A dual lock quick connector

Abstract

This application discloses a double-lock quick connector, including a base bracket, a main locking mechanism, and a secondary locking mechanism. The main locking mechanism includes a main lock, a main locking shaft, a connecting plate, a locking plate, a baffle, a linkage spring, and a main lock spring. One end of the main lock is hinged to the main locking shaft, and the other end near the main lock is connected to a hydraulic drive mechanism. One end of the connecting plate is hinged to the locking plate, and the other end near the connecting plate is connected to one end of the main lock spring via a linkage spring mounted on the connecting plate. One end of the baffle is mounted on the base bracket via a baffle shaft and is pulled by the other end of the main lock spring. The secondary locking mechanism includes a limiting shaft that restricts the rotation range of the locking plate, a secondary lock spring, and a secondary lock with one end hinged to the secondary locking shaft. The other end of the secondary lock is connected to the secondary lock spring mounted on the base bracket. The secondary lock shaft and the limiting shaft are mounted on the base bracket. This double-lock quick connector has two independent locking mechanisms, effectively ensuring the safety of excavator operation.

Description

Technical Field

[0001] This application relates to a double-locking quick connector, belonging to the field of engineering machinery technology. 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 couplings are used to quickly switch between and install various working devices, saving time and manpower wasted on attachment changes and improving work efficiency. The double lock of the quick-connect coupling is an independent mechanical device acting on the front and rear pins of the attachment. This device ensures that the attachment remains in its normal operating position even in the event of loss of engagement, such as hydraulic system failure or accidental shutdown.

[0003] Quick connectors come in various structural forms, mainly divided into mechanical and hydraulic types. Mechanical quick connectors still require manual installation or removal of components such as safety pins when replacing accessories, resulting in low efficiency and only protecting one pin of the accessory, posing a safety hazard. Hydraulic quick connectors rely on the pressure provided by the hydraulic system to drive the engagement system to replace accessories; however, in the event of hydraulic system failure or misoperation, the accessories may fall off. Summary of the Invention

[0004] The purpose of this application is to overcome the shortcomings of the prior art and provide a double-lock quick connector with better operability, thereby improving work efficiency and safety.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] A double-locking quick connector is provided, comprising:

[0007] The base bracket is movably connected to the engineering machinery at its bottom, and has mounting holes on both sides for installing the main locking shaft and the auxiliary locking shaft;

[0008] The main locking mechanism includes a main lock, a main lock shaft, a connecting plate, a lock plate, a baffle, a linkage spring, and a main lock spring; one end of the main lock is hinged to the main lock shaft, and the other end near the main lock is connected to a hydraulic drive mechanism; one end of the connecting plate is hinged to the lock plate, and the other end near the connecting plate is connected to one end of the main lock spring through a linkage spring set on the connecting plate; one end of the baffle is mounted on the base bracket through a baffle shaft and is pulled by the other end of the main lock spring.

[0009] The secondary locking mechanism includes a limiting shaft that restricts the rotation range of the locking plate, a secondary locking spring, and a secondary lock with one end hinged to the secondary locking shaft. The other end of the secondary lock is connected to the secondary locking spring mounted on the base bracket. The secondary locking shaft and the limiting shaft are mounted on the base bracket.

[0010] Furthermore, the main lock has a slot parallel to the rotation axis of the main lock, and a limiting position that matches the other end of the baffle.

[0011] Furthermore, the hydraulic drive mechanism includes a hydraulic cylinder and a trigger plate;

[0012] The main lock is connected to the hydraulic cylinder via a hydraulic cylinder connecting shaft;

[0013] The trigger plate is connected to the slotted part of the main lock via the hydraulic cylinder connecting shaft, and is used to trigger the baffle to disengage from the limit position when the hydraulic cylinder retracts.

[0014] Furthermore, the main lock is provided with a positioning shaft connected to the trigger plate to limit the rotation range of the trigger plate.

[0015] Furthermore, the connecting plate is designed with an elongated slot, and the main locking mechanism includes a connecting shaft embedded in the elongated slot. The linkage spring and the main locking spring are connected to the connecting shaft.

