A quartz boat welding positioning mold

Abstract

The utility model provides a quartz boat welding positioning mold, which belongs to the field of welding positioning technology; the quartz boat welding positioning mold includes: a mounting plate, a first fixed plate, a first positioning pin, a support plate, a support groove, a positioning plate, a mounting groove, a lead screw, a second fixed plate and a second positioning pin; two reinforcing rods are positioned by two supporting plates, two positioning plates are positioned for two placement rods, and the first fixed plate is positioned for a top plate, so as to improve the relative position accuracy of the two reinforcing rods, the two placement rods and a top plate, thereby improving the accuracy of processing the quartz boat and improving the efficiency of welding the quartz boat. The second fixed plate is positioned for another top plate, and the lead screw drives the second fixed plate and another top plate to move, so as to adjust the distance between the two top plates.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding positioning, and in particular relates to a quartz boat welding positioning mold. Background Art

[0002] In the related technology, the quartz boat is a carrier for silicon wafers during diffusion, oxidation and other processes.

[0003] In the prior art, Figure 1 As shown, the quartz boat is composed of two top plates 10', two placement rods 11' and two reinforcement rods 13' welded together; wherein, the placement rods 11' are provided with placement grooves 12', through which the silicon wafers are accommodated; and the top plate 10' is provided with positioning holes 14'.

[0004] During the welding process, the worker needs to fix the top plate 10', the placement rod 11' and the reinforcement rod 13' by hand, and at the same time, he needs to operate the welding equipment to weld the top plate 10', the placement rod 11' and the reinforcement rod 13' together. Such operation not only reduces the precision of processing the quartz boat, but also reduces the efficiency of welding the quartz boat. Utility Model Content

[0005] In order to solve the problem in the above-mentioned prior art that the top plate, placement rods and reinforcing rods need to be fixed by hand, and at the same time, welding equipment needs to be operated to weld the top plate, placement rods and reinforcing rods together, thereby reducing the precision of processing the quartz boat and reducing the efficiency of welding the quartz boat, the utility model provides a quartz boat welding positioning mold, which uses two support plates to position two reinforcing rods, two positioning plates to position two placement rods, and a first fixed plate to position a top plate, so as to improve the relative position accuracy of two reinforcing rods, two placement rods and a top plate, thereby improving the precision of processing the quartz boat and improving the efficiency of welding the quartz boat. Its specific technical scheme is:

[0006] A quartz boat welding positioning mold, the quartz boat welding positioning mold comprises: a mounting plate, a first fixing plate, a first positioning pin, a supporting plate, a supporting groove, a positioning plate, a mounting groove, a lead screw, a second fixing plate and a second positioning pin; a receiving groove is arranged on the top of the mounting plate; the first fixing plate is embedded in the receiving groove, and the first fixing plate is connected to the end of the mounting plate; two first positioning pins are connected to the first fixing plate; two supporting plates are embedded in the receiving groove, and the two supporting plates are connected to the mounting plate; two supporting grooves are arranged on the top of the supporting plate; two positioning plates are embedded in the receiving groove, the two positioning plates are connected to the mounting plate, and the two positioning plates are located between the two supporting plates; the mounting groove is arranged at the bottom of the mounting plate; an external thread is arranged on the outer wall of the lead screw, the lead screw is embedded in the mounting groove, and the lead screw is rotatably connected to the mounting plate; a threaded hole is arranged in the second fixing plate, an internal thread is arranged in the threaded hole, at least part of the second fixing plate is embedded in the mounting groove, and the lead screw passes through the threaded hole of the second fixing plate; two second positioning pins are connected to the second fixing plate; wherein the external thread is adapted to the internal thread.

[0007] In addition, the quartz boat welding positioning mold in the above technical solution provided by the utility model may also have the following additional technical features:

[0008] In the above technical solution, the quartz boat welding positioning mold also includes: a limit groove and a limit rod; the two limit grooves are arranged on both sides of the mounting plate; the two limit rods are respectively connected to the two sides of the second fixed plate, and the two limit rods pass through the two limit grooves respectively.

