Hydraulic system for a stacker, stacker and method of operation

Abstract

The present application belongs to the technical field of hydraulic pressure, and particularly relates to a fluid pressure actuator, and more particularly relates to a hydraulic system of a stacker, the stacker and a working method, wherein the hydraulic system of the stacker is characterized in that after a clamping part is inserted into the end of an oil conveying pipe, the pipe wall of the oil conveying pipe is located between a clamping plate and the inner wall of the clamping part, when the clamping part rotates, the slope lifts the clamping plate, the clamping plate moves towards the inner wall of the clamping part, so as to support and clamp the end of the oil conveying pipe, thereby realizing the connection of the oil conveying pipe and the joint assembly, and facilitating the replacement of the oil conveying pipe after wear.

Description

Technical Field

[0001] This invention belongs to the field of hydraulic technology, specifically relating to fluid pressure actuators, and more particularly to a hydraulic system for a forklift, a forklift, and a working method thereof. Background Technology

[0002] Forklifts generate frequent vibrations during operation. Due to these frequent vibrations, the oil supply pipes connected to the connectors on the tilting cylinders of the forklifts are prone to wear, leading to hydraulic oil leakage. Traditional oil supply pipe and connector connections make it difficult to remove the oil supply pipes from the connectors, and it is also difficult to replace worn oil supply pipes.

[0003] Therefore, due to the technical problem of difficulty in replacing worn oil pipelines, it is necessary to design a hydraulic system for a forklift, a forklift itself, and its operating method.

[0004] It should be noted that the information disclosed in this background section is only for understanding the background technology of this application concept, and therefore, the above description is not considered to constitute prior art information. Summary of the Invention

[0005] This disclosure provides at least one hydraulic system for a forklift, a forklift, and a method for operating it.

[0006] In a first aspect, embodiments of this disclosure provide a hydraulic system for a forklift, comprising: A connector assembly, which is connected to a first connector on the cylinder body, and is adapted to clamp an oil supply pipe; The connector assembly includes: a connecting part and a clamping part; The connecting part is connected to the first connector; The clamping part is rotatably connected to the connecting part, and the clamping part is adapted to clamp the end of the oil pipeline; A ring is provided on the inner wall of the clamping part, and a plurality of arc-shaped holes are equally spaced on the side wall of the ring. The inner wall of the arc-shaped holes is provided with a slope. Several clamping plates are slidably disposed on the side of the connecting part near the clamping part, and the clamping plates pass through the corresponding arc-shaped holes; After the end of the oil pipeline is inserted into the clamping part, the pipe wall of the oil pipeline is located between the clamping plate and the inner wall of the clamping part. When the clamping part rotates, the ramp lifts the clamping plate, and the clamping plate moves towards the inner wall of the clamping part to open and clamp the end of the oil pipeline.

[0007] In one optional embodiment, a sealing groove is provided between the connecting part and the clamping part, and a sealing ring is provided in the sealing groove; The clamping part has a groove corresponding to the arc-shaped hole, the opening of the groove is located on the inner wall of the arc-shaped hole, and the groove is connected to the sealing groove. An L-shaped slider is slidably disposed within the groove, with one end of the slider located within the arc-shaped hole, and the portion of the slider located within the groove contacting the sealing ring.

[0008] In one alternative embodiment, the clamping plate is lifted and contacts the slider, and as the clamping part continues to rotate, the clamping plate drives the slider to move, and the slider squeezes the sealing ring.

[0009] In one optional embodiment, a limit ring is provided on the side of the clamping portion near the connecting portion; The connecting part has an annular groove corresponding to the limiting ring on the side near the clamping part. The limiting ring is located inside the annular groove.

[0010] In one optional embodiment, a first locking hole is provided on the connecting portion; The limiting ring has a second locking hole.

[0011] In one alternative embodiment, after the clamping part has finished rotating, the first locking hole aligns with the second locking hole, and the clamping part is locked by passing a bolt through the first locking hole and the second locking hole.

[0012] In one optional embodiment, a groove corresponding to the clamping plate is provided on the end face of the connecting part near the clamping part; One end of the clamping plate is slidably disposed within the groove.

[0013] Secondly, embodiments of this disclosure also provide a forklift machine, comprising: The aforementioned hydraulic system for the stacker is adopted.