[0016] Furthermore, the hydraulic drive mechanism includes a cylinder spindle fixed on the base support, the locking plate rotates around the cylinder spindle and is hinged to the connecting plate, and the cylinder spindle extends laterally through the base support and is located between the main locking shaft and the auxiliary locking shaft.

[0017] Furthermore, the base support is a U-shaped structure, and the two plates of the U-shaped structure are symmetrically provided with mounting holes for installing the main locking shaft and mounting holes for installing the auxiliary locking shaft.

[0018] Furthermore, the main lock is an arc-shaped clamping plate that is fitted at a fixed distance with the clamping opening of the connecting body.

[0019] Furthermore, the secondary lock has an arc-shaped or hook-shaped profile structure, and the contact surface with the accessory pin is arc-shaped.

[0020] Furthermore, the hydraulic drive mechanism is located on the front and / or rear side of the main locking mechanism and the auxiliary locking mechanism.

[0021] Compared with the prior art, the beneficial effects achieved by this application are as follows:

[0022] (1) This application uses mechanical limit to design the main lock and the auxiliary lock. When the oil cylinder fails, the main lock can lock the pin connected to the attachment to ensure that the connector and the attachment do not separate.

[0023] (2) The tension of the linkage spring, the main lock spring and the auxiliary lock spring is used as the reset force to drive the double lock to the locked position under normal conditions. The requirements for the force and stroke of the spring are not high and it is not easy to wear out. When the hydraulic cylinder is working normally, the double lock quick connector can be unlocked by the hydraulic cylinder at any position, which improves the safety and convenience of the connector.

[0024] (3) The secondary lock is unlocked by using the last stroke of the hydraulic cylinder, which will not cause the secondary lock and the main lock to fail simultaneously, thus improving the safety of the machine. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a quick connector in the prior art;

[0026] Figure 2 This is a schematic diagram of the locked state of the double-lock quick connector provided in the embodiments of this application;

[0027] Figure 3 This is a cross-sectional view of the double-lock quick connector in the locked state provided in the embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the initial state provided in the embodiments of this application, in which the accessory pin is pushed into the secondary lock;

[0029] Figure 5 This is a schematic diagram of the secondary lock in the pulled-back state provided in the embodiments of this application;

[0030] Figure 6 A schematic diagram illustrating the locking of the secondary lock provided in this embodiment of the application;

[0031] Figure 7 A schematic diagram showing the secondary lock fully locked according to an embodiment of this application;

[0032] Figure 8 A schematic diagram of the master lock locking provided in an embodiment of this application;

[0033] Figure 9 An indicator diagram of the main lock limit position provided in an embodiment of this application;

[0034] Figure 10 A schematic diagram showing the position where the baffle is disengaged from the limiting position according to an embodiment of this application;

[0035] Figure 11 A schematic diagram illustrating the initial opening of the main lock as provided in an embodiment of this application;

[0036] Figure 12 A schematic diagram illustrating the unlocking of the main mechanical lock provided in an embodiment of this application;

[0037] Figure 13 A schematic diagram showing the main lock fully open according to an embodiment of this application;

[0038] Figure 14 A schematic diagram illustrating the unlocking of a mechanical lock provided in an embodiment of this application;

[0039] Figure 15A schematic diagram showing the main lock and secondary lock after unlocking, as provided in an embodiment of this application.

[0040] Figure 16 A schematic diagram of another double-lock quick connector provided in the embodiment of this application in the main lock open state;

[0041] In the diagram: 1.1 First tooling pin; 1.2 Second tooling pin; 1.3 Secondary lock connecting pin; 1.4 Push cylinder; 1.5 Main lock connecting pin; 2.1 Secondary lock shaft; 2.2 Limiting shaft; 2.3 Cylinder main shaft; 2.4 Connecting shaft; 2.5 Baffle shaft; 2.6 Main lock shaft; 2.11 Secondary lock; 2.12 Lock plate; 2.13 Connecting plate; 2.14 Connecting bolt; 2.15 Linkage spring; 2.16 Main lock spring; 2.17 Baffle; 2.18 Main lock; 2.19 Cylinder connecting shaft; 2.20 Trigger plate; 2.21 Positioning shaft; 2.22 Hydraulic cylinder; 2.23 Secondary lock spring; 2.24 Secondary lock bolt. Detailed Implementation

[0042] The present application will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and should not be used to limit the scope of protection of the present application.

