Stepless speed change control device

Abstract

The utility model provides a stepless speed change control device which comprises a stepless speed changer, a connecting rod mechanism, a supporting plate, a fixing block, a pulling plate set and a driving mechanism, three non-collinear hinge points are arranged on the supporting plate, a first hinge point of the supporting plate is hinged to the fixing block, a second hinge point of the supporting plate is hinged to one end of the connecting rod mechanism, and the other end of the connecting rod mechanism is hinged to the pulling plate set. A third hinge point of the supporting plate is hinged with one end of the pulling plate group; the other end of the connecting rod mechanism is hinged to the control end of the continuously variable transmission. And the other end of the pulling plate group is hinged with the output end of the driving mechanism. According to the utility model, the power of the driving mechanism is transmitted through the connecting rod mechanism and the pulling plate group, so that the continuously variable transmission is convenient to control and does not need to be shut down during operation; the fixing block and the supporting plate restrain the swing amplitude of the connecting rod mechanism and the pulling plate set, the occupied space is small, the driving mechanism can be led out to an open position, and the fan stepless speed change control device is suitable for fan stepless speed change control carried by a harvester.

Description

Technical Field

[0001] The utility model relates to the technical field of speed change devices for harvester fans, and in particular to a stepless speed change control device. Background Art

[0002] Fans are essential equipment on harvesters, such as suction fans and exhaust fans. As parameters such as crop type, humidity and flow rate change during harvesting, the required speed of the fan also needs to be adjusted.

[0003] At present, a continuously variable transmission is generally arranged between the driving device and the fan. The driving device transmits power to the input end of the continuously variable transmission through a belt transmission mechanism, and the output end of the continuously variable transmission transmits power to the fan through a belt transmission mechanism. The continuously variable transmission includes a coaxially arranged movable plate and a fixed plate. The transmission belt is sleeved on the V-shaped groove between the movable plate and the fixed plate. The movable plate can be axially close to or away from the fixed plate, thereby changing the size of the V-shaped groove, so that different areas of the V-shaped groove contact the transmission belt and change the transmission ratio. Since the harvester is not designed with a separate control mechanism for the fan, when adjusting, it is necessary to first stop the harvester and then manually adjust the position of the movable plate of the continuously variable transmission. The operation is inconvenient and the adjustment efficiency is low, which affects the operating efficiency of the harvester. Utility Model Content

[0004] The technical problem to be solved by the utility model is: how to realize stepless speed control of a fan without stopping the harvester during operation.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] The utility model provides a continuously variable speed control device, comprising a continuously variable transmission, a connecting rod mechanism, a support plate, a fixed block, a pull plate group, and a driving mechanism. The support plate is provided with three non-collinear hinge points, the first hinge point of the support plate is hinged to the fixed block, the second hinge point of the support plate is hinged to one end of the connecting rod mechanism, and the third hinge point of the support plate is hinged to one end of the pull plate group; the other end of the connecting rod mechanism is hinged to the control end of the continuously variable transmission; the other end of the pull plate group is hinged to the output end of the driving mechanism.

[0007] The beneficial effects of the utility model are:

[0008] By adopting the utility model, the power of the driving mechanism is transmitted through the connecting rod mechanism and the pull plate group, which is convenient for controlling the continuously variable transmission, and there is no need to stop the machine during operation; the fixed block and the support plate constrain the swing amplitude of the connecting rod mechanism and the pull plate group, occupying a small space, and the driving mechanism can be led out to an open position, avoiding interference between the transmission structure and the fixed structure on the harvester, and is suitable for the continuously variable speed control of the fan carried by the harvester.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the output end of the driving mechanism includes a rotating shaft and a screw, and the screw can rotate around its own axis; the other end of the pull plate group is perpendicular to the rotating shaft and is rotatably connected, the screw penetrates the rotating shaft along the radial direction of the rotating shaft, and the screw is connected to the rotating shaft by a thread.

[0011] When the screw output rotates, the rotating shaft moves relative to the axis of the screw, thereby pulling or pushing the pull plate group to move, which is convenient for the support plate to swing and has high movement accuracy; when the screw stops moving, the rotating shaft and the support plate remain stationary, which is convenient for the continuously variable transmission to work stably; at the same time, the pull plate group can swing around the rotating shaft, so as to adapt to the movement component of the pull plate group in the direction perpendicular to itself, avoiding structural interference between the pull plate group and the support plate during the transmission process.

[0012] Furthermore, a limiting nut is sleeved on the screw rod, and the limiting nut is located between the rotating shaft and the driving mechanism.

