Torque limiter with flange yoke

Abstract

The invention is a torque limiter disclosed in the patent number TR 2023 / 016783 and comprises a flange yoke mounted on the pressure flange for connection to the driveshaft.

Description

[0001] TORQUE LIMITER WITH FLANGE YOKE

[0002] Technical Field

[0003] The invention relates to a torque limiter containing a flange yoke, developed to enable connection to the driveshaft.

[0004] The present invention discloses flange yoke mounted on the pressure flange side for connecting said torque limiter to the driveshaft.

[0005] State of the Art

[0006] Nowadays, there is a need for systems that will prevent driveshaft failures that occur with sudden torque increase (peak torque). In particular, there is a need for a torque limiter positioned at the driveshaft motor / reducer / transmission output to prevent malfunctions caused by sudden peak torque in electrically driven systems.

[0007] Torque limiters in current applications protect against damage caused by shock loads in the driveshafts of agricultural vehicles. Generally, friction disc, shear bolt, radial pin and cam clutch types are used in these vehicles. In shear bolt torque limiters, torque transmission is prevented by cutting the bolt, but the system cannot be put into operation in a short time without replacing the shear bolt without human intervention. Having more than one pad in a torque limiter with brake pads makes the maintenance of the torque limiter difficult and also increases its costs. However, said torque limiter systems include products developed specifically for the driveshafts of agricultural vehicles. In the industrial market, there is a need for a torque limiter that will protect against sudden load changes, for example, sudden peak torque occurrences due to operation in rolling mills, sudden shock damage to the system caused by electrical voltage fluctuations or interruptions. In addition, in the literature research, it is determined that the torque limiter in the industrial market and agricultural vehicles is limited and protected by patents. As a matter of fact, it has been observed that companies that make torque limiter applications have developed them specifically for industrial applications and agricultural vehicles. In the patent research of the state of the art, US10436261 has been found regarding the subject. Said document is about the roller type torque limiter. The roller type torque limiter moves axially moving balls between the peripheral teeth and the inner surface of the connection flange. During overload, the balls change place in the housing and prevent the rotation movement from being transmitted instantly until normal load occurs. However, the spherical bearing roller slots lined up on the pressure flange surface and the internal form of the bearing cover in contact with the rollers apply perpendicular force to the rollers. Additionally, in mentioned document the torque limiter is used only in industrial applications.

[0008] In the document numbered CN113803361 , which is in the state of the art, a mechanical system with a channel in the slide group in the driveshafts and balls in the channel is mentioned. An approach has been described in which the torsional force is reduced on the balls, thus protecting the driveshaft. However, apart from the elements of the driveshaft (for example, the sliding group), there is no mention of a mechanical system that can be integrated into the driveshaft and that limits over torque in case of sudden torque increase.

[0009] In the document numbered WO2018111957, which is in the state of the art, different combinations of an electro-mechanical system that absorbs the excessive torque in the sudden torque output of a gearbox containing an electronic control unit (ECU) and does not transfer it to the driveshaft are mentioned. However, there is no mechanical system integrated in the driveshaft to limit excessive torque in the event of a sudden increase in torque.

[0010] As a result of the aforementioned issues and the limited supply of available solutions, it became necessary to carry out an improvement in the relevant technical field.

[0011] Object of the Invention

[0012] The present invention relates to a torque limiter which eliminates the abovementioned disadvantages and brings new advantages to the relevant technical field.

[0013] The object of the invention is to connect the torque limiter to the driveshaft via a flange yoke. Another project of the invention is to introduce a yoke part structure adapted according to the structure of the torque limiter and coupled to the driveshaft joint in order to transfer mechanical power to the driveshaft via the torque limiter. in order to fulfil all the purposes mentioned above and which may arise from the detailed description, the invention is a torque limiter comprises: a pressure flange, a hub shaft, bearing that guides the mentioned hub shaft, to ensure that the torque limiter (A) is connected to the driveshaft and comprising: connection holes formed on the pressure flange, a flange yoke connecting said pressure flange to the driveshaft joint, connection slots corresponding to said connection holes and formed on said flange yoke, connection element that connects said flange yoke to the pressure flange by positioning it in said connection holes and said connection slots, a bearing housing formed on said flange yoke, in which said bearing is positioned.

