Overload protection coupling

Abstract

The utility model relates to the technical field of couplings, and discloses an overload protection coupling which comprises a center sliding sleeve, an impact half coupling and an escape ring. The impact half coupling and the escape ring are both connected to the center sliding sleeve in a sleeving mode, first meshing teeth are arranged on the impact half coupling, second meshing teeth are arranged on the escape ring, and the first meshing teeth are meshed with the second meshing teeth; third meshing teeth are arranged at the end of the center sliding sleeve, fourth meshing teeth are arranged on the inner circle of the escape ring, the third meshing teeth are meshed with the fourth meshing teeth, and the escape ring is arranged on the outer circle of the center sliding sleeve in a sliding mode and slides up and down relative to the center sliding sleeve. The phenomenon that after a power device is overloaded, the coupler cannot be detached, driven equipment suddenly stops and is damaged is effectively avoided, and after overload is eliminated, the coupler is manually reset for transmission.

Description

Technical Field

[0001] The utility model relates to the technical field of couplings, in particular to an overload protection coupling. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part, rotating together during the transmission of motion and power, and does not disengage under normal circumstances.

[0003] A general coupling has a power device installed on one end and a driven device on the other end. The power device drives the driven device to rotate through the coupling. However, sometimes the power device may be overloaded, causing it to stop. At this time, the driven device is still running at high speed. When the power device stops, the coupling will stop, thereby forcing the driven device to stop, which may cause damage to the driven device. Utility Model Content

[0004] In order to effectively avoid damage caused by a driven device suddenly stopping when a power device stops operating, the utility model provides a coupling with overload protection.

[0005] The utility model provides an overload protection coupling adopting the following technical solution:

[0006] An overload protection coupling comprises a central sliding sleeve, an impact half coupling and an escape ring;

[0007] The impact half coupling and the escape ring are both sleeved on the central sliding sleeve, the impact half coupling is provided with a first tooth, the escape ring is provided with a second tooth, and the first tooth and the second tooth are meshed with each other;

[0008] The end of the central sleeve is provided with a third tooth, the inner ring of the escape ring is provided with a fourth tooth, the third tooth and the fourth tooth are meshed with each other, and the escape ring is slidably arranged on the outer ring of the central sleeve and slides up and down relative to the central sleeve.

[0009] By adopting the above technical scheme, the coupling is arranged into two parts, namely, an impact half coupling and an escape ring, which are connected by the first tooth and the second tooth, and the escape ring and the center sleeve are connected by the third tooth and the fourth tooth. When the power device is normal, the impact half coupling and the escape ring rotate at the same time. After the power device is overloaded, the power device will generate vibrations of different frequencies, causing the escape ring to move upward relative to the center sleeve, and the impact half coupling is separated from the escape ring. The escape ring cannot rotate relative to the center sleeve under the action of the third tooth and the fourth tooth, but there is no restriction between the impact half coupling and the center sleeve, and they can still rotate relative to each other. Under the action of inertia, the impact half coupling and the driven device still rotate and will not stop suddenly, thereby effectively protecting the driven device from damage.

[0010] Preferably, a plurality of disc spring assemblies are circumferentially arranged on the escape ring, and the disc spring assemblies are clamped on the center sleeve. A stepped slot is arranged on the center sleeve, and the slot includes a first step surface and a second step surface. The disc spring assembly is compressed after being vibrated and slides from the first step surface to the second step surface.

[0011] By adopting the above technical solution, after the power device is overloaded, the escape ring is detached, but it is easy to fall back to the original position automatically, so a disc spring assembly is set. After being vibrated, it is compressed from the first step surface to the second step surface. The force of the disc spring assembly resists the center sleeve, so the escape ring will not slide back to the original position after being detached, effectively realizing the "holding" phenomenon after the coupling is disengaged.

[0012] Preferably, the disc spring assembly includes a spring and a hemispherical compression block, the spherical side of the compression block is movably mounted in the slot, and the plane end of the compression block is connected to the spring.

[0013] By adopting the above technical solution, in order to enable the disc spring assembly to move from the first step surface to the second step surface, a hemispherical compression block and a spring are set in the disc spring assembly. After being vibrated, the spring is compressed and becomes shorter after deformation. The hemispherical compression block will slide more easily to the second step surface. Under the thrust of the spring, the compression block is squeezed, causing the compression block to be tightly against the second step surface and unable to fall, thereby effectively achieving the "holding" phenomenon after the coupling is disengaged.

