CN113235683A - Energy storage horizontal pushing connecting rod type self-locking reinforcing quick-changing device of excavator - Google Patents
Energy storage horizontal pushing connecting rod type self-locking reinforcing quick-changing device of excavator Download PDFInfo
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- CN113235683A CN113235683A CN202110781920.1A CN202110781920A CN113235683A CN 113235683 A CN113235683 A CN 113235683A CN 202110781920 A CN202110781920 A CN 202110781920A CN 113235683 A CN113235683 A CN 113235683A
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- locking
- sliding
- connecting rod
- rod
- hook
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/96—Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
- E02F3/962—Mounting of implements directly on tools already attached to the machine
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3618—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with two separating hooks
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/3604—Devices to connect tools to arms, booms or the like
- E02F3/3609—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat
- E02F3/3622—Devices to connect tools to arms, booms or the like of the quick acting type, e.g. controlled from the operator seat with a hook and a locking element acting on a pin
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Component Parts Of Construction Machinery (AREA)
Abstract
The invention discloses an energy-storage horizontal-pushing connecting rod type self-locking reinforcing quick changer of an excavator, wherein a connecting rod self-locking mechanism consisting of a sliding block, a connecting rod, a locking shaft, a compression rod and a nitrogen energy-storage type safety spring assembly is arranged on the left side and the right side of a locking oil cylinder; the sliding block is movably connected to the side plate bracket, the front end of the sliding block is hinged to the connecting rod, the middle of the sliding block is movably connected with the locking oil cylinder, the end face of the rear side of the sliding block is abutted to the compression rod, the connecting rod is hinged to the lock shaft, and the lock shaft is arranged in a guide hole in the front lock hook; the compression rod is movably arranged in the spring chamber and the nitrogen chamber, and the compression rod is connected with the spring chamber through a locking spring. This quick-change device utilizes the locking hydro-cylinder to provide the main power, utilizes the locking spring to play the auxiliary effect to the location of slider and the holding of contained angle between connecting rod and lock axle, and the pressure energy storage system that provides through nitrogen gas can further make the holding of locking contained angle, and the mechanism is in stable auto-lock state, still possesses the auto-lock function under the equal situation that loses efficacy of locking hydro-cylinder and locking spring, possesses triple safety guarantee nature.
Description
Technical Field
The invention belongs to the technical field of engineering machinery manufacturing, and particularly relates to an energy storage horizontal pushing connecting rod type self-locking reinforcing quick changer of an excavator.
Background
The excavator is widely applied to the field of engineering machinery manufacturing, a traditional excavator is provided with a working machine which is arranged between a small arm and two driving connecting rods, and the traditional excavator is provided with an excavator bucket, a gripper and the like; however, with the continuous expansion of the mechanical operation range of the excavator, the excavator has been expanded from the traditional function of excavating, crushing and backfilling realized by a bucket to the function of more than 10 functions of earth boring, vibration tamping, alligator pliers breaking, grapple clamping, loosening, rolling, tunneling, rock cutting and the like realized by installing different operation machines, so that the use value and the use range of the excavator are greatly improved. In order to meet the operation requirement, the operation machines need to be frequently replaced in the construction process. Traditional operation machines mounting means is connected the pilot hole on the equipment through two spinal branch axles with the pilot hole of excavator forearm front end and the pilot hole on the lower extreme of two drive connecting rods on forearm lower extreme next door, when needing to change the equipment, need knock out two spinal branch axles, counterpoint with the pilot hole on the new equipment of work again, go into two spinal branch axles repacking, because work device's whole weight is great, the process of counterpointing the installation just seems comparatively difficult, change speed is low, the availability factor of excavator has been reduced.
