A furrow opener

Abstract

The application is suitable for the ditching machine field, and provides a novel ditching machine, which comprises a mounting frame, a rotating shaft rotatably connected to the mounting frame, two symmetrical fixing keys fixedly connected to the rotating shaft, and two ditching discs slidably connected to the rotating shaft, and a first key groove compatible with the fixing key is formed in the ditching disc; the novel ditching machine further comprises a first motor fixedly installed on the mounting frame, an output shaft of the first motor fixedly connected to one end of the rotating shaft, and an adjusting mechanism installed on the rotating shaft, two output ends of the adjusting mechanism connected to the two ditching discs respectively, and the adjusting mechanism used for adjusting the distance between the two ditching discs. When different width trenches are to be dug, the two ditching discs are moved by the adjusting mechanism, so that the distance between the two ditching discs can be adjusted, and then the width of the trench to be dug can be adjusted, and the ditching machine does not need to be replaced, and the use is more convenient.

Description

Technical Field

[0001] This invention belongs to the field of trenching machines, and particularly relates to a trenching machine. Background Technology

[0002] Trenching machines are used in construction projects to excavate narrow and deep underground trenches for laying underground drainage pipes, cables, and other conduits. They are also used in orchards, vegetable gardens, and other farmland for ditching, drainage, planting, and irrigation. Based on installation location, trenching machines are generally divided into front-mounted and rear-mounted types. Front-mounted trenching machines are typically installed in front of the head of a hand-held tractor or four-wheeled tractor, while rear-mounted trenching machines are typically installed behind the tractor. Based on trenching method, trenching machines are generally divided into chain-driven and disc-driven types.

[0003] Existing disc trenchers typically have the problem of not being able to adjust the trench width. Since the disc on the trencher is a fixed structure, it can only open trenches of a fixed width. When you want to open trenches of different widths, you have to change to a different trencher, which is very inconvenient.

[0004] To avoid the aforementioned technical problems, it is indeed necessary to provide a trenching machine to overcome the deficiencies in the prior art. Summary of the Invention

[0005] The purpose of this invention is to provide a trenching machine that solves the problem that existing disc trenching machines cannot open trenches of different widths.

[0006] This invention is implemented as follows: a trenching machine includes a mounting frame, a connecting frame fixedly connected to the side of the mounting frame, the mounting frame being able to be mounted on a tractor via the connecting frame, a rotating shaft rotatably connected to the mounting frame, two symmetrical fixing keys fixedly connected to the rotating shaft, two trenching discs slidably connected to the rotating shaft, and a first keyway adapted to the fixing keys on the trenching discs, further comprising:

[0007] A first electric motor is fixedly mounted on a mounting bracket, and the output shaft of the first electric motor is fixedly connected to one end of a rotating shaft.

[0008] An adjustment mechanism is mounted on a rotating shaft. The two output ends of the adjustment mechanism are respectively connected to two trenching discs. The adjustment mechanism is used to adjust the distance between the two trenching discs, thereby changing the width of the trench.

[0009] A mud-blocking assembly is mounted on a mounting frame and is located on the side of the trenching disc away from the connecting frame. The mud-blocking assembly is used to prevent the soil excavated by the trenching disc from falling back into the trench.

[0010] The soil-lifting mechanism is mounted on a mounting frame and located between the trenching plate and the connecting frame. The two output ends of the soil-lifting mechanism are located on both sides of the mounting frame. The soil-lifting mechanism is used to dump the soil excavated from the trenching plate.

[0011] A further technical solution is that the trenching disc includes a disc, a plurality of fixed trenching cutters, and a plurality of movable trenching cutters. The disc is slidably connected to a rotating shaft. The plurality of fixed trenching cutters and the plurality of movable trenching cutters are all installed on the side of the disc, and the plurality of fixed trenching cutters and the plurality of movable trenching cutters are evenly distributed around the axis of the disc. The fixed trenching cutters and the movable trenching cutters are staggered, and the movable trenching cutters are elastically inclined toward the center of the mounting frame.

