CN217531900U - 3D printing equipment with adjustable printing lines - Google Patents

Abstract

The utility model belongs to the technical field of 3D printing apparatus, concretely relates to print 3D printing apparatus of lines adjustable, include: a fixed mount; the printing table is positioned at the bottom of the fixing frame; the printing mechanism is arranged at the top of the fixed frame and is provided with a printing head; an adjustment mechanism located on the printhead; wherein the adjustment mechanism comprises: a fixed cylinder, the top of which is fixed on the side surface of the printing head and the bottom of which is open; the upper part of the connecting column is rotatably arranged in the fixed cylinder, and the lower part of the connecting column protrudes out of the opening of the fixed cylinder; the adjusting plate is fixedly arranged at the lower part of the connecting column and is positioned between the printing head and the printing table, and the surface of the adjusting plate is provided with a plurality of through holes with different apertures; and the connecting column is rotated to drive the adjusting plate to rotate, so that the printing head is aligned to any through hole to adjust the printing line, the adjusting function of the printing equipment on the printing line is realized, and the printing equipment has more flexibility.

Description

3D printing equipment with adjustable printing lines

Technical Field

The utility model belongs to the technical field of the 3D printing apparatus, concretely relates to print 3D printing apparatus of lines adjustable.

Background

3D printing is a rapid prototyping technology, also known as additive manufacturing, and is a technology for constructing an object by using bondable materials such as powdered metal or plastic and the like and by using a layer-by-layer printing mode on the basis of a digital model file, and the 3D printing is usually realized by adopting a digital technical material printer. The thickness that current 3D printing device printed the lines when using is comparatively single to it is great to lead the limitation when printing device uses easily.

SUMMERY OF THE UTILITY MODEL

The utility model provides a print 3D printing apparatus of lines adjustable through rotating the spliced pole, drives the regulating plate and rotates, makes and beats printer head and aim at the different arbitrary through-hole in aperture to the lines are printed in the regulation.

In order to solve the technical problem, the utility model provides a print 3D printing apparatus of lines adjustable, include: a fixed mount; the printing table is positioned at the bottom of the fixing frame; the printing mechanism is arranged at the top of the fixing frame and is provided with a printing head; an adjustment mechanism located on the printhead; wherein the adjustment mechanism comprises: a fixed cylinder, the top of which is fixed on the side surface of the printing head and the bottom of which is open; the upper part of the connecting column is rotatably arranged in the fixed cylinder, and the lower part of the connecting column protrudes out of the opening of the fixed cylinder; the adjusting plate is fixedly arranged at the lower part of the connecting column and positioned between the printing head and the printing table, and a plurality of through holes with different hole diameters are formed in the plate surface of the adjusting plate; and the rotating connecting column drives the adjusting plate to rotate, so that the printing head is aligned to any through hole to adjust the printing line.

Further, a plurality of clamping grooves are formed in the inner wall of the fixed cylinder along the circumferential direction; at least one bulge is arranged on the side surface of the upper part of the connecting column; the connecting column is rotated to clamp the projections into the corresponding clamping grooves, so that the printing head is aligned to any through hole.

Further, the bulges are even and symmetrically distributed.

Further, the adjusting plate is circular or fan-shaped; the lower part of the connecting column is fixedly arranged at the circle center of the adjusting plate; and the through holes are uniformly distributed along the cambered surface of the adjusting plate, so that the distance between each through hole and the circle center of the adjusting plate is equal.

Further, the printing mechanism includes: the electric push rod is vertically arranged; the fixing frame is positioned at the lower part of the electric push rod and used for mounting the printing head; the electric push rod is suitable for driving the printing head to vertically move up and down so as to enable the printing head to be close to or far away from the printing table.

