first hydraulic cylinder (1) and one end of the synchronous rotating rod (83), and the connecting rod two (84) is installed on the upper part of the piston rod of the second hydraulic cylinder (5) and the other end of the synchronous rotating rod (83).

2. The parallel hydraulic cylinder structure according to claim 1, characterized in that: A linkage oil inlet pipe (3) is installed between the oil inlet of the first hydraulic cylinder (1) and the oil inlet of the second hydraulic cylinder (5), and an oil inlet flow valve (4) is installed at the oil inlet of the linkage oil inlet pipe (3).

3. The parallel hydraulic cylinder structure according to claim 2, characterized in that: A linkage drain pipe (6) is installed between the drain port of the first hydraulic cylinder (1) and the drain port of the second hydraulic cylinder (5), and a drain flow valve (7) is installed at the inlet of the linkage drain pipe (6).

4. The parallel hydraulic cylinder structure according to claim 1, characterized in that: The mounting base (2) is installed together with the bottom of the first hydraulic cylinder (1) and the bottom of the second hydraulic cylinder (5) with a synchronous limiting mechanism (9). The synchronous limiting mechanism (9) includes a slot (91), a plug (92), a limiting hole (93), a limiting block (94), a linkage plate (95), a sliding cavity (96), a two-way lead screw (97), and a motor (98).

5. The parallel hydraulic cylinder structure according to claim 4, characterized in that: There are two of each of the insert (92) and the slot (91). The two inserts (92) are respectively installed at the bottom of the first hydraulic cylinder (1) and the second hydraulic cylinder (5). The slot (91) is opened on the mounting base (2) and is engaged with the insert (92). The vertical cross-section of the insert (92) and the slot (91) are both inverted T-shaped structures.

6. The parallel hydraulic cylinder structure according to claim 5, characterized in that: Each of the insert blocks (92) has a limiting hole (93) on both sides of its side wall. The sliding cavity (96) is reserved in the middle of the mounting base (2). The bidirectional lead screw (97) is installed in the middle of the sliding cavity (96). There are two linkage plates (95), and the two linkage plates (95) are symmetrically installed on the bidirectional lead screw (97).

7. A parallel hydraulic cylinder structure according to claim 6, characterized in that: Each of the linkage plates (95) has a reserved limiting block (94) at the position opposite to the limiting hole (93), and the side wall of the slot (91) is hollow at the position opposite to the limiting block (94).

8. The parallel hydraulic cylinder structure according to claim 1, characterized in that: The top end of the connecting shaft (82) is rotatably connected to the bracket (10), the bottom end of the connecting shaft (82) is welded to the synchronous rotating rod (83), one end of the connecting rod (81) is rotatably connected to the piston rod of the first hydraulic cylinder (1), and the other end of the connecting rod (81) is rotatably connected to the piston rod of the second hydraulic cylinder (5).

9. A parallel hydraulic cylinder structure according to claim 8, characterized in that: One end of the second connecting rod (84) is rotatably connected to the piston rod of the second hydraulic cylinder (5), and the other end of the second connecting rod (84) is rotatably connected to the piston rod of the second hydraulic cylinder (5).

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