Driving device for push shovel of working machine, push shovel assembly and working machine

Abstract

The utility model relates to a driving device for a push shovel of an operation machine, a push shovel assembly and the operation machine. The driving device comprises a first oil cylinder, a second oil cylinder and two three-way joints. A converging port of the three-way connector arranged on the first oil cylinder is connected with a large-cavity main pipeline, a first shunting port of the three-way connector is directly connected to a large-cavity oil port of the first oil cylinder, and a second shunting port of the three-way connector is connected to a large-cavity oil port of the second oil cylinder through a large-cavity middle pipeline. A converging port of a three-way connector arranged on the second oil cylinder is connected with a small-cavity main pipeline, a first shunting port of the small-cavity main pipeline is directly connected to a small-cavity oil port of the second oil cylinder, and a second shunting port of the small-cavity main pipeline is connected to a small-cavity oil port of the first oil cylinder through a small-cavity middle pipeline. According to the driving device, a hydraulic switching block is omitted, the pipeline arrangement is simpler, and the cost is lower; and the whole pipeline is higher than the ground, so that the risk that the pipeline is crashed by obstacles can be reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of components for operating machinery, and in particular to a drive device for a pusher for operating machinery, a pusher assembly including the drive device, and operating machinery including the pusher assembly. Background Technology

[0002] Bombers are frequently used as optional working devices on construction machinery such as excavators. Bombers can be mounted at the front or rear of the chassis. One method of connecting the bomber to the chassis is a four-bar linkage, such as... Figure 1 As shown, the upper push arm located above and the two lower push arms located below connect the pusher to the chassis, forming a four-bar linkage structure. Two actuators (such as hydraulic cylinders, which can also be simply referred to as "cylinders" in this article) are connected to the upper push arm and the lower push arms respectively. The extension and retraction of the actuators drive the pusher to move, thereby achieving the desired operating action of the pusher.

[0003] Existing hydraulic cylinders have large and small cavity ports connecting their respective large (rodless) and small (rod) cavities. The hydraulic circuits for the cylinders' inlet and outlet typically include a main small cavity pipeline supplying inlet or outlet to both cylinders simultaneously, and a main large cavity pipeline supplying inlet or outlet to both cylinders simultaneously. The main small cavity pipeline connects to a hydraulic adapter block and then to two branch small cavity pipelines, thus connecting the small cavity ports of both cylinders. The main large cavity pipeline connects to another hydraulic adapter block and then to two branch large cavity pipelines, thus connecting the large cavity ports of both cylinders. This requires at least six flexible conduits, such as hoses, to form the inlet and outlet pipelines for these two cylinders. The excessive number and complex routing of these pipelines easily lead to crossings, which in turn cause wear between the crossing pipelines. In addition, the hydraulic adapter block and the connected pipelines are low to the ground, and the working environment of the machinery is harsh and complex. When the ground is uneven or there are obstacles (such as rocks), the pipelines are easily damaged by the obstacles. Utility Model Content

[0004] The purpose of this utility model is to solve at least one of the above-mentioned problems and / or other problems existing in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a drive device for a pusher of a working machine is provided. The drive device includes a first cylinder and a second cylinder arranged at intervals in the left-right direction of the working machine and driven and connected to the pusher. The first cylinder and the second cylinder are inclined along the up-down direction of the working machine and each has a large cavity oil port and a small cavity oil port on its respective cylinder barrel. The drive device also includes two T-joints respectively disposed at the upper end of the cylinder barrels of the first cylinder and the second cylinder. Each T-joint includes a confluence port, a first branch port and a second branch port. The confluence port of the T-joint disposed on the first cylinder is connected to a large cavity main pipe, its first branch port is directly connected to the large cavity oil port of the first cylinder, and its second branch port is connected to the large cavity oil port of the second cylinder through a large cavity intermediate pipe. The confluence port of the T-joint disposed on the second cylinder is connected to a small cavity main pipe, its first branch port is directly connected to the small cavity oil port of the second cylinder, and its second branch port is connected to the small cavity oil port of the first cylinder through a small cavity intermediate pipe.

