A furrowing mechanism for a furrower

Abstract

The utility model belongs to ditching machine technical field, concretely relates to a ditching mechanism of ditching machine, including frame, and the diesel power assembly of frame installation is driven connection overload protection mechanism through belt transmission mechanism, and the overload protection mechanism includes shell body no.

Description

Technical Field

[0001] This utility model belongs to the field of trenching machine technology, specifically relating to a trenching mechanism for a trenching machine. Background Technology

[0002] In agricultural planting, municipal engineering, and other scenarios, trenching machines have become core operating equipment due to their efficient soil breaking and trench forming capabilities. As the core actuator of the trenching machine, the trenching mechanism's power transmission stability and overload protection performance directly determine the operating efficiency and equipment lifespan. Currently, most mainstream trenching machines use friction plate overload clutches for overload protection. The core structure of a traditional friction plate overload clutch includes a driving disc, a driven disc, friction plates, a pressure adjusting spring, and a housing. The driving disc is fixed to the power input end and rotates synchronously with the power source; the driven disc is fixed to the power output end and is responsible for transmitting power to the trenching wheel; the friction plates are clamped between the driving and driven discs, transmitting power through friction; the pressure adjusting spring applies axial pressure to the driving disc through a spring seat, ensuring tight contact between the friction plates, and the magnitude of this pressure determines the maximum torque the clutch can transmit. Its power cut-off principle is as follows: During normal operation, the pressure of the adjusting spring makes the friction plate fit tightly with the driving and driven discs. The driving disc drives the driven disc to rotate synchronously through static friction, and the power is stably transmitted to the trenching wheel. When the trenching wheel encounters obstacles such as stones or tree roots, the trenching resistance increases sharply. When the torque of the reaction force on the driven disc exceeds the maximum torque that the friction plate can transmit (set by the pressure of the adjusting spring), the static friction is broken and turns into sliding friction. The driving disc continues to rotate with the power source, but the driven disc stops or slows down due to excessive resistance. The two continuously slip relative to each other. At this time, the power transmission is interrupted, which theoretically can prevent the trenching wheel, drive shaft and other components from being damaged due to overload. Based on the above principles, traditional friction plate overload clutches have the following problems in actual trenching machine operation: In trenching machine operation scenarios, obstacles are scattered and frequently appear, causing the overload clutch to frequently trigger slippage. Each time slippage occurs, the driving plate and driven plate drive the friction plate surface to slide at high speed, causing the friction plate surface temperature to rise sharply and the friction material to wear rapidly. In addition, some small resistance impacts can cause the clutch to slip frequently—the friction plates are not completely separated, and only a brief and slight relative sliding occurs. Although this sliding does not completely cut off the power, it will aggravate the fatigue wear of the friction plates, causing the friction plate thickness to decrease rapidly, requiring frequent disassembly and replacement. This not only increases maintenance costs but also interrupts the operation process and reduces trenching efficiency. Furthermore, incomplete power cut-off still poses a risk of component damage: When a traditional clutch slips, there is still some friction between the friction plate and the driving and driven plates, resulting in incomplete power cut-off. The rotation of the driving plate will cause the driven plate to "creep at low speed" through residual friction, causing the trenching wheel to continuously contact the obstacle, resulting in chipping of the trenching wheel blades and slight deformation of the drive shaft. Long-term accumulation will lead to component scrapping. In summary, there is an urgent need in the field of trenching mechanisms for trenching machines for a new type of overload protection structure that can overcome the core defect of sliding friction loss in traditional friction plate overload clutches. Utility Model Content

[0003] To address the above problems, the purpose of this utility model is to provide a trenching mechanism for a trenching machine, thereby solving the core defect of sliding friction loss in the existing trenching mechanism of the friction plate type overload clutch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a trenching mechanism for a trencher, comprising a frame, on which wheels are rotatably mounted and a diesel power assembly is fixedly mounted. The diesel power assembly is driven by a belt drive mechanism connected to an overload protection mechanism. The belt drive mechanism is mounted on a connecting arm, which is rotatably mounted on the output shaft of the diesel power assembly. The output shaft of the diesel power assembly is rotatably mounted on the frame, and the end of the connecting arm away from the overload protection mechanism is rotatably connected to an angle adjustment frame via a pin. The overload protection mechanism includes a housing, which is mounted on the connecting arm. The outer casing is fixedly provided with a first support seat and a second support seat. A bushing is rotatably fitted in the first support seat. A helical gear is fixedly provided on the outside of the bushing. A friction wheel is fixedly provided at one end of the helical gear. The bushing and the second support seat are slidably and rotatably connected to the two ends of a worm. The worm is meshed with a worm wheel. A grooved wheel is fixedly provided on the shaft of the worm wheel. A spring is fitted on the worm's shaft between the worm's teeth and the first support seat. A friction wheel is fixedly provided on the worm's shaft on the other side of the first support seat. The helical gear is meshed with the second helical gear. The second helical gear is coaxially installed with the driven pulley in the belt drive mechanism.

