Three-dimensional forming equipment

Abstract

The utility model provides three-dimensional forming equipment. The three-dimensional forming equipment comprises a synchronous belt conduction device and a to-be-driven part, wherein the synchronous belt conduction device comprises a base; the driving part is arranged on the base, and the driving part comprises a driving wheel; the transmission wheel drives the to-be-driven part to move; the rotating block is rotationally connected with the base, a tensioning wheel is arranged on the rotating block, and an adjusting hole extending in the rotating direction is formed in the rotating block; the synchronous belt sleeves and is connected to the driving wheel, the transmission wheel and the tensioning wheel; the two ends of the elastic piece are connected with the rotating block and the base respectively; and the locking piece penetrates through the adjusting hole and is connected with the base, so that the rotating block and the base are locked and fixed. Therefore, the tensioning force of the tensioning wheel on the synchronous belt is related to the elastic deformation of the elastic piece and is not influenced by personal factors of a user, good printing quality can be ensured, the adjusting freedom degree is large, and the service life of the synchronous belt can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a three-dimensional forming device. Background Art

[0002] In a three-dimensional forming device, such as an FDM (Fused Deposition Modeling) printer, a guide frame drives a print head to descend to a preset position, and a nozzle of the print head selectively sprays a material onto a printing platform in a scanning manner according to the cross-sectional shape of a product. After the material cools, the first layer of the printed product is formed. Then the guide frame drives the print head to rise by one layer, and the second layer is printed on the basis of the first layer, and three-dimensional printing is realized by layer-by-layer accumulation.

[0003] In current FDM printers, the printing platform usually moves vertically under the action of a lead screw and a driving wheel on a belt. For the tensioning of the belt, usually, a user needs to tighten the driving wheel by hand-tightening a screw and synchronously tighten the belt, so that the tension of the belt varies from person to person. However, if the tension is too large, the belt will be tightened too much, which easily causes the motor to lose steps and result in printing defects, such as vertical stripes and layer lines on the printed product. If the tension is too small, the belt will be loose and prone to belt slipping, resulting in problems such as printing action delay, printing layer misalignment, and wavy lines on the printed product. Summary of the Utility Model

[0004] In view of this, the utility model provides a three-dimensional forming device, such that the tension of the tensioning wheel on the synchronous belt is related to the elastic deformation of the elastic member and is not affected by personal factors of the user. It can ensure the stability and constancy of the tension provided by the tensioning wheel to the synchronous belt, keep the tension of the synchronous belt within a proper range, and has a large adjustment freedom, which is beneficial to extending the service life of the synchronous belt.

[0005] An embodiment of the utility model provides a three-dimensional forming device, which includes a synchronous belt transmission device and a driven member to be driven. The driven member is driven by the synchronous belt transmission device. The synchronous belt transmission device includes: a base; a driving part, which is arranged on the base and includes a driving wheel; a transmission wheel, which drives the driven member to move; a rotating block, the first end of which is rotatably connected to the first fulcrum of the base. A tensioning wheel is arranged on the rotating block, and an adjustment hole extending along the rotation direction is formed in the rotating block; a synchronous belt, which is sleeved and connected to the driving wheel, the transmission wheel and the tensioning wheel; an elastic member, the two ends of which are respectively connected to the second end of the rotating block and the second fulcrum of the base. The first fulcrum and the second fulcrum are the same or different, and the elastic member is in an energy storage state; a locking member, which passes through the adjustment hole and is connected to the base to lock and fix the rotating block and the base.

[0006] Furthermore, a connection hole for connecting with the locking member is provided on the base. A guiding hole parallel to the adjusting hole is also formed on the base. A guiding portion is provided on the rotating block. The guiding portion is received in the guiding hole and can move along the guiding hole so that the connection hole is located within the movement track of the adjusting hole.

[0007] Furthermore, the connection point between the elastic member and the rotating block and the connection point between the elastic member and the base are in the same plane parallel to the horizontal plane; and / or the connection point between the rotating block and the elastic member and the connection point between the rotating block and the base are in the same plane parallel to the horizontal plane.

[0008] Furthermore, the rotating block is further provided with a rotating end and a connecting end. The rotating end is rotatably connected to the first fulcrum of the base through a rotating shaft. The connecting end is connected to or abuts against the elastic member; wherein, the rotating shaft is parallel to the rotating shaft of the tension pulley.

[0009] Furthermore, the connecting end is located on the side of the rotating block; and / or the adjusting hole is located between the rotating end and the tension pulley.

[0010] Furthermore, the elastic member is a tension spring. The tension spring is in a stretched state. The first end of the tension spring is relatively fixed to the base. The second end of the tension spring is connected to the connecting end. The connecting end is arranged away from the rotating end; or the elastic member is a spring. The spring is in a compressed state. The first end of the spring is relatively fixed to the base. The second end of the spring is connected to the connecting end. The connecting end is arranged away from the rotating end; or the elastic member is a spring plate. The spring plate is in a compressed state. The first end of the spring plate is relatively fixed to the base. The second end of the spring plate is connected to the connecting end. The connecting end is arranged away from the rotating end; or the elastic member is an elastic glue. The elastic glue is in a compressed state. The first end of the elastic glue is relatively fixed to the base. The second end of the elastic glue is connected to the connecting end. The connecting end is arranged away from the rotating end.

[0011] Furthermore, the elastic member is a torsion spring. The torsion spring is in a torsional state. The torsion spring is arranged at the rotating shaft. The first torsion arm of the torsion spring is relatively fixed to the base. The second torsion arm of the torsion spring is connected to or abuts against the connecting end; or the elastic member is a torsion spring. The torsion spring is in a torsional state. The torsion spring is rotatably arranged on the fixed column of the base. The first torsion arm of the torsion spring is relatively fixed to the base. The second torsion arm of the torsion spring is connected to or abuts against the connecting end.

[0012] Furthermore, the rotating block and the elastic member are located inside the area enclosed by the sequential connection of the driving wheel and the transmission wheel.

[0013] Furthermore, the rotating shaft of the rotating block is located inside the synchronous belt.

[0014] Furthermore, the range of the central angle of the adjusting hole is less than or equal to 80°.

[0015] Furthermore, the three-dimensional forming device further includes: a lead screw, which is connected to the driven member through a threaded structure; a fixed seat, on which a threaded structure is installed or provided, and the fixed seat is connected to the driven member; a guide rod arranged in parallel with the lead screw, the guide rod is connected to the base, and the fixed seat passes through the guide rod and can slide along the guide rod.

[0016] Furthermore, the driven member includes a printing platform or a print head.

