Quick connector with safety lock, method of connecting, working device and engineering machine

Abstract

The application discloses a quick connector with a safety lock, a connecting method, a working device and an engineering machine, which comprises a shell, a first locking component, a second locking component and a power component; the first locking component is installed at the lower part of the shell and can perform axial linear reciprocating motion in the shell to realize locking and unlocking of a rear pin shaft of a machine tool; the second locking component is installed at the lower part of the shell and can perform rotating motion with a hinge point as the center in the shell to realize locking and unlocking of a front pin shaft of the machine tool; the power component is arranged at the lower part of the shell and comprises an extension part and a fixed part; the extension part is hinged to the first locking component; and the fixed part is hinged to the second locking component. The application can ensure that a driver can complete replacement of the machine tool through the quick connector in the excavator and realize automatic locking and unlocking. Meanwhile, the quick connector has two independent locking systems, which effectively ensure the safety of the excavator.

Description

Technical Field

[0001] The invention relates to a quick connector with a safety lock, belonging to the technical field of quick connectors. Background Art

[0002] Excavators, the most commonly used construction machinery in daily construction, perform a wide variety of tasks. Multifunctional tools are also becoming increasingly popular. Quick couplers, used as connectors between excavators and working devices (buckets, breakers, hydraulic shears, etc.), enable rapid switching and installation of various working devices, expanding the excavator's range of use, eliminating the time and labor associated with replacing and disassembling attachment pins, and improving work efficiency.

[0003] The most commonly used quick connector is a hydraulic one, which uses a hydraulic cylinder to drive a locking mechanism to connect and disconnect the attachment. The commonly used semi-automatic hydraulic quick connector has a fixed hook and a movable hook. After the fixed hook engages the second connecting pin of the working device, it drives the hydraulic cylinder, causing the movable hook to engage the first connecting pin of the working device, thereby grabbing and connecting the working device.

[0004] When the fixed hook hooks the second connecting pin of the working device, due to the limited engagement range and weak engagement, the second connecting pin of the working device is in a semi-exposed state. The hydraulic cylinder is operated to connect the movable hook with the working device. The operator needs to manually insert the safety pin from the side to ensure that the movable hook is locked to prevent the working device from falling off due to operational errors or failure of the hydraulic system during the operation.

[0005] Manual latches can easily lead to accidents if the operator forgets to use them. Furthermore, safety pins can be easily lost if left unused for extended periods of time. Quick couplers require manual operation, which is time-consuming. Furthermore, damage to the locking system can lead to accidents. Summary of the Invention

[0006] To address the shortcomings of the existing technology, the present invention provides a quick connector with a safety lock, which allows the operator to change tools while inside the excavator through the quick connector, and automatically locks and unlocks the tools. The quick connector also has two independent locking systems, effectively ensuring the safety of the excavator.

[0007] The present invention is achieved according to the following technical solutions:

[0008] In a first aspect, the present invention provides a quick connector with a safety lock, comprising:

[0009] The housing has a reaming hole I for hinged connection with the connecting rod and a reaming hole II for hinged connection with the bucket arm on its upper part;

[0010] A first locking component is mounted on the lower portion of the housing and is capable of performing axial linear reciprocating motion in the housing to lock and unlock the rear pin of the tool;

[0011] A second locking component is mounted on the lower portion of the housing and is capable of rotating in the housing about a hinge point to lock and unlock the front pin of the implement;

[0012] A power component with a linear telescopic function is arranged at the lower part of the shell, and includes a telescopic part and a fixed part. The telescopic part is hinged to the first locking part, and the fixed part is hinged to the second locking part. When the power component is in an extended state, the first locking part and the second locking part are in a locked state at the same time. When the power component is in a first retracted state, the first locking part is in an unlocked state, and when the power component is in a second retracted state, the second locking part is in an unlocked state.

[0013] In some embodiments, the first locking component comprises:

[0014] Two locking pins are symmetrically and parallelly arranged on the left and right sides of the lower portion of the housing, and the locking pins are capable of axial linear sliding within the front plate and the middle plate located in the lower portion of the housing. When the front end of the locking pin extends from the lower portion of the housing, it forms a first movable hook with a C-shaped cross-section with the rear side of the housing.

