阅读说明：本技术 调节装置及载货机构 (Adjusting device and cargo carrying mechanism ) 是由 吴志伟 李德权 任涛 张喜斌 史弦立 于 2021-07-28 设计创作，主要内容包括：本发明提供了一种调节装置及载货机构,调节装置包括：供油组件；液压缸,液压缸的输出轴用于与待调节面的预设部位处连接；供油组件和液压缸之间通过连接管路连通,连接管路上设置有通断阀；蓄能器,通断阀和液压缸之间的管路与蓄能器连接并连通；其中,通断阀和供油组件之间的管路上具有回油位置,回油位置处连接有回油管路,回油管路可通断地设置。将本调节装置应用于AGV载货平台中,以对AGV载货平台的载货面进行水平调整,能够解决现有技术中的AGV载货平台的液压调节系统难以在保证调节精度的同时使系统的功率损失较小的问题。(The invention provides an adjusting device and a cargo carrying mechanism, wherein the adjusting device comprises: an oil supply assembly; the output shaft of the hydraulic cylinder is used for being connected with a preset part of the surface to be regulated; the oil supply assembly is communicated with the hydraulic cylinder through a connecting pipeline, and an on-off valve is arranged on the connecting pipeline; the pipeline between the on-off valve and the hydraulic cylinder is connected and communicated with the energy accumulator; the oil return position is connected with an oil return pipeline which can be arranged in an on-off mode. Be applied to AGV cargo platform with this adjusting device to carry out horizontal adjustment to AGV cargo platform's cargo surface, the hydraulic pressure governing system that can solve AGV cargo platform among the prior art makes the less problem of systematic power loss when guaranteeing to adjust the precision.)

1. An adjustment device, comprising:

an oil supply assembly;

the output shaft of the hydraulic cylinder (20) is used for being connected with a preset part of a surface to be regulated; the oil supply assembly is communicated with the hydraulic cylinder (20) through a connecting pipeline, and an on-off valve (50) is arranged on the connecting pipeline;

an accumulator (40), wherein a pipeline between the on-off valve (50) and the hydraulic cylinder (20) is connected and communicated with the accumulator (40);

the oil return device is characterized in that an oil return position (341) is arranged on a pipeline between the on-off valve (50) and the oil supply assembly, an oil return pipeline (32) is connected to the oil return position (341), and the oil return pipeline (32) can be arranged in an on-off mode.

2. The adjusting device according to claim 1, wherein an unloading valve (61) is arranged on the oil return pipeline (32), a first connecting position (343) is arranged on a pipeline between the on-off valve (50) and the hydraulic cylinder (20), and the unloading valve (61) is connected and communicated with the first connecting position (343) so as to control the on-off of an internal oil passage of the unloading valve (61) according to the pressure at the first connecting position (343) and the opening pressure of the unloading valve (61) and further control the on-off of the oil return pipeline (32).

3. The adjusting apparatus according to claim 2, characterized in that the unloading valve (61) has a first oil through chamber (611), a first oil inlet and a first oil outlet, both of which communicate with the first oil through chamber (611);

the oil return pipeline (32) comprises a first oil return pipe section (321) and a second oil return pipe section (322), two ends of the first oil return pipe section (321) are respectively connected and communicated with the oil return position (341) and the first oil inlet, and one end of the second oil return pipe section (322) is connected and communicated with the first oil outlet; and/or

The unloading valve (61) comprises a first movable member (612) movably arranged in the first oil through cavity (611), and the first movable member (612) comprises a first communication channel and a first blocking portion; when the first communication passage is located between the first oil inlet and the first oil outlet to communicate with both the first oil inlet and the first oil outlet, an internal oil passage of the unloading valve (61) is communicated; when the first shielding part is positioned between the first oil inlet and the first oil outlet so as to form shielding between the first oil inlet and the first oil outlet, the internal oil path of the unloading valve (61) is disconnected.

4. The adjusting apparatus according to claim 3, characterized in that, in a direction perpendicular to the direction of distribution of the first oil inlet and the first oil outlet, the first movable member (612) has a first side and a second side disposed opposite to each other, the cavity of the first oil through cavity (611) located on the first side of the first movable member (612) communicates with the first connecting position (343), and the second side of the first movable member (612) is provided with a first elastic member (613).

5. The adjusting device according to claim 2, characterized in that a pipeline between the on-off valve (50) and the oil supply assembly is provided with an overflow position (342), an overflow pipeline (33) is connected to the overflow position (342), and an overflow valve (63) is arranged on the overflow pipeline (33) so as to control the on-off of the overflow pipeline (33) through the on-off of an internal oil circuit of the overflow valve (63); wherein the opening pressure of the relief valve (63) is greater than the opening pressure of the unloading valve (61).

