An assembly and disassembly positioning device for an inertial group and a test tool and a design method thereof

Abstract

A device for assembling and disassembling positioning of an inertial group and a test tool belongs to the technical field of inertial group testing. The device includes a base, a displacement module, a micro-motion module, an anti-collision shell and a positioning module; the displacement module, the micro-motion module, the anti-collision shell and the positioning module are sequentially installed on the base from bottom to top; the displacement module includes a lifting platform, an adapter plate, an xy displacement platform and a connecting plate to realize the upward, downward, left and right movement positioning of the inertial group; the micro-motion module includes a linear bearing, a guide shaft and an elastic component to realize the downward displacement of the inertial group without using a lifting platform, making the installation and disassembly process more flexible; the anti-collision shell is made of non-metallic material to ensure that it will not damage the surface of the inertial group; the positioning module includes a positioning plate, an elbow clamp seat and an elbow clamp to realize the rapid and non-destructive positioning and clamping of the test tool on the base; the present invention can not only ensure the reliable and stable installation and disassembly between the inertial group and the test tool, but also take into account multiple models of inertial groups to realize the versatility of the assembly and disassembly positioning device.

Description

Technical Field

[0001] The invention relates to an assembly and disassembly positioning device for an inertial group and a testing tool and a design method thereof, and the invention belongs to the technical field of inertial group testing. Background Art

[0002] With the development of aerospace industry, the demand for inertial groups continues to increase, and the safety performance requirements in the inertial group testing process are also constantly improving.

[0003] Before the inertial group is tested, it needs to be installed on the test fixture. At present, this installation process relies on manual adjustment, and the reserved installation space between the inertial group and the test fixture is not large, only accommodating the thickness of two palms. Therefore, the firmness of the product during installation will depend on the friction between the human hand and the product, which requires experienced masters to operate. The success rate of one-time adjustment depends on manual experience, and there is a risk of product slippage and damage. Similarly, after the inertial group is tested, it needs to be removed from the test fixture, and the above problems will also be encountered due to insufficient removal space.

[0004] Furthermore, there are many types of inertial groups. For example, the assembly and disassembly positioning devices of the inertial groups and test fixtures cannot be applied to multiple models and cannot be interchanged or borrowed, which will also cause a waste of design costs and manufacturing costs. Summary of the invention

[0005] The technical problem solved by the present invention is: to overcome the shortcomings of the prior art and to provide an assembly and disassembly positioning device and a design method for an inertial group and a test tool, which can not only ensure reliable and stable assembly and disassembly between the inertial group and the test tool, but also take into account various types of inertial groups, thereby achieving the versatility of the assembly and disassembly positioning device.

[0006] The technical solution of the present invention is:

[0007] A device for assembling and disassembling an inertial group and a testing tool, comprising: a base (10), a displacement module (20), a micro-motion module (30), an inertial group (40), a positioning module (50), a testing tool (60), and an anti-collision shell (70);

[0008] The base (10) is a square cavity structure, which is open upward and forward. The displacement module (20) is fixed in the cavity of the base (10) and is used to provide movement in the X direction and the Y direction in the horizontal plane and movement in the vertical direction. The micro-motion module (30) is installed above the displacement module (20) and is used to provide micro-displacement in the vertical direction. The test fixture (60) is fixed on the base (10) through the positioning module (50). The lower end of the inertial group (40) assembled with the test fixture (60) is covered with an anti-collision shell (70), and the anti-collision shell (70) is fixed to the top of the micro-motion module (30).

[0009] Furthermore, there is a through hole on each of the left and right sides of the middle flange of the inertial assembly (40) for installation and positioning with the test fixture (60).

[0010] Furthermore, the displacement module (20) comprises a lifting platform (24), an adapter plate (23), an XY displacement platform (22) and a connecting plate (21);

[0011] The lifting platform (24) is fixed to the bottom of the cavity of the base (10) by screws, the adapter plate (23) is fixed to the lifting platform (24) by screws, the XY displacement platform (22) is fixed to the adapter plate (23) by screws, and is used to provide XY displacement in the horizontal plane, and the connecting plate (21) is fixed to the XY displacement platform (22) by screws; the micro-motion module (30) is installed on the lifting platform (24) through the connecting plate (21) to provide micro displacement in the vertical direction.

