Laser engraving cutting machine

Abstract

The invention relates to the technical field of laser processing devices, in particular to a laser engraving cutting machine. The device comprises a transverse guide rail; the synchronous belt transmission mechanism comprises two synchronous belt wheels and a synchronous belt, the two synchronous belt wheels are fixed to the two sides of the transverse guide rail respectively, and one synchronous belt wheel is connected with a servo motor; the carving head is in sliding connection with the transverse guide rail; the middle of the synchronous belt is broken to form two ends, and the two sides of the carving head are provided with connecting structures connected with the ends of the synchronous belt respectively. Adjusting mechanisms used for adjusting the using length of the belt are further arranged on the two sides of the carving head respectively, and when the pulling force of the synchronous belt on the carving head is increased, the using length of the synchronous belt is increased. The adjusting mechanisms are arranged on the two sides of the engraving head correspondingly, the use length of the synchronous belt can be adjusted, deviation caused by large elongation of the synchronous belt at a high speed is reduced, errors are reduced, and use precision is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing devices, and in particular to a laser engraving and cutting machine. Background Art

[0002] At present, laser engraving and cutting machines are used for engraving of some handicrafts, such as engraving patterns on the surface of wooden materials, glass bottles or metal cans, etc. At present, laser engraving and cutting machines are relatively stable when running at low speed. When the engraving head runs at high speed, such as reaching 800mm / s or more, the engraving head will shake seriously, resulting in low precision and deviation when engraving. Summary of the invention

[0003] The purpose of the present invention is to provide a laser engraving and cutting machine to address the deficiencies of the prior art. The laser engraving head of the laser engraving machine will not shake or the shaking amplitude is small when it moves horizontally at high speed, which can basically meet the engraving requirements and has relatively high precision.

[0004] A laser engraving and cutting machine, comprising: lateral guide rails; The synchronous belt transmission mechanism includes two synchronous belt wheels and a synchronous belt. The two synchronous belt wheels are respectively fixed on both sides of the transverse guide rail, and one of the synchronous belt wheels is connected to a servo motor. The engraving head is slidably connected to the transverse guide rail; the middle of the synchronous belt is broken to form two ends, and connection structures connected to the ends of the synchronous belt are respectively provided on both sides of the engraving head; Adjustment mechanisms for adjusting the use length of the belt are also provided on both sides of the engraving head. When the tension of the synchronous belt on the engraving head increases, the use length of the synchronous belt increases.

[0005] Preferably, the adjustment mechanism includes: two connecting rods arranged at intervals, the two connecting rods are connected to one side of the engraving head, a rotating frame is rotatably connected between the two connecting rods, the rotating frame is located on the outside of the connecting structure, the rotating frame is provided with a main push member and an auxiliary push member that abut against the synchronous belt and are located on both sides, the main push member is located between the auxiliary push member and the connecting structure, and the main push member and the auxiliary push member are both located on the same side of the synchronous belt, and an elastic member for driving the rotating frame to rotate is connected between the rotating frame and at least one of the connecting rods.

[0006] Furthermore, the main push member is a main sleeve ring, and the auxiliary push member is an auxiliary sleeve ring; the front and rear sides of the rotating frame are respectively provided with a main fixed shaft and an auxiliary fixed shaft, the main sleeve ring is sleeved with the main fixed shaft, and the auxiliary sleeve ring is sleeved with the auxiliary fixed shaft.

[0007] Furthermore, connecting plates are respectively provided on the upper and lower sides of the rotating frame, and the two ends of the connecting plate are respectively connected to the main push member and the auxiliary push member; a connecting shaft is provided in the middle of the rotating frame, and the two ends of the connecting shaft are respectively rotatably connected to the ends of the two connecting rods, and a connecting groove is provided in the middle of the connecting plate, and the middle of the connecting shaft passes through the connecting grooves of the two connecting plates; an external thread is provided in the middle of the connecting shaft and is threadedly connected to two fixing nuts, and the two fixing nuts are respectively located on both sides of the rotating frame and respectively abut against the adjacent connecting plates.

[0008] Furthermore, the connection structure includes a main clamping block, both sides of which are respectively provided with through holes matching the connecting rod, the main clamping block is sleeved with the connecting rod, one side of the main clamping block is connected to a secondary clamping block, the main clamping block is fixedly connected to the secondary clamping block and clamps one end of the synchronous belt.

[0009] Preferably, a concave hole is provided on one side of the main clamping block, and the auxiliary clamping block is located in the concave hole.

[0010] Furthermore, an external thread is provided in the middle of the connecting rod and is connected to two adjusting nuts, and the two adjusting nuts are respectively located on both sides of the main clamping block.

