Quick-change connector integrated with internal oil way

Abstract

The utility model provides a quick-change connector integrated with an internal oil way, and belongs to the technical field of excavator quick-change connectors, the quick-change connector comprises an upper main body, a swing oil cylinder and a lower main body, the swing oil cylinder is provided with a machine shell and first rotating ends located at the two ends of the machine shell, and the lower main body is connected with the first rotating ends through a first connecting plate. The lower main body is provided with a driving oil cylinder so as to drive the fixed calipers and the movable calipers to be close to and away from each other. A port integrated block is installed at the top of the swing oil cylinder and provided with a driving cylinder port, internal oil ways which are sequentially communicated are arranged in the swing oil cylinder and the first connecting plate, and the driving cylinder port is communicated with the driving oil cylinder through the internal oil ways. Due to the arrangement of the internal oil way, communication with the driving oil cylinder can be achieved without an external oil way channel, the external oil way only needs to be in butt joint with a driving cylinder port in the port manifold block so that control over the driving oil cylinder can be achieved, the swing oil cylinder and the bottom of the swing oil cylinder are not provided with external hoses, pipeline abrasion is avoided, and oil leakage is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of quick-change connectors of excavators, and more particularly relates to a quick-change connector integrated with an internal oil circuit. BACKGROUND

[0002] The quick-change connector of an excavator is a component for connecting the front end of the arm of the excavator and the bucket, achieving quick replacement. In addition to the bucket, it can also be connected to a ripper, a breaking hammer, a hydraulic shear and other attachments. The quick-change connector of the excavator generally has two clamps with openings arranged opposite to each other, and the clamps are driven by a drive cylinder to hook two connecting shafts on the attachment, achieving the connection of the attachment. At the same time, the attachment is rotated through a swing cylinder.

[0003] In the existing quick connection, the oil pipes used by the drive cylinder and the swing cylinder are exposed hoses. Since the drive cylinder is located at the bottom of the swing cylinder, part of the hose needs to be extended to the bottom of the swing cylinder to communicate with the drive cylinder, and the hose is very close to the attachment, which is extremely prone to wear and tear during work. If there is a leakage, it will also cause the attachment to fall off. SUMMARY

[0004] To solve the problems of the prior art, the application provides a quick-change connector integrated with an internal oil circuit, which realizes the disassembly and assembly control operation of the attachment through the integrated internal oil circuit, avoiding the external exposure of the oil circuit.

[0005] To achieve the above purpose, the technical scheme of the application provides a quick-change connector integrated with an internal oil circuit, which comprises an upper body, a swing cylinder and a lower body. The upper body has a connecting shaft, the swing cylinder has a casing and rotating ends one and two located at both ends of the casing, and the top of the lower body has connecting plates one and two fixedly connected with the rotating ends one and two, respectively. The upper body is fixedly connected with the casing, the lower body is provided with a drive cylinder, and the bottom of the lower body is provided with fixed clamps and movable clamps with opposite jaws. The fixed clamps are fixedly connected with the lower body, and the movable clamps are fixedly connected with the output end of the drive cylinder. The top of the swing cylinder is provided with a port integration block, the port integration block has a drive cylinder port, the interior of the swing cylinder and the interior of the connecting plate one have an internal oil circuit in sequence, and the drive cylinder port is in communication with the internal chamber of the drive cylinder through the internal oil circuit.

[0006] The driving cylinder port is integrated on the port integration block for docking the external oil line. The driving oil cylinder is filled and discharged through the driving cylinder port and the internal oil line to realize the extension and retraction of the internal cavity of the driving oil cylinder, so as to control the approach and departure of the fixed caliper and the movable caliper, and realize the disassembly and assembly of the tool. Since the internal oil line is located in the swing oil cylinder and the connecting plate one, and the port integration block for externally connecting the external oil line is located at the top of the swing oil cylinder, the swing oil cylinder and the bottom of the swing oil cylinder are completely free of external pipelines, which greatly avoids the risk of pipeline wear and tear and reduces the risk of oil leakage.

[0007] Optionally, the driving cylinder port comprises a port one and a port two, the driving oil cylinder has a cylinder body fixedly connected with the lower main body, the cylinder body has a cylinder barrel inside, the cylinder barrel has a rod cavity and a rodless cavity, the cylinder body has an oil port one in communication with the rod cavity and an oil port two in communication with the rodless cavity; the swing oil cylinder has a central rotating shaft located inside the casing, a rotating end one is located at the end of the central rotating shaft, the outer side wall of the root of the central rotating shaft is in rotating abutment with the inner side wall of the casing, the casing is provided with an oil port three and an oil port four, an oil groove one and an oil groove two are provided around the outer side wall of the root of the central rotating shaft, the central rotating shaft is provided with an oil channel one and an oil channel two inside together with the rotating end one, the inside of the connecting plate one is provided with an oil channel three and an oil channel four; the port one, the oil port three, the oil groove one, the oil channel one, the oil channel three and the oil port one are sequentially communicated, the port two, the oil port four, the oil groove two, the oil channel two, the oil channel four and the oil port two are sequentially communicated, and the oil port three, the oil groove one, the oil channel one, the oil channel three, the oil port four, the oil groove two, the oil channel two and the oil channel four form an internal oil line.

