An adjustable phase base station antenna

Abstract

This utility model relates to the field of base station antenna technology, and provides an adjustable phase base station antenna, including a reflector and a phase shifter rotatably mounted on the reflector. The base station antenna also includes a lead screw motor, which is disposed on the reflector. A locking seat is threadedly connected to the lead screw of the lead screw motor. A connecting rod is slidably disposed on the reflector, and the connecting rod can drive the phase shifter to rotate under the drive of the lead screw motor. A cleaning component is disposed on the connecting rod, and the cleaning component has several cleaning rollers. The cleaning rollers can move along the lead screw axis with the connecting rod and cooperate with the lead screw's rotation to clean the threads on the lead screw's peripheral wall. Therefore, the cleaning component can move synchronously with the lead screw drive, and the efficient cleaning structure removes thread impurities, ensuring the stability of the phase shifter drive and reducing maintenance frequency.

Description

Technical Field

[0001] This utility model relates to the field of base station antenna technology, specifically to an adjustable phase base station antenna. Background Technology

[0002] In large transportation hubs such as railway stations, base station antennas are crucial equipment for ensuring mobile communication for passengers. The stability of their signal coverage directly affects the travel experience and emergency communication needs of millions of passengers. To adapt to the complex spatial structure of railway stations (such as waiting halls, platforms, and railway tracks) and the dense distribution of people, base station antennas need to adjust the phase and direction of the signal beam in real time through phase shifters. The precise driving of the phase shifters relies on high-precision mechanical structures such as lead screw drives.

[0003] However, railway stations are densely populated and have complex airflow conditions. Strong airflow from high-speed trains entering and exiting, along with airflow disturbances from air conditioning and ventilation systems, easily cause large amounts of lightweight debris such as dust, paper scraps, fallen leaves, and plastic fragments to float and adhere to the antenna housing and internal components. Furthermore, antennas on some open or semi-open platforms are directly exposed to rain and sandstorms, leading to the accumulation of impurities on internal components, especially in the threaded gaps of the lead screw used for transmission. This continuous accumulation of impurities causes a sharp increase in frictional resistance between the lead screw and transmission components (such as the nut seat), resulting in phase shifter adjustment malfunctions, decreased phase control accuracy, and consequently, signal beam shift and coverage blind spots, affecting passenger communication quality. Alternatively, impurities mixed with rainwater can form corrosive dirt, accelerating wear and corrosion of the lead screw threads and shortening equipment lifespan. More importantly, maintenance of railway station base station antennas must be avoided during peak passenger flow periods, and the time window for high-altitude operations (such as antennas on platform roofs) is extremely limited. Frequent manual cleaning not only increases maintenance costs but may also disrupt emergency communications due to equipment downtime. Utility Model Content

[0004] To overcome the above-mentioned defects, embodiments of this utility model provide an adjustable phase base station antenna, which solves the technical problem that dust and impurities are easily present inside the base station antenna in the prior art, affecting the adjustment of the phase shifter.

[0005] According to one aspect, at least one embodiment of the present invention provides an adjustable phase base station antenna, including a reflector and a phase shifter rotatably mounted on the reflector, the base station antenna further including: A lead screw motor, wherein the lead screw motor is mounted on the reflector plate; A snap-fit ​​connector has a threaded hole, and the snap-fit ​​connector is threadedly connected to the lead screw of the lead screw motor through the threaded hole; A connecting rod is slidably mounted on the reflector plate, with one end of the connecting rod snapped onto the snap-fit ​​seat and the other end of the connecting rod hinged to the phase shifter. The connecting rod can drive the phase shifter to rotate under the drive of the lead screw motor. A cleaning assembly is disposed on the connecting rod. The cleaning assembly has a plurality of cleaning rollers that slide against the lead screw. The cleaning rollers can move along the axial direction of the lead screw with the connecting rod and cooperate with the rotation of the lead screw to clean the threads on the peripheral wall of the lead screw.

