Laser engraving head assembly and laser processing device

Abstract

The invention relates to the technical field of laser processing, in particular to a laser engraving head assembly and a laser processing device. A laser engraving head assembly comprises a vertical base plate, the front end face of the vertical base plate is connected with an engraving head, the vertical base plate is connected with a cover body used for wrapping the engraving head, the cover body comprises side plates connected with the two sides of the vertical base plate respectively, one side plate is provided with a light inlet hole, the upper end of the vertical base plate is connected with an upper cover plate, and the lower end of the vertical base plate is provided with a light outlet hole. And a front cover plate is connected between the two side plates. By arranging the cover body structure, the carving head is protected in the cover body structure and is prevented from being invaded by smoke, and the service life of the carving head is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of laser processing, and in particular to a laser engraving head component and a laser processing device. Background Art

[0002] At present, small laser processing devices are widely used in manual operations. During processing, the material surface needs to be vaporized, melted, burned, etc.; smoke will be generated during the processing, and the smoke contains a large number of tiny solid particles. If these tiny particles drift to the reflective lens, focusing lens, etc. of the engraving head and adhere to them, it will affect the working environment of the engraving head and the working life of the engraving head. Summary of the invention

[0003] The purpose of the present invention is to provide a laser engraving head assembly to address the deficiencies of the prior art. The engraving head assembly has a good protective structure, which can prevent or reduce the invasion of smoke on the engraving head and effectively protect the engraving head.

[0004] A laser engraving head assembly comprises: a vertical substrate, a front end surface of the vertical substrate is connected to an engraving head, the vertical substrate is connected to a cover body for protecting the engraving head, the cover body comprises side plates respectively connected to two sides of the vertical substrate, one of the side plates is provided with a light inlet hole, an upper cover plate is connected to the upper end of the vertical substrate, and a front cover plate is connected between the two side plates.

[0005] Furthermore, the four sides of the vertical base plate are bent backward to form a rectangular ring, and the rear end face of the vertical plate is provided with at least one reinforcing rib; the rear end of the upper cover plate is bent and connected to the rectangular ring and the reinforcing rib, the side plate is fixedly connected to the side of the rectangular ring, the front end face of the side plate is provided with a plurality of plug-in holes, and the rear end face of the front cover plate is provided with plug-in columns matching the plug-in holes.

[0006] Furthermore, both sides of the vertical base plate are respectively connected with adjustment mechanisms for adjusting the use length of the synchronous belt.

[0007] Preferably, the adjustment mechanism includes two guide rods connected to the side surfaces of the vertical base plate, the inner ends of the two guide rods are connected with a connecting assembly for connecting to the end of the synchronous belt, a rotating frame is rotatably connected between the outer ends of the two guide rods, the rotating frame is provided with a rotating shaft connected to the guide rods, the rotating frame can rotate relative to the guide rods, and a main adjusting wheel and a secondary adjusting wheel are provided on both sides of the rotating frame, the main adjusting wheel is located between the rotating shaft and the connecting assembly, and the secondary adjusting wheel is located on the outside of the rotating frame; the rotating shaft is connected with an elastic member for driving the rotating frame to rotate.

[0008] Furthermore, the connecting assembly includes a main clamping block connected to the guide rod, and socket holes matching the connecting assembly are respectively provided on both sides of the main clamping block, and fastening holes connected to the socket holes are provided on the side of the main clamping block, and fasteners are provided in the fastening holes, and the fasteners abut against the guide rod; the main clamping block is connected to the auxiliary clamping block through a connecting piece.

[0009] Furthermore, the rotating frame includes two connecting plates, an adjustment groove is provided in the middle of the connecting plate, both ends of the rotating shaft respectively pass through the adjustment groove and are rotatably connected to the guide rod, the rotating shaft is provided with an external thread and is threaded with two limit nuts, and the limit nuts are respectively located on the outside of the corresponding connecting plates.

[0010] Furthermore, the rear end surface of the vertical substrate is connected with an upper pulley and a lower pulley, and an elastic component with adjustable elasticity is provided between the upper pulley or the lower pulley and the vertical substrate, and the elastic component pushes the upper pulley downward or the elastic component pushes the lower pulley upward.

