CN111456295A

CN111456295A - Building curtain wall with adjustable support angle

Info

Publication number: CN111456295A
Application number: CN202010281025.9A
Authority: CN
Inventors: 沈维浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-07-28

Abstract

The invention discloses a building curtain wall with adjustable bracket angles, which comprises a first bracket, a second bracket and four curtain wall plates, wherein the first bracket is fixed on the first bracket; four first support arms are fixedly welded on the outer peripheral wall of the left end of the first column body, a first support ring is fixedly welded at one end of each first support arm, which is far away from the first column body, and each first support ring is fixed with the wall body through a fastener; second support arms are fixedly welded on the outer peripheral wall of the right end of the second column body, a second support ring is fixedly welded at one end, far away from the second column body, of each second support arm, and one corner of each curtain wall plate is supported on one second support ring; two first arc-shaped holes are formed in the first column body, two second arc-shaped holes are formed in the second column body, and a bolt assembly is simultaneously penetrated through each second arc-shaped hole and the first arc-shaped hole in the corresponding position; the invention can ensure the aesthetic degree of the building curtain wall and can avoid the phenomenon of overlarge gap or interference between adjacent curtain walls.

Description

Building curtain wall with adjustable support angle

Technical Field

The invention relates to the technical field of building curtain walls, in particular to a building curtain wall with an adjustable support angle.

Background

The building curtain wall is an outer wall enclosure device used for being fixed on an outer wall of a building, the existing building curtain wall generally comprises a curtain wall plate and a support, when the building curtain wall is installed, the support is fixed on the outer wall of the building, the curtain wall plate is fixed on the support, in addition, one end of the support facing the curtain wall is provided with a plurality of first through holes for bolts to pass through so as to fix the support on the outer wall, and one end of the support facing the curtain wall is provided with a plurality of second through holes for bolts to pass through so as to fix the curtain wall plate on the support; but because assembly error's relation, pass through bolt and wall body fixed back at the support, the installation angle of support can have the deviation, so, after curtain board is fixed to the support, can make the phenomenon that the slope appears in the curtain board, one can influence building curtain's pleasing to the eye degree, two can lead to appearing the phenomenon that the clearance is too big or interfere between the adjacent curtain board.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a building curtain wall with an adjustable bracket angle, which is characterized in that a second bracket and a first bracket are arranged, the second bracket can rotate relative to the first bracket, and the second bracket can be locked by a bolt component after rotating relative to the first bracket, so that when the installation angle of the first bracket deviates, the deviation value can be corrected back by the rotation adjustment of the second bracket and the first bracket, and therefore, after a curtain wall board is assembled with the second bracket, the phenomenon that the curtain wall board inclines can be avoided, the attractiveness of the building curtain wall can be ensured, and the phenomenon that an adjacent curtain wall has overlarge gaps or interference can be avoided.

The invention relates to a building curtain wall with adjustable bracket angles, which comprises a first bracket, a second bracket and four curtain wall plates; the first support comprises a cylindrical first cylinder, four first support arms which are uniformly distributed in the circumferential direction are fixedly welded on the outer circumferential wall of the left end of the first cylinder, a first support ring is fixedly welded at one end, far away from the first cylinder, of each first support arm, and each first support ring is fixed with the wall body through a fastener; the second support comprises a cylindrical second column body, four second support arms which are uniformly distributed in the circumferential direction are fixedly welded on the outer circumferential wall of the right end of the second column body, one end, far away from the second column body, of each second support arm is fixedly welded with a second support ring, one corner of each curtain wall plate is respectively supported on one second support ring, each curtain wall plate is fixed with the second support ring on the corresponding position through first bolts penetrating through the curtain wall plate and the second support ring on the corresponding position, each first bolt movably penetrates through the curtain wall plate on the corresponding position and is in threaded connection with the second support ring on the corresponding position, and the outer edges of adjacent curtain wall plates are mutually attached; set up two first arc holes that are central symmetry and set up in the first cylinder, every first arc hole all extends along the axial direction of first cylinder, set up two second arc holes that are central symmetry and set up in the second cylinder, every second arc hole all extends along the axial direction of second cylinder, every second arc hole all corresponds the setting with one of them first arc hole, all wear to be equipped with a bolt assembly in every second arc hole and the first arc hole on corresponding position simultaneously, second cylinder and first cylinder pass through bolt assembly and lock.