[0006] Optionally, the cleaning component includes: The mounting base has a first ring and a second ring. The first ring is detachably connected to the connecting rod. The second ring is sleeved on the lead screw. A plurality of cleaning rollers are arranged at circumferential intervals on the second ring, and the axial direction of the plurality of cleaning rollers is parallel to the axial direction of the lead screw. An oiler, mounted on a mounting base, is used to inject lubricating oil into the threaded grooves on the circumferential wall of the lead screw.

[0007] Optionally, a fastening bolt is threaded onto the mounting base. The fastening bolt has a pressing end located within the first ring body, and the fastening bolt is pressed against the outer wall of the connecting rod through the pressing end.

[0008] Optionally, an annular support is provided inside the second ring body. The annular support is arranged concentrically with the second ring body and is sleeved on the lead screw. Several cleaning rollers are circumferentially spaced and rotatably arranged on the annular support. After the lead screw rotates, the cleaning rollers can rotate under the abutting action of the lead screw and the cleaning rollers.

[0009] Optionally, the outer peripheral wall of the cleaning roller is wrapped with a sponge layer or a bristle layer with bristles.

[0010] Optionally, a plurality of fan-shaped mounting slots are formed between the annular bracket and the mounting base, the oil injector is disposed in the fan-shaped mounting slots, and the oil injector is located at the top of the annular bracket.

[0011] Optionally, the bottom of the lubricator is provided with an oil injection pipe, which is connected to the inside of the lubricator. The end of the oil injection pipe away from the lubricator is the oil outlet end. An oil outlet ball is embedded in and rotatably disposed on the oil outlet end. The oil outlet ball abuts against the threaded groove on the peripheral wall of the lead screw. The oil outlet ball is used to apply the lubricating oil in the oil injection pipe to the threaded groove on the peripheral wall of the lead screw.

[0012] Optionally, an oil inlet hole is provided on the side wall of the oil injector, and a plug can be detachably installed on the oil inlet hole.

[0013] Optionally, the card holder is provided with an indicator rod, one end of which, away from the card holder, passes through the base of the base station antenna and is slidably connected to the base. The indicator rod is provided with scale lines and is used to display the movement distance of the connecting rod.

[0014] Optionally, a support plate is provided on the reflector, and a support hole is provided on the support plate. The connecting rod passes through the support hole, and the support plate is used to support and limit the connecting rod.

[0015] The beneficial effects of this utility model are as follows: In this invention, when the lead screw motor starts, the lead screw rotates, causing the locking seat to move along the lead screw axis. The locking seat then causes the connecting rod to slide on the reflector plate. The connecting rod pushes the phase shifter to rotate around the reflector plate to adjust the phase. Simultaneously, the movement of the connecting rod causes the cleaning component to move synchronously. The cleaning roller moves along the lead screw axis with the connecting rod and rotates in conjunction with the lead screw's rotation due to the contact with the threaded wall of the lead screw, cleaning the threaded gaps on the lead screw's periphery. The cleaning component cleans the lead screw synchronously with the phase shifter's adjustment action, promptly removing dust, debris, and other impurities from the threaded gaps. This prevents phase shifter adjustment jamming and decreased phase control accuracy caused by impurity accumulation, reducing signal beam offset and coverage blind spots. It also reduces the frictional resistance between the lead screw and transmission components, slowing down wear and corrosion, extending equipment lifespan, reducing the frequency of manual cleaning, and lowering maintenance costs. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this utility model and these drawings without any creative effort.

[0017] Figure 1 This is a schematic diagram of the internal structure of a base station antenna in one embodiment of the present invention; Figure 2 for Figure 1 A magnified view of a portion at point A in the embodiment; Figure 3 for Figure 1 The embodiment is shown in the structural diagram of the cleaning component, lead screw, and connecting rod; Figure 4 for Figure 1 A schematic diagram of the cleaning component in the embodiment; Figure 5 for Figure 4 A magnified view of a portion of point B in the embodiment.

[0018] In the diagram: 1. Reflector, 2. Phase shifter, 3. Lead screw motor, 31. Lead screw, 4. Snap-fit ​​seat, 5. Connecting rod, 6. Cleaning assembly, 60. Cleaning roller, 61. Mounting base, 611. First ring body, 612. Second ring body, 613. Sector-shaped mounting groove, 62. Oil injector, 63. Fastening bolt, 64. Annular bracket, 65. Oil injection pipe, 66. Oil outlet ball, 67. Plug, 7. Support plate, 8. Indicator rod. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit its scope.