[0011] Furthermore, the elastic component is arranged between the lower pulley and the vertical base plate, the elastic component includes a rotating block, one end of the rotating block is connected to the lower pulley, the middle or the other end of the rotating block is connected to a fixed shaft and is rotatably connected to the vertical base plate. When the other end of the rotating block is connected to the fixed shaft, the rotating block is provided with an shaft hole and is sleeved on the fixed shaft, the rotating block can rotate relative to the fixed shaft, and the fixed shaft is threadedly connected to the vertical base plate. The elastic component also includes a torsion spring, one end of the torsion spring is connected to the fixed shaft, and the other end of the torsion spring is connected to the rotating block; when the middle of the rotating block is connected to the fixed shaft, the other end of the rotating block is provided with a connecting hole and is connected to an adjusting rod, and the adjusting rod can adjust the connection position with the connecting hole, and the lower end of the rectangular ring is extended backward with a fixed block, and the middle part of the fixed block is provided with a through hole for the adjusting rod to pass through, and the lower end of the adjusting rod passes through the through hole; and an elastic member for pushing the adjusting rod downward is connected between the lower end of the adjusting rod and the fixed block.

[0012] Preferably, the connecting hole at the other end of the rotating block is a threaded hole, the upper end of the adjusting rod is provided with an external thread, the adjusting rod is threadedly connected to the rotating block, or the upper end of the adjusting rod is provided with an external thread and is connected with an adjusting nut, and the lower end of the adjusting nut abuts against the rotating block.

[0013] Furthermore, the elastic member can be a spring, the adjusting rod can be a bolt, the through hole on the fixed block is a waist-shaped hole, the lower end of the bolt is sleeved with the spring, one end of the spring is in contact with the head of the bolt, and the other end of the spring is in contact with the fixed block; the upper end of the bolt passes through the waist-shaped hole and is inserted into the connecting hole, when the connecting hole is a threaded hole, the length of the lower end of the bolt can be adjusted by directly rotating the bolt; when the connecting hole is a plain hole, the upper end of the bolt is connected to the adjusting nut, and the length of the lower end of the bolt can be adjusted by rotating the adjusting nut. Then the thrust of the spring on the rotating block is adjusted.

[0014] A laser processing device comprises a lateral movement mechanism and the above-mentioned laser engraving head assembly, wherein the lateral movement mechanism comprises a lateral guide rail, both ends of the lateral guide rail are respectively connected with synchronous pulleys, a synchronous belt is connected between the two synchronous pulleys, the middle of the synchronous belt is broken to form an open loop, and both ends of the synchronous belt respectively bypass the adjustment mechanisms on both sides of the engraving head and are connected to the corresponding connecting assemblies.

[0015] Furthermore, the upper end surface and the lower end surface of the transverse guide rail are respectively provided with guide grooves, the side surfaces of the upper pulley and the lower pulley protrude outward, and the upper pulley and the lower pulley are respectively abutted against the corresponding guide grooves.

[0016] The beneficial effects of the present invention are as follows: the present invention protects the engraving head by providing a cover structure, thereby preventing the engraving head from being disturbed by smoke, which is beneficial to prolonging the service life of the engraving head. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the laser processing device of this embodiment.

[0018] Figure 2 Schematic diagram of the structure of the laser engraving head assembly of this embodiment.

[0019] Figure 3 for Figure 2 Another perspective structural diagram of .

[0020] Figure 4 Schematic diagram of a rear view structure of the laser engraving head assembly of this embodiment.

[0021] Figure 5 A schematic diagram of the structure of the laser engraving head assembly of this embodiment without the front cover plate.

[0022] Figure 6 A schematic diagram of the structure of the laser engraving head assembly of this embodiment without the cover body.

[0023] Figure 7 for Figure 6 Another perspective structural diagram of .

[0024] Figure 8 for Figure 6 A partial decomposition diagram of .

[0025] Fig. 9 Schematic diagram of the connection between the laser engraving head assembly and the synchronous belt drive mechanism.

[0026] Fig.10 A schematic diagram of the cooperation between the transverse guide rail and the laser engraving head assembly.

[0027] Reference numerals: 1——Laser engraving head assembly; 2——Connecting assembly; 3——Adjusting mechanism; 5——Upper pulley; 6——Lower pulley; 7——Elastic assembly; 8——Horizontal guide rail; 9——Protruding ring; 11——Hood; 12——Vertical substrate; 13——Engraving head; 14——Rectangular ring; 15——Fixed block; 16——Reinforcement rib; 151——Perforation; 21——Main clamping block; 22——Auxiliary clamping block; 23——Bolt; 24——Fasteners; 31——Guide rod; 32——Auxiliary adjustment wheel; 33——Rotating shaft; 34——Main adjustment wheel; 35——Connecting piece; 36——Adjusting slot; 37——Limiting nut; 71——Rotating block; 72——Adjusting rod; 73——Elastic member; 74——Front fixing bolt; 75——Fixed shaft; 76——Rear fixing bolt; 711——axis hole; 81——guide groove; 91——through hole; 111——side plate; 112——upper cover plate; 113——front cover plate; 1111——light inlet hole; 1112——plug-in hole; 1121——bending portion. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] The present invention will be described in detail below with reference to the accompanying drawings. Figures 1 to 3 shown.