[0006] According to one embodiment of the present invention, each of the three-way connectors includes a first shunt port, a second shunt port, and a merging port arranged in a "T" shape, wherein the second shunt port is perpendicular to the first shunt port and the merging port that are opposite to each other.

[0007] According to one embodiment of the present invention, the large-cavity oil port and the small-cavity oil port of each of the first oil cylinder and the second oil cylinder are arranged adjacent to each other along the circumference of the corresponding cylinder barrel.

[0008] According to one embodiment of the present invention, the merging ports of the two three-way connectors are arranged opposite to each other. The small cavity oil port of the first oil cylinder and the large cavity oil port of the second oil cylinder are respectively connected to the small cavity intermediate pipeline and the large cavity intermediate pipeline through two two-way connectors. The ports of the two two-way connectors that are respectively connected to the small cavity intermediate pipeline and the large cavity intermediate pipeline are arranged opposite to each other.

[0009] According to one embodiment of the present invention, the small cavity intermediate pipe and the large cavity intermediate pipe are arranged adjacent to each other and constrained together by a distance separated by a snap-fit ​​member.

[0010] According to one embodiment of the present invention, the driving device further includes an upper push arm for hinged connection of the upper ends of the first oil cylinder and the second oil cylinder, wherein the small cavity main pipe and the large cavity main pipe extend intersecting each other and are respectively fixed to the upper push arm at different distances from the bottom surface of the upper push arm by two pipe clamps.

[0011] According to one embodiment of the present invention, one of the two pipe clamps is directly fixed to the bottom surface of the upper push arm, and the other pipe clamp is indirectly fixed to the bottom surface of the upper push arm through a support column extending downward from the bottom surface of the upper push arm.

[0012] According to another aspect of the present invention, a pusher assembly is provided, the pusher assembly including a pusher and a drive device according to any of the preceding claims.

[0013] According to another aspect of the present invention, a working machine is provided, which includes the pusher assembly as described above.

[0014] This utility model's pusher drive device replaces the two hydraulic adapters in the prior art by using two simple tee connectors directly mounted on two hydraulic cylinders. The first branch port of one tee connector is directly connected to the large chamber port of the first hydraulic cylinder, and the first branch port of the other tee connector is directly connected to the small chamber port of the second hydraulic cylinder. This saves two hydraulic adapters and reduces the number of large and small chamber branch lines branching from the hydraulic adapters, resulting in a simpler overall piping layout and lower cost. Furthermore, the two tee connectors are located at the upper ends of the cylinder barrels of the two hydraulic cylinders, which correspondingly raises the pipes connected to the tee connectors above the ground, reducing the risk of damage to the pipes when the ground is uneven or there are obstacles such as stones. In addition, the large and small chamber main pipes are fixed to the bottom surface of the upper push arm by two pipe clamps with a height difference, avoiding interference between the two main pipes that extend and move relative to each other during operation. Attached Figure Description

[0015] The features and advantages of this utility model will become clear from the following detailed description provided with reference to the accompanying drawings. It should be understood that the following drawings are merely schematic and not necessarily drawn to scale, and therefore should not be considered as limitations on this utility model, wherein:

[0016] Figure 1 A perspective view of a pusher assembly according to an embodiment of the present invention is shown.

[0017] Figure 2 Show Figure 1 The pusher assembly shown omits the 3D view of the pusher.

[0018] Figure 3 Show Figure 2 The bottom view of the pusher assembly shown.

[0019] Figure 4 Show Figure 3 A partial enlarged view of one of the tee joints and its surrounding components of the drive unit of the pusher assembly shown.

[0020] Figure 5 Show Figure 3 A partial enlarged view of another tee connector of the drive unit shown and its surrounding components.

[0021] Figure 6 Show Figure 3 A magnified view of part A of the drive unit shown.