[0017] The three-dimensional forming device provided by the embodiment of the present invention includes a synchronous belt transmission device and a driven member. The driven member is driven by the synchronous belt transmission device. The synchronous belt transmission device includes a base, a driving part, a transmission wheel, a rotating block, a synchronous belt, an elastic member and a locking member. The driving part includes a driving wheel that can rotate relative to the base. The transmission wheel drives the driven member to move. The rotating block is rotatably connected to the base and is provided with a tensioning wheel. The synchronous belt is sleeved on the driving wheel, the transmission wheel and the tensioning wheel. The locking member fixes the rotating block on the base through the adjustment hole on the rotating block. Thus, when the driving wheel of the driving part rotates, through the synchronous belt, the transmission wheel and the tensioning wheel can be driven to rotate, and the driven member can be moved to a suitable position. When the synchronous belt needs to be tensioned, the locking member is adjusted to make the rotating block rotatable relative to the base. The elastic member provides an elastic force to the rotating block, so that the rotating block drives the tensioning wheel to move. Furthermore, the tensioning wheel can apply a tensioning force to the synchronous belt for synchronous belt tensioning operation. Then, the locking member is adjusted to lock and fix the rotating block relative to the base, so that the synchronous belt can be kept in a suitable tension state to complete the tensioning operation.

[0018] During the synchronous belt tensioning operation, since the elastic member applies an elastic force to the rotating block through elastic deformation, the tensioning force of the tensioning wheel on the synchronous belt located on the rotating block is related to the elastic deformation of the elastic member and is not affected by personal factors of the user. Compared with the related technology in which the user tightens the transmission wheel by hand to tighten the synchronous belt and the tensioning force of the synchronous belt varies due to different operations of different people, in this embodiment, the restoring force brought by the energy storage state of the elastic member is linked to the "rotation of the rotating block around the first fulcrum" and the "adjustment hole extending along the rotation direction", which brings a certain stability, can ensure the stability and constancy of the tensioning force provided by the tensioning wheel to the synchronous belt, and keeps the tension degree of the synchronous belt within a suitable range. At the same time, this setting makes the movement range of the tensioning wheel relatively large as a whole, can meet the tensioning operation of the closed-loop synchronous belt with a large tolerance, and has a large adjustment freedom and good adjustment stability.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the description. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the specific embodiments of the present application are specifically given below. Brief Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered as a limitation to the present invention. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0021] Figure 1 FIG. shows a perspective three-dimensional structure diagram of a part of the three-dimensional forming device of the present invention;

[0022] Figure 2 FIG. shows a perspective three-dimensional structure diagram of another part of the three-dimensional forming device of the present invention;

[0023] Figure 3 FIG. shows a perspective three-dimensional structure diagram of a part of the belt tensioning device of the present invention;

[0024] Figure 4 FIG. shows a perspective structure diagram of the rotating block of the belt tensioning device of the present invention in the first extreme position;

[0025] Figure 5 FIG. shows a perspective structure diagram of the rotating block of the belt tensioning device of the present invention in the second extreme position;

[0026] Figure 6 FIG. shows Figure 4 A partial enlarged view of the position A of the illustrated embodiment.

[0027] Among them, Figures 1 to 6 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0028] 100 synchronous belt transmission device, 110 base, 111 guide hole, 112 connecting lug, 120 driving part, 121 driving wheel, 130 driving wheel, 140 rotating block, 141 tensioning wheel, 142 adjusting hole, 1421 first end, 1422 second end, 143 rotating end, 144 connecting end, 150 synchronous belt, 160 elastic member, 170 locking member, 200 three-dimensional forming device, 210 lead screw, 220 printing platform, 230 fixed seat, 240 guide rod. Detailed Description of the Preferred Embodiments

[0029] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific embodiments. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] Refer to the following Figures 1 to 6 to describe a three-dimensional forming device 200 provided according to some embodiments of the present utility model. The three-dimensional forming device 200 may be a printer of the fused deposition type.

[0031] As shown in Figure 1 、 Figure 2 and Figure 3 An embodiment of the present utility model provides a three-dimensional forming device 200, which includes a synchronous belt transmission device 100 and a driven member. The driven member is driven by the synchronous belt transmission device 100. The synchronous belt transmission device 100 includes: a base 110; a driving part 120, the driving part 120 is arranged on the base 110, and the driving part 120 includes a driving wheel 121; a transmission wheel 130, the transmission wheel 130 drives the driven member to move; a rotating block 140, the first end of the rotating block 140 is rotatably connected to the first fulcrum of the base 110, a tensioning wheel 141 is arranged on the rotating block 140, and the rotating block 140 is provided with an adjusting hole 142 extending along the rotation direction; a synchronous belt 150, the synchronous belt 150 is sleeved and connected to the driving wheel 121, the transmission wheel 130 and the tensioning wheel 141; an elastic member 160, both ends of the elastic member 160 are respectively connected to the rotating block 140 and the second fulcrum of the base 110, the first fulcrum and the second fulcrum are the same or different, and the elastic member 160 is in an energy storage state; a locking member 170, the locking member 170 passes through the adjusting hole 142 and is connected to the base 110 to lock and fix the rotating block 140 and the base 110.

[0032] Among them, the three-dimensional forming device 200 may include a synchronous belt transmission device 100 and a driven member. The driven member may be a printing platform 220, a print head, etc. The driven member is driven by the synchronous belt transmission device 100 to move. Specifically, the driven member is driven by the synchronous belt transmission device 100 to move in the vertical direction. The following takes the driven member as the printing platform as an example to illustrate the embodiments provided by the present utility model. It can be understood that when the driven member is a print head or other components, the technical solutions provided by the embodiments of the present utility model are still applicable.

[0033] Among them, the three-dimensional forming device 200 includes a plurality of lead screws 210 and a printing platform 220 connected to the lead screws 210 through a threaded structure. Specifically, as shown in Figure 1As shown, the lead screw 210 is arranged in the Z-axis direction, which can be understood as the vertical direction. Since the printing platform 220 is connected to the lead screw 210 through a threaded structure, when the lead screw 210 and the threaded structure rotate relative to each other, the printing platform 220 can move relative to the lead screw 210 in the Z-axis direction, and thus the printing platform 220 can move to a suitable position in the vertical direction. It can be understood that the printing platform 220 is connected to the lead screw through a threaded structure, which can be that the printing platform 220 is directly connected to the lead screw through a threaded structure, or the printing platform 220 is indirectly connected to the lead screw through the threaded structure of other components.

[0034] Among them, the number of lead screws 210 is multiple, such as the lead screws 210 can be two, three, four, or other numbers. Thus, multiple lead screws 210 can provide good and stable support for the printing platform 220, ensuring the smoothness of the movement of the printing platform 220 in the vertical direction and ensuring good printing quality.

[0035] Among them, the lead screw 210 is rotatably arranged on the base 110. For example, the bottom end of the lead screw 210 is connected to the base 110 through a rotating member. Specifically, the rotating member can be a rotating bearing or other rotating mechanisms. The setting of the rotating member enables the lead screw 210 to rotate relative to the base 110, and the lead screw 210 is relatively fixed to the base 110 in the Z-axis direction.