[0033] Example 1: See Figures 2 to 5 A laser engraving head assembly, comprising: a vertical substrate 12, a front end surface of the vertical substrate 12 is connected to an engraving head 13, the vertical substrate 12 is connected to a cover body 11 for protecting the engraving head 13, the cover body 11 comprises side panels 111 respectively connected to both sides of the vertical substrate 12, one of the side panels 111 is provided with a light inlet 1111, an upper cover plate 112 is connected to the upper end of the vertical substrate 12, and a front cover plate 113 is connected between the two side panels 111.

[0034] See attached Figure 2 , Figure 3 as well as Figure 5 In the technical solution, two side plates 111, a front cover plate 113 and an upper cover plate 112 are arranged so that they form a space with an opening at the lower end together with the vertical substrate 12, and the engraving head 13 is located in the space; when working, the laser is projected onto the engraving head 13 through the light inlet hole 1111, and the engraving head 13 performs engraving processing on the workpiece. The smoke generated during the engraving will be blown away by the air nozzle connected below the engraving head 13 (this is the prior art), and the smoke will temporarily float in the surrounding space of the engraving head 13, and then be sucked away by the exhaust device of the laser processing device; since a cover body 11 is formed around the engraving head 13, the smoke can be prevented from entering the inside of the engraving head 13 or near the engraving head 13, thereby avoiding the smoke generated during the engraving from affecting the engraving head 13.

[0035] See also Figure 6 , Figure 7 as well as Figure 8 The four sides of the vertical base plate 12 are bent backward to form a rectangular ring 14, and the rear end face of the vertical plate is provided with at least one reinforcing rib 16; the rear end of the upper cover plate 112 is bent and connected to the rectangular ring 14 and the reinforcing rib 16, the side plate 111 is fixedly connected to the side of the rectangular ring 14, the front end face of the side plate 111 is provided with a plurality of plug holes 1112, and the rear end face of the front cover plate 113 is provided with plug posts matching the plug holes 1112.

[0036] In order to facilitate the connection of the upper cover plate 112, the two side plates 111 and the front cover plate 113 with the vertical substrate 12, the present technical solution is provided with a rectangular ring 14 and a reinforcing rib 16; in the specific setting, in order to reduce the load and reduce the cost, the thickness of the vertical substrate 12 is relatively small, and when it is connected with the upper cover plate 112 and the side plate 111, it is not convenient to open a connecting hole on the side of the vertical substrate 12; therefore, the present technical solution is provided with a rectangular ring 14 on the rear end face of the vertical substrate 12, and the setting of the rectangular ring 14 widens the thickness of the side end of the vertical substrate 12. As shown in the figure, a connecting hole is provided on the side of the rectangular ring 14, and a through hole matching it is provided at the rear end of the side plate 111, and the side plate 111 is fixed to the side of the vertical substrate 12 by a connecting member such as a bolt. The rear end of the upper cover plate 112 is bent to form a bent portion 1121, and the bent portion 1121 is fixedly connected to the rectangular ring 14 and the reinforcing rib 16. The reinforcement ribs 16 can increase the connection position of the bending portion and improve the strength of the vertical substrate 12; secondly, when connecting the front cover 113 to the side plate 111, the technical solution adopts a plug-in method to facilitate the removal and installation of the front cover 113.

[0037] See also Figures 2 to 8 , the two sides of the vertical base plate 12 are respectively connected with an adjustment mechanism 3 for adjusting the use length of the synchronous belt. The adjustment mechanism 3 includes two guide rods 31 connected to the side of the vertical base plate 12, the inner ends of the two guide rods 31 are connected with a connecting assembly 2 for connecting with the end of the synchronous belt, and the outer ends of the two guide rods 31 are rotatably connected with a rotating frame, the rotating frame is provided with a rotating shaft 33 connected to the guide rods 31, and the rotating frame can rotate relative to the guide rods 31, and the two sides of the rotating frame are provided with a main adjustment wheel 34 and a secondary adjustment wheel 32, the main adjustment wheel 34 is located between the rotating shaft 33 and the connecting assembly 2, and the secondary adjustment wheel 32 is located on the outside of the rotating frame; the rotating shaft 33 is connected with an elastic member for pushing the secondary adjustment wheel 32 away from or close to one side of the synchronous belt.

