Line drawing fixture for tube-in-line positioning

Abstract

The utility model relates to unmanned aerial vehicle manufacturing technical field provides a kind of line drawing fixture for pipe in line positioning, the fixture includes first slide rail, second slide rail, first limit plate, third slide rail, second limit plate and marker pen.The line drawing fixture provided by the utility model, by setting first slide rail and second slide rail parallel to each other, first limit plate is fixed between first slide rail and second slide rail;Third slide rail is slidably connected to first slide rail and second slide rail along the first direction, second limit plate is provided on third slide rail, and clamping area is formed;Marker pen is slidably connected to third slide rail along second direction again, when the pipe to be drawn line is clamped, the nib of marker pen is located on the center line of clamping area along second direction, the nib of marker pen is in abutment with the outer wall of the pipe to be drawn line along third direction, to realize drawing pipe in line to the pipe to be drawn line;It is simple to operate, reduces artificial dependence degree, and line drawing efficiency is higher, so that the positioning line drawing of pipe in line is more accurate and higher in accuracy.

Description

Technical Field

[0001] This utility model relates to the field of unmanned aerial vehicle (UAV) manufacturing technology, specifically to a marking fixture for pipe centerline positioning. Background Technology

[0002] When manufacturing drones, it is necessary to install irregularly shaped tubes with planar curves such as S-shaped or Z-shaped axes, for example, circular carbon fiber tubes. These circular carbon fiber tubes are typically installed on the drone's arms. If it cannot be ensured that the axis of this irregularly shaped tube is coaxial with the axis of the arm's folding components or the power sleeve, the tube cannot be installed correctly. This will have a very adverse effect on the drone's power and control, leading to reduced drone performance and increasing the risk of crashes.

[0003] To solve the above problems, people usually mark the center line of the tube on the surface of the tube before installation. For example, the diameter of the tube is measured manually and then the line is drawn for positioning, so that the tube is positioned more accurately on the machine arm.

[0004] However, the relevant line drawing techniques rely heavily on manual measurement and positioning, resulting in low accuracy, low efficiency, and difficult operation. Utility Model Content

[0005] In view of the above-mentioned defects in the prior art, the present invention provides a marking fixture for positioning the centerline of a pipe, which solves at least one of the above-mentioned technical defects in the prior art, making the positioning and marking of the centerline of the pipe more accurate and precise, and reducing the dependence on manual labor, making the operation simpler and the marking efficiency higher.

[0006] To achieve the purpose of this utility model, this utility model provides a marking clamp for positioning the centerline of a pipe, comprising:

[0007] First slide rail;

[0008] The second slide rail is arranged parallel to the first slide rail;

[0009] The first limiting plate is fixed between the first slide rail and the second slide rail;

[0010] The third slide rail is slidably connected to the first slide rail and the second slide rail along the first direction.

[0011] A second limiting plate is disposed on the third slide rail, and a clamping area is formed between the second limiting plate and the first limiting plate. The clamping area is suitable for clamping the tube to be drawn.

[0012] The marker pen is slidably connected to the third slide rail along the second direction.

[0013] When the clamping area clamps the tube to be drawn, the tip of the marking pen is located on the center line of the clamping area along the second direction. Under the action of gravity or external force, the tip of the marking pen abuts against the outer wall of the tube to be drawn along the third direction.

[0014] Preferably, it also includes a first slide and a second slide.

[0015] The first slide block is slidably connected to the first slide rail along a first direction, and the second slide block is slidably connected to the second slide rail along the first direction.

[0016] The first end of the third slide rail is fixed to the first slide block, and the second end of the third slide rail is fixed to the second slide block.

[0017] Preferably, the first slide is provided with a first locking element, and the second slide is provided with a second locking element.

[0018] The first locking element is adapted to control the locking or unlocking of the first slide block and the first slide rail.

[0019] The second locking element is adapted to control the locking or unlocking of the second slide block and the second slide rail.

[0020] Preferably, it also includes a third slide and a marking slider.

[0021] The third slide block is slidably connected to the third slide rail along the second direction.