[0014] Preferably, a mounting hole is provided on the escape ring, the disc spring assembly passes through the mounting hole and contacts the slot, and fixing bolts are provided on the outer ends of the spring and the escape ring.

[0015] By adopting the above technical solution, the disc spring assembly is fixed on the escape ring. To prevent the disc spring assembly from escaping, a mounting hole is directly opened on the escape ring, and the spring is placed in the hole to prevent displacement after the spring is deformed. The spring and the end of the escape ring are fixed with fixing bolts, thereby effectively realizing the implementation of the disc spring assembly.

[0016] Preferably, a bearing is provided on the central sliding sleeve, and the bearing is arranged between the central sliding sleeve and the impact half coupling.

[0017] By adopting the above technical solution and installing the bearing, the friction between the center sleeve and the impact half coupling during the rotation process can be effectively reduced.

[0018] Preferably, a fixing component is provided between the central sleeve and the impact half-coupling, the fixing component comprises a gasket and a clamping block, and the fixing component is installed on one side of the bearing and is located at the end of the central sleeve.

[0019] By adopting the above technical solution, a fixing component is provided to fix the bearing in the central sleeve so that the bearing will not break free, thereby effectively realizing the operation of the coupling.

[0020] Preferably, the gasket is circumferentially provided with a plurality of inclined plates, the inclined plates are inclined toward an end away from the bearing, and the agglomerate is installed at an end of the gasket away from the first bearing.

[0021] By adopting the above technical solution, the inclined sheet fits closely with the agglomerate, and the gasket wraps the agglomerate, which effectively avoids the agglomerate from being worn, makes the installation tighter, and effectively realizes the operation of the coupling.

[0022] In summary, the utility model has the following beneficial technical effects:

[0023] 1. The escape ring can move upward relative to the center sleeve, and the impact half coupling and the escape ring can be separated. Under the action of the third and fourth teeth, the escape ring cannot rotate relative to the center sleeve, but there is no restriction between the impact half coupling and the center sleeve, and they can still rotate relatively. Under the action of inertia, the impact half coupling and the driven equipment can still rotate and will not stop suddenly, which effectively protects the driven equipment from damage;

[0024] 2. After being vibrated, the disc spring assembly is compressed from the first step surface to the second step surface, and the force of the disc spring assembly presses against the center sleeve, so the escape ring will not slide back to its original position after being disengaged, effectively achieving the "holding" phenomenon after the coupling is disengaged;

[0025] 3. Install the bearing to effectively reduce the friction between the center sleeve and the impact half coupling during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a disassembled diagram of parts of an overload protection coupling of the utility model.

[0027] Figure 2 The utility model is an external view of an escape ring of an overload protection coupling combined with an impact half coupling.

[0028] Figure 3 The utility model is a cross-sectional view of an escape ring of an overload protection coupling and an impact half coupling combined together.

[0029] Figure 4 The utility model is an external view of an escape ring of an overload protection coupling after being separated from an impact half coupling.

[0030] Figure 5 The utility model is a cross-sectional view of an escape ring and an impact half coupling of an overload protection coupling after being separated.

[0031] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0032] Explanation of the accompanying drawings: 1. Center sleeve; 2. Impact half coupling; 3. Escape ring; 4. First tooth; 5. Second tooth; 6. Third tooth; 7. Fourth tooth; 8. Disc spring assembly; 9. First step surface; 10. Second step surface; 11. Compression block; 12. Spring; 13. Mounting hole; 14. Bearing; 15. Fixing bolt; 16. Gasket; 17. Card block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0035] The utility model discloses an overload protection coupling. Figure 1 The coupling includes a central sleeve 1, a disc spring assembly 8, an impact half coupling 2 and an escape ring 3.

[0036] The impact half coupling 2 and the escape ring 3 are both sleeved on the central sleeve 1. The impact half coupling 2 is provided with a first tooth 4, and the escape ring 3 is provided with a second tooth 5. The first tooth 4 and the second tooth 5 are meshed with each other. During normal operation, the two are meshed with each other. After meshing, the impact half coupling 2 can drive the escape ring 3 to rotate.

[0037] The center sleeve 1 is provided with a bearing 14. In the present application, two bearings 14 are placed, and both bearings 14 are arranged between the center sleeve 1 and the impact half coupling 2. One is arranged at the end of the center sleeve 1, and the other is arranged at the end close to the escape ring 3. The installation of the bearing 14 effectively reduces the friction between the center sleeve 1 and the impact half coupling 2 during the rotation process.

