An excavator and its undercarriage attachment

Abstract

This invention discloses an excavator and its undercarriage attachment in the field of excavator technology, aiming to solve the problems of low excavation efficiency and leakage of excavated soil in the bucket in the prior art. A soil-splitting blade or a soil-throwing plate can be installed on the first rotating shaft. When encountering hard soil layers during excavation, the soil-splitting blade is installed on the first rotating shaft to first split the hard soil layer into fragments before excavation. When encountering loose excavated soil during loading, the soil-throwing plate is installed on the first rotating shaft. During loading, the loose excavated soil will scatter near the chassis, allowing for soil-throwing to be thrown forward to a position easily reachable by the bucket. A transmission drive and a lifting device are used to apply appropriate rotation speed and ground penetration depth when the soil-splitting blade or soil-throwing plate is installed on the first rotating shaft, respectively. The transmission drive rotates slowly in the forward direction, cutting the soil layer inward; when loading loose excavated soil, the soil-throwing plate pushes outward on the ground, throwing the excavated soil forward.

Description

Technical Field

[0001] This invention relates to an excavator and its undercarriage attachment, belonging to the field of excavator technology. Background Technology

[0002] Existing excavator attachments typically only include a bulldozer blade. While the bulldozer blade can collect loose debris, it requires the excavator to walk and push, resulting in low efficiency. For hard soil layers, the bulldozer blade does not provide any assistance when the bucket cannot dig. Summary of the Invention

[0003] The purpose of this application is to overcome the shortcomings of the prior art and provide an off-truck attachment that can throw the loose excavator chassis in front of the excavator forward when loading loose excavated soil, making it easy for the bucket to reach; when encountering hard soil layers, it can first perform soil cracking operations to break the hard soil layer into fragments before excavation, which can significantly improve efficiency.

[0004] To achieve the above objectives, this application employs the following technical solution:

[0005] Firstly, this application provides an excavator unloading attachment, including...

[0006] The off-vehicle attachment body includes a first frame and a first rotating shaft rotatably connected to the first frame. One or more first mounting seats are provided on the first rotating shaft. The soil splitting blade and the soil throwing plate can be detachably connected to the first mounting seats respectively.

[0007] The speed-changing drive device is connected to the first rotating shaft for torque transmission;

[0008] A lifting device is provided, wherein the first frame is mounted on the chassis via the lifting device, and the lifting device is used to control the distance between the dismount attachment body and the ground.

[0009] In some embodiments of the first aspect, the first frame is rotatably connected to the chassis;

[0010] The lifting device includes a first telescopic component, the two 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 dismount attachment body and the ground.

[0011] In some embodiments of the first aspect, the chassis includes a first support and a second support, the first support having a first hinge hole, the second support having a second hinge hole, the second hinge hole being spaced apart from the first hinge hole by a predetermined distance, and the first hinge hole being closer to the ground than the second hinge hole.

[0012] 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.

[0013] In some embodiments of the first aspect, the unloading attachment body further includes a soil retainer, the soil retainer being installed on the first frame, the inner wall of the soil retainer being matched with the rotation trajectory of the soil splitter or the soil throwing plate, and the soil retainer having an opening facing the bucket to control the throwing direction of the excavated soil inside the soil retainer.

[0014] In some embodiments of the first aspect, the variable speed drive device includes a dual-speed hydraulic motor and a transmission box connected to the dual-speed hydraulic motor. The transmission box includes an upper transmission box cover and a lower transmission box cover connected to each other. A first end cover and a second end cover are respectively connected to both ends of the transmission box. A first gear shaft is rotatably connected to the first end cover and the second end cover respectively. The first gear shaft is torque-transmittingly connected to the output shaft of the dual-speed hydraulic motor. The first gear shaft extends out from the first end cover and is torque-transmittingly connected to the first rotating shaft.

[0015] In some embodiments of the first aspect, the transmission drive device further includes a thrust bearing connected to the inner wall of the transmission housing upper cover and the transmission housing lower cover, and a retaining ring is sleeved on the first gear shaft corresponding to the position of the thrust bearing. The retaining ring and the thrust bearing are used to limit the axial displacement of the first gear shaft.

[0016] In some embodiments of the first aspect, the first end cap is supportedly connected to the first frame body by a plurality of third bolts;

[0017] The first gear shaft is a splined shaft, and the end of the first rotating shaft near the first gear shaft is provided with a spline that is connected to the first gear shaft for torque transmission.