[0022] The marking pen is disposed on the marking slider, and the marking slider is slidably connected to the third slide block along the first direction.

[0023] Preferably, the third slide includes a third slide body and a marking base.

[0024] The third slide body is slidably connected to the third slide rail along the second direction, and the marking base is fixed to the third slide body.

[0025] The marker slider is slidably connected to the marker base along the first direction.

[0026] Preferably, it also includes an adapter, the adapter comprising a first adapter plate and a second adapter plate that are perpendicularly connected to each other.

[0027] The length direction of the first adapter plate is parallel to the first direction, and the length direction of the second adapter plate is parallel to the third direction.

[0028] The first adapter plate is fixed to the marking slider, and the marking pen is slidably connected to the second adapter plate along a third direction.

[0029] Preferably, it also includes a pen clip, which is slidably connected to the second adapter plate along a third direction.

[0030] The marking pen is fixed to the pen clip.

[0031] Preferably, it also includes a rotary locking element.

[0032] The rotary locking element is located on the marker slider and is adapted to control the locking or unlocking of the marker slider and the marker base.

[0033] Preferably, it also includes a first base, a second base, a third base, and a fourth base.

[0034] The first base is fixed to the first end of the first slide rail, and the second base is fixed to the second end of the first slide rail.

[0035] The third base is fixed to the first end of the second slide rail, and the fourth base is fixed to the second end of the second slide rail.

[0036] Preferably, it also includes a first pad, a second pad, a third pad, and a limiting base plate.

[0037] The first end of the limiting base plate is fixed to the first end of the first slide rail, and the second end of the limiting base plate is fixed to the first end of the second slide rail.

[0038] The first pad is fixed to the limiting base plate, with a first end of the first pad located between the first base and the first end of the limiting base plate, and a second end of the first pad located between the third base and the second end of the limiting base plate.

[0039] The second pad is disposed between the second end of the first slide rail and the second base, and the third pad is disposed between the second end of the second slide rail and the fourth base.

[0040] The beneficial effects of this utility model are as follows: The marking clamp for positioning the centerline of a pipe provided by this utility model is configured with a first and a second parallel slide rail, with a first limiting plate fixed between the first and the second slide rail; a third slide rail is slidably connected to the first and second slide rails along a first direction, and a second limiting plate is provided on the third slide rail, so that a clamping area suitable for clamping the pipe to be marked is formed between the first and the second limiting plates; a marking pen is slidably connected to the third slide rail along a second direction, so that when the clamping area clamps the pipe to be marked, the tip of the marking pen is located on the center line of the clamping area along the second direction. Under the action of gravity or external force, the tip of the marking pen abuts against the outer wall of the pipe to be marked along the third direction, so as to realize the drawing of the centerline of the pipe; the operation is simple, the dependence on manual labor is reduced, the drawing efficiency is higher, and the positioning and drawing of the centerline of the pipe is more accurate and precise. Attached Figure Description

[0041] The above and other objects, features, and advantages of this utility model will become clearer through a more detailed description of the preferred embodiments shown in the accompanying drawings. The same reference numerals indicate the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of this application.

[0042] Figure 1 A schematic diagram of the overall structure of a marking clamp for positioning the centerline of a pipe provided in an embodiment of this utility model;

[0043] Figure 2 for Figure 1 A structural diagram from another perspective;

[0044] Figure 3 This is a partially enlarged schematic diagram of the third slide rail, marking pen, adapter, and second slide block in the marking fixture for positioning the centerline of a pipe provided in this embodiment of the utility model.

[0045] 1. The pipe to be drawn;

[0046] 100. First slide rail; 110. First slide block; 111. First locking element;

[0047] 200. Second slide rail; 210. Second slide block; 211. Second locking element;

[0048] 300. First limit plate;

[0049] 400. Third slide rail; 410. Third slide block; 411. Third slide block body; 412. Marker base; 420. Marker slider;

[0050] 500. Second limiting plate; 501. Clamping area;

[0051] 600. Marking pen; 610. Pen clip; 620. Rotary lock;

[0052] 700. Adapter; 710. First adapter plate; 720. Second adapter plate;

[0053] 810. First base; 820. Second base; 830. Third base; 840. Fourth base;

[0054] 910. First pad; 920. Second pad; 930. Third pad; 940. Limiting base plate; 950. Short base. Detailed Implementation

[0055] To facilitate understanding of this utility model, a more comprehensive description of this utility model will be given below with reference to the accompanying drawings.

