Double-lock quick connector

Abstract

The double-lock quick connector comprises a base support, a main lock mechanism and an auxiliary lock mechanism, and the main lock mechanism comprises a main lock, a main lock shaft, a connecting plate, a lock plate, a baffle, a linkage tension spring and a main lock tension spring; one end of the main lock is hinged with the main lock shaft, and the other end close to the main lock is connected with the hydraulic driving mechanism; one end of the connecting plate is hinged with the lock plate, and the other end close to the connecting plate is connected with one end of a main lock tension spring through a linkage tension spring arranged on the connecting plate; one end of the baffle is installed on the base support through a baffle shaft and pulled by the other end of the main lock tension spring. The auxiliary lock mechanism comprises a limiting shaft limiting the rotation range of the lock plate, an auxiliary lock tension spring and an auxiliary lock with one end hinged to the auxiliary lock shaft, and the other end of the auxiliary lock is connected with the auxiliary lock tension spring installed on the base support. The auxiliary lock shaft and the limiting shaft are installed on the base support. The double-lock quick connector is composed of two independent locking mechanisms, and the use safety of the excavator is effectively guaranteed.

Description

Technical Field

[0001] The present application relates to a double-lock quick connector, belonging to the technical field of construction machinery. Background Art

[0002] As the most commonly used construction machinery in daily construction, excavators undertake various operation functions. The application of multi-functional attachments is also becoming more and more extensive. The quick connector is used to realize the quick switching and installation of various operating devices, saving the waste of time and manpower caused by replacing attachments and improving work efficiency. The double lock of the quick connector is an independent mechanical device acting on the front and rear pin shafts of the attachment device. This device can still ensure that the attachment device remains in its normal working position in case of loss of meshing force, such as hydraulic system failure or accidental shutdown.

[0003] The structural forms of quick connectors are diverse, mainly divided into mechanical and hydraulic types. When replacing the attachment device with a mechanical quick connector, the installation or disassembly of components such as safety pins still needs to be manually completed, resulting in low efficiency and only protecting one pin shaft of the attachment device, presenting potential safety hazards; when using a hydraulic quick connector, the pressure provided by the hydraulic system drives the meshing system to move to complete the replacement of the attachment device. In case of accidental situations such as hydraulic system failure or misoperation, there is a risk of the attachment device falling. Summary of the Invention

[0004] The purpose of the present application is to overcome the deficiencies in the prior art and provide a double-lock quick connector with better controllability, improving work efficiency and use safety.

[0005] To achieve the above purpose, the technical solution adopted in the present application is: Provide a double-lock quick connector, including: A base bracket, which is movably connected to the construction machinery at the bottom and is provided with installation holes for installing a main lock shaft and a secondary lock shaft on both sides; A main lock mechanism, including a main lock, a main lock shaft, a connecting plate, a lock plate, a baffle plate, a linkage tension spring and a main lock tension spring; one end of the main lock is hinged to the main lock shaft, and the other end close to 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 close to the connecting plate is connected to one end of the main lock tension spring through a linkage tension spring arranged on the connecting plate; one end of the baffle plate is installed on the base bracket through a baffle shaft and is pulled by the other end of the main lock tension spring; A secondary lock mechanism, including a limit shaft for restricting the rotation range of the lock plate, a secondary lock tension spring and a secondary lock with one end hinged to the secondary lock shaft, and the other end of the secondary lock is connected to the secondary lock tension spring installed on the base bracket; the secondary lock shaft and the limit shaft are installed on the base bracket.

[0006] Further, a slot parallel to the rotation axis of the main lock is provided on the main lock, and a limit position matching the other end of the baffle plate is provided.

[0007] Further, the hydraulic drive mechanism includes a hydraulic cylinder and a trigger plate; The main lock is connected to the hydraulic cylinder through a cylinder connecting shaft; The trigger plate cooperates with a slot on the main lock through the cylinder connecting shaft and is used to trigger the baffle to disengage from the limiting position when the hydraulic cylinder contracts.