[0008] The port one and the port two are used for docking the external oil line. Through the above arrangement, the pressurized oil filled and discharged from the port one and the port two can enter and exit the rod cavity and the rodless cavity through the internal oil line, so as to drive the piston in the cylinder barrel to reciprocate, realize the approach and departure of the fixed caliper and the movable caliper, and achieve the disassembly and assembly of the tool. The arrangement of the oil groove one and the oil groove two can collect the hydraulic oil at the oil port three and the oil port four and pass through to the rotating oil channel one and the oil channel two, so as to realize the penetration of the internal oil line between the fixed casing and the rotating central rotating shaft.

[0009] Optionally, the tail end of the cylinder body and the connecting plate one are attached to each other, the end of the oil channel three away from the oil channel one is located on the side wall where the connecting plate one and the cylinder body are attached to each other and directly communicates with the oil port one, and the end of the oil channel four away from the oil channel two is located on the side wall where the connecting plate one and the cylinder body are attached to each other and directly communicates with the oil port two. In this way, the oil channel three and the oil channel four inside the driving oil cylinder and the connecting plate one can be directly connected, and the passage at the docking position is completely not exposed to the outside, avoiding the risk of wear and tear.

[0010] Optionally, the port integration block further integrates a swing cylinder port, the swing cylinder port comprises a port three and a port four, the swing oil cylinder has a cylinder cavity one and a cylinder cavity two inside, the casing has an oil port five and an oil port six, the port three communicates with the cylinder cavity one through the oil port five, and the port four communicates with the cylinder cavity two through the oil port six.

[0011] Port three and port four are used to connect external oil lines. Through the above arrangement, the operation of charging and discharging hydraulic oil in cylinder cavity one and cylinder cavity two can be realized through port three and port four to drive the rotation control of the rotating end one in the swing oil cylinder. At this time, port one, port two, port three and port four are integrated on the port integrated block, the port integration degree is high, the oil pipe connection is convenient, and the device is compact and beautiful.

[0012] Optionally, an overflow valve is further included, and passages one, two, three and four are formed in the port integrated block. Port one is communicated with oil port three through passage one, port two is communicated with oil port four through passage two, port three is communicated with oil port five through passage three, and port four is communicated with oil port six through passage four. Passage three is communicated with the T port of the overflow valve, and passage four is communicated with the P port of the overflow valve. In this way, if the pressure of the swing oil cylinder is too high during the charging and discharging process, the pressure can be released through the overflow valve.

[0013] Optionally, the port integrated block is installed on the top wall of the machine shell. The end of passage one away from port one is located at the bottom wall of the port integrated block and directly communicates with oil port three. The end of passage two away from port two is located at the bottom wall of the port integrated block and directly communicates with oil port four. The end of passage three away from port three is located at the bottom wall of the port integrated block and directly communicates with oil port five. The end of passage four away from port four is located at the bottom wall of the port integrated block and directly communicates with oil port six.

[0014] Optionally, the cylinder body is provided with a valve cavity, a hydraulic control check valve is installed in the valve cavity, the end of the hydraulic control check valve has a pressure oil port, the side wall of the hydraulic control check valve has a working oil port one and a working oil port two, the pressure oil port and the valve cavity form an oil chamber one, the valve cavity and the working oil port one form an oil chamber two, and the valve cavity and the working oil port two form an oil chamber three. Oil port one, oil chamber one and rod cavity are communicated in sequence. Rodless cavity is communicated with working oil port two through oil chamber three. Working oil port one is communicated with oil port two through oil chamber two. When the oil pressure in oil chamber one or the oil pressure at working oil port one is greater than the opening pressure of the hydraulic control check valve, working oil port one and working oil port two are communicated. When the oil pressure in oil chamber one or the oil pressure at working oil port one is less than the opening pressure of the hydraulic control check valve, working oil port one and working oil port two are blocked from each other.

[0015] When the oil line is broken during the use of the excavator, the working oil port one and the working oil port two will be blocked from each other due to the pressure drop, and the hydraulic oil in the rodless cavity cannot be discharged, which ensures that the piston rod cannot be retracted, ensures that the movable caliper cannot move towards the fixed caliper, and avoids the tool from falling off.

[0016] Optionally, the slide rail is further included, the bottom of the lower body is provided with two installation plates in parallel and at intervals, the cylinder is fixedly installed between the two installation plates, the slide rail is installed on the side walls opposite to each other of the two installation plates, the output end of the driving oil cylinder is installed with a sliding block, the movable clamp is fixedly connected with the sliding block and the fixed clamp is slidingly arranged on the slide rail. The slide rail supports and guides the movable clamp, avoids the lateral force applied by the tool to the movable clamp from being applied to the output end of the driving oil cylinder, and ensures the stability of the connection and the service life of the driving oil cylinder.

