Test device for simulating satellite-rocket separation of cubesat

Abstract

The utility model relates to a test device for simulating satellite-rocket separation of a cubesat. The test device comprises a supporting tool, a cubesat body supported on the supporting tool, a signal collector and a travel switch which are installed at the bottom of the cubesat body, and a spring limiting device installed on the supporting tool. The travel switch is positioned below a conduction arm of the signal collector; the spring limiting device and the travel switch are oppositely arranged below the travel switch; the spring limiting device can stretch and retract in the vertical direction so as to be used for making contact with or being separated from the travel switch. When the spring limiting device makes contact with the travel switch, the spring limiting device is used for providing elastic pressure for the travel switch, and the travel switch abuts against the conduction arm under the action of the elastic pressure. And when the spring limiting device is separated from the travel switch, the travel switch is separated from the conduction arm.

Description

Technical Field

[0001] The utility model relates to the field of aerospace, and in particular to a test device for simulating satellite-rocket separation of a cubic satellite. Background Art

[0002] With the rise of the commercial aerospace sector, more and more private companies have begun to get involved in the satellite field. Micro-nano satellites, as a low-cost and rapidly deployable option, have gradually become an important part of commercial aerospace, among which cubic satellites are highly favored by commercial aerospace.

[0003] As a micro-nano satellite, CubeSat also has the components of conventional satellite systems, and relevant functional testing is an indispensable part of the development process. As the first challenge for CubeSat to enter orbit, satellite-rocket separation is particularly important for testing and verifying its functions. Therefore, a device that can test satellite-rocket separation is urgently needed to provide technical support for the in-orbit verification of CubeSat. Utility Model Content

[0004] The utility model aims to provide a test device for simulating satellite-rocket separation of a cubic satellite.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model provides a test device for simulating satellite-rocket separation of a cubic satellite, comprising: a supporting tool, a cubic satellite body supported on the supporting tool, a signal collector and a travel switch installed at the bottom of the cubic satellite body, and a spring limit device installed on the supporting tool;

[0006] The travel switch is located below the conducting arm of the signal collector;

[0007] The spring limit device is arranged below the travel switch opposite to the travel switch;

[0008] The spring limit device can be extended and retracted in the vertical direction to be used for contacting or separating with the travel switch;

[0009] When the spring limit device contacts the travel switch, it is used to provide elastic pressure to the travel switch, and the travel switch abuts against the conductive arm under the elastic pressure;

[0010] When the spring limiting device is separated from the travel switch, the travel switch is disengaged from the conducting arm.

[0011] According to one aspect of the utility model, the spring limiting device comprises: a movable limiting rod, a first compression spring and a shifting rod;

[0012] Along the vertical direction, the movable limiting rod and the first compression spring are sequentially in contact;

[0013] The shifting rod is arranged on one side of the movable limiting rod perpendicular to the movable limiting rod.

[0014] According to one aspect of the utility model, the supporting fixture is provided with a first mounting groove for mounting the spring limiting device;

[0015] From top to bottom, the movable limiting rod and the first compression spring are sequentially arranged in the first installation groove, and the lower end of the first compression spring abuts against the bottom surface of the first installation groove;

[0016] The cross-sectional shape of the movable limiting rod matches the opening shape of the first mounting groove;

[0017] A guide groove for the sliding of the shifting rod is arranged on the side wall of the first mounting groove.

[0018] According to one aspect of the utility model, the guide groove comprises: a vertical guide portion and a horizontal guide portion communicating with the vertical guide portion;

[0019] The upper end of the vertical guide portion is provided with an opening at the upper end of the side wall of the first mounting groove;

[0020] The horizontal guide portion is communicated with the lower end of the vertical guide portion.

[0021] According to one aspect of the utility model, a limiting groove is provided at one end of the horizontal guide portion away from the vertical guide portion;

[0022] The limiting groove is communicated with the horizontal guide portion, and the limiting groove extends in an upward direction.

[0023] According to one aspect of the utility model, the travel switch comprises: a travel switch limit top block, a second compression spring, and a travel switch limit top cap;

[0024] From top to bottom, the travel switch limit top cap, the second compression spring and the travel switch limit top block are arranged in sequence;

[0025] A spring constant of the second compression spring is smaller than a spring constant of the first compression spring.

