CN220390330U - 3D printer convenient to change shower nozzle - Google Patents

Abstract

The utility model discloses a 3D printer convenient for replacing a spray head, which belongs to the technical field of 3D printing and comprises a 3D printer, a fixing frame, a printing table, a material box, an electric telescopic rod, a support frame A, a screw rod slide rail A, a support frame B, a screw rod slide rail B, a printing frame, an electric heating tube, a printing spray head and a material guide pipe, wherein the fixing frame is fixedly arranged above the 3D printer, the material box is fixedly arranged above the fixing frame, and the electric telescopic rods are fixedly arranged at two sides below the fixing frame. According to the utility model, the printing spray head is pulled to slide out of the mounting groove A, then the printing spray head to be used is slid into the mounting groove A, then the printing spray head is rotated to drive the limiting frame A to be close to the limiting frame A, the limiting frame B is extruded to shrink through the damping telescopic rod A and the outer side spring and is close to the limiting groove A, after the damping telescopic rod A and the outer side spring are ejected out of the limiting frame B to slide into the inner side of the limiting groove A, the printing spray head is limited, the printing spray head is replaced, and the printing spray head can be conveniently detached and installed by staff.

Description

3D printer convenient to change shower nozzle

Technical Field

The utility model belongs to the technical field of 3D printing, and particularly relates to a 3D printer with a spray head convenient to replace.

Background

3D printing is a technology for constructing an object in a layered printing manner based on a digital model by using a material that can be thermally bonded such as plastic or powdered metal, and thus, a 3D printer that facilitates replacement of a head is required.

According to the searching, the application number is CN202121794711.2, the spray head convenient to replace is used for the 3D printer, the spray head convenient to replace is provided with the spray head convenient to replace, the first bearing drives the clamping block to move in the direction away from the fixed block, so that the spray nozzle can be taken down, the novel spray nozzle drives the fixed block to reversely rotate the bolt when the inside of the strip-shaped groove slides to the top position, the bolt can drive the clamping block to transversely move in the threaded hole through the first bearing when the bolt rotates in the threaded hole, the clamping block can drive the sliding block to slide in the sliding groove when the clamping block moves to the surface of the fixed block, and the position of the spray nozzle can be fixed, so that the spray nozzle is convenient to replace; the disadvantages are as follows:

when the spray head convenient to replace is used by a worker, the rotary bolt can drive the clamping block to move in the direction away from the fixed block through the first bearing when the printing spray head is replaced, so that the spray nozzle can be taken down, the spray nozzle is installed in a detachable reverse mode, and the printing spray head is limited through the clamping block by the rotary bolt.

Disclosure of Invention

The utility model aims at: in order to solve the problem that the spray head convenient to replace for the 3D printer is slightly inconvenient when the spray head is replaced, the 3D printer convenient to replace the spray head is provided.

The technical scheme adopted by the utility model is as follows: the utility model provides a 3D printer convenient to change shower nozzle, includes 3D printer, mount, print pad, magazine, electric telescopic handle, support frame A, lead screw slide rail A, support frame B, lead screw slide rail B, print frame, electrothermal tube, print shower nozzle and passage, 3D printer top fixed mounting has the mount, mount top fixed mounting has the magazine, mount below both sides fixed mounting has electric telescopic handle, fixed mounting has support frame A between the electric telescopic handle end below, support frame A below fixed mounting has lead screw slide rail A, lead screw slide rail A below is provided with support frame B through the slider slip, support frame B below fixed mounting has lead screw slide rail B, lead screw slide rail B below is provided with the print frame through the slider slip, the inside below slip of print frame is provided with the print shower nozzle, the embedding of print frame top is provided with the passage, the inside below of print frame is close to print shower nozzle embedding and is provided with the electrothermal tube, and the electrothermal tube is the heliciform and encircle the setting, 3D printer top is close to print frame below fixed mounting, but print pad below fixed mounting has, support frame B is provided with support frame B through the slider slip, support frame B below fixed mounting has the cooling mechanism to take out the inside cooling to print the cooling to the inside of print frame, but the cooling mechanism is provided with the cooling to take out the material.

