Quick connector with rotary positioning structure for excavator

Abstract

The utility model provides a quick connector with a rotary positioning structure for an excavator, which is provided with a connecting rod fixing seat, a rotary supporting shell and a quick connecting component, the interior of the rotary supporting shell is of a hollow structure, a worm gear and a worm are respectively arranged in the rotary supporting shell, and the worm gear and the worm are meshed with each other to rotate. The lower end of the worm gear is fixedly connected with the upper end of the quick connection assembly, and the worm gear can drive the quick connection assembly to rotate synchronously while rotating. According to the quick connector, horizontal rotation of the quick connecting assembly can be achieved, in the bucket replacement operation, according to the actual placing angle of the bucket, the quick connecting assembly is rotated, the quick connecting assembly and the connecting rod of the bucket can be quickly aligned, finally, quick bucket replacement operation is achieved, the whole process is simple and quick, working time is saved, and the working efficiency is improved. The quick connector is not affected by the moving area of the excavator, and the quick connector and related parts cannot be damaged. The device can be widely applied to quickly replacing the bucket of the excavator.

Description

Technical Field

[0001] This utility model relates to a quick connector, and more particularly to a quick connector for excavators with a rotary positioning structure. Background Technology

[0002] Quick-connectors for excavators enable rapid bucket changes. However, in actual operation, buckets are usually positioned in any direction. This means that when changing buckets, the excavator needs to be manipulated to align the quick-connect assembly at the lower end of the quick-connector with the bucket's connecting rod, ensuring that the quick-connect assembly and the bucket's connecting rod are at the same angle. This method requires the excavator to have sufficient operating space, which is a significant limitation. Furthermore, the entire process is complex, cumbersome, inefficient, and time-consuming.

[0003] In actual operation, some operators use the excavator boom to drive the quick connector to push the bucket to be replaced, rotate it to the appropriate angle, and then perform the bucket replacement operation. However, this method will cause the quick connector to collide with the bucket. Under long-term impact, the quick connector and related components can easily be damaged, increasing maintenance costs. Utility Model Content

[0004] This utility model addresses the above-mentioned technical problems by providing a quick connector for excavators with a rotary positioning structure. This quick connector, through the meshing of a worm gear between the connecting rod fixing seat and the quick-connect assembly, enables the horizontal rotation of the quick-connect assembly. During bucket changing operations, the quick-connect assembly is rotated according to the actual angle of the bucket, allowing for rapid alignment between the quick-connect assembly and the bucket's connecting rod, ultimately achieving a quick bucket change operation. The entire process is simple and fast, saving working time, unaffected by the excavator's operating area, and will not damage the quick connector or related components.

[0005] Therefore, the technical solution of this utility model is a quick connector for excavators with a rotary positioning structure, which includes a connecting rod fixing seat, a rotary support housing, and a quick connector assembly.

[0006] The connecting rod retainer is located at the upper end of the quick connector, the rotary support housing is located in the middle of the quick connector, and the quick-connect assembly is located at the lower end of the quick connector.

[0007] The lower end of the connecting rod fixing seat is fixedly connected to the upper end of the rotating support housing. The interior of the rotating support housing is a hollow structure. The interior of the rotating support housing is equipped with a worm wheel and a worm. The worm wheel and the worm mesh with each other and rotate. The worm wheel can rotate laterally inside the rotating support housing. The lower end of the worm wheel is fixedly connected to the upper end of the quick-connect assembly. When the worm wheel rotates laterally, it can drive the quick-connect assembly to rotate synchronously.

[0008] Preferably, the connecting rod fixing seat is provided with a connecting rod locking shaft and a connecting seat plate. The connecting rod locking shaft is located in the upper section of the connecting rod fixing seat, and the connecting seat plate is located in the lower section of the connecting rod fixing seat. The connecting seat plate is fixedly connected to the upper end of the rotary support housing.

[0009] Preferably, the rotating support housing is provided with a front fixed section, a rear fixed section, and a middle rotating support section. The front fixed section is located at the front of the rotating support housing, the rear fixed section is located at the middle of the rotating support housing, and the middle rotating support section is located at the rear of the rotating support housing. The upper ends of the front fixed section and the rear fixed section are respectively fixedly connected to the lower end of the connecting base plate.

[0010] The front fixed section of the rotating support housing has a hole inside, which is set in the left and right direction inside the front fixed section of the rotating support housing, and the left end of the hole extends to the left side of the front fixed section of the rotating support housing.

[0011] The rotating support housing has a first receiving cavity inside the middle rotating support section, and the front end of the first receiving cavity is connected to the hole on the front fixed section of the rotating support housing.

[0012] A rotating support plate is provided at the lower end of the first receiving cavity, and a hole is provided in the middle of the rotating support plate;

[0013] A worm gear is installed inside the hole on the front fixed section of the rotating support housing, and a motor is connected to one end of the worm gear.

[0014] A worm gear is provided on the rotating support plate located on the outer circumference of the hole in the middle rotating support section of the rotating support housing. The worm gear meshes with the worm. A hole is provided at the center of the worm gear. The hole at the center of the worm gear is longitudinally connected to the hole inside the middle rotating support section of the rotating support housing. The lower end of the worm gear is rotatably supported and connected to the upper end of the corresponding rotating support plate.

[0015] Preferably, a positioning support plate is provided inside the first receiving cavity on the middle rotating support section of the rotating support housing at the upper end of the worm gear. The positioning support plate includes an upper part and a lower part. The upper part is located at the upper section of the positioning support plate, and the lower part is located at the lower section of the positioning support plate. The lower part is located at the center of the upper part. The longitudinal cross-section of the upper and lower parts is T-shaped. The lower end of the upper part is fixedly connected to the upper end of the worm gear. The upper end of the upper part is rotatably sealed to the lower end of the connecting plate. The outer circumference of the upper part is rotatably sealed to the inner circumference of the first receiving cavity on the middle rotating support section of the rotating support housing.

