Large-tonnage hydraulic connector with rear insurance

Abstract

The utility model discloses a large-tonnage hydraulic connector with a rear insurance, which relates to the technical field of engineering machinery, and comprises a shell, a hydraulic cylinder, a movable hook, a front connecting shaft and a rear connecting shaft, one end of the shell is provided with a jaw, and a buffer insurance mechanism is arranged on the jaw in a matched manner; the buffering safety mechanism comprises a first rotating shaft and a rear safety block, the first rotating shaft is sleeved with a torsional spring, one end of the torsional spring acts on the rear safety block, a safety connecting rod is hinged to the top of the rear safety block, and a transition piece is hinged to the end, away from the rear safety block, of the safety connecting rod. The other end of the transition piece is connected with the shell through a shaft, and a damping device is further arranged on the transition piece. According to the rear safety block, the stress area of the front shaft and the shell is increased, abrasion is reduced, meanwhile, the buffering performance of the rear safety block is improved through the buffering safety mechanism, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering machinery, in particular to a large-tonnage hydraulic connector with a rear insurance. Background Art

[0002] At present, the connectors installed in large-tonnage excavators with a tonnage of more than 60 tons are subject to great forces. The shell of the traditional hydraulic connector with a movable hook that moves from the back to the front is limited by the thickness of the plate. The force area of ​​the front axle is small, the unit pressure ratio is large, and the degree of shell wear or cracking is very high. Taking the traditional push and double insurance type connectors as an example, this type is not suitable for use in large-tonnage excavators.

[0003] The existing utility model patent with the announcement number CN 218264037 U and the announcement date 2023.01.10 discloses a double insurance connector for an excavator, including an outer shell, the two ends of the outer shell are closed and the middle is a hollow structure, a clamping groove is formed at one end below the outer shell, and a fixed hook is formed at the other end below the outer shell, and a movable hook is fixed to one end of the middle part of the outer shell near the clamping groove through a pin shaft, a first oil cylinder shaft is rotatably installed on one side of the movable hook, and a fixed sleeve is formed at the position of the middle part of the outer shell near the fixed hook. The patent provides steps of different heights on the movable hook to meet the installation and fixation of auxiliary devices with different center distances; not only a safety rod mechanism is provided on the movable hook side, but also a safety lock block is provided on the fixed hook side. The design of the safety rod and the safety lock block avoids the falling of auxiliary components, reduces the occurrence of safety accidents, and plays a double protection role, making the connector safer and more reliable when used;

[0004] However, this patent also exposes an obvious shortcoming: when the front axle of the attachment is installed in the clamping groove 15, the width of the force-bearing area on the shell after the front axle is subjected to force during operation is only two plate thicknesses, and the force-bearing point will quickly wear or crack after being subjected to force for a long time;

[0005] At the same time, for conventional connectors with rear insurance, the rear insurance is mostly triggered and closed by a movable hook and is normally opened by a torsion spring. The insurance block has no buffer structure. In the event of misoperation of the insurance device, the insurance structure or related components may be damaged.

[0006] Therefore, the utility model proposes a large-tonnage hydraulic connector with a rear insurance to solve the above technical problems, thereby increasing the force-bearing area between the front axle and the housing, reducing wear, and at the same time improving the buffering effect of the rear insurance on external forces and extending the service life. Utility Model Content

[0007] In view of the above technical problems, the utility model provides a large-tonnage hydraulic connector with a rear safety, which is used to solve the problems of the existing large-tonnage connector having a small force-bearing area of ​​the front axle on the shell causing severe wear and the rear safety having no buffer structure causing damage to related components.

