Hydraulic rotary oil path quick change device and control method thereof

Abstract

The present application relates to a kind of hydraulic rotary oil path quick-change device and its control method.A kind of hydraulic rotary oil path quick-change device, including the linkage part for being connected with the excavator accessory, it is special in that, it further includes the rotary part for being connected with the excavator arm, connecting rod, rotary part and linkage part between the main part being arranged;The rotary part includes adapter seat, and the plate surface of the adapter seat bottom plate of adapter seat is fixedly installed rotary mechanism;The inner ring and outer ring of rotary mechanism are relatively rotated by hydraulic rotary motor;The top of main part is equipped with oil distributor, and the lower part of main part is equipped with hydraulic integrated switch, and there is oil path link between oil distributor and hydraulic integrated switch;Hydraulic integrated switch is provided with quick plug female connector;Quick plug male connector is provided on linkage part;Quick plug female connector is used for being connected with quick plug male connector.Simultaneously the control method of the above device is also provided.

Description

TECHNICAL FIELD

[0001] The present application relates to a hydraulic rotary oil circuit quick-change device and a control method thereof, and belongs to the technical field of conversion docking devices for excavators. BACKGROUND

[0002] In engineering, excavators need to replace different accessories (such as breaking hammers, plum blossom grab buckets, hydraulic shears, and other accessories) to meet different working conditions. The traditional method of replacing accessories is to directly remove the pin shafts connected to the accessories on the excavator boom and rocker, and then reinstall the pin shafts after replacing the accessories. This replacement method requires multiple operators to work together to complete the replacement of the accessories, which is time-consuming and labor-intensive. Moreover, the engineering site is often in a harsh environment with serious dust pollution, and the traditional replacement method can easily cause small particles to enter the position where the accessory is connected to the main machine, leading to poor lubrication and ultimately affecting the service life of the machine. To solve the above problems, technicians in the field are researching a quick-change device, also known as a conversion platform, which is a connecting device added between the excavator boom and the connecting rod. The excavator can quickly attach and detach accessories with different functions through it, allowing the excavator to achieve "one machine, multiple uses, and one machine, multiple capabilities." However, the existing quick-change device does not have a rotating function, and the angle of the excavator needs to be constantly adjusted to complete the docking with the accessory, which is not flexible and time-consuming. SUMMARY

[0003] The present application provides a hydraulic rotary oil circuit quick-change device and a control method thereof to address the inflexible connection process between the accessory and the excavator of the existing quick-change device.

[0004] The technical solution to solve the above technical problems is as follows: a hydraulic rotary oil circuit quick-change device, including a linking part for connecting with the excavator accessory, characterized in that it further includes a rotating part for docking with the excavator arm and connecting rod, a main part is provided between the rotating part and the linking part, the main part is fixedly connected with the rotating part, and the main part and the linking part are combined and installed in a detachable manner by splicing; the rotating part includes an adapter seat, a rotary reducer is fixedly installed on the plate surface of the adapter seat bottom plate; the inner and outer circles of the rotary reducer are relatively rotated by a hydraulic rotary motor; a oil distributor is installed on the top of the main part, a hydraulic integrated switch is installed on the lower part of the main part, and an oil circuit is linked between the oil distributor and the hydraulic integrated switch; a quick plug female connector is provided on the hydraulic integrated switch; a quick plug male connector is provided on the linking part; the quick plug female connector is used for docking with the quick plug male connector. The other end of the rotary reducer is fixedly installed on the main body connecting plate of the main part by bolts.

[0005] On the basis of the above technical solution, the present application can also make improvements to the above technical solution to achieve ease of use and stability of the equipment:

[0006] Further, a motor control valve block is fixedly installed at the oil port of the hydraulic rotary motor.

[0007] Further, a pair of parallel adapter seat upright plates are arranged on the adapter seat bottom plate, and a pair of housing fixing pins are installed on the adapter seat upright plates.

[0008] Further, in any one of the above schemes, the hydraulic rotary oil way quick change device, the main body part comprises a main body, the main body comprises a main body connecting plate for fixed connection with the rotary reducer and a pair of switcher mounting side plates for mounting the hydraulic integrated switcher, the switcher mounting side plates are connected through main body side plates between the main body connecting plate, the front end of the switcher mounting side plate is provided with a locking pin mounting plate, the locking pin mounting plate is provided with a locking pin hole, the locking pin mounting plate is perpendicular to the switcher mounting side plate, the rear end of the switcher mounting side plate is provided with a connecting bayonet, and the side surface of the switcher mounting side plate is provided with a limiting shaft B; the hydraulic integrated switcher is mounted between the two switcher mounting side plates.

