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 to a mounting base body, the quick connecting device comprises a locking assembly, the locking assembly comprises a locking block and a locking hook, the locking block comprises a first abutting arc surface, the locking hook comprises a second abutting arc surface, and the locking assembly is connected with the locking assembly; the locking block is configured to enable the first abutting arc surface to make abutting contact with the second abutting arc surface through rotation so as to lock the locking hook at a preset position, and then the first machine tool pin shaft is prevented from falling off through the locking hook; the state indication assembly is configured to indicate the state of the locking assembly according to the rotation angle position of the locking block; wherein under the condition that the locking hook is located at the preset position, the state of the locking assembly comprises a locking state and a virtual locking state, in the locking state, surface contact is formed between the first abutting arc surface and the second abutting arc surface, and in the virtual locking state, line contact or point contact is formed between the first abutting arc surface and the second abutting arc surface.

Description

Quick-connect devices and construction machinery Technical Field

[0001] This disclosure relates to the field of engineering machinery technology, and in particular to a quick connection device and engineering machinery. Background Technology

[0002] Excavators, as the most commonly used construction machinery in daily work, undertake a wide variety of operational functions. The application of multi-functional attachments is becoming increasingly widespread. Quick-connect devices, serving as the connection structure between the excavator boom and attachments, enable rapid switching and installation of various attachments, expanding the excavator's range of applications. This eliminates the time and manpower wasted on disassembling pins when changing attachments, thus improving work efficiency.

[0003] The most commonly used quick-connect device is the hydraulic quick-connect device, which uses a hydraulic cylinder to drive a locking mechanism to connect and disconnect from the machine. The quick-connect device includes a fixed hook and a movable hook. The fixed hook engages one pin of the machine, and the hydraulic cylinder drives the movable hook to engage the other pin. However, in actual use, it has been found that the existing quick-connect devices have low security when connecting the machine to the mounting base. The movable hook may appear to be in a locked position but cannot actually lock. If the construction machinery operates with the movable hook in this partially locked position, the pin may slip off the movable hook, leading to an accident. Summary of the Invention

[0004] This disclosure provides a quick-connect device and engineering machinery that can improve the safety of the connection between the machinery and the mounting base.

[0005] The first aspect of this disclosure provides a quick-connect device for connecting a tool to a mounting base. The tool includes a first tool pin extending along a predetermined direction. The quick-connect device includes:

[0006] A locking assembly includes a locking block and a locking hook. The locking block is rotatably connected to a first pin extending in a preset direction, and the locking hook is rotatably connected to a second pin extending in a preset direction. The locking block includes a first abutting arc surface, and the locking hook includes a second abutting arc surface. The locking block is configured to rotate to bring the first abutting arc surface into contact with the second abutting arc surface, thereby locking the locking hook in a preset position and preventing the first tool pin from falling off.

[0007] The status indicator component is configured to indicate the status of the locking component based on the rotation angle position of the locking block;

[0008] When the locking hook is in a preset position, the locking component has two states: a locked state and a loosely locked state. In the locked state, a surface contact is formed between the first abutting arc surface and the second abutting arc surface. In the loosely locked state, a line contact or a point contact is formed between the first abutting arc surface and the second abutting arc surface.

[0009] In some embodiments, the status indicator component is at least partially fixedly connected to the locking block and rotates synchronously with the locking block.

[0010] In some embodiments, the locking state includes a first locking state and a second locking state. In the first locking state, there is a first contact area between the first abutting arc surface and the second abutting arc surface, and the first contact area is less than a preset area. In the second locking state, there is a second contact area between the first abutting arc surface and the second abutting arc surface, and the second contact area is greater than or equal to the preset area.

[0011] In some embodiments, when the locking component is in a first locked state, the status indicator component presents a first indicator signal with a first level of prominence, and when the locking component is in a second locked state, the status indicator component presents a second indicator signal with a second level of prominence, the second level of prominence being stronger than the first level of prominence.

[0012] In some embodiments, the status indication component includes:

[0013] An indicator is configured to indicate the state of a locked component by changing its own position; and

[0014] A connector, which connects the locking block and the indicator, is configured to convert a change in the rotation angle of the locking block into a change in the position of the indicator.

[0015] In some embodiments, the status indication component further includes:

[0016] A guide is configured to provide guidance for changes in the position of the indicator so that the indicator moves along its own length direction. The guide is also configured to serve as a reference for changes in the position of the indicator.

[0017] In some embodiments, the indicator includes a cylindrical portion, and the guide includes a guide hole. The cylindrical portion is disposed within the guide hole. When the locking component is in a loosely locked state, the first end of the cylindrical portion is located within the guide hole. During the process of the locking component switching from a loosely locked state to a locked state, the first end of the cylindrical portion moves toward the direction of extending out of the guide hole. When the first end of the cylindrical portion extends out of the guide hole, the locking component is in a locked state.

[0018] In some embodiments, the locking state includes a first locking state and a second locking state. In the first locking state, there is a first contact area between the first abutting arc surface and the second abutting arc surface. The first contact area is smaller than a preset area. In the second locking state, there is a second contact area between the first abutting arc surface and the second abutting arc surface. The second contact area is greater than or equal to the preset area. In the second locking state, the larger the second contact area, the longer the length of the cylindrical portion extending out of the guide hole.

[0019] In some embodiments, the connector is a resilient connector, and the indicator further includes a clamping portion disposed at the second end of the cylindrical portion and configured to clamp at least a portion of the connector. The status indicator component further includes:

[0020] The limiting block is configured to abut against the connector when the locking component is in the second locked state, so as to increase the extension rate of the cylindrical part out of the guide hole by compressing the connector and changing the rotation axis and rotation radius of the connector.

