Four-degree-of-freedom laser scanning device

Abstract

The utility model relates to a four-degree-of-freedom laser scanning device, which comprises a laser and a laser turning device, the laser and the laser turning device are arranged adjacently; the laser direction changing device is used for changing the direction of laser emitted by the laser so as to perform scanning in different directions, and the laser direction changing device comprises a laser light path adjusting assembly, a lens group, a first moving assembly and a second moving assembly; the laser light path adjusting assembly is used for guiding laser emitted by the laser into the lens group; the first moving assembly is used for driving the lens group to move in a vertical plane; the second moving assembly is used for driving the orientation of an exit port of the lens group. According to the utility model, the laser and the laser turning device are adjacent, so that lasers of different specifications can be replaced, and the structure is simple; and the motion space of the laser beam is improved, so that the laser beam can scan in a wider angle and range, and the applicability and flexibility of the laser scanning equipment in practical applications such as material processing, welding and surface treatment are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser scanning equipment technical field especially relates to a four degree of freedom laser scanning device. BACKGROUND

[0002] With the rapid development of laser technology, laser is increasingly widely used in the fields of material processing, welding and surface treatment. The traditional laser scanning equipment usually has single or limited degrees of freedom, which leads to its limitation in processing efficiency and flexibility. In the prior art, although some multi-degree-of-freedom laser scanning devices have been put into the market, most of the implementation ways are complex and high in cost, which is difficult to meet the needs of wide application. The above problems need to be solved urgently. SUMMARY

[0003] The utility model discloses a, aim at solving the technical problem in prior art.

[0004] The utility model discloses the following technical scheme:

[0005] The utility model provides a four degree of freedom laser scanning device, it includes laser and laser direction changing device, laser and laser direction changing device adjacent arrangement, laser direction changing device is used for the laser that laser sent is changed direction to carry out the scanning of different direction, laser direction changing device includes laser light path adjustment subassembly, lens group, first mobile subassembly and second mobile subassembly, laser light path adjustment subassembly is used for guiding the laser that laser sent enters lens group, first mobile subassembly is used for driving lens group moves in vertical plane, second mobile subassembly is used for driving lens group moves to change the exit of lens group.

[0006] In the four degree of freedom laser scanning device of the utility model, the laser light path adjustment subassembly includes first direction changing subassembly, second direction changing subassembly and third direction changing subassembly, first direction changing subassembly is used for guiding the laser that laser sent enters second direction changing subassembly, second direction changing subassembly is installed in the mobile end of first mobile subassembly, is used for guiding the laser that first direction changing subassembly exports to third direction changing subassembly, third direction changing subassembly is installed in second mobile subassembly, is used for guiding the laser that second direction changing subassembly exports to lens group.

[0007] In the four degree of freedom laser scanning device of the utility model, first mobile subassembly includes horizontal moving part and vertical moving part, the mobile end of horizontal moving part is connected with vertical moving part, and the vertical moving part is provided with second direction changing subassembly at one end in the vertical direction, and the second mobile subassembly is arranged on the mobile end.

[0008] The horizontal moving piece and the vertical moving piece are both linear guide rail mechanisms.

[0009] In the four-degree-of-freedom laser scanning device, the second moving assembly comprises a first mounting frame, a first rotating driving piece, a second mounting frame, a second rotating driving piece and a third mounting frame; the first mounting frame is mounted on the moving end of the first moving assembly; the first rotating driving piece is used for driving the second mounting frame to rotate in a first direction; the third mirror of the third direction-changing assembly is mounted on the second mounting frame; the rotation axis of the third mirror is collinear with incident light of the third mirror; the second rotating driving piece is mounted on the second mounting frame and is used for driving the third mounting frame to rotate in a second direction; the fourth mirror of the third direction-changing assembly and the lens group are mounted on the third mounting frame; the rotation axis of the fourth mirror is collinear with incident light of the fourth mirror; and the lens group is arranged on an outgoing light path of the fourth mirror.

[0010] In the four-degree-of-freedom laser scanning device, the first rotating driving piece comprises a first motor, a first gear set and a first rotating shaft; the first motor drives the first rotating shaft to rotate through the first gear set; one end of the first rotating shaft is connected to the first gear set, and the other end of the first rotating shaft is connected to the second mounting frame after penetrating through the first mounting frame.

