Self-aligning roller type one-way clutch

Abstract

A self-aligning roller type one-way clutch comprises an outer ring, protruding blocks, rollers, connecting bolts, shifting forks, springs and an inner ring, the inner side of the outer ring is fixedly connected with inner grooves in the outer sides of the protruding blocks, and the protruding blocks are annularly and evenly distributed on the inner side of the outer ring. One end of the spring sleeves the bump spring hole A, and the other end of the spring sleeves the small end of the shifting fork; arc grooves of the shifting forks are attached to the rollers, and the rollers on the two sides are connected through connecting bolts; the pin roller is embedded between the outer ring and the inner ring, one side abuts against the small end of the protruding block, the outer side is attached to the inner side of the outer ring, and the inner side abuts against the outer edge of the inner ring. The pin rollers are attached to the outer ring in an inclined plane mode, the pin rollers and the inner ring are V-shaped groove abutting spherical surfaces, the stress decomposition effect of the inclined planes is achieved, the bearing capacity can be effectively improved, the starting load of the friction coupler and the safety clutch can be improved, the starting frequency is reduced, and safety is good. Vibration in operation is decomposed into axial stress on the two sides, the axial stress is effectively reduced after being buffered by the damping rubber mat, and the damping performance is good; the utility model can automatically align and has strong lateral unbalance loading resistance.

Description

Technical Field

[0001] This utility model belongs to the field of clutches, and in particular a roller-type one-way clutch. Background Technology

[0002] A roller-type one-way clutch typically consists of an outer ring, rollers, a spring, and an inner ring. The outer or inner ring has several evenly distributed grooves, forming an inner ratchet with an outer ring or an outer ratchet with an inner ring structure. The rollers and springs are located in the grooves of the outer or inner ring. One end of the spring is pressed against the platform step of the groove, and the other end is pressed against the roller, pre-tightening the roller and pushing it towards the inclined step.

[0003] Currently, roller-type one-way clutches are widely used in various mechanical systems, especially in applications requiring one-way transmission and overload protection. For example, when the one-way clutch rotates clockwise, the rollers move in the groove and compress the spring, at which point the clutch is not locked. Conversely, when the clutch rotates counterclockwise, the rollers wedge into the inclined step of the groove, and the clutch locks. Another example is that when the engine is starting, the one-way clutch can ensure that the engine starts smoothly. When the load changes and causes the driven end speed to exceed that of the driving end, the rollers automatically disengage from the inclined step, releasing the lock, causing the clutch to slip and protecting the engine.

[0004] However, such structures are prone to jamming due to overload and insufficient concentricity and perpendicularity. Excessive perpendicularity will generate lateral torque, causing lateral unbalanced load; excessive concentricity will cause axial movement during operation, resulting in periodic fluctuating loads. Therefore, the requirements for concentricity and perpendicularity are high. Moreover, when jammed, disassembly is difficult and maintenance is inconvenient. To prevent overload, friction couplings or safety clutches are usually equipped with overload protection devices, which have complex structures and require high manufacturing precision. However, friction couplings and safety clutches can only provide overload protection through slippage, and cannot prevent jamming caused by insufficient concentricity and perpendicularity. Although slippage can provide overload protection for the parts to be protected to a certain extent, it may cause transmission failure and damage to other parts. Therefore, the starting load and starting frequency of friction couplings and safety clutches must be limited. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a self-aligning roller type one-way clutch that can provide overload protection, shock absorption, and resistance to lateral load imbalance.

[0006] The present invention provides a self-aligning roller-type one-way clutch, comprising: an outer ring, a protrusion, rollers, connecting bolts, a shift fork, a spring, and an inner ring. The outer ring is located on the outside of the clutch, and its inner side is fitted with the inner groove on the outer side of the protrusion for a fixed connection. Six protrusions are evenly distributed in a ring on the inner side of the outer ring. One end of the spring is sleeved in the spring hole A at the large end of the protrusion, and the other end is sleeved in the small end of the shift fork. The arc groove at the large end of the shift fork fits into the rollers, and the connecting bolts connect the two rollers. The rollers are embedded in the middle of the outer ring and the inner ring, with one side close to the small end of the protrusion, the outer side fitting into the inner side of the outer ring, and the inner side close to the outer edge of the inner ring.

[0007] The outer edge of the outer ring is cylindrical, and the inner side is a V-shaped ring. The angle of the V-shaped ring is consistent with the inner groove on the outer side of the protrusion.

[0008] The protrusion is an arc-shaped V-shaped block with an inner groove on the outer side and an outer convexity on the inner side, and both sides are flat. The angle of the inner groove on the outer side is consistent with the inner V-shaped ring of the outer ring, and the angle of the outer convexity is consistent with the V-shaped groove formed by the mirror symmetry of the roller and the inner V-shaped ring of the outer ring. A spring hole A is provided on the large end face.

[0009] The rollers are conical rollers with a central hole, and the V-shaped grooves formed by their mirror-symmetrical arrangement have the same angle as the inner side of the protrusion and the inner side of the V-shaped ring.

