Bracket structure for PVD (Physical Vapor Deposition) coating of cutter

Abstract

The utility model provides a bracket structure for a PVD (Physical Vapor Deposition) coating of a cutter, and belongs to the technical field of brackets. The bracket structure for the PVD coating of the cutter comprises a height adjusting mechanism and a dismounting mechanism, the height adjusting mechanism comprises a base, a pair of fixing seats is installed on each of the two sides of the upper end of the base, a door-shaped frame is movably inserted between the pair of fixing seats, and screw rods are rotationally connected to the interiors of the pair of fixing seats; a pair of threaded sleeves are rotatably inserted into the bottom end of the door-shaped frame through bearings, one ends of the pair of screws penetrate through the threaded sleeves, extend into the door-shaped frame and are in threaded connection with the threaded sleeves, the dismounting mechanism comprises a plurality of connecting bases, and the bottom ends of the connecting bases are fixedly connected with the upper end of the base. The outer portion of the upper end of the connecting base is movably sleeved with a first mounting rod, the outer portion of the upper end of the first mounting rod is movably sleeved with a second mounting rod, a plurality of threaded holes are formed in the outer portion of the first mounting rod and the outer portion of the second mounting rod, a plurality of mounting discs are slidably connected to the outer portion of the first mounting rod and the outer portion of the second mounting rod, and square grooves are formed in the mounting discs. Bolts are in threaded connection with the interior, close to the square groove, of the mounting disc and are in threaded connection with the threaded holes.

Description

Technical Field

[0001] The utility model relates to the technical field of brackets, in particular to a bracket structure used for PVD coating of cutting tools. Background Art

[0002] Coated tools are a new type of tool material that has appeared in the past 20 years. It is an important breakthrough in the development of tools and an effective measure to solve the contradiction between hardness, wear resistance and strength and toughness in tool materials. Coated tools are obtained by coating a layer of refractory metal compounds with high wear resistance on some toughness-resistant cemented carbide or high-speed steel tool substrates. Commonly used coating materials include TC, TN and A2O3. The function of the coating is to separate the tool from the material being cut, reduce wear, reduce adhesion and heat insulation, so as to extend the service life of the tool. Today's tools need to be fixed on the bracket during the PVD coating process.

[0003] For example, a Chinese patent with publication number CN220812607U discloses a bracket structure for tool PVD coating, which belongs to the technical field of tool PVD coating. This bracket structure for tool PVD coating includes a mobile bracket, the mobile bracket includes a mobile base, a fixed bracket is fixedly installed on the top of the mobile base, a motor base is provided at one end of the mobile base, a driving mechanism is provided inside the motor base, a fixed tube is fixedly installed between the mobile base and the fixed bracket, a fixed tray is provided outside the fixed tube, a planetary gear set is provided inside the fixed tray, and a tool chuck is fixedly installed at the output end of the planetary gear set. This utility model can effectively fix the tool, and drive the tool to rotate and revolve, so that the tool surface is evenly coated, and has high practical value;

[0004] The technical solution recorded in this proposal is to drive the tool chuck to rotate and revolve by setting a driving mechanism, so that the tool clamped and fixed on the top of the tool chuck can be evenly coated. However, in actual use, the overall structure of the bracket is mostly welded, which is not convenient for height adjustment according to vacuum welding furnaces of different sizes. After the tool chuck on the bracket is assembled and clamped, when the height of the bracket is too high to enter the vacuum welding furnace, the tool needs to be disassembled again, and the bracket needs to be replaced and reassembled, which reduces the coating efficiency. Utility Model Content

[0005] In order to solve the above technical problems, the embodiment of the utility model provides a bracket structure for PVD coating of cutting tools, which is specifically implemented by the following technical solutions:

[0006] A bracket structure for PVD coating of a tool, comprising a height adjustment mechanism and a disassembly mechanism, the height adjustment mechanism comprising a base, a pair of fixed seats are installed on both sides of the upper end of the base, a portal frame is movably inserted between the pair of fixed seats, a pair of screws are rotatably connected inside the fixed seats, a pair of threaded sleeves are rotatably inserted inside the bottom end of the portal frame through a bearing, one end of the pair of screws passes through the threaded sleeves and extends to the interior of the portal frame, and are threadedly connected to the threaded sleeves, the disassembly mechanism comprises a plurality of connecting seats, the bottom ends of the plurality of connecting seats are fixedly connected to the upper end of the base, a first mounting rod is movably sleeved on the outer end of the upper end of the connecting seat, a second mounting rod is movably sleeved on the outer end of the first mounting rod, a plurality of threaded holes are provided on the outer ends of the first mounting rod and the second mounting rod, and a plurality of mounting plates are slidably connected on the outer ends of the first mounting rod and the second mounting rod, a square groove is provided inside the mounting plate, and a bolt is threadedly connected to the inner part of the mounting plate near the square groove, and the bolt is threadedly connected to the threaded hole.

[0007] Furthermore, the exterior of the portal frame is slidably connected to the inner wall of the fixing seat via a slide bar, and the screw rod passes through the base at one end away from the interior of the portal frame and extends to the interior of the base, and is sleeved with a driven bevel gear.

[0008] The beneficial effect of adopting the above further scheme is that by arranging a driven bevel gear on the outside of one end of the screw, when the driven bevel gear rotates, the screw will rotate, thereby rotating the threaded sleeve connected to the external thread of the screw, and the rotation of the threaded sleeve will drive the portal frame to achieve linear movement under the action of the sliding connection with the fixed seat.

[0009] Furthermore, a pair of rotating rods are rotatably connected inside the base, and driving bevel gears are sleeved on the outside of the rotating rods near the driven bevel gears, and the driving bevel gears and the driven bevel gears are meshed with each other.

[0010] The beneficial effect of adopting the above further solution is that by arranging a driving bevel gear outside the rotating rod, and the driving bevel gear meshing with the driven bevel gear, when the rotating rod rotates, the driving bevel gear will be driven to rotate, thereby realizing the rotation of the driven bevel gear.

[0011] Furthermore, a worm gear is sleeved on the outside of one of the rotating rods near the center, and a worm is rotatably connected to the inside of the base near the worm gear, and the worm and the worm gear are meshed with each other.

[0012] The beneficial effect of adopting the above further scheme is that by arranging a worm wheel on the outside of one of the rotating rods, and the worm wheel and the worm are meshed with each other, when the worm rotates, it will drive the worm wheel to rotate, thereby realizing the rotation of one of the rotating rods with the worm wheel on the outside.

[0013] Furthermore, a synchronous wheel is sleeved on the outside of the pair of rotating rods away from the worm gear, and a synchronous belt is wound between the pair of synchronous wheels.

[0014] The beneficial effect of adopting the above further scheme is that by arranging synchronous wheels on the outside of a pair of rotating rods, and the pair of synchronous wheels are driven by a synchronous belt, when one of the rotating rods with a worm gear on the outside rotates, the synchronous wheel on the outside will rotate, and the other rotating rod without a worm gear on the outside will be driven to rotate under the transmission action of the synchronous belt.

[0015] Furthermore, a motor is installed on one side of the top end of the base, and the output end of the motor is transmission-connected to the worm through a coupling.

[0016] The beneficial effect of adopting the above further solution is that by providing a motor, since the output end of the motor is connected to the worm through a coupling, when the motor is started, the worm will be driven to rotate.

[0017] Furthermore, a transverse plate is installed between a pair of the door-shaped frames, and a plurality of through holes are opened on the transverse plate, and the inner walls of the through holes are in contact with the outer part of the upper end of the second mounting rod.

[0018] The beneficial effect of adopting the above further scheme is that by arranging a through hole on the horizontal plate, since the inner wall of the through hole fits with the outer part of the upper end of the second mounting rod, and the bottom end of the horizontal plate and the second mounting rod are squeezed and fitted, when the horizontal plate moves close to the second mounting rod under the action of the portal frame until it is squeezed, the first mounting rod and the second mounting rod are tightly fitted.