The rotary limiting mechanism comprises a mounting groove A, a limiting frame A, a limiting groove A, a limiting block A, a damping telescopic rod A and a limiting block B, wherein the mounting groove A is embedded in the lower portion of the printing frame, the mounting groove A is arranged in an annular mode, the limiting frame A is fixedly arranged on two sides of the printing spray head and is arranged in an arc mode, the limiting frame A is arranged on the inner side of the mounting groove A in a fit sliding mode, the limiting groove A is arranged in the upper portion and the lower portion of the side of the limiting frame A in an embedding mode in an arc mode in a corresponding mode, the limiting groove A is arranged in an arc mode, the limiting block A is fixedly arranged on two sides of the inner wall of the mounting groove A, the damping telescopic rod A is fixedly arranged on the upper portion and the lower portion of the limiting block A, a spring is arranged on the outer side of the damping telescopic rod A in a matching mode, the end portion of the damping telescopic rod A is fixedly arranged on the limiting block B, the limiting block B is arranged in an arc mode, and the limiting block B is arranged on the inner side of the limiting groove A in a fit sliding mode.

The consumable guiding mechanism is composed of a sliding chute A, a damping telescopic rod B, an adjusting frame and electric conveying rollers, wherein the sliding chute A is embedded in two sides of the upper portion of the printing frame, the adjusting frame is slidably arranged above the inner portion of the sliding chute A, the damping telescopic rod B is fixedly installed between the side of the adjusting frame and the side of the inner wall of the sliding chute A, a spring is arranged on the outer side of the damping telescopic rod B in a matched mode, the electric conveying rollers are arranged on the side of the adjusting frame in a relatively rotating mode through bearings, and the outer ring of each electric conveying roller is made of butadiene rubber.

The swing cooling mechanism comprises a support frame C, a sliding chute B, a movable frame, a fan, a dustproof net rack, a servo motor and eccentric wheels, wherein the support frame C is fixedly arranged on two sides of the printing frame, the sliding chute B is embedded in the upper side of the support frame C, the movable frame is arranged on the side of the support frame C in a rotating mode through a rotating shaft, the side of the movable frame is arranged on the inner side of the sliding chute B in a sliding mode, the fan is arranged in the movable frame, the dustproof net rack is connected to the upper side and the lower side of the movable frame through bolts, the servo motor is fixedly arranged on the upper side of the support frame C, and the servo motor is connected with the eccentric wheels through an output shaft.

In summary, due to the adoption of the technical scheme, the beneficial effects of the utility model are as follows:

1. this kind of D printer convenient to change shower nozzle is through being provided with rotation stop gear, can make the staff pass through mounting groove A, spacing groove A, stopper A, damping telescopic link A and stopper B between the cooperation, utilizes stopper A to pass through damping telescopic link A and outside spring freedom in the inboard spacing mode of sliding of spacing groove A, makes things convenient for the staff to dismantle the effect of installing the shower nozzle of printing.

2. This kind of D printer convenient to change shower nozzle is through being provided with consumptive material guiding mechanism, can make the staff pass through spout A, damping telescopic link B, cooperation between alignment jig and the electronic conveying roller, utilizes electronic conveying roller through damping telescopic link B and the freely flexible mode of outside spring, makes things convenient for the staff when needs change the printing shower nozzle, can take out the effect of different specification plastic wire materials in the use fast.

3. This kind of D printer convenient to change shower nozzle is through being provided with swing cooling body, can make the staff pass through between support frame C, spout B, adjustable shelf, fan, the dustproof rack, servo motor and the eccentric wheel cooperation, utilizes servo motor to drive the eccentric wheel and rotates, constantly beats adjustable shelf and fan through the repeated wobbling mode of pivot, improves the effect of carrying out high-efficient cooling treatment to the article in the printing.

Drawings

FIG. 1 is a schematic diagram of a schematic perspective view of a 3D printer of the present utility model;

FIG. 2 is a schematic diagram of a front cross-sectional structure of a 3D printer according to the present utility model;

FIG. 3 is a schematic diagram of the enlarged construction of FIG. 2 at A in accordance with the present utility model;

FIG. 4 is a schematic diagram of the enlarged structure of FIG. 2B in accordance with the present utility model;

FIG. 5 is a schematic diagram of the enlarged structure of FIG. 3 at C in accordance with the present utility model;

FIG. 6 is a schematic diagram of a second enlarged construction of the embodiment A of FIG. 2 according to the present utility model.

