A belt slip prevention continuously variable transmission and harvester

Abstract

The utility model relates to a kind of prevent belt slipping continuously variable transmission and harvester, it is related to agricultural implement technical field, wherein, a kind of prevent belt slipping continuously variable transmission, including fixed disc fixed disc, belt driving disc and belt fixed disc, the belt driving disc coaxial sliding connection in the fixed disc fixed disc, one end of the belt fixed disc is coaxially fixedly connected in one end of the fixed disc fixed disc, and the other end is sleeved and slides in the belt driving disc, belt groove is formed between the belt driving disc and belt fixed disc, the included angle of the belt groove is 30 °.The utility model can relatively increase the transmission friction of belt, reduce the possibility of skidding, reduce use cost, improve product competitiveness.

Description

Technical Field

[0001] This utility model relates to the field of agricultural machinery technology, and in particular to a continuously variable transmission device and harvester for preventing belt slippage. Background Technology

[0002] The continuously variable transmission (CVT) disc pulley is one of the key working components in combined grain harvesting machinery. Its main function is to optimize the transmission ratio between the drive and driven pulleys by adjusting the positions of the CVT drive and driven pulley belts, thereby adjusting the transmission ratio of the engine power through the CVT and precisely controlling the rotational speed of the drum. This is designed to meet the harvesting speed requirements of different grains such as wheat and corn, and to adapt to the specific requirements of various operating conditions.

[0003] Currently, in mainstream roller continuously variable transmissions (CVTs) on the market, the belt groove angle between the belt drive disc and the belt stationary disc is generally 26°. This design results in insufficient belt friction to meet the required torque transmission, leading to belt slippage and ultimately causing roller blockage. This defect not only increases usage and maintenance costs but also significantly weakens the product's market competitiveness. Utility Model Content

[0004] This utility model provides a continuously variable transmission device and harvester to prevent belt slippage, which can relatively increase the transmission friction of the belt, reduce the possibility of slippage, reduce the cost of use, and improve product competitiveness.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: This utility model provides a continuously variable transmission device to prevent belt slippage, including a fixed plate, a belt drive plate, and a belt fixed plate. The belt drive plate is slidably connected to the fixed plate on the same axis. One end of the belt fixed plate is fixedly connected to one end of the fixed plate on the same axis, and the other end is sleeved on and slides on the belt drive plate. A belt groove is formed between the belt drive plate and the belt fixed plate, and the included angle of the belt groove is 30°.

[0006] The beneficial effects of this utility model are: when in use, the belt is installed in the belt groove, and the included angle of the belt groove is adjusted from 26° to 30°, which can increase the transmission friction of the belt on the driven pulley, thereby improving the transmission efficiency of the belt, reducing the possibility of slippage, reducing the cost of use, and improving the competitiveness of the product.

[0007] Based on the above technical solution, the present invention can be further improved as follows.

[0008] Furthermore, an oil storage tank is formed between the leather drive plate and the fixed plate, and the leather drive plate has an oil hole that communicates with the oil storage tank, with an oil cup connected to the opening of the oil hole.

[0009] Furthermore, the inner side of the belt drive disc is fixedly connected with two inner dustproof sealing rings, the oil storage tank is located between the two inner dustproof sealing rings, and the two inner dustproof sealing rings simultaneously abut against the fixed disc.

[0010] Furthermore, a dustproof ring is fixedly installed on the inner side of the belt reel, and the dustproof ring abuts against the belt drive disc.

[0011] Furthermore, a respirator is fixedly installed on the belt disc, and the respirator is connected to the sealed cavity between the belt disc fixing plate, the belt drive plate, and the belt disc.

[0012] Furthermore, it also includes a cam assembly, which includes a moving plate cam, a fixed plate cam, and a spring. The moving plate cam is sleeved on the outside of the fixed plate and fixedly connected to the side wall of the belt drive plate away from the belt fixed plate. The fixed plate cam is fixedly connected to the other end of the fixed plate, and the fixed plate cam and the moving plate cam are engaged by three cam claws. The spring is sleeved on the outside of the fixed plate, and its two ends abut against the fixed plate cam and the belt drive plate, respectively.

[0013] Furthermore, the cam assembly also includes a protective cover, which is fixedly connected to the moving plate cam and covers the moving plate cam and the fixed plate cam.

[0014] Furthermore, the fixed plate cam is fixedly connected to a first bushing, which is embedded in the other open end of the fixed plate.

[0015] Furthermore, a second bushing is embedded in the open end of the fixed plate.