[0036] The synchronous belt transmission device 100 provided by the embodiment of the present invention includes a base 110, a driving part 120, a transmission wheel 130, a rotating block 140, a synchronous belt 150, an elastic member 160, and a locking member 170. Among them, the driving part 120 is arranged on the base 110 and includes a driving wheel 121 that can rotate relative to the base 110. The transmission wheel 130 is sleeved on the lead screw 210. The rotating block 140 is rotatably connected to the first fulcrum of the base 110 and is provided with a tensioning wheel 141. The synchronous belt 150 is sleeved and connected to the driving wheel 121, the transmission wheel 130, and the tensioning wheel 141. The locking member 170 fixes the rotating block 140 on the base 110 through the adjusting hole 142 on the rotating block 140. Thus, when the driving wheel 121 of the driving part 120 rotates, through the synchronous belt 150, it can drive the transmission wheel 130 and the tensioning wheel 141 to rotate. Since the transmission wheel 130 is sleeved on the lead screw 210, it can drive the lead screw 210 to rotate. When the lead screw 210 rotates relative to the threaded structure, the printing platform 220 can move relative to the lead screw 210 to a suitable position in the Z-axis direction.

[0037] Since the two ends of the elastic member 160 of the synchronous belt transmission device 100 are respectively connected to the second fulcrum of the rotating block 140 and the base 110, when the synchronous belt 150 needs to be tensioned, the locking member 170 is adjusted to make the rotating block 140 rotatable relative to the base 110, and the elastic member 160 in the energy storage state releases energy, and the elastic member 160 is used to provide elastic force to the rotating block 140 so that the rotating block 140 drives the tensioning wheel 141 to move, and then the tensioning wheel 141 can apply tensioning force to the synchronous belt 150 to perform the synchronous belt tensioning operation, and then the locking member 170 is adjusted to lock and fix the rotating block 140 relative to the base 110, so that the synchronous belt 150 can be kept in a suitable tensioned state to complete the tensioning operation.

[0038] During the operation of tensioning the synchronous belt, the elastic member 160 in the energy storage state releases energy, and the elastic deformation of the elastic member 160 is used to apply an elastic force to the rotating block 140. Therefore, the tensioning force of the tensioning wheel 141 on the rotating block 140 on the synchronous belt 150 is related to the elastic deformation of the elastic member 160 and will not be affected by the user's personal factors. Compared with the related art in which the user manually tightens the screw to tighten the transmission wheel to achieve the belt tensioning operation, which will cause different tensioning forces of the synchronous belt due to different operations by different people, the process of applying the tensioning force to the tensioning wheel 141 by the elastic deformation of the elastic member 160 to achieve the tensioning operation of the synchronous belt in this embodiment does not require the user to rely on feeling to judge the size of the tensioning force to adjust the tightness of the synchronous belt 150, ensuring that even if different users operate The elastic member 160 provides the same elastic force to the rotating block 140, thereby ensuring the stability and constancy of the tensioning force provided by the tensioning wheel 141 to the synchronous belt 150, so that the tension of the synchronous belt 150 is maintained in an appropriate range, ensuring the movement accuracy of the printing platform 220 in the vertical direction, and avoiding the user's hand-tightening of the screws for belt tensioning, which makes the belt tensioning force larger and the belt tighter, which may easily cause the motor to lose steps and produce printing defects, vertical grain and layer patterns on the printed products, and at the same time, avoiding the user's hand-tightening of the screws for belt tensioning, which makes the belt tensioning force smaller and the belt looser, causing the belt to slip, resulting in delayed printing action, staggered printing, insufficient speed, and wavy patterns on the printed products. The printing quality is greatly improved and suitable for promotion and application.

[0039] Furthermore, in this embodiment, the elastic deformation of the elastic member 160 drives the rotation of the rotating block 140 to apply a tension force to the tension pulley 141 to achieve the tensioning operation of the synchronous belt. Since the rotation range of the rotating block 140 can be relatively large, the synchronous belt transmission device 100 has a large adjustment freedom and a wide application range. For example, for a closed-loop synchronous belt, it usually has a large tolerance. If the movement range of the tension pulley 141 is small, such as the tension pulley can only move within a small range, it cannot meet the tensioning operation of the closed-loop synchronous belt with a large tolerance. In this embodiment, since the elastic deformation of the elastic member 160 can drive the rotation of the rotating block 140 to drive the synchronous movement of the tension pulley 141, and the rotation range of the rotating block 140 can be relatively large, the movement range of the tension pulley 141 is large, which can meet the tensioning operation of the closed-loop synchronous belt with a large tolerance and has a large adjustment freedom. At the same time, in this embodiment, the elastic deformation of the elastic member 160 drives the rotation of the rotating block 140 to drive the movement of the tension pulley 141. This layout can reduce the possibility of the rotating block 140 and the tension pulley 141 jumping in the vertical direction. Therefore, it can reduce the possibility of the synchronous belt 150 jumping in the vertical direction, making the fit between the synchronous belt 150 and the transmission pulley 130 and the tension pulley 141 better during the adjustment process, and reducing the possibility of the synchronous belt 150 contacting the edge guards on both sides of the transmission pulley 130 or the tension pulley 141. Furthermore, it can avoid the possibility of the synchronous belt 150 breaking due to long-term contact with the edge guards on both sides of the transmission pulley 130 or the tension pulley 141, which is beneficial to extending the service life of the synchronous belt 150, improving the service life of the synchronous belt transmission device 100, and improving the cleanliness and reliability of the three-dimensional forming device 200.

[0040] Among them, the rotating block 140 is rotatably connected to the first fulcrum of the base 110, and the elastic member 160 is connected to the second fulcrum of the base 110. The first fulcrum and the second fulcrum can be the same or different. Thus, it can meet the requirements of different shapes of the rotating block 140, different structures of the elastic member 160, and different connection positions between the elastic member 160 and the rotating block 140.

[0041] Specifically, when the first fulcrum and the second fulcrum are the same, the elastic member 160 can be eccentrically connected to the rotating block 140. For example, the elastic member 160 can be connected to the side of the rotating block 140, etc., so that the elastic deformation of the elastic member 160 drives the smooth rotation of the rotating block 140. It can be understood that in this case, the rotation range of the rotating block 140 is small. When the first fulcrum and the second fulcrum are different, the elastic member 160 can be connected to the side, top, bottom, etc. of the rotating block 140. It can be understood that in this case, by reasonably setting the positions of the first fulcrum and the second fulcrum, the rotation range of the rotating block 140 can be relatively large, and then the synchronous belt transmission device 100 has a large adjustment degree and a wide application range.

[0042] Among them, the driving part 120 may include a motor, and the motor drives the driving wheel 121 to rotate. It can be understood that the driving part 120 can also drive the driving wheel 121 to rotate in other ways.

[0043] Among them, as Figure 3 and Figure 6 shown, the rotating block 140 is provided with an adjusting hole 142 extending along the rotation direction. For example, the adjusting hole 142 is set as an arc-shaped waist-shaped hole extending along the rotation direction of the rotating block 140 relative to the base 110. It can be understood that a connecting hole is provided on the base 110, and the connecting hole is located within the movement track range of the waist-shaped hole and is connected to the waist-shaped hole. In this way, after the elastic member 160 provides an elastic force to the rotating block 140 to rotate the rotating block 140 to a proper position so that the tensioning wheel 141 tensions the synchronous belt 150, the locking member 170 passes through the adjusting hole 142 and is connected to the connecting hole on the base 110, and then the rotating block 140 and the base 110 can be locked and fixed, so that the synchronous belt 150 remains in the tensioned state after the tensioning operation, ensuring good movement accuracy of the printing platform 220 and improving the printing quality. The setting of the waist-shaped hole enables the rotating block 140 to rotate to different positions under the action of the elastic member 160, and the locking member 170 can be smoothly connected to the connecting hole on the base 110 to lock and fix the rotating block 140 on the base 110.