In order to quickly change various working machines and tools on an excavator, realize multiple purposes of one machine, reduce hoisting and dismounting time and further improve working efficiency, technical personnel in the field design a plurality of quick-change connecting devices of the excavator in succession, the quick-change connecting devices of the excavator are generally divided into two categories, namely a mechanical quick-change connecting device and a hydraulic quick-change connecting device, and a lock hook type quick-change connector of the hydraulic quick-change connecting device is frequently used due to convenient use and good locking force. However, the locking force of the front locking hook of the locking hook type hydraulic quick-change connector with the traditional structure completely depends on the locking hydraulic cylinder, so that the frequently-changed load of the working machine in the working process directly acts on the locking hydraulic cylinder, the service life of the locking hydraulic cylinder is easily reduced, the unhooking phenomenon that a connecting pin shaft of the working machine drops from the front locking hook or the rear locking hook is easily caused under the condition that the locking hydraulic cylinder is leaked and failed, and the working accident is easily caused.
In order to avoid the safety problem, the quick-change connector is further improved by the technical personnel in the field, for example, the normally closed excavator quick-change connector disclosed in chinese patent CN12227439A is additionally provided with a mechanical locking assembly consisting of a locking spring and a locking hook on the basis of conventional structures including a locking hydraulic cylinder, a front locking hook and a rear locking hook, and in the locking state, even if the locking hydraulic cylinder is leaked and fails, the U-shaped hook structure of the locking hook can be always clamped on the front mounting pin shaft of the working machine under the action of the reset elastic force of the locking spring, so as to avoid the falling of the working machine. Compared with the traditional connector, the connector is provided with the mechanical safety protection component, and the safety protection effect can be achieved to a certain extent.
But the one point of being worth noting is that when using this type of quick-change device, the operating personnel discovers that this type of mechanical protection subassembly has the potential safety hazard that the spring damaged in the in-process of using, in case pneumatic cylinder and spring are out of order simultaneously, and locking structure no longer plays the locking effect, and the construction operation safety can't obtain the efficient assurance from the risk that drops on the excavator still has to the construction equipment's that loads on it installation round pin axle.
Disclosure of Invention
The invention aims to provide an energy-storage horizontal-pushing connecting rod type self-locking reinforcing quick changer for an excavator, which enhances the use stability and safety by adding a nitrogen energy-storage type safety spring assembly, has the effect of triple safety guarantee, can still have the locking effect on an implement pin shaft by a locking shaft under the action of nitrogen pressure even if a locking oil cylinder and a locking spring are completely damaged, and has excellent safety protection performance.
The technical scheme disclosed by the invention is as follows: an energy storage horizontal pushing connecting rod type self-locking reinforcing quick changer of an excavator comprises side plate supports which are arranged in bilateral symmetry and a locking control assembly arranged between the side plate supports, wherein two pairs of assembling holes with mutually parallel central axes are correspondingly arranged at the upper parts of the side plate supports;
the locking control assembly comprises a front locking hook, a rear sliding locking hook and a locking oil cylinder;
the locking control assembly also comprises two groups of connecting rod self-locking mechanisms symmetrically arranged on the left side and the right side of the locking oil cylinder;
the connecting rod self-locking mechanism comprises a sliding block, a connecting rod, a locking shaft, a compression rod and a nitrogen energy storage type safety spring assembly;
the sliding block is movably connected to the side plate bracket on the corresponding side, the front end of the sliding block is hinged to the top end of the connecting rod, the bottom of the connecting rod is hinged to the top of the locking shaft, the locking shaft is correspondingly arranged in a guide hole in the upper panel of the front locking hook, the middle section of the sliding block is movably connected with a front connecting shaft of the locking oil cylinder, and the end face of the rear side of the sliding block is abutted to the end face of the front side of the compression rod;
the nitrogen energy storage type safety spring assembly comprises a fixed block, a spring chamber and a nitrogen chamber, wherein a compression rod is movably arranged in the spring chamber and the nitrogen chamber and can extend out of the spring chamber from the front end, and the compression rod is connected with the spring chamber through a locking spring.
Furthermore, the fixed block is fixedly connected to the side plate support on the corresponding side, the spring chamber and the nitrogen chamber are coaxially arranged in the fixed block in tandem, and the nitrogen chamber is provided with a gas injection port.