6. The adjusting apparatus as claimed in claim 5, characterized in that the overflow valve (63) has a second passage chamber (631), a second oil inlet and a second oil outlet, both of which communicate with the second passage chamber (631);

the overflow pipeline (33) comprises a first overflow pipe section (331) and a second overflow pipe section (332), two ends of the first overflow pipe section (331) are respectively connected and communicated with the overflow position (342) and the second oil inlet, and one end of the second overflow pipe section (332) is connected and communicated with the second oil outlet; and/or

The overflow valve (63) comprises a second movable piece (632) movably arranged in the second oil passage cavity (631), and the second movable piece (632) comprises a second communication passage and a second blocking part; when the second communication channel is positioned between the second oil inlet and the second oil outlet so as to be communicated with both the second oil inlet and the second oil outlet, an internal oil path of the overflow valve (63) is communicated; when the second shielding part is positioned between the second oil inlet and the second oil outlet so as to shield the second oil inlet and the second oil outlet, the internal oil path of the overflow valve (63) is disconnected.

7. The adjusting apparatus according to claim 6, characterized in that, in a direction perpendicular to the direction of distribution of the second oil inlet and the second oil outlet, the second movable member (632) has a first side and a second side disposed opposite to each other, the cavity of the second oil passing cavity (631) located on the first side of the second movable member (632) communicates with the first overflow pipe section (331), and the second side of the second movable member (632) is provided with a second elastic member (633).

8. The adjustment device according to claim 1,

the on-off valve (50) is a one-way valve so that the oil supply assembly supplies oil to the hydraulic cylinder (20); and/or

A regulating valve (62) is arranged on a section of the connecting pipeline between the energy accumulator (40) and the hydraulic cylinder (20), and the opening degree of the regulating valve (62) can be adjustably set so as to control the flow rate of the oil liquid supplied to the hydraulic cylinder (20); and/or

The oil supply assembly comprises a first oil tank (11) and a hydraulic pump (12) which are connected and communicated with each other, and the hydraulic pump (12) is communicated with the connecting pipeline.

9. The regulating device according to claim 1, characterized in that said connecting line comprises a first section (311), a second section (312) and a third section (313) communicating in sequence, said first section (311) being connected and communicating with said oil feed assembly, said third section (313) being connected and communicating with said hydraulic cylinder (20); the on-off valve (50) is arranged on the second road section (312);

the accumulator (40) is connected to the junction of the third section (313) and the second section (312); and/or

The connection of the first section (311) and the second section (312) forms the oil return position (341).

10. A cargo carrying mechanism comprising a cargo carrying platform and an adjustment device, wherein the adjustment device is as claimed in any one of claims 1 to 9, and the cargo carrying surface of the cargo carrying platform is a surface to be adjusted.

Technical Field

The invention relates to the field of hydraulic systems, in particular to an adjusting device and a cargo carrying mechanism.

Background

When the AGV trolley is used for transporting valuables, liquid articles and the like, the cargo platform of the AGV trolley is always required to keep a certain levelness, and the goods are prevented from being toppled due to uneven ground.

Due to the characteristics of high response speed, large load and the like, the hydraulic system is often used in occasions for horizontally adjusting the cargo carrying platform of the AGV trolley.

Existing level adjusting hydraulic systems generally have two types: one is that the M-type common electromagnetic directional valve is adopted to control the action of the leveling hydraulic cylinder; and the other type adopts an O-shaped proportional electromagnetic directional valve to control the action of the leveling hydraulic cylinder.

In the two types of adjusting hydraulic systems, although the hydraulic pump can be unloaded when the electromagnetic reversing valve is closed so as to prevent the hydraulic system from overheating, the leveling control precision of the hydraulic systems is low, overshoot is easy to occur, the response speed is low, and the leveling effect is poor.

Although the latter can realize the accurate control of the leveling of the AGV cargo platform, the response speed is high and the leveling effect is good; however, in most of the time during the leveling operation of the AGV cargo platform, the control flow rate required by the proportional electromagnetic directional valve is small, which may cause the flow rate and pressure at the outlet of the hydraulic pump to be too high, thereby causing the problems of heating of the hydraulic system, large power loss of the hydraulic system, energy waste, and the like.

Disclosure of Invention

The invention mainly aims to provide an adjusting device and a loading mechanism, and aims to solve the problem that a hydraulic adjusting system of an AGV loading platform in the prior art is difficult to ensure the adjusting precision and simultaneously causes less power loss of the system.

In order to achieve the above object, according to one aspect of the present invention, there is provided an adjusting apparatus comprising: an oil supply assembly; the output shaft of the hydraulic cylinder is used for being connected with a preset part of the surface to be regulated; the oil supply assembly is communicated with the hydraulic cylinder through a connecting pipeline, and an on-off valve is arranged on the connecting pipeline; the pipeline between the on-off valve and the hydraulic cylinder is connected and communicated with the energy accumulator; the oil return position is connected with an oil return pipeline which can be arranged in an on-off mode.