[0016] The lower section of the positioning support plate passes through the hole at the center of the worm gear. The outer circumference of the upper section of the positioning support plate is fixedly connected to the inner circumference of the hole at the center of the worm gear. The lower section of the positioning support plate is fixedly connected to the quick-connect assembly.

[0017] Preferably, the quick-connect assembly includes a front locking section, a middle rotating connecting section, and a rear locking section. The front locking section is located at the front of the quick-connect assembly, the middle rotating connecting section is located at the middle of the quick-connect assembly, and the rear locking section is located at the rear of the quick-connect assembly. The front locking section is provided with a front locking groove, and the rear locking section is provided with a rear locking groove.

[0018] The upper part of the middle rotating connecting section of the quick-connect assembly is provided with a quick-connect assembly fixing seat. The middle rotating connecting section of the quick-connect assembly has a longitudinally arranged hole located in the middle of the quick-connect assembly fixing seat, and the upper end of the hole extends through to the outside of the quick-connect assembly fixing seat.

[0019] The inner diameter of the hole at the center of the worm gear is smaller than the inner diameter of the hole on the middle rotating support section of the rotating support housing. A groove is formed between the outer circumference of the lower section of the positioning support plate, the lower end of the worm gear, and the inner circumference of the hole on the middle rotating support section of the rotating support housing. The quick-connect assembly fixing seat is located inside the groove. At the same time, the lower section of the positioning support plate is located inside the hole on the quick-connect assembly fixing seat. The inner circumference of the hole on the quick-connect assembly fixing seat is fixedly connected to the outer circumference of the lower section of the positioning support plate. Meanwhile, the upper end of the quick-connect assembly fixing seat is fixedly connected to the lower end of the worm gear. The outer circumference of the quick-connect assembly fixing seat is rotatably sealed to the inner circumference of the hole on the middle rotating support section of the rotating support housing.

[0020] Preferably, a second receiving cavity is provided inside the lower section of the middle rotating connecting section of the quick-connect assembly. A push-pull device is provided inside the second receiving cavity. The front and rear ends of the push-pull device are respectively connected to a front locking pin and a rear locking pin. The push-pull device can push the front locking pin and push the front locking pin into the front locking groove of the quick-connect assembly.

[0021] While the push-pull device pushes the front locking pin, the rear locking pin moves backward in sync. Under the pushing action of the push-pull device, the rear locking pin can enter the interior of the rear locking groove of the quick-connect assembly.

[0022] Preferably, the push-pull device is a linear hydraulic cylinder, which is arranged in the front-to-back direction inside the second receiving cavity;

[0023] The second receiving cavity has a third connecting plate located near the rear end. The two ends of the third connecting plate are fixedly connected to the left and right sides of the middle rotating connecting section of the quick-connect assembly, respectively.

[0024] The linear cylinder is located at the front end of the third connecting plate. The rear end of the cylinder body of the linear cylinder is fixedly connected to the front end of the third connecting plate. The front end of the piston rod on the linear cylinder is connected to the second connecting plate, and the front end of the second connecting plate is connected to the front locking pin.

[0025] The quick-connect assembly has a hole at the rear end of the quick-connect assembly front locking section. The two ends of the hole are connected to the quick-connect assembly front locking groove and the second receiving cavity, respectively. The front locking pin can pass through the hole and enter the interior of the quick-connect assembly front locking groove.

[0026] The rear end of the second connecting plate is connected to the first connecting plate. There are multiple first connecting plates, which are sequentially hinged to each other. The rear end of the first connecting plate is hinged to a rear locking pin. The rear locking section of the quick-connect assembly has a hole at the front end of the rear locking groove of the quick-connect assembly. The two ends of the hole are respectively connected to the rear locking groove of the quick-connect assembly and the second receiving cavity. The rear locking pin can pass through the hole and enter the interior of the rear locking groove of the quick-connect assembly.

[0027] The linear hydraulic cylinder is equipped with a hydraulic cylinder valve block, which has a fifth oil hole and a sixth oil hole respectively.

[0028] A longitudinal through hole is provided in the middle of the connecting base plate, and a longitudinal through hole is provided in the positioning support base plate at a position symmetrical to the hole in the connecting base plate. The lower end of the hole on the middle rotating connecting section of the quick-connect assembly passes through to the first receiving cavity at the lower section of the middle rotating connecting section of the quick-connect assembly.

[0029] The holes on the connecting base plate, the holes on the positioning support base plate, and the holes on the rotating connecting section in the middle of the quick-connect assembly together form a longitudinal through hole;

[0030] The through hole is equipped with a positioning support column. The positioning support column is equipped with a fixed connection section and a rotating support section. The fixed connection section is located at the upper part of the positioning support column, and the rotating support section is located at the lower part of the positioning support column.

[0031] The fixed connection section of the positioning support column is located at the upper end of the connecting seat plate. The lower end of the fixed connection section of the positioning support column is fixedly connected to the upper end of the connecting seat plate. The rotating support section of the positioning support column is located inside the through hole. The outer circumference of the upper part of the rotating support section of the positioning support column is fixedly connected to the inner circumference of the hole on the connecting seat plate. The outer circumference of the lower part of the rotating support section of the positioning support column is rotatably sealed to the inner circumference of the hole on the positioning support seat plate.

[0032] The positioning support column is provided with a first oil hole and a second oil hole, and the positioning support base plate is provided with a third oil hole and a fourth oil hole;

[0033] One side port of the first and second oil holes extends to the outside of the positioning support column, and the other side ports of the first and second oil holes are connected to one side ports of the third and fourth oil holes, respectively. The other side ports of the third and fourth oil holes are connected to the fifth and sixth oil holes, respectively.

[0034] Preferably, the lower end of the positioning support column fixed connection section is provided with a groove, and a dustproof sealing ring is provided in the groove. The lower end of the positioning support column fixed connection section and the upper end of the connecting seat plate are sealed and fixedly connected by the dustproof sealing ring.

