Multi-stage speed change structure for threshing device of multi-crop seed combine harvester

Abstract

The utility model discloses a multistage speed change structure for a threshing device of a multi-crop seed combine harvester, which comprises a stepless speed change mechanism and a stepped speed changing box which are connected with each other, and an output shaft of the stepped speed changing box is connected with an axial flow roller shaft. According to the speed change structure, the stepless speed change mechanism and the stepped gearbox are used together, the requirement for a larger speed change range of a threshing device of the seed combine harvester can be met, the speed change structure can be greatly suitable for harvesting of various crops of different types, and applicability is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of combine harvester structures, in particular to a multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester. Background Art

[0002] my country has a wide variety of crops and rich resources, but the physical properties of different crop seeds vary greatly, and the difficulty of threshing varies greatly. Some crop seeds are easy to break, some crop seeds are hard, some crops are easy to thresh, and some crops are difficult to thresh, which brings difficulties to the configuration of threshing parameters of mechanized harvesting devices. It is necessary to select appropriate configuration parameters for different harvested crops to obtain less loss, stronger threshing, and better harvesting effects. At present, the harvesting of different crop seeds in my country generally uses a combine harvester for harvesting. The threshing device is the most important part, which plays the role of threshing the crops cut by the harvesting header. When the combine harvester harvests a single crop, it is not necessary to frequently adjust the speed of the threshing device. However, when harvesting different types of multi-crop seeds, due to the large variety of varieties and different adaptability of different seeds to the threshing device, frequent speed adjustment is required to achieve a satisfactory threshing effect. This requires that the rotation speed of the threshing device of the seed combine harvester has the requirement of speed adjustment at any time to adapt to the harvesting of different types of multi-crop seeds. Therefore, the industry has improved the combine harvester by adding a speed change mechanism to achieve the speed change of the threshing device. With the development and progress of technology, speed change technology is also being improved to meet the needs of users. Utility Model Content

[0003] The utility model aims to provide a multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester.

[0004] In order to achieve the purpose of the utility model, the technical solution provided by the utility model is as follows:

[0005] A multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester comprises a continuously variable speed change mechanism and a stepped gearbox connected to each other, wherein the output shaft of the stepped gearbox is connected to the shaft of an axial flow drum;

[0006] The continuously variable transmission mechanism includes a motor unit, a driving continuously variable wheel unit, a driven continuously variable wheel unit, and a fixing bracket for fixing the motor unit, the driving continuously variable wheel unit, and the driven continuously variable wheel unit, which are installed on the side plate; the driving continuously variable wheel unit is connected to the power output unit and can rotate under the drive of the power output unit;

[0007] The active continuously variable wheel unit includes an active continuously variable wheel consisting of an active continuously variable wheel fixing part and an active continuously variable wheel moving part, and the active continuously variable wheel moving part is connected to the motor unit, and driven by the motor unit to realize opening and closing movement relative to the active continuously variable wheel fixing part, so as to change the wheel diameter of the active continuously variable wheel;

[0008] The driven continuously variable wheel unit comprises a driven continuously variable wheel consisting of a driven continuously variable wheel fixing part and a driven continuously variable wheel moving part, and the driven continuously variable wheel moving part can automatically adjust the distance between it and the driven continuously variable wheel fixing part as the wheel diameter of the driving continuously variable wheel changes, so as to change the wheel diameter of the driven continuously variable wheel;

[0009] The driving continuously variable wheel and the driven continuously variable wheel are connected through a belt.

[0010] Wherein, the motor unit includes a servo motor with one end fixed on the side plate, the output shaft of the servo motor is connected to a driving sprocket, and the driving sprocket is connected to the driving continuously variable wheel unit through a chain.

