Transmission device for reversing, phase shifter and base station antenna

Abstract

The utility model relates to a transmission device for reversing, a phase shifter and a base station antenna, and the transmission device for reversing comprises a driving shaft which is configured to provide a driving force for the transmission device; the first arc-shaped gear is connected with the driving shaft; the second arc-shaped gear is in meshed connection with the first arc-shaped gear; and the first driven shaft is connected with the second arc-shaped gear. By means of the mode, the two arc-shaped gears which are in transmission with each other of the transmission device can be meshed within a large angle range, so that the structure of the transmission device can be flattened, and the height of the transmission device can be reduced. Therefore, the space volume occupied by the transmission device provided by the utility model is reduced.

Description

Technical Field

[0001] The utility model relates to the field of machinery, and in particular to a transmission device for switching, a phase shifter and a base station antenna. Background Art

[0002] In a transmission system, in order to save space or balance the distribution of force, spatial reversing is usually achieved through a reversing transmission mechanism.

[0003] The existing commutation forms mainly adopt two forms: worm gear or bevel gear pair. The worm gear occupies a large space in height, which is not conducive to the flattening of the structure; and the bevel gear must have a large end and a small end. The existence of the large end is not conducive to reducing the height space, thereby not being conducive to reducing the volume of the transmission device.

[0004] In short, the common worm gear occupies a large space in height, which is not conducive to the flattening of the structure, and the existence of the large end of the bevel gear is not conducive to reducing the height space. In addition, the common worm gear, bevel gear pair and cylindrical cam are mainly used for the reversing of 90° staggered axes, and cannot achieve reversing at other angles. Utility Model Content

[0005] Based on the understanding of the prior art, the inventor of the utility model innovatively uses the meshing of arc gears to flatten the structure of the transmission device, thereby reducing the space volume occupied by the transmission device and achieving a larger angle range of reversing. In other words, the utility model proposes a new reversing solution, which adopts the form of meshing of arc gears and arc gears, so that the formed transmission device occupies a small space in height and is conducive to structural flattening.

[0006] Specifically, the utility model proposes a transmission device for reversing, the transmission device comprising:

[0007] a driving shaft configured to provide a driving force to the transmission device;

[0008] A first arc gear, wherein the first arc gear is connected to the driving shaft;

[0009] a second arc gear, the second arc gear being meshed and connected with the first arc gear; and

[0010] A first driven shaft is connected to the second arc gear.

[0011] In this way, with the help of the two mutually transmitting arc gears of the transmission device proposed by the utility model, meshing can be achieved within a larger angle range, so that the structure of the transmission device according to the utility model can be flattened and the height of the transmission device according to the utility model can be reduced, thereby reducing the space volume occupied by the transmission device according to the utility model.

[0012] In one embodiment of the utility model, the longitudinal axis of the driving shaft intersects with the longitudinal axis of the first driven shaft. Preferably, in one embodiment of the utility model, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft is between 60 degrees and 150 degrees. More preferably, in one embodiment of the utility model, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other or at 60 degrees. In this way, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft can be adjusted as needed, and transmission can also be performed better.

[0013] In one embodiment of the present invention, the first arc gear or the second arc gear is configured as a hemispherical gear. In this way, the hemispherical gear can be used to achieve meshing in a more optimized manner, which can reduce manufacturing costs and achieve better transmission.

[0014] In one embodiment of the present invention, the transmission device further includes: a third arc gear, the third arc gear is meshed and connected with the first arc gear; and a second driven shaft, the second driven shaft is connected with the third arc gear, wherein the longitudinal axis of the second driven shaft intersects or coincides with the longitudinal axis of the driving shaft. In this way, the third arc gear connected to the second driven shaft can also mesh with the first arc gear, so that one driving shaft can drive two driven shafts to rotate, and of course, it can also drive more driven shafts to rotate, thereby making the structure of the transmission device according to the present invention flat and reducing the height of the transmission device according to the present invention, thereby reducing the space volume occupied by the transmission device according to the present invention.

[0015] In one embodiment of the present invention, the third arc gear is constructed as a hemispherical gear. In this way, the hemispherical gear can be used more optimally to achieve meshing, which can reduce manufacturing costs and achieve better transmission.