[0012] A further technical solution includes a mounting base for the movable trenching cutter, which is fixedly connected to a disc. A pin is fixedly connected to the side of the mounting base, and a cutter bar is rotatably connected to the pin. A cutter head is fixedly connected to one end of the cutter bar, and a torsion spring connects the cutter bar and the pin. Initially, the cutter bar is inclined relative to the mounting base. The structure of the fixed trenching cutter is similar to that of the movable trenching cutter, except that the cutter bar on the fixed trenching cutter is fixedly connected to the mounting base, and the extension line of the cutter bar's axis points towards the axis of the disc. Preferably, a soil-blocking plate is fixedly connected to the cutter bar to increase the area of ​​the cutter bar. When the disc rotates, both the movable and fixed trenching cutters can rotate together with the soil through the soil-blocking plate. Under the action of centrifugal force, the soil falls to the soil-lifting mechanism and is finally dumped on both sides of the trench.

[0013] In a further technical solution, the disc includes a rotating sleeve, multiple connecting ribs, and a ring. The rotating sleeve is slidably connected to a rotating shaft, and the multiple connecting ribs are fixedly connected to the side of the rotating sleeve. The ring is fixedly connected to one end of the multiple connecting ribs, and the axis of the ring coincides with the axis of the rotating sleeve. The multiple connecting ribs are evenly distributed around the axis of the rotating sleeve.

[0014] In a further technical solution, the adjustment mechanism includes:

[0015] A screw, one end of which is rotatably connected to a rotating shaft;

[0016] An adjusting block, which is threadedly connected to the screw;

[0017] Two connecting rods, one end of each connecting rod is hinged to both sides of the adjusting block, and the other end of each connecting rod is hinged to the opposite sides of the connecting ribs on the two discs.

[0018] An adjustment assembly is mounted on a rotating shaft. One end of the adjustment assembly is connected to one end of a screw. The adjustment assembly drives the screw to rotate, the screw drives the adjustment block to move, and the adjustment block drives two discs to move through a connecting rod, thereby adjusting the distance between the two discs.

[0019] In a further technical solution, the adjusting assembly includes an adjusting rod rotatably connected to a rotating shaft. The rotating shaft has a cavity inside. A first bevel gear is fixedly connected to one end of the adjusting rod located in the cavity. A second bevel gear is fixedly connected to one end of the screw extending into the cavity. The first bevel gear and the second bevel gear are meshed together. An adjusting nut is fixedly connected to one end of the adjusting rod located outside the rotating shaft.

[0020] In a further technical solution, the screw, adjusting block, two connecting rods, and second bevel gear constitute a drive assembly. There are multiple drive assemblies, which are evenly distributed around the axis of the disk. All of the second bevel gears mesh with the first bevel gear.

[0021] A further technical solution is provided, wherein the mudguard assembly includes a fixed mudguard plate and two movable mudguard plates. The fixed mudguard plate is fixedly connected to the mounting frame, and a groove is formed on the fixed mudguard plate. Both movable mudguard plates are slidably connected in the groove. The width of the fixed mudguard plate is not greater than the sum of the widths of the two rings. A double-ended screw is rotatably connected to the fixed mudguard plate, and the double-ended screw is threadedly connected to both movable mudguard plates. The bottom of the movable mudguard plate and the bottom of the disc are on the same horizontal plane.

[0022] A further technical solution includes a soil-collecting plate fixedly connected to a mounting frame, a protective box fixedly connected to the soil-collecting plate, the top cross-section of the protective box being triangular to facilitate soil sliding to both sides of the protective box, a rotating rod rotatably connected to the protective box, and helical blades fixedly connected to both ends of the rotating rod, the two helical blades being symmetrically distributed about the center line of the rotating rod, soil outlets adapted to the helical blades being opened on both sides of the mounting frame, a second motor fixedly installed on the mounting frame, a third bevel gear fixedly connected to the output shaft of the second motor extending into the protective box, a fourth bevel gear fixedly connected to the rotating rod, the third bevel gear and the fourth bevel gear being meshed together, and an inclined guide plate fixedly connected to the soil-collecting plate, the guide plate being used to allow more soil to fall onto the soil-collecting plate.