[0005] The beneficial effects of this utility model are as follows: when the resistance of the groove-opening wheel rotation is too large, compared with the use of an overload clutch, the use of an overload protection mechanism can ensure rapid and reliable power cut-off to protect the groove-opening wheel and drive mechanism, while avoiding the friction plates from maintaining sliding friction for a long time and thus avoiding rapid wear, effectively extending the maintenance cycle of the device and reducing the maintenance difficulty of the device.

[0006] To ensure the stability of the operation of each mechanism in the overload protection system; As a further improvement to the above technical solution: the outer shell is a shell-shaped structure, and the open end of the outer shell is connected to another shell-shaped structure, the second outer shell, by bolts. The remaining components of the overload protection mechanism are all located inside the sealed shell formed by the outer shell and the second outer shell.

[0007] The beneficial effects of this improvement are: outer shell 1 and outer shell 2 can effectively isolate and protect the moving parts in the overload protection mechanism, and prevent dirt and other impurities in the working environment from adhering to the gears and other mechanisms, thus affecting the normal operation of the overload protection mechanism.

[0008] In order to effectively ensure the stability of power transmission between friction wheel one and friction wheel two; As a further improvement to the above technical solution: the end of the second friction wheel facing the first friction wheel has a tapered structure that gradually narrows, and the end of the first friction wheel that connects with the second friction wheel is formed with a tapered groove structure that fits and conforms to the surface of the second friction wheel.

[0009] The beneficial effects of this improvement are: the conical surface design can effectively increase the area of ​​the friction contact surface between friction wheel one and friction wheel two, thereby ensuring the stability of power transmission between friction wheel one and friction wheel two.

[0010] To ensure the smooth rotation of the worm gear; As a further improvement to the above technical solution: the two ends of the spring respectively abut against the end face of an end face bearing, and the end face bearing is fitted onto the worm gear body. An end face bearing is fitted onto the worm gear body between the worm gear teeth and the support seat.

[0011] The beneficial effects of this improvement are: the use of end face bearings can avoid static friction between the worm gear and the spring, support seat 2, and support seat 1 during the rotation process, thus avoiding affecting the smoothness of rotation.

[0012] To facilitate the adjustment of the trenching wheel height using the angle adjustment frame; As a further improvement to the above technical solution: the angle adjustment frame includes an inner tube, the bottom end of which is fixed to the frame, an outer tube is slidably fitted on the outside of the inner tube, a lead screw is rotatably mounted on the outer tube, a handwheel is fixed at the top of the lead screw on the outside of the outer tube, an internal threaded hole for threaded connection of the lead screw is provided on the inner tube, one end of the connecting rod is rotatably connected to the outer tube via a pin, and the other end of the connecting rod is rotatably connected to the connecting arm via a pin.

[0013] The beneficial effects of this improvement are as follows: by rotating the screw of the outer tube body, the outer tube body is driven to slide on the outside of the inner tube body through the screw pair mechanism, thereby causing the outer tube body to pull the connecting arm to rotate on the frame through the connecting rod, so as to conveniently adjust the working height of the grooved wheel installed at one end of the connecting arm.

[0014] To ensure the stability of the angle adjustment bracket's support for the connecting arm; As a further improvement to the above technical solution: the lead screw is a trapezoidal lead screw structure.

[0015] The beneficial effect of this improvement is that the self-locking property of the trapezoidal lead screw can effectively ensure the stability of the angle adjustment frame supporting the connecting arm.

[0016] To ensure the stability of power transmission between the diesel powertrain and the overload protection mechanism; As a further improvement to the above technical solution: the driving pulley in the belt drive mechanism is fixed on the output shaft of the diesel powertrain, and the shaft of the driven pulley in the belt drive mechanism is rotatably mounted on the connecting arm.