[0011] Furthermore, the connecting rod is provided with a plurality of axial holes arranged at intervals, and one end of the connecting shaft is connected to one of the axial holes.

[0012] Furthermore, a plug hole matching with the connecting rod is provided on the side of the engraving head, and the connecting rod is inserted into the plug hole.

[0013] Furthermore, the engraving head is connected to a vertical substrate, and the connecting rod is connected to the side of the vertical substrate; the upper end and the lower end of the back side of the vertical substrate are respectively connected to an upper pulley and a lower pulley, and an annular groove is provided in the middle of the side of the upper pulley and the lower pulley, and the upper end face and the lower end face of the transverse guide rail are respectively connected to a guide rod, and the guide rod cooperates with the annular groove.

[0014] Furthermore, the upper pulley is connected to the back side of the vertical substrate through an upper connecting shaft, a circular concave hole is provided at the lower end of the front side of the vertical substrate, an adjusting wheel is provided in the circular concave hole, an eccentric hole is provided in the middle of the adjusting wheel, a movable hole is provided on the back side of the vertical substrate, the movable hole is communicated with the eccentric hole, the lower pulley is connected with a lower connecting shaft, one end of the lower connecting shaft passes through the movable hole and extends into the eccentric hole, and the lower connecting shaft is connected to the adjusting wheel; a fastening hole is provided on the outer end face of the adjusting wheel, and a fastener for fixing the adjusting wheel is provided in the fastening hole.

[0015] Beneficial effects of the present invention: The present invention can adjust the use length of the synchronous belt by arranging adjustment mechanisms on both sides of the engraving head, reduce the deviation caused by the large elongation of the synchronous belt at high speed, reduce the error and ensure the use accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the laser engraving and cutting machine of this embodiment.

[0017] Figure 2 It is a schematic diagram of the coordination structure of the transverse guide rail, the synchronous belt transmission mechanism, and the engraving head.

[0018] Figure 3 The present invention is a structural schematic diagram of the cooperation between the engraving head, the connecting structure and the adjusting mechanism.

[0019] Figure 4 for Figure 3 Another perspective structural diagram of .

[0020] Figure 5 for Figure 3 A partial exploded view of .

[0021] Figure 6 This is a schematic diagram of the trajectory changes of the left side segment of the synchronous belt during use.

[0022] Reference numerals: 1——transverse guide rail; 2——synchronous belt; 3——engraving head; 4——connecting structure; 5——adjusting mechanism; 6——synchronous pulley; 7——guide rod; 8——upper connecting shaft; 9——circular concave hole; 10——vertical base plate; 11——bolt; 12——movable hole; 13——adjusting wheel; 14——lower connecting shaft; 15——fastening hole; 16——upper pulley; 17——lower pulley; 18——fastener; 19——eccentric hole; 41——main clamping block; 42——auxiliary clamping block; 43——bolt; 44——nut; 51——connecting rod; 52——axial hole; 53——connecting shaft; 54——connecting groove; 55——connecting plate; 56——fixing nut; 57——main push piece; 58——auxiliary push piece; 59——adjusting nut. DETAILED DESCRIPTION

[0023] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] The present invention will be described in detail below with reference to the accompanying drawings. Figures 1 to 6 shown.

[0028] Example 1: See Figure 1 , Figure 2 A laser engraving and cutting machine, comprising: a transverse guide rail 1, a synchronous belt transmission mechanism and an engraving head 3; the synchronous belt transmission mechanism comprises two synchronous belt pulleys 6 and a synchronous belt 2, the two synchronous belt pulleys 6 are respectively fixed on both sides of the transverse guide rail 1, and one of the synchronous belt pulleys 6 is connected to a servo motor; the engraving head 3 is slidably connected to the transverse guide rail 1; the middle part of the synchronous belt 2 is broken and forms two ends, and connecting structures 4 connected to the ends of the synchronous belt 2 are respectively provided on both sides of the engraving head 3; adjustment mechanisms 5 for adjusting the use length of the belt are also respectively provided on both sides of the engraving head 3, and when the pulling force of the synchronous belt 2 on the engraving head 3 increases, the use length of the synchronous belt 2 increases.

[0029] See attached Figure 3 , Figure 4 This technical solution adds an adjustment mechanism 5 to the existing technology, and the use length of the belt is adjusted by the adjustment mechanism 5. When using a traditional laser engraving and cutting machine, it can generally only move horizontally at a low speed, such as below 600mm / s; this will cause the laser engraving and cutting machine to run slowly and the engraving efficiency to be relatively low; when the speed is increased to 800mm / s or above, the movement of the engraving head 3 begins to become unstable, especially when the engraving head 3 turns around to engrave back and forth. At first, the applicant thought that it might be due to resonance. After many adjustments, it was found that the main factors were the synchronous belt 2 and wind resistance.