[0044] Specifically, the locking member 170 can be a bolt, and the connecting hole on the base 110 can be a threaded hole. The bolt is a standard part with a low cost, and the threaded hole is convenient to process with a low processing cost, which is suitable for popularization and application. It can be understood that the locking member 170 can also be of other structures.

[0045] Furthermore, the range of the central angle of the adjusting hole 142 is matched with the tolerance range of the length of the synchronous belt 150 and the deformation ability of the elastic member 160, ensuring that the elastic member 160 drives the rotating block 140 to rotate within the range of the central angle of the adjusting hole 142. Through the tensioning force provided by the tensioning wheel 141 to the synchronous belt 150, the synchronous belt 150 can be ensured to be in a proper tension degree. Specifically, the central angle of the adjusting hole 142 can be understood as the angle formed by connecting the two endpoints of the adjusting hole 142 along the rotation direction of the rotating block 140 to the center of the circle with the axis of the rotating block 140 relative to the base 110 as the center of the circle, or it can also be understood as the rotation range of the rotating block 140.

[0046] Specifically, the adjusting hole 142 includes a first end portion 1421 and a second end portion 1422 that are oppositely arranged along the rotation direction of the rotating block 140, such as Figure 4 、 Figure 5 、 Figure 6As shown, the arrow X can be understood as the left - right direction of the three - dimensional forming device 200, and the arrow Y can be understood as the front - back direction of the three - dimensional forming device 200. The rotating block 140 rotates relative to the base 110 substantially in the left - right direction. Among them, as Figure 4 and Figure 5 shown, the first end 1421 can be located on the left side of the second end 1422. As Figure 4 and Figure 6 shown, the rotating block 140 of the synchronous belt transmission device 100 is in the first extreme position, and the first end 1421 of the adjusting hole 142 abuts against the locking member 170. That is to say, under the action of the elastic member 160, the rotating block 140 will not continue to rotate to the left, and the rotating block 140 can rotate to the right. At this time, the included angle between the connecting line of the rotation axis of the tension pulley 141 and the rotation axis of the rotating block 140 and the Figure 4 X direction shown is a°. As Figure 5 shown, the rotating block 140 of the synchronous belt transmission device 100 is in the second extreme position, and the second end 1422 of the adjusting hole 142 abuts against the locking member 170. That is to say, under the action of the elastic member 160, the rotating block 140 will not continue to rotate to the right, and the rotating block 140 can rotate to the left. At this time, the included angle between the connecting line of the rotation axis of the tension pulley 141 and the rotation axis of the rotating block 140 and the Figure 5 X direction shown is b°. Thus, the range of the central angle of the adjusting hole 142 can be b° - a°. That is to say, under the action of the elastic member 160, the rotating block 140 can rotate between the first extreme position and the second extreme position to ensure that the synchronous belt 150 can be in an appropriate tension degree.

[0047] Furthermore, by limiting the range of the central angle of the adjusting hole 142 to be less than or equal to 80°, the rotation range of the rotating block 140 can be less than or equal to 80°. That is, the rotating block 140 has a relatively large rotation range, and further, the synchronous belt transmission device 100 has a high adjustment degree, can meet the tensioning operations of various forms of synchronous belts, and has a wide application range. Specifically, the central angle of the adjusting hole 142 can be 10°, 40°, 60°, 80°, or other angles. It can be understood that the range of the adjusting hole 142 can be reasonably set according to the deformation ability of the elastic member 160, the style and tolerance range of the synchronous belt 150, the application scenario of the synchronous belt transmission device 100, etc., to ensure that the synchronous belt transmission device 100 has a good self - tensioning effect. It can be understood that in some other examples, the range of the central angle of the adjusting hole 142 can be greater than 80°.

[0048] As Figure 4 and Figure 5As shown, in some possible embodiments provided by the present utility model, a guiding hole 111 parallel to the adjusting hole 142 is formed in the base 110. That is to say, the guiding hole 111 is also an arc-shaped waist-shaped hole, and the extending direction of the guiding hole 111 is the same as the rotating direction of the rotating block 140. A guiding portion is provided on the rotating block 140, and the guiding portion is received in the guiding hole 111 and can move along the guiding hole 111. Thus, through the cooperation of the guiding portion on the rotating block 140 and the guiding hole 111 on the base 110, a good guiding effect is provided for the rotation of the rotating block 140 relative to the base 110, so as to ensure the stability and smoothness of the rotation of the rotating block 140 relative to the base 110. At the same time, the movement range of the rotating block 140 relative to the base 110 is limited to ensure that the connecting hole on the base 110 is located within the movement track of the adjusting hole 142, and to avoid the problem that the movement range of the rotating block 140 relative to the base 110 is too large, resulting in the movement track of the adjusting hole 142 exceeding the connecting hole and causing the locking member 170 to be unable to fix the rotating block 140 and the base 110. Therefore, it can be ensured that the locking member 170 can smoothly pass through the adjusting hole 142 and be connected to the connecting hole on the base 110 to lock and fix the rotating block 140 on the base 110, so as to ensure the reliability of the synchronous belt tensioning operation.

[0049] It can be understood that the cooperation between the guiding portion of the rotating block 140 and the guiding hole 111 of the base 110 can limit the movement range of the rotating block 140 relative to the base 110, that is, the rotating block 140 can move between the first limit position and the second limit position. Among them, in the first limit position, as Figure 4 shown, the connecting hole coincides with the first end portion 1421 of the guiding hole 111 in the vertical direction. In the second limit position, as Figure 5 shown, the connecting hole coincides with the second end portion 1422 of the guiding hole 111 in the vertical direction. Among them, when the locking member 170 loosens the rotating block 140 and the base 110 for the synchronous belt tensioning operation, under the action of the elastic member 160, the rotating block 140 can stop at the first limit position, the second limit position, or between the first limit position and the second limit position, so that the synchronous belt 150 is in a suitable tension state.

[0050] Furthermore, the guiding portion can be an arc-shaped convex block, and the arc-shaped convex block cooperates with the arc-shaped guiding hole 111 to improve the smoothness and stability of the rotation of the rotating block 140 relative to the base 110, and the arc-shaped convex block and the arc-shaped guiding hole 111 cooperate to have a good limiting effect. Specifically, the arc-shaped guiding hole 111 can be a through hole or a blind hole.