[0026] According to one aspect of the utility model, a mounting cavity for mounting the signal collector and the travel switch is provided at the bottom of the cubic star body;

[0027] The installation cavity comprises: a first cavity portion and a second cavity portion which are interconnected;

[0028] From top to bottom, the second cavity portion is sequentially connected with the first cavity portion;

[0029] The signal collector is installed in the second cavity part;

[0030] The travel switch is movably installed in the first cavity portion;

[0031] The conductive arm is arranged opposite to the first cavity portion.

[0032] According to one aspect of the utility model, when the spring limit device is in contact with the travel switch and the signal collector is in a triggered state, the first compression spring and the second compression spring meet the following conditions:

[0033] F1=F2

[0034] ΔL1<ΔL2

[0035] Wherein, F1 represents the elastic pressure of the first compression spring, F2 represents the elastic pressure of the second compression spring, ΔL1 represents the compressed length of the first compression spring when the signal collector is in the triggered state, and ΔL2 represents the compressed length of the second compression spring when the signal collector is in the triggered state;

[0036] When the spring limit device is separated from the travel switch and the signal collector is in a non-triggering state, the first compression spring and the second compression spring meet the following conditions:

[0037] F2=0

[0038] F1=k2×ΔL3

[0039] ΔL2≤ΔL3

[0040] Among them, F1 represents the elastic pressure of the first compression spring, F2 represents the elastic pressure of the second compression spring, ΔL3 represents the compression length of the first compression spring when the signal collector is in a non-triggered state, and ΔL2 represents the compression length of the second compression spring when the signal collector is in a triggered state.

[0041] According to one aspect of the utility model, the supporting tooling comprises: a tooling base plate and a vertical support member vertically arranged on the tooling base plate;

[0042] The vertical support members are provided in plurality and are arranged at equal intervals along the circumference of the tooling bottom plate;

[0043] The vertical support member is a plate-like structure;

[0044] The first mounting groove is arranged on the end surface where the vertical support member abuts against the cubic star.

[0045] According to one aspect of the utility model, the spring limiting device is provided with a plurality of;

[0046] The signal collector and the travel switch are respectively provided with a plurality;

[0047] The number of the spring limit devices is consistent with the number of the travel switches;

[0048] The number of the signal collectors is consistent with the number of the travel switches.

[0049] According to a scheme of the utility model, the structure of the utility model is simple and reliable, and it can be conveniently used for ground simulation of the separation of the cubesat from the rocket during the launch of the rocket, and effectively verifies whether the cubesat can start normally and autonomously after the separation of the rocket and perform on-orbit missions.

[0050] According to a scheme of the utility model, the utility model can simply and effectively verify the maximum effective range of the second compression spring in the travel switch to maintain the triggering of the signal collector by setting the spring coefficient of the first compression spring in the spring limit device to be greater than that of the second compression spring, thereby providing a reliable practical basis for verifying the reliability of the use of the travel switch and parameter optimization.

[0051] According to a scheme of the utility model, the utility model adopts a first compression spring to provide elastic force to the travel switch to keep the signal collector triggered. On the one hand, the first compression spring can effectively simulate the conditions and states of the travel switch triggering the signal collector, avoiding the influence of external force interference on the triggering state of the signal collector. On the other hand, it can also conveniently act on the first compression spring to simulate the movement state of the travel switch when the cubic star-rocket is separated, so that the entire simulation process is closer to the actual satellite-rocket separation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 is a structural diagram schematically showing a test device according to an embodiment of the utility model in an unseparated state;

[0053] Figure 2 It is a schematic representation Figure 1 A magnified view of position A in the middle;

[0054] Figure 3 is a structural diagram schematically showing a test device in a separated state according to an embodiment of the utility model;

[0055] Figure 4 It is a schematic representation Figure 3 A magnified view of position B in the middle;

[0056] Figure 5This is an enlarged view schematically showing the guide groove. DETAILED DESCRIPTION

[0057] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the drawings required for the implementation are briefly introduced below. Obviously, the drawings described below are only some implementations of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0058] When describing the embodiments of the present invention, the orientation or positional relationship expressed by the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or positional relationship shown in the relevant drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the above terms cannot be understood as limiting the present invention.