[0022] Explanation of reference numerals in the attached figures:

[0023] 100. Pusher; 200. Drive unit; 300. Chassis; 1. First hydraulic cylinder; 11. Large cavity oil port; 12. Small cavity oil port; 13. T-connector; 131. First branch port; 132. Second branch port; 133. Merging port; 14. Two-way connector; 2. Second hydraulic cylinder; 21. Large cavity oil port; 22. Small cavity oil port; 23. T-connector; 231. First branch port; 232. Second branch port; 233. Merging port; 24. Two-way connector; 3. Large cavity main pipeline; 4. Small cavity main pipeline; 5. Small cavity intermediate pipeline; 6. Large cavity intermediate pipeline; 71. Clip-on component; 72. Pipe clamp; 73. Pipe clamp; 74. Support column; 8. Upper push arm; 9. Lower push arm. Detailed Implementation

[0024] Embodiments of the present invention are described below with reference to the accompanying drawings. In the following description, numerous specific details are set forth to enable those skilled in the art to more fully understand and implement the present invention. However, it will be apparent to those skilled in the art that implementations of the present invention may not include some of these specific details. Furthermore, it should be understood that the present invention is not limited to the specific embodiments described. Rather, the present invention can be conceived to be implemented with any combination of the features and elements described below, regardless of whether they relate to different embodiments. Therefore, the following aspects, features, embodiments, and advantages are for illustrative purposes only and should not be construed as elements or limitations of the claims unless expressly set forth in the claims.

[0025] The terms "first" and "second" are used below to describe the elements of this application. These terms are used only to distinguish the individual elements and not to limit the nature, order, orientation, or number of these elements. The terms "comprising" and "having" are used to indicate an open-ended inclusion and mean that there may be other elements / components in addition to those listed.

[0026] Figure 1-6 A pusher assembly for a work machinery according to one embodiment of the present invention is shown. For example... Figure 1 and Figure 2As shown, the pusher assembly according to this embodiment may include a pusher 100 and a drive unit 200. The drive unit 200 is used to connect the pusher 100 to the chassis 300 of the working machinery, and to enable the pusher 100 to move relative to the chassis 300 to achieve the movement required for the pusher 100 to perform its operations. Figure 1 Only a portion of the chassis 300 is shown in the image.

[0027] It should be understood that, in the description of this utility model, directional terms such as "upper," "lower," "left," "right," "front," and "rear" are used with reference to... Figure 1 Regarding the arrangement of components of the operating machinery shown, the pusher 100 extends in the left-right direction (i.e., forward / backward direction) transverse to the front-back direction of the operating machinery, while the chassis 300, drive unit 200, and pusher 100 are arranged in a rear-to-front sequence. Figure 1 The direction closer to the ground is "down" (also) Figure 1 The lower part of the middle is called "the bottom", while the upper part is called "the top". Figure 1 (above the middle) Figure 1 The side closer to the observer is called "right", and the side farther away from the observer is called "left".

[0028] refer to Figures 1 to 3 As shown, the drive device 200 according to this embodiment may include a first hydraulic cylinder 1, a second hydraulic cylinder 2, a large cavity main pipe 3, a small cavity main pipe 4, a small cavity intermediate pipe 5, and a large cavity intermediate pipe 6. Both the first hydraulic cylinder 1 and the second hydraulic cylinder 2 can be double-acting hydraulic cylinders, each having a large cavity oil port and a small cavity oil port.

[0029] refer to Figures 2 to 4 As shown, the first hydraulic cylinder 1 is arranged on the right side and extends obliquely in the vertical direction of the working machine, with its upper end further away from the pusher 100 than its lower end. In this embodiment, the cylinder rod of the first hydraulic cylinder 1 is located at the lower end, and the cylinder barrel is located at the upper end. One end of the cylinder rod is drivenly connected to the pusher 100, and the other end of the cylinder rod is connected to the inner cavity of the cylinder barrel through a piston. The piston divides the inner cavity of the cylinder barrel into a large cavity near the upper end through which the cylinder rod does not pass and a small cavity near the lower end through which the cylinder rod passes. The upper end of the cylinder barrel of the first hydraulic cylinder 1 is provided with a large cavity oil port 11 and a small cavity oil port 12 arranged circumferentially thereafter, wherein the large cavity oil port 11 is closer to the upper part of the small cavity oil port 12. The large cavity oil port 11 of the first hydraulic cylinder 1 communicates directly with the large cavity of the cylinder barrel, and its small cavity oil port 12 communicates with the small cavity of the cylinder barrel through a small oil pipe (not shown) that is inclined downward. By way of example and not limitation, the large cavity oil port 11 and the small cavity oil port 12 are arranged adjacent to each other along the circumferential direction of the cylinder barrel of the first hydraulic cylinder 1 as shown in the illustrated embodiment. The proximity arrangement of the large cavity oil port 11 and the small cavity oil port 12 allows the related joints and pipelines connected to them to be arranged relatively close together, thereby improving the convenience of pipeline layout and space utilization.

