Telescopic torque limiting type coupler

Abstract

The utility model belongs to the technical field of couplings, and particularly relates to a telescopic torque limiting type coupler which comprises a telescopic mechanism, locking mechanisms used for being connected with a transmission shaft are installed at the two ends of the telescopic mechanism, each locking mechanism comprises a flange plate, an elastic body is installed in each flange plate, and an extrusion groove is formed in each elastic body. A built-in shaft sleeve is arranged in the elastic body, limiting grooves are formed in the built-in shaft sleeve in a circumferential array mode, rolling columns and limiting balls used for being matched with the extrusion grooves are arranged in the limiting grooves, a flange sleeve is installed on the flange plate, shaft heads matched with the extrusion grooves are installed on the flange sleeve in a circumferential array mode, and a key groove is formed in the built-in shaft sleeve. When the torque is increased, the coupler can be protected, breakage is prevented, when the load is recovered to a safety range, the coupler can automatically recover to an initial state, the service life is further prolonged, and mechanical equipment at the output end of the coupler can be protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of couplings, and in particular relates to a telescopic torque limiting coupling. Background Art

[0002] Telescopic coupling is a mechanical connector for transmitting power, which is composed of multiple overlapping elastic components. Telescopic coupling mainly relies on axial compression deformation to alleviate shaft deviation and vibration. When the shafts at both ends of the coupling deviate, the elastic material in the center of the coupling is compressed and deformed, thereby reducing the deviation and vibration of the shaft. When the shaft transmission torque is reversed, the deformation direction of the coupling elastic component will also reverse, so that the transmission system can achieve a relatively stable operation state.

[0003] For example, the Chinese utility model patent with publication number CN208169360U discloses a telescopic universal coupling, including a telescopic connecting rod, a cross-shaped universal joint is arranged at both ends of the telescopic connecting rod, the telescopic connecting rod includes a transmission shaft and a transmission sleeve sleeved at both ends of the transmission shaft, and the outer end of the inner cavity of the transmission sleeve is provided with a limit device for limiting the travel of the transmission shaft in the two transmission sleeves, and a compression spring is arranged between the blocking plate and the outer end surface of the transmission shaft, which is easy to process and low in cost. However, during the use of the telescopic coupling, when the torque applied to the coupling exceeds the upper limit, it will cause wear or breakage, reducing the service life, and the sealing performance is not good, dust is easily introduced to cause corrosion, affecting the stability of the power transmission. Utility Model Content

[0004] In order to solve the above technical problems, the utility model further proposes a telescopic torque limiting coupling.

[0005] The specific technical scheme of the utility model is as follows: a telescopic torque limiting coupling, including a telescopic mechanism, locking mechanisms for connecting a transmission shaft are installed at both ends of the telescopic mechanism, the locking mechanism includes a flange plate, an elastomer is installed in the flange plate, an extrusion groove is opened in the elastomer, an internal shaft sleeve is arranged in the elastomer, a limiting groove is opened in a circumferential array on the internal shaft sleeve, a rolling column and a limiting ball for cooperating with the extrusion groove are arranged in the limiting groove, a flange sleeve is installed on the flange plate, a shaft head cooperating with the extrusion groove is installed in a circumferential array on the flange sleeve, and a key groove is opened on the internal shaft sleeve.

[0006] Furthermore, the telescopic mechanism comprises an intermediate shaft, a connecting flange is symmetrically connected to the intermediate shaft via a spline, a limiting flange for limiting the movement of the connecting flange is symmetrically installed on the intermediate shaft, and a flange plate is installed on the connecting flange.

[0007] Furthermore, an intermediate is installed between the flange and the connecting flange, and the intermediate is made of polyurethane.

[0008] Furthermore, a telescopic sleeve is sleeved between the two connecting flanges.

[0009] Furthermore, a sealing gasket is provided between the flange sleeve and the flange plate.

[0010] Furthermore, one end of the rolling column is configured to be circular, and the other end of the rolling column is configured to be provided with a groove for storing a limiting ball.

[0011] Furthermore, a cylindrical pin for positioning with the limiting flange is installed on the intermediate shaft.

[0012] Furthermore, an oil circuit is arranged in the connecting flange, and an oil filling port is opened on the connecting flange.