Furthermore, the front part of the spring chamber penetrates through the front surface of the fixing block, and the rear side surface of the spring chamber and the front side surface of the nitrogen chamber are correspondingly provided with a compression rod through hole; the compression rod comprises a cylindrical main rod and a spherical head, the diameter of the cylindrical main rod is matched with the aperture of the through hole of the compression rod, and the cylindrical main rod can horizontally shuttle in the spring chamber and the nitrogen chamber along the front-back direction through the through hole of the compression rod; one end of the locking spring is connected with the rear side surface of the spherical head, and the other end of the locking spring is connected with the rear side surface of the spring chamber.
Furthermore, a sliding groove matched with the sliding block on one corresponding side is formed in the position, corresponding to the sliding block on one corresponding side, of the side plate support, and the sliding block is connected into the sliding groove on one corresponding side and can slide in the front and back directions along the sliding groove.
Furthermore, the front lock hook is arranged at the front side of the lower part of the side plate support, the front lock hook is of a U-shaped hook opening structure with an opening surface facing the front side, and the left end and the right end of the front lock hook are connected to the side plate support on the corresponding side.
Further, the rear sliding lock hook is arranged below the rear part of the side plate bracket; the rear sliding lock hook comprises a sliding plate, connecting lugs and an arc hook plate, the arc hook plate is arranged at the front side of the lower part of the sliding plate, the arc hook plate and the sliding plate are combined to form a U-shaped hook opening structure with an opening facing the rear, a group of connecting lugs are symmetrically arranged at the left end and the right end above the sliding plate, and two coaxial sliding rod through holes are formed in the two connecting lugs respectively.
Furthermore, the rear end of a locking oil cylinder which is arranged in a telescopic mode in the front-back direction is connected with a connecting lug of a rear sliding lock hook through a rear connecting shaft, the aperture of a through hole of a sliding rod is matched with the outer diameter of the rear connecting shaft, main body grooves which are matched with the sliding rod and extend in the front-back direction are formed in the positions, corresponding to the two ends of the rear connecting shaft, of the inner side faces of the two side plate supports, and the rear connecting shaft is connected in the main body grooves and can slide back and forth along the main body grooves.
Furthermore, sliding plate rails extending in the front-back direction are arranged on the inner side surfaces of the two side plate supports and correspond to the left end and the right end of the sliding plate, and the sliding plate is connected to the sliding plate rails and can move front and back along the sliding plate rails.
Further, the front end and the rear end of the sliding block and the front end and the rear end of the sliding groove are both subjected to arc treatment.
Further, the front end and the rear end of the main body groove are subjected to arc treatment.
Compared with the prior art, the invention has the following advantages:
1. the quick changer disclosed by the application provides main power for clamping the mounting pin shaft of the working machine by using the locking oil cylinder, and has an auxiliary supporting effect by using the locking spring to position the sliding block and keep an included angle between the connecting rod and the locking shaft;
2. compared with a common mechanical safety protection assembly, the nitrogen pressure applying locking has the advantages that the failure condition is not easy to occur in the using process, the guarantee is strong, due to the existence of the nitrogen, the compression rod can simultaneously compress the nitrogen when retracting towards the fixed block under the action of the oil cylinder, the nitrogen can play a buffering role at the moment, the translational motion process of the locking oil cylinder and the compression rod is promoted to be more stable, and the operation stability is further improved;
3. the application discloses a horizontal push connecting rod type quick changer, wherein a front lock hook and a rear sliding lock hook are connected to a side plate support in a fixed connection and sliding connection mode, compared with a lock hook structure in the existing quick changer in a hinged connection mode, the connection mode is more stable, the hinged connection mode is easy to loose and break at a hinged part after being used for a long time, the problem can be well avoided by the connection mode adopted by the application, and the service life of equipment is longer;
4. the utility model discloses a locking control assembly's in quick-change machine overall structure is simple, and degree of automation is high, and artifical participation degree is little, and the quick replacement of both being convenient for operation machines improves the operating efficiency, and the later stage of being convenient for again is dismantled, is maintained, and the practicality is strong.
