Novel flange shaft connecting structure of planetary reducer

Abstract

The utility model discloses a novel flange shaft connecting structure of a planetary reducer, which belongs to the technical field of flange shaft connecting structures and comprises two flange connecting ends arranged oppositely, each flange connecting end comprises a flange plate and a connecting cylinder fixedly arranged on the outer end face of the flange plate, the inner end face of the flange plate is fixedly provided with outwards-protruding curved strips and bent grooves which are arranged in a circumferential array mode, the section of each outwards-protruding curved strip is a trapezoid section, and the size of each outwards-protruding curved strip is matched with the size of each bent groove. Therefore, most torque in the transmission process can be shared through the mutual clamping effect of the convex curved strips and the bent grooves which are arranged on the flange plates, the shear-resistant connecting pieces which play a role in bolt connection mainly provide axial constraining force to prevent the flange plates from being separated from one another, the stress condition of bolts in existing flange connection is optimized, and the service life of the flange plates is prolonged. The strength and the precision of the threads on the shear connector are reduced, and the possibility of loosening of the threads in the transmission process can be reduced.

Description

Technical Field

[0001] The utility model relates to a flange shaft connection structure, in particular to a novel planetary reducer flange shaft connection structure, belonging to the technical field of flange shaft connection structures. Background Art

[0002] Flange, also known as flange flange or flange. Flange is a part that connects shafts to each other and is used to connect pipe ends. It is also used as a flange on the inlet and outlet of equipment to connect two devices, such as reducer flange. Flange connection or flange joint refers to a detachable connection in which flange, gasket and bolts are connected to each other as a combined sealing structure. Reducer flange is used to connect the motor to the reducer, and the reducer to other equipment, including the connection between the planetary reducer and other equipment.

[0003] The existing flange connection usually only relies on bolts to achieve the connection between flanges, and relies on the bolts to withstand shear force and then transmit torque. This connection method has high requirements on the accuracy and strength of the bolts and their threads. In addition, during the transmission process, the bolts are prone to loosening due to the complex load form, causing the connection to be on the verge of failure. Therefore, a new type of planetary reducer flange shaft connection structure is proposed to address the above problems. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a novel flange-shaft connection structure for a planetary reducer, which can share most of the torque by the combination of the convex curved strips and the curved grooves arranged on the flange plate, while the shear-resistant connection parts that perform the bolt connection function mainly provide axial restraint force, thereby optimizing the stress conditions of the bolts in the flange connection, and solving the technical problem in the prior art that the bolts have high strength and precision requirements and are easy to loosen due to sharing the main load.

[0005] In order to solve the above problems, the following technical solutions are provided:

[0006] A novel planetary reducer flange shaft connection structure is designed, comprising two flange connection ends arranged opposite to each other, the flange connection end heads comprising a flange plate and a connecting cylinder fixedly arranged on the outer end face of the flange plate, the two flange plates are fixedly connected by a shear-resistant connecting piece, the reducer shaft is fixedly connected to the connecting cylinder of the flange connection end head on one side, and the transmission shaft is fixedly connected to the connecting cylinder of the flange connection end head on the other side, four convex curved strips arranged in a circular array are fixedly arranged on the inner end face of the flange plate, four curved grooves arranged in a circular array are opened on the inner end face of the flange plate, the cross-section of the convex curved strip is a trapezoidal cross-section and the size of the convex curved strip is consistent with the size of the curved groove.

[0007] The above-mentioned structural form can share most of the torque in the transmission process by the mutual engagement of the convex curved strip and the curved groove arranged on the flange, while the shear-resistant connector that performs the bolt connection function mainly provides axial restraint to prevent the flanges from separating from each other. It optimizes the stress conditions of the bolts in the existing flange connection, reduces the strength and precision of the threads on the shear-resistant connector, and can also reduce the possibility of loosening during the transmission process. In particular, the curved groove with a trapezoidal cross-section can also guide the convex curved strip of the trapezoidal cross-section during the connection process, thereby facilitating the alignment work between the two flanges.

[0008] Furthermore, four flange connection holes arranged in a circular array are provided on each of the two flanges, and four hexagonal grooves arranged in a circular array are provided on the outer end surface of one of the flanges.