The marks in the figure: 1. a 3D printer; 101. a fixing frame; 102. a printing table; 103. a magazine; 104. an electric telescopic rod; 105. a supporting frame A; 106. a screw rod sliding rail A; 107. a support B; 108. a screw rod sliding rail B; 2. a print stand; 201. a mounting groove A; 202. an electric heating tube; 203. printing a spray head; 204. a limiting frame A; 205. a limit groove A; 206. a limiting block A; 207. damping telescopic rod A; 208. a limiting block B; 209. a material guiding pipe; 3. a chute A; 301. damping telescopic rod B; 302. an adjusting frame; 303. an electric conveying roller; 4. a support frame C; 401. a chute B; 402. a movable frame; 403. a fan; 404. a dust-proof net rack; 405. a servo motor; 406. an eccentric wheel; 5. a limiting frame B; 501. a limit groove B; 6. a mounting groove B; 601. damping telescopic rod C; 602. and a limiting block C.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the utility model, the following components are added:

embodiment one: referring to fig. 1-6, a 3D printer convenient to change shower nozzle, including 3D printer 1, mount 101, print pad 102, magazine 103, electric telescopic handle 104, support frame a105, lead screw slide rail a106, support frame B107, lead screw slide rail B108, print frame 2, electrothermal tube 202, print shower nozzle 203 and pipe 209,3D printer 1 top fixed mounting has mount 101, mount 101 top fixed mounting has magazine 103, mount 101 below both sides fixed mounting has electric telescopic handle 104, fixed mounting has support frame a105 between the end below of electric telescopic handle 104, support frame a105 below fixed mounting has lead screw slide rail a106, lead screw slide rail a106 below is provided with support frame B107 through the slider slip, support frame B107 below fixed mounting has lead screw slide rail B108, lead screw slide rail B108 below is provided with print frame 2 through the slider slip, print frame 2 inside below is provided with print shower nozzle 203, print frame 2 below is close to print shower nozzle 203 embedding and is provided with electrothermal tube 202, and electrothermal tube 202 is spiral wound around 3D printer 1 below is provided with guide 209, but print frame 2 inside below is close to print frame 2, it has cooling mechanism to take out the inside of the cooling medium, the cooling mechanism is provided with the cooling medium to take out the cooling medium, the inside of the cooling medium is convenient for the printer.

Referring to fig. 2, 3 and 5, further, the rotation limiting mechanism is composed of a mounting groove a201, a limiting frame a204, a limiting groove a205, a limiting block a206, a damping telescopic rod a207 and a limiting block B208;

the lower part of the printing frame 2 is embedded with a mounting groove A201, the mounting groove A201 is in an annular shape, two sides of the printing nozzle 203 are fixedly provided with a limiting frame A204, the limiting frame A204 is in an arc shape, the limiting frame A204 is in fit sliding arrangement at the inner side of the mounting groove A201, the side of the limiting frame A204 is embedded with a limiting groove A205 up and down relatively, the limiting groove A205 is in an arc shape, two sides of the inner wall of the mounting groove A201 are fixedly provided with limiting blocks A206, the upper part and the lower part of the limiting block A206 are fixedly provided with damping telescopic rods A207, the outer side of the damping telescopic rods A207 is provided with springs in a matching way, the end part of the damping telescopic rods A207 is fixedly provided with limiting blocks B208, the limiting blocks B208 are in an arc shape, the limiting blocks B208 are in fit sliding arrangement at the inner side of the limiting groove A205, when a worker needs to replace the designated printing nozzle 203 when the printing treatment of an object by using the 3D printer 1, the printing nozzle 203 below the rotary printing frame 2 rotates at the inner side of the mounting groove A201, the limiting block B208 is extruded to slide out of the limiting groove A205, the damping telescopic rod A207 and the outer side spring are driven to contract, after the limiting block A204 is moved away from the limiting block A206 to loosen the printing nozzle 203, the printing nozzle 203 is pulled to slide out of the mounting groove A201, the printing nozzle 203 which is needed to be used is slid into the mounting groove A201, the printing nozzle 203 is rotated to drive the limiting block A204 to be close to the limiting block A206, the limiting block B208 is extruded to contract through the damping telescopic rod A207 and the outer side spring and close to the limiting groove A205, after the damping telescopic rod A207 and the outer side spring are ejected out of the limiting block B208 to slide into the inner side of the limiting groove A205, the printing nozzle 203 is limited to be replaced, and the printing nozzle 203 is conveniently detached and installed by workers.

