Log cutting device
By designing a log harvesting device with a protective shell and a cross-drive shaft structure, the problems of high labor intensity in tree harvesting and easy damage to the cutting disc were solved, thereby improving cutting stability and ease of maintenance.
Patent Information
- Application Number
- CN202520425493.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2035-03-12
Smart Images
Figure CN223859876U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of log harvesting technology, and in particular to a log harvesting device. Background Technology
[0002] When felling trees in the wild, trees are usually cut down manually using a special chainsaw. During the sawing process, a person needs to hold the handle of the chainsaw to control its stable operation and keep the sawn surface of the trunk as flat as possible, which is quite labor-intensive.
[0003] To facilitate tree felling, large cutting discs are used to cut the roots of trees. However, the cutting discs generate a large moment of rotational inertia during operation, which can cause a large torsional force on the drive shaft when cutting deep. When the torsional force is too large, it can easily damage the cutting disc and drive shaft, resulting in high subsequent maintenance costs. Utility Model Content
[0004] This utility model provides a log harvesting device to solve the problems of the prior art.
[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by this utility model is as follows:
[0006] A log harvesting device includes a protective shell. The top and bottom surfaces of the protective shell are provided with annular limiting grooves. The bottom of the protective shell is provided with a connecting groove that extends into the interior. A connecting turntable is rotatably arranged inside the connecting groove. A cross drive shaft is also located inside the protective shell. The bottom of the cross drive shaft is engaged with the top of the connecting turntable. A cross retainer is fitted on the outer surface of the cross drive shaft. A cutting disc is fixed on the outer surface of the cross retainer.
[0007] Optionally, one side of the protective shell has a crescent-shaped opening, and one side of the cutting disc inside the protective shell extends to the crescent-shaped opening.
[0008] Optionally, the top and bottom of the cross-shaped retainer are slidably engaged inside the annular limiting groove, and the inner wall of the mating groove is provided with an annular groove.
[0009] Optionally, the outer surface of the docking turntable is raised and slides into the interior of the annular groove, and the bottom of the protective shell is provided with a lower locking cover, the top of which extends into the interior of the docking groove.
[0010] Optionally, the top of the lower locking cover has an inner cavity, and a rotating block is rotatably arranged inside the inner cavity. The top of the rotating block is fixed to the bottom of the docking turntable.
[0011] Optionally, the top of the protective shell is provided with a groove, and an upper locking cover is provided between the inner walls of the groove, and a pulley shaft is provided on the top of the upper locking cover.
[0012] Optionally, the bottom of the pulley shaft extends through the interior of the protective housing and is fixed to the cross drive shaft, and an overlapping plate is fixed to the other side of the protective housing.
[0013] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art. Of course, any product implementing the present invention does not necessarily need to achieve all of the following advantages at the same time:
[0014] 1. In this utility model, one side of the protective shell is opened into a crescent shape, and one side of the cutting disc extends into the interior of the crescent shape. This prevents the debris generated by the cutting disc during cutting from splashing outwards under the covering and blocking effect on both sides of the crescent shape. In actual use, the material used for the cross drive shaft has a lower rigidity than the material used for the cross sleeve. Thus, when a large inertial force impact is generated during the cutting process of the cutting disc, the cross drive shaft will be damaged before the cross sleeve, thereby isolating the power transmission. At the same time, the cross drive shaft is easy to replace after damage, which helps with subsequent maintenance.
[0015] 2. In this utility model, when the cutting disc rotates, the top and bottom of the cross sleeve are engaged with the inside of the annular limiting groove, making the cross sleeve more stable during rotation and able to withstand greater radial force generated by the cutting disc. A docking turntable is set inside the docking groove to support the bottom of the cross drive shaft. At the same time, the edge of the docking turntable is engaged with the inside of the annular groove, making it more stable during rotation and less prone to shaking, while also being able to withstand greater axial force generated by the cross drive shaft. Attached Figure Description
[0016] The accompanying drawings described below are merely some embodiments. Those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:
[0017] Figure 1 This utility model provides a top-view three-dimensional structural diagram of a log harvesting device;
[0018] Figure 2 This utility model provides a cross-sectional three-dimensional structural diagram of a log harvesting device;
[0019] Figure 3 This utility model provides a three-dimensional cross-sectional view of the internal structure of a log harvesting device;
[0020] Figure 4 This utility model Figure 2A magnified view of point A in the middle.