[0038] See attached Figure 1 When the laser processing device is processing, a planar two-dimensional moving mechanism is generally provided to drive the engraving head 13 to move in a planar manner, so that the engraving head 13 can perform planar operations; the planar two-dimensional moving mechanism generally includes a transverse moving mechanism and a longitudinal moving mechanism arranged on both sides of the transverse moving mechanism, and the longitudinal moving mechanisms on both sides drive the transverse moving mechanism and the engraving head 13 to move longitudinally; the transverse moving mechanism drives the engraving to move transversely; the transverse moving mechanism generally adopts a synchronous belt transmission mechanism, and the synchronous belt transmission mechanism includes two synchronous belt pulleys and a synchronous belt. The transverse moving mechanism is provided with a transverse guide rail 8, and the engraving head 13 is slidably connected to the transverse guide rail 8. At the same time, the engraving head 13 is connected to the synchronous belt, and the synchronous belt transmission mechanism drives the engraving head 13 to move transversely along the transverse guide rail 8.

[0039] When the synchronous belt drives the engraving head 13 to move laterally, since the synchronous belt is generally made of rubber material, which is an elastic material and has a certain elasticity; the synchronous belt itself will be stretched. When the engraving head 13 runs at a low speed, such as 400mm / s or below, the resistance between the engraving head 13 and the transverse guide rail 8, and the wind resistance of the engraving head 13 are relatively small, and the stretching elongation of the synchronous belt is very small; the synchronous belt has little effect on the moving position of the engraving head 13. When the engraving head 13 increases its speed, the wind resistance of the engraving head 13 will increase, and the tensile force of the synchronous belt will increase. When the speed increases by a certain amount, such as 800mm / s or above, the amount of elongation of the synchronous belt due to the tensile force will increase, and this elongation will affect the accuracy of the moving position of the engraving head 13. Therefore, it is necessary to offset the elongation of the synchronous belt, reduce or offset the offset of the moving position of the engraving head 13 caused by the expansion and contraction of the synchronous belt, so that the engraving head 13 can move within the error range.

[0040] In order to facilitate the connection between the synchronous belt transmission mechanism and the engraving head 13, the middle part of the synchronous belt is broken to form two ends, which are respectively connected to the connecting components 2 on both sides of the vertical substrate 12. At the same time, both ends of the synchronous belt are passed through a synchronous wheel, and then passed through the main adjustment wheel 34 and the auxiliary adjustment wheel 32 of the rotating frame, and finally connected to the connecting component 2; the synchronous belt is in contact with the main adjustment wheel 34 and the auxiliary adjustment wheel 32 of the rotating frame.

[0041] For the convenience of explanation, by way of example, the synchronous belt segment between the right connecting component 2 and the right synchronous wheel is set as the right use segment; the synchronous belt segment between the left connecting component 2 and the left synchronous wheel is set as the left use segment; during operation, one of the left use segment and the right use segment applies tension to the engraving head 13, and the other moves along with it; the synchronous belt will stretch a certain amount for the segment that applies tension, and when the tension increases to a certain value, the elongation of the synchronous belt reaches a certain value, which will affect the accuracy of the moving position of the engraving head 13. When engraving, when the length of the left use segment or the right use segment is stretched, the length of the left use segment or the right use segment becomes longer relative to the length used under normal circumstances before. If the length of this part is not offset, the moving position of the engraving head 13 will have an error.

[0042] See also Fig. 9 , taking the rightward movement as an example, the operation of the adjustment mechanism 3 of the technical solution is explained. The connection point between the synchronous belt and the synchronous pulley on the right is set as point A, the contact points between the synchronous belt and the auxiliary adjustment wheel 32 and the main adjustment wheel 34 are set as points B and C respectively, the connection circuit between the synchronous belt and the connecting component 2 is set as point D, and the connection point between the rotating frame and the guide rod 31 is set as point E; in order to simplify the structure, point E is set between the main adjustment wheel 34 and the auxiliary adjustment wheel 32.

[0043] Secondly: The rotating shaft 33 is connected with an elastic member for pushing the auxiliary adjustment wheel 32 away from or close to one side of the synchronous belt, which can be a torsion spring ( Fig. 9 The elastic member exerts a moment N on the point E; the elastic member can be a torsion spring, or an arc-shaped spring sheet, etc.