[0009] Further, the main body side plates are provided with openings, and the two ends of the two main body side plates are connected through main body sealing plates, and the two main body side plates and the two main body sealing plates form a square box structure.

[0010] Further, the hydraulic integrated switcher comprises a valve body A, the valve body A is composed of a cylinder barrel on both sides and an assembly mounting plate between the two cylinder barrels, and the assembly mounting plate has a convex structure; one end of the cylinder barrel is provided with an end cover with a center hole, the other end of the cylinder barrel is provided with a locking pin shaft, the locking pin shaft is provided with a connecting cover fixed with the cylinder barrel, a piston rod is installed in the cylinder barrel, the piston rod extends out of the end of the end cover and is fixedly installed with a limiting block, and the limiting block is fixed on the piston rod through a limiting pin; a hydraulic control check valve is installed on the convex part of the assembly mounting plate, and a quick plug female connector is installed on the assembly mounting plate.

[0011] Further, the main body connecting plate is provided with a center hole, and the adapter seat bottom plate is also provided with a center hole; a oil distributor is installed at the center hole of the main body connecting plate, the oil distributor penetrates the rotary reducer and the adapter seat bottom plate and is located at the center position; an end of an oil distributor core body of the oil distributor is provided with a limiting plate, and the limiting plate is fixedly connected with the adapter seat bottom plate.

[0012] Further, the adapter seat bottom plate is provided with a pin hole on the extension segment outside the adapter seat upright plate, the main body connecting plate is provided with a pin hole corresponding to the pin hole on the adapter seat upright plate, and a limiting shaft A is inserted and installed in the pin holes on the adapter seat bottom plate and the main body connecting plate; an end of the limiting shaft A is provided with a D-shaped locking pin.

[0013] Further, the linking part comprises a linking seat composed of a linking seat bottom plate and a pair of linking seat vertical plates on the linking seat bottom plate, a valve body B is arranged on the linking seat bottom plate, a quick plug male connector is arranged on the valve body B, and a linking seat clamping groove for butt joint is arranged on the linking seat vertical plate; a pair of welding pin shafts are arranged on the two linking seat vertical plates, and a butt joint positioning pin is further arranged on the valve body B.

[0014] A control method of a hydraulic rotary oil path quick change device, which is characterized in that, when a excavator and an accessory are butt jointed, the rotary adapter seat is first connected with the excavator small arm and the connecting rod by the shell pin shaft, and the linking seat is installed on the accessory; during operation, the main body is close to the linking seat, the connecting clamping groove on the switcher installation side plate first holds one welding pin shaft of the linking seat, the angle of the excavator small arm is adjusted, the main body bottom is kept horizontal with the linking seat, the hydraulic oil drives the hydraulic integrated switcher piston rod to extend and retract to realize structure locking and oil path connection at the same time, and the specific working state is as follows:

[0015] 1) butt joint process: the hydraulic oil supplied by the main pump enters the hydraulic integrated switcher rodless cavity through the hydraulic control check valve, drives the piston rod to move from the high pressure cavity to the low pressure cavity, the piston rod extends, the hydraulic integrated switcher locking pin shaft and the valve body B are simultaneously pushed forward, the locking pin shaft locks the welding pin shaft on the linking seat, the mechanical butt joint is completed, the valve body A moves forward and is butt jointed with the linking seat valve body B, the oil path connection is realized, the hydraulic oil in the cavity with rod returns to the oil tank, and the machine and hydraulic integrated switch is completed;

[0016] 2) separation process: the hydraulic oil supplied by the main pump enters the hydraulic integrated switcher cavity with rod, the hydraulic control check valve is connected through the reverse oil path at the same time, the piston rod is driven to move from the high pressure cavity to the low pressure cavity, the piston rod is retracted, the locking pin shaft of the hydraulic integrated switcher and the valve body A are retracted, the locking pin shaft is separated from the welding pin shaft, the valve body A is separated from the linking seat valve block B, and the hydraulic oil in the rodless cavity returns to the oil tank through the hydraulic control check valve, and the machine and hydraulic joint is interrupted;

