A connecting structure and a tower

Abstract

The application relates to the technical field of connecting structures, in particular to a connecting structure and a tower drum, a connecting structure comprising a base drum, an embedded drum, a spiral ring, a spring, a driving gear, a transmission assembly, a connecting shaft and a rotating drum, the spiral ring is externally provided with an external thread, and the base drum is internally provided with a rack and an internal thread; one end of the spring is connected to one end of the embedded drum close to the spiral ring, and the other end of the spring is used for slidingly abutting the spiral ring; the embedded drum is used for slidingly embedding into the base drum in the direction from a first area to a second area, one end of the base drum away from the first area is connected with a first stop ring, the thread teeth of the external thread are spirally embedded into the thread grooves of the internal thread, and the spring makes the thread teeth of the external thread abut the groove wall of the thread groove close to the embedded drum. According to the application, the embedded drum is slid to abut the mutually facing surfaces of the two tower drum sections to the mutually facing away surfaces of the two tower drum sections, that is, a nut or a bolt with many turns is not needed to connect the two tower drum sections. Therefore, the connection between the two tower drum sections is facilitated.

Description

Technical Field

[0001] The present application relates to the technical field of connection structures, and in particular to a connection structure and a tower. Background Art

[0002] In production and daily life, we often see a variety of connection structures, such as flange connection, threaded connection, interference fit and spline connection. Each connection structure has its own unique advantages, but also has its own disadvantages. As far as flange connection is concerned, its advantage of achieving connection between components is undoubted.

[0003] Reference Figure 1 For example, in a wind turbine tower, due to its length, the tower needs to be connected as a whole using multiple small tower segments 9 connected by flanges. When flange-connecting tower segments 9, the diameter of the tower segments 9 is relatively large, so multiple bolts 01 and nuts 02 that cooperate with each other must be arranged along the circumference of the tower segments 9 to connect two adjacent tower segments 9. When tightening the bolts 01 or nuts 02, multiple turns are required, which is quite cumbersome. Summary of the Invention

[0004] In order to facilitate the connection between tower sections, the present application provides a connection structure and a tower.

[0005] In the first aspect, the present application provides a connection structure that adopts the following technical solution:

[0006] A connection structure comprises a base tube, an insert tube, and a coil rotatably connected to the insert tube, wherein the outer circumference of the coil is provided with an external thread, the interior of the base tube is provided with a first zone and a second zone distributed along its own axial direction, the inner wall of the base tube is fixedly connected to a rack located in the second zone, the length direction of the rack is the same as the axial direction of the base tube, the inner wall of the base tube is provided with an internal thread located in the first zone, and the width of the thread teeth of the internal thread is smaller than the width of the thread groove of the external thread; a limiting groove is provided on the inner circumference of the coil, and the limiting groove passes through the coil along the axial direction of the coil;

[0007] The cam is connected to the transmission gear of the present invention and is fixed on the transmission gear of the present invention with a first stop ring, and the transmission gear is connected to the transmission gear of the present invention with a first stop ring.

[0008] When the insert slides from the first area to the second area, the driving gear drives the rotating drum to rotate through the transmission assembly, the thread teeth of the external thread are spirally embedded in the thread groove of the internal thread, and the spring undergoes elastic deformation, and the spring causes the thread teeth of the external thread to abut against the groove wall of the thread groove close to the insert.

[0009] By adopting the above technical solution, when connecting two tower sections, holes are drilled in the two tower sections, and the base tube is inserted into the holes provided in the tower sections. When the insert tube is inserted into the base tube from the first area to the second area, the rack engages with the drive gear. By making the internal thread width smaller than the external thread groove width, the internal thread can slide axially within the internal thread groove, so that the drive gear drives the rotating drum to rotate the coil through the transmission assembly, and the external thread teeth are inserted into the internal thread groove, and the spring is compressed. The insert tube is further slid until the surfaces of the first retaining ring and the second retaining ring that are close to each other abut the surfaces of the two tower sections that are separated from each other. In other words, people do not need to rotate the nut or bolt many times to connect the two tower sections. This facilitates the connection between the two tower sections.

