Excavator and unloading accessory thereof

Abstract

The invention discloses an excavator and a lower vehicle accessory thereof in the technical field of excavators, and aims to solve the problems of low excavation efficiency and muck leakage of a bucket in the prior art. A ripping knife or a soil throwing plate can be respectively mounted on the first rotating shaft, when a hard soil layer is encountered under the excavation working condition, the ripping knife is mounted on the first rotating shaft, the ripping operation is firstly carried out, the hard soil layer is ripped into fragments, and then the excavation operation is carried out; when loose muck is encountered in the loading working condition, the soil throwing plate is installed on the first rotating shaft, the loose muck can be scattered to the position close to the chassis in the loading process, soil throwing operation can be conducted firstly, and the muck is thrown to the position in front of the excavator and easy to reach by a bucket; the variable-speed driving device and the lifting device are used for applying a proper rotating speed and a proper depth to the ground when the first rotating shaft is provided with the ripping knife or the soil throwing plate. The variable-speed driving device rotates slowly in the forward direction and retracts inwards on the ground to cut a soil layer; under the working condition of loading loose muck, the soil throwing plate is pushed outwards on the ground to throw the muck forwards.

Description

Technical Field

[0001] The invention relates to an excavator and an undercarriage attachment thereof, belonging to the technical field of excavators. Background Art

[0002] Existing excavator undercarriage attachments are generally only arranged with a bulldozer, which can collect loose debris, but requires getting off the vehicle and walking to push it, which is inefficient; for hard soil layers, when the bucket cannot dig, the bulldozer cannot play an auxiliary role. Summary of the invention

[0003] The purpose of the present application is to overcome the deficiencies in the prior art and to provide an off-vehicle attachment that, when loading loose debris, can throw the debris scattered in front of the excavator chassis forward, making it easy for the bucket to reach it; when encountering hard soil layers to be excavated, the soil can be split first, the hard soil layers can be broken into pieces, and then excavation can be carried out, which can significantly improve efficiency.

[0004] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions: In a first aspect, the present application provides an excavator undercarriage attachment, comprising: The vehicle attachment body comprises a first frame and a first rotating shaft rotatably connected to the first frame, one or more first mounting seats are arranged on the first rotating shaft, and a soil splitter and a soil throwing plate can be detachably connected to the first mounting seats respectively; A variable speed drive device, connected to the first rotating shaft for torque transmission; A lifting device, wherein the first frame is installed on the chassis through the lifting device, and the lifting device is used to control the distance between the body of the vehicle-mounted attachment and the ground.

[0005] In some embodiments of the first aspect, the first frame is rotatably connected to the chassis; The lifting device includes a first telescopic component, both ends of which are rotatably connected to the first frame and the chassis respectively. The first telescopic component is used to drive the first frame and the chassis to rotate, thereby controlling the distance between the disembarkation attachment body and the ground.

[0006] In some embodiments of the first aspect, the chassis includes a first support and a second support, the first support is provided with a first hinge hole, the second support is provided with a second hinge hole, the second hinge hole is spaced a set distance from the first hinge hole and the first hinge hole is closer to the ground than the second hinge hole; The first frame is rotatably connected to the first support through the first hinge hole, and the first telescopic component is rotatably connected to the second support through the second hinge hole.

[0007] In some embodiments of the first aspect, the undercarriage attachment body also includes a soil retaining cover, which is installed on the first frame, and the inner wall of the soil retaining cover matches the rotation trajectory of the soil splitting knife or the soil throwing plate, and the soil retaining cover has an opening toward the bucket to control the ejection direction of the debris in the soil retaining cover.

[0008] In some embodiments of the first aspect, the variable speed drive device includes a two-speed hydraulic motor and a transmission box connected to the two-speed hydraulic motor, the transmission box includes an upper transmission box cover and a lower transmission box cover that are connected to each other, the two ends of the transmission box are respectively connected to a first end cover and a second end cover, and the first gear shaft is rotatably connected to the first end cover and the second end cover respectively; the first gear shaft is torsionally connected to the output shaft of the two-speed hydraulic motor, and the first gear shaft passes through the first end cover and is torsionally connected to the first rotating shaft.

