CN214196022U

CN214196022U - Assembling structure of aluminum profile door leaf frame

Info

Publication number: CN214196022U
Application number: CN202022678440.6U
Authority: CN
Inventors: 汤庆概
Original assignee: Foshan Gulimei Door And Window Co ltd
Current assignee: Foshan Gulimei Door And Window Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-09-14
Anticipated expiration: 2030-11-18

Abstract

The utility model relates to an assembly structure of aluminum profile door leaf frame, which comprises a horizontal frame, a vertical frame and a connector, wherein the horizontal frame is provided with a first embedding groove and a T-shaped embedding groove; the vertical frame is provided with a left embedded groove, a second embedded groove and a right embedded groove; the connector comprises an upper positioning assembly and a lower positioning assembly, the upper positioning assembly comprises a positioning block, a horizontal movable block, a vertical movable block, an adjusting screw rod and a connecting rod, and the lower positioning assembly comprises a left clamping block, a right clamping block and a fixing screw; the right clamping block is embedded in the right embedded groove, the upper positioning assembly is arranged above the end part of the upper end of the vertical frame, the left clamping block is embedded in the left embedded groove, the fixing screw sequentially penetrates through the right clamping block and the vertical frame and then is connected to the left clamping block in a threaded mode, the upper positioning assembly is embedded in the T-shaped embedded groove, the connecting rod penetrates out of the notch of the first embedded groove, and the lower surface of the transverse frame is tightly pressed on the top surface of the vertical frame. The utility model has the advantages of reliable structure, convenient disassembly and assembly, low maintenance cost and the like.

Description

Assembling structure of aluminum profile door leaf frame

Technical Field

The utility model relates to an assembly structure of door leaf frame.

Background

At present, a plurality of door leaf frames are made of aluminum profiles. Wherein the existing aluminum alloy door leaf frame is also connected together by seamless welding. When one frame is damaged, the damaged frame is difficult to replace independently; for this reason, many people have to replace the damaged door leaf entirely, which easily leads to an increase in the use cost of the user. Even if the follow-up replacement is forced, professional polishing equipment, cutting equipment and welding equipment are needed; therefore, it is difficult for the ordinary user to replace the door leaf by himself, and a professional is required to replace the door leaf, which easily causes the maintenance cost of the door leaf to increase.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve above-mentioned problem and not enough, provide an assembly structure of aluminium alloy door leaf frame, this assembly structure has advantages such as the structure is reliable, easy dismounting, maintenance cost are little.

The technical scheme of the utility model is realized like this:

the assembling structure of the aluminum profile door leaf frame is characterized by comprising a transverse frame, a vertical frame and a connector, wherein a first embedding groove is formed in the bottom surface of the transverse frame, the first embedding groove extends transversely and extends to the left end surface and the right end surface of the transverse frame, a T-shaped embedding groove is formed in the bottom of the first embedding groove, the T-shaped embedding groove extends transversely and extends to the left end surface and the right end surface of the transverse frame, upper covering strips are respectively covered on the left end surface and the right end surface of the transverse frame, and the upper covering strips cover the port of the T-shaped embedding groove and the port of the first embedding groove; the left surface of the vertical frame is provided with a left embedded groove, the left embedded groove extends vertically, the left embedded groove extends to the upper end face and the lower end face of the vertical frame, a lower covering strip is covered on a notch of the left embedded groove, the right surface of the vertical frame is provided with a second embedded groove, the second embedded groove extends vertically, the second embedded groove extends to the upper end face and the lower end face of the vertical frame, the bottom of the second embedded groove is provided with a right embedded groove, the right embedded groove extends vertically, the right embedded groove extends to the upper end face and the lower end face of the vertical frame, and the bottom of the right embedded groove is provided with a through hole penetrating into the left embedded groove; the connector comprises an upper positioning component and a lower positioning component, wherein the upper positioning component comprises a positioning block, a horizontal movable block, a vertical movable block, an adjusting screw rod and a connecting rod, a convex part is arranged on the left edge of the top surface of the positioning block, a abdicating notch is arranged in the middle of the lower edge of the right wall of the convex part, a counter bore penetrating into the abdicating notch is arranged in the middle of the lower edge of the left wall of the convex part, a through hole penetrating onto the bottom surface of the positioning block is arranged in the middle of the top surface of the positioning block, an inclined guide plane is arranged on the top surface of the horizontal movable block, the right edge of the guide plane is higher than the left edge of the guide plane, an abdicating hole penetrating onto the bottom surface of the horizontal movable block is arranged in the middle of the guide plane, an upper threaded hole is arranged on the left surface of the horizontal movable block, a contact plane is arranged on the bottom surface of the vertical movable block, and the right edge of the contact plane is higher than the left edge of the contact plane, the horizontal movable block is movably arranged on the top surface of the positioning block, the abdicating hole is positioned right above the perforation, the adjusting screw rod is arranged in the counter bore, the adjusting screw rod penetrates through the abdicating notch and then is screwed on the upper threaded hole, the connecting rod is vertically arranged, the upper end of the connecting rod is fixedly connected with the middle part of the contact plane, the vertical movable block is movably arranged above the horizontal movable block, the contact plane is attached to the guide plane, the left surface of the vertical movable block is attached to the right surface of the protruding baffle part, and the lower end of the connecting rod sequentially penetrates through the abdicating hole and the perforation and then is arranged below the positioning block; the lower positioning assembly comprises a left clamping block, a right clamping block and a fixing screw, a sleeve penetrating hole penetrating to the right wall of the left clamping block is formed in the left wall of the left clamping block, a lower threaded hole is formed in the left wall of the right clamping block, and the top of the right clamping block is fixedly connected with the lower end of the connecting rod; the right clamping block is embedded in the right embedded groove, a lower threaded hole in the right clamping block is communicated with the through hole in a butt joint mode, the upper positioning assembly is further arranged above the upper end portion of the vertical frame, the left clamping block is embedded in the left embedded groove, a sleeve penetrating hole in the left clamping block is communicated with the through hole in a butt joint mode, the fixing screw penetrates through the sleeve penetrating hole and the through hole in sequence and then is in threaded connection with the lower threaded hole, the upper positioning assembly is embedded in the T-shaped embedded groove, the connecting rod penetrates out of a notch of the first embedded groove, and the lower surface of the transverse frame is tightly pressed on the top surface of the vertical frame.

The utility model has the advantages that: through the first embedding groove and the second embedding groove, the door leaf plate can be embedded, and therefore the accuracy and the reliability of installation and positioning of the door leaf plate are improved. Through the establishment of the left embedded groove and the right embedded groove, the left clamping block and the right clamping block can be installed and hidden, so that the influence of the left clamping block and the right clamping block on the attractiveness of the assembly structure can be avoided. The end face of the transverse frame, the port of the T-shaped embedding groove and the port of the first embedding groove are covered by the upper covering strip, and the lower covering strip covers the notch of the left embedding groove; this prevents the aesthetics of the assembled structure from being compromised. Through the structural design, the horizontal movable block can be pulled to move leftwards when the adjusting screw rod is screwed down. The horizontal movable block is provided with a guide plane, and the right edge of the guide plane is higher than the left edge of the guide plane; the contact plane on the vertical movable block is attached to the guide plane, the right edge of the contact plane is higher than the left edge of the contact plane, and the left wall of the vertical movable block is attached to the right wall of the protruding stop part; therefore, when the horizontal movable block moves leftwards, the vertical movable block can move upwards. Because the upper end and the lower end of the connecting rod are respectively fixed on the vertical movable block and the right clamping block, the right clamping block can move upwards when the vertical movable block moves upwards. Because the upper positioning component is embedded in the T-shaped embedding groove, the right clamping block is fixed on the vertical frame through the fixing screw, and the lower surface of the transverse frame is pressed on the top of the vertical frame, the vertical frame and the transverse frame can be close to each other and tightly attached together when the adjusting screw is screwed down, and the vertical frame and the transverse frame can be firmly connected together. Because the assembly structure can firmly connect the horizontal frame and the vertical frame together by screwing the adjusting screw; therefore, the assembly of the transverse frame and the vertical frame is very convenient. On the contrary, the vertical frame and the horizontal frame are not attached together any more by unscrewing the adjusting screw, so that the upper positioning assembly can be conveniently moved out of the T-shaped embedding groove, and the convenience for detaching the horizontal frame and the vertical frame can be improved. To sum up, the utility model discloses an assembly structure equipment all is very convenient with the dismantlement, like this when the damage appears in one of horizontal frame, perpendicular frame, can be fast with changing the component that damages, need not wholly to scrap, and only need use screwdriver or handle just can realize the dismouting, need not to use the equipment of other specialty, and this use cost and the maintenance cost that helps reducing the user. The fixing screw penetrates through the sleeve hole and the through hole in sequence and then is screwed on the lower threaded hole, and the lower threaded hole is formed in the right clamping block; through the arrangement of the left clamping block and the right clamping block, the structural strength of the bolt joint of the fixing screw can be effectively improved, so that the reliability of installation and fixation of the lower positioning assembly is improved, and the reliability of an assembly structure is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic structural view of the section a-a in fig. 1 according to the present invention.