[0018] In some embodiments of the first aspect, the first mounting base is provided with mounting positions for connecting to the soil splitting blade or the soil-throwing plate. The plurality of first mounting bases are respectively divided into a first group and a second group. The mounting positions in the first group are arranged on the first mounting base along a first direction, and the mounting positions in the second group are arranged on the first mounting base along a second direction. The first direction and the second direction are perpendicular to each other, and the first mounting bases of the first group and the first mounting bases of the second group are alternately arranged on the first rotating shaft.

[0019] In some embodiments of the first aspect, the mounting position is provided with a third bolt hole;

[0020] The soil splitter includes a blade and a first fixing seat connected to the blade, wherein the first fixing seat has a second bolt hole that matches the third bolt hole;

[0021] The soil-throwing plate includes a scraper and a second fixing seat connected to the scraper, wherein the second fixing seat has a second bolt hole that matches the third bolt hole.

[0022] Secondly, this application also provides an excavator, characterized in that it includes a bucket and an excavator undercarriage attachment provided in any embodiment of the first aspect, the excavator undercarriage attachment being mounted in front of the chassis.

[0023] Compared with the prior art, the beneficial effects achieved by this application are as follows:

[0024] The excavator and its undercarriage attachments provided in this application can be equipped with either a soil-splitting blade or a soil-throwing plate on the first shaft. When encountering hard soil during excavation, the soil-splitting blade is installed on the first shaft to first split the soil into smaller pieces before excavation. When encountering loose debris during loading, the soil-throwing plate is installed on the first shaft. During loading, the loose debris will scatter near the chassis, allowing for soil-throwing to be thrown forward to a position easily reachable by the bucket. The transmission drive and lifting device are used to apply appropriate rotation speed and ground penetration depth when the soil-splitting blade or soil-throwing plate is installed on the first shaft, respectively. During excavation and soil-splitting operations, the lifting device is adjusted to a suitable depth, and the transmission drive rotates slowly in the forward direction, causing the soil-splitting blade to retract and cut the soil layer. During loading loose debris operations, the lifting device is adjusted to a suitable height, and the transmission drive rotates rapidly in the reverse direction, causing the soil-throwing plate to push the debris forward. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural schematic diagram of the excavator provided in this embodiment;

[0027] Figure 2 This is a schematic diagram of the structure of the excavator undercarriage attachment installed on the chassis provided in this embodiment;

[0028] Figure 3 yes Figure 2 Structural diagram of the mid-chassis and its ancillary structures;

[0029] Figure 4 This is a schematic diagram of the structure of the first telescopic component in the excavator undercarriage attachment provided in this embodiment;

[0030] Figure 5This is a schematic diagram of the structure of the first mounting seat for installing the soil-splitting blade in the excavator undercarriage attachment provided in this embodiment;

[0031] Figure 6 This is a schematic diagram of the transmission drive device in the excavator undercarriage attachment provided in this embodiment;

[0032] Figure 7 This is a schematic diagram of the structure of the soil splitting blade in the excavator undercarriage attachment provided in this embodiment;

[0033] Figure 8 This is a schematic diagram of the structure of the soil-throwing plate in the excavator undercarriage attachment provided in this embodiment;

[0034] Figure 9 This is a schematic diagram of the structure of the first mounting seat for installing the soil-throwing plate in the excavator undercarriage attachment provided in this embodiment;

[0035] In the diagram: 1. Chassis; 1-1. Reinforcing plate; 1-2. First support; 1-2-1. First hinge hole; 1-3. Second support; 1-3-1. Second hinge hole; 1-4. X-frame; 2. First telescopic component; 2-1. First hinge shaft; 2-2. First telescopic cylinder; 2-3. Second fixing pin; 2-4. First fixing pin; 2-5. Second hinge shaft; 3. Undercarriage attachment body; 3.1. First rotating shaft; 3.2. First frame; 3.3. First mounting base; 3.4. Soil splitter; 3.4.1. Blade; 3.4.2. First... 3.5 Fixed seat; 3.5 Spread plate; 3.5.1 Scraper; 3.5.2 Second fixed seat; 3.6 Third mounting seat; 3.7 Fourth mounting seat; 3.8 Soil retaining cover; 3.9 Spline; 3.10 Mounting position; 3.11 Third end cover; 4. Variable speed drive device; 4.1 Dual-speed hydraulic motor; 4.6 First gear shaft; 4.7 Upper cover of transmission box; 4.8 Lower cover of transmission box; 4.5 First end cover; 4.14 Second end cover; 4.13 Thrust bearing; 4.10 Snap ring; 4.2 Third bolt; 5. Bucket. Detailed Implementation

