CN214748858U - Transmission test tool for electrically-adjusted antenna - Google Patents

Abstract

The utility model relates to the technical field of antennas, a electricity accent antenna transmission test fixture is disclosed, include: a rack for linking to each other with the transmission structure of electricity accent antenna, at least one side meshing of rack is connected with the gear, and the stand is located to the gear rotation cover and the gear is fixed along axial one end butt, and the gear is connected with load adjusting part along axial other end, and load adjusting part is used for exerting pressure to the other end of gear. The utility model provides a pair of electricity accent antenna transmission test fixture sets up rack and gear structure, realizes exerting the movement resistance to the rack through exerting pressure to the gear to can be used to the transmission test of electricity accent antenna, and this frock can realize the equal atress of two-way motion, the true load condition of simulation phase shifter that can be better, make the test result truer and more reliable; and the tool is in a mechanical damping transmission mode, so that the resistance transmission stability is not changed in a high-temperature and low-temperature environment, and the test accuracy and reliability are improved.

Description

Transmission test tool for electrically-adjusted antenna

Technical Field

The utility model relates to an antenna technology field especially relates to an electricity accent antenna transmission test fixture.

Background

The rotation of the motor is converted into linear motion inside most of the electrically-adjusted base station antennas through the lead screw and the nut, the phase of the phase shifter is adjusted, the electrical downtilt angle of the electrically-adjusted base station antennas is further adjusted, and control adjustment and area optimization of antenna signal receiving and sending function coverage are achieved. The transmission frequency inside the electrically-adjusted base station antenna is high, and the requirements on the service life and reliability of the transmission are strict, so that a large number of service life and reliability tests are required for the transmission of the antenna to be put into use.

At present, a weight hanging method is mainly adopted in the industry for simulation test, namely, a weight with a certain weight is hung through a nut to simulate a transmission load, and the nut moves back and forth to test the transmission life of an antenna. The testing method has the defect that the method for suspending the load can only enable the antenna to be stressed in a single direction, cannot simulate the real load condition of the phase shifter, and belongs to the reflection of the unreal condition. And a small part of the damping systems are adopted to change the resistance, so that the resistance exists in the whole process of back-and-forth movement, but the resistance of the electronic and grease damping systems is changed and the test is distorted in the high-and-low temperature environment test.

The transmission test of the existing electrically-tunable antenna has the problems of inaccurate test and test distortion.

SUMMERY OF THE UTILITY MODEL

The utility model provides an antenna test fixture is transferred to electricity for there is the test inaccuracy in the transmission test of solving among the prior art electricity transfer antenna, and the problem of test distortion realizes the driven reliable test of electricity transfer antenna.

The utility model provides an electricity antenna transmission test fixture of transferring, include: a rack for linking to each other with the transmission structure of electricity accent antenna, at least one side meshing of rack is connected with the gear, the stand is located to the gear rotation cover just the gear is fixed along axial one end butt, the gear is connected with load adjusting part along axial other end, load adjusting part is used for exerting pressure to the other end of gear.

According to the utility model provides an electricity accent antenna transmission test fixture, the other end of gear with be equipped with the conduction piece between the load adjusting part, the conduction piece with the integrative rotation of gear is connected.

According to the utility model provides an electricity accent antenna transmission test fixture, load adjusting part includes elastic component and pressfitting spare, the elastic component is located the other end of gear, the pressfitting spare is located the elastic component deviates from the one end of gear.

According to the utility model provides an electricity accent antenna transmission test fixture, the load adjusting assembly still includes the friction disc that is located the elastic component and is close to one end of gear; and a grid stop piece arranged between the elastic piece and the pressing piece.

According to the utility model provides an electricity accent antenna transmission test fixture, still including dismantling the casing and the apron of connection, the stand is located the casing with the lateral wall that the apron is relative is inboard, the casing with the rack correspondence is equipped with the breach, correspond the department with the gear on the apron and be connected with convex cavity, load adjusting part locates inside the cavity.

According to the utility model provides an electricity accent antenna transmission test fixture, the friction disc with the check separation blade respectively with the inner wall of cavity is connected along circumference fixed connection, along axial displacement.