[0051] In some possible embodiments provided by the present utility model, the connection point of the elastic member 160 and the rotating block 140 and the connection point of the elastic member 160 and the base 110 are in the same plane parallel to the horizontal plane. This setting enables the elastic member 160 to drive the rotating block 140 to rotate during the elastic deformation from the energy storage state, which can improve the smoothness of the rotation of the rotating block 140, reduce the possibility of the rotating block 140 jumping in the vertical direction, and further reduce the possibility of the tension pulley 141 on the rotating block 140 jumping in the vertical direction, improve the smoothness of the movement of the tension pulley 141, reduce the possibility of the synchronous belt 150 jumping in the vertical direction, improve the smoothness of the movement of the synchronous belt transmission device 100, and reduce the possibility of the synchronous belt 150 touching the side edges of the transmission pulley 130 and the tension pulley 141, which is beneficial to improving the service life of the synchronous belt 1150.

[0052] It can be understood that one end of the elastic member 160 can be connected to the side wall of the rotating block 140, and fixing columns, connecting lugs, etc. can be provided on the base 110 so that the other end of the elastic member 160 is connected to the fixing column or the connecting lug to ensure that the connection point of the elastic member 160 and the rotating block 140 and the connection point of the elastic member 160 and the base 110 are in the same plane parallel to the horizontal plane.

[0053] In some possible embodiments provided by the present utility model, the connection point of the rotating block 140 and the elastic member 160 and the connection point of the rotating block 140 and the base 110 are in the same plane parallel to the horizontal plane. This setting can improve the smoothness of the rotation of the rotating block 140, reduce the possibility of the rotating block 140 jumping in the vertical direction, and further reduce the possibility of the tension pulley 141 on the rotating block 140 jumping in the vertical direction, improve the smoothness of the movement of the tension pulley 141, so as to reduce the possibility of the synchronous belt 150 jumping in the vertical direction, improve the smoothness of the movement of the synchronous belt transmission device 100, and reduce the possibility of the synchronous belt 150 touching the side edges of the transmission pulley 130 and the tension pulley 141, which is beneficial to improving the service life of the synchronous belt 1150.

[0054] It can be understood that one end of the elastic member 160 can be connected to the side wall of the rotating block 140, and a rotating shaft can be provided on the base 110, and the rotating block 140 is rotatably connected to the rotating shaft to ensure that the connection point of the rotating block 140 and the elastic member 160 and the connection point of the rotating block 140 and the base 110 are in the same plane parallel to the horizontal plane.

[0055] In some possible embodiments provided by the present utility model, the connection point of the elastic member 160 and the rotating block 140 and the connection point of the elastic member 160 and the base 110 are in the same plane parallel to the horizontal plane. At the same time, the connection point of the rotating block 140 and the elastic member 160 and the connection point of the rotating block 140 and the base 110 are in the same plane parallel to the horizontal plane. Such an arrangement can further reduce the possibility of the synchronous belt 150 jumping in the vertical direction, improve the smoothness of the movement of the synchronous belt transmission device 100, and is beneficial to improving the service life of the synchronous belt 1150.

[0056] As Figure 3 , Figure 4 and Figure 5 shown, in some possible embodiments provided by the present utility model, the rotating block 140 is further provided with a rotating end 143 and a connecting end 144. The rotating end 143 is rotatably connected to the first fulcrum of the base 110 through a rotating shaft, so that the rotating block 140 can rotate relative to the base 110 around the rotating shaft.

[0057] The connecting end 144 is connected or abutted against the elastic member 160, so that when the locking member 170 releases the rotating block 140 relative to the base 110, the rotating block 140 can rotate relative to the base 110 when the elastic member 160 releases elastic potential energy. Since the rotating shaft of the rotating block 140 is parallel to the rotating shaft of the tensioning wheel 141, thus, the rotation of the rotating block 140 relative to the base 110 can drive the tensioning wheel 141 to rotate synchronously relative to the base 110, so that the tensioning wheel 141 is stably connected to the synchronous belt 150, and the tensioning wheel 141 provides a tensioning force to the synchronous belt 150 to realize the tensioning operation of the synchronous belt 150.

[0058] Specifically, a connecting shaft parallel to the rotating shaft can be provided on the rotating block 140, and the tensioning wheel 141 is rotatably connected to the rotating block 140 through the connecting shaft.

[0059] Among them, the rotating shaft and the tensioning wheel 141 can be arranged at opposite ends of the rotating block 140, or the rotating shaft and the tensioning wheel 141 can be arranged at appropriate positions of the rotating block 140.

[0060] As Figure 3As shown, in the above embodiment, the connection end 144 is located on the side of the rotating block 140. Since the elastic member 160 is located on one side of the rotating block 140, by arranging the connection end 144 that connects or abuts the rotating block 140 and the elastic member 160 on the side of the rotating block 140 close to the elastic member 160, the elastic deformation of the elastic member 160 can push or pull the rotating block 140 to rotate relative to the base 110 from the side of the rotating block 140. Compared with the connection end 144 being located on the top of the rotating block 140, setting the connection end 144 on the side of the rotating block 140 can minimize the magnitude of the component force of the elastic force in the vertical direction. Thus, the utilization rate of the elastic force of the elastic deformation of the elastic member 160 can be improved, the loss of the elastic force can be reduced, and at the same time, it is beneficial to reduce the possibility of the rotating block 140 shaking and jumping in the vertical direction, and improve the reliability and stability of the rotation of the rotating part relative to the base 110. Therefore, the possibility of the tension pulley 141 jumping can be reduced, which is beneficial to providing a stable tension force.

[0061] As Figure 3 shown, in the above embodiment, the adjustment hole 142 is located between the rotating end 143 and the tension pulley 141. This setting can meet the design requirements of the rotating block 140 with a compact structure and a small volume compared with the adjustment hole 142 being located on the side of the tension pulley 141 away from the rotating end 143. Furthermore, the material used for the rotating block 140 can be reduced, and the manufacturing cost can be saved.

[0062] As Figure 3 、 Figure 4 、 Figure 5 shown, in some possible embodiments provided by the present utility model, the elastic member 160 is a tension spring. The tension spring is in a stretched state. The first end of the tension spring is relatively fixed to the base 110, and the second end of the tension spring is connected to the connection end 144. Thus, the tension spring can stably provide an elastic force to the rotating block 140, so that the tension pulley 141 provides a tension force to the synchronous belt 150 to tension the synchronous belt 150.

[0063] Among them, the first end of the tension spring is relatively fixed to the second fulcrum of the base 110. A connecting lug 112 can be provided at the second fulcrum of the base 110. The first end of the tension spring is reliably connected to the base 110 through the connecting lug 112. For example, the first end of the tension spring is hooked on the connecting lug 112.

[0064] Among them, the connection end 144 on the rotating block 140 can be a connection hook, and the second end of the tension spring is connected to the connection hook to ensure the reliability of the connection between the tension spring and the rotating block 140.

[0065] Among them, the connection end 144 is arranged away from the rotation end 143. For example, the connection end 144 can be arranged close to the tension pulley 141. This arrangement, compared with the case where the connection end 144 is arranged close to the rotation end 143, enables the elastic member 160 to provide a smaller elastic force to rotate the rotating member by the same angle. Furthermore, the requirements for the elastic member 160 can be reduced, which is suitable for popularization and application.

[0066] In some possible embodiments provided by the present utility model, the elastic member 160 is a spring. The spring is in a compressed state. The first end of the spring is relatively fixed to the base 110, and the second end of the spring is connected to the connection end 144. Thus, the spring can stably provide an elastic force to the rotating block 140, so that the tension pulley 141 provides a tension force to the synchronous belt 150 to tension the synchronous belt 150.

