flywheel mechanism

Abstract

The application relates to a flywheel mechanism, which comprises a gearbox shaft for receiving and outputting power, a flywheel for transmitting the power of a driving device in a bundling device, and a shear member for transmitting the power between the gearbox shaft and the flywheel; a through linkage cavity is formed in the middle of the flywheel, and a plurality of shear holes are formed around the linkage cavity on the flywheel; a fastener is arranged on the shear member, the shear member is fixed in at least one shear hole through the fastener; an inner linkage key is formed in the middle of the shear member; a spline sleeve is further arranged at the end of the gearbox shaft facing the shear member, the spline sleeve is detachably connected with the inner linkage key through an outer spline, and the spline sleeve is detachably connected with the gearbox shaft through an inner spline. After being separated, the shear member no longer rotates with the flywheel, the spline sleeve is engaged with the gearbox shaft through the inner spline and is axially fixed by a shaft cover, even if the shear member is displaced, the flywheel is still firmly fixed on the gearbox shaft by the spline sleeve, and the flywheel is prevented from falling off.

Description

Technical Field

[0001] This application relates to the field of baling equipment technology, and in particular to a flywheel mechanism. Background Technology

[0002] The flywheel fixing mechanism of a baler is a core component ensuring the stability of equipment transmission and operational safety. Its structural design not only achieves efficient power transmission but also prevents damage to the equipment due to overload through a unique safety mechanism. During baling operations, the tractor drives the flywheel to rotate, accumulating energy to power bale formation. While providing power to the bales, the flywheel is also subject to the reaction force of the bales. Overload reaction force protects the power system by preventing the safety bolts on the flywheel from breaking. Breaking the shear bolts can cause the flywheel fasteners to loosen, and loose fasteners are the main cause of flywheel detachment, leading to serious operational accidents.

[0003] In related technologies, the flywheel is designed between the gearbox and the drive shaft and is fixed to the gearbox input shaft by fasteners. When overloaded, the fasteners shear the safety bolts and fit tightly against the flywheel to fix it. At this time, the rotation of the flywheel continuously impacts the fasteners, making the bolts easy to loosen. Utility Model Content

[0004] Therefore, it is necessary to provide a flywheel mechanism to address the current design where the flywheel is located between the gearbox and the drive shaft and is fixed to the gearbox input shaft by fasteners. When overloaded, the fasteners shear the safety bolts and tightly adhere to the flywheel for fixation. At this time, the rotating flywheel continuously impacts the fasteners, making the bolts prone to loosening.

[0005] According to one aspect of this application, a flywheel mechanism is provided for a baling device, comprising: a flywheel for connection to a drive device in the baling device, the drive device driving the flywheel to rotate; a gearbox shaft connected to the flywheel and for driving the gearbox shaft to rotate; and a shear member connecting the gearbox shaft and the flywheel; the flywheel driving the gearbox shaft to rotate via the shear member.

[0006] The flywheel has a through-hole linkage cavity, and the flywheel also has multiple shear holes located around the linkage cavity; the shear member is provided with fasteners, and the shear member is fixed in at least one of the shear holes by the fasteners; the shear member has an inner linkage cavity, and the inner wall of the inner linkage cavity is constructed as an inner linkage key; the end of the gearbox shaft facing the shear member is also provided with a spline assembly, the spline assembly including external splines and internal splines, the spline assembly is detachably connected to the internal linkage key through the external splines, and the spline assembly is detachably connected to the gearbox shaft through the internal splines.

[0007] In one embodiment, a protruding ring is provided on the side wall of the linkage cavity, and the protruding ring divides the linkage cavity into a first mounting cavity and a second mounting cavity; a first bearing is installed in the first mounting cavity, and a second bearing is installed in the second mounting cavity.

[0008] In one embodiment, the flywheel mechanism further includes a first stop cover mounted on the outer wall of the flywheel on the side away from the shear member and used to limit the second bearing.

[0009] In one embodiment, the gearbox shaft includes a first shaft portion and a second shaft portion, the diameter of the first shaft portion is smaller than the diameter of the second shaft portion, and a positioning boss perpendicular to the axial direction of the gearbox shaft is provided at the connection between the first shaft portion and the second shaft portion, and the gearbox shaft is fixed to the outer wall of the first cover by the positioning boss.

