Base station antenna transmission device and base station antenna

Abstract

The invention relates to the technical field of mobile communication, in particular to a base station antenna transmission device and a base station antennae, the base station antenna transmission device comprises a fixed seat and a transmission unit, the transmission unit comprises a power input part, a power output part and at least one steering part; the power input part and the power output part are rotatably arranged on the fixed seat, at least one first steering hole is formed in the front end face of the power input part, and at least one second steering hole is formed in the front end face of the power output part; the steering piece is a transmission rod bent into a preset angle, and the two ends of the steering piece are slidably and rotatably arranged in the corresponding first steering hole and the second steering hole in a penetrating mode respectively; the rotation motion of the power input part is transmitted to the power output part through the friction force between the steering piece and the hole walls of the first steering hole and the second steering hole so as to enable the power output part to rotate, so that a phase shifter of the base station antenna is driven to achieve phase adjustment. The problems that traditional gear transmission is serious in abrasion and prone to overload damage are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mobile communication technology, in particular to a base station antenna transmission device and a base station antenna. BACKGROUND

[0002] The transmission device of the base station antenna is a key component for realizing the optimization of the antenna coverage network, and its core function is to control the phase adjuster and other components to adjust the phase, so as to adapt to different network coverage requirements. In the prior art, the transmission device of the base station antenna generally adopts a gear meshing transmission mode, and power transmission is realized through the meshing of multiple gears, thereby driving the phase adjuster to act.

[0003] However, this gear meshing transmission structure has obvious defects: on the one hand, the meshing contact between the gears is a rigid impact contact, and in the long process of reciprocating rotation, the tooth surface is prone to wear and deformation, which not only affects the transmission accuracy, but also shortens the service life of the device, and regular application of lubricating oil is required for maintenance, thereby increasing the use cost; on the other hand, when the input torque is too large or the output end load is abnormal, the gears are prone to jamming or even tooth breakage, resulting in failure of the transmission device, and the associated components such as the motor and shaft system cannot be protected, which seriously affects the stable operation of the base station antenna.

[0004] Therefore, it is a technical problem to be solved in the field to develop a base station antenna transmission device with simple structure, easy manufacturing, small wear and overload protection function. SUMMARY

[0005] The purpose of the present application is to provide a base station antenna transmission device and a base station antenna using the device, so as to solve the problems of serious wear and easy overload damage of the traditional gear transmission.

[0006] In order to achieve the purpose of the present application, the following technical solutions are adopted:

[0007] The first aspect of the present application provides a base station antenna transmission device, which comprises a fixed seat and a transmission unit, the transmission unit comprising a power input part, a power output part and at least one turning part; the power input part and the power output part are rotatably arranged on the fixed seat, the front end surface of the power input part is provided with at least one first turning hole, and the front end surface of the power output part is provided with at least one second turning hole; the turning part is a transmission rod bent at a preset angle, and the two ends of the transmission rod are respectively slidably and rotatably arranged in the corresponding first turning hole and second turning hole.

[0008] The power input part, the turning part and the power output part jointly constitute a friction transmission mechanism, the rotating movement of the power input part is transmitted to the power output part through the friction between the turning part and the hole wall of the first turning hole and the second turning hole to make the power output part rotate, so as to drive the phase shifter of the base station antenna to realize phase adjustment.

[0009] Further improvement lies in that the two ends of the turning part are configured to reciprocally slide along the axial direction of the first turning hole and the second turning hole respectively during transmission, and when one end of the turning part protrudes forward along the axial direction of the corresponding hole, the other end of the turning part is retracted backward along the axial direction of the corresponding hole.

[0010] Further improvement lies in that when the load torque of the output end of the power output part is greater than the transmission torque corresponding to the maximum static friction between the turning part and the hole surface of the first turning hole and the second turning hole, the turning part and the hole surface of the first turning hole and the second turning hole rotate relatively, and the power transmission from the power input part to the power output part is temporarily interrupted to realize overload protection.

[0011] Further improvement lies in that the power input part is provided with a circumferentially extending first clamping groove, the power output part is provided with a circumferentially extending second clamping groove, the fixing seat is provided with a first clamping ring and a second clamping ring, the included angle between the axial centers of the first clamping ring and the second clamping ring is equal to the preset angle; the power input part is rotatably clamped and matched with the first clamping ring through the first clamping groove, and the power output part is rotatably clamped and matched with the second clamping ring through the second clamping groove.