Fig. 3 is a schematic structural view of a section B-B in fig. 1 according to the present invention.

Fig. 4 is a schematic view of a cross-sectional structure of the middle cross frame of the present invention.

Fig. 5 is a schematic view of a cross-sectional structure of the middle vertical frame of the present invention.

Fig. 6 is a schematic perspective view of the connector of the present invention.

Fig. 7 is a schematic view of the split structure of the middle connector of the present invention.

Fig. 8 is a schematic structural diagram of the middle positioning block of the present invention.

Fig. 9 is a schematic structural diagram of the horizontal movable block of the present invention.

Fig. 10 is a schematic view of an assembly structure of the middle vertical movable block and the connecting rod of the present invention.

Fig. 11 is a schematic structural view of the upper covering strip of the present invention.

Detailed Description

It should be noted that all the directional indicators (such as left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

As shown in fig. 1, the assembly structure of a table board and table legs of the present invention comprises a horizontal frame 1, a vertical frame 2, and a connector 3, wherein, as shown in fig. 1, fig. 2, and fig. 4, a first embedding groove 11 is provided on a bottom surface of the horizontal frame 1, the first embedding groove 11 extends transversely, the first embedding groove 11 also extends to left and right end surfaces of the horizontal frame 1, a T-shaped embedding groove 12 is provided at a bottom surface of the first embedding groove 11, the T-shaped embedding groove 12 extends transversely, the T-shaped embedding groove 12 extends to left and right end surfaces of the horizontal frame 1, the left and right end surfaces of the horizontal frame 1 are respectively covered with an upper covering bar 13, and the upper covering bar 13 covers a port of the T-shaped embedding groove 12 and a port of the first embedding groove 11; as shown in fig. 2, 3 and 5, a left embedded groove 21 is formed on the left surface of the vertical frame 2, the left embedded groove 21 extends vertically, the left embedded groove 21 extends to the upper and lower end surfaces of the vertical frame 2, a lower covering strip 22 is covered on the notch of the left embedded groove 21, a second embedded groove 23 is formed on the right surface of the vertical frame 2, the second embedded groove 23 extends vertically, the second embedded groove 23 extends to the upper and lower end surfaces of the vertical frame 2, a right embedded groove 24 is formed on the bottom of the second embedded groove 23, the right embedded groove 24 extends vertically, the right embedded groove 24 extends to the upper and lower end surfaces of the vertical frame 2, and a through hole 25 penetrating through the left embedded groove 21 is formed on the bottom of the right embedded groove 24; as shown in fig. 6 and 7, the connector 3 includes an upper positioning member 31 and a lower positioning member 32; as shown in fig. 7 to 10, the upper positioning assembly 31 includes a positioning block 311, a horizontal movable block 312, a vertical movable block 313, an adjusting screw 314, and a connecting rod 315, the left edge of the top surface of the positioning block 311 is provided with a protruding portion 301, the middle portion of the lower edge of the right wall of the protruding portion 301 is provided with an abdicating notch 302, the middle portion of the lower edge of the left wall of the protruding portion 301 is provided with a countersunk hole 303 penetrating into the abdicating notch 302, the middle portion of the top surface of the positioning block 311 is provided with a through hole 304 penetrating onto the bottom surface of the positioning block 311, the top surface of the horizontal movable block 312 is provided with an inclined guide plane 305, the right edge of the guide plane 305 is higher than the left edge of the guide plane 305, the middle portion of the guide plane 305 is provided with an abdicating hole 306 penetrating onto the bottom surface of the horizontal movable block 312, the left surface of the horizontal movable block 312 is provided with an upper threaded hole 307, the bottom surface of the vertical movable block 313 is provided with a contact plane 308, the right edge of the contact plane 308 is higher than the left edge of the contact plane 308, the horizontal movable block 312 is movably arranged on the top surface of the positioning block 311, the abdicating hole 306 is positioned right above the perforation 304, the adjusting screw 314 is arranged in the counter bore 303, the adjusting screw 314 passes through the abdicating notch 302 and then is screwed on the upper threaded hole 307, the connecting rod 315 is vertically arranged, the upper end of the connecting rod 315 is fixedly connected with the middle part of the contact plane 308, the vertical movable block 313 is movably arranged above the horizontal movable block 312, the contact plane 308 is attached on the guide plane 305, the left surface of the vertical movable block 313 is attached on the right surface of the protruding baffle part 301, and the lower end of the connecting rod 315 sequentially passes through the abdicating hole 306 and the perforation 304 and then is positioned below the positioning block 311; as shown in fig. 1, 6 and 