According to the utility model provides an electricity is transferred antenna transmission and is tested frock, be equipped with the portion of inserting on the pressfitting spare, the portion of inserting inserts in the cavity, still be equipped with the mounting hole on the pressfitting spare, still be equipped with the double-screw bolt on the apron, the double-screw bolt passes the mounting hole is connected with the fastener.

According to the utility model provides an electricity accent antenna transmission test fixture, the relative both sides of double-screw bolt are equipped with plane portion respectively, just be equipped with the scale sign on the plane portion.

According to the utility model provides an electricity accent antenna transmission test fixture, the both sides of rack all are equipped with the gear, it is equipped with two to correspond on the apron the cavity, be equipped with the portion of inserting that corresponds respectively with two cavitys on the pressfitting piece.

According to the utility model provides an electricity accent antenna transmission test fixture, the gear with be equipped with the bearing between the stand.

The utility model provides a pair of electricity accent antenna transmission test fixture sets up rack and gear structure, realizes exerting the motion resistance to the rack through exerting pressure to the gear to the transmission of electricity accent antenna is tested, and this frock can realize the equal atress of two-way motion, makes the transmission structure round trip movement overall process all have the resistance, can be better the true load condition of simulation phase shifter, makes the test result more true and reliable; the tool is in a mechanical damping transmission mode, resistance transmission stability is not changed in high and low temperature environments, testing accuracy and reliability are improved, and resistance in the motion process can be adjusted as required.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is an exploded schematic view of the transmission testing tool for the electrically tunable antenna provided by the utility model;

fig. 2 is an overall schematic view of the transmission testing tool for the electrically tunable antenna provided by the present invention;

fig. 3 is a first cross-sectional sectioning schematic diagram of the transmission testing tool for the electrically tunable antenna provided by the utility model;

fig. 4 is a second cross-sectional sectioning schematic diagram of the transmission testing tool for the electrically tunable antenna provided by the utility model;

fig. 5 is a schematic diagram of a cover plate of the transmission testing tool for the electrically tunable antenna provided by the utility model;

fig. 6 is the utility model provides an application schematic diagram of antenna transmission test fixture is transferred to electricity.

Reference numerals:

101. a housing; 102. a bearing; 103. a gear; 104. a rack; 105. a conductive member; 106. a friction plate; 107. an elastic member; 108. a grid block sheet; 109. a cover plate; 110. a pressing part; 111. a fastener; 112. a screw; 201. a motor unit; 202. a screw rod; 203. a nut; 204. a base plate; 101a, a column; 101b, a notch; 103a, gear intermittent grooves; 105a, a discontinuous convex edge of the conducting piece; 106a, friction plate rotation stopping salient points; 108a, grid stop sheet rotation stopping salient points; 109a and a cavity; 109b, a chute; 109c, a stud; 109D, double D structure; 109e, scale mark.

Detailed Description

To make the objects, technical solutions and advantages of the present invention clearer, the drawings of the present invention are combined to clearly and completely describe the technical solutions of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The utility model discloses an electricity accent antenna transmission test fixture is described below with fig. 1-6.

Referring to fig. 1, this embodiment provides an electric tilt antenna transmission test fixture, and this electric tilt antenna transmission test fixture includes: a rack 104 that is used for linking to each other with the transmission structure of electricity accent antenna, at least one side meshing of rack 104 is connected with gear 103, gear 103 rotates the cover and locates stand 101a just gear 103 is fixed along axial one end butt, gear 103 is connected with load adjusting part along the axial other end, load adjusting part is used for exerting pressure to gear 103's the other end.

The rack 104 is engaged with the gear 103, and when the transmission structure of the electrically tunable antenna drives the rack 104 to move, the rack 104 drives the gear 103 to rotate. The gear 103 is rotatably sleeved on the column 101 a. The load adjustment assembly is used to apply pressure to the other end of the gear 103, i.e., to apply a rotational resistance that translates into a resistance to movement of the rack 104. And the rotation resistance can adapt to the rotation of the gear 103 in two directions, namely adapt to the back and forth movement of the rack 104, namely, the resistance can be generated when the rack 104 moves back and forth. When the tool is used for transmission test of the electrically tunable antenna, bidirectional stress can be realized, resistance exists in the whole process of back-and-forth movement of the transmission structure, the real load condition of the phase shifter can be better simulated, and the test result is more real and reliable.