[0017] Optionally, the connecting shaft has two, the upper body top is provided with two support plates in parallel and at intervals, each support plate is provided with two installation holes, the installation holes on the two support plates are opposite to each other, a plurality of bolt connection holes are uniformly distributed around each installation hole, each installation hole is provided with a connecting disc, a plurality of bolt holes are distributed around the circumference of the connecting disc, the bolt holes and the bolt connection holes are opposite to each other, and the connecting disc and the support plate are bolted, each connecting disc is eccentrically provided with a support hole, and the two ends of the two connecting shafts are respectively fixedly arranged in the support holes opposite to each other. The support hole is eccentrically arranged on the connecting disc, the center distance between the two support holes on each support plate can be adjusted by rotating the connecting disc to different directions and bolted on the support plate, and the adjustment of the center of the two connecting shafts can be realized.

[0018] Optionally, one end of the connecting shaft is fixedly installed with a limiting plate larger than the support hole, the other end of the connecting shaft is sleeved with a shaft sleeve larger than the support hole, the shaft sleeve is provided with a fastening screw, the fastening screw is screwed from the outside through the shaft sleeve and embedded in the connecting shaft, and the limiting plate and the shaft sleeve abut on the side walls opposite to each other of the two connecting discs, respectively. In this way, the limiting plate and the shaft sleeve are clamped on the outside of the two support plates, the axial position of the connecting shaft is fixed, and the wobble of the main shaft is avoided.

[0019] The technical scheme of the present application has the beneficial effects over the prior art, which are as follows:

[0020] The external oil circuit only needs to be connected with the driving cylinder port on the port integrated block, and the driving cylinder port and the internal oil circuit are used to charge and discharge hydraulic oil into the driving oil cylinder, so that the extension and contraction control of the swing oil cylinder is realized, and the disassembly and assembly of the tool are realized. Since the internal oil circuit is located in the interior of the swing oil cylinder and the interior of the connecting plate one, it does not need an external oil circuit channel to communicate with the internal cavity of the driving oil cylinder, and the port integrated block for external connection of the external oil circuit is located at the top of the swing oil cylinder, so that the swing oil cylinder and the bottom of the swing oil cylinder are completely free of external hoses, which greatly avoids the risk of pipeline wear and tear and reduces the risk of oil leakage. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of these drawings.

[0022] Figure 1 The first perspective view of the overall structure of the quick connector integrated with internal oil circuit;

[0023] Figure 2 The schematic view of the port integration block structure;

[0024] Figure 3 The perspective view of the port integration block;

[0025] Figure 4 The perspective view of the port integration block;

[0026] Figure 5 The schematic view of the internal oil circuit of the driving oil cylinder;

[0027] Figure 6 The partial sectional view of the passage communicating with the rod cavity;

[0028] Figure 7 The Figure 6 The partial enlarged view of A in the middle;

[0029] Figure 8 The Figure 6 The partial enlarged view of B in the middle;

[0030] Figure 9 The Figure 6 The partial enlarged view of C in the middle;

[0031] Figure 10 The partial sectional view of the passage communicating with the rod cavity;

[0032] Figure 11 The schematic view of the overall structure of the quick connector integrated with internal oil circuit;

[0033] Figure 12 The Figure 10 The partial enlarged view of D in the middle;

[0034] Figure 13 The Figure 11 The sectional view of A-A in the middle;

[0035] Figure 14 The Figure 13 The partial enlarged view of E in the middle;

[0036] Figure 15 The Figure 11 The sectional view of B-B in the middle;

[0037] Figure 16 For Figure 15 Local enlarged view at F;

[0038] Figure 17 For the swing cylinder and the connection plate one is the overhead joint schematic diagram;

[0039] Figure 18 For Figure 17 Sectional view at C-C;

[0040] Figure 19 For Figure 17 Sectional view at D-D;

[0041] Figure 20 For the drive cylinder internal oil circuit overhead structure schematic diagram;

[0042] Figure 21 For the integrated internal oil circuit quick connector second view overall structure schematic diagram;

[0043] Figure 22 For the upper body structure explosion map.

[0044] Figure: 1, the upper body; 101, connecting shaft; 102, support plate; 103, mounting hole; 104, bolt connection hole; 105, connecting disc; 106, bolt hole; 107, support hole; 108, limit plate; 109, shaft sleeve; 110, fastening screw; 2, swing cylinder; 201, shell; 202, rotating end one; 203, rotating end two; 204, center rotating shaft; 205, oil port three; 206, oil port four; 207, oil tank one; 208, oil tank two; 209, oil way one; 210, oil way two; 211, cylinder cavity one; 212, cylinder cavity two; 213, oil port five; 214, oil port six; 215, dynamic seal; 3, lower body; 301, connecting plate one; 302, connecting plate two; 303, fixed clamp; 304, movable clamp; 305, oil way three; 306, oil way four; 307, slide rail; 308, mounting plate; 309, sliding block; 4, drive cylinder; 401, cylinder body; 402, cylinder barrel; 403, rod cavity; 404, rodless cavity; 405, oil port one; 406, oil port two; 407, valve cavity; 408, hydraulic control one-way valve; 409, pressure oil port; 410, working oil port one; 411, working oil port two; 412, oil cavity one; 413, oil cavity two; 414, oil cavity three; 5, port integrated block; 501, port one; 502, port two; 503, port three; 504, port four; 505, passage one; 506, passage two; 507, passage three; 508, passage four; 6, overflow valve; 7, process hole. DETAILED DESCRIPTION

[0045] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application.