[0012] Furthermore, the micro-motion module (30) includes a linear bearing (33), a guide shaft (32) and an elastic component (31); the elastic component (31) includes a spring top seat (311), a spring (312) and a spring base (313);

[0013] The spring top seat (311) passes through the spring base (313), so that the flange of the spring top seat (311) is close to the top surface of the inner hole of the spring base (313), and then the spring (312) is placed in the inner hole of the spring top seat (311). The spring top seat (311) and the guide shaft (32) are both installed on the anti-collision shell (70) by screws, and the spring base (313) and the linear bearing (33) are both installed on the connecting plate (21) by screws.

[0014] Furthermore, when the spring (312) is placed in the spring base (313) and the spring top seat (311), an initial compression will be generated, and the force generated by the compression is equivalent to the weight of the inertia group (40).

[0015] Furthermore, the positioning module (50) comprises a positioning plate (53), a toggle clamp seat (52) and a toggle clamp (51);

[0016] The positioning plate (53) and the toggle clamp seat (52) are both fixed to the top surface of the base (10) by screws, and the toggle clamp (51) is fixed to the top surface of the toggle clamp seat (52) by screws;

[0017] Holes distributed in rows are arranged on the square surface of the top surface of the base (10) except for the cavity opening, and are used for installing and adjusting the positioning plate (53) and the toggle clamp seat (52).

[0018] Furthermore, the testing fixture (60) comprises a pin (61), a frame (62) and a reference block (63);

[0019] The pin (61) is installed on the middle layer of the frame (62) by interference fit, and vertically passes through the through hole of the middle flange of the fixed inertia group (40). The reference block (63) is installed at the four corners of the bottom surface of the frame (62) by screws. After the reference block (63) contacts the positioning plate (53), the clamping head of the elbow clamp (51) is pulled to the bottom layer of the frame (62), so as to achieve the tightening and fixing of the test fixture (60).

[0020] Furthermore, the anti-collision shell (70) is made of a non-metallic material to ensure that it will not damage the surface of the inertial assembly (40).

[0021] Furthermore, the present invention also provides an assembly method of an inertial group and a test tool, comprising:

[0022] The first step is to place the test fixture (60) on the positioning plate (53) through the reference block (63), adjust the toggle clamp (51), and clamp the test fixture (60);

[0023] Step 2: The lifting platform (24) is set to an initial height E, and the lifting platform is adjusted to move it to at least a height of C+BK; wherein the inner depth of the crash shell is C, the total height of the test fixture is B, and the height between the plane where the inertial group is mounted on the test fixture and the bottom surface of the inertial group is K;

[0024] The third step is to place the inertial group (40) on the anti-collision shell (70);

[0025] Step 4: lower the lifting platform until the pin (61) is about to contact the inertia group (40);

[0026] Step 5: Push the inertia group (40) and align the pin (61) with the pin hole on the inertia group (40);

[0027] Step 6: Press down the inertia group (40) and pass the pin (61) through the pin hole on the inertia group (40);

[0028] Step 7: lower the lifting platform until the inertial assembly (40) is mounted on the mounting surface of the test fixture (60), and the two are fastened by screws;

[0029] Step 8: Open the toggle clamp (51), remove the inertial group (40) installed on the test fixture (60), and wait for the test experiment.

[0030] Furthermore, the present invention also provides a method for disassembling an inertial group and a test tool, comprising:

[0031] The first step is to place the test fixture (60) on the positioning plate (53) through the reference block (63), adjust the toggle clamp (51), and clamp the test fixture (60);

[0032] The second step is to remove the screws between the test fixture (60) and the inertia group 40;

[0033] Step 3: Set the lifting platform (24) to an initial height E, adjust the lifting platform (24) and move it to a height C; the inner depth of the anti-collision shell is C;

[0034] The fourth step is to push the anti-collision shell (70) and align the inertial group (40) with the anti-collision shell (70);

[0035] Step 5: Raise the lifting platform (24) and move it to a height of H+A, so that the pin (61) escapes from the inertia assembly (40);

[0036] Step 6: Continue to raise the lifting platform (24) and move it to a height of BHAK; the height of the pin on the test fixture is A, the total height of the test fixture is B, the height between the plane on which the inertia group is installed on the test fixture and the bottom surface of the inertia group is K; the relative height between the bottom surface of the inertia group and the bottom surface of the test fixture is H;

[0037] Step 7: Take out the habit group (40);

[0038] Step 8: Open the toggle clamp (51) and remove the test fixture (60).

