[0021] The present invention will be described in detail below in conjunction with the drawings and embodiments.
[0022] Combine Figure 1-Figure 3 For reference, the present invention provides an embodiment of a transmission system. The transmission system includes: an RCU module 200 and a transmission module 100.
[0023] The RCU module 200 includes an RCU housing 27, a driving mechanism assembled in the RCU housing 27, and a first guiding mechanism 31 provided on the RCU housing 27, and the output end of the driving mechanism is provided with a first transmission interface. The transmission module 100 includes a mounting frame 3, a transmission mechanism assembled on the mounting frame 3 and used to adjust the downward tilt of the phase shifter, and a second guide mechanism 14 arranged on the mounting frame 3, and the input end of the transmission mechanism is provided with The second transmission interface. During installation, by inserting the first guiding mechanism 31 into the second guiding mechanism 14, the first transmission interface and the second transmission interface are matched in transmission and the RCU module 200 and the transmission module 100 are fixed to each other, and the RCU module 200 or transmission needs to be inspected and repaired. In the case of the module 100, the first guide mechanism 31 is pulled out from the second guide mechanism 14 to release the RCU module 200 and the transmission module 100.
[0024] In a specific application embodiment, the transmission mechanism includes a transmission screw 4 and a transmission nut 5. The second transmission interface is a transmission shaft 1. The transmission screw 4 is assembled on the mounting frame 3, and the transmission nut 5 is threadedly matched with the transmission screw 4 and The mounting frame 3 can reciprocate linearly along the drive screw 4 under the restriction of the side wall of the mounting frame 3, and the drive shaft 1 is rigidly connected with the drive screw 4, and then drives the drive nut 5 to move linearly, so as to realize the adjustment of the phase shifter connected with the drive nut 5. The driving mechanism of the RCU module 200 includes an input connector 28 assembled in the RCU housing 27, a control circuit board 30, and a stepping motor 29. The first transmission interface is a transmission gear 26. The input connector 28 is used to receive a base station antenna signal source. It can be an AISG connector. Specifically, the input connector 28 is electrically connected to the control circuit board 30, the control circuit board 30 is electrically connected to the stepping motor 29, and the transmission gear 26 is connected to the output shaft of the stepping motor 29 and drives the transmission gear 26 to rotate. In order to realize output torque amplification and center displacement through the transmission gear 26, the transmission gear 26 can be fixedly assembled inside the RCU module 200 through the gear sleeve 25. Wherein, when the first guide mechanism 31 is inserted into the second guide mechanism 14, the transmission gear 26 meshes with the transmission shaft 1. In this embodiment, the first guide mechanism 31 is a rib provided on both sides of the RCU housing 27, and the second guide mechanism 14 is a guide groove provided on the top of the mounting frame 3. The RCU module 200 can be realized by inserting the rib horizontally into the guide groove. Fixed connection with the transmission module 100.
[0025] Specifically, the mounting frame 3 can also be provided with a card slot 13 to facilitate positioning when the RCU module 200 is inserted into the transmission module 100, which facilitates the subsequent use of bolts to fix the two, so that there is no looseness and relative sliding rotation between the two. Helps to improve transmission accuracy.
[0026] Further, in order to limit the movement stroke of the transmission nut 5 on the transmission screw 4, a locking block (not shown) can be fixedly assembled on the transmission screw 4.
[0027] In a specific application embodiment, the transmission module 100 includes a telescoping mechanism for the indicator ruler 7, and the telescoping mechanism for the indicator ruler 7 includes the indicator ruler 7 arranged parallel to the drive screw 4 and a first elastic member. One end of the first elastic member is connected to the indicator ruler 7, The other end is connected to the mounting frame 3 so that the indicator ruler 7 can be retracted inside the mounting frame 3, and the indicator ruler 7 is clamped by the transmission nut 5 to realize zero-point positioning. When you need to check the inclination angle of the phase shifter, you can pull out the marking ruler 7 to check the scale. When you don't need to check the scale, the marking ruler 7 is automatically retracted in the mounting frame 3 under the elastic force of the first elastic member 11. It helps to effectively protect the marking ruler 7 so as to facilitate and accurately adjust the phase shifter. Specifically, the indicator ruler 7 is provided with a handle 12 at one end away from the first elastic member 11, and the handle 12 is limited to the end surface of the mounting frame 3. When the transmission system is subsequently installed into the housing, the indicator ruler 7 only has the indicator The ruler 7 is exposed on the end surface of the shell, which can easily stretch the marker ruler 7 and prevent the marker ruler 7 from being exposed outside the antenna, so that the marker ruler 7 can be well protected, and it can effectively prevent the marker ruler 7 from freezing to death in rain and snow. risks of.