[0010] In one embodiment, an external linkage key is provided on the circumferential outer wall of the second shaft portion away from the first shaft portion, and the gearbox shaft is detachably connected to the internal spline on the spline assembly via the external linkage key.

[0011] In one embodiment, a positioning plate is provided on the outer wall of the shear member, and a first mounting hole is provided on the positioning plate. The fastener is installed in the first mounting hole; a removable protective sleeve is also provided in the shear hole.

[0012] In one embodiment, the positioning plate is further provided with a second mounting hole, in which a secondary bolt is installed. A carrier is also installed between the nut of the secondary bolt and the positioning plate. The carrier includes a fixing hole and an arc-shaped arm. The arc-shaped arm is located between the nut of the fastener and the positioning plate, and the fastener is located inside the arc-shaped arm.

[0013] In one embodiment, the flywheel mechanism further includes a second cover, and a limiting groove is formed on the outer wall of the shear member on the side away from the flywheel. The second cover is installed in the limiting groove and is used to axially limit the shear member and the spline assembly.

[0014] In one embodiment, the flywheel mechanism further includes a shaft cover, the second cover having a through-hole positioning cavity in the center, the shaft cover being installed in the positioning cavity and used to axially limit the spline assembly and the gearbox shaft.

[0015] In one embodiment, the shaft cover is equipped with a plurality of fixing bolts, and the gearbox shaft has a plurality of positioning screw holes on the outer wall of the side facing the shaft cover. The shaft cover is installed on the outer wall of the gearbox shaft by the plurality of fixing bolts.

[0016] This application has the following beneficial effects:

[0017] The flywheel fixing mechanism of the baler is a core component ensuring the stability of equipment transmission and operational safety. Its structural design achieves efficient power transmission while preventing overload damage through a unique safety mechanism. Once disengaged, the shearing component no longer rotates with the flywheel. The spline assembly engages with the gearbox shaft via internal splines and is axially fixed by the shaft cover. Even if the shearing component shifts, the flywheel remains firmly fixed to the gearbox shaft by the spline assembly, preventing it from falling off. The two functions of fixing the flywheel and shearing the fasteners are achieved by two separate structures. Simultaneously, a load-bearing component prevents the fasteners from flying out after breakage, ensuring the safety of the equipment and personnel. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application.

[0019] Figure 2 This is a three-dimensional structural diagram of an embodiment of this application.

[0020] Figure 3 This is a three-dimensional structural diagram of the shear member in one embodiment of this application.

[0021] Figure 4 This is a perspective view of the first cover in one embodiment of this application.

[0022] Figure 5 This is a perspective view of the shaft cover in one embodiment of this application.

[0023] Figure 6 This is a three-dimensional structural diagram of the carrier in one embodiment of this application.

[0024] Figure 7 This is a three-dimensional structural diagram of the flywheel in one embodiment of this application.

[0025] Figure 8 This is a cross-sectional view of an embodiment of this application.

[0026] Figure 9 An explosion of the overall structure of an embodiment of this application Figure 1 .

[0027] Figure 10 An explosion of the overall structure of an embodiment of this application Figure 2 .

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Gearbox shaft; 101. First shaft portion; 102. Second shaft portion; 103. Positioning boss; 104. External linkage key; 105. Positioning screw hole;

[0030] 2. Flywheel; 201. Linkage cavity; 202. Convex ring; 203. First mounting cavity; 204. Second mounting cavity; 205. Shear hole; 206. Protective sleeve;

[0031] 3. Fasteners;

[0032] 4. Shear force component; 401. Internal linkage key; 402. Limiting groove; 403. Positioning plate; 404. First mounting hole; 405. Second mounting hole; 406. Secondary bolt; 407. Bearing component; 4071. Fixing hole; 4072. Arc arm;

[0033] 5. Spline kit; 501. External spline; 502. Internal spline;

[0034] 6. Second cover; 601. Positioning cavity;

[0035] 7. Shaft cover; 8. Fixing bolt; 9. First bearing; 10. Second bearing; 11. First cover. Detailed Implementation

[0036] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0037] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0038] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this application, unless otherwise expressly 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 expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0040] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via 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. Similarly, "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.