[0021] In some embodiments, the connector includes:

[0022] The first connecting segment, its third end of which is fixedly connected to the locking block; and

[0023] The fifth end of the second connecting section is movably connected to the clamping part, and the fourth end of the first connecting section is elastically connected to the sixth end of the second connecting section. The third end and the fifth end are spaced apart along the extension direction of the cylindrical part.

[0024] During the process of the locking component switching from the first locking state to the second locking state, the limiting block abuts against the second connecting section, and the distance between the third end and the fifth end decreases along the extension direction of the cylindrical part.

[0025] In some embodiments, when the locking component is in a loose locking state or a first locking state, the rotation radius of the connector is a first rotation radius, which is the distance between the center of the first pin and the fifth end. When the locking component is in a second locking state, the rotation radius of the connector is a second rotation radius, which is the distance between the contact point of the second connecting segment and the limiting block and the fifth end. The first rotation radius is smaller than the second rotation radius.

[0026] In some embodiments, a connecting ring is provided between the fourth end and the sixth end, and the connecting ring is configured to reduce the stiffness of the first connecting segment and the second connecting segment under elastic compression.

[0027] In some embodiments, the limiting block is disposed on the side wall, and the side wall is also provided with a clearance hole, which is located below the limiting block and configured to clear the fourth end and the fifth end.

[0028] In some embodiments, the first tool pin presses against the locking block to drive the locking block to rotate. The locking block has a clearance portion on the side near the first tool pin, which is configured to clearance the first tool pin when the locking assembly is in a locked state.

[0029] A second aspect of this disclosure provides an engineering machine including the quick-connect device described in the above embodiments.

[0030] The quick connection device of this disclosure embodiment indicates the state of the locking component according to the rotation angle position of the locking block through the status indicator component. This enables the operator to correctly know the state of the locking component, eliminates the unlocked state and the false lock state of the locking component, guides the operator to work only in the locked state, avoids the first tool pin from slipping off the locking hook and causing accidents, and improves the safety of the connection between the tool and the mounting base. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:

[0032] Figure 1 is a schematic diagram of the structure of some embodiments of the locking component of the quick connection device of this disclosure in a loose locking state.

[0033] Figure 2 is an enlarged view of point A in Figure 1.

[0034] Figure 3 is a structural schematic diagram of some embodiments of the locking component of the quick-connect device of this disclosure in a locked state.

[0035] Figure 4 is an enlarged view of point B in Figure 3.

[0036] Figure 5 is a rendering of some embodiments of the locking component of the quick-connect device of this disclosure in a locked state.

[0037] Figure 6 is a structural schematic diagram of some embodiments of the locking component of the quick-connect device of this disclosure in a second locked state.

[0038] Figure 7 is an enlarged view of point C in Figure 6.

[0039] Figure 8 is a rendering of some embodiments of the locking component of the quick-connect device of this disclosure in a second locked state.

[0040] Figure 9 is a structural schematic diagram of some embodiments of the locking component of the quick-connect device of this disclosure in the unlocked state.

[0041] Figure 10 is an enlarged view of point D in Figure 9.

[0042] Figure 11 is a rendering of some embodiments of the locking component of the quick-connect device of this disclosure in an unlocked state.

[0043] Figure 12 is a schematic diagram of the overall structure of some embodiments of the quick connection device of this disclosure.

[0044] Figure 13 is a structural schematic diagram of some embodiments of the locking block and status indicator component of the quick connection device of this disclosure.

[0045] Figure 14 is a structural schematic diagram of some embodiments of the connector of the quick-connect device of this disclosure.

[0046] Figure 15 is a structural schematic diagram of some other embodiments of the connector of the quick-connect device of this disclosure.

[0047] Figure 16 is a schematic diagram of some embodiments of the first rotation radius of the connector of the quick-connect device of this disclosure.

[0048] Figure 17 is a schematic diagram of some embodiments of the first and second rotation radii of the connector of the quick-connect device of this disclosure.

[0049] Explanation of reference numerals in the attached figures:

[0050] 1. Locking component; 11. Locking block; 110. First abutting arc surface; 111. Clearance part; 12. Locking hook; 120. Second abutting arc surface; 2. Status indicator component; 21. Indicator; 211. Columnar part; 212. Clamping part; 22. Connector; 221. First connecting section; 222. Second connecting section; 223. Connecting ring; 23. Guide; 231. Guide hole; 24. Limiting block; 31. First pin; 32. Second pin; 100. Main body; 101. First tool pin; 102. Side wall; 103. Clearance hole; x. Preset direction; y. First direction; z. Second direction. Detailed Implementation

[0051] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The descriptions of the exemplary embodiments are merely illustrative and are in no way intended to limit the present disclosure or its application or use. The present disclosure may be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided so that the present disclosure will be thorough and complete, and will fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless specifically stated otherwise, the relative arrangement of components and steps, the composition of materials, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0052] The terms "first," "second," and similar words used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Words such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well. Terms such as "above," "below," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, this relative positional relationship may also change accordingly.

[0053] In this disclosure, when a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other devices without an intermediary device, or it may be not directly connected to the other devices but have an intermediary device.

[0054] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as a dictionary, should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and not as having an idealized or highly formalized meaning, unless expressly defined herein.

[0055] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0056] Based on the embodiments disclosed above, in the absence of explicit denial or conflict, the technical features of one embodiment may be advantageously combined with one or more other embodiments.