[0044] Set the angle ω2=0.5*(180°-∠BCD); ω1=0.5*(180°-∠ABC); the tension of the synchronous belt is F; the resultant force of the synchronous belt on points B and C are: Fb=2F*sin(ω1); Fc=2F*sin(ω2); the distances between points B, C and point E are L1 and L2 respectively; under normal circumstances, the torque is balanced, then: Fb*L1+N=Fc*L2; According to the above formula, and substituting the values ​​of Fb and Fc, we can get the following formula: sin(ω1)+N / (2F*L1)= sin(ω2)*(L2 / L1); When the tension of the synchronous belt increases, that is, F increases, since the change of the rotating frame is relatively small, N (torque) is almost unchanged, and N can be assigned a positive or negative value according to the direction of the torque. In this embodiment, N is assigned a positive value; L1 and L2 are both fixed values. When the synchronous belt reaches a balance with the rotating frame again, ω1 decreases and ω2 increases; that is: ∠ABC increases, and ∠BCD decreases; corresponding to the attached figure: the rotating frame rotates, so that the auxiliary adjustment wheel 32 moves away from the synchronous belt; the auxiliary adjustment wheel 32 and the main adjustment wheel 34 still remain in contact with the synchronous belt.

[0045] like Fig. 9 As shown; in actual work, the length of the AB segment is much larger than that of the BC segment and the CD segment; when ω1 decreases and ω2 increases, the change in the length of the AB segment is much larger than the change in the length of the CD segment. At this time, the length of the entire AD segment becomes longer relative to before.

[0046] When the tension of the synchronous belt increases, the increase in the length of the AD segment is equivalent to the elongation of the AD segment of the synchronous belt under the tension F. Therefore, when running at low speed or high speed, it will basically not affect the moving position of the engraving head 13, and the engraving accuracy of the engraving head 13 is maintained.

[0047] It can be seen that after setting the adjustment mechanism 3, when the tension of the synchronous belt changes, the rotating frame of the adjustment mechanism 3 rotates to adjust the length of the use section of the synchronous belt, so that the length of the use section of the synchronous belt is equivalent to the length of the synchronous belt after extension and contraction, thereby improving the movement accuracy of the engraving head 13.

[0048] See also Figure 6 , Figure 7The connecting assembly 2 includes a main clamping block 21 connected to the guide rod 31, and sleeve holes matching the connecting assembly 2 are respectively provided on both sides of the main clamping block 21. A fastening hole connected to the sleeve hole is provided on the side of the main clamping block 21, and a fastener 24 is provided in the fastening hole, and the fastener 24 abuts against the guide rod 31; the main clamping block 21 is connected to the auxiliary clamping block 22 through a connecting piece.

[0049] The connecting component 2 is in the form of connecting the main clamping block 21 and the auxiliary clamping block 22 to clamp the end of the synchronous belt, thereby forming a connection with the end of the synchronous belt. The connecting component 2 can also be in other forms. Secondly, the main clamping block 21 is provided with a socket hole so that the connecting component 2 can move relative to the guide rod 31, so that the connecting component 2 can adjust the tension of the use section of the synchronous belt during the movement, and the adjustment is convenient. It can be understood that when adjusting the position of the main clamping block 21, it can be adopted that: the guide rod 31 is provided with an external thread and is threadedly connected with an adjusting nut, and the adjusting nut is in contact with the main clamping block 21; by adjusting the position of the adjusting nut, the position of the main clamping block 21 is pushed to move, so as to achieve the effect of adjusting the tension of the synchronous belt. Secondly, since the position of the connecting component 2 is relatively close to the main adjustment wheel 34, the ω2 angle can also be adjusted within a certain range of tension.

[0050] The main clamping block 21 and the auxiliary clamping block 22 can be connected by bolts 23 or by riveting.

[0051] See also Figure 6 , Figure 7 , Figure 8 The rotating frame includes two connecting plates 35, and an adjustment groove 36 is provided in the middle of the connecting plate 35. The two ends of the rotating shaft 33 pass through the adjustment groove 36 respectively and are rotatably connected to the guide rod 31. The rotating shaft 33 is provided with an external thread and is threaded with two limit nuts 37. The limit nuts 37 are respectively located on the outer sides of the corresponding connecting plates 35.

[0052] In order to adapt to various synchronous belts, an adjustment slot 36 is provided on the connecting piece 35 to facilitate adjustment of the distance between the main adjustment wheel 34, the auxiliary adjustment wheel 32 and the rotating shaft 33. When adjusting, loosen the limit nut 37, move the connecting piece 35, and adjust the relative position of the rotating shaft 33 and the connecting piece 35. After the adjustment is completed, tighten the limit nut 37.

[0053] Secondly, it can be understood that the rotating frame can adopt another structure: the rotating frame includes two connecting plates 35, the middle part of the connecting plate 35 is provided with an axial hole and is connected to the rotating shaft 33, and the two sides of the connecting plate 35 are respectively provided with adjustment grooves 36, and the middle part of the main adjustment wheel 34 and the auxiliary adjustment wheel 32 are both provided with connecting shafts, and the two ends of the connecting shafts respectively pass through the connecting grooves of the connecting plate 35, and the ends of the connecting shafts are threadedly connected with nuts.