[0011] In the four-degree-of-freedom laser scanning device, the second rotating driving piece comprises a second motor, a second gear set and a second rotating shaft; the second motor drives the second rotating shaft to rotate through the second gear set; one end of the second rotating shaft is connected to the second gear set, and the other end of the second rotating shaft is connected to the third mounting frame after penetrating through the second mounting frame.

[0012] In the four-degree-of-freedom laser scanning device, the first mounting frame has a containing space containing the second mounting frame inside; and the second mounting frame has a containing space containing the third mounting frame inside.

[0013] In the four-degree-of-freedom laser scanning device, the first direction-changing assembly comprises at least one first mirror.

[0014] In the four-degree-of-freedom laser scanning device, the lens group comprises a shell, a first lens and a second lens; the shell is a cylinder with two open sides; the first lens and the second lens are arranged in parallel and coaxially in the shell, and the first lens and / or the second lens can be moved to change the distance between the first lens and the second lens.

[0015] The technical scheme adopted by the utility model can achieve the following beneficial effects:

[0016] The utility model mainly provides a kind of four degrees of freedom laser scanning device, based on with laser direction changing device the laser that laser output carries out direction changing, realize the laser that output can be oriented multiple directions, wherein, with first mobile subassembly and second mobile subassembly drive lens group moves, and then change the position and orientation of lens group, with laser light path adjustment component ensure with lens group moves always the laser that laser output is guided into lens group, and then realize multidirectional scanning, laser and laser direction changing device are set to adjacent, then different specifications laser can be replaced, simple structure;By promoting the movement space of laser beam, it can be scanned in more extensive angle and range, will significantly improve the applicability and flexibility of laser scanning equipment in material processing, welding and surface treatment and other practical applications. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in embodiment description, constitutes the part of the utility model, the schematic embodiments of the utility model and its explanation explain the utility model, and do not constitute undue limitation on the utility model. In the drawings:

[0018] Figure 1 It is the structural schematic diagram of a kind of four degrees of freedom laser scanning device of the utility model;

[0019] Figure 2 It is the structural schematic diagram of laser direction changing device of the utility model;

[0020] Figure 3 It is the structural schematic diagram of first mobile subassembly and second mobile subassembly of the utility model;

[0021] Figure 4 It is the structural schematic diagram of second mobile subassembly of the utility model one;

[0022] Figure 5 It is the structural schematic diagram of second mobile subassembly of the utility model two;

[0023] Figure 6 It is the structural schematic diagram of lens group of the utility model one;

[0024] Figure 7 It is the structural schematic diagram of lens group of the utility model two.

[0025] Explanations of reference signs:

[0026] 1. laser; 2. laser direction changing device; 21. laser light path adjusting assembly; 211. first direction changing assembly; 2111. first mirror; 212. second direction changing assembly; 2121. second mirror; 213. third direction changing assembly; 2131. third mirror; 2132. fourth mirror; 22. lens assembly; 221. housing; 222. first lens; 223. second lens; 23. first moving assembly; 231. horizontal moving part; 232. vertical moving part; 24. second moving assembly; 241. first mounting frame; 242. first rotating driving part; 2421. first motor; 2422. first gear set; 2423. first rotating shaft; 243. second mounting frame; 244. second rotating driving part; 2441. second motor; 2442. second gear set; 2443. second rotating shaft; 245. third mounting frame. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present application more clear, the technical scheme of the present application will be described clearly and completely below in combination with the specific embodiments of the present application and corresponding drawings. In the description of the present application, it should be noted that the term "or" is generally used in the meaning of including "and / or", unless the content is explicitly indicated otherwise.

[0028] In the description of the present application, it should be noted that, unless explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or magnetic connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, the terms "first", "second" and the like are only used for distinguishing description, and cannot be understood as indicating or implying relative importance. In the description of the present application, the meaning of "multiple" is at least two, for example, two, three or more, etc., unless explicitly specified and limited.

[0029] Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the present application.

[0030] To solve the problems in the prior art, the embodiments of the present application provide a four-degree-of-freedom laser scanning device.