[0014] In a preferred embodiment of the invention, an object of the invention is to have at least 2 said contact elements and at least 2 said contact slots.

[0015] In a preferred embodiment of the invention, an object of the invention is that the said connecting element is a bolt.

[0016] In a preferred embodiment of the invention, an object of the invention is to provide said flange yoke with an inner surface and support wall on which the bearing is placed within the said bearing housing.

[0017] In a preferred embodiment of the invention, an object of the invention is to include a planar surface in which said flange yoke directly contacts the lower surface of the pressure flange.

[0018] The structural and characteristic features of the present invention will be understood clearly by the following figures and the detailed description made with reference to these drawings. Therefore, the evaluation shall be made by taking these figures and the detailed description into consideration.

[0019] Figures Clarifying the Invention

[0020] Figure 1: Cross-sectional view of the torque limiter that is the subject of the invention.

[0021] Figure 2: Cross-sectional view of the torque limiter that is the subject of the invention when it is in the engaged.

[0022] Figure 3: Cross-sectional view of the torque limiter that is the subject of the invention when it is in the disengaged.

[0023] Figure 4: Front view of the pressure flange of the torque limiter that is the subject of the invention.

[0024] Figure 5: Sectional view of the pressure flange of the torque limiter that is the subject of the invention.

[0025] Figure 6: Detail view of the pressure flange of the torque limiter that is the subject of the invention.

[0026] Figure 7: View of the hub shaft of the torque limiter that is the subject of the invention.

[0027] Figure 8: Sectional view of the hub shaft of the torque limiter that is the subject of the invention.

[0028] Figure 9: Front view of the bearing cover of the torque limiter that is the subject of the invention.

[0029] Figure 10: Sectional view of the bearing cover of the torque limiter that is the subject of the invention.

[0030] Figure 11: Rear view of the pressure flange of the torque limiter that is the subject of the invention.

[0031] Figure 12. Front view of the pressure flange containing the bolt holes of the torque limiter that is the subject of the invention.

[0032] Figure 13. Rear perspective view of the flange yoke of the torque limiter that is the subject of the invention.

[0033] Figure 14. Front perspective view of the flange yoke of the torque limiter that is the subject of the invention.

[0034] Figure 15. Front perspective view of the torque limiter that is the subject of the invention, where the flange yoke and the pressure flange are together.

[0035] Figure 16: Rear perspective view of the torque limiter that is the subject of the invention, where the flange yoke and the pressure flange are together. Figure 17: Sectional view of the torque limiter that is the subject of the invention, where the flange yoke and the pressure flange are together.

[0036] Figure 18: Sectional view of the torque limiter with flange yoke that is the subject of the invention.

[0037] Description of the Part References

[0038] A. Torque limiter

[0039] 10. Pressure flange

[0040] 11. Ball slot

[0041] 12. Connection hole

[0042] 20. Ball

[0043] 30. Gasket

[0044] 40. Bearing cover

[0045] 41. Ball bearing

[0046] 50. Belleville

[0047] 60. Locking washer

[0048] 70. Hub shaft

[0049] 71. Groove

[0050] 80. Flange yoke

[0051] 81. Connection slot

[0052] 82. Connection element

[0053] 83. Bearing housing

[0054] 84. I nner surface and support wall

[0055] 85. Planar surface

[0056] 90. Bearing

[0057] X. X axis p. P angle a. a angle

[0058] Detailed Description of the Invention

[0059] In this detailed description, the preferred embodiments of the torque limiter (A) are described only for clarifying the subject matter in a manner such that no limiting effect is created. The invention is about the torque limiter (A) connected to the driveshaft via a flange yoke (80).

[0060] The torque limiter (A) subject to the invention is positioned at the motor / gearbox / reducer (power unit) connection end of the driveshaft. The torque limiter (A) limits the sudden peak torque that produced by the power unit (initial startup or sudden shock from various causes) and prevents malfunctions and damage to the driveshaft or other driveline components. In addition, it also prevents damage that may occur in the power unit due to reaction torques reaching the power unit from the powertrain.