[0039] 11. A design method for an assembly and disassembly positioning device for an inertial assembly and a test fixture according to any one of claims 1 to 8, characterized in that it comprises:

[0040] The first step is to set the pin height on the test fixture to A and the total height of the test fixture to B;

[0041] The second step is to set the height between the plane where the inertial group is installed on the test fixture and the bottom surface of the inertial group to be K;

[0042] The third step is to set the relative height between the bottom surface of the inertial group and the bottom surface of the test fixture to H when the inertial group is installed on the test fixture;

[0043] The fourth step is to set the inner depth of the anti-collision shell to C, the height between the bottom surface of the inner part of the anti-collision shell and the top surface of the lifting platform to D, the initial height of the lifting platform to E, the lifting displacement to F, and the height between the bottom surface of the inner part of the base and the top surface of the positioning plate to G;

[0044] Step 5, determining the first design constraint condition: after the guide shaft and the spring top seat are installed, the lifting stroke ≥ A is achieved;

[0045] Step 6, determine the second design constraint: according to the device design constraints D≥BK, G=E+D+C, F≥B-K+C, select and design the displacement module.

[0046] The beneficial effects of the present invention compared with the prior art are:

[0047] (1) The present invention can make the installation between the inertial module and the test tooling safer and more reliable, avoiding the risk of the inertial module falling off and being damaged due to the friction between the human hand and the inertial module;

[0048] (2) The present invention can make the disassembly between the inertial group and the test fixture safer, ensuring that the last step of disassembly after the inertial group test is completed is a stable and reliable operation;

[0049] (3) The present invention can be applied to various types of inertial groups, has good versatility, and saves design costs and manufacturing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0051] Figure 2 It is a cross-sectional view of the micro-motion module structure of the present invention.

[0052] Figure 3 It is a schematic diagram of the design method of the present invention. DETAILED DESCRIPTION

[0053] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0054] Inertial group testing is a key step in the production of inertial group products. If a safety problem occurs at this step, all previous production work will be wasted. At present, the installation and disassembly between the inertial group and the test tooling are all completed manually without the help of any external force, so there is a greater risk, and this step of installation and disassembly requires a high level of experience from the workers, further limiting the testing efficiency of the inertial group. In summary, the present invention not only solves the safety problem of installation and disassembly between the inertial group and the test tooling, but also takes into account the versatility of the invention, and can be applied to the testing of various models of inertial groups, saving production and manufacturing costs.

[0055] Figure 1 It is a schematic diagram of the overall structure of the present invention, Figure 2 It is a cross-sectional view of the micro-motion module structure of the present invention.

[0056] See also Figure 1 and Figure 2 , used for assembly and disassembly positioning device of inertial group and test fixture, including:

[0057] Base 10, displacement module 20, micro-motion module 30, inertial group 40, positioning module 50, test fixture 60 and anti-collision shell 70;

[0058] The base 10 is a square cavity structure, open upward and forward. The displacement module 20 is fixed in the cavity of the base 10, and is used to provide movement in the X and Y directions in the horizontal plane and movement in the vertical direction. The micro-motion module 30 is installed above the displacement module 20, and is used to provide a small displacement in the vertical direction; the test fixture 60 is fixed to the base 10 through the positioning module 50, and the lower end of the inertial group 40 assembled with the test fixture 60 is covered with an anti-collision shell 70, and the anti-collision shell 70 is fixed to the top of the micro-motion module 30.

[0059] The displacement module 20 includes a lifting platform 24, an adapter plate 23, an XY displacement platform 22 and a connecting plate 21;

[0060] The micro-motion module 30 includes a linear bearing 33, a guide shaft 32 and an elastic component 31;

[0061] There is a through hole on the left and right sides of the middle flange of the inertial group 40, which is used for installation and positioning with the test fixture 60;

[0062] The positioning module 50 includes a positioning plate 53, a toggle clamp seat 52 and a toggle clamp 51;

[0063] The test fixture 60 includes a pin 61, a frame 62 and a reference block 63;

[0064] The anti-collision shell 70 is made of non-metallic material to ensure that it will not damage the surface of the inertial group 40;

[0065] Furthermore, holes distributed in a row are provided on the top surface of the base 10 for installing the positioning plate 53 and the toggle clamp seat 52 .