[0009] In the above technical solution, the quartz boat welding positioning mold also includes: a handwheel; the handwheel is connected to the lead screw, and the handwheel is located on the outside of the mounting plate.

[0010] In the above technical scheme, the quartz boat welding positioning mold also includes: a first placing table and a second placing table; the first placing table is connected to the side of the first fixed plate close to the support plate, and the first placing table is located below the two first positioning pins; the second placing table is connected to the side of the second fixed plate close to the support plate, and the second placing table is located below the two second positioning pins; wherein, the first placing table and the first fixed plate are an integrated structure, and the second placing table and the second fixed plate are an integrated structure.

[0011] In the above technical scheme, the quartz boat welding positioning mold also includes: a clamping plate, a spring and a buffer pad; the clamping plate is located on the side of the first fixed plate close to the support plate; one end of the spring is connected to the first fixed plate, and the other end of the spring is connected to the clamping plate; the buffer pad is an elastomer, and the buffer pad is connected to the side of the clamping plate close to the first fixed plate.

[0012] In the above technical solution, the quartz boat welding positioning mold also includes: a guide rod and a limit plate; one end of the guide rod is connected to the first fixed plate, and the other end of the guide rod passes through the spring and the clamping plate in sequence; the limit plate is connected to the other end of the guide rod.

[0013] Compared with the prior art, the quartz boat welding positioning mold of the utility model has the following beneficial effects:

[0014] 1. Position the two reinforcing rods through two support plates, position the two placement rods through two positioning plates, and position the top plate through the first fixed plate, so as to improve the relative position accuracy of the two reinforcing rods, the two placement rods and one top plate, thereby improving the accuracy of processing the quartz boat and improving the efficiency of welding the quartz boat. Position the other top plate through the second fixed plate, and drive the second fixed plate and the other top plate to move with the lead screw to adjust the distance between the two top plates, so that when the reinforcing rods and the placement rods are welded to the top plate positioned on the first fixed plate, there is enough space between the top plate positioned on the second fixed plate and the reinforcing rods and the placement rods, so as to improve the product use experience. At the same time, the lead screw can be rotated to drive the second fixed plate and the top plate to move toward the first fixed plate, so as to achieve the top plate and the reinforcing rods and the placement rods fit together, so as to facilitate welding the reinforcing rods and the placement rods to the top plate.

[0015] 2. By setting two limit grooves on both sides of the mounting plate, connecting the two limit rods to the two sides of the second fixed plate respectively, and passing the two limit rods through the two limit grooves respectively, the second fixed plate can be limited to move along the limit grooves, thereby avoiding the second fixed plate from shifting during movement, so as to improve the stability of the movement of the second fixed plate.

[0016] 3. By connecting the handwheel to the lead screw and placing the handwheel on the outside of the mounting plate, the handwheel can be turned to drive the lead screw to rotate, thereby reducing the difficulty of the lead screw and improving the user experience of the product.

[0017] 4. By connecting the first placing platform with the side of the first fixing plate close to the supporting plate, and making the first placing platform below the two first positioning pins, it is possible to place the top plate on the first placing platform when the first positioning pin passes through the positioning hole of the top plate, thereby improving the stability of the top plate; by connecting the second placing platform with the side of the second fixing plate close to the supporting plate, and making the second placing platform below the two second positioning pins, it is possible to place the top plate on the second placing platform when the second positioning pin passes through the positioning hole of the top plate, thereby improving the stability of the top plate.

[0018] 5. Before embedding the first positioning pin into the positioning hole of the top plate, pull the clamping plate to increase the distance between the clamping plate and the first fixing plate, so as to facilitate positioning the first positioning pin on the top plate; at this time, the spring is in a stretched state; then, release the clamping plate, and the spring is reset, so that the clamping plate fits with the top plate through the buffer pad to improve the stability of the top plate.