[0009] In some embodiments of the first aspect, the speed change drive device also includes a thrust bearing connected to the inner wall of the transmission box upper cover and the transmission box lower cover, and a retaining spring is sleeved on the position of the first gear shaft corresponding to the thrust bearing, and the retaining spring and the thrust bearing are used to limit the axial displacement of the first gear shaft.

[0010] In some embodiments of the first aspect, the first end cover is connected to the first frame support by a plurality of third bolts; The first gear shaft is a spline shaft, and one end of the first rotating shaft close to the first gear shaft is provided with a spline connected to the first gear shaft for torque transmission.

[0011] In some embodiments of the first aspect, the first mounting seat is provided with a mounting position for connecting with the soil ripping knife or the soil throwing plate, and the plurality of the first mounting seats are respectively divided into a first group and a second group, the mounting positions in the first group are arranged on the first mounting seat along a first direction, and the mounting positions in the second group are arranged on the first mounting seat along a second direction, the first direction is perpendicular to the second direction, and the first mounting seats of the first group and the first mounting seats of the second group are alternately arranged on the first rotating shaft.

[0012] In some embodiments of the first aspect, the mounting position is provided with a third bolt hole; The ripping knife comprises a blade and a first fixing seat connected to the blade, wherein the first fixing seat is provided with a second bolt hole matching the third bolt hole; The earth-throwing blade includes a scraper and a second fixing seat connected to the scraper, and the second fixing seat is provided with a second bolt hole matching the third bolt hole.

[0013] In a second aspect, the present application further provides an excavator, characterized in that it comprises a bucket and the excavator undercarriage attachment provided by any one of the embodiments of the first aspect, wherein the excavator undercarriage attachment is installed in front of a chassis.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The excavator and its off-vehicle attachment provided by the present application can be respectively installed with a splitter or a soil-throwing plate on the first rotating shaft. When the excavation condition encounters a hard soil layer, the splitter is installed on the first rotating shaft, and the soil splitting operation is first performed to split the hard soil layer into fragments, and then the excavation operation is performed; when the loading condition encounters loose slag, the soil-throwing plate is installed on the first rotating shaft. During loading, the loose slag will be scattered to a position close to the chassis, and the soil-throwing operation can be performed first to throw the slag to the front of the excavator, where the bucket can easily reach. The variable speed drive device and the lifting device are used to apply a suitable rotation speed and depth to the ground when the splitter or the soil-throwing plate is installed on the first rotating shaft respectively. When excavating and splitting, the lifting device is adjusted to a suitable depth, the variable speed drive device rotates slowly in the forward direction, and the splitter is retracted on the ground to cut the soil layer; when loading loose slag, the lifting device is adjusted to a suitable height, the variable speed drive device rotates rapidly in the reverse direction, and the soil-throwing plate is pushed outward on the ground to throw the slag forward. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present application or 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 some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 is a structural schematic diagram of an excavator provided in this embodiment; Figure 2 It is a schematic diagram of the structure of the excavator undercarriage attachment provided by this embodiment installed on the chassis; Figure 3 yes Figure 2 A schematic diagram of the structure of the mid-chassis and its accessory structures; Figure 4 It is a structural schematic diagram of the first telescopic component in the excavator undercarriage attachment provided in this embodiment; Figure 5 It is a structural schematic diagram of the first mounting seat of the excavator undercarriage attachment provided in this embodiment to install the ripping knife; Figure 6 It is a schematic structural diagram of a speed-changing drive device in an excavator undercarriage attachment provided in this embodiment; Figure 7 It is a schematic diagram of the structure of a soil splitter in an excavator undercarriage attachment provided in this embodiment; Figure 8 It is a structural schematic diagram of a soil-throwing plate in an excavator undercarriage attachment provided in this embodiment; Fig. 9 It is a structural schematic diagram of the first mounting seat in the excavator undercarriage attachment provided in this embodiment to install the earth-throwing plate; In the figure: 1, chassis; 1-1, reinforcement plate; 1-2, first support; 1-2-1, first hinge hole; 1-3, second support; 1-3-1, second hinge hole; 1-4, X-shaped frame; 2, first telescopic component; 2-1, first hinge shaft; 2-2, first telescopic cylinder; 2-3, second fixed pin shaft; 2-4, first fixed pin shaft; 2-5, second hinge shaft; 3, body of the vehicle attachment; 3.1, first rotating shaft; 3.2, first frame; 3.3, first mounting seat; 3.4, ripper; 3.4.1, blade; 3.4.2, first Fixed seat; 3.5, earth-throwing plate; 3.5.1, scraper; 3.5.2, second fixed seat; 3.6, third mounting seat; 3.7, fourth mounting seat; 3.8, earth retaining cover; 3.9, spline; 3.10, mounting position; 3.11, third end cover; 4, variable speed drive device; 4.1, two-speed hydraulic motor; 4.6, first gear shaft; 4.7, transmission box upper cover; 4.8, transmission box lower cover; 4.5, first end cover; 4.14, second end cover; 4.13, thrust bearing; 4.10, retaining ring; 4.2, third bolt; 5, bucket. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of this application / this application to clearly and completely describe the technical solutions in the embodiments of this application / this application. Obviously, the described embodiments are only part of the embodiments of this application / this application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the application / this application and its application or use. Embodiment 1