[0067] Among them, the first end of the spring is relatively fixed to the second fulcrum of the base 110. A connecting lug 112 can be arranged at the second fulcrum of the base 110. The first end of the spring is reliably connected to the base 110 through the connecting lug 112. For example, the first end of the spring is hooked on the connecting lug 112.

[0068] Among them, the connection end 144 on the rotating block 140 can be a connection hook, and the second end of the spring is connected to the connection hook to ensure the reliability of the connection between the spring and the rotating block 140.

[0069] Among them, the connection end 144 is arranged away from the rotation end 143. For example, the connection end 144 can be arranged close to the tension pulley 141. This arrangement, compared with the case where the connection end 144 is arranged close to the rotation end 143, enables the elastic member 160 to provide a smaller elastic force to rotate the rotating member by the same angle. Furthermore, the requirements for the elastic member 160 can be reduced, which is suitable for popularization and application.

[0070] In some possible embodiments provided by the present utility model, the elastic member 160 is a spring plate. The spring plate is in a compressed state. The first end of the spring plate is relatively fixed to the base 110, and the second end of the spring plate is connected to the connection end 144. Thus, the spring plate can stably provide an elastic force to the rotating block 140, so that the tension pulley 141 provides a tension force to the synchronous belt 150 to tension the synchronous belt 150.

[0071] Among them, the first end of the spring plate is relatively fixed to the second fulcrum of the base 110. A slot can be arranged at the second support of the base 110. The first end of the spring plate is reliably connected to the base 110 through the slot.

[0072] Among them, the connection end 144 on the rotating block 140 can be a slot, and the second end of the elastic piece is connected to the slot on the rotating block 140 to ensure the reliability of the connection between the elastic piece and the rotating block 140. Alternatively, the connection end 144 on the rotating block 140 can be a limiting surface, such as a limiting plane, and the second end of the elastic piece abuts against the limiting plane to ensure the reliability of the abutment between the mystery and the rotating block 140.

[0073] Among them, the connection end 144 is arranged away from the rotating end 143. For example, the connection end 144 can be arranged close to the tension pulley 141. This setting, compared with the setting where the connection end 144 is close to the rotating end 143, enables the elastic member 160 to provide a smaller elastic force to rotate the rotating member by the same angle. Furthermore, the requirements for the elastic member 160 can be reduced, which is suitable for popularization and application.

[0074] In some possible embodiments provided by the present utility model, the elastic member 160 is a elastic glue, and the elastic glue is in a compressed state. The first end of the elastic glue is relatively fixed to the base 110, and the second end of the elastic glue is connected to the connection end 144. Thus, the elastic glue can stably provide an elastic force to the rotating block 140, so that the tension pulley 141 provides a tension force to the synchronous belt 150 to tension the synchronous belt 150.

[0075] Among them, the first end of the elastic glue is relatively fixed to the second fulcrum of the base 110, and the second end of the elastic glue is connected to the second end of the rotating block 140. For example, a fixing block can be arranged on the base 110, and the two ends of the elastic glue are respectively connected or abutted to the fixing block and the second end of the rotating block 140. Alternatively, a slot can be arranged on the fixing block, and the connection end 144 of the rotating block 140 can also be a slot. The elastic glue is a sheet-like structure, and the first end of the elastic glue is connected to the slot on the fixing block of the base 110 to ensure the reliability of the connection between the elastic glue and the base 110. The second end of the elastic glue is connected to the slot on the rotating block 140 to ensure the reliability of the connection between the elastic glue and the rotating block 140. Specifically, the elastic glue can include urethane rubber, spring glue, polyurethane rod, etc.

[0076] Among them, the connection end 144 is arranged away from the rotating end 143. For example, the connection end 144 can be arranged close to the tension pulley 141. This setting, compared with the setting where the connection end 144 is close to the rotating end 143, enables the elastic member 160 to provide a smaller elastic force to rotate the rotating member by the same angle. Furthermore, the requirements for the elastic member 160 can be reduced, which is suitable for popularization and application.

[0077] In some possible embodiments provided by the present utility model, the elastic member 160 is a torsion spring, and the torsion spring is in a torsional state. The torsion spring can stably provide an elastic force to the rotating block 140, so that the tension pulley 141 provides a tension force to the synchronous belt 150 to tension the synchronous belt 150.

[0078] In one example, a torsion spring is disposed at the rotating shaft. The first torsion arm of the torsion spring is relatively fixed to the base 110, and the second torsion arm of the torsion spring is connected to or abuts against the connecting end 144. For example, a connecting lug 112 can be provided on the base 110, and the first torsion arm of the button spring abuts against the connecting lug 112. Alternatively, a slot is provided on the connecting lug 112, and the first torsion arm of the torsion spring is inserted into the slot of the connecting lug 112 to ensure reliable abutment or connection between the first torsion arm of the torsion spring and the base 110. Wherein, the connecting end 144 on the rotating block 140 can be a slot, and the second torsion arm of the torsion spring is inserted into the slot of the connecting block to achieve reliable connection between the second torsion arm and the rotating block 140. Or, the connecting end 144 on the rotating block 140 is the side wall of the rotating block 140, and the second button arm of the torsion spring abuts against the side wall of the rotating block 140 to achieve reliable abutment between the second torsion arm and the rotating block 140.

[0079] In another example, the torsion spring is rotatably disposed on the fixed post of the base 110. The first torsion arm of the torsion spring is relatively fixed to the base 110, and the second torsion arm of the torsion spring is connected to or abuts against the connecting end 144. For example, a fixed post is provided on the base 110, the torsion spring sleeve is sleeved on the fixed post of the base 110, and a limiting post is further provided on the base 110. The first torsion arm of the torsion spring abuts against the limiting post. Alternatively, a slot is provided on the limiting post, and the first torsion arm of the torsion spring is inserted into the slot on the limiting post to achieve reliable connection between the first torsion arm and the base 110. Wherein, the connecting end 144 on the rotating block 140 can be a slot, and the second torsion arm of the torsion spring is inserted into the slot of the connecting block to achieve reliable connection between the second torsion arm and the rotating block 140. Or, the connecting end 144 on the rotating block 140 is the side wall of the rotating block 140, and the second button arm of the torsion spring abuts against the side wall of the rotating block 140 to achieve reliable abutment between the second torsion arm and the rotating block 140.

[0080] As Figure 3 , Figure 4 and Figure 5 shown, in some possible embodiments provided by the present utility model, the rotating block 140 and the elastic member 160 are located inside the area enclosed by the sequential connection of the driving wheel 121 and the transmission wheel 130. This kind of setting enables the size of the base 110 to meet the installation requirements of the lead screw 210 connected to the transmission wheel 130, and the volume of the base 110 can be minimized as much as possible, reducing the manufacturing cost of the base 110. If the rotating block and the elastic member are disposed outside the area enclosed by the sequential connection of the driving wheel and the transmission wheel, in this case, the size of the base not only needs to meet the installation requirements of the lead screw connected to the transmission wheel, but also needs to meet the installation requirements of the rotating block and the elastic member. Therefore, the size of the base is larger, more materials are used, and the cost is higher.

