Cable pipe trench excavating device

Abstract

The utility model discloses a cable pipe trench excavating device, and relates to the technical field of cable pipe trench excavating. The device comprises a mounting frame, and a driving device is arranged on the inner wall of the mounting frame. When the mounting frame is driven by propelling equipment to walk, the driving device drives the fluted disc to rotate and excavate, and after the telescopic assembly is started, the telescopic assembly repeatedly stretches and retracts to push the connecting block and the pushing plate to extend on the inner side of the protective cover, so that the pushing plate can repeatedly extend to the inner side of the toothed plate to push out soil blocks accumulated in the toothed plate during excavation. When the toothed plate continues to rotate, thrust is generated on the pushing plate, and then an elastic supporting effect is achieved on the pushing plate according to the telescopic property of the connecting spring, so that the supporting state of the pushing plate can be flexibly changed when the pushing plate is driven by the telescopic assembly to be recycled, the continuous rotating process of the toothed plate cannot be hindered, and soil blocks can be cleaned out repeatedly; and soil blocks generated in the excavating process are prevented from continuously falling into the groove to influence the excavating quality and the working efficiency of the cable groove.

Description

Technical Field

[0001] The utility model belongs to the technical field of cable trench excavation, and in particular relates to a cable trench excavation device. Background Art

[0002] A cable is made of one or more mutually insulated conductors and an outer insulating protective layer. It is a wire that transmits electricity or information from one place to another. When using the cable, it needs to be buried in the ground. Setting the cable in the ground can not only save space, but also reduce cable damage and increase the service life of the cable.

[0003] When burying cables in the ground during power construction, a trencher is needed to dig trenches. The trencher drives a soil-breaking block through a chain to dig trenches in the ground. When the existing trencher is in trenching operation, most of the soil in the trench is transported to one side of the spiral conveyor knife through the chain and the soil-breaking block, and then transported to both sides of the trench through the spiral conveyor knife. A small amount of soil will be transported out from one end of the fixed frame of the trencher through the chain and the soil-breaking block. The soil transported out from one end of the fixed frame of the trencher will cause some of the soil to fall into the trench again, thereby affecting the trenching and soil transportation effect of the trencher and the quality of trench excavation.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Utility Model Content

[0005] In view of the problems in the related technology, the utility model proposes a cable trench digging device to overcome the above technical problems existing in the existing related technology.

[0006] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0007] The utility model discloses a cable trench excavation device, comprising a mounting frame, an inner wall of the mounting frame is provided with a driving device, an output end of the driving device is provided with a toothed disc, an outer surface of the toothed disc is provided with a toothed plate, an outer surface of the mounting frame is slidably connected with a supporting assembly, an outer surface of the mounting frame is provided with a protective cover, a cross bar is fixedly installed on the inner wall of the mounting frame, a telescopic assembly is provided on the top of the cross bar, an output end of the telescopic assembly is fixedly connected with a connecting block, one end of the connecting block is fixedly connected with a connecting spring, and one end of the connecting spring is fixedly installed with a pushing plate.

[0008] Furthermore, the mounting frame comprises a bottom support frame, an outer surface of the bottom support frame is rotatably connected to a mounting plate, and an outer surface of the cross bar is provided with a stretching device.

[0009] Furthermore, the driving device comprises a driving motor, an output end of the driving motor is provided with a driving shaft, and an outer surface of the driving shaft is provided with a bearing seat.

[0010] Furthermore, the support assembly includes a support column, a spring column is fixedly installed inside the support column, a connecting seat is fixedly installed at the bottom of the spring column, a roller is rotatably installed on the inner wall of the connecting seat, and the support column is slidably connected to the outer surface of the bottom support frame.

[0011] Furthermore, the outer surface of the bottom support frame is provided with a side plate, the inner wall of the side plate is provided with a sliding groove, the outer surface of the side plate is fixedly installed with a threaded plate, the inner wall of the threaded plate is threadedly connected with an adjusting screw, and the bottom of the adjusting screw passes through and is threadedly connected to the inside of the support column.