[0013] Beneficial effects:

[0014] The present application comprises the following steps: an elastomer is installed in a flange, an extrusion groove is provided in the elastomer, a built-in sleeve is provided in the elastomer, a limiting groove is provided in a circumferential array on the built-in sleeve, a rolling column and a limiting ball for cooperating with the extrusion groove are provided in the limiting groove, a flange sleeve is installed on the flange, a shaft head cooperating with the extrusion groove is provided in a circumferential array on the flange sleeve, a key groove is provided on the built-in sleeve, the shaft head, the limiting ball and the center hole of the rolling column are tangent, the flange sleeve is threadedly connected to the shaft head, the limiting groove and the extrusion groove together constitute a complete cylindrical hole, the rolling column sleeve is provided in the cylindrical hole, and after the transmission shaft is installed on the built-in sleeve through the key and the key groove, when the torque transmitted by the transmission shaft exceeds the deformation amount of the elastomer, the transmission shaft drives the built-in sleeve, the rolling column and the limiting ball to rotate relative to the elastomer, and because the shaft head is not in the limiting groove, the flange sleeve, the shaft head and the flange remain relatively stationary, so that the torque generated by the transmission shaft can be released through the deformation of the elastomer, so that the elastomer will not drive the flange The disk rotates, thereby protecting the coupling, preventing breakage, extending the service life, and protecting the mechanical equipment at the output end of the coupling. When the torque generated by the transmission shaft decreases and the torque transmitted by the transmission shaft is less than the deformation of the elastic body, the rolling column and the limit ball will fall back into the extrusion groove of the elastic body, so that the built-in sleeve drives the elastomer to rotate through the cooperation of the limit groove, the rolling column, the limit ball and the extrusion groove, and then the elastomer drives the flange to rotate, and the torque generated by the transmission shaft is transmitted to the mechanical equipment through the telescopic mechanism. The elastomer and the built-in sleeve are covered by the flange sleeve, which can increase the sealing inside the coupling, reduce the entry of dust, thereby reducing corrosion and extending the service life. When the torque increases, it can protect the coupling to prevent breakage. When the load returns to a safe range, the coupling can automatically return to its initial state, further extending the service life, and protecting the mechanical equipment at the output end of the coupling. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the built-in shaft sleeve and flange sleeve of the utility model;

[0018] Figure 4 This is a schematic diagram of the elastic body and extrusion groove structure of the utility model;

[0019] Figure 5 It is a schematic diagram of the intermediate shaft and connecting flange structure of the utility model.

[0020] Description of the markings in the figure:

[0021] Telescopic mechanism 1, intermediate shaft 11, connecting flange 12, limiting flange 13, locking mechanism 2, flange plate 21, elastomer 22, extrusion groove 23, built-in sleeve 24, limiting groove 25, rolling column 26, limiting ball 27, flange sleeve 28, shaft head 29, keyway 210, intermediate body 3, telescopic sleeve 4, sealing gasket 5, cylindrical pin 6, oil circuit 7, oil filling port 8. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0024] Example 1: Combination Figures 1 to 4A telescopic torque limiting coupling is described, comprising a telescopic mechanism 1, wherein locking mechanisms 2 for connecting a transmission shaft are installed at both ends of the telescopic mechanism 1, wherein the locking mechanism 2 comprises a flange 21, wherein an elastomer 22 is installed in the flange 21, wherein an extrusion groove 23 is provided in the elastomer 22, wherein an inner sleeve 24 is provided in the elastomer 22, wherein a limiting groove 25 is provided in a circumferential array on the inner sleeve 24, wherein a rolling column 26 and a limiting ball 27 for cooperating with the extrusion groove 23 are provided in the limiting groove 25, wherein a flange sleeve 28 is installed on the flange 21, wherein shaft heads 29 for cooperating with the extrusion groove 23 are installed in a circumferential array on the flange sleeve 28, and wherein a keyway 210 is provided on the inner sleeve 24. The present application comprises an elastic body 22 installed in a flange 21, an extrusion groove 23 is provided in the elastic body 22, a built-in shaft sleeve 24 is provided in the elastic body 22, a limiting groove 25 is provided in a circumferential array on the built-in shaft sleeve 24, a rolling column 26 and a limiting ball 27 for cooperating with the extrusion groove 23 are provided in the limiting groove 25, a flange sleeve 28 is installed on the flange 21, a shaft head 29 cooperating with the extrusion groove 23 is provided in a circumferential array on the flange sleeve 28, a key groove 210 is provided on the built-in shaft sleeve 24, the shaft head 29 and the limiting ball 27 are tangent to the center hole of the rolling column 26, and the flange sleeve The flange sleeve 28 is threadedly connected with the shaft head 29, the limiting groove 25 and the extrusion groove 23 together form a complete cylindrical hole, the rolling column 26 is sleeved in the cylindrical hole, and the transmission shaft is installed on the built-in shaft sleeve 24 through the key and the keyway 210. When the torque transmitted by the transmission shaft exceeds the deformation of the elastic body 22, the transmission shaft drives the built-in shaft sleeve 24, the rolling column 26 and the limiting ball 27 to rotate relative to the elastic body 22, and because the shaft head 29 is not in the limiting groove 25, the flange sleeve 28, the shaft head 29 and the flange 21 remain relatively stationary, so that the torque generated by the transmission shaft will be transmitted through the elastic body 22. The deformation of the elastic body 22 is released, so that the elastic body 22 will not drive the flange 21 to rotate, thereby protecting the coupling, preventing breakage, and extending the service life. It can also protect the mechanical equipment at the output end of the coupling. When the torque generated by the transmission shaft decreases, the torque transmitted by the transmission shaft is less than the deformation of the elastic body 22, the rolling column 26 and the limiting ball 27 will fall back into the extrusion groove 23 of the elastic body 22, so that the built-in sleeve 24 drives the elastic body 22 to rotate through the mutual cooperation of the limiting groove 25, the rolling column 26, the limiting ball 27 and the extrusion groove 23. The elastic body 22 drives the flange 21 to rotate, and the torque generated by the transmission shaft is transmitted to the mechanical equipment through the telescopic mechanism 1. The elastic body 22 and the built-in sleeve 24 are covered by the flange sleeve 28, which can increase the sealing inside the coupling, reduce the entry of dust, and thus reduce corrosion, extend the service life, and protect the coupling when the torque increases to prevent breakage. When the load returns to a safe range, the coupling can automatically return to its initial state, further extending the service life, and can also protect the mechanical equipment at the output end of the coupling.