The tool applies moving resistance to the rack 104 through the gear 103, is in a mechanical damping transmission mode, is stable in resistance transmission and does not change in high and low temperature environments, and is beneficial to improving the test accuracy and reliability; furthermore, the adjustable resistance applied to the rack 104 can be realized by changing the pressure applied to the gear by the load adjusting assembly, so that the resistance in the movement process can be adjusted as required.

The tool for testing the transmission of the electrically tunable antenna is provided with the rack and the gear structure, and the rack is applied with motion resistance by applying pressure to the gear, so that the tool can be used for testing the transmission of the electrically tunable antenna, can realize uniform stress of two-way motion, ensures that the transmission structure has resistance in the whole process of back-and-forth motion, can better simulate the real load condition of a phase shifter, and ensures that the test result is more real and reliable; the tool is in a mechanical damping transmission mode, resistance transmission stability is not changed in high and low temperature environments, testing accuracy and reliability are improved, and resistance in the motion process can be adjusted as required.

On the basis of the above embodiment, further, referring to fig. 1, a conducting element 105 is disposed between the other end of the gear 103 and the load adjusting assembly, and the conducting element 105 is integrally and rotatably connected with the gear 103. The conductive element 105 may be a sheet-like structure; the integral rotational connection at the other end of the gear 103 may facilitate better compression of the gear 103 by the load adjustment assembly.

Specifically, referring to fig. 1, the other end of the gear 103 and the conductor 105 may be coupled by a key structure. A gear intermittent groove 103a can be formed in the inner wall of the other end of the gear 103, a transmission piece intermittent convex edge 105a can be formed on one side, facing the gear 103, of the transmission piece 105, and the transmission piece intermittent convex edge 105a is inserted into the other end of the gear 103 and is in matched connection with the gear intermittent groove 103 a; the gear 103 and the transmission piece 105 are integrally rotated.

On the basis of the above embodiment, further, the load adjusting assembly includes an elastic member 107 and a pressing member 110, the elastic member 107 is disposed at the other end of the gear 103, and the pressing member 110 is disposed at one end of the elastic member 107 away from the gear 103. The pressing member 110 is used to apply pressure to the elastic member 107. The elastic member 107 is disposed between the end surface of the gear 103 and the pressing member 110, the pressing member 110 applies pressure to the elastic member 107, so that the elastic member 107 contracts, and the elastic member 107 applies elastic force to the end surface of the gear 103 to form rotational resistance of the gear 103.

Referring to fig. 1, the elastic member 107 is provided as two disc springs in this embodiment. The elastic member 107 includes, but is not limited to, a wave spring, a disc spring, and the like, which are linear compression springs.

Further, the load adjusting assembly may also have other structures, for example, the elastic member may not be provided, the pressing member may be directly provided to apply pressure to the gear, and the like, and the specific structure is not limited to the arrangement form of the elastic member and the pressing member, so as to apply pressure to the gear to form the motion resistance, and is not limited in particular.

On the basis of the above embodiment, further referring to fig. 1, the load adjusting assembly further includes a friction plate 106 disposed at one end of the elastic member 107 close to the gear 103; and a grid stop piece 108 arranged between the elastic piece 107 and the pressing piece 110. The friction plate 106 is arranged to better apply pressure to the end face of the gear 103; the friction plate 106 is disposed between the conductive plate 105 and the elastic member 107, and the frictional force between the friction plate 106 and the conductive plate 105 also contributes to applying a greater resistance to the gear 103. The blocking piece 108 is also a sheet-shaped structure, and the blocking piece 108 can be conveniently connected with the elastic element 107 and can be conveniently pressed by the pressing element 110, so that better pressure transmission is realized.

