Snowmobile combination frame

Abstract

The utility model discloses a snowmobile combination frame, including two symmetrical sheet metal layer, two sheet metal layers between fixed be used for its traction connecting piece, two sheet metal layers between still fixed have support frame, and the support frame is dynamically installed with the track that can drive between, still install the transmission component for the track transmission between two sheet metal layers, and the transmission component includes: driving shaft, and the driving shaft is rotatably connected with the connecting piece and is passed through the connecting piece, and the driving shaft front end is passed through the sheet metal layer of front side and is fixed with driving gear no. 2, the tensioning gear, and the tensioning gear is rotatably arranged at the front end of the front side sheet metal layer. Compared with the prior art, the utility model has the advantages that the position of the tensioning gear can be conveniently moved through the sliding port and the fastening bolt, thereby accurately adjusting the tensioning degree of the chain, effectively compensating the stretching of the chain due to long-term use, ensuring that the transmission can be maintained, and the chain transmission can be arranged at different positions and can adapt to different shape frame structures.

Description

Technical Field

[0001] This utility model relates to the field of snowmobile technology, and in particular to a snowmobile frame assembly. Background Technology

[0002] In snow-covered and difficult-to-access areas, snowmobiles are indispensable practical tools. Currently, when snowmobiles drive their tracks, the engine's kinetic energy is generally transferred to the tracks; the engine cannot directly drive the tracks, requiring a medium for transmission. Patent CN213735401U, titled "Snowmobile," proposes that chain drive is typically used as the primary transmission method for snowmobiles. The engine is directly connected to the drive shaft, driving the drive wheel, which in turn drives the tracks to move the snowmobile. However, in existing technology, because there is usually only one stage of transmission between the engine and the drive shaft, the track size is limited by the strength of the chain, thus posing certain safety hazards.

[0003] In the aforementioned patents, chain drives typically employ belts or chains. Unlike gears or chains, which are rigidly connected by metal, belts are made of composite materials such as rubber, Kevlar, or carbon fiber. During high-speed operation, they are constantly subjected to immense tensile, compressive, and high-temperature forces, leading to material fatigue and aging, making them highly susceptible to breakage. Therefore, they are unsuitable for snow-covered areas with poor transportation. Chain drives, on the other hand, are less prone to breakage and can persist for a period even after performance degradation, reducing the risk of leaving the rider stranded in the wild. Chains typically only need replacement after their performance gradually declines, giving the rider more warning time. However, chains require regular lubrication, cleaning, and tension adjustment. To facilitate chain maintenance, a snowmobile composite frame is proposed. Utility Model Content

[0004] In view of the problems mentioned above, the technical problem to be solved by this utility model is to provide a snowmobile combination frame.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a snowmobile frame assembly, comprising two symmetrically arranged sheet metal layers, a connecting member for traction fixed between the two sheet metal layers, a support frame fixed between the two sheet metal layers, a driveable track mounted on the support frame, and a transmission component for driving the track between the two sheet metal layers, the transmission component comprising: The drive shaft passes through the connector and is rotatably connected to the connector. The front end of the drive shaft passes through the sheet metal layer on the front side and is fixed with a drive gear two. The tensioning gear is slidably and rotatably mounted at the front end of the front sheet metal layer. Driven shaft, passing through two sheet metal layers and rotatably connected to the two sheet metal layers, driven gear fixed at the front end of driven shaft, chain driven between drive gear 2, tension gear and driven gear, tension gear is used to adjust the tension of chain; The drive wheel is fixed on the driven shaft and coaxial with the driven shaft. It is used to mesh with the track and drive the track drive.

[0006] A further preferred embodiment of this utility model is: a drive gear is fixed on the drive shaft and arranged coaxially with it.

[0007] A further preferred embodiment of this utility model is as follows: a sliding opening extending obliquely and penetrating through the sheet metal layer on the front side is provided, a bearing is fixed inside the tension gear to keep the tension gear rotatable, and a fastening bolt is provided on the outside of the bearing, penetrating the bearing and extending into the sliding opening. Rotating the fastening bolt can change its tightness in the sliding opening so as to adjust the position of the tension gear.

