Planetary structure driving box for tool bit of agricultural harvester

Abstract

The utility model relates to an agricultural harvester tool bit planetary structure driving box, which belongs to the technical field of driving boxes and comprises an upper shell and a lower shell, a trapezoidal claw seat is mounted at the lower end of the lower shell, and a trapezoidal claw assembly is mounted at the lower end of the trapezoidal claw seat. And a transmission mechanism for driving the trapezoidal claw seat to rotate is mounted on the outer side of the input shaft and on the lower shell. In order to meet the market requirements of the harvester, belt wheel input is adopted, speed reduction is achieved through a first-stage bevel gear, and then input circular motion is converted into linear reciprocating motion through a special planetary mechanism. Belt wheel input is achieved, and the structure is simple and efficient; the transmission precision requirement is low, and power take-off is convenient; the device has the function of a flywheel and bevel gear transmission, and is compact in structure; the transmission torque is large; the rotation direction is changed, the structural layout is optimized, a planetary gear transmission mechanism is adopted, and circular motion is converted into reciprocating linear motion without lateral motion; the transmission power of the planetary structure is large.

Description

TECHNICAL FIELD

[0001] The utility model relates to drive box technical field, specifically point to a kind of agricultural harvester cutter head planetary structure drive box. BACKGROUND

[0002] When combine harvester works, the harvester moves forward, and the cutter head makes transverse cutting movement, cuts the harvesting part of crops and inputs the harvester for subsequent processing.The cutter head drive box converts the circumferential movement from the engine into linear reciprocating motion of the cutter head.The most common cutter head drive mechanism includes crank connecting rod mechanism, swing ring mechanism and crank sliding slot mechanism, etc.Among them, the swing ring mechanism is widely used in large combine harvesters due to its stable movement and large transmission power, and its working principle is to convert the circular movement into planar reciprocating motion by using swing ring, swing fork and eccentric principle.However, the planar reciprocating motion output by the swing ring mechanism is not pure linear reciprocating motion, and there is lateral movement;And the swing ring product has the disadvantage of large volume and heavy weight;While the planetary structure can output reciprocating linear motion without lateral movement, and has the advantages of small volume and light weight;With the continuous development of technology, the advantages of involute planetary gear transmission mechanism cutter head box are more and more obvious, and it has been paid attention by combine harvester manufacturers, and the development and application of involute planetary gear transmission mechanism instead of traditional swing ring box has been included in the schedule of harvester production enterprises. SUMMARY

[0003] The utility model solves the above technical problem, and provides a kind of agricultural harvester cutter head planetary structure drive box.

[0004] To solve the above technical problem, the technical scheme provided by the utility model is:

[0005] A kind of agricultural harvester cutter head planetary structure drive box, including upper shell and lower shell, rotatable input shaft is installed in the upper shell, one end of the input shaft is connected with the pulley of driving input shaft rotation

[0006] The lower end of the lower shell is installed with trapezoidal claw base, and the lower end of the trapezoidal claw base is installed with trapezoidal claw assembly;

[0007] The outer side of the input shaft and located on the lower shell are installed with the transmission mechanism of driving trapezoidal claw base rotation.

[0008] Preferably, one end of the pulley is connected with a transition disc through a screw group.

[0009] Preferably, the transmission mechanism includes input bevel gear of input shaft and planetary carrier, driven bevel gear is installed on the planetary carrier and driven bevel gear and input bevel gear are engagedly connected.

[0010] Preferably, the lower shell is internally provided with a gear ring and a planet carrier is located in the gear ring, the planet carrier is internally provided with a movable shaft, the movable shaft is externally provided with a planet wheel and the planet wheel can revolve and rotate in the gear ring.

[0011] Preferably, the planet wheel and the trapezoidal claw base are fixedly connected through screws.

[0012] Preferably, the trapezoidal claw assembly is clamped into the trapezoidal claw base through a trapezoidal structure groove and then is locked through a hexagonal flange bolt.

[0013] Preferably, the input shaft is connected to the upper shell through a bearing.

[0014] Preferably, the lower shell and the upper shell are connected into an integral whole through a cylindrical pin two and a screw group two.

