Simple excavator quick-change device

Abstract

The invention discloses a simple excavator quick-change device which comprises a connecting frame, a hanging plate and a fixing pin shaft. The connecting frame is hinged to the machine arm through the connecting frame shaft sleeve and the machine arm pin shaft hole by using the bucket rod pin shaft and the connecting rod pin shaft, and the connecting frame does not need to be disassembled, assembled and replaced in the follow-up process generally. The hanging plate is connected with the connecting frame shaft sleeve through the hanging plate hanging lug and the hanging plate positioning groove; the hanging plate is welded and assembled with the original accessory refitted and customized accessory; when the accessory is installed, the control machine arm enables the shaft sleeve at one end of the connecting frame to be hung on the hanging lug of the accessory hanging plate, the control machine arm enables the shaft sleeve at the upper middle portion of the connecting frame to coincide with the hanging plate positioning groove, then the fixing pin shaft and the D-shaped lock pin are inserted to complete installation of the accessory, and when the accessory is replaced, only the D-shaped lock pin and the fixing pin shaft need to be detached. And then the machine arm is controlled to separate the connecting frame shaft sleeve from the excavator accessories, and the excavator operator can easily replace various accessories of the excavator by one person.

Description

Technical Field

[0001] The present invention relates to the technical field related to excavators, and in particular to a simple quick-change device for excavators. Background Art

[0002] Due to different working conditions, the excavator needs to replace various excavator accessories when working. For example, when working on cement ground, rock and other working conditions, the breaker hammer attachment should be replaced for crushing operations, but the pin shaft is easy to break when using the breaker hammer attachment; when excavating soft soil, loading and unloading soft materials and other working conditions, the digging force requirement for the bucket is not high, and it can be replaced with a bucket attachment with a larger bucket capacity; when encountering harder working conditions such as crushed stone and frozen soil, it should be replaced with a single hook attachment, and the material should be loosened and then replaced with a bucket attachment to improve work efficiency; a rake attachment will be used for deep plowing; after the excavator attachment itself has been used for a period of time, due to wear and tear, etc., it is also necessary to replace new excavator attachments. By equipping the excavator with a quick-change device, it is convenient to implement the work.

[0003] Most of the existing quick-change devices for excavators replace the excavator accessories through hydraulic, mechanical and other means. On the one hand, hydraulic quick-change requires installation of oil circuits, and mechanical quick-change requires screwing, which takes a long time. On the other hand, after high-intensity operations, hydraulic quick-change is prone to oil leakage and damage to oil pipes, and mechanical quick-change is prone to thread deformation and breakage, as well as accessories that are easy to fall off and increase excessive weight, which poses certain safety hazards. In addition, hydraulic, mechanical and other quick-change devices will change the installation hole positions of the original excavator accessories, that is, the machine arm needs to be installed with hydraulic, mechanical and other quick-change devices first, and then various accessories are installed through quick-change devices. When using bucket accessories, the distance from the attachment arm and connecting rod installation hole position to the machine arm and connecting rod installation hole position will be lengthened, and the distance between the attachment arm installation hole position and the shovel lip will be increased, reducing the excavation force, resulting in a smaller excavation force of the accessories installed at the original vehicle hole position when the excavator is working. The change in the attachment installation hole position makes it impossible for the excavator bucket to be closed or opened during operation, resulting in a long-term impact on the operation of the excavator. Summary of the invention

[0004] In view of the shortcomings existing in the use of the existing excavator quick-change device raised in the background technology, the present invention provides a simple excavator quick-change device, which has the advantages of using three pins to fix accessories, preventing accessories from falling, adding less weight, not changing the installation hole positions of the original accessories of the excavator, not changing the excavation force, and preventing the bucket accessories from being unable to be retracted or opened during operation. It is safer and more reliable during operation, etc., and solves the technical problems raised in the above-mentioned background technology.

[0005] The present invention provides the following technical solutions: a simple excavator quick-change device, comprising a connecting frame, a hanging plate, and a fixed pin shaft; the connecting frame is hinged with the excavator arm; the hanging plate is welded to the excavator accessories, and the excavator accessories need to remove the hanging plates at the installation locations of the bucket arm pin shaft and the connecting rod pin shaft of the original vehicle accessories, and new hanging plates are designed according to the installation holes of the bucket arm and the connecting rod pin shaft of the original vehicle accessories, and are welded and assembled with the accessories, and the connecting frame is designed and welded according to the hanging plates, so as to keep the installation holes of the accessories consistent with the installation holes of the original vehicle accessories, and when the excavator accessories are worn and need to be replaced, they can be directly made into various accessories used in the simple excavator quick-change device; the connecting frame and the hanging plate are hung and matched, and the accessories are installed and replaced through the fixed pin shaft and the D-type locking pin.

