Quick connecting device and engineering machinery

Abstract

The invention relates to a quick connecting device and engineering machinery, the quick connecting device is used for connecting a machine tool (101) to an installation base body (104), the machine tool (101) comprises a first machine tool pin shaft (102) and a second machine tool pin shaft (103) which extend in the preset direction (x), the quick connecting device comprises at least one of a first locking component (1) and a second locking component (2), and the first locking component (1) is connected with the second locking component (2). The first locking component (1) is used for locking the first machine tool pin shaft (102) and has a first locking state and a first unlocking state which can be automatically switched, and the second locking component (2) is used for locking the second machine tool pin shaft (103) and has a second locking state and a second unlocking state which can be automatically switched.

Description

[0001] Cross-references to related applications

[0002] This disclosure is based on application number 202310637645.5， Application date is May 31, 2023 The disclosure of this application is based on and claims priority from the Chinese application, and the disclosure content of this Chinese application is hereby introduced into the present disclosure as a whole. Technical Field

[0003] The present disclosure relates to the technical field of engineering machinery, and in particular to a quick connection device and engineering machinery. Background Art

[0004] As the most commonly used construction machinery in daily construction, excavators undertake a variety of operating functions. The application of multifunctional tools is becoming more and more extensive. The quick connection device, as the connection structure between the excavator and the tool, realizes the rapid switching and installation of various tools, expands the scope of use of the excavator, saves time and manpower waste caused by replacing the attachments and disassembling the pin shaft, and improves work efficiency.

[0005] The most commonly used quick-connect device is a hydraulic quick-connect device, which uses a hydraulic cylinder to drive a locking mechanism to achieve connection and separation with the machine. The connector includes a fixed hook and a movable hook. After the fixed hook hooks one pin of the machine, the hydraulic cylinder drives the movable hook to hook the other pin of the machine. The operator needs to manually insert the safety pin from the side to lock the movable hook, thereby completing the connection of the machine. However, in actual use, it is found that this type of quick-connect device has poor safety and sometimes causes the machine to fall off due to operating errors or failure of the hydraulic system during the operation. Summary of the invention

[0006] The embodiments of the present disclosure provide a quick connection device and an engineering machine, which can improve the safety of the connection between the machine and the installation base.

[0007] According to one aspect of the present disclosure, a quick connection device is proposed for connecting a tool to a mounting base, the tool comprising a first tool pin and a second tool pin extending along a preset direction, the quick connection device comprising at least one of a first locking component and a second locking component, the first locking component being used to lock the first tool pin and having a first locking state and a first unlocking state that can be automatically switched, the second locking component being used to lock the second tool pin and having a second locking state and a second unlocking state that can be automatically switched.

[0008] In some embodiments, the quick connection device further includes a first lock hook and a first locking component, wherein the first end of the first lock hook is rotatably connected to a first pin extending along a preset direction, and the second end of the first lock hook is used to engage with the first tool pin in a first locking state, and the first locking component includes:

[0009] A locking hook, wherein the first end of the locking hook is rotatably connected to a second pin extending in a preset direction, and the second end of the locking hook is used to engage with the first end of the first locking hook in a first locking state; and

[0010] A gravity block, wherein the first end of the gravity block is rotatably connected to the second pin shaft, and the gravity block is used to keep the locking hook in a locked position when the quick connecting device is rotated to a first angle range. The locking hook tends to separate from the first locking hook due to the action of gravity within the first angle range, and the weight of the gravity block is greater than that of the locking hook.

[0011] In some embodiments, at least one of the first end of the locking hook and the first end of the gravity block is provided with a limiting portion for limiting the second end of the gravity block to rotate in a direction away from the first pin shaft to an extreme position;

[0012] Optionally, the limiting portion is disposed between the locking hook and the gravity block, and the gravity block and the limiting portion are pressed against each other within the first angle range.

[0013] In some embodiments, the quick connection device further includes a first limiting member for limiting the second end of the gravity block to rotate to an extreme position close to the first pin axis.

[0014] In some embodiments, the locking hook includes a hook body and a hook claw connected to form an L-shaped structure, the hook body is connected to the second pin, and the hook claw is used to engage with the first locking hook, wherein:

[0015] The position where the locking hook rotates to the point where the hook body is upward and the center of gravity of the locking hook initially deviates from the self-balance in a direction away from the first pin is the first critical position, the position where the locking hook rotates to the point where the hook body is upward and the equivalent center of gravity of the locking hook and the gravity block initially deviates from the self-balance in a direction away from the first pin is the second critical position, and the first angle range is the angle range between the first critical position and the second critical position; and / or

[0016] The position where the locking hook rotates to the point where the hook body is upward and the equivalent center of gravity of the locking hook and the gravity block initially deviates from the self-balance in a direction away from the first pin axis is the second critical position, and the position where the locking hook rotates to the point where the hook body is downward and the center of gravity of the locking hook initially deviates from the self-balance in a direction close to the first pin axis is the third critical position. The angle range between the second critical position and the third critical position is the second angle range. In the first unlocked state, the quick connecting device is within the second angle range, and in the first locked state, the quick connecting device is outside the second angle range.

[0017] In some embodiments, the quick connection device further includes a first linear drive component, a first end of which is connected to the first locking hook, and the first linear drive component is used to drive the first locking hook and the first tool pin to achieve engagement and separation.

[0018] In some embodiments, the quick connection device further comprises a second locking hook and a second locking component, the second locking component is used to lock the second tool pin to the second locking hook, and the second locking state is independent of the state of the first locking component.

[0019] In some embodiments,

[0020] In a preset direction, the first locking component and the second locking component are arranged side by side; and / or

[0021] The quick connection device also includes a shell, and a protrusion is provided in the area of ​​the shell near the first tool pin shaft. The protrusion is arranged on the movement trajectory of the first tool pin shaft to prevent the first tool pin shaft from disengaging. The movement trajectory of the first tool pin shaft disengaging is an arc with the second tool pin shaft as the center.

[0022] In some embodiments, the quick connection device further comprises a housing, and the second locking component comprises:

[0023] A third pin shaft extends along a preset direction;

[0024] A locking block is rotatably connected to the third pin shaft, and in the second locking state, the locking block is in a first position, and in the first position, a first end of the locking block abuts against the second tool pin shaft to prevent the second tool pin shaft from being separated from the second locking hook;

[0025] A second limiting member, used for limiting the first end of the locking block to rotate in a direction away from the first tool pin shaft to an extreme position; and

[0026] The first elastic member is connected between the locking block and the housing, and is used for applying an elastic force to the locking block to rotate toward the direction close to the second limiting member.

[0027] In some embodiments, the quick connection device further includes a housing and a fourth pin extending in a preset direction, a slideway is provided on the housing, the fourth pin is movably connected to the housing along the slideway, the locking block further includes a locking groove, the fourth pin is provided in the locking groove and the fourth pin abuts against an inner wall of the locking groove;

[0028] Among them, the movement of the fourth pin shaft is used to drive the locking block to rotate around the third pin shaft. When the fourth pin shaft moves along the slide from one end of the lock groove close to the third pin shaft to the end of the lock groove away from the third pin shaft, the second locking component switches from the second locked state to the second unlocked state.

[0029] In some embodiments, wherein in the second unlocked state, the locking block rotates to a second position, in which the first end of the locking block is spaced apart from the fall-off path of the second implement pin;

[0030] Optionally, the quick connection device further comprises a housing, and the second locking component further comprises:

[0031] The first elastic member is connected between the locking block and the housing, and is used to apply an elastic force to the locking block to rotate toward the second limiting member. The elastic force of the first elastic member at the first position of the locking block is smaller than that at the second position.

[0032] In some embodiments, the quick connection device further includes a first linear drive component and a third limiter, wherein the first end of the first linear drive component is connected to the first lock hook, the second end of the first linear drive component is connected to the fourth pin shaft, and the third limiter is used to limit the first lock hook to an extreme position of rotation in a direction away from the first tool pin shaft;

[0033] When the first locking component is in the first unlocking state and the first linear driving component is contracted to a preset length, the first locking hook abuts against the third limiting component, and the first linear driving component continues to contract to drive the fourth pin to move along the slideway.

[0034] In some embodiments, the quick connection device includes a second locking component, a first locking hook, a second locking hook, a housing and a first linear driving component, a slideway is provided on the housing, and the second locking component includes:

[0035] A third pin shaft extends along a preset direction;

[0036] A locking block rotatably connected to the third pin shaft, the locking block comprising a locking groove, in the second locking state, the locking block is in the first position, the first end of the locking block abuts against the second tool pin shaft to prevent the second tool pin shaft from being separated from the second locking hook; and

[0037] A fourth pin shaft extends in a preset direction, is disposed in the lock slot and abuts against the inner wall of the lock slot, and is movably connected to the housing along the slideway. In a first position, the fourth pin shaft abuts against one end of the lock slot close to the third pin shaft;

[0038] The first end of the first linear drive component is connected to the fourth pin shaft, the second end of the first linear drive component is connected to the first lock hook, and the first linear drive component is configured to rotate and maintain the locking block in the first position by extending, and to engage the first lock hook with the first tool pin shaft, thereby reaching the second locking state;

[0039] Optionally, the locking groove is in the shape of an oblong, an arc or a triangle.

[0040] In some embodiments, when the fourth pin moves along the slide from one end of the lock groove close to the third pin to one end away from the third pin, the locking block rotates from the first position to the second position, and the second locking component switches from the second locked state to the second unlocked state. In the second position, the first end of the locking block is separated from the falling path of the second tool pin.

[0041] In some embodiments, during the process of switching from the second locked state to the second unlocked state, F1*lc>F2*ld is satisfied;

[0042] Among them, F1 is the pressure of the fourth pin shaft on the inner side of the lock groove, lc is the perpendicular distance from the center of the third pin shaft to the straight line extending in the direction of F1, F2 is the friction force between the fourth pin shaft and the inner side of the lock groove, and ld is the distance between the center of the third pin shaft and the force application point of the fourth pin shaft on the inner side of the lock groove.

[0043] In some embodiments, the quick connection device further includes a third limiter for limiting the extreme position of the first lock hook rotating in a direction away from the first tool pin shaft. When the first linear drive component is retracted to a preset length, the first lock hook abuts against the third limiter, and the first linear drive component continues to retract to drive the fourth pin shaft to move along the slideway in a direction away from the third pin shaft, so that the locking block rotates from the first position to the second position; and / or

[0044] The second locking component also includes: a first elastic member connected between the locking block and the housing, used to apply an elastic force to the locking block to keep it in the first position, and the elastic force of the first elastic member at the first position of the locking block is smaller than that at the second position.

[0045] In some embodiments, the quick connection device further includes a first locking component and a first pin extending in a preset direction, the first end of the first locking hook is rotatably connected to the first pin, the second end of the first locking hook is connected to the second end of the first linear driving component, and the first locking component includes:

[0046] The second elastic member is sleeved on the first linear drive component, and the two ends of the second elastic member are respectively against the first end and the second end of the first linear drive component and the second elastic member is in a compressed state in the first locking state to keep the first linear drive component in an extended state.

[0047] In some embodiments, the second end of the locking block is provided with a groove, which is configured to abut against the second tool pin shaft when the first linear drive component fails and the elastic force of the second elastic member is insufficient, so as to prevent the second tool pin shaft from disengaging from the second locking hook; and / or

[0048] The first locking hook includes an extension portion protruding from the hook claw portion of the first locking hook to accommodate the first tool pin when the first linear drive component fails and the elastic force of the second elastic member is insufficient to prevent the first tool pin from disengaging from the first locking hook.