[0038] After the motor is overloaded, the escape ring 3 breaks free from the impact half-coupling 2, and the first tooth 4 separates from the second tooth 5. At this time, the impact half-coupling 2 is not restrained. After the center sleeve 1 stops rotating, the impact half-coupling 2 continues to rotate due to inertia. The installation of the bearing 14 effectively reduces the wear of the impact half-coupling 2 and effectively avoids damage caused by sudden stop of the driven equipment.

[0039] A fixing assembly is also provided between the center sleeve 1 and the impact half coupling 2. The fixing assembly includes a gasket 16 and a clamping block 17. The fixing assembly is installed on one side of the bearing 14 and is located at the end of the center sleeve 1. The fixing assembly is provided to fix the bearing 14 in the center sleeve 1 so that it will not break free and effectively realize the operation of the coupling.

[0040] A plurality of inclined sheets are arranged on the circumference of the gasket 16, and the inclined sheets are inclined toward the end away from the bearing 14, and the agglomerate 17 is installed at the end of the gasket 16 away from the first bearing 14. The inclined sheets are closely fitted with the agglomerate 17, and the gasket 16 wraps the agglomerate 17, which effectively prevents the agglomerate 17 from being worn, and makes the installation tighter, so as to effectively realize the operation of the coupling.

[0041] A mounting hole 13 is provided on the escape ring 3, and the disc spring assembly 8 passes through the mounting hole 13 and contacts the central sliding sleeve 1, wherein fixing bolts 15 are provided on the outer ends of the disc spring assembly 8 and the escape ring 3, and the disc spring assembly is fixed to the escape ring 3 by the fixing bolts 15 to prevent the disc spring assembly 8 from detaching from the escape ring 3 during the compression process.

[0042] There are multiple groups of disc spring assemblies 8, and the multiple groups of disc spring assemblies 8 are circumferentially fixed on the escape ring 3. In order to prevent the disc spring assembly 8 from breaking free, a mounting hole 13 is directly opened on the escape ring 3, and the disc spring assembly 8 is placed in the hole to prevent the disc spring assembly 8 from displacement after deformation. The disc spring assembly 8 and the end of the escape ring 3 are fixed by fixing bolts 15, thereby effectively realizing the implementation of the disc spring assembly 8.

[0043] A third tooth 6 is provided at the end of the central sleeve 1, and a fourth tooth 7 is provided at the inner ring of the escape ring 3. The third tooth 6 and the fourth tooth 7 are meshed with each other. The escape ring 3 is slidably provided on the outer ring of the central sleeve 1 and slides up and down relative to the central sleeve 1.

[0044] The coupling is configured to be divided into two parts, an impact half coupling 2 and an escape ring 3, which are connected by the first tooth 4 and the second tooth 5. The escape ring 3 and the center sleeve 1 are connected by the third tooth 6 and the fourth tooth 7. After the power device is overloaded, vibrations of different frequencies will be generated, causing the escape ring 3 to move upward relative to the center sleeve 1, and the impact half coupling 2 is separated from the escape ring 3. The purpose of setting the third tooth 6 and the fourth tooth 7 is to make the escape ring 3 only move up and down and cannot rotate relative to the center sleeve 1.

[0045] Reference Figure 2 and Figure 3 , wherein a stepped slot is provided on the central sleeve 1, the slot includes a first step surface 9 and a second step surface 10, the disc spring assembly 8 passing through the escape ring 3 is clamped on the central sleeve 1, and the disc spring assembly 8 is compressed after being vibrated and slides from the first step surface 9 to the second step surface 10.

[0046] After the power device is overloaded, the escape ring 3 is detached, but it is easy to automatically fall back to the original position, so a disc spring assembly 8 is set. After being vibrated, it is compressed from the first step surface 9 to the second step surface 10. The force of the disc spring assembly 8 resists the center sleeve 1, so the escape ring 3 will not slide back to the original position after being detached, effectively realizing the "retention" phenomenon after the coupling is disengaged. That is, after the escape ring 3 breaks free from the impact half coupling 2, it maintains this state, and the escape ring 3 will not fall back to the original position. After the overload state is checked, the escape ring 3 is manually restored to its original position.