[0011] The active continuously variable wheel unit further comprises a driven pulley connected to the power output unit, one end of the driven pulley is connected to the side plate through a first connecting shaft, and the other end is connected to the active continuously variable wheel fixing part, a shaft sleeve of the active continuously variable wheel fixing part is arranged at the center of the right end of the active continuously variable wheel fixing part, the active continuously variable wheel moving part is provided with a central through hole, and a shaft sleeve of the active continuously variable wheel moving part is extended to the right side of the central through hole, the shaft sleeve of the active continuously variable wheel fixing part passes through the central through hole and the shaft sleeve of the active continuously variable wheel moving part in sequence, and the active continuously variable wheel moving part A first bearing is sleeved on the outer side of the shaft sleeve, and one end of a sleeve with an internal thread is connected to the outer wall of the first bearing. A driven sprocket connected to the driving sprocket through a chain is arranged on the outer side of the sleeve with the internal thread, and the other end of the sleeve with the internal thread is threadedly connected to one end of the sleeve with an external thread, and the sleeve with the external thread is fixedly connected to the second end piece, and the second end piece is connected to the fixed bracket. The rotation of the driven sprocket drives the rotation of the sleeve with the internal thread, thereby realizing the lateral movement of the sleeve with the internal thread, and driving the active continuously variable wheel moving part to move along the shaft sleeve of the active continuously variable wheel fixed part.

[0012] Among them, two second bearings are arranged at intervals on the inner side of the sleeve with external thread, and the second connecting shaft passes through the through hole of the shaft sleeve of the active continuously variable wheel fixing part and the two second bearings in sequence.

[0013] Wherein, a first protrusion is arranged on the left side of the active continuously variable wheel moving part, a first groove is arranged on the right side of the active continuously variable wheel fixing part, and the first protrusion is inserted into the first groove and is slidably connected.

[0014] Among them, the driven continuously variable wheel unit includes a driven continuously variable wheel shaft with one end connected to the input shaft of the stepped transmission, and the other end of the driven continuously variable wheel shaft passes through the driven continuously variable wheel fixing part and the driven continuously variable wheel moving part, the limiting sleeve, and a spring in sequence, the limiting sleeve passes through the first end plate fixedly connected to the fixed bracket and is fixedly connected, the spring is sleeved on the limiting sleeve and the two ends are respectively connected to the first end plate and the driven continuously variable wheel moving part.

[0015] Wherein, the stepped transmission is a 3-speed transmission.

[0016] Compared with the prior art, the speed change structure provided by the utility model uses a continuously variable speed change mechanism and a stepped transmission together, which can meet the larger speed change range of the threshing device of the seed combine harvester, can greatly adapt to the harvesting of different types of multiple crops, and greatly improves the applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a structure for connecting a multi-stage speed change structure and an axial flow drum shaft for a threshing device of a multi-crop seed combine harvester provided in an embodiment of the present application;

[0018] In the figure, a continuously variable transmission mechanism 1, a stepped transmission input shaft 2, a stepped transmission 3, and an axial flow drum shaft 4;

[0019] Figure 2 A first schematic diagram of the structure of a continuously variable transmission mechanism provided in an embodiment of the present application;

[0020] In the figure, driven pulley 101, driven continuously variable wheel 102, servo motor 103, side plate 104, fixed bracket 105, driving sprocket 106, chain 107, driving continuously variable wheel 108, belt 109;

[0021] Figure 3 A second schematic diagram of the structure of the continuously variable transmission mechanism provided in an embodiment of the present application;

[0022] In the figure, a driven continuously variable wheel fixed part 1010, a driven continuously variable wheel moving part 1011, a first end piece 1012, a driven continuously variable wheel shaft 1013, a driving continuously variable wheel moving part 1014, a second end piece 1015, and a driving continuously variable wheel fixed part 1016;

[0023] Figure 4 A schematic diagram of the cross-sectional structure of a driven continuously variable wheel provided in an embodiment of the present application;

[0024] In the figure, the limiting sleeve 1026;

[0025] Figure 5 A schematic diagram of the active continuously variable wheel structure provided in an embodiment of the present application;

[0026] Figure 6 A schematic diagram of the cross-sectional structure of an active continuously variable wheel provided in an embodiment of the present application;

[0027] In the figure, a first connecting shaft 1017, a shaft sleeve 1018 of a driving stepless wheel fixed part, a first bearing 1019, a driven sprocket 1020, a shaft sleeve 1021 of a driving stepless wheel movable part, a second bearing 1022, a second connecting shaft 1023, a sleeve with an external thread 1024, and a sleeve with an internal thread 1025;

[0028] Figure 7 This is a schematic diagram of the structure of the driven pulley in the embodiment of the present application;