[0015] The connecting plate is located between the front plate and the middle plate, is fixedly connected to the two locking pins, and has an H-shaped structure as a whole. The telescopic part of the power component is hinged to the connecting plate, and the power component drives the two locking pins to perform axial linear reciprocating motion simultaneously through the connecting plate.

[0016] In some embodiments, the locking pin is a stepped shaft, the large end of which is passed through the inner hole of the front plate, and the small end is passed through the inner hole of the middle plate, and the step is located between the front plate and the middle plate. When the locking pin slides forward between the front plate and the middle plate, causing the step to touch the middle plate, the power component completes the first retraction action.

[0017] In some embodiments, a first elastic component is provided between the connecting plate and the intermediate plate. On the one hand, when the power component fails, the first elastic component can continuously push the connecting plate backward, thereby keeping the two locking pins in a locked state at all times; on the other hand, the retracted locking pins can be reset.

[0018] In some embodiments, the first elastic component is a spring, which is mounted on a locking pin located between the connecting plate and the middle plate.

[0019] In some embodiments, a second elastic component is arranged between the front plate and the power component, and the elastic force of the first elastic component is smaller than that of the second elastic component, so that the second elastic component is not deformed during the forward movement of the two locking pin shafts to compress the first elastic component, so that the fixed part of the power component does not move backward, and thus the second retraction movement is not performed, and on the other hand, the fixed part moving backward is reset when the power component is in the second retracted state.

[0020] In some embodiments, a sleeve extending towards the front plate is arranged on the fixed part of the power component, a guide rod is arranged in the sleeve and cooperates with the gap, and the free end of the guide rod is fixedly connected with the front plate; the second elastic component is a spring which is sleeved on the guide rod between the front plate and the sleeve.

[0021] In some embodiments, the second locking component comprises:

[0022] The sliding pin shafts are arranged in the sliding grooves on the rear plates on the left and right sides of the lower part of the shell respectively, the middle part of the sliding pin shafts is hingedly connected with the fixed part of the power component, and the sliding pin shafts are driven to slide in the sliding grooves by the translational fixed part;

[0023] The locking blocks are in the form of hooks, the tail parts of the locking blocks are arranged in the gaps between the fixed part and the rear plates on the left and right sides respectively, and are hingedly connected with the sliding pin shafts, and the front parts of the locking blocks and the C-shaped blocks located below the front end of the lower part of the shell form the second movable hook claws;

[0024] The thrust structure is fixed on the C-shaped blocks and acts on the locking blocks, and the translational fixed part cooperates with the thrust structure to realize the opening and closing functions of the second movable hook claws.

[0025] In some embodiments, the thrust structure is realized by the following way:

[0026] The two thrust blocks are symmetrically fixed on the C-shaped blocks on the left and right sides of the fixed part, the top surfaces of the thrust blocks are provided with recesses in the form of inverted trapezoids, the tail parts of the locking blocks are provided with protrusions in the form of inverted trapezoids, the protrusions are inserted into the recesses, and the concave-convex cooperation of the two constitutes a gear and rack structure.

[0027] In some embodiments, the power component is in the form of any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder; when the fixed part of the power component is stationary and the telescopic part moves forward, the first telescopic movement of the power component is formed; when the telescopic part of the power component is stationary and the fixed part moves backward, the second telescopic movement of the power component is formed.

[0028] In a second aspect, the application provides a connection method based on the quick connector with safety lock.

[0029] The locking state: when the power component is in the extended state, the first locking component clamps the rear pin shaft of the implement to lock, and the second locking component clamps the front pin shaft of the implement to lock, so as to combine the quick connector with the implement; when the power component fails, causing the rear pin shaft of the implement to be separated from the quick connector, the second locking component can hook the front pin shaft of the implement to prevent the front pin shaft of the implement from being separated from the quick connector.

[0030] The first unlocking state: when the power component is fixed in the fixed part and the telescopic part moves forward to form the first telescopic state of the power component, the first locking component is separated from the rear pin shaft of the implement.

[0031] The second unlocking state: when the power component is fixed in the telescopic part and the fixed part moves backward to form the second telescopic state of the power component, the second locking component is separated from the front pin shaft of the implement, so as to separate the quick connector from the implement.

[0032] In a third aspect, the application provides a working device, which comprises a boom, a stick, an implement, a connecting rod and a plurality of oil cylinders, and the quick connector with safety lock is assembled between the stick and the connecting rod, and the implement is assembled on the quick connector.