[0043] Example 1:

[0044] like Figure 1 The diagram shown is a schematic of a common quick connector in the prior art. It is equipped with a fixed hook and a movable hook. The fixed hook is used to hook the secondary lock connecting pin 1.3. The drive cylinder 1.4 is used to control the movable hook to hook the main lock connecting pin 1.5, so as to realize the gripping and connection of the working device.

[0045] Figure 1 The first tooling pin 1.1 and the second tooling pin 1.2 connect the quick connector to the working device. The auxiliary lock connecting pin 1.3 and the main lock connecting pin 1.5 require manual insertion for mechanical locking. As a safety measure, the pins must be inserted only after the operation is complete. Manual insertion is prone to accidents due to operator forgetfulness, and the safety pins are easily lost due to prolonged idle time. Furthermore, since the main lock connecting pin 1.5 lacks additional safety measures, damage to the locking system of the auxiliary lock connecting pin 1.3 can easily lead to accidents.

[0046] Example 2:

[0047] This embodiment provides a double-locking quick connector, specifically a pin-type double-locking quick connector, comprising:

[0048] The base bracket is movably connected to the engineering machinery at its bottom, and has mounting holes on both sides for installing the main locking shaft 2.6 and the auxiliary locking shaft 2.1. In this embodiment, the base bracket is a U-shaped structure, and mounting holes for installing the main locking shaft 2.6 and the auxiliary locking shaft 2.1 are symmetrically arranged on the two plates of the U-shaped structure.

[0049] The main locking mechanism includes a main lock 2.18, a main lock shaft 2.6, a connecting plate 2.13, a lock plate 2.12, a baffle 2.17, a linkage spring 2.15, and a main lock spring 2.16. One end of the main lock 2.18 is hinged to the main lock shaft 2.6, and the other end near the main lock 2.18 is connected to a hydraulic drive mechanism. One end of the connecting plate 2.13 is hinged to the lock plate 2.12, and the other end near the connecting plate 2.13 is connected to one end of the main lock spring 2.16 via a linkage spring 2.15 mounted on the connecting plate 2.13. One end of the baffle 2.17 is mounted on the base bracket via a baffle shaft 2.5 and is pulled by the other end of the main lock spring 2.16. The main lock 2.18 has a slot parallel to its rotation axis; in this embodiment, the slot is specifically a long hole, and a limiting position matching the other end of the baffle 2.17 is also provided.

[0050] The secondary locking mechanism includes a limiting shaft 2.2 that restricts the rotation range of the locking plate 2.12, a secondary locking spring 2.23, and a secondary lock 2.11 with one end hinged to the secondary locking shaft 2.1. The other end of the secondary lock 2.11 is connected to the secondary locking spring 2.23 mounted on the base bracket. The secondary locking shaft 2.1 and the limiting shaft 2.2 are mounted on the base bracket.

[0051] Specifically, in this embodiment, the main lock 2.18 is set as an arc-shaped clamping plate, which is matched with the clamping opening of the connecting body at a fixed distance;

[0052] The secondary lock 2.11 has an arc-shaped or hook-shaped profile structure, and the contact surface with the accessory pin is arc-shaped.

[0053] Furthermore, the aforementioned hydraulic drive mechanism includes a hydraulic cylinder 2.22 and a trigger plate 2.20;

[0054] The main lock 2.18 is connected to the hydraulic cylinder 2.22 via the cylinder connecting shaft 2.19; the trigger plate 2.20 is engaged with the slot on the main lock 2.18 via the cylinder connecting shaft 2.19, and is used to trigger the baffle 2.17 to disengage from the limit position when the hydraulic cylinder 2.22 retracts.