[0057] First, this disclosure proposes a quick-connect device for connecting a tool to a mounting base. The tool includes a first tool pin 101 extending along a preset direction x. The tool of the construction machinery is the working device, which can be a bucket, a breaker, or a hydraulic shear, etc. By changing different tools, the functions of the construction machinery can be expanded. The preset direction x can be the width direction of the tool. In Figures 1-11, 16, and 17, the preset direction x is a direction perpendicular to the plane of the paper.

[0058] In some embodiments, as shown in Figures 1 to 17, the quick-connect device includes:

[0059] Locking assembly 1 includes a locking block 11 and a locking hook 12. The locking block 11 is rotatably connected to a first pin 31 extending in a preset direction x, and the locking hook 12 is rotatably connected to a second pin 32 extending in the preset direction x. The locking block 11 includes a first abutting arc surface 110, and the locking hook 12 includes a second abutting arc surface 120. The locking block 11 is configured to rotate so that the first abutting arc surface 110 abuts against the second abutting arc surface 120 to lock the locking hook 12 in a preset position, thereby preventing the first tool pin 101 from falling off.

[0060] Status indicator component 2 is configured to indicate the status of locking component 1 based on the rotation angle position of locking block 11;

[0061] When the locking hook 12 is in a preset position, the locking component 1 has a locked state and a loosely locked state. In the locked state, the first abutting arc surface 110 and the second abutting arc surface 120 form a surface contact. In the loosely locked state, the first abutting arc surface 110 and the second abutting arc surface 120 form a line contact or a point contact.

[0062] The locking component 1 also includes an unlocked state. In the unlocked state, the first abutting arc surface 110 and the second abutting arc surface 120 are spaced apart, and the locking hook 12 can rotate freely, meaning it can rotate to a position other than a preset position. Correspondingly, since the semi-locked state is not a true locked state of the locking component 1, the locking hook 12 can also rotate to a position other than a preset position in the semi-locked state. When the locking hook 12 is not in the preset position, the locking component 1 is in the unlocked state, as shown in Figures 9-11.

[0063] The first abutting arc surface 110 and the second abutting arc surface 120 form a surface contact, or in other words, the locking block 11 and the locking hook 12 engage, which can lock the locking hook 12 in a preset position, so that the locking assembly 1 is in a locked state. When the locking hook 12 is locked in the preset position, the claw of the locking hook 12 is locked on the disengagement path of the first tool pin 101.

[0064] In Figures 1-11, 16, and 17, during the clockwise rotation of the locking block 11, the locking assembly 1 is sequentially in an unlocked state, a loosely locked state, and a locked state. The first tool pin 101 presses the locking block 11 within the receiving channel to achieve the clockwise rotation of the locking block 11. During the counterclockwise rotation of the locking block 11, the locking assembly 1 is sequentially in a locked state, a loosely locked state, and an unlocked state. The counterclockwise rotation of the locking block 11 can be achieved by a driving component (not shown in the figures).

[0065] In actual working scenarios, locking component 1 is in the unlocked state, as shown in Figures 9-11. Locking hook 12 is generally not in the preset position. During the installation of the tool, the first tool pin 101 presses the locking block 11 in the receiving channel, and the locking block 11 rotates clockwise, causing the locking hook 12 to rotate counterclockwise to the preset position. As shown in Figures 1 and 2, the locking block 11 and the locking hook 12 only contact at position G, and locking component 1 is in a loosely locked state. Since the locking hook 12 is already in the preset position, the operator may easily mistakenly believe that locking component 1 is in the locked state, which poses a great safety hazard. This disclosure can avoid this problem by setting a status indicator component 2, thereby improving the safety of the connection between the tool and the installation base.

[0066] The locking block 11 is fixed to and rotates synchronously with the first pin 31. The rotation angle of the locking block 11 is different in the unlocked, loosely locked, and locked states. Along the direction away from the side wall 102, or in other words, along the first direction y, the end of the locking block 11 away from the first pin 31 gradually approaches the side wall 102 in the unlocked, loosely locked, and locked states. The first direction y is perpendicular to the preset direction x. The status indication component 2 can indicate the status of the locking component 1 according to the rotation angle of the locking block 11, enabling the operator to know the actual status of the locking component 1 and improving the safety of the connection between the machine and the mounting base. Whether the locking component 1 is in the unlocked, loosely locked, or locked state depends on the rotation angle of the locking block 11. To clearly illustrate the content of this disclosure, the state of the locking component 1 in the subsequent embodiments of this disclosure will also be described as the state of the locking block 11.

[0067] Optionally, the status indication component 2 indicates the status of the locking component 1 based on the rotational angle position of the locking block 11. In the first case, the status indication component 2 first acquires the rotational angle position of the locking block 11, and then indicates the status of the locking component 1 based on the rotational angle position of the locking block 11. The status indication component 2 can acquire the rotational angle position of the locking block 11 using contact or non-contact methods, such as using a contact or non-contact rotational angle sensor. The non-contact rotational angle sensor can be a visual measurement or a magnetoelectric angle sensor, etc. In the second case, the status indication component 2 acquires the rotational angle position of the locking block 11 and indicates the status of the locking component 1 based on the rotational angle position of the locking block 11 simultaneously. For example, a motion conversion structure is used to convert the rotational motion of the locking block 11 into a position change of the indicator. To clearly illustrate the content of this disclosure, the following embodiments of this disclosure will be described using the second case as an example.

[0068] Optionally, the status indicator component 2 can adopt any form of indication method such as sound, light, or electricity, for example, a conspicuous visual indication method.

[0069] The quick connection device of this embodiment indicates the status of the locking component 1 according to the rotation angle position of the locking block 11 through the status indicator component 2. This enables the operator to know the status of the locking component 1 correctly, eliminates the unlocked state and the loose lock state of the locking component 1, and guides the operator to work only in the locked state. This can prevent the first tool pin 101 from slipping off the locking hook 12 and causing an accident, and improve the safety of the connection between the tool and the mounting base.

