阅读说明：本技术 一种对接装置 (Butt joint device ) 是由 牛宏杰 周明霞 南尚军 孙翔宇 钱珍宝 汪琰 于 2020-06-30 设计创作，主要内容包括：本发明涉及作业机械技术领域,具体涉及一种对接装置。一种对接装置,包括一个第一接头和至少一个第二接头,每个第一接头和第二接头均对应连通有工作油路,第一接头对应的第一工作油路与油箱连通,所有所述第二接头对应的第二工作油路均通过泄油油路与所述泄油工作油路连通,所述泄油油路上设置有控制阀组以控制所述泄油油路上的液压油的流通。当属具快接与第二接头进行对接时,属具快接的芯体可推动第二接头内的液压油经泄油油路和第一工作油路泄油至油箱,无需将快换接头拧松即可完成接头的对接,解决了现有技术中的整机上的快接与属具上的快接对接时,需要将快换接头拧松才能成功对接接头,操作麻烦,且多次拧松可能损坏接头的技术问题。(The invention relates to the technical field of operation machinery, in particular to a butt joint device. The utility model provides a butt joint device, includes that a first connects and at least one second connects, and every first joint and second connect all to correspond the intercommunication and have working oil circuit, first working oil circuit and the oil tank intercommunication that the first joint corresponds, all the second working oil circuit that the second joint corresponds all through draining the oil circuit with draining the working oil circuit intercommunication, it is provided with the control valves in order to control to drain on the oil circuit the circulation of the last hydraulic oil of oil circuit to drain. When the accessory quick connector is in butt joint with the second connector, the core body of the accessory quick connector can push hydraulic oil in the second connector to drain oil to the oil tank through the oil drainage oil way and the first working oil way, and the butt joint of the connectors can be completed without unscrewing the quick-change connector.)

1. The utility model provides a butt joint device, includes that one first connects (1) and at least one second connects (2), and every first joint (1) and second connect (2) all correspond the intercommunication and have the working oil circuit, its characterized in that, first working oil circuit (11) and oil tank (5) intercommunication that first joint (1) corresponds, all second working oil circuit (21) that second joint (2) correspond all through draining oil circuit (3) with first working oil circuit (11) intercommunication, be provided with control valves (4) in order to control on draining oil circuit (3) the circulation of the hydraulic oil on draining oil circuit (3).

2. A docking device according to claim 1, wherein the control valve group (4) comprises a one-way control valve (41) and a switching valve (42), and the hydraulic oil in the second working oil path (21) is communicated to the switching valve (42) in a one-way manner under the control of the one-way control valve (41), and then enters the first working oil path (11) under the control of the switching valve (42) or is sealed in a pipeline by the switching valve (42).

3. A docking device according to claim 2, characterized in that said oil drainage circuit (3) comprises at least one branch circuit (31) and a main circuit (32), each branch circuit (31) being connected to the corresponding second joint (2) and main circuit (32), respectively, and said main circuit (32) being connected to said first working circuit (11).

4. A docking device according to claim 3, characterized in that said check valve (41) comprises a check valve provided on each branch oil passage (31).

5. A docking device according to claim 3, wherein the one-way control valve (41) comprises a shuttle valve provided at a place where the branch oil passage (31) and the main oil passage (32) communicate, and hydraulic oil on the branch oil passage (31) is communicated to the main oil passage (32) through the shuttle valve in one way.

6. A docking device according to any one of claims 3 to 5, characterized in that the switching valve (42) has two operating positions, when the switching valve (42) is in the first operating position, the main oil passage (32) is opened, and the hydraulic oil in the second joint (2) can be communicated to the first operating oil passage (11) for oil return through the oil drain passage (3); when the switching valve (42) is located at a second working position, the main oil path (32) is communicated in a one-way mode and is opposite to the flowing direction of the one-way control valve (41), and hydraulic oil in the second joint (2) is sealed in a pipeline.