[0017] 3) forward rotation process: the hydraulic oil supplied by the main pump enters the hydraulic rotary motor through the motor control valve block, the pilot is opened at the same time, the hydraulic rotary motor is driven to rotate, the low pressure oil in the hydraulic rotary motor returns to the oil tank through the motor control valve block, and the forward rotation is completed;

[0018] 4) reverse rotation process: the hydraulic oil supplied by the main pump enters the hydraulic rotary motor through the motor control valve block, the pilot is opened at the same time, the hydraulic rotary motor is driven to rotate, the low pressure oil in the hydraulic rotary motor returns to the oil tank through the motor control valve block, and the reverse rotation is completed.

[0019] The hydraulic rotary oil path quick change device of the present application has the advantages of solving the problems of time-consuming and laborious replacement, low operation efficiency, high failure rate and complex installation pipeline of existing quick change devices, and realizing quick replacement of tools and docking of pipelines within 2-4 seconds without manual operation. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective structural schematic diagram of the hydraulic rotary oil path quick change device of the present application;

[0021] Figure 2 It is a structural schematic diagram of the rotary part;

[0022] Figure 3 It is a perspective structural schematic diagram of the main part;

[0023] Figure 4 It is a perspective structural schematic diagram of the main part;

[0024] Figure 5 It is a perspective structural schematic diagram of the hydraulic integrated switch;

[0025] Figure 6 It is a perspective structural schematic diagram of the valve body A;

[0026] Figure 7 It is a perspective structural schematic diagram of the linking part;

[0027] Figure 8 It is a perspective structural schematic diagram of the linking seat;

[0028] Figure 9 It is a perspective structural schematic diagram of the adapter seat;

[0029] Figure 10 It is a state schematic diagram when the limiting shaft realizes the limiting function;

[0030] Figure 11 It is a state schematic diagram when the limiting shaft cancels the limiting function;

[0031] Figure 12 It is an installation structural schematic diagram of the oil distributor;

[0032] Figure 13 It is a schematic diagram of the oil path quick change docking process;

[0033] Figure 14 It is a hydraulic principle diagram;

[0034] Figure 15 It is a schematic diagram of the docking process principle;

[0035] Figure 16 It is a schematic diagram of the disengagement process principle;

[0036] Figure 17 It is a schematic diagram of the rotation process principle;

[0037] Figure 18 The rotating process principle is shown in the schematic diagram.

[0038] The reference signs are recorded as follows: 1-rotary part, 2-main body part, 3-connection part, 4-adaptor, 4.1-adaptor bottom plate, 4.2-adaptor vertical plate, 5-housing pin shaft, 6-rotary reducer, 7-rotary motor, 8-motor control valve block, 9-limiting shaft A, 10-D-shaped locking pin, 11-oil distributor, 12-limiting plate, 13-main body, 13.1-main body connecting plate, 13.2-switch mounting plate, 13.3-main body side plate, 13.4-main body sealing plate, 13.5-locking pin mounting plate, 13.6-connection bayonet, 14-opening plate pin, 15-hydraulic integrated switch, 15.1-valve body A, 15.1.1-cylinder barrel, 15.1.2-assembly mounting plate, 15.2-locking pin shaft, 15.2.1-connection cover, 15.3-end cover, 15.4-piston rod, 15.5-limiting block, 15.6-limiting pin, 15.7-hydraulic control one-way valve, 15.8-quick insertion female connector, 16-dustproof plate, 17-limiting shaft B, 18-link seat, 18.1-link seat bottom plate, 18.2-link seat vertical plate, 18.3-link seat clamping groove, 19-welding pin shaft, 20-valve body B, 21-quick insertion male connector. DETAILED DESCRIPTION

[0039] The principles and features of the present application are described below in conjunction with the accompanying drawings, and the examples are only used to explain the present application and are not used to limit the scope of the present application.