[0009] The above structural form provides the necessary basic conditions for the connection function of the shear connector.

[0010] Furthermore, the shear connector includes a shear bolt and an end threaded barrel, the shear bolt is threaded only at the end and its bolt rod diameter is equal to the aperture of the flange connection hole, and the size of the hexagonal cap at the front end of the shear bolt is consistent with the size of the hexagonal groove.

[0011] In the above structure, since the shear bolt is consistent with the flange connection hole in size, it can play a certain role in assisting alignment. At the same time, the hexagonal groove can restrain the hexagonal cap at the front end of the shear bolt to prevent it from rotating during the process of tightening the threaded barrel at the end.

[0012] Furthermore, the end threaded barrel includes a hexagonal prism section and a cylindrical section, the hexagonal prism section is provided with an internal thread matching the thread size of the end of the shear bolt, and the inner diameter of the cylindrical section is larger than the bolt rod diameter of the shear bolt.

[0013] The above-mentioned structural form is connected with the end of the shear bolt through the internal thread of the hexagonal prism section, and the cylindrical section can resist the flange to achieve the clamping effect of the two flanges. This form can avoid the exposure of the thread to the outside and protect the thread.

[0014] Furthermore, two symmetrically arranged anti-slip convex strips are fixedly provided on the reducer shaft, a through threaded through hole is opened on the reducer shaft, a limited mounting groove is opened on the connecting cylinder connected to the reducer shaft, and a leveling cylinder is fixedly provided on the connecting cylinder, the reducer shaft is slidably set in the connecting cylinder, and the reducer shaft and the connecting cylinder are fixedly connected by fixing bolts and matching nuts.

[0015] The above-mentioned structural form can restrain the reducer shaft from rotating in the connecting tube through the clamping action between the anti-slip convex strip and the limiting installation groove, thereby playing a role in transmitting torque, while the fixing bolt can prevent the reducer shaft from slipping out of the connecting tube.

[0016] Furthermore, the structure of the transmission shaft and the connection method between the transmission shaft and the connecting cylinder are consistent with the reducer shaft.

[0017] The above structural form can realize the fixed connection between the transmission shaft and the connecting cylinder.

[0018] Furthermore, a gasket groove is provided at the edge of the flange, and a sealed gasket is sleeved in the gasket groove.

[0019] The above-mentioned structural form can seal and block the connection gaps between the flanges with the provided sealing gasket, thereby protecting the interfaces of the flanges.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] In the utility model, most of the torque in the transmission process is shared by the mutual clamping action of the convex curved strip and the curved groove arranged on the flange, and the shear-resistant connector that performs the bolt connection function mainly provides axial restraint force to prevent the flanges from separating from each other, thereby optimizing the stress conditions of the bolts in the existing flange connection, reducing the strength and accuracy of the threads on the shear-resistant connector, and also reducing the possibility of loosening during the transmission process. In particular, the curved groove with a trapezoidal cross-section can also guide the convex curved strip of the trapezoidal cross-section during the connection process, thereby facilitating the alignment work between the two flanges. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0024] Figure 2 This is a schematic diagram of the flange connection end structure of the utility model;

[0025] Figure 3 This is a schematic diagram of the convex curved strip structure of the utility model;

[0026] Figure 4 This is a schematic diagram of the structure of the shear connector of the utility model;

[0027] Figure 5 It is a partial structural schematic diagram of the utility model.

[0028] In the figure: 1. flange connection end; 11. flange plate; 12. connecting tube; 121. limit installation groove; 122. leveling tube; 13. convex curved strip; 14. curved groove; 15. flange connection hole; 16. hexagonal groove; 17. sealed gasket; 171. gasket groove; 21. reducer shaft; 22. transmission shaft; 201. anti-skid convex strip; 202. threaded through hole; 3. shear-resistant connector; 31. shear-resistant bolt; 32. end threaded tube; 321. hexagonal prism section; 322. cylinder section; 323. internal thread; 41. fixing bolt; 42. matching nut. DETAILED DESCRIPTION