[0030] refer to Figure 2 , Figure 3 and Figure 5 As shown, the second hydraulic cylinder 2 is located on the left side, symmetrically arranged with the first hydraulic cylinder 1 in the left-right direction of the working machine, and the orientation and installation method of the second hydraulic cylinder 2 are basically the same as those of the first hydraulic cylinder 1. The upper end of the cylinder barrel of the second hydraulic cylinder 2 is also provided with a large cavity oil port 21 and a small cavity oil port 22 arranged circumferentially. The difference is that the large cavity oil port 21 of the second hydraulic cylinder 2 is closer to the lower part of the small cavity oil port 22. The large cavity oil port 21 of the second hydraulic cylinder 2 can directly communicate with the large cavity of the cylinder barrel, and its small cavity oil port 22 communicates with the small cavity of the cylinder barrel through a downwardly inclined small oil pipe (not shown). Similar to the large cavity oil port 11 and small cavity oil port 12 of the first hydraulic cylinder, the large cavity oil port 21 and small cavity oil port 22 can also be arranged adjacent to each other along the circumference of the cylinder barrel of the second hydraulic cylinder 2, as shown in the illustrated embodiment.

[0031] In the illustrated embodiment, the cylinder located on the right side is referred to as the "first cylinder" and the cylinder located on the left side is referred to as the "second cylinder". However, in other embodiments, the cylinder located on the left side may also be referred to as the "first cylinder" and the cylinder located on the right side may be referred to as the "second cylinder".

[0032] refer to Figures 2 to 5 As shown, the drive device 200 according to this embodiment may further include two tee connectors 13 and 23. One tee connector 13 is located at the upper end of the cylinder barrel of the first cylinder 1 and may include a first branch port 131, a second branch port 132, and a confluence port 133. The first branch port 131 of the tee connector 13 is directly connected to the large cavity oil port 11 of the first cylinder 1, for example, by means of an external thread of the first branch port 131 being adapted to the internal thread of the large cavity oil port 11. The second branch port 132 is connected to the right end of the large cavity intermediate pipeline 6, and then connected to the large cavity oil port 21 of the second cylinder 2 through the large cavity intermediate pipeline 6. The confluence port 133 is connected to the large cavity main pipeline 3, which is connected to an external hydraulic source to provide a total inlet and outlet oil passage for the large cavities of the two cylinders. The other tee connector 23 is located at the upper end of the cylinder barrel of the second cylinder 2 and may include a first branch port 231, a second branch port 232, and a confluence port 233. The first branch port 231 of the tee connector 23 is directly connected to the small cavity port 22 of the second cylinder 2, for example, by means of an external thread of the first branch port 231 that is compatible with the internal thread of the small cavity port 22. The second branch port 232 is connected to the left end of the small cavity intermediate pipe 5, and then connected to the small cavity port 12 of the first cylinder 1 through the small cavity intermediate pipe 5. The confluence port 233 is connected to the small cavity main pipe 4, and the small cavity main pipe 4 is connected to an external hydraulic power source to provide a total inlet and outlet oil passage for the small cavities of the two cylinders.