[0049] In some embodiments, the quick connection device further includes a fourth stopper configured to abut against the locking block in the second locking state to keep the locking block in the first position, and the fourth stopper includes:

[0050] A sixth pin shaft extends along a preset direction;

[0051] The first section is rotatably connected to the sixth pin shaft, and one end of the first section away from the sixth pin shaft abuts against the locking block in the second locking state;

[0052] A second section fixedly connected to the first section and rotatably connected to the sixth pin; and

[0053] a third elastic member configured to fix a position of at least one of the first section and the second section in a second locked state;

[0054] In the process of switching from the second locked state to the second unlocked state, the first lock hook contacts the end of the second section away from the sixth pin shaft, and causes the second section to rotate around the sixth pin shaft, so that the first section rotates in a direction away from the third pin shaft.

[0055] According to another aspect of the present disclosure, a construction machine is provided, comprising a mounting base, a machine tool and the quick connection device of the above embodiment, wherein the quick connection device connects the machine tool to the mounting base;

[0056] Optionally, the construction machinery is an excavator, the machine tool includes a bucket, the mounting base includes a boom and a connecting rod, the bucket is connected to the first end of the boom and the first end of the connecting rod through a quick connection device, and the second end of the connecting rod is rotatably connected to the boom through a rocker arm.

[0057] Based on the above technical solution, the quick connection device of the disclosed embodiment does not require manual locking of the pin, which can reduce the falling of the equipment caused by operating errors during operation and save time, thereby improving operation safety and efficiency; the operator can lock and unlock the equipment in the cab, which can reduce the difficulty of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present application. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0059] Figure 1 It is a schematic structural diagram of some embodiments of the quick connection device of the present disclosure connected to a machine tool and a mounting base.

[0060] Figure 2 It is a schematic structural diagram of the first embodiment of the quick connection device disclosed in the present invention.

[0061] Figure 3 It is a partial structural schematic diagram of some embodiments of the first locking component of the quick connection device disclosed in the present invention.

[0062] Figure 4It is a schematic structural diagram of some embodiments of the quick connection device of the present invention, in which the locking hook is in the first critical position.

[0063] Figure 5 It is a schematic structural diagram of some embodiments of the quick connection device of the present invention, in which the locking hook is in the second critical position and the third critical position.

[0064] Figure 6 It is a structural schematic diagram of the second embodiment of the quick connection device disclosed in the present invention.

[0065] Figure 7 for Figure 6 Enlarged view of point C in .

[0066] Figure 8 It is a structural schematic diagram of the second embodiment of the quick connection device of the present disclosure in a first unlocked state and a second locked state.

[0067] Fig. 9 for Figure 8 Enlarged view of point D in .

[0068] Fig.10 It is a structural schematic diagram of the second embodiment of the quick connection device of the present disclosure in a first unlocked state and a second unlocked state.

[0069] Fig.11 for Fig.10 Enlarged view of point E in FIG.

[0070] Fig.12 It is a schematic diagram of the disengagement motion trajectory of the first tool pin of the quick connection device disclosed in the present invention.

[0071] Fig.13 for Fig.12 Enlarged view of point F in FIG.

[0072] Fig.14A and Fig. 14B The schematic diagrams are respectively schematic diagrams of the quick connection device and the machine during and after the installation.

[0073] Fig.15 It is a structural schematic diagram of the third embodiment of the quick connection device disclosed in the present invention.

[0074] Fig.16 It is a schematic structural diagram of a fourth embodiment of the quick connection device disclosed in the present invention.

[0075] Fig.17 It is a schematic structural diagram of other embodiments of the first locking hook, the second locking hook and the second locking component in the third embodiment of the quick connection device of the present disclosure.

[0076] Fig.18It is a schematic structural diagram of other embodiments of the first locking hook, the second locking hook and the second locking component in the fourth embodiment of the quick connection device of the present disclosure.

[0077] Fig.19 It is a structural schematic diagram of the fourth embodiment of the quick connection device of the present disclosure in a first unlocked state and a second locked state.

[0078] Fig. 20 It is a structural schematic diagram of the fourth embodiment of the quick connection device of the present disclosure in a first unlocked state and a second unlocked state.

[0079] Fig.21 This is a schematic structural diagram of the fourth embodiment of the quick connection device of the present disclosure when the first linear drive component fails and the elastic force of the second elastic member is insufficient.

[0080] Fig. 22 It is a schematic diagram of force analysis of the quick connection device of the present disclosure in the second locking state.

[0081] Fig.23 It is a schematic diagram of force analysis of the quick connection device of the present disclosure in the second unlocking state.

[0082] Fig.24 for Fig. 22 A schematic diagram of force analysis of an embodiment in which the locking groove is in an arc shape.

[0083] Fig.25 It is a schematic structural diagram of a fifth embodiment of the quick connection device disclosed in the present invention.

[0084] Fig.26 It is a structural schematic diagram of the fifth embodiment of the quick connection device of the present disclosure in a first unlocked state and a second locked state.

[0085] Fig. 27 It is a structural schematic diagram of the fifth embodiment of the quick connection device of the present disclosure in a first unlocked state and a second unlocked state.

[0086] Fig.28 It is a schematic structural diagram of the first tool pin shaft of the fifth embodiment of the present disclosure falling off under extreme working conditions.

[0087] Fig.29 for Fig.16 Schematic diagram of the structure of some embodiments of the quick connection device connected to the machine and the mounting base.

[0088] Fig.30 for Fig.18 Schematic diagram of the structure of some embodiments of the quick connection device connected to the machine and the mounting base.

[0089] Description of Reference Numerals

[0090] 1. first locking component; 11. first locking hook; 111. extension; 12. locking hook; 121. limiting part; 122. hook body; 123. hook claw; 13. gravity block; 14. second elastic member; 2. second locking component; 21. second locking hook; 22. locking block; 23. first elastic member; 24. locking slot; 25. groove; 3. shell; 31. protrusion; 32. slideway; 41. first limiting member; 42. second limiting member; 43. third limiting member; 44. fourth limiting member; 441. first section; 442. second section; 443. third elastic member; 51. first linear drive component; 52. second linear drive component; 61. first pin; 62. second pin; 63. third pin; 64. fourth pin; 65. fifth pin; 66. sixth pin; x. preset direction;

[0091] 101. Tool; 102. First tool pin; 103. Second tool pin; 104. Mounting base; 105. Arm; 106. Connecting rod; 107. Rocker arm. DETAILED DESCRIPTION

[0092] The present disclosure is described in detail below. In the following paragraphs, different aspects of the embodiments are defined in more detail. Each aspect so defined can be combined with any other aspect or aspects, unless explicitly stated not to be combined. In particular, any feature that is considered to be preferred or advantageous can be combined with one or more other features that are considered to be preferred or advantageous.

[0093] The terms "first", "second", etc. that appear in the present disclosure are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or a primary and secondary relationship.

[0094] In the description of the present disclosure, it is necessary to understand that the terms "upper", "lower", "inner" or "outer" etc. indicating directions or positional relationships are defined based on the driver or implement pin etc., and are only for the convenience of describing the present disclosure, and do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the scope of protection of the present disclosure.

[0095] First, the present disclosure provides a quick connection device. In some embodiments, Figures 1 to 30 As shown, the quick connection device is used to detachably connect the tool 101 to the mounting base 104. The tool 101 includes a first tool pin 102 and a second tool pin 103 extending along a preset direction x. For example, the tool 101 of the construction machinery is a working device, which can be a bucket, a breaker hammer or a hydraulic shear, etc. By replacing different tools 101, the functions of the construction machinery can be broadened. The following embodiments are described in part using a bucket as an example. The preset direction x can be the width direction of the tool 101. Figure 1 , 2 and Figure 4-30 In the figure, the preset direction x is the direction perpendicular to the paper surface.

[0096] The quick-connect device includes at least one of a first locking component 1 and a second locking component 2. The first locking component 1 is used to lock the first tool pin 102, and has a first locking state and a first unlocking state that can be automatically switched. The second locking component 2 is used to lock the second tool pin 103, and has a second locking state and a second unlocking state that can be automatically switched.

[0097] The quick connection device of this embodiment achieves locking and unlocking of the tool pin shaft through at least one of the first locking component 1 and the second locking component 2, and does not require manual locking. This can reduce the possibility of tool falling off due to operational errors during operation, save time, and improve operational safety and efficiency. The operator can lock and unlock the tool in the cab, reducing the difficulty of operation.

[0098] The inventors have found that the main reason why the hydraulic quick-connect device in the related art has poor safety is that the fixed hook (second lock hook 21) and the movable hook (first lock hook 11) have a limited range of engagement, and the engagement is not strong. The connecting pin shaft that the fixed hook (second lock hook 21) engages is in a semi-exposed state. After the movable hook (first lock hook 11) is connected to the connecting pin shaft of the machine, the operator needs to manually insert the safety pin from the side to ensure that the movable hook (first lock hook 11) is locked to prevent the operating device from falling off due to operating errors or failure of the hydraulic system during the operation. However, due to the manual insertion of the pin, the operator may forget to insert the pin and cause an accident, and the safety pin is easily lost when it is vacant for a long time. Therefore, this kind of quick-connect device requires manual operation, which is time-consuming, and if the locking system is damaged, it may cause accidents, and the safety is poor.

[0099] To solve the above problems, in some embodiments, Figures 1 to 14B As shown, the quick connection device also includes a first lock hook 11 and a first locking component 1. The first end of the first lock hook 11 is rotatably connected to the first pin 61 extending along the preset direction x, and the second end of the first lock hook 11 is used to engage with the first tool pin 102 in the first locking state. The first locking component 1 includes:

[0100] A locking hook 12, wherein the first end of the locking hook 12 is rotatably connected to a second pin 62 extending along a preset direction x, and the second end of the locking hook 12 is used to engage with the first end of the first locking hook 11 in a first locking state; and

[0101] The gravity block 13, the first end of the gravity block 13 is rotatably connected to the second pin shaft 62, the gravity block 13 is used to keep the locking hook 12 in the locked position when the quick connecting device is rotated to a first angle range, the locking hook 12 tends to separate from the first locking hook 11 under the action of gravity within the first angle range, and the weight of the gravity block 13 is greater than that of the locking hook 12.

[0102] Optionally, the first linear drive component 51 can be used to drive the second end of the first lock hook 11 to rotate around the first pin 61. Specifically, the first lock hook 11 can be hinged to the first linear drive component 51 through the fifth pin 65, and the fifth pin 65 extends along the preset direction x. More specifically, the first linear drive component 51 is extended to drive the second end of the first lock hook 11 to engage with the first tool pin 102. Specifically, the first locking component 1 can play a locking role when the first linear drive component 51 fails. Optionally, the first lock hook 11 can also be engaged with the first tool pin 102 in other ways.

[0103] Optionally, the first end of the first lock hook 11 may be provided with a snap-fit ​​block, which protrudes from the first end of the first lock hook 11 and is used to cooperate with the hook claw 123 of the locking hook 12, so that the second end of the locking hook 12 is snapped to the first end of the first lock hook 11 in the first locking state, for example, the hook claw 123 hooks the snap-fit ​​block of the first end of the first lock hook 11. Optionally, the second end of the locking hook 12 and the first end of the first lock hook 11 may be any structural shape that satisfies the snap-fit ​​state. Optionally, the shape and layout of the locking hook 12 and the gravity block 13 may be adjusted and selected according to space conditions, etc. Optionally, the quick connection device may further include a housing, and the rotating locking hook 12 may be provided on the housing.

[0104] Specifically, the locking hook 12 achieves locking and unlocking of the first locking hook 11 by gravity. Specifically, within the first angle range, the locking hook 12 can be restricted from moving in the direction of disengaging from the first locking hook 11 by the action of the gravity block 13. Specifically, the locking hook 12 cooperates with the gravity block 13 to expand the angle range of locking of the locking hook 12, or to reduce the angle range of unlocking. For example, in the absence of the gravity block 13, the locking hook 12 will disengage from the first locking hook 11 within the first angle range. However, by providing the gravity block 13 having a weight greater than that of the locking hook 12, the locking hook 12 can be reliably maintained in the position engaged with the first locking hook 11 within the first angle range by gravity, thereby improving the safety and reliability of the connection between the tool and the mounting base.

