High-precision vehicle-mounted antenna lifting rod

Abstract

The high-precision vehicle-mounted antenna lifting rod is used for supporting a vehicle-mounted radar antenna to stably work during advancing and comprises a secondary rod, an upper limiting flange is fixedly arranged at the top of the secondary rod, and a guide groove is formed in the inner wall of the secondary rod; the first-stage rod is arranged in an inner cavity of the second-stage rod and can slide up and down relative to the second-stage rod, and a guide positioning key matched with the guide groove is arranged on the outer wall of the first-stage rod; the lead screw is arranged in an inner cavity of the primary rod, a power mechanism is arranged at the tail of the lead screw, and a nut is arranged on the outer wall of the lead screw in a threaded fit mode; the pre-tightening mechanism is arranged between the nut and the first-stage rod and comprises a shell fixedly connected with the first-stage rod, a bottom cover connected with the bottom of the outer wall of the shell through threads, an inner sleeve arranged between the nut and the shell and a disc spring arranged between the inner sleeve and the shell; the bottom of the inner sleeve is connected with the nut.

Description

Technical Field

[0001] The present invention relates to the technical field of antenna lifting, and particularly relates to a high-precision vehicle-mounted antenna lifting rod. Background Art

[0002] Antenna lifting rods are usually used to support the static operation of communication antennas, with relatively small loads and low requirements for positioning accuracy, only needing to be lifted to a certain height range. For rotating antennas with requirements for working during vehicle movement, the antenna lifting rod requires a positioning structure with complete backlash elimination to ensure sufficient support stiffness when the antenna rotates during vehicle driving. For such antennas, the requirement for repeated positioning of the azimuth angle is relatively high, and the traditional lifting rod structure is not suitable for this working condition. Therefore, in order to improve the positioning accuracy and prevent the twisting and swinging caused by insufficient stiffness of the lifting rod itself due to road bumps, a high-precision antenna lifting rod suitable for working during vehicle movement is needed. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-precision vehicle-mounted antenna lifting rod, which has high positioning accuracy, large bearing capacity, good rigidity, convenient pre-tightening force adjustment, and is suitable for working during vehicle movement.

[0004] To solve the above problems, the present invention provides a high-precision vehicle-mounted antenna lifting rod for supporting the stable rotation of an antenna, including a secondary rod, with an upper limit flange fixedly arranged at the top of the secondary rod, and a guide groove provided on the inner wall of the secondary rod; A primary rod, which can slide up and down relative to the secondary rod and is arranged in the inner cavity of the secondary rod, and a guide positioning key matching with the guide groove is provided on the outer wall of the primary rod; A lead screw, which is arranged in the inner cavity of the primary rod, with a power mechanism provided at the tail of the lead screw, and a nut is in threaded cooperation with the outer wall of the lead screw; A pre-tightening mechanism, which is arranged between the nut and the primary rod, and the pre-tightening mechanism includes a housing fixedly connected with the primary rod, a bottom cover threadedly connected to the bottom of the outer wall of the housing, an inner sleeve configured between the nut and the housing, and a disc spring placed between the inner sleeve and the housing, with the bottom of the inner sleeve connected to the nut.

[0005] Further, 4 groups of positioning inclined surfaces are evenly distributed on the circumference of the upper limit flange; Further, the top of the guide positioning key is of a double-inclined surface structure; the inclined surface structure can be in paired contact with the upper limit flange to form a structure that restricts upward movement and azimuth rotation.

[0006] Further, the housing of the pre-tightening mechanism has a guide block, and the inner sleeve is provided with a guide groove matching with the guide block to convert the rotation of the housing and the inner sleeve into vertical movement.

[0007] Furthermore, a disc spring is placed in the outer shell and the inner sleeve of the preloading mechanism, and the disc spring is tightly pressed by the bottom cover through threads; the preloading force of the disc spring can be adjusted by the screwing depth of the threads.

[0008] Furthermore, the preloading force of the disc spring in the preloading mechanism is about 2 to 3 times the load.

[0009] Furthermore, when stopping, the inclined plane of the upper limit flange first contacts the top inclined plane of the guiding and positioning key, and the lead screw pushes the nut to drive the inner sleeve to continue moving upward for a certain distance to compress the disc spring before stopping.

[0010] Furthermore, the lead screw or the transmission mechanism has a self-locking or braking function when stopping.