[0030] The synchronous belt 2 is flexible. When it is used normally at low speed, the expansion and contraction of the synchronous belt 2 is not noticed. At low speed, the wind resistance of the engraving head 3 is small, so the tensile force of the synchronous belt 2 on the engraving head 3 is relatively small; when it reaches high speed, the wind resistance encountered by the engraving head 3 becomes larger, and the tensile force of the synchronous belt 2 on the engraving head 3 increases greatly, causing the synchronous belt 2 to be stretched. A force analysis of the synchronous belt 2 shows that only a part of the synchronous belt 2 is stretched, and the stretching section corresponding to this part is the synchronous belt section between the connecting structure 4 on one side of the engraving head 3 and the synchronous belt pulley 6 on the same side; when the length of the stretching section exceeds the length range of normal operation before, the use length of the synchronous belt 2 is lengthened; although the use length of the synchronous belt 2 is lengthened (the lengthened length is relatively small relative to the synchronous belt), when the synchronous belt 2 is engaged with the synchronous belt pulley 6, since the lengthened length per unit length is very limited, there will be no misalignment when the belt teeth of the synchronous belt 2 are engaged with the concave holes of the synchronous belt pulley 6, but it will affect the accuracy of the engraving.

[0031] When engraving an object, when it is necessary to calculate the displacement and coordinate position of the engraving head 3, these values ​​are calculated according to the normal length of the synchronous belt 2; when the synchronous belt 2 is extended to a long length, the position of the engraving head 3 will have a delayed error, and in severe cases, the engraving head 3 will be temporarily loose.

[0032] To solve this problem, the present application adopts an adjustment mechanism 5 provided on both sides of the engraving head 3. When the tension of the synchronous belt 2 on one side increases, the adjustment mechanism 5 increases the use length of the synchronous belt 2 on that side. The use section of the synchronous belt 2 on that side becomes longer due to the increase in tension, and the increased length is offset or partially offset by the adjustment mechanism 5, so that when the engraving head 3 moves, its moving coordinate position is within the error range.

[0033] See also Figure 3 , Figure 4 as well as Figure 5 The adjustment mechanism 5 includes: two spaced connection rods 51, the two connection rods 51 are connected to one side of the engraving head 3, a rotating frame is rotatably connected between the two connection rods 51, the rotating frame is located on the outside of the connecting structure 4, and the rotating frame is provided with a main push member 57 and an auxiliary push member 58 that abut against the synchronous belt 2 and are located on both sides, the main push member 57 is located between the auxiliary push member 58 and the connecting structure 4, and the main push member 57 and the auxiliary push member 58 are both located on the same side of the synchronous belt 2; an elastic member is connected between the rotating frame and at least one of the connection rods 51.

[0034] This technical solution adjusts the use length of the synchronous belt 2 by rotating the frame. When in use, refer to Figure 1, one end of the synchronous belt 2 will bypass the synchronous pulley 6 on one side, and then bypass the rotating frame and the connecting structure 4 on one side, and when bypassing the rotating frame, it will respectively abut against the main push member 57 and the auxiliary push member 58, the main push member 57 and the auxiliary push member 58 are respectively located on both sides of the rotating frame, and are respectively subjected to the thrust of the belt; at low speed, the main push member 57 and the auxiliary push member 58 maintain balance; when the engraving head 3 runs at high speed, for example, the engraving head 3 moves to the left at high speed, the wind resistance of the engraving head 3 increases, the force of the synchronous belt 2 on the engraving head 3 increases, the tension of the synchronous belt 2 itself increases, and its own length increases; at the same time, the thrust of the synchronous belt 2 on the main push member 57 and the auxiliary push member 58 located on the left side of the engraving head 3 increases.

[0035] See attached Figure 6 , Figure 6 The figure is a schematic diagram of the trajectory change of the left side of the synchronous belt 2 during use; the dotted line part is the trajectory of the synchronous belt 2 under normal conditions, and the solid line part is the trajectory state after the tension of the synchronous belt 2 is increased. For the convenience of description, the contact point between the synchronous belt 2 and the synchronous pulley 6 on the left is A, the contact point between the auxiliary push member 58 on the left is B, the contact point between the main push member 57 on the left is C, the hinge point between the rotating frame and the connecting rod 51 is E, and the connection point between the synchronous belt 2 and the connecting structure 4 on the left is F; Figure 6 As shown, the engraving head 3 generally works in the middle area, ∠ABC is greater than ∠BCF, and the rotating frame keeps balance at low speed. The force of the synchronous belt on point B is: Fb=F1*cos(∠ABC / 2), and the force of the synchronous belt on point C is: Fc=F1*cos(∠BCF / 2); where F1 is the tension of the synchronous belt at low speed; the torque of point B on point E is: N1=Fb*BE, and the torque of point C on point E is: N2=Fc*CE; BE represents the distance from point B to point E, and CE represents the distance from point C to point E; the torque of the elastic member on point E is N0; when the rotating frame is balanced, N1+N0=N2; substituting the above formula into, we have: cos(∠ABC / 2)+N0 / (F1*BE)= cos(∠BCF / 2)*CE / BE.