[0056] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0057] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this applies. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0058] The following is combined with Figures 1 to 3 The embodiments of this utility model will be described below. It should be understood that the following description is merely an illustrative embodiment of this utility model and does not constitute any limitation on this utility model.

[0059] To more clearly illustrate the orientation of each component in the marking fixture for pipe centerline positioning provided in this embodiment of the invention, combined with... Figures 1 to 3 Establish a three-dimensional coordinate system XYZ, with the X-axis as the first direction, the Y-axis as the second direction, and the Z-axis as the third direction.

[0060] Combination Figures 1 to 3 The present invention provides a marking fixture for positioning the centerline of a pipe, comprising a first slide rail 100, a second slide rail 200, a first limiting plate 300, a third slide rail 400, a second limiting plate 500, and a marking pen 600.

[0061] The second slide rail 200 is arranged parallel to the first slide rail 100. The length of both the first slide rail 100 and the second slide rail 200 can extend along a first direction, which is the direction of the X-axis.

[0062] The first limiting plate 300 is fixed between the first slide rail 100 and the second slide rail 200. For example, the first end of the first limiting plate 300 is fixed to the first end of the first slide rail 100, the second end of the first limiting plate 300 is fixed to the second end of the first slide rail 100, and the length direction of the first limiting plate 300 can extend along a second direction, which is perpendicular to the first direction and is the direction where the Y-axis is located.

[0063] The third slide rail 400 is slidably connected to the first slide rail 100 and the second slide rail 200 along the first direction, that is, the third slide rail 400 can slide on the first slide rail 100 and the second slide rail 200.

[0064] The second limiting plate 500 is fixed on the third slide rail 400. The length direction of the second limiting plate 500 extends along the second direction. A clamping area 501 is formed between the second limiting plate 500 and the first limiting plate 300. The clamping area 501 can clamp the tube 1 to be drawn.

[0065] When the third slide rail 400 is in the negative direction of the first direction (i.e. Figure 2 When sliding in the negative direction of the X-axis, the space of the clamping area 501 becomes smaller, so that the second limiting plate 500 and the first limiting plate 300 can clamp the tube 1 to be drawn placed in the clamping area 501.

[0066] The marker pen 600 slides along the second direction and is connected to the third slide rail 400.

[0067] When the clamping area 501 clamps the tube 1 to be drawn, the tip of the marker pen 600 is located on the center line of the clamping area 501 along the second direction. Under the action of gravity or external force, the tip of the marker pen 600 moves along the third direction (i.e. Figure 3 In the middle, the direction of the Z-axis is in contact with the outer wall of the tube 1 to be drawn. After the marker pen 600 slides along the third slide rail 400, it can draw a marker line on the outer wall of the tube 1 to be drawn.

[0068] By operating the third slide rail 400 to slide in the negative direction of the first direction, and by having the tip of the marker pen 600 contact the tube 1 to be marked along the third direction and operating the marker pen 600 to slide along the second direction, the marking line (i.e. the tube center line) of the tube can be marked. The positioning and drawing of the tube center line is more accurate and precise, and it can reduce the dependence on manual labor, make the operation simpler, and make the drawing efficiency higher.

[0069] Since the tip of the marker pen 600 is located on the center line of the clamping area 501 along the second direction, the marking line is the center line of the tube 1 to be drawn, which provides a more accurate reference positioning line for the subsequent installation of the tube on the drone's arm. This is beneficial for the accurate positioning of the irregularly shaped arm during drone assembly and improves the drone's power performance and safety.