[0061] The torque limiter (A) shown in Figure 1 basically comprises a pressure flange (10) with conically shaped ball slots (11 ) to accommodate the balls (20), a hub shaft (70) having a groove (71 ) structure which is connected to the pressure flange (10) and which can be loaded with at least two rows of balls (20) coaxially, and a bearing cover (40) connected to the hub shaft (70) and coaxially surrounding the balls (20) and pressed by bellevilles (50) in the direction of the X axis (X). The locking washer (60), which surrounds the hub shaft (70) on its axis, is the element that prevents and fixes the bellevilles (50) from moving back and forth axially in the X axis (X) by applying pressure on the bearing cover (40).

[0062] The pressure flange (10) is the component having the ball slots (11 ) which to provide bearing the balls (20) and thus position the balls (20), so that the balls (20) are radially displaced out of the ball slots (11) in the event of a sudden peak torque. At the same time, the pressure flange (10) serves to transmit the torque transferred by the balls (20) or to prevent over torque from being transmitted. The balls (20) move in the grooves (71) on the hub shaft (70) in case of over torque, and they come out of the ball slots (11) on the pressure flange (10) and interrupt the torque transmission.

[0063] The bellevilles (50) are positioned coaxially to the bearing cover (40) and transfer their force to the balls (20) through the bearing cover (40) by determining their number, dimensions and arrangement (series, parallel or series+parallel) according to the coupling torque. The targeted torque value depends on the belleville (50), and the dimensions and number of the belleville (50) are determined according to the target torque. Bellevilles (50) are mounted in the bearing cover (40) on the hub shaft (70), and by providing pre-load according to the engagement torque to keep the bearing cover (40) under pressure. The system remains engaged thanks to the bearing cover (40) and the balls (20) under pressure.

[0064] The gasket (30) positioned externally between the pressure flange (10) and the bearing cover (40) prevents external contaminants such as dust, mud, and water from entering the torque limiter (A) via the hub shaft (70).

[0065] Figure 1 and Figure 2 show the torque limiter (A) is in the engaged position. Figure 2 shows that the ball (20) sits in the ball slot (11) on the pressure flange while the torque limiter (A) is in the engaged position. During engagement, the torque from the power unit is transmitted from the torque limiter (A) to the hub shaft (70) via the torque transmission pressure flange (10) and the ball (20) which fits into the ball slot (11 ). Torque is transferred to the driveshaft or other transmission units via the hub shaft (70). As long as the axial reaction force created by the radial force caused by the torque applied through the balls (20) in the ball slot (11) and the axial force applied to the balls (20) on the bearing cover (40) by the belleville (50) are in balance, the torque limiter (A) remains in the engaged and continues to transmit torque.

[0066] If the torque limiter (A) is deactivated under normal operating conditions with no sudden peak torque, the balls (20) on the pressure flange (10) side automatically reinsert into their ball slots (11) and torque transmission continues.

[0067] Figure 3 shows the situation where the torque is not transmitted, the clutch (torque limiter) is disabled, and the torque limiter (A) is in the disengaged. Thus, in Figure 3, it can be seen that the ball (20) comes out of the slot (11 ) on the pressure flange (10). If the axial force generated by the torque passing through the balls (20) in the ball slot (11 ) is greater than the axial force exerted by the belleville (50) on the balls (20) on the bearing cover (40), the torque limiter (A) disengages from the engaged position and does not transmit torque. That is, Figure 3 shows the condition where sudden peak torques occur and the torque limiter (A) is in the disengaged.

[0068] Figure 4 shows the view of the pressure flange (10). The pressure flange (10) contains ball slots (11) on one surface. For the torque limiter (A) to function properly, the ball slots (11 ) are arranged radially on the surface of the pressure flange (10) with an angle P (p) of 15° (degree) between them. The flat surfaces b etween the slots (11) are the surfaces on which the balls (20) roll when the torque limiter (A) is in the disengaged. The condition in which the torque limiter (A) functions is when the sudden peak torque is not transmitted, i.e. the torque limiter is disengaged, and the torque is not transmitted when the balls (20) come out of their slots (11) and the pressure flange (10) and the hub shaft (70) rotate on the balls (20).

