Quick change device of excavator

Abstract

The utility model relates to the technical field of excavator components, in particular to a quick change device of an excavator. A quick change device of an excavator comprises a connecting frame with a plurality of connecting ports formed in the two sides, a top cover arranged on the connecting frame and located between the connecting ports in the two sides, a driving assembly connected with the top cover and located on the lower side of the top cover, and biteplates connected with the driving assembly and located on the two sides of the driving assembly. And the biteplate is positioned below the connecting frame. By arranging the two biteplates with the adjustable distance, the quick change device can adapt to excavator replacement heads of different sizes, quick change of the machine head is achieved, the distance between the two biteplates is adjusted through cooperation of the driving assembly and the sliding assembly, and along with movement of the hydraulic air rod, the two movable rods with the included angle are opened and closed at the same time, so that the replacement of the machine head is achieved. Equivalent adjustment of the two biteplates is achieved, the distance between the biteplates is easy to calculate while stress balance is achieved, the arranged limiting assembly assists in adjustment of the distance between the biteplates, and the motion trails of the biteplates are limited.

Description

Technical Field

[0001] The utility model relates to the technical field of excavator components, in particular to an excavator quick-change device. Background Art

[0002] An excavator is an earth-moving machine that uses a bucket to dig materials above or below the surface of the machine and load them into a transport vehicle or unload them to a stockpile. The excavated materials are mainly soil, coal, silt, and pre-loosened soil and rocks. In order to meet the complex and changing construction environment and operating requirements, the excavator needs to be equipped with an excavator quick-change joint to meet the specific working requirements of the excavator.

[0003] However, in the prior art, the excavator driver manually adjusts the distance between the clamping parts to quickly change replacement heads of different types or sizes. This not only wastes the excavator driver's working time, but also leads to a decrease in the excavator's work completion rate. Therefore, an excavator quick-change joint is proposed. Utility Model Content

[0004] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained through the structures specifically pointed out in the description and other drawings of the description.

[0005] The utility model aims to overcome the above-mentioned shortcomings and provides an excavator quick-change device. By setting two bite plates with adjustable spacing, the quick-change device can adapt to the replacement heads of excavators of different sizes and realize rapid replacement of the machine heads. The spacing between the two bite plates is adjusted by the cooperation of a driving assembly and a sliding assembly. With the movement of the hydraulic gas rod, two movable rods with an angle are opened and closed at the same time, so that the two bite plates are adjusted equally, so that the force is balanced and the spacing of the bite plates is easy to calculate. The limit assembly provided assists in the adjustment of the spacing of the bite plates and limits the movement trajectory of the bite plates.

[0006] The utility model provides an excavator quick-change device, comprising a connecting frame with a plurality of connecting ports on both sides, a top cover arranged on the connecting frame and located between the connecting ports on both sides, a driving component connected to the top cover and located on the lower side of the top cover, and a bite plate connected to the driving component and located on both sides of the driving component, the bite plate being located below the connecting frame; the driving component comprises a fixed plate, a hydraulic cylinder and a movable rod, the fixed plate being connected to the top cover, the fixed plate being provided with the hydraulic cylinder, the fixed end of the hydraulic cylinder being connected to the fixed plate, the movable end of the hydraulic cylinder being rotatably connected to the movable rod, the movable rod being provided with two and being respectively rotatably connected to the bite plates on both sides, and an angle being provided between the two movable rods. The connecting frame and connecting port arranged on the top are used to cooperate and connect with the arm of the excavator. The top cover arranged is used to carry the operation of the driving assembly below, so that the arm can lift the replacement head of the excavator through the connecting frame and the top cover. The telescopic hydraulic cylinder cooperates with the movable rod to control the expansion and contraction of the bite plates on both sides. When the movable end of the hydraulic cylinder is extended, the angle between the two movable rods of the rotational connection is increased, and the movable rod pushes the bite plates on both sides to move outward. When the hydraulic cylinder contracts, the angle between the movable rods becomes smaller, causing the bite plates on both sides to move inward.