The building curtain wall with the adjustable bracket angle is characterized in that a positioning pin which is coaxial with the first cylinder is integrally formed on the right end face of the first cylinder, a positioning hole which is coaxial with the second cylinder is integrally formed on the left end face of the second cylinder, the right end face of the first cylinder is abutted against the left end face of the second cylinder, the positioning pin is inserted into the positioning hole, the outer peripheral wall of the positioning pin is attached to the inner peripheral wall of the positioning hole, and the positioning pin is rotatably connected with the positioning hole; through the setting of locating pin and locating hole, when second support and first support assemble, the locating pin can insert the locating hole in, so, can realize the location to second support and first support, in addition, when the relative first support of second support rotated, can realize the effect of location between second cylinder and the first cylinder equally.

The building curtain wall with the adjustable bracket angle comprises a plurality of fasteners, wherein each fastener comprises an annular cylinder, an annular convex edge is integrally formed on the outer peripheral wall at the right end of each cylinder, each cylinder is inserted into a drill hole in a wall body, the outer peripheral wall of each cylinder is attached to the inner peripheral wall of the corresponding drill hole, and the annular convex edges are attached to the outer surface of the wall body; the outer peripheral wall of the left end of the barrel is provided with four through holes which are uniformly distributed in the circumferential direction, each through hole extends along the radial direction of the barrel and penetrates through the side wall of the barrel, each through hole is internally provided with a rotary table, each rotary table is rotatably connected with the barrel through a pin shaft penetrating through the rotary table and the barrel, each rotary table is rotatably connected with a corresponding pin shaft, two ends of each pin shaft penetrate through the barrel and are tightly matched with the barrel, barbs extending from right to left are integrally formed at the outer edge of each rotary table, a step for accommodating and supporting the barbs is arranged at the left end of each through hole, and a driving mechanism for driving the rotary tables to rotate is arranged in the barrel; each first support ring is fixed with the cylinder body at the corresponding position through a second bolt, the second bolt is movably arranged in the first support ring in a penetrating mode, and the second bolt is in threaded connection with the inner peripheral wall of the cylinder body; after the fastening piece is adopted, after the barrel body is inserted into a drilled hole in a wall body, the driving mechanism drives the rotary table to rotate, the rotary table can drive the barb to rotate outwards after rotating, and the barb can be tightly clamped with the drilled hole in the wall body after rotating outwards, so that the barrel body can be firmly fastened with the wall body; when actuating mechanism drove carousel antiport, the carousel can drive the barb and inwards rotate, and the barb finally can offset with the step, and the barb can be withdrawed to the barrel this moment, so, can extract the barrel from the drilling of wall body to can reach fastener reuse's purpose.

The building curtain wall with the adjustable bracket angle comprises a stud arranged in a cylinder, wherein the outer peripheral wall of the stud is in threaded connection with the inner peripheral wall of the cylinder, an annular groove is formed in the outer peripheral wall of the stud, a plurality of annular tooth grooves distributed from left to right are formed in the inner peripheral wall of the annular groove, a plurality of teeth used for being meshed with the annular tooth grooves are formed in the inner edge of each rotary table, and a first counter bore in a regular hexagon shape is formed in the right end face of the stud; by adopting the driving mechanism, when an external hexagonal wrench is matched with the first counter bore and the stud is rotated to enable the stud to move leftwards, the turntable can be driven to rotate under the matching action of the annular tooth socket and the teeth, at the moment, the turntable can drive the barb to rotate outwards, and after the barb rotates outwards, the barb can be clamped with a drilled hole of a wall body, so that the barrel body can be firmly fastened with the wall body; when using outer hexagonal spanner and first counter bore cooperation and rotating the double-screw bolt and making the double-screw bolt move right, under the mating reaction of annular tooth's socket and tooth, can drive the carousel and rotate, at this moment, the carousel can drive the barb and inwards rotate, and the barb finally can offset with the step, and the barb can be withdrawed in the barrel this moment, so, can extract the barrel from the drilling of wall body to can reach fastener reuse's purpose.