[0018] This embodiment provides an excavator undercarriage attachment to solve the problem in the prior art that the undercarriage attachment is insufficient for excavating hard soil layers.

[0019] refer to Figures 1 to 9 The excavator dismounting attachment provided in this embodiment includes: a dismounting attachment body 3, including a first frame 3.2 and a first rotating shaft 3.1 rotatably connected to the first frame 3.2, one or more first mounting seats 3.3 are arranged on the first rotating shaft 3.1, and a ripping blade 3.4 and a throwing plate 3.5 can be detachably connected to the first mounting seats 3.3 respectively; A variable speed drive device 4 is connected to the first rotating shaft 3.1 for torque transmission; Lifting device: the first frame 3.2 is installed on the chassis 1 through the lifting device, and the lifting device is used to control the distance between the vehicle attachment body 3 and the ground.

[0020] The non-exclusive method of use is as follows: the soil-ripping knife 3.4 is mounted on the first mounting seat 3.3, and the lifting device controls the height of the first frame 3.2 until the soil-ripping knife 3.4 is inserted into the ground at an appropriate depth; the variable speed drive device 4 drives the first rotating shaft 3.1 to rotate at a first rotation speed that is most suitable for soil-ripping, and the soil-ripping knife 3.4 starts to rip the soil, and at the same time, the lifting device controls and drives the soil-ripping knife 3.4 to gradually penetrate into the ground; after the lifting stroke of the lifting device reaches a threshold or the variable speed drive device 4 is overloaded, the first rotating shaft 3.1 stops rotating, and the lifting device brings the soil-ripping knife 3.4 out of the ground; the earth-throwing plate 3.5 is mounted on the first mounting seat 3.3, and the lifting device controls the height of the first frame 3.2 until the earth-throwing plate 3.5 is inserted into the ground at an appropriate depth; the variable speed drive device 4 drives the first rotating shaft 3.1 to rotate at a second rotation speed that is most suitable for earth-throwing, and the earth-throwing plate 3.5 throws out the debris to form a pile of soil that is easy for the bucket 5 to shovel away. As one embodiment, the variable speed drive device 4 can make the first rotating shaft 3.1 be at the optimal soil ripping / shoveling depth when the lifting device is at different strokes according to a set algorithm.