Referring to fig. 1 to 3, further, the consumable guiding mechanism is composed of a chute A3, a damping telescopic rod B301, an adjusting frame 302 and an electric conveying roller 303;

a chute A3 is embedded in the two sides above the printing frame 2, an adjusting frame 302 is arranged above the inside of the chute A3 in a sliding manner, a damping telescopic rod B301 is fixedly arranged between the side of the adjusting frame 302 and the side of the inner wall of the chute A3, springs are arranged on the outer side of the damping telescopic rod B301 in a matching manner, an electric conveying roller 303 is arranged on the side of the adjusting frame 302 in a rotating manner through a bearing, the outer ring of the electric conveying roller 303 is made of butadiene rubber, when a worker finishes replacing the printing nozzle 203, plastic wires in the material box 103 are pulled out, the two adjusting frames 302 are pushed to drive the damping telescopic rod B301 and the outer springs to shrink and expand the electric conveying roller 303, the plastic wires are slid between the material guide pipe 209 and the inner side of the printing nozzle 203, the adjusting frame 302 is loosened, the damping telescopic rod B301 and the outer springs are ejected out of the adjusting frame 302, the conveying roller 303 is respectively contacted with the two sides of the plastic wires, after limiting the plastic wire, a worker controls the electric telescopic rod 104 to lower the printing nozzle 203 to be close to the printing table 102, then controls the screw rod sliding rail A106 and the screw rod sliding rail B108 to drive the printing nozzle 203 to move towards a designated position through a sliding block, then opens a servo motor matched with the electric heating tube 202 and the electric conveying roller 303 to heat and soften the plastic wire, drives the electric conveying roller 303 to rotate through the servo motor matched with the electric conveying roller 303, softens the plastic wire and sends out the plastic wire to perform 3D printing treatment, when the worker needs to replace the printing nozzle 203 again, controls the servo motor matched with the electric conveying roller 303 to drive the electric conveying roller 303 to reversely rotate, rapidly pushes out the plastic wire to slide out of the material guide pipe 209, and enables the worker to quickly replace the printing nozzle 203, thereby facilitating the worker to replace the printing nozzle 203, the plastic wire materials with different specifications in use can be quickly taken out.

Referring to fig. 1, 2 and 4, further, the swing cooling mechanism is composed of a supporting frame C4, a chute B401, a movable frame 402, a fan 403, a dust-proof net frame 404, a servo motor 405 and an eccentric wheel 406;

the printing frame 2 both sides fixed mounting has support frame C4, support frame C4 top embedding is provided with spout B401, support frame C4 side rotates through the pivot and is provided with movable frame 402, and movable frame 402 side slip sets up in spout B401 inboard, movable frame 402 internally mounted has fan 403, there is dustproof rack 404 below movable frame 402 through bolted connection, support frame C4 top fixed mounting has servo motor 405, servo motor 405 has eccentric wheel 406 through output shaft, when staff control electric telescopic handle 104 descends print shower nozzle 203 and is close to print bench 102, control lead screw slide rail A106 and lead screw slide rail B108 drive print shower nozzle 203 through the slider and remove towards the assigned position, open the servo motor that electrothermal tube 202 and electric conveying roller 303 are supporting again, make electrothermal tube 202 heat the plastics wire material soften, and drive electric conveying roller 303 rotation through the servo motor that electric conveying roller 303 is supporting, when carrying out 3D print processing with the plastics wire material softening, open two servo motors 405 and drive eccentric wheel 406 and rotate, make eccentric wheel 406 constantly hit the movable frame 402 and beat the fan 403 and carry out the high-range in the uniform deformation of cooling in the print processing in the cooling in the fan that the staff opens the swing and can prevent the thermal deformation of print article from leading to the high-efficient in the cooling treatment of the print in the place of the swing.

Referring to fig. 1-5, further, the electric conveying roller 303 is electrically connected with the storage battery through a matched servo motor and a control panel, and the electric telescopic rod 104, the screw rod sliding rail a106, the screw rod sliding rail B108, the electric heating tube 202, the fan 403 and the servo motor 405 are electrically connected with the storage battery through the control panel.

Embodiment two:

as shown in fig. 6, a mounting groove a201 is embedded below a printing frame 2, the mounting groove a201 is annularly arranged, two sides of a printing nozzle 203 are fixedly provided with a limiting frame a204, the limiting frame a204 is arc-shaped, the limiting frame a204 is fit and slide arranged inside the mounting groove a201, a limiting groove a205 is embedded in the side of the limiting frame a204 up and down relatively, the limiting groove a205 is arc-shaped, two sides of the inner wall of the mounting groove a201 are fixedly provided with a limiting block a206, a damping telescopic rod a207 is fixedly arranged above and below the limiting block a206, the outer side of the damping telescopic rod a207 is provided with a spring in a matching way, the end part of the damping telescopic rod a207 is fixedly provided with a limiting block B208, the limiting block B208 is arc-shaped, and the limiting block B208 is fit and slide arranged inside the limiting groove a205, in addition to the embodiment, another embodiment is also provided with a mounting groove B6 embedded in the two sides below the printing frame 2, the two sides of the printing nozzle 203 are fixedly provided with a limiting frame B5, the limiting frame B5 is matched and slidingly arranged on the inner side of a mounting groove B6, the side of the limiting frame B5 is embedded and provided with a limiting groove B501, the limiting groove B501 is in a trapezoid shape, the side of the inner wall of the mounting groove B6 is fixedly provided with a damping telescopic rod C601, the outer side of the damping telescopic rod C601 is matched with a spring, the side of the end part of the damping telescopic rod C601 is fixedly provided with a limiting block C602, the limiting block C602 is in a trapezoid shape, the limiting block C602 is matched and slidingly arranged on the inner side of the limiting groove B501, when a worker needs to replace the printing nozzle 203, the printing nozzle 203 is pulled to push the limiting block C602 to slide out of the limiting groove B501, the damping telescopic rod C601 and the outer spring are driven to shrink and loosen the printing nozzle 203 to be disassembled, the needed printing nozzle 203 is driven to slide under the printing frame 2, the limiting frame B5 is driven to slide into the mounting groove B6, the limiting block C602 is extruded to drive the damping telescopic rod C601 and the outer spring to shrink, after the limiting block C602 is close to the limiting groove B501, the damping telescopic rod C601 and the outer spring pop-up limiting block C602 slide into the inner side of the limiting groove B501, and the installation of the printing nozzle 203 is completed.

Working principle: firstly, when a worker needs to use a 3D printer 1 to print objects and replace a designated printing nozzle 203, a servo motor matched with an electric conveying roller 303 is controlled to drive the electric conveying roller 303 to reversely rotate, a plastic wire is rapidly pushed out to slide out of a material guide pipe 209, the printing nozzle 203 below a rotating printing frame 2 rotates at the inner side of a mounting groove A201, a limiting block B208 is extruded to slide out of a limiting groove A205, a damping telescopic rod A207 and an outer spring are driven to shrink, after the limiting frame A204 is moved away from the limiting block A206 to loosen the printing nozzle 203, the printing nozzle 203 is pulled to slide out of the mounting groove A201, the printing nozzle 203 to be used is slid into the mounting groove A201, the printing nozzle 203 is rotated to drive the limiting frame A204 to be close to the limiting block A206, the limiting block B208 is extruded to shrink through the damping telescopic rod A207 and the outer spring and the inner side of the limiting groove A205 is ejected out of the limiting block B208 by the damping telescopic rod A207 and the outer spring after the limiting block A205 is approached, after the printing nozzle 203 is limited and the printing nozzle 203 is replaced, a worker pulls out the plastic wire in the material box 103 and pushes two adjusting frames 302 to drive a damping telescopic rod B301 and an outer spring to shrink and expand an electric conveying roller 303, then the plastic wire is slid between a material guiding pipe 209 and the inner side of the printing nozzle 203, the adjusting frames 302 are loosened, the damping telescopic rod B301 and the outer spring pop up the conveying roller 303 at the side Fang Diandong of the adjusting frame 302 to respectively contact with two sides of the plastic wire, after the plastic wire is limited, the worker controls the electric telescopic rod 104 to lower the printing nozzle 203 to be close to the printing table 102, then controls a screw slide rail A106 and a screw slide rail B108 to drive the printing nozzle 203 to move towards a designated position through a sliding block, and then opens a servo motor matched with the electric heating pipe 202 and the electric conveying roller 303 to heat and soften the plastic wire by the electric heating pipe 202, and drive the rotation of electronic conveying roller 303 through the supporting servo motor of electronic conveying roller 303, send out the plastics wire material and carry out 3D and print when softening, finally, the staff opens two servo motor 405 and drives eccentric wheel 406 and rotate, makes eccentric wheel 406 constantly beat movable frame 402 and swings through the pivot, and the staff opens the fan 403 in the swing and carries out the cooling treatment of evenly blowing on a large scale to the article in the printing.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the utility model.

