An axially controlled multi-mode clutch

Abstract

The application discloses an axial control multi-mode clutch and belongs to the technical field of clutches. The axial control multi-mode clutch comprises an outer ring, a plurality of cavities are arranged on the inner circumferential surface of the outer ring and are spaced apart along the circumferential direction of the outer ring; a deflection ring is provided with a plurality of pockets which are spaced apart along the circumferential direction of the deflection ring and penetrate the deflection ring, a roller is arranged in each pocket, the roller is in one-to-one correspondence with the cavity and is matched with the cavity, the deflection ring is arranged between the inner circumferential surface of the outer ring and the outer circumferential surface of an inner shaft, and an inclined inclined column is protruded from one side of the deflection ring. The axial control multi-mode clutch avoids the problems that the overall size of the existing structure is large, the space occupied is large, the compactness and lightweight design of the transmission system are not favorable, and the deflection ring is often dependent on a single stress point or a single side driving mechanism to realize the engagement or separation of the clutch, so that the situation of being stuck occurs.

Description

Technical Field

[0001] This invention relates to the field of clutch technology, specifically to a multi-mode clutch with axial control. Background Technology

[0002] Multi-mode clutches, as key transmission components capable of switching between multiple power transmission modes, are widely used in engineering machinery, new energy vehicles, intelligent agricultural machinery, and special vehicles. Their core function is to flexibly switch power transmission paths and methods according to operating conditions, thereby improving system efficiency and handling performance.

[0003] However, the existing multi-mode clutch CN107542808B includes a clutch body and an actuator. The clutch body includes an outer ring and an inner ring arranged coaxially. A control ring is provided between the outer ring and the inner ring. Several windows are penetrating the outer circumferential surface of the control ring along its circumferential direction. Each window contains a roller. The inner wall of the outer ring has several cavities corresponding to the rollers. The distance from the middle part of the cavity bottom to the outer wall of the inner ring is greater than the diameter of the roller. The left side of the cavity gradually slopes towards the inner ring from the bottom to the left side, and the right side of the cavity gradually slopes towards the inner ring from the bottom to the right side. The multi-mode clutch of the present invention causes the rollers on it to be in three different working positions in the cavity as the control ring rotates, thereby realizing three working modes of the clutch. The actuator uses a lever to drive the control ring to rotate, thereby realizing the free switching of the three working modes of the clutch. In structural design, an external lever is usually used to switch the control loop, which occupies most of the radial space, resulting in a large overall size and a lot of space occupied. This is not conducive to the compact and lightweight design of the transmission system, especially in applications where radial space is limited.

[0004] Secondly, during mode switching, especially when switching from bidirectional transmission to unidirectional overrunning mode, or resetting from the working state to neutral, existing structures often rely on a single force point or a single-sided drive mechanism to engage or disengage the clutch. Under long-term operation or poor lubrication conditions, this design is prone to uneven force, manufacturing errors, or foreign object intrusion, leading to movement stagnation or even complete jamming, severely impacting the clutch's reliability and lifespan. Furthermore, the single force point structure also has limitations in dynamic response speed and switching smoothness, making it difficult to meet the demands of high-frequency, high-precision operating condition switching.

[0005] Therefore, it is necessary to provide a multi-mode clutch with axial control to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned problems in the prior art, the purpose of the present invention is to provide an axially controlled multi-mode clutch to solve the problems mentioned in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an axially controlled multi-mode clutch, including an outer ring, and a plurality of cavities spaced apart on the inner circumferential surface along its circumferential direction; The deflection ring has multiple pockets spaced apart along its circumference, and each pocket contains a roller. The rollers correspond to and cooperate with the cavities. The deflection ring is positioned between the inner circumferential surface of the outer ring and the outer circumferential surface of the inner shaft, and an inclined column protrudes from one side of the deflection ring. A spring coil is fixedly connected to an outer ring, and the inner peripheral wall of the spring coil extends inward to have an elastic portion. The device includes a direct-acting ring with a reset groove and a transmission groove. The direct-acting ring is slidably connected to the outer ring along its axial direction. The elastic part is inserted into the reset groove. The inclined column is inserted into the transmission groove, allowing the deflection ring to rotate as the direct-acting ring moves axially. When the direct-acting ring moves towards the outer ring, the elastic deformation of the elastic part gradually increases. When the direct-acting ring is in a free state, the elastic force of the elastic part is released, causing the direct-acting ring to reset. When the deflection ring rotates to different positions of the roller in the cavity, the clutch is in different working modes.