[0036] The technical solutions of this application / the embodiments thereof will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application / the embodiments thereof, and not all embodiments thereof. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application / the application thereof or its application or use. Example 1

[0037] This embodiment provides an excavator undercarriage attachment to address the problem in the prior art where undercarriage attachments lack the capability to handle excavation in hard soil layers.

[0038] refer to Figures 1 to 9 The excavator off-road attachment provided in this embodiment includes an off-road attachment body 3, which includes 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. The soil splitter 3.4 and the soil-throwing plate 3.5 can be detachably connected to the first mounting seat 3.3 respectively.

[0039] The speed-changing drive device 4 is connected to the first rotating shaft 3.1 for torque transmission;

[0040] The lifting device is used to control the distance between the lower attachment body 3 and the ground. The first frame 3.2 is installed on the chassis 1 via the lifting device.

[0041] Non-unique usage method: Install the soil splitting blade 3.4 on the first mounting base 3.3. The lifting device controls the height of the first frame 3.2 until the soil splitting blade 3.4 is inserted into the ground at a suitable depth. The transmission drive device 4 drives the first rotating shaft 3.1 to rotate at the first speed most suitable for soil splitting. The soil splitting blade 3.4 begins to split the soil, and at the same time, the lifting device controls the soil splitting blade 3.4 to gradually penetrate deeper into the ground. When the lifting stroke of the lifting device reaches the threshold or the transmission drive device 4 is overloaded, the first rotating shaft 3.1 stops rotating, and the lifting device takes the soil splitting blade 3.4 out of the ground. Install the soil throwing plate 3.5 on the first mounting base 3.3. The lifting device controls the height of the first frame 3.2 until the soil throwing plate 3.5 is inserted into the ground at a suitable depth. The transmission drive device 4 drives the first rotating shaft 3.1 to rotate at the second speed most suitable for soil throwing. The soil throwing plate 3.5 throws out the soil, forming a soil pile that is easy for the bucket 5 to scoop away. As one embodiment, the variable speed drive device 4 can, according to a set algorithm, keep the first rotating shaft 3.1 at the optimal soil cracking / soil throwing depth when the lifting device is at different strokes.

[0042] In summary, the excavator undercarriage attachment provided in this embodiment allows for the installation of either a soil-splitting blade 3.4 or a soil-throwing plate 3.5 on the first rotating shaft 3.1. When encountering hard soil during excavation, the soil-splitting blade 3.4 is installed on the first rotating shaft to first split the soil into smaller pieces before proceeding with excavation. When encountering loose excavated soil during loading, the soil-throwing plate 3.5 is installed on the first rotating shaft 3.1. During loading, the loose excavated soil will scatter near the chassis 1, allowing for soil-throwing operations to first move the soil to a position easily reachable by the bucket 5 in front of the excavator. The transmission drive device 4 and the lifting device are used to apply appropriate rotational speeds and ground penetration depths when the soil-splitting blade 3.4 or the soil-throwing plate 3.5 is installed on the first rotating shaft 3.1, respectively. During excavation and soil splitting operations, the lifting device is adjusted to a suitable depth, and the transmission drive 4 rotates slowly in the forward direction, causing the soil splitting blade 3.4 to retract and cut the soil layer on the ground. During loading loose excavated soil, the lifting device is adjusted to a suitable height, and the transmission drive 4 rotates rapidly in the reverse direction, causing the soil-throwing plate 3.5 to push the excavated soil forward on the ground.