Drawings
FIG. 1 is a complete side view of an energy storage horizontal pushing link type self-locking reinforced quick changer of an excavator;
FIG. 2 is an isometric view of the quick release assembly shown in FIG. 1 with the right side bracket removed from the quick release;
FIG. 3 is a schematic front view of the quick change assembly shown in FIG. 2;
FIG. 4 is a schematic top view of the quick-change assembly shown in FIG. 2;
FIG. 5 is an isometric view of the quick-change assembly shown in FIG. 2 with the locking cylinder removed;
FIG. 6 is a schematic front view of the quick-change assembly shown in FIG. 5;
FIG. 7 is an isometric view of the quick-change assembly shown in FIG. 5 with the self-locking mechanism of the linkage removed;
FIG. 8 is a schematic front view of the quick change assembly of FIG. 7;
FIG. 9 is a cross-sectional view of the nitrogen stored energy relief spring assembly of FIG. 6 taken along the direction A-A;
FIG. 10 is a state of the compression rod after it has been compressed;
the locking mechanism comprises a side plate support 1, an assembly hole 2, a front locking hook 3, a rear sliding locking hook 4, a locking oil cylinder 5 and a connecting rod self-locking mechanism 6;
11-runner, 12-sled track, 13-body groove;
31-a pilot hole;
41-sliding plate, 42-connecting lug, 43-arc hook plate and 44-sliding rod through hole;
51-front connecting shaft, 52-rear connecting shaft;
61-slide block, 62-connecting rod, 63-lock shaft, 64-compression rod, 65-nitrogen energy storage type safety spring component;
641-cylindrical main stem, 642-spherical head;
651-fixed block, 652-spring chamber, 653-nitrogen chamber, 654-locking spring, 655-compression rod through hole.
Detailed Description
The technical solution of the present invention is further described below with reference to the accompanying drawings, but not limited thereto, and any modification or equivalent replacement of the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention shall be covered by the protection scope of the present invention.
The excavator energy storage horizontal pushing connecting rod type self-locking reinforcing quick changer disclosed in the embodiment comprises side plate supports 1 which are arranged in bilateral symmetry and a locking control assembly arranged between the side plate supports 1, wherein two pairs of assembling holes 2 with central axes parallel to each other are correspondingly arranged at the upper parts of the side plate supports and are used for being correspondingly connected with assembling holes in an excavator mechanical arm and a driving connecting rod.
The locking control assembly comprises a front locking hook 3, a rear sliding locking hook 4, a locking oil cylinder 5 and a connecting rod self-locking mechanism 6;
the front lock hook 3 and the rear sliding lock hook 4 are respectively arranged at the front side and the rear side of the side plate bracket 1, the rear end of the locking oil cylinder 5 is connected with the rear sliding lock hook 4, and the front end is connected with the connecting rod self-locking mechanism 6;
be equipped with a set of connecting rod self-locking mechanism 6 respectively that the left and right both sides at locking hydro-cylinder 5 are the symmetry, connecting rod self-locking mechanism 6 includes slider 61, connecting rod 62, lock axle 63, compression rod 64 and nitrogen gas energy storage formula safety spring assembly 65, and slider 61 swing joint is on the curb plate support 1 of corresponding one side, specifically, is equipped with spout 11 with the position that corresponding one side slider 61 corresponds on curb plate support 1, and slider 61 connects in the spout 11 of corresponding one side and can follow it and carry out the slip of preceding, back direction. The front end of the slide block 61 is hinged with the top end of the connecting rod 62, the bottom of the connecting rod 62 is hinged with the top of the locking shaft 63, a guide hole 31 which is penetrated up and down is arranged on the upper panel of the front lock hook 3 corresponding to the lock shaft 63, the lock shaft 63 is arranged in the guide hole 31, the middle section of the slide block 61 is hinged with the front connecting shaft 51 of the locking oil cylinder 5, the rear end face of the slide block 61 is abutted with the front end face of the compression rod 64, the nitrogen energy storage type safety spring assembly 65 comprises a fixed block 651, a spring chamber 652 and a nitrogen chamber 653, the fixed block 651 is fixedly connected on the side plate bracket 1 on the corresponding side, the spring chamber 652 and the nitrogen chamber 653 are coaxially arranged in the fixed block 651 in tandem, the nitrogen gas chamber 653 is provided with a gas injection port, the compression rod 64 is movably disposed in the spring chamber 652 and the nitrogen gas chamber 653 and can extend out of the spring chamber 652 from the front end, and the compression rod 64 and the spring chamber 652 are connected by a lock spring 654.