[0059] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. The implementation methods cannot be described one by one here, but the implementation methods of the present invention are not therefore limited to the following implementation methods.

[0060] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to an embodiment of the utility model, a test device for simulating satellite-rocket separation of a cubic satellite of the utility model comprises: a supporting tool 1, a cubic star body 2 supported on the supporting tool 1, a signal collector 3 and a travel switch 4 installed at the bottom of the cubic star body 2, and a spring limit device 5 installed on the supporting tool 1; in this embodiment, the cubic star body 2 is detachably connected to the supporting tool 1, wherein the travel switch 4 is located below the conducting arm 31 of the signal collector 3; the spring limit device 5 is arranged below the travel switch 4 opposite to the travel switch 4. In this embodiment, the spring limit device 5 can be extended and retracted in the vertical direction to contact or separate from the travel switch 4; wherein, when the spring limit device 5 contacts the travel switch 4, it is used to provide elastic pressure to the travel switch 4, and the travel switch 4 is abutted against the conductive arm 31 under the action of the elastic pressure. At this time, the signal collector 3 is in a triggered state under the action of the conductive arm 31 and can send out a corresponding electrical signal for determining that the cubic star body 2 is in a satellite-rocket unseparated state; when the spring limit device 5 is separated from the travel switch 4, the travel switch 4 is disengaged from the conductive arm 31. At this time, the conductive arm 31 is not subjected to external force, and the signal collector 3 is in an untriggered state and does not send out a corresponding electrical signal for determining that the cubic star body 2 is in a satellite-rocket separated state.

[0061] In this embodiment, the signal collector 3 can be implemented by a contact switch.

[0062] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the utility model, the spring limiting device 5 includes: a movable limiting rod 51, a first compression spring 52 and a lever 53. In this embodiment, the movable limiting rod 51 and the first compression spring 52 are arranged to contact each other in sequence along the vertical direction; wherein the movable limiting rod 51 can be arranged as a round rod with the same cross-sectional size, and its lower end is arranged to abut against the upper end of the first compression spring 52. In this embodiment, the lever 53 is arranged on one side of the movable limiting rod 51 perpendicular to the movable limiting rod 51, wherein the lever 53 can be connected to the movable limiting rod 51 by a threaded connection. In the embodiment, the lever 53 can be made of a round rod.

[0063] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, according to an embodiment of the utility model, the support fixture 1 is provided with a first installation groove 1a for installing the spring limit device 5. In this embodiment, from top to bottom, the movable limit rod 51 and the first compression spring 52 are sequentially arranged in the first installation groove 1a, and the lower end of the first compression spring 52 abuts against the bottom surface of the first installation groove 1a; in this embodiment, the cross-sectional shape of the movable limit rod 51 is arranged to match the opening shape of the first installation groove 1a, wherein the movable limit rod 51 is slidably connected to the first installation groove 1a to achieve telescopic control in the vertical direction. In this embodiment, a guide groove 1a1 for sliding the lever 53 is provided on the side wall of the first installation groove 1a, wherein, through the provided lever 53, an external force can be applied to the lever 53 to control the compression degree of the first compression spring 52 along the guide groove 1a1.

[0064] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, according to one embodiment of the utility model, the guide groove 1a1 includes: a vertical guide portion 1a11 and a horizontal guide portion 1a12 connected to the vertical guide portion 1a11; in this embodiment, the upper end of the vertical guide portion 1a11 has an opening at the upper end of the side wall of the first mounting groove 1a; wherein the horizontal guide portion 1a12 is connected to the lower end of the vertical guide portion 1a11. In this embodiment, the vertical guide part 1a11 is provided to guide the vertical movement of the lever 53, thereby controlling the compression degree of the first compression spring 52, and the horizontal guide part 1a12 is provided to limit the position of the lever 53, so as to ensure the stable pressure on the first compression spring 52. Specifically, when the movable limit rod 51 is moved downward into position by the lever 53, the lever 53 can be rotated into the horizontal guide part 1a12 by horizontally moving the lever 53, and then under the action of the elastic restoring force of the first compression spring 52, the lever 53 is stably supported on the upper side of the horizontal guide part 1a12, so as to achieve stable control of the compression degree of the first compression spring 52.