[0010] At the same time, the spring force of the coil moves until the outer thread of the outer thread abuts the wall of the inner thread groove near the insert, preventing the insert from sliding directly from the second zone to the first zone, thus achieving self-locking. To remove the insert from the base tube, the coil can be rotated to gradually separate the insert from the base tube. This facilitates the connection between tower sections while also allowing for the disassembly of the base tube and insert.

[0011] Preferably, the transmission assembly includes a first bevel gear, a second bevel gear, a third bevel gear and a fourth bevel gear, the first bevel gear is coaxially fixedly connected to the driving gear, the fourth bevel gear is coaxially fixedly connected to the rotating drum, the second bevel gear is meshed with the first bevel gear, the third bevel gear is coaxially fixedly connected to the second bevel gear, and the third bevel gear is meshed with the fourth bevel gear.

[0012] By adopting the above technical solution, the rotation of the driving gear driven by the rack when the embedded cylinder slides is converted into the rotation of the rotating cylinder, so that the spiral ring is driven to rotate by the sliding of the embedded cylinder.

[0013] Preferably, three racks are provided at equal intervals along the circumference of the base cylinder, and three drive gears, the embedded grooves, the first bevel gears, the second bevel gears and the third bevel gears are provided at equal intervals along the circumference of the embedded cylinder.

[0014] By adopting the above technical solution, the three third bevel gears distributed along the circumference of the base cylinder jointly drive the fourth bevel gear to minimize the deviation of the fourth bevel gear's own axis during rotation, thereby improving the rotation stability of the rotating cylinder and the spiral ring.

[0015] Preferably, a positioning groove is provided on the surface of the insert cylinder close to the coil, and the spring is embedded in the positioning groove.

[0016] By adopting the above technical solution, the spring is limited by the groove wall of the positioning groove, which can avoid the friction between the spring and the coil when the coil rotates, causing the spring to bend and fail.

[0017] Preferably, a plurality of positioning grooves are provided at equal intervals along the circumference of the insert cylinder, the number of the springs is equal to the number of the positioning grooves, and all the springs are sequentially embedded in all the positioning grooves.

[0018] By adopting the above technical solution and providing multiple springs, the coil is forced to slide axially as far as possible until the external thread teeth abut the internal thread groove wall close to the embedded barrel, reducing the probability of the coil shifting. At the same time, the multiple springs jointly support the coil, increasing the pressure between the thread teeth and the groove wall, thereby increasing the friction between the internal and external threads, reducing the probability of the coil loosening, and improving the connection stability between the tower sections.

[0019] Preferably, the thread teeth of the external thread are spirally embedded in the thread groove of the internal thread, and the surface of the thread teeth of the external thread away from the axis of the coil abuts against the bottom of the thread groove of the internal thread.

[0020] By adopting the above technical solution, when the coil rotates, the probability of the coil tilting due to spring vibration is reduced, thereby improving the stability of the coil rotation.

[0021] Preferably, a positioning hole is provided on the surface of the spiral coil facing away from the embedded cylinder.

[0022] By adopting the above technical solution, when people need to remove the insert from the base tube, they can insert a cylindrical rod or a screwdriver into the positioning hole to drive the spiral ring to rotate, thereby driving the insert to slide away from the base tube, thereby realizing the disassembly of the base tube and the insert.

[0023] In the second aspect, the present application provides a tower adopting the following technical solution:

[0024] Preferably, it includes multiple tower segments, each of which is fixedly connected to a flange at both ends along its own axial direction, and the flange is provided with multiple through holes along its own circumference. It also includes the above-mentioned connection structure, the diameter of the through hole is equal to the outer diameter of the base tube, the through hole is used for the base tube to be embedded, and the surfaces of the first retaining ring and the second retaining ring that are close to each other are used to abut the surfaces of the two flanges that are away from each other.