Claims (7)

1. The utility model provides a 3D printer convenient to change shower nozzle, includes 3D printer (1), mount (101), print pad (102), magazine (103), electric telescopic handle (104), support frame A (105), lead screw slide rail A (106), support frame B (107), lead screw slide rail B (108), print frame (2), electrothermal tube (202), print shower nozzle (203) and feed guide pipe (209), 3D printer (1) top fixed mounting has mount (101), mount (101) top fixed mounting has magazine (103), mount (101) below both sides fixed mounting has electric telescopic handle (104), fixed mounting has support frame A (105) between electric telescopic handle (104) tip below, support frame A (105) below fixed mounting has lead screw slide rail A (106), lead screw slide rail A (106) below is provided with support frame B (107) through the slider slip, support frame B (107) below fixed mounting has lead screw B (108), lead screw slide rail B (108) below is provided with print frame (2) through the slider slip, inside slide frame (203) is provided with the feed guide pipe (209), the utility model discloses a printer is characterized in that print frame (2) inside below is close to and prints shower nozzle (203) outer lane embedding and is provided with electrothermal tube (202), and electrothermal tube (202) are the heliciform and encircle the setting, 3D printer (1) top is close to print frame (2) below fixed mounting has print table (102), its characterized in that: the utility model discloses a printing frame (2) is provided with the rotation stop gear who makes things convenient for the staff to change the print head below, the inside top of printing frame (2) is provided with the consumptive material guiding mechanism who conveniently carries and take out different specification plastics wire rods, printing frame (2) both sides are provided with the swing cooling mechanism that can carry out rapid cooling treatment to the material that prints out.

2. A 3D printer for facilitating replacement of a spray head as claimed in claim 1, wherein: the rotation limiting mechanism consists of a mounting groove A (201), a limiting frame A (204), a limiting groove A (205), a limiting block A (206), a damping telescopic rod A (207) and a limiting block B (208);

the printing device is characterized in that an installation groove A (201) is embedded below the printing frame (2), two sides of the printing spray head (203) are fixedly provided with a limiting frame A (204), the limiting frame A (204) is arranged on the inner side of the installation groove A (201) in a matched sliding mode, the limiting frame A (204) is provided with a limiting groove A (205) in a vertically opposite mode, two sides of the inner wall of the installation groove A (201) are fixedly provided with limiting blocks A (206), damping telescopic rods A (207) are fixedly arranged on the upper side and the lower side of the limiting blocks A (206), springs are arranged on the outer side of the damping telescopic rods A (207) in a matched mode, limiting blocks B (208) are fixedly arranged at the end portions of the damping telescopic rods A (207), and the limiting blocks B (208) are arranged on the inner side of the limiting grooves A (205) in a matched sliding mode.

3. A 3D printer for facilitating replacement of a spray head as claimed in claim 1, wherein: the consumable guiding mechanism consists of a chute A (3), a damping telescopic rod B (301), an adjusting frame (302) and an electric conveying roller (303);

the printing frame is characterized in that sliding grooves A (3) are embedded in two sides above the printing frame (2), an adjusting frame (302) is slidably arranged above the inner side of the sliding grooves A (3), a damping telescopic rod B (301) is fixedly arranged between the side of the adjusting frame (302) and the side of the inner wall of the sliding grooves A (3), springs are arranged on the outer side of the damping telescopic rod B (301) in a matched mode, and an electric conveying roller (303) is arranged on the side of the adjusting frame (302) in a relative rotation mode through bearings.

4. A 3D printer for facilitating replacement of a spray head as claimed in claim 1, wherein: the swing cooling mechanism consists of a support frame C (4), a chute B (401), a movable frame (402), a fan (403), a dustproof net rack (404), a servo motor (405) and an eccentric wheel (406);

the printing frame is characterized in that support frames C (4) are fixedly installed on two sides of the printing frame (2), sliding grooves B (401) are embedded in the upper portion of the support frames C (4), movable frames (402) are arranged on the side of the support frames C (4) in a rotating mode through rotating shafts, the side of each movable frame (402) is arranged on the inner side of each sliding groove B (401) in a sliding mode, fans (403) are installed in the movable frames (402), dustproof net racks (404) are connected to the upper portion and the lower portion of each movable frame (402) through bolts, servo motors (405) are fixedly installed above the support frames C (4), and eccentric wheels (406) are connected to the servo motors (405) through output shafts.

5. A 3D printer for facilitating replacement of a spray head as claimed in claim 2, wherein: the mounting groove A (201) is arranged in an annular shape, and the limiting frame A (204) is arranged in an arc shape.

6. A 3D printer for facilitating replacement of a spray head as claimed in claim 2, wherein: the limiting groove A (205) is arranged in an arc shape, and the limiting block B (208) is arranged in an arc shape.

7. A 3D printer for facilitating replacement of a spray head as claimed in claim 3, wherein: and the outer ring of the electric conveying roller (303) is made of butadiene rubber.