[0008] Furthermore, at least two inclined columns are provided and integrally formed with the deflection ring, and the inclined columns have inclined guide surfaces on both sides; The roller is confined within a pocket by an elastic element. The side of the pocket where the elastic element is installed is a first position, and the other side is a second position. The rotation direction of the outer ring from the first position to the second position is the first rotation direction. The guide surface gradually tilts towards the first rotation direction along the deflection ring to the spring ring direction.

[0009] Furthermore, the two sides of the transmission groove are inclined transmission surfaces, and the transmission surfaces are parallel to the guide surfaces.

[0010] Furthermore, the elastic part is integrally formed with the spring coil, and at least two elastic parts are provided along the radial direction of the spring coil, with the inner end of the elastic part being a free end; The inner end of the linearly driven coil has a curved protrusion, which corresponds one-to-one with the elastic part. The gap between the protrusion and the linearly driven coil forms the reset groove, and the free end is located in the reset groove.

[0011] Furthermore, the outer ring has an integrally formed coarse ring segment and a fine ring segment, the outer diameter of the coarse ring segment is larger than the outer diameter of the fine ring segment, and the cavity is located on the inner wall of the coarse ring segment; A transmission part is provided on the inner peripheral wall of the thin ring segment.

[0012] Furthermore, the inner peripheral wall of the direct-drive ring is provided with a plurality of limiting grooves, which are aligned with the transmission groove; The outer peripheral wall of the thin ring segment is equipped with linear keys that correspond one-to-one with the limiting grooves. The linear ring moves axially along the thin ring segment so that the limiting grooves slide along the linear keys.

[0013] Furthermore, the elastic portion gradually narrows from its root to its free end.

[0014] Furthermore, a boss is provided on one side of the pocket, and a gap is left between the two ends of the boss and the pocket. The elastic element is a spring sheet, which is arranged in a cross pattern. The root of the spring sheet has a flange, and the spring sheet is secured to the boss by the flange.

[0015] Furthermore, the outer end of the boss has a convex arc, which restricts the spring sheet from sliding radially out of the boss.

[0016] Furthermore, the spring coil, direct-acting coil, outer ring, and deflection ring are all concentrically arranged; The cavity has a concentric arc portion concentric with the outer ring and an eccentric arc portion eccentrically disposed with respect to the outer ring, the eccentric arc portion being located on one side of the concentric arc portion; The groove of the eccentric arc portion is deeper at one end and shallower at the other end, and the deeper end of the eccentric arc portion is connected to one end of the concentric arc portion. In the initial state, the roller is located inside the concentric arc section. In the unidirectional mode, the deflection ring rotates to keep the roller inside the concentric arc section.

[0017] The beneficial effects of this invention are as follows: This invention provides an axially controlled multi-mode clutch. This clutch, by setting an inclined column, allows the direct-acting ring to complete the unidirectional activation and engagement of the clutch when it moves axially. The overall structure is small and compact, saving radial space for installation. By setting a spring ring and installing it in the reset groove, the direct-acting ring resets under the release of spring force after the actuator unit is powered off. Multiple elastic parts make the direct-acting ring move more stably in the axial direction, allowing the direct-acting ring to be evenly stressed. This avoids the large overall size of existing structures, which occupy a lot of space and are not conducive to the compact and lightweight design of the transmission system. Furthermore, the deflection ring often relies on a single force point or a single-sided drive mechanism to achieve clutch engagement or disengagement, which can lead to jamming.