[0016] This utility model also provides a harvester, including a continuously variable transmission device to prevent belt slippage, and a machine input shaft, wherein the fixed plate is keyed to the machine input shaft. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the present invention; Figure 2 For the present utility model Figure 1 Enlarged view of section A; Figure 3 For the present utility model Figure 1 Enlarged view of section B; Figure 4 For the present utility model Figure 1 Enlarged view of section C; Figure 5 This is a diagram showing the usage state of this utility model.

[0018] The attached diagram lists the components represented by each number as follows: 1. Fixed plate; 2. Cam assembly; 21. Moving plate cam; 22. Fixed plate cam; 221. First bushing; 222. Second bushing; 23. Spring; 24. Protective cover; 241. Oil seal; 3. Leather drive plate; 31. Oil hole; 32. Oil cup; 33. Inner dustproof sealing ring; 4. Belt retainer; 41. Dust seal; 42. Breathing device; 5. Input shaft of the whole machine. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0020] This utility model provides a continuously variable transmission device to prevent belt slippage, as detailed below.

[0021] Example 1 like Figures 1-4 This utility model provides a continuously variable transmission device to prevent belt slippage, including a fixed plate 1, a belt drive plate 3, and a belt fixed plate 4. The belt drive plate 3 is slidably connected to the fixed plate 1 on the same axis. One end of the belt fixed plate 4 is fixedly connected to one end of the fixed plate 1 on the same axis, and the other end is sleeved and slidably attached to the belt drive plate 3. A belt groove is formed between the belt drive plate 3 and the belt fixed plate 4, and the included angle of the belt groove is 30°.

[0022] The beneficial effects of this embodiment are: when in use, the belt is installed in the belt groove, and the included angle of the belt groove is adjusted from 26° to 30°, which can increase the transmission friction of the belt on the driven pulley, thereby improving the transmission efficiency of the belt, reducing the possibility of slippage, reducing the cost of use, and improving the competitiveness of the product.

[0023] As shown in Table 1, after testing, the load power value is the highest when the included angle is 30°, which is 151kW. Table 1. Belt Power Test Table for Preventing Belt Slippage in Continuously Variable Transmission (CVT) Operation The continuously variable transmission (CVT) assembly structure provided in this application is applied to the whole machine. By adjusting the power input of the CVT drive pulley assembly, the belt drive disc 3 slides left and right on the fixed disc 1, thereby increasing or decreasing the gap between the belt drive disc 3 and the belt fixed disc 4, and thus adjusting the transmission speed ratio.

[0024] In this embodiment of the application, one end of the belt guide plate 4 is coaxially fixedly connected to one end of the guide plate fixing plate 1 by a first screw.

[0025] In this embodiment, the belt drive disc 3 is made of high-specification ductile iron material to increase its wear resistance and self-lubrication.

[0026] The surface of the belt disc 4 is treated with high-frequency quenching and chrome plating to increase wear resistance and extend its service life.

[0027] Example 2 like Figure 1 and Figure 2 Based on embodiment 1, an oil storage tank is formed between the leather drive plate 3 and the fixed plate 1, and the leather drive plate 3 is provided with an oil hole 31 that communicates with the oil storage tank. An oil cup 32 is connected to the opening of the oil hole 31.

[0028] The beneficial effect of the preferred solution in the above embodiments is that the belt drive disc 3 slides on the fixed disc 1 shaft to realize the change of belt movement diameter. By setting oil hole 31 and oil cup 32, it is convenient for users to add grease through oil cup 32 during maintenance, so that the oil storage groove between the belt drive disc 3 and the fixed disc 1 is full of lubricating grease, so that the belt drive disc 3 can be fully lubricated when sliding on the surface of the fixed disc 1, and the wear of the belt drive disc 3 is reduced.

[0029] In the embodiments of this application, an oil hole 31 and an oil cup 32 are considered as a group, and the specific number of oil holes 31 and oil cups 32 in a group can be one group, two groups, or three groups, etc.

[0030] Example 3 like Figures 1-3 Based on embodiments 1 and 2, two inner dustproof sealing rings 33 are fixedly connected to the inner side of the belt drive disc 3, the oil storage tank is located between the two inner dustproof sealing rings 33, and the two inner dustproof sealing rings 33 simultaneously abut against the fixed disc 1.

[0031] The beneficial effect of the preferred solution in the above embodiments is that two inner dustproof sealing rings 33 are installed at both ends of the inner side of the belt drive plate 3 for sealing the sliding lubrication of the belt drive plate 3 on the fixed plate 1, preventing the excessive gap caused by friction and wear between the belt drive plate 3 and the fixed plate 1, which would lead to vibration and abnormal noise. At the same time, the inner dustproof sealing rings 33 are made of low temperature resistant material to ensure that the performance is not affected at minus fifty degrees.