[0021] In summary, the excavator undercarriage attachment provided in this embodiment can be equipped with a splitter 3.4 or a soil-slinging plate 3.5 on the first rotating shaft 3.1. When the excavation condition encounters a hard soil layer, the splitter 3.4 is installed on the first rotating shaft, and the soil splitting operation is first performed to split the hard soil layer into pieces, and then the excavation operation is performed; when the loading condition encounters loose slag, the soil-slinging plate 3.5 is installed on the first rotating shaft 3.1. During loading, the loose slag will be scattered to a position close to the chassis 1, and the soil-slinging operation can be performed first to throw the slag to the front of the excavator, where the bucket 5 can easily reach. The variable speed drive device 4 and the lifting device are used to apply a suitable rotation speed and depth into the ground when the splitter 3.4 or the soil-slinging plate 3.5 is installed on the first rotating shaft 3.1. When digging and splitting, the lifting device is adjusted to a suitable depth, the variable speed drive device 4 rotates slowly in the forward direction, and the splitter 3.4 retracts on the ground to cut the soil layer; when loading loose soil, the lifting device is adjusted to a suitable height, the variable speed drive device 4 rotates rapidly in the reverse direction, and the soil throwing plate 3.5 pushes outward on the ground to throw the soil forward. The variable speed drive device 4 and the lifting device are used to apply the most suitable rotation speed and depth into the ground when installing the ripping knife 3.4 or the earth-throwing plate 3.5 on the first rotating shaft 3.1 respectively. The speed of the variable speed drive device 4 is adjusted to make the first rotating shaft 3.1 at the optimal rotation speed at different depths, thereby improving the efficiency of processing hard soil layers. In addition, the ripping knife 3.4 can cooperate with the bucket 5 of the excavator. After the ripping knife 3.4 has cracked the hard soil layer, the bucket 5 can easily shovel it away. During loading operations, part of the debris will be thrown to a position close to the chassis 1 during the shoveling process of the bucket 5, and the dumping plate 3.5 can throw the debris back to the vicinity of the bucket 5, thereby improving the working efficiency of the bucket 5. The rotation speed of the first rotating shaft 3.1 can be different when using the ripping knife 3.4 and the dumping plate 3.5 respectively. For example, when the first rotating shaft 3.1 is installed with the ripping knife 3.4, the rotation speed of the first rotating shaft 3.1 can be reduced to ensure the ripping effect. When the first rotating shaft 3.1 is installed with the dumping plate 3.5, the rotation speed can be increased, and the rotation direction is opposite to that when the ripping knife 3.4 is installed on the first rotating shaft 3.1. The dumping plate 3.5 throws the debris to the bucket 5 at high speed.

[0022] As one embodiment, the excavator's undercarriage attachment bucket 5 can also work on coal, sand, ore, etc. Embodiment 2

[0023] This embodiment provides an excavator dismounting attachment. This embodiment is optimized on the basis of the first embodiment to improve the technical effect and refine the technical solution. For the contents not fully described in this embodiment, please refer to the first embodiment.

[0024] As one example, refer to Figure 2 , Figure 3 and Figure 4 , the first frame 3.2 is rotatably connected to the chassis 1; the lifting device includes a first telescopic component 2, both ends of the first telescopic component 2 are rotatably connected to the first frame 3.2 and the chassis 1, and the first telescopic component 2 is used to drive the first frame 3.2 and the chassis 1 to rotate, thereby controlling the distance between the dismounting attachment body 3 and the ground. The first frame 3.2 is connected to the chassis 1 at two locations, firstly, it is rotatably connected to the chassis 1, and the other location is connected to the chassis 1 by the first telescopic component 2. The first telescopic component 2 can control the angle of the first frame 3.2 around the chassis 1 through telescopic movement, thereby controlling the height of the first frame 3.2 and the depth of the ripping blade 3.4 and the earth-throwing plate 3.5 into the ground.

[0025] As one embodiment, the chassis 1 includes a first support 1-2 and a second support 1-3, the first support 1-2 is provided with a first hinge hole 1-2-1, the second support 1-3 is provided with a second hinge hole 1-3-1, the second hinge hole 1-3-1 is spaced from the first hinge hole 1-2-1 by a set distance and the first hinge hole 1-2-1 is closer to the ground than the second hinge hole 1-3-1; the third mounting seat 3.6 on the first frame 3.2 is rotatably connected to the first support 1-2 through the first hinge hole 1-2-1, and the first telescopic component 2 is rotatably connected to the fourth mounting seat 3.7 on the second support 1-3 through the second hinge hole 1-3-1. The deadweight of the dismounting attachment body 3 is transferred to the chassis 1 through the first hinge hole 1-2-1 closer to the ground, thereby reducing the deadweight load on the first telescopic component 2.

[0026] As one embodiment, the first support 1-2 and the second support 1-3 are reinforced and fixed on the X-shaped frame 1-4 of the chassis 1 through the reinforcing plate 1-1.