[0018] In addition to the objectives, features, and advantages described above, the present invention has other objectives, features, and advantages. The invention will now be described in further detail with reference to the figures. Attached Figure Description

[0019] The accompanying drawings, which form part of this specification, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is an overall schematic diagram of the present invention; Figure 2 This is an overall exploded view of the present invention; Figure 3 This is a schematic diagram of the spring coil and the direct-acting ring of the present invention; Figure 4 For the present invention Figure 3 Enlarged diagram of area A in the image; Figure 5 This is a schematic diagram of the inner side of the outer ring of the present invention; Figure 6 For the present invention Figure 5 Enlarged diagram of area B in the middle; Figure 7 This is a schematic diagram of the deflection ring of the present invention; Figure 8 For the present invention Figure 7 Enlarged diagram of area C; Figure 9 This is a schematic diagram of the clutch unlocked state according to the present invention; Figure 10 This is a schematic diagram of the roller position in the unlocked state according to the present invention; Figure 11 This is a schematic diagram of the clutch in one-way state according to the present invention; Figure 12 This is a schematic diagram of the unidirectional roller position according to the present invention; Figure 13 This is a schematic diagram of the electromagnet connection of the present invention; The following are the labeling elements in the figure: 1. Spring coil; 11. Elastic part; 2. Direct-acting ring; 201. Transmission groove; 2011. Transmission surface; 202. Limiting groove; 21. Protrusion; 211. Reset groove; 212. Supporting surface; 3. Outer ring; 301. Coarse ring segment; 3011. Deflection groove; 3012. Cavity; 3012a. Concentric arc portion; 2012b. Eccentric arc portion; 302. Fine ring segment; 3021. Direct-acting key; 3022. Spline hole; 4. Deflection ring; 401. Inclined post; 4011. Connecting surface; 4012. Guide surface; 402. Pocket; 41. Boss; 411. Outer convex arc; 42. Spring plate; 43. First position; 44. Second position; 45. Roller 5. Inner shaft; 6. Retaining ring; 7. Electromagnet. Detailed Implementation

[0020] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] like Figure 1-8 As shown, the present invention provides a technical solution: an axially controlled multi-mode clutch, comprising...

[0023] The outer ring 3 has multiple cavities 3012 spaced apart along its circumference on its inner circumferential surface, and a retaining ring 6 is fitted on one side of the outer ring 3. The deflection ring 4 has multiple pockets 402 spaced through it along its circumference. Each pocket 402 is provided with a roller 45. The roller 45 is restricted in the pocket 402 by an elastic element and corresponds to and cooperates with the cavity 3012. An inner shaft 5 is installed in the deflection ring 4. The deflection ring 4 is arranged between the inner circumferential surface of the outer ring 3 and the outer circumferential surface of the inner shaft 5. An inclined column 401 protrudes from one side of the deflection ring 4. Spring coil 1 is fixedly connected to outer ring 3, and at least two elastic portions 11 extend inward from the inner peripheral wall of spring coil 1. The direct-acting ring 2 has a reset groove 211 and a transmission groove 201. The direct-acting ring 2 is slidably connected to the outer ring 3 along the axial direction of the outer ring 3. The elastic part 11 is inserted into the reset groove 211. The inclined column 401 is inserted into the transmission groove 201, so that the deflection ring 4 can rotate with the axial movement of the direct-acting ring 2. When the direct-acting ring 2 moves towards the outer ring, the elastic deformation of the elastic part 11 gradually increases. When the direct-acting ring 2 is in a free state, the elastic force of the elastic part 11 is released, driving the direct-acting ring 2 to reset. When the deflection ring 4 rotates to different positions of the roller 45 in the cavity 3012, the clutch is in different working modes. The material of the deflection ring 4 includes, but is not limited to, nylon.

[0024] There are no fewer than two inclined columns 401 and they are integrally formed with the deflection ring 4. The inclined columns 401 have inclined guide surfaces 4012 on both sides. The side where the elastic element is installed in the pocket 402 is the first position 43, and the other side is the second position 44. The rotation direction of the outer ring 3 from the first position 43 to the second position 44 is the first rotation direction. The guide surface 4012 gradually tilts in the first rotation direction along the deflection ring 4 to the spring ring 1.

[0025] The two sides of the transmission groove 201 are inclined transmission surfaces 2011, which are parallel to the guide surface 4012.