[0013] It is convenient to avoid excessive movement of the rotating shaft and prevent the rotating shaft from colliding with the driving mechanism, and has good safety.

[0014] Furthermore, the driving mechanism includes a motor and a gear box, the motor is fixed on the gear box, and the gear box is rotationally connected to the screw rod; a transmission gear is provided in the gear box, and the transmission gear is connected to the screw rod through a key, and a driving gear is provided at the output end of the motor, and the driving gear is meshed with the transmission gear.

[0015] The gear box can be installed on the frame of the harvester and can be used to protect moving parts such as the motor, screw, and transmission gear. It is easy to install and improves safety. The motor drives the transmission gear, which transmits power to the screw, which is convenient for speed reduction transmission and makes the screw rotate smoothly, with good reliability.

[0016] Furthermore, one end of the screw rod passes through the gear box and is provided with an elastic pin.

[0017] It is convenient to constrain the gear box and prevent the gear box from moving along the axial direction of the screw, thereby improving transmission reliability.

[0018] Furthermore, two thrust bearings are sleeved on the screw rod, one of which is located between the outer wall of the gear box and the elastic pin, and the other is located between the inner wall of the gear box and the transmission gear.

[0019] The gear box is constrained by two thrust bearings, thereby preventing the gear box from moving axially along the screw rod; at the same time, the thrust bearings prevent the transmission gear and the elastic pin from rubbing against the gear box, thereby increasing the service life.

[0020] Furthermore, the gear box is also connected to a mounting seat.

[0021] The mounting base and the gear box can be fixedly connected or hinged by bolts, and the mounting base can be fixed on the frame of the harvester, which is easy to install, and the gear box is detachable, so the maintenance cost is low.

[0022] Furthermore, the pull plate group includes an adjustment plate and a connecting plate, one end of the adjustment plate is hinged to the third hinge point of the support plate, the other end of the adjustment plate partially overlaps with and is fixedly connected to one end of the connecting plate, and the other end of the connecting plate is rotatably connected to the rotating shaft.

[0023] The adjusting plate and the connecting plate can be installed separately and then connected, which is convenient for installation; it is easy to adapt to the distance between the driving mechanism and the supporting plate, and has good adaptability.

[0024] Furthermore, the connecting plate is provided with two overlapping parts, the adjusting plate is located between the two connecting plates, the two connecting plates are open to each other at one end away from the adjusting plate, the rotating shaft is located between the two connecting plates, and shaft heads are provided at both ends of the rotating shaft, and the shaft heads pass through the connecting plates.

[0025] The installation is convenient, and the two connecting plates are opened to limit the rotation axis, which has good stability.

[0026] Furthermore, the connecting rod mechanism includes a pull rod and a transition plate, one end of the pull rod is hinged to the second hinge point of the support plate, the other end of the pull rod is hinged to one end of the transition plate, and the other end of the transition plate is hinged to the control end of the continuously variable transmission.

[0027] When transmitting power, both the pull rod and the transition plate bear the pulling force, which is convenient for pulling the control end of the continuously variable transmission; through the transition plate, it is convenient to adapt to the swing of the support plate and avoid structural interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the utility model.

[0029] Figure 2 for Figure 1 Top view of the .

[0030] Figure 3 for Figure 2 An enlarged detail of the drive mechanism.

[0031] Figure 4 It is a structural diagram of the driving mechanism.

[0032] In the accompanying drawings, the technical features represented by the reference numerals are as follows:

[0033] 1-Continuously variable transmission; 101-pressure head; 102-moving plate; 103-fixed plate; 2-connecting rod mechanism; 21-pull rod; 22-transition plate; 3-support plate; 4-fixed block; 5-pull plate group; 51-adjusting plate; 52-connecting plate; 6-rotating shaft; 7-screw rod; 8-motor; 9-gear box; 10-transmission gear; 11-elastic pin; 12-thrust bearing; 13-mounting seat; 14-limiting nut. DETAILED DESCRIPTION

[0034] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0035] This utility model refers to Figure 1-4 .

[0036] The utility model provides a continuously variable speed control device, comprising a continuously variable transmission 1, a connecting rod mechanism 2, a support plate 3, a fixed block 4, a pull plate group 5, and a driving mechanism. The support plate 3 is provided with three non-collinear hinge points, the first hinge point of the support plate 3 is hinged to the fixed block 4, the second hinge point of the support plate 3 is hinged to one end of the connecting rod mechanism 2, and the third hinge point of the support plate 3 is hinged to one end of the pull plate group 5; the other end of the connecting rod mechanism 2 is hinged to the control end of the continuously variable transmission 1; the other end of the pull plate group 5 is hinged to the output end of the driving mechanism.