[0025] Example 2: Based on Example 1, Figure 5 To explain, the telescopic mechanism 1 includes an intermediate shaft 11, on which a connecting flange 12 is symmetrically connected through a spline, a limiting flange 13 for limiting the movement of the connecting flange 12 is symmetrically installed on the intermediate shaft 11, and a flange plate 21 is installed on the connecting flange 12. In the present application, a connecting flange 12 is symmetrically connected to the intermediate shaft 11 through a spline, a limiting flange 13 for limiting the movement of the connecting flange 12 is symmetrically installed on the intermediate shaft 11, and a flange plate 21 is installed on the connecting flange 12. The connecting flange 12 and the intermediate shaft 11 are connected through a spline, so that the connecting flange 12 can be telescopically moved on the intermediate shaft 11, and the limiting flanges 13 are installed on both sides of the intermediate shaft 11. When the coupling is extended, the limiting flange 13 can prevent the connecting flange 12 from being separated from the intermediate shaft 11, and then the torque of different distances can be transmitted through the sliding of the connecting flange 12 and the intermediate shaft 11, thereby expanding the scope of use, being suitable for more use scenarios, and improving safety.

[0026] Embodiment 3: Based on Embodiment 2, Figure 2 and Figure 3 For explanation, an intermediate body 3 is installed between the flange 21 and the connecting flange 12, and the intermediate body 3 is made of polyurethane. The present application installs an intermediate body 3 between the flange 21 and the connecting flange 12, and the intermediate body 3 is made of polyurethane. The flange 21, the intermediate body 3 and the connecting flange 12 are connected by fixing bolts through shaft washers and nuts. The intermediate body 3 is arranged between the flange 21 and the connecting flange 12, and the intermediate body 3 is completely fitted with the end faces of the flange 21 and the connecting flange 12. The elastic deformation of the intermediate body 3 can improve the ability of the coupling to withstand axial impact, making the torque transmission more stable. The intermediate body 3 made of polyurethane has good corrosion resistance, which further prolongs the service life.

[0027] Embodiment 4: Based on Embodiment 2, Figure 2 For explanation, a telescopic sleeve 4 is sleeved between the two connecting flanges 12. In the present application, a telescopic sleeve 4 is sleeved between the two connecting flanges 12, and the telescopic mechanism 1 can be sealed by the telescopic sleeve 4. The telescopic sleeve 4 can extend or shorten along with the connecting flange 12, further preventing dust from infecting the coupling, reducing the corrosion of the coupling, improving the sealing performance, and extending the service life.

[0028] Example 5: Based on Example 1, Figure 3For explanation, a sealing gasket 5 is provided between the flange sleeve 28 and the flange plate 21. The present application provides a sealing gasket 5 between the flange sleeve 28 and the flange plate 21, and the sealing gasket 5 can reduce the gap between the flange sleeve 28 and the flange plate 21, and improve the sealing performance of the locking mechanism 1 by using the sealing gasket 5, further improve the sealing performance, prevent the coupling from being corroded, and extend the service life.

[0029] Example 6: Based on Example 1, Figure 2 To illustrate, one end of the rolling column 26 is set to be circular, and the other end of the rolling column 26 is provided with a groove for storing the limiting ball 27. The present application sets one end of the rolling column 26 to be circular, and the other end of the rolling column 26 is provided with a groove for storing the limiting ball 27. The end of the rolling column 26 set to be circular contacts the shaft head 29. The circular shape can reduce the contact area with the shaft head 29. When the rolling column 26 rotates with the built-in sleeve 24, it can reduce wear and tear, thereby extending the service life. By providing a groove for storing the limiting ball 27 at the other end of the rolling column 26, the limiting ball 27 can be further driven to rotate when the rolling column 26 rotates, thereby making the built-in sleeve 24 and the elastic body 23 rotate more smoothly, reducing wear on the elastic body 23, and further extending the service life.