[0012] Further improvement lies in that the transmission unit further comprises a rack connected with the phase shifter, the fixing seat is provided with a limiting groove, the power output part is provided with a cylindrical gear, the cylindrical gear is in meshing transmission with the rack, and the rack is movably embedded in the limiting groove and can move linearly along the extension direction of the limiting groove.

[0013] Further improvement lies in that the transmission rod is a cylindrical rod.

[0014] Further improvement lies in that the preset angle is 90°.

[0015] Further improvement lies in that the number of the turning parts is the same as the number of the first turning holes and the second turning holes, and the turning parts are one-to-one corresponding and adapted.

[0016] Further improvement lies in that the number of the transmission units is multiple groups, and the multiple groups of transmission units are arranged in parallel on the same fixing seat to drive multiple groups of phase shifters.

[0017] The second aspect of the present application provides a base station antenna comprising a base station antenna transmission device as claimed in any one of the first aspects.

[0018] The present application has the following advantages:

[0019] The present application replaces the traditional gear mesh transmission with the friction transmission between the cylindrical surface of the steering piece and the hole surface of the steering hole, avoids the rigid impact and wear between the gear tooth surfaces, prolongs the service life of the device, and does not need to smear lubricating oil, significantly reduces the maintenance requirements, and reduces the maintenance cost.

[0020] The present application integrates the transmission and overload protection functions in one by using the characteristics of friction force power transmission; when the output end load is too large, the friction force between the steering piece and the hole surface of the steering hole will be smaller than the load resistance, at this time the steering piece will slip in the steering hole, the power transmission is temporarily interrupted, thereby avoiding damage to the associated components such as the motor, shaft system, etc. due to overload, and realizing self-protection of the device. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 Figure 1 is a structural schematic diagram of a base station antenna transmission device of the present application;

[0022] Figure 2 Figure 2 is a partial structure explosion diagram of a base station antenna transmission device of the present application;

[0023] Figure 3 Figure 3 is a power input part structural schematic diagram of a base station antenna transmission device of the present application;

[0024] Figure 4 Figure 4 is a power output part structural schematic diagram of a base station antenna transmission device of the present application;

[0025] Figure 5 Figure 5 is a fixed seat structural schematic diagram of a base station antenna transmission device of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS

[0027] 1, power input part; 11, first clamping groove; 12, first steering hole; 2, steering piece; 3, power output part; 31, cylindrical gear; 32, second clamping groove; 33, second steering hole; 4, rack; 5, fixed seat; 51, first clamping ring; 52, second clamping ring; 53, limiting groove. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical scheme and advantages of the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and do not limit the protection scope of the present application.

[0029] It should be noted that when an element is referred to as being "fixed", "set", "secured" or "attached" to another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. Further, when an element is referred to as being "driven" to another element, it can be driven directly or indirectly to the other element, and the specific implementation can be achieved by using the prior art, which will not be described here. When an element is referred to as being perpendicular or approximately perpendicular to another element, it means that the ideal state of the two elements is perpendicular, but due to the influence of manufacturing and assembly, there can be a certain vertical error. The terms "perpendicular", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0031] The "first", "second" involved in the present application do not represent the specific number and order, but only for the name of the distinction.

[0032] Please refer to the accompanying drawings Figure 1 - the accompanying drawings Figure 5 , the first aspect of the embodiment of the application proposes a base station antenna transmission device, comprising a fixed seat 5 and a transmission unit, the number of the transmission unit is multiple groups, multiple groups of the transmission unit are arranged in parallel on the same fixed seat 5, for driving multiple groups of phase shifters (not shown in the figure). Each group of transmission units independently has the functions of power input, transmission and output, and the power output part 3 is respectively connected with a group of phase shifters, forming a control mode of "one transmission unit corresponding to one phase shifter".

[0033] Please refer to the accompanying drawings Figure 1 and 2 It is shown that the embodiment takes controlling four groups of phase shifters as an example, so four groups of the same transmission units are arranged side by side. The specific structure and principle of the transmission unit and the fixed seat 5 will be described in detail below:

[0034] Specifically, the transmission unit comprises a power input part 1, a power output part 3 and at least one steering part 2; the power input part 1 and the power output part 3 are rotatably arranged on the fixed seat 5, the front end surface of the power input part 1 is provided with at least one first steering hole 12, and the front end surface of the power output part 3 is provided with at least one second steering hole 33; the steering part 2 is a transmission rod bent at a preset angle, and the transmission rod is a cylindrical rod, both ends of which are slidably and rotatably arranged in the corresponding first steering hole 12 and second steering hole 33.