[0026] The inclined column 401 also has a connecting surface 4011, and the guide surface 4012 is spaced apart from the connecting surface 4011. The connecting surface 4011 is coplanar with the inner surface and the outer surface of the deflection ring 4, respectively.

[0027] The elastic part 11 is integrally formed with the spring coil 1. At least two elastic parts 11 are provided along the radial direction of the spring coil 1, and the inner end of the elastic part 11 is a free end. The inner end of the linearly driven coil 2 has a curved protrusion 21, which corresponds one-to-one with the elastic part 11. The gap between the protrusion 21 and the linearly driven coil 2 forms the reset groove 211. The free end is located in the reset groove 211. The inner surface of the reset groove 211 facing the linearly driven coil 2 is an inclined abutment surface 212. The width of the reset groove 211 from the opening to the bottom gradually narrows. The inclined surface allows the distal end of the elastic part 11 to better contact the abutment surface 212, making the force point more stable. The elastic part 11 fully utilizes the radial space between the coarse ring segment 301 and the fine ring segment 302 for deformation, eliminating the need for axially installed springs and other components, thereby improving the overall compactness of the assembly.

[0028] The elastic portion 11 gradually narrows from its root to its free end. This allows for full utilization of the radial space of the spring coil 1 and increases its deformation strength.

[0029] The pocket 402 has a boss 41 on one side, and there is a gap between the two ends of the boss 41 and the pocket 402. The elastic element is a spring plate 42, which is arranged in a cross pattern. The root of the spring plate 42 has a flange, and the spring plate 42 is secured to the boss 41 by the flange. The spring plate 42 contacts the roller 45, so that the contact between the roller 45 and the outer ring 3 has a certain elasticity, so as to reduce the impact effect on the deflection ring 4 and the roller 45 when the actuator has no buffer and will cause impact on the roller 45 and the deflection ring 4.

[0030] The outer end of the boss 41 has an outwardly convex arc 411, which restricts the spring sheet 42 from sliding radially out of the boss 41.

[0031] The outer ring 3 has an integrally formed coarse ring segment 301 and a fine ring segment 302. The outer diameter of the coarse ring segment 301 is larger than the outer diameter of the fine ring segment 302. A deflection groove 3011 for the inclined column 401 to pass through is provided on the connecting wall of the coarse ring segment 301 and the fine ring segment 302. The cavity 3012 is located on the inner wall of the coarse ring segment 301. A transmission part is provided on the inner peripheral wall of the thin ring segment 302. This transmission part can be a spline hole 3022.

[0032] The inner circumferential wall of the direct-drive ring 2 is provided with several limiting grooves 202, which are aligned with the transmission groove 201; The outer peripheral wall of the thin ring segment 302 is equipped with direct-acting keys 3021 that correspond one-to-one with the limiting grooves 202. The limiting grooves 202 slide along the direct-acting keys 3021 to prevent the direct-acting ring 2 from deflecting. The thin ring segment 302 and the thick ring segment 301 form a radius difference, which not only allows power to be input through the transmission part, but also allows the direct-acting ring 2 to move axially along the outer wall surface of the thin ring segment 302. This increases the elasticity of the elastic part 11 in a small space and saves axial and radial space.

[0033] Spring ring 1, direct-acting ring 2, outer ring 3, and deflection ring 4 are all concentrically arranged; The cavity 3012 has a concentric arc portion 3012a concentric with the outer ring 3 and an eccentric arc portion 3012b eccentrically disposed with respect to the outer ring 3. The eccentric arc portion 3012b is located on one side of the concentric arc portion 3012a. The groove depth of the eccentric arc portion 3012b is deeper at one end and shallower at the other end. The deeper end of the eccentric arc portion 3012b is connected to one end of the concentric arc portion 3012a. In the initial state, the roller 45 is located within the concentric arc portion 3012a. In the unidirectional mode, the deflection ring 4 rotates to make the roller 45 located within the concentric arc portion 3012b.