[0025] By adopting the above technical solution, after the base tube is inserted into the through hole provided in the flange, the insert tube slides into the base tube until the surfaces of the first retaining ring and the second retaining ring, which are close to each other, abut against the surfaces of the two flanges, which are away from each other. In other words, people do not need to turn the bolts or nuts many times to connect the two tower sections, thereby facilitating the connection of multiple tower sections. In addition, the outer diameter of the through hole is equal to the diameter of the through hole, thereby improving the stability of the tower section connection.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. Slide the insert until the surfaces of the first retaining ring and the second retaining ring that are close to each other abut against the surfaces of the two tower sections that are away from each other, that is, people do not need to rotate the nuts or bolts many times to connect the two tower sections. This makes it easier to connect the two tower sections.

[0028] 2. Multiple springs enable the threads of the external thread to press against the groove wall of the internal thread groove close to the embedded barrel, thereby increasing the friction between the internal and external threads and improving the connection stability between the tower sections;

[0029] 3. The three second bevel gears and the third bevel gear are driven to rotate by the three driving gears, and the fourth bevel gear is driven by the three third bevel gears to improve the rotation stability of the spiral ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a connection diagram of tower sections in the related art.

[0031] Figure 2 It is an overall schematic diagram of a connection structure of an embodiment of the present application.

[0032] Figure 3 It is a schematic cross-sectional structure diagram of a connection structure in an embodiment of the present application.

[0033] Figure 4 yes Figure 3 Enlarged view of point A in the middle.

[0034] Figure 5 yes Figure 3 Enlarged view of point B in the middle.

[0035] Figure 6 This is a schematic diagram of the connection structure of a tower in an embodiment of the present application.

[0036] Figure 7 yes Figure 6 Enlarged view of point C in the middle.

[0037] Explanation of the accompanying drawings: 1. Base tube; 11. First zone; 12. Second zone; 13. First retaining ring; 14. Rack; 15. Internal thread; 151. Thread groove; 2. Embedded tube; 21. Baffle; 22. Positioning groove; 23. Embedded groove; 3. Coil; 31. Limiting groove; 32. External thread; 321. Threaded tooth; 33. Positioning hole; 4. Connecting shaft; 41. Connecting plate; 42. Second retaining ring; 5. Rotating drum; 51. Limiting strip; 6. Spring; 7. Transmission assembly; 71. First bevel gear; 72. Second bevel gear; 73. Third bevel gear; 74. Fourth bevel gear; 741. Through hole; 8. Drive gear; 9. Tower section; 91. Flange; 911. Through hole; 01. Bolt; 02. Nut. DETAILED DESCRIPTION

[0038] The following is combined with Figure 2-7 This application is described in further detail.

[0039] Reference Figure 2 and Figure 3 The present application discloses a connection structure including a base tube 1. The base tube 1 has a first region 11 and a second region 12 disposed along its axial direction. Three racks 14 located within the second region 12 are fixedly connected to the inner wall of the base tube 1. The length of the racks 14 is aligned with the axial direction of the base tube 1, and the three racks 14 are evenly spaced along the circumference of the base tube 1. The inner wall of the base tube 1 is further provided with an internal thread 15 located in the first region 11. A first retaining ring 13 is fixedly connected to the outer periphery of the end of the base tube 1 away from the first region 11.

[0040] A connection structure also includes an embedded cylinder 2, a spiral coil 3, a connecting shaft 4 and a rotating cylinder 5. The inner circumference of one end of the embedded cylinder 2 is coaxially fixedly connected to a baffle 21. One end of the connecting shaft 4 is located in the embedded cylinder 2 and coaxially fixedly connected to the baffle 21. The other end of the connecting shaft 4 extends out of the embedded cylinder 2, and the outer circumference of the connecting shaft 4 extending out of the embedded cylinder 2 is connected to multiple connecting plates 41 at equal intervals along its own circumferential direction. The surface of the connecting plate 41 facing away from the connecting shaft 4 is fixedly connected to a second retaining ring 42, and the outer diameter of the second retaining ring 42 is equal to the outer diameter of the first retaining ring 13.