[0007] In some embodiments, a limit assembly is also included, along which the two bite plates slide, and the limit assembly includes a main limit groove, a main limit rod and a base. The base is extended upward from the middle of the main limit groove, and the top of the base is connected to the top cover. The main limit rods are extended outward on both sides of the base. In order to make the movement path of the bite plate controllable, a limit assembly is also required. The main limit rods extending outward on both sides of the base are provided for the bite plate to slide. The main limit groove provides support force and also limits the movement direction of the bite plate to prevent the bite plate from tilting during movement.

[0008] In some embodiments, a connection block is provided inside the bite plate, the top of the connection block is rotatably connected to the movable rod, and the bottom of the connection block contacts the main limit groove and slides along the main limit groove. The connection block is used to connect the bite plate and the movable rod, so that the movable rod can be rotatably connected to the bite plate, thereby changing the angle.

[0009] In some embodiments, the connection block is provided with a transverse sliding hole, and the bite plate is provided with a corresponding through hole, and the main limit rod extends to the outside of the bite plate after passing through the sliding hole and the through hole. The sliding hole and the through hole are provided to cooperate with the main limit rod so that the bite plate can slide along the main limit rod.

[0010] In some embodiments, the bite plate is further provided with a limit slot, the limit slot is located below the through hole and corresponds to the main limit slot, and the main limit slot extends to the outside of the bite plate after passing through the limit slot. The limit slot is used to accommodate the main limit slot so that the bite plate can slide along the main limit slot.

[0011] In some embodiments, the limit assembly further includes a limit card block, which is arranged at both ends of the main limit slot and located outside the bite plate, and the limit card block connects the main limit slot and the main limit rod. The limit card block controls the maximum opening amount of the bite plate, plays a limiting role, and controls the distance between the main limit slot and the end of the main limit rod, so that it is the same as the distance between the main limit slot and the main limit rod on the base.

[0012] In some embodiments, the front end of the bite plate is provided with bite teeth, which bite with the replacement head of the excavator. The bite teeth are used to bite with the corresponding matching grooves on the replacement head of the excavator. The bite plate with adjustable opening spacing enables the excavator to adapt to replacement heads with various opening widths, thereby achieving rapid replacement.

[0013] In some embodiments, a telescopic hole is provided at the end of the bite plate, a telescopic rod is provided at a position corresponding to the telescopic hole on the inner side of the bite plate, the movable end of the telescopic rod extends outside the telescopic hole, and the side of the telescopic rod is connected to the top cover. After the bite teeth on the front side of the quick-change device snap onto the corresponding matching groove on the replacement head, the rest of the bite plate gradually snaps onto the replacement head from front to back, and finally, when the telescopic hole matches the corresponding socket on the replacement head, the telescopic rod extends out and is horizontally inserted into the socket of the replacement head, thereby fixing the replacement head on the quick-change device.

[0014] In some embodiments, the front ends of the two bite plates are provided with auxiliary limiting holes, and an auxiliary limiting rod is slidably connected in the two auxiliary limiting holes. Both ends of the auxiliary limiting rod are provided with threads, and two nuts are screwed together at both ends of the auxiliary limiting rod through the threads, and the diameter of the nut is larger than the diameter of the auxiliary limiting hole. The auxiliary limiting rod is used to cooperate with the limiting assembly on the rear side to assist the sliding of the bite plate, so as to ensure that the opening and closing distances of the front and rear sides of the bite plate are the same during the sliding opening and closing of the bite plates on both sides, so as to achieve synchronous opening and closing and avoid the bite plate from being skewed. The nut at the end of the auxiliary limiting rod plays a limiting role to control the maximum opening amount of the bite plate. At the same time, the setting of the detachable nut enables the auxiliary limiting rod to be detachable.

[0015] In some embodiments, the front end of the top cover extends downward to be provided with a bite tongue, the bite teeth are located on both sides of the bite tongue, and the auxiliary limit rod is located above the bite tongue. The bite tongue cooperates with the bite teeth on both sides and is connected to the replacement head of the excavator to strengthen the supporting force. At the same time, the bite tongue plays a limiting role to prevent the bite plates on both sides from over-folding.