[0020] To keep the drawings concise, only the parts relevant to the utility model are shown schematically in each drawing; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of the components with the same structure or function is schematically shown, or only one is labeled. In this document, "a" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0021] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0024] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] like Figures 1-5 As shown, this invention illustrates an adjustable phase base station antenna according to one embodiment. The base station antenna includes a reflector 1 and a phase shifter 2 rotatably mounted on the reflector 1. A lead screw motor 3 is mounted on the reflector 1, and a locking seat 4 is threadedly connected to the lead screw 31 of the lead screw motor 3 through its own threaded hole. A connecting rod 5 is slidably mounted on the reflector 1, with one end locked to the locking seat 4 and the other end hinged to the phase shifter 2. A cleaning assembly 6 is mounted on the connecting rod 5, and several cleaning rollers 60 of the cleaning assembly 6 slide against the outer peripheral wall of the lead screw 31. The axial direction of the cleaning rollers 60 is parallel to the axial direction of the lead screw 31. When the lead screw 31 rotates, it can drive the cleaning rollers 60 to rotate. It should be noted that because the cleaning rollers 60 not only rotate on their own axis but also move along the axial direction of the lead screw 31 along with the connecting rod 5, the two end faces of the cleaning rollers 60 are arc-shaped or conical. This prevents the cleaning rollers 60 from getting stuck in the threads of the lead screw 31, ensuring smooth movement of the cleaning rollers 60.

[0026] In the above scheme, when the lead screw motor 3 starts, i.e. when the phase shifter 2 needs to be adjusted, the lead screw 31 rotates, driving the locking seat 4 to move axially along the lead screw 31. The locking seat 4 then drives the connecting rod 5 to slide on the reflector plate 1. The connecting rod 5 pushes the phase shifter 2 to rotate around the reflector plate 1 to adjust the phase. At the same time, when the connecting rod 5 moves, it drives the cleaning component 6 to move synchronously. The cleaning roller 60 moves axially along the lead screw 31 with the connecting rod 5, and under the abutment action with the thread on the peripheral wall of the lead screw 31, it rotates in conjunction with the rotation of the lead screw 31, cleaning the thread gap on the peripheral wall of the lead screw 31.

[0027] The cleaning component 6 cleans the lead screw 31 synchronously with the adjustment action of the phase shifter 2, which can promptly remove dust, debris and other impurities in the thread gap, avoid the phase shifter 2 adjustment jamming and phase control accuracy reduction caused by the accumulation of impurities, reduce signal beam offset and coverage blind spots; at the same time, it reduces the frictional resistance between the lead screw 31 and the transmission components, slows down wear and corrosion, extends the service life of the equipment, reduces the frequency of manual cleaning, and reduces operation and maintenance costs.

[0028] Furthermore, the cleaning assembly 6 includes a mounting base 61 and an oiler 62. The mounting base 61 has a first ring 611 and a second ring 612. The first ring 611 is detachably connected to the connecting rod 5, and the second ring 612 is sleeved on the lead screw 31. A plurality of cleaning rollers 60 are circumferentially spaced and rotatably mounted on the second ring 612, with the axial direction of the cleaning rollers 60 parallel to the axial direction of the lead screw 31. The oiler 62 is mounted on the mounting base 61, and its oil outlet direction corresponds to the threaded groove on the circumferential wall of the lead screw 31.

[0029] In the above scheme, when the connecting rod 5 moves, it drives the mounting base 61 to move synchronously. The cleaning roller 60 on the second ring 612 moves axially along the lead screw 31 and rotates in conjunction with the lead screw 31 to clean impurities in the thread gap. At the same time, the oiler 62 continuously or intermittently injects lubricating oil into the thread groove on the peripheral wall of the lead screw 31. The lubricating oil fills the thread gap and adheres to the surface of the lead screw 31. While cleaning impurities, the cleaning component 6 lubricates through the oiler 62, further reducing the frictional resistance between the lead screw 31 and the locking seat 4, and improving the smoothness and accuracy of the phase shifter 2 adjustment. The lubricating oil can form a protective film on the surface of the lead screw 31, reducing the corrosion of the lead screw 31 by rainwater and moisture, and extending the service life of the lead screw 31.

