CN217047502U

CN217047502U - Synchronous belt tensioning adjusting device of 3D printer

Info

Publication number: CN217047502U
Application number: CN202220594550.0U
Authority: CN
Inventors: 洪英盛; 何桂华; 徐其川
Original assignee: Shenzhen Intelligent Technology Co ltd
Current assignee: Shenzhen Intelligent Technology Co ltd
Priority date: 2022-03-17
Filing date: 2022-03-17
Publication date: 2022-07-26
Anticipated expiration: 2032-03-17

Abstract

The utility model discloses a synchronous belt tensioning adjusting device of a 3D printer, which comprises two fixed columns, two idler wheels, a moving assembly, a strain gauge and a synchronous belt, wherein the strain gauge is arranged on the fixed columns; the moving assembly comprises a sliding wheel and a pulling assembly, the sliding wheel is arranged between two idle wheels, and the sliding wheel is in contact with the idle wheels on different side surfaces of the synchronous belt; the pulling assembly is connected with the sliding wheel and pulls the sliding wheel to move so as to adjust the tensioning degree of the synchronous belt; the strain gauge is electrically connected with the pulling assembly. Through the mode that pulling subassembly drive movable pulley removed, adjust the length of hold-in range between two idler, reach the function of adjusting hold-in range tensioning degree, the real-time tensioning degree of this method through the foil gage detection hold-in range to tensioning degree through the mode automatically regulated hold-in range of translation, can realize accurate regulation and automatically regulated to hold-in range tensioning degree.

Description

Synchronous belt tensioning adjusting device of 3D printer

Technical Field

The utility model relates to a 3D printing apparatus field especially relates to a hold-in range tensioning adjusting device of 3D printer.

Background

3D Printing full name (3 Dimensional Printing), namely three-Dimensional Printing, is a technology for manufacturing and molding by software control and layering based on a computer three-Dimensional model, and is one additive manufacturing technology. 3D printing technology is typically implemented using digital technology printers. The application object of the 3D printer can be in any industry, and has wide application in medical treatment, construction, automobiles, aerospace and education.

The elasticity condition of hold-in range has important influence to 3D printing quality in the 3D printer. If the synchronous belt is too loose, the surface of the printed product has product lines or product deformation; the synchronous belt is too tight, so that a load is generated on a motor shaft, the motor shaft is eccentric, and the quality of a printed product is finally influenced.

The first method is to tension the synchronous belt manually and then lock the synchronous belt fixing device by using a screw; the second way is to use a timing belt tensioner, with a nut screwed by hand to adjust the timing belt tightness manually. Above two kinds of modes all rely on user's experience to judge whether the hold-in range elasticity is suitable, have certain degree of difficulty to the beginner, and the regulation mode is intelligent inadequately.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hold-in range tensioning adjusting device of 3D printer aims at solving hold-in range and judges the unable problem of quantization that elasticity and manual regulation brought based on the experience in the current 3D printer.

According to the embodiment of the application, the synchronous belt tensioning adjusting device of the 3D printer comprises two fixed columns, two idler wheels, a moving assembly, strain gauges and a synchronous belt, wherein the idler wheels correspond to the fixed columns one by one, and the strain gauges are arranged on the fixed columns; the moving assembly comprises a sliding wheel and a pulling assembly, the sliding wheel is arranged between the two idle wheels, and the sliding wheel is in contact with the idle wheels on different side surfaces of the synchronous belt; the pulling assembly is connected with the sliding wheel and pulls the sliding wheel to move so as to adjust the tensioning degree of the synchronous belt; the strain gauge is electrically connected with the pulling assembly.

Preferably, the pulling assembly comprises a rotating gear, a driven gear, a screw rod, a fixed plate and a sliding block, the rotating gear is meshed with the driven gear, and the screw rod sequentially penetrates through the driven gear, the fixed plate and the sliding block; the sliding wheel is arranged on the sliding block and is rotationally connected with the sliding block; a spring is arranged between the fixed plate and the sliding block and sleeved on the outer peripheral side of the area of the screw rod between the fixed plate and the sliding block; the screw rod with driven gear threaded connection, the screw rod with the sliding block fixed connection.

Preferably, a microswitch is positioned on the side surface of the fixing plate, a trigger pressing piece extends from the position, corresponding to the microswitch, of the sliding block, and when the sliding block moves close to the fixing plate by a preset distance, the trigger pressing piece is in contact with the microswitch.

