A multi-hole F-head torque test tool
Patent Information
- Application Number
- CN202522382368.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-11-10
AI Technical Summary
[0003]目前，F头扭力测试通常采用扭力计进行检测：通常采用钳子手动夹紧F头后用扭力计测试，有些F头较大不好夹紧，容易导致所测得的扭力值不准确，进而在锁紧螺母时F头依然容易松动或拉断
本实用新型的多孔位F头扭力测试工装通过利用盖板内侧的橡胶垫对安装在F头封装槽内的尾部屏蔽罩和F头进行压紧固定，有效防止采用电批对F头进行扭力测试时F头松动，能够很好地模拟生产线中用电批锁紧螺母时F头的受力情况，即F头同时受到旋转方向的扭力和向外的直线拉力，进而确保所测得的扭力值的准确性，有效避免了现有技术中手动夹紧F头或将F头焊接在PCB板后再手持扭力计进行测试的方式存在的测量结果不准确、费力耗时、损耗大、成本高的问题，且操作简单，大大提高了检测效率和检测准确性，检测成本低，有利于提高产品质量。
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Figure CN224667154U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of testing tooling technology, specifically to a multi-hole F-head torque testing tooling. Background Technology
[0002] LNBs are coaxial connectors for radio frequency (RF) cables, primarily used for transmitting television signals and satellite signals in devices such as cable TV, satellite antennas, digital set-top boxes, televisions, and modems. LNBs used in set-top boxes consist of an F-type connector and a tail shield located at the bottom of the F-type connector, which are riveted together. The strength of this riveting directly determines the mechanical integrity and electrical performance of the entire LNB. A weak riveting between the F-type connector and the tail shield can cause the F-type connector to loosen or break when tightening the locking nut, leading to mass rework or numerous customer complaints and significant economic losses. Therefore, it is essential to perform torque testing on the F-type connector to ensure that the riveting strength between the F-type connector and the tail shield is up to standard.
[0003] Currently, torque testing of F-head connectors typically uses a torque meter. This usually involves manually clamping the F-head with pliers before testing with the torque meter. However, some F-heads are large and difficult to clamp, leading to inaccurate torque readings. Consequently, the F-head may still loosen or break when tightening the nut. Another method involves soldering the F-head onto a PCB board before testing with a torque meter. Different sizes of F-heads require matching PCB boards, resulting in wasted PCBs, time-consuming, labor-intensive, inefficient, and costly. Regardless of whether manual clamping or soldering is used to fix the F-head, both methods suffer from the following problems: torque meters can only test the torque in the rotational direction of the F-head and cannot simulate the rotational torque and outward linear tension generated when tightening nuts with an electric screwdriver or pneumatic screwdriver during actual production. Therefore, they cannot effectively test the riveting strength of the F-head, and the risk of loosening or breaking the F-head still exists when tightening the nut.
[0004] In view of this, it is essential to develop a multi-hole F-head torque testing fixture that can simulate the force on the F-head when an electric screwdriver tightens a nut, in order to ensure the accuracy of the test results. Utility Model Content
[0005] To overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a multi-hole F-head torque testing fixture. This testing fixture has a simple structure and reasonable design. It can not only simulate the force situation of the F-head when the electric screwdriver is tightening the nut in actual production, but also effectively prevent the F-head from loosening when the electric screwdriver is used to test the torque of the F-head, effectively ensuring the accuracy of the test results and high detection efficiency.
[0006] To solve the above problems, the technical solution adopted by this utility model is as follows: A multi-hole F-head torque testing fixture includes a base, a cover plate, and a front plate. One end of the cover plate is hinged to the base, and the other end is a free end that can be detachably connected to the base. The free end of the base has at least two F-head encapsulation slots, and rubber pads are installed on the cover plate at positions corresponding to the F-head encapsulation slots. When the free end of the cover plate is detachably connected to the free end of the base, the rubber pads abut against the tail shield installed in the F-head encapsulation slots. The front plate is detachably connected to the free end faces of the cover plate and the base.
[0007] In a preferred embodiment of this utility model, the bottom wall of the F-head encapsulation groove is provided with several clearance holes that match the signal pins of the F-head and the grounding pins of the tail shield.
[0008] In a preferred embodiment of this utility model, the distance from the side wall of the F-head encapsulation groove to the free end face of the base to the free end face of the base is greater than the axial length of the tail shield, so that there is a gap between the front plate and the tail shield.
[0009] In a preferred embodiment of this utility model, the front plate is provided with mounting holes that match the F-head encapsulation groove.
[0010] In a preferred embodiment of this utility model, the front plate is fixed to the F head installed in the F head encapsulation groove by a locking nut, so that the front plate is detachably connected to the free end face of the cover plate and the base.
[0011] In a preferred embodiment of this utility model, the cover plate is provided with a groove at the position corresponding to the F-head encapsulation groove, and the rubber pad is installed in the groove and protrudes from the inner surface of the cover plate.