[0070] In some embodiments, two sets of locking components 1 are arranged at intervals along a preset direction x, and therefore two locking blocks 11 are arranged at intervals along the preset direction x, with the status indicator component 2 located between the two locking blocks 11 along the preset direction x.

[0071] In some embodiments, as shown in Figures 1 to 17, the status indicator component 2 is at least partially fixedly connected to the locking block 11 and rotates synchronously with the locking block 11.

[0072] In this embodiment, the status indicator component 2 is at least partially fixedly connected to the locking block 11 and rotates synchronously with the locking block 11. It measures the rotation angle of the locking block 11 by contact or converts the rotational movement of the locking block 11 by contact, which can make the measurement results or conversion results more accurate and further improve the safety of the connection between the machine and the mounting base. At the same time, the fixed connection and synchronous rotation also help to simplify the composition structure of the status indicator component 2.

[0073] In some embodiments, as shown in Figures 3 to 8, the locking state includes a first locking state and a second locking state. In the first locking state, there is a first contact area between the first abutting arc surface 110 and the second abutting arc surface 120, and the first contact area is smaller than a preset area. In the second locking state, there is a second contact area between the first abutting arc surface 110 and the second abutting arc surface 120, and the second contact area is greater than or equal to the preset area.

[0074] Because the contact areas between the first abutting arc surface 110 and the second abutting arc surface 120 are different, the locking strength of the locking component 1 on the first tool pin 101 differs in the first and second locking states. The locking strength of the locking component 1 on the first tool pin 101 in the first locking state is weaker than that in the second locking state. In other words, the locking effect of the locking block 11 on the locking hook 12 in the first locking state is weaker than that in the second locking state. However, regardless of whether the locking block 11 or the locking component 1 is in the first or second locking state, it can still provide a locking function. The locking component 1 in the second locking state improves connection security, while the locking component 1 in the first locking state allows for faster and more flexible tool replacement.

[0075] This embodiment further subdivides the locking state into a first locking state and a second locking state. The state indicator component 2 can indicate the state of the locking component 1 and the strength of the locking action of the locking component 1 according to the rotation angle position of the locking block 11. This allows the operator to select whether the locking component 1 is in the first locking state or the second locking state. When the locking component 1 is in the second locking state, the safety of the connection between the machine and the mounting base is further improved.

[0076] In some embodiments, the dividing point between the first locking state and the second locking state is the state shown in Figures 3 to 5, that is, the state in which the connector 22 is rotated to the point where it just contacts the limiting block 24 at position F, or in other words, in the state shown in Figures 3 to 5, the contact area between the first abutting arc surface 110 and the second abutting arc surface 120 is a preset area.

[0077] The first locking state can be the state between the position shown in Figure 2 (excluding) and the position shown in Figure 4 (including). The second locking state can be the state between the position shown in Figure 4 (excluding) and the position shown in Figure 7 (including). For clarity, the position of the locking block 11 shown in Figure 7 can also be referred to as the final locking position. Specifically, when the locking block 11 is in the final locking position, the contact area between the first abutting arc surface 110 and the second abutting arc surface 120 is the largest, and the connection security between the tool and the mounting base is the highest. Optionally, the position of the locking block 11 shown in Figure 4 can also be classified as the second locking state.

[0078] In some embodiments, when the locking component 1 is in a first locked state, the status indicator component 2 presents a first indicator signal with a first level of prominence, and when the locking component 1 is in a second locked state, the status indicator component 2 presents a second indicator signal with a second level of prominence, the second level of prominence being stronger than the first level of prominence.

[0079] This embodiment, by presenting a first indicator signal with a first level of prominence and a second indicator signal with a second level of prominence, can clearly indicate to the operator that the current state of the locking component 1 is either a first locking state with lower locking strength and lower security, or a second locking state with higher locking strength and higher security. This allows the operator to choose whether to place the locking component 1 in the first or second locking state, and further improves the security of the connection between the tool and the mounting base when the locking component 1 is in the second locking state.

[0080] In some embodiments, as shown in Figures 1 to 17, the status indication component 2 includes:

[0081] Indicator 21 is configured to indicate the state of locking component 1 by changing its own position; and

[0082] Connector 22, connected between locking block 11 and indicator 21, is configured to convert the rotation angle change of locking block 11 into the position change of indicator 21.

[0083] Specifically, the locking block 11 is fixed to and rotates synchronously with the first pin 31. The end of the connecting member 22 near the locking block 11 is fixedly connected to the first pin 31, so that the end of the connecting member 22 near the locking block 11 rotates synchronously with the locking block 11. The end of the connecting member 22 near the indicator 21 is movably connected to the indicator 21. Optionally, the connecting member 22 can adopt a suitable connecting structure such as a non-circular spring.

[0084] In this embodiment, the indicator 21 and the connector 22 work together, resulting in a simple and reliable structure. By converting the rotation angle change of the locking block 11 into the position change of the indicator 21, the conversion result can be made more accurate, further improving the safety of the connection between the machine and the mounting base.

[0085] In some embodiments, as shown in Figures 1 to 17, the status indication component 2 further includes:

[0086] The guide 23 is configured to provide guidance for the positional change of the indicator 21 so that the indicator 21 moves along its own length direction, and the guide 23 is also configured to serve as a reference for the positional change of the indicator 21.

