Front-back double-locking shovel shaft type connector for excavator

Abstract

The shovel shaft type connector comprises a locking support and a connecting support located at the top end of the locking support, bucket rod pin shafts are symmetrically arranged on the connecting support, and an oil cylinder is arranged in the locking support. A fixed jaw and a semicircular jaw are respectively formed in two ends of the bottom of the locking bracket; a safety hook is arranged at the fixed jaw, and groove shafts are symmetrically arranged at the semicircular jaw; the oil cylinder is provided with a plurality of piston rods arranged in a front-back staggered mode and controls the groove shaft and the safety hook to move through the piston rods. By means of the front-end locking structure and the rear-end locking structure, the accessory can be assembled and disassembled, a round locking structure capable of locking an accessory shaft is formed through a semicircular jaw, the outer circle of the accessory shaft can be perfectly wrapped, and safety is effectively improved; the accessory shaft can be conveniently locked and mounted, and the sequence of locking / contact locking of the double-end locking structure can be controlled, so that the convenience of mounting and dismounting is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator mechanical components, in particular to a shovel shaft type connector with front and rear double locking for an excavator. Background Art

[0002] Excavators and other operating machinery play an important role in the construction process. When using them, different attachments such as buckets, grabs, breakers or lifting hooks can be used according to work requirements.

[0003] In order to facilitate the connection between excavators and different attachments, excavator attachment connectors came into being, which can easily switch the working scenes of the excavator and improve work efficiency.

[0004] However, the existing connectors are labor-intensive to assemble and disassemble accessories during use, and are often fixed by locking bolts or nuts, which poses a problem of operational convenience. Moreover, the complex design of the connectors is not convenient for quick replacement of accessories. In addition, when the connectors are matched with accessories, the locking parts often cannot wrap the accessory shaft well, which can easily cause the connectors to wear and lead to a decrease in power transmission efficiency, and lack sufficient safety performance. Utility Model Content

[0005] The utility model aims to solve the defects in the prior art and proposes a shovel shaft type connector with front and rear double locking for an excavator.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A shovel-shaft connector with front and rear double locking for an excavator, comprising a locking bracket and a connecting bracket located at the top of the locking bracket, wherein a bucket arm pin is symmetrically provided on the connecting bracket, and an oil cylinder is provided inside the locking bracket;

[0008] The two ends of the bottom of the locking bracket are respectively provided with a fixed jaw and a semicircular jaw;

[0009] The fixed jaws are provided with a safety hook, and the semicircular jaws are symmetrically provided with groove shafts;

[0010] The oil cylinder is provided with a plurality of piston rods arranged in a staggered manner in front and back, and the oil cylinder controls the movement of the groove shaft and the safety hook respectively through the piston rods;

[0011] The safety hook is used to lock and fix the jaws of the tiger through movement;

[0012] The groove shaft is used to lock the semicircular jaws through movement.

[0013] Furthermore, the piston rod includes a first piston rod and a second piston rod, and the second piston rod is used to cooperate with the safety hook;

[0014] The piston rod is used to cooperate with the groove shaft;

[0015] The oil cylinder causes the groove shaft and the safety hook to simultaneously extend and retract through the piston rod 1 and the piston rod 2;

[0016] The safety hook locks the jaws by extending and releases the lock by retracting.

[0017] The groove shaft locks the semicircular jaws by extending the shaft and releases the locking state by retracting the shaft.

[0018] Furthermore, the groove shaft is a cylindrical structure with a slot. When the groove shaft is in a locked state, it forms a circular structure with the semicircular jaws for wrapping / locking the outer circle of the shaft of the connecting accessory.

[0019] Furthermore, a connecting plate cooperating with the groove shaft is provided at the bottom of the locking bracket, and the connecting plate is connected to the piston rod 1. The piston rod 1 enables the symmetrically arranged groove shafts to move synchronously through the connecting plate.

[0020] Furthermore, the locking bracket is provided with a strip guide groove at the contact position between the connecting plate and the side walls thereof. A guide plate is provided in the strip guide groove. The guide plate and the connecting plate are connected via a guide shaft.

[0021] Furthermore, a spring rod is provided inside the groove shaft, and the spring rod is inserted into a sleeve that cooperates with the oil cylinder. The outer wall of the spring rod is provided with a first spring that cooperates with the sleeve, and the first spring is used to keep the groove shaft in an extended state.

[0022] Furthermore, a fixing pin connected to the locking bracket is provided on the top of the safety hook;

[0023] The bottom of the safety hook is connected to the second piston rod through a connecting rod, and the safety hook rotates around the fixing pin as an axis.