[0028] In a specific application embodiment, the transmission nut 5 includes a first part that is threadedly matched with the transmission screw 4 and a second part for positioning the indicator ruler 7. The first part and the second part are both threaded sleeve structures, and the indicator ruler 7 telescopic mechanism It also includes an adjustable nut 6. The marking ruler 7 is mounted on the adjustable nut 6 at one end adjacent to the first elastic member 11. In specific use, a fixing seat 10 can be provided. The fixing seat 10 is mounted on the mounting frame 3. The elastic member 11 further connects the indicator ruler 7 with the fixing base 10, and the adjustable nut 6 is threadedly connected with the second part of the transmission nut 5 to realize the zero point positioning, and at the same time, the zero point of the indicator ruler 7 can be fine-tuned. The adjustable nut 6 is mainly used to lock the indicator ruler 7 and limit the limit position when the indicator ruler 7 is pulled for reading, and can fine-tune the movement displacement of the indicator ruler 7 and realize the movement guidance of the indicator ruler 7. Specifically, due to size processing or assembly errors, when the inclination angle of the phase shifter is zero, if the reading of the marking ruler 7 is not zero, the adjustable nut 6 can be adjusted, specifically, the adjustable nut 6 can be rotated forward or reverse. 6 Make it move a small distance compared with the transmission nut 5 (especially the second part of the transmission nut 5), and then realize the zero-returning effect on the zero scale of the indicator ruler 7. This structural method enables the positioning reference of the marking ruler 7 to be upgraded from the end cap positioning commonly used in the industry in the prior art to the positioning of the mounting frame 3 of the present invention, which can solve the scale deviation caused by assembly and processing errors.
[0029] Further, the telescopic mechanism of the indicator ruler 7 also includes a transparent tube 8 and an indicator ruler 7 sleeve 9. The transparent tube 8 is sleeved outside the indicator ruler 7 to protect the indicator ruler 7, and the indicator ruler 7 sleeve 9 is sleeved on the transparent tube. 8 and assembled on the end face of the mounting frame 3 to facilitate accurate reading of the scale of the marking ruler 7.
[0030] Preferably, the transmission module 100 may also be provided with a plurality of shaft washers 2, and a shaft washer 2 may be respectively mounted on both ends of the transmission screw 4, and a shaft washer 2 may be mounted on the end of the transmission shaft 1 contacting the mounting frame 3. In order to reduce the friction between the corresponding parts, save electric energy, and improve the transmission accuracy.
[0031] In a specific application embodiment, the RCU module 200 may further include a clutch needle 24 and a knob 21. One end of the clutch pin 24 can mesh with a gear integrally formed on one end surface of the transmission gear 26, and the other end of the clutch pin 24 is sleeved in the knob 21, and the transmission gear 26 can be manually driven to rotate by rotating the knob 21. Of course, a mounting panel 22 can be fixed on the end surface of the RCU housing 27 where the input connector 28 is provided, one end of the clutch pin 24 passes through the RCU housing 27 and the mounting panel 22 is sleeved in the knob 21. By setting the clutch pin 24, under the extreme condition that the RCU module 200 may be damaged, the transmission module 100 can be manually driven to move to drive the phase shifter downward.
[0032] In a preferred embodiment, the RCU module 200 further includes a second elastic member 23. The second elastic member 23 is assembled between the clutch pin 24 and the transmission gear 26. Pressing and rotating the knob 21 compresses the second elastic member 23 to push the clutch pin 24. It meshes with the gear on one end of the transmission gear 26; when the knob 21 is released, the clutch pin 24 is disengaged from the gear on one end of the transmission gear 26 under the elastic force of the second elastic member 23, that is, the second elastic member 23 The clutch pin 24 springs back to the initial position, and the engagement of the transmission gear 26 is ended. By providing the second elastic member 23 between the clutch pin 24 and the transmission gear 26, it is helpful to quickly release the manual adjustment mode of the transmission module 100, avoid misoperation, and improve transmission accuracy. The second elastic member 23 may be an elastic member such as a clutch spring.
