Chain adjusting mechanism of ditcher

Abstract

The utility model discloses a chain adjusting mechanism of a ditcher, which comprises a rack, a fixing frame, a linear driving device and a guide rail, the rack is rotatably connected with an output shaft, and the output shaft is fixedly connected with a driving wheel; the fixing frame is fixedly connected to the rack, the fixing frame is longitudinally arranged, and a longitudinally-arranged containing cavity with an opening in the front end is formed in the fixing frame; the linear driving device is fixedly installed in the containing cavity, the guide rail is arranged in the containing cavity in a sliding mode, the rear end of the guide rail is connected with the output end of the linear driving device, the front end of the guide rail extends out of the containing cavity and is rotatably provided with a driven wheel, a chain is wound around the driving wheel and the driven wheel, and a blade is arranged on the chain. The linear driving device is connected between the fixing frame and the guide rail, the linear driving device can drive the guide rail to stretch out and draw back along the fixing frame, the capacity of adjusting tensioning of the chain is achieved, adjustment is easy, and too large force is not needed.

Description

Technical Field

[0001] This utility model relates to the technical field of trenching machines, and in particular to a chain adjustment mechanism for a trenching machine. Background Technology

[0002] A trenching machine, also known as a ditcher, is used to dig ditches in muddy soil. A chain trenching machine includes a base plate on one side, with a rotating shaft rotatably connected to the base plate. The shaft has a drive wheel mounted on it, and a guide rail. One end of the guide rail is located at the sprocket, and the other end has a driven wheel. A chain is fitted onto the drive wheel and the driven wheel. Blades are mounted on the chain. In operation, the shaft and drive wheel rotate together, driving the chain to rotate. The end of the chain near the driven wheel penetrates into the soil, and as the chain rotates, it excavates the soil. In traditional trenching machines, the extension length of the guide rail is adjusted by rotating a bolt to tension the chain. For larger trenching machines, this is laborious. Furthermore, the tensioning bolt is located outside the guide rail, making it susceptible to contamination by soil or impurities, and also affecting the overall aesthetics. Therefore, an improvement is needed. Utility Model Content

[0003] The purpose of this invention is to provide a chain adjustment mechanism for a trenching machine, which connects a linear drive device between the fixed frame and the guide rail. The linear drive device can drive the guide rail to extend and retract along the fixed frame, thereby adjusting the chain tension. The adjustment is simple and does not require much force.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a chain adjustment mechanism for a trenching machine, comprising...

[0005] A frame, on which an output shaft is rotatably connected, and on which a drive wheel is fixedly connected;

[0006] A fixed frame is fixedly connected to the machine frame. The fixed frame is arranged longitudinally and has a receiving cavity with an opening at the front end and arranged longitudinally.

[0007] The linear drive unit is fixedly installed inside the receiving cavity.

[0008] The guide rail is slidably disposed in the receiving cavity. The rear end of the guide rail is connected to the output end of the linear drive device. The front end of the guide rail extends out of the receiving cavity and is rotatably mounted with a driven wheel. A chain is wound around the driving wheel and the driven wheel, and a blade is disposed on the chain.

[0009] Furthermore, the shape of the rear end of the guide rail matches the shape of the receiving cavity, so that the guide rail is slidably disposed within the receiving cavity.

[0010] Furthermore, the fixing frame includes an upper plate, a lower plate, and two side plates, which together form a receiving cavity with a front opening, and a pipeline channel is provided on one of the side plates.

[0011] Furthermore, the linear drive device is a grease cylinder.

[0012] Furthermore, a locking structure is provided between the fixing frame and the guide rail. The locking structure includes a locking screw and a threaded connector. The guide rail is provided with a through hole for the locking screw to pass through. The two sides of the fixing frame are provided with longitudinally arranged strip guide grooves. The locking screw passes through the strip guide grooves and the through hole and is connected to the threaded connector to lock the guide rail and the fixing frame.

[0013] Furthermore, one end of the locking screw is provided with a limiting part, which is connected to the locking screw through a threaded connector to lock the guide rail and the fixing frame between the threaded connector and the limiting part.

[0014] Furthermore, the locking screws are provided in multiple sets and vertically spaced apart. One end of the locking screw is provided with a limiting part, and the other end of the locking screw is provided with a washer. The guide rail and the fixing frame are locked between the threaded connector and the locking screw through the threaded connector.