[0024] Furthermore, a second spring is provided on the piston rod 2, and the second spring is located at the end of the piston rod 2 away from the safety hook. The second spring is used to keep the piston rod 2 cooperating therewith in an extended state and to control the extension / contraction movement sequence of the piston rod 2 and the piston rod 1.

[0025] Compared with the prior art, the beneficial effects of the present invention are:

[0026] The attachment can be installed and removed through the front and rear double-end locking structure. The semicircular jaws form a circular locking structure that can lock the attachment shaft, which can perfectly wrap the outer circle of the attachment shaft, effectively increasing safety.

[0027] By providing a cylinder with multiple piston rods, the double-end locking structure can lock the attachment shaft together through only one cylinder operation step. At the same time, a spring structure is added to the piston rod to ensure that the double-end locking structure can maintain the extension and locking tendency, which facilitates the locking installation of the attachment shaft. In addition, the order in which the double-end locking structure completes locking / contact locking can be controlled, thereby improving the convenience of installation and removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0029] Figure 1 This is a schematic diagram of the overall structure of the shovel-shaft connector with front and rear double locking for excavators proposed by the present invention;

[0030] Figure 2 This is a schematic diagram of the expanded structure of the shovel-shaft connector with front and rear double locking for excavators proposed by the present invention;

[0031] Figure 3 This is a schematic diagram of the cooperation between the oil cylinder, the groove shaft and the safety hook of the shovel shaft type connector with front and rear double locking for excavators proposed in the utility model;

[0032] Figure 4 This is the second schematic diagram of the cooperation between the oil cylinder, the groove shaft and the safety hook of the front and rear double-locking shovel shaft type connector for excavators proposed by the present invention;

[0033] Figure 5 This is a schematic structural diagram of the oil cylinder of the shovel shaft connector with front and rear double locking for excavators proposed in the utility model;

[0034] Figure 6 This is a schematic diagram of the cooperation between the safety hook and the piston rod 2 of the shovel shaft type connector with front and rear double locking for excavators proposed in the present invention;

[0035] Figure 7 This is the second schematic diagram of the cooperation between the safety hook and the piston rod of the shovel shaft type connector with front and rear double locking for excavators proposed by the present invention;

[0036] Figure 8 This is a schematic diagram of the state of the shovel-shaft type connector with front and rear double locking for an excavator in an embodiment of the present application before the attachment is hung;

[0037] Figure 9 This is a schematic diagram of the working state of the shovel-shaft connector with front and rear double locking for an excavator in an embodiment of the present application after the attachment is hung.

[0038] In the figure: 1. Locking bracket; 2. Connecting bracket; 3. Cylinder; 4. Fixed jaws; 5. Semicircular jaws; 6. Safety hook; 7. Grooved shaft; 8. Piston rod 1; 9. Piston rod 2; 10. Connecting plate; 11. Strip guide groove; 12. Guide plate; 13. Guide shaft; 14. Spring rod; 15. Sleeve; 16. First spring; 17. Fixing pin; 18. Connecting rod; 19. Second spring. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0040] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "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 limitations on the present invention.

[0041] Reference Figure 1-7 , a shovel-shaft connector with front and rear double locking for excavators, including a locking bracket 1 as a support member at the bottom position, used as an attachment connection module;

[0042] The connecting bracket 2 located at the top of the locking bracket 1 is used as a support member at the top position. The locking bracket 1 and the connecting bracket 2 are connected and fixed by a connecting assembly. The connecting bracket 2 is symmetrically provided with a boom pin;

[0043] The locking bracket 1 is internally provided with an oil cylinder 3, which is a multi-piston rod oil cylinder 3 arranged in a front-to-back staggered manner and provided with piston rods arranged in a front-to-back staggered manner;

[0044] The bottom ends of the locking bracket 1 are respectively provided with a fixed jaw 4 and a semicircular jaw 5;

[0045] The fixed jaws 4 are provided with a safety hook 6, and the semicircular jaws 5 are symmetrically provided with groove shafts 7;

[0046] The oil cylinder 3 controls the movement of the groove shaft 7 and the safety hook 6 respectively through the piston rod;

[0047] The safety hook 6 is used to lock and fix the jaws 4 through movement; the groove shaft 7 is used to lock the semicircular jaws 5 through movement.

[0048] like Figure 1-7 As shown, in a specific embodiment of the present application, the piston rod includes a piston rod 1 8 and a piston rod 2 9, and the piston rod 2 9 is used to cooperate with the safety hook 6;

[0049] The piston rod 8 is used to cooperate with the groove shaft 7;

[0050] The oil cylinder 3 causes the groove shaft 7 and the safety hook 6 to simultaneously extend and retract through the piston rod 1 8 and the piston rod 2 9;

[0051] The safety hook 6 locks the fixed jaws 4 by extending and releases the locking state by retracting;

[0052] The groove shaft 7 locks the semicircular jaws 5 by extending the groove shaft 7 and releases the locking state by retracting the groove shaft 7 .