[0014] Thirdly, this disclosure also provides a method for operating a stacker hydraulic system as described above, comprising: After the end of the oil pipeline is inserted into the clamping part, the pipe wall of the oil pipeline is located between the clamping plate and the inner wall of the clamping part. When the clamping part rotates, the ramp lifts the clamping plate, and the clamping plate moves towards the inner wall of the clamping part to open and clamp the end of the oil pipeline.

[0015] In one alternative embodiment, the clamping plate is lifted and contacts the slider, and as the clamping part continues to rotate, the clamping plate drives the slider to move, and the slider squeezes the sealing ring.

[0016] The beneficial effects of this invention are that, after the clamping part is inserted into the end of the oil pipe in the hydraulic system of this forklift, the pipe wall of the oil pipe is located between the clamping plate and the inner wall of the clamping part. When the clamping part rotates, the ramp lifts the clamping plate and moves towards the inner wall of the clamping part to open and clamp the end of the oil pipe, thereby facilitating the connection between the oil pipe and the connector assembly and facilitating the replacement of the oil pipe after wear.

[0017] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained through the structures particularly pointed out in the description and the drawings.

[0018] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a stacker hydraulic system provided in an embodiment of the present disclosure; Figure 2 A cross-sectional view of a connector assembly provided in an embodiment of this disclosure; Figure 3 This is an embodiment of the present disclosure. Figure 2 An enlarged schematic diagram of part A in the middle.

[0021] In the picture: The connector assembly includes: 1. Connecting part 11. Clamping plate 111. Annular groove 112. First locking hole 113. Sliding groove 114. Clamping part 12. Ring body 121. Arc hole 122. Inclined slope 123. Groove 124. Slider 125. Limiting ring 126. Second locking hole 127. Sealing groove 13. Sealing ring 131. 2. Hydraulic cylinder body; First connector 3; Oil pipeline 4. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] As used herein, the phrases “in one embodiment,” “according to one embodiment,” “in some embodiments,” etc., generally refer to the fact that a particular feature, structure, or characteristic following the phrase can be included in at least one embodiment of this disclosure. Therefore, a particular feature, structure, or characteristic can be included in more than one embodiment of this disclosure, such that these phrases do not necessarily refer to the same embodiment. As used herein, the terms “example,” “exemplary,” etc., are used to “serve as an example, instance, or illustration.” Any implementation, aspect, or design described herein as “example” or “exemplary” is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. Rather, the use of the terms “example,” “exemplary,” etc., is intended to present concepts in a specific manner.

[0024] Forklifts generate frequent vibrations during operation. Due to these frequent vibrations, the oil supply pipes connected to the connectors on the tilting cylinders of the forklifts are prone to wear, leading to hydraulic oil leakage. Traditional oil supply pipe and connector connections make it difficult to remove the oil supply pipes from the connectors, and it is also difficult to replace worn oil supply pipes.

[0025] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0026] like Figure 1 and Figure 2 As shown, at least one disclosed embodiment provides a hydraulic system for a forklift, including: a connector assembly 1, which is connected to a first connector 3 on a cylinder body 2, and the connector assembly 1 is adapted to clamp an oil supply pipe 4; the connector assembly 1 includes: a connecting portion 11 and a clamping portion 12; the connecting portion 11 is connected to the first connector 3; the clamping portion 12 is rotatably connected to the connecting portion 11, and the clamping portion 12 is adapted to clamp the end of the oil supply pipe 4; an annular body 121 is provided on the inner wall of the clamping portion 12, and a plurality of arc-shaped holes 122 are equidistantly opened on the side wall of the annular body 121. The inner wall of the arc-shaped hole 122 is provided with a ramp 123; several clamping plates 111 are slidably provided on the side of the connecting part 11 near the clamping part 12, and the clamping plates 111 pass through the corresponding arc-shaped hole 122; after the end of the oil pipe 4 is inserted into the clamping part 12, the pipe wall of the oil pipe 4 is located between the clamping plate 111 and the inner wall of the clamping part 12. When the clamping part 12 rotates, the ramp 123 lifts the clamping plate 111, and the clamping plate 111 moves towards the inner wall of the clamping part 12 to open and clamp the end of the oil pipe 4, thereby facilitating the connection between the oil pipe 4 and the connector assembly 1, and facilitating the replacement of the oil pipe 4 after wear.

[0027] In this embodiment, the clamping plate 111 may be provided with an inclined surface corresponding to the ramp 123, so that the ramp 123 can better lift the clamping plate 111.