[0041] The rotating drum 5 is coaxially sleeved on the outer circumference of the connecting shaft 4, with one end of the rotating drum 5 abutting against the baffle 21, and the other end of the rotating drum 5 extending out of the embedded drum 2. The outer circumference of the rotating drum 5 extending out of the embedded drum 2 is fixedly connected to a limit bar 51, and the length direction of the limit bar 51 is the same as the axial direction of the rotating drum 5. The coil 3 is located between the second retaining ring 42 and the embedded drum 2. The two ends of the coil 3 along its own axial direction are used to abut the second retaining ring 42 and the end face of the embedded drum 2 respectively. A limit groove 31 is provided on the inner circumference of the coil 3. The limit groove 31 passes through the coil 3 along the axial direction of the coil 3. The coil 3 is coaxially slidably sleeved on the outer circumference of the rotating drum 5. The limit bar 51 is slidably embedded in the limit groove 31, so that the coil 3 can slide along the axial direction of the rotating drum 5, and when the rotating drum 5 rotates, the coil 3 is driven to rotate. The outer circumference of the coil 3 is provided with an external thread 32, and the width of the thread teeth 321 of the external thread 32 is smaller than the width of the thread groove 151 of the internal thread 15. This facilitates the sliding of the coil 3 along its own axis after the thread teeth 321 of the external thread 32 are embedded in the thread groove 151 of the internal thread 15. The thread teeth 321 width is the width of the thread teeth 321 along the axial direction of the coil 3, and the thread groove 151 width is the width of the thread groove 151 along the axial direction of the coil 3. After the thread teeth 321 of the external thread 32 are embedded in the thread groove 151 of the internal thread 15, the surface of the thread teeth 321 of the external thread 32 facing away from the axis of the coil 3 abuts the bottom of the thread groove 151 of the internal thread 15, thereby reducing the probability of the coil 3 tilting.

[0042] The surface of the coil 3 facing away from the insert 2 is provided with a plurality of positioning holes 33 at equal intervals along its circumference. These positioning holes 33 are used to insert tools such as a screwdriver or a cylindrical rod. The distance between the positioning holes 33 and the axial direction of the coil 3 is less than the distance between the inner circumference of the second retaining ring 42 and the axial direction of the coil 3, making it easier to insert tools such as a screwdriver or a cylindrical rod. After the screwdriver or cylindrical rod is inserted into the positioning holes 33, the coil 3 can be rotated by controlling the screwdriver or cylindrical rod to rotate about the axis of the coil 3.

[0043] Reference Figure 3 and Figure 4 One connection structure also includes multiple springs 6. The surface of the insert barrel 2 near the coil 3 is provided with a plurality of positioning grooves 22 spaced evenly along its circumference. The number of positioning grooves 22 is equal to the number of springs 6, and each positioning groove 22 houses a spring 6. In this embodiment, there are three springs 6; in other embodiments, the number of springs 6 may be four, five, or the like. One end of the spring 6 is connected to the bottom of the positioning groove 22, and the other end of the spring 6 is configured to slide against the surface of the coil 3 near the insert barrel 2.

[0044] The inner diameter of the second retaining ring 42 is greater than that of the coil 3 , and the spring 6 is provided with a pre-tightening force so that the spring 6 supports the coil 3 and enables the coil 3 to abut against the second retaining ring 42 away from the surface of the insert 2 .

[0045] Reference Figure 3 and Figure 5A connection structure also includes a transmission assembly 7 and three drive gears 8. The transmission assembly 7 includes three first bevel gears 71, three second bevel gears 72, three third bevel gears 73, and a fourth bevel gear 74. The fourth bevel gear 74 is coaxially provided with a through-hole 741 and is coaxially fixedly sleeved on the outer circumference of the rotating drum 5. The insert 2 is provided with three insert grooves 23 at equal intervals along its circumference. The three drive gears 8 are respectively inserted into the three insert grooves 23. The drive gears 8 are used to mesh with the rack 14 and are coaxially fixedly connected to the first bevel gear 71. The second bevel gear 72 is rotatably connected to the insert 2 and meshes with the first bevel gear 71. The third bevel gear 73 is coaxially fixedly connected to the second bevel gear 72 and meshes with the fourth bevel gear 74.