[0016] In one embodiment of the present invention, the meshing mode of the second arc gear and the first arc gear is involute meshing. Preferably, in one embodiment of the present invention, the involute meshing includes involute meshing with equal modules. More preferably, in one embodiment of the present invention, the number of teeth of the large end of the first arc gear or the large end of the second arc gear is constructed to be 18 and the module is constructed to be 0.6; and / or the top of the first arc gear and / or the second arc gear has a flat area. In this way, the problem of loose meshing at the top can be solved, and better meshing can be achieved in other parts.

[0017] Preferably, in one embodiment of the present utility model, the transmission device further comprises:

[0018] A fixing device is configured to fix the first arc-shaped gear relative to the second arc-shaped gear.

[0019] In addition, the utility model also proposes a phase shifter, which includes the transmission device according to the above.

[0020] In addition, the utility model also proposes a base station antenna, which includes the transmission device according to the above or the phase shifter according to the above.

[0021] To sum up, with the help of the two mutually transmitting arc gears of the transmission device proposed in the utility model, meshing can be achieved within a larger angle range, so that the structure of the transmission device according to the utility model can be flattened and the height of the transmission device according to the utility model can be reduced, thereby reducing the space volume occupied by the transmission device according to the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The embodiments are shown and explained with reference to the accompanying drawings. These drawings are used to explain the basic principles, and only the aspects necessary for understanding the basic principles are shown. These drawings are not to scale. In the drawings, the same reference numerals represent similar features.

[0023] Figure 1 A schematic structural diagram of a transmission device 100 disclosed according to an embodiment of the utility model is shown;

[0024] Figure 2A A schematic diagram of the three-dimensional structure of a first arc gear 210 and a second arc gear 220 in a meshing state according to another embodiment of the utility model is shown;

[0025] Figure 2BFIG. 2 shows a side view of a first arc gear 210 and a second arc gear 220 in a meshing state according to another embodiment of the present utility model;

[0026] Figure 2C FIG. 2 shows a top view of a first arc gear 210 and a second arc gear 220 in a meshing state according to another embodiment of the present invention;

[0027] Figure 3A FIG. 4 is a schematic diagram showing a three-dimensional structure of a first arc gear 310 and a second arc gear 320 in a meshing state according to another embodiment of the present utility model;

[0028] Figure 3B A side view showing a first arc gear 310 and a second arc gear 320 in a meshing state according to another embodiment of the present utility model; and

[0029] Figure 3C FIG. 4 is a top view of a first arc gear 310 and a second arc gear 320 in a meshing state according to yet another embodiment of the present invention.

[0030] Other features, characteristics, advantages and benefits of the present invention will become more apparent from the following detailed description in conjunction with the accompanying drawings. DETAILED DESCRIPTION

[0031] In the following specific description of the preferred embodiments, reference will be made to the attached drawings that constitute a part of the present invention. The attached drawings show, by way of example, specific embodiments that can implement the present invention. The illustrative embodiments are not intended to be exhaustive of all embodiments according to the present invention. It will be appreciated that other embodiments may be utilized, and structural or logical modifications may be made without departing from the scope of the present invention. Therefore, the following specific description is not restrictive, and the scope of the present invention is defined by the attached claims.

[0032] Based on the understanding of the prior art, the inventor of the utility model innovatively uses the meshing of arc gears and arc gears to flatten the structure of the transmission device, thereby reducing the space volume occupied by the transmission device and achieving a larger angle range of reversing. In other words, the utility model proposes a new reversing solution, which adopts the form of arc gears and arc gears meshing, so that the formed transmission device occupies a small space in height and is conducive to structural flattening. In other words, the technical solution disclosed in the utility model adopts the form of arc gears and arc gears meshing, which can achieve reversing within a larger angle range and is conducive to structural flattening. In this technical solution, two arc gears are meshed, the gear teeth are distributed on the spherical surface, the angle between the axes of the meshing arc gears can be adjusted, the tooth profile module along the spherical direction changes according to a certain rule, the meshing form of the arc gears on the plane passing through the spherical center line and perpendicular to the plane composed of the two longitudinal axes is involute meshing, and the output torque value is related to the angle between the two longitudinal axes.