The specific structure of the spring chamber 652 and the nitrogen gas chamber 653 is: the front part of the spring chamber 652 penetrates through the front surface of the fixed block 651, the rear side surface of the spring chamber 652 and the front side surface of the nitrogen chamber 653 are correspondingly provided with a compression rod through hole 655, the compression rod 64 is of a two-section design and comprises a cylindrical main rod 641 and a spherical head 642, and the spherical head design is convenient for the compression rod 64 to be in better contact with the sliding block 61 in the transmission process, so that the conduction force is furthest, the direct friction of materials is reduced, and the smoothness of the movement process is improved; the diameter of the cylindrical main rod 641 is adapted to the diameter of the compression rod through hole 655, the cylindrical main rod 641 horizontally shuttles back and forth between the spring chamber 652 and the nitrogen chamber 653 through the compression rod through hole 655, and the locking spring 654 has one end connected to the rear side of the spherical head 642 and the other end connected to the rear side of the spring chamber 652.
The front lock hook 3 is arranged at the front side of the lower part of the side plate bracket 1, the front lock hook 3 is of a U-shaped hook opening structure with an opening facing the front side and used for clamping a front mounting pin shaft of a working machine, and the left end and the right end of the front lock hook 3 are connected to the side plate bracket 1 on the corresponding side;
in order to improve the stability of the lock shaft 63 during the movement process, the bottom end surface of the lock shaft 63 in the initial state extends to below the lower surface of the upper panel of the front lock hook 3 (i.e. the same condition as the lock shaft 63 in the locked state, specifically refer to fig. 3), when the lock shaft 63 is lifted upwards to the highest state under the transmission action of the link self-locking mechanism 6 so as to be clamped into the front mounting pin shaft of the working implement, the lock shaft 63 is still located in the guide hole 31 and cannot be separated from the guide hole 31 to affect the subsequent locking again, but the bottom surface of the lock shaft 63 is higher than the lower surface of the upper panel of the front lock hook 3, and such a design does not cause position interference to the clamping process of the front mounting pin shaft of the working implement.
The rear sliding lock hook 4 is arranged below the rear part of the side plate support 1, the rear sliding lock hook 4 comprises a sliding plate 41, connecting lugs 42 and an arc hook plate 43, the arc hook plate 43 is arranged at the front side of the lower part of the sliding plate 41, the arc hook plate 43 and the sliding plate 41 are combined to form a U-shaped hook opening structure with a backward opening surface and used for clamping a rear mounting pin shaft of a working machine, a group of connecting lugs 42 are symmetrically arranged at the left end and the right end above the sliding plate 41, and two coaxial sliding rod through holes 44 are respectively arranged on the two connecting lugs 42.