7, the lower positioning assembly 32 includes a left clamping block 321, a right clamping block 322, and a fixing screw 323, a sleeve hole 309 penetrating through a left wall of the left clamping block 321 is formed in a left wall of the left clamping block, a lower threaded hole 310 is formed in a left wall of the right clamping block 322, and a top of the right clamping block 322 is fixedly connected to a lower end of the connecting rod 315; as shown in fig. 1 to 3, the right clamping block 322 is embedded in the right embedding groove 24, the lower threaded hole 310 on the right clamping block 322 is in butt communication with the through hole 25, the upper positioning assembly 31 is also arranged above the upper end part of the vertical frame 2, the left clamping block 321 is embedded in the left embedding groove 21, the sleeve penetrating hole 309 on the left clamping block 321 is in butt communication with the through hole 25, the fixing screw 323 sequentially penetrates the sleeve penetrating hole 309 and the through hole 25 and then is in threaded connection with the lower threaded hole 310, the upper positioning assembly 31 is embedded in the T-shaped embedding groove 12, the connecting rod 315 penetrates through the notch of the first embedding groove 11, and the lower surface of the transverse frame 1 is tightly pressed on the top surface of the vertical frame 2. The first embedding groove 11 and the second embedding groove 23 are arranged to enable the door leaf plate to be embedded, so that the accuracy and the reliability of installation and positioning of the door leaf plate are improved. The left embedded groove 21 and the right embedded groove 24 are provided for the installation and the hiding of the left clamping block 321 and the right clamping block 322, thereby avoiding the influence of the left clamping block 321 and the right clamping block 322 on the aesthetic property of the assembly structure. The end face of the transverse frame 1, the port of the T-shaped embedding groove 12 and the port of the first embedding groove 11 are covered by an upper covering strip 13, and the end face of the transverse frame is covered on the notch of the left embedding groove 21 by a lower covering strip 22; this prevents the aesthetics of the assembled structure from being compromised. Through the above structural design, the horizontal movable block 312 can be pulled to move to the left when the adjusting screw 314 is tightened. Since the horizontal movable block 312 is provided with the guide plane 305, the right edge of the guide plane 305 is higher than the left edge of the guide plane 305; the contact plane 308 on the vertical movable block 313 is attached to the guide plane 305, the right edge of the contact plane 308 is higher than the left edge of the contact plane 308, and the left wall of the vertical movable block 313 is attached to the right wall of the protruding stop portion 301; this causes the vertical movable block 313 to move upward when the horizontal movable block 312 moves leftward. Since the upper and lower ends of the connecting rod 315 are fixed to the vertical movable block 313 and the right clamping block 322, respectively, when the vertical movable block 313 moves upward, the right clamping block 322 can also move upward. Because the upper positioning component 31 is embedded in the T-shaped embedding groove 12, the right clamping block 322 is fixed on the vertical frame 2 through the fixing screw 323, and the lower surface of the horizontal frame 1 is pressed on the top of the vertical frame 2, when the adjusting screw 314 is screwed down, the vertical frame 2 and the horizontal frame 1 can be close to each other and tightly attached together, so that the vertical frame 2 and the horizontal frame 1 can be firmly connected together. Because, this assembly structure can make horizontal frame 1 and vertical frame 2 connect together firmly through screwing up the adjusting screw 314; therefore, the assembly of the horizontal frame 1 and the vertical frame 2 is very convenient. On the contrary, the vertical frame 2 and the horizontal frame 1 are not tightly attached together by unscrewing the adjusting screw 314, so that the upper positioning component 31 can be conveniently moved out of the T-shaped embedding groove 12, and the convenience of detaching the horizontal frame 1 and the vertical frame 2 can be improved. To sum up, the utility model discloses an assembly structure equipment is all very convenient with the dismantlement, and when horizontal frame 1, erect one of frame 2 and appear damaging like this, can be fast with changing the component that damages, need not wholly to scrap, and only need use screwdriver or handle just can realize the dismouting, need not to use the equipment of other specialty, and this use cost and the maintenance cost that helps reducing the user. The fixing screw 323 sequentially penetrates through the sleeve hole 309 and the through hole 25 and then is screwed on the lower threaded hole 310, and the lower threaded hole 310 is formed in the right clamping block 322; through the arrangement of the left clamping block 321 and the right clamping block 322, the structural strength of the screwed part of the fixing screw 323 can be effectively improved, so that the reliability of mounting and fixing the lower positioning assembly 32 is improved, and the reliability of an assembly structure is improved.