[0011] Compared with the prior art, the present invention has the following technical effects: 1) The preloading force of the preloading mechanism of the high-precision vehicle-mounted antenna lifting rod of the present invention makes the limiting contact surfaces fit, has a high contact stiffness, and has a high azimuth angle repeated positioning accuracy; 2) The magnitude of the preloading force of the preloading mechanism of the high-precision vehicle-mounted antenna lifting rod of the present invention is easy to adjust, has strong operability, and the amplitude of the twisting and swinging of the lifting rod is controllable; 3) The preloading mechanism of the high-precision vehicle-mounted antenna lifting rod of the present invention has a large stiffness and a large load-bearing capacity, and is suitable for lifting, positioning during travel, and supporting the antenna to rotate and work. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 is a schematic structural diagram of a high-precision vehicle-mounted antenna lifting rod of the present invention; Figure 2 is a schematic cross-sectional view of a high-precision vehicle-mounted antenna lifting rod of the present invention; Figure 3 is a partial cross-sectional view of a high-precision vehicle-mounted antenna lifting rod of the present invention.

[0013] In the figure: 1: primary rod; 2: upper limit flange; 3: guiding and positioning key; 4: preloading mechanism; 401: outer shell; 402: bottom cover; 403: inner sleeve; 404: disc spring; 5: lead screw; 6: nut; 7: secondary rod; 701: guiding groove; 8: power mechanism. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0014] The following is a detailed description with a specific embodiment in conjunction with the accompanying drawings.

[0015] Please refer to Figure 1 、 Figure 2 and Figure 3 Figure 3 , a high-precision vehicle-mounted antenna lifting rod for supporting the rotary operation of an antenna array surface, comprising a first-stage rod 1, an upper limit flange 2, a guiding and positioning key 3, a pre-tightening mechanism 4, a lead screw 5, a nut 6, and a second-stage rod 7 arranged in sequence from top to bottom. Among them, The upper limit flange 2 is fixedly connected to the top of the second-stage rod 7; The guiding and positioning key 3 is fixed to the outside of the first-stage rod 1; There is a guiding groove 701 inside the second-stage rod 7; The pre-tightening mechanism 4 is arranged between the nut 5 and the first-stage rod 1. Its housing 401 is fixedly connected to the first-stage rod 1, the bottom cover 402 is threadedly connected to the housing 401, a disc spring 404 is placed between the inner sleeve 403 and the housing 401, and the bottom of the inner sleeve 403 is fixedly connected to the nut 6; The nut 6 is connected to the lead screw 7 and is driven by a power mechanism 8.

[0016] In this embodiment, 4 groups of positioning inclined surfaces are evenly distributed on the circumference of the upper limit flange 2; The top of the guiding and positioning key 3 is of a double-inclined surface structure; the inclined surfaces can be paired with the inclined surfaces of the upper limit flange 2 to form a structure that restricts upward movement and azimuth rotation.

[0017] There are guiding protrusions on the housing 401 of the pre-tightening mechanism 4, and there are guiding grooves on the inner sleeve 403 to restrict the rotation of the housing 401 and the inner sleeve 403, and they can only move up and down.

[0018] A disc spring 404 is placed between the housing 401 and the inner sleeve 403 of the pre-tightening mechanism 4, and the disc spring 404 is tightly pressed by the bottom cover 402 through threads; the pre-tightening force of the disc spring can be adjusted by the thread screwing depth.

[0019] The pre-tightening force of the disc spring in the pre-tightening mechanism 4 is about 2 to 3 times the load borne by the lifting rod.

[0020] When the lifting rod stops at the highest position, the inclined surface of the upper limit flange 2 first contacts the top inclined surface of the guiding and positioning key 3. The lead screw 6 pushes the nut 5, driving the inner sleeve 403 to continue moving upward for a certain distance to continuously compress the disc spring. After a certain distance is generated when the joint surface between the inner sleeve 403 and the bottom cover 402 separates, it stops.

[0021] When the lead screw 6 or the driving mechanism 7 stops, it has a self-locking or braking function, which can provide a continuous and stable thrust for antenna support.

[0022] The specific force transmission principle process of the present invention is as follows: The high-precision antenna lifting rod provided by the present invention can achieve high-precision azimuth angle repeat positioning accuracy and support the stable rotation of the antenna for operation.