[0012] Furthermore, the telescopic assembly includes a mounting seat, which is sleeved on the outer surface of the cross bar, and a cylinder is fixedly installed on the top of the mounting seat. A telescopic shaft is provided at the output end of the cylinder, and the output end of the telescopic shaft passes through the interior of the protective cover and is fixedly connected to the connecting block.

[0013] Furthermore, the stretching device comprises a hydraulic cylinder, the output end of the hydraulic cylinder is provided with a hydraulic rod, the output end of the hydraulic rod is fixedly mounted with a connecting sleeve, and the connecting sleeve is sleeved on the outer surface of the cross bar.

[0014] Furthermore, there are two groups of hydraulic cylinders and hydraulic rods, and one end of the two groups of hydraulic cylinders is fixedly installed with a mounting sleeve.

[0015] Furthermore, a through pipe is provided on the outer surface of the protective cover, and the through pipe is coaxially arranged with the telescopic shaft.

[0016] Furthermore, a connecting support plate is fixedly mounted on one side of the bottom support frame, and the connecting support plate passes through the outer surface of the driving shaft.

[0017] The utility model has the following beneficial effects:

[0018] 1. The utility model supports the telescopic component above the cross bar. When the mounting frame is driven by the propulsion device to move, its driving device drives the toothed disc to rotate and dig. After the telescopic component is started, it repeatedly telescopes and pushes the connecting block and the pushing plate to extend on the inner side of the protective cover, so that the pushing plate can repeatedly extend to the inner side of the toothed plate to push out the soil blocks excavated and accumulated inside the toothed plate. When the toothed plate continues to rotate, it generates thrust on the pushing plate, which has an elastic supporting effect on the pushing plate according to the telescopic property of the connecting spring, so that when it is driven and recovered by the telescopic component, its supporting state can be flexibly changed, and the continued rotation process of the toothed plate will not be hindered. In this way, the soil blocks can be repeatedly cleaned out, and the soil blocks generated during the excavation process are prevented from continuing to fall into the groove and affecting the excavation quality and operation efficiency of the cable groove.

[0019] 2. The utility model supports the cylinder on the outside of the cross bar through the mounting seat. When the cylinder is started, it drives the telescopic shaft to extend and retract, and then pushes the connecting block and the pushing plate to extend inside the protective cover, so as to provide driving force for cleaning the soil blocks inside the tooth plate. By sleeve-connecting the connecting sleeve to the outer surface of the cross bar, when the hydraulic cylinder is started, it can drive the hydraulic rod to extend and retract to generate thrust or pulling force on the cross bar, so as to drive the bottom support frame to slightly flip, and raise or lower its height from the ground, and at the same time cooperate with the adjustment of the excavation depth of the toothed disc, so as to improve the flexibility and convenience when the bottom support frame and the toothed disc are used in combination.

[0020] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the utility model embodiments, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0023] Figure 2 This is a schematic diagram of the bottom support structure of the utility model;

[0024] Figure 3 This is the second schematic diagram of the three-dimensional structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the push plate structure of the utility model;

[0026] Figure 5 It is a schematic diagram of the side plate structure of the utility model;

[0027] Figure 6 For the utility model Figure 5 The enlarged structural diagram at A in the middle;

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Mounting frame; 2. Driving device; 3. Toothed disc; 4. Toothed plate; 5. Support assembly; 6. Protective cover; 7. Cross bar; 8. Telescopic assembly; 9. Connecting block; 10. Connecting spring; 11. Pushing plate; 101. Bottom support frame; 102. Mounting plate; 12. Stretching device; 201. Driving motor; 202. Driving shaft; 203. Bearing seat; 501. Support column; 502. Spring column; 503. Connecting seat; 504. Roller; 103. Side plate; 104. Slide; 13. Threaded plate; 14. Adjusting screw; 801. Mounting seat; 802. Cylinder; 803. Telescopic shaft; 1201. Hydraulic cylinder; 1202. Hydraulic rod; 1203. Connecting sleeve; 1204. Mounting sleeve; 15. Through pipe; 16. Connecting support plate. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the described embodiments are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present utility model, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inside" and the like indicating orientation or positional relationship are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0032] See also Figure 2 , Figure 4 As shown, the utility model is a cable trench excavation device, including a mounting frame 1, the inner wall of the mounting frame 1 is provided with a driving device 2, the output end of the driving device 2 is provided with a toothed disc 3, the outer surface of the toothed disc 3 is provided with a toothed plate 4, the outer surface of the mounting frame 1 is slidably connected with a support component 5, the outer surface of the mounting frame 1 is provided with a protective cover 6, the inner wall of the mounting frame 1 is fixedly provided with a cross bar 7, the top of the cross bar 7 is provided with a telescopic component 8, the output end of the telescopic component 8 is fixedly connected with a connecting block 9, one end of the connecting block 9 is fixedly connected with a connecting spring 10, and one end of the connecting spring 10 is fixedly provided with a pushing plate 11.