[0033] The working principle of the transmission system of the base station antenna in the above-mentioned embodiment is briefly described as follows: the base station antenna signal source is connected to the control circuit board 30 of the RCU module 200 through an AISG cable, and the transmission gear 26 amplifies the output of the stepping motor 29 for torque and direction The change, in addition, the transmission gear 26 is assembled with the transmission in the transmission module 100, and since the transmission shaft 1 and the transmission screw 4 are rigidly assembled, the transmission gear 26 is the input of the transmission module 100. The transmission screw 4 realizes movement through the rotational movement of the transmission shaft 1, and because the transmission nut 5 in the transmission module 100 is assembled on the transmission screw 4 through threaded fit, the rotation of the transmission screw 4 drives the movement of the transmission nut 5, and the transmission module 100 The middle mounting frame 3 restricts the freedom of movement of the transmission nut 5, so the transmission nut 5 realizes a linear movement parallel to the direction of the transmission screw 4. The transmission screw 4 can realize the linear reciprocating movement of the transmission nut 5 by rotating clockwise and counterclockwise. In addition, the locking blocks assembled at both ends of the transmission screw 4 can limit the movement stroke of the transmission nut 5 and complete the control of the phase shifter. . The reading of marking ruler 7 is mainly telescopic. The indicator ruler 7 and the adjustable nut 6 are assembled on one side of the transmission nut 5. The two ends of the elastic material are respectively connected to the indicator ruler 7 and the fixing base 10. When you need to check the inclination angle, pull out the indicator ruler 7 to realize the degree view. When the inspection is completed and in other situations, the marking ruler 7 is elastically contracted into the base station antenna by the first elastic member made of elastic material. Due to size processing or assembly errors, when the inclination angle of the phase shifter is zero, if the reading of the indicator ruler 7 is not zero, the adjustable nut 6 can be adjusted to achieve the zero scale effect of the indicator ruler 7.
[0034] The transmission system of the embodiment of the present invention can be inserted into the transmission module 100 through the RCU module 200 and realizes transmission cooperation with the transmission module 100. The structure is simple and the transmission accuracy can be improved.
[0035] Keep reading Figure 1-Figure 3 The present invention also provides an embodiment of a base station antenna. The base station includes a transmission system as in any one of the above embodiments and a housing for assembling the transmission system. Wherein, the housing includes an antenna reflector 300 and a radome enclosing the antenna reflector 300. The transmission system includes a transmission module 100 and an RCU module 200. The description of the transmission module 100 and the RCU module 200 is specifically as described above, and will not be repeated here. Wherein, the transmission module 100 can be fixed on the antenna reflector 300 by bolts, and the RCU module 200 of the transmission system inserts the first guide mechanism 31 into the second guide mechanism 14 so that the first transmission interface and the second transmission interface are in cooperation with each other. The RCU module 200 and the transmission module 100 are fixed to each other. In this transmission system, the RCU module 200 and the transmission module 100 are integrally built in the housing. At the same time, the first transmission interface of the RCU module 200 and the second transmission interface of the transmission module 100 are also built in the housing. Specifically, only The handle 12 and the input connector 28 at one end of the marking ruler 7 are exposed at the end cover of the shell, and the remaining transmission components and interfaces are all located in the shell and protected by the shell.
[0036] In this embodiment, the RCU module 200 and the transmission module 100 are both arranged in the antenna reflector 300, which can solve the problem that the interfaces of the RCU module 200 in the prior art are all located outside the antenna reflector 300, due to the influence of external weather and other factors (such as Under severe conditions such as high and low temperature, rain and snow, etc.) the transmission shaft 11 is easy to freeze and corrode, so as to ensure the transmission function of the RCU module 200; at the same time, it can also solve the problem that each interface of the prior art RCU module 200 is placed on the antenna reflector. On the outside of 300, a lot of waterproof tape needs to be wrapped around the connection, which not only takes up a lot of joint space (the multi-frequency antenna is particularly prominent), but also requires higher material and labor costs. In addition, there is a risk of unreliable protection.
[0037] The base station antenna of the above embodiment: by assembling the RCU module 200 and the transmission module 100 as a whole inside the housing, the space required for the external installation of the RCU module 200 can be effectively avoided, and the cable assembly and protection problems can be reduced; at the same time, the RCU module The 200 is plugged into the transmission module 100 to achieve transmission coordination. The structure is simple and compact, and the size is smaller, which can improve the transmission accuracy, and realize the built-in and free replacement of the RCU.
[0038] The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the content of the description and drawings of the present invention, or directly or indirectly applied to other related technical fields, The same reason is included in the scope of patent protection of the present invention.