[0087] The guide member 23 is installed on the main body 100 of the quick-connect device. The guide member 23 can move the indicator member 21 along the extension direction of its main body, which may be a cylindrical part or the like. Optionally, the length direction of the indicator member 21 may be a first direction y, or other optional and suitable directions, such as other directions intersecting the first direction y. The length direction of the indicator member 21 is also limited to a straight line direction, or it may be an arc direction or the like.

[0088] In this embodiment, the guide 23 moves along its own length direction by constraining the indicator 21, which can prevent the indicator 21 from shifting or deviating during the movement process and improve the accuracy of the rotational motion conversion result of the locking block 11. The guide 23 can integrate guidance and reference, which can facilitate the operator to make accurate visual judgment on the status of the locking component 1, and can also simplify the structure of the status indicator component 2 and reduce the space occupied by the status indicator component 2.

[0089] In some embodiments, as shown in Figures 1 to 17, the indicator 21 includes a cylindrical portion 211 and the guide 23 includes a guide hole 231. The cylindrical portion 211 is disposed in the guide hole 231. When the locking component 1 is in a loosely locked state, the first end of the cylindrical portion 211 is located in the guide hole 231. During the process of the locking component 1 switching from a loosely locked state to a locked state, the first end of the cylindrical portion 211 moves toward the direction of extending out of the guide hole 231. When the first end of the cylindrical portion 211 extends out of the guide hole 231, the locking component 1 is in a locked state.

[0090] The guide hole 231 is fixed to the main body 100 of the quick-connect device. The first end face of the cylindrical part 211 is position I in the figure, and the end face of the outlet of the guide hole 231 is position H in the figure. When the locking block 11 is in the unlocked state and the loosely locked state, the first end of the cylindrical part 211 is located inside the guide hole 231, that is, position I is located to the left of position H, and the operator cannot see the first end of the cylindrical part 211. When the first end of the cylindrical part 211 extends to be flush with or slightly protruding from the outlet of the guide hole 231, that is, position I is flush with position H or position I is slightly to the right of position H, the locking block 11 is in the locked state.

[0091] Position I is aligned with or slightly to the right of position H, at which point the operator can first see the first end of the cylindrical part 211. That is, when the operator first sees the first end of the cylindrical part 211, they can know that the locking component 1 is in the locked state. More specifically, position I being aligned with or slightly to the right of position H marks the boundary between the first and second locked states of the locking block 11.

[0092] This embodiment indicates the state of the locking component 1 by the relative change in the position of the first end of the cylindrical part 211 and the outlet position of the guide hole 231. The structure is simple and reliable, easy for operators to observe and attract their attention, and helps to improve the safety of the connection between the tool and the mounting base.

[0093] In some embodiments, the indicator 21 is coated with a bright color to further attract the operator's attention, especially the area of ​​the indicator 21 that is directly displayed to the operator near the first end.

[0094] In some embodiments, the locking state includes a first locking state and a second locking state. In the first locking state, there is a first contact area between the first abutting arc surface 110 and the second abutting arc surface 120. The first contact area is smaller than a preset area. In the second locking state, there is a second contact area between the first abutting arc surface 110 and the second abutting arc surface 120. The second contact area is greater than or equal to the preset area. In the second locking state, the larger the second contact area, the longer the length of the cylindrical portion 211 extending out of the guide hole 231.

[0095] This embodiment, by increasing the second contact area and extending the cylindrical part 211 beyond the guide hole 231, can clearly indicate to the operator the current state of the locking component 1. That is, when the first end of the cylindrical part 211 just appears, it is in the first locking state; when the first end of the cylindrical part 211 extends significantly, it is in the second locking state. The difference in the degree of visibility allows the operator to choose whether to put the locking component 1 in the first or second locking state. When the locking component 1 is in the second locking state, the safety of the connection between the tool and the mounting base is further improved.

[0096] In some embodiments, a limiting portion is provided between the second end of the cylindrical portion 211 and the guide hole 231 to limit the extreme position that the first end of the cylindrical portion 211 can extend. This extreme position corresponds to the locking block 11 being in the final locked position, which can improve the locking strength of the locking assembly 1 and limit the clockwise rotation of the locking block 11 to avoid the connector 22 exceeding the elastic limit or the locking block 11 interfering with the side wall 102.

[0097] In some embodiments, as shown in Figures 1 to 17, the connector 22 is an elastic connector, and the indicator 21 further includes a clamping portion 212, which is disposed at the second end of the cylindrical portion 211 and configured to clamp at least a portion of the connector 22. The status indicator assembly 2 further includes:

[0098] The limiting block 24 is configured to abut against the connector 22 when the locking component 1 is in the second locked state, so as to increase the extension rate of the columnar portion 211 out of the guide hole 231 by compressing the connector 22 and changing the rotation axis and rotation radius of the connector 22.

[0099] The clamping part 212 is fixedly connected to the second end of the cylindrical part 211. The clamping part 212 may be a groove clamping structure extending along the second direction z. The second direction z is perpendicular to the preset direction x and the first direction y. At least a portion of the connecting member 22 is movably connected to the clamping part 212.

[0100] Because the movement direction of the cylindrical part 211 is constrained by the guide hole 231, the connecting member 22 can convert the rotational motion of the locking block 11 into the translational motion of the cylindrical part 211 along the first direction y. During the rotation of the connecting member 22, the connecting member 22 abuts against the limiting block 24. By elastically compressing the connecting member 22, the rotation axis and rotation radius of the connecting member 22 can be changed, for example, by increasing the rotation radius. This allows the cylindrical part 211 to quickly extend out of the guide hole 231 in a short time, that is, the I position moves rapidly to the right relative to the H position along the first direction y. This provides a strong visual indication to the operator. After the first end of the cylindrical part 211 moves rapidly to the right, it indicates that the locking block 11 is in or close to the final locked position, thereby improving the safety of the connection between the tool and the mounting base.