[0015] Furthermore, the two threaded connectors at one end of the two locking screws are integral parts, so that the same end of the two locking screws is connected to the same integral part respectively.

[0016] Furthermore, the rear end of the guide rail is provided with an abutment plate, and the linear drive device is fixedly connected to the abutment plate.

[0017] Furthermore, the rear end of the guide rail is provided with a reinforcing plate to enhance the stability of the connection between the abutment plate and the guide rail.

[0018] In summary, this utility model has the following beneficial effects:

[0019] 1. The chain adjustment mechanism of the trenching machine of this utility model connects a linear drive device between the fixed frame and the guide rail. The linear drive device can drive the guide rail to extend and retract along the fixed frame, thereby adjusting the chain tension. The adjustment is simple and does not require much force.

[0020] 2. This utility model connects a grease cylinder between the fixed frame and the guide rail, allowing grease to be directly applied to the grease nozzle using the excavator's grease gun, causing the piston rod to extend and push the guide rail outward, thereby adjusting the chain tension. No additional hydraulic station is required, effectively reducing costs.

[0021] 3. This utility model has a locking structure between the fixed frame and the guide rail, which can effectively keep the fixed frame and the guide rail in a locked state and improve the stability of the chain when it is tensioned. Attached Figure Description

[0022] Figure 1 This is a first-view structural schematic diagram of the present invention.

[0023] Figure 2 This is a structural schematic diagram of the present invention from a second perspective.

[0024] Figure 3 This is a schematic diagram of the installation structure of the linear drive device of this utility model.

[0025] Figure 4 This is a schematic diagram of the installation structure of the abutment plate of this utility model.

[0026] Figure 5 This is a schematic diagram of the rear end of the guide rail of this utility model.

[0027] In the diagram: 10. Frame; 11. Output shaft; 12. Drive wheel; 13. Drive element; 20. Fixing frame; 21. Receiving cavity; 22. Pipeline channel; 23. Strip guide groove; 30. Linear drive device; 40. Guide rail; 41. Through hole; 42. Abutment plate; 43. Reinforcing plate; 50. Driven wheel; 60. Chain; 70. Locking structure; 71. Locking screw; 711. Limiting part; 72. Threaded connector; 73. Gasket. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings.

[0029] like Figures 1-5 As shown, a chain adjustment mechanism for a trenching machine includes a frame 10, a fixed frame 20, a linear drive device 30, a guide rail 40, a drive wheel 12, a driven wheel 50, and a chain 60. The above constitute the basic structure of this utility model. The drive wheel 12 includes, but is not limited to, a sprocket, and similarly, the driven wheel 50 includes, but is not limited to, a sprocket and a roller.

[0030] An output shaft 11 is rotatably connected to a frame 10. A drive element 13 is provided on the frame 10 to drive the output shaft 11. A drive wheel 12 is fixedly connected to the output shaft 11. A fixed frame 20 is fixedly connected to the frame 10. The fixed frame 20 is arranged longitudinally. The longitudinal direction of this utility model is the front-to-back direction. The fixed frame 20 has a receiving cavity 21 with a front opening and arranged longitudinally. A linear drive device 30 is fixedly installed in the receiving cavity 21. For example, the linear drive device 30 is fixedly connected to the fixed frame 20 by fasteners. The linear drive device 30 is hidden in the receiving cavity 21, which serves to prevent dust and avoid contamination by mud. On the other hand, it does not affect the overall appearance. A control module is provided on the frame 10 to control the output distance of the linear drive device 30.

[0031] The guide rail 40 is slidably disposed in the receiving cavity 21. The rear end of the guide rail 40 abuts against the output end of the linear drive device 30. The front end of the guide rail 40 extends out of the receiving cavity 21 and is rotatably mounted with a driven wheel 50. A chain 60 is wound around the driving wheel 12 and the driven wheel 50, and a blade is disposed on the chain 60.

[0032] The chain 60 adjustment mechanism of the trenching machine of this utility model connects a linear drive device 30 between the fixed frame 20 and the guide rail 40. The linear drive device 30 can drive the guide rail 40 to extend and retract along the fixed frame 20, thereby adjusting the tension of the chain 60. The adjustment is simple and does not require much force.