[0035] Wherein, the power input part 1, the steering part 2 and the power output part 3 jointly constitute a friction transmission mechanism, the rotational movement of the power input part 1 is transmitted to the power output part 3 through the friction between the steering part 2 and the hole wall of the first steering hole 12 and the second steering hole 33 to make it rotate, so as to drive the phase shifter of the base station antenna to realize phase adjustment.

[0036] It can be understood that the transmission device comprises two core modules of the fixed seat 5 and the transmission unit, wherein the transmission unit is composed of the power input part 1, the power output part 3 and at least one steering part 2, the power input part 1 and the power output part 3 are assembled on the fixed seat 5 through a rotatable structure, the front end surfaces of the two are respectively provided with the first steering hole 12 and the second steering hole 33, the steering part 2 is designed as a transmission rod bent at a preset angle, and both ends thereof are arranged in the corresponding steering hole in a slidable and rotatable double matching mode. When the power input part 1 rotates, the first steering hole 12 hole wall and the steering part 2 surface generate friction, the steering part 2 is driven to move synchronously through the friction, and the steering part 2 transmits power to the power output part 3 through the friction with the hole wall of the second steering hole 33 to make it rotate, so as to finally realize the phase adjustment of the phase shifter.

[0037] The present application replaces the traditional gear mesh transmission with friction transmission, which fundamentally avoids the problems of rigid impact and tooth surface wear caused by gear meshing.

[0038] In the embodiment, both ends of the steering part 2 are configured to reciprocally slide along the axial direction of the first steering hole 12 and the second steering hole 33 respectively during the transmission process, and when one end of the steering part 2 protrudes forward along the axial center of the corresponding hole, the other end thereof is retracted backward along the axial center of the corresponding hole, so that the power input part 1 and the power output part 3 only rotate in the fixed position.

[0039] Specifically, when one end of the steering part 2 protrudes forward along the axial center of the first steering hole 12, the other end of the steering part 2 is retracted backward along the axial center of the second steering hole 33. Similarly, when one end of the steering part 2 is retracted backward along the axial center of the first steering hole 12, the other end of the steering part 2 protrudes forward along the axial center of the second steering hole 33.

[0040] It is understandable that during the transmission process, both ends of the steering component 2 need to slide back and forth along the axial direction of the corresponding first steering hole 12 and second steering hole 33, and the movement has a linkage and reverse characteristic. When one end of the steering component 2 extends forward along the hole axis, the other end must retract backward along the corresponding hole axis, forming a complementary sliding relationship of "one end extends, one end retracts". Based on the bending structure of the steering component 2 and the rotation trajectory of the power input part 1 and the power output part 3, the positional offset caused by rotation is compensated by axial sliding to ensure that the motion trajectory of the three is matched, so that the power input part 1 and the power output part 3 only perform rotational movement in a fixed position.

[0041] In this embodiment, when the load torque at the output end of the power output unit 3 is greater than the transmission torque corresponding to the maximum static friction between the steering component and the surfaces of the first steering hole 12 and the second steering hole 33, the steering component 2 rotates relative to the surfaces of the first steering hole 12 and the second steering hole 33, and the power transmission from the power input unit 1 to the power output unit 3 is temporarily interrupted to achieve overload protection.

[0042] Understandably, when the load torque at the output end of the power output unit 3 is within the normal range, the maximum static friction between the steering component 2 and the steering hole surface is sufficient to transmit power and ensure smooth transmission. When the load at the output end increases abnormally (such as when the phase shifter is stuck), exceeding the transmission torque threshold corresponding to the maximum static friction, the static friction between the steering component 2 and the steering hole surface is converted into sliding friction, and the steering component 2 slips relative to the steering hole, temporarily interrupting the power transmission between the power input unit 1 and the power output unit 3. Once the load torque drops below the threshold, the static friction relationship is restored, and the power transmission automatically restarts.