[0017] The beneficial effect of this improvement is that the diesel powertrain can stably transmit power to the overload protection mechanism through the belt drive mechanism.

[0018] The parts of the device not covered herein are the same as or can be implemented using existing technologies. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic diagram of the overload protection mechanism in this utility model; Figure 4 This is a diagram showing the internal structure of the overload protection mechanism in this utility model; In the diagram: 1. Frame; 2. Wheel; 3. Diesel powertrain; 4. Belt drive mechanism; 5. Connecting arm; 6. Overload protection mechanism; 61. Outer shell one; 62. Outer shell two; 63. Support seat one; 64. Support seat two; 65. Worm gear; 66. Worm; 67. Spring; 68. Bushing; 69. Helical gear one; 70. Friction wheel one; 71. Friction wheel two; 72. Helical gear two; 73. End face bearing; 74. Output shaft; 7. Grooving wheel; 8. Angle adjustment frame; 81. Inner tube; 82. Outer tube; 83. Lead screw; 84. Handwheel; 85. Connecting rod. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings. The description in this part is only exemplary and explanatory, and should not be used to limit the scope of protection of the present invention in any way.

[0021] Example 1: As Figure 1As shown in Figure 4: A trenching mechanism for a trencher includes a frame 1. Wheels 2 are rotatably mounted on the frame 1, and a diesel power assembly 3 is fixedly mounted thereon. The diesel power assembly 3 is driven by a belt drive mechanism 4 to connect to an overload protection mechanism 6. The belt drive mechanism 4 is mounted on a connecting arm 5, which is rotatably mounted on the output shaft of the diesel power assembly 3. The output shaft of the diesel power assembly 3 is rotatably mounted on the frame 1. One end of the connecting arm 5 away from the overload protection mechanism 6 is rotatably connected to an angle adjustment frame 8 via a pin. The overload protection mechanism 6 includes a first outer shell 61, which is mounted on the connecting arm 5. A first support seat 63 and a second support seat 64 are fixedly mounted on the first outer shell 61. A bushing 68 is rotatably mounted in support seat 63. A helical gear 69 is fixed to the outside of the bushing 68. A friction wheel 70 is fixed to one end of the helical gear 69. The bushing 68 and support seat 64 are slidably and rotatably connected to the two ends of the worm 66. The worm 66 is meshed with a worm wheel 65. A grooved wheel 7 is fixed on the shaft of the worm wheel 65. A spring 67 is fitted on the worm 66 between the teeth of the worm 66 and support seat 63. A friction wheel 71 is fixed on the worm 66 on the other side of support seat 63. The helical gear 69 is meshed with a helical gear 72. The helical gear 72 is coaxially mounted with the driven pulley in the belt drive mechanism 4. The resistance to the rotation of the grooved wheel 7 is... When the load is too high, compared to using an overload clutch, using an overload protection mechanism 6 can ensure rapid and reliable power cut-off to protect the trenching wheel 7 and drive mechanism, while avoiding the friction plates from maintaining sliding friction for a long time and causing rapid wear. This effectively extends the maintenance cycle of the device and reduces the difficulty of maintenance. The outer shell 61 has a shell-like structure, and the open end of the outer shell 61 is connected to another shell-like outer shell 62 by bolts. The remaining components in the overload protection mechanism 6 are all located inside the sealed shell formed by the outer shell 61 and the outer shell 62. The outer shell 61 and the outer shell 62 can effectively isolate and protect the moving parts in the overload protection mechanism 6, preventing dirt and other impurities in the working environment from adhering to them. The friction wheel 71, when placed on gears or other mechanisms, affects the normal operation of the overload protection mechanism 6. The end of the friction wheel 71 facing the friction wheel 70 has a tapered structure that gradually narrows. The end of the friction wheel 70 that connects to the friction wheel 71 has a tapered groove structure that fits and conforms to the surface of the friction wheel 71. The tapered surface design effectively increases the friction contact area between the friction wheel 70 and the friction wheel 71, thereby ensuring the stability of power transmission between the friction wheel 70 and the friction wheel 71. The two ends of the spring 67 respectively abut against the end face of an end face bearing 73, and the end face bearing 73 is mounted on the shaft of the worm 66. An end face bearing 73 is mounted on the shaft between the teeth of the worm 66 and the support seat 64.The use of end face bearing 73 can avoid static friction between the worm gear 66 and spring 67, support seat 2 64, and support seat 1 63 during rotation, thus preventing the smoothness of rotation. The angle adjustment frame 8 includes an inner tube 81, the bottom end of which is fixed to the frame 1. An outer tube 82 is slidably fitted on the outside of the inner tube 81. A lead screw 83 is rotatably mounted on the outer tube 82. A handwheel 84 is fixed at the top of the lead screw 83 located on the outside of the outer tube 82. An internal threaded hole for threaded connection of the lead screw 83 is opened on the inner tube 81. One end of the connecting rod 85 is rotatably connected to the outer tube 82 by a pin. The other end of the connecting rod 85 is rotatably connected to the connecting arm 5 by a pin. The outer tube 82 rotates via the screw 83, which drives the outer tube 82 to slide outside the inner tube 81 through a screw pair mechanism. This causes the outer tube 82 to pull the connecting arm 5 to rotate on the frame 1 via the connecting rod 85, facilitating the adjustment of the working height of the grooved wheel 7 mounted at one end of the connecting arm 5. The screw 83 is a trapezoidal screw structure, and its self-locking property effectively ensures the stability of the angle adjustment frame 8's support for the connecting arm 5. The driving pulley in the belt drive mechanism 4 is fixed to the output shaft of the diesel powertrain 3, and the driven pulley in the belt drive mechanism 4 is rotatably mounted on the connecting arm 5. The diesel powertrain 3 can stably transmit power to the overload protection mechanism 6 through the belt drive mechanism 4.