[0030] Furthermore, a fastening bolt 63 is threadedly connected to the first ring body 611 of the mounting base 61. The pressing end of the fastening bolt 63 is located inside the first ring body 611, and the pressing end can contact the outer wall of the connecting rod 5.

[0031] In the above scheme, after the first ring 611 of the mounting base 61 is fitted onto the connecting rod 5, the fastening bolt 63 is tightened, and its pressing end presses against the outer wall of the connecting rod 5, thus fixing the mounting base 61 to the connecting rod 5. When it is necessary to adjust the position of the mounting base 61 or disassemble it, the fastening bolt 63 is loosened, and the mounting base 61 can be pushed to slide along the connecting rod 5 or removed. The fastening bolt 63 enables a detachable connection between the mounting base 61 and the connecting rod 5, which facilitates the installation, disassembly, and position adjustment of the cleaning component 6, adapts to different cleaning needs, and ensures the stability of the cleaning component 6 when it moves with the connecting rod 5.

[0032] Furthermore, the second ring body 612 is provided with an annular support 64, which is concentric with the second ring body 612 and sleeved on the lead screw 31. Several cleaning rollers 60 are circumferentially spaced and rotatably mounted on the annular support 64, and the cleaning rollers 60 are threadedly abutted against the circumferential wall of the lead screw 31. After the lead screw 31 rotates, the cleaning rollers 60 can rotate on their own axis under the abutting action of the lead screw 31 and the cleaning rollers 60.

[0033] In the above scheme, when the lead screw motor 3 drives the lead screw 31 to rotate, the threaded wall of the lead screw 31 comes into frictional contact with the surface of the cleaning roller 60. Under the action of contact, the cleaning roller 60 rotates around its own axis. At the same time, the annular bracket 64 moves axially along the lead screw 31 with the mounting base 61, driving the cleaning roller 60 to move axially synchronously. The rotating cleaning roller 60 cleans the thread of the lead screw 31 360 degrees. The annular bracket 64 provides stable support for the cleaning roller 60. The cleaning roller 60 rotates while moving axially, which can thoroughly clean the thread gaps on the peripheral wall of the lead screw 31, improve the cleaning coverage and cleaning effect, and avoid local impurity residue.

[0034] Furthermore, the outer peripheral wall of the cleaning roller 60 is wrapped with a sponge layer or a bristle layer with bristles, and the sponge layer or bristle layer is in close contact with the threaded wall of the lead screw 31.

[0035] In the above scheme, when the cleaning roller 60 moves and rotates with the connecting rod 5, the sponge layer can absorb dust, fine debris, and a small amount of liquid impurities in the thread gap of the lead screw 31; the bristles of the brush layer can penetrate deep into the thread gap to clean up stubborn debris and fibrous impurities (such as paper scraps and fallen leaf fragments). The sponge layer and the brush layer are adapted to different types of impurities, improving the cleaning ability of light debris, liquids, and stubborn impurities, ensuring the cleanliness of the thread gap of the lead screw 31, and ensuring smooth transmission.

[0036] Furthermore, a plurality of fan-shaped mounting grooves 613 are formed between the annular bracket 64 and the mounting base 61, and the oiler 62 is fixed in the fan-shaped mounting grooves 613, with the oiler 62 positioned at the top of the annular bracket 64.

[0037] In the above scheme, the lubricator 62 is stably installed via a fan-shaped mounting groove 613. Located at the top of the annular bracket 64, its oil outlet avoids impurities stirred up by the cleaning roller 60 during cleaning, injecting lubricating oil into the thread groove of the lead screw 31. The structure of the fan-shaped mounting groove 613 restricts the wobbling of the lubricator 62, ensuring precise oil injection direction. The top-mounted lubricator 62 reduces contamination of the oil injection port by impurities, while the fan-shaped mounting groove 613 enhances the installation stability of the lubricator 62, ensuring precise injection of lubricating oil into the thread groove and improving lubrication.