The rear end of a locking oil cylinder 5 which is telescopically arranged along the front-back direction is connected with a connecting lug 42 of a rear sliding locking hook 4 through a rear connecting shaft 52, the aperture of a through hole 44 of a sliding rod is matched with the outer diameter of the rear connecting shaft 52, main body grooves 13 which extend along the front-back direction are arranged on the inner side surfaces of the two side plate brackets 1 and correspond to the two ends of the rear connecting shaft 52, and the rear connecting shaft 52 is connected in the main body grooves 13 and can slide back and forth along the main body grooves;
the sliding plate rails 12 extending in the front-back direction are arranged at positions corresponding to the left end and the right end of the sliding plate 41 on the inner side surfaces of the two side plate supports 1, the sliding plate 41 is connected to the sliding plate rails 12 and can move back and forth along the sliding plate rails, the stability of the moving process of the sliding plate 41 is enhanced by the design, the connection stability of the arc-shaped hook plate 43 clamped into the rear mounting pin shaft of the operation machine is improved, the structure can transfer the main stress of the quick changer in the operation process to a support structure, and the problem that the movement process is blocked or parts are damaged due to the fact that the rear sliding lock hook 4 and the rear connecting shaft 52 bear overlarge gravity is solved.
The front end and the rear end of the sliding block 61 and the front end and the rear end of the sliding groove 11 are both subjected to arc treatment, and the design can prevent the sliding block 61 from being rigidly collided and damaged when in sliding contact with the end part of the sliding groove 11.
The front and rear ends of the main body groove 13 are also processed by arc treatment, and the design can prevent rigid collision damage when the rear connecting shaft 52 is in sliding contact with the end part of the main body groove 13.
The concrete working process of the quick changer is as follows:
after the parts are completely assembled, nitrogen is filled into the nitrogen chamber 653 from the gas injection port to a certain pressure, and energy is stored. Due to the presence of the nitrogen pressure, even if the locking spring 654 is not provided, the compression rod 64 assumes a forwardly ejected state, and the lock shaft 63 is now in a downwardly ejected state on the front lock hook 3 by the hinge transmission action.
Then the locking oil cylinder 5 is pressurized and contracted to drive the rear sliding lock hook 4 to move forwards along the main body groove 13, the rear connecting shaft 52 touches the front end part of the main body groove 13, the rear sliding lock hook 4 stops moving, the locking oil cylinder 5 is further contracted, the front connecting shaft 51 drives the slider 61 to move backwards, the compression rod 64 is pushed backwards in the moving process of the slider 61, the locking spring 654 is stressed and compressed, the compression rod 64 extending into the nitrogen chamber 653 compresses nitrogen in the nitrogen chamber, in addition, the slider 61 moving backwards drives the connecting rod 62 to rotate clockwise, the connecting rod 62 drives the lock shaft 63 to slide in the guide hole 31 and lift upwards, finally, the bottom surface of the lock shaft 63 is higher than the bottom surface of the upper panel of the front lock hook 3, and at the moment, the front mounting pin shaft of the working machine tool can be clamped into the U-shaped hook opening 653 of the front lock hook 3;
subsequently, the locking oil cylinder 5 extends to drive the rear sliding lock hook 4 to move backwards along the main body groove 13, the rear connecting shaft 52 touches the rear end part of the main body groove 13, the rear sliding lock hook 4 stops moving, the locking oil cylinder 5 further extends, the front connecting shaft 51 drives the sliding block 61 to move forwards, the pressure of the front part of the compression rod 64 is reduced in the moving process of the sliding block 61, the sliding block 61 extends forwards under the action of the elastic restoring force of the locking spring 654 and the nitrogen pressure, the sliding block 61 moving forwards drives the connecting rod 62 to rotate anticlockwise, and the connecting rod 62 drives the locking shaft 63 to slide downwards in the guide hole 31 to protrude out of the lower surface of the front lock hook 3 and then can lock the front shaft.