[0037] principle:

[0038] The utility model is used to control a continuously variable transmission 1 of a fan mounted on a harvester. The continuously variable transmission 1 is a prior art. For example, the fan of the harvester can adopt a continuously variable transmission 1 of model GKV2305020001. The continuously variable transmission 1 includes a moving plate 102 and a fixed plate 103. The moving plate 102 can change the actual transmission diameter of the continuously variable transmission 1 by moving it closer to or farther from the fixed plate 103 along the axial direction, thereby changing the transmission ratio. Figure 1 Take the orientation as an example: the control end of the continuously variable transmission 1 is a pressure head 101. When the pressure head 101 is subjected to a downward pulling force, the pressure head 101 swings downward and pushes the movable plate 102 close to the fixed plate 103; when the external force of the pressure head 101 disappears, under the action of the transmission belt pressure, the movable plate 102 and the pressure head 101 retreat upward.

[0039] In the installed state, the continuously variable transmission 1 is arranged near the fan of the harvester and connected to the fan through a belt drive; the fixing block 4 is fixed to the frame of the harvester; the driving mechanism is led out to an open position through the connecting rod mechanism 2 and the pull plate group 5, and the driving mechanism is fixed to the frame of the harvester. The driving mechanism can adopt a crank slider mechanism of the motor 8, a telescopic rod, etc.

[0040] In the working state, the output end of the driving mechanism applies a pulling force to the pull plate group 5, the pull plate group 5 pulls the support plate 3 to swing around the hinge axis of the fixed block 4, the support plate 3 pulls the connecting rod mechanism 2, and the connecting rod mechanism 2 transmits the pulling force to the control end of the continuously variable transmission 1, thereby controlling the continuously variable transmission 1. When the continuously variable transmission 1 is at any position, the driving mechanism stops moving, then the connecting rod mechanism 2 and the pull plate group 5 remain stationary, so that the transmission ratio of the continuously variable transmission 1 remains unchanged and works stably.

[0041] In summary, by adopting the utility model, the power of the driving mechanism is transmitted through the connecting rod mechanism 2 and the pull plate group 5, which is convenient for controlling the continuously variable transmission 1, and there is no need to stop the machine during operation; the fixed block 4 and the support plate 3 constrain the swing amplitude of the connecting rod mechanism 2 and the pull plate group 5, occupying a small space, and being able to lead the driving mechanism to an open position, avoiding interference between the transmission structure and the fixed structure on the harvester, and is suitable for the continuously variable speed control of the fan carried by the harvester.

[0042] Further, such as Figure 1-3 As shown: the output end of the driving mechanism includes a rotating shaft 6 and a screw 7, and the screw 7 can rotate around its own axis; the other end of the pull plate group 5 is perpendicular to and rotatably connected to the rotating shaft 6, the screw 7 penetrates the rotating shaft 6 along the radial direction of the rotating shaft 6, and the screw 7 is connected to the rotating shaft 6 by a thread.

[0043] Note: The driving mechanism can be a motor 8 connected to the screw 7 to output rotation.

[0044] When the screw 7 outputs rotation, the rotating shaft 6 moves relative to the axis of the screw 7, thereby pulling or pushing the pull plate group 5 to move, which is convenient for the support plate 3 to swing and has high movement accuracy; when the screw 7 stops moving, the rotating shaft 6 and the support plate 3 stay still, which is convenient for the continuously variable transmission 1 to work stably; at the same time, the pull plate group 5 can swing around the rotating shaft 6, so as to adapt to the movement component of the pull plate group 5 in the direction perpendicular to itself, avoiding structural interference between the pull plate group 5 and the support plate 3 during the transmission process.

[0045] Furthermore, a limiting nut 14 is sleeved on the screw rod 7 , and the limiting nut 14 is located between the rotating shaft 6 and the driving mechanism.

[0046] It is convenient to avoid excessive movement of the rotating shaft 6 and prevent the rotating shaft 6 from colliding with the driving mechanism, and the safety is good.

[0047] Further, such as Figure 1-4 As shown: the driving mechanism includes a motor 8 and a gear box 9, the motor 8 is fixed on the gear box 9, and the gear box 9 is rotationally connected to the screw 7; a transmission gear 10 is arranged in the gear box 9, and the transmission gear 10 is connected to the screw 7 through a key, and a driving gear is arranged at the output end of the motor 8, and the driving gear is meshed with the transmission gear 10.