[0043] The variable speed drive device 4 and the lifting device are used to apply the most suitable rotation speed and depth of penetration into the ground when installing the soil splitting blade 3.4 or the soil throwing plate 3.5 on the first rotating shaft 3.1, respectively. By adjusting the speed of the variable speed drive device 4, the first rotating shaft 3.1 is at the optimal rotation speed at different depths, which improves the efficiency of processing hard soil layers. In addition, the soil splitter 3.4 can work in conjunction with the excavator's bucket 5. After the soil splitter 3.4 splits the hard soil layer, the bucket 5 can easily scoop it away. During loading operations, some of the excavated soil will be thrown to a position near the chassis 1 during the scooping process of the bucket 5. The soil-throwing plate 3.5 can throw the excavated soil back to the vicinity of the bucket 5, improving the working efficiency of the bucket 5. The rotation speed of the first shaft 3.1 can be different when using the soil splitter 3.4 and the soil-throwing plate 3.5 respectively. For example, when the first shaft 3.1 is equipped with the soil splitter 3.4, the rotation speed of the first shaft 3.1 can be reduced to ensure the soil splitting effect. When the first shaft 3.1 is equipped with the soil-throwing plate 3.5, the rotation speed can be increased, and the rotation direction is opposite to that when the first shaft 3.1 is equipped with the soil splitter 3.4. The soil-throwing plate 3.5 throws the excavated soil at high speed toward the bucket 5.

[0044] As one embodiment, the excavator's undercarriage attachment bucket 5 can also handle objects such as coal, sand, and ore. Example 2

[0045] This embodiment provides an excavator off-truck attachment. This embodiment is an optimization based on Embodiment 1 to improve the technical effect and refine the technical solution. For details not described in this embodiment, please refer to Embodiment 1.

[0046] As one embodiment, reference Figure 2 , Figure 3 and Figure 4The first frame 3.2 is rotatably connected to the chassis 1. The lifting device includes a first telescopic component 2, with both ends of the first telescopic component 2 rotatably connected to the first frame 3.2 and the chassis 1, respectively. The first telescopic component 2 is used to drive the rotation between the first frame 3.2 and the chassis 1, thereby controlling the distance between the lower attachment body 3 and the ground. The first frame 3.2 is connected to the chassis 1 in two places: firstly, it is rotatably connected to the chassis 1, and secondly, it is connected to the chassis 1 via 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 its telescopic movement, thereby controlling the height of the first frame 3.2 and the depth of the soil splitter 3.4 and the soil-throwing plate 3.5 into the ground.

[0047] In one embodiment, the chassis 1 includes a first support 1-2 and a second support 1-3. The first support 1-2 has a first hinge hole 1-2-1, and the second support 1-3 has a second hinge hole 1-3-1. The second hinge hole 1-3-1 and the first hinge hole 1-2-1 are spaced apart by a predetermined 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 weight of the dismount attachment body 3 is transferred to the chassis 1 through the first hinge hole 1-2-1, which is closer to the ground, reducing the weight load on the first telescopic component 2.

[0048] In one embodiment, the first support 1-2 and the second support 1-3 are reinforced and fixed to the X-frame 1-4 of the chassis 1 by a reinforcing plate 1-1.

[0049] As one embodiment, reference Figure 1 and Figure 5 The offloading attachment also includes a soil retainer 3.8, which is installed on the first frame 3.2. The inner wall of the soil retainer 3.8 matches the rotation trajectory of the cutting blade 3.4 or the throwing plate 3.5. The soil retainer 3.8 has an opening facing the bucket 5 to control the direction of soil ejection within it. In use, the cutting blade 3.4 or the throwing plate 3.5 carries the soil upwards. When the soil inside the soil retainer 3.8 is ejected by the cutting blade 3.4 or the throwing plate 3.5, it hits the soil retainer 3.8 and bounces back, preventing disorderly splashing of soil. Soil can only be ejected and form a mound near the bucket 5 when the ejection direction is towards the opening of the soil retainer 3.8.

[0050] As one embodiment, reference Figure 6The transmission drive device 4 includes a dual-speed hydraulic motor 4.1 and a transmission box connected to the dual-speed hydraulic motor 4.1. The transmission box includes an upper transmission box cover 4.7 and a lower transmission box cover 4.8 that 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 rotatably connected to the first end cover 4.5 and the second end cover 4.14 respectively. The first gear shaft 4.6 is torque-transmittingly connected to the output shaft of the dual-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.

[0051] Considering the potential for soil and debris to enter the transmission box, the two ends of the transmission box are respectively equipped with 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 dual-speed hydraulic motor 4.1, in addition to having a speed-changing function, has a more reliable rotation drive mechanism based on hydraulic principles.