[0023] A further technical solution includes two stabilizing mechanisms, which are respectively installed on both sides of the two trenching discs, and one end of each stabilizing mechanism is elastically abutting against the mounting frame. Each stabilizing mechanism includes a rotating plate, which is slidably connected to a rotating shaft. The rotating plate has a second keyway adapted to the fixed key. A rotating ring is rotatably connected to the side of the rotating plate, and a compression spring is fixedly connected to the side of the rotating ring. One end of the compression spring is fixedly connected to an abutting plate, and the side of the abutting plate abuts against the mounting frame.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. When digging trenches of different widths, turn the adjusting nut. The adjusting nut drives the adjusting rod to rotate, which in turn drives the first bevel gear to rotate. The first bevel gear drives the second bevel gear to rotate, which in turn drives the screw to rotate. The screw drives the adjusting block to move, and the adjusting block drives the two trenching discs to move through the connecting rod. This allows the distance between the two trenching discs to be adjusted, thereby adjusting the width of the trench to be dug. There is no need to replace the trencher, making it more convenient to use.

[0026] 2. Rotate the double-ended lead screw, which drives the two movable mudguards to move, so that the width of the movable mudguards matches the width of the trench, which can clean the soil in the trench and improve the quality of trenching. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0028] Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 Enlarged structural diagram at point A in the middle;

[0030] Figure 4 This is a side view cross-sectional structural diagram of the present invention;

[0031] Figure 5 For the present invention Figure 4 Enlarged structural diagram at point B;

[0032] Figure 6 This is a schematic diagram of the three-dimensional structure of the trenching disc of the present invention;

[0033] Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the rotating shaft of the present invention;

[0034] Figure 8 This is a three-dimensional structural diagram of the stabilizing mechanism of the present invention.

[0035] In the attached diagram: 1. Mounting frame; 2. Connecting frame; 3. Rotating shaft; 4. Fixing key; 5. Trenching disc; 51. Disc; 511. Rotating sleeve; 512. Connecting rib; 513. Ring; 52. Fixed trenching cutter; 53. Movable trenching cutter; 531. Mounting base; 532. Pin; 533. Cutter bar; 534. Cutter head; 535. Soil retaining plate; 6. First motor; 7. Adjusting mechanism; 71. Screw; 72. Adjusting block; 73. Connecting rod; 74. Adjusting assembly; 741. Adjusting rod; 742. 743. First bevel gear; 744. Second bevel gear; 745. Adjusting nut; 8. Mudguard assembly; 81. Fixed mudguard; 82. Movable mudguard; 83. Double-ended lead screw; 9. Soil lifting mechanism; 91. Soil gathering plate; 92. Protective box; 93. Rotating rod; 94. Spiral blade; 95. Second motor; 96. Third bevel gear; 97. Fourth bevel gear; 98. Guide plate; 10. Stabilizing mechanism; 101. Rotating plate; 102. Rotating ring; 103. Compression spring; 104. Abutment plate. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0038] like Figure 1-8 As shown, a trenching machine provided by the present invention includes a mounting frame 1, a connecting frame 2 fixedly connected to the side of the mounting frame 1, the mounting frame 1 being able to be mounted on a tractor via the connecting frame 2, a rotating shaft 3 rotatably connected to the mounting frame 1, two symmetrical fixing keys 4 fixedly connected to the rotating shaft 3, and two trenching discs 5 slidably connected to the rotating shaft 3, each trenching disc 5 having a first keyway adapted to the fixing keys 4, and further comprising:

[0039] The first electric motor 6 is fixedly mounted on the mounting bracket 1, and the output shaft of the first electric motor 6 is fixedly connected to one end of the rotating shaft 3.

[0040] The adjustment mechanism 7 is mounted on the rotating shaft 3. The two output ends of the adjustment mechanism 7 are respectively connected to two trenching discs 5. The adjustment mechanism 7 is used to adjust the distance between the two trenching discs 5, thereby changing the width of the trench.