[0054] At this time, relative to the rotating frame, the position of the rotating shaft 33 remains unchanged, and the positions of the main adjusting wheel 34 and the auxiliary adjusting wheel 32 are adjustable, that is, the size of L1 and L2 are adjustable. The main adjusting wheel 34 and the auxiliary adjusting wheel 32 can both be objects such as bearings that can rotate around their own connecting axes.

[0055] Embodiment 2: A laser processing device comprises a lateral moving mechanism and the above-mentioned laser engraving head assembly 1, wherein the lateral moving mechanism comprises a lateral guide rail 8, both ends of the lateral guide rail 8 are respectively connected to synchronous pulleys, a synchronous belt is connected between the two synchronous pulleys, the middle of the synchronous belt is broken to form an open loop, and both ends of the synchronous belt are respectively passed around the adjustment mechanism 3 on both sides of the engraving head 13 and connected to the corresponding connecting assembly 2.

[0056] See also Figure 7 , Figure 8 And 10, the upper end face and the lower end face of the transverse guide rail 8 are respectively provided with a guide groove 81, the rear end face of the vertical base plate 12 is connected with an upper pulley 5 and a lower pulley 6, the side surfaces of the upper pulley 5 and the lower pulley 6 protrude outward, and the upper pulley 5 and the lower pulley 6 are respectively abutted against the corresponding guide groove 81; an elastic component 7 with adjustable elasticity is provided between the upper pulley 5 or the lower pulley 6 and the vertical base plate 12, and the elastic component 7 pushes the upper pulley 5 or the lower pulley 6 toward the transverse guide rail 8.

[0057] The engraving head 13 moves back and forth laterally driven by the synchronous belt transmission mechanism. In order to enable the engraving head 13 to move linearly without shaking when moving back and forth, the technical solution sets a guide groove 81 on the upper end face and the lower end face of the transverse guide rail 8; at the same time, an upper pulley 5 and a lower pulley 6 are correspondingly set on the rear end face of the vertical substrate 12, and the upper pulley 5 and the lower pulley 6 are respectively inserted into the guide groove 81, and move along the guide groove 81 during the movement; with the cooperation of the upper pulley 5, the lower pulley 6 and the corresponding guide groove 81, the engraving head 13 moves linearly along the transverse guide rail 8.

[0058] During operation, the lower end of the upper pulley 5 is located in the guide groove 81 of the upper end surface of the transverse guide rail 8, and the upper end of the lower pulley 6 is located in the guide groove 81 of the lower end surface of the transverse guide rail 8, so the upper pulley 5, the lower pulley 6 and the transverse guide rail 8 are clamped together. When assembling the engraving head 13 and the transverse guide rail 8, most people currently adopt the method of installing the upper pulley 5 and the lower pulley 6 during assembly, which will result in limited installation space, very time-consuming and labor-intensive installation, and low efficiency. At present, some people adopt an elastic structure, and the upper pulley 5 or the lower pulley 6 is connected to the vertical base plate 12 through an elastic arm, so that the position of the upper pulley 5 and the lower pulley 6 can be adjusted, so that the upper pulley 5 and the lower pulley 6 can be conveniently clamped into the corresponding guide groove 81.

[0059] Secondly, after long-term operation, due to the wear of the upper pulley 5 and the lower pulley 6, the upper pulley 5 will drop relatively and the lower pulley 6 will rise relatively; and the elastic arm generally cannot adjust the elasticity, resulting in the upper pulley 5 and the lower pulley 6 weakening the clamping force of the transverse guide rail 8. During operation, the engraving head 13 will shake up and down, and the elastic arm needs to be disassembled to adjust the elastic force. In this embodiment, the elasticity of the elastic component 7 is adjustable. When the clamping force of the upper pulley 5 and the lower pulley 6 on the transverse guide rail 8 weakens, the elasticity of the elastic component 7 is directly adjusted, so that the upper pulley 5 and the lower pulley 6 maintain a certain clamping force on the transverse guide rail 8, avoiding the shaking of the engraving head 13.