[0029] Figure 8 This is a first schematic diagram of the structure of the active continuously variable wheel fixing part in the embodiment of the present application;

[0030] Fig. 9 This is a second schematic diagram of the structure of the active continuously variable wheel fixing part in the embodiment of the present application;

[0031] Fig.10 This is a first schematic diagram of the structure of the active continuously variable wheel moving part in the embodiment of the present application;

[0032] Fig.11 This is a second schematic diagram of the structure of the active continuously variable wheel moving part in the embodiment of the present application. DETAILED DESCRIPTION

[0033] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected, set, or detachably connected, set, or integrally connected, set, and can refer to direct connection or indirect connection. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0036] like Figure 1-Figure 11 This is the embodiment structure of the present application.

[0037] like Figure 1 As shown, a multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester provided in this embodiment is arranged between a power output unit and the threshing device, and is used for changing the speed of the threshing device. The structure includes a continuously variable speed change mechanism 1 and a three-stage stepped transmission 3 connected to each other. The continuously variable speed change mechanism 1 is connected to the power output mechanism, and the output shaft of the stepped transmission 3 is connected to the axial flow drum shaft 4.

[0038] The continuously variable transmission mechanism 1 comprises a motor unit, a driving continuously variable wheel unit, a driven continuously variable wheel unit and a fixing bracket 105 for fixing the motor unit, the driving continuously variable wheel unit and the driven continuously variable wheel unit, which are installed on a side plate 104; the side plate 104 is installed on a combine harvester.

[0039] The active continuously variable wheel unit is connected to the power output unit and can rotate under the drive of the power output unit;

[0040] The active continuously variable wheel unit includes an active continuously variable wheel 108 composed of an active continuously variable wheel fixing part 1016 and an active continuously variable wheel moving part 1014 used in conjunction with each other, and the active continuously variable wheel moving part 1014 is connected to the motor unit, and driven by the motor unit to realize opening and closing movement relative to the active continuously variable wheel fixing part 1016, and adjust the distance between the two, so as to change the effective wheel diameter of the active continuously variable wheel 108;

[0041] The driven continuously variable wheel unit includes a driven continuously variable wheel 102 composed of a driven continuously variable wheel fixing part 1010 and a driven continuously variable wheel moving part 1011 used in conjunction with each other, and the driven continuously variable wheel moving part 1011 can automatically adjust the distance between it and the driven continuously variable wheel fixing part 1010 as the wheel diameter of the driving continuously variable wheel 108 changes, so as to change the wheel diameter of the driven continuously variable wheel, thereby realizing the speed change function of the continuously variable transmission mechanism;

[0042] The driving continuously variable wheel 108 is connected to the driven continuously variable wheel 102 via a belt 109 .

[0043] It should be noted that the speed change structure provided in the present application is installed on a seed combine harvester. The present application is an improvement on the existing combine harvester threshing device, and for the structures not described in detail, the known technology is adopted.

[0044] Preferably, the motor unit includes a servo motor 103 with one end fixed to the side plate 104, the output shaft of the servo motor 103 is connected to a driving sprocket 106, and the driving sprocket 106 is connected to the driving continuously variable wheel unit through a chain 107. The servo motor 103 drives the driving sprocket 106 to rotate, and the driving sprocket 106 drives the connecting part on the driving continuously variable wheel unit to rotate.