[0022] The beneficial effects of this utility model are as follows: When the resistance of the grooved wheel 7 rotation is too large, compared with the use of an overload clutch, the use of the overload protection mechanism 6 can ensure the rapid and reliable power cut-off protection of the grooved wheel 7 and the drive mechanism, while avoiding the friction plate from maintaining sliding friction for a long time and being rapidly worn, effectively extending the maintenance cycle of the device and reducing the maintenance difficulty of the device.

[0023] The working principle of this technical solution is as follows: According to the operation requirements, the soil penetration depth of the trenching wheel 7 is adjusted by the angle adjustment frame 8: turn the handwheel 84: at this time, a helical pair motion is generated between the lead screw 83 and the internal thread hole of the inner tube body 81, the outer tube body 82 slides along the outside of the inner tube body 81, and the outer tube body 82 pulls the connecting arm 5 to rotate around the output shaft of the diesel power assembly 3 through the connecting rod 85. The overload protection mechanism 6 and the trenching wheel 7 installed at the other end of the connecting arm 5 are then adjusted to the appropriate soil penetration depth. After the depth adjustment is completed, the diesel powertrain 3 is started. The output shaft of the diesel powertrain 3 drives the drive pulley to rotate. The drive pulley drives the driven pulley through the V-belt. The helical gear 72, which is coaxial with the driven pulley, rotates synchronously. The helical gear 72 meshes with the helical gear 69, which drives the bushing 68 to rotate in the support seat 63. At this time, the preload of the spring 67 in the overload protection mechanism 6 makes the friction wheel 70 and the friction wheel 71 fit tightly together. The friction wheel 70 drives the friction wheel 71 and the worm 66 to rotate through friction. The worm 66 meshes with the worm wheel 65, and the worm wheel 65 drives the trenching wheel 7 to rotate at high speed. The operator pushes the frame 1 to make the trencher move forward along the preset trenching route to carry out trenching work. When the trenching wheel 7 contacts an obstacle, the cutting resistance increases sharply, and the reaction torque on the worm gear 65 increases. This torque is transmitted to the worm 66. When the torque exceeds the threshold set by the preload of the spring 67, the worm 66 overcomes the elastic force of the spring 67 and slides axially toward the support seat 2 64. The rotational power transmission of the worm pair is converted into the axial sliding of the helical pair. The sliding of the worm 66 causes the friction wheel 2 71 to quickly separate from the friction wheel 1 70, interrupting the power transmission. The trenching wheel 7 stops rotating, preventing the trenching wheel blade from breaking or the worm 66 and worm gear 65 from being damaged. At this time, the operator can observe that the trenching wheel 7 has stopped rotating and needs to immediately turn off the throttle of the diesel power assembly 3. Depending on the type of obstacle, if it is a rock, remove it manually; if it is a tree root, cut it with a tool and clear it to ensure that the obstacle is completely removed from the working range of the trenching wheel 7. After clearing, restart the diesel power unit 3. The worm gear 66 is reset under the elastic force of the spring 67, the friction wheel 2 71 and the friction wheel 1 70 re-fit, the power transmission is restored, the trenching wheel 7 rotates again, and pushes the trencher to continue working along the original route.