[0028] In this embodiment, the cylinder body 2 may be provided with a plurality of first connectors 3 to meet the movement requirements of the piston rod inside the cylinder body 2, and each first connector 3 is provided with a connector assembly 1.

[0029] In this embodiment, when the oil pipe 4 needs to be replaced, part of the clamping plate 111 is located at the larger portion of the inner diameter of the arc-shaped hole 122. When the clamping plate 111 is located at the larger portion of the inner diameter of the arc-shaped hole 122, the distance between the clamping plate 111 and the inner wall of the clamping part 12 is greater than the wall thickness of the oil pipe 4. The end of the oil pipe 4 can be easily and conveniently inserted between the clamping plate 111 and the inner wall of the clamping part 12. After the end of the oil pipe 4 is inserted, by rotating the clamping part 12, the ramp 123 lifts the clamping plate 111, and the clamping plate 111 moves towards the inner wall of the clamping part 12 to open and clamp the end of the oil pipe 4. When the clamping plate 111 is located at the smaller portion of the inner diameter of the arc-shaped hole 122, the distance between the clamping plate 111 and the inner wall of the clamping part 12 is less than the wall thickness of the oil pipe 4, ensuring the clamping of the end of the oil pipe 4.

[0030] like Figure 3 As shown, in an optional embodiment, a sealing groove 13 is provided between the connecting part 11 and the clamping part 12, and a sealing ring 131 is provided in the sealing groove 13; a groove 124 corresponding to the arc-shaped hole 122 is opened in the clamping part 12, the opening of the groove 124 is located on the inner wall of the arc-shaped hole 122, and the groove 124 communicates with the sealing groove 13; an L-shaped slider 125 is slidably disposed in the groove 124, one end of the slider 125 is located in the arc-shaped hole 122, and the part of the slider 125 located in the groove 124 contacts the sealing ring 131.

[0031] In this embodiment, since the clamping part 12 and the connecting part 11 can rotate, a sealing ring 131 needs to be provided between them to ensure the sealing effect of the sealing ring 131.

[0032] In this embodiment, a spring can be connected between the slider 125 and the inner wall of the groove 124 to facilitate the reset of the slider 125 after movement.

[0033] In this embodiment, the portion of the slider 125 that extends into the arc-shaped hole 122 corresponds to the smaller portion of the inner diameter of the arc-shaped hole 122, so that the clamping plate 111 contacts the slider 125 after moving into the smaller portion of the inner diameter of the arc-shaped hole 122, and as the clamping part 12 continues to rotate, the clamping plate 111 can contact and push the slider 125 to move.

[0034] In this embodiment, the oil pipe 4 is replaced in the initial state. At this time, the end of the oil pipe 4 is inserted into the clamping part 12. The clamping plate 111 is located in the larger part of the inner diameter of the arc-shaped hole 122, which facilitates the insertion of the end of the oil pipe 4. After the end of the oil pipe 4 is inserted between the clamping plate 111 and the inner wall of the clamping part 12, as... Figure 2 As shown, Figure 2 A corresponding clamping plate 111 is hidden inside an arc-shaped hole 122. When the clamping part 12 is rotated clockwise, the ramp 123 lifts the clamping plate 111, and the clamping plate 111 moves toward the inner wall of the clamping part 12. The part of the clamping plate 111 located in the arc-shaped hole 122 moves from the larger part of the inner diameter of the arc-shaped hole 122 to the smaller part of the inner diameter of the arc-shaped hole 122, thus opening and clamping the end of the oil pipe 4. That is, the clamping plate 111 and the inner wall of the clamping part 12 cooperate to clamp the end of the oil pipe 4, completing the clamping after the replacement of the oil pipe 4, which facilitates the disassembly and installation of the oil pipe 4.

[0035] In this embodiment, after the clamping plate 111 moves to the smaller part of the inner diameter of the arc-shaped hole 122, as the clamping part 12 continues to rotate, the clamping plate 111 contacts and pushes the slider 125 to move the slider 125 to squeeze the sealing ring 131, ensuring the sealing effect of the sealing ring 131. After the clamping part 12 finishes rotating, the first locking hole 113 aligns with the second locking hole 127. At this time, the clamping part 12 is locked by passing a bolt through the first locking hole 113 and the second locking hole 127.