[0069] Figure 5 shows the cross-section of the pressure flange (10), and Figure 6 shows the detail view of the ball slot (11 ) located in the pressure flange (10). The ball slots (11 ) arranged radially on the surface of the pressure flange (10) have a conical shaped geometry with an angle of a (a between 50°and 80° (degree). In the case where th e driveshafts rotate at high speeds (average 2000 rpm and above) and the torque limiter is disengaged, the effect of the impacts that the balls (20) will cause on the slots (11 ) when the balls (20) come out of the slots (11) and move on the pressure flange (10) and hit the slots (11 ) when re-engaged is reduced by the ball slots (11) with a conical shaped structure, thus increasing the torque stability of the torque limiter (A) at high speed.

[0070] Figure 7 and Figure 8 show the cross-sectional view of the hub shaft (70). The hub shaft (70) transfers the torque it receives from the power unit to the driveshaft by carrying it to the pressure flange (10) via the balls (20). Accordingly, there are preferably twenty-four grooves (71) on the surface of the hub shaft (70), arranged radially at an equal angle with 0 angle (0) of 15° (degree) and opened to be equal to the diameter of the ball (20). Each of the grooves (71 ) is arranged in a way that can position two balls (20) in mutual contact in the X axis (X) direction (axial direction).

[0071] Figures 9 and 10 show the front and cross-sectional views of the bearing cover (40). The pressure force of the belleville (50) is transmitted through the point contact of the balls (20) sitting in the ball bearings (41) on the bearing cover (40) with the other balls (20) in the axial direction in the groove (71 ), and the system remains in the engaged.

[0072] In the torque limiter (A), torque transmission is transferred to the hub shaft (70) via the pressure flange (10) and the ball (20) sitting on the ball slot (11). With the point contact of two axially opposed balls (20) located in the groove (71), the friction surface between the balls (20) during torque transfer is reduced, wear is reduced, and the life and efficiency of the torque limiter increases. In Figure 11 and Figure 12, the rear and front perspective views of the pressure flange (10) are given. The pressure flange (10) has ball slots (11) on its front surface and contains connection holes (12) on its rear surface, allowing it to be mounted with the flange yoke (80).

[0073] In Figure 13 and Figure 14, the rear and front perspective views of the flange yoke (80) are given. There are connection slots (81 ) corresponding to the connection holes (12) on the rear surface of the flange yoke (80), which is mounted with the pressure flange (10), and the bearing housing (83) and inner surface and support wall (84) form are located on the inside of the rear surface. The bearing (90), which supports the hub shaft (70), is placed in the bearing housing (83), driven down to the inner surface and support wall (84), and the assembly is completed.

[0074] In Figure 15 and Figure 16, rear and the front perspective views of the integrated structure assembled with the connection elements (82) of the flange yoke (80) and the pressure flange (10) are given, and in Figure 17, the sectional view is given. After assembly of the bearing (90) to the flange yoke (80), the connection slots (81) of the flange yoke (80) and the connection holes (12) of the pressure flange (10) contact on the planar surface (85) and are preferably combined with 4 connection elements (82) (preferably bolts) and an integrated structure is formed. With the mentioned flange yoke (80) embodiment, the torque limiter (A) can be coupled to the driveshaft joint.

Claims

CLAIMS1. A torque limiter (A) comprising: a pressure flange (10) a hub shaft (70), bearing (90) that guides the mentioned hub shaft (70) to ensure that the torque limiter (A) is connected to the driveshaft: characterized by comprising: connection holes (12) formed on the pressure flange (10), a flange yoke (80) connecting said pressure flange (10) to the driveshaft joint, connection slots (81) corresponding to said connection holes (12) and formed on said flange yoke (80), connection element (82) that connects said flange yoke (80) to the pressure flange (10) by positioning it in said connection holes (12) and said connection slots (81 ), a bearing housing (83) formed on said flange yoke (80), in which said bearing (90) is positioned.

2. The torque limiter (A) according to claim 1 , characterized by comprising: at least 2 said connection elements (82), at least 2 said connection slots (81).

3. The torque limiter (A) according to claim 1 , characterized in that; said connection element (82) is bolt.

4. The torque limiter (A) according to claim 1 , characterized in that; said flange yoke (80) comprises an inner surface and a support wall (84) on which the bearing (90) is placed on said bearing housing (83).

5. The torque limiter (A) according to claim 1 , characterized in that; said flange yoke (80) comprises a planar surface (85) in direct contact with the lower surface of the pressure flange (10).

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