[0105] Specifically, outside the first angle range, two angle ranges can be divided, in one angle range, the locking hook 12 is engaged with the first tool pin 102 only by its own gravity, and in another angle range, such as the second angle range, the locking hook 12 can be separated from the first locking hook 11 to quickly unlock the first locking component. Specifically, the gravity block 13 can ensure the uniqueness of the unlocking area and improve the safety of the quick connection device.

[0106] Specifically, Figure 2 As shown, in normal working state, the first lock hook 11 rotates clockwise around the first pin 61 to clamp the first tool pin 102. When the first lock hook 11 loses power, the first lock hook 11 will rotate in the direction of release (counterclockwise) under the action of the first tool pin 102's own gravity. At this time, the locking hook 12 has a tendency to rotate counterclockwise around the second pin 62 under the action of gravity and is engaged with the first lock hook 11. The engagement method can be as follows: Figure 2 As shown in the A position, the two inclined surfaces are engaged with each other. At this time, the first lock hook 11 cannot be released, and the tool 101 is locked. When the quick connection device is rotated to a different position, the locking hook 12 is separated from the first lock hook 11 at the A position due to the change in the center of gravity position, thereby completing the unlocking. The gravity block 13 can control the locking hook 12 to remain connected to the first lock hook 11 within the first angle range to reduce the unlocking angle. The gravity size and center of gravity position of the gravity block 13 can effectively control the unlocking angle range.

[0107] The quick connection device of this embodiment does not require manual locking with a pin, which can reduce the possibility of equipment falling off due to operational errors during operation and save time, thereby improving operation safety and efficiency. The operator can lock and unlock the first locking component through gravity by controlling the rotation angle of the quick connection device, thereby quickly installing or replacing equipment. The operator can replace equipment in the cab, thereby reducing operation difficulty and improving efficiency. The locking hook is engaged with the first locking hook, and the gravity block is used to keep the locking hook in the locked position when the quick connection device is rotated to the first angle range, thereby expanding the locking angle range of the locking hook, improving the reliability of the connection between the equipment and the mounting base, and thereby improving the safety of construction machinery operations.

[0108] In some embodiments, Figure 3 As shown, at least one of the first end of the locking hook 12 and the first end of the gravity block 13 is provided with a limiting portion 121 for limiting the second end of the gravity block 13 to rotate to an extreme position away from the first pin shaft 61 .

[0109] Specifically, within the first angle range, the locking hook 12 has a tendency to unlock under the action of gravity, and the weight block 13 and the limiter 121 cooperate to prevent the unlocking tendency of the locking hook 12, so that the locking hook 12 remains in the locked position. Specifically, the second end of the weight block 13 rotates in a direction away from the first pin 61, that is, the weight block 13 rotates counterclockwise as shown in the figure. Specifically, the limiter 121 limits the extreme position of the rotation of the weight block 13, and the weight block 13 can also limit the extreme position of the rotation of the locking hook 12 in the opposite direction, so that the locking hook 12 has a tendency to rotate counterclockwise, or limits the locking hook 12 from rotating clockwise, that is, limits the locking hook 12 from rotating in the unlocking direction.

[0110] Specifically, within the first angle range, the torque generated by the gravity block 13 around the second pin shaft 62 is greater than the torque generated by the locking hook 12 around the second pin shaft 62. The torque generated by the gravity block 13 around the second pin shaft 62 can be determined by the gravity of the gravity block 13 and the center of gravity position of the gravity block 13. For example, the gravity of the gravity block 13 can be greater than the locking hook 12, or even if the gravity of the gravity block 13 is less than the locking hook 12, the torque generated by the gravity block 13 around the second pin shaft 62 can be greater than the torque generated by the locking hook 12 around the second pin shaft 62 by adjusting the center of gravity position of the gravity block 13.

[0111] Optionally, the limiting portion 121 may be a limiting block or a limiting shell, etc. For example, the limiting portion 121 may include a protruding area provided at the first end of the weight block 13 and a concave area provided at the first end of the locking hook 12, and when the protruding area and the concave area are squeezed at position B, the weight block 13 cannot be further rotated counterclockwise, but can be rotated clockwise. For another example, the limiting portion 121 is an arc-shaped shell structure connected to the locking hook 12, and when the first end of the weight block 13 abuts against the arc-shaped shell structure, it cannot be further rotated counterclockwise, but can be rotated clockwise.

[0112] This embodiment limits the second end of the gravity block to the extreme position of rotation away from the first pin axis through the limit part, and can limit the locking hook to rotate in the unlocking direction within the first angle range, thereby expanding the locking angle range of the locking hook, ensuring the uniqueness of the unlocking area, and improving the reliability and safety of the connection between the machine and the mounting base, thereby improving the safety of engineering machinery operations.

[0113] In some embodiments, Figure 3 As shown, the limiting portion 121 is disposed between the locking hook 12 and the gravity block 13 , and the gravity block 13 and the limiting portion 121 are pressed against each other within a first angle range.

[0114] Specifically, the limiting portion 121 can be provided on a side of the locking hook 12 close to the gravity block 13. Specifically, within the first angle range, the locking hook 12 has an unlocking tendency under the action of gravity, and the gravity block 13 and the limiting portion 121 squeeze each other to prevent the unlocking tendency of the locking hook 12, so that the locking hook 12 is kept in the locked position, and the locking hook 12 is restricted from rotating in the unlocking direction.

[0115] Optionally, the limiting portion 121 may be a limiting block or a limiting shell, etc. For example, the limiting portion 121 may include a protruding area provided at the first end of the weight block 13 and a concave area provided at the first end of the locking hook 12, and the protruding area and the concave area are pressed against each other at position B. For another example, the limiting portion 121 is an arc-shaped shell structure connected to the locking hook 12, and the weight block 13 at its first end and the arc-shaped shell structure are pressed against each other at position B.

[0116] This embodiment can limit the locking hook from rotating in the unlocking direction by squeezing the gravity block and the limiting portion against each other within the first angle range, thereby expanding the locking angle range of the locking hook, ensuring the uniqueness of the unlocking area, and improving the reliability and safety of the connection between the machine and the mounting base.

[0117] In some embodiments, Figures 1 to 12 As shown, the quick connection device further includes a first limit member 41 for limiting the second end of the gravity block 13 to rotate toward an extreme position close to the first pin shaft 61 .

[0118] Specifically, within some angle ranges, the second end of the weight block 13 has a tendency to rotate toward the direction close to the first pin 61 under the action of gravity, that is, a tendency to rotate clockwise. Specifically, the weight block 13 will be limited by the first limiter 41 when it rotates clockwise around the second pin 62 at a certain angle. The first limiter 41 can control the weight block 13 to rotate within a certain small range, and can more accurately control the range of motion of the weight block 13, so as to prevent the weight block 13 from affecting the free rotation of the locking hook outside the first angle range. Optionally, the first limiter 41 can be a stopper, a baffle, etc., and the first limiter 41 can be arranged on the housing.

[0119] This embodiment limits the second end of the gravity block to the extreme position of rotation toward the direction close to the first pin axis through the first limit member, which can more accurately control the movement range of the gravity block, prevent the gravity block from affecting the free rotation of the locking hook outside the first angle range, and improve the safety and reliability of the connection between the machine and the mounting base.

[0120] In some embodiments, Figures 1 to 14B As shown, the locking hook 12 includes a hook body 122 and a hook claw 123 connected to form an L-shaped structure, the hook body 122 is connected to the second pin 62, and the hook claw 123 is used to engage with the first locking hook 11;

[0121] Among them, the position where the locking hook 12 rotates to the point where the hook body 122 is upward and the center of gravity of the locking hook 12 initially deviates from the self-balance in the direction away from the first pin shaft 61 is the first critical position, the position where the locking hook 12 rotates to the point where the hook body 122 is upward and the equivalent center of gravity of the locking hook 12 and the gravity block 13 initially deviates from the self-balance in the direction away from the first pin shaft 61 is the second critical position, and the first angle range is the angle range between the first critical position and the second critical position.

[0122] Specifically, the hook claw 123 can cooperate with the engaging block protruding from the first end of the first locking hook 11, for example, the hook claw 123 hooks the engaging block, and the inclined surfaces of the two mesh with each other to achieve locking. Figure 4 The position shown in FIG. 1 is when the quick-connect device rotates to position a. The second critical position can be Figure 5 The position shown in the upper part, at this time, the quick connection device is rotated to position b. Specifically, Figure 4 The position a shown and Figure 5 The position b shown in the upper part is only a schematic position, and the first critical position and the second critical position of the locking hook 12 may be offset or changed according to the shape, center of gravity position, etc. of the locking hook 12.

[0123] Specifically, between position a and position b, i.e., within the first angle range, the locking hook 12 itself tends to be separated from the first locking hook 11 due to the effect of gravity, but the gravity block 13 can prevent the separation tendency and keep the locking hook 12 in the locked position. Specifically, if the quick connection device continues to rotate clockwise at position b, the equivalent center of gravity of the locking hook 12 and the gravity block 13 shifts toward the direction in which the locking hook 12 is separated, and the locking hook 12 is separated to complete the unlocking of the first locking component, so that the first locking component 1 switches from the first locked state to the first unlocked state.

[0124] The quick connection device of this embodiment is engaged with the first locking hook by the hook claw, and the locking hook is kept in the locked position by the gravity block when the quick connection device is rotated to the first angle range. It can expand the locking angle range of the locking hook, improve the reliability of the connection between the machine and the mounting base, and thus improve the safety of engineering machinery operations.

[0125] In some embodiments, Figures 1 to 14B As shown, the locking hook 12 includes a hook body 122 and a hook claw 123 connected to form an L-shaped structure, the hook body 122 is connected to the second pin 62, and the hook claw 123 is used to engage with the first locking hook 11;

[0126] Among them, the position where the locking hook 12 rotates to the point where the hook body 122 is upward and the equivalent center of gravity of the locking hook 12 and the gravity block 13 initially deviates from the self-balance in a direction away from the first pin shaft 61 is the second critical position, and the position where the locking hook 12 rotates to the point where the hook body 122 is downward and the center of gravity of the locking hook 12 initially deviates from the self-balance in a direction close to the first pin shaft 61 is the third critical position. The angle range between the second critical position and the third critical position is the second angle range. In the first unlocked state, the quick connecting device is within the second angle range, and in the first locked state, the quick connecting device is within the non-second angle range.

[0127] Specifically, the second critical position may be Figure 5 The position shown in the upper part, at this time, the quick connection device rotates to position b, and the third critical position can be Figure 5 The position shown in the lower part, at this time, the quick connection device is rotated to position c. Specifically, Figure 5 The positions b and c shown are only schematic positions. The second critical position and the third critical position of the locking hook 12 may be offset or changed according to the shape, center of gravity position, etc. of the locking hook 12 and the gravity block 13. In actual situations, the second angle range is less than Figure 5 Specifically, during the operation of the tool 101, most of the angles corresponding to the quick connection device are not within the second angle range.

[0128] Specifically, if the quick connecting device continues to rotate clockwise at position c, the center of gravity of the locking hook 12 shifts toward the direction close to the first pin shaft 61, and the locking hook 12 tends to rotate counterclockwise under the action of gravity, thereby locking the first locking component 1, so that the first locking component 1 switches from the first unlocked state to the first locked state.

[0129] The quick connection device of this embodiment can ensure the uniqueness of the unlocking area within the second angle range when the quick connection device is in the first unlocking state, thereby improving the safety of the connection between the machine and the mounting base; the operator can achieve the locking and unlocking of the first locking component by gravity by controlling the rotation angle of the quick connection device in the cab, thereby quickly installing or replacing the machine, which can reduce the difficulty of operation and improve efficiency.