[0036] When the rotating frame is in use, BE and CE are fixed values, and ∠ABC and ∠BCF change in opposite directions. When the tension of the synchronous belt increases, the synchronous belt causes its own elasticity to change, making the length of its use segment AF longer. Therefore, it is necessary to make the use length of AF longer. Figure 6In the case of a synchronous belt, point B needs to rotate toward one side, that is, the angle ∠ABC decreases and the angle ∠BCF increases. Due to the small change in angle, the torque change of the elastic part is very small and can be regarded as almost unchanged. The cos (∠ABC / 2) value increases, and the N0 / (F1*BE) value becomes: N0 / (F2*BE), and this value decreases. F2 is the new tension of the synchronous belt. The cos (∠BCF / 2)*CE / BE value decreases. By setting specific BE and CE values, the equation can be established again or nearly established.

[0037] When the tension of the synchronous belt increases to F2, the rotating frame rotates; the contact point C rotates a short distance around the point E, and the contact point B rotates a short distance around the point E; because the point C is very close to the point F, the change in the distance of the CF segment caused by the movement of the point C is very small; while the change in the length between AB caused by the movement of the contact point B is relatively large; the lateral distance between point A and point B is much larger than the longitudinal distance between them, and the slight movement of the contact point B will cause a relatively large change in the length of the AB segment of the synchronous belt, such as Figure 6 As shown, after the tension of the synchronous belt 2 increases, point B moves away from point A, the length of the synchronous belt AB segment increases, and the length of the entire AF segment increases relative to before. If the increased length is equivalent to the elongated length of the synchronous belt 2 in this segment, that is, the length of the synchronous belt AF segment after the tension increases can be equivalent to the length of the AF segment track after the rotating frame rotates, then when the engraving head 3 moves horizontally, its horizontal coordinate can remain unchanged or be within the error range. This avoids lateral deviation of the engraving head 3 during engraving.

[0038] The elastic member may be a torsion spring, for example, arranged on the connecting shaft 53, for driving the rotating frame to rotate; the torsion direction of the torsion spring is related to the direction in which the synchronous belt passes around the rotating frame. When the synchronous belt passes around from the inside or outside of the rotating frame, the torsion direction of the torsion spring may be different. The torsion of the torsion spring needs to be set according to the actual structure.

[0039] See also Figure 3 , Figure 4 The main push member 57 is a main sleeve ring, and the auxiliary push member 58 is an auxiliary sleeve ring; the front and rear sides of the rotating frame are respectively provided with a main fixed shaft and an auxiliary fixed shaft, the main sleeve ring is sleeved with the main fixed shaft, and the auxiliary sleeve ring is sleeved with the auxiliary fixed shaft.

[0040] In order to reduce the influence of friction on the movement of the synchronous belt 2, the technical scheme exemplarily sets the main thrust member 57 and the auxiliary thrust member 58 as the main sleeve and the auxiliary sleeve respectively, and the main sleeve and the auxiliary sleeve can rotate relative to the main fixed axis and the auxiliary fixed axis respectively; when the tension of the synchronous belt 2 changes, the use length of the synchronous belt 2 changes, the synchronous belt 2 shrinks to a certain extent, the force applied by the synchronous belt 2 to the main sleeve and the auxiliary sleeve changes, the rotating frame rotates at a small angle, and the main sleeve and the auxiliary sleeve rotate slightly; the friction between the synchronous belt 2 and the main sleeve and the auxiliary sleeve is very small, and will hardly affect the rotation of the rotating frame.

[0041] Secondly, it can be understood that: the main push member 57 and the auxiliary push member 58 can also be rollers, and shafts are respectively provided on both sides of the rollers, and the shafts are connected to the frame body of the rotating frame; wherein the shafts can rotate relative to the frame body of the rotating frame, that is, the shafts are rotatably connected to the rotating frame, such as through bearings; of course, the rollers can also rotate around the shafts themselves, such as setting the rollers as bearings, the middle part of the bearings is sleeved with the shafts, and the shafts are connected to the frame body of the rotating frame.