[0040] A hydraulic rotary oil path quick change device, in combination with the accompanying drawings Figures 1 to 13The structure of the device is described as follows: the quick-change device of the application comprises a linking part 3 for connecting with the excavator accessory, a rotating part 1 for connecting with the excavator arm and connecting rod, a main part 2 arranged between the rotating part 1 and the linking part 3, the main part 2 being fixedly connected with the rotating part 1 and being detachably combined with the linking part 3 in a splicing manner; the rotating part 1 comprises an adapter seat 4, a rotating speed reducer 6 being fixedly installed on the plate surface of an adapter seat bottom plate 4.1 of the adapter seat 4, a pair of parallel adapter seat vertical plates 4.2 being arranged on the adapter seat bottom plate 4.1, a pair of housing fixing pins 5 being installed on the adapter seat vertical plates 4.2, the adapter seat vertical plates 4.2 being located on both sides of the adapter seat bottom plate, the adapter seat bottom plate 4.1 being provided with a center hole; the inner ring and the outer ring of the rotating speed reducer 6 are relatively rotated through a hydraulic rotating motor 7, a motor control valve block 8 being fixedly installed at the oil port of the hydraulic rotating motor 7, the inner ring 6 of the rotating speed reducer being fixed to the lower end of the adapter seat 4 by means of bolts, the rotating speed reducer adopting a single-row four-point contact ball structure, being of an external tooth type, being compact in structure and light in weight, being capable of simultaneously bearing axial force, radial force and tilting moment, the hydraulic rotating motor 7 being a low-speed and large-torque motor, being stable in operation, being capable of realizing 360° unrestricted free rotation of the oil circuit through the use of spline connection and the gear ring of the rotating speed reducer 6, the connection mode having a large contact area, being capable of bearing a large load and being high in strength, the motor being fixed to one side of the housing of the rotating speed reducer 6 by means of bolts; the motor control valve block 8 is provided with double balance valves, the structure being capable of realizing hydraulic braking of the motor when the oil circuit is interrupted, being safe and stable, avoiding personal injury caused by inertial rotation of the accessory; a oil distributor 11 is installed on the top of the main part 2, a hydraulic integrated switch 15 is installed on the lower part of the main part 2, and the oil distributor 11 and the hydraulic integrated switch 15 are linked by an oil circuit; the hydraulic integrated switch 15 is provided with a quick-plug female connector 15.8; the linking part 3 is provided with a quick-plug male connector 21; the quick-plug female connector 15.8 is used for connecting with the quick-plug male connector 21.

[0041] On the basis of the above-mentioned embodiments, the following structural improvements are made:

[0042] The main body part 2 comprises a main body 13, the main body 13 comprises a main body connecting plate 13.1 for fixed connection with the slewing reducer 6 and a pair of switcher mounting side plates 13.2 for mounting the hydraulic integrated switcher 15, the main body connecting plate 13.1 is provided with a middle hole, the switcher mounting side plates 13.2 are connected with the main body connecting plate 13.1 through a main body side plate 13.3, the front end of the switcher mounting side plate 13.2 is provided with a locking pin mounting plate 13.5, the locking pin mounting plate 13.5 is provided with a locking pin hole, the locking pin mounting plate 13.5 is perpendicular to the switcher mounting side plate 13.2, the rear end of the switcher mounting side plate 13.2 is provided with a connecting bayonet 13.6, and the side surface of the switcher mounting side plate 13.2 is provided with a limiting shaft B17; the hydraulic integrated switcher 15 is mounted between the two switcher mounting side plates 13.2; in order to improve the strength of the overall structure, the two ends of the two main body side plates 13.3 are connected through a main body sealing plate 13.4, and the two main body side plates 13.3 and the two main body sealing plates 13.4 form a four-square box structure, meanwhile, in order to facilitate the fixing of the bolts and nuts of the oil distributor and other components, the main body side plate 13.3 and the main body sealing plate are provided with openings; the oil distributor 11 is mounted at the middle hole of the main body connecting plate 13.1, the oil distributor 11 penetrates the slewing reducer 6 and the adapter seat bottom plate 4.1 and is located at the center position; the end of the oil distributor core of the oil distributor 11 is provided with a limiting plate 12, the limiting plate 12 is fixedly connected with the adapter seat bottom plate 4.1; the limiting plate 12 limits the rotation of the oil distributor core, and the lower end of the oil distributor body is fixed to the upper end of the main body 13 of the main body part 2 through a bolt, when the oil way quick change rotates, the oil distributor core is fixed, the oil distributor body rotates together with the main body part and the parts below, this structure can keep the pipeline in place during the slewing process, avoid the phenomenon of winding pipe, and is beneficial to the stability of the oil way; the limiting plate 12 is mounted on the bottom plate of the adapter seat 4 and located inside the bottom plate;