Furthermore, the 3D printing equipment with the adjustable printing lines further comprises a first moving mechanism positioned above the printing table; the first moving mechanism includes: the screw rod is arranged on the upper part of the fixed frame along the first direction; the guide post is arranged in parallel with the screw rod; the upper part of the adjusting screw block is slidably arranged on the guide post and is matched with the screw rod through threads; and the first driving motor is used for driving the screw rod to rotate so as to enable the adjusting screw block to move along the guide column in the first direction.

Furthermore, the 3D printing equipment with the adjustable printing lines further comprises a second moving mechanism arranged on the first moving mechanism; the second moving mechanism includes: the sliding groove is formed in the lower part of the adjusting screw block along the second direction; the sliding strip is installed in the sliding groove in a matching mode, and the lower surface of the sliding strip is used for installing the printing mechanism; the rack is fixedly arranged on the upper surface of the sliding strip along the second direction; the rotating shaft is rotatably arranged inside the adjusting screw block and is provided with a gear matched with the rack; the second driving motor is positioned inside the adjusting screw block and is used for driving the rotating shaft to rotate; the second driving motor is suitable for driving the sliding strip to move in the sliding groove so as to drive the printing mechanism to move along the second direction.

Further, the first direction and the second direction are both on a horizontal plane and are perpendicular to each other.

Furthermore, the 3D printing equipment with the adjustable printing lines further comprises a leveling mechanism positioned below the fixing frame; the leveling mechanism includes: the horizontal detection column is positioned at the bottom of the fixing frame to detect the horizontal state of the fixing frame; the supporting legs are positioned below the fixed frame and used for supporting the fixed frame; the fixing stud is positioned on the supporting leg, and the surface of the fixing stud is sleeved with a correcting barrel through threads so as to level the fixing frame.

The beneficial effects of the utility model are that, the utility model discloses a print 3D printing apparatus of lines adjustable sets up the regulating plate and beat printer head and print the platform between, is equipped with the different through-hole of a plurality of aperture on its face, through rotating the spliced pole, can drive the regulating plate and rotate, makes and beats printer head and aim at arbitrary through-hole to adjust and print the lines, realized the regulatory function of printing apparatus to printing the lines, thereby make printing apparatus more have the flexibility.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of a 3D printing apparatus;

fig. 2 is a sectional view of the 3D printing apparatus in a front view direction;

FIG. 3 is an enlarged view of detail A of FIG. 2;

FIG. 4 is a cross-sectional view of FIG. 3 in a top view;

FIG. 5 is an enlarged view of detail B of FIG. 2;

in the figure: the printing device comprises a fixed frame 1, a control row key 11, a printing table 2, a printing mechanism 3, an electric push rod 31, a fixed frame 32, a printing head 4, an adjusting mechanism 5, a fixed cylinder 51, a clamping groove 511, a connecting column 52, a protrusion 521, an adjusting plate 53, a through hole 531, a first moving mechanism 6, a screw rod 61, a guide column 62, an adjusting screw block 63, a first driving motor 64, a second moving mechanism 7, a sliding groove 71, a sliding strip 72, a rack 73, a rotating shaft 74, a gear 75, a second driving motor 76, a leveling mechanism 8, a horizontal detection column 81, a supporting leg 82, a fixed stud 83 and a correcting screw cylinder 84.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The existing 3D printing device has the advantages that the thickness of a printing line is single when the printing device is used, so that the limitation of the printing device is large when the printing device is used easily; secondly, the printing head is difficult to realize the function of moving back and forth when the printing device is used, so that the printing accuracy of the printing device is reduced; third, the printing apparatus is not provided with a level correction function when in use, and thus a phenomenon that printing is affected by unevenness in position when the printing apparatus is in use is easily caused. If patent number 201921821049.8 discloses a 3D printing device, including 3D printer body, 3D printer body bottom is equipped with two rows of auxiliary supporting legs, the quantity of every row of auxiliary supporting leg is 4 at least, auxiliary supporting leg includes electric telescopic handle, the dwang, the gyro wheel, spacing magnetic ring, spring and electromagnet, the electric telescopic handle upper end is fixed on 3D printer body, the electric telescopic handle lower extreme is equipped with the recess, the dwang rotates to be connected in the recess, the bottom of dwang is equipped with the gyro wheel, spacing magnetic ring entangles the dwang, the dwang is equipped with the electromagnet, the electromagnet passes through spring coupling spacing magnetic ring, the spring pushes away spacing magnetic ring to the overlapping department of dwang and recess under natural state, the dwang lower extreme is equipped with control switch, control switch and electromagnet electric connection.