[0042] See also Figures 3 to 5 , connecting pieces 55 are respectively provided on the upper and lower sides of the rotating frame, and the two ends of the connecting piece 55 are respectively connected to the main push piece 57 and the auxiliary push piece 58; a connecting shaft 53 is provided in the middle of the rotating frame, and the two ends of the connecting shaft 53 are respectively rotatably connected to the ends of the two connecting rods 51, and a connecting groove 54 is provided in the middle of the connecting piece 55, and the middle of the connecting shaft 53 passes through the connecting grooves 54 of the two connecting pieces 55; an external thread is provided in the middle of the connecting shaft 53 and is threadedly connected to two fixing nuts 56, which are respectively located on both sides of the rotating frame and respectively abut against the adjacent connecting pieces 55.

[0043] In order to enable the rotating frame to rotate relative to the connecting rod 51, the technical solution adopts a connecting shaft 53 provided in the middle of the rotating frame, and the two ends of the connecting shaft 53 are respectively connected to the corresponding connecting rod 51 for rotation. In the specific setting, an axial hole 52 can be provided on the connecting rod 51, and the end of the connecting shaft 53 is sleeved with the axial hole 52 of the connecting rod 51 and can rotate relatively. Of course, a bearing can also be provided in the axial hole 52, and the connecting shaft 53 is rotatably connected to the connecting rod 51 through the bearing; considering that the end of the connecting shaft 53 can be made smooth and the friction coefficient between the connecting rod 51 is very small, the bearing can be omitted and the sleeve can be directly connected. Of course, it can be understood that the rotating frame can adopt a shaft sleeve provided in the middle, a bearing is provided in the shaft sleeve and connected to the connecting shaft, and the two ends of the connecting shaft are respectively connected to the corresponding connecting rod 51. This method can also realize that the rotating frame can rotate relative to the connecting rod 51. In order to simplify the structure, the shaft sleeve can be omitted and the connecting shaft can be directly used.

[0044] Secondly, in specific use, different synchronous belt materials will cause different shrinkage changes of the synchronous belt 2 when the synchronous belt 2 is in use. For this reason, it is necessary to adjust the auxiliary push member that causes the change in the length of the synchronous belt 2. For example, when the shrinkage change of the synchronous belt 2 is relatively large, that is, the elastic modulus of the synchronous belt 2 is large; in design, when the synchronous belt 2 drives the rotating frame to rotate, the movement of the auxiliary push member 58 should be relatively large. How to make the movement of the auxiliary push member 58 relatively large? Specifically in this embodiment, the connecting shaft 53 and the connecting groove 54 are matched, such as Figure 3 , Figure 6 As shown, the main push member 57, the auxiliary push member 58 and the connecting shaft 53 are connected as a whole and form a lever structure. The connection point between the connecting shaft 53 and the connecting rod 51 is the fulcrum, and the main push member 57 and the auxiliary push member 58 are the two ends of the lever respectively. By adjusting the distance between the fulcrum and the two ends, such as moving the connecting shaft 53 to the right relative to the connecting groove 54, the distance from the fulcrum to the main push member 57 is reduced, and the distance from the fulcrum to the auxiliary push member 58 is increased; when the tension of the synchronous belt 2 is increased, the main push member 57 rotates at a small angle, and the auxiliary push member 58 also rotates at a small angle, such as Figure 6 As shown, the distance between the main push member 57 and the fulcrum is smaller than the distance between the auxiliary push member 58 and the fulcrum, and the moving distance of the auxiliary push member 58 is relatively larger. The moving distance of the auxiliary push member 58 is relatively increased, and the distance between the auxiliary push member 58 and the synchronous belt pulley 6 will also be relatively increased to adapt to the synchronous belt 2 with a larger shrinkage.

[0045] When the contraction amount of the synchronous belt 2 is relatively small, the connecting piece 55 can be moved to the left relative to the connecting shaft 53, so that the distance between the main push member 57 and the fulcrum is increased, and the distance between the auxiliary push member 58 and the fulcrum is reduced; when the force applied to the synchronous belt 2 increases (such as acceleration driving the engraving head 3, or high-speed driving the engraving head 3), the synchronous belt 2 applies pressure to the main push member 57 and the auxiliary push member 58, and the main push member 57 rotates a small angle in the direction away from the synchronous belt 2, and the auxiliary push member 58 also rotates a small angle in the direction close to the synchronous belt 2; due to the change in the distance between the main push member 57, the auxiliary push member 58 and the fulcrum, the displacement of the auxiliary push member 58 is relatively small, resulting in a small change in the distance between the auxiliary push member 58 and the synchronous belt pulley 6 on the left, so as to be suitable for the synchronous belt 2 with a relatively small contraction amount.