[0033] In a fourth aspect, the application provides a construction machine, which comprises a power device, a traveling device, a slewing device, a hydraulic system, an electrical system and the working device.

[0034] The application has the following beneficial effects:

[0035] (1) The quick connector provided by the application ensures that the quick connector is not separated from the implement when the oil cylinder fails.

[0036] (2) The quick connector provided by the application can be unlocked by the operator at any position, and the operation is simpler than the gravity unlocking quick change operation.

[0037] (3) The quick connector provided by the application adopts the independent scheme of front locking and rear locking, the two locks have an unlocking sequence, and are irrelevant.

[0038] (4) The driver can directly complete the combination or separation of the quick connector and the implement in the vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0039] The accompanying drawings, as part of this disclosure, are intended to provide a further understanding of the disclosure. The exemplary embodiments of the disclosure and their descriptions are intended to explain the disclosure and do not constitute undue limitations thereon. Obviously, the drawings described below are merely examples, and those skilled in the art can derive other drawings based on these drawings without inventive effort.

[0040] In the attached figure:

[0041] Figure 1 The quick connector with safety lock of the present invention is an integral three-dimensional Figure 1 ;

[0042] Figure 2 The quick connector with safety lock of the present invention is an integral three-dimensional Figure 2 ;

[0043] Figure 3 1 is a plan view of a quick connector with a safety lock according to the present invention (a is a top view, b is a bottom view);

[0044] Figure 4 is a cross-sectional view of the housing of the present invention;

[0045] Figure 5 A plan view showing the connection between the power component, the first locking component, and the second locking component of the present invention (a is a top view, b is a bottom view);

[0046] Figure 6 The connecting body of the power component, the first locking component and the second locking component of the present invention is Figure 1 (a is the first perspective, b is the second perspective);

[0047] Figure 7 The connecting body of the power component, the first locking component and the second locking component of the present invention is Figure 2 (a is the first perspective, b is the second perspective);

[0048] Figure 8 Schematic diagram of the quick connector with a safety lock of the present invention in a locked state (a is a view in the direction of A, b is a cross-sectional view);

[0049] Figure 9 Schematic diagram of the quick connector with a safety lock of the present invention in a first unlocked state (a is a view in the direction of A, b is a cross-sectional view);

[0050] Figure 10 Schematic diagram of the quick connector with a safety lock of the present invention in a second unlocked state (a is a view in the direction of A, b is a cross-sectional view);

[0051] Figure 11Schematic diagram of the second locking component of the present invention (a is a locking diagram, b is an unlocking diagram).

[0052] Figure symbols: 1-housing, 2-tool rear pin, 3-locking pin, 4-spring, 5-power component, 6-groove, 7-sliding pin, 8-tool front pin, 9-locking block, 10-connecting plate, 11-spring, 12-guide rod, 13-protrusion, 14-thrust block;

[0053] 1.1-inner hole, 1.2-inner hole, 1.3-sliding groove, 1.4-C-shaped block, 1.5-front plate, 1.6-middle plate, 1.7-rear plate; 101-upper part of the shell, 102-lower part of the shell;

[0054] 5.1- telescopic part, 5.2- fixed part, 5.3- sleeve;

[0055] 9.1-Fork structure.

[0056] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but rather to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0058] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0059] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0060] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 8 、 Figure 9 、 Figure 10 As shown, a quick connector with a safety lock comprises a housing 1, a first locking component, a second locking component and a power component 5 with a linear telescopic function; the upper portion 101 of the housing is provided with a reaming hole I for hinged connection with a connecting rod and a reaming hole II for hinged connection with a boom; the first locking component is mounted on the lower portion 102 of the housing and can perform axial linear reciprocating motion in the housing 1 to lock and unlock the rear pin 2 of the implement; the second locking component is mounted on the lower portion 102 of the housing and can perform rotational motion around a hinge point in the housing 1 to lock and unlock the front pin 8 of the implement; the power component 5 is arranged in the lower portion 102 of the housing and comprises a telescopic portion 5.1 and a fixed portion 5.2, the telescopic portion 5.1 being hinged to the first locking component and the fixed portion 5.2 being hinged to the second locking component; when the power component 5 is in an extended state, the first locking component and the second locking component are simultaneously in a locked state; when the power component 5 is in a first retracted state, the first locking component is in an unlocked state, and when the power component 5 is in a second retracted state, the second locking component is in an unlocked state.