[0033] In some embodiments, the shape of the rear end of the guide rail 40 matches the shape of the receiving cavity 21, so that the guide rail 40 is slidably disposed within the receiving cavity 21. Specifically, the fixing frame 20 is a rectangular structure or a similar rectangular structure, the receiving cavity 21 is a rectangular structure, and the shape of the guide rail 40 matches the receiving cavity 21.

[0034] In some embodiments, the mounting bracket 20 includes an upper plate, a lower plate, and two side plates, which together form a receiving cavity 21 with a front opening. One of the side plates is provided with a pipeline channel 22, which is used to provide a connecting pipe or / and cable for the linear drive device 30 to pass through.

[0035] In some embodiments, the linear drive device 30 includes, but is not limited to, linear drive elements 13 such as grease cylinders, hydraulic cylinders, and electric cylinders, with the grease cylinder being the preferred linear drive device 30. This invention connects a grease cylinder between the fixed frame 20 and the guide rail 40, allowing direct application of grease from the excavator's grease gun to the grease nozzle of the grease cylinder. This causes the piston rod of the grease cylinder to extend and push the guide rail 40 outward, thereby adjusting the tension of the chain 60. No additional hydraulic station is required, effectively reducing costs. It should be understood that trenchers are typically mounted at the front of excavators. A trencher is a mechanical device specifically designed for digging trenches and is usually mounted at the front of an excavator to replace a traditional bucket; therefore, using a grease cylinder effectively reduces costs.

[0036] In some embodiments, a locking structure 70 is further provided between the fixing frame 20 and the guide rail 40. The locking structure 70 includes a locking screw 71 and a threaded connector 72. The guide rail 40 is provided with a through hole 41 for the locking screw 71 to pass through. The fixing frame 20 has longitudinally arranged strip-shaped guide grooves 23 on both sides. The locking screw 71 passes through the strip-shaped guide grooves 23 and the through hole 41 and is connected to the threaded connector 72 to lock the guide rail 40 and the fixing frame 20. The present invention provides a locking structure 70 between the fixing frame 20 and the guide rail 40, which can effectively keep the fixing frame 20 and the guide rail 40 in a locked state and improve the stability of the chain 60 when tensioned.

[0037] In some embodiments, a limiting portion 711 is provided at one end of the locking screw 71. In this embodiment, the limiting portion 711 may be a nut formed on the end of the locking screw 71. In order to increase the contact area and thus improve the locking effect, a washer 73 may be provided between the limiting portion 711 and the fixing frame 20. The guide rail 40 and the fixing frame 20 are locked between the threaded connector 72 and the limiting portion 711 by the threaded connector 72 and the locking screw 71. Specifically, the guide rail 40 and the fixing frame 20 are locked between the threaded connector 72 and the washer 73.

[0038] In some embodiments, multiple sets of locking screws 71 are provided and vertically spaced apart. One end of the locking screw 71 is provided with a limiting part 711, and the other end of the locking screw 71 is respectively connected to a threaded connector 72. The threaded connector 72 is engaged with the locking screw 71 to lock the guide rail 40 and the fixing frame 20 between the gasket 73 and the limiting part 711. By providing two sets, the stability and firmness of the guide rail 40 and the fixing frame 20 when locked can be effectively improved.

[0039] In some embodiments, the two threaded connectors 72 at one end of the two locking screws 71 are an integral part, so that the same end of the two locking screws 71 is respectively connected to the same integral part. Specifically, the two threaded connectors 72 on the same side of the two locking screws 71 are the same limiting plate, and two threaded holes for threaded connection with the locking screws 71 are opened on the limiting plate.

[0040] In some embodiments, the rear end of the guide rail 40 is provided with an abutment plate 42, and the output end of the linear drive device 30 abuts against the abutment plate 42. Further, the rear end of the guide rail 40 is provided with a reinforcing plate 43 to enhance the connection stability between the abutment plate 42 and the guide rail 40. Specifically, there are two reinforcing plates 43: an upper reinforcing plate 43 and a lower reinforcing plate 43. The upper reinforcing plate 43 is inclinedly disposed within the guide rail 40 and connected to the upper end of the abutment plate 42, while the lower reinforcing plate is inclinedly disposed within the guide rail 40 and connected to the lower end of the abutment plate 42. The reinforcement plates 43 effectively improve the connection stability of the abutment plate 42.