[0060] See also Figure 7 , Figure 8 The elastic component 7 is arranged between the lower pulley 6 and the vertical base plate 12. The elastic component 7 includes a rotating block 71. One end of the rotating block 71 is connected to the lower pulley 6. The middle part or the other end of the rotating block 71 is connected to a fixed shaft 75 and is rotatably connected to the vertical base plate 12. When the other end of the rotating block 71 is connected to the fixed shaft 75, the rotating block 71 is provided with an axial hole and is sleeved with the fixed shaft 75. The fixed shaft 75 is threadedly connected to the vertical base plate 12. The elastic component 7 also includes a torsion spring. One end of the torsion spring is connected to the fixed shaft 75. The other end of the torsion spring is connected to the rotating block 71. When the middle part of the rotating block 71 is connected to the fixed shaft 75, the rotating block 71 can still rotate relative to the fixed shaft 75. The other end of the rotating block 71 is provided with a connecting hole and is connected to an adjusting rod 72. The adjusting rod 72 can adjust the connection position with the connecting hole. A fixed block 15 is extended backward from the lower end of the rectangular ring 14. A through hole 151 is provided in the middle part of the fixed block 15 for the adjusting rod 72 to pass through. The lower end of the adjusting rod 72 passes through the through hole 151; and an elastic member 73 for pushing the adjusting rod 72 downward is connected between the lower end of the adjusting rod 72 and the fixed block 15.

[0061] See also Figure 7 , the lower pulley 6 is connected to one end of the rotating block 71; in this embodiment, the second structure is adopted, and the middle part of the rotating block 71 is rotatably connected to the vertical substrate 12 through the fixed shaft 75, so that the rotating block 71 can rotate relative to the vertical substrate 12; see Figure 8 A convex ring 9 is provided on the back of the vertical substrate 12, and the end face of the convex ring 9 is flush with the end face of the rectangular ring 1414, and a through hole 91 is provided in the middle of the convex ring 9; the fixed shaft 75 is sleeved in the convex ring 9, and the fixed shaft 75 is stepped. The fixed shaft 75 includes a thick circular tube section and a thin circular tube section. The thick circular tube section is sleeved into the convex ring 9 and is connected with a front fixing bolt 74, and the front fixing bolt 74 is connected to the front end face of the vertical substrate 12; the thin circular tube section is inserted into the axial hole 711 in the middle of the rotating block 71, and the rotating block 71 can rotate relative to the thin circular tube section. The thin circular tube section is connected with a rear fixing bolt 76, and the head of the rear fixing bolt 76 is arranged adjacent to the rotating block 71.

[0062] The other end of the rotating block 71 is connected to the adjusting rod 72 through a connecting hole. The elastic member pushes the adjusting rod 72 to move downward, and the adjusting rod 72 drives the rotating block 71 to rotate, so that the lower pulley 6 moves upward; the lower pulley 6 cooperates with the upper pulley 5 to clamp the transverse guide rail 8; at the same time, during installation, the adjusting rod 72 can be adjusted first to make the lower pulley 6 move downward under its own gravity, and the distance between the lower pulley 6 and the upper pulley 5 is greater than or equal to the vertical width of the transverse guide rail 8, so as to facilitate the installation of the vertical base plate 12 and the transverse guide rail 8.

[0063] It is also understandable that the first structure can also adjust the force of the rotating block 71 on the lower pulley 6 by adopting a torsion spring; under normal circumstances, the torsion spring provides torque to the rotating block 71, so that the lower pulley 6 moves upward; when the torque needs to be changed, the fixed shaft 75 is rotated to change the torque of the torsion spring.

[0064] See also Figure 8 The other end connection hole of the rotating block 71 is a threaded hole, the upper end of the adjusting rod 72 is provided with an external thread, and the adjusting rod 72 is threadedly connected to the rotating block 71. Of course, the following structure can also be adopted: the upper end of the adjusting rod 72 is provided with an external thread and connected with an adjusting nut, and the lower end of the adjusting nut abuts against the rotating block 71.

[0065] In order to facilitate the adjustment of the relative position between the adjusting rod 72 and the connecting hole, the connecting hole can be set as a threaded hole, and the adjusting rod 72 is threadedly connected to the threaded hole. The position of the adjusting rod 72 and the connecting hole can be adjusted by rotating the adjusting rod 72. Of course, an adjusting nut can also be used. By rotating the adjusting nut, the connection position of the adjusting rod 72 and the connecting hole changes. In this way, the connection position between the adjusting rod 72 and the rotating block 71 is adjusted, and then the length of the lower end of the adjusting rod 72 below the fixed block 15 is adjusted, so as to adjust the deformation of the elastic member and the elastic force applied by the elastic member to the rotating block 71.

[0066] Secondly, the elastic member can be a spring, and the adjusting rod 72 can be a bolt. The through hole on the fixing block 15 is a waist-shaped hole. The lower end of the bolt is sleeved with the spring, one end of the spring is in contact with the head of the bolt, and the other end of the spring is in contact with the fixing block 15. The upper end of the bolt passes through the waist-shaped hole and is inserted into the connecting hole. When the connecting hole is a threaded hole, the length of the lower end of the bolt can be adjusted by directly rotating the bolt. When the connecting hole is a smooth hole, the upper end of the bolt is connected to the adjusting nut, and the length of the lower end of the bolt can be adjusted by rotating the adjusting nut. Then the thrust of the spring on the rotating block 71 is adjusted.