[0046] Embodiment 1

[0047] The present embodiment provides a quick-change connector integrated with an internal oil circuit, based on Figure 1 As shown in the figure, it comprises three parts of an upper body 1, a swing oil cylinder 2 and a lower body 3. The upper body 1 is used to connect with the arm of the excavator, and the lower body 3 is used to connect with the accessory. The upper body 1 has a connecting shaft 101 for connecting with the arm of the excavator. The swing oil cylinder 2 has a casing 201 and a rotating end one 202 and a rotating end two 203 at both ends of the casing 201. The top of the lower body 3 has a connecting plate one 301 and a connecting plate two 302 fixedly connected with the rotating end one 202 and the rotating end two 203 respectively. The upper body 1 is fixedly connected with the casing 201. In this way, the upper body 1 and the lower body 3 can be relatively rotated through the swing oil cylinder 2 to realize the adjustment of the working angle of the accessory. The lower body 3 is provided with a driving oil cylinder 4. The bottom of the lower body 3 is provided with a fixed clamp 303 and a movable clamp 304 with their jaws opposite to each other. The fixed clamp 303 is fixedly connected with the lower body 3, and the movable clamp 304 is fixedly connected with the output end of the driving oil cylinder 4. The movement of the movable clamp 304 driven by the driving oil cylinder 4 can realize the mutual approach and separation between the fixed clamp 303 and the movable clamp 304. The jaws of the fixed clamp 303 and the movable clamp 304 are used to hook the mounting shaft of the accessory. When the fixed clamp 303 and the movable clamp 304 are separated, the accessory can be clamped and fixed, and when the fixed clamp 303 and the movable clamp 304 are close, the accessory can be disassembled.

[0048] The driving oil cylinder 4 needs to be connected with an external oil supply device to realize the charging and discharging of hydraulic oil. Therefore, on the basis of the above structure, a port integration block 5 is installed at the top of the swing oil cylinder 2. The port integration block 5 has a driving cylinder port. The inside of the swing oil cylinder 2 and the inside of the connecting plate one 301 have an internal oil circuit in sequence. The driving cylinder port is in communication with the internal cavity of the driving oil cylinder 4 through the internal oil circuit. In this way, the hydraulic oil can be charged and discharged into the driving oil cylinder 4 along the dashed line path in the figure. Figure 1

[0049] ​In use, the oil supply device fills and discharges the internal cavity of the drive oil cylinder 4 through the drive cylinder port and the internal oil circuit to realize the extension and retraction of the drive oil cylinder 4. Since the internal oil circuit is arranged in the interior of the swing oil cylinder 2 and the interior of the connecting plate 1, and the port integration block 5 for externally connecting the oil supply device is located at the top of the swing oil cylinder 2, the swing oil cylinder 2 and the bottom of the swing oil cylinder 2 are completely free of external hoses, avoiding the risk of hose wear and reducing the risk of oil leakage, so that the entire excavator quick-change joint has high stability and strong practicability.

[0050] In detail, please refer to Figures 2 to 5 , the drive cylinder port includes port one 501 and port two 502, the drive oil cylinder 4 has a cylinder body 401 fixedly connected with the lower main body 3, the cylinder body 401 has a cylinder barrel 402 in the interior, the cylinder barrel 402 has a rod cavity 403 and a rodless cavity 404, and the rod cavity 403 and the rodless cavity 404 are separated by a piston in the interior of the drive oil cylinder 4. The cylinder body 401 has an oil port one 405 in communication with the rod cavity 403 and an oil port two 406 in communication with the rodless cavity 404.

[0051] Please refer to Figures 6 to 16 . Among them Figures 6 to 9 shows a schematic diagram of the internal oil circuit of the port integration block 5 in communication with the oil port one 405, Figures 10 to 16 shows a schematic diagram of the internal oil circuit of the port integration block 5 in communication with the oil port two 406, Figure 8 , Figure 9 , Figure 14 and Figure 16 , the dashed lines in the above figures represent the flow path of hydraulic oil. The swing oil cylinder 2 has a central rotating shaft 204 located in the interior of the machine shell 201, a rotating end one 202 located at the end of the central rotating shaft 204, and a root outer side wall of the central rotating shaft 204 in rotational abutment with the inner side wall of the machine shell 201. The machine shell 201 is provided with an oil port three 205 and an oil port four 206, and an oil groove one 207 and an oil groove two 208 are arranged around the root outer side wall of the central rotating shaft 204. The central rotating shaft 204 is provided with an oil channel one 209 and an oil channel two 210 in the interior together with the rotating end one 202, and the interior of the connecting plate one 301 is provided with an oil channel three 305 and an oil channel four 306. The port one 501, the oil port three 205, the oil groove one 207, the oil channel one 209, the oil channel three 305, and the oil port one 405 are sequentially communicated, the port two 502, the oil port four 206, the oil groove two 208, the oil channel two 210, the oil channel four 306, and the oil port two 406 are sequentially communicated, and the oil port three 205, the oil groove one 207, the oil channel one 209, the oil channel three 305, the oil port four 206, the oil groove two 208, the oil channel two 210, and the oil channel four 306 form the internal oil circuit.