[0055] Furthermore, the main lock 2.18 is provided with a positioning shaft 2.21 connected to the trigger plate 2.20 to limit the rotation range of the trigger plate 2.20.

[0056] like Figure 2 , Figure 3The figures show a schematic diagram and a cross-sectional view of the double-lock quick connector in the locked state. The secondary lock 2.11 rotates around the secondary lock shaft 2.1. The secondary lock bolt 2.24 is connected to the secondary lock 2.11 via threads. The secondary lock tension spring 2.23 is fixed to the secondary lock bolt 2.24, serving to pull the secondary lock 2.11. The locking plate 2.12 rotates around the cylinder main shaft 2.3 until it contacts the limit shaft 2.2, thus limiting the rotation range of the locking plate 2.12.

[0057] Among them, the hydraulic cylinder main shaft 2.3 extends laterally through the base bracket and is located between the main locking shaft and the auxiliary locking shaft.

[0058] The connecting plate 2.13 and the locking plate 2.12 are hinged together, and the connecting bolt 2.14 is fixed on the connecting plate 2.13. One end of the linkage spring 2.15 is fixed to the connecting shaft 2.4, and the other end is fixed to the connecting bolt 2.14, providing tension between the connecting bolt 2.14 and the connecting plate 2.13.

[0059] The baffle 2.17 rotates around the baffle shaft 2.5. One end of the main locking spring 2.16 is fixed to the connecting shaft 2.4, and the other end is fixed to the baffle 2.17, providing tension between the connecting shaft 2.4 and the baffle 2.17.

[0060] The main lock 2.18 rotates around the main lock shaft 2.6. The trigger plate 2.20 rotates around the positioning shaft 2.21. The hydraulic cylinder 2.22 and the trigger plate 2.20 are connected in the elongated hole of the main lock 2.18 through the hydraulic cylinder connecting shaft 2.19.

[0061] Figure 4 The diagram illustrates the initial state with the secondary lock connecting pin 1.3 pushed into the secondary lock. At this point, the main lock 2.18, via the connecting plate 2.13, pushes the lock plate 2.12 away from the limiting shaft 2.2, no longer restricting the rotation of the secondary lock 2.11. The secondary lock 2.11 can now rotate freely around the secondary lock shaft 2.1. The secondary lock connecting pin 1.3, through contact, pushes the secondary lock 2.11 upwards, and is pushed into the gap between the secondary lock 2.11 and the base bracket. (The diagram is incomplete and requires further context.) Figure 5 As shown, after the secondary lock connecting pin 1.3 is pushed in, the secondary lock 2.11 is pulled back under the tension of the secondary lock spring 2.23, thus completing the engagement of the secondary lock 2.11.

[0062] Figure 6 To lock the secondary lock 2.11 after engagement, push the main lock connecting pin 1.5 into the main lock 2.18. At this time, activate the hydraulic cylinder 2.22, which will push the main lock 2.18 to rotate around the main lock shaft 2.6. Simultaneously, the connecting plate 2.13 and the baffle 2.17, under the tension of the linkage spring 2.15 and the main lock spring 2.16 respectively, synchronously engage with the main lock 2.18. The locking plate 2.12, driven by the connecting plate 2.13, rotates around the cylinder main shaft 2.3 until... Figure 7 .

[0063] exist Figure 7 In the middle, the locking plate 2.12 is blocked by the limiting shaft 2.2, and the locking plate 2.12 and the connecting plate 2.13 no longer move; the baffle 2.17 continues to move against the main lock 2.18 under the action of the main lock tension spring 2.16. At this time, the secondary lock 2.11 is locked. When the secondary lock connecting pin 1.3 engaged with the secondary lock 2.11 wants to move outward, it will drive the secondary lock shaft 2.1 to rotate counterclockwise upward, touching the baffle 2.12. The baffle 2.12 is restricted in position by the limiting shaft 2.2, and the entire secondary lock shaft 2.1 cannot continue to rotate, thus completing the locking of the secondary lock 2.11.