[0036] In this embodiment, when it is necessary to disassemble the oil pipe 4, the bolts are removed first, and then the clamping part 12 is rotated counterclockwise to loosen the sealing ring 131. At this time, the slider 125 can be reset by the spring to loosen the sealing ring 131. When the clamping plate 111 moves to the larger part of the inner diameter of the arc hole 122, the end of the oil pipe 4 is loosened to facilitate the removal of the oil pipe 4.

[0037] In one alternative embodiment, after the clamping plate 111 is lifted, it contacts the slider 125, and as the clamping part 12 continues to rotate, the clamping plate 111 drives the slider 125 to move, and the slider 125 squeezes the sealing ring 131.

[0038] In this embodiment, the groove 124 can be inclined, and a protrusion can be provided on the inner wall of the groove 124. A protrusion can be provided on the side wall of the slider 125. The protrusion contacts the side of the protrusion away from the clamping plate 111. When the clamping plate 111 drives the slider 125 to move, the protrusion moves along the protrusion, so that the length of the part of the slider 125 extending into the arc-shaped hole 122 is reduced. The slider 125 squeezes the sealing ring 131 to ensure the sealing effect.

[0039] like Figure 3As shown, in one optional embodiment, a limiting ring 126 is provided on the side of the clamping part 12 near the connecting part 11; an annular groove 112 corresponding to the limiting ring 126 is provided on the side of the connecting part 11 near the clamping part 12; the limiting ring 126 is located in the annular groove 112.

[0040] In this embodiment, the engagement of the limiting ring 126 and the annular groove 112 can limit and guide the rotation of the clamping part 12.

[0041] like Figure 3 As shown, in one optional embodiment, the connecting part 11 is provided with a first locking hole 113; the limiting ring 126 is provided with a second locking hole 127.

[0042] In one alternative embodiment, after the clamping part 12 has finished rotating, the first locking hole 113 is aligned with the second locking hole 127, and the clamping part 12 is locked by passing a bolt through the first locking hole 113 and the second locking hole 127.

[0043] In this embodiment, both the first locking hole 113 and the second locking hole 127 can be threaded holes; multiple first locking holes 113 and multiple second locking holes 127 can be provided to ensure the locking effect.

[0044] In one optional embodiment, the end face of the connecting part 11 near the clamping part 12 is provided with a sliding groove 114 corresponding to the clamping plate 111; one end of the clamping plate 111 is slidably disposed in the sliding groove 114.

[0045] In this embodiment, the length direction of the slide groove 114 can correspond to the radial direction of the internal space of the clamping part 12. The internal space of the clamping part 12 can be approximately cylindrical, so that the clamping plate 111 can move radially along the clamping part 12. The slide groove 114 can guide and limit the movement of the clamping plate 111.

[0046] In this embodiment, a spring for resetting can also be provided between the clamping plate 111 and the inner wall of the slide groove 114.

[0047] At least one other disclosed embodiment also provides a forklift, including: employing the forklift hydraulic system described above.

[0048] At least one other disclosed embodiment also provides a working method using the above-described stacker hydraulic system, comprising: after the end of the oil pipe 4 is inserted into the clamping part 12, the pipe wall of the oil pipe 4 is located between the clamping plate 111 and the inner wall of the clamping part 12; when the clamping part 12 rotates, the ramp 123 lifts the clamping plate 111, and the clamping plate 111 moves toward the inner wall of the clamping part 12 to open and clamp the end of the oil pipe 4.

[0049] In one alternative embodiment, after the clamping plate 111 is lifted, it contacts the slider 125, and as the clamping part 12 continues to rotate, the clamping plate 111 drives the slider 125 to move, and the slider 125 squeezes the sealing ring 131.

[0050] In summary, the hydraulic system of this forklift allows the oil pipe 4 to be inserted into the clamping part 12 at the end. The pipe wall of the oil pipe 4 is located between the clamping plate 111 and the inner wall of the clamping part 12. When the clamping part 12 rotates, the ramp 123 lifts the clamping plate 111, and the clamping plate 111 moves towards the inner wall of the clamping part 12 to open and clamp the end of the oil pipe 4. This facilitates the connection between the oil pipe 4 and the connector assembly 1, and makes it easy to replace the oil pipe 4 after it wears out.

[0051] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0052] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0053] Spatially relative terms, such as “inside,” “outside,” “below,” “below,” “down,” “above,” “up,” etc., may be used herein to describe the relationship between one element or feature illustrated in the figures and another element or feature. In addition to the orientations depicted in the figures, spatially relative terms may be intended to cover different orientations of the device in use or operation. For example, if the device in the figure is flipped, an element described as “below” or “under” other elements or features would be oriented as “above” other elements or features.