[0041] The mud-blocking assembly 8 is mounted on the mounting frame 1 and is located on the side of the trenching plate 5 away from the connecting frame 2. The mud-blocking assembly 8 is used to prevent the soil dug out by the trenching plate 5 from falling back into the trench.

[0042] The soil lifting mechanism 9 is installed on the mounting frame 1 and is located between the trenching plate 5 and the connecting frame 2. The two output ends of the soil lifting mechanism 9 are located on both sides of the mounting frame 1. The soil lifting mechanism 9 is used to dump the soil excavated from the trenching plate 5 and then dump the soil to both sides of the trench to prevent the soil from falling back into the trench.

[0043] In embodiments of the present invention, such as Figure 3 and Figure 6 As shown, in a preferred embodiment of the present invention, the trenching disc 5 includes a disc 51, a plurality of fixed trenching cutters 52 and a plurality of movable trenching cutters 53. The disc 51 is slidably connected to the rotating shaft 3. The plurality of fixed trenching cutters 52 and the plurality of movable trenching cutters 53 are all installed on the side of the disc 51, and the plurality of fixed trenching cutters 52 and the plurality of movable trenching cutters 53 are evenly distributed around the axis of the disc 51. The fixed trenching cutters 52 and the movable trenching cutters 53 are staggered, and the movable trenching cutters 53 are elastically inclined toward the center of the mounting frame 1.

[0044] In embodiments of the present invention, such as Figure 3 As shown, in a preferred embodiment of the present invention, the movable trenching cutter 53 includes a mounting base 531, which is fixedly connected to the disc 51. A pin 532 is fixedly connected to the side of the mounting base 531, and a cutter bar 533 is rotatably connected to the pin 532. A cutter head 534 is fixedly connected to one end of the cutter bar 533. A torsion spring is connected between the cutter bar 533 and the pin 532. Initially, the cutter bar 533 is inclined relative to the mounting base 531. The structure of the fixed trenching cutter 52 is similar to that of the movable trenching cutter 53. The difference lies in that: the cutter bar 533 on the fixed trenching cutter 52 is fixedly connected to the mounting base 531, and the extension line of the axis of the cutter bar 533 is directed toward the axis of the disc 51. Preferably, a soil retaining plate 535 is fixedly connected to the cutter bar 533. The soil retaining plate 535 is used to increase the area of ​​the cutter bar 533. When the disc 51 rotates, both the movable trenching cutter 53 and the fixed trenching cutter 52 can drive the soil to rotate together through the soil retaining plate 535. Under the action of centrifugal force, the soil will fall to the soil lifting mechanism 9, and the soil will finally be poured on both sides of the trench.

[0045] When the two trenching discs 5 come into contact, the two movable trenching cutters 53 also merge together to form a wider trenching cutter. When the two trenching discs 5 move away from each other, under the action of the torsion spring, the two movable trenching cutters 53 deflect towards each other, but they can still make contact. Figure 6 As shown, this allows for the excavation of all the soil in the trench, preventing any soil residue and making the trench cleaner.

[0046] In embodiments of the present invention, such as Figure 6 As shown, in a preferred embodiment of the present invention, the disc 51 includes a rotating sleeve 511, a plurality of connecting ribs 512, and a ring 513. The rotating sleeve 511 is slidably connected to the rotating shaft 3. The plurality of connecting ribs 512 are fixedly connected to the side of the rotating sleeve 511. The ring 513 is fixedly connected to one end of the plurality of connecting ribs 512. The axis of the ring 513 coincides with the axis of the rotating sleeve 511. The plurality of connecting ribs 512 are evenly distributed around the axis of the rotating sleeve 511.

[0047] In embodiments of the present invention, such as Figure 6-7 As shown, in a preferred embodiment of the present invention, the adjusting mechanism 7 includes:

[0048] Screw 71, one end of which is rotatably connected to rotating shaft 3;

[0049] Adjusting block 72, which is threadedly connected to screw 71;

[0050] Two connecting rods 73, one end of each connecting rod 73 is hinged to both sides of the adjusting block 72, and the other end of each connecting rod 73 is hinged to the opposite sides of the connecting ribs 512 on the two discs 51.