[0021] The attached diagram lists the components represented by each number as follows:
[0022] 1. Protective shell; 2. Cutting disc; 3. Overlap plate; 4. Upper locking cover; 5. Pulley shaft; 6. Groove; 7. Cross drive shaft; 8. Cross ferrule; 9. Annular limiting groove; 10. Lower locking cover; 11. Inner cavity; 12. Rotating block; 13. Docking turntable; 14. Annular groove; 15. Docking groove.
[0023] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art by referring to specific embodiments. Detailed Implementation
[0024] The present invention will now be described in further detail with reference to the accompanying drawings.
[0025] Example 1, such as Figure 1-4 As shown, this utility model provides a technical solution for a log harvesting device: it includes a protective shell 1, with annular limiting grooves 9 on both the top and bottom surfaces of the protective shell 1, and a connecting groove 15 extending through the bottom of the protective shell 1. A connecting turntable 13 is rotatably installed inside the connecting groove 15. A cross drive shaft 7 is also installed inside the protective shell 1. The bottom of the cross drive shaft 7 is engaged with the top of the connecting turntable 13. A cross retainer 8 is fitted onto the outer surface of the cross drive shaft 7, and a cutting disc 2 is fixed to the outer surface of the cross retainer 8.
[0026] The overall effect of Embodiment 1 is that one side of the protective shell 1 is opened into a crescent shape, and one side of the cutting disc 2 extends into the interior of the crescent shape. This prevents the debris generated by the cutting disc 2 during cutting from splashing outwards under the covering and blocking effect on both sides of the crescent shape. At the same time, in actual use, the material stiffness of the cross drive shaft 7 is less than that of the material stiffness of the cross ferrule 8. Thus, when a large inertial force impact is generated during the cutting process of the cutting disc 2, the cross drive shaft 7 will be damaged before the cross ferrule 8, thereby isolating the power transmission. In addition, the cross drive shaft 7 is easy to replace after damage, which helps with subsequent maintenance.
[0027] Example 2, as Figure 1-4As shown, one side of the protective shell 1 has a crescent-shaped opening. The cutting disc 2 inside the protective shell 1 extends to the crescent-shaped opening. The top and bottom of the cross-shaped sleeve 8 are slidably engaged inside the annular limiting groove 9. The inner wall of the docking groove 15 has an annular groove 14. The outer surface of the docking turntable 13 is raised and slidably engaged inside the annular groove 14. The bottom of the protective shell 1 is provided with a lower locking cover 10. The top of the lower locking cover 10 extends into the docking groove 15. The top of the lower locking cover 10 has an inner cavity 11. A rotating block 12 is rotatably arranged inside the inner cavity 11. The top of the rotating block 12 is fixed to the bottom of the docking turntable 13. The top of the protective shell 1 has a groove 6. An upper locking cover 4 is arranged between the inner walls of the groove 6. A pulley shaft 5 is arranged on the top of the upper locking cover 4. The bottom of the pulley shaft 5 penetrates into the interior of the protective shell 1 and is fixed to the cross drive shaft 7. The other side of the protective shell 1 is fixed with an overlapping plate 3.