[0035] The upper part of the upper section of the positioning support plate is provided with a groove. There are multiple grooves, and each groove is provided with an oil sealing ring and a wear-resistant support pad. The upper part of the upper section of the positioning support plate and the lower part of the connecting plate are connected by a rotary seal through the oil sealing ring and a rotary support through the wear-resistant support pad.

[0036] The inner circumference of the first receiving cavity on the middle rotating support section of the rotating support housing is provided with a groove, and an oil sealing ring is provided in the groove. The outer circumference of the upper part of the positioning support plate and the inner circumference of the first receiving cavity are rotated and sealed by the oil sealing ring.

[0037] The lower end of the worm gear is provided with a groove, and a wear-resistant support pad is provided in the groove. The lower end of the worm gear and the upper end of the corresponding rotating support plate are rotatably supported and connected by the wear-resistant support pad.

[0038] The inner circumference of the hole on the middle rotating support section of the rotating support housing is provided with a groove. There are multiple grooves, and each groove is provided with a dustproof sealing ring and a wear-resistant support pad. The outer circumference of the quick-connect component fixing seat and the inner circumference of the hole on the middle rotating support section of the rotating support housing are rotated and sealed by the dustproof sealing ring and rotated and supported by the wear-resistant support pad.

[0039] Preferably, a push-pull device protective plate is fixedly provided at the lower end of the middle rotating connection section of the quick-connect assembly.

[0040] Preferably, the front fixing section and the rear fixing section of the rotary support housing are respectively fixed to the connecting base plate by screws;

[0041] The upper part of the positioning support plate is locked and fixed to the worm gear with screws;

[0042] The quick-connect assembly mounting base and the worm gear are locked together by screws;

[0043] The lower end of the rotating connecting section in the middle of the push-pull device is locked and fixed with screws.

[0044] The beneficial effects of this utility model are:

[0045] 1. A worm gear and a worm are respectively installed inside the rotating support housing. The worm gear and the worm rotate in mesh with each other. The worm gear can rotate laterally inside the rotating support housing. One end of the worm is connected to a motor, which controls the rotation of the worm. The lower end of the worm gear is fixedly connected to the upper end of the quick-connect assembly. In use, the motor controls the rotation of the worm, which drives the worm gear to rotate laterally. The worm gear rotates laterally and simultaneously drives the quick-connect assembly to rotate synchronously, rotating the quick-connect assembly to the same angle as the bucket. Through the locking grooves at the front and rear ends of the quick-connect assembly, it is quickly aligned with the connecting rod of the bucket, thus realizing the quick bucket change operation. The whole process is simple and fast, saves working time, is not affected by the excavator's operating area, and will not damage the quick connector and related components.

[0046] 2. By setting a positioning support column in the middle of the positioning support base plate, on the one hand, the positioning support column, being located in the middle of the positioning support base plate, can increase the stability of the positioning support base plate, worm gear, and quick-connect assembly when rotating synchronously, avoiding lateral swaying during synchronous rotation. Lateral swaying during synchronous rotation will cause oil leakage from the quick connector and damage to related internal components. On the other hand, by placing the positioning support column inside the quick connector and the oil supply hole inside the positioning support column, the overall compactness of the quick connector can be increased, avoiding interference with actual operation caused by the oil supply line being located outside the quick connector, and preventing collisions with the oil supply line during operation, which could lead to damage to the line. Attached Figure Description

[0047] Figure 1 This is a perspective view of the utility model;

[0048] Figure 2 This is another perspective view of the present invention;

[0049] Figure 3 This is the front view of this utility model;

[0050] Figure 4 This is a utility model Figure 3 Sectional view of AA;

[0051] Figure 5 This is a utility model Figure 3 BB section view;

[0052] Figure 6 This is a utility model Figure 3 CC section view;

[0053] Figure 7 This is a perspective view of the linear cylinder connection structure in this utility model;

[0054] Figure 8 This is a perspective view of the connection structure between the worm gear and the worm in this utility model;

[0055] Figure 9 This is a perspective view of the rotating support shell in this utility model;

[0056] Figure 10 This is a cross-sectional view of the quick-connect component structure in this utility model;

[0057] Figure 11 This is a utility model Figure 4 Enlarged view of point D in the middle.

[0058] Explanation of symbols in the diagram:

[0059] 1. Connecting rod fixing seat; 101. Connecting rod locking shaft; 102. Connecting seat plate; 2. Rotary support housing; 201. Front fixing section of rotary support housing; 202. Rear fixing section of rotary support housing; 203. Middle rotary support section of rotary support housing; 204. Rotary support seat plate; 205. First receiving cavity; 3. Quick-connect assembly; 301. Front locking section of quick-connect assembly; 302. Middle rotary connecting section of quick-connect assembly; 30201. Quick-connect assembly fixing seat; 303. Rear locking section of quick-connect assembly; 304. Front locking groove of quick-connect assembly; 305. Rear locking groove of quick-connect assembly; 306. Push-pull device protective plate; 307. Second receiving cavity; 4. Motor; 5. Positioning support column; 501. First oil hole; 502. Second oil hole; 503. Fixed connection section of positioning support column; 504. Rotary support section of positioning support column; 6. Positioning support base plate; 601. Upper part of positioning support base plate; 602. Lower part of positioning support base plate; 603. Third oil hole; 604. Fourth oil hole; 7. Worm gear; 8. Worm; 9. Linear cylinder; 901. Cylinder valve block; 902. Fifth oil hole; 903. Sixth oil hole; 10. Screw; 11. Front locking pin; 12. Rear locking pin; 13. First connecting plate; 14. Second connecting plate; 15. Third connecting plate; 16. Hole; 17. Dustproof sealing ring; 18. Oil sealing ring; 19. Wear-resistant support pad; 20. Through hole; 21. Groove; 22. Rotary support column. Detailed Implementation

[0060] The present invention will be further described below with reference to the embodiments.