Furthermore, an unloading valve is arranged on the oil return pipeline, a first connecting position is arranged on a pipeline between the on-off valve and the hydraulic cylinder, and the unloading valve is connected and communicated with the first connecting position so as to control the on-off of an internal oil way of the unloading valve according to the pressure at the first connecting position and the opening pressure of the unloading valve and further control the on-off of the oil return pipeline.

Furthermore, the unloading valve is provided with a first oil through cavity, a first oil inlet and a first oil outlet, and the first oil inlet and the first oil outlet are both communicated with the first oil through cavity; the oil return pipeline comprises a first oil return pipe section and a second oil return pipe section, two ends of the first oil return pipe section are respectively connected and communicated with the oil return position and the first oil inlet, and one end of the second oil return pipe section is connected and communicated with the first oil outlet; and/or the unloading valve comprises a first movable piece movably arranged in the first oil through cavity, and the first movable piece comprises a first communication channel and a first blocking part; when the first communication channel is positioned between the first oil inlet and the first oil outlet and is communicated with the first oil inlet and the first oil outlet, the internal oil path of the unloading valve is communicated; when the first shielding portion is located between the first oil inlet and the first oil outlet to form shielding between the first oil inlet and the first oil outlet, the internal oil path of the unloading valve is disconnected.

Further, along the direction perpendicular with the distribution direction of first oil inlet and first oil-out, first moving part has relative first side and the second side that sets up, and the cavity that is located the first side of first moving part of first logical oil pocket communicates with first hookup location, and the second side of first moving part is provided with first elastic component.

Furthermore, an overflow position is arranged on a pipeline between the on-off valve and the oil supply assembly, an overflow pipeline is connected to the overflow position, and an overflow valve is arranged on the overflow pipeline to control the on-off of the overflow pipeline through the on-off of an internal oil circuit of the overflow valve; the opening pressure of the overflow valve is greater than that of the unloading valve.

Furthermore, the overflow valve is provided with a second oil through cavity, a second oil inlet and a second oil outlet, and the second oil inlet and the second oil outlet are both communicated with the second oil through cavity; the overflow pipeline comprises a first overflow pipe section and a second overflow pipe section, two ends of the first overflow pipe section are respectively connected and communicated with the overflow position and the second oil inlet, and one end of the second overflow pipe section is connected and communicated with the second oil outlet; and/or the overflow valve comprises a second movable piece movably arranged in the second oil through cavity, and the second movable piece comprises a second communication channel and a second blocking part; when the second communication channel is positioned between the second oil inlet and the second oil outlet and is communicated with the second oil inlet and the second oil outlet, the internal oil path of the overflow valve is communicated; when the second shielding portion is located between the second oil inlet and the second oil outlet to form shielding between the second oil inlet and the second oil outlet, the internal oil path of the overflow valve is disconnected.

Further, along the direction perpendicular with the distribution direction of second oil inlet and second oil-out, the second moving part has relative first side and the second side that sets up, and the cavity that is located the first side of second moving part of second oil pocket is with first overflow pipe section intercommunication, and the second side of second moving part is provided with the second elastic component.

Furthermore, the on-off valve is a one-way valve so that the oil supply assembly supplies oil to the hydraulic cylinder; and/or a regulating valve is arranged on a section of the connecting pipeline between the energy accumulator and the hydraulic cylinder, and the opening degree of the regulating valve is adjustably set so as to control the flow of the oil liquid supplied to the hydraulic cylinder; and/or the oil supply assembly comprises a first oil tank and a hydraulic pump which are connected and communicated with each other, and the hydraulic pump is communicated with the connecting pipeline.

Furthermore, the connecting pipeline comprises a first road section, a second road section and a third road section which are sequentially communicated, the first road section is connected and communicated with the oil supply assembly, and the third road section is connected and communicated with the hydraulic cylinder; the on-off valve is arranged on the second road section; the energy accumulator is connected with the joint of the third road section and the second road section; and/or the joint of the first section and the second section forms an oil return position.

According to another aspect of the invention, a cargo carrying mechanism is provided, which comprises a cargo carrying platform and the adjusting device, wherein the cargo carrying surface of the cargo carrying platform is a surface to be adjusted.

By applying the technical scheme, the adjusting device comprises the hydraulic cylinder, the oil supply assembly and the energy accumulator, and the output shaft of the hydraulic cylinder is connected with the preset part of the surface to be adjusted to drive the preset part of the surface to be adjusted to move, so that the surface to be adjusted is adjusted. The oil supply assembly is communicated with the hydraulic cylinder through a connecting pipeline; when the on-off valve on the connecting pipeline is opened, the connecting pipeline is in a communicated state, and the oil supply assembly can supply oil to the hydraulic cylinder and can also charge liquid to the energy accumulator; when the oil flow required by the hydraulic cylinder is small, the on-off valve can be closed, and as the pipeline between the on-off valve and the hydraulic cylinder is connected and communicated with the energy accumulator, oil can be supplied to the hydraulic cylinder through the energy accumulator, the maximum oil supply flow of the energy accumulator is smaller than the minimum oil supply flow of the oil supply assembly, and the oil supply flow of the hydraulic cylinder can be conveniently and accurately controlled by supplying oil to the hydraulic cylinder through the energy accumulator.