[0008] Further, a positioning shaft connected to the trigger plate is provided on the main lock to limit the rotation range of the trigger plate.

[0009] Further, a long slot is designed on the connecting plate. The main lock mechanism includes a connecting shaft embedded in the long slot, and the linkage tension spring and the main lock tension spring are jointly connected to the connecting shaft.

[0010] Further, the hydraulic drive mechanism includes a cylinder main shaft fixed to the base bracket. The lock plate rotates around the cylinder main shaft and is hinged to the connecting plate. The cylinder main shaft transversely penetrates the base bracket and is located between the main lock shaft and the sub-lock shaft.

[0011] Further, the base bracket is of a U-shaped structure, and mounting holes for installing the main lock shaft and mounting holes for installing the sub-lock shaft are symmetrically arranged on two plate surfaces of the U-shaped structure.

[0012] Further, the main lock is an arc-shaped clamping plate and is in fixed-distance cooperation with the clamping opening of the connecting body.

[0013] Further, the sub-lock is of an arc-shaped or hook-shaped contour structure, and the contact surface with the attachment pin is arc-shaped.

[0014] Further, the hydraulic drive mechanism is arranged on the front side and / or the rear side of the main lock mechanism and the sub-lock mechanism.

[0015] Compared with the prior art, the beneficial effects achieved by this application are as follows: (1) This application uses mechanical limits to design the main lock and the sub-lock. When the oil cylinder fails, the main lock can lock the pin connected to the attachment, ensuring that the connector and the attachment do not separate; (2) The pulling forces of the linkage tension spring, the main lock tension spring, and the sub-lock tension spring are used as the reset force to drive the double locks to reach the locking position in the normal state. There are not high requirements for the acting force and stroke of the tension spring, and it is not easily worn. When the hydraulic cylinder is working normally, the double-lock quick connector can be unlocked by the hydraulic cylinder at any position, improving the safety and convenience of using the connector; (3) The last stroke of the hydraulic cylinder is used to unlock the sub-lock, which will not cause the linkage between the sub-lock and the main lock and lead to the simultaneous failure of the sub-lock and the main lock, improving the safety of the machine. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a quick connector in the prior art; Figure 2 is a schematic diagram of the double-lock quick connector provided by an embodiment of the present application in a locked state; Figure 3 is a sectional view of the double-lock quick connector provided by an embodiment of the present application in a locked state; Figure 4 is a schematic diagram of pushing the attachment pin into the secondary lock in the initial state provided by an embodiment of the present application; Figure 5 is a schematic diagram of the secondary lock in a pulled-back state provided by an embodiment of the present application; Figure 6 is a schematic diagram of locking the secondary lock provided by an embodiment of the present application; Figure 7 is a schematic diagram of the secondary lock being fully locked provided by an embodiment of the present application; Figure 8 is a schematic diagram of locking the primary lock provided by an embodiment of the present application; Figure 9 is an indication diagram of the primary lock limiting position provided by an embodiment of the present application; Figure 10 is a schematic diagram of the baffle disengaging from the limiting position provided by an embodiment of the present application; Figure 11 is a schematic diagram of the primary lock being initially opened provided by an embodiment of the present application; Figure 12 is a schematic diagram of unlocking the mechanical lock of the primary lock provided by an embodiment of the present application; Figure 13 is a schematic diagram of the primary lock being fully opened provided by an embodiment of the present application; Figure 14 is a schematic diagram of unlocking the mechanical lock of the secondary lock provided by an embodiment of the present application; Figure 15 is a schematic diagram of the primary lock and the secondary lock being fully unlocked provided by an embodiment of the present application; Figure 16 is a schematic diagram of another double-lock quick connector in an open state of the primary lock provided by an embodiment of the present application; In the figure: 1.1, the first tooling pin shaft; 1.2, the second tooling pin shaft; 1.3, the secondary lock connecting pin shaft; 1.4, the pushing oil cylinder; 1.5, the main lock connecting pin shaft; 2.1, the secondary lock shaft; 2.2, the limit shaft; 2.3, the oil cylinder main shaft; 2.4, the connecting shaft, 2.5, the baffle shaft, 2.6, the main lock shaft, 2.11, the secondary lock, 2.12, the lock plate, 2.13, the connecting plate, 2.14, the connecting bolt, 2.15, the linkage tension spring, 2.16, the main lock tension spring, 2.17, the baffle, 2.18, the main lock, 2.19, the oil cylinder connecting shaft, 2.20, the trigger plate, 2.21, the positioning shaft, 2.22, the hydraulic oil cylinder, 2.23, the secondary lock tension spring, 2.24, the secondary lock bolt. Detailed implementation manners