[0046] Secondly, when adjusting the position of the connecting shaft 53 in the connecting groove 54 , the fixing nut 56 may be loosened first so that the connecting shaft 53 can move in the connecting groove 54 ; after selecting a good position, the two fixing nuts 56 are tightened to clamp the two connecting plates 55 .

[0047] It is understandable that four fixing nuts 56 can be threadedly connected to the connecting shaft 53 , two fixing nuts 56 form a group and correspond to a connecting sheet 55 , and the two fixing nuts 56 are respectively located on both sides of the connecting sheet 55 to clamp the connecting sheet 55 .

[0048] See also Figures 3 to 5 The connecting structure 4 includes a main clamping block 41, and both sides of the main clamping block 41 are respectively provided with through holes matching the connecting rod 51. The main clamping block 41 is sleeved with the connecting rod 51, and one side of the main clamping block 41 is connected to a secondary clamping block 42. The main clamping block 41 is fixedly connected to the secondary clamping block 42 and clamps one end of the synchronous belt 2.

[0049] In order to facilitate the setting of the connection structure 4, the technical solution sets the connection structure 4 as a combination of a main clamp block 41 and a secondary clamp block 42, and the main clamp block 41 and the secondary clamp block 42 are connected by a connecting piece, which can be specifically: the main clamp block 41 and the secondary clamp block 42 are both provided with connection holes, and the connecting piece is a bolt 43, one end of the bolt 43 passes through the connection holes of the main clamp block 41 and the secondary clamp block 42 and is connected to the nut 44; at the same time, the end of one end of the synchronous belt 2 is clamped between the main clamp block 41 and the secondary clamp block 42. It can be understood that: only one of the main clamp block 41 and the secondary clamp block 42 can be provided with a through hole, and the other can be provided with a threaded hole, and the bolt 43 is used to pass through the through hole and be threadedly connected with the threaded hole, and at the same time, the end of one end of the synchronous belt 2 is clamped.

[0050] See also Figure 4 A concave hole is provided on one side of the main clamping block 41, and the auxiliary clamping block 42 is located in the concave hole.

[0051] By providing a concave hole on the main clamping block 41 and arranging the auxiliary clamping block 42 in the concave hole, the main clamping block 41 and the auxiliary clamping block 42 can be conveniently connected.

[0052] See also Figures 3 to 5 The middle part of the connecting rod 51 is provided with an external thread and is connected with two adjusting nuts 59 , and the two adjusting nuts 59 are respectively located on both sides of the main clamping block 41 .

[0053] Two adjusting nuts 59 are provided and cooperated with the connecting rod 51 to adjust the position of the main clamping block 41; and further, the distance between the connecting structure 4 and the main push piece can be adjusted. When the distance between the connecting structure 4 and the main push piece changes, the angle between the front and rear of the synchronous belt 2 will increase when it bypasses the main push piece; thus, the influence of the tension of the synchronous belt 2 on the main push piece will increase; that is, when the engraving head 3 is running at high speed or under large acceleration, the synchronous belt 2 will push the main push piece to rotate a relatively large angle, and at the same time, the secondary push piece will also rotate a relatively large angle. Since the length between the synchronous belt pulley 6 on the left side of the synchronous belt 2 and the secondary push piece is much greater than the length between the synchronous belt 2 and the main push piece and the connecting structure 4, the distance change between the synchronous belt 2 and the secondary push piece is mainly considered. After the relative increase in the movement of the secondary push piece, the use length of the synchronous belt 2 will increase. It can be seen that the left and right movement of the connecting structure 4 relative to the rotating frame will increase the use length of the synchronous belt 2 at high speed. Specifically in this embodiment, by setting two adjusting nuts 59 and sleeve connection between the main clamping block 41 and the connecting rod 51, the position of the main clamping block 41 can be adjusted, thereby adjusting the increase in the use length of the synchronous belt 2 at high speed.

[0054] Furthermore, the connecting rod 51 is provided with a plurality of axial holes 52 arranged at intervals, and one end of the connecting shaft 53 is connected to one of the axial holes 52 .

[0055] A plurality of axial holes 52 are provided on the connecting rod 51 so that the position of the rotating frame can be adjusted; the distance between the rotating frame and the connecting structure 4 can be adjusted, thereby affecting the change in the length of the synchronous belt 2 at high speed.

[0056] See also Figure 2 The side of the engraving head 3 is provided with a plug hole matching with the connecting rod 51, and the connecting rod 51 is inserted into the plug hole.