[0051] An adjustment component 74 is mounted on a rotating shaft 3. One end of the adjustment component 74 is connected to one end of a screw 71. The adjustment component 74 is used to drive the screw 71 to rotate. The screw 71 drives the adjustment block 72 to move. The adjustment block 72 drives two discs 51 to move through a connecting rod 73, thereby adjusting the distance between the two discs 51.

[0052] In embodiments of the present invention, such as Figure 7 As shown, in a preferred embodiment of the present invention, the adjusting assembly 74 includes an adjusting rod 741 rotatably connected to the rotating shaft 3. The rotating shaft 3 has a cavity inside. A first bevel gear 742 is fixedly connected to one end of the adjusting rod 741 located in the cavity. A second bevel gear 743 is fixedly connected to one end of the screw 71 extending into the cavity. The first bevel gear 742 and the second bevel gear 743 are meshed together. An adjusting nut 744 is fixedly connected to one end of the adjusting rod 741 located outside the rotating shaft 3.

[0053] In embodiments of the present invention, such as Figure 6-7As shown, in a preferred embodiment of the present invention, the screw 71, adjusting block 72, two connecting rods 73, and second bevel gear 743 constitute a drive assembly. There are multiple drive assemblies, evenly distributed around the axis of the disk 51, and all of the second bevel gears 743 mesh with the first bevel gear 742. Multiple drive assemblies increase the stability and robustness between the two grooved disks 5.

[0054] In embodiments of the present invention, such as Figure 3 As shown, in a preferred embodiment of the present invention, the mudguard assembly 8 includes a fixed mudguard plate 81 and two movable mudguard plates 82. The fixed mudguard plate 81 is fixedly connected to the mounting bracket 1. The fixed mudguard plate 81 has a groove, and the two movable mudguard plates 82 are slidably connected in the groove. The width of the fixed mudguard plate 81 is not greater than the sum of the widths of the two rings 513. A double-ended screw rod 83 is rotatably connected to the fixed mudguard plate 81. The double-ended screw rod 83 is threadedly connected to both movable mudguard plates 82. The bottom of the movable mudguard plate 82 and the bottom of the disc 51 are in the same horizontal plane.

[0055] Rotating the double-ended lead screw 83 causes the two movable mudguards 82 to move towards or away from each other, making the width between the two movable mudguards 82 the same as the width between the two discs 51. This allows the width of the mudguard assembly 8 to match the width of the trench, and the movable mudguards 82 can also scrape the mud in the trench clean, thus improving the quality of trenching.

[0056] In embodiments of the present invention, such as Figure 2 and Figure 5 As shown, in a preferred embodiment of the present invention, the soil-lifting mechanism 9 includes a soil-gathering plate 91 fixedly connected to the mounting frame 1. A protective box 92 is fixedly connected to the soil-gathering plate 91. The top cross-section of the protective box 92 is triangular to facilitate the soil sliding to both sides of the protective box 92. A rotating rod 93 is rotatably connected to the protective box 92. Both ends of the rotating rod 93 are fixedly connected to helical blades 94. The two helical blades 94 are symmetrically distributed about the center line of the rotating rod 93. Soil outlets adapted to the helical blades 94 are opened on both sides of the mounting frame 1. A second motor 95 is fixedly installed on the mounting frame 1. The output shaft of the second motor 95, which extends into the protective box 92, is fixedly connected to a third bevel gear 96. A fourth bevel gear 97 is fixedly connected to the rotating rod 93. The third bevel gear 96 and the fourth bevel gear 97 are meshed together. An inclined guide plate 98 is fixedly connected to the soil-gathering plate 91. The guide plate 98 is used to allow more soil to fall onto the soil-gathering plate 91.