For the above reasons, referring to fig. 1 to fig. 5, the present embodiment provides a 3D printing apparatus with adjustable printing lines, including: a fixed mount 1; the printing table 2 is positioned at the bottom of the fixing frame 1; the printing mechanism 3 is arranged at the top of the fixed frame 1 and is provided with a printing head 4; an adjustment mechanism 5 located on the print head 4; wherein the adjusting mechanism 5 comprises: a fixed cylinder 51 having a top fixed to a side surface of the print head 4 and a bottom opened; a connection column 52 having an upper portion rotatably installed in the fixed cylinder 51 and a lower portion protruding through an opening of the fixed cylinder 51; the adjusting plate 53 is fixedly arranged at the lower part of the connecting column 52 and is positioned between the printing head 4 and the printing table 2, and the plate surface of the adjusting plate is provided with a plurality of through holes 531 with different hole diameters; and a rotation connection column 52 for driving the adjustment plate 53 to rotate, so that the print head 4 is aligned with any one of the through holes 531 to adjust the printed lines.

Optionally, referring to fig. 4, a plurality of clamping grooves 511 are formed in the inner wall of the fixed cylinder 51 along the circumferential direction; the upper side surface of the connecting column 52 is provided with at least one bulge 521; the connecting post 52 is rotated until the protrusion 521 is engaged with the corresponding engaging groove 511, so that the print head 4 is aligned with any one of the through holes 531. Preferably, the protrusions 521 are provided in an even number and are symmetrically distributed, so that the connecting posts 53 are prevented from being inclined in the fixed cylinder 51.

Alternatively, referring to fig. 4, the adjusting plate 53 is circular or fan-shaped; the lower part of the connecting column 52 is fixedly arranged at the center of the adjusting plate 53; and the through holes 531 are uniformly distributed along the arc surface of the adjusting plate 53, so that the distance between each through hole 531 and the center of the adjusting plate 53 is equal. The surface of the regulating plate 53 is nearly in contact with the bottom of the print head 4 or a slight movement gap remains. The through holes 531 can be arranged in sequence from large to small along the diameter of the cambered surface, so that printed lines can be adjusted conveniently; when there are only two through holes 531, i.e. the large holes and the small holes are distributed at an interval of 90 degrees, the rotation angle of the connecting column is convenient to position. When using, print through beating printer head 4, the lines is the same with macroporous diameter this moment, if when needing to adjust the line thickness, can manually rotate spliced pole 52, make the arch 521 and the mutual block of draw-in groove 511 of spliced pole 52, drive regulating plate 53 synchronous rotation when spliced pole 52 rotates simultaneously, make the aperture be located beat printer head 4 under, it is thinner to make the printing line, in order to realize the regulatory function of printing equipment to printing the lines, thereby make printing equipment more have the flexibility.

As an alternative embodiment of the first displacement mechanism.

Referring to fig. 1 and fig. 2, the 3D printing apparatus with adjustable printing lines further includes a first moving mechanism 6 located above the printing table 2; the first moving mechanism 6 includes: a screw 61 disposed at an upper portion of the fixing frame 1 along a first direction; the guide post 62 is arranged side by side with the screw 61 and fixed on the inner wall of the fixed frame 1; an adjusting screw 63, the upper part of which is slidably mounted on the guide post 62 and is matched with the screw 61 through threads; and a first driving motor 64 for driving the screw 61 to rotate so as to move the adjusting screw 63 along the guide post 62 in a first direction.