[0061] pass Figures 1-11 As can be seen, the quick connector for excavators with a rotary positioning structure includes a connecting rod fixing seat 1, a rotary support housing 2, and a quick-connect assembly 3. The connecting rod fixing seat 1 is located at the upper end of the quick connector, the rotary support housing 2 is located in the middle of the quick connector, and the quick-connect assembly 3 is located at the lower end of the quick connector. The lower end of the connecting rod fixing seat 1 is fixedly connected to the upper end of the rotary support housing 2. The interior of the rotary support housing 2 is a hollow structure, and a worm gear 7 and a worm 8 are respectively provided inside the rotary support housing 2. The worm gear 7 can mesh and rotate with each other. The worm gear 7 can rotate laterally inside the rotary support housing 2. The lower end of the worm gear 7 is fixedly connected to the upper end of the quick-connect assembly 3. While the worm gear 7 rotates laterally, it can drive the quick-connect assembly 3 to rotate synchronously. The quick-connect assembly 3 is respectively provided with a front locking groove 304 and a rear locking groove 305 for locking and fixing with the connecting rod of the bucket.

[0062] The connecting rod fixing seat 1 is provided with a connecting rod locking shaft 101 and a connecting seat plate 102. The connecting rod locking shaft 101 is located at the upper section of the connecting rod fixing seat 1, and the connecting seat plate 102 is located at the lower section of the connecting rod fixing seat 1. The connecting seat plate 102 is fixedly connected to the upper end of the rotating support housing 2. The connecting rod locking shaft 101 is used to connect with the boom connecting rod of the excavator.

[0063] The rotating support housing 2 is provided with a front fixed section 201, a rear fixed section 202, and a middle rotating support section 203. The front fixed section 201 is located at the front of the rotating support housing 2, the rear fixed section 202 is located at the middle of the rotating support housing 2, and the middle rotating support section 203 is located at the rear of the rotating support housing 2. The upper ends of the front fixed section 201 and the rear fixed section 202 are respectively fixedly connected to the lower end of the connecting base plate 102.

[0064] The front end fixing section 201 of the rotating support housing has a hole 16 inside. The hole 16 is arranged in the left and right direction inside the front end fixing section 201 of the rotating support housing, and the left port of the hole 16 extends to the left side of the front end fixing section 201 of the rotating support housing.

[0065] The rotating support section 203 in the middle of the rotating support housing has a first receiving cavity 205 inside. The front end of the first receiving cavity 205 is connected to the hole 16 on the front fixed section 201 of the rotating support housing.

[0066] A rotating support plate 204 is provided at the lower end of the first receiving cavity 205, and a hole 16 is provided in the middle of the rotating support plate 204.

[0067] A worm gear 8 is provided inside the hole 16 on the front fixed section 201 of the rotating support housing. One end of the worm gear 8 is connected to a motor 4. The motor 4 can drive the worm gear 8 to rotate. At the same time as the worm gear 8 rotates, it drives the worm wheel 7 to rotate. At the same time as the worm wheel 7 rotates, it drives the quick-connect assembly 3 to rotate.

[0068] A worm gear 7 is provided on the rotating support plate 204 located on the outer circumference of the hole 16 inside the rotating support section 203 of the rotating support housing. The worm gear 7 meshes with the worm 8. The worm gear 7 has a hole 16 at its center. The hole 16 at the center of the worm gear 7 is longitudinally connected to the hole 16 inside the rotating support section 203 of the rotating support housing. The lower end of the worm gear 7 is rotatably supported and connected to the upper end of the corresponding rotating support plate 204.

[0069] A positioning support plate 6 is provided inside the first receiving cavity 205 on the intermediate rotating support section 203 of the rotating support housing, located at the upper end of the worm gear 7. The positioning support plate 6 includes an upper part 601 and a lower part 602. The upper part 601 is located at the upper section of the positioning support plate 6, and the lower part 602 is located at the lower section of the positioning support plate 6. Moreover, the lower part 602 is located at the center of the upper part 601. The longitudinal cross-section of the upper part 601 and the lower part 602 is T-shaped. The lower end of the upper part 601 is fixedly connected to the upper end of the worm gear 7, and the upper end of the upper part 601 is rotatably and sealingly connected to the lower end of the connecting plate 102. The outer circumference of the upper part 601 is rotatably and sealingly connected to the inner circumference of the first receiving cavity 205 on the intermediate rotating support section 203 of the rotating support housing.

[0070] The lower section 602 of the positioning support plate passes through the hole 16 at the center of the worm gear 7. The outer circumference of the upper section of the positioning support plate 602 is fixedly connected to the inner circumference of the hole 16 at the center of the worm gear 7. The lower section of the positioning support plate 602 is fixedly connected to the quick-connect assembly 3.

[0071] The steps for the rotation of the quick-connect assembly 3 are as follows: the motor 4 drives the worm 8 to rotate, the worm 8 drives the worm wheel 7 and the positioning support plate 6 to rotate synchronously, and the rotation of the worm wheel 7 and the positioning support plate 6 drives the quick-connect assembly 3 to rotate at the same time, thus completing the quick installation of the excavator bucket.

[0072] The quick-connect assembly 3 includes a front locking section 301, a middle rotating connecting section 302, and a rear locking section 303. The front locking section 301 is located at the front of the quick-connect assembly 3, the middle rotating connecting section 302 is located in the middle of the quick-connect assembly 3, and the rear locking section 303 is located at the rear of the quick-connect assembly 3. The front locking section 301 is provided with a front locking groove 304, and the rear locking section 303... The quick-connect component is provided with a rear locking groove 305, a front locking groove 304, and a rear locking groove 305 for locking and fixing with the connecting rod of the bucket. The opening direction of the front locking groove 304 is downward and the opening direction of the rear locking groove 305 is rearward. During installation, first, the rear locking groove 305 of the quick-connect component is attached to one of the connecting rods of the bucket in a horizontal direction. Then, the front locking groove 304 of the quick-connect component is attached to the other connecting rod of the bucket from top to bottom.