The building curtain wall with the adjustable bracket angle is characterized in that a threaded hole is formed in the middle of the stud, the threaded hole and the stud are coaxially arranged, a screw is connected in the threaded hole in a threaded manner, the left end of the screw extends out of the stud and is integrally formed with a push plate, and a second counter bore in a regular hexagon shape is formed in the right end face of the screw; through the setting of screw rod and push pedal, under the state in the barrel is taken in to the barb, when using outer hexagonal spanner and second counter bore cooperation and rotate the screw rod and make the screw rod move left, the screw rod can drive the push pedal and move left, move left and offset the back with the interior tip of drilling at the push pedal, it makes the screw rod move left to continuously rotate the screw rod, at this moment, the barrel can be followed and ejecting in the drilling, so, can bring the convenience for the process that the barrel took out from drilling, furthermore, the screw rod is opposite with the screw-thread fit direction of double-screw bolt and barrel.

According to the curtain wall plate, the second support can rotate relative to the first support through the arrangement of the second support and the first support, and the second support can be locked through the bolt assembly after rotating relative to the first support, so that when the installation angle of the first support is deviated, the deviation value can be corrected back through the rotation adjustment of the second support and the first support, and therefore after the curtain wall plate and the second support are assembled, the phenomenon that the curtain wall plate is inclined can be avoided, the attractiveness of a building curtain wall can be guaranteed, and the phenomenon that gaps between adjacent curtain walls are too large or interference can be avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

FIG. 1 is a schematic view of a curtain wall panel secured to a wall by a second bracket and a first bracket;

FIG. 2 is a schematic diagram of a right-view structure of the curtain wall panel fixed to the second bracket;

FIG. 3 is a schematic perspective view of the second bracket connected to the first bracket;

FIG. 4 is a right-view structural diagram of the second bracket fixed to the first bracket;

FIG. 5 is a schematic structural view of the second bracket after being detached from the first bracket;

FIG. 6 is a schematic structural view of the second bracket and the first bracket after being disassembled

FIG. 7 is a schematic cross-sectional view of the assembled fastener and wall;

fig. 8 is a schematic perspective view of the barrel.

Detailed Description

In the following description, for purposes of explanation, numerous implementation details are set forth in order to provide a thorough understanding of the various embodiments of the present invention. It should be understood, however, that these implementation details are not to be interpreted as limiting the invention. That is, in some embodiments of the invention, such implementation details are not necessary. In addition, some conventional structures and components are shown in simplified schematic form in the drawings.

In addition, the descriptions related to the first, the second, etc. in the present invention are only used for description purposes, do not particularly refer to an order or sequence, and do not limit the present invention, but only distinguish components or operations described in the same technical terms, and are not understood to indicate or imply relative importance or implicitly indicate the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The invention relates to a building curtain wall with adjustable bracket angles, which comprises a first bracket 1, a second bracket 2 and four curtain wall plates 3; the first support 1 comprises a cylindrical first cylinder 11, four first support arms 12 which are uniformly distributed in the circumferential direction are fixedly welded on the outer circumferential wall of the left end of the first cylinder 11, a first support ring 13 is fixedly welded at one end, far away from the first cylinder 11, of each first support arm 12, and each first support ring 13 is fixed with the wall 4 through a fastener; the second support 2 comprises a cylindrical second column body 21, four second support arms 22 which are uniformly distributed in the circumferential direction are fixedly welded on the outer circumferential wall of the right end of the second column body 21, a second support ring 23 is fixedly welded on one end, far away from the second column body 21, of each second support arm 22, one corner of each curtain plate 3 is respectively supported on one second support ring 23, each curtain plate 3 is fixed with the second support ring 23 on the corresponding position through first bolts 31 penetrating through the curtain plate 3 and the second support ring 23 on the corresponding position, each first bolt 31 is movably penetrating through the curtain plate 3 on the corresponding position and is in threaded connection with the second support ring 23 on the corresponding position, and the outer edges of the adjacent curtain plates 3 are mutually attached; two first arc-shaped holes 111 which are centrosymmetrically arranged are formed in the first cylinder 11, each first arc-shaped hole 111 extends along the axial direction of the first cylinder 11, two second arc-shaped holes 211 which are centrosymmetrically arranged are formed in the second cylinder 21, each second arc-shaped hole 211 extends along the axial direction of the second cylinder 21, each second arc-shaped hole 211 is arranged corresponding to one first arc-shaped hole 111, each second arc-shaped hole 211 and the first arc-shaped hole 111 on the corresponding position are simultaneously penetrated with a bolt assembly 6, and the second cylinder 21 and the first cylinder 11 are locked through the bolt assemblies 6; according to the curtain wall plate, the second support can rotate relative to the first support, and the second support can be locked through the bolt assembly after rotating relative to the first support, so that when the installation angle of the first support is deviated (namely after the first support is fixed with a wall body through a fastening piece, a connecting line between the center of the first support ring positioned on the front side and the center of the first support ring positioned on the rear side is not in a horizontal state), the deviation value can be corrected back through rotation adjustment of the second support and the first support, and therefore after the curtain wall plate is assembled with the second support, the phenomenon that the curtain wall plate is inclined can be avoided, the attractiveness of a building curtain wall can be guaranteed, and the phenomenon that gaps between adjacent curtain walls are too large or interfered can be avoided.