[0006] Simply put, the connecting frame includes a connecting frame plate body, a shaft sleeve with holes, a shaft sleeve without holes, and a shaft sleeve with fixed holes, which is hinged to the excavator arm through the arm pin shaft hole; the hanging plate includes a hanging plate body, a hanging plate reinforcement body, and is welded to the excavator accessories; the connecting frame and the hanging plate are fixed by a fixed pin shaft.

[0007] Simply, the connecting frame is hinged to the excavator arm through the connecting frame pin hole and the arm pin hole with the boom pin and the connecting rod pin, and the perforated bushing is provided with bushing screw holes for fixing the boom pin and the connecting rod pin.

[0008] Simply, the control arm hinges the perforated sleeve and the non-perforated sleeve at one end of the connecting frame with the hanging plate hanging ear at one end of the hanging plate, and the control arm makes the perforated sleeve and the non-perforated sleeve in the middle part of the connecting frame coincide with the hanging plate positioning groove in the middle part of the hanging plate, that is, the connecting frame fixing pin shaft hole coincides with the hanging plate fixing pin shaft hole, and the fixing pin shaft is inserted into the hanging plate fixing pin shaft hole and the connecting frame fixing pin shaft hole to complete the fixing structure of the three pin shafts of the excavator accessories, thereby increasing the simple quick change of the excavator and the overall safety and stability of the accessories during operation.

[0009] Simply, the D-shaped locking pin hole on the fixed pin shaft coincides with the D-shaped locking pin fixing hole on the fixed shaft sleeve, and the D-shaped locking pin is inserted into the D-shaped locking pin fixing hole to complete the installation of various accessories.

[0010] The described excavator attachment is simply installed, and the shaft sleeve with holes and the shaft sleeve without holes at one end of the connecting frame are coaxial with the arm pin shaft hole of the bucket arm pin shaft on the excavator arm, and the shaft sleeve with holes and the shaft sleeve without holes in the middle part of the connecting frame are coaxial with the arm pin shaft hole of the connecting rod pin shaft on the arm; the shaft sleeve with holes and the shaft sleeve without holes at one end of the connecting frame are coaxial with the hanging plate hanging ear at one end of the hanging plate, the shaft sleeve with holes and the shaft sleeve without holes in the middle part of the connecting frame are coaxial with the hanging plate positioning groove in the middle part of the hanging plate, and the connecting frame fixing pin shaft hole on the connecting frame is coaxial with the hanging plate fixing pin shaft hole on the hanging plate; that is, the installation hole position of the original vehicle of the excavator attachment will not be changed, and the excavation force of the excavator during operation will not be reduced.

[0011] Simply put, the connecting frame includes: a left connecting frame plate, a right connecting frame plate, two shaft sleeves with holes, two shaft sleeves without holes and a shaft sleeve with fixed holes, which are assembled into an integral connecting frame by welding to protect the boom pin, the connecting rod pin and the fixed pin.

[0012] Simply, the hanging plate includes: a left hanging plate body, a right hanging plate body and two hanging plate reinforcement plates which are assembled into a whole with the excavator accessories through welding.

[0013] It is simple. When replacing the excavator attachments, you only need to remove the D-shaped locking pin and the fixing pin shaft, control the machine arm to perform hanging disassembly and assembly of the connecting frame and the hanging plate, and you can easily replace any excavator attachment (attachments equipped with hanging plates).