[0101] The material and structure of the elastic connector 22 should ensure that it undergoes normal elastic deformation throughout the entire contact rotation process and does not produce plastic deformation. The rotation of the elastic connector 22 after contacting the limit block 24 can amplify the movement of the indicator 21 and significantly increase the extension rate of the columnar part 211 out of the guide hole 231.

[0102] In some embodiments, as shown in Figures 14 and 15, the connector 22 includes:

[0103] The first connecting segment 221, its third end of which is fixedly connected to the locking block 11; and

[0104] The fifth end of the second connecting segment 222 is movably connected to the clamping part 212, and the fourth end of the first connecting segment 221 is elastically connected to the sixth end of the second connecting segment 222. The third end and the fifth end are spaced apart along the extending direction of the cylindrical part 211.

[0105] During the process of the locking component 1 switching from the first locking state to the second locking state, the limiting block 24 abuts against the second connecting section 222, and the distance between the third end and the fifth end decreases along the extension direction of the cylindrical part 211.

[0106] The third end of the first connecting segment 221 may be provided with a first bent segment extending along a preset direction x. The first bent segment is fixedly connected to the locking block 11. The fifth end of the second connecting segment 222 may be provided with a second bent segment extending along a preset direction x. The clamping part 212 clamps the second bent segment. When two locking blocks 11 are arranged at intervals along the preset direction x, the connector 22 may include two symmetrically arranged first connecting segments 221 and two second connecting segments 222. The two first connecting segments 221 are respectively connected to the locking blocks 11 on both sides, and the second bent segment is connected between the two second connecting segments 222.

[0107] During the process of the locking component 1 switching from the first locking state to the second locking state, along the first direction y, due to the squeezing action of the limiting block 24 on the second connecting section 222, the distance between the third end and the fifth end is reduced. This elastic compression increases the extension rate of the cylindrical part 211 out of the guide hole 231 along the first direction y.

[0108] When the clamping part 212 is a groove clamping structure extending along the second direction z, the fifth end or the second bent section of the second connecting section 222 is limited by the clamping part 212 and can only move up and down along the second direction z in the groove. During the process of the locking component 1 switching from the first locking state to the second locking state, the connecting part 22 rotates clockwise with the center of the first pin 31 as the center, and then rotates clockwise with the abutment point F of the second connecting section 222 and the limiting block 24 as the center. During the above process, the fifth end or the second bent section (J position) moves to the right in the first direction y, and may move upward, remain stationary, or move downward in the second direction z. That is, the fifth end or the second bent section (J position) exhibits a compound movement along the second direction z in the groove of the clamping part 212 according to the specific structural dimensions of the state indicator component 2.

[0109] In some embodiments, as shown in Figures 16 and 17, when the locking component 1 is in a loose lock state or a first locked state, the rotation radius of the connector 22 is a first rotation radius, which is the distance between the center of the first pin 31 and the fifth end. When the locking component 1 is in a second locked state, the rotation radius of the connector 22 is a second rotation radius, which is the distance between the contact point of the second connecting segment 222 and the limiting block 24 and the fifth end. The first rotation radius is smaller than the second rotation radius.

[0110] The trajectory circle K is a circle with the first pin 31 as the center and the distance between the center of the first pin 31 and the fifth end (J position) as the first rotation radius. The trajectory circle L is a circle with the contact point F between the second connecting segment 222 and the limiting block 24 as the center and the distance between the contact point F between the second connecting segment 222 and the limiting block 24 and the fifth end (J position) as the second rotation radius.

[0111] During the process of switching the locking component 1 from the first locking state to the second locking state, because the limiting block 24 changes the rotation center of the second connecting segment 222, the slight rotation of the first pin 31 or the locking block 11 will cause the fifth end (J position) to produce a large displacement. Therefore, the connecting member 22 can drive the cylindrical part 211 to move quickly to the right along the guide hole 231 through the clamping part 212, thereby increasing the extension rate of the cylindrical part 211 out of the guide hole 231 along the first direction y.

[0112] In some embodiments, as shown in FIG15, a connecting ring 223 is provided between the fourth end and the sixth end. The connecting ring 223 is configured to reduce the stiffness of the first connecting segment 221 and the second connecting segment 222 under elastic compression.

[0113] By setting a connecting ring 223 between the fourth end of the first connecting section 221 and the fifth end of the second connecting section 222, the connector 22 is made easier to bend, thereby producing a greater deformation effect. This further enhances the amplification effect of the connector 22 on the rotation of the locking block 11, provides operators with clearer visual instructions, and improves the safety of the connection between the tool and the mounting base.

[0114] In some embodiments, as shown in Figures 16 and 17, a limiting block 24 is provided on a side wall 102, and a clearance hole 103 is also provided on the side wall 102. The clearance hole 103 is located below the limiting block 24 and is configured to clear the fourth end and the fifth end.

[0115] The clearance hole 103 in this embodiment can prevent the fourth and fifth ends from squeezing the side wall 102 and causing structural interference. Squeezing the side wall 102 by the fourth and fifth ends will cause the rotation center of the connector 22 to change, affecting the amplification effect of the connector 22 on the rotation of the locking block 11 in the aforementioned embodiment.

[0116] In some embodiments, as shown in Figures 1 to 17, the first tool pin 101 presses the locking block 11 to drive the locking block 11 to rotate. The locking block 11 is provided with a clearance portion 111 on the side near the first tool pin 101. The clearance portion 111 is configured to clearance the first tool pin 101 when the locking assembly 1 is in the locked state.