[0016] By adopting the above technical solution, the beneficial effects of the utility model are:

[0017] The utility model provides two bite plates with adjustable spacing, so that the quick-change device can adapt to the replacement heads of excavators of different sizes and realize rapid replacement of the machine heads. The spacing between the two bite plates is adjusted by the cooperation of a driving component and a sliding component. With the movement of the hydraulic gas rod, two movable rods with an angle are opened and closed at the same time, so that the two bite plates are adjusted equally, so that the spacing of the bite plates is easy to calculate while the forces are balanced. The provided limit assembly assists in the adjustment of the spacing of the bite plates and limits the movement trajectory of the bite plates.

[0018] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

[0019] Undoubtedly, these and other objects of the present invention will become more apparent after the following detailed description of the preferred embodiments described with reference to various figures and drawings.

[0020] In order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, one or several preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0022] In the drawings, the same reference numerals are used for the same components and the drawings are schematic and not necessarily drawn to scale.

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only one or several embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on such drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the quick-change device in some embodiments of the utility model;

[0025] Figure 2 It is a schematic diagram of the structure of the driving assembly and the limiting assembly in some embodiments of the utility model;

[0026] Figure 3 This is a schematic diagram of the principle of driving the bite plate to move by the driving assembly in some embodiments of the utility model.

[0027] Description of main reference numerals:

[0028] 1. Connecting frame;

[0029] 2. Connection port;

[0030] 3. Top cover;

[0031] 4. Drive components;

[0032] 41. Fixed plate; 42. Hydraulic cylinder; 43. Movable rod;

[0033] 5. Occlusal splint;

[0034] 51. Connecting block; 52. Engaging teeth; 53. Telescopic hole;

[0035] 6. Limiting components;

[0036] 61. Main limit slot; 62. Main limit rod; 63. Base; 64. Limit block;

[0037] 7. Telescopic rod;

[0038] 8. Auxiliary limit rod;

[0039] 9. Nut;

[0040] 10. Bite your tongue. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific implementation methods. It should be understood that the specific implementation methods described here are only used to explain the utility model, but not to limit the utility model.

[0042] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0043] In the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0044] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0045] Reference Figure 1 , Figure 1 It is a schematic diagram of the overall structure of the quick-change device in some embodiments of the utility model.

[0046] According to some embodiments of the utility model, the utility model provides an excavator quick-change device, including a connecting frame 1 with several connecting ports 2 on both sides, a top cover 3 arranged on the connecting frame 1 and located between the connecting ports 2 on both sides, a driving assembly 4 connected to the top cover 3 and located on the lower side of the top cover 3, and a bite plate 5 connected to the driving assembly 4 and located on both sides of the driving assembly 4, the bite plate 5 is located below the connecting frame 1; the driving assembly 4 includes a fixed plate 41, a hydraulic cylinder 42 and a movable rod 43, the fixed plate 41 is connected to the top cover 3, the fixed plate 41 is provided with the hydraulic cylinder 42, the fixed end of the hydraulic cylinder 42 is connected to the fixed plate 41, the movable end of the hydraulic cylinder 42 is rotatably connected to the movable rod 43, the movable rod 43 is provided with two and is respectively rotatably connected to the bite plates 5 on both sides, and an angle is set between the two movable rods 43. The connecting frame 1 and the connecting port 2 arranged on the top are used to cooperate with the arm of the excavator, and the top cover 3 is used to support the operation of the driving component 4 below, so that the arm can lift the replacement head of the excavator through the connecting frame 1 and the top cover 3. The telescopic hydraulic cylinder 42 cooperates with the movable rod 43 to control the expansion and contraction of the bite plates 5 on both sides. When the movable end of the hydraulic cylinder 42 is extended, the angle between the two movable rods 43 connected in rotation is increased, and the movable rod 43 pushes the bite plates 5 on both sides to move outward. When the hydraulic cylinder 42 contracts, the angle between the movable rods 43 becomes smaller, so that the bite plates 5 on both sides move inward.

[0047] The front end of the bite plate 5 is provided with bite teeth 52, which bite with the replacement head of the excavator. The bite teeth 52 are used to bite with the corresponding matching grooves on the replacement head of the excavator. The bite plate 5 with adjustable opening spacing allows the excavator to adapt to replacement heads with various opening widths, realizing rapid replacement.