[0061] The first locking component is further described below.

[0062] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the first locking component includes two locking pins 3 and a connecting plate 10; the two locking pins 3 are symmetrically and parallel to each other on the left and right sides of the lower part 102 of the shell, and the locking pins 3 can slide axially linearly in the front plate 1.5 and the middle plate 1.6 located in the lower part 102 of the shell; when the front end of the locking pin 3 extends from the lower part 102 of the shell, it forms a first movable hook with a C-shaped cross-section with the rear side of the shell 1; the connecting plate 10 is located between the front plate 1.5 and the middle plate 1.6, and is fixedly connected to the two locking pins 3, and the whole has an H-shaped structure. The telescopic part 5.1 of the power component 5 is hinged to the connecting plate 10, and the power component 5 drives the two locking pins 3 to perform axial linear reciprocating motion at the same time through the connecting plate 10.

[0063] Further solutions, such as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the locking pin shaft 3 is a stepped shaft, the large end of which is passed through the inner hole 1.1 of the front plate 1.5, and the small end is passed through the inner hole 1.2 of the middle plate 1.6. The step is located between the front plate 1.5 and the middle plate 1.6. When the locking pin shaft 3 slides forward between the front plate 1.5 and the middle plate 1.6, causing the step to touch the middle plate 1.6, the power component 5 completes the first retraction action.

[0064] Further solutions, such as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, a first elastic component is provided between the connecting plate 10 and the middle plate 1.6. On the one hand, when the power component 5 fails, the first elastic component can continuously push the connecting plate 10 backward, thereby keeping the two locking pins 3 in a locked state. On the other hand, the retracted locking pins 3 are reset.

[0065] The preferred solution is Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the first elastic component is a spring 4, which is mounted on the locking pin 3 between the connecting plate 10 and the intermediate plate 1.6.

[0066] Further solutions, such as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, a second elastic component is provided between the front plate 1.5 and the power component 5. The elastic force of the first elastic component is smaller than the elastic force of the second elastic component. On the one hand, when the two locking pins 3 move forward and compress the first elastic component, the second elastic component does not deform, so that the fixing portion 5.2 of the power component 5 does not move backward, and thus does not perform the second retraction movement. On the other hand, when the power component 5 is in the second retracted state, the fixing portion 5.2 that moves backward is reset.

[0067] Further solutions, such as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, a sleeve 5.3 extending toward the front plate 1.5 is provided on the fixed portion 5.2 of the power component 5, and a guide rod 12 is provided in the sleeve 5.3 with a clearance fit therewith, and the free end of the guide rod 12 is fixedly connected to the front plate 1.5; the second elastic component is a spring 11, which is sleeved on the guide rod 12 located between the front plate 1.5 and the sleeve 5.3.

[0068] The second locking component is further described below.

[0069] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7As shown, the second locking component includes a sliding pin 7, a locking block 9 and a thrust structure; the two ends of the sliding pin 7 are respectively arranged in the sliding grooves 1.3 on the left and right rear plates 1.7 in the lower part 102 of the shell, and the middle part of the sliding pin 7 is hinged to the fixed part 5.2 of the power component 5, and the sliding pin 7 is driven to slide in the sliding groove 1.3 by the translation of the fixed part 5.2; the locking block 9 is a hook-shaped structure as a whole, and the two forked structures 9.1 at its tail are respectively arranged in the gaps between the fixed part 5.2 and the rear plates 1.7 on both sides, and are hinged to the sliding pin 7, and the front part of the locking block 9 and the C-shaped block 1.4 below it located at the front end of the lower part of the shell 1 form a second movable hook claw; the thrust structure is fixed on the C-shaped block 1.4 and acts on the locking block 9. The fixed part 5.2 after translation cooperates with the thrust structure to realize the opening and closing function of the second movable hook claw.

[0070] Further solutions, such as Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the thrust structure is realized in the following manner: two thrust blocks 14 are symmetrically fixed on the C-shaped blocks 1.4 located on both sides of the fixing portion 5.2, and the top surface of the thrust block 14 is provided with a groove 6 with an inverted trapezoidal cross-section; an inverted trapezoidal protrusion 13 is provided on the radial circumference of the tail of the locking block 9, and the protrusion 13 is inserted into the groove 6, and the concave and convex cooperation of the two constitutes a "gear rack structure".