[0066] Furthermore, the lifting platform 24 is fixed to the bottom of the cavity of the base 10 by screws, the adapter plate 23 is fixed to the lifting platform 24 by screws, the XY displacement table 22 is fixed to the adapter plate 23 by screws, and is used to provide XY displacement in the horizontal plane, and the connecting plate 21 is fixed to the XY displacement table 22 by screws; the micro-motion module 30 is installed on the lifting platform 24 through the connecting plate 21 to provide a small displacement in the vertical direction.

[0067] Furthermore, the elastic component 31 includes a spring top seat 311, a spring 312 and a spring base 313. The spring top seat 311 passes through the spring base 313 so that the flange of the spring top seat 311 is close to the top surface of the inner hole of the spring base 313, and then the spring 312 is placed in the inner hole of the spring top seat 311. The spring top seat 311 and the guide shaft 32 are both installed on the anti-collision shell 70 by screws, and the spring base 313 and the linear bearing 33 are both installed on the connecting plate 21 by screws.

[0068] The spring 312 is placed in the spring base 313 and the spring top seat 311, which will generate an initial compression. The force generated by the compression is recommended to be equivalent to the weight of the inertia group 40.

[0069] Further, according to the inertial assembly 40, the positioning plate 53 and the elbow clamp seat 52 are installed on the corresponding holes on the top surface of the base 10 by screws, and the elbow clamp 51 is installed on the elbow clamp seat 52 by screws. The elbow clamp 51 can clamp the frame 62 to fix the test fixture 60.

[0070] The positioning plate 53 and the toggle clamp seat 52 are both fixed to the top surface of the base 10 by screws, and the toggle clamp 51 is fixed to the top surface of the toggle clamp seat 52 by screws;

[0071] The square surface of the top surface of the base 10 other than the cavity opening is provided with holes distributed in a row for installing and adjusting the positioning plate 53 and the toggle clamp seat 52 .

[0072] The pin shaft 61 is installed on the middle layer of the frame 62 by interference fit, and vertically passes through the through hole of the middle flange of the fixed inertia group 40. The reference block 63 is installed on the four corners of the bottom surface of the frame 62 by screws. After the reference block 63 contacts the positioning plate 53, the clamping head of the elbow clamp 51 is moved to the bottom layer of the frame 62 to achieve the tightening and fixation of the test fixture 60.

[0073] like Figure 3 As shown, the present invention also proposes a design method for the assembly and disassembly positioning device of the above-mentioned inertial assembly and test tooling, and the specific steps are as follows:

[0074] In the first step, it is known that the height of the pin on the test fixture is A and the total height of the test fixture is B;

[0075] The second step is that the height between the plane on which the inertial group is mounted on the test fixture and the bottom surface of the inertial group is known to be K;

[0076] Step 3: It is known that when the inertial group is installed on the test fixture, the relative height between the bottom surface of the inertial group and the bottom surface of the test fixture is H;

[0077] Step 4: Set the inner depth of the anti-collision shell to C, the height between the bottom surface of the anti-collision shell and the top surface of the lifting platform to D, the initial height of the lifting platform to E, the lifting displacement to F, and the height between the bottom surface of the base and the top surface of the positioning plate to G;

[0078] Step 5: After the guide shaft and the spring top seat are installed, the lifting stroke should be ≥ A;

[0079] Step 6. According to the device design principle D≥BK, G=E+D+C, F≥B-K+C, select and design the displacement module.

[0080] The use process of the assembly and disassembly positioning device of the inertial group and the test fixture is as follows (taking the inertial group 40 and the test fixture 60 as an example):

[0081] (1) Installation process:

[0082] The first step is to place the test fixture 60 on the positioning plate 53 through the reference block 63, and adjust the toggle clamp 51 to clamp the test fixture 60;

[0083] Step 2: The lifting platform 24 is at an initial height E, and the lifting platform 24 is adjusted to move at least to a height of C+BK;

[0084] The third step is to place the inertial group 40 on the anti-collision shell 70;

[0085] Step 4: lower the lifting platform 24 until the pin 61 is about to contact the inertia assembly 40;

[0086] Step 5: Push the inertial group 40 and align the pin 61 with the pin hole on the inertial group 40;

[0087] Step 6: Press down the inertia group 40 and pass the pin 61 through the pin hole on the inertia group 40;

[0088] Step 7: lower the lifting platform 24 until the inertial group 40 is installed on the mounting surface of the test fixture 60, and fasten the two together with screws;

[0089] Step 8: Open the toggle clamp 51 and remove the inertial group 40 installed on the test fixture 60 to wait for the test experiment.