[0019] Furthermore, a limit groove is provided at the inner center of the mounting plate, and a plurality of tool chucks are installed at the upper end of the mounting plate, and the plurality of tool chucks are distributed in a ring shape. Limit strips are installed on both sides of the outside of the first mounting rod and the second mounting rod, and the limit strips and the limit grooves match each other and are slidably connected.

[0020] The beneficial effect of adopting the above-mentioned further scheme is that by setting the limit groove and the limit strip, since the limit strip and the limit groove are adapted and slidably connected, it is convenient for the mounting plate on the first mounting rod to move on the first mounting rod to thereby realize the position adjustment of the mounting plate, and it is convenient for the mounting plate on the second mounting rod to move on the second mounting rod to thereby realize the position adjustment of the mounting plate.

[0021] The beneficial effects of the utility model are as follows: the utility model obtains a bracket structure for PVD coating of a tool through the above design. The bracket structure for PVD coating of a tool is convenient for adjusting the height of a pair of door frames by setting a height adjustment mechanism, so as to facilitate the overall size adjustment of the bracket according to vacuum welding furnaces of different sizes and models. A screw is arranged inside the fixed seat, and a driven bevel gear is arranged outside one end of the screw. When the driven bevel gear rotates, the screw is rotated, so that the threaded sleeve connected to the outer thread of the screw rotates. The rotation of the threaded sleeve drives the door frame to realize linear movement under the action of sliding connection with the fixed seat, so as to The height adjustment of a pair of door frames is realized. When it is necessary to disassemble the first mounting rod and the second mounting rod, the cross plate moves away from the second mounting rod under the action of the door frame. The first mounting rod is movably sleeved on the outer part of the upper end of the connecting seat, and the second mounting rod is movably sleeved on the outer part of the upper end of the first mounting rod, so that the connecting seat, the first mounting rod and the second mounting rod are in a detachable state. Threaded holes are set on the first mounting rod and the second mounting rod, and the threaded holes are threadedly connected with bolts set with internal threads of the mounting plate. When the bolts are unscrewed, the mounting plate on the first mounting rod and the first mounting rod are in an active state, and the mounting plate on the second mounting rod and the second mounting rod are in an active state. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A three-dimensional structural schematic diagram of a bracket structure for PVD coating of a tool provided by the utility model;

[0024] Figure 2 A three-dimensional structural schematic diagram of a height adjustment mechanism of a bracket structure for PVD coating of a tool provided by the utility model;

[0025] Figure 3 It is a schematic exploded three-dimensional structure diagram of a first mounting rod and a mounting plate of a bracket structure for PVD coating of a tool provided by the utility model;

[0026] Figure 4 It is a schematic diagram of an exploded three-dimensional structure of a base of a bracket structure for PVD coating of a tool provided by the utility model;

[0027] Figure 5 The utility model provides a schematic diagram of the side section structure of a base of a bracket structure for PVD coating of a tool.

[0028] In the figure: 100, height adjustment mechanism; 1001, base; 1002, fixed seat; 1003, cross plate; 1004, through hole; 1005, screw; 1006, portal frame; 1007, threaded sleeve; 1008, driven bevel gear; 1009, rotating rod; 1010, driving bevel gear; 1011, worm gear; 1012, worm; 1013, motor; 1014, synchronous wheel; 1015, synchronous belt; 200, disassembly mechanism; 2001, connecting seat; 2002, first mounting rod; 2003, second mounting rod; 2004, threaded hole; 2005, mounting plate; 2006, tool chuck; 2007, bolt; 2008, limit strip; 2009, limit groove. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1