[0033] Optionally, refer to Figure 4 and Figure 5 As shown, the first branch port 131, the second branch port 132, and the merging port 133 of the tee connector 13 can be roughly arranged in a "T" shape, wherein the first branch port 131 and the merging port 133 are arranged opposite each other and extend on the same axis, while the second branch port 132 extends perpendicular to this axis and communicates with the first branch port 131 and the merging port 133. The tee connector 23 can also have the same "T" shape structure as the tee connector 13, wherein the first branch port 231 and the merging port 233 are arranged opposite each other and extend on the same axis, while the second branch port 232 extends perpendicular to this axis and communicates with the first branch port 231 and the merging port 233.

[0034] In the illustrated embodiment, the large cavity oil port 11 of the first hydraulic cylinder 1 and the small cavity oil port 22 of the second hydraulic cylinder 2 can be arranged opposite to each other in the left-right direction of the working machinery. Furthermore, when the first branch port 131 of the "T"-shaped tee connector 13 is connected to the large cavity oil port 11 of the first hydraulic cylinder 1 and the first branch port 231 of the "T"-shaped tee connector 23 is connected to the small cavity oil port 22 of the second hydraulic cylinder 2, the confluence port 133 of the tee connector 13 and the confluence port 233 of the tee connector 23 are arranged opposite to each other. This is beneficial for the left-right symmetrical routing and arrangement of the large cavity main pipeline 3 connected to the confluence port 133 and the small cavity main pipeline 4 connected to the confluence port 233.

[0035] Continue to refer to Figure 4 and Figure 5 As shown, the drive device 200 according to this embodiment may further include two two-way connectors 14 and 24. The right port of the two-way connector 14 is connected to the small cavity oil port 12 of the first hydraulic cylinder 1, and the left port is connected to the small cavity intermediate pipeline 5. The left port of the two-way connector 24 is connected to the large cavity oil port 21 of the second hydraulic cylinder 2, and the right port is connected to the large cavity intermediate pipeline 6. The small cavity oil port 12 of the first hydraulic cylinder 1 and the large cavity oil port 21 of the second hydraulic cylinder 2 can be arranged opposite to each other in the left-right direction of the working machinery. Furthermore, the left port of the two-way connector 14 connected to the small cavity intermediate pipeline 5 and the right port of the two-way connector 24 connected to the large cavity intermediate pipeline 6 can be arranged opposite to each other. This symmetrical arrangement also facilitates the symmetrical routing and layout of the relevant intermediate pipelines.

[0036] refer to Figures 4 to 6As shown, in this embodiment, the right end of the small cavity intermediate pipe 5 is connected to the two-way connector 14, and the left end is connected to the second branch port 232 of the three-way connector 23; the right end of the large cavity intermediate pipe 6 is connected to the second branch port 132 of the three-way connector 13, and the left end is connected to the two-way connector 24. The second branch ports 132 and 232 are arranged parallel to each other and offset from the two-way connectors 14 and 24 respectively. The two-way connectors 14 and 24 are opposite to each other and arranged along the same axis. This results in the small cavity intermediate pipe 5 and the large cavity intermediate pipe 6 having adjacent and intersecting portions. Friction easily occurs at the intersection due to the actuation of the pusher 100 by the drive device 200. Therefore, as... Figure 6 As shown, a snap-fit ​​component 71 can be provided between the small cavity intermediate conduit 5 and the large cavity intermediate conduit 6. For example, the snap-fit ​​component 71 may include an intermediate piece and two straps, one strap wrapped around the outer periphery of the small cavity intermediate conduit 5 and the other strap wrapped around the outer periphery of the large cavity intermediate conduit 6. By fixing the two straps to the opposite ends of the intermediate piece, the small cavity intermediate conduit 5 and the large cavity intermediate conduit 6 can be restrained together adjacent to each other but spaced apart, thus avoiding interference between them and minimizing the space occupied by the conduit wiring.