[0048] The gear box 9 can be installed on the frame of the harvester and can be used to protect moving parts such as the motor 8, the screw 7, and the transmission gear 10. It is easy to install and improves safety. The motor 8 drives the transmission gear 10, and the transmission gear 10 transmits power to the screw 7, which is convenient for speed reduction transmission and makes the screw 7 rotate smoothly, with good reliability.

[0049] Further, such as Figure 2-3 As shown: one end of the screw rod 7 passes through the gear box 9 and is provided with an elastic pin 11.

[0050] It is convenient to constrain the gear box 9, prevent the gear box 9 from moving along the axial direction of the screw rod 7, and the transmission reliability is good.

[0051] Further, such as Figure 3 As shown, two thrust bearings 12 are also sleeved on the screw rod 7, one of the thrust bearings 12 is located between the outer wall of the gear box 9 and the elastic pin 11, and the other thrust bearing 12 is located between the inner wall of the gear box 9 and the transmission gear 10.

[0052] Preferably, the thrust bearing 12 is a thrust needle roller bearing.

[0053] The two thrust bearings 12 constrain the gear box 9, thereby preventing the gear box 9 from moving axially along the screw rod 7; at the same time, the thrust bearings 12 prevent the transmission gear 10 and the elastic pin 11 from rubbing against the gear box 9, thereby increasing the service life.

[0054] Further, such as Figure 1-2 As shown: the gear box 9 is also connected to a mounting seat 13.

[0055] The mounting seat 13 and the gear box 9 can be fixedly connected or hinged by bolts, and the mounting seat 13 can be fixed on the frame of the harvester, which is easy to install, and the gear box 9 is detachable, with low maintenance cost.

[0056] Further, such as Figure 1-3 As shown: the pulling plate group 5 includes an adjusting plate 51 and a connecting plate 52, one end of the adjusting plate 51 is hinged to the third hinge point of the supporting plate 3, the other end of the adjusting plate 51 partially overlaps with and is fixedly connected to one end of the connecting plate 52, and the other end of the connecting plate 52 is rotatably connected to the rotating shaft 6.

[0057] The adjusting plate 51 and the connecting plate 52 can be installed separately and then connected, which is convenient for installation; it is easy to adapt to the distance between the driving mechanism and the supporting plate 3, and has good adaptability.

[0058] Further, such as Figure 2-3As shown: the connecting plate 52 is provided with two overlapping parts, the adjusting plate 51 is located between the two connecting plates 52, the two connecting plates 52 are open to each other at one end away from the adjusting plate 51, the rotating shaft 6 is located between the two connecting plates 52, and shaft heads are provided at both ends of the rotating shaft 6, and the shaft heads pass through the connecting plates 52.

[0059] Preferably, the adjustment plate 51 and the connecting plate 52 are connected by bolts.

[0060] The installation is convenient, and the two connecting plates 52 are opened to limit the rotation shaft 6, so the stability is good.

[0061] Further, such as Figure 1 As shown: the connecting rod mechanism 2 includes a pull rod 21 and a transition plate 22, one end of the pull rod 21 is hinged to the second hinge point of the support plate 3, the other end of the pull rod 21 is hinged to one end of the transition plate 22, and the other end of the transition plate 22 is hinged to the control end of the continuously variable transmission 1.

[0062] When transmitting power, both the pull rod 21 and the transition plate 22 bear the pulling force, which is convenient for pulling the control end of the continuously variable transmission 1; through the transition plate 22, it is convenient to adapt to the swing of the support plate 3 and avoid structural interference.

[0063] In the description of the present invention, it should be understood that if there are descriptive terms indicating orientation, direction or positional relationship, such as: "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated in this specification is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of understanding the present invention and simplifying the description, and does not indicate or imply that the referred part, element or whole must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0064] In addition, if there are order description terms, such as "first", "second", etc., their purpose in this specification is to facilitate understanding or simplify description. For example, in order to distinguish multiple technical features of the same type or function, but they have to be mentioned separately, this specification may use prefix or suffix order description terms to distinguish them. Therefore, it cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present utility model, if the terms describing the relative functional relationship of the structures are used, such as "install", "connect", "connect", "fix", etc., they should be understood in a broad sense unless otherwise clearly specified and limited. For example, "install", "connect", "connect", etc. can be a fixed connection, a detachable connection, or an integrated one; can be a mechanical connection or an electrical connection; can be a direct connection or an indirect connection through an intermediate medium, can be the internal connection of two elements or the interaction relationship between two elements; "fix" can be an integrated fixation or a detachable fixation through fasteners; can be a direct fixation or a fixation through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above-mentioned descriptive terms in the present utility model can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0066] In the present invention, if there are descriptive terms with subsidiary or connecting meanings, for example, a first feature is "on" or "below" a second feature, unless otherwise clearly specified and limited, it should not be understood in a restrictive manner. For example, "on" or "below" may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above descriptive terms in the present invention can be understood according to the specific circumstances, the context, the coherence of the context, etc.