[0041] When a grease cylinder is selected for the linear drive unit 30, if the chain 60 needs to be replaced, the threaded connector 72 of the locking structure 70 is loosened and the valve of the grease cylinder is opened. The pressure of the chain 60 on the driven wheel 50 is used to squeeze the output end of the grease cylinder inward, thereby shortening the distance between the driving wheel 12 and the driven wheel 50. At this time, the chain 60 can be removed from the driving wheel 12 and the driven wheel 50. Then, the required chain 60 is installed on the driving wheel 12 and the driven wheel 50. At this time, the grease cylinder extends to increase the distance of the guide rail 40 extending out of the receiving cavity 21, thereby lengthening the distance between the driving wheel 12 and the driven wheel 50. The tension of the chain 60 is adjusted. Finally, the threaded connector 72 is tightened to lock the guide rail 40 and the fixed frame 20.

[0042] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A chain adjustment mechanism for a trenching machine, characterized in that: include A frame (10) is provided, on which an output shaft (11) is rotatably connected, and a drive wheel (12) is fixedly connected to the output shaft (11). A fixed frame (20) is fixedly connected to the frame (10). The fixed frame (20) is arranged longitudinally and has a receiving cavity (21) with an opening at the front end and arranged longitudinally. A linear drive unit (30) is fixedly installed inside the receiving cavity (21). The guide rail (40) is slidably disposed in the receiving cavity (21). The rear end of the guide rail (40) is connected to the output end of the linear drive device (30). The front end of the guide rail (40) extends out of the receiving cavity (21) and is rotatably mounted with a driven wheel (50). A chain (60) is wound around the driving wheel (12) and the driven wheel (50), and a blade is disposed on the chain (60).

2. The chain adjustment mechanism of a trencher according to claim 1, characterized in that: The shape of the rear end of the guide rail (40) matches the shape of the receiving cavity (21), so that the guide rail (40) is slidably disposed within the receiving cavity (21).

3. The chain adjustment mechanism of a trencher according to claim 1, characterized in that: The fixing frame (20) includes an upper plate, a lower plate and two side plates. The upper plate, lower plate and two side plates surround and form a receiving cavity (21) with an opening at the front end. A pipeline channel (22) is provided on one of the side plates.

4. The chain adjustment mechanism of a trencher according to claim 1, characterized in that: The linear drive device (30) is a grease cylinder.

5. A chain adjustment mechanism for a trencher according to any one of claims 1-4, characterized in that: A locking structure (70) is also provided between the fixing frame (20) and the guide rail (40). The locking structure (70) includes a locking screw (71) and a threaded connector (72). The guide rail (40) is provided with a through hole (41) through which the locking screw (71) passes. The fixing frame (20) is provided with longitudinally arranged strip guide grooves (23) on both sides. The locking screw (71) passes through the strip guide groove (23) and the through hole (41) and is connected to the threaded connector (72) to lock the guide rail (40) and the fixing frame (20).

6. The chain adjustment mechanism of a trencher according to claim 5, characterized in that: One end of the locking screw (71) is provided with a limiting part (711), and the threaded connector (72) is connected to the locking screw (71) to lock the guide rail (40) and the fixing frame (20) between the threaded connector (72) and the limiting part (711).

7. The chain adjustment mechanism of a trencher according to claim 5, characterized in that: The locking screws (71) are provided in multiple sets and are arranged vertically at intervals. One end of the locking screw (71) is provided with a limiting part (711), and the other end of the locking screw (71) is respectively connected to a threaded connector (72). The threaded connector (72) is connected to the locking screw (71) to lock the guide rail (40) and the fixing frame (20) between the threaded connector (72) and the limiting part (711).

8. The chain adjustment mechanism of a trencher according to claim 7, characterized in that: The two threaded connectors (72) at one end of the two locking screws (71) are integral parts, so that the same end of the two locking screws (71) is connected to the same integral part respectively.

9. The chain adjustment mechanism of a trencher according to claim 1, characterized in that: The rear end of the guide rail (40) is provided with an abutment plate (42), and the linear drive device (30) is fixedly connected to the abutment plate (42).

10. The chain adjustment mechanism of a trencher according to claim 9, characterized in that: The rear end of the guide rail (40) is provided with a reinforcing plate (43) to enhance the stability of the connection between the abutment plate (42) and the guide rail (40).

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