[0073] The upper part of the quick-connect component intermediate rotating connecting section 302 is provided with a quick-connect component fixing seat 30201. The quick-connect component intermediate rotating connecting section 302 is provided with a longitudinally arranged hole 16 located in the middle of the quick-connect component fixing seat 30201. The upper end of the hole 16 extends through to the outside of the quick-connect component fixing seat 30201.

[0074] The inner diameter of the hole 16 at the center of the worm gear 7 is smaller than the inner diameter of the hole 16 on the intermediate rotary support section 203 of the rotary support housing. A groove 21 is formed between the outer circumference of the lower section of the positioning support plate 602, the lower end of the worm gear 7, and the inner circumference of the hole 16 on the intermediate rotary support section 203 of the rotary support housing. The quick-connect component fixing seat 30201 is located inside the groove 21. At the same time, the lower section of the positioning support plate 602 is located inside the hole 16 on the quick-connect component fixing seat 30201. The inner circumference of the hole 16 on the quick-connect component fixing seat 30201 is fixedly connected to the outer circumference of the lower section of the positioning support plate 602. Meanwhile, the upper end of the quick-connect component fixing seat 30201 is fixedly connected to the lower end of the worm gear 7. The outer circumference of the quick-connect component fixing seat 30201 is rotatably sealed to the inner circumference of the hole 16 on the intermediate rotary support section 203 of the rotary support housing.

[0075] The lower section of the intermediate rotating connecting section 302 of the quick-connect assembly is provided with a second receiving cavity 307. The second receiving cavity 307 is provided with a push-pull device. The front and rear ends of the push-pull device are respectively connected to a front locking pin 11 and a rear locking pin 12. The push-pull device can push the front locking pin 11 into the front locking groove 304 of the quick-connect assembly. According to the design of this patent, the front locking pin 11 can be pushed to the groove opening of the front locking groove 304 of the quick-connect assembly. At the same time as the push-pull device pushes the front locking pin 11, the rear locking pin 12 moves backward synchronously. Under the pushing action of the push-pull device, the rear locking pin 12 can enter the rear locking groove 305 of the quick-connect assembly. According to the design of this patent, the rear locking pin 12 can be pushed to the upper side of the rear locking groove 305 of the quick-connect assembly.

[0076] In actual operation, after the rear locking groove 305 and the front locking groove 304 of the quick-connect assembly are respectively attached to the connecting rod of the bucket, the push-pull device pushes the front locking pin 11 to the slot position inside the front locking groove 304 of the quick-connect assembly, locking one of the connecting plates on the bucket inside the front locking groove 304 of the quick-connect assembly. At the same time as the push-pull device pushes the front locking pin 11, the rear locking pin 12 is simultaneously moved to the upper position inside the rear locking groove 305 of the quick-connect assembly, locking the other connecting plate on the bucket between the rear locking groove 305 and the rear locking pin 12 of the quick-connect assembly. Finally, under the combined action of the rear locking groove 305 and the front locking groove 304 of the quick-connect assembly, as well as the front locking pin 11 and the rear locking pin 12, the bucket is firmly locked onto the quick-connect assembly 3.

[0077] Regarding the specific structure of the push-pull device, in this patent, the push-pull device is a linear hydraulic cylinder 9. The linear hydraulic cylinder 9 is arranged along the front-to-back direction inside the second receiving cavity 307. A third connecting plate 15 is provided near the rear end inside the second receiving cavity 307. The two ends of the third connecting plate 15 are respectively fixedly connected to the left and right sides of the middle rotating connecting section 302 of the quick-connect assembly. The linear hydraulic cylinder 9 is located at the front end of the third connecting plate 15. The rear end of the cylinder body of the linear hydraulic cylinder 9 is fixedly connected to the front end of the third connecting plate 15. The front end of the piston rod on the linear hydraulic cylinder 9... A second connecting plate 14 is connected, and a front locking pin 11 is connected to the front end of the second connecting plate 14. A hole 16 is provided on the front locking section 301 of the quick-connect assembly at the rear end of the front locking groove 304 of the quick-connect assembly. The two ends of the hole 16 communicate with the front locking groove 304 and the second receiving cavity 307 of the quick-connect assembly, respectively. The front locking pin 11 can pass through the hole 16 and enter the interior of the front locking groove 304 of the quick-connect assembly. A first connecting plate 13 is connected to the rear end of the second connecting plate 14. There are multiple first connecting plates 13. The first connecting plate 13 is hinged sequentially front and rear. A rear locking pin 12 is hinged to the rear end of the first connecting plate 13. A hole 16 is provided on the rear locking section 303 of the quick-connect assembly at the front end of the rear locking groove 305. The two ends of the hole 16 communicate with the rear locking groove 305 and the second receiving cavity 307 of the quick-connect assembly, respectively. The rear locking pin 12 can pass through the hole 16 and enter the interior of the rear locking groove 305 of the quick-connect assembly. Regarding the specific structure of the first connecting plate 13, in this patent, the first connecting plate 13 has three sections. The front section of the first connecting plate 13... The front end of the first connecting plate 13 is hinged to the second connecting plate 14. The rear end of the first connecting plate 13 is hinged to the front end of the first connecting plate 13 in the middle section. The rear end of the first connecting plate 13 in the middle section is hinged to the front end of the first connecting plate 13 in the rear section. The rear end of the first connecting plate 13 in the rear section is hinged to the front end of the rear locking pin 12. A rotating support column 22 is connected to the middle position of the first connecting plate 13 in the middle section. The outer side of the rotating support column 22 is fixedly connected to the side wall of the second receiving cavity 307. The first connecting plate 13 in the middle section can rotate on the rotating support column 22.

[0078] The push-pull device can also use other devices with push-pull functions, such as mechanical lead screws, electronic actuators, etc.

[0079] The front locking pin 11, the first connecting plate 13, the rotating support column 22 and the rear locking pin 12 form a locking assembly. There are two locking assemblies, which are located inside the second receiving cavity 307 on the left and right sides of the linear cylinder 9, respectively.