[0017] 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 solutions of the present application and cannot be used to limit the protection scope of the present application.

[0018] Embodiment 1:

[0019] As Figure 1 shown, it is a schematic diagram of a common quick connector in the prior art, which is provided with a fixed hook claw and a movable hook claw. The secondary lock connecting pin shaft 1.3 is hooked by the fixed hook claw; the pushing oil cylinder 1.4 is driven to control the movable hook claw to hook the main lock connecting pin shaft 1.5, so as to realize the grasping and connection of the working device.

[0020] Figure 1 In [reference numeral not clear in the original, assumed to be the same figure], the first tooling pin shaft 1.1 and the second tooling pin shaft 1.2 connect the quick connector with the working device. The secondary lock connecting pin shaft 1.3 and the main lock connecting pin shaft 1.5 need to be manually inserted with pins for mechanical locking. The pin needs to be inserted after completing the action as a safety measure. Manual pin insertion is prone to accidents due to the operator's forgetting, and it is easy to lose the safety pin during the long idle time. At the same time, since there is no additional safety measure for the main lock connecting pin shaft 1.5, once the locking system of the secondary lock connecting pin shaft 1.3 is damaged, accidents are likely to occur.

[0021] Embodiment 2:

[0022] This embodiment provides a double-lock quick connector, specifically a pin-grabbing type double-lock quick connector, including: A base bracket, which is movably connected to the construction machinery at the bottom and is provided with mounting holes for installing the main lock shaft 2.6 and the secondary lock shaft 2.1 on both sides; the base bracket of this embodiment is of a U-shaped structure, and mounting holes for installing the main lock shaft 2.6 and mounting holes for installing the secondary lock shaft 2.1 are symmetrically arranged on the two plate surfaces of the U-shaped structure.

[0023] The main lock 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 tension spring 2.15 and a main lock tension spring 2.16; one end of the main lock 2.18 is hinged to the main lock shaft 2.6, and the other end close to the main lock 2.18 is connected to the hydraulic drive mechanism; one end of the connecting plate 2.13 is hinged to the lock plate 2.12, and the other end close to the connecting plate 2.13 is connected to one end of the main lock tension spring 2.16 through a linkage tension spring 2.15 arranged on the connecting plate 2.13; one end of the baffle 2.17 is installed on the base bracket through the baffle shaft 2.5, and is pulled by the other end of the main lock tension spring 2.16; a slot parallel to the rotation axis of the main lock 2.18 is provided on the main lock 2.18, and the slot is specifically arranged as a long strip hole in this embodiment, and a limit position matching the other end of the baffle 2.17 is provided.

[0024] The secondary lock mechanism includes a limit shaft 2.2 for limiting the rotation range of the lock plate 2.12, a secondary lock tension spring 2.23 and a secondary lock 2.11 with one end hinged to the secondary lock shaft 2.1, and the other end of the secondary lock 2.11 is connected to the secondary lock tension spring 2.23 installed on the base bracket; the secondary lock shaft 2.1 and the limit shaft 2.2 are installed on the base bracket.