Because the position department of returning oil on the pipeline between on-off valve and the fuel feeding unit is connected with back oil pipe, but back oil pipe break-make ground sets up, when the flow and the pressure of the fluid of fuel feeding unit export are great, can make back oil pipe be in the connected state, so that the fluid of fuel feeding unit export can flow through back oil pipe, and then realize the off-load to the fluid of fuel feeding unit export, the flow and the pressure of the fluid of avoiding the fuel feeding unit export are too big, and then avoid this adjusting device to appear generating heat, power loss is great, waste of energy, be applied to AGV cargo carrying platform, carry out horizontal adjustment with the cargo carrying face to AGV cargo carrying platform, thereby the hydraulic pressure governing system of AGV cargo carrying platform among the prior art is difficult to make the less problem of power loss of system when guaranteeing the regulation precision.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a system diagram of an adjusting device according to the invention;

FIG. 2 shows a schematic structural view of an unloader valve of an adjusting device according to the present invention;

fig. 3 shows a schematic representation of the relief valve of the regulating device according to the invention.

Wherein the figures include the following reference numerals:

11. a first oil tank; 12. a hydraulic pump; 13. a filter; 20. a hydraulic cylinder; 40. an accumulator; 50. an on-off valve;

311. a first road section; 312. a second road section; 313. a third road section; 32. an oil return line; 321. a first return oil pipe section; 322. a second return oil pipe section; 33. an overflow line; 331. a first overflow pipe section; 332. a second overflow pipe section; 341. an oil return position; 342. an overflow position; 343. a first connection location; 344. a second connection location;

61. an unloading valve; 611. a first oil through cavity; 612. a first movable member; 613. a first elastic member; 62. adjusting a valve; 63. an overflow valve; 631. a second oil passage cavity; 632. a second movable member; 633. a second elastic member; 71. a second oil tank; 72. a third oil tank; 81. a first control line; 82. a second control line; 83. is communicated with the pipeline.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The invention provides an adjusting device, please refer to fig. 1 to 3, the adjusting device comprises an oil supply component, a hydraulic cylinder 20 and an energy accumulator 40, an output shaft of the hydraulic cylinder 20 is used for connecting with a preset part of a surface to be adjusted; the oil supply assembly is communicated with the hydraulic cylinder 20 through a connecting pipeline, and an on-off valve 50 is arranged on the connecting pipeline; the pipeline between the on-off valve 50 and the hydraulic cylinder 20 is connected and communicated with the accumulator 40; an oil return position 341 is provided on a pipeline between the on-off valve 50 and the oil supply unit, an oil return pipeline 32 is connected to the oil return position 341, and the oil return pipeline 32 can be set in an on-off manner.

In the adjusting device of the present invention, the adjusting device includes a hydraulic cylinder 20, and an output shaft of the hydraulic cylinder 20 is used for being connected to a preset portion of a surface to be adjusted to drive the preset portion of the surface to be adjusted to move, so as to adjust the surface to be adjusted. For example, the cargo surface of a cargo platform often needs to be kept level to prevent tipping of cargo on the cargo platform; the loading surface of the loading platform forms the surface to be adjusted, the output shaft of the hydraulic cylinder 20 stretches along the vertical direction and is connected with the preset part of the loading surface of the loading platform so as to drive the preset part of the loading surface of the loading platform to move along the vertical direction, and then the height of the preset part of the loading surface of the loading platform is adjusted, so that the loading surface of the loading platform is kept horizontal; it should be noted that, when the cargo carrying platform is plate-shaped, the upper plate surface of the cargo carrying platform forms a cargo carrying surface, the hydraulic cylinder 20 is disposed below the cargo carrying platform, the output shaft of the hydraulic cylinder 20 is connected to the corresponding position of the lower plate surface of the cargo carrying platform corresponding to the preset position of the cargo carrying surface, and the preset position of the cargo carrying surface and the corresponding position of the underground plate surface corresponding to the preset position of the cargo carrying surface are distributed along the vertical direction, so that the output shaft of the hydraulic cylinder 20 is connected to the preset position of the cargo carrying surface.

Optionally, the number of the adjusting devices is multiple, the output shafts of the hydraulic cylinders 20 of the multiple adjusting devices are connected with multiple preset positions of the surface to be adjusted in a one-to-one correspondence manner, and the multiple preset positions of the surface to be adjusted are arranged at intervals along the circumferential direction of the surface to be adjusted, so as to ensure the adjusting effect of the surface to be adjusted.