[0032] The utility model provides the following technical solutions: Figure 1-Figure 5As shown, a bracket structure for PVD coating of a tool includes a height adjustment mechanism 100 and a disassembly mechanism 200, wherein the height adjustment mechanism 100 includes a base 1001, a pair of fixed seats 1002 are installed on both sides of the upper end of the base 1001, a portal frame 1006 is movably inserted between the pair of fixed seats 1002, the interiors of the pair of fixed seats 1002 are rotatably connected with screw rods 1005, a pair of threaded sleeves 1007 are rotatably inserted in the bottom end of the portal frame 1006 through bearings, one end of the pair of screw rods 1005 passes through the threaded sleeves 1007 and extends to the interior of the portal frame 1006, and both are connected to the threaded sleeves 1007. The disassembly mechanism 200 comprises a plurality of connection seats 2001, the bottom ends of the plurality of connection seats 2001 are fixedly connected to the upper end of the base 1001, the upper end of the connection seat 2001 is externally sleeved with a first mounting rod 2002, the upper end of the first mounting rod 2002 is externally sleeved with a second mounting rod 2003, the outer portions of the first mounting rod 2002 and the second mounting rod 2003 are both provided with a plurality of threaded holes 2004, and the outer portions of the first mounting rod 2002 and the second mounting rod 2003 are both slidably connected with a plurality of mounting plates 2005, the inner portions of the mounting plates 2005 are provided with square grooves, and the mounting plates 2005 are located near the inner portions of the square grooves. The bolt 2007 is threadedly connected to the threaded hole 2004, and a screw rod 1005 is arranged inside the fixing seat 1002. When the screw rod 1005 rotates, the threaded sleeve 1007 threadedly connected to the outside of the screw rod 1005 rotates. The rotation of the threaded sleeve 1007 drives the portal frame 1006 to achieve linear movement under the action of the sliding connection with the fixing seat 1002, thereby achieving a pair of portal frames 1006. The height adjustment is then facilitated to adjust the size of the bracket as a whole according to vacuum welding furnaces of different sizes and models. A first mounting rod 2002 is movably sleeved on the outside of the upper end of the connecting seat 2001. The second mounting rod 2003 is movably sleeved on the outer portion of the upper end of the first mounting rod 2002, so that the connecting seat 2001, the first mounting rod 2002 and the second mounting rod 2003 are in a detachable state, and threaded holes 2004 are set on the first mounting rod 2002 and the second mounting rod 2003, and the threaded holes 2004 are threadedly connected with bolts 2007 with internal threads of the mounting plate 2005. When the bolts 2007 are unscrewed, the mounting plate 2005 on the first mounting rod 2002 and the first mounting rod 2002 will be in an active state, and the mounting plate 2005 on the second mounting rod 2003 and the second mounting rod 2003 will be in an active state.

[0033] Embodiment 2

[0034] Reference Figure 1-Figure 5As shown, the outside of the door frame 1006 is slidably connected to the inner wall of the fixed seat 1002 through a slide bar, and the screw 1005 passes through the base 1001 at the end away from the inside of the door frame 1006 and extends to the inside of the base 1001, and is sleeved with a driven bevel gear 1008. The inside of the base 1001 is rotatably connected with a pair of rotating rods 1009, and the outside of the rotating rods 1009 is sleeved with active bevel gears 1010 near the driven bevel gears 1008. The active bevel gears 1010 and the driven bevel gears 1008 are meshed with each other, and one of the rotating rods 1009 is engaged with the driven bevel gears 1010. A worm gear 1011 is sleeved on the outside of the rod 1009 near the center, a worm 1012 is rotatably connected to the inside of the base 1001 near the worm gear 1011, the worm 1012 and the worm gear 1011 are meshed with each other, a pair of rotating rods 1009 are sleeved on the outside away from the worm gear 1011, a synchronous belt 1015 is wound between the pair of synchronous wheels 1014, a motor 1013 is installed on one side of the top of the base 1001, and the output end of the motor 1013 is connected to the worm 1012 through a coupling. A horizontal plate 1003 is installed between the door-shaped frames 1006. A plurality of through holes 1004 are opened on the horizontal plate 1003. The inner wall of the through hole 1004 fits with the outer portion of the upper end of the second mounting rod 2003. By setting a motor 1013, when the motor 1013 is started, the worm 1012 is driven to rotate. Since the worm wheel 1011 is meshed with the worm 1012, when the worm 1012 rotates, the worm wheel 1011 is driven to rotate, thereby realizing the rotation of one of the rotating rods 1009 with the worm wheel 1011 on the outer side. 09 is provided with a synchronous wheel 1014 on the outside, and a pair of synchronous wheels 1014 are driven by a synchronous belt 1015. When one of the rotating rods 1009 with a worm gear 1011 on the outside is rotated, the synchronous wheel 1014 on the outside will be rotated, and the other rotating rod 1009 without a worm gear 1011 on the outside will be driven to rotate under the transmission action of the synchronous belt 1015, and the active bevel gear 1010 on the outside of the rotating rod 1009 will be driven to rotate, thereby realizing the rotation of the driven bevel gear 1008 and the rotation of the screw 1005.