[0024] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only for the purpose of helping to understand the method and core ideas of the present invention. The above descriptions are only preferred embodiments of the present invention. It should be noted that due to the limitations of textual expression, there are objectively infinite specific structures. For those skilled in the art, several improvements, modifications, or changes can be made without departing from the principles of the present invention, and the above technical features can also be combined in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of the present invention.

Claims

1. A trenching mechanism for a trenching machine, characterized in that: The vehicle includes a frame (1), on which wheels (2) are rotatably mounted and a diesel powertrain (3) is fixedly mounted. The diesel powertrain (3) is driven by a belt drive mechanism (4) to connect to an overload protection mechanism (6). The belt drive mechanism (4) is mounted on a connecting arm (5). The connecting arm (5) is rotatably mounted on the output shaft of the diesel powertrain (3). The output shaft of the diesel powertrain (3) is rotatably mounted on the frame (1). The end of the connecting arm (5) away from the overload protection mechanism (6) is rotatably connected to an angle adjustment frame (8) via a pin. The overload protection mechanism (6) includes a housing (61), which is mounted on the connecting arm (5). A support seat (63) and a support seat (64) are fixedly mounted on the housing (61). 63) A bushing (68) is mounted in the rotating clamp. A helical gear (69) is fixed on the outside of the bushing (68). A friction wheel (70) is fixed on one end of the helical gear (69). The bushing (68) and the support seat (64) slide and rotate to connect the two ends of the worm (66). The worm (66) meshes with the worm wheel (65). A grooved wheel (7) is fixed on the rotating shaft of the worm wheel (65). A spring (67) is fitted on the worm (66) between the tooth of the worm (66) and the support seat (63). A friction wheel (71) is fixed on the worm (66) on the other side of the support seat (63). The helical gear (69) meshes with the helical gear (72). The helical gear (72) is coaxially installed with the driven pulley in the belt drive mechanism (4).

2. The trenching mechanism of a trenching machine according to claim 1, characterized in that: The outer shell 1 (61) has a shell-like structure. The open end of the outer shell 1 (61) is connected to another shell-like structure, the outer shell 2 (62), by bolts. The remaining components of the overload protection mechanism (6) are all located inside the sealed shell formed by the outer shell 1 (61) and the outer shell 2 (62).

3. The trenching mechanism of a trenching machine according to claim 1, characterized in that: The friction wheel 2 (71) has a tapered structure at one end facing the friction wheel 1 (70), and the end of the friction wheel 1 (70) that connects with the friction wheel 2 (71) is formed with a tapered groove structure that fits and conforms to the surface of the friction wheel 2 (71).

4. The trenching mechanism of a trenching machine according to claim 1, characterized in that: The two ends of the spring (67) abut against the end face of an end face bearing (73), and the end face bearing (73) is mounted on the rod of the worm (66). An end face bearing (73) is mounted on the rod between the teeth of the worm (66) and the second support seat (64).

5. The trenching mechanism of a trenching machine according to claim 1, characterized in that: The angle adjustment frame (8) includes an inner tube (81), the bottom end of which is fixed on the frame (1). An outer tube (82) is slidably fitted on the outer side of the inner tube (81). A lead screw (83) is rotatably mounted on the outer tube (82). A handwheel (84) is fixed at the top of the lead screw (83) located on the outer side of the outer tube (82). An internal threaded hole for threaded connection of the lead screw (83) is opened on the inner tube (81). One end of the connecting rod (85) is rotatably connected to the outer tube (82) through a pin. The other end of the connecting rod (85) is rotatably connected to the connecting arm (5) through a pin.

6. The trenching mechanism of a trenching machine according to claim 5, characterized in that: The lead screw (83) has a trapezoidal lead screw structure.

7. The trenching mechanism of a trenching machine according to claim 1, characterized in that: The driving pulley in the belt drive mechanism (4) is fixed on the output shaft of the diesel powertrain (3), and the driven pulley in the belt drive mechanism (4) is rotatably mounted on the connecting arm (5).

Images