[0065] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, according to one embodiment of the utility model, a limiting groove 1a13 is provided at one end of the horizontal guide portion 1a12 away from the vertical guide portion 1a11; in this embodiment, the limiting groove 1a13 is arranged to be connected to the horizontal guide portion 1a12, and the limiting groove 1a13 extends in an upward direction.

[0066] Through the setting of the limiting groove 1a13, the position of the lever 53 can be limited in the horizontal direction to ensure the reliability of the position of the lever 53 in the horizontal guide part 1a12, effectively avoid the lever 53 from falling out, and further ensure the stable limitation of the lever 53.

[0067] According to one embodiment of the utility model, a ruler can be attached to one side of the vertical guide part 1a11 flush with the edge of the vertical guide part 1a11, so as to measure the relationship between the movement distance of the lever 53 in the vertical guide part 1a11 and the change in the trigger state of the signal collector 3 by the ruler, and then the corresponding movement range of the second compression spring 42 in the travel switch 4 can be obtained.

[0068] Combination Figure 1 , Figure 2 , Figure 3 ,and Figure 4 As shown, according to an embodiment of the utility model, the travel switch 4 includes: a travel switch limit top block 41, a second compression spring 42, and a travel switch limit top cap 43. In this embodiment, the travel switch limit top cap 43, the second compression spring 42, and the travel switch limit top block 41 are arranged in sequence from top to bottom. In this embodiment, the spring limit device 5 abuts against the travel switch limit top block 41, and then the elastic pressure in the spring limit device 5 can be sequentially transmitted to the travel switch limit top block 41, the second compression spring 42, and the travel switch limit top cap 43, thereby realizing the pressing of the conductive arm 31 on the signal collector 3.

[0069] In this embodiment, the travel switch limit top block 41 is a cylindrical structure as a whole, and its cross-sectional size is constant. In this embodiment, the travel switch limit top cap 43 is a cylindrical structure as a whole, and a radially enlarged protrusion is provided on its upper end.

[0070] In this embodiment, the spring coefficient of the second compression spring 42 is smaller than the spring coefficient of the first compression spring 52. Since the installation position of the signal collector 3 in the cubic star body 2 is fixed, the second compression spring 42 can be compressed. In addition, by setting the spring coefficient of the second compression spring 42 to be smaller than the spring coefficient of the first compression spring 52, the spring limit device 5 and the travel switch 4 can have the same elastic pressure, and under the action of the same elastic pressure, the compression lengths of the first compression spring 52 and the second compression spring 42 are different, that is, there is a difference in deformation, and the first compression spring 52 with a smaller compression stroke can achieve control of the larger compression stroke of the second compression spring 42, and the sensitivity of the travel switch 4 can be effectively detected by the first compression spring 52 with a smaller stroke.

[0071] Combination Figure 1, Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the utility model, a mounting cavity 2a for mounting a signal collector 3 and a travel switch 4 is provided at the bottom of the cubic star body 2; in this embodiment, the mounting cavity 2a includes: a first cavity portion 2a1 and a second cavity portion 2a2 which are connected to each other; wherein, from top to bottom, the second cavity portion 2a2 is sequentially connected to the first cavity portion 2a1. In this embodiment, the signal collector 3 is installed in the second cavity portion 2a2; the travel switch 4 is movably installed in the first cavity portion 2a1. In this embodiment, the conducting arm 31 is arranged opposite to the first cavity portion 2a1.

[0072] In this embodiment, the cross-sectional shape of the first cavity portion 2a1 is matched with the cross-sectional shape of the travel switch limit top block 41, so that the travel switch limit top block 41 can slide back and forth in the first cavity portion 2a1. In this embodiment, the radial dimension of the protrusion at the upper end of the travel switch limit top cap 43 is larger than the cross-sectional shape of the first cavity portion 2a1, so as to limit the escape of the travel switch limit top cap 43 through the first cavity portion 2a1, thereby ensuring reliable and stable installation of the travel switch 4.