[0045] Preferably, the active continuously variable wheel unit also includes a driven pulley 101 connected to the power output unit, one end of the driven pulley 101 is connected to the side plate 104 through a first connecting shaft 1017, and the other end is connected to the active continuously variable wheel fixing part 1016, the active continuously variable wheel fixing part 1016 is provided with an active continuously variable wheel fixing part shaft sleeve 1018 at the center of the right end, the active continuously variable wheel moving part 1014 is provided with a central through hole and the active continuously variable wheel moving part shaft sleeve 1021 is extended to the right side of the central through hole, the active continuously variable wheel fixing part shaft sleeve 1018 passes through the central through hole and the active continuously variable wheel fixing part shaft sleeve 1021 in sequence The shaft sleeve 1021 of the wheel moving part, the outer side of the shaft sleeve 1021 of the active stepless wheel moving part is fixedly sleeved with a first bearing 1019, the outer side wall of the outer ring of the first bearing 1019 is fixedly connected with one end of a sleeve 1025 with an internal thread, the outer side of the sleeve 1025 with an internal thread is provided with a driven sprocket 1020 connected to the active sprocket 106 through a chain 107, the other end of the sleeve 1025 with an internal thread is threadedly connected with one end of a sleeve 1024 with an external thread, the sleeve 1024 with an external thread is fixedly connected with a second end piece 1015, and the second end piece 1015 is connected with a fixed bracket 105. The rotation of the driven sprocket 1020 drives the internal thread sleeve 1025 to rotate, thereby realizing the lateral movement of the internal thread sleeve 1025, and then drives the active stepless wheel moving part 1014 to move along the shaft sleeve 1018 of the active stepless wheel fixed part, thereby adjusting the distance between the two. In addition, two second bearings 1022 are spaced apart inside the externally threaded sleeve 1024, and the second connecting shaft 1023 passes through the through hole of the active continuously variable wheel fixing shaft sleeve 1018 and the two second bearings 1022 in sequence, so that the rotation of the driven pulley drives the active continuously variable wheel to rotate.

[0046] Preferably, a first protrusion is provided on the left side of the active continuously variable wheel moving part 1014, and a first groove is provided on the right side of the active continuously variable wheel fixing part 1016, and the first protrusion is inserted into the first groove and slidably connected to form a guide structure.

[0047] Preferably, the driven continuously variable wheel unit includes a driven continuously variable wheel shaft 1013, one end of which is connected to the stepped transmission input shaft 2, and the other end of the driven continuously variable wheel shaft 1013 passes through the driven continuously variable wheel fixing part 1010 and the driven continuously variable wheel moving part 1011, a limiting sleeve 1026, and a spring (not shown in the figure) in sequence, and the limiting sleeve 1026 passes through the first end piece 1012 fixedly connected to the fixed bracket 105 and is fixedly connected, and the spring has elastic force, which is sleeved on the limiting sleeve 1026 and its two ends are respectively connected to the first end piece 1012 and the driven continuously variable wheel moving part 1011.

[0048] It should be noted that the continuously variable transmission mechanism provided by the present application is installed on the side plate, and uses the rotation of the electric unit to drive the active sprocket and the driven sprocket to move synchronously. The driven sprocket drives the active continuously variable wheel moving part to move. When moving toward the active continuously variable wheel fixed part, the V-belt is gradually clamped, increasing the effective working diameter of the active continuously variable wheel, causing the V-belt to shift toward the active continuously variable wheel, thereby causing the driven continuously variable wheel moving part to move away from the driven continuously variable wheel fixed part, compressing the spring, and causing the effective working diameter of the driven continuously variable wheel to become smaller, thereby increasing the speed; similarly, when the electric unit rotates in the opposite direction, the speed is reduced, thereby realizing stepless speed regulation of the threshing drum, adapting to the needs of harvesting different crops, improving work efficiency and operating range, so as to solve the problem that restricts the harvesting of single crop seeds in my country and provide equipment support for the harvesting of multiple crop seeds.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate and explain the present invention, and are not intended to limit the present invention to the scope of the described embodiments. In addition, those skilled in the art can understand that the present invention is not limited to the above embodiments, and more variations and modifications can be made according to the teachings of the present invention, and these variations and modifications all fall within the scope of protection claimed by the present invention.