[0008] A further preferred embodiment of this utility model is: the tensioning gear tooth profile is a low-interference tensioning wheel.

[0009] A further preferred embodiment of this utility model is: an organic cover is fixed to the outer side of the front sheet metal layer to cover the driving gear, tensioning gear and driven gear.

[0010] A further preferred embodiment of this utility model is: at least two meshing openings penetrate the inner side of the track on the same horizontal line, the meshing openings on the same horizontal line constitute a group, and several groups are evenly distributed along the track. The number of transmission wheels is the same as the number of meshing joints on the same horizontal line. The outer circumference of the transmission wheel is uniformly distributed with integrally set active meshing teeth, which mesh with the corresponding meshing joints.

[0011] A further preferred embodiment of this utility model is: the active meshing tooth is conical and extends outward, and the meshing opening is a long, rectangular frame.

[0012] A further preferred embodiment of this utility model is: the inner side of the track is also integrally provided with driven teeth of the same number as the meshing teeth and staggered in position; multiple sets of evenly circumferentially distributed extension ends are fixed on the inward side of the transmission wheel, and a U-shaped opening is formed between two sets of extension ends, and the corresponding driven teeth mesh in the U-shaped opening between the corresponding two sets of extension ends.

[0013] A further preferred embodiment of this utility model is: the inner side of the extension end has a reinforcing rib integrally formed with the transmission wheel.

[0014] A further preferred embodiment of this utility model is that the driven tooth is also conical and extends outward.

[0015] Compared with the prior art, the advantages of this utility model are: 1. Even if the performance of the chain drive gradually declines due to wear and stretching, it is not easy to fail and leave the rider stranded in the wild. The position of the tension gear can be easily moved through the sliding joint and fastening bolts, thereby precisely adjusting the chain tension, effectively compensating for the stretching of the chain due to long-term use, ensuring that the transmission is maintained. At the same time, the chain drive can be set to different positions to adapt to different frame structures.

[0016] 2. Using a low-interference tensioning wheel with a flatter and shallower tooth profile as the tensioning gear can better guide the chain, prevent chain slippage, reduce deep meshing and friction with the chain rollers, reduce running noise and wear on the chain and gear itself, and extend service life.

[0017] 3. The drive wheel and track adopt a dual meshing mechanism. Even if a part of the meshing point is accidentally damaged, the other meshing points can still continue to work, ensuring that the vehicle has at least limited mobility and greatly improving its survivability in extreme environments. Attached Figure Description

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial structural diagram of the transmission component of this utility model; Figure 3 This utility model Figure 2 A magnified schematic diagram of the structure of part A in the diagram; Figure 4 This is a schematic diagram of the planar structure of the transmission component of this utility model; Figure 5 This is a schematic diagram of the transmission wheel and track structure of this utility model; Figure 6 This is a schematic diagram showing the detailed structure of the transmission wheel of this utility model.