[0014] The present invention has the following beneficial effects: 1. The present invention realizes the rapid installation and replacement of excavator attachments (attachments equipped with hanging plates) by fixing the pin shaft and the D-type pin lock. The excavator operator can easily complete the installation and replacement of any attachment, and the three pin shafts are more safe and reliable to fix the attachment; 2. The invention is different from hydraulic, mechanical and other quick-change devices for excavators. Its connecting frame and hanging plate are designed according to the installation holes of the original excavator attachments. It will not change the installation hole position of the attachment arm, will not change the digging force, will not cause the bucket attachment to fail to be closed or opened during operation, will not cause attachments to fall, etc., and the operation effect is the same as when the quick-change device is not installed; 3. The connecting frame of the present invention is an integral body, and the shaft sleeves welded on the connecting frame have a very strong protective effect on the boom pin, the connecting rod pin and the fixed pin. The pins will basically not be damaged. The connecting frame does not need to be disassembled after installation, and no maintenance is required in the later stage. The hanging plate and the accessories are an integral body. The weight added by the simple excavator quick-change device of the present invention is negligible compared with the hydraulic, mechanical and other quick-change devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the machine arm, connecting frame and bucket attachment according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly structure of the connecting frame and the hanging plate according to an embodiment of the present invention; Figure 3 A schematic diagram of the structure of a connecting frame according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the hanging plate structure of an embodiment of the present invention; Figure 5 It is a schematic diagram of the structure of the machine arm and the connecting frame and the breaker hammer attachment before assembly according to an embodiment of the present invention; Figure 6It is a structural schematic diagram of the machine arm and the connecting frame and the breaker hammer attachment in the embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the machine arm, the connecting frame and the breaker hammer attachment after assembly according to the embodiment of the present invention; Figure 8 This is a schematic diagram of a fixed pin installation structure according to an embodiment of the present invention; Fig. 9 This is a schematic diagram of the D-type lock pin installation structure of an embodiment of the present invention; Fig.10 This is a schematic diagram of the assembly structure of a bucket attachment according to an embodiment of the present invention; Fig.11 A schematic diagram of the assembly structure of a single hook attachment according to an embodiment of the present invention; Fig.12 It is a schematic diagram of the assembly structure of the rake attachment according to an embodiment of the present invention; The following are marked in the figure: 1. Connecting frame; 2. Hanging plate; 3. Fixed pin; 4. D-type locking pin; 5. Breaker attachment; 6. Bucket attachment; 7. Single hook attachment; 8. Rake attachment; 9. Machine arm pin hole; 10. Machine arm; 1-1. Connecting frame plate; 1-2. Bushing with hole; 1-3. Connecting frame pin hole; 1-4. Bushing screw hole; 1-5. Connecting frame fixed pin hole; 1-6. D-type locking pin fixed Fixed hole; 1-7, fixed shaft sleeve; 1-8, shaft sleeve without hole; 1-9, fixing screw; 2-1, hanging plate body; 2-2, hanging plate hanging ear; 2-3, hanging plate positioning groove; 2-4, hanging plate fixing pin shaft hole; 2-5, hanging plate reinforcement plate body; 2-6, bucket hanging plate; 2-7, single hook hanging plate; 2-8, rake hanging plate; 3-1, bucket arm pin shaft; 3-2, connecting rod shaft sleeve; 3-3, D-type lock pin hole. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described 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, not all of the embodiments. Therefore, the components of the embodiments of the present invention described and shown in the drawings of the embodiments of the present invention can be arranged and designed in various different configurations. All other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] It should be noted that once a number in the drawings of the embodiments of the present invention is defined in one drawing, it is not necessary to further define and explain it in the subsequent drawings; the excavator accessories referred to in the present invention refer to replaceable working equipment such as a breaker hammer accessory (5), a bucket accessory (6), a single hook accessory (7), and a rake accessory (8); the drawings of the present invention are drawn with reference to the 17-model excavator, and the size of the fixed pin shaft of a large excavator may vary.

[0018] Please refer to Figures 1 to 4 The embodiment of the present invention provides a simple excavator quick-change connection device, which comprises a connection frame (1), a hanging plate (2), and a fixed pin shaft (3); the connection frame (1) is hinged to the excavator arm (10); the hanging plate (2) is welded to the excavator attachment; the connection frame (1) and the hanging plate (2) are hung and matched, and the attachment is installed and replaced through the fixed pin shaft (3) and the D-type locking pin (4).

[0019] Specifically, the connecting frame comprises a connecting frame plate body (1-1), a shaft sleeve with a hole (1-2), a shaft sleeve without a hole (1-8), and a fixed shaft sleeve (1-7), and is hingedly connected to an excavator arm (10) via an arm pin hole (9).

[0020] Specifically, the hanging plate (2) comprises a hanging plate body (2-1) and a hanging plate reinforcement body (2-5), and the hanging plate (2) is welded to the excavator attachment.