[0043] The hydraulic integrated switch 15 comprises a valve body A 15.1, which is composed of two cylinder barrels 15.1.1 on both sides and an assembly mounting plate 15.1.2 between the two cylinder barrels 15.1.1, the assembly mounting plate 15.1.2 being in a convex structure; one end of the cylinder barrel 15.1.1 is provided with an end cover 15.3 with a middle hole, and the other end of the cylinder barrel 15.1.1 is provided with a locking pin shaft 15.2 with a connecting cover 15.2.1 fixed with the cylinder barrel 15.1.1; a piston rod 15.4 is installed in the cylinder barrel 15.1.1, the piston rod 15.4 extends out of the end of the end cover 15.3 and is fixedly installed with a limiting block 15.5, the limiting block 15.5 is fixed on the piston rod 15.4 through a limiting pin 15.6; a hydraulic control check valve 15.7 is installed on the convex part of the assembly mounting plate 15.1.2, and a quick plug female connector 15.8 is installed on the assembly mounting plate 15.1.2; the valve body A 15.1, the locking pin shaft 15.2, the end cover 15.3 and the piston rod 15.4 are sealed by relying on sealing elements, and during operation, the oil circuit is connected and mechanically locked by controlling the in and out of the rod cavity and the rodless cavity of the hydraulic integrated switch; the limiting block 15.5 is installed at the end of the piston rod 15.4 through the limiting pin 15.6 and a snap spring, and is welded to the inner side end face of the main body 13, which plays a role of fixed support for the hydraulic integrated switch; the hydraulic control check valve 15.7 is installed on the valve body A 15.1, when the high-pressure oil entering the rodless cavity of the hydraulic integrated switch is suddenly interrupted, the rodless cavity hydraulic oil cannot return to the oil tank through the hydraulic control check valve 15.7 due to the unopened pilot pressure, the locking pin shaft is still in the locked state, and the oil circuit is still in the connected state, which can prevent the locking pin shaft from being recovered and the oil circuit from being cut off to cause the tool to fall off and cause a safety accident; the quick plug female connector 15.8 is fixed at the corresponding shaft hole of the valve body A 15.1, and the quick plug female connector 15.8 is connected with the corresponding male connector to complete the connection, realize the switching of the oil circuit and the circuit;

[0044] Further, the extension section of the adapter base plate 4.1 outside the adapter vertical plate 4.2 is provided with a pin hole, the main body connecting plate 13.1 is provided with a pin hole corresponding to the pin hole on the adapter vertical plate 4.2, and the limiting shaft A 9 is inserted into the pin holes on the adapter base plate 4.1 and the main body connecting plate 13.1; the end of the limiting shaft A 9 is provided with a D-shaped lock pin 10; the limiting shaft A 9 penetrates the adapter 4 base plate shaft hole and the main body 13 connecting plate 13.1 shaft hole, and the upper end is embedded in the welding sleeve of the adapter 4; by adjusting the installation angle of the flat table, the depth of embedding in the welding sleeve can be changed; when the flat table is embedded in the deep groove of the welding sleeve, the limiting shaft A 9 will pass through the main body 13 connecting plate 13.1 shaft hole; at this time, the D-shaped lock pin 10 is inserted into the pin hole below the limiting shaft A 9 and locked, so that the limiting is realized; if the flat table is rotated by 90° and lifted up, the flat table is embedded in the shallow groove of the welding sleeve, the limiting shaft A 9 will not pass through the main body 13 connecting plate 13.1 shaft hole, and the limiting is cancelled; at this time, the D-shaped lock pin 10 is inserted into the pin hole above the limiting shaft A 9 and locked, which can prevent the limiting shaft from running out during operation or transportation; this structure not only realizes the limiting, but also facilitates the storage and use of the limiting shaft;