[0032] Example 4 like Figure 1 and Figure 4 Based on embodiments 1-3, a dustproof ring 41 is fixedly installed on the inner side of the belt pulley 4, and the dustproof ring 41 abuts against the belt pulley 3.

[0033] The beneficial effect of the preferred solution in the above embodiments is that the dustproof ring 41 prevents dust from entering the surface of the fixed plate 1 and forming sludge, so that contaminants are formed between the inner hole of the driven wheel 3 and the outer diameter of the fixed plate 1, causing the driven wheel 3 to jam.

[0034] Example 5 like Figure 1 and Figure 4 Based on Examples 1-4, a respirator 42 is fixedly installed on the belt plate 4, and the respirator 42 connects the fixed plate 1, the belt drive plate 3 and the sealed cavity between the belt plate 4.

[0035] The beneficial effect of adopting the preferred solution in the above embodiments is that the air pressure between the sealed cavity and the outside is balanced by the breather 42, preventing lubricating oil leakage and the intrusion of external contaminants, thereby ensuring the stable and reliable operation of the continuously variable transmission system.

[0036] Example 6 like Figure 1 and Figure 2 Based on embodiments 1-5, the continuously variable transmission device for preventing belt slippage of this utility model further includes a cam group 2. The cam group 2 includes a moving plate cam 21, a fixed plate cam 22, and a spring 23. The moving plate cam 21 is sleeved on the outside of the fixed plate 1 and fixedly connected to the side wall of the belt drive plate 3 away from the belt fixed plate 4. The fixed plate cam 22 is fixedly connected to the other end of the fixed plate 1, and the fixed plate cam 22 and the moving plate cam 21 are connected by three cam claws. The spring 23 is sleeved on the outside of the fixed plate 1, and its two ends abut against the fixed plate cam 22 and the belt drive plate 3, respectively.

[0037] The beneficial effect of the preferred solution in the above embodiments is that the fixed plate cam 22 and the moving plate cam 21 are engaged by three cam claws to prevent relative rotation and slippage between the belt drive plate 3 and the belt fixed plate 4. Specifically, it can prevent the belt from driving the belt drive plate 3 and the belt fixed plate 4 to rotate when overloaded.

[0038] It should be noted that, as a technically known method to those skilled in the art, the fixed cam 22 and the moving cam 21 are connected by three cam claws. Specifically, the fixed cam 22 and the moving cam 21 are coaxially arranged and each is provided with three tapered claws. The tapered claws of both are inserted into corresponding notches, so that the fixed cam 22 and the moving cam 21 can achieve an interlocking structure through the corresponding tapered claws. When the belt drives the disk 3 to slide, the fixed cam 22 and the moving cam 21 slide relative to each other. The surfaces of the three cam claws are hardened to increase their hardness.

[0039] During use, the fixed plate cam 22 and the moving plate cam 21, through the combination of three cam claws, generate an axial thrust proportional to the centrifugal force when the rotational speed changes, thereby automatically adjusting the working diameter of the belt in the belt groove to achieve stepless speed change; at the same time, the spring 23 provides the initial axial clamping force to the entire system through its preload, and works in conjunction with the axial force generated by the cam to ensure the smoothness of the speed change process and the reliability of the transmission.

[0040] In this embodiment, the moving cam 21 is coaxially fixedly connected to the moving disc 3 via a second screw. The fixed cam 22 is coaxially fixedly connected to the fixed disc 1 via a third screw.

[0041] In this invention, the spring 23 can be a spring with a spring force of 5400N, so that the axial thrust of the spring 23 on the belt drive disc 3 is controlled within a suitable range, which can ensure that the belt can pull the belt drive disc 3 apart, and that the axial thrust of the belt drive disc 3 can meet the transmission of the belt power of the whole machine without slippage.

[0042] Example 7 like Figure 1 and Figure 3 Based on embodiments 1-6, the cam assembly 2 further includes a protective cover 24, which is fixedly connected to the moving plate cam 21 and covers the moving plate cam 21 and the fixed plate cam 22.

[0043] The advantage of adopting the preferred solution in the above embodiments is that the protective cover 24 forms dust protection for its internal components.

[0044] In this embodiment, the second screw passes through both the protective cover 24 and the moving disc cam 21 to be simultaneously fixedly connected to the leather-driven disc 3.

[0045] Example 8 like Figure 1 and Figure 3 Based on embodiments 1-7, the fixed plate cam 22 is fixedly connected to a first bushing 221, and the first bushing 221 is embedded in the other open end of the fixed plate 1.