[0130] In some embodiments, Figures 1 to 14B As shown, the quick connection device further includes a first linear drive component 51 , a first end of which is connected to the first lock hook 11 , and the first linear drive component 51 is used to drive the first lock hook 11 and the first tool pin 102 to achieve engagement and separation.

[0131] Specifically, the first end of the first linear drive component 51 is connected to the first lock hook 11 through the fifth pin 65. Optionally, the fifth pin 65 can be a hinge shaft. Specifically, when the first linear drive component 51 is extended, the first lock hook 11 can be engaged with the first tool pin 102. Optionally, the first linear drive component 51 can be a cylinder, an electric push rod, etc.

[0132] The operator of this embodiment can drive the first linear drive component in the cab to engage the first locking hook with the first tool pin, and then quickly install or replace the tool, which can achieve convenient operation and improve operational safety and efficiency.

[0133] In some embodiments, Figures 2 to 14B As shown, the quick connection device further includes a second locking hook 21 and a second locking component 2 . The second locking component 2 is used to lock the second tool pin 103 to the second locking hook 21 . The second locking state is independent of the state of the first locking component 1 .

[0134] This embodiment provides two independent locking systems, both of which are mechanical locks, and the locking and unlocking are independent. When the first locking component 1 is damaged or the first locking component 1 is in the first unlocking state, the second locking component 2 can still play a locking role, which can improve the reliability of the connection between the machine and the installation base and improve the safety of the construction machinery operation.

[0135] In some embodiments, Figures 1 to 14B As shown, in the preset direction x, the first locking component 1 and the second locking component 2 are arranged side by side.

[0136] Specifically, the first locking component 1 achieves locking in a large angle range through the cooperation of the locking hook 12 and the gravity block 13, and the second locking component 2 achieves locking through a locking mechanism such as the locking block 22 of the following embodiment. These two sets of locking structures are located on both sides of the quick connecting device and can be structurally independent of each other, thereby improving the reliability of locking and unlocking. Moreover, the side-by-side arrangement makes it easy to layout the first locking component 1 and the second locking component 2.

[0137] In some embodiments, Figures 1 to 14B As shown, the quick connection device also includes a shell 3, and a protrusion 31 is provided in the area of ​​the shell 3 near the first tool pin 102. The protrusion 31 is arranged on the movement trajectory of the first tool pin 102 to prevent the first tool pin 102 from disengaging. The movement trajectory of the first tool pin 102 is an arc with the second tool pin 103 as the center.

[0138] Specifically, the movement trajectory d of the first tool pin 102 to be disengaged can be as follows: Fig.12 and Fig.13By providing the protrusion 31 on the housing 3, in special circumstances such as failure of the driving component and failure of the first locking component 1, the protrusion 31 can still prevent the first tool pin 102 from being disengaged, ensuring that the first tool pin 102 and the quick connection device are not separated, thereby improving the reliability of the connection between the tool and the mounting base.

[0139] Specifically, Fig.12 and Fig.13 As shown, since the first locking component 1 and the second locking component 2 are independent of each other, when the first locking component 1 is damaged, the second locking component 2 still plays a locking role, that is, the second locking component 2 is in the second locking state. Therefore, even if the first locking component 1 fails, the movement trajectory d of the first tool pin 102 is an arc with the second tool pin 103 as the center.

[0140] More specifically, in order to illustrate that the protrusion 31 does not interfere with the combination of the quick connection device and the tool 101, Fig.12 and Fig.13 The schematic diagram of the installation process of the implement 101 (bucket) of the quick connection device shown in FIG. Fig.14A As shown in FIG. 1 , the bucket has been fitted with the quick-connect device, but the first implement pin 102 and the second implement pin 103 have not yet been installed in place. Fig. 14B As shown, under the action of the oil cylinder, the first locking hook 11 pushes the bucket to the position, that is, the bucket and the quick connection device are installed in place. Fig.14A and Fig. 14B The schematic diagram of the installation process shows that the protrusion 31 does not affect the installation of the tool 101. The protrusion 31 can prevent the first tool pin 102 from being separated from the quick connection device due to the first locking hook 11 losing the cylinder locking and accidentally losing the mechanical locking of the locking hook 12.

[0141] This embodiment provides a protrusion on the movement trajectory of the disengagement of the first tool pin shaft, thereby ensuring that the first tool pin shaft and the quick connection device are not separated under special circumstances such as failure of the driving component and failure of the first locking component, and the protrusion does not affect the installation of the tool, which can improve the reliability of the connection between the tool and the mounting base.

[0142] In some embodiments, Figures 1 to 14B As shown, the second locking component 2 includes:

[0143] The third pin 63 extends along a preset direction x;

[0144] The locking block 22 is rotatably connected to the third pin shaft 63. In the second locking state, the locking block 22 rotates to the first position. In the first position, the first end of the locking block 22 abuts against the second tool pin shaft 103 to prevent the second tool pin shaft 103 from disengaging from the second locking hook 21.

[0145] Specifically, the first end of the locking block 22 can be abutted against the second tool pin 103 by various means to prevent the second tool pin 103 from disengaging from the second locking hook 21. For example, the fourth pin 64 of the first linear drive component 51 can be abutted against the end of the lock slot 24 of the locking block 22 close to the third pin 63 to achieve locking of the position of the locking block 22.

[0146] This embodiment can achieve mechanical locking of the second tool pin by having the first end of the locking block abut against the second tool pin at a first position to prevent the second tool pin from disengaging from the second locking hook, thereby improving the reliability of the connection between the tool and the mounting base.

[0147] In some embodiments, Figures 1 to 14B As shown, the second locking component 2 also includes:

[0148] The second limiting member 42 is used to limit the first end of the locking block 22 to an extreme position of rotation in a direction away from the first tool pin 102 .

[0149] Specifically, when the second tool pin 103 is disengaged from the second locking hook 21, the locking block 22 will tend to rotate counterclockwise, and the second stopper 42 can further prevent the locking block 22 from rotating, so that the first end of the locking block 22 always abuts against the second tool pin 103. Optionally, in the first position, the first end of the locking block 22 blocks the falling path of the second tool pin 103.

[0150] In this embodiment, the first end of the locking block abuts against the second tool pin shaft at a first position to prevent the second tool pin shaft from disengaging from the second locking hook. At the same time, the second limit member can limit the extreme position of the counterclockwise rotation of the locking block, thereby achieving multiple mechanical locking of the second tool pin shaft and improving the reliability of the connection between the tool and the mounting base.

[0151] In some embodiments, Figures 1 to 14B As shown, the quick connection device further includes a housing 3, and the second locking component 2 further includes:

[0152] The first elastic member 23 is connected between the locking block 22 and the housing 3 , and is used to apply an elastic force to the locking block 22 to rotate toward the second limiting member 42 .

[0153] Specifically, the first elastic member 23 is used to apply a counterclockwise elastic force to the locking block 22 to fix the position of the locking block 22 and prevent the locking block 22 from deviating from the first position due to interference from other factors. Even if the first locking component 1 is damaged, the second locking component 2 can still function.

[0154] This embodiment maintains the locking block in the first position by means of an elastic member, thereby preventing the locking block from moving randomly due to interference from other factors, and improving the reliability of the connection between the tool and the mounting base.

[0155] In some embodiments, Figures 1 to 14B As shown, the quick connection device further includes a housing 3 and a fourth pin 64 extending along a preset direction x, a slideway 32 is provided on the housing 3, the fourth pin 64 is movably connected to the housing 3 along the slideway 32, the locking block 22 further includes a locking groove 24, the fourth pin 64 is provided in the locking groove 24 and the fourth pin 64 abuts against the inner wall of the locking groove 24;

[0156] Among them, the movement of the fourth pin shaft 64 is used to drive the locking block 22 to rotate around the third pin shaft 63. When the fourth pin shaft 64 moves along the slide 32 from one end of the lock groove 24 close to the third pin shaft 63 to the end of the lock groove 24 away from the third pin shaft 63, the second locking component 2 switches from the second locked state to the second unlocked state.

[0157] Specifically, Figures 6 to 11 As shown, the slideway 32 can extend in the horizontal direction. Specifically, the slideway 32 can limit the moving path of the fourth pin shaft, and the lock slot 24 can limit the moving path of the locking block 22. Specifically, the fourth pin shaft 64 moves along the slideway 32 from one end of the lock slot 24 close to the third pin shaft 63 to one end of the lock slot 24 away from the third pin shaft 63, driving the locking block 22 to rotate clockwise around the third pin shaft, thereby unlocking the second locking component 2.

[0158] Optionally, in the process that the fourth pin 64 moves along the slideway 32 from one end of the lock slot 24 close to the third pin 63 to one end of the lock slot 24 away from the third pin 63, several intermediate states can be set according to actual needs. Specifically, only setting the two states of always helps to achieve accurate control of the second locking component 2.

[0159] This embodiment achieves unlocking of the second locking component by moving the fourth pin shaft, which can reduce the number of moving parts of the second locking component to effectively reduce manufacturing costs. At the same time, the movement path of the moving parts is limited by the slideway and the lock groove, which can achieve precise control of the second locking component and improve the reliability of the connection between the machine and the mounting base.

[0160] In some embodiments, Fig.10 As shown, in the second unlocked state, the locking block 22 rotates to the second position, and in the second position, the first end of the locking block 22 is spaced apart from the falling path of the second tool pin 103 .

[0161] Specifically, in the second locking state, the locking block 22 is located at the first position, and the first end of the locking block 22 abuts against the second tool pin 103. When the second locking component 2 is switched to the second unlocking state, the locking block 22 rotates to the second position spaced apart from the falling path of the second tool pin 103, so that the second tool pin 103 can freely detach from the second lock hook 21. Optionally, as Figures 6 to 11 As shown, the falling path of the second tool pin 103 can extend in the horizontal direction.

[0162] In this embodiment, the second locking component is unlocked by rotating the locking block to the second position. The mechanical locking and unlocking structure is reliable and effective, and can improve the reliability of the connection between the machine and the mounting base.

[0163] In some embodiments, Figures 1 to 14B As shown, the quick connection device further includes a housing 3, and the second locking component 2 further includes:

[0164] The first elastic member 23 is connected between the locking block 22 and the housing 3, and is used to apply an elastic force to the locking block 22 to rotate toward the second limiting member 42. The elastic force of the first elastic member 23 at the first position of the locking block 22 is smaller than that at the second position.

[0165] Specifically, the force exerted by the first elastic member 23 on the locking block 22 at the second position is greater than that at the first position, which is conducive to driving the locking block 22 to overcome the rotational resistance and return to the first position.

[0166] This embodiment makes the elastic force of the elastic member at the second position greater, which helps the locking block to overcome the rotational resistance and return to the first position, and can prevent the locking block from moving randomly due to interference from other factors, thereby improving the reliability of the connection between the machine and the mounting base.

[0167] In some embodiments, Figures 6 to 10 As shown, the quick connection device also includes a first linear drive component 51 and a third limiter 43, the first end of the first linear drive component 51 is connected to the first lock hook 11, the second end of the first linear drive component 51 is connected to the fourth pin 64, and the third limiter 43 is used to limit the first lock hook 11 to rotate in a direction away from the first tool pin 102 to an extreme position;

[0168] When the first locking component 1 is in the first unlocking state and the first linear driving component 51 is retracted to a preset length, the first locking hook 11 abuts against the third limiting component 43 , and the first linear driving component 51 continues to retract to drive the fourth pin 64 to move along the slideway 32 .