[0071] Specifically, such as Figure 11 As shown, the left side shows the locking block 9 of the front pin 8 of the machine tool in the unlocked state, and the right side shows the locking block 9 of the front pin 8 of the machine tool in the unlocked state. When the sliding pin 7 slides in the sliding groove 1.3, the protrusion 13 contacts the groove 6, causing the locking block 9 to rotate counterclockwise and unlock.

[0072] The above-mentioned power components are further described below.

[0073] like Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 As shown, the power component 5 is in the form of any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder. In this embodiment, a hydraulic cylinder is used, the fixed portion 5.2 is the cylinder barrel, and the telescopic portion 5.1 is the cylinder telescopic rod. When the cylinder barrel is stationary and the cylinder telescopic rod moves forward, the hydraulic cylinder forms a first telescopic movement of the power component. When the cylinder telescopic rod is stationary and the cylinder barrel moves backward, the hydraulic cylinder forms a second telescopic movement of the power component.

[0074] The present invention also provides a connection method based on the above-mentioned quick connector with a safety lock, which specifically includes the following contents:

[0075] Lock status:

[0076] like Figure 8 As shown, the locking pin 3 is connected to the cylinder telescopic rod via a connecting plate 10. When the cylinder telescopic rod extends outward under the action of hydraulic oil pressure, the sliding pin 7 slides rightward in the sliding groove 1.3, and the locking block 9 rotates clockwise to engage with the C-shaped block 1.4 to lock the front implement pin 8. After the locking pin 3 slides leftward within the inner hole 1.1 of the front plate 1.5 and the inner hole 1.2 of the middle plate 1.6, it extends and engages with the housing 1 to lock the rear implement pin 2. When the hydraulic cylinder fails, due to the presence of the C-shaped block 1.4, the rear implement pin 2 can only be disengaged from the quick coupler by tracing a path B around the front implement pin 8. The spring 4 applies a backward force to the locking pin 3, preventing it from disengaging. Because the front portion of the locking block 9 has a hook-shaped structure, when the rear implement pin 2 is separated from the quick coupler, this locking block 9 acts like a hook to prevent the front implement pin 8 from disengaging.

[0077] First unlocked state:

[0078] like Figure 9 As shown: When the hydraulic cylinder contracts, the cylinder telescopic rod will drive the locking pin 3 to move to the right through the connecting plate 10. A spring 4 is mounted on the locking pin 3, and the connecting plate 10 will compress the spring 4 to the right. The spring 4 will press against the outer edge of the inner hole 1.2 of the middle plate 1.6 on the right. When the step on the locking pin 3 contacts the outer edge of the inner hole 1.2 of the middle plate 1.6 (position D in the figure), the first unlocking state ends. During this process, the elastic force of the spring 4 is less than the elastic force of the spring 11, so that the spring 11 does not deform in the process of the locking pin 3 moving to the right to compress the spring 4, so that the cylinder barrel will not move to the left, and the locking block 9 will not be unlocked.

[0079] Second unlocked state:

[0080] like Figure 10 As shown, as the hydraulic cylinder continues to retract, the locking pin 3 at position D (where the step contacts the inner hole) restricts the telescopic rod from continuing to move rightward. However, the hydraulic cylinder has not yet fully retracted, so the cylinder barrel begins to move leftward. Since the rear end of the cylinder barrel is hinged to the sliding pin 7, it moves leftward with the sliding pin 7. The locking block 9 is hinged to the sliding pin 7, and the moved sliding pin 7 drives the locking block 9 to rotate counterclockwise around the hinge point to unlock the lock.

[0081] Specifically, such as Figure 11 As shown, the groove 6 on the thrust block 14 and the protrusion 13 on the locking block 9 are concave-convex matched. Through this match, when the locking block 9 moves leftward along the sliding groove 1.3, the protrusion 13 comes into contact with the groove 6, thereby prompting the locking block 9 to rotate counterclockwise and then unlock.

[0082] In summary, the quick connector provided by the application ensures that the quick connector is not separated from the implement when the oil cylinder fails, the quick connector provided by the application can be unlocked by the operator at any position, and is simpler than the gravity unlocking quick change operation, the quick connector provided by the application adopts the independent scheme of front locking and rear locking, the two locks have an unlocking sequence and are irrelevant, and the driver can directly complete the combination or separation of the quick connector and the implement in the vehicle.