[0025] Specifically, in this embodiment, the main lock 2.18 is configured as an arc-shaped clamping plate, which is matched with the clamping opening of the connector at a fixed distance; The secondary lock 2.11 is an arc-shaped or hook-shaped profile structure, and the contact surface with the attachment pin is an arc-shaped.

[0026] Furthermore, the hydraulic drive mechanism includes a hydraulic cylinder 2.22 and a trigger plate 2.20; The main lock 2.18 is connected to the hydraulic cylinder 2.22 through the cylinder connecting shaft 2.19; the trigger plate 2.20 cooperates with the slot on the main lock 2.18 through the cylinder connecting shaft 2.19, and is used to trigger the baffle 2.17 to leave the limit position when the hydraulic cylinder 2.22 contracts.

[0027] 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.

[0028] like Figure 2 , Figure 3 The figures are schematic diagrams and cross-sectional diagrams of the double lock quick connector in the locked state, respectively. 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 through a thread, and the secondary lock tension spring 2.23 is fixed on the secondary lock bolt 2.24 to pull the secondary lock 2.11. The lock plate 2.12 rotates around the oil cylinder main shaft 2.3 until it touches the limit shaft 2.2, which limits the rotation range of the lock plate 2.12.

[0029] Among them, the oil cylinder main shaft 2.3 runs horizontally through the base bracket and is located between the main lock shaft and the secondary lock shaft.

[0030] The connecting plate 2.13 is hinged to the lock plate 2.12. The connecting bolt 2.14 is fixed on the connecting plate 2.13. One end of the linkage tension 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.

[0031] The baffle 2.17 rotates around the baffle shaft 2.5. One end of the main lock tension 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.

[0032] 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 oil cylinder 2.22 and the trigger plate 2.20 are connected in the long hole of the main lock 2.18 through the oil cylinder connecting shaft 2.19.

[0033] Figure 4 This is a schematic diagram of pushing the secondary lock connecting pin 1.3 into the secondary lock in the initial state. At this time, the main lock 2.18 pushes the lock plate 2.12 away from the limit shaft 2.2 through the connecting plate 2.13, no longer restricting the rotation of the secondary lock 2.11. At this time, the secondary lock 2.11 can freely rotate around the secondary lock shaft 2.1. The secondary lock connecting pin 1.3 pushes the secondary lock 2.11 up through contact, and the secondary lock connecting pin 1.3 is pushed into the gap between the secondary lock 2.11 and the base bracket. As Figure 5 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 tension spring 2.23 to complete the engagement of the secondary lock 2.11.

[0034] Figure 6 To lock after the engagement of the secondary lock 2.11 is completed, the main lock connecting pin 1.5 is pushed into the main lock 2.18. At this time, when the hydraulic oil cylinder 2.22 is started, it will push the main lock 2.18 to rotate around the main lock shaft 2.6. At this time, the connecting plate 2.13 and the baffle 2.17 synchronously fit the movement of the main lock 2.18 under the tension of the linkage tension spring 2.15 and the main lock tension spring 2.16 respectively. The lock plate 2.12 rotates around the oil cylinder main shaft 2.3 driven by the connecting plate 2.13 until Figure 7 .

[0035] At Figure 7In it, the lock plate 2.12 is blocked by the limit shaft 2.2, and the lock plate 2.12 and the connecting plate 2.13 no longer move; the baffle plate 2.17 continues to move in contact with the main lock 2.18 under the action of the main lock tension spring 2.16. At this time, the locking of the secondary lock 2.11 is completed. When the secondary lock connecting pin shaft 1.3 engaged by the secondary lock 2.11 needs to move outward, it will drive the secondary lock shaft 2.1 to rotate counterclockwise upward, touch the baffle plate 2.12, and the baffle plate 2.12 is restricted in position by the limit 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.