[0043] When the output load is abnormal, the power transmission is interrupted by slippage, which can effectively prevent the drive motor, shaft system and other related components on the power input side from burning out or breaking due to overload, thus extending the service life of the whole machine. The overload protection process does not require manual intervention, and realizes automatic triggering and automatic recovery, which improves the reliability and safety of the device operation. Unlike gear transmission, which will break teeth due to overload, this invention can automatically resume operation after the overload is released without causing permanent damage. This greatly improves the robustness and safety of the device in harsh environments, while significantly reducing the frequency of device maintenance and maintenance costs.

[0044] In this embodiment, as Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, the power input part 1 is provided with a circumferentially extending annular first groove 11, the power output part 3 is provided with a circumferentially extending annular second groove 32, and the fixed base 5 is provided with a first retaining ring 51 and a second retaining ring 52. The top of the first retaining ring 51 and the second retaining ring 52 are provided with openings, and the included angle formed between the axes of the first retaining ring 51 and the second retaining ring 52 is equal to the preset angle. The power input part 1 forms a rotatable engaging engagement with the first retaining ring 51 through the first groove 11, and the power output part 3 forms a rotatable engaging engagement with the second retaining ring 52 through the second groove 32.

[0045] During assembly, the power input unit 1 is mounted on the first retaining ring 51 of the fixed base 5 via the first retaining groove 11, and can rotate freely around its axis. The power output unit 3 is mounted on the second retaining ring 52 of the fixed base 5 via the second retaining groove 32, and can rotate freely around its axis.

[0046] Understandably, the power input unit 1 is provided with a circumferentially extending first slot 11, the power output unit 3 is provided with a circumferentially extending second slot 32, and the fixing seat 5 is provided with a corresponding first retaining ring 51 and a second retaining ring 52. The slots and retaining rings cooperate to form a rotatable locking structure, which not only achieves stable assembly of the components but also does not restrict rotational movement. The included angle between the axes of the first retaining ring 51 and the second retaining ring 52 is equal to the preset angle of the steering component 2, ensuring that both ends of the steering component 2 can be precisely matched with the steering holes, and the power transmission path is smooth.

[0047] During operation, the motor (not shown) drives the power input unit 1 to rotate around the first retaining ring 51. The rotation of the power input unit 1 causes its first steering hole 12 to rotate, and the inner wall of the first steering hole 12 pushes the steering component 2 to move through friction. Since the other end of the steering component 2 is constrained by the second steering hole 33, and the steering component 2 itself is a bent structure, this motion is decomposed into two components: one is driving the power output unit 3 to rotate around the second retaining ring 52; the other is the reciprocating extension and retraction motion of both ends of the steering component 2 along its axial direction within the two steering holes. This composite motion ensures that the power input unit 1 and the power output unit 3 achieve pure rotational motion in a fixed position.

[0048] In this embodiment, as Figure 1 , Figure 2 , Figure 5 As shown, the transmission unit also includes a rack 4 connected to the phase shifter. A limiting groove 53 is provided on the fixed base 5. The power output part 3 is provided with a cylindrical gear 31, which meshes with the rack 4 for transmission. The rack 4 is movably embedded in the limiting groove 53 and can move linearly along the extension direction of the limiting groove 53. The opening direction of the limiting groove 53 is perpendicular to the axis of the second retaining ring 52.

[0049] It is understandable that when the power output unit 3 rotates, it drives the integrally formed cylindrical gear 31 to rotate synchronously. The cylindrical gear 31 and the spur teeth of the rack 4 form a meshing transmission, converting the rotational power into the linear motion of the rack 4. The rack 4 is set in the limiting groove 53 by a movable fitting method. The limiting groove 53 limits the rack 4 to move only along its extension direction to avoid lateral deviation. The other end of the rack 4 is directly connected to the phase shifter, and the phase shifter is driven by the linear motion to achieve phase adjustment.

[0050] In a preferred embodiment, the preset angle is preferably 90°. By setting the preset angle to 90°, the input shaft of the steering component 2 is perpendicular to the output shaft. This layout saves a lot of space, has a compact structure, and meets the requirement of a compact internal layout for base station antennas. Furthermore, a 90-degree angle is the simplest to process, inspect, and assemble, which helps reduce manufacturing costs and improve assembly accuracy. Of course, those skilled in the art can also set the size of the preset angle according to actual needs.