Specifically, the adjusting device further comprises an oil supply assembly and an accumulator 40, wherein the oil supply assembly is communicated with the hydraulic cylinder 20 through a connecting pipeline; when the on-off valve 50 on the connecting pipeline is opened, the connecting pipeline is in a communicated state, and the oil supply assembly can supply oil to the hydraulic cylinder 20 and can also charge the accumulator 40; when the oil flow required by the hydraulic cylinder 20 is small, the on-off valve 50 can be closed, and as the pipeline between the on-off valve 50 and the hydraulic cylinder 20 is connected and communicated with the energy accumulator 40, oil can be supplied to the hydraulic cylinder 20 through the energy accumulator 40 at the moment, the maximum oil supply flow of the energy accumulator 40 is smaller than the minimum oil supply flow of the oil supply component, and the oil supply flow of the hydraulic cylinder 20 can be conveniently and accurately controlled by supplying oil to the hydraulic cylinder 20 through the energy accumulator 40.

Because the oil return position 341 on the pipeline between the on-off valve 50 and the oil supply assembly is connected with the oil return pipeline 32, the oil return pipeline 32 can be set on or off, so when the flow and the pressure of the oil at the outlet of the oil supply assembly are large, the oil return pipeline 32 can be in a communicated state, so that the oil at the outlet of the oil supply assembly can flow out through the oil return pipeline 32, further, the unloading of the oil at the outlet of the oil supply assembly is realized, the phenomena of overlarge flow and pressure of the oil at the outlet of the oil supply assembly are avoided, further, the phenomena of heating, large power loss, energy waste and the like of the adjusting device are avoided, the adjusting device is applied to the AGV cargo carrying platform, so that the horizontal adjustment is carried out on the cargo carrying surface of the AGV cargo carrying platform, and the problem that the hydraulic adjusting system of the AGV cargo carrying platform in the prior art is difficult to ensure the adjusting precision and simultaneously cause the small power loss of the system is solved.

Alternatively, one end of the oil return line 32 is connected to and communicated with the oil return position 341, and the other end of the oil return line 32 is communicated with the second oil tank 71, so that the oil in the oil return line 32 can flow back into the second oil tank 71.

It should be noted that the oil pressure at the oil return position 341 is equal to the oil pressure at the outlet of the oil feeding unit.

In the present embodiment, an unloading valve 61 is disposed on the oil return line 32, so that the oil return line 32 is controlled to be opened or closed by the unloading valve 61.

Specifically, a first connection position 343 is provided on a pipeline between the on-off valve 50 and the hydraulic cylinder 20, and the unloading valve 61 is connected and communicated with the first connection position 343, so as to control on-off of an internal oil passage of the unloading valve 61 according to oil pressure at the first connection position 343 and opening pressure of the unloading valve 61, and further control on-off of the oil return pipeline 32.

Specifically, the first connection position 343 is connected to and communicates with the unloader valve 61 through the first control line 81.

In a specific implementation process, when the on-off valve 50 is opened, oil flowing out of the oil supply assembly flows into the unloading valve 61 through the first connection position 343 and the first control pipeline 81, at this time, the oil pressure at the first connection position 343 is equal to the oil pressure at the outlet of the oil supply assembly, and the oil pressure at the first connection position 343 is equal to the oil pressure flowing into the unloading valve 61, so that the on-off of the internal oil path of the unloading valve 61 can be controlled according to the oil pressure at the first connection position 343 and the opening pressure of the unloading valve 61, so as to control the on-off of the oil return pipeline 32, and further control whether the outlet of the oil supply assembly can be unloaded; when the pressure of the oil flowing into the unloading valve 61 is smaller than the opening pressure of the unloading valve 61, the internal oil path of the unloading valve 61 is kept disconnected, that is, the unloading valve 61 is kept closed, and the oil return line 32 is kept disconnected; when the pressure of the oil flowing into the unloading valve 61 is greater than or equal to the opening pressure of the unloading valve 61, the internal oil passage of the unloading valve 61 is communicated, that is, the unloading valve 61 is opened, and the oil return passage 32 is communicated.

In the present embodiment, as shown in fig. 1 and 2, the unloading valve 61 has a first oil through chamber 611, a first oil inlet and a first oil outlet, both of which communicate with the first oil through chamber 611; the oil return pipeline 32 comprises a first oil return pipe section 321 and a second oil return pipe section 322, two ends of the first oil return pipe section 321 are respectively connected and communicated with the oil return position 341 and the first oil inlet, so that the pipe cavity at the oil return position 341 is communicated with the first oil inlet through the pipe cavity of the first oil return pipe section 321; one end of the second oil return pipe section 322 is connected and communicated with the first oil outlet, and the other end of the second oil return pipe section 322 is communicated with the second oil tank 71, so that the first oil outlet is communicated with the second oil tank 71 through a pipe cavity of the second oil return pipe section 322.

Specifically, the unloading valve 61 includes a first movable member 612 movably disposed in a first oil passage chamber 611, and the first movable member 612 includes a first communication passage and a first blocking portion; when the first communication passage is located between the first oil inlet and the first oil outlet to communicate with both the first oil inlet and the first oil outlet, the internal oil passage of the unloading valve 61 is communicated; when the first shielding portion is located between the first oil inlet and the first oil outlet to form shielding between the first oil inlet and the first oil outlet, the internal oil passage of the unloading valve 61 is broken.