[0057] In embodiments of the present invention, such as Figure 5 and Figure 8 As shown, in a preferred embodiment of the present invention, two stabilizing mechanisms 10 are further included. The two stabilizing mechanisms 10 are respectively installed on both sides of the two trenching discs 5, and one end of each stabilizing mechanism 10 elastically abuts against the mounting frame 1. Each stabilizing mechanism 10 includes a rotating plate 101, which is slidably connected to the rotating shaft 3. A second keyway adapted to the fixing key 4 is provided on the rotating plate 101. A rotating ring 102 is rotatably connected to the side of the rotating plate 101, and a compression spring 103 is fixedly connected to the side of the rotating ring 102. One end of the compression spring 103 is fixedly connected to an abutment plate 104, and the side of the abutment plate 104 abuts against the mounting frame 1. Under the action of the two compression springs 103, the two stabilizing mechanisms 10 respectively provide elastic force to the two trenching discs 5 towards the center of the mounting frame 1, thereby preventing the trenching discs 5 from wobbling on the rotating shaft 3 and making the trenching discs 5 more stable.

[0058] In use, the mounting frame 1 is installed on the tractor via the connecting frame 2, and the tractor can then use the device to dig trenches. The first motor 6 drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the trenching disc 5 to rotate. The trenching disc 5 digs trenches in the ground. Under the constraint of the mud-blocking assembly 8 and the mounting frame 1, the excavated soil moves along the movable mud-blocking plate 82 and the mounting frame 1. Under the action of centrifugal force, the soil is thrown onto the soil-gathering plate 91 by the mud-blocking plate 535. The second motor 95 drives the third bevel gear 96 to rotate, the third bevel gear 96 drives the fourth bevel gear 97 to rotate, the fourth bevel gear 97 drives the rotating rod 93 to rotate, and the rotating rod 93 drives the two spiral blades 94 to rotate. The spiral blades 94 discharge the soil on the soil-gathering plate 91 to both sides of the trench, preventing the soil from falling back into the trench. When digging trenches of different widths, rotating the adjusting nut 744 causes the adjusting rod 741 to rotate, which in turn drives the first bevel gear 742 to rotate. The first bevel gear 742 then drives the second bevel gear 743 to rotate, which in turn drives the screw 71 to rotate. The screw 71 then moves the adjusting block 72, which, through the connecting rod 73, moves the two trenching discs 5, thus adjusting the distance between them and consequently the width of the trench. This eliminates the need to replace the trencher, making it more convenient to use. Then, rotating the double-ended lead screw 83 moves the two movable mudguards 82, allowing the width of the mudguards 82 to match the width of the trench. This effectively removes the soil from the trench, resulting in higher trenching quality.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0060] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A trenching machine, comprising a mounting frame, characterized in that, The mounting bracket is rotatably connected to a rotating shaft, and two symmetrical fixing keys are fixedly connected to the rotating shaft. Two grooved discs are slidably connected to the rotating shaft, and each grooved disc has a first keyway adapted to the fixing keys. The bracket also includes: A first electric motor is fixedly mounted on a mounting bracket, and the output shaft of the first electric motor is fixedly connected to one end of a rotating shaft. An adjustment mechanism is mounted on a rotating shaft, and its two output ends are respectively connected to two trenching discs. The adjustment mechanism is used to adjust the distance between the two trenching discs. A mud-blocking assembly is mounted on a mounting frame and is located on the side of the trenching disc away from the connecting frame. The mud-blocking assembly is used to prevent the soil excavated by the trenching disc from falling back into the trench. A soil-lifting mechanism is installed on a mounting frame and located between a trenching disc and a connecting frame. The two output ends of the soil-lifting mechanism are located on both sides of the mounting frame. The soil-lifting mechanism is used to dump the soil excavated from the trenching disc. The trenching disc includes a disc, a plurality of fixed trenching cutters, and a plurality of movable trenching cutters. The disc is slidably connected to a rotating shaft. The plurality of fixed trenching cutters and the plurality of movable trenching cutters are all mounted on the side of the disc, and the plurality of fixed trenching cutters and the plurality of movable trenching cutters are evenly distributed around the axis of the disc. The fixed trenching cutters and the movable trenching cutters are staggered, and the movable trenching cutters are elastically inclined toward the center of the mounting frame. The movable trenching cutter includes a mounting base, which is fixedly connected to a disc. A pin is fixedly connected to the side of the mounting base, and a cutter bar is rotatably connected to the pin. A cutter head is fixedly connected to one end of the cutter bar. A torsion spring is connected between the cutter bar and the pin. Initially, the cutter bar is tilted relative to the mounting base, and a soil retaining plate is fixedly connected to the cutter bar.