[0019] 6. By connecting one end of the guide rod with the first fixed plate, and passing the other end of the guide rod through the spring and the clamping plate in sequence, the clamping plate can be moved along the guide rod, thereby avoiding the displacement of the clamping plate during movement, so as to improve the stability of the movement of the clamping plate; by connecting the limit plate with the other end of the guide rod, the limit plate can limit the clamping plate, thereby preventing the clamping plate from detaching from the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional diagram of a quartz boat in the prior art;

[0021] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0022] 10' top plate, 11' placement rod, 12' placement groove, 13' reinforcement rod, 14' positioning hole.

[0023] Figure 2 It is a side view of a quartz boat welding positioning mold of the utility model;

[0024] Figure 3 It is a top view of a quartz boat welding positioning mold of the utility model;

[0025] Figure 4 for Figure 3 A local enlarged view of point A;

[0026] in, Figures 2 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0027] 10 mounting plate, 11 accommodating groove, 12 first fixing plate, 13 first positioning pin, 14 supporting plate, 15 supporting groove, 16 positioning plate, 17 mounting groove, 18 screw, 19 second fixing plate, 20 second positioning pin, 21 limiting groove, 22 limiting rod, 23 hand wheel, 24 first placing table, 25 second placing table, 26 clamping plate, 27 spring, 28 buffer pad, 29 guide rod, 30 limiting plate. DETAILED DESCRIPTION

[0028] The following is a combination of specific implementation cases and attached Figures 2 to 4 The present invention is further described below, but the present invention is not limited to these embodiments.

[0029] A quartz boat welding positioning mold, such as Figures 2 to 4 As shown, the quartz boat welding positioning mold includes: a mounting plate 10, a first fixing plate 12, a first positioning pin 13, a supporting plate 14, a supporting groove 15, a positioning plate 16, a mounting groove 17, a lead screw 18, a second fixing plate 19 and a second positioning pin 20; a receiving groove 11 is arranged on the top of the mounting plate 10; the first fixing plate 12 is embedded in the receiving groove 11, and the first fixing plate 12 is connected to the end of the mounting plate 10; two first positioning pins 13 are connected to the first fixing plate 12; two supporting plates 14 are embedded in the receiving groove 11, and the two supporting plates 14 are connected to the mounting plate 10; two supporting grooves 15 are arranged on the top of the supporting plate 14; two The positioning plate 16 is embedded in the accommodating groove 11, the two positioning plates 16 are connected to the mounting plate 10, and the two positioning plates 16 are located between the two support plates 14; the mounting groove 17 is arranged at the bottom of the mounting plate 10; the outer wall of the lead screw 18 is provided with an external thread, the lead screw 18 is embedded in the mounting groove 17, and the lead screw 18 is rotatably connected to the mounting plate 10; a threaded hole is provided in the second fixing plate 19, and an internal thread is provided in the threaded hole, at least part of the second fixing plate 19 is embedded in the mounting groove 17, and the lead screw 18 passes through the threaded hole of the second fixing plate 19; two second positioning pins 20 are connected to the second fixing plate 19; wherein the external thread is adapted to the internal thread.