[0052] Port 1 501 and Port 2 502 are used to connect to external oil circuits. With the above configuration, hydraulic oil charged or discharged from Port 1 501 can be used to fill or discharge hydraulic oil in the rod chamber 403 via the sequentially connected Port 1 501, Oil Port 3 205, Oil Slot 1 207, Oil Passage 1 209, Oil Passage 3 305, and Oil Port 1 405. Similarly, hydraulic oil charged or discharged from Port 2 502 can be used to fill or discharge hydraulic oil in the rodless chamber 404 via the sequentially connected Oil Port 4 206, Oil Slot 2 208, Oil Passage 2 210, Oil Passage 4 306, and Oil Port 2 406, thus controlling the extension and retraction motion of the output end in the drive cylinder 4. The two ends of Oil Slot 1 207 and Oil Slot 2 208 are sealed with the inner wall of the housing 201 by a dynamic seal 215. The dynamic seal 215 is existing technology and will not be described further.

[0053] As the central shaft 204 rotates relative to the housing 201, the oil groove 1 207 and oil groove 208 formed on the outer wall of the root of the central shaft 204 can remain in communication with oil port 3 205 and oil port 4 206 respectively during rotation. Figure 7 and Figure 8 As shown, the end of oil passage 209 connects to the bottom wall of oil tank 207. During filling, hydraulic oil entering through port 3 205 collects in oil tank 207 and then enters oil passage 209. During draining, hydraulic oil discharged from oil passage 209 collects in oil tank 207 and then enters port 3 205. Similarly, based on... Figure 12 and Figure 14 As shown, the end of oil passage 210 is connected to the bottom wall of oil tank 208. During filling, the hydraulic oil entering from oil port 4 206 collects in oil tank 208 and then enters oil passage 210. During draining, the hydraulic oil discharged from oil passage 210 collects in oil tank 208 and then enters oil port 4 206. This achieves oil circuit connection between the rotating central shaft 204 and the fixed housing 201. Since connecting plate 301 is fixedly installed on rotating end 202, the ends of oil passage 209 away from oil tank 207 and oil passage 210 away from oil tank 208 are extended from inside the central shaft 204 to rotating end 202 and connected to oil passage 305 and oil passage 4 306 on connecting plate 301 respectively.

[0054] At the same time, based on Figure 9 and Figure 16As shown, the tail end of the cylinder body 401 and the connecting plate 301 are attached to each other, the end of the oil passage 305 away from the oil passage 1 209 is located on the side wall where the connecting plate 301 and the cylinder body 401 are attached to each other and directly interfaces with the oil port 1 405, and the end of the oil passage 4 306 away from the oil passage 2 210 is located on the side wall where the connecting plate 301 and the cylinder body 401 are attached to each other and directly interfaces with the oil port 2 406, which realizes the communication of the oil passage 3 305 and the oil passage 4 306 on the connecting plate 301 with the cylinder cavity and the rod cavity 404 in the driving oil cylinder 4, and the driving oil cylinder 4 and the oil passage 3 305 and the oil passage 4 306 inside the connecting plate 301 can be directly connected and the passage at the interface is completely not exposed to the outside, which is compact in structure and avoids the risk of wear.

[0055] Further, based on Figures 2 to 4 , and Figures 17 to 19 As shown, the port integration block 5 also integrates swing cylinder ports, which include port 3 503 and port 4 504, and the swing oil cylinder 2 has a cylinder cavity 1 211 and a cylinder cavity 2 212, and the housing 201 has an oil port 5 213 and an oil port 6 214, the port 3 503 communicates with the cylinder cavity 1 211 through the oil port 5 213, and the port 4 504 communicates with the cylinder cavity 2 212 through the oil port 6 214. The cylinder cavity 1 211 and the cylinder cavity 2 212 are the chambers at both ends of the piston inside the swing oil cylinder 2, and the rotation of the central rotating shaft 204 1 can be realized by charging and discharging hydraulic oil to the cylinder cavity 1 211 and the cylinder cavity 2 212. The port 3 503 and the port 4 504 are used to interface with external oil lines, and through the above arrangement, the operation of charging and discharging hydraulic oil to the cylinder cavity 1 211 and the cylinder cavity 2 212 can be realized through the port 3 503 and the port 4 504 to drive the rotation control of the rotating end 1 202 and the rotating end 2 203 in the swing oil cylinder 2. At this time, the port 1 501, the port 2 502, the port 3 503 and the port 4 504 are integrated on the port integration block 5, which is high in port integration, convenient for oil pipe connection, and compact and beautiful.