[0033] Figure 1 FIG. 1 shows a schematic structural diagram of a transmission device 100 disclosed according to an embodiment of the present utility model. Figure 1 It can be seen that the transmission device 100 according to the present invention uses two arc gears 110 and 120, each arc gear having a Figure 1 The gear is constructed as a hemispherical gear, the top of which is constructed to have a flat area, and then has teeth with gradually increasing spacing from the top to the other end of the sphere. The angle of the longitudinal lines of the two arc-shaped gears can be meshed in a large range, thereby providing greater freedom for the meshing of the transmission device. Although only two hemispherical gears are shown here, those skilled in the art should understand that one driving gear and one driven gear are merely exemplary and not restrictive. Of course, one driving gear can drive two or more driven gears, as long as the spatial position can be set and the driven gears do not interfere with each other.

[0034] Figure 2A FIG. 2 shows a three-dimensional structural diagram of a first arc gear 210 and a second arc gear 220 in a meshing state according to another embodiment of the present utility model. Figure 2AAs shown, the transmission device 200 for reversing disclosed in the present invention at least includes the components described below. First, in order to input power, the transmission device 200 for reversing needs to be provided with a driving shaft (not shown in the figure, which can be, for example, the rotating shaft of the first arc gear 210), and the driving shaft is constructed to provide driving force to the transmission device 200; secondly, the transmission device 200 for reversing needs to include a first arc gear 210 for the purpose of transmission, and the first arc gear 210 is mechanically connected to the driving shaft (here, the mechanical connection can be manufactured in an integral manner, or can be connected later by fasteners or a shape-matching mechanical structure); at the same time, also for the purpose of transmission, the transmission device 200 for reversing needs to include a second arc gear 220, and the second arc gear 220 is meshed and connected with the first arc gear 210 to achieve the purpose of transmission; further, in order to achieve the purpose of reversing, the transmission device 200 for reversing needs to include a first driven shaft (not shown in the figure, which can be, for example, the rotating shaft of the second arc gear), and the first driven shaft is connected to the second arc gear 220. Here, the driving shaft and the first driven shaft do not overlap, but intersect, thereby achieving the purpose of reversing, that is, achieving the purpose of reversing by means of the driving shaft to drive the first driven shaft that intersects with the driving shaft in a reversing manner. Here, those skilled in the art should understand that the intersection, for example, includes an angle between 30 degrees and 160 degrees. In this way, the two mutually transmitting arc gears of the transmission device 200 proposed by the utility model can be meshed within a larger angle range, so that the structure of the transmission device 200 according to the utility model can be flattened and the height of the transmission device 200 according to the utility model can be reduced, thereby reducing the space volume occupied by the transmission device 200 according to the utility model.

[0035] Here, the longitudinal axis of the driving shaft intersects with the longitudinal axis of the first driven shaft. Preferably, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft is between 60 and 150 degrees. More preferably, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other or at 60 degrees. Figure 2AIn the embodiment shown, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other. In this way, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft can be adjusted as needed, and the transmission can be performed better. Here, those skilled in the art should understand that the angle range included in being substantially perpendicular to each other is, for example, 85 degrees to 95 degrees, preferably between 89 degrees and 91 degrees, and further preferably 90 degrees with a fluctuation of about 0.2 degrees, and most preferably exactly vertical, that is, 90 degrees. With such a configuration, the height of the transmission device 200 according to the utility model can be reduced, so that the structure of the transmission device 200 can be flattened; in addition, the transmission can be achieved by means of the meshing between arc gears (such as the first arc gear 210 and the second arc gear 220), which can also make the transmission smooth and improve the efficiency and stability of the transmission. In this way, by means of the mutual meshing of the two mutually transmitting arc gears of the transmission device 200 proposed by the utility model, the structure of the transmission device 200 according to the utility model can be flattened, thereby reducing the height of the transmission device 200 according to the utility model, and further reducing the space volume occupied by the transmission device 200 according to the utility model.

[0036] exist Figure 2A , Figure 2B as well as Figure 2C In the transmission device 200 with 90-degree reversal shown, the tooth profile of the large end of the hemispherical gear is a standard involute tooth profile with 18 teeth and a module of 0.6, and the meshing position module is (2cos((180-β) / 2)*Ra) / (2+z), where β is the angle between the axes, Ra is the radius of the tooth top circle, and z is the number of teeth. At this time, the transmission device with 90-degree reversal occupies a height space of about 14mm, which is conducive to the flattening of the structure. When applied, the reversing mode between adjustable angles can be selected according to actual needs.

[0037] In addition, from Figure 2A It can be seen that the first arc gear 210 or the second arc gear 220 is constructed as a hemispherical gear. In this way, the hemispherical gear can be used more optimally to achieve meshing, which can reduce manufacturing costs and achieve better transmission.