[0080] The linear hydraulic cylinder 9 is equipped with a hydraulic cylinder valve block 901, and the hydraulic cylinder valve block 901 is equipped with a fifth oil hole 902 and a sixth oil hole 903 respectively.

[0081] A longitudinal through hole 16 is provided in the middle of the connecting base plate 102. A longitudinal through hole 16 is provided in the positioning support base plate 6 at a longitudinally symmetrical position to the hole 16 on the connecting base plate 102. The lower end of the hole 16 on the intermediate rotating connecting section 302 of the quick-connect assembly extends into the first receiving cavity 205 at the lower section of the intermediate rotating connecting section 302 of the quick-connect assembly. The hole 16 on the connecting base plate 102, the hole 16 on the positioning support base plate 6, and the hole 16 on the intermediate rotating connecting section 302 of the quick-connect assembly together form a longitudinal through hole 20. A positioning support post 5 is provided inside the through hole 20. The positioning support post 5 is provided with a positioning support post fixed connecting section 503 and a positioning support post rotating support section 504. The positioning support post fixed connecting section 503 is located at the upper section of the positioning support post 5, and the positioning support post rotating support section 504 is located at the lower section of the positioning support post 5. The positioning support post fixed connecting section 503 is located at the upper end of the connecting base plate 102. The lower end of the support column fixed connection section 503 is fixedly connected to the upper end of the connecting seat plate 102. The positioning support column rotating support section 504 is located inside the through hole 20. The outer circumference of the upper part of the positioning support column rotating support section 504 is fixedly connected to the inner circumference of the hole 16 on the connecting seat plate 102. The outer circumference of the lower part of the positioning support column rotating support section 504 is rotatably sealed to the inner circumference of the hole 16 on the positioning support seat plate 6. The positioning support column 5 is provided with a first oil hole 501 and a second oil hole 502. The positioning support seat plate 6 is provided with a third oil hole 603 and a fourth oil hole 604. One side port of the first oil hole 501 and the second oil hole 502 respectively extends to the outside of the positioning support column 5. The other side port of the first oil hole 501 and the second oil hole 502 respectively communicates with one side port of the third oil hole 603 and the fourth oil hole 604 respectively. The other side port of the third oil hole 603 and the fourth oil hole 604 respectively communicates with the fifth oil hole 902 and the sixth oil hole 903 respectively.

[0082] By employing the positioning support column 5, on the one hand, since the positioning support column 5 is located in the middle of the positioning support base plate 6, it can increase the stability of the positioning support base plate 6, worm gear 7, and quick-connect assembly 3 when rotating synchronously, and avoid lateral swaying during synchronous rotation. If lateral swaying occurs during synchronous rotation, it will cause the oil inside the quick connector to leak outward and damage to related internal components. On the other hand, by placing the positioning support column 5 inside the quick connector and placing the oil supply hole inside the positioning support column 5, the overall compactness of the quick connector can be increased, avoiding interference with actual operation due to the oil supply line being located outside the quick connector, and preventing collisions with the oil supply line during operation, which could cause damage to the line.

[0083] The lower end of the positioning support column fixed connection section 503 is provided with a groove, and a dustproof sealing ring 17 is provided in the groove. The lower end of the positioning support column fixed connection section 503 and the upper end of the connecting seat plate 102 are sealed and fixedly connected by the dustproof sealing ring 17.

[0084] The upper part of the upper section 601 of the positioning support plate is provided with a groove, and there are multiple grooves. Each groove contains an oil sealing ring 18 and a wear-resistant support pad 19. The upper part of the upper section 601 of the positioning support plate and the lower part of the connecting plate 102 are connected by a rotary seal using the oil sealing ring 18 and a rotary support using the wear-resistant support pad 19. The inner circumference of the first receiving cavity 205 on the middle rotary support section 203 of the rotary support housing is provided with a groove, and an oil sealing ring 18 is provided in the groove. The outer circumference of the upper section 601 of the positioning support plate and the inner circumference of the first receiving cavity 205 are connected by a rotary seal using the oil sealing ring 18. The lower end of the worm gear 7 is provided with a groove, and a wear-resistant support pad 19 is provided in the groove. The lower end of the worm gear 7 is rotatably supported and connected to the upper end of the corresponding rotary support base plate 204 through the wear-resistant support pad 19. The inner circumference of the hole 16 on the middle rotary support section 203 of the rotary support housing is provided with a groove. There are multiple grooves, and dustproof sealing rings 17 and wear-resistant support pads 19 are provided in the multiple grooves respectively. The outer circumference of the quick-connect component fixing seat 30201 and the inner circumference of the hole 16 on the middle rotary support section 203 of the rotary support housing are rotatably sealed and connected through the dustproof sealing ring 17 and rotatably supported through the wear-resistant support pad 19.

[0085] The dustproof sealing ring 17 serves to seal and prevent dust and impurities from the external environment from entering the interior of the quick connector through the corresponding gaps during operation, thus preventing wear on the corresponding components inside the quick connector.

[0086] The oil seal ring 18 can prevent the oil inside the quick connector from leaking out. Oil leakage will directly cause wear on the relevant components inside the quick connector and reduce its service life.

[0087] The wear-resistant support pad 19 is made of materials such as PTFE+copper powder, phenolic cloth, cypress, and nylon, which have high wear resistance, high support force, and high guiding stability. It can avoid direct friction between the corresponding rotating parts, which would lead to increased noise during rotation. In addition, it can reduce the frictional resistance between the relevant rotating parts, increase the stability and smoothness of rotation, and ensure the consistency of circumferential force when the positioning support plate 6, worm gear 7, and quick-connect assembly 3 rotate synchronously.

[0088] A push-pull device protective plate 306 is fixedly provided at the lower end of the intermediate rotating connecting section 302 of the quick-connect assembly. The push-pull device protective plate 306 can prevent the push-pull device inside the second receiving cavity 307 from being bumped during operation.