[0021] Specifically, the fixed pin shaft (3) has the same outer diameter as the arm pin shaft (3-1) and the connecting rod pin shaft (3-2), that is, when the three pin shafts are fixed and operated using any attachment, the pin shafts are not likely to break.

[0022] Specifically, the connecting frame (1) is hingedly connected to the excavator arm (10) by means of a boom pin (3-1) and a connecting rod pin (3-2) through the connecting frame pin hole (1-3) and the arm pin hole (9), and a bushing screw hole (1-4) is provided on the bushing with a hole for fixing the boom pin (3-1) and the connecting rod pin (3-2) with a fixing screw (1-9).

[0023] Please refer to Figures 5 to 9The machine arm (10) is controlled to hinge the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at one end of the connecting frame (1) with the hanging plate hanging ear (2-2) at one end of the hanging plate (2); the machine arm (10) is controlled to make the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) in the middle of the connecting frame (1) overlap with the hanging plate positioning groove (2-3) in the middle of the hanging plate (2), that is, the connecting frame fixing pin shaft hole (1-5) overlaps with the hanging plate fixing pin shaft hole (2-4), and the fixing pin shaft (3) is inserted into the hanging plate fixing pin shaft hole (2-4) and the connecting frame fixing pin shaft hole (1-5), thereby completing the fixing structure of the three pin shafts of the excavator breaker attachment (5), thereby increasing the overall stability and safety of the simple excavator quick-change device and the attachment during operation.

[0024] Specifically, the D-shaped lock pin hole (3-3) on the fixed pin shaft (3) overlaps with the D-shaped lock pin fixing hole (1-6) on the fixed shaft sleeve (1-7), and the D-shaped lock pin (4) is inserted into the D-shaped lock pin fixing hole (1-6), thereby completing the simple installation of the excavator breaker hammer attachment (5).

[0025] Please refer to Figures 1 to 4 The shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at the upper end of the connecting frame (1) are coaxial with the arm pin hole (9) of the bucket arm pin (3-1) on the excavator arm (10); the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at the upper middle part of the connecting frame (1) are coaxial with the arm pin hole (9) of the connecting rod pin (3-2) on the arm (10); the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at the upper end of the connecting frame (1) are coaxial with the arm pin hole (9) of the connecting rod pin (3-2) on the arm (10). The connecting frame (1) is coaxial with the plate hanging ear (2-2) at one end of the hanging plate (2); the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) in the middle of the connecting frame (1) are coaxial with the plate positioning groove (2-3) in the middle of the hanging plate (2); the connecting frame fixing pin shaft hole (1-5) on the connecting frame (1) is coaxial with the hanging plate fixing pin shaft hole (2-4) on the hanging plate (2); that is, the installation hole position of the original vehicle of the attachment will not be changed, and the excavation force during the operation of the excavator will not be reduced.

[0026] Please refer to Figures 1 to 4 The connecting frame comprises: a left connecting frame plate body (1-1), a right connecting frame plate body (1-1), two shaft sleeves with holes (1-2), two shaft sleeves without holes (1-8), and a fixed shaft sleeve (1-7), which are assembled into an integral connecting frame (1) by welding. The welded connecting frame (1) shaft sleeves play a very strong protective role on the bucket arm pin shaft (3-1), the connecting rod pin shaft (3-2), and the fixed pin shaft (3); the hanging plate (2) comprises: a left hanging plate body (2-1), a right hanging plate body (2-1) and two hanging plate reinforcement bodies (2-5), which are assembled into an integral body with the excavator attachment by welding.

[0027] Please refer to Figures 10 to 12, which are reference diagrams of an embodiment of excavator accessories in which a bucket accessory (6) and a bucket hanging plate (2-6), a single hook accessory (7) and a single hook hanging plate (2-7), a rake accessory (8) and a rake hanging plate (2-8) are assembled with a connecting frame (1) and a machine arm (10).

[0028] The present invention discloses a simple excavator quick change. During the replacement operation, it is only necessary to remove the D-shaped lock pin (4) and the fixed pin shaft (3), and control the machine arm (10) to perform hanging disassembly and assembly of the connecting frame (1) and the hanging plate (2). Thus, the excavator operator can easily replace various excavator accessories (accessories equipped with hanging plates).