[0033] When in use, the mounting frame 1 is connected to the excavating mechanical equipment. When it is necessary to excavate the cable trench, the driving device 2 is started to drive the toothed disc 3 to rotate and drive the toothed plate 4 to rotate to contact the land to be excavated and turn the soil out. Since the toothed plate 4 continues to rotate after excavation, the excavated soil blocks are brought out and retained on the inner side of the toothed plate 4. When the toothed disc 3 continues to move and drives the toothed plate 4 to excavate, the telescopic component 8 above the cross bar 7 is started at the same time to make its output end telescope and penetrate the interior of the protective cover 6 to generate thrust to the connecting block 9, thereby causing the connecting block 9 to move from the inner side of the protective cover 6 to the inner side of the toothed disc 3. After the connecting block 9 is displaced, it pushes The connecting spring 10 and the pushing plate 11 move toward the inner side of the tooth plate 4. When one group of tooth plates 4 rotates close to the pushing plate 11, the pushing plate 11 continues to move forward to push out the soil blocks inside it. At this time, the cleaned tooth plate 4 continues to rotate and generates thrust on the pushing plate 11. At the same time, the pushing plate 11 is driven by the telescopic assembly 8 to retract in the opposite direction. When the tooth plate 4 pushes the pushing plate 11, the connecting spring 10 on its rear side retracts it and flips it at the same time according to its own elastic action. Until the next group of tooth plates 4 rotates to this position, the pushing plate 11 extends again, so that the soil blocks inside the tooth plate 4 are pushed out and fall to the outside of the excavated trench in this reciprocating manner.

[0034] The utility model supports the telescopic component 8 above the cross bar 7. When the mounting frame 1 is driven by the propulsion equipment to move, its driving device 2 drives the toothed disc 3 to rotate and dig. After the telescopic component 8 is started, it repeatedly telescopes and pushes the connecting block 9 and the pushing plate 11 to extend on the inner side of the protective cover 6, so that the pushing plate 11 can repeatedly extend to the inner side of the toothed plate 4 to push out the soil blocks excavated and accumulated inside it, and when the toothed plate 4 continues to rotate, the pushing plate 11 is thrusted and elastically supported according to the telescopic property of the connecting spring 10, so that when it is driven and recovered by the telescopic component 8, its supporting state can be flexibly changed, and the continued rotation process of the toothed plate 4 will not be hindered. In this way, the soil blocks can be repeatedly cleaned out, and the soil blocks generated during the excavation process are prevented from continuing to fall into the groove and affecting the excavation quality and operation efficiency of the cable groove.

[0035] In addition, in a specific application, the mounting frame 1 is mounted on a propulsion device, and the propulsion device is preferably a tractor.

[0036] In one embodiment, for the above-mentioned mounting frame 1, the mounting frame 1 includes a bottom support frame 101, the outer surface of the bottom support frame 101 is rotatably connected to a mounting plate 102, and the outer surface of the cross bar 7 is provided with a stretching device 12.

[0037] By rotatably connecting the bottom support frame 101 with the mounting plate 102, when the mounting plate 102 is installed with the propulsion device, the bottom support frame 101 can be supported on the rear side of the propulsion device, and the end of the stretching device 12 is connected to the propulsion device at the same time, so that when the stretching device 12 is started, its output end can be extended and retracted to pull the cross bar 7 and drive the bottom support frame 101 to flip and move.