[0169] Specifically, the first end of the first linear drive component 51 can be connected to the first lock hook 11 through the fifth pin 65. Optionally, the fifth pin 65 can be a hinge shaft. Optionally, the first linear drive component 51 can be a cylinder, an electric push rod, etc. Optionally, the third limiter 43 can be a stopper, etc. Optionally, the third limiter 43 can be provided on the housing 3.

[0170] Specifically, the first linear drive component 51 can realize the engagement of the first locking hook 11 with the first tool pin 102 when extended, and the first linear drive component 51 drives the first locking hook 11 to rotate counterclockwise around the first pin 61 when retracted. The first locking hook 11 will be limited by the third limiting member 43 after rotating counterclockwise by a certain angle, and thereafter the first locking hook 11 will no longer move. The first linear drive component 51 continues to retract and will drive the fourth pin 64 to move leftward along the slide 32, so that the fourth pin 64 moves from the end of the lock groove 24 close to the third pin 63 to the end of the lock groove 24 away from the third pin 63, thereby causing the locking block 22 to rotate from the first position to the second position around the third pin 63 to complete the unlocking of the second locking component 2.

[0171] This embodiment is connected to the fourth pin shaft through the second end of the first linear drive component, and limits the extreme rotation position of the first lock hook through the third limit member, so that the operator can unlock the second locking component in the cab by controlling the contraction of the first linear drive component, and then quickly install or replace the equipment, which can reduce the difficulty of operation and improve efficiency.

[0172] In some embodiments, Figures 15 to 28 As shown, the quick connection device includes a second locking component 2, a first locking hook 11, a second locking hook 21, a housing 3 and a first linear driving component 51, a slideway 32 is provided on the housing 3, and the second locking component 2 includes:

[0173] The third pin 63 extends along a preset direction x;

[0174] A locking block 22 is rotatably connected to the third pin 63, the locking block 22 includes a locking groove 24, in the second locking state, the locking block 22 is in the first position, and the first end of the locking block 22 abuts against the second tool pin 103 to prevent the second tool pin 103 from being separated from the second locking hook 21; and

[0175] The fourth pin 64 extends along the preset direction x, is disposed in the lock slot 24 and abuts against the inner wall of the lock slot 24, and is movably connected to the housing 3 along the slideway 32. In the first position, the fourth pin 64 abuts against one end of the third pin 63 in the lock slot 24;

[0176] The first end of the first linear driving component 51 is connected to the fourth pin 64, and the second end of the first linear driving component 51 is connected to the first locking hook 11. The first linear driving component 51 is configured to rotate and maintain the locking block 22 at the first position by extending, and to engage the first locking hook 11 with the first tool pin 102, thereby reaching the second locking state.

[0177] Optionally, the locking groove 24 is in the shape of an oblong, an arc or a triangle.

[0178] Specifically, when the locking block 22 is in the first position, the slideway 32 and the lock slot 24 extend in different directions, and the slideway 32 and the lock slot 24 cooperate to lock the fourth pin 64 at one end of the lock slot 24 close to the third pin 63, so that even if the first linear drive component 51 fails, the second locking component 2 will not be unlocked. Specifically, the slideway 32 and the second locking component 2 cooperate to enable the locking block 22 to effectively achieve mechanical locking of the second tool pin 103, and even without the first locking component 1, the reliability of the connection between the tool and the mounting base can still be improved. Optionally, the slideway 32 can extend in the horizontal direction. Optionally, the first linear drive component 51 can be a hydraulic cylinder, an electric push rod, etc.

[0179] Specifically, the first linear drive component 51 extends to rotate the locking block 22 and keep it in the first position, thereby mechanically locking the second tool pin 103 and engaging the first lock hook 11 with the first tool pin 102, thereby reaching the second locking state and achieving a stable connection between the tool and the mounting base. Optionally, a fifth pin 65 is provided at one end of the first lock hook 11 away from the second pin 62, and the second end of the first linear drive component 51 can be hinged to the first lock hook 11 through the fifth pin 65, so that the first linear drive component 51 drives the first lock hook 11 to rotate around the second pin 62.

[0180] Specifically, when the shape of the locking groove 24 is an oblong, the fourth pin shaft 64 and the locking block 22 are better limited, and the rotation of the locking block 22 does not require the assistance of a torsion spring; when the shape of the locking groove 24 is an arc, the torque of the initial rotation can be effectively improved and the influence of the mechanism resistance can be reduced; when the shape of the locking groove 24 is a triangle, such as a rounded triangle, the locking block 22 has a larger movable space. For example, even if the first linear drive component 51 remains in an extended state and the fourth pin shaft 64 does not move, when the second tool pin shaft 103 enters the second locking hook 21 from the outside of the quick connecting device, the locking block 22 can also rotate clockwise around the third pin shaft 63, thereby entering the second locking hook 21.

[0181] This embodiment achieves mechanical locking of the second tool pin shaft through the cooperation of the second locking component and the slide, which can improve the reliability of the connection between the tool and the mounting base; even if the first linear drive component fails or there is no first locking component, it can still ensure that the tool and the mounting base are reliably connected, which can improve the safety of construction machinery operations; the first linear drive component can ensure that the quick connection device can be unlocked by the operator at any position, which is simpler than using manual latches or gravity unlocking operations, and can improve operational safety and efficiency.

[0182] In some embodiments, Fig.10 , 20 As shown in 27, when the fourth pin shaft 64 moves along the slide 32 from the end close to the third pin shaft 63 in the lock groove 24 to the end away from the third pin shaft 63, the locking block 22 rotates from the first position to the second position, and the second locking component 2 switches from the second locked state to the second unlocked state. In the second position, the first end of the locking block 22 is spaced apart from the falling path of the second tool pin shaft 103.

[0183] Specifically, the contraction of the first linear drive component 51 can drive the fourth pin 64 to move along the slide 32 toward the end away from the third pin 63, that is, the first linear drive component 51 extends. Specifically, the slide 32 can limit the movement path of the fourth pin, and the lock slot 24 can limit the movement path of the locking block 22. Specifically, the fourth pin 64 moves along the slide 32 from the end of the lock slot 24 close to the third pin 63 to the end of the lock slot 24 away from the third pin 63, driving the locking block 22 to rotate clockwise around the third pin 63, so that the first end of the locking block 22 is separated from the falling path of the second tool pin 103, thereby realizing the unlocking of the second locking component 2.

[0184] Optionally, in the process that the fourth pin 64 moves along the slideway 32 from one end of the lock slot 24 close to the third pin 63 to one end of the lock slot 24 away from the third pin 63, several intermediate states can be set according to actual needs. Specifically, only two states are set to help achieve precise control of the second locking component 2.

[0185] This embodiment unlocks the second locking component by moving the fourth pin shaft, which can reduce the number of moving parts of the second locking component to effectively reduce manufacturing costs. At the same time, the movement path of the fourth pin shaft is limited by the cooperation of the slideway and the lock groove, which can achieve precise control of the second locking component and improve the reliability of the connection between the machine and the mounting base.

[0186] In some embodiments, Figure 22 to Figure 24 As shown, in the process of switching from the second locked state to the second unlocked state, F1*lc>F2*ld is satisfied;

[0187] Among them, F1 is the pressure of the fourth pin shaft 64 on the inner surface of the lock groove 24, lc is the perpendicular distance from the center of the third pin shaft 63 to the straight line extending in the direction of F1, F2 is the friction force between the fourth pin shaft 64 and the inner surface of the lock groove 24, and ld is the distance between the center of the third pin shaft 63 and the force application point of the fourth pin shaft 64 on the inner surface of the lock groove 24.

[0188] Specifically, the center position of the third pin 63 can be point O. Specifically, during the conversion process from the second locked state to the second unlocked state, the fourth pin 64 will press the inclined surface H, and the fourth pin 64 will generate pressure in the direction of F1 on the inclined surface H at the force application point. At the same time, during the movement, the pressure in the direction of F1 will generate sliding friction in the direction of F2. Specifically, the pressure in the direction of F1 takes lc as the force arm, and generates a clockwise rotation torque around the third pin 63 on the locking block 22. The sliding friction in the direction of F2 takes ld as the force arm, and generates a counterclockwise rotation torque around the third pin 63 on the locking block 22. If the structural design is unreasonable, the torque generated by F2 may be greater than or equal to the torque generated by F1, thereby entering a self-locking state. No matter how much force is applied to the fourth pin 64, the fourth pin 64 cannot be moved to the left along the slide 32. Optionally, since the sliding friction of F2 is generated by the pressure of F1, F2 is much smaller than F1, and even if ld is greater than lc, the locking block 9 can still be rotated clockwise. Specifically, during the switching process from the second unlocking state to the second locking state, the force application point of the fourth pin shaft 64 is on the I inclined surface.

[0189] More specifically, if the mechanism is to be unlocked, in order to ensure that the pin 64 slides to the left to produce a clockwise rotation effect, the basic unlocking condition needs to be met, that is, the length la needs to be greater than the length lb. Specifically, la is the distance between point O and the center of the fourth pin 64 in the first position, and lb is the distance between point O and the center of the fourth pin 64 in the second position. Specifically, the acute angle between line segment la and line segment lb is θ, and line segment lb rotates counterclockwise by θ to be collinear with line segment la.

[0190] Specifically, as the fourth pin 64 continues to move to the left, the locking block 22 rotates clockwise and switches from the first position to the second position. During the change, the length of the force arm ld of F2 on the point O decreases, the length of the force arm lc of F1 on the point O increases, and the clockwise combined torque generated by F1 and F2 on the point O gradually increases. Correspondingly, in the case where the lock slot 24 is an oblong slot, as the fourth pin 64 moves to the left, the sliding resistance of the fourth pin 64 will gradually decrease. The characteristic that the rotation speed of the locking block 22 gradually increases with the contraction stroke when the first linear drive component 51 contracts can improve the smoothness of unlocking.

[0191] This embodiment can improve the smoothness of the rotation of the locking block by optimizing the structural design of the second locking component, increase the ease of use of the quick connection device, meet the unlocking conditions of the second locking component, and avoid the occurrence of self-locking.

[0192] In some embodiments, Fig.24 As shown, the shape of the lock slot 24 is an arc, which can further increase the smoothness of the mechanism operation and improve the initial unlocking torque. Specifically, the principle adopted by this arc slot is that when the positions of the two ends of the slide slot of the locking block 22 relative to the center of the third pin 63 remain unchanged, the end face angle at the start of unlocking position J rotates clockwise, and the unlocking end position K should rotate counterclockwise accordingly to ensure the continuity of the slideway, increase the force arm lc of F1 to point O, and reduce the force arm ld of F2 to point O. The use of this arc lock slot will shorten the length of ld and increase the length of lc, effectively increase the initial rotation torque, and reduce the impact of the mechanism resistance.

[0193] In some embodiments, Figures 15 to 28 As shown, the quick connection device also includes a third limiter 43, which is used to limit the extreme position of the first lock hook 11 rotating in a direction away from the first tool pin 102. When the first linear drive component 51 is retracted to a preset length, the first lock hook 11 abuts against the third limiter 43, and the first linear drive component 51 continues to retract to drive the fourth pin 64 to move along the slide 32 in a direction away from the third pin 63, so that the locking block 22 rotates from the first position to the second position; and / or

[0194] The second locking component 2 also includes: a first elastic member 23, connected between the locking block 22 and the housing 3, for applying an elastic force to the locking block 22 to maintain it in the first position, and the elastic force of the first elastic member 23 at the first position of the locking block 22 is smaller than that at the second position.

[0195] Optionally, the third limiting member 43 may be a stopper, etc. Optionally, the third limiting member 43 may be provided on the housing 3. Specifically, when the first linear driving member 51 contracts, it drives the first locking hook 11 to rotate counterclockwise around the first pin 61. After the first locking hook 11 rotates counterclockwise by a certain angle, it will be limited by the third limiting member 43. After that, the first locking hook 11 will no longer move. The first linear driving member 51 continues to contract and drives the fourth pin 64 to move leftward along the slideway 32, so that the fourth pin 64 moves from one end of the locking groove 24 close to the third pin 63 to one end of the locking groove 24 away from the third pin 63, so that the locking block 22 rotates around the third pin 63 from the first position to the second position, so as to complete the unlocking of the second locking member 2.