Preferably, the pulling assembly further comprises a base, the fixed plate is connected with the base or integrally formed with the base, a sliding groove is formed in the position, corresponding to the sliding block, of the base, and the sliding block moves on the sliding groove.

Preferably, the moving direction of the sliding wheel pulled by the pulling assembly is different from the moving direction of the synchronous belt.

Preferably, the pulling assembly further comprises a motor and a controller, the motor drives the rotating gear, and the controller is electrically connected with the strain gauge and the motor.

Preferably, the timing belt is in contact with the sliding wheel on a side close to the driven gear, and the timing belt is in contact with the idle wheel on a side far from the driven gear.

Compared with the prior art, the utility model provides a pair of hold-in range tensioning adjusting device of 3D printer has following beneficial effect:

the sliding wheel is located between the two idler wheels through the arrangement, the sliding wheel is in contact with the idler wheels on different side faces of the synchronous belt, the length of the synchronous belt between the two idler wheels is adjusted through a mode that the sliding wheel is driven by the pulling assembly to move, the function of adjusting the tensioning degree of the synchronous belt is achieved, the method detects the real-time tensioning degree of the synchronous belt through the strain gauge, the tensioning degree of the synchronous belt is automatically adjusted through a translation mode, and accurate adjustment and automatic adjustment of the tensioning degree of the synchronous belt can be achieved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced 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 any creative effort.

Fig. 1 is a schematic structural diagram of a synchronous belt tension adjusting device of a 3D printer according to a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of another angle of the synchronous belt tensioning adjusting device of the 3D printer according to the first embodiment of the present invention.

Fig. 3 is a schematic plan view of an angle viewed from above in a synchronous belt tensioning adjustment device of a 3D printer according to a first embodiment of the present invention.

Description of reference numerals:

1. fixing the column;

2. an idler pulley;

3. a moving assembly; 31. a sliding wheel; 32. a pulling assembly; 321. a rotating gear; 322. a driven gear; 323. a screw; 324. a fixing plate; 325. a slider; 326. a base;

4. a strain gauge; 5. a synchronous belt;

100. a spring; 200. a microswitch; 300. triggering the tabletting; 400. an electric motor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, of the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be further understood that the term "and/or" as used in the specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

Please refer to fig. 1, fig. 2 and fig. 3, a first embodiment of the present invention discloses a synchronous belt tensioning adjustment device for a 3D printer, which includes two fixed columns 1, two idler wheels 2, a moving assembly 3, strain gauges 4 and a synchronous belt 5, wherein the idler wheels 2 correspond to the fixed columns 1 one by one, and the strain gauges 4 are disposed on the fixed columns 1.

The moving assembly 3 includes a sliding wheel 31 and a pulling assembly 32, the sliding wheel 31 is disposed between the two idle wheels 2, and the sliding wheel 31 contacts the idle wheels 2 at different sides of the synchronous belt 5.

Pulling assembly 32 with the movable pulley 31 is connected, pulling assembly 32 pulls movable pulley 31 removes in order to adjust hold-in range 5 'S tensioning degree, hold-in range 5 is "S" type around establishing between idler 2 and movable pulley 31, just the surface of movable pulley 31 and idler 2 is smooth, does not influence hold-in range 5' S removal.

The idle wheel 2 is rotatably connected with the fixed column 1, when the synchronous belt 5 is tensioned under the action of the sliding wheel 31, the idle wheel 2 is stressed, the stressed idle wheel 2 enables the fixed column 1 to slightly deform, the deformation can be detected based on the strain gauge 4, the strain gauge 4 is electrically connected with the pulling assembly 32, the detection data detected by the strain gauge 4 is sent to the pulling assembly 32, and the pulling assembly 32 automatically controls the sliding direction and distance of the sliding wheel 31 based on a preset reference value. For example, in the present embodiment, the strain gauge is a common foil strain gauge, and when a conductor or a semiconductor material of the strain gauge is mechanically deformed under an external force, a resistance value of the strain gauge is correspondingly changed, in the present embodiment, a plurality of types of foil strain gauges, such as BX120-3AA, BE120-3AA, BF350-3AA, are adopted, that is, the strain condition of the current synchronous belt 5 can BE obtained by detecting the stress condition of the fixed column 1 through the strain gauge 4.