[0008] The above technical objectives of the utility model are achieved through the following technical solutions:

[0009] A large-tonnage hydraulic connector with a rear insurance includes a housing, a hydraulic cylinder, a movable hook, a front connecting shaft, and a rear connecting shaft, and is characterized in that: a tiger's mouth is provided at one end of the housing, and a buffer insurance mechanism is provided on the tiger's mouth;

[0010] The other end of the shell is axially connected to a movable hook, and a fitting block is provided on the opposite side of the shell to the movable hook, and the length of the fitting block is not less than the width of the shell;

[0011] The buffer safety mechanism comprises a first rotating shaft and a rear safety block, wherein the rear safety block is arranged above the base of the thumb through the first rotating shaft, a torsion spring is sleeved on the first rotating shaft, one end of the torsion spring acts on the rear safety block, a safety connecting rod is hinged on the top of the rear safety block, a transition piece is hinged on one end of the safety connecting rod away from the rear safety block, the other end of the transition piece is connected to the housing shaft, and a damping device is also arranged on the transition piece;

[0012] A trigger boss is arranged on the top of the movable hook, and the trigger boss can act on the damping device when the movable hook rotates, and provide thrust for the safety connecting rod.

[0013] Furthermore, a limit block is provided on the housing within the rotation radius of the rear safety block.

[0014] Furthermore, the damping device includes a guide sleeve, a trigger head, a damping push rod, a damping spring, and a connecting arm. One end of the connecting arm is a cavity structure, a damping spring is arranged in the cavity, a damping push rod is arranged in the cavity at one end of the damping spring, and a trigger head is arranged at one end of the damping push rod away from the damping spring. The guide sleeve is arranged on the outside of the connecting arm and the trigger head.

[0015] Furthermore, at least one fixing plate is provided in parallel on the outer wall of the guide sleeve, and the guide sleeve is fixed to the inner wall of the shell through the fixing plate.

[0016] Furthermore, one end of the rear safety block close to the base of the thumb is an arc-shaped structure.

[0017] Furthermore, a connecting shaft is provided at a position of the movable hook near the trigger boss, the output end of the hydraulic cylinder is connected to the connecting shaft, and a second rotating shaft is provided below the movable hook, and the movable hook is connected to the housing through the second rotating shaft.

[0018] Furthermore, ribs are provided between the two ends of the fitting block and the shell.

[0019] In summary, the beneficial technical effects of the utility model are:

[0020] (1) The bonding block is used to increase the force area when the front axle and the housing act, reducing the wear of the front axle. At the same time, the damping device is used to control the opening of the rear safety block through the safety link, so that the rear safety block has a certain buffering and shock absorption capacity, which indirectly reduces the rigidity of the rear safety block when it contacts other objects, and can absorb and buffer the external force to a certain extent, effectively protecting other related components and extending the service life.

[0021] (2) By utilizing the trigger boss on the movable hook to link the trigger head on the damping device, the movable hook and the rear safety block can be opened synchronously, avoiding the need to separately set a trigger device for the damping device, thereby reducing the design difficulty and manufacturing cost of the connector.

[0022] (3) Using a damping device instead of a rigid straight rod can ensure that when the rear safety block cannot rotate due to external force, the trigger boss on the movable hook can act on the trigger head on the damping device to achieve linkage, thereby compressing the damping spring to play a buffering role, and will not cause extrusion or twisting damage to other parts associated with the rear safety block.

[0023] (4) The rear safety link and the connecting arm are respectively provided with two connection points on the transition piece to ensure that the rotation stroke of the rear safety block is large and the rotation stroke of the trigger boss on the movable hook is small, so that the rear safety block can be triggered to start to move only when the movable hook is opened to the maximum stroke, thereby improving sensitivity and reducing the risk of the rear safety being retracted due to misoperation of the movable hook in the working state.