[0073] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present invention, when the first compression spring 52 and the second compression spring 42 are both in a compressed state, the travel switch 4 presses against the signal collector 3, thereby triggering the signal collector 3 to simulate the CubeSat being in a state where the satellite and the rocket are not separated. Then, the relationship between the elastic force of the first compression spring 52 and the active travel at this time can be expressed as:

[0074] F1=k1*ΔL1=(G×d1 4 ) / (8×D1 3 ×Nc1)*ΔL1

[0075] Among them, F1 represents the elastic force of the first compression spring 52, k1 represents the spring coefficient of the first compression spring 52, L1 represents the active stroke of the first compression spring 52 (i.e., the compression length), G represents the rigidity modulus of the wire of the first compression spring 52, d2 represents the wire diameter of the first compression spring 52, D1 represents the mean diameter of the first compression spring 52, and Nc1 represents the effective number of turns of the first compression spring 52.

[0076] In addition, the relationship between the elastic force and the movable stroke of the second compression spring 42 at this time can be expressed as:

[0077] F2=k2*ΔL2=(G×d24 ) / (8×D2 3 ×Nc2)*ΔL2

[0078] Among them, F2 represents the elastic force of the second compression spring 42, k2 represents the spring coefficient of the second compression spring 42, L2 represents the active stroke of the second compression spring 42 (i.e., compression length), G represents the rigidity modulus of the wire of the second compression spring 42, d2 represents the wire diameter of the second compression spring 42, D2 represents the mean diameter of the second compression spring 42, and Nc2 represents the effective number of turns of the second compression spring 42.

[0079] Thus, when the spring limit device 5 contacts the travel switch 4 and the signal collector 3 is in the triggered state, the first compression spring 52 and the second compression spring 42 satisfy:

[0080] F1=F2

[0081] ΔL1<ΔL2

[0082] Among them, F1 represents the elastic pressure of the first compression spring 52, F2 represents the elastic pressure of the second compression spring 42, ΔL1 represents the compression length of the first compression spring 52 when the signal collector 3 is in the triggered state, and ΔL2 represents the compression length of the second compression spring 42 when the signal collector 3 is in the triggered state.

[0083] In this embodiment, when the spring limit device 5 is separated from the travel switch 4 and the signal collector 3 is in a non-triggering state, the first compression spring 52 and the second compression spring 42 meet the following conditions:

[0084] F2=0

[0085] F1=k2×ΔL3

[0086] ΔL2≤ΔL3

[0087] Among them, F1 represents the elastic pressure of the first compression spring 52, F2 represents the elastic pressure of the second compression spring 42, ΔL3 represents the compression length of the first compression spring 52 when the signal collector 3 is in a non-triggered state, and ΔL2 represents the compression length of the second compression spring 42 when the signal collector 3 is in a triggered state.

[0088] In this embodiment, in order to match the compression length range of the first compression spring 52, the length of the vertical guide portion 1a11 of the guide groove 1a1 can be correspondingly matched to meet the compression length range of the first compression spring 52. Thus, the second compression spring 42 can be flexibly switched between the compressed state and the natural state, so that the utility model can perform a wider detection of the trigger state range of the signal collector 3, making the detection range of the utility model more comprehensive.

[0089] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the utility model, the support tool 1 includes: a tool base plate 11 and a vertical support member 12 vertically arranged on the tool base plate 11. In this embodiment, a plurality of vertical support members 12 are provided, and are arranged at equal intervals along the circumference of the tool base plate 11; wherein the vertical support member 12 is a plate-shaped structure. In this embodiment, the first mounting groove 1a is provided on the end surface of the vertical support member 12 against the cubic star 2.

[0090] Combination Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, a plurality of spring limit devices 5 are provided; wherein, a spring limit device 5 is provided on each vertical support member 12, for example, two spring limit devices 5 can be provided, and then two vertical support members 12 are used to respectively provide spring limit devices 5 to achieve detection of multiple positions. Correspondingly, a plurality of signal collectors 3 and travel switches 4 are provided respectively; wherein, the number of spring limit devices 5 provided is consistent with the number of travel switches 4 provided; and the number of signal collectors 3 provided is consistent with the number of travel switches 4 provided.