[0020] In the diagram: 1. Sheet metal layer; 2. Connecting parts; 3. Transmission components; 31. Drive shaft; 32. Drive gear one; 33. Drive gear two; 34. Sliding end; 35. Bearing; 36. Fastening bolt; 37. Tensioning gear; 38. Driven shaft; 39. Driven gear; 301. Transmission wheel; 302. Driven gear; 303. Extension end; 304. U-shaped opening; 305. Reinforcing rib; 4. Engine cover; 5. Support frame; 6. Track; 61. Meshing end; 62. Driven gear. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0022] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0023] This embodiment mainly describes a snowmobile frame assembly. Please refer to [link / reference needed]. Figures 1-6 Specifically, the following applies: Chain drives are less prone to breakage and can maintain their performance for a period of time even after performance degradation, making it less likely to leave the rider stranded in the wild. However, chains require regular lubrication, cleaning, and tension adjustment. Based on this, a snowmobile frame assembly is proposed, comprising two symmetrically arranged sheet metal layers 1. A connecting member 2 for traction is fixed between the two sheet metal layers 1. A support frame 5 is also fixed between the two sheet metal layers 1, and a drive track 6 is mounted on the support frame 5. A transmission component 3 for driving the track 6 is also installed between the two sheet metal layers 1. The transmission component 3 includes: The drive shaft 31 passes through the connector 2 and is rotatably connected to the connector 2. The front end of the drive shaft 31 passes through the sheet metal layer 1 on the front side and is fixed with the drive gear 33. The tensioning gear 37 is slidably and rotatably disposed at the front end of the front sheet metal layer 1. Driven shaft 38 passes through two sheet metal layers 1 and is rotatably connected to the two sheet metal layers 1. Driven gear 39 is fixed at the front end of driven shaft 38. A chain is driven between driving gear 33, tension gear 37 and driven gear 39. Tension gear 37 is used to adjust the tension of the chain. The drive wheel 301 is fixed on the driven shaft 38 and coaxial with the driven shaft 38, and is used to mesh with the track 6 to drive the track 6.

[0024] Specifically, a frame is formed by two sheet metal layers 1, connecting parts 2, and support frame 5. The frame contains a transmission component 3, which drives the track 6 mounted on the frame. The transmission component 3 has a drive gear 33, a tension gear 37, and a driven gear 39 connected by a chain. Since the drive gear 33 and the driven gear 39 are positioned one above the other and not on the same vertical line (an offset arrangement), the chain is prone to meshing deviation when it becomes loose, affecting the transmission. The tension gear 37 can adjust the chain tension, minimizing chain loosening. Even if loosening occurs, it can be manually adjusted, thus adapting to different frame structures.

[0025] like Figure 3 As shown, a drive gear 32 is fixed on the drive shaft 31 and coaxially arranged therewith. Specifically, the drive gear 32 is connected to the engine via a chain, which drives the drive gear 32 to rotate. It should be noted that even if the chain becomes loose, it will only sag downwards to a certain extent, having little impact on the transmission. The engine and the drive gear 32 are essentially connected by the engine pulling the chain at the upper end, which in turn drives the drive gear 32 to rotate. This is similar to the chain between the engine and the rear wheel of a motorcycle. Even after performance declines, the chain can still hold for a period of time, making it less likely to leave the rider stranded in the wild.

[0026] like Figures 3-4 As shown, a sliding opening 34 extending obliquely and penetrating through the sheet metal layer 1 on the front side is provided. A bearing 35 is fixed inside the tension gear 37 to keep the tension gear 37 rotatable. A fastening bolt 36 is provided on the outside of the bearing 35, penetrating the bearing 35 and extending into the sliding opening 34. Rotating the fastening bolt 36 can change its tightness in the sliding opening 34 so as to adjust the position of the tension gear 37.

[0027] Specifically, by rotating the fastening bolt 36, the bearing 35 can be fixed in different positions on the slide 34, so that the position of the tensioning gear 37 can be adjusted to ensure that it is in a tensioned state. This allows the driving gear 33 and the driven gear 39 to be in different positions, which can be applied to frames with different shapes and different distributions of driven shafts 38.

[0028] like Figures 3-4 As shown, the tension gear 37 has a low-interference tensioning wheel tooth profile. Specifically, the low-interference tensioning wheel has a flatter and shallower tooth profile, ensuring that the chain always runs on the correct track and preventing chain derailment. It also greatly reduces unnecessary and deep meshing, avoiding severe squeezing and friction between the tooth root and the chain roller, thereby significantly reducing operating noise and wear between the two.

[0029] like Figures 1-2As shown, a cover 4 is fixed to the outer side of the front sheet metal layer 1 to cover the driving gear 33, the tension gear 37, and the driven gear 39. Specifically, it covers the driving gear 33, the tension gear 37, and the driven gear 39 to provide protection, and opening it facilitates maintenance of the transmission components 3.