[0056] At the same time, based on Figures 2 to 4As shown, the overflow valve 6 is further included, and the passage one 505, the passage two 506, the passage three 507 and the passage four 508 are arranged in the port integrated block 5, the port one 501 is communicated with the oil port three 205 through the passage one 505, the port two 502 is communicated with the oil port four 206 through the passage two 506, the port three 503 is communicated with the oil port five 213 through the passage three 507, the port four 504 is communicated with the oil port six 214 through the passage four 508, the passage three 507 is communicated with the T port of the overflow valve 6, and the passage four 508 is communicated with the P port of the overflow valve 6. In this way, when the swing cylinder 2 has excessive pressure during the oil charging and discharging process, the pressure relief can be performed through the overflow valve 6. In the embodiment, the port integrated block 5 is arranged on the top wall of the casing 201, the end of the passage one 505 away from the port one 501 is arranged on the bottom wall of the port integrated block 5 and directly connected and communicated with the oil port three 205, the end of the passage two 506 away from the port two 502 is arranged on the bottom wall of the port integrated block 5 and directly connected and communicated with the oil port four 206, the end of the passage three 507 away from the port three 503 is arranged on the bottom wall of the port integrated block 5 and directly connected and communicated with the oil port five 213, and the end of the passage four 508 away from the port four 504 is arranged on the bottom wall of the port integrated block 5 and directly connected and communicated with the oil port six 214. The port one 501, the port two 502, the port three 503 and the port four 504 are arranged on both sides of the port integrated block 5.

[0057] The passage one 505, the passage two 506, the passage three 507 and the passage four 508 are processed by drilling. In the actual processing process, since the passage one 505, the passage two 506, the passage three 507 and the passage four 508 are bent inside the port integrated block 5, the corresponding passage directions required inside need to be drilled by means of the process holes 7 arranged outside the port integrated block 5. After the drilling is completed, the process holes 7 are plugged.

[0058] Further, based on Figure 5 and Figure 20As shown, the dotted line in the figure represents the flow path of hydraulic oil. The cylinder body 401 is provided with a valve cavity 407, in which a hydraulic control check valve 408 is installed, the end of the hydraulic control check valve 408 has a pressure oil port 409, and the side wall of the hydraulic control check valve 408 has a working oil port one 410 and a working oil port two 411. In this embodiment, the hydraulic control check valve 408 is a threaded plug-in hydraulic control check valve 408 screwed into the valve cavity 407, such as model YDF10-00, to facilitate assembly. For this model of hydraulic control check valve 408, when the pressure at the pressure oil port 409 or the working oil port one 410 is greater than the opening pressure, the working oil port one 410 and the working oil port two 411 can communicate with each other. The hydraulic control check valve 408 of this model is a prior art, and the principle will not be described again. When the hydraulic control check valve 408 is installed in the valve cavity 407, the pressure oil port 409 and the valve cavity 407 form an oil chamber one 412, at the same time, the valve cavity 407 and the working oil port one 410 of the hydraulic control check valve 408 form an oil chamber two 413, and the valve cavity 407 and the working oil port two 411 of the hydraulic control check valve 408 form an oil chamber three 414, the oil port one 405, the oil chamber one 412 and the rod cavity 403 are sequentially communicated, the rodless cavity 404 is communicated with the working oil port two 411 through the oil chamber three 414, and the working oil port one 410 is communicated with the oil port two 406 through the oil chamber two 413. When the oil pressure in the oil chamber one 412 or the oil pressure at the working oil port one 410 is greater than the opening pressure of the hydraulic control check valve 408, the working oil port one 410 and the working oil port two 411 are communicated. When the oil pressure in the oil chamber one 412 or the oil pressure at the working oil port one 410 is less than the opening pressure of the hydraulic control check valve 408, the working oil port one 410 and the working oil port two 411 are blocked from each other.

[0059] When oil is injected from the port one 501, the hydraulic oil entering the oil port one 405 of the driving oil cylinder 4 will first enter the oil chamber one 412 and then enter the rod cavity 403, the pressure in the oil chamber one 412 is greater than the opening pressure of the hydraulic control check valve 408 due to oil injection, the working oil port one 410 and the working oil port two 411 are communicated with each other, so that the oil in the rodless cavity 404 can pass through the working oil port two 411, the working oil port one 410 and the oil port two 406 in sequence, and finally be discharged from the port two 502, realizing the retraction control of the piston rod. If pressure relief occurs, the pressure in the oil chamber one 412 will decrease to less than the opening pressure of the hydraulic control check valve 408, the working oil port one 410 and the working oil port two 411 are blocked from each other, so that the hydraulic oil in the rodless cavity 404 cannot continue to be discharged, ensuring that the internal pressure of the rodless cavity 404 does not decay, preventing the piston from moving towards the rodless cavity 404, and avoiding the retraction of the piston rod.

[0060] When oil is injected from port two 502, hydraulic pressure enters working oil port one 410 from oil port two 406 of the driving cylinder 4, the pressure at working oil port one 410 is greater than the opening pressure of the hydraulic control one-way valve 408 due to oil injection, working oil port one 410 and working oil port two 411 are in communication with each other, and hydraulic oil can continue to enter the rodless cavity 404 through working oil port two 411, while the oil in the rod cavity 403 can sequentially pass through oil cavity one 412 and oil port one 405, and finally be discharged from port one 501, realizing the extension control of the piston rod. If the oil injection pipeline is broken or pressure relief occurs, the pressure entering the oil port two 406 drops to less than the opening pressure of the hydraulic control one-way valve 408, the first working oil port and the second working oil port are blocked from each other, so that the hydraulic oil in the rodless cavity 404 cannot flow reversely and be discharged, avoiding the retraction of the piston rod.