On the basis of the above embodiment, further referring to fig. 1 and fig. 2, the electric tilt antenna transmission test tool further includes a housing 101 and a cover plate 109 that are detachably connected; the cover plate 109 is detachably attached to the housing 101 at four corners by screws 112. The upright 101a is disposed on the inner side of the sidewall of the casing 101 opposite to the cover plate 109, and the casing 101 and the rack 104 are provided with notches 101b correspondingly. Referring to fig. 5, a protruding cavity 109a is connected to the cover plate 109 corresponding to the gear 103, and the load adjusting assembly is disposed inside the cavity 109 a.

On the basis of the above embodiment, further, the friction plate 106 and the lattice apron plate 108 are respectively fixedly connected with the inner wall of the cavity 109a along the circumferential direction and movably connected with the inner wall along the axial direction. Specifically, referring to fig. 1 and 5, a sliding groove 109b is axially formed on an inner wall of the cavity 109a of the cover plate 109, a friction plate rotation stopping protrusion 106a is formed on a side edge of the friction plate 106, and the friction plate rotation stopping protrusion 106a is correspondingly inserted into the sliding groove 109 b. The side of the grid block piece 108 can also be provided with a grid block piece rotation stopping salient point 108a, and the grid block piece rotation stopping salient point 108a is correspondingly inserted into the sliding groove 109 b. Furthermore, two sliding grooves 109b can be oppositely arranged on the inner wall of the cavity 109a, and two friction plate rotation stopping salient points 106a are correspondingly arranged on the friction plate 106; two grid baffle rotation stopping salient points 108a are correspondingly arranged on the grid baffles 108; the connection stability is improved.

On the basis of the above embodiment, further referring to fig. 1 and fig. 2, the pressing member 110 is provided with an insertion portion, the insertion portion is inserted into the cavity 109a, the pressing member 110 is further provided with a mounting hole, the cover plate 109 is further provided with a stud 109c, and the stud 109c penetrates through the mounting hole to be connected with the fastener 111. The inserting part of the pressing element 110 is inserted into the cavity 109a to press the elastic element 107, and the mounting hole on the pressing element 110 passes through the stud 109c of the cover plate 109 and is linearly movably connected with the stud 109 c. The fastener 111 may be a nut.

In the transmission testing tool for the electrically tunable antenna provided by this embodiment, first, the tightening degree of the nut is adjusted, the pressing element 110 presses the elastic element 107, and the elastic element 107 contracts and deforms, so that a relative pressure is generated between the friction plate 106 and the conductive element 105. When the rack 104 moves linearly, the rack 104 drives the gear 103 to rotate, so that the transmission piece 105 and the friction piece 106 rotate relatively in a friction manner, and a friction resistance is generated, wherein the friction resistance is fed back to be a push-pull resistance of the rack 104. The generated friction resistance and the contraction amount of the elastic part 107 are changed regularly, namely, the constant push-pull resistance can be obtained by adjusting the screwing amount of the nut.

The mechanical damping transmission test tool for the pure metal part, provided by the embodiment, can realize that the resistance in the motion process is adjusted as required, the resistance is not changed in the high and low temperature environment, and the resistance is not changed due to the influence of temperature, so that the service life and the reliability test of the antenna transmission are more truly simulated.

On the basis of the above embodiment, further, referring to fig. 5, two opposite sides of the stud 109c are respectively provided with a plane portion, and the plane portion is provided with a scale mark 109 e. Namely, the stud 109c of the cover plate is a double-D structure 109D, the scale mark 109e is arranged on the plane of the double-D structure 109D, and the scale mark 109e corresponds to different screwing and pressing amounts of the fastener 111 and also corresponds to the pressure between the friction plate 106 and the conductive element 105.

On the basis of the above embodiment, further referring to fig. 1 and fig. 3, the gear 103 is disposed on both sides of the rack 104, the cover plate 109 is correspondingly disposed with two cavities 109a, and the pressing element 110 is disposed with insertion portions corresponding to the two cavities 109a, respectively. That is, one pressing member 109a is used to simultaneously apply pressure to two gears.

Furthermore, the upper side and the lower side of the rack can be meshed with the connecting gears, and the two gears correspond to the two load adjusting assemblies, namely, resistance is applied to the upper side and the lower side of the rack. The gear can be meshed and connected with one side of the rack, and resistance can be applied to one side of the rack; at the moment, a corresponding supporting structure is arranged on the other side of the rack to realize the position stability of the rack. The specific number of gears is not limited.