[0030] like Figures 5-6 As shown, at least two meshing openings 61 penetrate the inner side of the track 6 on the same horizontal line. The meshing openings 61 on the same horizontal line form a group, and several groups are evenly distributed along the track 6. The number of transmission wheels 301 is the same as the number of meshing joints 61 on the same horizontal line. The outer circumference of the transmission wheel 301 is uniformly distributed with integrally set active meshing teeth 302, and the active meshing teeth 302 mesh with the corresponding meshing joints 61.

[0031] Specifically, by setting the active meshing tooth 302 of the transmission wheel 301 to mesh with the corresponding meshing port 61, the transmission wheel 301 can drive the track 6 to drive, and the active meshing tooth 302 can also squeeze out the impurities stuck in the meshing port 61, making it less likely for the meshing port 61 to become clogged.

[0032] Figure 6 As shown, the active tooth 302 is conical and extends outward, and the meshing opening 61 is a long, rectangular frame. Specifically, the conical tip of the active tooth 302 will first contact the track 6. Because it is an inclined surface, it can more easily "slide" into or "guide" into the meshing opening 61 of the track 6, and even if there is a slight misalignment or wobbling, it can be automatically corrected.

[0033] Figure 6 As shown, the inner side of the track 6 also has a number of driven teeth 62 that are the same as the number of meshing teeth 61 but staggered in position. Multiple sets of evenly distributed circumferentially distributed extension ends 303 are fixed to the inward-facing side of the drive wheel 301. A U-shaped opening 304 is formed between two sets of extension ends 303, and the corresponding driven teeth 62 mesh within the U-shaped opening 304 between the corresponding two sets of extension ends 303. Specifically, the U-shaped opening 304, in cooperation with the driven teeth 62, enables the drive wheel 301 to drive the track 6. Through this double meshing transmission, even if some of the driving teeth 302, U-shaped opening 304, meshing teeth 61, or driven teeth 62 are damaged, the drive wheel 301 can still drive the track 6, making it suitable for areas covered by ice and snow with poor transportation. Figure 6 As shown, the inner side of the extension end 303 has a reinforcing rib 305 integrally formed with the drive wheel 301. By making the drive wheel 301 hollow and having a reinforcing rib 305, the weight of the drive wheel 301 is reduced to the greatest extent while ensuring that the drive wheel 301 has a certain strength. This reduces the weight of the frame, reduces fuel consumption, and improves operational flexibility.

[0034] Figure 6As shown, the driven tooth 62 is also tapered and extends outward, and has the same shape and function as the driving tooth 302 mentioned above.

[0035] Working principle: The snowmobile body is based on existing technology. Its drive gear 32 is driven by the engine through a chain. It should be noted that the snowmobile body has the same structure as a conventional motorcycle, and the drive gear 32 is the same as the rear wheel gear in the existing motorcycle structure. Therefore, the body structure of a conventional motorcycle can be directly adopted.

[0036] When the drive shaft 31 rotates and drives the drive gear 33 to rotate, the driven gear 39 is driven to rotate through the chain transmission, causing the driven shaft 38 and the transmission wheel 301 to rotate as well, and the track 6 that meshes with the transmission wheel 301 to work.

[0037] The above should be noted that, for example Figure 4 As shown, in order to drive the track 6 forward, the driven gear 39 needs to rotate counterclockwise, and the chain also needs to rotate counterclockwise. Since the driving gear 33 and the driven gear 39 are positioned one above the other and not on the same vertical line, the chain needs to be in a tensioned state in order to keep the driving gear 33 and the driven gear 39 engaged with the chain. During use, the performance of the chain gradually decreases and the tension will change. Based on this, a tensioning gear 37 with adjustable position needs to be set to tension the chain. In addition, the tension gear 37 is a low-interference tension wheel. This tooth shape is flatter and shallower, ensuring that the chain always runs on the correct track and preventing chain derailment. It also greatly reduces unnecessary and deep meshing, avoiding severe squeezing and friction between the tooth root and the chain roller. This significantly reduces operating noise and wear between the two, extends the service life of the chain machine tension gear 37, and makes it less likely to leave the rider stranded in the field.