[0029] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0030] like Figure 1 - Figure 2 As shown, a novel planetary reducer flange shaft connection structure provided in this embodiment includes two flange connection ends 1 arranged opposite to each other, the flange connection end 1 includes a flange plate 11 and a connection tube 12 fixedly arranged on the outer end surface of the flange plate 11, and the two flange plates 11 are fixedly connected by a shear connector 3. A reducer shaft 21 is fixedly connected to the connection tube 12 of the flange connection end 1 on one side, and a transmission shaft 22 is fixedly connected to the connection tube 12 of the flange connection end 1 on the other side. Four circumferential arrays are fixedly arranged on the inner end surface of the flange plate 11. The outer convex curved strip 13 is arranged, and the inner end surface of the flange 11 is provided with four curved grooves 14 arranged in a circular array. The outer convex curved strip 13 and the curved grooves 14 arranged on the flange 11 can share most of the torque in the transmission process through the mutual engagement, and the shear connector 3 with the bolt connection function mainly provides axial restraint force to prevent the flanges 11 from separating from each other, which optimizes the stress condition of the bolts in the existing flange connection, reduces the strength and accuracy of the threads on the shear connector 3, and can also reduce the possibility of its loosening during transmission.

[0031] like Figure 3 As shown, the cross-section of the convex curved strip 13 is a trapezoidal cross-section and the size of the convex curved strip 13 is consistent with the size of the curved groove 14. The curved groove 14 with a trapezoidal cross-section can guide the convex curved strip 13 with a trapezoidal cross-section during the connection process, thereby facilitating the alignment work between the two flanges 11.

[0032] like Figure 1 - Figure 2 As shown, the two flanges 11 are each provided with four flange connection holes 15 arranged in a circumferential array, and the outer end surface of one of the flanges 11 is provided with four hexagonal grooves 16 arranged in a circumferential array. The above-mentioned structural form provides the necessary basic conditions for the connection function of the shear-resistant connector 3.

[0033] like Figure 4 As shown, the shear connector 3 includes a shear bolt 31 and an end threaded barrel 32. The shear bolt 31 is threaded only at the end and its bolt rod diameter is equal to the aperture of the flange connection hole 15. The size of the hexagonal cap at the front end of the shear bolt 31 is consistent with the size of the hexagonal groove 16. In the above structural form, since the size of the shear bolt 31 is consistent with that of the flange connection hole 15, it can play a certain alignment auxiliary role. At the same time, the hexagonal groove 16 can constrain the hexagonal cap at the front end of the shear bolt 31 to prevent it from being tightened during the process of tightening the end threaded barrel 32. During the rotation, the end threaded barrel 32 includes a hexagonal prism section 321 and a cylindrical section 322. The hexagonal prism section 321 is provided with an internal thread 323 that matches the thread size of the end of the shear bolt 31. The inner diameter of the cylindrical section 322 is larger than the bolt rod diameter of the shear bolt 31. The internal thread 323 of the hexagonal prism section 321 is threadedly connected to the end of the shear bolt 31. At the same time, the cylindrical section 322 can resist the flange 11 to achieve a clamping effect on the two flanges 11. This form can prevent the thread from being exposed to the outside and protect the thread.

[0034] like Figure 5 As shown, two symmetrically arranged anti-skid ridges 201 are fixedly provided on the reducer shaft 21, a through threaded through hole 202 is opened on the reducer shaft 21, a limited mounting groove 121 is opened on the connecting cylinder 12 connected to the reducer shaft 21, and a leveling cylinder 122 is fixedly provided on the connecting cylinder 12, the reducer shaft 21 is slidably set in the connecting cylinder 12, and the reducer shaft 21 and the connecting cylinder 12 are fixedly connected by fixing bolts 41 and matching nuts 42. The above-mentioned structural form can restrain the reducer shaft 21 from rotating in the connecting cylinder 12 through the clamping action between the anti-skid ridges 201 and the limited mounting grooves 121, thereby playing a role in transmitting torque, and the fixing bolts 41 can prevent the reducer shaft 21 from slipping out of the connecting cylinder 12. In particular, the structural form of the transmission shaft 22 and the connection method with the connecting cylinder 12 are consistent with the reducer shaft 21.

[0035] like Figure 2 As shown, a gasket groove 171 is provided at the edge of the flange 11, and a sealed gasket 17 is sleeved in the gasket groove 171. The above-mentioned structural form can seal the connection gap between the flanges 11 with the provided sealed gasket 17, thereby protecting the interface of the flange 11.