[0053] It is not difficult to see from the above design that the safety hook 6 and the groove shaft 7 can respectively lock the fixed tiger's mouth 4 and the semicircular tiger's mouth 5 located at both ends of the locking bracket 1, realizing double locking at the front and rear ends, and the front and rear ends have different locking methods to adapt to different connection usage requirements.

[0054] The groove shaft 7 is a cylindrical structure with a groove. When the groove shaft 7 is in a locked state, it forms a circular structure with the semicircular jaws 5 to wrap / lock the outer circle of the shaft of the connecting attachment;

[0055] It is not difficult to see from the above design that after the groove shaft 7 is extended, the groove shaft 7 and the semicircular tiger's mouth 5 form a circular structure, which can well wrap the accessory shaft. At this time, most of the force exerted by the accessory on the connector is dispersed to the locking bracket 1 and the connecting bracket 2, reducing the force received by the cylinder 3, which can effectively reduce the risk of damage to the cylinder 3.

[0056] In addition, the semicircular jaws 5 and the grooved shaft 7 can cover most of the outer circumference of the attachment shaft, so that the attachment shaft is locked in the semicircular jaws 5, thereby increasing the safety of the attachment.

[0057] In a specific embodiment of the present application, a connecting plate 10 is provided at the bottom of the locking bracket 1, which cooperates with the groove shaft 7. The connecting plate 10 is connected to the piston rod 8. The piston rod 8 causes the symmetrically arranged groove shaft 7 to move synchronously through the connecting plate 10. The groove shaft 7 is fixed on the connecting plate 10. When the piston rod 8 moves, the groove shaft 7 and the connecting plate 10 are pushed to move synchronously, ensuring that the symmetrically arranged groove shaft 7 can lock the accessories at the same time when in use, which is convenient for simultaneous installation, connection and fixation.

[0058] like Figure 1-7 As shown, in a specific embodiment of the present application, the locking bracket 1 is provided with a strip guide groove 11 at the contact position between the connecting plate 10 and its two side walls, and a guide plate 12 is provided in the strip guide groove 11. The guide plate 12 and the connecting plate 10 are connected by a guide shaft 13. When the connecting plate 10 is subjected to the force of the piston rod and produces an extension or retraction action, the guide plate 12 is connected to the fixed connecting plate 10 through the guide shaft 13. The guide plate 12 performs axial movement within the restriction range of the strip guide groove 11 and controls the movement trajectory of the connecting plate 10 to avoid deviation in the movement trajectory and ensure stability in use.

[0059] like Figure 3-7 As shown, in a specific embodiment of the present application, a spring rod 14 is provided inside the groove shaft 7, and the spring rod 14 is inserted into a sleeve 15 that cooperates with the oil cylinder 3. The outer wall of the spring rod 14 is provided with a first spring 16 that cooperates with the sleeve 15. The first spring 16 is used to keep the groove shaft 7 in an extended state, so that the groove shaft 7 always has a tendency to extend.

[0060] The top of the safety hook 6 is provided with a fixing pin 17 connected to the locking bracket 1;

[0061] The bottom of the safety hook 6 is connected to the piston rod 2 9 through a connecting rod 18 , and the safety hook 6 rotates around the fixing pin 17 as an axis.

[0062] A second spring 19 is provided on the piston rod 2 9. The second spring 19 is located at the end of the piston rod 2 9 away from the safety hook 6. The second spring 19 is used to make the piston rod 2 9 that controls the safety hook 6 always have a tendency to extend, thereby driving the safety hook 6 to always have a tendency to extend. The second spring 19 provides assistance or resistance to the piston rod 2 9 during the extension / contraction process, thereby controlling the extension / contraction sequence of the piston rod 2 9 and the piston rod 1 8, so that the piston rod 1 8 and the piston rod 2 9 receive the extension / contraction force of the oil cylinder 3 at the same time, and have different sequences for completing the extension / contraction movements.

[0063] like Figure 1-9 As shown, it is not difficult to see from the above design that, because the oil cylinder 3 is a multi-piston rod oil cylinder 3 arranged in a staggered manner front and back, the piston rod 1 8 and the piston rod 2 9 can be extended and retracted at the same time. During operation, the fixed jaws 4 are hooked on the attachment shaft, and the oil cylinder 3 is actuated. The piston rods 1 8 and the piston rods 2 9 at the front and rear positions are extended at the same time. Due to the presence of the second spring 19, the piston rod 2 9 that controls the safety hook 6 will be extended first. Then the piston rod 2 9 drives the connecting rod 18, and the connecting rod 18 drives the safety hook 6 to extend, locking the fixed jaws 4.