[0117] The clearance part 111 is provided so that the locking block 11 forms a protruding structure E position on the side near the first tool pin 101. In the unlocked state, the first tool pin 101 presses the clearance part 111 as it moves to the left. After the locking block 11 rotates clockwise to the loose lock state or the locked state, the first tool pin 101 continues to press the protruding structure E position as it moves to the left. The clearance part 111 is provided so that the first tool pin 101 can smoothly enter the inner side of the pin receiving cavity, avoiding structural interference between the locking block 11 and the first tool pin 101.

[0118] The working process of the quick connection device of this disclosure connecting the tool is described below with reference to some specific embodiments in conjunction with Figures 1 to 17:

[0119] As shown in Figures 9 to 11, the locking component 1 is in the unlocked state, the locking hook 12 is not in the preset position, and the first tool pin 101 and the locking block 11 are spaced apart along the first direction y. During the installation of the tool, the first tool pin 101 continuously moves to the left and contacts the clearance part 111 of the locking block 11, causing the locking block 11 to rotate clockwise. When the locking block 11 rotates clockwise to contact the locking hook 12 at position G, the locking hook 12 is in the preset position, as shown in Figures 1 and 2, and the locking component 1 is in a loosely locked state.

[0120] The first tool pin 101 continues to move to the left and contacts the locking block 11 at the protruding structure E position, pushing the locking block 11 to continue to rotate clockwise. The locking block 11 is fixedly connected to the first pin 31 and the connecting member 22. The connecting member 22 is an elastic connecting member. As the locking block 11 rotates clockwise, the connecting member 22 rotates with the first pin 31 as the center and the distance between the center of the first pin 31 and the fifth end (J position) of the second connecting section 222 as the first rotation radius, thereby driving the fifth end to move slowly to the right. When the first end of the cylindrical part 211 extends to be flush with or slightly protruding from the outlet of the guide hole 231, that is, when position I is flush with position H or position I is slightly to the right of position H, the operator can know that the locking component 1 is in the locked state when he sees the first end of the cylindrical part 211 for the first time. More specifically, the locking component 1 is at the dividing point between the first locked state and the second locked state, as shown in Figures 3 to 5.

[0121] When the locking component 1 is at the state boundary point, the second connecting segment 222 of the connector 22 abuts against the limiting block 24 on the side wall 102 at position F. The center and radius of the rotation of the fifth end (position J) change. The center becomes the contact point F between the second connecting segment 222 and the limiting block 24, and the radius becomes the second rotation radius, which is the distance between the contact point F and the fifth end (position J). The second rotation radius is greater than the first rotation radius. This change in the center and rotation radius causes a slight rotation of the first pin 31 or the locking block 11 to cause a large displacement of the fifth end (position J). Therefore, the connector 22 can drive the cylindrical part 211 to move quickly to the right along the guide hole 231 through the clamping part 212, thereby increasing the extension rate of the cylindrical part 211 out of the guide hole 231 in the first direction y.

[0122] As the locking block 11 continues to rotate clockwise, the gap between the third and fifth ends is reduced due to the squeezing action of the limiting block 24 on the second connecting section 222. This elastic compression increases the extension rate of the cylindrical part 211 out of the guide hole 231 along the first direction y.

[0123] The combined effect of elastic compression and increased rotation radius causes the cylindrical part 211 to suddenly and rapidly extend out of the guide hole 231 along the first direction y, that is, the I position rapidly moves to the right away from the H position, or in other words, the I position clearly protrudes from the H position in a static state. This provides the operator with a very clear visual indication. After seeing this visual indication, the operator knows that the locking block 11 is in or close to the final locking position, or in other words, after seeing this visual indication, the operator knows that the quick connection device is in the state shown in Figures 6 to 8. At this time, the locking block 11 and the locking hook 12 are in complete contact at the abutting arc surface. The locking block 11 can completely restrict the rotation of the locking hook 12, and the locking component 1 can prevent the first tool pin 101 from moving to the right, thereby improving the safety of the connection between the tool and the mounting base.

[0124] Secondly, this disclosure also provides an engineering machine, including the quick connection device of the above embodiments.

[0125] In this embodiment of the construction machinery, the quick-connect device indicates the status of the locking component 1 according to the rotation angle position of the locking block 11 through the status indicator component 2. This enables the operator to correctly know the status of the locking component 1, eliminate the unlocked state and the loose lock state of the locking component 1, and guide the operator to work only in the locked state. This can prevent the first tool pin 101 from slipping off the locking hook 12 and causing an accident, improve the safety of the connection between the tool and the mounting base, and greatly improve the safety of the construction machinery during operation.

[0126] The foregoing has provided a detailed description of a quick-connection device and engineering machinery provided by this disclosure. Specific embodiments have been used to illustrate the principles and implementation methods of this disclosure. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this disclosure. It should be noted that those skilled in the art can make various improvements and modifications to this disclosure without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this disclosure.

Claims

1. A quick-connect device, characterized in that, For connecting a tool to a mounting base, the tool includes a first tool pin (101) extending along a preset direction (x). The quick-connect device includes a locking assembly (1) comprising a locking block (11) and a locking hook (12). The locking block (11) is rotatably connected to the first pin (31) extending along the preset direction (x), and the locking hook (12) is rotatably connected to a second pin (32) extending along the preset direction (x). The locking block (11) includes a first abutting arc surface (110), and the locking hook (12) includes a second abutting arc surface (120). The locking block (11) is configured to rotate so that the first abutting arc surface (110) and the second abutting arc surface (120) are aligned. The locking component (1) is configured to engage with the locking hook (12) to lock it in a preset position, thereby preventing the first tool pin (101) from falling off; and a status indicator component (2) is configured to indicate the status of the locking component (1) according to the rotation angle position of the locking block (11); wherein, when the locking hook (12) is in the preset position, the status of the locking component (1) includes a locked state and a loose locked state. In the locked state, a surface contact is formed between the first abutting arc surface (110) and the second abutting arc surface (120). In the loose locked state, a line contact or a point contact is formed between the first abutting arc surface (110) and the second abutting arc surface (120).