[0064] Figure 8 With the secondary lock 2.11 locked and the hydraulic cylinder 2.22 still extended, the baffle 2.17 and the main lock 2.18 continue to rotate. The baffle 2.17 enters the limit position, and the main lock 2.18 and the main lock connecting pin 1.5 enter the locked position. At this time, both the main lock 2.18 and the secondary lock 2.11 are in the locked position.

[0065] Figure 9 The diagram shows the indicator at the main lock limit position. When the hydraulic cylinder loses power, the main lock 2.18 rotates under the action of the main lock shaft 2.6. The baffle 2.17, under the combined action of the spring and the main lock 2.18, rotates against the main lock to the locked position. At this point, the baffle 2.17 is fixed in this position by the main lock 2.18 and cannot continue to rotate clockwise. The main lock connecting pin 1.5 is in a mechanically locked state. The auxiliary lock 2.11 does not move and is also in a mechanically locked position. Both the main lock 2.18 and the auxiliary lock 2.11 cannot rotate freely.

[0066] Figure 10 This allows for the active unlocking of hydraulic cylinder 2.22. When hydraulic cylinder 2.22 retracts, it first drives trigger plate 2.20 to rotate around the elongated hole via cylinder connecting shaft 2.19. At this point, trigger plate 2.20 first contacts baffle 2.17, causing baffle 2.17 to rotate gradually away from the limit position until... Figure 11 At this point, the mechanical lock of the main lock 2.18 is unlocked, while the mechanical lock of the auxiliary lock 2.11 remains locked.

[0067] Figure 12 To unlock the main lock and continue rotating, the baffle 2.17 and the main lock 2.18 rotate together under the drive of the hydraulic cylinder connecting shaft 2.19 until they contact the connecting plate 2.13. Figure 13 At this point, the main lock connecting pin 1.5 can be disengaged from the main lock 2.18, the mechanical lock of the auxiliary lock 2.11 is not released, and the auxiliary lock connecting pin 1.3 is still locked.

[0068] Figure 14To continue pushing to the limit position of hydraulic cylinder 2.22, at which point the secondary lock 2.11 is released, and the tension directions of the linkage spring 2.15, main lock spring 2.16, and secondary lock spring 2.23 are as shown in the attached figure. Figure 14 As shown by the small arrow, at this time, the secondary lock connecting pin 1.3 can be pushed open by external force to unlock the secondary lock 2.11.

[0069] Figure 15 The diagram shows the unlocked state. At this point, both the front and rear pins have been released, and the attachment pins have been removed from the connector.

[0070] The dual-lock quick connector provided in this application utilizes mechanical limiting to design the main and auxiliary locks. Spring tension is used as the reset force to drive the dual locks to the locked position under normal conditions, achieving primary dual-locking of excavators or other construction machinery attachments. Both the main and auxiliary lock mechanisms have mechanical locking independent of the hydraulic system; even if the cylinder is damaged, the dual-lock quick connector can still lock the attachment. Furthermore, there is no direct linkage between the auxiliary and main lock mechanisms; damage to the main lock 2.18 will not cause the auxiliary lock 2.11 to open, effectively improving safety and reliability.

[0071] The locking mechanism on the double-lock quick-connector provided in this application can be automatically controlled remotely by the operator from inside the cab via a control device, making it convenient to operate and highly efficient. The operator can change attachments and automatically lock and unlock them from inside the excavator via a quick-change mechanism. Simultaneously, the quick-connector has two independent locking systems to effectively ensure the safety of excavator operation.

[0072] Furthermore, the safety performance of the double-lock quick connector provided in this application is related to the locking plate 12 and the baffle 17. The size of the locking plate 12 and the baffle 17 can be increased to increase the strength without changing other dimensions of the quick connector.

[0073] Furthermore, this application can also modify the shape of the hook-shaped profile structure and the position of the main lock limit. The aforementioned double-lock quick connector is located on one side behind the hydraulic cylinder; the main lock mechanism and the auxiliary lock mechanism can be placed on the other side of the hydraulic cylinder, such as... Figure 16 As shown, or placed on both sides.