[0038] After the end of the stretching device 12 is connected to the propulsion equipment, when the stretching device 12 is started, its output end has a telescopic effect, and then the cross bar 7 can be pulled to drive the bottom support frame 101 to move in cooperation with the end of the mounting plate 102, and then the bottom support frame 101 can be lifted or lowered, and the bottom groove depth of the toothed disc 3 can be adjusted at the same time.

[0039] In one embodiment, for the above-mentioned driving device 2 , the driving device 2 includes a driving motor 201 , a driving shaft 202 is disposed at an output end of the driving motor 201 , and a bearing seat 203 is disposed on an outer surface of the driving shaft 202 .

[0040] By bearing the bearing seat 203 above the bottom support frame 101, when the drive motor 201 is started, it drives the drive shaft 202 to rotate to drive the gear plate 3 to rotate. The bearing seat 203 can support the drive shaft 202 above the bottom support frame 101, so that the drive shaft 202 provides a stable rotational driving force for the gear plate 3.

[0041] In one embodiment, for the above-mentioned support assembly 5, the support assembly 5 includes a support column 501, a spring column 502 is fixedly installed inside the support column 501, a connecting seat 503 is fixedly installed at the bottom of the spring column 502, a roller 504 is rotatably installed on the inner wall of the connecting seat 503, and the support column 501 is slidably connected to the outer surface of the bottom support frame 101.

[0042] By slidingly connecting the support column 501 to the outside of the bottom support frame 101, the extension height of the support column 501 on the outside of the bottom support frame 101 can be adjusted by sliding. Through the cooperation with the spring column 502 and the roller 504, when the bottom support frame 101 is driven by the propulsion device to move, its roller 504 is driven to roll on the ground.

[0043] The roller 504 is supported under the bottom support frame 101 by the support column 501 and the spring column 502. When the bottom support frame 101 is driven to move, the roller 504 can support and roll the bottom of the bottom support frame 101. In addition, with the connection of the spring column 502, when the ground thickness on both sides of the trench changes after excavation, the spring column 502 can adjust the height of the roller 504 according to its own elasticity, so that it can flexibly adapt to the walking path.

[0044] In one embodiment, for the above-mentioned bottom support frame 101, a side panel 103 is provided on the outer surface of the bottom support frame 101, a slide groove 104 is provided on the inner wall of the side panel 103, a threaded plate 13 is fixedly installed on the outer surface of the side panel 103, an adjusting screw 14 is threadedly connected to the inner wall of the threaded plate 13, and the bottom of the adjusting screw 14 passes through and is threadedly connected to the inside of the support column 501.

[0045] By connecting the bottom end of the adjusting screw 14 to the internal thread of the support column 501, the adjusting screw 14 can be displaced and extended inside the threaded plate 13 by rotating it, thereby pushing the support column 501 to slide inside the slide groove 104 on the inner side of the side plate 103. When the adjusting screw 14 stops rotating, the top position of the support column 501 is fixed.

[0046] By setting a threaded plate 13 on the outer side of the side plate 103 and cooperating with the adjusting screw 14, the supporting height of the support column 501 can be adjusted to prevent the roller 504 at the bottom of the support column 501 from being unable to touch the ground when the toothed disc 3 digs deeper, thereby improving the flexibility of the roller support column 501 and the roller 504 in supporting the bottom support frame 101 to walk.

[0047] In one embodiment, for the above-mentioned telescopic component 8, the telescopic component 8 includes a mounting seat 801, and the mounting seat 801 is sleeved on the outer surface of the cross bar 7. A cylinder 802 is fixedly installed on the top of the mounting seat 801, and a telescopic shaft 803 is provided at the output end of the cylinder 802. The output end of the telescopic shaft 803 passes through the interior of the protective cover 6 and is fixedly connected to the connecting block 9.

[0048] The cylinder 802 is supported on the outside of the cross bar 7 by the mounting seat 801. When the cylinder 802 is started, it drives the telescopic shaft 803 to extend and retract, thereby pushing the connecting block 9 and the pushing plate 11 to extend inside the protective cover 6, thereby providing driving force for cleaning the soil blocks inside the tooth plate 4.