Because the locking spring 654 at this moment keeps certain compression capacity, the nitrogen gas injected in the nitrogen gas chamber 653 also provides pressure for the slider 61 before at the same time, under the condition that the locking cylinder 5 fails, the locking spring 654 can continue to provide pressure to make the connecting rod 62 and the locking shaft 63 keep the included angle state, even if the locking spring 654 fails at this moment, the pressure provided by the nitrogen gas can also make the connecting rod 62 and the locking shaft 63 keep the included angle state, when the front mounting pin shaft of the working machine needs to be disengaged from the U-shaped hook mouth part of the front locking hook 3 and exerts break-away force on the locking shaft 63, because the included angle state of the connecting rod 62 and the locking shaft 63 is unchanged under the action of the nitrogen gas pressure, the mechanism is still in the stable self-locking state at this moment, the front mounting pin shaft is tightly clamped, the front mounting pin shaft can be ensured not to fall, and the operation safety is further improved. Under the state that locking hydro-cylinder 5 and locking spring 654 all became invalid, even nitrogen pressure can not make connecting rod and lock axle keep the contained angle state for a long time, the locking of a period of time also can provide sufficient reaction time for the operation personnel, the problem that the operation machines and tools fall suddenly and lead to the incident can not appear, holistic security still can obtain fine assurance.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. An energy storage horizontal pushing connecting rod type self-locking reinforcing quick changer of an excavator comprises side plate supports (1) which are arranged in bilateral symmetry and a locking control assembly arranged between the side plate supports (1), wherein two pairs of assembling holes (2) with mutually parallel central axes are correspondingly arranged at the upper part of each side plate support (1);
the locking control assembly comprises a front locking hook (3), a rear sliding locking hook (4) and a locking oil cylinder (5);
it is characterized in that the preparation method is characterized in that,
the locking control assembly also comprises two groups of connecting rod self-locking mechanisms (6) which are symmetrically arranged at the left side and the right side of the locking oil cylinder (5);
the connecting rod self-locking mechanism (6) comprises a sliding block (61), a connecting rod (62), a locking shaft (63), a compression rod (64) and a nitrogen energy storage type safety spring assembly (65);
the sliding block (61) is movably connected to the side plate bracket (1) on the corresponding side, the front end of the sliding block (61) is hinged to the top end of the connecting rod (62), the bottom of the connecting rod (62) is hinged to the top of the locking shaft (63), the locking shaft (63) is correspondingly arranged in the guide hole (31) on the upper panel of the front locking hook (3), the middle section of the sliding block (61) is movably connected with the front connecting shaft (51) of the locking oil cylinder (5), and the end face of the rear side of the sliding block (61) is abutted to the end face of the front side of the compression rod (64);
the nitrogen energy storage type safety spring assembly (65) comprises a fixed block (651), a spring chamber (652) and a nitrogen chamber (653), a compression rod (64) is movably arranged in the spring chamber (652) and the nitrogen chamber (653) and can extend out of the spring chamber (652) from the front end, and the compression rod (64) is connected with the spring chamber (652) through a locking spring (654).
2. The energy-storing horizontal-pushing connecting rod type self-locking reinforced quick changer of the excavator as claimed in claim 1, wherein a fixing block (651) is fixedly connected to the side plate bracket (1) on the corresponding side, a spring chamber (652) and a nitrogen chamber (653) are coaxially arranged in the fixing block (651) in tandem, and a gas injection port is arranged on the nitrogen chamber (653).
3. The energy-storing horizontal-pushing connecting rod type self-locking reinforcing quick changer of the excavator as claimed in claim 2, wherein the front part of the spring chamber (652) penetrates through the front surface of the fixing block (651), and the rear side surface of the spring chamber (652) and the front side surface of the nitrogen chamber (653) are correspondingly provided with a compression rod through hole (655);
the compression rod (64) comprises a cylindrical main rod (641) and a spherical head (642), the diameter of the cylindrical main rod (641) is matched with the aperture size of the compression rod through hole (655), and the cylindrical main rod (641) can horizontally shuttle in the spring chamber (652) and the nitrogen chamber (653) along the front-back direction through the compression rod through hole (655);
one end of the locking spring (654) is connected with the rear side surface of the spherical head (642), and the other end is connected with the rear side surface of the spring chamber (652).