[0034] In one embodiment, the multi-mode clutch operates as follows: Specifically, when installing the direct-acting coil 2 onto the spring coil 1, it can be screwed in after being misaligned with the elastic part 11, so that the elastic part 11 is inserted into the reset groove 211. Then, the direct-acting key 3021 is engaged with the limiting groove 202, and the direct-acting coil 2 is installed on the thin ring segment 302. After the product assembly is completed, the external actuator pre-tightens the spring coil 1. The external actuator can be an electromagnet 7, such as... Figure 9 As shown, the working part of the electromagnet 7 abuts against the outer wall of the protrusion 21 on the direct-acting coil 2, as... Figure 10 , 11 As shown, under the action of the electromagnet 7, the direct-acting coil 2 moves closer to the coarse ring section 301 along the thin ring section 302. Since the far end of the elastic part 11 is located in the reset groove 211, the elastic part 11 also moves closer to the coarse ring section 301 along with the direct-acting coil 2. At this time, the inclined column 401 inserted in the transmission groove 201 is subjected to the axial movement of the direct-acting coil 2, and its guide surface 4012 abuts against the transmission surface 2011. Subsequently, the deflection ring 4 is forced to deflect, causing the roller 45 to rotate. Then, the top of the roller 45 is located in the concentric arc section 3012a. At this time, the elastic part 11 is also in a state of tending to be vertical. The roller 45 and the inner shaft 5 form a bearing cooperation. At this time, the rotation of the inner shaft 5 is completely unaffected by the outer ring 3, and its rotation speed can be lower than the rotation speed of the outer ring 3. After the actuator unit is powered on, the direct-acting coil 2 is continuously pushed towards the coarse ring section 301. When the direct-acting coil 2 is about to approach the end face of the coarse ring section 301, as... Figure 12 , 13 As shown, the distal end of the elastic part 11 bends inward. At this time, the deformation of the elastic part 11 increases and the elastic force continues to increase. The inclined column 401 is affected by the transmission groove 201, which still causes the deflection ring 4 to deflect further, causing the position of the roller 45 in the cavity 3012 to change again. At this time, the roller 45 is located in the eccentric arc part 3012b. The component plays a one-way function. The outer ring 3 acts as the input shaft and drives the inner shaft 5 as the output shaft to rotate. When the actuator unit is powered off, the single function of the component is released, the elastic force of the elastic part 11 is released, and the originally deformed elastic part 11 is reset, pushing the abutment surface 212 to move the direct-acting ring 2 away from the coarse ring section 301. At this time, the inclined column 401 contacts the transmission groove 201, causing the deflection ring 4 to deflect in the opposite direction. At this time, the roller 45 returns to the concentric arc part 3012b and returns to the pre-compression state.

[0035] In summary, this clutch, by incorporating a slanted post 401, allows the direct-acting ring 2 to engage and disengage in a one-way mode during axial movement. The overall structure is compact and saves radial space. The inclusion of a spring ring 1 within the reset groove 211 ensures that the direct-acting ring 2 resets under spring force after the actuator unit is de-energized. Multiple elastic parts 11 further stabilize the axial movement of the direct-acting ring 2, ensuring even force distribution. This avoids the problems of existing structures, which are larger, occupy more space, hindering compact and lightweight design of the transmission system, and where the deflection ring 4 often relies on a single force point or a single-sided drive mechanism to engage or disengage the clutch, leading to jamming.

[0036] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A multi-mode clutch with axial control, characterized in that: include The outer ring (3) has multiple cavities (3012) spaced apart along its circumference on its inner circumferential surface. The deflection ring (4) has multiple pockets (402) spaced apart along its circumference. Each pocket (402) is provided with a roller (45). The roller (45) corresponds to and cooperates with the cavity (3012). The deflection ring (4) is positioned between the inner circumferential surface of the outer ring (3) and the outer circumferential surface of the inner shaft (5). An inclined column (401) protrudes from one side of the deflection ring (4). A spring coil (1) is fixedly connected to an outer ring (3), and the inner peripheral wall of the spring coil (1) extends inward to have an elastic part (11). And a direct-acting ring (2), having a reset groove (211) and a transmission groove (201), the direct-acting ring (2) is slidably connected to the outer ring (3) along the axial direction of the outer ring (3); the elastic part (11) is inserted into the reset groove (211); the inclined column (401) is inserted into the transmission groove (201), so that the deflection ring (4) can rotate with the axial movement of the direct-acting ring (2), when the direct-acting ring (2) moves toward the outer ring, the elastic deformation of the elastic part (11) gradually increases, when the direct-acting ring (2) is in a free state, the elastic force of the elastic part (11) is released, driving the direct-acting ring (2) to reset; when the deflection ring (4) rotates to different positions of the roller (45) in the cavity (3012), the clutch is in different working modes.