[0036] Figure 8 It is the state where the hydraulic cylinder 2.22 continues to extend after the secondary lock 2.11 is locked. At this time, the baffle plate 2.17 and the main lock 2.18 continue to rotate, the baffle plate 2.17 enters the limit position, and the main lock 2.18 and the main lock connecting pin shaft 1.5 enter the locking position. At this time, both the main lock 2.18 and the secondary lock 2.11 are in the locked position.

[0037] Figure 9 It is the indication diagram at the main lock limit position. When the hydraulic cylinder loses power and the main lock 2.18 rotates under the action of the main lock shaft 2.6, the baffle plate 2.17 rotates along with the main lock to the locking position under the combined action of the spring and the main lock 2.18. At this time, the baffle plate 2.17 is fixed at this position by the main lock 2.18 and cannot continue to rotate clockwise, and the main lock connecting pin shaft 1.5 is in the state of mechanical locking. The secondary lock 2.11 does not move and is also in the mechanically locked position, and both the main lock 2.18 and the secondary lock 2.11 cannot rotate freely at the same time.

[0038] Figure 10 It is the active unlocking of the hydraulic cylinder 2.22. When the hydraulic cylinder 2.22 retracts, it first drives the trigger plate 2.20 to rotate around the long hole through the cylinder connecting shaft 2.19. At this time, it first contacts the baffle plate 2.17 and drives the baffle plate 2.17 to rotate until it gradually disengages from the limit position until Figure 11 , at this time, the mechanical lock of the main lock 2.18 is unlocked, and the mechanical lock of the secondary lock 2.11 is still locked.

[0039] Figure 12 It is the continuous rotation after unlocking the locked state of the main lock. At this time, the baffle plate 2.17 and the main lock 2.18 rotate together under the drive of the cylinder connecting shaft 2.19 until they contact the connecting plate 2.13, as shown in Figure 13 , at this time, the main lock connecting pin shaft 1.5 can be disengaged from the main lock 2.18, and the mechanical lock of the secondary lock 2.11 is not released, and the secondary lock connecting pin shaft 1.3 is still locked.

[0040] Figure 14 It is to continue to push to the limit position of the hydraulic cylinder 2.22. At this time, the secondary lock 2.11 is unlocked, and the pulling directions of the linkage tension spring 2.15, the main lock tension spring 2.16, and the secondary lock tension spring 2.23 are as shown in the appendix Figure 14As shown by the small arrow in the figure, at this time, the secondary lock connecting pin shaft 1.3 can push open the secondary lock 2.11 under the action of an external force to complete unlocking.

[0041] Figure 15 It is a schematic diagram after unlocking is completed. At this time, the front and rear pin shafts are both unlocked, and the attachment pin shaft withdraws from the connector.

[0042] The double-lock quick connector provided by this application uses mechanical limits to design the main and secondary locks, and uses the spring tension as the reset force to drive the double locks to reach the locked position in the normal state, realizing the primary double-lock locking of the attachment of an excavator or other construction machinery; both the main lock mechanism and the secondary lock mechanism have mechanical locks independent of the hydraulic system. Even if the oil cylinder is damaged, the double-lock quick connector can still lock the attachment; and there is no direct linkage relationship between the secondary lock mechanism and the main lock mechanism. The damage of the main lock 2.18 will not cause the secondary lock 2.11 to open, effectively improving safety and reliability.

[0043] For the locking mechanism on the double-lock quick connector provided by this application, the operator can remotely control and automatically complete it through the control device in the cab, which is convenient to operate and has high work efficiency. The driver can complete the replacement of the attachment through quick change in the excavator, and automatically lock and unlock. At the same time, the quick connector has two independent locking systems, which effectively ensure the safety of the excavator during use.

[0044] Furthermore, the safety performance of a double-lock quick connector provided by this application is related to the lock plate 12 and the baffle 17. Without changing other dimensions of the quick change, the dimensions of the lock plate 12 and the baffle 17 can be increased to increase the strength.