[0038] In addition, those skilled in the art should understand that the rotation of two driven shafts after the switching of one driving shaft here is only exemplary and not restrictive. When necessary, it is also possible to realize that one driving shaft drives the rotation of three or more driven shafts after the switching, and so on, which will not be repeated here. In other words, optionally, in order to realize the driving of multiple driven shafts by one driving shaft, another driven gear can be additionally provided according to the transmission device 200 of the utility model, that is, the transmission device 200 according to the utility model can also include a third arc gear (not shown in the figure), the third arc gear and the first arc gear 210 are meshed and connected; and a second driven shaft (not shown in the figure, which is, for example, the rotating shaft of the third arc gear), the second driven shaft and the third arc gear are connected, wherein the longitudinal axis of the second driven shaft intersects or coincides with the longitudinal axis of the driving shaft. In this way, the third arc gear connected to the second driven shaft can also mesh with the first arc gear 210, so that one driving shaft can drive two driven shafts to rotate, and of course, it can also drive more driven shafts to rotate, thereby making the structure of the transmission device 200 according to the utility model flat and reducing the height of the transmission device 200 according to the utility model, thereby reducing the space volume occupied by the transmission device 200 according to the utility model. At this time, the third arc gear is constructed as a hemispherical gear. In this way, the hemispherical gear can be used to achieve meshing in a more optimized manner, which can reduce the manufacturing cost and achieve better transmission.

[0039] According to the utility model Figure 2A In the illustrated embodiment, the meshing mode of the second arc gear 220 and the first arc gear 210 is involute meshing. Preferably, the involute meshing includes involute meshing with equal modules, that is, the two arc gears can be the same in shape, that is, the same size, and the meshing positions are also the same distance from their respective top ends. More preferably, the number of teeth of the large end of the first arc gear 210 or the large end of the second arc gear 220 is constructed to be 18 and the module is constructed to be 0.6; and / or the top of the first arc gear 210 and / or the second arc gear 220 has a flat area. In this way, the problem of loose meshing at the top can be solved, and better meshing can be achieved in other parts.

[0040] Preferably, in an embodiment of the present invention, the transmission device 200 further includes a fixing device (not shown in the figure), and the fixing device is configured to fix the first arc gear 210 relative to the second arc gear 220 .

[0041] Figure 2BFIG. 2 shows a side view of a first arc gear 210 and a second arc gear 220 in a meshing state according to another embodiment of the present invention. Figure 2C FIG. 2 shows a top view of a first arc gear 210 and a second arc gear 220 in a meshing state according to another embodiment of the present invention. Figure 2B and Figure 2C In the illustrated embodiment, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other, that is, Figure 2B The plane where the large end of the first hemispherical gear 210 is located and the plane where the large end of the second hemispherical gear 220 is located are substantially perpendicular to each other. In this way, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft can be adjusted to be perpendicular to each other as required, and the transmission can be performed better. Here, those skilled in the art should understand that the angle range included in substantially perpendicular to each other is, for example, 85 degrees to 95 degrees, preferably between 89 degrees and 91 degrees, and further preferably 90 degrees with a fluctuation of about 0.2 degrees, and most preferably exactly perpendicular, that is, 90 degrees.

[0042] Figure 3A FIG. 2 shows a three-dimensional structural diagram of a first arc gear 310 and a second arc gear 320 in a meshing state according to another embodiment of the present utility model. Figure 3AAs shown, the transmission device 300 for reversing disclosed in the present invention at least includes the components described below. First, in order to input power, the transmission device 300 for reversing needs to be provided with a driving shaft (not shown in the figure, which can be, for example, the rotating shaft of the first arc gear), and the driving shaft is constructed to provide driving force to the transmission device 300; secondly, the transmission device 300 for reversing needs to include a first arc gear 310 for the purpose of transmission, and the first arc gear 310 is mechanically connected to the driving shaft (here, the mechanical connection can be manufactured in an integral manner, or can be connected later by fasteners or a shape-matching mechanical structure); at the same time, also for the purpose of transmission, the transmission device 300 for reversing needs to include a second arc gear 320, and the second arc gear 320 is meshed and connected with the first arc gear 310 to achieve the purpose of transmission; further, in order to achieve the purpose of reversing, the transmission device 300 for reversing needs to include a first driven shaft (not shown in the figure, which can be, for example, the rotating shaft of the second arc gear), and the first driven shaft is connected to the second arc gear 320. Here, the driving shaft and the first driven shaft do not overlap, but intersect, thereby achieving the purpose of reversing, that is, achieving the purpose of reversing by means of the driving shaft to drive the first driven shaft that intersects with the driving shaft in a reversing manner. Here, those skilled in the art should understand that the intersection, for example, includes an angle between 30 degrees and 160 degrees. In this way, the two mutually transmitting arc gears of the transmission device 300 proposed by the utility model can be meshed within a larger angle range, so that the structure of the transmission device 300 according to the utility model can be flattened and the height of the transmission device 300 according to the utility model can be reduced, thereby reducing the space volume occupied by the transmission device 300 according to the utility model.