[0015] After the above structure is adopted, the utility model has the following advantages:

[0016] The utility model discloses a market requirement for the harvester, adopts a wheel input, passes through a first bevel gear and reduces, and then through special planet mechanism, converts the input circumferential motion into linear reciprocating motion.Wheel input, simple structure and high efficiency; transmission precision requirement is low, and power is convenient to take; the moment of inertia is relatively large, and the flywheel effect is compatible, and the bevel gear transmission is compact in structure; transmission moment is relatively large; change rotates the direction, and the structure layout is optimized, and the planet gear transmission mechanism converts the circumferential motion into reciprocating linear motion and does not have the lateral motion; the planet structure transmission power is relatively large.

[0017] The above summary is merely intended to illustrate the present description and is not intended to limit in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features will be readily apparent to those skilled in the art from the drawings and detailed description of the application. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0019] Figure 1 It is a structural schematic view of the utility model.

[0020] Figure 2 It is a structural schematic view of the transmission mechanism of the utility model.

[0021] Figure 3 It is a structural schematic view of the utility model in section.

[0022] Figure 4 is a sectional view of the utility model.

[0023] Figure 5 is the installation schematic view of the trapezoidal claw assembly of the utility model.

[0024] As shown in the figure: 1, lock pin;2, pulley;3, small round nut 1;4, small round nut stop retreat pad 2;5, input shaft;6, flat key 1;7, screw group 1;8, transition disc;9, lower shell;10, bearing 1;11, input bevel gear;12, adjustment pad 1;13, grease nipple 1;14, double row angular contact ball bearing 1;15, hole block 1;16, small round nut 2;17, small round nut stop retreat pad 2;18, spacer;19, muff cover;20, lock nut;21, driven bevel gear;22, flat key 2;23, planet carrier;24, screw group 2;25, bearing 2;26, cylindrical pin 2;27, hole block 2;28, O-ring;29, lower shell;30, long needle bearing;31, elastic cylindrical pin;32, ring gear;33, bearing 3;34, packing;35, double row angular contact ball bearing 2;36, cylindrical pin 3;37, inner hexagonal screw;38, planet wheel;39, hole block 3;40, packing;41, trapezoidal claw base;42, trapezoidal claw assembly;43, grease nipple 2;44, jackscrew;45, screw group 3;46, hexagonal flange bolt;47, trapezoidal claw;48, grease nipple 3;49, washer;50, cutter head bearing;51, inner hexagonal screw 2;52, end cover;53, steel sleeve;54, movable shaft. DETAILED DESCRIPTION

[0025] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation to the present application.

[0026] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or integrally connected;Can be mechanically connected, or electrically connected;Can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] The utility model is further described in detail below in combination with the whole text.

[0028] In combination with the drawings Figures 1-5A planetary structure drive box for a combine harvester blade includes an upper housing 9 and a lower housing 29. A rotatable input shaft 5 is installed inside the upper housing 9. One end of the input shaft 5 is connected to a pulley 2 that drives the input shaft 5 to rotate. In this specific implementation, the pulley 2 is used for input transmission. A screw assembly 7 fixes the pulley 2 and the transition disc 8 into one unit. Then, the transmission is transmitted to the input shaft 5 and the input bevel gear 11 via a key 6. Then, the transmission is reversed by the bevel gear and transmitted to the driven bevel gear 21. Then, a key 22 drives the planetary carrier 23 to rotate. Then, the planetary gears 38 revolve and rotate within the gear ring 32. Then, the trapezoidal claw seat 41 rotates, and the output is transmitted through the trapezoidal claw assembly 42. The lower housing 29 and the housing 29 are connected as a whole by a cylindrical pin 26 and a screw assembly 24.

[0029] In a specific implementation of this utility model, the small round nut 3 presses the pulley 2, transition disc 8, bearing 10, input bevel gear 11, and adjusting shim 12 onto the shoulder of the input shaft 5; the input shaft 5, transition disc 8, and input bevel gear 11 have keyways and are connected together by a flat key 6 to transmit torque; the adjusting shim 12 is used to adjust the meshing clearance between the input bevel gear 11 and the driven bevel gear 21, and can be used or not; the small round nut anti-loosening shim 4 is used to prevent the nut from loosening.