Specifically, along a direction perpendicular to the distribution direction of the first oil inlet and the first oil outlet, the first movable member 612 has a first side and a second side which are arranged oppositely, a cavity of the first oil passing cavity 611 located at the first side of the first movable member 612 is communicated with the first connection position 343, that is, two ends of the first control pipeline 81 are respectively connected and communicated with the first connection position 343 and a cavity of the first oil passing cavity 611 located at the first side of the first movable member 612, so that a pipe cavity at the first connection position 343 is communicated with the cavity of the first oil passing cavity 611 located at the first side of the first movable member 612 through a pipe cavity of the first control pipeline 81; a second side of the first movable member 612 is provided with a first elastic member 613.

Specifically, the distribution directions of the first communication passage and the first blocking portion are the same as those of the first side and the second side of the first movable member 612.

In a specific implementation process, the oil flowing out of the oil supply assembly flows into the cavity of the first oil through cavity 611 on the first side of the first movable member 612 through the first connection position 343 and the first control pipeline 81, and is used for generating pressure and acting force on the first movable member 612, so that the first movable member 612 is movably disposed under the acting force of the oil and the elastic force of the first elastic member 613; wherein the oil pressure at the first connection location 343 is equal to the oil pressure flowing into the first side cavity of the first moveable member 612. Normally, when the first movable member 612 is in the original position, the first blocking portion is located between the first oil inlet and the first oil outlet, that is, the unloading valve 61 is closed; when the acting force of the oil on the first side of the first movable member 612 is smaller than the maximum elastic force of the first elastic member 613, the first movable member 612 maintains a state in which the first blocking portion thereof is located between the first oil inlet and the first oil outlet, that is, the unloading valve 61 maintains a closed state; when the acting force of the oil on the first side of the first movable member 612 is greater than the maximum elastic force of the first elastic member 613, the first movable member 612 can move to a state where the first communication passage thereof is located between the first oil inlet and the first oil outlet, and the unloading valve 61 is opened, at this time, the oil pressure at the first connection position 343 is greater than or equal to the opening pressure of the unloading valve 61; wherein the opening pressure of the unloading valve 61 is greater than or equal to the maximum elastic force of the first elastic member 613. When the acting force of the oil on the first side of the first movable member 612 is reduced and is less than the maximum elastic force of the first elastic member 613, the first movable member 612 rebounds to a state where the first blocking portion thereof is located between the first oil inlet and the first oil outlet.

In the present embodiment, a second connection position 344 is provided on the pipe between the on-off valve 50 and the hydraulic cylinder 20, and the accumulator 40 is connected and communicated with the second connection position 344; specifically, the accumulator 40 is connected and communicated with the second connection position 344 through the communication pipe 83, so that the accumulator 40 is communicated with the lumen at the second connection position 344 through the lumen of the communication pipe 83. Wherein the oil pressure at the first connection position 343 and the oil pressure at the second connection position 344 are equal.

Optionally, the first connection location 343 and the second connection location 344 coincide.

In the present embodiment, the on-off valve 50 is a check valve to supply oil to the hydraulic cylinder 20 from the oil supply unit and prevent the high-pressure oil in the accumulator 40 from flowing back to the oil supply unit, i.e., prevent the high-pressure oil in the accumulator 40 from flowing back to the hydraulic pump 12, so as to prevent the hydraulic pump 12 from being damaged by impact.

In a specific implementation process, after the oil return pipeline 32 is communicated, the oil at the outlet of the oil supply assembly flows to the oil return pipeline 32, and the oil pressure at the first connecting position 343 is greater than the oil pressure at the outlet of the oil supply assembly, so that the on-off valve 50 is disconnected; as the hydraulic cylinder 20 operates, the oil pressure at the first connection position 343 is gradually reduced, that is, the force and pressure of the oil on the first side of the first movable member 612 are gradually reduced.

In the present embodiment, the line between the on-off valve 50 and the oil supply unit has an overflow position 342, an overflow line 33 is connected to the overflow position 342, and the overflow line 33 is provided so as to be on-off; wherein, the oil pressure at the overflow position 342 is equal to the oil pressure at the oil return position 341, and the oil pressure at the overflow position 342 is equal to the oil pressure at the outlet of the oil supply assembly.

Optionally, the overflow position 342 and the return position 341 coincide.