[0043] Here, the longitudinal axis of the driving shaft intersects with the longitudinal axis of the first driven shaft. Preferably, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft is between 60 and 150 degrees. More preferably, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other or at 60 degrees. Figure 3AIn the embodiment shown, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other. In this way, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft can be adjusted as needed, and the transmission can be performed better. Here, those skilled in the art should understand that the angle range included in being substantially perpendicular to each other is, for example, 85 degrees to 95 degrees, preferably between 89 degrees and 91 degrees, and further preferably 90 degrees with a fluctuation of about 0.2 degrees, and most preferably exactly vertical, that is, 90 degrees. With such a configuration, the height of the transmission device 300 according to the utility model can be reduced, so that the structure of the transmission device 300 can be flattened; in addition, the transmission can be achieved by means of the meshing between the arc gears (such as the first arc gear 310 and the second arc gear 320), which can also make the transmission smooth and improve the efficiency and stability of the transmission. In this way, by means of the mutual meshing of the two mutually transmitting arc gears of the transmission device 300 proposed by the utility model, the structure of the transmission device 300 according to the utility model can be flattened, thereby reducing the height of the transmission device 300 according to the utility model, and further reducing the space volume occupied by the transmission device 300 according to the utility model.

[0044] In addition, from Figure 3A It can be seen that the first arc gear 310 or the second arc gear 320 is configured as a hemispherical gear. In this way, the hemispherical gear can be used more optimally to achieve meshing, which can reduce manufacturing costs and achieve better transmission.

[0045] In addition, those skilled in the art should understand that the rotation of two driven shafts after the switching of one driving shaft here is only exemplary and not restrictive. When necessary, it is also possible to realize that one driving shaft drives the rotation of three or more driven shafts after the switching, and so on, which will not be repeated here. In other words, optionally, in order to realize the driving of multiple driven shafts by one driving shaft, another driven gear can be additionally provided according to the transmission device 300 of the utility model, that is, the transmission device 300 according to the utility model can also include a third arc gear (not shown in the figure), the third arc gear and the first arc gear 310 are meshed and connected; and a second driven shaft (not shown in the figure, which is, for example, the rotating shaft of the third arc gear), the second driven shaft and the third arc gear are connected, wherein the longitudinal axis of the second driven shaft intersects or coincides with the longitudinal axis of the driving shaft. In this way, the third arc gear connected to the second driven shaft can also mesh with the first arc gear 310, so that one driving shaft can drive two driven shafts to rotate, and of course, it can also drive more driven shafts to rotate, thereby making the structure of the transmission device 300 according to the utility model flat and reducing the height of the transmission device 300 according to the utility model, thereby reducing the space volume occupied by the transmission device 300 according to the utility model. At this time, the third arc gear is constructed as a hemispherical gear. In this way, the hemispherical gear can be used to achieve meshing in a more optimized manner, which can reduce the manufacturing cost and achieve better transmission.

[0046] According to the utility model Figure 3A In the illustrated embodiment, the meshing mode of the second arc gear 320 and the first arc gear 310 is involute meshing. Preferably, the involute meshing includes involute meshing with equal modules, that is, the two arc gears can be the same in shape, that is, the same size, and the meshing positions are also the same distance from their respective top ends. More preferably, the number of teeth of the large end of the first arc gear 310 or the large end of the second arc gear 320 is constructed to be 18 and the module is constructed to be 0.6; and / or the top of the first arc gear 310 and / or the second arc gear 320 has a flat area. In this way, the problem of loose meshing at the top can be solved, and better meshing can be achieved in other parts.

[0047] Preferably, in an embodiment of the present invention, the transmission device 300 further includes a fixing device (not shown in the figure), and the fixing device is configured to fix the first arc gear 310 relative to the second arc gear 320 .