[0037] refer to Figures 1 to 6 As shown, the drive device 200 according to this embodiment may further include an upper push arm 8 and two lower push arms 9. The upper push arm 8 is hinged to the chassis 300 and the push blade 100 on both sides in the front-rear direction of the working machine. The two lower push arms 9 are located below the upper push arm 8 and are symmetrically arranged on the left and right sides in the front-rear direction of the working machine. Each lower push arm 9 is also hinged to the chassis 300 and the push blade 100 on both sides in the front-rear direction of the working machine. The upper ends of the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are hinged to the position near the rear side of the upper push arm 8, and the lower ends are respectively connected to the position near the front side of the two lower push arms 9, so that the entire drive device 200 forms a four-bar linkage, and the first hydraulic cylinder 1 and the second hydraulic cylinder 2 are thus drivenly connected to the push blade 100. The large cavity main pipe 3 connects to the confluence port 133 of the tee connector 13 at its right end and extends to the left and rear along the left side of the chassis 300. The small cavity main pipe 4 connects to the confluence port 233 of the tee connector 23 at its left end and extends to the right and rear along the right side of the chassis 300, so that the large cavity main pipe 3 and the small cavity main pipe 4 extend intersecting each other below the upper push arm 8. For this purpose, the large cavity main pipe 3 and the small cavity main pipe 4 can be fixed to the upper push arm 8 at different distances from the bottom surface of the upper push arm 8 by two pipe clamps 72 and 73, so as to avoid interference and mutual wear between the intersecting large cavity main pipe 3 and small cavity main pipe 4 during operation.

[0038] According to an exemplary configuration, specifically as follows: Figure 3 and Figure 6As shown, pipe clamps 72 and 73 can have the same structure and each includes two clamping parts with half-holes. The two clamping parts are arranged opposite each other so that the two half-holes together define through holes for the large cavity main pipe 3 and the small cavity main pipe 4 to pass through, respectively. Pipe clamp 72 is sleeved on the outer periphery of the large cavity main pipe 3 and directly fixed to the bottom surface of the upper push arm 8. Pipe clamp 73 is sleeved on the outer periphery of the small cavity main pipe 4 and indirectly fixed to the bottom surface of the upper push arm 8 through a support column 74 extending downward from the bottom surface of the upper push arm 8. Thus, the large cavity main pipe 3 and the small cavity main pipe 4 are suspended at different distances from the bottom surface of the upper push arm 8 by the support column 74, that is, they have a height difference from the ground.

[0039] This utility model also provides a pusher assembly including a pusher 100 and the aforementioned drive device 200, and a working machine including the aforementioned pusher assembly.

[0040] Industrial applicability

[0041] The drive unit according to this invention can be used to drive the pusher blade of a work machine (such as a wheeled excavator). However, it should be understood that the drive unit according to this invention can also be applied to other machines or equipment having two hydraulic cylinders that require simultaneous oil inflow and outflow.

[0042] Existing pusher drive devices typically have two hydraulic cylinders. These cylinders require a main large-cavity pipeline and a main small-cavity pipeline to supply or return oil to their respective large and small cavities. Therefore, a common practice is to have the main large-cavity pipeline connected to two branch pipelines via a hydraulic adapter to connect to the large cavities of the two hydraulic cylinders, and a main small-cavity pipeline connected to two branch pipelines via another hydraulic adapter to connect to the small cavities of the two hydraulic cylinders. This results in numerous pipelines positioned low to the ground, increasing the risk of them colliding with obstacles on the ground.

[0043] Compared to existing technologies, the pusher drive device 200 of this invention replaces the two hydraulic adapter blocks in the prior art by using two simple T-connectors 13 and 23, which are directly installed on the two hydraulic cylinders 1 and 2 respectively. The first branch port 131 of one T-connector 13 is directly connected to the large cavity port 11 of the first hydraulic cylinder 1, and the first branch port 231 of the other T-connector 23 is directly connected to the small cavity port 22 of the second hydraulic cylinder 2. This saves two hydraulic adapter blocks and reduces the number of large and small cavity branch pipes that originally branched from the hydraulic adapter blocks, making the overall piping layout of the drive device simpler and less expensive. Furthermore, the two T-connectors 13 and 23 are respectively located at the upper ends of the cylinder barrels of the two hydraulic cylinders 1 and 2, which correspondingly raises the pipes connected to the T-connectors above the ground, reducing the risk of damage to the pipes when the ground is uneven or there are obstacles such as stones. In addition, the large cavity main pipe 3 and the small cavity main pipe 4 are fixed to the bottom surface of the upper push arm 8 by two pipe clamps 72 and 73 with a height difference, which avoids interference between the two main pipes that extend and move relative to each other during the movement.