[0030] By embedding the first fixing plate 12 into the receiving groove 11 of the mounting plate 10, connecting the first fixing plate 12 with the end of the mounting plate 10, and connecting the two first positioning pins 13 with the first fixing plate 12, the first positioning pin 13 can be embedded in the positioning hole of a top plate, and the top plate and the first fixing plate 12 are fitted together, so that the first fixing plate 12 can position a top plate. By embedding the two support plates 14 into the receiving groove 11 and connecting the two support plates 14 with the mounting plate 10, the mounting plate 10 supports the two support plates 14, thereby improving the stability of the two support plates 14; by setting two support grooves 15 on the top of the support plate 14, the two reinforcing rods can be placed in the two support grooves 15 respectively, so that the two support plates 14 support and position the two reinforcing rods, thereby facilitating the welding of the two reinforcing rods on the top plate. By embedding the two positioning plates 16 into the receiving groove 11 and connecting the two positioning plates 16 with the mounting plate 10, the mounting plate 10 supports the two positioning plates 16, so that the positioning plates 16 are embedded into the placement groove of the placement rod, and then the two positioning plates 16 support and position the two placement rods, so as to facilitate welding the two placement rods to the top plate. By setting the mounting groove 17 at the bottom of the mounting plate 10, the lead screw 18 is embedded into the mounting groove 17, and the lead screw 18 is rotatably connected to the mounting plate 10, so that the mounting plate 10 supports the lead screw 18, so that the lead screw 18 can rotate in the mounting groove 17; by embedding at least part of the second fixing plate 19 into the mounting groove 17, and passing the lead screw 18 through the threaded hole of the second fixing plate 19, so that the lead screw 18 is threadedly connected to the second fixing plate 19, so that the lead screw 18 is rotated, so that the lead screw 18 drives the second fixing plate 19. Move, and then adjust the distance between the second fixing plate 19 and the first fixing plate 12; by connecting the two second positioning pins 20 to the second fixing plate 19, so that the second positioning pins 20 can be embedded in the positioning holes of the top plate, so that the second fixing plate 19 can position the other top plate through the two second positioning pins 20, and then the second fixing plate 19 can drive the other top plate to move, and make the top plate fit with the two placement rods and the two reinforcement rods at the same time, so as to facilitate welding the top plate with the two placement rods and the two reinforcement rods.

[0031] When the product is used, firstly, a top plate is fitted with the first fixing plate 12, and two first positioning pins 13 are respectively embedded in two positioning holes on the top plate, so that the first fixing plate 12 can position the top plate; then, two reinforcing rods are placed in the supporting grooves 15 of the two supporting plates 14, and one end of the two reinforcing rods is fitted with a top plate at the same time to position the two reinforcing rods; then, one end of the two reinforcing rods is welded to the top plate; then, one end of the two placement rods is fitted with the top plate, and the positioning plate 16 is embedded in the placement groove of the placement rod. So that the two positioning plates 16 can position the two placement rods; then, one end of the two placement rods is welded to the top plate; then, the other top plate is fitted with the second fixed plate 19, and the two second positioning pins 20 are respectively embedded in the two positioning holes on the top plate, so that the second fixed plate 19 can position the top plate; then, the lead screw 18 is rotated to make the lead screw 18 drive the second fixed plate 19 and the top plate to move toward the first fixed plate 12, so that the top plate is fitted with the two reinforcing rods and the two placement rods at the same time; then, the top plate is welded to the reinforcing rods and the placement rods.

[0032] By adopting the above structure, two reinforcing rods are positioned by two supporting plates 14, two positioning plates 16 are positioned by two placing rods, and the first fixed plate 12 is positioned by one top plate, so as to improve the relative position accuracy of the two reinforcing rods, two placing rods and one top plate, thereby improving the quality of the product. By positioning the other top plate by the second fixed plate 19, and driving the second fixed plate 19 and the other top plate to move by the lead screw 18, the distance between the two top plates is adjusted, so that when the reinforcing rods and the placing rods are welded to the top plate positioned on the first fixed plate 12, there is enough space between the top plate positioned on the second fixed plate 19 and the reinforcing rods and the placing rods, so as to improve the use experience of the product. At the same time, the lead screw 18 can be rotated to drive the second fixed plate 19 and the top plate to move toward the first fixed plate 12, so as to achieve the top plate and the reinforcing rods and the placing rods to fit, so as to facilitate the welding of the reinforcing rods and the placing rods to the top plate.

[0033] In the embodiment of the present utility model, Figures 2 to 4 As shown, the quartz boat welding positioning mold also includes: a limiting groove 21 and a limiting rod 22; the two limiting grooves 21 are arranged on both sides of the mounting plate 10; the two limiting rods 22 are respectively connected to the two sides of the second fixing plate 19, and the two limiting rods 22 pass through the two limiting grooves 21 respectively.

[0034] By setting two limit grooves 21 on both sides of the mounting plate 10, connecting two limit rods 22 to the two sides of the second fixed plate 19 respectively, and passing the two limit rods 22 through the two limit grooves 21 respectively, the second fixed plate 19 can be limited to move along the limit grooves 21, thereby avoiding the second fixed plate 19 from being offset during movement, so as to improve the stability of the movement of the second fixed plate 19.