[0036] The use principle and use process of the utility model are as follows: two flange connection ends 1 are overlapped oppositely, so that the convex curved strip 13 on one of the flange plates 11 is inserted into the curved groove 14 on the other flange plate 11, until the two flange plates 11 fit each other, and the two flange plates 11 are connected to each other using a shear connector 3. At this time, the convex curved strip 13 on the flange plate 11 and the curved groove 14 are mutually engaged, sharing most of the torque in the transmission process, and the shear connector 3 that serves as a bolt connection function mainly provides axial restraint force to prevent the flange plates 11 from separating from each other, which optimizes the stress condition of the bolts in the existing flange connection, reduces the strength and precision of the threads on the shear connector 3, and can also reduce the possibility of loosening during the transmission process.

[0037] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0038] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0039] The present invention is described above in conjunction with specific implementation methods, but it should be clear to those skilled in the art that these descriptions are exemplary and are not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on the spirit and principles of the present invention, and these modifications and variations are also within the scope of the present invention.

Claims

1. A novel planetary reducer flange shaft connection structure, comprising two flange connection ends (1) arranged opposite to each other, characterized in that: The flange connection end head (1) comprises a flange (11) and a connection tube (12) fixedly arranged on the outer end surface of the flange (11); the two flanges (11) are fixedly connected via a shear-resistant connection piece (3); a reducer shaft (21) is fixedly connected to the connection tube (12) of the flange connection end head (1) on one side; a transmission shaft (22) is fixedly connected to the connection tube (12) of the flange connection end head (1) on the other side; four convex curved strips (13) arranged in a circumferential array are fixedly arranged on the inner end surface of the flange (11); four curved grooves (14) arranged in a circumferential array are opened on the inner end surface of the flange (11); the cross section of the convex curved strip (13) is a trapezoidal cross section and the size of the convex curved strip (13) matches the size of the curved groove (14).

2. The novel planetary reducer flange shaft connection structure according to claim 1 is characterized in that: Four flange connection holes (15) arranged in a circumferential array are provided on each of the two flanges (11), and four hexagonal grooves (16) arranged in a circumferential array are provided on the outer end surface of one of the flanges (11).

3. The novel planetary reducer flange shaft connection structure according to claim 2 is characterized in that: The shear-resistant connector (3) comprises a shear-resistant bolt (31) and an end threaded barrel (32). The shear-resistant bolt (31) is threaded only at the end and has a bolt rod diameter equal to the hole diameter of the flange connection hole (15). The size of the hexagonal cap at the front end of the shear-resistant bolt (31) is consistent with the size of the hexagonal groove (16).

4. The novel planetary reducer flange shaft connection structure according to claim 3 is characterized in that: The end threaded barrel (32) comprises a hexagonal prism section (321) and a cylindrical section (322); the hexagonal prism section (321) is provided with an internal thread (323) matching the thread size of the end of the shear bolt (31); the inner diameter of the cylindrical section (322) is larger than the bolt rod diameter of the shear bolt (31).

5. The novel planetary reducer flange shaft connection structure according to claim 1 is characterized in that: The reducer shaft (21) is fixedly provided with two symmetrically arranged anti-skid convex strips (201), the reducer shaft (21) is provided with a through threaded through hole (202), a connecting cylinder (12) connected to the reducer shaft (21) is provided with a limited position installation groove (121), and a leveling cylinder (122) is fixedly provided on the connecting cylinder (12), the reducer shaft (21) is slidably arranged in the connecting cylinder (12), and the reducer shaft (21) and the connecting cylinder (12) are fixedly connected by a fixing bolt (41) and a matching nut (42).

6. The novel planetary reducer flange shaft connection structure according to claim 5 is characterized in that: The structure of the transmission shaft (22) and the connection method between the transmission shaft (22) and the connecting cylinder (12) are consistent with the reducer shaft (21).

7. The novel planetary reducer flange shaft connection structure according to claim 1 is characterized in that: A gasket groove (171) is provided at the edge of the flange (11), and a sealed gasket (17) is sleeved in the gasket groove (171).

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