[0070] It is understood that the marking clamp for positioning the centerline of a pipe provided in the embodiments of this utility model comprises a first slide rail 100 and a second slide rail 200 that are parallel to each other, with a first limiting plate 300 fixed between the first slide rail 100 and the second slide rail 200; a third slide rail 400 is slidably connected to the first slide rail 100 and the second slide rail 200 along a first direction, and a second limiting plate 500 is provided on the third slide rail 400, so that a suitable space is formed between the first limiting plate 300 and the second limiting plate 500 for clamping the pipe to be marked. The clamping area 501 of tube 1 is provided; a marker pen 600 is then provided and slidably connected to the third slide rail 400 along the second direction. When the clamping area 501 clamps the tube 1 to be drawn, the tip of the marker pen 600 is located on the center line of the clamping area 501 along the second direction. Under the action of gravity or external force, the tip of the marker pen 600 abuts against the outer wall of the tube 1 to be drawn along the third direction, so as to realize the drawing of the tube center line of the tube 1. The operation is simple, the dependence on manual labor is reduced, the drawing efficiency is higher, and the positioning and drawing of the tube center line is more accurate and precise.

[0071] Specifically, in combination Figure 1 In some embodiments of this utility model, the marking fixture for positioning the centerline of the pipe further includes a first slide 110 and a second slide 210.

[0072] The first slide block 110 is slidably connected to the first slide rail 100 along the first direction, and the second slide block 210 is slidably connected to the second slide rail 200 along the first direction.

[0073] The first end of the third slide rail 400 is fixed to the first slide block 110, and the second end of the third slide rail 400 is fixed to the second slide block 210. This simplifies the structure of the fixture and allows the two ends of the third slide rail 400 to slide more stably to the first slide rail 100 and the second slide rail 200, respectively, ensuring the smooth movement of the marker pen 600 and further improving accuracy.

[0074] In addition, combined Figure 1 In order to ensure that the marker pen 600 can be accurately held on the center line of the clamping area 501 along the second direction, the position of the marker pen 600 can be adjusted and locked. In some embodiments of this utility model, the first slide 110 is provided with a first locking member 111, and the second slide 210 is provided with a second locking member 211.

[0075] The first locking member 111 controls the locking or unlocking of the first slide block 110 and the first slide rail 100. For example, when the first locking member 111 is in the locked state, it passes through the first slide block 110 and abuts against the first slide rail 100, locking the first slide block 110 to the first slide rail 100, preventing it from sliding along the first slide rail 100 in the first direction. When the first locking member 111 is in the unlocked state, it disengages from the first slide rail 100, allowing the first slide block 110 to slide along the first slide rail 100 in the first direction.

[0076] The second locking member 211 can control the locking or unlocking of the second slide block 210 and the second slide rail 200. For example, when the second locking member 211 is in the locked state, it passes through the second slide block 210 and abuts against the second slide rail 200, locking the second slide block 210 to the second slide rail 200, preventing it from sliding along the second slide rail 200 in the first direction. When the second locking member 211 is in the unlocked state, it disengages from the second slide rail 200, allowing the second slide block 210 to slide along the second slide rail 200 in the first direction.

[0077] Combination Figure 2 and Figure 3 In some embodiments of this utility model, the marking fixture for positioning the centerline of the pipe also includes a third slide 410 and a marking slider 420.

[0078] The third slide block 410 is slidably connected to the third slide rail 400 along the second direction.

[0079] A marker pen 600 is mounted on a marker slider 420, which is slidably connected to a third slide block 410 along a first direction. When the clamping area 501 clamps the tube 1 to be drawn, the tip of the marker pen 600 can move along the first direction to adjust to the center line of the clamping area 501. The tip of the marker pen 600 can also slide along a second direction, moving along the center line of the tube 1 to be drawn placed in the clamping area 501, thereby enabling drawing lines on the outer wall of the tube 1 to be drawn, making the operation more convenient and the drawing more accurate.

[0080] Specifically, in combination Figure 3 In some embodiments of this utility model, the third slide 410 includes a third slide body 411 and a marking base 412.

[0081] The third slide body 411 is slidably connected to the third slide rail 400 along the second direction, and the marking base 412 is fixed on the third slide body 411.