[0091] In order to further illustrate the utility model, the test process of the utility model is further described.

[0092] S1. According to the number of signal collectors 3 and travel switches 4 arranged at the bottom of the cubic star body 2, the number of spring limit devices 5 arranged on the support tooling 1 is set, and the spring limit devices 5 and the travel switches 4 are located below the travel switches 4 in a one-to-one correspondence.

[0093] S2. Move the lever 53 of the spring limit device 5 so that the lever 53 is in the vertical guide portion 1a11 of the guide groove 1a1. At this time, the movable limit rod 51 is lifted up under the elastic force of the first compression spring 52 and abuts against the travel switch limit top block 41.

[0094] S3. Under the elastic force of the first compression spring 52, the second compression spring 42 is compressed, and then the limit top cap 43 of the travel switch is abutted against the conductive arm 31 of the signal collector 3. At this time, by pre-energizing the cubic star body 2 or connecting the detection equipment, it can be judged that the signal collector 3 is in a triggered state through the indicator light (action) of the cubic star body 2 or the signal output by the detection equipment; wherein, since the spring coefficient of the first compression spring 52 is greater than the spring coefficient of the second compression spring 42, the compression stroke of the second compression spring 42 can be obtained based on the aforementioned relationship, and the compression stroke is greater than the compression stroke of the first compression spring 52.

[0095] S4. Move the lever 53 of the spring limit device 5 to move the movable limit rod 51 downward. At this time, the pressure on the second compression spring 42 is reduced and its length is restored under the action of its own elastic force. Therefore, based on the change of the indicator light (action) of the cubic star 2 caused by the electrical signal of the signal collector 3 or the change of the signal output by the detection device, it can be judged whether the signal collector 3 is in an untriggered state, until the lever 53 is moved to the horizontal guide part 1a12 of the guide groove 1a1, and the lever 53 is clamped in the limit groove 1a13. At this time, the second compression spring 42 is completely in a natural extension state to complete the test of the cubic satellite simulation satellite-rocket separation process, and can detect the change law of the electrical signal of the signal collector 3, and determine the action reliability of the signal collector 3 and the travel switch 4 in the satellite-rocket separation process in turn, providing reliable test data and basis for the design of the triggering conditions of the auxiliary signal collector 3 and the travel switch 4.

[0096] The above contents are merely examples of specific solutions of the present invention. For the equipment and structures not described in detail, it should be understood that they are implemented by adopting the general equipment and general methods available in the art.

[0097] The above is only one solution of the utility model and is not intended to limit the utility model. For those skilled in the art, the utility model can be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A test device for simulating the separation of a cubesat and a rocket, characterized in that: include: A supporting tool (1), a cubic star body (2) supported on the supporting tool (1), a signal collector (3) and a travel switch (4) installed at the bottom of the cubic star body (2), and a spring limit device (5) installed on the supporting tool (1); The travel switch (4) is located below the conductive arm (31) of the signal collector (3); The spring limit device (5) is arranged below the travel switch (4) opposite to the travel switch (4); The spring limit device (5) can be extended and retracted in the vertical direction to be in contact with or separated from the travel switch (4); When the spring limit device (5) contacts the travel switch (4), it is used to provide elastic pressure to the travel switch (4), and the travel switch (4) abuts against the conductive arm (31) under the action of the elastic pressure; When the spring limiting device (5) is separated from the travel switch (4), the travel switch (4) is disengaged from the conducting arm (31).

2. The test device according to claim 1, characterized in that: The spring limiting device (5) comprises: a movable limiting rod (51), a first compression spring (52) and a shifting rod (53); Along the vertical direction, the movable limiting rod (51) and the first compression spring (52) are arranged to contact each other in sequence; The shifting rod (53) is arranged on one side of the movable limiting rod (51) in a manner perpendicular to the movable limiting rod (51).