[0046] The principle of the connection structure of the present embodiment is as follows: when connecting two tower sections 9 via the connection structure, a hole is formed at the end of each tower section 9, into which the base tube 1 is inserted, with the end face of the first retaining ring 13 contacting the surface of the tower section 9. Then, by holding the second retaining ring 42, the insert 2 is slidably inserted into the base tube 1 from the first zone 11 to the second zone 12. When the insert 2 slides into the second zone 12 and the coil 3 enters the first zone 11, the drive gear 8 engages with the rack 14. As the insert 2 continues to slide, the drive gear 8 drives the rotating tube to rotate via the first bevel gear 71, the second bevel gear 72, the third bevel gear 73, and the fourth bevel gear 74. As the rotating tube rotates, the retaining bar 51 engages the retaining groove 31, allowing the coil 3 to rotate. This causes the threads 321 of the external thread 32 to spirally engage the thread groove 151 of the internal thread 15 until the end face of the second retaining ring 42 contacts the tower section 9. The spring 6 is provided with a preload force, which allows the thread 321 of the external thread 32 to abut against the groove wall of the internal thread 151 near the insert 2, thereby minimizing the possibility that the insert 2 will slide off the base tube 1 in the direction from the second area 12 to the first area 11. This achieves self-locking, thereby connecting the two tower sections 9. This means that the connection between the two tower sections 9 can be achieved without turning the bolt or nut multiple times, making it easier to connect the tower sections 9.

[0047] The embodiment of the present application also discloses a tower.

[0048] Reference Figure 6 and Figure 7 A tower includes multiple of the above-mentioned connection structures, and also includes multiple tower segments 9. The tower segments 9 are fixedly connected to the inner circumference of both ends of their own axial directions with flanges 91. The end face of the flange 91 is flush with the end face of the tower segment 9. The flange 91 is provided with multiple through holes 911 along its own circumference. The diameter of the through hole 911 is equal to the outer diameter of the base tube 1. The through hole 911 is used for the base tube 1 to be embedded. The number of through holes 911 is equal to the number of the connection structure.

[0049] The implementation principle of a tower in an embodiment of the present application is as follows: when connecting two adjacent tower sections 9, the axes of the two tower sections 9 are aligned, and the flanges 91 at the ends of the tower sections 9 are in contact with each other. After the base tube 1 is inserted into the through hole 911, the first retaining ring 13 abuts the end face of one flange 91, and then the insert tube 2 is inserted into the base tube 1 until the second retaining ring 42 abuts the other flange 91, so that the first retaining ring 13 and the second retaining ring 42 clamp the two flanges 91, thereby connecting the adjacent tower sections 9. The diameter of the through hole 911 is equal to the outer diameter of the base tube 1 to improve the stability of the connection between adjacent tower sections 9.