[0027] As one example, refer to Figure 1 and Figure 5 The body of the off-vehicle attachment also includes a soil retaining cover 3.8, which is installed on the first frame 3.2. The inner wall of the soil retaining cover 3.8 matches the rotation trajectory of the soil splitting knife 3.4 or the soil throwing plate 3.5. The soil retaining cover 3.8 is opened toward the bucket 5 to control the ejection direction of the slag in the soil retaining cover 3.8. When in use, the soil splitting knife 3.4 or the soil throwing plate 3.5 brings the slag upward. When the slag in the soil retaining cover 3.8 is thrown out by the soil splitting knife 3.4 or the soil throwing plate 3.5, the slag hits the soil retaining cover 3.8 and rebounds. The soil retaining cover 3.8 can prevent the disorderly splashing of the slag. Only when the direction of throwing out the slag is toward the opening of the soil retaining cover 3.8, the slag can be thrown out and form a pile near the bucket 5.

[0028] As one example, refer to Figure 6 The speed-changing drive device 4 comprises a two-speed hydraulic motor 4.1 and a transmission box connected to the two-speed hydraulic motor 4.1, the transmission box comprises a transmission box upper cover 4.7 and a transmission box lower cover 4.8 which can be connected to each other, the two ends of the transmission box are respectively connected to a first end cover 4.5 and a second end cover 4.14, the first gear shaft 4.6 is respectively rotatably connected to the first end cover 4.5 and the second end cover 4.14; the first gear shaft 4.6 is connected to the output shaft of the two-speed hydraulic motor 4.1 for torque transmission, the first gear shaft 4.6 passes through the first end cover 4.5 and is connected to the first rotating shaft 3.1 for torque transmission.

[0029] Considering that debris is easy to enter the transmission box, the two ends of the transmission box are divided into a first end cover 4.5 and a second end cover 4.14 that can be connected to each other, which can improve the maintenance efficiency of the transmission box. Compared with the electric motor, the two-speed hydraulic motor 4.1 has a speed change function and a rotation drive mechanism based on the hydraulic principle that is more reliable than the electric motor.

[0030] As one embodiment, the speed drive device 4 also includes a thrust bearing 4.13 connected to the inner wall of the transmission box upper cover 4.7 and the transmission box lower cover 4.8, and a retaining spring 4.10 is sleeved on the position of the first gear shaft 4.6 corresponding to the thrust bearing 4.13. The retaining spring 4.10 and the thrust bearing 4.13 are used to limit the axial displacement of the first gear shaft 4.6.

[0031] When the ripping blade 3.4 and the earth-throwing plate 3.5 process hard soil layers, the hard soil layers will generate reverse vibrations, and the first gear shaft 4.6 tends to shake along the axial direction. However, in this embodiment, the circlip 4.10 and the thrust bearing 4.13 are used to avoid the shaking of the first gear shaft 4.6 along the axial direction.

[0032] As one embodiment, the first end cover 4.5 is supported and connected to the first frame 3.2 by multiple third bolts 4.2; the first gear shaft 4.6 is a spline shaft, and the end of the first rotating shaft 3.1 close to the first gear shaft 4.6 is provided with a spline 3.9 connected to the first gear shaft 4.6 for torque transmission.

[0033] In this embodiment, the first gear shaft 4.6 and the first rotating shaft 3.1 are directly connected through the spline 3.9, and the speed change driving device 4 is fixed to the first frame 3.2 through the third bolt 4.2, so as to minimize the influence of shaking on the transmission process.

[0034] As one example, refer to Figure 5 and Fig. 9 The first mounting seat 3.3 is provided with a mounting position 3.10 for connecting with the ripping knife 3.4 or the earth-throwing plate 3.5. The plurality of first mounting seats 3.3 are respectively divided into a first group and a second group. The mounting positions 3.10 in the first group are arranged on the first mounting seat 3.3 along a first direction, and the mounting positions 3.10 in the second group are arranged on the first mounting seat 3.3 along a second direction. The first direction is perpendicular to the second direction, and the first mounting seats 3.3 of the first group and the first mounting seats 3.3 of the second group are alternately arranged on the first rotating shaft 3.1.