[0089] The front fixed section 201 and the rear fixed section 202 of the rotating support housing are locked and fixed to the connecting base plate 102 by screws 10. The upper part 601 of the positioning support base plate is locked and fixed to the worm gear 7 by screws 10. The quick-connect assembly fixing seat 30201 is locked and fixed to the worm gear 7 by screws 10. The push-pull device protective plate 306 is locked and fixed to the lower end of the middle rotating connecting section 302 of the quick-connect assembly by screws 10. The locking and fixing by screws 10 can realize the quick disassembly and assembly of related components, which is convenient for the initial assembly and the later maintenance.

[0090] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A quick connector for excavators with a rotary positioning structure, characterized in that: It is equipped with a connecting rod fixing seat, a rotary support housing, and a quick-connect assembly; The connecting rod fixing seat is located at the upper end of the quick connector, the rotating support housing is located in the middle of the quick connector, and the quick connector assembly is located at the lower end of the quick connector. The lower end of the connecting rod fixing seat is fixedly connected to the upper end of the rotating support housing. The interior of the rotating support housing is a hollow structure. A worm wheel and a worm are respectively provided inside the rotating support housing. The worm wheel and the worm rotate in mutual mesh. The worm wheel can rotate laterally inside the rotating support housing. The lower end of the worm wheel is fixedly connected to the upper end of the quick-connect assembly. When the worm wheel rotates laterally, it can drive the quick-connect assembly to rotate synchronously.

2. The quick connector for excavators with a rotary positioning structure according to claim 1, characterized in that: The connecting rod fixing seat is provided with a connecting rod locking shaft and a connecting seat plate. The connecting rod locking shaft is located at the upper section of the connecting rod fixing seat, and the connecting seat plate is located at the lower section of the connecting rod fixing seat. The connecting seat plate is fixedly connected to the upper end of the rotary support housing.

3. The quick connector for excavators with a rotary positioning structure according to claim 2, characterized in that: The rotating support housing is provided with a front fixed section, a rear fixed section, and a middle rotating support section. The front fixed section is located at the front of the rotating support housing, the rear fixed section is located at the middle of the rotating support housing, and the middle rotating support section is located at the rear of the rotating support housing. The upper ends of the front fixed section and the rear fixed section are respectively fixedly connected to the lower end of the connecting base plate. The front end fixing section of the rotating support housing has a hole inside, which is arranged in the left-right direction inside the front end fixing section of the rotating support housing, and the left end of the hole extends to the left side of the front end fixing section of the rotating support housing. The rotating support housing has a first receiving cavity inside the middle rotating support section, and the front end of the first receiving cavity is connected to a hole on the front fixed section of the rotating support housing. A rotating support plate is provided at the lower end of the first receiving cavity, and a hole is provided in the middle of the rotating support plate; A worm gear is installed inside the hole on the front fixed section of the rotary support housing, and a motor is connected to one end of the worm gear; A worm gear is provided on the rotating support plate located on the outer circumference of the hole in the middle rotating support section of the rotating support housing. The worm gear meshes with the worm. A hole is provided at the center of the worm gear. The hole at the center of the worm gear is longitudinally connected to the hole inside the middle rotating support section of the rotating support housing. The lower end of the worm gear is rotatably supported and connected to the upper end of the corresponding rotating support plate.

4. The quick connector for excavators with a rotary positioning structure according to claim 3, characterized in that: The first receiving cavity on the intermediate rotating support section of the rotating support housing is provided with a positioning support plate located at the upper end of the worm gear. The positioning support plate includes an upper section and a lower section. The upper section is located at the upper part of the positioning support plate, and the lower section is located at the lower part of the positioning support plate. The lower section is located at the center of the upper section. The longitudinal cross-section of the upper and lower sections is T-shaped. The lower end of the upper section is fixedly connected to the upper end of the worm gear. The upper end of the upper section is rotatably sealed to the lower end of the connecting plate. The outer circumference of the upper section is rotatably sealed to the inner circumference of the first receiving cavity on the intermediate rotating support section of the rotating support housing. The lower section of the positioning support plate passes through the hole at the center of the worm gear. The outer circumference of the upper section of the lower section of the positioning support plate is fixedly connected to the inner circumference of the hole at the center of the worm gear. The lower section of the lower section of the positioning support plate is fixedly connected to the quick-connect assembly.

5. The quick connector for excavators with a rotary positioning structure according to claim 4, characterized in that: The quick-connect assembly includes a front locking section, a middle rotating connecting section, and a rear locking section. The front locking section is located at the front of the quick-connect assembly, the middle rotating connecting section is located in the middle of the quick-connect assembly, and the rear locking section is located at the rear of the quick-connect assembly. The front locking section and the rear locking section are provided with a front locking groove and a rear locking groove, respectively. The upper part of the middle rotating connecting section of the quick-connect component is provided with a quick-connect component fixing seat. The middle rotating connecting section of the quick-connect component is provided with a longitudinally arranged hole at the middle position of the quick-connect component fixing seat, and the upper end of the hole extends through to the outside of the quick-connect component fixing seat. The inner diameter of the hole at the center of the worm gear is smaller than the inner diameter of the hole on the middle rotating support section of the rotating support housing. A groove is formed between the outer circumference of the lower section of the positioning support plate, the lower end of the worm gear, and the inner circumference of the hole on the middle rotating support section of the rotating support housing. The quick-connect assembly fixing seat is located inside the groove. At the same time, the lower section of the positioning support plate is located inside the hole on the quick-connect assembly fixing seat. The inner circumference of the hole on the quick-connect assembly fixing seat is fixedly connected to the outer circumference of the lower section of the positioning support plate. Meanwhile, the upper end of the quick-connect assembly fixing seat is fixedly connected to the lower end of the worm gear. The outer circumference of the quick-connect assembly fixing seat is rotatably sealed to the inner circumference of the hole on the middle rotating support section of the rotating support housing.