[0041] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0042] See Figure 1 -Appendix Figure 10 , Figure 1 The diagram shows an overall structural schematic of a flywheel mechanism according to an embodiment of this application, used in a bundling device. It includes a flywheel 2 for connection to a drive device within the bundling device, the drive device driving the flywheel 2 to rotate; a gearbox shaft 1 connected to the flywheel 2 and used to drive the gearbox shaft 1 to rotate; and a shear member 4 connecting the gearbox shaft 1 and the flywheel 2. The flywheel 2 drives the gearbox shaft 1 to rotate via the shear member 4.

[0043] The flywheel 2 has a through linkage cavity 201, and the flywheel 2 also has multiple shear holes 205 located around the linkage cavity 201; the shear member 4 is provided with a fastener 3, and the shear member 4 is fixed in at least one shear hole 205 by the fastener 3; the shear member 4 has an inner linkage cavity, and the inner wall of the inner linkage cavity is constructed as an inner linkage key 401; the end of the gearbox shaft 1 facing the shear member 4 is also provided with a spline kit 5, the spline kit 5 includes an outer spline 501 and an inner spline 502, the spline kit 5 is detachably connected to the inner linkage key 401 through the outer spline 501, and the spline kit 5 is detachably connected to the gearbox shaft 1 through the inner spline 502.

[0044] During operation, the power source in the baling device drives the flywheel 2 to rotate. The flywheel 2 is linked with the gearbox shaft 1 through the spline assembly 5 and the shear member 4. Ultimately, the gearbox shaft 1 transmits power into the gearbox to complete the power supply for the baling operation. When the baling operation is overloaded, if the torque of the transmission system exceeds the shear strength threshold of the fastener 3, the fastener 3 will shear and break. After detachment, the shear member 4 no longer rotates with the flywheel 2, avoiding impact damage caused by component jamming or collision. The spline assembly 5 engages with the gearbox shaft 1 through the internal spline 502 and is axially fixed by the shaft cover 7. Even if the shear member 4 shifts, the flywheel 2 remains firmly fixed to the gearbox shaft 1 by the spline assembly 5, fundamentally eliminating the safety hazard of the flywheel 2 falling off.

[0045] See Figure 7 -Appendix Figure 9 A protruding ring 202 is provided on the side wall of the linkage cavity 201, which divides the linkage cavity 201 into a first mounting cavity 203 and a second mounting cavity 204. A first bearing 9 is installed in the first mounting cavity 203, and a second bearing 10 is installed in the second mounting cavity 204.

[0046] In some embodiments, the convex ring 202 plays a key "intermediate limiting" role in this structure. The inner end faces of the first bearing 9 and the second bearing 10 can fit against the side of the convex ring 202 to ensure that the spacing between the two bearings is fixed and to prevent misalignment due to axial force during operation.

[0047] In some embodiments, during baler operation, the rotation of the gearbox shaft 1 and flywheel 2 generates a large radial force. The dual-bearing design evenly distributes this radial force onto the cavity wall of the linkage chamber 201, preventing premature wear or damage to a single bearing due to excessive load. The coaxiality of the dual bearings is ensured by the machining precision of the linkage chamber 201, effectively limiting the radial runout of the gearbox shaft 1 and flywheel 2, ensuring smooth rotation of components during power transmission, reducing vibration and noise caused by eccentricity, and thus reducing the impact of the flywheel 2 on fasteners.

[0048] In some embodiments, the bearing is installed separately in the chamber as a wear part for easy maintenance and replacement. At the same time, the closed structure of the linkage chamber 201 can prevent straw fragments, dust and other impurities from entering the bearing and extend the bearing's service life.

[0049] See appendix Figure 7 -Appendix Figure 9 The flywheel mechanism also includes a first cover 11, which is installed on the outer wall of the flywheel 2 on the side away from the shear member 4 and is used to limit the second bearing 10.