[0038] Furthermore, the bottom of the lubricator 62 is provided with an oil injection pipe 65, which is connected to the inside of the lubricator 62. The end of the oil injection pipe 65 away from the lubricator 62 is the oil outlet end. An oil outlet ball 66 is embedded in and rotatably mounted on the oil outlet end. The oil outlet ball 66 abuts against the threaded groove on the peripheral wall of the lead screw 31. The oil outlet ball 66 is used to apply the lubricating oil in the oil injection pipe 65 to the threaded groove on the peripheral wall of the lead screw 31.

[0039] In the above scheme, it should first be clarified that the structure of the oil outlet ball 66 and the oil injection pipe 65 is similar to that of the ballpoint pen refill and ball bearing. However, the specifications of the oil outlet ball 66 and the oil injection pipe in this application are selected according to the specifications of the thread groove. The lubricating oil in the lubricator 62 flows to the oil outlet end through the oil injection pipe 65. The oil outlet ball 66 contacts the thread groove of the rotating lead screw 31 and rotates with the lead screw 31, evenly spreading the lubricating oil on the surface and gaps of the thread groove. The oil outlet ball 66 rotates with the lead screw 31 to achieve even spreading of lubricating oil, avoiding concentrated dripping and waste, and reducing the probability of impurities entering the oil injection pipe 65, ensuring smooth oil injection.

[0040] It should be noted that the oil outlet pipe is located between the two cleaning rollers 60. After the cleaning rollers 60 clean the oil, the thread groove of the lead screw 31 is relatively clean, which not only makes it easier to apply lubricating oil, but also helps to reduce the wear of the balls.

[0041] Furthermore, the side wall of the oiler 62 is provided with an oil inlet hole, and a removable plug 67 is provided on the oil inlet hole, which is sealed to the oil inlet hole.

[0042] In the above scheme, when the lubricating oil in the lubricator 62 is insufficient, the plug 67 is removed, and lubricating oil is added to the lubricator 62 through the oil inlet. After adding the lubricating oil, the plug 67 is reinstalled into the oil inlet to achieve a seal. The oil inlet facilitates regular replenishment of lubricating oil, and the plug 67 prevents dust and moisture from entering the lubricator 62 and contaminating the lubricating oil, ensuring the durability of the lubrication effect.

[0043] Furthermore, an indicator rod 8 is connected to the card holder 4. The end of the indicator rod 8 away from the card holder 4 passes through the base of the base station antenna and slides into the base. The surface of the indicator rod 8 is provided with scale lines. The indicator rod 8 is used to display the movement distance of the connecting rod 5.

[0044] In the above scheme, when the locking seat 4 moves axially along the lead screw 31, it drives the indicator rod 8 to move synchronously. The sliding distance of the indicator rod 8 on the base is displayed visually through the scale lines. This distance corresponds to the moving distance of the connecting rod 5, thus reflecting the rotation adjustment amount of the phase shifter 2. Beneficial effects: The adjustment range of the phase shifter 2 can be visually monitored through the scale lines of the indicator rod 8, facilitating maintenance personnel to calibrate the phase adjustment accuracy, promptly detect abnormal adjustments, and improve equipment monitoring efficiency.

[0045] Furthermore, a support plate 7 is fixed on the reflector 1, and a support hole is formed on the support plate 7. The connecting rod 5 passes through the support hole and slides in cooperation with the support hole. The support plate 7 is used to support and limit the connecting rod 5.