Further, when the two sides of the rack are provided with the gears, the pressing parts corresponding to the two gears can be of an independent structure, namely, the two independent pressing parts are correspondingly arranged and are respectively used for applying pressure to the two gears. Furthermore, the connecting structure of the pressing piece and the cover plate can be other structures, namely the pressing piece can also apply pressure to the elastic piece through other structures, for example, a threaded structure can be arranged on the inner wall of the cavity on the cover plate, the pressing piece can be inserted into the cavity to be in threaded connection with the cavity, and different pressures can be applied to the elastic piece by adjusting the screwing amount of the pressing piece; or the pressing piece can be inserted into the cavity and connected with the inner wall of the cavity in a clamping manner, and a plurality of clamping positions are arranged along the axial direction of the cavity, so that the elastic piece is compressed differently by adjusting the clamping positions of the pressing piece and the inner wall of the cavity. The concrete connection structure of the pressing part and the cover plate is not limited, so that the purpose of adjusting the pressing degree of the elastic part can be realized.

In addition to the above embodiments, a bearing 102 is further provided between the gear 103 and the column 101 a. The friction force between the gear and the upright post can be reduced as much as possible, so that the rotation resistance of the gear is mainly influenced by the pressure applied by the load adjusting assembly, and the reliability of resistance application can be improved.

On the basis of the above embodiment, further, this embodiment provides an electrically tunable antenna transmission test fixture for solving the problem of distortion of the existing transmission test. As shown in fig. 1 and 2, the transmission testing tool of the present embodiment includes a transmission assembly and a load adjusting assembly, wherein the transmission assembly mainly includes a rack 104, two gears 103, two corresponding bearings 102, and a conducting piece 105; the load adjusting assembly mainly comprises two elastic members 107 and a friction plate 106, it should be noted that in this embodiment, two disc springs are adopted, wave springs or other linear compression springs can be adopted, and the number can be increased or decreased according to the requirement; and is not particularly limited.

As shown in fig. 3, the rack 104 has a double-sided structure, the rack 104 is disposed at a middle position of the two gears 103 and is meshed with the two gears 103 at the same time, and the gear 103 is sleeved on the bearing 102. If the rack 104 is driven to move back and forth along a straight line, the gear 103 can be driven to rotate correspondingly.

As shown in fig. 1, 4 and 5, a gear intermittent groove 103a is formed in one end surface of the gear 103, a conductor intermittent protruding edge 105a is formed in an end surface of the conductor 105 contacting the gear 103, and the conductor intermittent protruding edge 105a is in matched insertion with the gear intermittent groove 103a, so that the installation is facilitated, and the conductor 105 can timely follow the gear 103 to rotate, stop or reverse to rotate and the like.

The transmission testing tool of the embodiment further comprises a shell 101, wherein the cavity of the shell 101 is internally provided with upright columns 101a, the number, the structure and the positions of the upright columns 101a are correspondingly matched with bearings, and the bearings 102 are sleeved on the upright columns 101 a. The housing 101 is notched 101b to ensure that the rack 104 can move across from the middle of the housing 101.

As shown in fig. 4, the load adjusting assembly portion includes two sets of friction plates 106, elastic members 107, grid plates 108, and a pressure element 110, a fastening member 111. One end face of the friction plate 106 is in friction contact with the end face of the conducting piece 105, the other end face of the friction plate 106 is in contact with the elastic piece 107, and the other end of the elastic piece 107 is in contact with the grid blocking piece 108; the two sets of flaps 108 are simultaneously compressed by the compression elements 110.

The transmission testing tool of the embodiment further includes a cover plate 109, and as shown in fig. 5, the cover plate 109 includes a circular cavity 109a, a chute 109b, a stud 109c, a double-D structure 109D, a scale mark 109e, and other main structural parts.