[0083] The working device provided by the application is described below, and the working device described below can be correspondingly referred to the quick connector with a safety lock described above.

[0084] The working device provided by the application comprises a boom, a stick, an implement, a connecting rod and a plurality of oil cylinders, the quick connector with a safety lock described above is assembled between the stick and the connecting rod, and the implement is assembled on the quick connector.

[0085] The working device provided by the application achieves the beneficial effects consistent with the working device provided by the application, and thus will not be described here.

[0086] The engineering machinery provided by the application is described below, and the engineering machinery described below can be correspondingly referred to the working device described above.

[0087] The engineering machinery provided by the application comprises a power device, a traveling device, a slewing device, a hydraulic system, an electrical system and the working device described above.

[0088] The engineering machinery provided by the application achieves the beneficial effects consistent with the working device provided by the application, and thus will not be described here.

[0089] It should be noted that the engineering machinery described above can be a crawler crane, a crawler excavator, a crawler pump truck or other crawler engineering machinery. The following takes the excavator as an example, and the specific scheme is as follows:

[0090] An excavator comprises a power device, a traveling device, a slewing device and the working device described above.

[0091] The power device of the excavator generally adopts a diesel engine and is fixed on a rotating platform through a damping device to provide power for the traveling device, the slewing device and the working device of the excavator.

[0092] The traveling device of the excavator supports the whole machine mass of the excavator and completes the traveling task, and is mostly in the form of a crawler or a tire.

[0093] The slewing device of the excavator makes the upper part of the vehicle rotate to the left or the right to perform excavation and material removal.

[0094] The working device of the excavator is used to directly complete the excavation task, including the boom, dipper arm, bucket and connecting rod mechanism.

[0095] The hydraulic system of the excavator transmits the power output by the engine to the working device and the traveling device.

[0096] The electrical system of the excavator mainly detects some temperatures, pressures, speeds, and switching quantities of the engine, hydraulic pump, main valve, and actuators (hydraulic cylinders, hydraulic motors), and transmits the relevant detection data to the excavator's dedicated controller. The controller integrates various measurement values, set values, and operation signals to send relevant control information to control the engine, hydraulic pump, main valve, and the entire machine.

[0097] In the description provided herein, numerous specific details are described. However, it is understood that embodiments of the present invention may be practiced without these specific details. In some instances, well-known methods, structures, and techniques are not shown in detail so as not to obscure the understanding of this description.

[0098] Furthermore, those skilled in the art will appreciate that, although some embodiments described herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are also intended to fall within the scope of protection of the present invention and form different embodiments. For example, in the above embodiments, those skilled in the art will be able to use them in combination based on the known technical solutions and the technical problems to be solved by this application.

[0099] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with this patent can make slight changes or modifications to equivalent embodiments using the above-mentioned technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the solution of the present invention.