[0012] In a preferred embodiment of this utility model, the free end of the cover plate and the free end of the base are detachably connected by screws.
[0013] In a preferred embodiment of this utility model, the cover plate is hinged to the base via a hinge.
[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model's multi-hole F-head torque testing fixture uses a rubber pad on the inner side of the cover plate to press and fix the tail shield and F-head installed in the F-head encapsulation groove. This effectively prevents the F-head from loosening when using an electric screwdriver to test the torque. It can well simulate the force situation of the F-head when using an electric screwdriver to tighten the nut on the production line. That is, the F-head is simultaneously subjected to torque in the rotational direction and outward linear tension, thus ensuring the accuracy of the measured torque value. It effectively avoids the problems of inaccurate measurement results, laborious and time-consuming, high wear and tear, and high cost associated with the existing technology of manually clamping the F-head or soldering the F-head to the PCB board and then holding the torque meter for testing. Moreover, it is simple to operate, greatly improves the testing efficiency and accuracy, and has low testing cost, which is conducive to improving product quality. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the multi-hole F-head torque testing fixture described in this utility model; Figure 2 This utility model Figure 1 Cross-sectional view; Figure 3 This is a structural schematic diagram of the multi-hole F-head torque testing fixture described in this utility model from another angle; Figure 4 This utility model Figure 3 Top view; Figure 5 This utility model Figure 3 Top view with the front panel, rear shield, and F-head removed; The following are the reference numerals: 1. Base; 11. F-head encapsulation groove; 12. Clearance hole; 13. Clearance groove; 2. Cover plate; 3. Front plate; 4. Rubber pad; 5. Tightening screw; 6. Hinge; 7. Tail shield; 8. F-head; 9. Locking nut. Detailed Implementation
[0016] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.
[0017] like Figures 1-5As shown, the multi-hole F-head 8 torque testing fixture provided by this utility model includes a base 1, a cover plate 2, and a front plate 3. One end of the cover plate 2 is hinged to the base 1, and the opposite end is a free end that can be detachably connected to the base 1; correspondingly, the other end of the base 1 opposite to the hinged end is the free end of the base 1. The hinge between the cover plate 2 and the base 1 allows the cover plate 2 and the base 1 to switch between a closed or far apart state. The free end of the base 1 has at least two F-head encapsulation slots 11 for mounting the tail shield 7. The F-head encapsulation slots 11 have openings facing the cover plate 2 and facing the free end of the base 1, that is, the F-head encapsulation slots 11 have a left side wall, a right side wall, a rear side wall, and a bottom wall. A rubber pad 4 for pressing and fixing the tail shield 7 is installed on the cover plate 2 at the position corresponding to the F-head encapsulation slots 11. When the free end of the cover plate 2 is detachably connected to the free end of the base 1, the cover plate 2 and the base 1 are closed and locked together. The rubber pad 4 abuts against the tail shield 7 installed in the F-head encapsulation groove 11 to press and fix the F-head 8 and the tail shield 7. At the same time, the front plate 3 is detachably connected to the free end face of the cover plate 2 and the base 1. As can be seen from the above solution, this utility model uses the rubber pad 4 on the inner side of the cover plate 2 to press and fix the tail shield 7 installed in the F-head encapsulation groove 11, which effectively prevents the F-head 8 from loosening when the torque test is performed on the F-head 8 with an electric screwdriver. It can well simulate the force situation of the F-head 8 when the nut 9 is locked with an electric screwdriver in the production line. That is, the F-head 8 is simultaneously subjected to the torque in the rotation direction and the outward linear tension, which effectively ensures the accuracy of the measured torque value, and thus ensures that there is sufficient riveting strength between the F-head 8 and the tail shield 7. It effectively avoids the problems of inaccurate measurement results, laborious and time-consuming, large losses and high costs in the prior art of manually clamping the F-head 8 or soldering the F-head 8 to the PCB board and then holding the torque meter for testing. Moreover, the operation is simple, which greatly improves the detection efficiency and accuracy, and the detection cost is low, which is conducive to improving product quality.