[0064] The piston rod 8 drives the groove shaft 7 to extend, wrapping the other attachment shaft and locking the semicircular jaws at the same time;

[0065] When removing the attachment, the piston rod 1 8 and the piston rod 2 9 are retracted at the same time. However, due to the presence of the second spring 19, the piston rod 2 9 controlling the safety hook 6 retracts more slowly, and the groove shaft 7 will retract first and disengage from the attachment shaft. Then the safety hook 6 retracts, releasing the locking state of the fixed jaws 4 and disengaging from the other attachment shaft, thereby facilitating the overall installation, use and removal.

[0066] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A shovel-shaft connector with front and rear double locking for an excavator, comprising a locking bracket (1), a connecting bracket (2) located at the top of the locking bracket (1), a boom pin symmetrically provided on the connecting bracket (2), and an oil cylinder (3) provided inside the locking bracket (1), characterized in that: The bottom ends of the locking bracket (1) are respectively provided with a fixed jaw (4) and a semicircular jaw (5); The fixed jaws (4) are provided with a safety hook (6), and the semicircular jaws (5) are symmetrically provided with groove shafts (7); The oil cylinder (3) is provided with a plurality of piston rods arranged in a staggered manner in front and back, and the oil cylinder (3) controls the movement of the groove shaft (7) and the safety hook (6) respectively through the piston rods; The safety hook (6) is used to lock and fix the jaws (4) by movement; The groove shaft (7) is used to lock the semicircular jaws (5) through movement.

2. The shovel-shaft type connector with front and rear double locking for excavators according to claim 1, characterized in that: The piston rod comprises a piston rod 1 (8) and a piston rod 2 (9), and the piston rod 2 (9) is used to cooperate with the safety hook (6); The piston rod (8) is used to cooperate with the groove shaft (7); The oil cylinder (3) causes the groove shaft (7) and the safety hook (6) to simultaneously perform extension and retraction movements through the piston rod 1 (8) and the piston rod 2 (9); The safety hook (6) locks the fixed jaws (4) by extending and releases the locking state by retracting. The groove shaft (7) locks the semicircular jaws (5) by extending the movement, and releases the locking state by retracting the movement.

3. The shovel-shaft type connector with front and rear double locking for excavators according to claim 2, characterized in that: The groove shaft (7) is a cylindrical structure with a slot. When the groove shaft (7) is in a locked state, it forms a circular structure with the semicircular jaws (5) for wrapping / locking the outer circle of the shaft of the connecting attachment.

4. The shovel-shaft type connector with front and rear double locking for excavators according to claim 3, characterized in that: The bottom of the locking bracket (1) is provided with a connecting plate (10) that matches the groove shaft (7), and the connecting plate (10) is connected to the piston rod (8). The piston rod (8) causes the symmetrically arranged groove shaft (7) to move synchronously through the connecting plate (10).

5. The shovel-shaft type connector with front and rear double locking for excavators according to claim 4, characterized in that: The locking bracket (1) is provided with a strip guide groove (11) at a contact position between the connecting plate (10) and the side walls on both sides thereof. A guide plate (12) is provided in the strip guide groove (11). The guide plate (12) is connected to the connecting plate (10) via a guide shaft (13).

6. The shovel-shaft type connector with front and rear double locking for excavators according to claim 5, characterized in that: A spring rod (14) is provided inside the groove shaft (7), and the spring rod (14) is inserted into a sleeve (15) that matches the oil cylinder (3). The outer wall of the spring rod (14) is provided with a first spring (16) that matches the sleeve (15), and the first spring (16) is used to keep the groove shaft (7) in a continuously extended state.

7. The shovel-shaft type connector with front and rear double locking for excavators according to claim 6, characterized in that: A fixing pin (17) connected to the locking bracket (1) is provided on the top of the safety hook (6); The bottom of the safety hook (6) is connected to the second piston rod (9) via a connecting rod (18), and the safety hook (6) rotates around the fixing pin (17) as an axis.

8. The shovel-shaft type connector with front and rear double locking for excavators according to claim 7, characterized in that: A second spring (19) is provided on the second piston rod (9), and the second spring (19) is located at the end of the second piston rod (9) away from the safety hook (6). The second spring (19) is used to keep the second piston rod (9) matched with it in an extended state and to control the extension / contraction movement sequence of the second piston rod (9) and the first piston rod (8).

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