[0030] A trapezoidal claw seat 41 is mounted on the lower end of the lower housing 29, and a trapezoidal claw assembly 42 is mounted on the lower end of the trapezoidal claw seat 41. A transmission mechanism for driving the trapezoidal claw seat 41 to rotate is mounted on the outside of the input shaft 5 and on the lower housing 29. One end of the pulley 2 is connected to a transition disc 8 via a screw assembly 17. The transmission mechanism includes an input bevel gear 11 on the input shaft 5 and a planetary carrier 23. A driven bevel gear 21 is mounted on the planetary carrier 23, and the driven bevel gear 21 and the input bevel gear 11 are meshed together. The double-row angular contact ball bearing 14, together with the lower housing 29, the bore stop 15, the small round nut 16, and the small round nut anti-loosening washer 17, axially limit the input shaft 5, thereby determining the axial position of the input shaft 5, the input bevel gear 11, and other components within the lower housing 29. The driven bevel gear 21 is fixed together with the planetary carrier 23 via the flat key 22. Then, it is tightened by the lock nut 20, which is prevented from loosening by the anti-loosening pin 1 breaking the thread. Finally, the bearing 25 and the bearing 33 provide load bearing and axial and radial limiting.

[0031] In a specific implementation of this utility model, a gear ring 32 is installed inside the lower housing 29 and a planetary carrier 23 is located inside the gear ring 32. The gear ring 32 is fixed to the housing by an elastic cylindrical pin 31 and a screw assembly 45. A movable shaft 54 ​​is installed on the planetary carrier 23. A planetary gear 38 is installed on the outside of the movable shaft 54 ​​and can revolve and rotate within the gear ring 32.

[0032] The utility model discloses in the specific implementation, planetary gear 38 and trapezoidal claw base 41 are fixedly connected through screw 37. Planetary gear 38 and trapezoidal claw base 41 are fixed into an integral whole through internal hexagonal screw one 37, and there is the ridge of flat key shape on the shear-resistant structure planetary gear end face between cylindrical pin three 36 and planetary gear 38 and trapezoidal claw base 41, and the trapezoidal claw end face has radial key groove, and the both male and female mutually cooperate shear-resistant transmission torque. Planetary gear 38 and trapezoidal claw base 41 are carried and positioned in radial direction through long needle roller bearing 30 and double row angular contact ball bearing two 35, and double row angular contact ball bearing two 35 also has axial limiting effect. It is worth paying special attention to: long needle roller bearing 30 adopts long needle structure, to ensure that bearing bears force, and to ensure that the planetary carrier outer diameter of corresponding position of planetary carrier 23, i.e. long needle bearing installation position, is passed through the small diameter of gear ring 32.

[0033] Trapezoidal claw assembly 42 is clamped into trapezoidal claw base 41 through special trapezoidal structure, and then is locked through hexagonal flange bolt 46.

[0034] The cutter head bearing 50 adopts a special combined bearing structure, the bearing itself is a double-row tapered roller bearing installed face to face, which can bear a large radial load and a certain amount of axial load; the outer ring of the cutter head bearing 50 has a spherical surface, which forms a spherical bearing structure with the inner spherical surface of the steel sleeve 53, thereby reducing the concentricity requirement during assembly and improving the fault tolerance rate during main machine assembly; the steel sleeve 53 has several small grooves uniformly distributed at the opening, the length of the small grooves is over the highest point of the inner spherical surface of the steel sleeve, so that the inner spherical surface of the steel sleeve 53 can be smoothly assembled onto the outer spherical surface of the cutter head bearing 50; during the process of pressing the steel sleeve 53 into the cutter head bearing 50, the opening of the steel sleeve 53 is first expanded and then reset; during use, the spherical bearing structure formed by the inner and outer spherical surfaces will have a certain ankle movement; in order to ensure the use and service life of the steel sleeve 53, the steel sleeve is made of 65Mn material with good elasticity, and the surface hardness is improved through heat treatment to improve the wear resistance.

[0035] Trapezoidal claw assembly 42 is clamped into trapezoidal claw base 41 through trapezoidal structure groove, and then is locked through hexagonal flange bolt 46.

[0036] In the specific implementation, the product adopts grease lubrication, and the main part is pumped and lubricated through the grease nipple one 13; considering that the long needle bearing 30 is located in a position where oil cannot flow smoothly, the lubrication may not be sufficient, and especially the grease nipple two 43 is used for supplementary lubrication; all bearings of the main part except the long needle bearing 30 adopt a sealed maintenance-free structure, so that contaminated grease cannot enter the bearing and the service life of the bearing is reduced.