[0051] In a preferred embodiment, the number of steering components 2 is the same as the number of the first steering holes 12 and the second steering holes 33, and they are matched one-to-one. Specifically, in each transmission unit, the front end face of the power input part 1 is provided with three first steering holes 12, the front end face of the power output part 3 is provided with three second steering holes 33, and the number of steering components 2 is also set to three.

[0052] In summary, this invention solves the problems of severe wear and easy overload damage in traditional gear transmissions, and has the advantages of simple structure, low wear, long service life, and built-in overload protection.

[0053] This invention replaces the traditional gear meshing transmission with friction transmission between the cylindrical surface of the steering component 2 and the surface of the steering hole, avoiding rigid impact and wear between gear teeth, extending the service life of the device, and eliminating the need for lubricating oil, thus significantly reducing maintenance requirements and costs.

[0054] This invention utilizes the characteristic of friction to transmit power, integrating transmission and overload protection functions into one unit. When the output load is too large, the friction between the steering component 2 and the steering hole surface will be less than the load resistance. At this time, the steering component 2 will slip in the steering hole, and the power transmission will be temporarily interrupted, thereby avoiding damage to the motor, shaft system and other related components due to overload, and realizing the self-protection of the device.

[0055] A second aspect of this invention provides a base station antenna, including a base station antenna transmission device as described in any one of the first aspects. Since the other structural components of the base station antenna are prior art, those skilled in the art can implement them by referring to existing technology, and therefore will not be described in detail here.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of specific implementations of the present invention, and while the descriptions are detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A base station antenna transmission device, characterized in that, The device includes a fixed base and a transmission unit. The transmission unit includes a power input section, a power output section, and at least one steering component. The power input section and the power output section are rotatably mounted on the fixed base. The front end face of the power input section is provided with at least one first steering hole, and the front end face of the power output section is provided with at least one second steering hole. The steering component is a transmission rod bent at a preset angle, with its two ends slidably and rotatably passing through the corresponding first steering hole and second steering hole. The power input unit, the steering component, and the power output unit together constitute a friction transmission mechanism. The rotational motion of the power input unit is transmitted to the power output unit through the frictional force between the steering component and the walls of the first steering hole and the second steering hole, causing it to rotate and drive the phase shifter of the base station antenna to achieve phase adjustment.

2. The base station antenna transmission device according to claim 1, characterized in that, The two ends of the steering component are configured to reciprocate along the axial direction of the first steering hole and the second steering hole respectively during transmission, and when one end of the steering component extends forward along the corresponding hole axis, the other end retracts backward along the corresponding hole axis.

3. The base station antenna transmission device according to claim 1, characterized in that, When the load torque at the output end of the power output unit is greater than the transmission torque corresponding to the maximum static friction between the steering component and the surfaces of the first and second steering holes, relative rotation occurs between the steering component and the surfaces of the first and second steering holes, and the power transmission from the power input unit to the power output unit is temporarily interrupted to achieve overload protection.

4. The base station antenna transmission device according to claim 1, characterized in that, The power input part is provided with a first circumferentially extending slot, the power output part is provided with a second circumferentially extending slot, and the fixed base is provided with a first retaining ring and a second retaining ring. The included angle formed between the axes of the first retaining ring and the second retaining ring is equal to the preset angle. The power input part is rotatably engaged with the first retaining ring through the first slot, and the power output part is rotatably engaged with the second retaining ring through the second slot.

5. The base station antenna transmission device according to claim 1, characterized in that, The transmission unit also includes a rack connected to the phase shifter. The fixed base is provided with a limiting groove. The power output part is provided with a cylindrical gear. The cylindrical gear meshes with the rack for transmission. The rack is movably embedded in the limiting groove and can move linearly along the extension direction of the limiting groove.

6. The base station antenna transmission device according to claim 1, characterized in that, The transmission rod is a cylindrical rod.

7. A base station antenna transmission device according to claim 1, characterized in that, The preset angle is 90°.

8. A base station antenna transmission device according to claim 1, characterized in that, The number of steering components is the same as the number of the first steering hole and the second steering hole, and they are matched one-to-one.

9. A base station antenna transmission device according to claim 1, characterized in that, The transmission unit consists of multiple sets, which are arranged in parallel on the same fixed base to drive multiple sets of phase shifters.

10. A base station antenna, characterized in that, Includes a base station antenna drive device as described in any one of claims 1-9.

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