[0048] Auxiliary limiting holes are provided at the front ends of the two bite plates 5, and an auxiliary limiting rod 8 is slidably connected in the two auxiliary limiting holes. Both ends of the auxiliary limiting rod 8 are provided with threads, and two nuts 9 are screwed to the two ends of the auxiliary limiting rod 8 through the threads, and the diameter of the nut 9 is larger than the diameter of the auxiliary limiting hole. The auxiliary limiting rod 8 is used to cooperate with the limiting assembly 6 on the rear side to assist the sliding of the bite plate 5, ensure that the opening and closing distances of the front and rear sides of the bite plate 5 are the same during the sliding opening and closing of the bite plates 5 on both sides, realize synchronous opening and closing, and avoid the bite plates 5 from being skewed. The nut at the end of the auxiliary limiting rod 8 plays a limiting role to control the maximum opening amount of the bite plate 5. At the same time, the setting of the detachable nut enables the auxiliary limiting rod 8 to be detachable.

[0049] The front end of the top cover 3 extends downward to be provided with a bite tongue 10, the bite teeth 52 are located on both sides of the bite tongue 10, and the auxiliary limit rod 8 is located above the bite tongue 10. The bite tongue 10 is provided to cooperate with the bite teeth 52 on both sides, and is connected to the excavator replacement head together, which plays a role in strengthening the supporting force. At the same time, the bite tongue 10 plays a limiting role to prevent the bite plates 5 on both sides from being over-closed.

[0050] Reference Figure 2-3 , Figure 2 It is a schematic diagram of the structure of the driving assembly and the limiting assembly in some embodiments of the utility model; Figure 3 This is a schematic diagram of the principle of driving the bite plate to move by the driving assembly in some embodiments of the utility model.

[0051] According to some embodiments of the utility model, a limiting assembly 6 is optionally included, along which the two bite plates 5 slide. The limiting assembly 6 includes a main limiting groove 61, a main limiting rod 62 and a base 63. The base 63 is extended upward from the middle of the main limiting groove 61. The top of the base 63 is connected to the top cover 3. The main limiting rods 62 are extended outward on both sides of the base 63. In order to make the moving path of the bite plate 5 controllable, a limiting assembly 6 is further provided. The main limiting rods 62 extending outward on both sides of the base 63 are provided for the bite plate 5 to slide. The main limiting groove 61 not only provides support force, but also has the function of limiting the moving direction of the bite plate 5 to prevent the bite plate 5 from being skewed during the movement.

[0052] A connecting block 51 is provided inside the bite plate 5, the top of the connecting block 51 is rotatably connected to the movable rod 43, and the bottom of the connecting block 51 abuts against the main limiting groove 61 and slides along the main limiting groove 61. The connecting block 51 is provided to connect the bite plate 5 and the movable rod 43, so that the movable rod 43 can be rotatably connected to the bite plate 5, thereby changing the angle.

[0053] The connecting block 51 is provided with a transverse sliding hole, and the bite plate 5 is provided with a corresponding through hole, and the main limiting rod 62 passes through the sliding hole and the through hole and then extends to the outside of the bite plate 5. The sliding hole and the through hole are provided to cooperate with the main limiting rod 62, so that the bite plate 5 can slide along the main limiting rod 62.

[0054] The bite plate 5 is also provided with a limit slot hole, which is located below the through hole and corresponds to the main limit slot 61. The main limit slot 61 passes through the limit slot hole and extends to the outside of the bite plate 5. The limit slot hole is used to accommodate the main limit slot 61, so that the bite plate 5 can slide along the main limit slot 61.

[0055] The limit assembly 6 further includes a limit block 64, which is disposed at both ends of the main limit slot 61 and is located outside the bite plate 5, and the limit block 64 connects the main limit slot 61 and the main limit rod 62. The limit block 64 controls the maximum opening amount of the bite plate 5, plays a limiting role, and controls the distance between the main limit slot 61 and the end of the main limit rod 62, so that it is the same as the distance between the main limit slot 61 and the main limit rod 62 on the base 63.