4. The energy-storing horizontal-pushing connecting rod type self-locking reinforcing quick-change device of the excavator according to claim 1, wherein a matched sliding groove (11) is formed in the position, corresponding to the sliding block (61) on the corresponding side, of the side plate bracket (1), and the sliding block (61) is connected in the sliding groove (11) on the corresponding side and can slide along the sliding groove in the front and back directions.
5. The energy-storing horizontal-pushing link type self-locking reinforcing quick changer of the excavator according to claim 1, wherein the front lock hook (3) is arranged at the position of the front side of the lower part of the side plate bracket (1), the front lock hook (3) is of a U-shaped hook opening structure with an opening facing the front side, and the left end and the right end of the front lock hook (3) are connected to the side plate bracket (1) on the corresponding side.
6. The energy-storing horizontal-pushing connecting rod type self-locking reinforcing quick changer of the excavator according to claim 1, characterized in that a rear sliding lock hook (4) is arranged below the rear part of the side plate bracket (1);
the rear sliding lock hook (4) comprises a sliding plate (41), connecting lugs (42) and an arc hook plate (43), the arc hook plate (43) is arranged at the front side of the lower part of the sliding plate (41), the arc hook plate (43) and the sliding plate (41) are combined to form a U-shaped hook opening structure with an opening facing to the rear, a group of connecting lugs (42) are symmetrically arranged at the left end and the right end above the sliding plate (41), and two coaxial sliding rod through holes (44) are respectively formed in the two connecting lugs (42).
7. The energy-storage horizontal-pushing connecting rod type self-locking reinforcing quick changer of the excavator according to claim 6, wherein the rear end of a locking oil cylinder (5) which is telescopically arranged in the front-back direction is connected with a connecting lug (42) of a rear sliding locking hook (4) through a rear connecting shaft (52), the aperture of a through hole (44) of a sliding rod is matched with the outer diameter of the rear connecting shaft (52), main body grooves (13) which are matched with the sliding rod and extend in the front-back direction are formed in positions, corresponding to the two ends of the rear connecting shaft (52), on the inner side surfaces of the two side plate supports (1), and the rear connecting shaft (52) is connected in the main body grooves (13) and can slide back and forth along the main body grooves.
8. The energy-storing horizontal-pushing link type self-locking reinforcing quick changer of the excavator according to claim 6, wherein sliding plate rails (12) extending in the front-rear direction are arranged on the inner side surfaces of the two side plate brackets (1) at positions corresponding to the left and right ends of the sliding plate (41), and the sliding plate (41) is connected to the sliding plate rails (12) and can move forward and backward along the sliding plate rails.
9. The energy-storing horizontal-pushing connecting rod type self-locking reinforcing quick-change device of the excavator according to claim 4, wherein the front end and the rear end of the sliding block (61) and the front end and the rear end of the sliding groove (11) are both subjected to circular arc treatment.
10. The energy-storing horizontal-pushing connecting rod type self-locking reinforcing quick changer of the excavator as claimed in claim 7, wherein the front end and the rear end of the main body groove (13) are processed into circular arcs.
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| CN202110781920.1A CN113235683B (en) | 2021-07-12 | 2021-07-12 | Energy storage horizontal pushing connecting rod type self-locking reinforcing quick-changing device of excavator |
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| CN202110781920.1A CN113235683B (en) | 2021-07-12 | 2021-07-12 | Energy storage horizontal pushing connecting rod type self-locking reinforcing quick-changing device of excavator |
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| CN113235683B CN113235683B (en) | 2021-10-01 |
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| CN116005740A (en) * | 2023-02-10 | 2023-04-25 | 徐州巴特工程机械股份有限公司 | Quick-change three-dimensional transmission self-locking grapple system of excavator |
| CN117364870A (en) * | 2023-11-02 | 2024-01-09 | 泰安嘉和重工机械有限公司 | Auxiliary tool quick-change connector of hydraulic excavator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117364870B (en) * | 2023-11-02 | 2024-04-05 | 泰安嘉和重工机械有限公司 | Auxiliary tool quick-change connector of hydraulic excavator |
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| CN113235683B (en) | 2021-10-01 |
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