[0045] Further, the linking part 3 includes a linking seat 18, which is composed of a linking seat base plate 18.1 and a pair of linking seat vertical plates 18.2 on the linking seat base plate 18.1; a valve body B 20 is arranged on the linking seat base plate 18.1, a quick plug male connector 21 is arranged on the valve body B 20, and a linking seat clamping groove 18.3 for butt joint is arranged on the linking seat vertical plate 18.2; a pair of welding pin shafts 19 are arranged on the two linking seat vertical plates 18.2, and a butt joint positioning pin 22 is further arranged on the valve body B 20; the welding pin shaft 19 is welded on the linking seat 18 for mechanical connection; the valve body B 20 is fixed in the linking seat 18 by bolts; the butt joint positioning pin 22 is cold-mounted on the valve body B 20, which plays a positioning and guiding role; during the butt joint process of the valve body A 15.1 and the valve body B 20 in the main body part 2, the butt joint positioning pin 22 is first butt jointed with the corresponding pin hole on the valve body A 15.1 to ensure the accuracy of the position, and then the oil way is butt jointed; the quick plug male connector 21 is fixed on the corresponding shaft hole of the valve body B 20, and the corresponding female connector is butt jointed to realize the switching of the oil way.

[0046] For the hydraulic rotary oil way quick change device in the above embodiment, combined with the attached Figures 14-18The application also provides a corresponding control method. Before the excavator is connected with the accessory, the adapter 4 is first connected with the excavator arm and connecting rod by the shell pin shaft 5, and the linking seat 18 is installed on the accessory; during operation, the main body 13 is close to the linking seat 18, the connecting bayonet 13.6 on the switch installation side plate 13.2 first clamps the welded pin shaft 19 of the linking seat 18, the angle of the excavator arm is adjusted, the bottom of the main body 13 is kept horizontal with the linking seat 18, the hydraulic oil drives the piston rod 15.4 of the hydraulic integrated switch 15 to extend and retract, so as to realize the structure locking and oil connection at the same time, and the specific working state is as follows:

[0047] 1) Connection process: the hydraulic oil supplied by the main pump enters the rodless cavity of the hydraulic integrated switch 15.1 through the hydraulic control check valve 15.7, drives the piston rod 15.4 to move from the high-pressure cavity to the low-pressure cavity, the piston rod 15.4 extends, the locking pin shaft 15.2 and the valve body B 20 of the hydraulic integrated switch are simultaneously pushed forward, the locking pin shaft 15.2 locks the welded pin shaft 19 on the linking seat 18, the mechanical connection is completed, the valve body A 15.1 moves forward and is connected with the valve body B 20 of the linking seat 18, the oil connection is realized, at the same time, the hydraulic oil in the cavity with the rod returns to the oil tank, the machine and liquid integrated switch is completed; at the same time, if the hydraulic oil is suddenly interrupted, because the pilot pressure is not opened, the hydraulic oil in the rodless cavity cannot return to the oil tank through the hydraulic control check valve, the locking pin shaft remains in the locked state, and the oil connection remains in the connected state, which provides safety protection for the accessory operation;

[0048] 2) Disconnection process: the hydraulic oil supplied by the main pump enters the cavity with the rod of the hydraulic integrated switch 15, at the same time, the reverse oil connection of the hydraulic control check valve is connected, the piston rod 15.4 is driven to move from the high-pressure cavity to the low-pressure cavity, the piston rod 15.4 is retracted, the locking pin shaft 15.2 and the valve body A 15.1 of the hydraulic integrated switch 15 are retracted, the locking pin shaft 15.2 is separated from the welded pin shaft 19, the valve body A 15.1 is separated from the valve block B 20 of the linking seat, at the same time, the hydraulic oil in the rodless cavity returns to the oil tank through the hydraulic control check valve 15.7, and the machine and liquid connection is interrupted;

[0049] 3) Forward rotation process: the hydraulic oil supplied by the main pump enters the hydraulic rotary motor 7 through the motor control valve block 8, at the same time, the pilot is opened, the hydraulic rotary motor 7 is driven to rotate, the low-pressure oil in the hydraulic rotary motor 7 returns to the oil tank through the motor control valve block 8, and the forward rotation is completed; during the process, the hydraulic oil supplied by the main pump is suddenly interrupted, because the pilot pressure is not opened, the circuit is interrupted, the motor realizes hydraulic braking, and personal injury caused by the inertia rotation of the accessory is avoided;

[0050] 4) Reverse process: hydraulic oil supplied by the main pump enters the hydraulic rotary motor 7 through the motor control valve block 8, and the pilot is opened at the same time, driving the hydraulic rotary motor 7 to rotate, and the low-pressure oil in the hydraulic rotary motor 7 returns to the oil tank through the motor control valve block 8, completing the reverse action; if the high-pressure oil supplied by the main pump is suddenly interrupted during this process, the pilot pressure is not opened, the circuit is interrupted, and the motor realizes hydraulic braking, avoiding personal injury caused by the inertia rotation of the tool.