[0054] Based on the above-described preferred embodiments of the present invention, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the inventive concept. The technical scope of this invention is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A hydraulic system for a forklift, characterized in that, include: A connector assembly (1) is connected to a first connector (3) on the cylinder body (2), and the connector assembly (1) is adapted to clamp the oil pipe (4). The connector assembly (1) includes: a connecting part (11) and a clamping part (12); The connecting part (11) is connected to the first connector (3); The clamping part (12) is rotatably connected to the connecting part (11), and the clamping part (12) is adapted to clamp the end of the oil pipeline (4); The inner wall of the clamping part (12) is provided with a ring (121), and a plurality of arc-shaped holes (122) are provided at equal intervals on the side wall of the ring (121), and the inner wall of the arc-shaped holes (122) is provided with a ramp (123). A plurality of clamping plates (111) are slidably disposed on one side of the connecting part (11) near the clamping part (12), and the clamping plates (111) pass through the corresponding arc-shaped holes (122). The ramp (123) divides the arc-shaped hole (122) into a smaller inner diameter portion and a larger inner diameter portion; After the end of the oil pipe (4) is inserted into the clamping part (12), the pipe wall of the oil pipe (4) is located between the clamping plate (111) and the inner wall of the clamping part (12). When the clamping part (12) rotates, the ramp (123) lifts the clamping plate (111), and the clamping plate (111) moves towards the inner wall of the clamping part (12). The clamping plate (111) moves from the larger part of the inner diameter of the arc hole (122) to the smaller part of the inner diameter of the arc hole (122) to open and clamp the end of the oil pipe (4).

2. The stacker hydraulic system as described in claim 1, characterized in that: A sealing groove (13) is provided between the connecting part (11) and the clamping part (12), and a sealing ring (131) is provided in the sealing groove (13). The clamping part (12) has a groove (124) corresponding to the arc-shaped hole (122) inside. The opening of the groove (124) is located on the inner wall of the arc-shaped hole (122), and the groove (124) is connected to the sealing groove (13). An L-shaped slider (125) is slidably disposed in the groove (124). One end of the slider (125) is located in the arc-shaped hole (122), and the part of the slider (125) located in the groove (124) contacts the sealing ring (131).

3. The stacker hydraulic system as described in claim 2, characterized in that: After the clamping plate (111) is lifted up, it contacts the slider (125). As the clamping part (12) continues to rotate, the clamping plate (111) drives the slider (125) to move, and the slider (125) squeezes the sealing ring (131).

4. The stacker hydraulic system as described in claim 1, characterized in that: A limit ring (126) is provided on the side of the clamping part (12) near the connecting part (11). The connecting part (11) has an annular groove (112) corresponding to the limiting ring (126) on one side near the clamping part (12). The limiting ring (126) is located in the annular groove (112).

5. The stacker hydraulic system as described in claim 4, characterized in that: The connecting part (11) is provided with a first card hole (113); The limiting ring (126) is provided with a second locking hole (127).

6. The stacker hydraulic system as described in claim 5, characterized in that: After the clamping part (12) has finished rotating, the first locking hole (113) and the second locking hole (127) are aligned. After the bolt passes through the first locking hole (113) and the second locking hole (127), the clamping part (12) is locked.

7. The stacker hydraulic system as described in claim 1, characterized in that: The connecting part (11) has a groove (114) corresponding to the clamping plate (111) on its end face near the clamping part (12). One end of the clamping plate (111) is slidably disposed in the groove (114).

8. A forklift, characterized in that, include: The stacker hydraulic system described in any one of claims 1-7 is adopted.

9. A method for operating a stacker hydraulic system as described in claim 1, characterized in that, include: After the end of the oil pipe (4) is inserted into the clamping part (12), the pipe wall of the oil pipe (4) is located between the clamping plate (111) and the inner wall of the clamping part (12). When the clamping part (12) rotates, the ramp (123) lifts the clamping plate (111) and the clamping plate (111) moves towards the inner wall of the clamping part (12) to open and clamp the end of the oil pipe (4).

10. The working method as described in claim 9, characterized in that: After the clamping plate (111) is lifted up, it contacts the slider (125). As the clamping part (12) continues to rotate, the clamping plate (111) drives the slider (125) to move, and the slider (125) squeezes the sealing ring (131).

Images