Optionally, referring to fig. 2, a control row key 11 of a control module is arranged on the fixing frame 1, and the model of the control row key can be LA series; the model of first driving motor 64 can select for use JO series, and its input and the output electric connection of control row key 11, the output of first driving motor 64 passes through the shaft coupling to be fixed on screw rod 61, and the surface of screw rod 61 passes through the bearing and the mutual normal running fit of the inner wall of mount 1. When the printer is used, the control row key 11 is operated, so that the control row key 11 controls the first driving motor 64 to work, the screw 61 is driven to rotate under the action of the first driving motor 64, the adjusting screw block 63 is driven to move, the adjusting screw block 63 can be guided under the guide of the guide column 62, and the adjusting screw block 63 drives the printing mechanism to horizontally move left and right (in the left and right directions in fig. 2).

As an alternative embodiment of the second movement mechanism.

Referring to fig. 1, 2 and 5, the 3D printing device with adjustable printing lines further comprises a second moving mechanism 7 mounted on the first moving mechanism 6; the second moving mechanism 7 includes: a chute 71 which is provided at the lower part of the adjusting screw block 63 along the second direction; a slide bar 72 which is arranged in the sliding groove 71 in a matching way, and the lower surface of the slide bar is used for installing the printing mechanism 3; a rack 73 fixedly installed on an upper surface of the slide 72 in the second direction; a rotating shaft 74 rotatably installed inside the adjusting screw block 63 and provided with a gear 75 matched with the rack 73; the second driving motor 76 is positioned inside the adjusting screw block 63 and is used for driving the rotating shaft 74 to rotate; the second driving motor 76 is adapted to drive the slide 72 to move in the slide slot 71, so as to drive the printing mechanism 3 to move in the second direction.

Alternatively, as shown in fig. 5, the sliding groove 71 is approximately cross-shaped, and the top of the sliding groove is open for installing the rotating shaft 74 and the gear 75; the bottom of the sliding groove 71 is open for installing a sliding strip 72. The pivot 74 passes through the bearing and is connected with the inner wall rotation of adjusting spiral shell piece 63 to play limiting displacement, the draw runner 72 is the little T shape structure in the big bottom in top, slides in spout 71 through the top of T shape structure, and the bottom of T shape structure protrudes the bottom opening of spout 71, in order to be used for the installation print mechanism 3's electric putter 31, through the limiting displacement of the inner wall of adjusting spiral shell piece 63 to pivot 74 and the limiting displacement of spout 71 inner wall to T shape structure top, the two combines to make print mechanism hang and installs the lower surface at draw runner 72.

Specifically, the model of the second driving motor 302 may be a JO series, and when the printer is used, the control row key 11 is operated to make the control row key 11 control the second driving motor 76 to work, the rotating shaft 74 is driven to rotate under the action of the second driving motor 76, the gear 75 is driven to rotate, the rack 73 is driven to move back and forth under the meshing action of the gear 75 and the rack 73, the slide bar 72 is driven to move back and forth inside the sliding groove 71, and the printing head 4 is driven to move synchronously, so that the front and back movement (such as the inside and outside direction of paper in fig. 2) of the printing head 4 is realized.

As an alternative embodiment of the printing mechanism.

Referring to fig. 1 and 2, the printing mechanism 3 includes: an electric push rod 31 vertically arranged; a fixing frame 32 located at a lower portion of the electric push rod 31 for mounting the printing head 4; the electric push rod 31 is adapted to move the print head 4 vertically up and down (in the vertical direction in fig. 2) so as to move the print head 4 closer to or farther away from the print table 2. Optionally, TA series can be selected for the model of the electric push rod 31, and the input end of the electric push rod 31 is electrically connected with the output end of the control row key 11, and the output end thereof is fixedly connected with the fixing frame 32.