7. A docking device according to claim 1, characterized by a hydraulic pump (6), said hydraulic pump (6) supplying oil to said first joint (1) and said second joint (2).

8. A docking device according to claim 7, further comprising a control valve (7), wherein the hydraulic pump (6) supplies oil to the first joint (1) and the second joint (2) under the control of the control valve (7).

9. The docking device as claimed in claim 8, wherein the control valve (7) has a pressure port p and a plurality of working ports, the pressure port p is communicated with an outlet of the hydraulic pump (6), the plurality of working ports are respectively communicated with the first working oil path (11) and the second working oil path (21), when the control valve (7) is in a neutral position, the pressure port p is only communicated with the working port corresponding to the first joint (1), and the working ports corresponding to the second joint (2) are all in a disconnected state.

10. A docking device according to any one of claims 7-9, characterized in that the pump outlet of the hydraulic pump (6) is also connected to the oil tank (5) via an overflow oil path (8), and an overflow valve (81) is arranged on the overflow oil path (8).

Technical Field

The invention relates to the technical field of operation machinery, in particular to a butt joint device.

Background

The skid-steer loader is used as an engineering machine with multiple accessories, and is characterized in that one complete machine can be provided with hundreds of accessories, so that the application range of the skid-steer loader is greatly expanded. However, because the accessories need to be replaced when different accessories are used, the whole machine is generally provided with the quick connection, so that various accessories can be conveniently replaced, and the working efficiency is improved.

When the accessory is replaced, the quick connection on the whole machine is connected with the reversing valve, when the quick connection on the accessory is connected with the quick connection on the whole machine, the oil between the quick-change connector and the reversing valve is sealed in a pipeline by the middle valve core in the reversing valve, and the oil is sealed between the quick connection and the hydraulic element in the accessory pipeline by the quick connection, so that the two ends of the pair of quick connections which need to be butted are both sealed oil with residual pressure. The oil in the pipeline needs to be compressed in the butt joint process of the quick joint, and the oil at the two ends of the quick joint cannot be compressed due to the fact that the sealed pressure oil cannot be compressed, so that the quick joint cannot be in butt joint, and the quick-change connector needs to be unscrewed to be successfully in butt joint.

Disclosure of Invention

The invention provides a butt joint device, which aims to solve the technical problems that when a quick joint on a complete machine is in butt joint with a quick joint on an accessory in the prior art, the quick-change joint needs to be unscrewed to successfully butt joint the joint, the operation is troublesome, and the joint can be damaged by multiple times of unscrewing. The technical scheme of the invention is as follows:

the utility model provides a butt joint device, includes that a first connects and at least one second connects, and every first joint and second connect all to correspond the intercommunication and have the working oil circuit, first working oil circuit and the oil tank intercommunication that the first joint corresponds, all the second working oil circuit that the second connects the correspondence all through draining the oil circuit with draining the working oil circuit intercommunication, be provided with the control valves in order to control on the draining oil circuit the circulation of the last hydraulic oil of draining the oil circuit.

According to the butt joint device, the first working oil path corresponding to the first joint is communicated with the oil tank, and the second working oil path corresponding to the second joint is communicated with the first working oil path through the oil drainage oil path, so that when the quick joint and the second joint are in butt joint, the core body of the quick joint of the accessory can push hydraulic oil in the second joint to drain oil to the oil tank through the oil drainage oil path and the first working oil path, and therefore butt joint of the joints can be completed without unscrewing the quick-change joint, operation is convenient, and the joints cannot be damaged.

According to one embodiment of the present invention, the control valve group includes a one-way control valve and a switching valve, and the hydraulic oil in the second working oil path is communicated to the switching valve in one way under the control of the one-way control valve and then enters the first working oil path or is sealed in a pipeline by the switching valve under the control of the switching valve.

According to one embodiment of the invention, the oil drainage oil path comprises at least one branch oil path and a main oil path, each branch oil path is communicated with the corresponding second joint and the main oil path respectively, and the main oil path is communicated with the first working oil path.