[0035] In the embodiment of the present utility model, Figures 2 to 4 As shown, the quartz boat welding positioning mold also includes: a hand wheel 23; the hand wheel 23 is connected to the lead screw 18, and the hand wheel 23 is located outside the mounting plate 10.

[0036] By connecting the handwheel 23 to the screw 18 and locating the handwheel 23 on the outside of the mounting plate 10, the handwheel 23 can be rotated to drive the screw 18 to rotate, thereby reducing the difficulty of the screw 18 and improving the user experience of the product.

[0037] In the embodiment of the present utility model, Figures 2 to 4 As shown, the quartz boat welding positioning mold also includes: a first placing table 24 and a second placing table 25; the first placing table 24 is connected to the side of the first fixed plate 12 close to the support plate 14, and the first placing table 24 is located below the two first positioning pins 13; the second placing table 25 is connected to the side of the second fixed plate 19 close to the support plate 14, and the second placing table 25 is located below the two second positioning pins 20; wherein, the first placing table 24 and the first fixed plate 12 are an integrated structure, and the second placing table 25 and the second fixed plate 19 are an integrated structure.

[0038] By connecting the first placing platform 24 to the side of the first fixing plate 12 close to the support plate 14, and making the first placing platform 24 located below the two first positioning pins 13, it is possible to place the top plate on the first placing platform 24 when the first positioning pins 13 pass through the positioning holes of the top plate, thereby improving the stability of the top plate; by connecting the second placing platform 25 to the side of the second fixing plate 19 close to the support plate 14, and making the second placing platform 25 located below the two second positioning pins 20, it is possible to place the top plate on the second placing platform 25 when the second positioning pins 20 pass through the positioning holes of the top plate, thereby improving the stability of the top plate.

[0039] By configuring the first placement table 24 and the first fixed plate 12 as an integrated structure, the first placement table 24 and the first fixed plate 12 can be processed and formed at one time, thereby reducing the processing difficulty of the first placement table 24 and the first fixed plate 12, and improving the connection strength between the first placement table 24 and the first fixed plate 12; by configuring the second placement table 25 and the second fixed plate 19 as an integrated structure, the second placement table 25 and the second fixed plate 19 can be processed and formed at one time, thereby reducing the processing difficulty of the second placement table 25 and the second fixed plate 19, and improving the connection strength between the second placement table 25 and the second fixed plate 19.

[0040] In the embodiments of the present invention, Figures 2 to 4 As shown, the quartz boat welding positioning mold also includes: a clamping plate 26, a spring 27 and a buffer pad 28; the clamping plate 26 is located on the side of the first fixed plate 12 close to the support plate 14; one end of the spring 27 is connected to the first fixed plate 12, and the other end of the spring 27 is connected to the clamping plate 26; the buffer pad 28 is an elastomer, and the buffer pad 28 is connected to the side of the clamping plate 26 close to the first fixed plate 12.

[0041] By connecting one end of the spring 27 to the first fixing plate 12, connecting the other end of the spring 27 to the clamping plate 26, and connecting the buffer pad 28 to the side of the clamping plate 26 close to the first fixing plate 12, the first fixing plate 12 supports the clamping plate 26 through the spring 27, so that the clamping plate 26 can clamp the top plate through the buffer pad 28, thereby improving the stability of the top plate. By setting the buffer pad 28 as an elastic body, the clamping plate 26 is prevented from rigidly contacting with the top plate, thereby preventing damage to the top plate, thereby improving the processing quality of the product.

[0042] With the above structure, before the first positioning pin 13 is embedded in the positioning hole of the top plate, the clamping plate 26 is pulled to increase the distance between the clamping plate 26 and the first fixing plate 12, thereby facilitating the positioning of the first positioning pin 13 on the top plate; at this time, the spring 27 is in a stretched state; then, the clamping plate 26 is released, and the spring 27 is reset, so that the clamping plate 26 is fitted with the top plate through the buffer pad 28 to improve the stability of the top plate.