[0047] The disc spring assembly 8 includes a spring 12 and a hemispherical compression block 11 . The spherical side of the compression block 11 is movably installed in the slot, and the plane end of the compression block 11 is connected to the spring 12 .

[0048] Reference Figure 4-6 In order to enable the disc spring assembly 8 to move from the first step surface 9 to the second step surface 10, a hemispherical compression block 11 and a spring 12 are set in the disc spring assembly 8. After being vibrated, the spring 12 is compressed and becomes shorter after deformation. The hemispherical compression block 11 will slide more easily to the second step surface 10. Under the thrust of the spring 12, the compression block 11 is squeezed, causing the compression block 11 to be tightly pressed against the second step surface 10 and unable to fall, thereby effectively achieving the "holding" phenomenon after the coupling is disengaged.

[0049] The implementation principle of an overload protection coupling in an embodiment of the utility model is as follows: the coupling is arranged into two parts, namely, an impact half coupling 2 and an escape ring 3, which are connected by a first tooth 4 and a second tooth 5, and the escape ring 3 is connected to the center sleeve 1 by a third tooth 6 and a fourth tooth 7. When the power device is normal, the impact half coupling 2 and the escape ring 3 rotate simultaneously. After the power device is overloaded, the power device will generate vibrations of different frequencies, and the disc spring assembly 8 moves from the first step surface 9 to the second step surface 10, causing the escape ring 3 to move upward relative to the center sleeve 1, and the impact half coupling 2 is separated from the escape ring 3. Under the action of the third tooth 6 and the fourth tooth 7, the escape ring 3 cannot rotate relative to the center sleeve 1, but there is no restriction between the impact half coupling 2 and the center sleeve 1, and they can also rotate relative to each other. Under the action of inertia, the impact half coupling 2 and the driven device still rotate and will not stop suddenly, thereby effectively protecting the driven device from damage.

[0050] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A coupling with overload protection, characterized in that: It comprises a central sliding sleeve (1), an impact half coupling (2) and an escape ring (3); The impact half coupling (2) and the escape ring (3) are both sleeved on the central sliding sleeve (1); the impact half coupling (2) is provided with a first tooth (4); the escape ring (3) is provided with a second tooth (5); the first tooth (4) and the second tooth (5) are meshed with each other; The end of the central sliding sleeve (1) is provided with a third tooth (6), the inner ring of the escape ring (3) is provided with a fourth tooth (7), the third tooth (6) and the fourth tooth (7) are meshed with each other, and the escape ring (3) is slidably arranged on the outer ring of the central sliding sleeve (1) and slides up and down relative to the central sliding sleeve (1).

2. The overload protection coupling according to claim 1, characterized in that: A plurality of disc spring assemblies (8) are circumferentially arranged on the escape ring (3), the disc spring assemblies (8) being clamped on the central sliding sleeve (1), the central sliding sleeve (1) being provided with a stepped clamping groove, the clamping groove comprising a first step surface (9) and a second step surface (10), the disc spring assemblies (8) being compressed after being vibrated and sliding from the first step surface (9) to the second step surface (10).

3. The overload protection coupling according to claim 2, characterized in that: The disc spring assembly (8) comprises a spring (12) and a hemispherical compression block (11); the spherical side of the compression block (11) is movably mounted in the slot; and the plane end of the compression block (11) is connected to the spring (12).

4. The overload protection coupling according to claim 3, characterized in that: The escape ring (3) is provided with a mounting hole (13), the disc spring assembly (8) passes through the mounting hole (13) and contacts the clamping groove, and fixing bolts (15) are provided at the outer ends of the spring (12) and the escape ring (3).

5. The overload protection coupling according to claim 1, characterized in that: A bearing (14) is provided on the central sliding sleeve (1), and the bearing (14) is arranged between the central sliding sleeve (1) and the impact half coupling (2).

6. The overload protection coupling according to claim 5, characterized in that: A fixing component is provided between the central sleeve (1) and the impact half coupling (2), the fixing component comprising a gasket (16) and a clamping block (17), and the fixing component is installed on one side of the bearing (14) and is located at the end of the central sleeve (1).

7. The overload protection coupling according to claim 6, characterized in that: The outer edge of the gasket (16) is provided with a plurality of inclined plates along the circumferential direction, the inclined plates are inclined toward an end away from the bearing (14), and the agglomeration block (17) is mounted on the end of the gasket (16) away from the bearing (14).

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