A positioning pin 112 coaxially arranged with the first cylinder 11 is integrally formed on the right end face of the first cylinder 11, a positioning hole 212 coaxially arranged with the second cylinder 21 is integrally formed on the left end face of the second cylinder 21, the right end face of the first cylinder 11 abuts against the left end face of the second cylinder 21, the positioning pin 112 is inserted into the positioning hole 212, the outer peripheral wall of the positioning pin 112 is attached to the inner peripheral wall of the positioning hole 212, and the positioning pin 112 is rotatably connected with the positioning hole 212; through the setting of locating pin and locating hole, when second support and first support assemble, the locating pin can insert the locating hole in, so, can realize the location to second support and first support, in addition, when the relative first support of second support rotated, can realize the effect of location between second cylinder and the first cylinder equally.

Each fastener comprises an annular cylinder body 61, an annular convex edge 611 is integrally formed on the outer peripheral wall of the right end of the cylinder body 61, the cylinder body 61 is inserted into the drill hole 41 in the wall body 4, the outer peripheral wall of the cylinder body 61 is attached to the inner peripheral wall of the drill hole 41, and the annular convex edge 611 is attached to the outer surface of the wall body 4; the outer peripheral wall of the left end of the cylinder body 61 is provided with four through holes 612 which are uniformly distributed in the circumferential direction, each through hole 612 extends along the radial direction of the cylinder body 61 and penetrates through the side wall of the cylinder body 61, a rotating disc 62 is arranged in each through hole 612, each rotating disc 62 is rotatably connected with the cylinder body 61 through a pin shaft 63 penetrating through the rotating disc 62 and the cylinder body 61, each rotating disc 62 is rotatably connected with the corresponding pin shaft 63, two ends of each pin shaft 63 penetrate through the cylinder body 61 and are tightly matched with the cylinder body 61, an barb 621 extending from right to left is integrally formed at the outer edge of each rotating disc 62, a step 613 for accommodating and supporting the barb 621 is arranged at the left end of each through hole 612, and a driving mechanism for driving the rotating disc 62 to rotate is arranged in the cylinder body 61; each first supporting ring 13 is fixed with the cylinder 61 at the corresponding position through a second bolt 7, the second bolt 7 is movably arranged in the first supporting ring 13 in a penetrating way, and the second bolt 7 is in threaded connection with the inner peripheral wall of the cylinder 61; after the fastening piece is adopted, after the barrel body is inserted into a drilled hole in a wall body, the driving mechanism drives the rotary table to rotate, the rotary table can drive the barb to rotate outwards after rotating, and the barb can be tightly clamped with the drilled hole in the wall body after rotating outwards, so that the barrel body can be firmly fastened with the wall body; when actuating mechanism drove carousel antiport, the carousel can drive the barb and inwards rotate, and the barb finally can offset with the step, and the barb can be withdrawed to the barrel this moment, so, can extract the barrel from the drilling of wall body to can reach fastener reuse's purpose.