[0024] (5) The torsion spring is used to provide the rear safety block with an outward, variable dynamic support force, ensuring that the rear safety block always acts on the rear axle after being opened, effectively preventing the rear axle from falling off. At the same time, the limit block is used to prevent the rear safety block from rotating too much under the action of the torsion spring and losing its effect on the front axle. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a structural schematic diagram of the utility model from another angle;

[0027] Figure 3 It is a schematic diagram of the structure of the shell;

[0028] Figure 4 yes Figure 1 The schematic diagram of the shell is hidden;

[0029] Figure 5 is a schematic diagram of the internal structure of the damping device;

[0030] Figure 6It is a working schematic diagram of the utility model;

[0031] Figure 7 It is a schematic diagram of the internal principle of the utility model when it is working.

[0032] Figure numerals: 1. housing; 2. hydraulic cylinder; 3. movable hook; 4. front connecting shaft; 5. rear connecting shaft; 6. tiger's mouth; 7. fitting block; 8. first rotating shaft; 9. second rotating shaft; 10. rear safety block; 11. torsion spring; 12. safety link; 13. transition piece; 14. guide sleeve; 15. trigger head; 16. damping push rod; 17. damping spring; 18. connecting arm; 19. trigger boss; 20. limit block; 21. anti-rotation part; 22. connecting shaft; 23. rib plate; 24. fixing plate; 25. front axle; 26. rear axle. DETAILED DESCRIPTION

[0033] The present invention will be described clearly and completely below in conjunction with the embodiments.

[0034] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0035] In the description of the embodiments, unless otherwise clearly specified and limited, the terms "disposed", "connected" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or it can be connected through an intermediate medium, or it can be a communication between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0036] See attached Figure 1-5The large-tonnage hydraulic connector with rear insurance shown in the figure includes a housing 1, a hydraulic cylinder 2, a movable hook 3, a front connecting shaft 4, and a rear connecting shaft 5. The housing 1 is an integrally formed structure, and a front connecting shaft 4 and a rear connecting shaft 5 for connecting with an excavator are arranged in parallel on its top. A tiger's mouth 6 for installing a rear axle 26 is opened at one end of the housing 1. A first rotating shaft 8 is arranged above the tiger's mouth 6 of the housing 1. A rear insurance block 10 for preventing the rear axle 26 from falling off is rotatably arranged on the first rotating shaft 8. At the same time, a torsion spring 11 is mounted on the first rotating shaft 8, and one end of the torsion spring 11 abuts against Acting on the rear insurance block 10, the torsion spring 11 is used to exert an outward supporting force on the rear insurance block 10, so that the rear insurance block 10 can be always stretched outward by the torsion spring 11 during the connection process of the rear axle 26 to prevent the rear axle 26 from falling off. The top of the rear insurance block 10 is hinged with a safety link 12, and the end of the safety link 12 away from the rear insurance block 10 is hinged with a transition piece 13, and the end of the transition piece 13 away from the safety link 12 is axially connected to the housing 1, and the middle part of the transition piece 13 is connected to a damping device, which specifically includes a transition piece 13 and a damping device. The connecting arm 18 is connected to the connecting arm 13, and one end of the connecting arm 18 is a cavity structure, in which a damping spring 17 is arranged, and one end of the damping spring 17 is provided with a damping push rod 16, and the end of the damping push rod 16 away from the damping spring 17 is provided with a trigger head 15, and the trigger head 15 is specifically a round rod, and the diameter of the trigger head 15 is larger than the diameter of the connecting arm 18, so that the trigger head 15 can be guaranteed to have a larger force contact area, and the outer periphery of the connecting arm 18 is also provided with a guide sleeve 14, and two fixing plates 24 are arranged in parallel on the outer wall of the guide sleeve 14. The entire damping device The rear safety block 10 is fixed to the inner wall of the housing 1 by the fixing plate 24. When the rear safety block 10 is subjected to an external impact force such as a collision during use, the rear safety block 10 can transmit the impact force to the damping device by using the safety link 12. The damping device can absorb and buffer the impact force by using the damping spring 17, thereby changing the rigid contact between the rear safety block 10 and other objects into a flexible contact, which can maximize the shock absorption and buffering effect, thereby protecting other related components from damage, thereby extending the service life;