According to an embodiment of the present invention, the check control valve includes a check valve provided on each of the branch oil passages.

According to one embodiment of the invention, the one-way control valve comprises a shuttle valve, the shuttle valve is arranged at the communication position of the branch oil path and the main oil path, and the hydraulic oil on the branch oil path is communicated to the main oil path in a one-way mode through the shuttle valve.

According to one embodiment of the invention, the switching valve has two working positions, when the switching valve is located at the first working position, the main oil path is conducted, and the hydraulic oil in the second joint can be communicated to the working oil path of the first joint for oil return through the oil drainage oil path; when the switching valve is located at a second working position, the main oil path is conducted in a one-way mode and is opposite to the flowing direction of the one-way control valve, and hydraulic oil in the second joint is sealed in a pipeline.

According to an embodiment of the invention, further comprising a hydraulic pump supplying oil to the first and second connection.

According to an embodiment of the invention, the hydraulic pump supplies oil to the first and second joints under the control of the control valve.

According to an embodiment of the present invention, the control valve has a pressure port p and a plurality of working ports, the pressure port p is communicated with an outlet of the pump, the plurality of working ports are respectively communicated with the first working oil path and the second working oil path, when the control valve is in a neutral position, the pressure port p is only communicated with the working port corresponding to the first joint, and the working ports corresponding to the second joint are all in a disconnected state.

According to one embodiment of the invention, the pump outlet of the hydraulic pump is also communicated with the oil tank through an overflow oil path, and an overflow valve is arranged on the overflow oil path.

Based on the technical scheme, the invention can realize the following technical effects:

1. according to the butt joint device, the first working oil way corresponding to the first joint is communicated with the oil tank, and the second working oil way corresponding to the second joint is communicated with the second working oil way through the oil drainage oil way, so that when the quick joint and the second joint are in butt joint, the core body of the quick joint of the accessory can push hydraulic oil in the second joint to drain oil to the oil tank through the oil drainage oil way and the first working oil way, and therefore butt joint of the joints can be completed without unscrewing the quick-change joint, operation is convenient, and the joints cannot be damaged;

2. in the butt joint device, the oil drainage path is provided with the control valve group which can control the circulation of hydraulic oil on the oil drainage path, and specifically, the control valve group comprises a one-way control valve and a switching valve, the one-way control valve controls the one-way circulation of the hydraulic oil in each second working oil path to the switching valve, and the switching valve controls the hydraulic oil which flows to the switching valve to enter the first working oil path for oil drainage through the switching valve so as to facilitate the connection of a second joint with an accessory; or the hydraulic oil which flows to the switching valve can not be drained through the switching valve and is sealed in the pipeline, so that the hydraulic oil can participate in the work of accessories in respective pipelines; when the switching valve is positioned at the first working position, the main oil path is conducted, hydraulic oil in the second joint can flow into the first working oil path through the oil drainage oil path to return oil, namely the butt joint device is in a butt joint state and can be quickly connected with an accessory to be in butt joint; when the switching valve is located at the second working position, the main oil path is conducted in a one-way mode, the flowing direction of the main oil path is opposite to that of the one-way control valve, hydraulic oil in the second joint is sealed in the pipeline, and namely the butt joint device is in a sealing pressure maintaining state;

3. according to the butt joint device, the oil drainage oil path comprises the branch oil path and the main oil path, the second working oil path corresponding to the second joint can be communicated to the first working oil path, the one-way valve is arranged on the branch oil path or the shuttle valve is arranged between the branch oil path and the main oil path, so that the hydraulic oil on the second working oil path can be ensured to be communicated to the main oil path in a one-way mode, the switching valve is arranged on the main oil path, and the butt joint state and the sealing pressure maintaining state of the butt joint device can be switched;

4. the butt joint device also comprises a hydraulic pump and a control valve, wherein the hydraulic pump respectively supplies oil to the first joint and the second joint under the control of the control valve, when the control valve is positioned at a middle position, pressure oil pumped by the hydraulic pump can be circulated to the first working oil way through the control valve and then circulated to the oil tank for oil return, and no oil is supplied to the second joint; after the accessories are butted, the switching valve can be adjusted to be positioned at a second working position, and the control valve can be switched to control different accessories to work;

5. the butt joint device is also provided with an overflow oil way and an overflow valve to prevent the oil pressure of an oil way system from being overhigh, and when the oil pressure is overhigh, pressure oil can be drained through the overflow oil way and the overflow valve directly.