[0035] First, the first and second groups of first mounting seats 3.3 are arranged alternately, so that the first rotating shaft 3.1 has at least multiple opportunities for the ripping blade 3.4 and the earth-throwing plate 3.5 to contact the ground in a single rotation cycle, and the reaction force of the ground acts on the first and second groups of first mounting seats 3.3 respectively, reducing the impact on the single first mounting seat 3.3. Since the ripping blade 3.4 and the earth-throwing plate 3.5 have at least multiple opportunities to contact the ground in a single rotation cycle, the torque requirement of the variable speed drive device 4 can be relaxed. Under the premise of processing the same hard ground depth, increasing the number of times the ground is contacted in a single rotation cycle can reduce the impact on the entire excavator's off-vehicle attachment every time it contacts the ground, and the first direction is perpendicular to the second direction to ensure that the impact interval period is the same. As one embodiment, the two ends of the first rotating shaft 3.1 are rotatably connected to the third end cover 3.11, and the third end cover 3.11 is installed on the first frame 3.2.

[0036] As one example, refer to Figure 7 and Figure 8 , the mounting position 3.10 is provided with a third bolt hole; the ripping knife 3.4 includes a blade 3.4.1 and a first fixing seat 3.4.2 connected to the blade 3.4.1, and the first fixing seat 3.4.2 has a second bolt hole matching the third bolt hole; the earth-throwing plate 3.5 includes a scraper 3.5.1 and a second fixing seat 3.5.2 connected to the scraper 3.5.1, and the second fixing seat 3.5.2 has a second bolt hole matching the third bolt hole, and the third bolt hole and the second bolt hole are connected at the same time by a fourth bolt to realize the installation of the ripping knife 3.4 and the earth-throwing plate 3.5.

[0037] As one example, refer to Figure 4 The first telescopic component 2 includes a first telescopic cylinder 2-2, and both ends of the first telescopic cylinder are rotatably connected to the first hinge shaft 2-1 and the second hinge shaft 2-5 respectively. The first hinge shaft 2-1 and the second hinge shaft 2-5 are respectively used to connect the fourth mounting seat 3.7 and the second hinge hole 1-3-1. A first fixed pin is provided on the first hinge shaft 2-1, and a second fixed pin 2-3 is provided on the second hinge shaft 2-5. The fourth mounting seat 3.7 and the second hinge hole 1-3-1 are respectively provided with holes matching the first fixed pin and the second fixed pin 2-3, and the connection of the first telescopic cylinder 2-2 is achieved by inserting the pins into the holes.

[0038] The excavator undercarriage attachment provided in this embodiment improves the processing efficiency and reduces the impact caused by the reaction vibration. Embodiment 3

[0039] This embodiment provides an excavator, referring to Figure 1, including a bucket 5 and the excavator attachment provided in Embodiment 1 or 2, the excavator attachment is installed in front of the chassis 1 near the bucket 5. When in use, when excavating hard soil layers, first crack the soil, then dig, and the digging efficiency of the bucket is significantly improved. At the same time, the excavator provided in this embodiment has the same technical effects as Embodiment 1 or 2, which will not be repeated here. When loading loose objects, first perform a soil throwing operation to throw the pile of slag scattered in front of the chassis from top to bottom to a position that the bucket 5 can handle.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "provided at", "provided with", "located", "installed", "set", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. "Hinged" includes "rotational connection".

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An excavator undercarriage attachment, characterized in that: include, The vehicle attachment body (3) comprises a first frame (3.2) and a first rotating shaft (3.1) rotatably connected to the first frame (3.2); one or more first mounting seats (3.3) are provided on the first rotating shaft (3.1); and a soil splitter (3.4) and a soil throwing plate (3.5) can be detachably connected to the first mounting seats (3.3) respectively; A variable speed drive device (4) connected to the first rotating shaft (3.1) for torque transmission; A lifting device, wherein the first frame (3.2) is mounted on the chassis (1) via the lifting device, and the lifting device is used to control the distance between the body of the disembarkation attachment (3) and the ground.

2. The excavator undercarriage attachment according to claim 1, characterized in that: The first frame (3.2) is rotatably connected to the chassis (1); The lifting device comprises a first telescopic component (2), two ends of the first telescopic component (2) are respectively rotatably connected to the first frame (3.2) and the chassis (1), and the first telescopic component (2) is used to drive the first frame (3.2) and the chassis (1) to rotate, thereby controlling the distance between the dismounting attachment body and the ground.