[0043] In the embodiments of the present invention, Figures 2 to 4 As shown, the quartz boat welding positioning mold also includes: a guide rod 29 and a limit plate 30; one end of the guide rod 29 is connected to the first fixed plate 12, and the other end of the guide rod 29 passes through the spring 27 and the clamping plate 26 in sequence; the limit plate 30 is connected to the other end of the guide rod 29.

[0044] By connecting one end of the guide rod 29 to the first fixed plate 12, and passing the other end of the guide rod 29 through the spring 27 and the clamping plate 26 in sequence, the clamping plate 26 can be moved along the guide rod 29, thereby avoiding the displacement of the clamping plate 26 during movement, so as to improve the stability of the movement of the clamping plate 26; by connecting the limit plate 30 to the other end of the guide rod 29, the limit plate 30 can limit the clamping plate 26, thereby avoiding the clamping plate 26 from detaching from the guide rod 29.

[0045] In the description of the present invention, the term "plurality" refers to two or more than two. Unless otherwise clearly defined, the orientation or positional relationship indicated by the terms "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention. The terms "connection", "installation", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the description of the present invention, the terms "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. 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 quartz boat welding positioning mold, characterized in that: The quartz boat welding positioning mold comprises: A mounting plate, wherein a receiving groove is provided on the top of the mounting plate; A first fixing plate, wherein the first fixing plate is embedded in the accommodating groove and connected to an end portion of the mounting plate; First positioning pins, two of which are connected to the first fixing plate; Support plates, two of which are embedded in the receiving grooves and connected to the mounting plate; Support grooves, two of which are arranged on the top of the support plate; Positioning plates, two of the positioning plates are embedded in the accommodating grooves, the two positioning plates are connected to the mounting plates, and the two positioning plates are located between the two supporting plates; A mounting groove, the mounting groove is arranged at the bottom of the mounting plate; A lead screw, wherein an external thread is arranged on an outer wall of the lead screw, the lead screw is embedded in the mounting groove, and the lead screw is rotatably connected to the mounting plate; A second fixing plate, wherein a threaded hole is provided in the second fixing plate, wherein an internal thread is provided in the threaded hole, at least a portion of the second fixing plate is embedded in the mounting groove, and the lead screw passes through the threaded hole of the second fixing plate; second positioning pins, two of which are connected to the second fixing plate; Wherein, the external thread is matched with the internal thread.

2. A quartz boat welding positioning mold according to claim 1, characterized in that: The quartz boat welding positioning mold also includes: Limiting grooves, two of which are arranged on both sides of the mounting plate; The two limiting rods are respectively connected to two sides of the second fixing plate, and the two limiting rods pass through the two limiting grooves respectively.

3. A quartz boat welding positioning mold according to claim 2, characterized in that: The quartz boat welding positioning mold also includes: A handwheel is connected to the lead screw and is located outside the mounting plate.

4. A quartz boat welding positioning mold according to claim 1, characterized in that: The quartz boat welding positioning mold also includes: A first placement platform, the first placement platform is connected to a side of the first fixing plate close to the support plate, and the first placement platform is located below the two first positioning pins; A second placement platform, the second placement platform is connected to a side of the second fixing plate close to the support plate, and the second placement platform is located below the two second positioning pins; The first placement platform and the first fixing plate are an integrated structure, and the second placement platform and the second fixing plate are an integrated structure.

5. A quartz boat welding positioning mold according to claim 4, characterized in that: The quartz boat welding positioning mold also includes: A clamping plate, the clamping plate is located on a side of the first fixing plate close to the supporting plate; A spring, one end of which is connected to the first fixing plate, and the other end of which is connected to the clamping plate; The buffer pad is an elastic body and is connected to a side of the clamping plate close to the first fixing plate.

6. A quartz boat welding positioning mold according to claim 5, characterized in that: The quartz boat welding positioning mold also includes: A guide rod, one end of which is connected to the first fixing plate, and the other end of which passes through the spring and the clamping plate in sequence; A limiting plate is connected to the other end of the guide rod.

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