[0023] During the ascending process, due to the pre-tightening force of the disc spring 404, the joint surface between the bottom cover 402 and the inner sleeve 403 is in contact. When the driving mechanism 7 drives the lead screw 6 to rotate, the nut 5 is driven to move upward. Due to the limitation of the outer shell protrusion and the inner sleeve groove in the pre-tightening mechanism 4, and the limitation of the inner groove 701 of the secondary rod and the guiding positioning key 3, the nut 5 drives the pre-tightening mechanism 4, the guiding positioning key 3, and the primary rod 1 to only move upward in translation. The upper limit flange 2 is fixed at the top of the secondary rod 7 and remains stationary all the time. When the primary rod 1 moves upward until the inclined surface of the guiding positioning key 3 contacts the inclined surface of the upper limit flange 2, mechanical limit is formed. The primary rod 1 can no longer move upward. At this time, the lead screw 6 continues to rotate to push the nut 5 upward, driving the inner sleeve 403 to compress the disc spring 404, and the joint surface between the bottom cover 402 and the inner sleeve 403 separates. After reaching a certain distance, the lead screw 6 stops rotating. Due to the self-locking relationship between the lead screw 6 and the nut 5, the positional relationship between the lead screw 6 and the nut 5 no longer changes. The elastic force of the disc spring 404 compressed by the nut 5 and the inner sleeve 403 is transmitted through the outer shell 401 to the contact surface of the primary rod 1, the guiding positioning key 3, and the upper limit flange 2, forming a stable thrust. This thrust can make the primary lifting rod 1 and the secondary lifting rod 7 have higher contact stiffness and higher positioning accuracy. During movement, it can resist the external up-and-down impact load and azimuth torsional load of the lifting rod and support the stable rotation of the antenna.

[0024] During the descending process, the lead screw 6 rotates in the reverse direction and the nut 5 moves downward in translation. At this time, the disc spring 404 first pushes the inner sleeve 403 to move downward, making the inner sleeve 403 contact the bottom cover 402. Then the nut 5 drives the pre-tightening mechanism 4, the primary rod 1, and the guiding positioning key 3 to separate from the upper limit flange 2 until the lead screw 6 stops rotating at the lowest position and the primary rod 1 stops descending. At this time, due to the pre-tightening force of the disc spring 404 and the self-locking effect of the lead screw 6 and the nut 5, the primary rod remains stable.

[0025] To sum up, in the present invention, when lifted to the highest position, a stable thrust is formed among the lead screw 6, the nut 5, the pre-tightening mechanism 4, the primary rod 1, the guiding positioning key 3, the upper limit flange 2, and the secondary rod 7, which can make the lifting rod have higher repeat positioning accuracy and higher contact stiffness and support the stable rotation of the antenna; the pre-tightening mechanism 4 has high stiffness and can also resist external load disturbances and continuously provide high-precision positioning and stable support during the operation of the vehicle.

[0026] The above disclosure is only a specific embodiment of the present application, but the present application is not limited thereto. Any change that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A high-precision vehicle-mounted antenna lifting rod, characterized in that, Including: A secondary rod, with an upper limit flange fixedly arranged at the top of the secondary rod, and a guide groove arranged on the inner wall of the secondary rod; A primary rod, which can slide up and down relative to the secondary rod and is arranged in the inner cavity of the secondary rod. A guide positioning key matching the guide groove is arranged on the outer wall of the primary rod; A lead screw, which is arranged in the inner cavity of the primary rod. A power mechanism is arranged at the tail of the lead screw, and a nut is in threaded fit with the outer wall of the lead screw; A preloading mechanism, which is arranged between the nut and the primary rod. The preloading mechanism includes a housing fixedly connected to the primary rod, a bottom cover threadedly connected to the bottom of the outer wall of the housing, an inner sleeve configured between the nut and the housing, and a disc spring placed between the inner sleeve and the housing. The bottom of the inner sleeve is connected to the nut.

2. The high-precision vehicle-mounted antenna lifting rod according to claim 1, wherein 4 groups of positioning inclined surfaces are evenly distributed on the circumference of the upper limit flange.

3. The high-precision vehicle-mounted antenna lifting rod according to claim 1, wherein The top of the guide positioning key is of a double-inclined surface structure; the inclined surface structure can be in paired contact with the upper limit flange to form a structure that restricts upward movement and azimuth rotation.

4. The high-precision vehicle-mounted antenna lifting rod according to claim 1, characterized in that, There is a guide block on the housing of the preloading mechanism, and a guide groove matching the guide block is arranged on the inner sleeve to convert the rotation of the housing and the inner sleeve into vertical movement.

5. The high-precision vehicle-mounted antenna lifting rod according to claim 1, characterized in that The disc spring is placed in the housing and the inner sleeve of the preloading mechanism, and the disc spring is tightly pressed by the bottom cover through threads; the preloading force of the disc spring can be adjusted by the thread screwing-in depth.

6. The high-precision vehicle-mounted antenna lifting rod according to claim 1, wherein, The preloading force of the disc spring in the preloading mechanism is 2 to 3 times the load.

7. The high-precision vehicle-mounted antenna lifting rod according to claim 1, wherein When stopping, the inclined surface of the upper limit flange first contacts the top inclined surface of the guide positioning key. The lead screw pushes the nut, driving the inner sleeve to continue moving upward for a certain distance to compress the disc spring before stopping.

8. The high-precision positioning antenna lifting rod according to claim 1, wherein The lead screw or the transmission mechanism has a self-locking or braking function when stopping.

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