[0028] The overall effect of embodiment 2 is that when the cutting disc 2 rotates, by engaging the top and bottom of the cross sleeve 8 with the corresponding inside the annular limiting groove 9, the cross sleeve 8 rotates more smoothly and can withstand greater radial force generated by the cutting disc 2. The docking turntable 13 is set inside the docking groove 15 to support the bottom of the cross drive shaft 7. At the same time, the edge of the docking turntable 13 is engaged with the inside of the annular groove 14, making it more stable during rotation and less prone to shaking. It can also withstand greater axial force generated by the cross drive shaft 7.
[0029] Working principle: A crescent-shaped opening is made on one side of the protective shell 1, and one side of the cutting disc 2 extends into the interior of the crescent-shaped opening. This allows the debris generated by the cutting disc 2 during cutting to be prevented from splashing outwards by the enveloping effect on both sides of the crescent-shaped opening. Furthermore, in actual use, the material used for the cross drive shaft 7 has lower rigidity than the material used for the cross retainer 8. Therefore, when a large inertial force impacts during the cutting process of the cutting disc 2, the cross drive shaft 7 will be damaged before the cross retainer 8, thus isolating power transmission. Additionally, once the cross drive shaft 7 is damaged... For easy replacement and subsequent maintenance, when the cutting disc 2 rotates, the top and bottom of the cross sleeve 8 are engaged with the inside of the annular limiting groove 9, making the cross sleeve 8 more stable when rotating, and at the same time, it can withstand the greater radial force generated by the cutting disc 2. The docking turntable 13 is set inside the docking groove 15, which can support the bottom of the cross drive shaft 7. At the same time, the edge of the docking turntable 13 is engaged with the inside of the annular groove 14, making it more stable when rotating and less prone to shaking, while also being able to withstand the greater axial force generated by the cross drive shaft 7.
[0030] This utility model is not limited to the above-described embodiments. Anyone should know that structural changes made under the guidance of this utility model, and any technical solutions that are the same as or similar to this utility model, fall within the protection scope of this utility model. Technical aspects, shapes, and structures not described in detail in this utility model are all publicly known technologies.
Claims
1. A log harvesting device, comprising a protective shell (1), characterized in that: The protective shell (1) has an annular limiting groove (9) on its top and bottom surfaces. The bottom of the protective shell (1) has a through-hole docking groove (15) that extends into the interior. A docking turntable (13) is rotatably installed inside the docking groove (15). The protective shell (1) also has a cross drive shaft (7) inside. The bottom of the cross drive shaft (7) is engaged with the top of the docking turntable (13). A cross sleeve (8) is fitted on the outer surface of the cross drive shaft (7). A cutting disc (2) is fixed on the outer surface of the cross sleeve (8).
2. The log harvesting device according to claim 1, characterized in that: One side of the protective shell (1) has a crescent-shaped opening, and one side of the cutting disc (2) inside the protective shell (1) extends to the crescent-shaped opening.
3. A log harvesting device according to claim 2, characterized in that: The top and bottom of the cross sleeve (8) are slidably engaged inside the annular limiting groove (9), and the inner wall of the docking groove (15) is provided with an annular groove (14).
4. A log harvesting device according to claim 3, characterized in that: The outer surface of the docking turntable (13) is raised and slides into the interior of the annular groove (14). The bottom of the protective shell (1) is provided with a lower locking cover (10), and the top of the lower locking cover (10) extends into the interior of the docking groove (15).
5. A log harvesting device according to claim 4, characterized in that: The top of the lower locking cover (10) is provided with an inner cavity (11), and a rotating block (12) is rotatably arranged inside the inner cavity (11). The top of the rotating block (12) is fixed to the bottom of the docking turntable (13).
6. A log harvesting device according to claim 5, characterized in that: The protective shell (1) has a groove (6) on its top, and an upper locking cover (4) is provided between the inner walls of the groove (6). A pulley shaft (5) is provided on the top of the upper locking cover (4).
7. A log harvesting device according to claim 6, characterized in that: The bottom of the pulley shaft (5) extends into the interior of the protective shell (1) and is fixed on the cross drive shaft (7). A lap plate (3) is fixed on the other side of the protective shell (1).