[0057] The connecting rod 51 and the plug-in hole can be connected by a fitting connection or an interference fit connection; the connection position of the connecting rod 51 and the engraving head 3 can be adjusted by plugging, and the distance between the rotating frame, the connecting structure 4 and the engraving head 3 can also be adjusted; the tension of the synchronous belt 2 can be adjusted.

[0058] Preferably, the engraving head 3 is provided with a fastening hole 15 , which is communicated with the plug hole, and the fastening hole 15 is threadedly connected with a bolt 11 , which abuts against the connecting rod 51 .

[0059] The fastening holes 15 and the bolts 11 are provided to adjust and fix the connecting rod 51 .

[0060] See also Figure 3The engraving head 3 is connected to a vertical substrate 10, and the connecting rod 51 is connected to the side of the vertical substrate 10; the upper end and the lower end of the back side of the vertical substrate 10 are respectively connected to an upper pulley 16 and a lower pulley 17, and an annular groove is provided in the middle of the side of the upper pulley 16 and the lower pulley 17, and the upper end face and the lower end face of the transverse guide rail 1 are respectively connected to a guide rod 7, and the guide rod 7 cooperates with the annular groove.

[0061] See also Figure 1 The vertical plate is connected to the transverse guide rail 1 through the upper pulley 16 and the lower pulley 17. At the same time, the upper pulley 16 and the lower pulley 17 are respectively slidably connected to the guide rod 7 on the upper end surface and the lower end surface of the transverse guide rail 1, so that when the engraving head 3 moves horizontally, the upper pulley 16 and the lower pulley 17 roll along the corresponding guide rod 7 respectively. This structure can play a good guiding role and prevent the engraving head 3 from shaking during the horizontal movement.

[0062] See also Figures 3 to 5 The upper pulley 16 is connected to the back of the vertical base plate 10 through the upper connecting shaft 8. A circular concave hole 9 is provided at the lower end of the front side of the vertical base plate 10, and an adjusting wheel 13 is provided in the circular concave hole 9. An eccentric hole 19 is provided in the middle of the adjusting wheel 13. A movable hole 12 is provided on the back side of the vertical base plate 10, and the movable hole 12 is communicated with the eccentric hole 19. The lower pulley 17 is connected to a lower connecting shaft 14, one end of the lower connecting shaft 14 passes through the movable hole 12 and extends into the eccentric hole 19, and the lower connecting shaft 14 is connected to the adjusting wheel 13; a fastening hole 15 is provided on the outer end surface of the adjusting wheel 13, and a fastener 18 for fixing the adjusting wheel 13 is provided in the fastening hole 15.

[0063] Since the upper and lower end surfaces of the transverse guide rail 1 are respectively provided with guide rods 7, and the guide rods 7 protrude from the upper and lower end surfaces of the transverse guide rail 1, when assembling the engraving head 3 with the transverse guide rail 1, it is impossible to directly install the upper pulley 16 and the lower pulley 17 on the guide rods 7 on both sides; currently, it is generally adopted that the upper pulley 16 and the lower pulley 17 are not installed first, and the vertical substrate 10 is first moved close to the transverse guide rail 1, and then the upper pulley 16 and the lower pulley 17 are installed; this installation method is very inconvenient during assembly due to limited operating space. However, the present technical solution adopts a movable lower pulley 17 structure, and the upper pulley 16 and the lower pulley 17 can be installed on the vertical substrate 10 first. The adjusting wheel 13 is connected with an eccentrically arranged lower connecting shaft 14, and the lower connecting shaft 14 is connected with the lower pulley 17; when assembling, the adjusting wheel 13 is operated to rotate so that the eccentric hole 19 of the adjusting wheel 13 is located at the lower position of the adjusting wheel 13, so that the distance between the lower pulley 17 and the upper pulley 16 is greater than the distance between the guide rods 7 on both sides; then the vertical base plate 10 is moved, the upper pulley 16 is located above the upper guide rod 7, and the lower pulley 17 is located below the lower guide rod 7, and then the vertical base plate 10 is moved downward, the annular groove of the upper pulley 16 cooperates with the upper guide rod 7, and the lower pulley 17 moves downward and is located below the lower guide rod 7; finally, the adjusting wheel 13 is operated to rotate so that the lower pulley 17 moves upward and abuts against the lower guide rod 7, so that the lower guide rod 7 cooperates with the annular groove of the lower pulley 17. After the adjustment is completed, the adjusting wheel 13 is fixed with the fastener 18.

[0064] By operating the adjusting wheel 13, the engraving head 3 can be conveniently assembled with the transverse guide rail 1, and the overall use is convenient and quick.