[0051] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydraulic swing-type circuit changer comprising a link part (3) for connection with a shovel attachment, characterized in that, Also include a slewing part (1) for connecting with the excavator arm, connecting rod, the main part (2) is arranged between the slewing part (1) and the link part (3), the main part (2) is fixedly connected with the slewing part (1), and the main part (2) is combined and installed in a detachable manner with the link part (3); The slewing part (1) comprises an adapter seat (4), a slewing reducer (6) is fixedly installed on the plate surface of the adapter seat bottom plate (4.1) of the adapter seat (4); The inner ring and the outer ring of the slewing reducer (6) are relatively rotated by a hydraulic slewing motor (7), and a motor control valve block (8) is fixedly installed at the oil port of the hydraulic slewing motor (7); The main part (2) comprises a main body (13), the main body (13) comprises a main body connecting plate (13.1) for fixedly connecting with the slewing reducer (6) and a pair of switcher mounting side plates (13.2) for mounting a hydraulic integrated switch (15), and the rear end of the switcher mounting side plate (13.2) is provided with a connecting bayonet (13.6); An oil distributor (11) is installed on the top of the main part (2), a hydraulic integrated switch (15) is installed on the lower part of the main part (2), and the oil distributor (11) and the hydraulic integrated switch (15) are connected by an oil channel; A quick plug female connector (15.8) is arranged on the hydraulic integrated switch (15); The hydraulic integrated switch (15) comprises a valve body A (15.1), the valve body A (15.1) is composed of two cylinder barrels (15.1.1) on the two sides and an assembly mounting plate (15.1.2) between the two cylinder barrels (15.1.1), and the assembly mounting plate (15.1.2) is in a convex structure; One end of the cylinder barrel (15.1.1) is provided with a center hole end cover (15.3), the other end of the cylinder barrel (15.1.1) is provided with a locking pin shaft (15.2), the locking pin shaft (15.2) is provided with a connecting cover (15.2.1) fixedly connected with the cylinder barrel (15.1.1), a piston rod (15.4) is installed in the cylinder barrel (15.1.1), and the end of the piston rod (15.4) extending out of the end cover (15.3) is fixedly installed with a limiting block (15.5); The protruding part of the assembly mounting plate (15.1.2) is provided with a hydraulic control check valve (15.7), and the assembly mounting plate (15.1.2) is provided with a quick plug female connector (15.8); The link part (3) is provided with a quick plug male connector (21); The quick plug female connector (15.8) is used for connecting with the quick plug male connector (21); The link part (3) comprises a link seat (18), the link seat (18) is composed of a link seat bottom plate (18.1) and a pair of link seat vertical plates (18.2) on the link seat bottom plate (18.1), a valve body B (20) is arranged on the link seat bottom plate (18.1), the quick plug male connector (21) is installed on the valve body B (20), and the link seat vertical plate (18.2) is provided with a link seat clamping groove (18.3) for connection; A pair of welding pin shafts (19) are arranged on the two link seat vertical plates (18.2); When the excavator is connected with the tool, first, the adapter (4) is connected with the excavator arm and connecting rod by the shell pin shaft (5), and the linking seat (18) is installed on the tool; during operation, the main body (13) is close to the linking seat (18), the connecting bayonet (13.6) on the switch installation side plate (13.2) first holds the welded pin shaft (19) of the linking seat (18), the angle of the excavator arm is adjusted, the bottom of the main body (13) is kept horizontal with the linking seat (18), the hydraulic oil drives the piston rod (15.4) of the hydraulic integrated switch (15) to realize the structure locking and the oil circuit connection at the same time, and the specific working state is as follows: 1) The connecting process: the hydraulic oil supplied by the main pump enters the rodless cavity of the hydraulic integrated switch (15) through the hydraulic control check valve (15.7), drives the piston rod (15.4) to move from the high-pressure cavity to the low-pressure cavity, the piston rod (15.4) is extended, the locking pin shaft (15.2) of the hydraulic integrated switch and the valve body B (20) are pushed forward at the same time, the locking pin shaft (15.2) locks the welded pin shaft (19) on the linking seat (18), the mechanical connection is completed, the valve body A (15.1) moves forward and is connected with the valve body B (20) of the linking seat (18), the oil circuit connection is realized, at the same time, the hydraulic oil in the rod cavity returns to the oil tank, the machine and the liquid integrated switch is completed; at the same time, if the hydraulic oil is suddenly interrupted, because the pilot pressure is not opened, the hydraulic oil in the rodless cavity cannot return to the oil tank through the hydraulic control check valve, the locking pin shaft remains locked, and the oil circuit remains connected; 2) The disconnecting process: the hydraulic oil supplied by the main pump enters the rod cavity of the hydraulic integrated switch (15), at the same time, the reverse oil circuit of the hydraulic control check valve is connected, the piston rod (15.4) is driven to move from the high-pressure cavity to the low-pressure cavity, the piston rod (15.4) is retracted, the locking pin shaft (15.2) of the hydraulic integrated switch (15) and the valve body A (15.1) are retracted, the locking pin shaft (15.2) is separated from the welded pin shaft (19), the valve body A (15.1) is separated from the valve body B (20) of the linking seat, at the same time, the hydraulic oil in the rodless cavity returns to the oil tank through the hydraulic control check valve (15.7), and the machine and the liquid connection is interrupted; 3) The forward rotation process: the hydraulic oil supplied by the main pump enters the hydraulic rotary motor (7) through the motor control valve block (8), at the same time, the pilot is opened, the hydraulic rotary motor (7) is driven to rotate, the low-pressure oil in the hydraulic rotary motor (7) returns to the oil tank through the motor control valve block (8), and the forward rotation is completed; 4) The reverse rotation process: the hydraulic oil supplied by the main pump enters the hydraulic rotary motor (7) through the motor control valve block (8), at the same time, the pilot is opened, the hydraulic rotary motor (7) is driven to rotate, the low-pressure oil in the hydraulic rotary motor (7) returns to the oil tank through the motor control valve block (8), and the reverse rotation is completed.