2. The quick connection device according to claim 1, characterized in that, The status indicator component (2) is at least partially fixedly connected to the locking block (11) and rotates synchronously with the locking block (11).

3. The quick connection device according to claim 1, characterized in that, The locking state includes a first locking state and a second locking state. In the first locking state, there is a first contact area between the first abutting arc surface (110) and the second abutting arc surface (120), and the first contact area is less than a preset area. In the second locking state, there is a second contact area between the first abutting arc surface (110) and the second abutting arc surface (120), and the second contact area is greater than or equal to the preset area.

4. The quick connection device according to claim 3, characterized in that, When the locking component (1) is in the first locked state, the status indicator component (2) presents a first indicator signal with a first degree of prominence. When the locking component (1) is in the second locked state, the status indicator component (2) presents a second indicator signal with a second degree of prominence, the second degree of prominence being stronger than the first degree of prominence.

5. The quick connection device according to claim 1, characterized in that, The status indication component (2) includes: an indicator (21) configured to indicate the status of the locking component (1) by changing its own position; and a connector (22) connected between the locking block (11) and the indicator (21), the connector (22) being configured to convert the rotation angle change of the locking block (11) into a position change of the indicator (21).

6. The quick connection device according to claim 5, characterized in that, The status indication component (2) further includes a guide (23) configured to provide guidance for positional changes of the indicator (21) to move the indicator (21) along its own length direction, and the guide (23) is also configured to serve as a reference for positional changes of the indicator (21).

7. The quick connection device according to claim 6, characterized in that, The indicator (21) includes a cylindrical portion (211), and the guide (23) includes a guide hole (231). The cylindrical portion (211) is disposed in the guide hole (231). When the locking assembly (1) is in the loose locking state, the first end of the cylindrical portion (211) is located in the guide hole (231). During the process of the locking assembly (1) switching from the loose locking state to the locked state, the first end of the cylindrical portion (211) moves toward the direction of extending out of the guide hole (231). When the first end of the cylindrical portion (211) extends out of the guide hole (231), the locking assembly (1) is in the locked state.

8. The quick connection device according to claim 7, characterized in that, The locking state includes a first locking state and a second locking state. In the first locking state, there is a first contact area between the first abutting arc surface (110) and the second abutting arc surface (120), and the first contact area is smaller than a preset area. In the second locking state, there is a second contact area between the first abutting arc surface (110) and the second abutting arc surface (120), and the second contact area is greater than or equal to the preset area. In the second locking state, the larger the second contact area, the longer the cylindrical part (211) extends out of the guide hole (231).

9. The quick connection device according to claim 8, characterized in that, The connector (22) is an elastic connector, and the indicator (21) further includes a clamping part (212), which is disposed at the second end of the cylindrical part (211) and configured to clamp at least a portion of the connector (22). The status indicator component (2) further includes a limiting block (24), which is configured to abut against the connector (22) when the locking component (1) is in the second locking state, so as to increase the extension rate of the cylindrical part (211) out of the guide hole (231) by compressing the connector (22) and changing the rotation axis and rotation radius of the connector (22).

10. The quick-connect device according to claim 9, characterized in that, The connector (22) includes: a first connecting segment (221), the third end of which is fixedly connected to the locking block (11); and a second connecting segment (222), the fifth end of which is movably connected to the clamping part (212), the fourth end of the first connecting segment (221) is elastically connected to the sixth end of the second connecting segment (222), and the third end and the fifth end are spaced apart along the extension direction of the cylindrical part (211); wherein, during the process of the locking component (1) switching from the first locking state to the second locking state, the limiting block (24) abuts against the second connecting segment (222), and the distance between the third end and the fifth end decreases along the extension direction of the cylindrical part (211).

11. The quick-connect device according to claim 10, characterized in that, When the locking component (1) is in the false locking state or the first locking state, the rotation radius of the connector (22) is the first rotation radius, which is the distance between the center of the first pin (31) and the fifth end. When the locking component (1) is in the second locking state, the rotation radius of the connector (22) is the second rotation radius, which is the distance between the contact point of the second connecting segment (222) and the limiting block (24) and the fifth end. The first rotation radius is smaller than the second rotation radius.

12. The quick-connect device according to claim 10, characterized in that, A connecting ring (223) is provided between the fourth end and the sixth end. The connecting ring (223) is configured to reduce the stiffness of the first connecting segment (221) and the second connecting segment (222) under elastic compression.

13. The quick-connect device according to claim 10, characterized in that, The limiting block (24) is provided on the side wall (102), and the side wall (102) is also provided with a clearance hole (103). The clearance hole (103) is located below the limiting block (24) and is configured to avoid the fourth end and the fifth end.

14. The quick-connect device according to any one of claims 1 to 13, characterized in that, The first tool pin (101) presses the locking block (11) to drive the locking block (11) to rotate. The locking block (11) has a clearance part (111) on the side near the first tool pin (101). The clearance part (111) is configured to clearance the first tool pin (101) when the locking assembly (1) is in the locked state.

15. An engineering machinery, characterized in that, Includes the quick connection device as described in any one of claims 1 to 14.

Images