[0037] The other end of the shell 1 is provided with a movable hook 3, and the movable hook 3 is provided with a second rotating shaft 9. The movable hook 3 is rotatably connected to the shell 1 through the second rotating shaft 9. At the same time, the movable hook 3 is provided with a connecting shaft 22, and the output end of the hydraulic cylinder 2 is connected to the movable hook 3 through the connecting shaft 22. The shell 1 is provided with a mounting opening on the opposite side of the movable hook 3, and a fitting block 7 is fixedly provided in the mounting opening. The length of the fitting block 7 is not less than the width of the shell 1. When the front axle 25 is installed, the front axle 25 is located between the movable hook 3 and the fitting block 7, and the outer wall of the front axle 25 can be abutted and fitted with one side of the entire fitting block 7. In this way, the fitting block 7 is used to increase the force-bearing area of ​​the front axle 25 on the shell 1, thereby avoiding the problem that the force-bearing area of ​​the front axle 25 described in the background technology is only the size of two plate thicknesses of the shell 1, thereby effectively reducing the wear of the front axle 25 when it is stressed and preventing it from breaking;

[0038] At the same time, a trigger boss 19 is provided on the top of the movable hook 3. When in use, the hydraulic cylinder 2 is used to control the movable hook 3 to rotate clockwise to open. When the movable hook 3 rotates, when the trigger boss 19 abuts against the end of the trigger head 15, the trigger head 15 will be further compressed into the cavity of the connecting arm 18. At this time, the connecting arm 18 drives the safety link 12 to move forward under the action of the damping spring 17. The safety link 12 will further act on the rear safety block 10 to rotate clockwise along the first rotating shaft 8 to be recovered in the housing 1. At this time, the movable hook 3 and the rear safety block 10 are both opened, so as to facilitate the installation of the front axle 25 and the rear axle 26.

[0039] Furthermore, in order to prevent the rear safety block 10 from rotating excessively under the action of the torsion spring 11, a rotation stopper 21 is provided at the top of the rear safety block 10, and a limit block 20 is provided at the position where the rotation stopper 21 passes through the housing 1. When the rear safety block 10 rotates counterclockwise, the rotation stopper 21 abuts against the limit block 20 and stops rotating, so that the rear axle 26 can be effectively limited to prevent it from falling off.

[0040] Furthermore, the rear safety block 10 is located at one end interacting with the rear axle 26 and has an arc-shaped structure. The arc-shaped structure prevents the rear safety block 10 from interfering with normal rotation due to redundant structures when the rear axle 26 is removed.

[0041] Please refer to the attached Figure 6-7As shown, when installing the attachment, the hydraulic cylinder 2 is first used to control the movable hook 3 to rotate clockwise along the second rotating shaft 9. When the movable hook 3 rotates, after the trigger boss 19 on the top abuts against the trigger head 15, the trigger boss 19 will exert a thrust on the trigger head 15. The trigger head 15 will act on the damping push rod 16 to slide into the cavity of the connecting arm 18 through this thrust. In this process, the damping push rod 16 will further compress the damping spring 17. When the damping spring 17 is compressed, it will drive the transition piece 13 to rotate clockwise. When the transition piece 13 rotates, it will push the safety link 12 Applying a forward thrust, the safety link 12 will further rotate the rear safety block 10 clockwise along the first rotating shaft 8 and retract it into the housing 1. At this time, the movable hook 3 and the rear safety block 10 are in an open state. Then, the excavator is used to place the rear axle 26 of the attachment in the tiger's mouth 6, and then the movable hook 3 is controlled to rotate counterclockwise by the hydraulic cylinder 2. At this time, the rear safety block 10 rotates counterclockwise under the action of the torsion spring 11 and abuts against the rear axle 26. As the movable hook 3 rotates, the front axle 25 is also placed between the movable hook 3 and the fitting block 7, thereby realizing the installation of the front axle 25 and the rear axle 26.