[0035] Embodiment 3

[0036] Reference Figure 1-Figure 5As shown, a limiting groove 2009 is provided at the inner center of the mounting plate 2005, and a plurality of tool chucks 2006 are installed at the upper end of the mounting plate 2005, and the plurality of tool chucks 2006 are distributed in a ring shape. Limiting strips 2008 are installed on both sides of the outside of the first mounting rod 2002 and the second mounting rod 2003, and the limiting strips 2008 match with the limiting groove 2009 and are slidably connected. By setting the limiting groove 2009 and the limiting strip 2008, since the limiting strip 2008 and the limiting groove 2009 are adapted and slidably connected, it is convenient for the mounting plate 2005 on the first mounting rod 2002 to move on the first mounting rod 2002 to adjust the position of the mounting plate 2005, and it is convenient for the mounting plate 2005 on the second mounting rod 2003 to move on the second mounting rod 2003 to adjust the position of the mounting plate 2005.

[0037] Specifically, the working principle of the bracket structure for tool PVD coating is as follows: when in use, when the overall size of the bracket needs to be adjusted according to different sizes of vacuum welding furnaces, the motor 1013 is started to rotate the worm 1012, driving the worm wheel 1011 to rotate, so that one of the rotating rods 1009 with the worm wheel 1011 on the outside is rotated, and under the transmission action of the synchronous wheel 1014 and the synchronous belt 1015, the other rotating rod 1009 without the worm wheel 1011 on the outside is driven to rotate, so that the rotating rod 1009 on the outside is rotated. The sleeved active bevel gear 1010 rotates, thereby realizing the rotation of the driven bevel gear 1008, realizing the rotation of the screw rod 1005, and rotating the threaded sleeve 1007 connected to the external thread of the screw rod 1005. The rotation of the threaded sleeve 1007 drives the portal frame 1006 to achieve linear movement under the action of the sliding connection with the fixed seat 1002, thereby realizing the height adjustment of a pair of portal frames 1006. When the position of the mounting plate 2005 needs to be adjusted, the bolt 2007 is first unscrewed, which will cause the mounting plate 200 on the first mounting rod 2002 to move linearly. 5 is in an active state with the first mounting rod 2002, so that the mounting plate 2005 on the second mounting rod 2003 is in an active state with the second mounting rod 2003, and then the limiting strip 2008 and the limiting groove 2009 are adapted and slidably connected, so that the mounting plate 2005 on the first mounting rod 2002 can move on the first mounting rod 2002 to adjust the position of the mounting plate 2005, and the mounting plate 2005 on the second mounting rod 2003 can move on the second mounting rod 2003 to adjust the position of the mounting plate 2005, After the position is adjusted, the bolt 2007 is inserted into the threaded hole 2004 corresponding to the adjusted position. When the first mounting rod 2002 and the second mounting rod 2003 need to be disassembled, after the cross plate 1003 is away from the second mounting rod 2003 under the action of the door frame 1006, the first mounting rod 2002 is movably sleeved on the outer part of the upper end of the connecting seat 2001, and the second mounting rod 2003 is movably sleeved on the outer part of the upper end of the first mounting rod 2002, so that the first mounting rod 2002 and the second mounting rod 2003 are in a detachable state.

[0038] It should be noted that for a bracket structure used for PVD coating of a tool, the specific model and specifications of the motor 1013 need to be selected and determined based on the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it will not be described in detail.