[0010] The connecting bolt includes: a double-ended screw, a nut, a washer, and a shock-absorbing rubber pad. The nut is fitted onto both ends of the double-ended screw, the washer is fitted onto the double-ended screw and located inside the nuts at both ends, and the shock-absorbing rubber pad is fitted onto the double-ended screw and located inside the washers at both ends.

[0011] The shift fork is made of gray cast iron and is cylindrical at both ends. The V-shaped outer chamfer angle at the large end is consistent with the V-shaped groove formed by the mirror symmetrical arrangement of the rollers. At the outer end of the V-shaped outer chamfer at the large end, there is an arc groove that fits the conical surface of the roller.

[0012] The spring is a cylindrical compression spring.

[0013] The inner ring has a straight hole with a keyway, a spherical outer edge, and flat sides.

[0014] like Figure 1 As shown, the outer ring is fixedly connected to the protrusion, and the roller is embedded between the outer and inner rings, with one side close to the small end of the protrusion. During operation, if the outer ring attempts to rotate clockwise relative to the inner ring, the small end of the protrusion will be embedded between the V-groove of the roller and the inner side of the outer ring, locking the two together and transmitting torque. When the outer ring rotates counterclockwise relative to the inner ring, the small end of the protrusion separates from the roller, the locking is released, and the roller forms a rolling pair with the outer and inner rings, similar to a rolling bearing. The outer ring no longer transmits torque to the inner ring. One end of the spring is sleeved in the spring hole A at the large end of the protrusion, and the other end is sleeved in the small end of the shift fork. The arc groove at the large end of the shift fork fits against the roller. The spring provides support and buffer for the roller, preventing the roller from pressing against the large end of the protrusion and causing jamming.

[0015] The rollers of this invention are tapered rollers with a central hole that fits against the outer ring on an inclined surface, and V-grooves that closely adhere to the inner ring on a spherical surface. Both of these features contribute to the stress decomposition effect of the inclined surfaces, converting some radial stress into axial stress on both sides, thus reducing radial stress. When the transmission system starts, some of the impact load generated is also correspondingly decomposed into axial stress on both sides and absorbed by the shock-absorbing pads, effectively reducing the impact load and thereby improving the clutch's load-bearing capacity. Periodic fluctuation loads caused by concentricity deviations, as well as vibrations caused by other reasons, are also correspondingly decomposed into axial stress on both sides and buffered by the shock-absorbing pads, reducing load fluctuations. This invention can also perform lateral deflection within the eccentricity angle β range, automatically adjusting the center and eliminating lateral torque caused by perpendicularity deviations and other reasons; effectively reducing the impact of concentricity and perpendicularity deviations.

[0016] The V-shaped outer chamfer at the large end of the shift fork of this utility model fits into the V-shaped groove of the roller, so that the spring thrust is concentrated in the center of the roller, effectively reducing the lateral stress caused by bending when the spring is squeezed; the gray cast iron has good wear resistance and contains graphite, both of which have self-lubricating function, which can effectively reduce roller wear.

[0017] When overload causes the clutch to seize, simply loosen the nuts on the connecting bolts. The axial forces generated by the stress decomposition on the inclined plane will push the rollers to both sides, disengaging them from the inner and outer rings and releasing the clutch.

[0018] Compared with the existing technology, the present invention has the following advantages:

[0019] This invention features strong load-bearing capacity and good safety. The rollers are tapered rollers with a central hole that fits into the outer ring with an inclined surface, and the inner ring has a V-groove that closely contacts the spherical surface, both of which can play a role in stress decomposition of the inclined surface. During startup, part of the impact load generated is also decomposed into axial stress on both sides, which is absorbed by the shock-absorbing rubber pads, effectively reducing the impact load and improving the load-bearing capacity. It can significantly improve the starting load of friction couplings and safety clutches, and effectively reduce the starting frequency.

[0020] This invention has good shock absorption properties. The periodic fluctuation load caused by concentricity deviation and vibration caused by other reasons are all decomposed into axial stress on both sides, which are effectively reduced after being buffered by the shock-absorbing rubber pad.

[0021] This invention has strong resistance to lateral load and can automatically align itself to eliminate lateral torque caused by vertical deviation and other reasons.

[0022] This invention is highly versatile. It effectively reduces the impact of concentricity and perpendicularity deviations, has low manufacturing and installation precision requirements, and can adapt to more transmission systems.

[0023] The shift fork of this utility model is made of gray cast iron. The V-shaped outer chamfer at the large end fits the V-shaped groove of the roller, so that the spring thrust is concentrated in the center of the roller, effectively reducing the lateral stress caused by bending when the spring is squeezed. Gray cast iron has good wear resistance and contains graphite, which has a self-lubricating function and can effectively reduce roller wear.