[0050] In some embodiments, to facilitate quick replacement and disassembly of the second bearing 10, a removable first cover 11 is designed to axially limit the second bearing 10. The first cover 11 is fixed to the flywheel 2 by, but not limited to, bolts or similar structures.

[0051] See Figure 7 -Appendix Figure 9 The gearbox shaft 1 includes a first shaft portion 101 and a second shaft portion 102. The diameter of the first shaft portion 101 is smaller than the diameter of the second shaft portion 102. A positioning boss 103 perpendicular to the axial direction of the gearbox shaft 1 is provided at the connection between the first shaft portion 101 and the second shaft portion 102. The gearbox shaft 1 is fixed to the outer wall of the first cover 11 by the positioning boss 103.

[0052] In some embodiments, the mating surface between the positioning boss 103 and the outer wall of the first cover 11 can be directly used as an axial positioning reference to avoid "axial movement" during the assembly of the gearbox shaft 1 and ensure the installation position accuracy of subsequent components such as the flywheel 2 and spline kit 5.

[0053] In some embodiments, the annular structure of the positioning boss 103 can uniformly transmit the radial force generated by the rotation of the shaft to the first cover 11, avoiding wear or breakage caused by localized force concentration on the first cover 11. This design eliminates the need for additional independent positioning brackets or shims, as fixation can be achieved through the positioning boss 103 of the gearbox shaft 1 itself, reducing the number of assembly parts and improving assembly efficiency.

[0054] In some embodiments, during installation, the first shaft portion 101 of the gearbox shaft 1 is first installed toward the linkage cavity 201 on the flywheel 2, and then the shaft is pushed so that the first shaft portion 101 passes through the linkage cavity 201 until the end face of the positioning boss 103 is completely in contact with the outer wall of the first cover 11.

[0055] See appendix Figure 8 -Appendix Figure 10 An external linkage key 104 is provided on the circumferential outer wall of the second shaft portion 102 away from the first shaft portion 101. The gearbox shaft 1 is detachably connected to the inner spline 502 on the spline assembly 5 through the external linkage key 104.

[0056] In some embodiments, the output power of the power device inside the baler is first transmitted to the flywheel 2, causing the flywheel 2 to rotate. The power device is connected to the flywheel 2 and transmits power through, but not limited to, a belt.

[0057] In some embodiments, the flywheel 2 transmits rotational power to the shear member 4 via the fastener 3. The shear member 4 engages with the outer spline 501 of the spline assembly 5, further transmitting power to the spline assembly 5. The inner spline 502 of the spline assembly 5 engages with the outer linkage key 104 on the gearbox shaft 1, ultimately transmitting power to the gearbox to complete the subsequent bundling operation.

[0058] See appendix Figure 2 -Appendix Figure 3 A positioning plate 403 is provided on the outer wall of the shear member 4, and a first mounting hole 404 is provided on the positioning plate 403. The fastener 3 is installed in the first mounting hole 404; a removable protective sleeve 206 is also provided in the shear hole 205.

[0059] In some embodiments, in the prior art, since the baler gearbox shaft 1 itself is installed at a "downward tilt" angle, after the fastener 3 is overloaded and sheared, the shear member 4 will move downward along the outer spline 501 of the spline kit 5 under the action of gravity, and completely detach from the rotating flywheel 2.

[0060] In this application, the shear member 4, after being detached, no longer rotates with the flywheel 2, thus avoiding impact damage caused by component jamming or collision. The spline kit 5 engages with the gearbox shaft 1 through the inner spline 502 and is axially fixed by the shaft cover 7. Even if the shear member 4 is displaced, the flywheel 2 is still firmly fixed to the gearbox shaft 1 by the spline kit 5, fundamentally eliminating the safety hazard of the flywheel 2 falling off.

[0061] In some embodiments, when the fastener 3 breaks, the protective sleeve 206 will be damaged. To facilitate the replacement of the protective sleeve 206 and re-secure the connection with a new fastener 3, a removable protective sleeve 206 is designed. When one or more of the shear holes 205 are damaged, the design of multiple shear holes 205 allows for the replacement of the shear holes 205 on which the fastener 3 is installed, thereby reducing the risk of damage and increasing service life.