[0090] (2) Disassembly process:

[0091] The first step is to place the test fixture 60 on the positioning plate 53 through the reference block 63, and adjust the toggle clamp 51 to clamp the test fixture 60;

[0092] The second step is to remove the screws between the test fixture 60 and the inertial assembly 40;

[0093] Step 3: The lifting platform 24 is at an initial height E, and the lifting platform 24 is adjusted to move it to a height C;

[0094] Step 4: Push the crash shell 70 and align the inertial group 40 with the crash shell 70;

[0095] Step 5: Raise the lifting platform 24 and move it to a height of H+A, so that the pin 61 is out of the inertia assembly 40;

[0096] Step 6, continue to raise the lifting platform 24 and move it to the BHAK height;

[0097] Step 7: Take out the habit group 40 with both hands;

[0098] Step 8: open the toggle clamp 51 and remove the test fixture 60.

[0099] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

[0100] Parts of the present invention that are not described in detail belong to common knowledge among those skilled in the art.

Claims

1. A device for assembling and disassembling an inertial group and a test tool, characterized in that: include: A base (10), a displacement module (20), a micro-motion module (30), an inertial group (40), a positioning module (50), a test fixture (60) and an anti-collision shell (70); The base (10) is a square cavity structure, opening upward and forward. The displacement module (20) is fixed in the cavity of the base (10) and is used to provide movement in the X direction and the Y direction in the horizontal plane and movement in the vertical direction. The micro-motion module (30) is installed above the displacement module (20) and is used to provide micro-displacement in the vertical direction. The test fixture (60) is fixed on the base (10) through the positioning module (50). The lower end of the inertial group (40) assembled with the test fixture (60) is covered with an anti-collision shell (70), and the anti-collision shell (70) is fixed to the top of the micro-motion module (30). The positioning module (50) comprises a positioning plate (53), a toggle clamp seat (52) and a toggle clamp (51); The positioning plate (53) and the toggle clamp seat (52) are both fixed to the top surface of the base (10) by screws, and the toggle clamp (51) is fixed to the top surface of the toggle clamp seat (52) by screws; Holes distributed in rows are arranged on the square surface of the top surface of the base (10) except for the cavity opening, and are used for installing and adjusting the positioning plate (53) and the toggle clamp seat (52).

2. The assembly and disassembly positioning device for an inertial group and a test tool according to claim 1, characterized in that: The left and right sides of the middle flange of the inertial assembly (40) each have a through hole for installation and positioning with the test fixture (60).

3. The assembly and disassembly positioning device for an inertial group and a test tool according to claim 1, characterized in that: The displacement module (20) comprises a lifting platform (24), an adapter plate (23), an XY displacement platform (22) and a connecting plate (21); The lifting platform (24) is fixed to the bottom of the cavity of the base (10) by screws, the adapter plate (23) is fixed to the lifting platform (24) by screws, the XY displacement platform (22) is fixed to the adapter plate (23) by screws, and is used to provide XY displacement in the horizontal plane, and the connecting plate (21) is fixed to the XY displacement platform (22) by screws; the micro-motion module (30) is installed on the lifting platform (24) through the connecting plate (21) to provide micro displacement in the vertical direction.

4. The assembly and disassembly positioning device for an inertial group and a test tool according to claim 3, characterized in that: The micro-motion module (30) comprises a linear bearing (33), a guide shaft (32) and an elastic component (31); the elastic component (31) further comprises a spring top seat (311), a spring (312) and a spring base (313); The spring top seat (311) passes through the spring base (313), so that the flange of the spring top seat (311) is close to the top surface of the inner hole of the spring base (313), and then the spring (312) is placed in the inner hole of the spring top seat (311). The spring top seat (311) and the guide shaft (32) are both installed on the anti-collision shell (70) by screws, and the spring base (313) and the linear bearing (33) are both installed on the connecting plate (21) by screws.

5. The assembly and disassembly positioning device for an inertial group and a test tool according to claim 4, characterized in that: When the spring (312) is placed in the spring base (313) and the spring top seat (311), an initial compression will be generated, and the force generated by the compression is equivalent to the weight of the inertia group (40).