The driving mechanism comprises a stud 64 arranged in the cylinder body 61, the outer peripheral wall of the stud 64 is in threaded connection with the inner peripheral wall of the cylinder body 61, an annular groove 641 is arranged on the outer peripheral wall of the stud 64, a plurality of annular tooth grooves 642 distributed from left to right are arranged on the inner peripheral wall of the annular groove 641, a plurality of teeth 622 used for being meshed with the annular tooth grooves 642 are arranged at the inner edge of each rotating disc 62, and a first counter bore 643 in a regular hexagonal shape is arranged on the right end face of the stud 64; by adopting the driving mechanism, when an external hexagonal wrench is matched with the first counter bore and the stud is rotated to enable the stud to move leftwards, the turntable can be driven to rotate under the matching action of the annular tooth socket and the teeth, at the moment, the turntable can drive the barb to rotate outwards, and after the barb rotates outwards, the barb can be clamped with a drilled hole of a wall body, so that the barrel body can be firmly fastened with the wall body; when using outer hexagonal spanner and first counter bore cooperation and rotating the double-screw bolt and making the double-screw bolt move right, under the mating reaction of annular tooth's socket and tooth, can drive the carousel and rotate, at this moment, the carousel can drive the barb and inwards rotate, and the barb finally can offset with the step, and the barb can be withdrawed in the barrel this moment, so, can extract the barrel from the drilling of wall body to can reach fastener reuse's purpose.

A threaded hole 644 is formed in the middle of the stud 64, the threaded hole 644 and the stud 64 are coaxially arranged, a screw 65 is connected in the threaded hole 644 in a threaded manner, the left end of the screw 65 extends out of the stud 64 and is integrally formed with a push plate 651, and a second counter bore 652 in a regular hexagonal shape is formed in the right end face of the screw 65; through the setting of screw rod and push pedal, under the state in the barrel is taken in to the barb, when using outer hexagonal spanner and second counter bore cooperation and rotate the screw rod and make the screw rod move left, the screw rod can drive the push pedal and move left, move left and offset the back with the interior tip of drilling at the push pedal, it makes the screw rod move left to continuously rotate the screw rod, at this moment, the barrel can be followed and ejecting in the drilling, so, can bring the convenience for the process that the barrel took out from drilling, furthermore, the screw rod is opposite with the screw-thread fit direction of double-screw bolt and barrel.

When the device is installed, firstly, a drill hole corresponding to each first support ring is formed in a wall body, then a barrel in a fastener is inserted into the drill hole, then the stud is rotated to drive the rotary disc and the barb to rotate, the barb is fastened with the drill hole after rotating, then each first support ring in the first support is fixed with the barrel at the corresponding position through the second bolt, then whether two second support rings positioned above in the second support are in a horizontal state or not is measured by a level gauge, if the two second support rings positioned above in the second support are not in the horizontal state, the bolt assembly is unscrewed and the second support is rotated relative to the first support, and when the two second support rings positioned above in the second support are rotated to the horizontal state, the bolt assembly is screwed, at the moment, the correction of the deviation of the installation angle of the first support is realized, and finally, fixing the corners of the curtain wall plate on the second support ring in the second support through the first bolts.

The above description is only an embodiment of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides a building curtain with adjustable support angle which characterized in that: comprises a first bracket (1), a second bracket (2) and four curtain wall plates (3); the first support (1) comprises a cylindrical first cylinder (11), four first support arms (12) which are uniformly distributed in the circumferential direction are fixedly welded on the circumferential wall of the left end of the first cylinder (11), a first support ring (13) is fixedly welded at one end, far away from the first cylinder (11), of each first support arm (12), and each first support ring (13) is fixed with the wall body (4) through a fastener; the second support (2) comprises a cylindrical second column body (21), four second support arms (22) which are uniformly distributed in the circumferential direction are fixedly welded on the outer circumferential wall of the right end of the second column body (21), one end, far away from the second column body (21), of each second support arm (22) is fixedly welded with a second support ring (23), one corner of each curtain wall plate (3) is respectively supported on one second support ring (23), each curtain wall plate (3) is fixed with the second support ring (23) in the corresponding position through a first bolt (31) penetrating through the curtain wall plate (3) and the second support ring (23) in the corresponding position, each first bolt (31) is movably penetrating through the curtain wall plate (3) in the corresponding position and is in threaded connection with the second support ring (23) in the corresponding position, and the outer edges of adjacent curtain wall plates (3) are mutually attached; set up two first arc holes (111) that are central symmetry and set up in first cylinder (11), every first arc hole (111) all extends along the axial direction of first cylinder (11), set up two second arc holes (211) that are central symmetry and set up in second cylinder (21), every second arc hole (211) all extends along the axial direction of second cylinder (21), every second arc hole (211) all corresponds the setting with one of them first arc hole (111), all wear to be equipped with a bolt assembly (6) simultaneously in every second arc hole (211) and the first arc hole (111) that correspond on the position, second cylinder (21) and first cylinder (11) are locked through bolt assembly (6).