[0046] The beneficial effect of adopting the preferred solution in the above embodiments is that the first bushing 221 provides support for the other end of the fixed plate 1, thereby improving the connection strength and reducing the failure rate.

[0047] Example 9 like Figure 1 and Figure 4 Based on embodiments 1-8, a second bushing 222 is embedded in the open end of the fixed plate 1.

[0048] The beneficial effect of adopting the preferred solution in the above embodiments is that by forming a support for one end of the fixed plate 1 through the second bushing 222, the connection strength is improved and the failure rate is reduced.

[0049] Example 10 like Figure 1 and Figure 5 This embodiment also provides a harvester, including a continuously variable transmission device for preventing belt slippage as described in any one of embodiments 1-9, and further including a machine input shaft 5, with a fixed plate 1 keyed to the machine input shaft 5.

[0050] Based on the above embodiment, the first bushing 221, the second bushing 222 and the protective cover 24 are all sleeved on the input shaft 5 of the whole machine, and an oil seal 241 is fixedly connected to the inner side of the protective cover 24.

[0051] In this embodiment, the oil seal 241 is connected to the oil seal ring of the machine's input shaft 5, forming a sealed housing space to prevent internal lubricating oil leakage and the entry of external impurities. The oil seal 241 is a fluororubber oil seal, which improves the sealing performance at the machine's input shaft 5, ensuring it remains undamaged even at temperatures as low as -50 degrees Celsius in Northeast China, and reducing the failure rate of oil seal leakage in parts.

[0052] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0054] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0055] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A continuously variable transmission (CVT) device for preventing belt slippage, comprising a fixed disc (1), a belt drive disc (3), and a belt fixed disc (4), characterized in that, The belt drive disc (3) is slidably connected to the fixed disc (1) on the same axis. One end of the belt fixed disc (4) is fixedly connected to one end of the fixed disc (1) on the same axis, and the other end is sleeved and slidably connected to the belt drive disc (3). A belt groove is formed between the belt drive disc (3) and the belt fixed disc (4), and the included angle of the belt groove is 30°.

2. The belt-slip preventing continuously variable transmission according to claim 1, wherein An oil storage tank is formed between the leather drive plate (3) and the fixed plate (1), and the leather drive plate (3) is provided with an oil hole (31) that communicates with the oil storage tank. An oil cup (32) is connected to the opening of the oil hole (31).

3. The belt-slip-preventing continuously variable transmission according to claim 2, wherein The inner side of the belt drive plate (3) is fixedly connected to two inner dustproof sealing rings (33), the oil storage tank is located between the two inner dustproof sealing rings (33), and the two inner dustproof sealing rings (33) simultaneously abut against the fixed plate (1).

4. The belt-slip-preventing continuously variable transmission according to claim 1, wherein A dustproof ring (41) is fixedly installed on the inner side of the belt disc (4), and the dustproof ring (41) abuts against the belt drive disc (3).

5. The slip-preventing continuously variable transmission according to claim 4, wherein The belt plate (4) is fixedly equipped with a respirator (42), which connects the fixed plate (1), the belt drive plate (3) and the sealed cavity between the belt plate (4).

6. A belt slip prevention CVT according to any one of claims 1 to 5, characterized in that, It also includes a cam assembly (2), which includes a moving plate cam (21), a fixed plate cam (22), and a spring (23). The moving plate cam (21) is sleeved on the outside of the fixed plate (1) and fixedly connected to the side wall of the belt drive plate (3) away from the belt fixed plate (4). The fixed plate cam (22) is fixedly connected to the other end of the fixed plate (1), and the fixed plate cam (22) and the moving plate cam (21) are connected by three cam claws. The spring (23) is sleeved on the outside of the fixed plate (1), and its two ends abut against the fixed plate cam (22) and the belt drive plate (3) respectively.

7. A belt slip prevention CVT according to claim 6, wherein The cam assembly (2) also includes a cover (24), which is fixedly connected to the moving plate cam (21) and covers the moving plate cam (21) and the fixed plate cam (22).

8. The belt-slip-preventing continuously variable transmission according to claim 6, wherein The fixed plate cam (22) is fixedly connected to a first bushing (221), which is embedded in the other open end of the fixed plate (1).

9. The belt-slip-preventing continuously variable transmission according to claim 8, wherein The fixed plate (1) has a second bushing (222) embedded in one open end.

10. A harvester characterized by The continuously variable transmission device for preventing belt slippage as described in any one of claims 1-9 also includes a machine input shaft (5), wherein the fixed plate (1) is keyed to the machine input shaft (5).

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