6. The assembly and disassembly positioning device for an inertial group and a test tool according to claim 1, characterized in that: The testing fixture (60) comprises a pin (61), a frame (62) and a reference block (63); The pin (61) is installed on the middle layer of the frame (62) by interference fit, and vertically passes through the through hole of the middle flange of the fixed inertia group (40). The reference block (63) is installed at the four corners of the bottom surface of the frame (62) by screws. After the reference block (63) contacts the positioning plate (53), the clamping head of the elbow clamp (51) is pulled to the bottom layer of the frame (62), so as to achieve the tightening and fixing of the test fixture (60).

7. The assembly and disassembly positioning device for an inertial group and a test tool according to claim 1, characterized in that: The anti-collision shell (70) is made of non-metallic material to ensure that it will not damage the surface of the inertial assembly (40).

8. An assembly method of an inertial group and a test fixture implemented by the assembly and disassembly positioning device for an inertial group and a test fixture according to claim 6, characterized in that include: The first step is to place the test fixture (60) on the positioning plate (53) through the reference block (63), adjust the toggle clamp (51), and clamp the test fixture (60); Step 2: The lifting platform (24) is set to an initial height E, and the lifting platform is adjusted to move it to at least a height of C+BK; wherein the inner depth of the crash shell is C, the total height of the test fixture is B, and the height between the plane where the inertial group is mounted on the test fixture and the bottom surface of the inertial group is K; The third step is to place the inertial group (40) on the anti-collision shell (70); Step 4: lower the lifting platform until the pin (61) is about to contact the inertia group (40); Step 5: Push the inertia group (40) and align the pin (61) with the pin hole on the inertia group (40); Step 6: Press down the inertia group (40) and pass the pin (61) through the pin hole on the inertia group (40); Step 7: lower the lifting platform until the inertial assembly (40) is mounted on the mounting surface of the test fixture (60), and the two are fastened by screws; Step 8: Open the toggle clamp (51), remove the inertial group (40) installed on the test fixture (60), and wait for the test experiment.

9. A method for disassembling an inertial group and a test fixture using the assembly and disassembly positioning device for an inertial group and a test fixture according to claim 6, characterized in that include: The first step is to place the test fixture (60) on the positioning plate (53) through the reference block (63), adjust the toggle clamp (51), and clamp the test fixture (60); The second step is to remove the screws between the test fixture (60) and the inertia group 40; Step 3: Set the lifting platform (24) to an initial height E, adjust the lifting platform (24) and move it to a height C; the inner depth of the anti-collision shell is C; The fourth step is to push the anti-collision shell (70) and align the inertial group (40) with the anti-collision shell (70); Step 5: Raise the lifting platform (24) and move it to a height of H+A, so that the pin (61) escapes from the inertia assembly (40); Step 6: Continue to raise the lifting platform (24) and move it to a height of BHAK; the height of the pin on the test fixture is A, the total height of the test fixture is B, the height between the plane on which the inertia group is installed on the test fixture and the bottom surface of the inertia group is K; the relative height between the bottom surface of the inertia group and the bottom surface of the test fixture is H; Step 7: Take out the habit group (40); Step 8: Open the toggle clamp (51) and remove the test fixture (60).

10. A design method for the assembly and disassembly positioning device for an inertial group and a test tool as claimed in claim 5, characterized in that include: The first step is to set the pin height on the test fixture to A and the total height of the test fixture to B; The second step is to set the height between the plane where the inertial group is installed on the test fixture and the bottom surface of the inertial group to be K; The third step is to set the relative height between the bottom surface of the inertial group and the bottom surface of the test fixture to H when the inertial group is installed on the test fixture; The fourth step is to set the inner depth of the anti-collision shell to C, the height between the bottom surface of the inner part of the anti-collision shell and the top surface of the lifting platform to D, the initial height of the lifting platform to E, the lifting displacement to F, and the height between the bottom surface of the inner part of the base and the top surface of the positioning plate to G; Step 5, determining the first design constraint condition: after the guide shaft and the spring top seat are installed, the lifting stroke ≥ A is achieved; Step 6, determine the second design constraint: according to the device design constraints D≥BK, G=E+D+C, F≥B-K+C, select and design the displacement module.

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