3. The excavator undercarriage attachment according to claim 2, characterized in that: The chassis (1) comprises a first support (1-2) and a second support (1-3), the first support (1-2) being provided with a first hinge hole (1-2-1), the second support (1-3) being provided with a second hinge hole (1-3-1), the second hinge hole (1-3-1) being spaced a set distance from the first hinge hole (1-2-1) and the first hinge hole (1-2-1) being closer to the ground than the second hinge hole (1-3-1); The first frame (3.2) is rotatably connected to the first support (1-2) via the first hinge hole (1-2-1), and the first telescopic component (2) is rotatably connected to the second support (1-3) via the second hinge hole (1-3-1).

4. The excavator undercarriage attachment according to claim 1, characterized in that: The off-vehicle attachment body further comprises a soil retaining cover (3.8), the soil retaining cover (3.8) being mounted on the first frame (3.2), the inner wall of the soil retaining cover (3.8) matching the rotation trajectory of the soil splitting knife (3.4) or the soil throwing plate (3.5), and the soil retaining cover (3.8) being provided with an opening facing the bucket (5) so as to control the ejection direction of the slag in the soil retaining cover (3.8).

5. The excavator undercarriage attachment according to claim 1, characterized in that: The variable speed drive device (4) comprises a two-speed hydraulic motor (4.1) and a transmission box connected to the two-speed hydraulic motor (4.1); the transmission box comprises a transmission box upper cover (4.7) and a transmission box lower cover (4.8) connected to each other; two ends of the transmission box are respectively connected to a first end cover (4.5) and a second end cover (4.14); a first gear shaft (4.6) is respectively rotatably connected to the first end cover (4.5) and the second end cover (4.14); the first gear shaft (4.6) is torque-transmittingly connected to an output shaft of the two-speed hydraulic motor (4.1); the first gear shaft (4.6) passes through the first end cover (4.5) and is torque-transmittingly connected to the first rotating shaft (3.1).

6. The excavator undercarriage attachment according to claim 5, characterized in that: The variable speed drive device (4) further comprises a thrust bearing (4.13) connected to the inner walls of the transmission box upper cover (4.7) and the transmission box lower cover (4.8); a retaining spring (4.10) is sleeved on the first gear shaft (4.6) at a position corresponding to the thrust bearing (4.13); the retaining spring (4.10) and the thrust bearing (4.13) are used to limit the axial displacement of the first gear shaft (4.6).

7. The excavator undercarriage attachment according to claim 6, characterized in that: The first end cover (4.5) is supported and connected to the first frame (3.2) via a plurality of third bolts (4.2); The first gear shaft (4.6) is a spline shaft, and one end of the first rotating shaft (3.1) close to the first gear shaft (4.6) is provided with a spline (3.9) connected to the first gear shaft (4.6) for torque transmission.

8. The excavator undercarriage attachment according to claim 1, characterized in that: The first mounting seat (3.3) is provided with a mounting position (3.10) for connecting to the soil ripping knife (3.4) or the soil throwing plate (3.5), and the plurality of first mounting seats (3.3) are respectively divided into a first group and a second group, the mounting positions (3.10) in the first group are arranged on the first mounting seat (3.3) along a first direction, and the mounting positions (3.10) in the second group are arranged on the first mounting seat (3.3) along a second direction, the first direction and the second direction are perpendicular to each other, and the first mounting seats (3.3) of the first group and the first mounting seats (3.3) of the second group are alternately arranged on the first rotating shaft (3.1).

9. The excavator undercarriage attachment according to claim 8, characterized in that: The mounting position (3.10) is provided with a third bolt hole; The ripping knife (3.4) comprises a blade (3.4.1) and a first fixing seat (3.4.2) connected to the blade (3.4.1), the first fixing seat (3.4.2) being provided with a second bolt hole matching the third bolt hole; The earth-throwing plate (3.5) comprises a scraper (3.5.1) and a second fixing seat (3.5.2) connected to the scraper (3.5.1), and the second fixing seat (3.5.2) is provided with a second bolt hole matching the third bolt hole.

10. An excavator, characterized in that: It comprises a bucket (5) and an excavator undercarriage attachment provided in any one of claims 1 to 9, wherein the excavator undercarriage attachment is installed on a side of a chassis (1) close to the bucket (5).

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