[0196] Specifically, the first elastic member 23 is used to apply a counterclockwise elastic force to the locking block 22 to fix the position of the locking block 22 and prevent the locking block 22 from deviating from the first position due to interference from other factors. Even if the first linear drive component 51 fails or the fourth pin 64 is displaced due to damage, the second locking component 2 can still function. Specifically, the force exerted by the first elastic member 23 on the locking block 22 at the second position is greater than that at the first position, which is conducive to driving the locking block 22 to overcome the rotation resistance and return to the first position. Specifically, in the process of switching from the second locked state to the second unlocked state, the locking block 22 overcomes the restoring force of the first elastic member 23 and rotates clockwise from the first position to the second position.

[0197] This embodiment limits the extreme rotation position of the first lock hook by the third limit member, so that the operator can unlock the second locking member in the cab by controlling the contraction of the first linear drive member, and then quickly install or replace the machine, which can reduce the difficulty of operation and improve efficiency; the locking block is kept in the first position by the elastic member, which can prevent the locking block from being disturbed by other factors and moving at will, thereby improving the reliability of the connection between the machine and the mounting base; the elastic force at the second position is greater, which is conducive to the locking block overcoming the rotational resistance and returning to the first position, which can prevent the locking block from being disturbed by other factors and moving at will, thereby further improving the reliability of the connection between the machine and the mounting base.

[0198] In some embodiments, Figures 15 to 28 As shown, the quick connection device further includes a first locking component 1 and a first pin 61 extending along a preset direction x, a first end of the first locking hook 11 is rotatably connected to the first pin 61, a second end of the first locking hook 11 is connected to a second end of the first linear driving component 51, and the first locking component 1 includes:

[0199] The second elastic member 14 is sleeved on the first linear driving member 51, and both ends of the second elastic member 14 are respectively against the first end and the second end of the first linear driving member 51, and the second elastic member 14 is in a compressed state in the first locking state, so that the first linear driving member 51 is maintained in an extended state.

[0200] Specifically, in the first locking state, the first linear driving component 51 is in an extended state. Specifically, the driver can switch the first locking component from the first locking state to the first unlocking state by contracting the first linear driving component 51. Specifically, when the first locking component 1 is in the first locking state, the second locking component 2 must be in the second locking state; when the first locking component 1 is first in the first unlocking state, the second locking component 2 can be in the second locking state or the second unlocking state according to the contraction length of the first linear driving component 51.

[0201] Specifically, in the first locking state, the second elastic member 14 applies a force to the first lock hook 11 to rotate around the first pin 61 in the direction close to the first tool pin 102 (clockwise), and the second elastic member 14 also applies a force to the fourth pin 64 to move in the direction close to the third pin 63 (right direction). Specifically, the second elastic member 14 can keep the first linear drive member 51 in an extended state when the first linear drive member 51 fails, ensuring that the quick connection device is in the first locking state and the second locking state at the same time. For example, when the hydraulic system of the oil cylinder fails, the second elastic member 14 generates a thrust to keep the first lock hook 11 in the locked position, and keep the fourth pin 64 in the locked position (first position).

[0202] Specifically, during the contraction of the first linear drive component 51, the second elastic component 14 is further compressed, the first lock hook 11 rotates counterclockwise around the first pin 61, and the locking block 22 is restricted to the first position because the slideway 32 cooperates with the lock slot 24 to restrict the fourth pin 64 or the first elastic component 23. Specifically, when the first lock hook 11 rotates counterclockwise around the first pin 61 to contact the third limiter 43, the first tool pin 102 is unlocked and can be removed from the quick connection device, while the second tool pin 103 is still in a locked state, the first linear drive component 51 further contracts to rotate the locking block 22 to the second position, the second tool pin 103 is unlocked, and the entire tool can be removed from the quick connection device.

[0203] This embodiment uses the second elastic member as the first locking member, which can ensure that the driver can complete the replacement of equipment through the quick connection device in the cab of construction machinery such as excavators, and realize automatic locking and unlocking; at the same time, the quick connection device has two independent locking systems to effectively ensure the safety of the use of construction machinery.

[0204] In some embodiments, Figures 15 to 28 As shown, the first end of the locking block 22 is provided with a groove 25, which is configured to abut against the second tool pin 103 when the first linear drive component 51 fails and the elastic force of the second elastic member 14 is insufficient, so as to prevent the second tool pin 103 from disengaging from the second locking hook 21; and / or

[0205] The first locking hook 11 includes an extension portion 111 , which protrudes from the hook portion of the first locking hook 11 to accommodate the first tool pin 102 when the first linear drive component 51 fails and the elastic force of the second elastic member 14 is insufficient, so as to prevent the first tool pin 102 from detaching from the first locking hook 11 .

[0206] Specifically, when the groove 25 is damaged at the G position, the locking block 22 can still clamp the second tool pin 103. The structural limit of the groove 25 and the extension 111 of this embodiment can reduce the elastic force of the second elastic member 14 required, and improve the stability of the locking. Even if the first linear drive component 51 fails and the elastic force of the second elastic member 14 is insufficient, it can still ensure that the tool is stably connected to the mounting base without separation.

[0207] The inventors also found during the production process that for the first linear drive component 51 on the quick connection device of large-tonnage engineering machinery, such as a cylinder, the elastic thrust of the second elastic component 14 may be very large. When the quality of the first linear drive component 51 is seriously damaged, if the first tool pin 102 has been separated from the first lock hook 11, the second elastic component 14 will release elastic potential energy sharply, causing the first lock hook 11 and the first linear drive component 51 to move the rod diameter with large kinetic energy. When the first linear drive component 51 reaches the maximum stroke, the kinetic energy will not disappear, so the fourth pin 64 will be subjected to traction to the left. If the traction exceeds the matching limiting force of the slide 32 and the lock groove 24 or the reverse elastic force of the first elastic component 23, the second tool pin 103 will be accidentally unlocked. This situation belongs to an extreme working condition but is theoretically possible.

[0208] To avoid safety accidents under the above extreme working conditions, in some embodiments, Figure 25 to Figure 28 As shown, the quick connection device further includes a fourth limiting member 44, which is configured to abut against the locking block 22 in the second locking state to keep the locking block 22 in the first position, and the fourth limiting member 44 includes:

[0209] The sixth pin 66 extends along a preset direction x;

[0210] The first section 441 is rotatably connected to the sixth pin shaft 66, and one end of the first section 441 away from the sixth pin shaft 66 abuts against the locking block 22 in the second locking state;

[0211] The second section 442 is fixedly connected to the first section 441 and rotatably connected to the sixth pin 66; and

[0212] a third elastic member 443 configured to fix the position of at least one of the first section 441 and the second section 442 in the second locking state;

[0213] In the process of switching from the second locked state to the second unlocked state, the first lock hook 11 contacts the end of the second section 442 away from the sixth pin 66 and causes the second section 442 to rotate around the sixth pin 66 to cause the first section 441 to rotate in a direction away from the third pin 63.

[0214] Specifically, the extreme working condition needs to simultaneously meet the failure of the first linear drive component 51, the failure of the slideway 32 and the lock groove 24 to limit the position of the fourth pin 64, the failure of the first elastic member 23 (optionally), the failure of the structural limit of the groove 25 and the extension 111 (optionally), and the first tool pin 102 accidentally falls off, and the second elastic member 14 releases elastic potential energy rapidly. Specifically, when the first linear drive component 51 is seriously damaged, such as a large amount of hydraulic oil leakage in the hydraulic cylinder, and the first tool pin 102 falls, the energy of the second elastic member 14 such as the spring is rapidly released, and the first lock hook 11 is driven to rotate clockwise around the first pin 61 at a certain speed through the fifth pin 65. When the first linear drive component 51 is extended to the longest, the first linear drive component 51 and the first lock hook 11 have kinetic energy in the left direction, and this kinetic energy causes the fourth pin 64 to move to the left unexpectedly.

[0215] Specifically, when the second section 442 of the fourth limiting member 44 does not contact the first locking hook 11, the end of the first section 441 away from the sixth pin shaft 66 abuts against the locking block 22 at the L position, which can effectively prevent the first linear drive component 51 from being damaged and the second elastic member 14 from being suddenly released, causing the fourth pin shaft 64 to move to the left (away from the third pin shaft 63).

[0216] Specifically, when the first linear drive component 51 contracts, the first locking hook 11 rotates counterclockwise around the first pin 61 and contacts the second section 442 at the M position, and the first linear drive component 51 continues to contract, causing the second section 442 and the first section 441 to rotate clockwise around the sixth pin 66, thereby removing the lock on the locking block 22 at the L position; when the first linear drive component 51 continues to contract, the contact position between the first locking hook 11 and the second section 442 becomes the N position, and the fourth pin 64 is moved to the left under the drive of the first linear drive component 51, and the locking block 22 releases the lock on the second tool pin 103.

[0217] This embodiment can effectively prevent the locking block from rotating under extreme working conditions by abutting the locking block with the fourth limit member in the second locking state, avoid accidental unlocking of the second tool pin, and further improve the safety of the connection between the tool and the mounting base.

[0218] Secondly, the present disclosure provides an engineering machine, such as Figure 1 , 29 As shown in FIG. 30 , the embodiment includes a mounting base 104 , a tool 101 and a quick connection device according to the above embodiment, wherein the quick connection device connects the tool 101 to the mounting base 104 in a detachable manner.

[0219] The engineering machinery of this embodiment can quickly and flexibly install or replace equipment through a lockable quick connection device, which is beneficial to broadening the functions of the engineering machinery. The reliability of the connection between the equipment and the mounting base is high, and the safety of the engineering machinery operation is high. After the equipment is installed, there is no need for manual latches to achieve locking, which can reduce the fall of equipment caused by operational errors during operation and improve operation safety. The operator can replace the equipment in the cab, which can reduce the difficulty of operation when replacing equipment and improve efficiency.

[0220] In some embodiments, Figure 1 , 29 As shown in FIG. 30 , the construction machinery is an excavator, the tool 101 includes a bucket, the mounting base 104 includes a boom 105 and a connecting rod 106, the bucket is connected to the first end of the boom 105 and the first end of the connecting rod 106 through a quick connection device, and the second end of the connecting rod 106 is rotatably connected to the boom 105 through a rocker arm 107.

[0221] Specifically, the excavator may also include a second linear drive component 52, such as a hydraulic cylinder, etc. The first end of the second linear drive component 52 is rotatably connected to the second end of the connecting rod 106, the second linear drive component 52, the connecting rod 106 and the rocker arm 107 are hinged at the same point, and the second end of the second linear drive component 52 is rotatably connected to the second end of the bucket 105.

[0222] The following takes an excavator in which the implement 101 is a bucket as an example, and describes the working principles of the first embodiment and the second embodiment of the quick connection device disclosed in the present invention in conjunction with the accompanying drawings.

[0223] like Fig.14A As shown, the bucket first fits with the quick-connect device, but at this time the first tool pin 102 and the second tool pin 103 are not yet installed in place, the first linear drive component 51 is extended, and the first locking hook 11 is pushed to rotate clockwise around the first pin 61 through the fifth pin 65 to clamp the first tool pin 102. At the same time, the first linear drive component 51 is extended to push the bucket into position, that is, the bucket and the quick-connect device are installed in place.