[0082] The marker slider 420 is slidably connected to the marker base 412 along the first direction, making the sliding of the marker slider 420 along the first direction more stable, thereby ensuring the stability of the marker pen 600 in drawing lines on the tube 1 to be drawn.

[0083] Combination Figure 3 In some embodiments of this utility model, in order to better fix the marker pen 600 on the marker slider 420 and avoid affecting the sliding movement of the marker pen 600 along a third direction, the marking fixture for pipe centerline positioning also includes an adapter 700, which includes a first adapter plate 710 and a second adapter plate 720 that are perpendicularly connected to each other. For example, the adapter 700 is L-shaped.

[0084] The length direction of the first adapter plate 710 is parallel to the first direction (i.e., attached). Figure 3 The direction of the X-axis in the diagram), the length direction of the second adapter plate 720 is parallel to the third direction (i.e., the attached direction). Figure 3 (The direction of the Z-axis in the diagram).

[0085] The first adapter plate 710 is fixed on the marking slider 420, and the marking pen 600 is slidably connected to the second adapter plate 720 along the third direction.

[0086] Furthermore, combined Figure 3 In some embodiments of this utility model, the drawing clamp for positioning the centerline of the pipe further includes a pen clamp 610. The pen clamp 610 is slidably connected to the second adapter plate 720 along a third direction.

[0087] The marker pen 600 is fixed to the pen clip 610.

[0088] For example, a marking groove is provided on the second adapter plate 720 along a third direction, and a pen slider is provided on the pen clamp 610, which is slidably connected to the marking groove. The structure is simpler, allowing the marking pen 600 to abut against the tube 1 to be drawn in the clamping area 501 along a third direction under the action of gravity or external force.

[0089] Of course, combined Figure 3 In some embodiments of this utility model, the marking fixture for positioning the centerline of the pipe also includes a rotary locking member 620.

[0090] A rotating locking element 620 is provided on the marker slider 420, which can control the locking or unlocking between the marker slider 420 and the marker base 412.

[0091] When the rotary locking member 620 is in the locked state, it passes through the marker slider 420 and abuts against the marker base 412, locking the marker slider 420 to the marker base 412 and preventing it from sliding along the first direction. When the rotary locking member 620 is in the unlocked state, it disengages from the marker base 412, allowing the marker slider 420 to slide along the first direction. This allows the sliding movement of the marker pen 600 in the first direction to be locked or unlocked, meaning the position of the marker pen 600 in the first direction can be adjusted, thereby improving the flexibility and positioning accuracy of the marker pen 600.

[0092] Combination Figure 1 To improve the structural stability of the marking clamp, in some embodiments of this utility model, the marking clamp for positioning the centerline of the pipe further includes a first base 810, a second base 820, a third base 830, and a fourth base 840. The first base 810, the second base 820, the third base 830, and the fourth base 840 can all be C-shaped angle members.

[0093] The first base 810 is fixed to the first end of the first slide rail 100, and the second base 820 is fixed to the second end of the first slide rail 100.

[0094] The third base 830 is fixed to the first end of the second slide rail 200, and the fourth base 840 is fixed to the second end of the second slide rail 200.

[0095] In addition, combined Figure 1 In some embodiments of this utility model, the marking fixture for positioning the centerline of the pipe further includes a first pad 910, a second pad 920, a third pad 930, and a limiting base plate 940.

[0096] The first end of the limiting base plate 940 is fixed to the first end of the first slide rail 100, and the second end of the limiting base plate 940 is fixed to the first end of the second slide rail 200.

[0097] The first pad 910 is fixed to the limiting base plate 940. The first end of the first pad 910 is located between the first base 810 and the first end of the limiting base plate 940, and the second end of the first pad 910 is located between the third base 830 and the second end of the limiting base plate 940.

[0098] The second pad 920 is disposed between the second end of the first slide rail 100 and the second base 820, and the third pad 930 is disposed between the second end of the second slide rail 200 and the fourth base 840, so that the first slide rail 100 and the second slide rail 200 are at the same height in the horizontal plane.