2. The axially controlled multi-mode clutch according to claim 1, characterized in that: The inclined column (401) is provided in no less than two and is integrally formed with the deflection ring (4). The inclined column (401) has inclined guide surfaces (4012) on both sides. The roller (45) is confined within the pocket (402) by an elastic element. The side of the pocket (402) where the elastic element is installed is the first position (43), and the other side is the second position (44). The rotation direction of the outer ring (3) from the first position (43) to the second position (44) is the first rotation direction. The guide surface (4012) gradually tilts in the first rotation direction along the deflection ring (4) to the spring ring (1).

3. The axially controlled multi-mode clutch according to claim 2, characterized in that: The two sides of the transmission groove (201) are inclined transmission surfaces (2011), and the transmission surfaces (2011) are parallel to the guide surface (4012).

4. The axially controlled multi-mode clutch according to claim 1, characterized in that: The elastic part (11) is integrally formed with the spring coil (1). At least two elastic parts (11) are provided along the radial direction of the spring coil (1). The inner end of the elastic part (11) is a free end. The inner end of the linear motion coil (2) has a curved protrusion (21), which corresponds one-to-one with the elastic part (11). The gap between the protrusion (21) and the linear motion coil (2) forms the reset groove (211), and the free end is located in the reset groove (211).

5. The axially controlled multimode clutch according to claim 1, characterized in that: The outer ring (3) has an integrally formed coarse ring segment (301) and a fine ring segment (302), the outer diameter of the coarse ring segment (301) is larger than the outer diameter of the fine ring segment (302), and the cavity (3012) is located on the inner wall of the coarse ring segment (301). The inner circumferential wall of the thin ring segment (302) is provided with a transmission part.

6. The axially controlled multimode clutch according to claim 5, characterized in that: The inner peripheral wall of the direct-drive ring (2) is provided with a plurality of limiting grooves (202), which are aligned with the transmission groove (201); The outer peripheral wall of the thin ring segment (302) is provided with linear keys (3021) that correspond one-to-one with the limiting groove (202). The linear ring (2) moves axially along the thin ring segment (302) so that the limiting groove (202) slides along the linear key (3021).

7. The axially controlled multimode clutch according to claim 4, characterized in that: The elastic part (11) gradually narrows from its root to its free end.

8. The axially controlled multimode clutch according to claim 2, characterized in that: The pocket (402) has a boss (41) on one side, and there is a gap between the two ends of the boss (41) and the pocket (402); The elastic element is a spring sheet (42), which is arranged in a cross pattern. The root of the spring sheet (42) has a flange, and the spring sheet (42) is secured to the boss (41) by the flange.

9. The axially controlled multimode clutch according to claim 8, characterized in that: The outer end of the boss (41) has an outward convex arc (411), which restricts the spring sheet (42) from sliding radially out of the boss (41).

10. The axially controlled multimode clutch according to claim 1, characterized in that: The spring coil (1), the direct-acting coil (2), the outer ring (3), and the deflection ring (4) are all arranged concentrically; The cavity (3012) has a concentric arc portion (3012a) concentric with the outer ring (3) and an eccentric arc portion (3012b) eccentric with the outer ring (3), the eccentric arc portion (3012b) being located on one side of the concentric arc portion (3012a); The groove of the eccentric arc portion (3012b) is deeper at one end and shallower at the other end, and the deeper end of the eccentric arc portion (3012b) is connected to one end of the concentric arc portion (3012a). In the initial state, the roller (45) is located in the concentric arc portion (3012a). In the unidirectional mode, the deflection ring (4) rotates to make the roller (45) located in the concentric arc portion (3012b).

Images