[0081] As Figure 3 , Figure 4 and Figure 5As shown, in some possible embodiments provided by the present utility model, the rotating shaft of the rotating block 140 is located inside the synchronous belt 150. This arrangement, compared with the rotating shaft of the rotating block 140 being located outside the synchronous belt 150, enables the synchronous belt transmission device 100 to meet the design requirements of being structurally compact and having a small volume, and further meets the design requirements of the three-dimensional forming device 200 being structurally compact and having a small volume, which is suitable for popularization and application.

[0082] It can be understood that in some possible examples, the rotating shaft of the rotating block 140 can also be arranged outside the synchronous belt 150.

[0083] In some possible embodiments provided by the present utility model, the three-dimensional forming device 200 further includes: a fixed seat 230, on which a threaded structure is installed or provided. The fixed seat 230 is connected to the printing platform 220. Thus, the lead screw 210 rotates driven by the synchronous belt 150, so that the fixed seat 230 connected to the lead screw 210 through the threaded structure moves relative to the lead screw 210 in the vertical direction, to drive the printing platform 220 to move relative to the base 110 in the vertical direction along the lead screw 210 to move to a suitable position.

[0084] Among them, the threaded structure can be a nut installed in the fixed seat 230, or the threaded structure can be a threaded structure machined on the inner wall of the sleeve, and the sleeve is installed on the fixed seat 230. Or, the fixed seat 230 can be provided with a through hole, and the inner wall of the through hole is machined with a threaded structure. Different settings of the threaded structure can meet the requirements of different structures of the fixed seat 230.

[0085] Among them, the number of the fixed seats 230 can be one, two, three or more. Among them, the number of the fixed seats 230 is less than that of the lead screws 210, so that part of the lead screws 210 are connected to the fixed seats 230 through the threaded structure, and the fixed seats 230 are connected to the printing platform 220 to realize the connection between the printing platform 220 and the lead screws 210. Or, the number of the fixed seats 230 can be the same as that of the lead screws 210, so that the fixed seats 230 are connected to the corresponding lead screws 210 through the threaded structure, and the fixed seats 230 are connected to the printing platform 220 to realize the connection between the printing platform 220 and the lead screws 210. Among them, the printing platform can include a hot bed assembly, and the hot bed assembly is connected to the lead screw 210 through the threaded structure.

[0086] Specifically, as Figure 1 、 Figure 2 shown, the number of the lead screws 210 is three, which are distributed on the left and right sides and the rear side of the three-dimensional forming device 200. The left and right directions of the three-dimensional forming device 200 can be as Figure 1As shown by arrow X therein. Correspondingly, the number of the fixing seats 230 is three. The fixing seats 230 are connected to the corresponding lead screws 210 through a threaded structure, and the three fixing seats 230 are respectively connected to the printing platform 220 to provide stable and reliable support for the printing platform 220.

[0087] In some possible embodiments provided by the present utility model, the three-dimensional forming device 200 further includes a guide rod 240 arranged in parallel with the lead screw 210. The bottom end of the guide rod 240 is connected to the base 110. The fixing seat 230 is sleeved on the guide rod 240 and can slide along the guide rod 240. The guide rod 240 and the fixing seat 230 cooperate with each other to play a good guiding role in the movement of the fixing seat 230 relative to the lead screw 210, which can improve the smoothness and reliability of the movement of the fixing seat 230 relative to the base 110 in the vertical direction, reduce the possibility of the printing platform 220 shaking, reduce the problems of printing defects, vertical stripes and wavy patterns on the printed product, and improve the printing quality.

[0088] Among them, the number of the guide rods 240 can be one, two, three, or other numbers. The number of the guide rods 240 can be less than, equal to, or greater than the number of the fixing seats 230. For example, one guide rod 240 can be set so that one fixing seat 230 and one guide rod 240 cooperate with each other to play a good guiding role. Or, for one fixing seat 230, two guide rods 240 can be set to cooperate with it to play a good guiding role. Or, one guide rod 240 can be set for each fixing seat 230 to achieve a limiting effect.

[0089] Specifically, as Figure 1 shown, the number of the fixing seats 230 is three, and the number of the guide rods 240 is four. Each of the left and right fixing seats 230 corresponds to one guide rod 240, and the fixing seat 230 located at the rear corresponds to two guide rods 240. This setting can further improve the smoothness and reliability of the movement of the fixing seat 230 relative to the base 110 in the vertical direction, reduce the possibility of the printing platform 220 shaking, and ensure good printing quality.

[0090] Specifically, as Figures 1 to 6 shown, the present utility model also provides the following implementation manners:

[0091] A three-dimensional forming device 200, the three-dimensional forming device 200 includes a synchronous belt transmission device 100 and a driven member to be driven. The driven member is driven to move by the synchronous belt transmission device 100. The synchronous belt transmission device 100 includes: a base 110; a driving part 120, the driving part 120 is arranged on the base 110, and the driving part 120 includes a driving wheel 121; a transmission wheel 130, the transmission wheel 130 drives the driven member to move; a rotating block 140, the first end of the rotating block 140 is rotatably connected to the first fulcrum of the base 110, a tensioning wheel 141 is arranged on the rotating block 140, and the rotating block 140 is provided with an adjustment hole 142 extending along the rotation direction; a synchronous belt 150, the synchronous belt 150 is sleeved and connected to the driving wheel 121, the transmission wheel 130 and the tensioning wheel 141; an elastic member 160, both ends of the elastic member 160 are respectively connected to the second end of the rotating block 140 and the second fulcrum of the base 110, the first fulcrum and the second fulcrum are the same or different, and the elastic member is in an energy storage state; a locking member 170, the locking member 170 passes through the adjustment hole 142 and is connected to the base 110 to lock and fix the rotating block 140 and the base 110.

[0092] Wherein, a connection hole for connecting with the locking member 170 is arranged on the base 110, a guiding hole 111 parallel to the adjustment hole 142 is further opened on the base 110, a guiding part is arranged on the rotating block 140, and the guiding part is received in the guiding hole 111 and can move along the guiding hole 111 so that the connection hole is located within the movement track of the adjustment hole 142.

[0093] Wherein, the connection point of the elastic member 160 and the rotating block 140 and the connection point of the elastic member 160 and the base 110 are in the same plane parallel to the horizontal plane; and / or the connection point of the rotating block 140 and the elastic member 160 and the connection point of the rotating block 140 and the base 110 are in the same plane parallel to the horizontal plane.

[0094] Wherein, the rotating block 140 is further provided with a rotating end 143 and a connecting end 144. The rotating end 143 is rotatably connected to the first fulcrum of the base 110 through a rotating shaft, and the connecting end 144 is connected or abutted against the elastic member 160; wherein, the rotating shaft is parallel to the rotating shaft of the tensioning wheel 141.

[0095] Wherein, the connecting end 144 is located on the side of the rotating block 140; and / or the adjustment hole 142 is located between the rotating end 143 and the tensioning wheel 141.