[0067] Many features of the second embodiment can be applied to the first embodiment, such as the structure of the lower pulley, the elastic component with adjustable elasticity, etc. For those skilled in the art, it should not be limited to the second embodiment when they understand it.

[0068] 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 head assembly, comprising: A vertical substrate, the front end surface of which is connected to an engraving head, characterized in that: the vertical substrate is connected to a cover body for protecting the engraving head, the cover body includes side panels respectively connected to both sides of the vertical substrate, one of the side panels is provided with a light inlet hole, the upper end of the vertical substrate is connected to an upper cover plate, and a front cover plate is connected between the two side panels.

2. The laser engraving head assembly according to claim 1, characterized in that: Adjustment mechanisms for adjusting the use length of the synchronous belt are respectively connected to both sides of the vertical base plate.

3. The laser engraving head assembly according to claim 2, characterized in that: The adjustment mechanism includes two guide rods connected to the side surfaces of the vertical base plate, the inner ends of the two guide rods are connected to a connecting assembly for connecting to the end of a synchronous belt, a rotating frame is rotatably connected between the outer ends of the two guide rods, the rotating frame is provided with a rotating shaft connected to the guide rods, the rotating frame can rotate relative to the guide rods, and a main adjusting wheel and a secondary adjusting wheel are provided on both sides of the rotating frame, the main adjusting wheel is located between the rotating shaft and the connecting assembly, and the secondary adjusting wheel is located on the outside of the rotating frame; the rotating shaft is connected to an elastic member for driving the rotating frame to rotate.

4. The laser engraving head assembly according to claim 3, characterized in that: The connecting assembly includes a main clamping block connected to the guide rod, and sleeve holes matching the connecting assembly are respectively provided on both sides of the main clamping block. A fastening hole connected to the sleeve hole is provided on the side of the main clamping block, and a fastener is provided in the fastening hole, which abuts against the guide rod; the main clamping block is connected to the auxiliary clamping block through a connecting piece.

5. The laser engraving head assembly according to claim 3, characterized in that: The rotating frame includes two connecting plates, the middle of which is provided with an adjustment groove, the two ends of the rotating shaft respectively pass through the adjustment groove and are rotatably connected to the guide rod, the rotating shaft is provided with an external thread and is threadedly connected with two limit nuts, and the limit nuts are respectively located on the outer sides of the corresponding connecting plates.

6. The laser engraving head assembly according to claim 1, characterized in that: The rear end surface of the vertical base plate is connected with an upper pulley and a lower pulley. An elastic component with adjustable elasticity is arranged between the upper pulley or the lower pulley and the vertical base plate. The elastic component pushes the upper pulley downward or the elastic component pushes the lower pulley upward.

7. The laser engraving head assembly according to claim 6, characterized in that: The cam is connected with the upper and lower wheels of the vehicle, and the cam is connected with the upper and lower wheels of the vehicle, and the cam is connected with the upper and lower wheels of the vehicle, and the cam is connected with the lower and lower wheels of the vehicle, and the cam is connected with the lower and lower wheels of the vehicle, and the cam is connected with the lower and lower wheels of the vehicle, and the cam is connected with the lower and lower wheels of the vehicle, and the cam is connected with the lower and lower wheels of the vehicle, and the cam is connected with the 8. The laser engraving head assembly according to claim 7, characterized in that: The connecting hole at the other end of the rotating block is a threaded hole, the upper end of the adjusting rod is provided with an external thread, the adjusting rod is threadedly connected to the rotating block, or the upper end of the adjusting rod is provided with an external thread and connected with an adjusting nut, and the lower end of the adjusting nut abuts against the rotating block.

9. The laser engraving head assembly according to claim 8, characterized in that: The elastic member is a spring, the adjusting rod is a bolt, the through hole on the fixing block is a waist-shaped hole, the lower end of the bolt is sleeved with the spring, one end of the spring is abutted with the head of the bolt, and the other end of the spring is abutted with the fixing block; the upper end of the bolt passes through the waist-shaped hole and is inserted into the connecting hole.

10. A laser processing device, comprising a lateral movement mechanism, characterized in that: It also includes the laser engraving head assembly according to any one of claims 1 to 9, wherein the lateral moving mechanism includes a lateral guide rail, both ends of the lateral guide rail are respectively connected to synchronous pulleys, a synchronous belt is connected between the two synchronous pulleys, the middle of the synchronous belt is broken to form an open loop, and both ends of the synchronous belt respectively bypass the adjustment mechanisms on both sides of the engraving head and are connected to corresponding connecting components.

Images