[0045] Furthermore, this application can also change the shape of the hook-shaped contour structure and the position of the main lock limit. The aforementioned double-lock quick connector is placed on one side behind the oil cylinder. The main lock mechanism and the secondary lock mechanism can be placed on the other side of the oil cylinder, as Figure 16 shown, or placed on both sides.

[0046] The sizes, shapes, quantities, and installation positions of the linkage tension spring 2.15, the main lock tension spring 2.16, and the secondary lock tension spring 2.23 are not fixed, and can also be replaced with torsion springs, compression springs, etc. to replace and realize the reset function.

[0047] The above are only the preferred embodiments of this application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of this application, several improvements and deformations can still be made, and these improvements and deformations should also be regarded as the protection scope of this application.

Claims

1. A double lock quick connector, characterized in that: include: A base bracket, the bottom of which is movably connected to the engineering machinery, and two sides of which are provided with mounting holes for mounting a main locking shaft (2.6) and a secondary locking shaft (2.1); A main lock mechanism comprises a main lock (2.18), a main lock shaft (2.6), a connecting plate (2.13), a lock plate (2.12), a baffle plate (2.17), a linkage tension spring (2.15) and a main lock tension spring (2.16); one end of the main lock (2.18) is hinged to the main lock shaft (2.6), and the other end close to the main lock (2.18) is connected to the hydraulic drive mechanism; one end of the connecting plate (2.13) is hinged to the lock plate (2.12), and the other end close to the connecting plate (2.13) is connected to one end of the main lock tension spring (2.16) through a linkage tension spring (2.15) arranged on the connecting plate (2.13); one end of the baffle plate (2.17) is installed on the base bracket through the baffle plate shaft (2.5), and is pulled by the other end of the main lock tension spring (2.16); The secondary lock mechanism comprises a limit shaft (2.2) for limiting the rotation range of a lock plate (2.12), a secondary lock tension spring (2.23), and a secondary lock (2.11) with one end hinged to the secondary lock shaft (2.1); the other end of the secondary lock (2.11) is connected to the secondary lock tension spring (2.23) installed on a base bracket; the secondary lock shaft (2.1) and the limit shaft (2.2) are installed on the base bracket.

2. A double lock quick connector according to claim 1, characterized in that: The main lock (2.18) is provided with a slot parallel to the rotation axis of the main lock (2.18), and is provided with a limit position matching the other end of the baffle (2.17).

3. A double lock quick connector according to claim 2, characterized in that: The hydraulic drive mechanism comprises a hydraulic cylinder (2.22) and a trigger plate (2.20); 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) cooperates with the slot on the main lock (2.18) via the oil cylinder connecting shaft (2.19).

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

5. A double lock quick connector according to claim 1, characterized in that: The connecting plate (2.13) is provided with an elongated hole slot, the main locking mechanism comprises a connecting shaft (2.4) embedded in the elongated hole slot, and the linkage tension spring (2.15) and the main locking tension spring (2.16) are connected to the connecting shaft (2.4).

6. A double lock quick connector according to claim 1, characterized in that: The hydraulic drive mechanism comprises an oil cylinder main shaft (2.3) fixed on the base bracket, the locking plate (2.12) rotates around the oil cylinder main shaft (2.3) and is hinged to the connecting plate (2.13), and the oil cylinder main shaft (2.3) transversely penetrates the base bracket and is located between the main locking shaft (2.6) and the auxiliary locking shaft (2.1).

7. A double lock quick connector according to claim 1, characterized in that: The base bracket is a U-shaped structure, and mounting holes for mounting a main locking shaft (2.6) and mounting holes for mounting a secondary locking shaft (2.1) are symmetrically arranged on two plate surfaces of the U-shaped structure.

8. A double lock quick connector according to claim 1, characterized in that: The main lock (2.18) is an arc-shaped clamping plate, which is matched with the clamping opening of the connector at a fixed distance.

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

10. A double lock quick connector according to claim 1, characterized in that: The hydraulic drive mechanism is arranged at the front side and / or the rear side of the main locking mechanism and the auxiliary locking mechanism.

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