[0052] In one embodiment, the transmission drive device 4 also includes 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 ring 4.10 is sleeved on the first gear shaft 4.6 corresponding to the position of the thrust bearing 4.13. The retaining ring 4.10 and the thrust bearing 4.13 are used to limit the axial displacement of the first gear shaft 4.6.

[0053] When the soil splitter 3.4 and the soil-throwing plate 3.5 are processing hard soil layers, the hard soil layers will generate reverse vibrations, and the first gear shaft 4.6 has a tendency to wobble along the axial direction. However, in this embodiment, the axial wobble of the first gear shaft 4.6 is avoided by the snap ring 4.10 and the thrust bearing 4.13.

[0054] In one embodiment, the first end cap 4.5 is supported and connected to the first frame 3.2 by a plurality of third bolts 4.2; the first gear shaft 4.6 is a spline shaft, and the first rotating shaft 3.1 is provided with a spline 3.9 at one end near the first gear shaft 4.6 for torque transmission connection with the first gear shaft 4.6.

[0055] In this embodiment, the first gear shaft 4.6 and the first rotating shaft 3.1 are directly connected by spline 3.9, and the speed change drive device 4 is fixed to the first frame 3.2 by the third bolt 4.2, so as to minimize the impact of shaking on the transmission process.

[0056] As one embodiment, reference Figure 5 and Figure 9The first mounting base 3.3 is provided with mounting positions 3.10 for connecting with the soil splitting blade 3.4 or the soil throwing plate 3.5. The multiple first mounting bases 3.3 are divided into a first group and a second group respectively. In the first group, the mounting positions 3.10 are arranged on the first mounting base 3.3 along a first direction, and in the second group, the mounting positions 3.10 are arranged on the first mounting base 3.3 along a second direction. The first direction and the second direction are perpendicular to each other, and the first mounting bases 3.3 of the first group and the first mounting bases 3.3 of the second group are alternately arranged on the first rotating shaft 3.1.

[0057] First, the first mounting seats 3.3 of the first and second groups are arranged alternately, so that the first rotating shaft 3.1 has at least multiple opportunities for the soil-splitting blade 3.4 and the soil-throwing plate 3.5 to contact the ground within a single rotation cycle, and the reaction force of the ground acts on the first mounting seats 3.3 of the first and second groups respectively, reducing the impact on the individual first mounting seat 3.3. Since the soil-splitting blade 3.4 and the soil-throwing plate 3.5 have at least multiple opportunities to contact the ground within a single rotation cycle, the torque requirement of the transmission drive device 4 can be relaxed. Under the premise of treating the same depth of hard ground, increasing the number of times the ground is contacted within a single rotation cycle can reduce the impact on the entire excavator undercarriage attachment at each ground contact opportunity. The first direction and the second direction are perpendicular to each other 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 mounted on the first frame 3.2.

[0058] As one embodiment, reference Figure 7 and Figure 8 The installation position 3.10 is provided with a third bolt hole; the soil splitting blade 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 that matches the third bolt hole; the soil 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 that matches the third bolt hole. The third bolt hole and the second bolt hole are connected simultaneously by a fourth bolt to realize the installation of the soil splitting blade 3.4 and the soil throwing plate 3.5.

[0059] As one embodiment, reference Figure 4The first telescopic component 2 includes a first telescopic cylinder 2-2. The two ends of the first telescopic cylinder are rotatably connected to a first hinge shaft 2-1 and a 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 base 3.7 and the second hinge hole 1-3-1. The first hinge shaft 2-1 is provided with a first fixed pin, and the second hinge shaft 2-5 is provided with a second fixed pin 2-3. The fourth mounting base 3.7 and the second hinge hole 1-3-1 are respectively provided with holes that match the first fixed pin and the second fixed pin 2-3. The first telescopic cylinder 2-2 is connected by inserting the pins into the holes.

[0060] The excavator offloading attachment provided in this embodiment improves processing efficiency and reduces the impact of reaction vibration. Example 3

[0061] This embodiment provides an excavator, see reference. Figure 1 The system includes a bucket 5 and excavator attachments provided in Embodiment 1 or 2, with the attachments mounted on the chassis 1 near the front of the bucket 5. In use, when excavating hard soil layers, a soil-cracking operation is performed first, followed by excavation, significantly improving the bucket's excavation efficiency. Simultaneously, the excavator provided in this embodiment possesses the same technical effects as in Embodiment 1 or 2, which will not be repeated here. When loading loose materials, a soil-throwing operation is performed first, throwing the pile of excavated soil scattered in front of the chassis from top to bottom to a position that the bucket 5 can handle.