[0049] In one embodiment, for the above-mentioned stretching device 12, the stretching device 12 includes a hydraulic cylinder 1201, and a hydraulic rod 1202 is provided at the output end of the hydraulic cylinder 1201. A connecting sleeve 1203 is fixedly installed at the output end of the hydraulic rod 1202, and the connecting sleeve 1203 is sleeved on the outer surface of the cross bar 7.

[0050] By sleeve-connecting the connecting sleeve 1203 on the outer surface of the cross bar 7, when the hydraulic cylinder 1201 is started, it can drive the hydraulic rod 1202 to extend and retract to generate thrust or pulling force on the cross bar 7, so as to drive the bottom support frame 101 to flip slightly, raise or lower its height from the ground, and at the same time adjust the digging depth of the toothed disc 3, thereby enhancing the flexibility and convenience of the bottom support frame 101 when used in conjunction with the toothed disc 3.

[0051] In one embodiment, for the hydraulic cylinder 1201 , there are two groups of the hydraulic cylinder 1201 and the hydraulic rod 1202 , and a mounting sleeve 1204 is fixedly mounted on one end of the two groups of hydraulic cylinders 1201 .

[0052] Through the cooperation of two groups of hydraulic cylinders 1201 and hydraulic rods 1202, a balanced traction force can be provided for the bottom support frame 101, so that the bottom support frame 101 is driven to move more smoothly. The installation sleeve 1204 can provide a connection mechanism for the installation of the hydraulic cylinder 1201 and the propulsion equipment, which is convenient for use with the propulsion equipment.

[0053] In one embodiment, for the protective cover 6 , a through-tube 15 is disposed on the outer surface of the protective cover 6 , and the through-tube 15 is disposed coaxially with the telescopic shaft 803 .

[0054] The through pipe 15 is located on the outside of the protective cover 6 . When the telescopic shaft 803 is driven to telescope, it always telescopes along the inside of the through pipe 15 , and at the same time, it facilitates the displacement of the connecting block 9 by providing a movable channel.

[0055] In one embodiment, for the bottom support frame 101 , a connecting plate 16 is fixedly mounted on one side of the bottom support frame 101 , and the connecting plate 16 penetrates the outer surface of the driving shaft 202 .

[0056] The connecting plate 16 is fixed to the outer side of the bottom support frame 101 and connected to the protective cover 6. The connecting plate 16 can provide auxiliary support for the driving shaft 202, so that the driving gear plate 3 can rotate more stably.

[0057] Through the above technical scheme, 1. by supporting the telescopic component 8 above the cross bar 7, when the mounting frame 1 is driven to move by the propulsion equipment, its driving device 2 drives the toothed disc 3 to rotate and dig, and after starting the telescopic component 8, it repeatedly telescopes and pushes the connecting block 9 and the pushing plate 11 to extend on the inner side of the protective cover 6, so that the pushing plate 11 can repeatedly extend to the inner side of the toothed plate 4 to push out the soil blocks excavated and accumulated inside it, and when the toothed plate 4 continues to rotate, the pushing plate 11 generates thrust and has an elastic supporting effect on it according to the telescopic properties of the connecting spring 10, so that when it is driven to be recovered by the telescopic component 8, its supporting state can be flexibly changed, and thus it will not hinder the continued rotation process of the toothed plate 4, so that the soil blocks can be repeatedly cleaned out, and the soil blocks generated during the excavation process can be prevented from continuing to fall. Falling into the trench affects the excavation quality and operation efficiency of the cable trench; 2. The cylinder 802 is supported on the outside of the cross bar 7 by the mounting seat 801. When the cylinder 802 is started, it drives the telescopic shaft 803 to extend and retract, thereby pushing the connecting block 9 and the pushing plate 11 to extend inside the protective cover 6, thereby providing driving force for cleaning the soil blocks inside the tooth plate 4. By sleeve-connecting the connecting sleeve 1203 on the outer surface of the cross bar 7, when the hydraulic cylinder 1201 is started, it can drive the hydraulic rod 1202 to extend and retract to generate thrust or pulling force on the cross bar 7, so as to drive the bottom support frame 101 to flip slightly, raise or lower its height from the ground, and at the same time cooperate with the adjustment of the excavation depth of the toothed disc 3, so as to enhance the flexibility and convenience of the bottom support frame 101 and the toothed disc 3 when used in combination.