[0061] During the use of the excavator, neither port one 501 nor port two 502 is injected with oil, the pressure of oil cavity one 412 and working oil port one 410 is lower than the opening pressure of the hydraulic control one-way valve 408, working oil port one 410 and working oil port two 411 are blocked from each other, and the hydraulic oil in the rodless cavity 404 cannot be discharged. Even if pressure relief occurs, working oil port one 410 and working oil port two 411 will not be connected, avoiding the retraction of the piston rod.

[0062] As can be seen, whether the driving cylinder 4 is in the process of extension and retraction or the position of the piston rod is kept unchanged, it can ensure that the piston rod will not retract when pressure relief occurs, avoiding the situation that the tool falls off due to pressure relief. Since the oil circuit inside the driving cylinder 4 also has a bending arrangement, a process hole 7 needs to be drilled out of the cylinder body 401 during drilling processing to process the internal bending part. After processing, the process hole 7 is plugged.

[0063] Further, based on Figure 21 As shown, further comprising a slide rail 307, the bottom of the lower body 3 is provided with two installation plates 308 in parallel and spaced apart, the cylinder body 401 is fixedly installed between the two installation plates 308, the slide rail 307 is installed on the side walls opposite to each other of the two installation plates 308, the output end of the driving cylinder 4 is installed with a sliding block 309, the movable clamp 304 is fixedly connected with the sliding block 309 and the fixed clamp 303 is slidingly arranged on the slide rail 307. The slide rail 307 forms a support and guide effect on the movable clamp 304, avoiding the lateral force applied by the tool to the movable clamp 304 to be applied to the output end of the driving cylinder 4, ensuring the stability of the connection and the service life of the driving cylinder 4.

[0064] Further, based on Figure 1 and Figure 22As shown, the connecting shaft 101 has two, and the upper body 1 top parallel interval provided with two support plates 102, each support plate 102 is provided with two mounting holes 103, and the mounting holes 103 on the two support plates 102 are opposite to each other, and a plurality of bolt connection holes 104 are uniformly distributed around each mounting hole 103, each mounting hole 103 is provided with a connecting disc 105, a plurality of bolt holes 106 are distributed around the connecting disc 105, the bolt holes 106 and the bolt connection holes 104 are opposite to each other, and the connecting disc 105 is bolted with the support plate 102, so that the bolt connection holes 104 and the bolt holes 106 are aligned by rotating the connecting disc 105 to different angles, realizing the bolt connection of the connecting disc 105 and the support plate 102. Each connecting disc 105 is eccentrically provided with a support hole 107, and the two ends of the two connecting shafts 101 are respectively fixed and arranged in the support holes 107 opposite to each other. The support hole 107 is eccentrically arranged on the connecting disc 105, and by rotating the connecting disc 105 to different directions and bolted on the support plate 102, the center distance between the two support holes 107 on each support plate 102 can be adjusted, the center of the two connecting shafts 101 is adjusted, and the structure is simple and convenient to install.

[0065] Among them, one end of the connecting shaft 101 is fixedly installed with a limiting plate 108 larger than the size of the support hole 107, the other end of the connecting shaft 101 is sleeved with a shaft sleeve 109 larger than the size of the support hole 107, the shaft sleeve 109 is provided with a fastening screw 110, the fastening screw 110 is screwed from the outside through the shaft sleeve 109 and embedded in the connecting shaft 101, the limiting plate 108 and the shaft sleeve 109 abut on the opposite two connecting discs 105 on the side wall opposite to each other, so that the limiting plate 108 and the shaft sleeve 109 are clamped on the outside of the two support plates 102, the axial position of the connecting shaft 101 is fixed, and the main shaft is prevented from shaking.

[0066] The above only for the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application, should be included in the protection scope of the present application.

Claims

1. An integrated internal oil line quick coupler, comprising an upper body, a swing cylinder and a lower body, the upper body having a connecting shaft, the swing cylinder having a casing and a rotating end one and a rotating end two at both ends of the casing, the lower body having a top part with a connecting plate one and a connecting plate two fixedly connected with the rotating end one and the rotating end two respectively, the upper body being fixedly connected with the casing, the lower body being provided with a driving cylinder, the lower body having a bottom part provided with a fixed clamp and a movable clamp with their jaws opposite to each other, the fixed clamp being fixedly connected with the lower body, the movable clamp being fixedly connected with an output end of the driving cylinder; characterized in that a port integration block being mounted on a top part of the swing cylinder, the port integration block having a driving cylinder port, the swing cylinder and the connecting plate one having an internal oil line in sequence communication, the driving cylinder port being in communication with an internal cavity of the driving cylinder through the internal oil line.

2. The quick connector integrated with an internal oil passage according to claim 1, characterized in that: the driving cylinder port comprising a port one and a port two, the driving cylinder having a cylinder body fixedly connected with the lower body, the cylinder body having a cylinder barrel with a rod cavity and a rodless cavity, the cylinder body having an oil port one in communication with the rod cavity and an oil port two in communication with the rodless cavity; the swing cylinder having a central rotating shaft inside the casing, the rotating end one being at an end part of the central rotating shaft, an outer side wall of a root part of the central rotating shaft being in rotating abutment with an inner side wall of the casing, the casing being provided with an oil port three and an oil port four, the casing being provided with an oil groove one and an oil groove two around the outer side wall of the root part of the central rotating shaft, the central rotating shaft being provided with an oil channel one and an oil channel two inside the rotating end one, the connecting plate one being provided with an oil channel three and an oil channel four inside; the port one, the oil port three, the oil groove one, the oil channel one, the oil channel three and the oil port one being in sequence communication, the port two, the oil port four, the oil groove two, the oil channel two, the oil channel four and the oil port two being in sequence communication, the oil port three, the oil groove one, the oil channel one, the oil channel three, the oil port four, the oil groove two, the oil channel two and the oil channel four constituting the internal oil line.