[0044] Various modifications and variations can be made to the embodiments disclosed above without departing from the scope or spirit of this invention. Other embodiments of this invention will be apparent to those skilled in the art based on the practice of this invention disclosed in this specification. This specification and the examples disclosed herein should be considered illustrative only, and the true scope of this invention is defined by the appended claims and their equivalents.

Claims

1. A drive device (200) for a pusher (100) of a working machine, the drive device comprising a first hydraulic cylinder (1) and a second hydraulic cylinder (2) spaced apart in the left-right direction of the working machine and drivenly connected to the pusher, the first hydraulic cylinder and the second hydraulic cylinder being inclined in the up-down direction of the working machine and each having a large-cavity oil port and a small-cavity oil port provided on their respective cylinder barrels, characterized in that, The drive device further includes: Two T-joints (13, 23) are respectively installed at the upper end of the cylinder barrels of the first cylinder (1) and the second cylinder (2). Each T-joint includes a confluence port, a first branch port, and a second branch port. The confluence port (133) of the tee connector (13) on the first cylinder (1) is connected to the main pipeline (3) of the large cavity. Its first branch port (131) is directly connected to the large cavity oil port (11) of the first cylinder, and its second branch port (132) is connected to the large cavity oil port (21) of the second cylinder through the intermediate pipeline (6). The confluence port (233) of the three-way connector (23) set on the second cylinder (2) is connected to the main small cavity pipeline (4), its first branch port (231) is directly connected to the small cavity oil port (22) of the second cylinder, and its second branch port (232) is connected to the small cavity oil port (12) of the first cylinder through the small cavity intermediate pipeline (5).

2. The driving device (200) according to claim 1, characterized in that, Each of the tee connectors (13, 23) includes a first branch port (131, 231), a second branch port (132, 232), and a merging port (133, 233) arranged in a "T" shape, wherein the second branch port is perpendicular to the first branch port and the merging port that are opposite to each other.

3. The driving device (200) according to claim 2, characterized in that, The large cavity oil port (11, 21) and small cavity oil port (12, 22) of each of the first oil cylinder (1) and the second oil cylinder (2) are arranged adjacent to each other along the circumference of the corresponding cylinder.

4. The driving device (200) according to claim 3, characterized in that, The two T-joints are arranged opposite each other at their respective merging ports (133, 233). The small cavity oil port (12) of the first oil cylinder and the large cavity oil port (21) of the second oil cylinder are connected to the small cavity intermediate pipeline (5) and the large cavity intermediate pipeline (6) respectively through two T-joints (14, 24). The ports of the two T-joints that are respectively connected to the small cavity intermediate pipeline and the large cavity intermediate pipeline are arranged opposite each other.

5. The driving device (200) according to claim 4, characterized in that, The small cavity intermediate pipe (5) and the large cavity intermediate pipe (6) are arranged adjacent to each other and constrained together by a distance separated by a snap fastener (71).

6. The drive device (200) according to any one of claims 1 to 5, characterized in that, The drive device also includes an upper push arm (8) for hinged connection of the upper ends of the first cylinder (1) and the second cylinder (2). The small cavity main pipe (4) and the large cavity main pipe (3) extend intersecting each other and are respectively fixed to the upper push arm (8) at different distances from the bottom surface of the upper push arm by two pipe clamps (72, 73).

7. The driving device (200) according to claim 6, characterized in that, One of the two pipe clamps (72) is directly fixed to the bottom surface of the upper push arm (8), and the other pipe clamp (73) is indirectly fixed to the bottom surface of the upper push arm (8) through a support column (74) extending downward from the bottom surface of the upper push arm.

8. A pusher assembly, characterized in that, It includes a pusher (100) and a drive device (200) according to any one of claims 1 to 7.

9. A type of operating machinery, characterized in that, Includes the pusher assembly as described in claim 8.

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