[0024] This invention is easy to maintain. When overload causes the clutch to seize, simply loosen the nut of the connecting bolt. The axial force generated by the stress decomposition of the inclined plane will push the rollers to both sides, detaching them from the contact with the inner and outer rings, thus loosening the clutch. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of this utility model;

[0026] Figure 2 Left view schematic diagram of this utility model;

[0027] Figure 3 A schematic diagram of the protrusion structure of this utility model;

[0028] Figure 4 Left view schematic diagram of the protrusion of this utility model;

[0029] Figure 5 A schematic diagram of the shift fork structure of this utility model;

[0030] Figure 6 A schematic diagram of the connecting bolt structure of this utility model. Detailed Implementation

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, a self-aligning roller type one-way clutch includes: an outer ring 1, a protrusion 2, a roller 3, a connecting bolt 4, a shift fork 5, a spring 6, and an inner ring 7. The outer ring 1 is located on the outside of the clutch, and its inner side is fitted with the inner groove on the outer side of the protrusion 2 for fixed connection. Six protrusions 2 are evenly distributed in a ring on the inner side of the outer ring 1. One end of the spring 6 is sleeved in the spring hole A at the large end of the protrusion 2, and the other end is sleeved in the small end of the shift fork 5. The arc groove at the large end of the shift fork 5 fits against the roller 3, and the connecting bolt 4 connects the two rollers 3. The roller 3 is embedded in the middle of the outer ring 1 and the inner ring 7, with one side close to the small end of the protrusion 2, the outer side close to the inner side of the outer ring 1, and the inner side close to the outer edge of the inner ring 7.

[0032] The outer edge of the outer ring 1 is cylindrical, and the inner side is a V-shaped ring. The angle of the V-shaped ring is consistent with the inner groove on the outer side of the protrusion 2.

[0033] The protrusion 2 is an arc-shaped V-shaped block with an inner groove on the outer side and an outer protrusion on the inner side, and both sides are flat. The angle of the inner groove on the outer side is consistent with the inner V-shaped ring of the outer ring 1, and the angle of the outer protrusion on the inner side is consistent with the V-shaped groove formed by the roller 3 in mirror symmetry, and consistent with the inner V-shaped ring of the outer ring 1. A spring hole A is provided on the large end face.

[0034] The roller 3 is a conical roller with a central hole. The V-shaped groove formed by the mirror symmetrical arrangement has the same angle as the inner side of the protrusion 2 and the inner side of the V-shaped ring of the outer ring 1.

[0035] The connecting bolt 4 includes: a double-ended screw 4-1, a nut 4-2, a washer 4-3, and a shock-absorbing rubber pad 4-4. The nut 4-2 is fitted onto both ends of the double-ended screw 4-1. The washer 4-3 is fitted onto the double-ended screw 4-1 and is located inside the nuts 4-2 at both ends. The shock-absorbing rubber pad 4-4 is fitted onto the double-ended screw 4-1 and is located inside the washers 4-3 at both ends.

[0036] The shift fork 5 is made of gray cast iron and is cylindrical at both ends. The V-shaped outer chamfer angle at the large end is consistent with the V-shaped groove formed by the mirror symmetrical arrangement of the rollers 3. At the outer end of the V-shaped outer chamfer at the large end, there is an arc groove that fits the conical surface of the roller 3.

[0037] The spring 6 is a cylindrical compression spring.

[0038] The inner ring 7 has a straight hole with a keyway, a spherical outer edge, and flat sides.

Claims

1. A self-aligning roller type one-way clutch, comprising: The clutch comprises an outer ring, protrusions, rollers, connecting bolts, a shift fork, a spring, and an inner ring. The outer ring is located outside the clutch, and six protrusions are evenly distributed in a ring on the inner side of the outer ring. One end of the spring is fitted into the spring hole A at the large end of the protrusion, and the other end is fitted into the small end of the shift fork. The arc groove at the large end of the shift fork fits against the roller. The roller is embedded between the outer ring and the inner ring, with one side close to the small end of the protrusion, the outer side close to the inner side of the outer ring, and the inner side close to the outer edge of the inner ring. The key feature is that the inner side of the outer ring fits against the inner groove on the outer side of the protrusion, fixing the connection... Connect the rollers on both sides with connecting bolts; the outer ring has a cylindrical outer edge and a V-shaped inner ring; the protrusion is an arc-shaped V-block with an inner groove on the outer side and an outer protrusion on the inner side, and both sides are flat. The large end face has a spring hole A; the rollers are conical rollers with a central hole, arranged in a mirror symmetrical manner to form a V-shaped groove; the shift fork is a cylinder with large and small ends, and the outer chamfer angle of the large end V-shape is consistent with the V-shaped groove formed by the mirror symmetrical arrangement of the rollers. The outer end of the large end V-shape chamfer has an arc groove that fits the conical surface of the roller.

2. The self-aligning roller type one-way clutch according to claim 1, characterized in that: The connecting bolt includes: a double-ended screw, a nut, a washer, and a shock-absorbing rubber pad. The nut is fitted onto both ends of the double-ended screw, the washer is located inside the nuts at both ends, and the shock-absorbing rubber pad is located inside the washers at both ends.

3. A self-aligning roller type one-way clutch according to claim 1, characterized in that: The inner ring has a straight hole with a keyway, a spherical outer edge, and flat sides.

Images