Drawings

FIG. 1 is a hydraulic system diagram of the docking device of the present invention;

in the figure: 1-a first linker; 11-a first working oil circuit; 2-a second linker; 21-a second working oil path; 3-oil drainage path; 31-branch oil path; 32-main oil circuit; 4-control valve group; 41-one-way control valve; 42-a switching valve; 5-an oil tank; 6-a hydraulic pump; 7-a control valve; 8-an overflow oil way; and 81-overflow valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

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 relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

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.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

As shown in fig. 1, the present embodiment provides a docking device, which includes a hydraulic pump 6 and at least two joints, the joints are used for docking with accessories in a quick-connection manner, the hydraulic pump 6 supplies oil to the at least two joints under the control of a control valve 7, and the accessories work under the action of pressure oil.

The at least two joints comprise a first joint 1 and at least one second joint 2, the first joint 1 is correspondingly communicated with a first working oil path 11, each second joint 2 is correspondingly communicated with a second working oil path 21, and pressure oil pumped by the hydraulic pump 6 respectively enters each working oil path under the control of the control valve 7 and drives corresponding accessories to work through each joint. Specifically, the first working oil path 11 correspondingly communicated with the first joint 1 is communicated with the oil tank 5, the second working oil path 21 correspondingly communicated with the second joint 2 is communicated with the first working oil path 11 through the oil drainage oil path 3, and hydraulic oil in the second joint 2 can enter the oil tank 5 through the second working oil path 21, the oil drainage oil path 3 and the first working oil path 11 in sequence to realize oil drainage.

The oil drainage path 3 includes branch oil paths 31 and a main oil path 32, the number of the branch oil paths 31 is the same as that of the second joints 2, the branch oil paths 31 are used for communicating the second working oil paths 21 corresponding to the second joints 2 with the main oil path 32, one end of the main oil path 32 is communicated with all the branch oil paths 31, and the other end of the main oil path 32 is communicated with the first working oil path 11. In this way, the hydraulic oil in each second joint 2 can drain to the oil tank 5 through the corresponding second working oil path 21, the corresponding branch oil path 31, the main oil path 32 and the first working oil path 11 in sequence.

In order to control the circulation of the hydraulic oil on the oil drainage oil path 3, a control valve group 4 is further arranged on the oil drainage oil path 3, the control valve group 4 comprises a one-way control valve 41 and a switching valve 42, and in the oil drainage process, the one-way control valve 41 is located at the upstream of the switching valve 42. The hydraulic oil in each second hydraulic fluid passage 21 flows in one direction to the switching valve 42 under the control of the one-way control valve 41, and then enters the first hydraulic fluid passage 11 or is sealed in a pipe under the control of the switching valve 42. Specifically, the check valve 41 may include at least one check valve respectively disposed in each of the branch oil passages 31 to control one-way circulation of oil in each of the branch oil passages 31; in addition, the check valve 41 may be a shuttle valve, and is disposed at a connection between the branch oil path 31 and the main oil path 32, and hydraulic oil on the branch oil path 31 flows through the shuttle valve to the main oil path 32 in a one-way manner. Specifically, the switching valve 42 is a two-position two-way valve, when the switching valve 42 is located at the first working position, the main oil path 32 is conducted, and the hydraulic oil flowing to the switching valve 42 can enter the first working oil path 11 through the switching valve 42 for oil drainage; when the switching valve 42 is in the second operating position, the main oil passage 32 is communicated in one direction and in the opposite direction to the one-way control valve 41, and the hydraulic oil in each second joint 2 is sealed in the pipe and cannot be drained. More specifically, the switching valve 42 has an inlet and an outlet, the inlet is communicated with the branch oil path 31, the outlet is communicated with the first working oil path 11, when the switching valve 42 is located at the first working position, the inlet and the outlet of the switching valve 42 are communicated, and the hydraulic oil in the second joint 2 can be drained to facilitate the butt joint; when the switching valve 42 is in the second operating position, the outlet to the inlet of the switching valve 42 are communicated in one direction, and the hydraulic oil in each second joint 2 is sealed in the pipe. The switching valve 42 may be a pilot-controlled two-position two-way valve or a two-position two-way solenoid valve.