Specifically, the overflow pipeline 33 is provided with an overflow valve 63, so that the on-off of the overflow pipeline 33 is controlled through the on-off of an internal oil path of the overflow valve 63; the opening pressure of the relief valve 63 is greater than the opening pressure of the unloading valve 61, that is, when the oil pressure at the oil return position 341 is less than the opening pressure of the unloading valve 61, both the unloading valve 61 and the relief valve 63 are closed; when the oil pressure at the oil return position 341 is greater than the opening pressure of the unloading valve 61 and less than the opening pressure of the overflow valve 63, the unloading valve 61 is opened, and the overflow valve 63 is closed; when the oil pressure at the oil return position 341 is larger than the opening pressure of the relief valve 63, the relief valve 63 opens. Normally, the relief valve 63 is opened only when the unloading valve 61 fails, that is, only when the unloading valve 61 fails, the oil pressure at the outlet of the oil supply unit may be greater than the opening pressure of the relief valve 63; when the unloading valve 61 fails, the outlet of the hydraulic pump 12 cannot be unloaded, which may cause the pressure of the oil at the outlet of the hydraulic pump 12 to be too high, and if the oil is not unloaded through the overflow line 33, the adjusting device may be damaged.

Alternatively, one end of the overflow line 33 is connected to and communicates with the overflow position 342, and the other end of the overflow line 33 communicates with the third tank 72, so that the oil in the overflow line 33 flows back into the third tank 72.

In the present embodiment, as shown in fig. 1 and 3, the relief valve 63 has a second oil passage chamber 631, a second oil inlet and a second oil outlet, both of which are communicated with the second oil passage chamber 631; the overflow pipeline 33 comprises a first overflow pipe section 331 and a second overflow pipe section 332, wherein two ends of the first overflow pipe section 331 are respectively connected and communicated with an overflow position 342 and a second oil inlet, so that a pipe cavity at the overflow position 342 is communicated with the second oil inlet through a pipe cavity of the first overflow pipe section 331; one end of the second overflow pipe section 332 is connected and communicated with the second outlet port, and the other end of the second overflow pipe section 332 is communicated with the third oil tank 72, so that the second outlet port is communicated with the third oil tank 72 through the pipe cavity of the second overflow pipe section 332.

Specifically, the relief valve 63 includes a second mover 632 movably disposed in the second oil passage chamber 631, the second mover 632 including a second communication passage and a second blocking portion; when the second communication passage is located between the second oil inlet and the second oil outlet to communicate with both the second oil inlet and the second oil outlet, the internal oil path of the overflow valve 63 is communicated; when the second shielding portion is located between the second oil inlet and the second oil outlet to form shielding between the second oil inlet and the second oil outlet, the internal oil passage of the relief valve 63 is broken.

Specifically, along a direction perpendicular to the distribution direction of the second oil inlet and the second oil outlet, the second movable element 632 has a first side and a second side which are oppositely arranged, and a cavity of the second oil passing cavity 631 located at the first side of the second movable element 632 is communicated with the first overflow pipe section 331, that is, the oil pressure at the overflow position 342 is equal to the oil pressure flowing into the cavity of the first side of the second movable element 632; a second elastic member 633 is disposed on a second side of the second movable member 632.

Specifically, the distribution directions of the second communication passage and the second blocking portion are the same as the distribution directions of the first side and the second side of the second movable piece 632.

Specifically, the cavity of the second oil passage cavity 631 located on the first side of the second movable element 632 is communicated with the first overflow pipe section 331 through the second control pipeline 82, that is, two ends of the second control pipeline 82 are respectively connected and communicated with the cavity of the first side of the second movable element 632 and the first overflow pipe section 331.

Specifically, the second control pipeline 82 is connected with a first end of the first overflow pipe section 331, and the first end of the first overflow pipe section 331 is connected with the second oil inlet; the second end of first overflow leg 331 is connected to overflow location 342.

In a specific implementation process, the oil flowing out of the oil supply assembly flows into the cavity of the second oil passage chamber 631 located at the first side of the second movable element 632 through the overflow position 342 and the second control pipeline 82, and is used for generating pressure and acting force on the second movable element 632, so that the second movable element 632 is movably disposed under the acting force of the oil and the elastic force of the second elastic element 633. In a normal condition, when the second movable element 632 is in the original position, the second blocking portion is located between the second oil inlet and the second oil outlet, that is, the relief valve 63 is closed; when the acting force of the oil on the first side of the second movable element 632 is smaller than the maximum elastic force of the second elastic element 633, the second movable element 632 maintains the state that the second blocking portion is located between the second oil inlet and the second oil outlet, that is, the overflow valve 63 maintains the closed state; when the acting force of the oil on the first side of the second movable element 632 is greater than the maximum elastic force of the second elastic element 633, the second movable element 632 can move to a state that the second communication channel of the second movable element is located between the second oil inlet and the second oil outlet, the overflow valve 63 is opened, and the oil pressure at the overflow position 342 is greater than or equal to the opening pressure of the overflow valve 63; wherein, the opening pressure of the relief valve 63 is greater than or equal to the maximum elastic force of the second elastic member 633. When the acting force of the oil on the first side of the second movable member 632 is reduced and is smaller than the maximum elastic force of the second elastic member 633, the second movable member 632 rebounds to a state where the second blocking portion thereof is located between the second oil inlet and the second oil outlet.

Optionally, the first elastic member 613 and the second elastic member 633 are both springs.