[0046] In the above scheme, when the connecting rod 5 moves axially under the action of the locking seat 4, the support hole of the support plate 7 restricts the radial sway of the connecting rod 5, ensuring that the connecting rod 5 moves stably in a straight line, thereby smoothly pushing the phase shifter 2 to rotate. Beneficial effects: The support plate 7 provides support and limits the connecting rod 5, reducing the sway during its movement, ensuring the stability and accuracy of the phase shifter 2 adjustment, and avoiding phase adjustment errors caused by the offset of the connecting rod 5.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An adjustable phase base station antenna comprising a reflector plate (1) and a phase shifter (2) rotatably mounted on the reflector plate (1), characterized in that, Base station antennas also include: A lead screw motor (3) is mounted on the reflector plate (1); The snap-fit ​​seat (4) has a threaded hole, and the snap-fit ​​seat (4) is threadedly connected to the lead screw (31) of the lead screw motor (3) through the threaded hole; The connecting rod (5) is slidably disposed on the reflector (1), and one end of the connecting rod (5) is snapped onto the snap-fit ​​seat (4), and the other end of the connecting rod (5) is hinged to the phase shifter (2). The connecting rod (5) can drive the phase shifter (2) to rotate under the drive of the lead screw motor (3). A cleaning component (6) is disposed on the connecting rod (5). The cleaning component (6) has a plurality of cleaning rollers (60). The cleaning rollers (60) slide against the lead screw (31). The cleaning rollers (60) can follow the connecting rod (5) to move axially along the lead screw (31) and cooperate with the rotation of the lead screw (31) to clean the threads on the peripheral wall of the lead screw (31).

2. An adjustable phase base station antenna according to claim 1, wherein, The cleaning component (6) includes: Mounting base (61), on which a first ring (611) and a second ring (612) are provided. The first ring (611) is detachably connected to the connecting rod (5). The second ring (612) is sleeved on the lead screw (31). A plurality of cleaning rollers (60) are arranged at circumferential intervals on the second ring (612), and the axial direction of the plurality of cleaning rollers (60) is parallel to the axial direction of the lead screw (31). The lubricator (62) is mounted on the mounting base (61) and is used to inject lubricating oil into the threaded groove on the circumferential wall of the lead screw (31).

3. An adjustable phase base station antenna according to Claim 2, wherein, The mounting base (61) is threaded with a fastening bolt (63), the fastening bolt (63) has a pressing end, the pressing end is located inside the first ring body (611), and the fastening bolt (63) is pressed against the outer wall of the connecting rod (5) through the pressing end.

4. An adjustable phase base station antenna according to Claim 2, wherein, An annular support (64) is provided inside the second ring body (612). The annular support (64) is arranged concentrically with the second ring body (612). The annular support (64) is sleeved on the lead screw (31). Several cleaning rollers (60) are circumferentially spaced and rotated on the annular support (64). After the lead screw (31) rotates, the cleaning rollers (60) can rotate under the abutting action of the lead screw (31) and the cleaning rollers (60).

5. The phase-adjustable base station antenna of claim 1, wherein, The outer peripheral wall of the cleaning roller (60) is covered with a sponge layer or a bristle layer with bristles.

6. An adjustable phase base station antenna according to Claim 4 wherein, A plurality of fan-shaped mounting grooves (613) are formed between the annular bracket (64) and the mounting base (61), the oiler (62) is disposed in the fan-shaped mounting grooves (613), and the oiler (62) is located on the top of the annular bracket (64).

7. An adjustable phase base station antenna according to Claim 2 wherein, The oil injector (62) is provided with an oil injection pipe (65) at its bottom end. The oil injection pipe (65) is connected to the inside of the oil injector (62). The end of the oil injection pipe (65) away from the oil injector (62) is the oil outlet end. An oil outlet ball (66) is embedded in and rotatably arranged on the oil outlet end. The oil outlet ball (66) abuts against the peripheral wall thread groove of the lead screw (31). The oil outlet ball (66) is used to apply the lubricating oil in the oil injection pipe (65) to the peripheral wall thread groove of the lead screw (31).

8. An adjustable phase base station antenna according to Claim 2 wherein, The oil injector (62) has an oil inlet hole on its side wall, and a plug (67) is detachably installed on the oil inlet hole.

9. The phase-adjustable base station antenna of claim 1, wherein, The card holder (4) is provided with an indicator rod (8). One end of the indicator rod (8) away from the card holder (4) passes through the base of the base station antenna and is slidably connected to the base. The indicator rod (8) is provided with scale lines and is used to display the moving distance of the connecting rod (5).

10. The phase-adjustable base station antenna of claim 1, wherein, A support plate (7) is provided on the reflector (1), and a support hole is provided on the support plate (7). The connecting rod (5) passes through the support hole, and the support plate (7) is used to support and limit the connecting rod (5).

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