[0062] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0063] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," "located in," "equipped with," "located in," "installed," "set," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances. "Hinged connection" includes "rotational connection."

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. An excavator undercarriage attachment, characterized in that, include, The off-vehicle attachment body (3) includes 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). The soil splitting blade (3.4) and the soil throwing plate (3.5) can be detachably connected to the first mounting seat (3.3) respectively. The variable speed drive device (4) is connected to the first rotating shaft (3.1) for torque transmission; The lifting device is used to control the distance between the lowering attachment body (3) and the ground. The first frame (3.2) is mounted on the chassis (1) via the lifting device. The unloading attachment body also includes a soil retainer (3.8), which is installed on the first frame (3.2). The inner wall of the soil retainer (3.8) matches the rotation trajectory of the soil splitter (3.4) or the soil throwing plate (3.5). The soil retainer (3.8) has an opening facing the bucket (5) to control the direction of the soil and debris thrown inside the soil retainer (3.8). The first mounting base (3.3) is provided with mounting positions (3.10) for connecting with the soil splitting blade (3.4) or the soil throwing plate (3.5). The plurality of first mounting bases (3.3) are divided into a first group and a second group respectively. The mounting positions (3.10) in the first group are arranged on the first mounting base (3.3) along a first direction, and the mounting positions (3.10) in the second group are arranged on the first mounting base (3.3) along a second direction. The first direction and the second direction are perpendicular to each other.

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 includes a first telescopic component (2), the two ends of which are rotatably connected to the first frame (3.2) and the chassis (1), respectively. 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 dismount attachment body and the ground.

3. The excavator undercarriage attachment according to claim 2, characterized in that, The chassis (1) includes a first support (1-2) and a second support (1-3). The first support (1-2) has a first hinge hole (1-2-1), and the second support (1-3) has a second hinge hole (1-3-1). The second hinge hole (1-3-1) and the first hinge hole (1-2-1) are spaced apart 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 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 second support (1-3) through the second hinge hole (1-3-1).

4. The excavator undercarriage attachment according to claim 1, characterized in that, The variable speed drive device (4) includes a dual-speed hydraulic motor (4.1) and a transmission box connected to the dual-speed hydraulic motor (4.1). The transmission box includes a transmission box upper cover (4.7) and a transmission box lower cover (4.8) 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). A first gear shaft (4.6) is 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 the output shaft of the dual-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).

5. The excavator undercarriage attachment according to claim 4, characterized in that, The transmission drive device (4) further 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). A retaining ring (4.10) is sleeved on the first gear shaft (4.6) corresponding to the position of the thrust bearing (4.13). The retaining ring (4.10) and the thrust bearing (4.13) are used to limit the axial displacement of the first gear shaft (4.6).

6. The excavator undercarriage attachment according to claim 5, characterized in that, The first end cap (4.5) is supported and connected to the first frame (3.2) by a plurality of third bolts (4.2); The first gear shaft (4.6) is a spline shaft, and the first rotating shaft (3.1) is provided with a spline (3.9) at one end near the first gear shaft (4.6) for torque transmission connection with the first gear shaft (4.6).

7. The excavator undercarriage attachment according to claim 1, characterized in that, The first mounting base (3.3) of the first group and the first mounting base (3.3) of the second group are alternately arranged on the first rotating shaft (3.1).

8. The excavator undercarriage attachment according to claim 7, characterized in that, The mounting position (3.10) is provided with a third bolt hole; The soil splitting knife (3.4) includes a blade (3.4.1) and a first fixing seat (3.4.2) connected to the blade (3.4.1), wherein the first fixing seat (3.4.2) has a second bolt hole that matches the third bolt hole; The soil-spreading plate (3.5) includes a scraper (3.5.1) and a second fixing seat (3.5.2) connected to the scraper (3.5.1), wherein the second fixing seat (3.5.2) has a second bolt hole that matches the third bolt hole.

9. An excavator, characterized in that, It includes a bucket (5) and an excavator undercarriage attachment as provided in any one of claims 1 to 8, the excavator undercarriage attachment being mounted on the side of the chassis (1) near the bucket (5).

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