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

Claims

1. A connection structure, characterized in that: The invention comprises a base tube (1), an insert tube (2) and a coil (3) rotatably connected to the insert tube (2), wherein the outer circumference of the coil (3) is provided with an external thread (32), the interior of the base tube (1) is provided with a first zone (11) and a second zone (12) distributed along its own axial direction, the inner wall of the base tube (1) is fixedly connected with a rack (14) located in the second zone (12), the length direction of the rack (14) is the same as the axial direction of the base tube (1), the inner wall of the base tube (1) is provided with an internal thread (15) located in the first zone (11), and the width of the thread teeth (321) of the internal thread (15) is smaller than the width of the thread groove (151) of the external thread (32); a limiting groove (31) is provided on the inner circumference of the coil (3), and the limiting groove (31) penetrates the coil (3) along the axial direction of the coil (3); It also includes a spring (6), a driving gear (8), a transmission assembly (7), a connecting shaft (4) and a rotating drum (5), wherein the outer periphery of the rotating drum (5) is fixedly connected to a limiting strip (51), the rotating drum (5) is slidably embedded in the inner periphery of the spiral coil (3), and the limiting strip (51) is slidably embedded in the limiting groove (31); the base drum (1) is provided with an embedding groove (23), and the driving gear (8) is rotatably connected to the groove wall of the embedding groove (23); one end of the spring (6) is connected to one end of the embedding drum (2) close to the spiral coil (3), and the other end of the spring (6) is used for sliding against the spiral coil (3) The embedded cylinder (2) is used to slide and embed into the base cylinder (1) in the direction from the first zone (11) to the second zone (12), and the driving gear (8) is used to engage the rack (14); the end of the base cylinder (1) away from the first zone (11) is fixedly connected to the first retaining ring (13), the connecting shaft (4) is coaxially located in the rotating cylinder (5), one end of the connecting shaft (4) is fixedly connected to the embedded cylinder (2), and the other end of the connecting shaft (4) is fixedly connected to the second retaining ring (42), and the surfaces of the first retaining ring (13) and the second retaining ring (42) close to each other are used to abut the end face of the flange (91); When the embedded cylinder (2) slides in the direction from the first zone (11) to the second zone (12), the driving gear (8) drives the rotating cylinder (5) to rotate through the transmission assembly (7), the thread teeth (321) of the external thread (32) are spirally embedded in the thread groove (151) of the internal thread (15), and the spring (6) undergoes elastic deformation, and the spring (6) causes the thread teeth (321) of the external thread (32) to abut against the groove wall of the thread groove (151) close to the embedded cylinder (2).

2. The connection structure according to claim 1, wherein: The transmission assembly (7) comprises a first bevel gear (71), a second bevel gear (72), a third bevel gear (73) and a fourth bevel gear (74), wherein the first bevel gear (71) is coaxially fixedly connected to the driving gear (8), the fourth bevel gear (74) is coaxially fixedly connected to the rotating drum (5), the second bevel gear (72) is meshed with the first bevel gear (71), the third bevel gear (73) is coaxially fixedly connected to the second bevel gear (72), and the third bevel gear (73) is meshed with the fourth bevel gear (74).

3. The connection structure according to claim 2, wherein: Three racks (14) are provided at equal intervals along the circumference of the base cylinder (1), and three drive gears (8), the embedded groove (23), the first bevel gear (71), the second bevel gear (72) and the third bevel gear (73) are also provided at equal intervals along the circumference of the embedded cylinder (2).

4. A connection structure according to claim 2, characterized in that: A positioning groove (22) is provided on the surface of the embedded cylinder (2) close to the spiral coil (3), and the spring (6) is embedded in the positioning groove (22).

5. A connection structure according to claim 4, characterized in that: A plurality of positioning grooves (22) are provided at equal intervals along the circumference of the embedded cylinder (2); the number of the springs (6) is equal to the number of the positioning grooves (22), and all the springs (6) are sequentially embedded in all the positioning grooves (22).

6. A connection structure according to claim 1, characterized in that: The thread teeth (321) of the external thread (32) are spirally embedded in the thread groove (151) of the internal thread (15), and the surface of the thread teeth (321) of the external thread (32) facing away from the axis of the spiral coil (3) abuts against the bottom of the thread groove (151) of the internal thread (15).

7. The connection structure according to claim 1, characterized in that: A positioning hole (33) is provided on the surface of the spiral ring (3) facing away from the embedded cylinder (2).

8. A tower, comprising a plurality of tower sections (9), wherein both ends of the tower sections (9) along their own axial directions are fixedly connected to flanges (91), and the flanges (91) are provided with a plurality of through holes (911) along their own circumference, characterized in that: It also includes a connection structure as described in any one of claims 1 to 7 above, wherein the diameter of the through hole (911) is equal to the outer diameter of the base cylinder (1), the through hole (911) is used for the base cylinder (1) to be embedded, and the surfaces of the first retaining ring (13) and the second retaining ring (42) close to each other are used to abut the surfaces of the two flanges (91) facing away from each other.

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