[0065] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A laser engraving and cutting machine, comprising: lateral guide rails; The synchronous belt transmission mechanism includes two synchronous belt wheels and a synchronous belt. The two synchronous belt wheels are respectively fixed on both sides of the transverse guide rail, and one of the synchronous belt wheels is connected to a servo motor. The engraving head is slidably connected to the transverse guide rail; the middle of the synchronous belt is broken to form two ends, and connection structures connected to the ends of the synchronous belt are respectively provided on both sides of the engraving head; Features: Adjustment mechanisms for adjusting the use length of the belt are also provided on both sides of the engraving head. When the tension of the synchronous belt on the engraving head increases, the use length of the synchronous belt increases.

2. The laser engraving and cutting machine according to claim 1, characterized in that: The adjustment mechanism includes: two connecting rods arranged at intervals, the two connecting rods are connected to one side of the engraving head, a rotating frame is rotatably connected between the two connecting rods, the rotating frame is located on the outside of the connecting structure, the rotating frame is provided with a main push member and an auxiliary push member that abut against the synchronous belt and are located on both sides, the main push member is located between the auxiliary push member and the connecting structure, and the main push member and the auxiliary push member are both located on the same side of the synchronous belt, and an elastic member for driving the rotating frame to rotate is connected between the rotating frame and at least one of the connecting rods.

3. The laser engraving and cutting machine according to claim 2, characterized in that: The main push member is a main sleeve ring, and the auxiliary push member is an auxiliary sleeve ring; the front and rear sides of the rotating frame are respectively provided with a main fixed shaft and an auxiliary fixed shaft, the main sleeve ring is sleeved with the main fixed shaft, and the auxiliary sleeve ring is sleeved with the auxiliary fixed shaft.

4. The laser engraving and cutting machine according to claim 2, characterized in that: The upper and lower sides of the rotating frame are respectively provided with connecting plates, and the two ends of the connecting plates are respectively connected to the main push piece and the auxiliary push piece; the middle part of the rotating frame is provided with a connecting shaft, and the two ends of the connecting shaft are respectively rotatably connected to the ends of the two connecting rods, and the middle part of the connecting plate is provided with a connecting groove, and the middle part of the connecting shaft passes through the connecting grooves of the two connecting plates; the middle part of the connecting shaft is provided with an external thread and is threadedly connected with two fixing nuts, and the two fixing nuts are respectively located on both sides of the rotating frame and respectively abut against the adjacent connecting plates.

5. The laser engraving and cutting machine according to claim 2, characterized in that: The connection structure includes a main clamping block, and through holes matching the connecting rod are respectively provided on both sides of the main clamping block. The main clamping block is sleeved with the connecting rod, and a secondary clamping block is connected to one side of the main clamping block. The main clamping block and the secondary clamping block are fixedly connected and clamp one end of the synchronous belt.

6. The laser engraving and cutting machine according to claim 5, characterized in that: A concave hole is arranged on one side of the main clamping block, and the auxiliary clamping block is located in the concave hole.

7. The laser engraving and cutting machine according to claim 5, characterized in that: The middle part of the connecting rod is provided with an external thread and is connected with two adjusting nuts, and the two adjusting nuts are respectively located on both sides of the main clamping block.

8. The laser engraving and cutting machine according to claim 4, characterized in that: The connecting rod is provided with a plurality of axial holes arranged at intervals, and one end of the connecting shaft is connected to one of the axial holes.

9. The laser engraving and cutting machine according to claim 2, characterized in that: The engraving head is connected to a vertical substrate, and the connecting rod is connected to the side of the vertical substrate; the upper end and the lower end of the back of the vertical substrate are respectively connected to an upper pulley and a lower pulley, and an annular groove is provided in the middle of the side of the upper pulley and the lower pulley, and the upper end face and the lower end face of the transverse guide rail are respectively connected to guide rods, and the guide rods cooperate with the annular grooves.

10. The laser engraving and cutting machine according to claim 9, characterized in that: The upper pulley is connected to the back side of the vertical base plate through an upper connecting shaft, a circular concave hole is provided at the lower end of the front side of the vertical base plate, an adjusting wheel is provided in the circular concave hole, an eccentric hole is provided in the middle of the adjusting wheel, a movable hole is provided at the back side of the vertical base plate, the movable hole is communicated with the eccentric hole, the lower pulley is connected with a lower connecting shaft, one end of the lower connecting shaft passes through the movable hole and extends into the eccentric hole, and the lower connecting shaft is connected to the adjusting wheel; a fastening hole is provided on the outer end face of the adjusting wheel, and a fastener for fixing the adjusting wheel is provided in the fastening hole.

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