[0042] Finally, it should be noted that the utility model increases the force-bearing area of ​​the front axle 25 on the shell 1 through the fitting block 7, so that the force of the shell 1 on the front axle 25 is more uniform, avoiding concentrated force, thereby reducing the wear of the front axle 25. At the same time, the use of the damping device not only achieves the purpose of opening through the movable hook 3, but also avoids the need to add a trigger device, simplifies the structure of the entire connector, makes maintenance more convenient and lowers the cost. More importantly, it can play a good shock-absorbing and buffering role on the rear safety block 10, indirectly protects the components associated with it, and prolongs its service life.

[0043] The above description is only a preferred specific implementation method of the present utility model, and does not limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A large-tonnage hydraulic connector with a rear safety device comprises a housing (1), a hydraulic cylinder (2), a movable hook (3), a front connecting shaft (4), and a rear connecting shaft (5), and is characterized in that: One end of the housing (1) is provided with a jaws (6), and a buffer safety mechanism is provided on the jaws (6); The other end of the shell (1) is axially connected to a movable hook (3); the shell (1) is provided with a fitting block (7) on the opposite side of the movable hook (3); the length of the fitting block (7) is not less than the width of the shell (1); The buffer safety mechanism comprises a first rotating shaft (8) and a rear safety block (10), wherein the rear safety block (10) is arranged above the jaws (6) via the first rotating shaft (8), a torsion spring (11) is sleeved on the first rotating shaft (8), one end of the torsion spring (11) acts on the rear safety block (10), a safety link (12) is hingedly connected to the top of the rear safety block (10), an end of the safety link (12) away from the rear safety block (10) is hingedly connected to a transition piece (13), the other end of the transition piece (13) is connected to the shaft of the housing (1), and a damping device is also provided on the transition piece (13); A trigger boss (19) is provided on the top of the movable hook (3), and the trigger boss (19) can act as a damping device when the movable hook (3) rotates, and provide thrust for the safety link (12).

2. The large-tonnage hydraulic connector with rear insurance according to claim 1 is characterized in that: The housing (1) is provided with a limit block (20) within the rotation radius of the rear safety block (10).

3. The large-tonnage hydraulic connector with rear insurance according to claim 1, characterized in that: The damping device comprises a guide sleeve (14), a trigger head (15), a damping push rod (16), a damping spring (17), and a connecting arm (18); one end of the connecting arm (18) is a cavity structure, a damping spring (17) is arranged in the cavity, a damping push rod (16) is arranged at one end of the cavity located at the damping spring (17), and the trigger head (15) is sleeved on one end of the damping push rod (16) away from the damping spring (17); the guide sleeve (14) is sleeved on the outside of the connecting arm (18) and the trigger head (15).

4. The large-tonnage hydraulic connector with rear insurance according to claim 3 is characterized in that: At least one fixing plate (24) is arranged parallel to the outer wall of the guide sleeve (14), and the guide sleeve (14) is fixed to the inner wall of the housing (1) via the fixing plate (24).

5. The large-tonnage hydraulic connector with rear insurance according to claim 1, characterized in that: One end of the rear safety block (10) close to the base of the thumb (6) is an arc-shaped structure.

6. The large-tonnage hydraulic connector with rear insurance according to claim 1, characterized in that: The movable hook (3) is provided with a connecting shaft (22) at a position close to the trigger boss (19); the output end of the hydraulic cylinder (2) is connected to the connecting shaft (22); the movable hook (3) is provided with a second rotating shaft (9) below the connecting shaft (22); and the movable hook (3) is connected to the housing (1) via the second rotating shaft (9).

7. The large-tonnage hydraulic connector with rear insurance according to claim 1, characterized in that: Ribs (23) are provided between the two ends of the fitting block (7) and the shell (1).

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