Claims

1. A multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester, characterized in that: It comprises a continuously variable transmission mechanism (1) and a stepped transmission gearbox (3) which are connected to each other, wherein the output shaft of the stepped transmission gearbox (3) is connected to an axial flow drum shaft (4); The continuously variable transmission mechanism (1) comprises a motor unit, a driving continuously variable wheel unit, a driven continuously variable wheel unit and a fixing bracket (105) for fixing the motor unit, the driving continuously variable wheel unit and the driven continuously variable wheel unit, which are installed on a side plate (104); the driving continuously variable wheel unit is connected to a power output unit and can rotate under the drive of the power output unit; The active continuously variable wheel unit comprises an active continuously variable wheel (108) consisting of an active continuously variable wheel fixing part (1016) and an active continuously variable wheel moving part (1014), and the active continuously variable wheel moving part (1014) is connected to a motor unit, and driven by the motor unit to realize an opening and closing movement relative to the active continuously variable wheel fixing part (1016), so as to change the wheel diameter of the active continuously variable wheel (108); The driven continuously variable wheel unit comprises a driven continuously variable wheel (102) composed of a driven continuously variable wheel fixing part (1010) and a driven continuously variable wheel moving part (1011), and the driven continuously variable wheel moving part (1011) can automatically adjust the distance between itself and the driven continuously variable wheel fixing part (1010) as the wheel diameter of the driving continuously variable wheel changes, so as to change the wheel diameter of the driven continuously variable wheel; The driving continuously variable wheel (108) and the driven continuously variable wheel (102) are connected via a belt (109).

2. The multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester according to claim 1, characterized in that: The motor unit comprises a servo motor (103) with one end fixed on a side plate (104); an output shaft of the servo motor (103) is connected to a driving sprocket (106); and the driving sprocket (106) is connected to a driving stepless wheel unit via a chain (107).

3. The multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester according to claim 2, characterized in that: The active continuously variable wheel unit further comprises a driven pulley (101) connected to the power output unit, one end of the driven pulley (101) being connected to the side plate (104) via a first connecting shaft (1017), and the other end being connected to the active continuously variable wheel fixing part (1016), a driving continuously variable wheel fixing part shaft sleeve (1018) being provided at the center of the right end of the active continuously variable wheel fixing part (1016), the active continuously variable wheel moving part (1014) being provided with a central through hole and a driving continuously variable wheel moving part shaft sleeve (1021) extending from the right side of the central through hole, the active continuously variable wheel fixing part shaft sleeve (1018) passing through the central through hole and the active continuously variable wheel moving part shaft sleeve (1021) in sequence, and a first bearing (1019) being sleeved on the outer side of the active continuously variable wheel moving part shaft sleeve (1021) The outer wall of the first bearing (1019) is connected to one end of an internally threaded sleeve (1025), and a driven sprocket (1020) connected to the driving sprocket (106) via a chain (107) is arranged on the outer side of the internally threaded sleeve (1025). The other end of the internally threaded sleeve (1025) is threadedly connected to one end of an externally threaded sleeve (1024). The externally threaded sleeve (1024) is fixedly connected to the second end piece (1015), and the second end piece (1015) is connected to the fixed bracket (105). The rotation of the driven sprocket (1020) drives the rotation of the internally threaded sleeve (1025), thereby realizing the lateral movement of the internally threaded sleeve (1025), and driving the active continuously variable wheel moving part (1014) to move along the shaft sleeve (1018) of the active continuously variable wheel fixed part.

4. The multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester according to claim 3, characterized in that: Two second bearings (1022) are arranged at intervals inside the externally threaded sleeve (1024), and the second connecting shaft (1023) passes through the through hole of the active stepless wheel fixing part shaft sleeve (1018) and the two second bearings (1022) in sequence.

5. The multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester according to claim 3, characterized in that: A first protrusion is arranged on the left side of the active continuously variable wheel moving part (1014), and a first groove is arranged on the right side of the active continuously variable wheel fixing part (1016), and the first protrusion is inserted into the first groove and is slidably connected.

6. A multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester according to any one of claims 1 to 5, characterized in that: The driven continuously variable wheel unit comprises a driven continuously variable wheel shaft (1013) having one end connected to the input shaft (2) of the stepless transmission; the other end of the driven continuously variable wheel shaft (1013) passes through the driven continuously variable wheel fixing part (1010), the driven continuously variable wheel moving part (1011), a limiting shaft sleeve (1026), and a spring in sequence; the limiting shaft sleeve (1026) passes through a first end plate (1012) fixedly connected to a fixing bracket (105) and is fixedly connected; the spring is sleeved on the limiting shaft sleeve (1026) and has two ends respectively connected to the first end plate (1012) and the driven continuously variable wheel moving part (1011).

7. The multi-stage speed change structure for a threshing device of a multi-crop seed combine harvester according to claim 6, characterized in that: The stepped transmission (3) is a 3-stage transmission.

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