[0062] See appendix Figure 1 Appendix Figure 3 and attached Figure 6The positioning plate 403 is also provided with a second mounting hole 405. A secondary bolt 406 is installed in the second mounting hole 405. A bearing member 407 is also installed between the nut of the secondary bolt 406 and the positioning plate 403. The bearing member 407 includes a fixing hole 4071 and an arc-shaped arm 4072. The arc-shaped arm 4072 is located between the nut of the fastener 3 and the positioning plate 403, and the fastener 3 is located inside the arc-shaped arm 4072.

[0063] In some embodiments, the core safety design of this application lies in the closed-loop protection mechanism of "overload breakage fastener 3 - shear member 4 displacement - flywheel 2 anti-fall-off".

[0064] In some embodiments, when an overload occurs during the baling operation (such as straw blockage, sudden load change, etc.), and the torque borne by the transmission system exceeds the safety threshold, the fastener 3 will preferentially shear off, thereby severing the connection between the flywheel 2 and the shear member 4. To prevent the broken fastener 3 from flying out and causing damage to internal equipment and parts, a load-bearing structure 407 is designed. When the flywheel 2 drives the gearbox shaft 1 to rotate clockwise, the arc-shaped arm 4072 will buffer the broken fastener 3, preventing the fastener 3 from directly detaching and flying out of the shear member 4.

[0065] See appendix Figure 4 and attached Figure 8 -Appendix Figure 10 The flywheel mechanism also includes a second cover 6. A limiting groove 402 is provided on the outer wall of the shear member 4 away from the flywheel 2. The second cover 6 is installed in the limiting groove 402 and is used to axially limit the shear member 4 and the spline assembly 5.

[0066] In some embodiments, the second cover 6 axially limits the shear member 4 and the spline assembly 5 to prevent them from moving axially. The outer diameter of the second cover 6 is the same as the inner diameter of the limiting groove 402, the inner diameter of the positioning cavity 601 is smaller than the outer diameter of the spline assembly 5 and larger than the diameter of the second shaft portion 102. Therefore, when the second cover 6 is installed in the limiting groove 402 through the shaft cover 7, the second cover 6 can limit the shear member 4 and the spline assembly 5 and prevent them from moving axially relative to the second shaft portion 102.

[0067] See appendix Figure 8 -Appendix Figure 10 The flywheel mechanism also includes a shaft cover 7. The second cover 6 has a through positioning cavity 601 in the middle. The shaft cover 7 is installed in the positioning cavity 601 and is used to axially limit the spline kit 5 and the gearbox shaft 1.

[0068] In some embodiments, during operation, a shaft cover 7, a second cover 6, and a spline assembly 5 are sequentially fitted and installed axially from the outside to the inside. One side of the gearbox shaft 1 is fixed to one side of the outer wall of the flywheel 2 by a positioning boss 103, and the other side of the gearbox shaft 1 is fixed to the other side of the outer wall of the flywheel 2 by the shaft cover 7, thereby achieving axial limitation and preventing the flywheel 2 or other components from flying out.

[0069] See appendix Figure 8 - Appendix Figure 10 The shaft cover 7 is equipped with multiple fixing bolts 8, and the outer wall of the gearbox shaft 1 facing the shaft cover 7 has multiple positioning screw holes 105. The shaft cover 7 is installed on the outer wall of the gearbox shaft 1 by multiple fixing bolts 8.

[0070] In some embodiments, the shaft cover 7 axially limits the spline assembly 5 and the gearbox shaft 1 to prevent the spline assembly 5 from moving axially. The outer diameter of the shaft cover 7 is the same as the inner diameter of the second cover 6, and the outer diameter of the shaft cover 7 is larger than the diameter of the second shaft portion 102. Therefore, when the shaft cover 7 is installed on the outer wall of the gearbox shaft 1 by a plurality of fixing bolts 8, the shaft cover 7 can limit the spline assembly 5 and prevent it from moving axially relative to the second shaft portion 102.

[0071] In some embodiments, the fixing bolt 8 is fixed in the positioning screw hole 105 by, but not limited to, threaded connection.

[0072] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0073] The above embodiments merely illustrate several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

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