2. The hydraulic rotary manifold quick change device of claim 1, wherein, A pair of parallel adapter vertical plates (4.2) are arranged on the adapter bottom plate (4.1), and a pair of shell pin shafts (5) are installed on the adapter vertical plates (4.2).

3. The hydraulic rotary oil passage quick changer according to any one of claims 1 to 2, characterized by The switch mounting side plate (13.2) is connected with the main body connecting plate (13.1) through the main body side plate (13.3), the front end of the switch mounting side plate (13.2) is provided with a locking pin mounting plate (13.5), the locking pin mounting plate (13.5) is provided with a locking pin hole, the locking pin mounting plate (13.5) is perpendicular to the switch mounting side plate (13.2), the side surface of the switch mounting side plate (13.2) is provided with a limiting shaft B (17); the hydraulic integrated switch (15) is mounted between the two switch mounting side plates (13.2).

4. The hydraulic rotary manifold quick change device of claim 3, wherein, The main body side plate (13.3) is provided with an opening, the two ends of the two main body side plates (13.3) are connected through the main body sealing plate (13.4), and the two main body side plates (13.3) and the two main body sealing plates (13.4) form a four-square box structure.

5. The hydraulic rotary manifold quick change device of claim 3, wherein, The main body connecting plate (13.1) is provided with a middle hole, and the adapter seat bottom plate (4.1) is also provided with a middle hole; the oil distributor (11) is mounted at the middle hole of the main body connecting plate (13.1), the oil distributor (11) penetrates the rotary reducer (6) and the adapter seat bottom plate (4.1) and is located at the center position; the end of the oil distributor core of the oil distributor (11) is provided with a limiting plate (12), and the limiting plate (12) is fixedly connected with the adapter seat bottom plate (4.1).

6. The hydraulic rotary manifold quick change device of claim 3, wherein, The adapter seat bottom plate (4.1) is located on the extension section outside the adapter seat vertical plate (4.2) and is provided with a pin hole, the main body connecting plate (13.1) is provided with a pin hole corresponding to the pin hole on the adapter seat vertical plate (4.2), and the limiting shaft A (9) is inserted into the pin holes on the adapter seat bottom plate (4.1) and the main body connecting plate (13.1); the end of the limiting shaft A (9) is provided with a D-shaped locking pin (10).

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