In this embodiment, the connecting pipeline includes a first section 311, a second section 312, and a third section 313 that are sequentially communicated, the first section 311 is connected to and communicated with the oil supply unit, and the third section 313 is connected to and communicated with the hydraulic cylinder 20; the on-off valve 50 is provided on the second section 312.

Specifically, the accumulator 40 is connected with the junction of the third path segment 313 and the second path segment 312.

Specifically, the junction of the first path segment 311 and the second path segment 312 forms an oil return location 341.

In the present embodiment, a regulating valve 62 is disposed on a section of the connecting pipeline between the accumulator 40 and the hydraulic cylinder 20, and the opening of the regulating valve 62 is adjustably set to control the flow rate of the oil supplied to the hydraulic cylinder 20, so as to achieve precise adjustment of the preset portion of the surface to be regulated.

Specifically, the regulating valve 62 is a proportional valve, and the opening degree of the regulating valve 62 can be accurately controlled according to the magnitude of the current supplied to the regulating valve 62.

Specifically, the regulating valve 62 is provided on the third path section 313.

Optionally, the regulating valve 62 is a solenoid proportional directional valve; for example, the regulating valve 62 is an O-type electromagnetic proportional directional valve.

In a specific implementation process, when the oil flow required by the hydraulic cylinder 20 is small, the opening degree of the regulating valve 62 can be small, the on-off valve 50 is closed, and at this time, the accumulator 40 only supplies oil to the hydraulic cylinder 20. When the flow rate of the oil required for the hydraulic cylinder 20 is large, the oil supply unit supplies oil to the hydraulic cylinder 20.

In this embodiment, the oil supply unit includes a first oil tank 11 and a hydraulic pump 12 connected to each other and communicated with each other, and the hydraulic pump 12 is communicated with the connecting line so that the hydraulic pump 12 sucks oil from the first oil tank 11 and the oil sucked from the first oil tank 11 enters the connecting line, and the oil in the connecting line is used for charging the accumulator 40 or supplying the hydraulic cylinder 20. It should be noted that the above-mentioned "outlet of the oil feeding unit" refers to an outlet of the hydraulic pump 12.

Specifically, a filter 13 is further disposed on a communication line between the first oil tank 11 and the hydraulic pump 12 to filter the oil pumped from the first oil tank 11.

Alternatively, the second oil tank 71 and the first oil tank 11 may be the same oil tank; the third tank 72 may be the same as the first tank 11.

The invention also provides a cargo carrying mechanism which comprises a cargo carrying platform and the adjusting device, wherein the cargo carrying surface of the cargo carrying platform is a surface to be adjusted.

Optionally, the load carrying mechanism is an AGV cart and the load carrying platform is an AGV load carrying platform.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

in the adjusting device of the invention, the adjusting device comprises a hydraulic cylinder 20, an oil supply assembly and an energy accumulator 40, and an output shaft of the hydraulic cylinder 20 is used for being connected with the preset part of the surface to be adjusted so as to drive the preset part of the surface to be adjusted to move, thereby realizing the adjustment of the surface to be adjusted. The oil supply assembly is communicated with the hydraulic cylinder 20 through a connecting pipeline; when the on-off valve 50 on the connecting pipeline is opened, the connecting pipeline is in a communicated state, and the oil supply assembly can supply oil to the hydraulic cylinder 20 and can also charge the accumulator 40; when the oil flow required by the hydraulic cylinder 20 is small, the on-off valve 50 can be closed, and as the pipeline between the on-off valve 50 and the hydraulic cylinder 20 is connected and communicated with the energy accumulator 40, oil can be supplied to the hydraulic cylinder 20 through the energy accumulator 40 at the moment, the maximum oil supply flow of the energy accumulator 40 is smaller than the minimum oil supply flow of the oil supply component, and the oil supply flow of the hydraulic cylinder 20 can be conveniently and accurately controlled by supplying oil to the hydraulic cylinder 20 through the energy accumulator 40.

Because the oil return position 341 on the pipeline between the on-off valve 50 and the oil supply assembly is connected with the oil return pipeline 32, the oil return pipeline 32 can be set on or off, so when the flow and the pressure of the oil at the outlet of the oil supply assembly are large, the oil return pipeline 32 can be in a communicated state, so that the oil at the outlet of the oil supply assembly can flow out through the oil return pipeline 32, further, the unloading of the oil at the outlet of the oil supply assembly is realized, the phenomena of overlarge flow and pressure of the oil at the outlet of the oil supply assembly are avoided, further, the phenomena of heating, large power loss, energy waste and the like of the adjusting device are avoided, the adjusting device is applied to the AGV cargo carrying platform, so that the horizontal adjustment is carried out on the cargo carrying surface of the AGV cargo carrying platform, and the problem that the hydraulic adjusting system of the AGV cargo carrying platform in the prior art is difficult to ensure the adjusting precision and simultaneously cause the small power loss of the system is solved.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.