[0039] A bracket structure for PVD coating of a tool. The power supply and principle of the motor 1013 are clear to those skilled in the art and will not be described in detail here.

[0040] The above description is only the preferred implementation 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 bracket structure for PVD coating of cutting tools, characterized in that: The invention comprises a height adjustment mechanism (100) and a disassembly mechanism (200), wherein the height adjustment mechanism (100) comprises a base (1001), a pair of fixed seats (1002) are installed on both sides of the upper end of the base (1001), a door frame (1006) is movably inserted between the pair of fixed seats (1002), the interiors of the pair of fixed seats (1002) are rotatably connected with screw rods (1005), a pair of threaded sleeves (1007) are rotatably inserted into the bottom end of the door frame (1006) through bearings, one end of the pair of screw rods (1005) passes through the threaded sleeves (1007) and extends to the interior of the door frame (1006), and is threadedly connected to the threaded sleeves (1007), and the disassembly mechanism (200) comprises a plurality of connecting seats (2001), if The bottom end of the connecting seat (2001) is fixedly connected to the upper end of the base (1001), the upper end of the connecting seat (2001) is provided with a first mounting rod (2002) in an external movable sleeve, the upper end of the first mounting rod (2002) is provided with a second mounting rod (2003), the first mounting rod (2002) and the second mounting rod (2003) are provided with a plurality of threaded holes (2004) on the outside, and the first mounting rod (2002) and the second mounting rod (2003) are slidably connected with a plurality of mounting plates (2005) on the outside, the mounting plates (2005) are provided with square grooves inside, and the mounting plates (2005) are threadedly connected with bolts (2007) near the square grooves, and the bolts (2007) are threadedly connected with the threaded holes (2004).

2. A bracket structure for PVD coating of a tool according to claim 1, characterized in that: The exterior of the portal frame (1006) is slidably connected to the inner wall of the fixed seat (1002) via a slide bar, and the screw rod (1005) penetrates the base (1001) at one end away from the interior of the portal frame (1006) and extends to the interior of the base (1001), and is sleeved with a driven bevel gear (1008).

3. A bracket structure for PVD coating of a tool according to claim 2, characterized in that: A pair of rotating rods (1009) are rotatably connected inside the base (1001), and driving bevel gears (1010) are sleeved on the outside of the rotating rods (1009) near the driven bevel gears (1008), and the driving bevel gears (1010) and the driven bevel gears (1008) are meshed with each other.

4. A bracket structure for PVD coating of a tool according to claim 3, characterized in that: A worm wheel (1011) is sleeved on the outside of one of the rotating rods (1009) near the center, and a worm (1012) is rotatably connected to the inside of the base (1001) near the worm wheel (1011), and the worm (1012) and the worm wheel (1011) are meshed with each other.

5. A bracket structure for PVD coating of a tool according to claim 4, characterized in that: A synchronous wheel (1014) is sleeved on the outside of the pair of rotating rods (1009) at a position away from the worm wheel (1011), and a synchronous belt (1015) is wound between the pair of synchronous wheels (1014).

6. A bracket structure for PVD coating of a tool according to claim 5, characterized in that: A motor (1013) is installed on one side of the top end of the base (1001), and an output end of the motor (1013) is transmission-connected to the worm (1012) via a coupling.

7. A bracket structure for PVD coating of a tool according to claim 6, characterized in that: A transverse plate (1003) is installed between a pair of the door-shaped frames (1006), and a plurality of through holes (1004) are provided on the transverse plate (1003). The inner walls of the through holes (1004) are in contact with the outer portion of the upper end of the second mounting rod (2003).

8. The bracket structure for PVD coating of a tool according to claim 1, characterized in that: A limiting groove (2009) is provided at the inner center of the mounting plate (2005), and a plurality of tool chucks (2006) are installed at the upper end of the mounting plate (2005), and the plurality of tool chucks (2006) are distributed in a ring shape. Limiting strips (2008) are installed on both sides of the outer sides of the first mounting rod (2002) and the second mounting rod (2003), and the limiting strips (2008) and the limiting grooves (2009) match each other and are slidably connected.

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