[0224] like Figure 2 and Fig. 14B As shown, the first locking component 1 of the quick connection device is in the first locking state, the second locking component 2 is in the second locking state, and the first tool pin 102 and the second tool pin 103 of the bucket are both locked. When the first linear drive component 51 loses power, the first locking hook 11 will tend to rotate in the loosening direction (counterclockwise) under the action of the first tool pin 102's own gravity. At this time, because the locking hook 12 tends to rotate counterclockwise around the second pin 62 under the action of gravity and engages with the first locking hook 11, the engagement method can be as follows: Figure 2The position A shows that the two inclined surfaces are engaged with each other, so the first locking hook 11 cannot be released.

[0225] At the same time, the falling path of the second tool pin 103 is horizontal to the right, and the first end of the locking block 22 blocks the falling path of the second tool pin 103 and abuts against the second tool pin 103. The tendency of the second tool pin 103 to disengage from the second locking hook 21 will cause the locking block 22 to rotate counterclockwise. The second limit member 42 can prevent the locking block 22 from rotating, so that the second locking hook 21 cannot be loosened, and the first elastic member 23 applies a counterclockwise elastic force to the locking block 22 to fix the position of the locking block 22. Even if the first linear drive component 51 and the first locking component 1 are damaged, the second locking component 2 can still function.

[0226] In addition, if Fig.12 and Fig.13 As shown, the housing 3 of the quick connection device is provided with a protrusion 31 in the area near the first tool pin 102. The protrusion 31 is provided on the movement trajectory of the first tool pin 102 to prevent the first tool pin 102 from disengaging. In the special case where both the first linear drive component 51 and the first locking component 1 fail, the first tool pin 102 can still be prevented from disengaging, and the protrusion 31 does not affect the installation of the bucket, providing double protection for the locking of the first tool pin 102. Specifically, because the first locking component 1 and the second locking component 2 are independent of each other, when the first locking component 1 is damaged, the second locking component 2 still plays a locking role, that is, the second locking component 2 is in the second locking state, so even if the first locking component 1 fails, the movement trajectory of the first tool pin 102 disengaging is an arc with the second tool pin 103 as the center.

[0227] like Figures 1 to 14B As shown, during actual use, the angle of the quick-connect device will change with the angle of the bucket. When the quick-connect device is rotated to different positions, the center of gravity of the locking hook 12 will also change. When the quick-connect device is rotated to the first angle range, that is, the quick-connect device is between position a and position b, the locking hook 12 has a tendency to rotate clockwise to unlock under the action of gravity. The weight block 13 and the limiter 121 cooperate to prevent the unlocking tendency of the locking hook 12, so that the locking hook 12 remains in the locked position. Specifically, within the first angle range, the second end of the weight block 13 rotates in the counterclockwise direction, and the locking hook 12 is limited to rotate clockwise by mutual compression with the limiter 121 at position B, thereby expanding the angle range of the locking hook 12 and improving the reliability of the connection between the machine and the mounting base.

[0228] Specifically, the gravity block 13 will be limited by the first limiter 41 when it rotates clockwise around the second pin 62 at a certain angle. The first limiter 41 can control the gravity block 13 to rotate within a certain small range, and can more accurately control the range of motion of the gravity block 13, so as to prevent the gravity block 13 from affecting the free rotation of the locking hook 12 outside the first angle range. Specifically, the limiter 121 and the first limiter 41 cooperate with each other to control the rotation angle of the gravity block 13, thereby controlling the locking and unlocking range of the first locking component 1.

[0229] like Figure 5 As shown, when the quick connection device is rotated to the second angle range, that is, the quick connection device is between the b position and the c position, the equivalent center of gravity of the locking hook 12 and the gravity block 13 shifts toward the direction of the locking hook 12 disengaging, and the locking hook 12 disengages from the first locking hook 11 to complete the unlocking of the first locking component 1, so that the first locking component 1 switches from the first locked state to the first unlocked state. The operator can unlock the first locking component by gravity by controlling the rotation angle of the bucket (quick connection device) in the cab, and the uniqueness of the unlocking area can be guaranteed. Specifically, the above-mentioned a, b, and c positions are only schematic positions. The actual unlocking position of the quick connection device may shift or change according to the shape, center of gravity position, etc. of the locking hook 12 and the gravity block 13. In actual situations, the second angle range is less than Figure 5 Specifically, during the operation of the bucket, most of the angles corresponding to the quick connection device are not within the second angle range.

[0230] like Figures 6 to 11 As shown, the first end of the first linear drive component 51 of the quick connecting device is connected to the first locking hook 11, and the second end of the first linear drive component 51 is connected to the fourth pin 64. The third limit member 43 can limit the extreme position of the counterclockwise rotation of the first locking hook 11. When the first locking component 1 is in the first unlocked state and the first linear drive component 51 is contracted, the first locking hook 11 abuts against the third limit member 43, and the first linear drive component 51 continues to contract to drive the fourth pin 64 to move from right to left along the slide 32, so that the locking block 22 rotates around the third pin 63 from the first position to the second position to complete the unlocking of the second locking component 2, so that the second locking component 2 switches from the second locked state to the second unlocked state.

[0231] Specifically, the operator can install and lock the bucket in the cab by controlling the extension of the first linear drive component 51, unlock the first locking component 1 by controlling the rotation angle of the bucket (quick connection device) to the second angle range, and unlock the second locking component 2 by controlling the contraction of the first linear drive component 51, thereby quickly installing or replacing equipment, reducing operating difficulty and improving efficiency.

[0232] The above embodiment uses a locking hook and a gravity block to mechanically lock the first tool pin shaft by pure gravity. The locking hook has a large locking angle range, and the protrusion is used to provide multiple guarantees for the locking of the first tool pin shaft. The locking block and the slide groove structure are used to achieve locking and unlocking of the second tool pin shaft. There are few moving parts and low manufacturing costs. The locking reliability is high and no manual pin is required to achieve locking. The operator can achieve locking and unlocking by controlling the rotation angle of the first linear drive component and the quick connection device, and then quickly install or replace the tool, which can improve the reliability of the connection between the tool and the installation base, and the safety of engineering machinery operations is high. This solution has at least the following advantages:

[0233] 1. When the first linear drive component 51 fails, the quick connection device and the tool 101 are not separated.

[0234] 2. The quick connection device can only be unlocked within a specific angle range, which effectively improves the safety of the quick connection device.

[0235] 3. By adopting a double lock structure in which the first locking component 1 and the second locking component 2 cooperate and are relatively independent, there is no direct linkage relationship between the two locks. Damage to the first locking component 1 will not cause the second locking component 2 to be unlocked, which can effectively improve the safety of the quick connection device.

[0236] 4. The driver can independently complete the connection or separation of the quick connection device and the implement 101 directly in the cab.

[0237] 5. The quick-connect device can be directly matched with ordinary buckets of corresponding tonnage, without the need to produce special buckets.

[0238] 6. The quick connection device reserves space for increasing material size, which can effectively improve structural strength.

[0239] The following takes an excavator in which the implement 101 is a bucket as an example, and describes the working principles of the third embodiment, the fourth embodiment and the fifth embodiment of the quick connection device of the present disclosure in conjunction with the accompanying drawings.

[0240] like Fig.15 , 16 As shown in FIG. 25 , the tool 101 is reliably connected to the mounting base 104 via a quick connection device, and the second locking component 2 is in the second locking state. In the fourth embodiment, the first locking component 1 is in the first locking state. In the fifth embodiment, the fourth limiting member 44 is in an absolute limiting state for the locking block 22.

[0241] like Figures 17 to 20As shown, by making the first linear drive component 51 drive the first lock hook 11 to rotate counterclockwise until it abuts against the third limit member 43, the first tool pin 102 can be removed; thereafter, the first lock hook 11 no longer moves, and the first linear drive component 51 continues to contract to drive the fourth pin 64 to move leftward along the slide 32, so that the fourth pin 64 moves from the end of the lock groove 24 close to the third pin 63 to the end of the lock groove 24 away from the third pin 63, thereby making the locking block 22 rotate around the third pin 63 from the first position to the second position, so as to complete the unlocking of the second locking component 2, and the second tool pin 103 can be removed.

[0242] Specifically, in the process of switching from the second locked state to the second unlocked state, the locking block 22 overcomes the restoring force of the first elastic member 23 and rotates clockwise from the first position to the second position.

[0243] Optionally, to avoid safety accidents under extreme working conditions, such as Figure 25 to Figure 28 As shown, the fourth limiting member 44 abuts against the locking block 22 in the second locking state, and is spaced apart from the locking block 22 in the second unlocking state. Fig.26 As shown, when the first linear driving component 51 contracts, the first locking hook 11 rotates counterclockwise around the first pin 61 and contacts the second section 442 at the M position; specifically, as shown in FIG. Fig. 27 As shown, the first linear drive component 51 continues to contract, causing the second section 442 and the first section 441 to rotate clockwise around the sixth pin 66, thereby removing the lock on the locking block 22 in the L position, and the contact position between the first locking hook 11 and the second section 442 becomes the N position. The fourth pin 64 is moved to the left under the drive of the first linear drive component 51, and the locking block 22 releases the lock on the second tool pin 103.

[0244] The above embodiment uses a locking hook and a gravity block to mechanically lock the first tool pin shaft by pure gravity. The locking hook has a large locking angle range, and the protrusion is used to provide multiple guarantees for the locking of the first tool pin shaft. The locking block and the slide groove structure are used to achieve locking and unlocking of the second tool pin shaft. There are few moving parts and low manufacturing costs. The locking reliability is high and no manual pin is required to achieve locking. The operator can achieve locking and unlocking by controlling the rotation angle of the first linear drive component and the quick connection device, and then quickly install or replace the tool, which can improve the reliability of the connection between the tool and the installation base, and the safety of engineering machinery operations is high. This solution has at least the following advantages:

[0245] 1. Ensure that the quick connection device and the tool 101 are not separated when the first linear drive component 51 fails;

[0246] 2. Ensure that the quick connection device can be unlocked by the operator at any position, so that the quick connection device can be independently connected or separated from the tool 101 in the vehicle, which is simpler than the gravity unlocking quick change operation;

[0247] 3. A locking and unlocking scheme in which a slideway and a lock groove cooperate is adopted, and the first linear drive component 51 is switched to a second unlocking state at the end of its stroke, so that the second locking component is not affected by the state of the first locking component;

[0248] 4. The quick-connect device can be directly matched with ordinary buckets of corresponding tonnage, without the need to produce special buckets;

[0249] 5. The second elastic member 14 is arranged on the first linear driving member 51 to apply thrust not only to the first locking hook 11 but also to the fourth pin 64, and cooperates with the first elastic member 23 to double elastically lock the position of the locking block 22;

[0250] 6. For larger tonnage, even if extreme working conditions occur, the first linear drive component 51 is severely damaged and the spring energy is released sharply, it can still effectively prevent safety accidents.

[0251] The above is a detailed introduction to a quick connection device and engineering machinery provided by the present disclosure. Specific embodiments are used in this article to illustrate the principles and implementation methods of the present disclosure. The description of the above embodiments is only used to help understand the method and core ideas of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present disclosure, several improvements and modifications can be made to the present disclosure, and these improvements and modifications also fall within the scope of protection of the claims of the present disclosure.

Claims

1. A quick connection device for connecting a tool (101) to a mounting base (104), wherein the tool (101) comprises a first tool pin (102) and a second tool pin (103) extending along a preset direction (x), wherein the quick connection device comprises at least one of a first locking component (1) and a second locking component (2), wherein the first locking component (1) is used to lock the first tool pin (102) and has a first locking state and a first unlocking state that can be automatically switched, and the second locking component (2) is used to lock the second tool pin (103) and has a second locking state and a second unlocking state that can be automatically switched.