[0056] The end of the bite plate 5 is provided with a telescopic hole 53, and a telescopic rod 7 is provided at a position corresponding to the telescopic hole 53 on the inner side of the bite plate 5. The movable end of the telescopic rod 7 extends outside the telescopic hole 53, and the side of the telescopic rod 7 is connected to the top cover 3. After the bite teeth 52 on the front side of the quick-change device buckle the corresponding matching groove on the replacement head, the rest of the bite plate 5 gradually buckles with the replacement head from front to back, and finally, when the telescopic hole 53 matches the corresponding socket on the replacement head, the telescopic rod 7 extends out and is horizontally inserted into the socket of the replacement head, thereby fixing the replacement head on the quick-change device.

[0057] It should be understood that the embodiments disclosed in the present invention are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0058] The "embodiment" mentioned in the specification means that the specific features or characteristics described in conjunction with the embodiment are included in at least one embodiment of the present utility model. Therefore, phrases or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0059] In addition, the described features or characteristics may be combined in one or more embodiments in any other suitable manner. In the above description, some specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of the embodiments of the utility model. However, those skilled in the relevant art will understand that the utility model can be implemented without one or more of the above specific details or can also be implemented using other methods, components, materials, etc.

Claims

1. An excavator quick-change device, characterized in that: include A connecting frame, with a plurality of connecting ports arranged on both sides; A top cover, which is disposed on the connecting frame and located between the connecting ports on both sides; A drive assembly connected to the top cover and located at the underside of the top cover; A bite plate, which is connected to the drive assembly and located on both sides of the drive assembly, and the bite plate is located below the connecting frame; The driving assembly includes a fixed plate, a hydraulic cylinder and a movable rod. The fixed plate is connected to the top cover, the hydraulic cylinder is arranged on the fixed plate, the fixed end of the hydraulic cylinder is connected to the fixed plate, the movable end of the hydraulic cylinder is rotatably connected to the movable rod, two movable rods are arranged and are rotatably connected to the bite plates on both sides respectively, and an angle is arranged between the two movable rods.

2. The quick-change device for excavators according to claim 1, characterized in that: It also includes a limiting component, along which the two bite plates slide. The limiting component includes a main limiting groove, a main limiting rod and a base. A base is extended upward from the middle of the main limiting groove, and the top of the base is connected to the top cover. The main limiting rods are extended outward on both sides of the base.

3. The quick-change device for excavators according to claim 2, characterized in that: A connecting block is arranged on the inner side of the bite plate, the top of the connecting block is rotatably connected with the movable rod, and the bottom of the connecting block abuts against the main limiting groove and slides along the main limiting groove.

4. The quick-change device for excavators according to claim 3, characterized in that: The connecting block is provided with a transverse sliding hole, and the bite plate is correspondingly provided with a through hole. The main limiting rod passes through the sliding hole and the through hole and then extends toward the outside of the bite plate.

5. The quick-change device for excavators according to claim 4, characterized in that: The bite plate is also provided with a limiting slot hole, the limiting slot hole is located below the through hole and corresponds to the main limiting slot, and the main limiting slot passes through the limiting slot hole and extends toward the outside of the bite plate.

6. The quick-change device for excavators according to claim 2, characterized in that: The limiting assembly also includes a limiting card block, which is arranged at the two ends of the main limiting groove and located outside the bite plate, and the limiting card block connects the main limiting groove and the main limiting rod.

7. The quick-change device for excavators according to claim 1, characterized in that: The front end of the bite plate is provided with bite teeth, which bite with the replacement head of the excavator.

8. The quick-change device for excavators according to claim 1, characterized in that: A telescopic hole is provided at the end of the bite plate, a telescopic rod is provided at a position on the inner side of the bite plate corresponding to the telescopic hole, a movable end of the telescopic rod extends out of the telescopic hole, and a side edge of the telescopic rod is connected to the top cover.

9. The quick-change device for excavators according to claim 7, characterized in that: An auxiliary limiting hole is provided at the front end of the two bite plates, and an auxiliary limiting rod is slidably connected in the two auxiliary limiting holes. Both ends of the auxiliary limiting rod are provided with threads, and two nuts are screwed together at both ends of the auxiliary limiting rod through the threads, and the diameter of the nut is larger than the diameter of the auxiliary limiting hole.

10. The quick-change device for excavators according to claim 9, characterized in that: The front end of the top cover is downwardly extended to be provided with a bite tongue, the bite teeth are located on both sides of the bite tongue, and the auxiliary limiting rod is located above the bite tongue.

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