[0018] In some embodiments, the bottom wall of the F-head encapsulation groove 11 is provided with a plurality of clearance holes 12 or clearance grooves 13 that match the signal pins of the F-head 8 and the grounding pins of the tail shield 7. During installation, the signal pins of the F-head 8 and the grounding pins of the tail shield 7 are inserted into the corresponding clearance holes 12 or clearance grooves 13 to avoid damage to the signal pins and grounding pins when the rubber pad 4 on the inner side of the cover plate 2 presses against the tail shield 7. Of course, the F-head 8 torque testing fixture of this utility model is not only applicable to the F-head 8 of the PCB board, but can also be applied to the torque testing of other types of F-head 8, as long as the structure of the F-head encapsulation groove 11 is set accordingly according to the type of F-head 8. In some embodiments, the distance from the rear side wall of the F-head encapsulation groove 11 (i.e., the side wall opposite to the vertical end face of the free end of the base 1) to the vertical end face of the free end of the base 1 is greater than the axial length of the tail shield 7, so that there is a gap between the front plate 3 and the tail shield 7, which well simulates the gap between the F-head 8 and the rear plate in the actual production line. The axial length of the tail shield 7 refers to the distance between the two end faces of the tail shield 7 on the central axis of the F-head 8. In some preferred embodiments, the free end of the base 1 has two different sizes of F-head encapsulation slots 11. The number of F-head encapsulation slots 11 of different sizes can be set according to the detection volume. For example, 3 to 5 F-head encapsulation slots 11 can be set for F-heads 8 with a larger detection volume, while 1 to 2 F-head encapsulation slots 11 can be set for F-heads 8 with a relatively smaller detection volume. This not only improves the detection efficiency, but also greatly expands the applicability of the F-head 8 torque testing fixture.
[0019] Specifically, the cover plate 2 has a groove for installing the rubber pad 4 at the position corresponding to the F-head encapsulation groove 11. The rubber pad 4 is installed in the groove and protrudes from the inner surface of the cover plate 2. In some embodiments, the rubber pad 4 is fixed to the groove on the inner surface of the cover plate 2 by an internal hex bolt. In some embodiments, the free end of the cover plate 2 and the free end of the base 1 are detachably connected by a screw threaded connection such as a hand screw 5, which ensures both the pressing and fixing effect of the rubber pad 4 on the tail shield 7 and allows for quick assembly and disassembly. In some embodiments, the cover plate 2 is hinged to the base 1 by a hinge 6, allowing the cover plate 2 and the base 1 to open and close freely from 0 to 180 degrees.
[0020] Specifically, the front plate 3 is a movable plate installed on the free end face of the base 1 and the cover plate 2 during testing. The front plate 3 has mounting holes that match the F-head encapsulation slot 11. The front plate 3 is fixed to the F-head 8 installed in the F-head encapsulation slot 11 by a locking nut 9, thereby achieving a detachable connection between the front plate 3 and the free end face of the cover plate 2 and the base 1. It can be seen that, in addition to simulating the gap between the F-head 8 and the rear plate in the actual production line, the front plate 3 also functions as a gasket. During testing, place the tail shield 7 of the high-frequency head into the corresponding F-head encapsulation slot 11, and insert the signal pin and ground pin into the corresponding clearance hole 12 or clearance slot 13. Then close and lock the cover plate 2 and base 1, so that the rubber pad 4 presses the tail shield 7 in the F-head encapsulation slot 11. Insert the mounting hole of the front plate 3 into the F-head 8, and finally tighten it with the lock nut 9 to fix the front plate 3 on the free end face of the base 1 and the cover plate 2. Then the torque test can be performed.
[0021] This utility model has a simple structure and reasonable design. It can not only simulate the force on the F head when the electric screwdriver tightens the nut, effectively ensuring the accuracy of the measured torque value, but also be applicable to torque testing of F heads of different sizes, greatly improving the testing efficiency.
[0022] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A multi-hole F-head torque testing fixture, characterized in that: The device includes a base, a cover plate, and a front plate. One end of the cover plate is hinged to the base, and the other end is a free end that can be detachably connected to the base. The free end of the base has at least two F-head encapsulation slots, and the cover plate has rubber pads installed at positions corresponding to the F-head encapsulation slots. When the free end of the cover plate is detachably connected to the free end of the base, the rubber pads abut against the tail shield installed in the F-head encapsulation slots. The front plate is detachably connected to the free end faces of the cover plate and the base.
2. The multi-hole F-head torque testing fixture according to claim 1, characterized in that: The bottom wall of the F-head encapsulation slot has several clearance holes that match the signal pins of the F-head and the grounding pins of the tail shield.
3. The multi-hole F-head torque testing fixture according to claim 1, characterized in that: The distance from the sidewall of the F-head encapsulation groove to the free end face of the base to the free end face of the base is greater than the axial length of the tail shield, so that there is a gap between the front plate and the tail shield.
4. The multi-hole F-head torque testing fixture according to claim 1, characterized in that: The front panel has mounting holes that match the F-head encapsulation slot.
5. The multi-hole F-head torque testing fixture according to claim 4, characterized in that: The front plate is fixed to the F head installed in the F head encapsulation groove by a lock nut, so that the front plate is detachably connected to the free end face of the cover plate and the base.
6. The multi-hole F-head torque testing fixture according to claim 1, characterized in that: The cover plate has a groove at the position corresponding to the F-head encapsulation groove, and the rubber pad is installed in the groove and protrudes from the inner surface of the cover plate.
7. The multi-hole F-head torque testing fixture according to claim 1, characterized in that: The free end of the cover plate and the free end of the base are detachably connected by screws.
8. The multi-hole F-head torque testing fixture according to claim 1, characterized in that: The cover plate is hinged to the base via a hinge.