[0096] Among them, the elastic member 160 is a tension spring. The tension spring is in a stretched state. The first end of the tension spring is relatively fixed to the base 110, and the second end of the tension spring is connected to the connection end 144. The connection end 144 is arranged away from the rotation end 143; or the elastic member 160 is a spring. The spring is in a compressed state. The first end of the spring is relatively fixed to the base 110, and the second end of the spring is connected to the connection end 144. The connection end 144 is arranged away from the rotation end 143; or the elastic member 160 is a leaf spring. The leaf spring is in a compressed state. The first end of the leaf spring is relatively fixed to the base 110, and the second end of the leaf spring is connected to the connection end 144. The connection end 144 is arranged away from the rotation end 143; or the elastic member 160 is an elastic adhesive. The elastic adhesive is in a compressed state. The first end of the elastic adhesive is relatively fixed to the base 110, and the second end of the elastic adhesive is connected to the connection end 144. The connection end 144 is arranged away from the rotation end 143.

[0097] Among them, the elastic member 160 is a torsion spring. The torsion spring is in a torsional state. The torsion spring is arranged at the rotating shaft. The first torsion arm of the torsion spring is relatively fixed to the base 110, and the second torsion arm of the torsion spring is connected to or abuts against the connection end 144; or the elastic member 160 is a torsion spring. The torsion spring is in a torsional state. The torsion spring is rotatably arranged on the fixed column of the base 110. The first torsion arm of the torsion spring is relatively fixed to the base 110, and the second torsion arm of the torsion spring is connected to or abuts against the connection end 144.

[0098] Among them, the rotating block 140 and the elastic member 160 are located inside the area enclosed by the sequential connection of the driving wheel 121 and the transmission wheel 130.

[0099] Among them, the rotating shaft of the rotating block 140 is located inside the synchronous belt 150.

[0100] Among them, the range of the central angle of the adjustment hole 142 is less than or equal to 80°.

[0101] Among them, the three-dimensional forming device 200 further includes: a lead screw 210, and the lead screw 210 is connected to the driven member through a threaded structure;

[0102] a fixed seat 230, on which a threaded structure is installed or provided, and the fixed seat 230 is connected to the driven member; a guide rod 240 arranged in parallel with the lead screw 210. The guide rod 240 is connected to the base 110, and the fixed seat 230 passes through the guide rod 240 and can slide along the guide rod 240.

[0103] Among them, the driven member includes a printing platform 220 or a print head.

[0104] In the description of the present utility model, the term "a plurality of" means two or more, unless otherwise clearly defined. The orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model; terms such as "connection", "installation", "fixation", etc. should all be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0105] For those skilled in the art, the present utility model can have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A three-dimensional forming device, characterized in that: The three-dimensional forming equipment comprises a synchronous belt transmission device and a driven member, wherein the driven member is driven to move by the synchronous belt transmission device, and the synchronous belt transmission device comprises: Base; A driving part, the driving part is arranged on the base, and the driving part includes a driving wheel; A transmission wheel, wherein the transmission wheel drives the driven member to move; A rotating block, wherein the first end of the rotating block is rotatably connected to the first fulcrum of the base, a tensioning wheel is provided on the rotating block, and an adjustment hole extending along the rotating direction is opened on the rotating block; A synchronous belt, the synchronous belt is sleeved and connected to the driving wheel, the transmission wheel and the tensioning wheel; an elastic member, two ends of which are respectively connected to the second end of the rotating block and the second fulcrum of the base, the first fulcrum and the second fulcrum are the same or different, and the elastic member is in an energy storage state; A locking piece is passed through the adjusting hole and connected to the base to lock and fix the rotating block and the base.

2. The three-dimensional forming equipment according to claim 1, characterized in that: The base is provided with a connecting hole for connecting with the locking member, and the base is also provided with a guide hole parallel to the adjusting hole. The rotating block is provided with a guide portion, which is accommodated in the guide hole and can move along the guide hole so that the connecting hole is located within the movement trajectory of the adjusting hole.

3. The three-dimensional forming equipment according to claim 1, characterized in that: The connection point between the elastic member and the rotating block and the connection point between the elastic member and the base are in the same plane parallel to the horizontal plane; and / or The connection point between the rotating block and the elastic member and the connection point between the rotating block and the base are in the same plane parallel to the horizontal plane.

4. The three-dimensional forming equipment according to claim 1, characterized in that: The rotating block is also provided with a rotating end and a connecting end, the rotating end is rotatably connected to the first fulcrum of the base through a rotating shaft, and the connecting end is connected to or abuts against the elastic member; Wherein, the rotating shaft is parallel to the rotating axis of the tensioning wheel.

5. The three-dimensional forming device according to claim 4, characterized in that: The connecting end is located at a side of the rotating block; and / or The adjustment hole is located between the rotating end and the tensioning wheel.

6. The three-dimensional forming equipment according to claim 4, characterized in that: The elastic member is a tension spring, the tension spring is in a stretched state, the first end of the tension spring is relatively fixed to the base, the second end of the tension spring is connected to the connecting end, and the connecting end is arranged away from the rotating end; or The elastic member is a spring, the spring is in a compressed state, the first end of the spring is relatively fixed to the base, the second end of the spring is connected to the connecting end, and the connecting end is arranged away from the rotating end; or The elastic member is a spring sheet, the spring sheet is in a compressed state, the first end of the spring sheet is relatively fixed to the base, the second end of the spring sheet is connected to the connecting end, and the connecting end is arranged away from the rotating end; or The elastic member is an elastic rubber, the elastic rubber is in a compressed state, the first end of the elastic rubber is relatively fixed to the base, the second end of the elastic rubber is connected to the connecting end, and the connecting end is arranged away from the rotating end.

7. The three-dimensional forming equipment according to claim 4, characterized in that: The elastic member torsion spring is in a torsion state, the torsion spring is arranged at the rotating shaft, the first torsion arm of the torsion spring is relatively fixed to the base, and the second torsion arm of the torsion spring is connected to or abuts against the connecting end; or The elastic member is a torsion spring, which is in a torsion state. The torsion spring is rotatably arranged on a fixed column of the base. The first torsion arm of the torsion spring is relatively fixed to the base, and the second torsion arm of the torsion spring is connected to or abuts against the connecting end.

8. The three-dimensional forming device according to claim 1, characterized in that: The rotating block and the elastic member are located inside a region enclosed by a line connecting the driving wheel and the transmission wheel in sequence; and / or The rotating shaft of the rotating block is located inside the synchronous belt; and or The component to be driven includes a printing platform or a printing head.

9. The three-dimensional forming device according to claim 1, characterized in that: The range of the central angle of the adjusting hole is less than or equal to 80°.

10. The three-dimensional forming device according to claim 9, characterized in that: Also includes: A lead screw, the lead screw being connected to the driven member via a threaded structure; A fixing seat, on which the threaded structure is installed or provided, and the fixing seat is connected to the driven member; A guide rod is arranged parallel to the lead screw, the guide rod is connected to the base, and the fixing seat passes through the guide rod and can slide along the guide rod.

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