[0038] Secondly, the drive wheel 301 engages with the meshing mouth 61 and the driven meshing mouth 62 through the active meshing tooth 302 and the U-shaped opening 304 respectively. Therefore, the drive wheel 301 engages with the track 6 in two ways. Even if the active meshing tooth 302, the U-shaped opening 304, the meshing mouth 61 and the driven meshing tooth 62 are damaged in some parts during use, the drive wheel 301 can still drive the track 6, so as to adapt to areas covered by ice and snow and where transportation is inconvenient. It should be noted that the extended end 303 increases the support area of ​​the transmission wheel 301, ensuring the stable movement of the transmission wheel 301 driving the track 6. The transmission wheel 301 is hollow inside and has reinforcing ribs 305, which minimizes the weight of the transmission wheel 301 while ensuring that the transmission wheel 301 has a certain strength.

[0039] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0040] The above provides a detailed description of a snowmobile frame assembly provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A snowmobile frame assembly, characterized in that, It includes two symmetrically arranged sheet metal layers, with a connecting piece fixed between the two sheet metal layers for traction, and a support frame fixed between the two sheet metal layers. A drive track is mounted on the support frame, and a transmission component for driving the track is also installed between the two sheet metal layers. The transmission component includes: The drive shaft passes through the connector and is rotatably connected to the connector. The front end of the drive shaft passes through the sheet metal layer on the front side and is fixed with a drive gear two. The tensioning gear is slidably and rotatably mounted at the front end of the front sheet metal layer. Driven shaft, passing through two sheet metal layers and rotatably connected to the two sheet metal layers, driven gear fixed at the front end of driven shaft, chain driven between drive gear 2, tension gear and driven gear, tension gear is used to adjust the tension of chain; The drive wheel is fixed on the driven shaft and coaxial with the driven shaft. It is used to mesh with the track and drive the track drive.

2. The snowmobile frame according to claim 1, characterized in that, A drive gear is fixed on the drive shaft and is arranged on the same axis as the drive shaft.

3. The snowmobile frame according to claim 1, characterized in that, The front sheet metal layer has a diagonally extending and through-hole sliding opening. A bearing is fixed inside the tension gear to keep the tension gear rotatable. A fastening bolt is provided on the outside of the bearing, which passes through the bearing and extends into the sliding opening. Rotating the fastening bolt can change the tightness of its position in the sliding opening, so as to adjust the position of the tension gear.

4. The snowmobile frame according to claim 3, characterized in that, The tensioning gear tooth profile is a low-interference tensioning wheel.

5. The snowmobile frame according to claim 1, characterized in that, An organic cover is fixed to the outside of the front sheet metal layer to cover the drive gear, tension gear, and driven gear.

6. The snowmobile frame according to claim 1, characterized in that, At least two meshing joints run through the same horizontal line on the inner side of the track. Meshing joints on the same horizontal line constitute a group, and several groups are evenly distributed along the track. The number of transmission wheels is the same as the number of meshing joints on the same horizontal line. The outer circumference of the transmission wheel is uniformly distributed with integrally set active meshing teeth, which mesh with the corresponding meshing joints.

7. The snowmobile frame according to claim 6, characterized in that, The active teeth are conical and extend outwards, and the meshing opening is a long, rectangular frame.

8. The snowmobile frame according to claim 6, characterized in that, The inner side of the track also has a number of driven teeth that are the same as the number of meshing teeth but staggered in position. On the side of the drive wheel facing inward, there are multiple sets of evenly distributed circumferentially distributed extension ends. A U-shaped opening is formed between two sets of extension ends, and the corresponding driven teeth mesh in the U-shaped opening between the corresponding two sets of extension ends.

9. The snowmobile frame according to claim 8, characterized in that, The inner side of the extension end has a reinforcing rib that is integrally formed with the transmission wheel.

10. The snowmobile frame according to claim 8, characterized in that, The driven teeth are also tapered and extend outwards.

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