3. The test device according to claim 2, characterized in that: The supporting fixture (1) is provided with a first installation groove (1a) for installing the spring limiting device (5); From top to bottom, the movable limiting rod (51) and the first compression spring (52) are sequentially arranged in the first installation groove (1a), and the lower end of the first compression spring (52) abuts against the bottom surface of the first installation groove (1a); The cross-sectional shape of the movable limiting rod (51) is arranged to match the opening shape of the first mounting groove (1a); A guide groove (1a1) for the sliding of the shifting rod (53) is provided on the side wall of the first installation groove (1a).

4. The test device according to claim 3, characterized in that: The guide groove (1a1) comprises: a vertical guide portion (1a11) and a horizontal guide portion (1a12) connected to the vertical guide portion (1a11); The upper end of the vertical guide portion (1a11) is provided with an opening at the upper end of the side wall of the first mounting groove (1a); The horizontal guide portion (1a12) is arranged to communicate with the lower end of the vertical guide portion (1a11).

5. The test device according to claim 4, characterized in that: A limiting groove (1a13) is provided at one end of the horizontal guide portion (1a12) away from the vertical guide portion (1a11); The limiting groove (1a13) is arranged to communicate with the horizontal guide portion (1a12), and the limiting groove (1a13) extends in an upward direction.

6. The test device according to claim 5, characterized in that: The travel switch (4) comprises: a travel switch limit top block (41), a second compression spring (42), and a travel switch limit top cap (43); From top to bottom, the travel switch limit top cap (43), the second compression spring (42) and the travel switch limit top block (41) are arranged in sequence; The spring constant of the second compression spring (42) is smaller than the spring constant of the first compression spring (52).

7. The test device according to claim 6, characterized in that The bottom of the cubic star (2) is provided with an installation cavity (2a) for installing the signal collector (3) and the travel switch (4); The installation cavity (2a) comprises: a first cavity portion (2a1) and a second cavity portion (2a2) which are communicated with each other; From top to bottom, the second cavity portion (2a2) and the first cavity portion (2a1) are sequentially connected; The signal collector (3) is installed in the second cavity portion (2a2); The travel switch (4) is movably installed in the first cavity portion (2a1); The conductive arm (31) is arranged opposite to the first cavity portion (2a1).

8. The test device according to claim 6, characterized in that: When the spring limit device (5) contacts the travel switch (4) and the signal collector (3) is in a triggered state, the first compression spring (52) and the second compression spring (42) satisfy the following conditions: F1=F2 ΔL1<ΔL2 Wherein, F1 represents the elastic pressure of the first compression spring (52), F2 represents the elastic pressure of the second compression spring (42), ΔL1 represents the compression length of the first compression spring (52) when the signal collector (3) is in the triggered state, and ΔL2 represents the compression length of the second compression spring (42) when the signal collector (3) is in the triggered state; When the spring limit device (5) is separated from the travel switch (4) and the signal collector (3) is in a non-triggered state, the first compression spring (52) and the second compression spring (42) satisfy the following conditions: F2＝0 F1=k2×ΔL3 ΔL2≤ΔL3 Wherein, F1 represents the elastic pressure of the first compression spring (52), F2 represents the elastic pressure of the second compression spring (42), ΔL3 represents the compression length of the first compression spring (52) when the signal collector (3) is in a non-triggered state, and ΔL2 represents the compression length of the second compression spring (42) when the signal collector (3) is in a triggered state.

9. The test device according to claim 6, characterized in that: The supporting tool (1) comprises: a tool base plate (11) and a vertical support member (12) vertically arranged on the tool base plate (11); The vertical support members (12) are provided in plurality and are arranged at equal intervals along the circumference of the tooling base plate (11); The vertical support member (12) is a plate-shaped structure; The first mounting groove (1a) is arranged on the end surface where the vertical support member (12) abuts against the cubic star (2).

10. The test device according to claim 9, characterized in that The spring limiting device (5) is provided in plurality; The signal collector (3) and the travel switch (4) are respectively provided in plurality; The number of the spring limit devices (5) is consistent with the number of the travel switches (4); The number of the signal collectors (3) is consistent with the number of the travel switches (4).

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