2. The trencher according to claim 1, characterized in that, The disc includes a rotating sleeve, multiple connecting ribs, and a ring. The rotating sleeve is slidably connected to a rotating shaft. The multiple connecting ribs are fixedly connected to the side of the rotating sleeve. The ring is fixedly connected to one end of the multiple connecting ribs. The axis of the ring coincides with the axis of the rotating sleeve. The multiple connecting ribs are evenly distributed around the axis of the rotating sleeve.

3. The trencher according to claim 2, characterized in that, The adjustment mechanism includes: A screw, one end of which is rotatably connected to a rotating shaft; An adjusting block, which is threadedly connected to the screw; Two connecting rods, one end of each connecting rod is hinged to both sides of the adjusting block, and the other end of each connecting rod is hinged to the opposite sides of the connecting ribs on the two discs. An adjustment assembly is mounted on a rotating shaft, with one end of the adjustment assembly being connected to one end of a screw for driving the screw to rotate.

4. The trencher according to claim 3, characterized in that, The adjusting assembly includes an adjusting rod rotatably connected to a rotating shaft. The rotating shaft has a cavity inside. A first bevel gear is fixedly connected to one end of the adjusting rod located in the cavity. A second bevel gear is fixedly connected to one end of the screw extending into the cavity. The first bevel gear and the second bevel gear are meshed together. An adjusting nut is fixedly connected to one end of the adjusting rod located outside the rotating shaft.

5. The trencher according to claim 4, characterized in that, The screw, adjusting block, two connecting rods, and second bevel gear constitute a drive assembly. There are multiple drive assemblies, which are evenly distributed around the axis of the disk. All of the second bevel gears mesh with the first bevel gear.

6. The trencher according to claim 2, characterized in that, The mudguard assembly includes a fixed mudguard plate and two movable mudguard plates. The fixed mudguard plate is fixedly connected to the mounting frame and has a groove. The two movable mudguard plates are slidably connected in the groove. The width of the fixed mudguard plate is not greater than the sum of the widths of the two rings. A double-ended screw is rotatably connected to the fixed mudguard plate. The double-ended screw is threaded to both movable mudguard plates. The bottom of the movable mudguard plate and the bottom of the disc are on the same horizontal plane.

7. The trencher according to claim 1, characterized in that, The soil-lifting mechanism includes a soil-gathering plate fixedly connected to a mounting frame, a protective box fixedly connected to the soil-gathering plate, the top cross-section of the protective box being triangular, a rotating rod rotatably connected to the protective box, and spiral blades fixedly connected to both ends of the rotating rod. The two spiral blades are symmetrically distributed about the center line of the rotating rod. Soil outlets adapted to the spiral blades are opened on both sides of the mounting frame. A second motor is fixedly installed on the mounting frame. The output shaft of the second motor, extending into the protective box, is fixedly connected to a third bevel gear. A fourth bevel gear is fixedly connected to the rotating rod. The third and fourth bevel gears are meshed together. An inclined guide plate is fixedly connected to the soil-gathering plate.

8. The trencher according to claim 1, characterized in that, It also includes two stabilizing mechanisms, which are respectively installed on both sides of the two trenching discs, and one end of each stabilizing mechanism is elastically abutting against the mounting frame. Each stabilizing mechanism includes a rotating plate, which is slidably connected to a rotating shaft. The rotating plate has a second keyway adapted to the fixed key. A rotating ring is rotatably connected to the side of the rotating plate, and a compression spring is fixedly connected to the side of the rotating ring. One end of the compression spring is fixedly connected to an abutting plate, and the side of the abutting plate abuts against the mounting frame.

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