It can be understood that the direction of the sliding wheel 31 pulled by the pulling assembly 32 is different from the moving direction of the synchronous belt 5, specifically, the pulling assembly 32 drives the sliding wheel 31 to move in the same plane and perpendicular to the moving direction of the synchronous belt 5. For example, as shown in fig. 3, the direction a is the moving direction of the timing belt 5, and the direction b is the moving direction of the sliding wheel 31, since the sliding wheel 31 is disposed between the two idle wheels 2, and the side surfaces of the sliding wheel 31 and the idle wheels 2 contacting the timing belt 5 are different, the sliding wheel 31 can adjust the length of the area between the two idle wheels 2 of the timing belt 5 when moving, and thus adjust the tension of the timing belt 5.

It is understood that the pulling assembly 32 may be provided with a pushing or pulling structure based on an air cylinder, a screw transmission, etc. to directly pull the sliding wheel 31 to move in the above-mentioned direction, for example, the air cylinder is provided to be connected with the sliding wheel 31, the sliding wheel 31 is driven to slide by the expansion and contraction of the air cylinder, or a mechanical arm, a transmission shaft, etc. may also be provided to directly drive the sliding wheel 31 to slide along a predetermined direction.

With continuing reference to fig. 1, fig. 2 and fig. 3, in the present embodiment, the pulling assembly 32 includes a rotating gear 321, a driven gear 322, a screw 323, a fixing plate 324 and a sliding block 325, the rotating gear 321 is engaged with the driven gear 322, and the screw 323 sequentially passes through the driven gear 322, the fixing plate 324 and the sliding block 325.

The sliding wheel 31 is disposed on the sliding block 325, and the sliding wheel 31 is rotationally connected with the sliding block 325, that is, the sliding wheel 31 slides under the driving of the sliding block 325, and meanwhile, the sliding wheel 31 rotates on the sliding block 325 under the pulling of the synchronous belt 5.

A spring 100 is disposed between the fixed plate 324 and the sliding block 325, the spring 100 is sleeved on the outer periphery of the region of the screw 323, and the fixed plate 324 and the sliding block 325 are located at two ends of the spring 100 to press the spring 100. The screw 323 is in threaded connection with the driven gear 322, and the screw 323 is fixedly connected with the sliding block 325.

When the spring is used, the rotating gear 321 drives the driven gear 322 to rotate, the screw 323 is fixed by the sliding block 325, so that the screw 323 pulls the sliding block 325 to move under the transmission of the threads, and meanwhile, the fixed plate 324 and the sliding block 325 press two ends of the spring 100, so that the driven gear 322 keeps a relative position and contacts with the fixed plate 324, namely, the driven gear 322 does not displace when rotating.

With continued reference to fig. 1, fig. 2 and fig. 3, the pulling assembly 32 further includes a base 326, the fixing plate 324 is connected to or integrally formed with the base 326, a sliding slot is disposed on the base 326 corresponding to the sliding block 325, and the sliding block 325 moves on the sliding slot.

Optionally, as an embodiment, the sliding slot on the base 326 is provided with a stopper at an end away from the driven gear 322 to prevent the sliding block 325 from sliding out of the sliding slot.

Optionally, with continuing reference to fig. 1 and fig. 2, as another embodiment, a micro switch 200 is positioned on a side surface of the fixed plate 324, a trigger pressing piece 300 is extended from the sliding block 325 at a position corresponding to the micro switch 200, and when the sliding block 325 moves to a predetermined distance close to the fixed plate 324, the trigger pressing piece 300 contacts with the micro switch 200. The preset distance is set to a distance corresponding to the maximum pressure applied to the spring 100.

It will be appreciated that the microswitch 200 is a common microswitch, such as: d2FC-F-7N/D2FC-FL-NH or D2FC-F-K, the micro-switch 200 generates an electrical signal when contacted by the trigger pad 300 to notify the user that the maximum distance of movement of the slider 325 has been reached.

Optionally, as an embodiment, the pulling assembly 32 further includes a motor 400 and a controller, the motor 400 drives the rotating gear 321 to rotate, the controller is electrically connected to the strain gauge 4 and the motor 400, the controller is configured to receive detection data of the strain gauge 4, compare the detection data with preset data, and drive the rotating gear 321 to rotate by the automatic control motor, so as to achieve a real-time adjusting function of automatically controlling the tensioning degree of the synchronous belt 5. The controller may be configured as a master control board.