The friction plate 106, the elastic piece 107 and the grid separation plate 108 are all arranged in the cavity 109a, the edge of the friction plate 106 is provided with a friction plate rotation stopping salient point 106a, and the friction plate rotation stopping salient point 106a is assembled in the sliding groove 109b, namely, the friction plate 106 can move linearly along the axis in the cavity 109a but can not rotate; similarly, the bump 108a for stopping rotation of the grid stop sheet is also assembled in the chute 109b of the cover plate, and the grid stop sheet 108 can move linearly along the axis in the cavity 109a but can not rotate; the elastic member 107 is held in the cavity 109a by the friction plate 106 and the barrier plate 108. Therefore, when pressure is applied to the blocking plate 108, the blocking plate 108 compresses the elastic member 107, so that the pressure of the contact surface between the friction plate 106 and the conductive member 105 can be increased.

The pressing part 110 penetrates through the cover plate stud 109c and presses the two groups of grid stopping pieces 108 simultaneously; the fastening piece 111 is screwed and fastened with the stud 109c and is pressed against the closing piece 110, and the compression amount of the elastic piece 107 by the blocking piece 108 can be adjusted through the screwing amount of the fastening piece 111 and the stud 109c, so that the pressure between the friction plate 106 and the conducting piece 105 is adjusted.

According to the objective rule, when the friction coefficient of the contact surface of two objects is constant, the friction force and the pressure of the contact surface are in a direct proportion relation, and the friction force is opposite to the movement direction. Therefore, when the screwing amount of the fastening member 111 is adjusted, different pressures can be sequentially applied to the pressing element 110, the grid plate 108, the elastic member 107 and the friction plate 106, so that different contact pressures can be generated between the friction plate 106 and the conductive member 105. When the rack 104 moves linearly, the gear 103 and the transmission element 105 are driven to rotate in sequence, and the contact pressure between the friction plate 106 and the transmission element 105 generates frictional resistance opposite to the rotation direction of the transmission element 105, so as to reflect the linear movement resistance of the rack 104. The corresponding relation between the resistance and the screwing amount of the fastener 111 can be obtained through actual measurement and is reflected on the scale mark 109e, namely the screwing amount of the fastener 111 and the resistance are corresponding, so that the screwing amount of the fastener 111 can be adjusted according to the required resistance when a transmission tool is used for testing.

Fig. 6 shows an application of the present embodiment. The transmission structure of the electrically tunable antenna generally comprises a motor set 201, a screw rod 202 and a nut 203, and the working principle is that the motor set 201 drives the screw rod 202 to rotate so as to drive the nut 203 to move linearly, and the nut 203 is connected with an antenna internal device, so that the purpose of controlling the electrical downtilt angle of the antenna is achieved. Therefore, in the earlier stage of application of the transmission structure of the electrically tunable antenna, a great number of life and reliability tests need to be performed on the motor 201, the lead screw 202 and the nut 203, and the test method is that the nut 203 circularly moves back and forth and needs to be subjected to reverse resistance. Therefore, in order to test the effect and reflect the real application situation, the resistance needs to be stable and constant, and at the same time, the direction of the resistance needs to be opposite to the moving direction of the nut 203, that is, the resistance needs to be reversed in time when the nut 203 reverses to move. In the weight hanging test mentioned above, the weight resistance is only unidirectional, and does not meet the test requirement; the conventional damping system is sensitive and variable in resistance under high and low temperature conditions, and the test is also distorted.

The use method of the transmission test tool provided by the scheme is that the rack 104 is fixedly connected with the nut 203, and then the transmission module and the tool module are fixed on the bottom plate 204. The amount of rotation of the fastener 111 is adjusted to achieve the desired amount of compression and resistance of the resilient member 107. During testing, when the nut 203 moves along the first direction, the driving rack 104 moves along the first direction, and then the driving gear 103 and the conducting piece 105 move along the first direction, so that constant friction resistance between the conducting piece 105 and the friction plate 106 is applied, and the testing effect of the nut 203 in the first direction is achieved; because the frictional resistance is always opposite to the moving direction, when the nut 203 moves along the second direction, the frictional resistance can be instantly reversed and kept constant, and the test effect of the nut 203 in the second direction can be achieved; repeating the steps for inspecting and judging the service life condition of the transmission module of the electrically tunable antenna.