[0058] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0059] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A cable trench excavation device, comprising a mounting frame (1), characterized in that: The inner wall of the mounting frame (1) is provided with a driving device (2), the output end of the driving device (2) is provided with a toothed disc (3), the outer surface of the toothed disc (3) is provided with a toothed plate (4), the outer surface of the mounting frame (1) is slidably connected with a supporting assembly (5), the outer surface of the mounting frame (1) is provided with a protective cover (6), the inner wall of the mounting frame (1) is fixedly provided with a cross bar (7), the top of the cross bar (7) is provided with a telescopic assembly (8), the output end of the telescopic assembly (8) is fixedly connected with a connecting block (9), one end of the connecting block (9) is fixedly connected with a connecting spring (10), and one end of the connecting spring (10) is fixedly provided with a pushing plate (11).

2. A cable trench digging device according to claim 1, characterized in that: The mounting frame (1) comprises a bottom support frame (101), the outer surface of the bottom support frame (101) is rotatably connected to a mounting plate (102), and the outer surface of the crossbar (7) is provided with a stretching device (12).

3. A cable trench digging device according to claim 1, characterized in that: The driving device (2) comprises a driving motor (201), the output end of the driving motor (201) is provided with a driving shaft (202), and the outer surface of the driving shaft (202) is provided with a bearing seat (203).

4. A cable trench digging device according to claim 2, characterized in that: The support assembly (5) comprises a support column (501), a spring column (502) is fixedly installed inside the support column (501), a connecting seat (503) is fixedly installed at the bottom of the spring column (502), a roller (504) is rotatably installed on the inner wall of the connecting seat (503), and the support column (501) is slidably connected to the outer surface of the bottom support frame (101).

5. A cable trench digging device according to claim 4, characterized in that: The outer surface of the bottom support frame (101) is provided with a side plate (103), the inner wall of the side plate (103) is provided with a slide groove (104), the outer surface of the side plate (103) is fixedly mounted with a threaded plate (13), the inner wall of the threaded plate (13) is threadedly connected with an adjusting screw (14), and the bottom of the adjusting screw (14) passes through and is threadedly connected to the inside of the support column (501).

6. A cable trench digging device according to claim 1, characterized in that: The telescopic assembly (8) comprises a mounting seat (801), the mounting seat (801) is sleeved on the outer surface of the cross bar (7), a cylinder (802) is fixedly mounted on the top of the mounting seat (801), a telescopic shaft (803) is provided at the output end of the cylinder (802), and the output end of the telescopic shaft (803) passes through the interior of the protective cover (6) and is fixedly connected to the connecting block (9).

7. A cable trench digging device according to claim 2, characterized in that: The stretching device (12) comprises a hydraulic cylinder (1201), the output end of the hydraulic cylinder (1201) is provided with a hydraulic rod (1202), the output end of the hydraulic rod (1202) is fixedly mounted with a connecting sleeve (1203), and the connecting sleeve (1203) is sleeved on the outer surface of the cross bar (7).

8. A cable trench digging device according to claim 7, characterized in that: There are two groups of hydraulic cylinders (1201) and hydraulic rods (1202), and one end of the two groups of hydraulic cylinders (1201) is fixedly mounted with a mounting sleeve (1204).

9. A cable trench digging device according to claim 1, characterized in that: The outer surface of the protective cover (6) is provided with a through pipe (15), and the through pipe (15) is coaxially arranged with the telescopic shaft (803).

10. A cable trench digging device according to claim 5, characterized in that: A connecting support plate (16) is fixedly mounted on one side of the bottom support frame (101), and the connecting support plate (16) penetrates the outer surface of the driving shaft (202).

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