6. The quick connector for excavators with a rotary positioning structure according to claim 5, characterized in that: The lower section of the middle rotating connecting section of the quick-connect assembly is provided with a second receiving cavity. The second receiving cavity is provided with a push-pull device. The front and rear ends of the push-pull device are respectively connected to a front locking pin and a rear locking pin. The push-pull device can push the front locking pin and push the front locking pin into the front locking groove of the quick-connect assembly. While the push-pull device pushes the front locking pin, the rear locking pin moves backward synchronously. Under the pushing action of the push-pull device, the rear locking pin can enter the interior of the rear locking groove of the quick-connect assembly.

7. The quick connector for excavators with a rotary positioning structure according to claim 6, characterized in that: The push-pull device is a linear hydraulic cylinder, which is arranged in the front-to-back direction inside the second receiving cavity; A third connecting plate is provided inside the second receiving cavity near the rear end, and the two ends of the third connecting plate are fixedly connected to the left and right sides of the middle rotating connecting section of the quick-connect assembly, respectively. The linear cylinder is located at the front end of the third connecting plate. The rear end of the cylinder body of the linear cylinder is fixedly connected to the front end of the third connecting plate. The front end of the piston rod on the linear cylinder is connected to the second connecting plate, and the front end of the second connecting plate is connected to the front locking pin. The quick-connect assembly has a hole at the rear end of the quick-connect assembly front locking section. The two ends of the hole are respectively connected to the quick-connect assembly front locking groove and the second receiving cavity. The front locking pin can pass through the hole and enter the interior of the quick-connect assembly front locking groove. The rear end of the second connecting plate is connected to the first connecting plate. There are multiple first connecting plates, which are sequentially hinged to each other. The rear end of the first connecting plate is hinged to a rear locking pin. The rear locking section of the quick-connect assembly has a hole at the front end of the rear locking groove of the quick-connect assembly. The two ends of the hole are respectively connected to the rear locking groove of the quick-connect assembly and the second receiving cavity. The rear locking pin can pass through the hole and enter the interior of the rear locking groove of the quick-connect assembly. The linear hydraulic cylinder is provided with a hydraulic cylinder valve block, and the hydraulic cylinder valve block is provided with a fifth oil hole and a sixth oil hole respectively; The connecting base plate has a longitudinal through hole in the middle position, and the positioning support base plate has a longitudinal through hole at a position symmetrical to the hole in the connecting base plate. The lower end of the hole on the middle rotating connecting section of the quick-connect assembly passes through to the first receiving cavity at the lower section of the middle rotating connecting section of the quick-connect assembly. The holes on the connecting base plate, the holes on the positioning support base plate, and the holes on the middle rotating connecting section of the quick-connect assembly together form a longitudinal through hole. The through hole is provided with a positioning support column. The positioning support column is provided with a positioning support column fixed connection section and a positioning support column rotating support section. The positioning support column fixed connection section is located at the upper section of the positioning support column, and the positioning support column rotating support section is located at the lower section of the positioning support column. The fixed connection section of the positioning support column is located at the upper end of the connecting seat plate. The lower end of the fixed connection section of the positioning support column is fixedly connected to the upper end of the connecting seat plate. The rotating support section of the positioning support column is located inside the through hole. The outer circumference of the upper part of the rotating support section of the positioning support column is fixedly connected to the inner circumference of the hole on the connecting seat plate. The outer circumference of the lower part of the rotating support section of the positioning support column is rotatably and sealingly connected to the inner circumference of the hole on the positioning support seat plate. The positioning support column is provided with a first oil hole and a second oil hole, and the positioning support base plate is provided with a third oil hole and a fourth oil hole. One side port of the first oil hole and the second oil hole respectively extends to the outside of the positioning support column. The other side ports of the first oil hole and the second oil hole are respectively connected to one side ports of the third oil hole and the fourth oil hole. The other side ports of the third oil hole and the fourth oil hole are respectively connected to the fifth oil hole and the sixth oil hole.

8. The quick connector for excavators with a rotary positioning structure according to claim 7, characterized in that: The lower end of the positioning support column fixed connection section is provided with a groove, and a dustproof sealing ring is provided in the groove. The lower end of the positioning support column fixed connection section and the upper end of the connecting seat plate are sealed and fixedly connected by the dustproof sealing ring. The upper part of the upper section of the positioning support plate is provided with a groove, and there are multiple grooves. Each of the multiple grooves is provided with an oil sealing ring and a wear-resistant support pad. The upper part of the upper section of the positioning support plate and the lower part of the connecting plate are connected by a rotary sealing connection through the oil sealing ring and a rotary support connection through the wear-resistant support pad. The inner circumference of the first receiving cavity on the middle rotating support section of the rotating support housing is provided with a groove, and an oil sealing ring is provided in the groove. The outer circumference of the upper part of the positioning support base plate and the inner circumference of the first receiving cavity are rotatably sealed by the oil sealing ring. The lower end of the worm gear is provided with a groove, and a wear-resistant support pad is provided in the groove. The lower end of the worm gear and the upper end of the corresponding rotating support plate are rotatably supported and connected by the wear-resistant support pad. The inner circumference of the hole on the middle rotating support section of the rotating support housing is provided with a groove. There are multiple grooves, and each groove is provided with a dustproof sealing ring and a wear-resistant support pad. The outer circumference of the quick-connect assembly fixing seat and the inner circumference of the hole on the middle rotating support section of the rotating support housing are rotated and sealed by the dustproof sealing ring, and rotated and supported by the wear-resistant support pad.

9. The quick connector for excavators with a rotary positioning structure according to claim 8, characterized in that: A push-pull device protective plate is fixedly provided at the lower end of the middle rotating connection section of the quick-connect assembly.

10. The quick connector for excavators with a rotary positioning structure according to claim 9, characterized in that: The front and rear fixed sections of the rotary support housing are respectively fixed to the connecting base plate by screws. The upper part of the positioning support plate is locked and fixed to the worm gear by screws; The quick-connect assembly mounting base is locked to the worm gear by screws; The protective plate of the push-pull device is fixed to the lower end of the intermediate rotating connecting section of the quick-connect assembly by screws.

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