[0029] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any changes and substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention.

Claims

1. A simple quick-change device for an excavator, comprising a connecting frame (1), a hanging plate (2), and a fixing pin (3), characterized in that: The connecting frame (1) is hinged to the excavator arm (10); the hanging plate (2) is welded to the excavator attachment; the connecting frame (1) and the hanging plate (2) are hung together, and the attachment is installed and replaced through a fixed pin shaft (3) and a D-shaped locking pin (4).

2. A simple excavator quick-change device according to claim 1, characterized in that: The connecting frame (1) comprises a connecting frame plate body (1-1), a shaft sleeve with a hole (1-2), a shaft sleeve without a hole (1-8), and a fixed shaft sleeve (1-7), and is hinged to an excavator arm (10) via an arm pin hole (9); the hanging plate (2) comprises a hanging plate body (2-1), a hanging plate reinforcement body (2-5), and is welded to an excavator attachment; the connecting frame (1) and the hanging plate (2) are fixed via a fixed pin (3).

3. A simple excavator quick-change device according to claim 2, characterized in that: The connecting frame (1) is hingedly connected to the excavator arm (10) by means of a boom pin (3-1) and a connecting rod pin (3-2) through the connecting frame pin hole (1-3) and the arm pin hole (9), respectively; a bushing screw hole (1-4) is provided on the bushing with a hole, and cooperates with a fixing screw (1-9) to fix the boom pin (3-1) and the connecting rod pin (3-2).

4. A simple excavator quick-change device according to claim 3, characterized in that: The control arm (10) hinges the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at one end of the connecting frame (1) with the hanging plate hanging ear (2-2) at one end of the hanging plate (2). The control arm (10) makes the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) in the middle of the connecting frame (1) overlap with the hanging plate positioning groove (2-3) in the middle of the hanging plate (2), that is, the connecting frame fixing pin shaft hole (1-5) overlaps with the hanging plate fixing pin shaft hole (2-4), and the fixing pin shaft (3) is inserted into the hanging plate fixing pin shaft hole (2-4) and the connecting frame fixing pin shaft hole (1-5), thereby completing the fixing structure of the three pin shafts of the excavator attachment; the D-shaped locking pin hole (3-3) on the fixing pin shaft (3) overlaps with the D-shaped locking pin fixing hole (1-6) on the fixing shaft sleeve (1-7), and the D-shaped locking pin (4) is inserted into the D Type lock pin fixing holes (1-6) for installation of accessories.

5. The simple excavator quick-change device according to claim 4, characterized in that: The excavator attachment is installed, the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at one end of the connecting frame (1) are coaxial with the arm pin hole (9) of the bucket arm pin shaft (3-1) on the excavator arm (10), and the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at the middle part of the connecting frame (1) are coaxial with the arm pin hole (9) of the connecting rod pin shaft (3-2) on the arm (10); the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at the upper end of the connecting frame (1) are coaxial with the arm pin hole (9) of the connecting rod pin shaft (3-2) on the arm (10); The shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) are coaxial with the hanging plate hanging ear (2-2) at one end of the hanging plate (2); the shaft sleeve with holes (1-2) and the shaft sleeve without holes (1-8) at the middle part of the connecting frame (1) are coaxial with the hanging plate positioning groove (2-3) at the middle part of the hanging plate (2); the connecting frame fixing pin hole (1-5) on the connecting frame (1) is coaxial with the hanging plate fixing pin hole (2-4) on the hanging plate (2).

6. The simple excavator quick-change device according to claim 2, characterized in that: The connecting frame (1) comprises: a left connecting frame plate body (1-1), a right connecting frame plate body (1-1), two shaft sleeves with holes (1-2), two shaft sleeves without holes (1-8) and a fixed shaft sleeve (1-7), which are assembled into an integral connecting frame (1) by welding; the hanging plate (2) comprises: a left hanging plate body (2-1), a right hanging plate body (2-1) and two hanging plate reinforcement plates (2-5), which are assembled into an integral body with the excavator attachment by welding.

7. The simple excavator quick-change device according to claim 4, characterized in that: When replacing the excavator attachment, it is only necessary to remove the D-shaped locking pin (4) and the fixing pin shaft (3), and control the machine arm (10) to perform hanging disassembly and assembly of the connecting frame (1) and the hanging plate (2) to replace the attachment.

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