2. The quick connection device according to claim 1, further comprising a first locking hook (11) and a first locking component (1), wherein a first end of the first locking hook (11) is rotatably connected to a first pin (61) extending along the preset direction (x), and a second end of the first locking hook (11) is used to engage with the first tool pin (102) in the first locking state, and the first locking component (1) include: A locking hook (12), wherein the first end of the locking hook (12) is rotatably connected to a second pin (62) extending along the preset direction (x), and the second end of the locking hook (12) is used to engage with the first end of the first locking hook (11) in the first locking state; and A gravity block (13), wherein a first end of the gravity block (13) is rotatably connected to the second pin shaft (62), and the gravity block (13) is used to keep the locking hook (12) in a locked position when the quick connection device is rotated to a first angle range, and the locking hook (12) has a tendency to separate from the first locking hook (11) due to the action of gravity within the first angle range, and the weight of the gravity block (13) is greater than that of the locking hook (12).

3. The quick connection device according to claim 2, wherein at least one of the first end of the locking hook (12) and the first end of the weight block (13) is provided with a limiting portion (121) for limiting the second end of the weight block (13) to rotate to an extreme position in a direction away from the first pin shaft (61); Optionally, the limiting portion (121) is provided between the locking hook (12) and the gravity block (13), and within the first angle range, the gravity block (13) and the limiting portion (121) are pressed against each other.

4. The quick connection device according to claim 2, further comprising a first limit member (41) for limiting the second end of the gravity block (13) to rotate to an extreme position close to the first pin shaft (61).

5. The quick connection device according to any one of claims 2 to 4, wherein the locking hook (12) comprises a hook body (122) and a hook claw (123) connected to form an L-shaped structure, the hook body (122) is connected to the second pin (62), and the hook claw (123) is used to engage with the first locking hook (11), in: The locking hook (12) rotates to a position where the hook body (122) is upward and the center of gravity of the locking hook (12) initially deviates from the first pin shaft (61) due to self-balance, which is a first critical position; the locking hook (12) rotates to a position where the hook body (122) is upward and the equivalent center of gravity of the locking hook (12) and the weight block (13) initially deviates from the first pin shaft (61) due to self-balance, which is a second critical position; and the first angle range is an angle range between the first critical position and the second critical position; and / or The locking hook (12) rotates to a position where the hook body (122) is upward and the equivalent center of gravity of the locking hook (12) and the gravity block (13) is initially deviated from the self-balance in a direction away from the first pin shaft (61) as a second critical position; the locking hook (12) rotates to a position where the hook body (122) is downward and the center of gravity of the locking hook (12) is initially deviated from the self-balance in a direction close to the first pin shaft (61) as a third critical position; the angle range between the second critical position and the third critical position is a second angle range; in the first unlocking state, the quick connecting device is within the second angle range; and in the first locking state, the quick connecting device is outside the second angle range.

6. The quick connection device according to any one of claims 2 to 5, further comprising a first linear drive component (51), a first end of which is connected to the first locking hook (11), and the first linear drive component (51) is used to drive the first locking hook (11) and the first tool pin shaft (102) to achieve engagement and separation.

7. The quick connection device according to any one of claims 2 to 6 further comprises a second locking hook (21) and a second locking component (2), wherein the second locking component (2) is used to lock the second tool pin (103) to the second locking hook (21), and the second locking state is independent of the state of the first locking component (1).

8. The quick connection device according to claim 7, in, In the preset direction (x), the first locking component (1) and the second locking component (2) are arranged side by side; and / or The quick connection device also includes a shell (3), and a protrusion (31) is provided in an area of ​​the shell (3) close to the first tool pin shaft (102). The protrusion (31) is arranged on a movement trajectory of the first tool pin shaft (102) to prevent the first tool pin shaft (102) from detaching, and the movement trajectory of the first tool pin shaft (102) to detach is an arc with the second tool pin shaft (103) as the center.

9. The quick connection device according to claim 7 or 8, further comprising a housing (3), wherein the second locking component (2) include: A third pin (63) extending along the preset direction (x); a locking block (22) rotatably connected to the third pin (63); in the second locking state, the locking block (22) is in a first position, and in the first position, the first end of the locking block (22) abuts against the second tool pin (103) to prevent the second tool pin (103) from being separated from the second locking hook (21); A second limiting member (42) is used to limit the first end of the locking block (22) to an extreme position of rotation in a direction away from the first tool pin shaft (102); and A first elastic member (23) is connected between the locking block (22) and the housing (3) and is used to apply an elastic force to the locking block (22) to rotate in a direction close to the second limiting member (42).

10. The quick connection device according to claim 9, further comprising a housing (3) and a fourth pin shaft (64) extending along the preset direction (x), the housing (3) being provided with a slideway (32), the fourth pin shaft (64) being movably connected to the housing (3) along the slideway (32), the locking block (22) further comprising a locking groove (24), the fourth pin shaft (64) being arranged in the locking groove (24) and the fourth pin shaft (64) being against an inner wall of the locking groove (24); in, The movement of the fourth pin shaft (64) is used to drive the locking block (22) to rotate around the third pin shaft (63). When the fourth pin shaft (64) moves along the slideway (32) from one end of the locking groove (24) close to the third pin shaft (63) to one end of the locking groove (24) away from the third pin shaft (63), the second locking component (2) switches from the second locking state to the second unlocking state.

11. The quick connection device according to claim 9 or 10, wherein in the second unlocked state, the locking block (22) rotates to a second position, and in the second position, the first end of the locking block (22) is spaced apart from the falling path of the second tool pin (103); Optionally, the quick connection device further comprises a housing (3), and the second locking component (2) further comprises a include: A first elastic member (23) is connected between the locking block (22) and the housing (3) and is used to apply an elastic force to the locking block (22) to rotate in a direction close to the second limiting member (42), wherein the elastic force of the first elastic member (23) at the first position of the locking block (22) is smaller than that at the second position.

12. The quick connection device according to claim 10, further comprising a first linear drive component (51) and a third limiter (43), wherein the first end of the first linear drive component (51) is connected to the first lock hook (11), the second end of the first linear drive component (51) is connected to the fourth pin (64), and the third limiter (43) is used to limit the first lock hook (11) to an extreme position of rotation in a direction away from the first tool pin (102); in, When the first locking component (1) is in a first unlocking state and the first linear driving component (51) is contracted to a preset length, the first locking hook (11) abuts against the third limiting component (43), and the first linear driving component (51) continues to contract to drive the fourth pin shaft (64) to move along the slideway (32).

13. The quick connection device according to any one of claims 1 to 6, comprising a second locking component (2), a first locking hook (11), a second locking hook (21), a housing (3) and a first linear driving component (51), wherein the housing (3) is provided with a slideway (32), and the second locking component (2) include: A third pin (63) extending along the preset direction (x); A locking block (22) rotatably connected to the third pin shaft (63), the locking block (22) comprising a locking groove (24), in the second locking state the locking block (22) is in a first position, the first end of the locking block (22) abuts against the second tool pin shaft (103) to prevent the second tool pin shaft (103) from being separated from the second locking hook (21); and a fourth pin (64) extending along the preset direction (x), arranged in the locking groove (24) and abutting against the inner wall of the locking groove (24), and movably connected to the housing (3) along the slideway (32); in the first position, the fourth pin (64) abuts against one end of the locking groove (24) close to the third pin (63); The first end of the first linear drive component (51) is connected to the fourth pin shaft (64), the second end of the first linear drive component (51) is connected to the first locking hook (11), and the first linear drive component (51) is configured to rotate and maintain the locking block (22) in the first position by extending, and to make the first locking hook (11) engage with the first tool pin shaft (102), thereby reaching the second locking state; Optionally, the locking groove (24) is in the shape of an oblong, an arc or a triangle.

14. The quick connection device according to claim 13, wherein when the fourth pin shaft (64) moves along the slide (32) from the end of the lock groove (24) close to the third pin shaft (63) to the end away from the third pin shaft (63), the locking block (22) rotates from the first position to the second position, and the second locking component (2) switches from the second locked state to the second unlocked state. In the second position, the first end of the locking block (22) is spaced apart from the falling path of the second tool pin shaft (103).

15. The quick connection device according to claim 14, wherein in the process of switching from the second locking state to the second unlocking state, F1*lc>F2*ld is satisfied; in, F1 is the pressure of the fourth pin shaft (64) on the inner surface of the locking groove (24), lc is the perpendicular distance from the center of the third pin shaft (63) to the straight line extending in the direction of F1, F2 is the friction force between the fourth pin shaft (64) and the inner surface of the locking groove (24), and ld is the distance between the center of the third pin shaft (63) and the point where the fourth pin shaft (64) applies force to the inner surface of the locking groove (24).

16. The quick connection device according to claim 14 or 15, further comprising a third limit member (43) for limiting the extreme position of the rotation of the first lock hook (11) in a direction away from the first tool pin shaft (102), and when the first linear drive component (51) is contracted to a preset length, the first lock hook (11) abuts against the third limit member (43), and the first linear drive component (51) continues to contract to drive the fourth pin shaft (64) to move along the slideway (32) in a direction away from the third pin shaft (63), so that the locking block (22) rotates from the first position to the second position; and / or The second locking member (2) also include: A first elastic member (23) is connected between the locking block (22) and the housing (3) and is used to apply an elastic force to the locking block (22) to maintain the locking block in the first position, wherein the elastic force of the first elastic member (23) at the first position of the locking block (22) is smaller than that at the second position.

17. The quick connection device according to any one of claims 13 to 16, further comprising a first locking component (1) and a first pin (61) extending along the preset direction (x), wherein a first end of the first locking hook (11) is rotatably connected to the first pin (61), a second end of the first locking hook (11) is connected to a second end of the first linear driving component (51), and the first locking component (1) include: A second elastic member (14) is sleeved on the first linear drive member (51), two ends of the second elastic member (14) respectively abut against the first end and the second end of the first linear drive member (51), and the second elastic member (14) is in a compressed state in the first locking state, so that the first linear drive member (51) is maintained in an extended state.

18. The quick connection device according to claim 17, in, The first end of the locking block (22) is provided with a groove (25) and is configured to abut against the second tool pin (103) when the first linear drive component (51) fails and the elastic force of the second elastic member (14) is insufficient, so as to prevent the second tool pin (103) from detaching from the second locking hook (21); and / or The first locking hook (11) comprises an extension portion (111) which protrudes from a hook claw portion of the first locking hook (11) so as to accommodate the first tool pin (102) when the first linear drive component (51) fails and the elastic force of the second elastic member (14) is insufficient, so as to prevent the first tool pin (102) from detaching from the first locking hook (11).

19. The quick connection device according to any one of claims 13 to 18, wherein the quick connection device further comprises a fourth stopper (44), configured to abut against the locking block (22) in the second locking state to keep the locking block (22) in the first position, the fourth stopper (44) include: A sixth pin (66) extending along the preset direction (x); A first section (441) is rotatably connected to the sixth pin shaft (66), and an end of the first section (441) away from the sixth pin shaft (66) abuts against the locking block (22) in the second locking state; A second section (442) fixedly connected to the first section (441) and rotatably connected to the sixth pin (66); and a third elastic member (443) configured to fix the position of at least one of the first section (441) and the second section (442) in the second locking state; In the process of switching from the second locked state to the second unlocked state, the first lock hook (11) contacts the end of the second section (442) away from the sixth pin shaft (66), and causes the second section (442) to rotate around the sixth pin shaft (66), so that the first section (441) rotates in a direction away from the third pin shaft (63).

20. An engineering machine, comprising a mounting base (104), a machine tool (101) and a quick connection device according to any one of claims 1 to 19, wherein the quick connection device connects the machine tool (101) to the mounting base (104); Optionally, the engineering machinery is an excavator, the tool (101) includes a bucket, the mounting base (104) includes a boom (105) and a connecting rod (106), the bucket is connected to the first end of the boom (105) and the first end of the connecting rod (106) via the quick connection device, and the second end of the connecting rod (106) is rotatably connected to the boom (105) via a rocker arm (107).

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