Claims

1. A quick connector with a safety lock, characterized in that: include: The housing has a reaming hole I for hinged connection with the connecting rod and a reaming hole II for hinged connection with the bucket arm on its upper part; A first locking component is mounted on the lower portion of the housing and is capable of performing axial linear reciprocating motion in the housing to lock and unlock the rear pin of the tool; A second locking component is mounted on the lower portion of the housing and is capable of rotating in the housing about a hinge point to lock and unlock the front pin of the implement; A power component with a linear telescopic function is arranged at the lower part of the housing and includes a telescopic portion and a fixed portion, the telescopic portion is hinged to the first locking portion, and the fixed portion is hinged to the second locking portion; when the power component is in an extended state, the first locking portion and the second locking portion are simultaneously in a locked state; When the power component is in the first retracted state, the first locking component is in the unlocked state, and when the power component is in the second retracted state, the second locking component is in the unlocked state; The first locking component comprises: Two locking pins are symmetrically and parallelly arranged on the left and right sides of the lower portion of the housing, and the locking pins are capable of axial linear sliding within the front plate and the middle plate located in the lower portion of the housing. When the front end of the locking pin extends from the lower portion of the housing, it forms a first movable hook with a C-shaped cross-section with the rear side of the housing. The connecting plate is located between the front plate and the middle plate, is fixedly connected to the two locking pins, and has an overall H-shaped structure. The telescopic portion of the power component is hinged to the connecting plate, and the power component drives the two locking pins to simultaneously perform axial linear reciprocating motion through the connecting plate; A first elastic component is provided between the connecting plate and the intermediate plate. When the power component fails, the first elastic component can continuously push the connecting plate backward, thereby keeping the two locking pins in a locked state, and can also reset the retracted locking pins. The first elastic component is a spring, which is sleeved on the locking pin located between the connecting plate and the middle plate; A second elastic component is provided between the front plate and the power component. The elastic force of the first elastic component is smaller than the elastic force of the second elastic component. On the one hand, when the two locking pins move forward and compress the first elastic component, the second elastic component does not deform, so that the fixed portion of the power component does not move backward and thus does not perform the second retraction movement. On the other hand, when the power component is in the second retracted state, the fixed portion that has moved backward is reset. The fixed portion of the power component is provided with a sleeve extending toward the front plate, the sleeve is provided with a guide rod with a clearance fit therewith, and the free end of the guide rod is fixedly connected to the front plate; The second elastic component is a spring, which is sleeved on the guide rod located between the front plate and the sleeve; The second locking component comprises: A sliding pin, with both ends respectively disposed in sliding grooves on the left and right rear panels of the lower portion of the housing, and a middle portion of the sliding pin hingedly connected to a fixed portion of the power component, such that the sliding pin is driven to slide in the sliding groove by the translational movement of the fixed portion; The locking block is a hook-shaped structure as a whole, with two bifurcated structures at the tail end respectively arranged in the gap between the fixed portion and the two side rear plates, and hingedly connected to the sliding pin shaft. The front portion of the locking block and the C-shaped block below it located at the front end of the lower portion of the housing form a second movable claw; The thrust structure is fixed on the C-shaped block and acts on the locking block. The fixed portion after translation cooperates with the thrust structure to realize the opening and closing functions of the second movable hook claw.

2. The quick connector with a safety lock according to claim 1, characterized in that: The locking pin shaft is a stepped shaft, the large end of which is passed through the inner hole of the front plate, and the small end is passed through the inner hole of the middle plate. The step is located between the front plate and the middle plate. When the locking pin shaft slides forward between the front plate and the middle plate, causing the step to touch the middle plate, the power component completes the first retraction action.

3. The quick connector with a safety lock according to claim 1, characterized in that: The thrust structure is realized by the following methods: Two thrust blocks are symmetrically fixed on the C-shaped blocks located on both sides of the fixed part. The top surface of the thrust block is provided with a groove with an inverted trapezoidal cross-section; an inverted trapezoidal protrusion is provided on the radial circumference of the tail of the locking block, and the protrusion is inserted into the groove. The concave and convex cooperation of the two constitutes a gear rack structure.

4. The quick connector with a safety lock according to claim 1, characterized in that: The power component is in the form of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder; When the fixed portion of the power component is stationary and the telescopic portion moves forward, the power component forms a first telescopic movement; When the telescopic portion of the power component is stationary and the fixed portion moves backward, the second telescopic movement of the power component is formed.

5. A connection method of a quick connector with a safety lock according to any one of claims 1 to 4, characterized in that: Locked state: When the power component is in the extended state, the first locking component clamps the rear pin of the machine to lock it, and the second locking component clamps the front pin of the machine to lock it, thereby combining the quick connector with the machine; when the power component fails, causing the rear pin of the machine to separate from the quick connector, the second locking component can hook the front pin of the machine to prevent the front pin of the machine from separating from the quick connector; First unlocked state: when the fixed portion of the power component is stationary and the telescopic portion moves forward to form the first telescopic state of the power component, the first locking component is separated from the rear pin of the machine; Second unlocked state: when the telescopic part of the power component is stationary and the fixed part moves backward to form the second telescopic state of the power component, the second locking part is separated from the front pin shaft of the machine, thereby separating the quick connector from the machine.

6. A working device comprising a boom, an arm, an implement, a connecting rod and a plurality of cylinders, characterized in that: A quick connector with a safety lock according to any one of claims 1 to 4 is mounted between the boom and the connecting rod, and the implement is mounted on the quick connector.

7. An engineering machine comprising a power unit, a traveling device, a slewing device, a hydraulic system, and an electrical system, characterized in that: Also includes the working device according to claim 6.

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