The hydraulic pump 6 supplies oil to the first connection 1 and the second connection 2 under the control of a control valve 7. The control valve 7 is provided with a pressure oil port p and at least two working oil ports, the pressure oil port p of the control valve 7 is communicated with the pump outlet of the hydraulic pump 6, and the working oil ports of the control valve 7 are respectively communicated with the first working oil path 11 and the second working oil path 21. When the control valve 7 is in the middle position, the pressure oil port p is communicated with the working oil port corresponding to the first connector 1, other working oil ports are in a disconnected state, and the working oil pumped out by the hydraulic pump 6 enters the first working oil path 11 and then flows to the oil tank 5 for returning. When the control valve 7 is in the middle position, the adjustable switching valve 42 is located at the first working position, the accessory quick connector can be in butt joint with the second connector 2, and the core body of the accessory quick connector can push hydraulic oil in the second connector 2 to drain oil to the oil tank 5 through the oil drainage oil way 3 and the first working oil way 11, so that the butt joint is conveniently completed. After the accessories are connected, the switching valve 42 can be adjusted to be located at the second working position, and the control valve 7 can be reversed to supply oil to the second joint 2 so as to drive the corresponding accessories to work.

In this embodiment, the number of the second joints 2 is two, the number of the branch oil paths 31 is also two, and shuttle valves are arranged at the communication positions of the two branch oil paths 31 and the main oil path 32, and the shuttle valves may be single-ball shuttle valves or double-ball shuttle valves as long as the function of controlling the one-way circulation of the hydraulic oil can be achieved. The control valve 7 is a three-position six-way valve and has two pressure oil ports p and three working oil ports a, b and c, the two pressure oil ports p are both communicated with the pump outlet of the hydraulic pump 6, the working oil port a is communicated with the first working oil path 11, and the working oil port b and the working oil port c are respectively communicated with the two second working oil paths 21. When the control valve 7 is positioned at the middle position, one pressure oil port p is communicated with the working oil port a, and other oil ports are in a disconnected state; when the control valve 7 is positioned at the left position, the pressure oil port p is communicated with the working oil port b, and the pressure oil port p supplies oil to the second connector 2; when the control valve 7 is located at the right position, the pressure port p is communicated with the working port c, and the pressure port p supplies oil to the other second joint 2.

In order to ensure the safety of the hydraulic system, the pump outlet of the hydraulic pump 6 is also communicated with the oil tank 5 through an overflow oil path 8, an overflow valve 81 is arranged on the overflow oil path 8, and when the oil pressure at the pump outlet of the hydraulic pump 6 is too high, pressure oil can directly return to the oil tank 5 through the overflow oil path 8 and the overflow valve 81.

Based on the above structure, in the docking device of the present embodiment, when the second joint 2 is docked with the accessory quick connector, the control valve 7 may be set to be located at the middle position, the switching valve 42 is located at the first working position, the core of the accessory quick connector may push the hydraulic oil in the second joint 2 to drain to the oil tank 5 through the oil drainage oil path 3 and the first working oil path 11, and the accessory quick connector may be easily docked with the second joint 2; after the docking is completed, the switching valve 42 is set to be in the second working position, and the control valve 7 is reversed to supply oil to the corresponding accessory.

The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.