3. The quick connector integrated with an internal oil passage according to claim 2, characterized in that: an end part of the oil channel three away from the oil channel one being located on a side wall where the connecting plate one and the cylinder body are attached to each other and directly in butt joint communication with the oil port one, an end part of the oil channel four away from the oil channel two being located on a side wall where the connecting plate one and the cylinder body are attached to each other and directly in butt joint communication with the oil port two.

4. The quick connector integrated with an internal oil passage according to claim 2, characterized in that: the port integration block further integrating a swing cylinder port, the swing cylinder port comprising a port three and a port four, the swing cylinder having a cylinder cavity one and a cylinder cavity two, the casing having an oil port five and an oil port six, the port three being in communication with the cylinder cavity one through the oil port five, the port four being in communication with the cylinder cavity two through the oil port six.

5. The quick connector integrated with an internal oil passage according to claim 4, characterized in that: Further comprising an overflow valve, the port integrated block is provided with passage one, passage two, passage three and passage four, the port one is communicated with the oil port three through the passage one, the port two is communicated with the oil port four through the passage two, the port three is communicated with the oil port five through the passage three, the port four is communicated with the oil port six through the passage four, the passage three is communicated with the T port of the overflow valve, and the passage four is communicated with the P port of the overflow valve.

6. The quick connector integrated with an internal oil passage according to claim 5, characterized in that: The port integrated block is installed on the top wall of the shell, the end of the passage one away from the port one is located on the bottom wall of the port integrated block and directly butts and communicates with the oil port three, the end of the passage two away from the port two is located on the bottom wall of the port integrated block and directly butts and communicates with the oil port four, the end of the passage three away from the port three is located on the bottom wall of the port integrated block and directly butts and communicates with the oil port five, and the end of the passage four away from the port four is located on the bottom wall of the port integrated block and directly butts and communicates with the oil port six.

7. The quick connector integrated with an internal oil passage according to claim 2, characterized in that: The cylinder body is provided with a valve cavity, a hydraulic control check valve is installed in the valve cavity, an end of the hydraulic control check valve is provided with a pressure oil port, a side wall of the hydraulic control check valve is provided with a working oil port one and a working oil port two, the pressure oil port and the valve cavity surround an oil chamber one, the valve cavity and the working oil port one surround an oil chamber two, the valve cavity and the working oil port two surround an oil chamber three, the oil port one, the oil chamber one and the rod cavity are sequentially communicated, the rodless cavity is communicated with the working oil port two through the oil chamber three, and the working oil port one is communicated with the oil port two through the oil chamber two. When the oil pressure in the oil chamber one or the oil pressure at the working oil port one is greater than the opening pressure of the hydraulic control check valve, the working oil port one and the working oil port two are communicated; when the oil pressure in the oil chamber one or the oil pressure at the working oil port one is less than the opening pressure of the hydraulic control check valve, the working oil port one and the working oil port two are blocked from each other.

8. The quick connector integrated with an internal oil passage according to claim 7, characterized in that: Further comprising a slide rail, the bottom of the lower main body is provided with two installation plates in parallel and at intervals, the cylinder body is fixedly installed between the two installation plates, the slide rail is installed on the side walls of the two installation plates opposite to each other, the output end of the driving oil cylinder is installed with a sliding block, the movable clamp is fixedly connected with the sliding block, and the fixed clamp is slidingly arranged on the slide rail.

9. Quick coupling integrated with internal oil circuit according to any of claims 1-8, characterized in that: The connecting shafts are two, the top of the upper main body is provided with two support plates in parallel and at intervals, each of the support plates is provided with two installation holes, the installation holes on the two support plates are opposite to each other, a plurality of bolt connection holes are uniformly distributed around each of the installation holes, each of the installation holes is provided with a connecting disc, a plurality of bolt holes are distributed around the circumference of the connecting disc, the bolt holes and the bolt connection holes are opposite to each other, the connecting disc and the support plate are bolted, each of the connecting discs is eccentrically provided with a support hole, and the two ends of the two connecting shafts are fixedly arranged in the support holes opposite to each other.

10. The quick connector integrated with an internal oil passage according to claim 9, characterized in that: One end of the connecting shaft is fixedly installed with a limiting plate with a size greater than the support hole, the other end of the connecting shaft is sleeved with a shaft sleeve with a size greater than the support hole, the shaft sleeve is provided with a fastening screw in a matched mode, the fastening screw is screwed from the outside through the shaft sleeve and embedded into the connecting shaft, and the limiting plate and the shaft sleeve are respectively abutted on the side walls of the two connecting discs opposite to each other.

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