The reliability test of the transmission structure of the electrically tunable antenna is that the test is placed in a high-temperature environment and a low-temperature environment according to the service life test conditions, and whether the transmission module is reliable or not and whether the application requirements are met or not are examined under different temperature environments. Because the transmission testing tool of the embodiment adopts a pure metal piece and a pure mechanical principle, and avoids using the conventional damping grease and an electronic control principle, the resistance provided by the transmission testing tool of the invention can be constant under the environments with different temperatures.

Preferably, the bearing 102 is adopted in the embodiment to transfer the rotation of the gear 103, so that the gear 103 is prevented from being influenced by resistance generated by other contact, and only friction resistance from the transmission piece 105 and the friction plate 106 is generated, so that the resistance of the transmission tool is more constant, controllable and adjustable.

Preferably, the conducting piece 105 and the friction plate 106 are made of metal materials made of harder materials, and the mutual contact surfaces of the conducting piece 105 and the friction plate 106 are subjected to rough treatment, so that the friction coefficient of the contact surfaces can be increased, and the requirement of higher resistance is met; meanwhile, by adjusting the elastic coefficient of the elastic elements 107 and the number of the elastic elements 107 or increasing the screwing range of the fastening element 111, a wider resistance range can be obtained, and more tests with different resistance requirements can be met.

The transmission test fixture provided by the embodiment can obtain stable and reliable resistance with adjustable selectivity by adjusting the screwing amount of the fastening piece 111, and better satisfies the transmission life test of the electrically tunable antenna. Meanwhile, the transmission test tool provided by the embodiment is not influenced by the ambient temperature, so that the reliability of the transmission module of the electrically tunable antenna at high and low temperatures can be more truly investigated.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. The utility model provides an antenna transmission test fixture is transferred to electricity which characterized in that includes: a rack for linking to each other with the transmission structure of electricity accent antenna, at least one side meshing of rack is connected with the gear, the stand is located to the gear rotation cover just the gear is fixed along axial one end butt, the gear is connected with load adjusting part along axial other end, load adjusting part is used for exerting pressure to the other end of gear.

2. The transmission testing tool for the electrically tunable antenna according to claim 1, wherein a conducting piece is arranged between the other end of the gear and the load adjusting assembly, and the conducting piece is connected with the gear in an integrated rotating mode.

3. The electric tilt antenna transmission test tool according to claim 1, wherein the load adjusting assembly comprises an elastic piece and a pressing piece, the elastic piece is arranged at the other end of the gear, and the pressing piece is arranged at one end, deviating from the gear, of the elastic piece.

4. The transmission testing tool for the electrically tunable antenna according to claim 3, wherein the load adjusting assembly further comprises a friction plate arranged at one end of the elastic member close to the gear; and a grid stop piece arranged between the elastic piece and the pressing piece.

5. The electric tilt antenna transmission test tool according to claim 4, further comprising a shell and a cover plate which are detachably connected, wherein the stand column is arranged on the inner side of the side wall of the shell opposite to the cover plate, the shell is provided with a notch corresponding to the rack, a convex cavity is connected to the cover plate at a position corresponding to the gear, and the load adjusting assembly is arranged inside the cavity.

6. The electric tilt antenna transmission test tool according to claim 5, wherein the friction plate and the lattice separation plate are respectively connected with the inner wall of the cavity in a circumferential fixed manner and in an axial movable manner.

7. The electric tilt antenna transmission test tool according to claim 5, wherein an insertion portion is arranged on the pressing member and inserted into the cavity, a mounting hole is further formed in the pressing member, a stud is further arranged on the cover plate, and the stud penetrates through the mounting hole and is connected with a fastener.

8. The transmission testing tool for the electrically tunable antenna according to claim 7, wherein two opposite sides of the stud are respectively provided with a plane portion, and the plane portions are provided with scale marks.

9. The electric tilt antenna transmission testing tool according to claim 7, wherein the gears are arranged on both sides of the rack, two cavities are correspondingly arranged on the cover plate, and insertion portions corresponding to the two cavities are arranged on the pressing piece respectively.

10. The electric tilt antenna transmission test tool according to any one of claims 1 to 9, wherein a bearing is arranged between the gear and the upright column.

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