[0037] At the same time, since the harvester works, the dust is relatively large, so the packing 34 and the cover 19 are used for dust prevention.

[0038] The tool head bearing assembly is grease lubricated, grease is pumped in through a grease nipple 348, reaches the middle position of the inner ring of the tool head bearing 350 through the special oil channel of the trapezoidal claw 347, the inner ring position of the bearing is designed with an oil passing hole, the grease can reach the position of the bearing ball through the oil passing hole, thereby lubricating the shaft; the bearing has sealing structure on both sides to prevent grease leakage.

[0039] The planetary gear transmission mechanism for the harvester tool head is mainly composed of a shell, an inner ring fixed with the shell, a planet carrier, a planet gear, a crank mechanism, an output mechanism and the like, and the main working component is the planet gear. When working, the planet gear rotates around the center of the big gear ring (revolution) and also rotates (rotation) under the action of the big gear ring. When a reasonable parameter is selected, the points on the planet gear pitch circle move along a straight line, and the other points move in irregular curves. In order to make the output of the planet gear transmission mechanism have a straight line characteristic, two points must be ensured: ① the number of teeth of the fixed inner ring is twice the number of teeth of the planet gear; ② the center distance of the planet carrier = the length of the crank mechanism = the eccentric length of the trapezoidal claw seat = the pitch circle radius of the planet gear = the pitch circle radius of the inner ring / 2. Under the joint constraints of the two conditions, the revolution angle of the planet gear is always half of the rotation angle of the planet gear at the same time; the points on the pitch circle move along a straight line. If the theoretical point of the output end (tool head) is fixed on the pitch circle of the planet gear, the movement trajectory is the straight line movement through the center of the fixed inner ring.

[0040] The above describes the utility model and its implementation mode, which is not limited, and the shown in the full text is only one of the implementation modes of the utility model, and the actual structure is not limited. In summary, if a person skilled in the art is inspired, without departing from the creative purpose of the utility model, without creative design, similar structure modes and examples of the technical scheme should belong to the protection scope of the utility model.

Claims

1. An agricultural harvester cutterhead planetary structure drive case characterized by, It comprises an upper shell (9) and a lower shell (29), the upper shell (9) is internally provided with a rotatable input shaft (5), one end of the input shaft (5) is connected with a belt pulley (2) for driving the input shaft (5) to rotate; The lower end of the lower shell (29) is provided with a trapezoidal claw base (41), the lower end of the trapezoidal claw base (41) is provided with a trapezoidal claw assembly (42); The outer side of the input shaft (5) and the lower shell (29) are provided with a transmission mechanism for driving the trapezoidal claw base (41) to rotate.

2. An agricultural harvester cutterhead planetary structure drive case according to claim 1, characterized by: One end of the belt pulley (2) is connected with a transition disc (8) through a screw group (7).

3. The planetary drive head for an agricultural harvester according to claim 1, wherein: The transmission mechanism comprises an input bevel gear (11) of the input shaft (5) and a planet carrier (23), the planet carrier (23) is provided with a driven bevel gear (21), and the driven bevel gear (21) and the input bevel gear (11) are meshingly connected.

4. The planetary drive head for an agricultural harvester according to claim 1, wherein: The lower shell (29) is internally provided with a ring gear (32), and the planet carrier (23) is located in the ring gear (32), the planet carrier (23) is provided with a movable shaft (54), the outer side of the movable shaft (54) is provided with a planet wheel (38), and the planet wheel (38) can revolve and rotate in the ring gear (32).

5. An agricultural harvester cutterhead planetary structure drive box according to claim 4, characterized in that: The planet wheel (38) and the trapezoidal claw base (41) are fixedly connected through an internal hexagonal screw (37).

6. The planetary drive head for an agricultural harvester according to claim 1, wherein: The trapezoidal claw assembly (42) is clamped into the trapezoidal claw base (41) through a trapezoidal structure groove, and then locked through a hexagonal flange bolt (46).

7. The planetary drive head for an agricultural harvester according to claim 1 wherein: The input shaft (5) is connected with the upper shell (9) through a bearing.

8. The planetary drive head for an agricultural harvester according to claim 1, wherein: The lower shell (29) and the upper shell (9) are connected into an integral whole through a cylindrical pin (26) and a screw group (24).

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