Because the transverse frame 1 adopts the aluminum profile structure, the structures such as the first embedded groove 11, the T-shaped embedded groove 12 and the like can be formed at the same time when the transverse frame is formed, and then the required transverse frame 1 can be obtained by cutting. Thus, a large number of the lateral frames 1 can be rapidly manufactured in mass production of the assembled structure.

As shown in fig. 1 and 11, the upper covering strip 13 is a sheet structure, a plurality of embedded convex parts 131 are arranged on the inner wall of the upper covering strip 13, and the size and shape of each embedded convex part 131 are the same as those of the cavity groove at the embedded position; during installation, the embedded convex part 131 is embedded in the T-shaped embedded groove 12 and the process cavity hole on the transverse frame 1, so that the installation and the positioning of the upper covering strip 13 can be realized.

Because the vertical frame 2 adopts an aluminum profile structure, structures such as the left embedded groove 21, the second embedded groove 23, the right embedded groove 24 and the like can be formed in the process of forming, and then the required vertical frame 2 can be obtained by cutting and arranging the through hole 25. This allows a large number of erected frames 2 to be produced quickly in mass production of the assembled structure.

The upper covering strip 13 and the lower covering strip 22 are made of plastic materials, the lower covering strip 22 is of a strip-shaped structure, and protrusions are arranged on the inner surface of the lower covering strip 22. During installation, positioning is realized through the embedding of the protrusions.

The connecting bar 315 and the contact plane 308 are fixed together by welding.

The positioning block 311, the horizontal movable block 312, the vertical movable block 313, the connecting rod 315, the left clamping block 321 and the right clamping block 322 are all made of stainless steel.

The penetrating hole 309 is a counter bore, and the fixing screw 323 is a hexagon socket head cap screw; this reduces the volume occupied by the set screw 323 and the left clamp block 321 when they are assembled.

The connecting rod 315 and the right clamping block 322 are fixed together by welding.

As shown in fig. 1, 6 and 7, in the actual installation process, the left and

right clamping blocks

321 and 322 may be fixed by a plurality of fixing screws 323.

After the components on the assembly structure are assembled, the upper positioning component 31 and the lower positioning component 32 can move close to each other by screwing the adjusting screw 314, and partial structures on the transverse frame 1 can be clamped together by the upper positioning component 31 and the vertical frame 2, so that the vertical frame 2 and the transverse frame 1 can be fixedly connected together.