For example, in this embodiment, when the synchronous belt 5 is released or not installed, the controller detects that the tension value of the synchronous belt 5 is smaller than the reference value, and drives the sliding wheel 31 to tighten the synchronous belt 5, but since the synchronous belt 5 is released or not installed, the synchronous belt 5 cannot be tightened, and when the pressing piece 300 on the sliding block 325 is triggered to contact the microswitch 200, an alarm is triggered, which prompts to check whether the synchronous belt 5 is released or not installed.

It is understood that, in the present embodiment, the timing belt 5 is in contact with the sliding wheel 31 on the side close to the driven gear 322, and the timing belt 5 is in contact with the idle gear 2 on the side far from the driven gear 322. Or in some other embodiments, the above-mentioned contact manner may be reversed, and is not described herein again.

It can be understood that the device provided by the utility model is used for detecting the check-out time of 5 tensioning degrees of hold-in range for the 3D printer begins before printing, at printing the in-process, the function is in the suppression state to guarantee that the printing process is not influenced.

lie in between two idler through setting up the movable pulley, and movable pulley and idler contact in the different sides of hold-in range to through the mode that pulling subassembly drive movable pulley removed, adjust the length of hold-in range between two idler, reach the function of adjusting hold-in range tensioning degree, the real-time tensioning degree of this method through the foil gage detection hold-in range, and the tensioning degree through the mode automatically regulated hold-in range of translation, can realize accurate regulation and the automatically regulated to hold-in range tensioning degree.

The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of various equivalent modifications or substitutions within the technical scope of the present invention, and these modifications or substitutions should be covered within the scope of the present invention.

Claims

1. The synchronous belt tensioning adjusting device of the 3D printer is characterized by comprising two fixed columns, two idler wheels, a moving assembly, strain gauges and a synchronous belt, wherein the idler wheels correspond to the fixed columns one by one, and the strain gauges are arranged on the fixed columns;

the moving assembly comprises a sliding wheel and a pulling assembly, the sliding wheel is arranged between the two idle wheels, and the sliding wheel is in contact with the idle wheels on different side surfaces of the synchronous belt;

the pulling assembly is connected with the sliding wheel and pulls the sliding wheel to move so as to adjust the tensioning degree of the synchronous belt;

the strain gauge is electrically connected with the pulling assembly.

2. The synchronous belt tension adjusting device of the 3D printer according to claim 1, characterized in that: the pulling assembly comprises a rotating gear, a driven gear, a screw rod, a fixing plate and a sliding block, the rotating gear is meshed with the driven gear, and the screw rod sequentially penetrates through the driven gear, the fixing plate and the sliding block;

the sliding wheel is arranged on the sliding block and is rotationally connected with the sliding block;

a spring is arranged between the fixed plate and the sliding block and sleeved on the outer peripheral side of the screw rod in the area between the fixed plate and the sliding block;

the screw rod with driven gear threaded connection, the screw rod with the sliding block fixed connection.

3. The synchronous belt tensioning adjusting device of the 3D printer as claimed in claim 2, wherein: the side surface of the fixed plate is provided with a microswitch, the sliding block extends to be provided with a trigger pressing sheet at the position corresponding to the microswitch, and when the sliding block moves to be close to the fixed plate for a preset distance, the trigger pressing sheet is contacted with the microswitch.

4. The synchronous belt tensioning adjusting device of the 3D printer as claimed in claim 2, wherein: the pulling assembly further comprises a base, the fixed plate is connected with the base or integrally formed, a sliding groove is formed in the position, corresponding to the sliding block, of the base, and the sliding block moves on the sliding groove.

5. The synchronous belt tension adjusting device of the 3D printer according to claim 2, characterized in that: the moving direction of the sliding wheel pulled by the pulling assembly is different from the moving direction of the synchronous belt.

6. The synchronous belt tension adjusting device of the 3D printer according to claim 2, characterized in that: the pulling assembly further comprises a motor and a controller, the motor drives the rotating gear, and the controller is electrically connected with the strain gauge and the motor.

7. The synchronous belt tension adjusting device of the 3D printer according to any one of claims 2-6, wherein: the synchronous belt is close to with the movable pulley driven gear side contact, the synchronous belt with the idler is keeping away from driven gear side contact.