[0067] Furthermore, the first feature being “above”, “above”, and “above” the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being “below”, “below”, and “below” the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and combine the different embodiments, examples and features of the different embodiments and examples described in this specification without contradiction, and these combinations or combinations shall all fall within the scope summarized by the utility model.

[0069] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are illustrative and cannot be construed as limitations on the present invention. A person skilled in the art can change, modify, replace and modify the above embodiments within the scope of information available from public channels and in combination with the technical inspiration provided by the present application documents.

Claims

1. A continuously variable speed control device, characterized in that: The invention comprises a continuously variable transmission (1), a connecting rod mechanism (2), a support plate (3), a fixed block (4), a pull plate group (5), and a driving mechanism. The support plate (3) is provided with three non-collinear hinge points, the first hinge point of the support plate (3) is hinged to the fixed block (4), the second hinge point of the support plate (3) is hinged to one end of the connecting rod mechanism (2), and the third hinge point of the support plate (3) is hinged to one end of the pull plate group (5); the other end of the connecting rod mechanism (2) is hinged to the control end of the continuously variable transmission (1); and the other end of the pull plate group (5) is hinged to the output end of the driving mechanism.

2. The continuously variable speed control device according to claim 1, characterized in that: The output end of the driving mechanism comprises a rotating shaft (6) and a screw (7), and the screw (7) can rotate around its own axis; the other end of the pull plate group (5) is vertically and rotationally connected to the rotating shaft (6), the screw (7) penetrates the rotating shaft (6) along the radial direction of the rotating shaft (6), and the screw (7) is connected to the rotating shaft (6) by a thread.

3. The continuously variable speed control device according to claim 2, characterized in that: The screw rod (7) is also sleeved with a limiting nut (14), and the limiting nut (14) is located between the rotating shaft (6) and the driving mechanism.

4. The continuously variable speed control device according to claim 2, characterized in that: The driving mechanism comprises a motor (8) and a gear box (9), the motor (8) is fixed on the gear box (9), and the gear box (9) is rotationally connected to the screw rod (7); A transmission gear (10) is arranged in the gear box (9), and the transmission gear (10) is connected to the screw rod (7) via a key. A driving gear is arranged at the output end of the motor (8), and the driving gear is meshed with the transmission gear (10).

5. The continuously variable speed control device according to claim 4, characterized in that: One end of the screw rod (7) passes through the gear box (9) and is provided with an elastic pin (11).

6. The continuously variable speed control device according to claim 5, characterized in that: The screw rod (7) is also sleeved with two thrust bearings (12), one of which is located between the outer wall of the gear box (9) and the elastic pin (11), and the other is located between the inner wall of the gear box (9) and the transmission gear (10).

7. The continuously variable speed control device according to claim 4, characterized in that: The gear box (9) is also connected to a mounting seat (13).

8. The continuously variable speed control device according to claim 2, characterized in that: The pull plate group (5) comprises an adjustment plate (51) and a connecting plate (52); one end of the adjustment plate (51) is hinged to the third hinge point of the support plate (3); the other end of the adjustment plate (51) partially overlaps with and is fixedly connected to one end of the connecting plate (52); the other end of the connecting plate (52) is rotatably connected to the rotating shaft (6).

9. The continuously variable speed control device according to claim 8, characterized in that: The connecting plate (52) is provided with two overlapping parts, the adjusting plate (51) is located between the two connecting plates (52), the ends of the two connecting plates (52) away from the adjusting plate (51) are open to each other, the rotating shaft (6) is located between the two connecting plates (52), and shaft heads are provided at both ends of the rotating shaft (6), and the shaft heads penetrate the connecting plates (52).

10. The continuously variable speed control device according to claim 1, characterized in that: The connecting rod mechanism (2) comprises a pull rod (21) and a transition plate (22), one end of the pull rod (21) is hinged to the second hinge point of the support plate (3), the other end of the pull rod (21) is hinged to one end of the transition plate (22), and the other end of the transition plate (22) is hinged to the control end of the continuously variable transmission (1).

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