[0074] The dimensions, shape, quantity, and installation position of the linkage spring 2.15, main lock spring 2.16, and auxiliary lock spring 2.23 are not fixed, and they can also be replaced with torsion springs, compression springs, etc., to achieve the reset function.

[0075] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A double-locking quick connector, characterized in that, include: The base bracket is movably connected to the engineering machinery at its bottom, and has mounting holes on both sides for installing the main locking shaft (2.6) and the auxiliary locking shaft (2.1); The main locking mechanism includes a main lock (2.18), a main lock shaft (2.6), a connecting plate (2.13), a locking plate (2.12), a baffle (2.17), a linkage spring (2.15), and a main lock spring (2.16). One end of the main lock (2.18) is hinged to the main lock shaft (2.6), and the other end near the main lock (2.18) is connected to a hydraulic drive mechanism. The main lock (2.18) has a slot parallel to the rotation axis of the main lock (2.18) and a limiting position matching the other end of the baffle (2.17). The hydraulic drive mechanism includes a hydraulic cylinder (2.22) and a trigger plate (2.20). The trigger plate (2.20) is connected to the cylinder via a connecting shaft (2.13). .19) It engages with the slot on the main lock (2.18); one end of the connecting plate (2.13) is hinged to the lock plate (2.12), and the other end near the connecting plate (2.13) is connected to one end of the main lock spring (2.16) through the linkage spring (2.15) set on the connecting plate (2.13); one end of the baffle (2.17) is mounted on the base bracket through the baffle shaft (2.5) and is pulled by the other end of the main lock spring (2.16). The baffle (2.17) is configured to engage with the limit position on the main lock (2.18) under the pull of the main lock spring (2.16) to lock the main lock, and is triggered to disengage from the limit position to unlock the main lock when the hydraulic drive mechanism is retracted; The secondary locking mechanism includes a limiting shaft (2.2) that limits the rotation range of the locking plate (2.12), a secondary locking spring (2.23), and a secondary lock (2.11) with one end hinged to the secondary locking shaft (2.1). The other end of the secondary lock (2.11) is connected to the secondary locking spring (2.23) mounted on the base bracket. The secondary locking shaft (2.1) and the limiting shaft (2.2) are mounted on the base bracket.

2. The double-locking quick connector according to claim 1, characterized in that, The main lock (2.18) is connected to the hydraulic cylinder (2.22) via the cylinder connecting shaft (2.19).

3. The double-locking quick connector according to claim 2, characterized in that, The main lock (2.18) is provided with a positioning shaft (2.21) that is connected to the trigger plate (2.20).

4. A double-locking quick connector according to claim 1, characterized in that, The connecting plate (2.13) is designed with an elongated slot, and the main locking mechanism includes a connecting shaft (2.4) embedded in the elongated slot. The linkage spring (2.15) and the main locking spring (2.16) are connected to the connecting shaft (2.4).

5. A double-locking quick connector according to claim 1, characterized in that, The hydraulic drive mechanism includes a cylinder spindle (2.3) fixed on a base support. The locking plate (2.12) rotates around the cylinder spindle (2.3) and is hinged to the connecting plate (2.13). The cylinder spindle (2.3) passes through the base support laterally and is located between the main locking shaft (2.6) and the auxiliary locking shaft (2.1).

6. A double-locking quick connector according to claim 1, characterized in that, The base support is a U-shaped structure, and the two plates of the U-shaped structure are symmetrically provided with mounting holes for installing the main locking shaft (2.6) and mounting holes for installing the auxiliary locking shaft (2.1).

7. A double-locking quick connector according to claim 1, characterized in that, The main lock (2.18) is an arc-shaped clamping plate that is fitted at a fixed distance with the clamping opening of the connecting body.

8. A double-locking quick connector according to claim 1, characterized in that, The secondary lock (2.11) has an arc-shaped or hook-shaped profile structure, and the contact surface with the accessory pin is arc-shaped.

9. A double-locking quick connector according to claim 1, characterized in that, The hydraulic drive mechanism is located on the front and / or rear side of the main locking mechanism and the auxiliary locking mechanism.

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