Claims

1. The utility model provides an assembly structure of aluminium alloy door leaf frame which characterized in that: the connector comprises a transverse frame (1), a vertical frame (2) and a connector (3), wherein a first embedded groove (11) is formed in the bottom surface of the transverse frame (1), the first embedded groove (11) extends transversely, the first embedded groove (11) extends to the left end surface and the right end surface of the transverse frame (1), a T-shaped embedded groove (12) is formed in the bottom of the first embedded groove (11), the T-shaped embedded groove (12) extends transversely, the T-shaped embedded groove (12) extends to the left end surface and the right end surface of the transverse frame (1), upper covering strips (13) are respectively covered on the left end surface and the right end surface of the transverse frame (1), and the upper covering strips (13) cover the ports of the T-shaped embedded groove (12) and the ports of the first embedded groove (11); the left surface of the vertical frame (2) is provided with a left embedded groove (21), the left embedded groove (21) extends vertically, the left embedded groove (21) extends to the upper end surface and the lower end surface of the vertical frame (2), a lower covering strip (22) is covered on a notch of the left embedded groove (21), the right surface of the vertical frame (2) is provided with a second embedded groove (23), the second embedded groove (23) extends vertically, the second embedded groove (23) extends to the upper end surface and the lower end surface of the vertical frame (2), the bottom of the second embedded groove (23) is provided with a right embedded groove (24), the right embedded groove (24) extends vertically, the right embedded groove (24) extends to the upper end surface and the lower end surface of the vertical frame (2), and the bottom of the right embedded groove (24) is provided with a through hole (25) which penetrates into the left embedded groove (21); the connector (3) comprises an upper positioning component (31) and a lower positioning component (32), the upper positioning component (31) comprises a positioning block (311), a horizontal movable block (312), a vertical movable block (313), an adjusting screw rod (314) and a connecting rod (315), a protruding part (301) is arranged on the left edge of the top surface of the positioning block (311), an abdicating notch (302) is arranged in the middle of the lower edge of the right wall of the protruding part (301), a counter sink hole (303) penetrating into the abdicating notch (302) is arranged in the middle of the lower edge of the left wall of the protruding part (301), a through hole (304) penetrating onto the bottom surface of the positioning block (311) is arranged in the middle of the top surface of the positioning block (311), an inclined guide plane (305) is arranged on the top surface of the horizontal movable block (312), and the right edge of the guide plane (305) is higher than the left edge of the guide plane (305), the middle part of the guide plane (305) is provided with an abdicating hole (306) penetrating through the bottom surface of the horizontal movable block (312), the left surface of the horizontal movable block (312) is provided with an upper threaded hole (307), the bottom surface of the vertical movable block (313) is provided with a contact plane (308), the right edge of the contact plane (308) is higher than the left edge of the contact plane (308), the horizontal movable block (312) is movably arranged on the top surface of the positioning block (311) and enables the abdicating hole (306) to be positioned right above the perforation (304), the adjusting screw (314) is arranged in the countersunk hole (303) and enables the adjusting screw (314) to be screwed on the upper threaded hole (307) after passing through the abdicating notch (302), the connecting rod (315) is vertically arranged and enables the upper end of the connecting rod (315) to be fixedly connected with the middle part of the contact plane (308), the vertical movable block (313) is movably arranged above the horizontal movable block (312), the contact plane (308) is attached to the guide plane (305), the left surface of the vertical movable block (313) is attached to the right surface of the convex part (301), and the lower end of the connecting rod (315) sequentially passes through the abdicating hole (306) and the through hole (304) and then is placed below the positioning block (311); the lower positioning assembly (32) comprises a left clamping block (321), a right clamping block (322) and a fixing screw (323), a sleeve penetrating hole (309) penetrating through the left wall of the left clamping block (321) is formed in the left wall of the right clamping block, a lower threaded hole (310) is formed in the left wall of the right clamping block (322), and the top of the right clamping block (322) is fixedly connected with the lower end of the connecting rod (315); the right clamping block (322) is embedded in the right embedded groove (24), a lower threaded hole (310) in the right clamping block (322) is communicated with the through hole (25) in a butt joint mode, the upper positioning assembly (31) is arranged above the upper end portion of the vertical frame (2), the left clamping block (321) is embedded in the left embedded groove (21), a sleeve penetrating hole (309) in the left clamping block (321) is communicated with the through hole (25) in a butt joint mode, the fixing screw (323) penetrates through the sleeve penetrating hole (309) and the through hole (25) in sequence and then is in threaded connection with the lower threaded hole (310), the upper positioning assembly (31) is embedded in the T-shaped embedded groove (12), the connecting rod (315) penetrates out of a notch of the first embedded groove (11), and the lower surface of the transverse frame (1) is tightly pressed on the top surface of the vertical frame (2).