2. The bracket angle-adjustable building curtain wall according to claim 1, wherein a positioning pin (112) coaxially arranged with the first cylinder (11) is integrally formed on the right end surface of the first cylinder (11), a positioning hole (212) coaxially arranged with the second cylinder (21) is integrally formed on the left end surface of the second cylinder (21), the right end surface of the first cylinder (11) and the left end surface of the second cylinder (21) abut against each other, the positioning pin (112) is inserted into the positioning hole (212), the outer peripheral wall of the positioning pin (112) abuts against the inner peripheral wall of the positioning hole (212), and the positioning pin (112) is rotatably connected with the positioning hole (212).

3. The bracket angle-adjustable building curtain wall as claimed in claim 1, wherein each fastener comprises a circular cylinder (61), an annular flange (611) is integrally formed on the outer peripheral wall of the right end of the cylinder (61), the cylinder (61) is inserted into a drill hole (41) in the wall body (4), the outer peripheral wall of the cylinder (61) is attached to the inner peripheral wall of the drill hole (41), and the annular flange (611) is attached to the outer surface of the wall body (4); the outer peripheral wall of the left end of the barrel body (61) is provided with four through holes (612) which are uniformly distributed in the circumferential direction, each through hole (612) extends along the radial direction of the barrel body (61) and penetrates through the side wall of the barrel body (61), each through hole (612) is internally provided with a rotary disc (62), each rotary disc (62) is rotatably connected with the barrel body (61) through a pin shaft (63) penetrating through the rotary discs (62) and the barrel body (61), each rotary disc (62) is rotatably connected with a corresponding pin shaft (63), two ends of each pin shaft (63) are respectively penetrated through the barrel body (61) and tightly matched with the barrel body (61), barbs (621) extending from right to left are integrally formed at the outer edge of each rotary disc (62), a step (613) used for accommodating and supporting the barbs (621) is arranged at the left end of each through hole (612), a driving mechanism for driving the rotating disc (62) to rotate is arranged in the cylinder body (61); every first support ring (13) all is fixed with barrel (61) on the corresponding position through second bolt (7), second bolt (7) activity is worn to establish in first support ring (13), the internal perisporium threaded connection of second bolt (7) and barrel (61).

4. The bracket angle-adjustable building curtain wall according to claim 3, wherein the driving mechanism comprises a stud (64) arranged in the cylinder body (61), the outer peripheral wall of the stud (64) is in threaded connection with the inner peripheral wall of the cylinder body (61), an annular groove (641) is arranged on the outer peripheral wall of the stud (64), a plurality of annular tooth grooves (642) distributed from left to right are arranged on the inner peripheral wall of the annular groove (641), a plurality of teeth (622) for being meshed with the annular tooth grooves (642) are arranged at the inner edge of each rotary disc (62), and a first counter bore (643) in a shape of a regular hexagon is arranged on the right end face of the stud (64).

5. The building curtain wall with the adjustable bracket angle of claim 4, wherein a threaded hole (644) is formed in the middle of the stud (64), the threaded hole (644) and the stud (64) are coaxially arranged, a screw rod (65) is connected in the threaded hole (644) in a threaded manner, the left end of the screw rod (65) extends out of the stud (64) and is integrally formed with a push plate (651), and a second counter bore (652) in a regular hexagonal shape is formed in the right end face of the screw rod (65).