[0099] Of course, multiple short bases 950 can also be provided on the first pad 910. The short bases 950 are evenly arranged on the first side of the first pad 910, which can increase the rigidity of the first pad 910.

[0100] In this specification, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0101] In the description of this specification, the use of terms such as "preferred embodiment," "another embodiment," "some embodiments," "other embodiments," or "specific example," etc., refers to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0102] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A scribe fixture for wire-in-pipe positioning, characterized by, include: First slide rail; The second slide rail is arranged parallel to the first slide rail; The first limiting plate is fixed between the first slide rail and the second slide rail; The third slide rail is slidably connected to the first slide rail and the second slide rail along the first direction. A second limiting plate is disposed on the third slide rail, and a clamping area is formed between the second limiting plate and the first limiting plate. The clamping area is suitable for clamping the tube to be drawn. The marker pen is slidably connected to the third slide rail along the second direction. When the clamping area clamps the tube to be drawn, the tip of the marking pen is located on the center line of the clamping area along the second direction. Under the action of gravity or external force, the tip of the marking pen abuts against the outer wall of the tube to be drawn along the third direction.

2. The scribe fixture for wire-in-pipe location of claim 1, wherein, It also includes the first slide and the second slide. The first slide block is slidably connected to the first slide rail along a first direction, and the second slide block is slidably connected to the second slide rail along the first direction. The first end of the third slide rail is fixed to the first slide block, and the second end of the third slide rail is fixed to the second slide block.

3. The scribe fixture for wire-in-pipe location of claim 2, wherein, The first slide block is equipped with a first locking element, and the second slide block is equipped with a second locking element. The first locking element is adapted to control the locking or unlocking of the first slide block and the first slide rail. The second locking element is adapted to control the locking or unlocking of the second slide block and the second slide rail.

4. The scribe fixture for wire-in-pipe location of claim 1, wherein, It also includes a third slide and a marker slider. The third slide block is slidably connected to the third slide rail along the second direction. The marking pen is disposed on the marking slider, and the marking slider is slidably connected to the third slide block along the first direction.

5. The scribe fixture for wire-in-pipe location according to claim 4, wherein, The third slide includes a third slide body and a marking base. The third slide body is slidably connected to the third slide rail along the second direction, and the marking base is fixed to the third slide body. The marker slider is slidably connected to the marker base along the first direction.

6. The scribe fixture for wire-in-pipe location according to claim 5, wherein, It also includes an adapter, which comprises a first adapter plate and a second adapter plate that are perpendicularly connected to each other. The length direction of the first adapter plate is parallel to the first direction, and the length direction of the second adapter plate is parallel to the third direction. The first adapter plate is fixed to the marking slider, and the marking pen is slidably connected to the second adapter plate along a third direction.

7. The scribe fixture for wire-in-pipe location according to claim 6, wherein, It also includes a pen clip, which is slidably connected to the second adapter plate along a third direction. The marking pen is fixed to the pen clip.

8. The scribe fixture for wire-in-pipe location according to claim 7, wherein, It also includes rotary locking components, The rotary locking element is located on the marker slider and is adapted to control the locking or unlocking of the marker slider and the marker base.

9. The scribe fixture for wire-in-pipe location of claim 1, wherein, It also includes the first base, the second base, the third base, and the fourth base. The first base is fixed to the first end of the first slide rail, and the second base is fixed to the second end of the first slide rail. The third base is fixed to the first end of the second slide rail, and the fourth base is fixed to the second end of the second slide rail.

10. The scribe fixture for wire-in-pipe location according to claim 9, wherein, It also includes a first pad, a second pad, a third pad, and a limiting base plate. The first end of the limiting base plate is fixed to the first end of the first slide rail, and the second end of the limiting base plate is fixed to the first end of the second slide rail. The first pad is fixed to the limiting base plate, with a first end of the first pad located between the first base and the first end of the limiting base plate, and a second end of the first pad located between the third base and the second end of the limiting base plate. The second pad is disposed between the second end of the first slide rail and the second base, and the third pad is disposed between the second end of the second slide rail and the fourth base.

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