[0048] Figure 3BFIG. 2 shows a side view of a first arc gear 310 and a second arc gear 320 in a meshing state according to another embodiment of the present invention. Figure 3C FIG. 2 shows a top view of a first arc gear 310 and a second arc gear 320 in a meshing state according to another embodiment of the present invention. Figure 3B and Figure 3C In the embodiment shown, the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially at an angle of 60 degrees, that is, Figure 3B The plane where the large end of the first semi-arc gear 310 is located and the plane where the large end of the second semi-arc gear 320 is located are substantially at an angle of 120 degrees. In this way, the angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft can be adjusted to 60 degrees as required, and the transmission can be performed better. Here, those skilled in the art should understand that the angle range included in the substantially 60-degree angle is, for example, 55 degrees to 65 degrees, preferably between 59 degrees and 61 degrees, and further preferably 60 degrees with a fluctuation of about 0.2 degrees, and most preferably exactly 60 degrees.

[0049] In addition, the utility model also proposes a phase shifter, which includes the transmission device according to the above.

[0050] In addition, the utility model also proposes a base station antenna, which includes the transmission device according to the above or the phase shifter according to the above.

[0051] To sum up, with the help of the two mutually transmitting arc gears of the transmission device proposed in the utility model, meshing can be achieved within a larger angle range, so that the structure of the transmission device according to the utility model can be flattened and the height of the transmission device according to the utility model can be reduced, thereby reducing the space volume occupied by the transmission device according to the utility model.

[0052] Although different exemplary embodiments of the utility model have been described, it is obvious to those skilled in the art that different changes and modifications can be made, which can achieve one or some of the advantages of the utility model without departing from the spirit and scope of the utility model. For those skilled in the art, other components that perform the same function can be appropriately replaced. It should be understood that the features explained with reference to specific figures can be combined with the features of other figures, even in those cases where this is not explicitly mentioned. In addition, the method of the utility model can be implemented in a software implementation using all appropriate processor instructions or in a hybrid implementation using a combination of hardware logic and software logic to obtain the same result. Such modifications to the scheme according to the utility model are intended to be covered by the appended claims.

Claims

1. A transmission device for reversing, characterized in that: The transmission device comprises: a driving shaft configured to provide a driving force to the transmission device; A first arc gear, wherein the first arc gear is connected to the driving shaft; a second arc gear, the second arc gear being meshed and connected with the first arc gear; and A first driven shaft is connected to the second arc gear.

2. The transmission device according to claim 1, characterized in that: The longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft intersect.

3. The transmission device according to claim 2, characterized in that: An included angle between the longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft is between 60 degrees and 150 degrees.

4. The transmission device according to claim 2 or 3, characterized in that: The longitudinal axis of the driving shaft and the longitudinal axis of the first driven shaft are substantially perpendicular to each other or form an angle of 60 degrees.

5. The transmission device according to claim 1, characterized in that: The first arc gear or the second arc gear is configured as a hemispherical gear.

6. The transmission device according to claim 5, characterized in that: The transmission device also includes: a third arc gear, the third arc gear being meshed and connected with the first arc gear; and A second driven shaft, wherein the second driven shaft is connected to the third arc gear, wherein a longitudinal axis of the second driven shaft intersects or coincides with a longitudinal axis of the driving shaft.

7. The transmission device according to claim 6, characterized in that: The third arc gear is configured as a hemispherical gear.

8. The transmission device according to any one of claims 1 to 3, characterized in that: The meshing mode of the second arc gear and the first arc gear is involute meshing.

9. The transmission device according to claim 8, characterized in that: The involute meshing includes involute meshing with equal modules.

10. The transmission device according to any one of claims 1 to 3, characterized in that: The number of teeth of the large end of the first arc gear or the large end of the second arc gear is configured to be 18 and the module is configured to be 0.

6.

11. The transmission device according to claim 1, characterized in that: The transmission device also includes: A fixing device is configured to fix the first arc-shaped gear relative to the second arc-shaped gear.

12. The transmission device according to claim 1, characterized in that: The top end of the first arc-shaped gear and / or the second arc-shaped gear has a flat area.

13. A phase shifter, characterized in that: The phase shifter comprises a transmission according to any one of claims 1 to 12.

14. A base station antenna, characterized in that: The base station antenna comprises a transmission device according to any one of claims 1 to 12.

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