In the present case, because it installs on printing mechanism 3 to beat printer head 4, printing mechanism 3 installs on second moving mechanism 7, and second moving mechanism 7 installs on first moving mechanism 6, and as shown in fig. 2, the first direction is the level left and right sides direction, and the second direction is the interior outside direction of horizontal paper, and the two is mutually perpendicular and all perpendicular with the vertical motion of beating printer head 4 from top to bottom to guarantee to beat printer head 4 and can realize arbitrary motion in the three-dimensional space that horizontal plane and vertical plane formed, satisfy the displacement requirement of printing, thereby improved the accurate degree that 3D printing apparatus printed when using.

As an alternative embodiment of the printing mechanism.

Referring to fig. 1 and fig. 2, the 3D printing device with an adjustable printing line further includes a leveling mechanism 8 located below the fixing frame 1; the leveling mechanism 8 includes: the horizontal detection column 81 is embedded at the bottom of the fixing frame 1 to detect the horizontal state of the fixing frame 1; a plurality of supporting feet 82 which are positioned below the fixing frame 1 and are used for supporting the fixing frame 1; and a fixing stud 83 positioned on the supporting leg 82, wherein the surface of the fixing stud is sleeved with a correcting screw cylinder 84 through threads so as to level the fixing frame 1.

Alternatively, the level detection post 81 is, for example, but not limited to, a cylindrical level gauge model XL-YZ 0823. When the device is used, the 3D printing device is placed at a specified position, and whether the fixing frame 1 is horizontal or not is checked through the observation horizontal detection column 81; if the printing device is not in a horizontal state, the correcting screw cylinder 84 can be rotated, and the fixing frame 1 is leveled under the threaded matching of the correcting screw cylinder 84 and the fixing stud 83, so that the horizontal correcting function of the 3D printing device is realized, and the phenomenon that the printing is influenced due to uneven position when the printing device is used is avoided.

In order to show the working principle of the 3D printing apparatus more clearly, the working process thereof is described in detail herein as follows:

firstly, the 3D printing apparatus is placed at a designated position, and whether the fixing frame 1 is horizontal is checked by observing the horizontal detection column 81; if not in the horizontal state, the correcting screw cylinder 84 can be rotated, and the fixing frame 1 is leveled under the matching of the correcting screw cylinder 84 and the thread of the fixing stud 83.

Subsequently, the accessible is beaten printer head 4 and is printed the lines and the same with macroporous diameter this moment, if need adjust the lines thickness when, rotatable spliced pole 52 makes the protruding 521 of spliced pole 52 and the mutual block of draw-in groove 511 of one side, drives the synchronous rotation of regulating plate 53 when spliced pole 52 rotates simultaneously, makes the aperture be located and beat printer head 4 under, makes and print the lines thinner.

Through operating the control row key 11, the control row key 11 controls the first driving motor 64 to work, the screw rod 61 is driven to rotate under the action of the first driving motor 64, the adjusting screw block 63 is driven to move, the adjusting screw block 63 can be guided under the action of the guide column 62, the adjusting screw block 63 drives the printing head 4 to move left and right, and meanwhile, the printing head 4 can be driven to move up and down under the action of the electric push rod 31. If the printing head 4 needs to be controlled to move back and forth, the control row key 11 can be operated, so that the control row key 11 controls the second driving motor 76 to work, the rotating shaft 74 is driven to rotate under the action of the second driving motor 76, the gear 75 is driven to rotate, the rack 73 is driven to move back and forth under the meshing action of the gear 75 and the rack 73, the slide bar 72 is driven to move back and forth in the sliding groove 71, and therefore the printing head 4 is driven to move synchronously, the multi-directional movement of the printing head 4 is achieved, and the use work of the 3D printing device is finally completed.

In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the several embodiments provided in the present application, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions when actually implemented, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the description, and must be determined according to the scope of the claims.