[0030] Example 7: Based on Example 2, Figure 2 For explanation, the intermediate shaft 11 is equipped with a cylindrical pin 6 for positioning with the limiting flange 13. In the present application, by installing a cylindrical pin 6 for positioning with the limiting flange 13 on the intermediate shaft 11, the installer can more quickly install the limiting flange 13 on the intermediate shaft 11 through the cylindrical pin 6, so that the limiting flange 13 can be located on the same central axis as the intermediate shaft 11 after installation, thereby reducing labor intensity and improving installation efficiency.

[0031] Embodiment 8: Based on Embodiment 2, Figure 5 For explanation, the connecting flange 12 is provided with an oil circuit 7, and an oil filling port 8 is provided on the connecting flange 12. In the present application, the connecting flange 12 is provided with an oil circuit 7, and an oil filling port 8 is provided on the connecting flange 12. Grease enters the oil circuit 7 through the oil filling port 8, so that the contact part between the intermediate shaft 11 and the connecting flange 12 is immersed in grease, which plays a lubricating role and prolongs the service life of the coupling.

[0032] Working process:

[0033] When the torque transmitted by the transmission shaft exceeds the deformation of the elastomer 22, the transmission shaft drives the built-in sleeve 24, the rolling column 26 and the limiting ball 27 to rotate relative to the elastomer 22. Since the shaft head 29 is not in the limiting groove 25, the flange sleeve 28, the shaft head 29 and the flange 21 remain relatively still. In this way, the torque generated by the transmission shaft will be released through the deformation of the elastomer 22, so that the elastomer 22 will not drive the flange 21 to rotate, thereby protecting the coupling, preventing breakage, extending the service life, and protecting the mechanical equipment at the output end of the coupling. When the torque generated by the transmission shaft decreases and the torque transmitted by the transmission shaft is less than the deformation of the elastomer 22, the rolling column 26 and the limiting ball 27 will fall back into the extrusion groove 23 of the elastomer 22, and the coupling automatically returns to its initial state to transmit torque.

[0034] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0035] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A telescopic torque limiting coupling, characterized in that: The invention comprises a telescopic mechanism (1), wherein locking mechanisms (2) for connecting a transmission shaft are installed at both ends of the telescopic mechanism (1), wherein the locking mechanism (2) comprises a flange (21), wherein an elastic body (22) is installed in the flange (21), wherein an extrusion groove (23) is provided in the elastic body (22), wherein an internal shaft sleeve (24) is provided in the elastic body (22), wherein a limiting groove (25) is provided in a circumferential array on the internal shaft sleeve (24), wherein a rolling column (26) and a limiting ball (27) for cooperating with the extrusion groove (23) are provided in the limiting groove (25), wherein a flange sleeve (28) is installed on the flange (21), wherein a shaft head (29) for cooperating with the extrusion groove (23) is installed in a circumferential array on the flange sleeve (28), and wherein a key groove (210) is provided on the internal shaft sleeve (24).

2. A telescopic torque limiting coupling according to claim 1, characterized in that: The telescopic mechanism (1) comprises an intermediate shaft (11), a connecting flange (12) is symmetrically connected to the intermediate shaft (11) via a spline, a limiting flange (13) for limiting the movement of the connecting flange (12) is symmetrically mounted on the intermediate shaft (11), and a flange plate (21) is mounted on the connecting flange (12).

3. A telescopic torque limiting coupling according to claim 2, characterized in that: An intermediate body (3) is installed between the flange plate (21) and the connecting flange (12), and the intermediate body (3) is made of polyurethane.

4. A telescopic torque limiting coupling according to claim 2, characterized in that: A telescopic sheath (4) is sleeved between the two connecting flanges (12).

5. A telescopic torque limiting coupling according to claim 1, characterized in that: A sealing gasket (5) is arranged between the flange sleeve (28) and the flange plate (21).

6. A telescopic torque limiting coupling according to claim 1, characterized in that: One end of the rolling column (26) is arranged in a circular shape, and the other end of the rolling column (26) is provided with a groove for storing a limiting ball (27).

7. A telescopic torque limiting coupling according to claim 2, characterized in that: The intermediate shaft (11) is provided with a cylindrical pin (6) for positioning with the limiting flange (13).

8. A telescopic torque limiting coupling according to claim 2, characterized in that: An oil circuit (7) is arranged in the connecting flange (12), and an oil filling port (8) is opened on the connecting flange (12).

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