Claims (9)

1. The utility model provides a print adjustable 3D printing apparatus of lines, its characterized in that includes:

a fixed mount;

the printing table is positioned at the bottom of the fixing frame;

the printing mechanism is arranged at the top of the fixed frame and is provided with a printing head;

an adjustment mechanism located on the printhead; wherein

The adjustment mechanism includes:

a fixed cylinder, the top of which is fixed on the side surface of the printing head and the bottom of which is open;

the upper part of the connecting column is rotatably arranged in the fixed cylinder, and the lower part of the connecting column protrudes out of the opening of the fixed cylinder;

the adjusting plate is fixedly arranged at the lower part of the connecting column and positioned between the printing head and the printing table, and a plurality of through holes with different hole diameters are formed in the plate surface of the adjusting plate; and

the connecting column is rotated to drive the adjusting plate to rotate, so that the printing head is aligned to any through hole to adjust the printing lines.

2. The 3D printing device with adjustable printing lines according to claim 1,

the inner wall of the fixed cylinder is circumferentially provided with a plurality of clamping grooves;

the side surface of the upper part of the connecting column is provided with at least one bulge;

the connecting column is rotated to clamp the projections into the corresponding clamping grooves, so that the printing head is aligned to any through hole.

3. 3D printing device with adjustable printing lines according to claim 2,

the bulges are even and symmetrically distributed.

4. 3D printing device with adjustable printing lines according to claim 2,

the adjusting plate is circular or fan-shaped;

the lower part of the connecting column is fixedly arranged at the circle center of the adjusting plate; and

the through holes are uniformly distributed along the arc surface of the adjusting plate, so that the distance between each through hole and the circle center of the adjusting plate is equal.

5. The 3D printing device with adjustable printing lines according to claim 1,

the printing mechanism includes:

the electric push rod is vertically arranged;

the fixing frame is positioned at the lower part of the electric push rod and used for mounting the printing head;

the electric push rod is suitable for driving the printing head to vertically move up and down so as to enable the printing head to be close to or far away from the printing table.

6. The 3D printing device with adjustable printing lines according to claim 1,

the 3D printing equipment with the adjustable printing lines further comprises a first moving mechanism positioned above the printing table;

the first moving mechanism includes:

the screw rod is arranged on the upper part of the fixed frame along the first direction;

the guide post is arranged side by side with the screw rod;

the upper part of the adjusting screw block is slidably arranged on the guide post and is matched with the screw rod through threads;

and the first driving motor is used for driving the screw rod to rotate so as to enable the adjusting screw block to move along the guide column in the first direction.

7. The 3D printing device with adjustable printing lines according to claim 6,

the 3D printing equipment with the adjustable printing lines further comprises a second moving mechanism arranged on the first moving mechanism;

the second moving mechanism includes:

the sliding groove is formed in the lower part of the adjusting screw block along the second direction;

the sliding strip is installed in the sliding groove in a matching mode, and the lower surface of the sliding strip is used for installing the printing mechanism;

the rack is fixedly arranged on the upper surface of the sliding strip along the second direction;

the rotating shaft is rotatably arranged inside the adjusting screw block and is provided with a gear matched with the rack;

the second driving motor is positioned inside the adjusting screw block and is used for driving the rotating shaft to rotate;

the second driving motor is suitable for driving the sliding strip to move in the sliding groove so as to drive the printing mechanism to move along the second direction.

8. The 3D printing device with adjustable printing lines according to claim 7,

the first direction and the second direction are both on the horizontal plane and are perpendicular to each other.

9. The 3D printing device with adjustable printing lines according to claim 1,

the 3D printing equipment with the adjustable printing lines further comprises a leveling mechanism positioned below the fixing frame;

the leveling mechanism includes:

the horizontal detection column is positioned at the bottom of the fixing frame to detect the horizontal state of the fixing frame;

the supporting legs are positioned below the fixed frame and used for supporting the fixed frame;

the fixing stud is positioned on the supporting leg, and the surface of the fixing stud is sleeved with a correction screw cylinder through threads so as to level the fixing frame.

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