[0031] As Figure 1 and Figure 2As shown in the figure, a four-degree-of-freedom laser scanning device includes a laser 1 and a laser direction changing device 2; the laser 1 and the laser direction changing device 2 are arranged adjacent to each other; the laser direction changing device 2 is used for changing the direction of the laser emitted by the laser 1 to perform scanning in different directions, and the laser direction changing device 2 includes a laser light path adjusting assembly 21, a lens group 22, a first moving assembly 23 and a second moving assembly 24; the laser light path adjusting assembly 21 is used for guiding the laser emitted by the laser 1 into the lens group 22; the first moving assembly 23 is used for driving the lens group 22 to move in a vertical plane; and the second moving assembly 24 is used for driving the lens group 22 to move to change the orientation of the exit port of the lens group 22, such as changing the included angle between the orientation of the exit port of the lens group 22 and the vertical plane.

[0032] The four-degree-of-freedom laser scanning device of the utility model, based on with laser direction changing device 2 to the laser that laser 1 output changes direction, realize the laser that outputs can be oriented to multiple directions, wherein, with first moving assembly 23 and second moving assembly 24 drive lens group 22 moves, and then change the position and orientation of lens group 22, with laser light path adjusting assembly 21 ensure that with lens group 22 moves always guide the laser that laser 1 output into lens group 22, and then realize multi-directional scanning based on with laser direction changing device to the laser that laser output changes direction, realize the laser that outputs can be oriented to multiple directions, with laser 1 and laser direction changing device 2 are arranged adjacent, then can replace different specifications of laser;By improving the movement space of the light beam of the laser 1, it can be scanned in a wider angle and range, which will significantly improve the applicability and flexibility in practical applications such as material processing, welding and surface treatment.

[0033] In some preferred embodiments, as shown in Figure 2 and Figure 3 As shown in the figure, the laser light path adjusting assembly 21 includes a first direction changing assembly 211, a second direction changing assembly 212 and a third direction changing assembly 213; the first direction changing assembly 211 is used for guiding the laser emitted by the laser 1 into the second direction changing assembly 212; the second direction changing assembly 212 is installed on the moving end of the first moving assembly 23 and is used for guiding the laser output by the first direction changing assembly 211 to the third direction changing assembly 213; the third direction changing assembly 213 is installed on the second moving assembly 24 and is used for guiding the laser output by the second direction changing assembly 212 to the lens group 22; preferably, the first direction changing assembly 211, the second direction changing assembly 212 and the third direction changing assembly 213 can all be mirrors; based on setting the second direction changing assembly 212 to move with the first moving assembly 23 and setting the third direction changing assembly 213 to move with the second moving assembly 24, the laser output by the laser 1 is ensured to enter the lens group 22 with the change of the position of the lens group 22, and the structure is simple and the assembly is convenient.

[0034] In some preferred embodiments, as shown in Figure 2 and Figure 3 The first moving assembly 23 comprises a horizontal moving part 231 and a vertical moving part 232; the moving end of the horizontal moving part 231 is connected to the vertical moving part 232; the vertical moving part 232 is provided with the second direction-changing assembly 212 at one end in the vertical direction, and the second moving assembly 24 is provided at the moving end, i.e., the second direction-changing assembly 212 and the second moving assembly 24 are in a fixed horizontal position, thereby ensuring that the laser light reflected by the second direction-changing assembly 212 enters the third direction-changing assembly 213; in particular, the light direction of the second direction-changing assembly 212 can be arranged in the vertical direction.

[0035] Preferably, the horizontal moving part 231 and the vertical moving part 232 are both linear guide mechanisms, such as linear guide mechanisms driven by servo motors, thereby ensuring more accurate control of the position of the lens group 22 during movement.

[0036] In some preferred embodiments, as shown in Figure 4 and Figure 5 The second moving assembly 24 comprises a first mounting frame 241, a first rotating driving part 242, a second mounting frame 243, a second rotating driving part 244 and a third mounting frame 245; the first mounting frame 241 is mounted on the moving end of the first moving assembly 23; the first rotating driving part 242 is used to drive the second mounting frame 243 to rotate in a first direction, such as rotation around the Z axis; the third mirror 2131 of the third direction-changing assembly 213 is mounted on the second mounting frame 243; the rotation axis of the third mirror 2131 is collinear with the incident light of the third mirror 2131, thereby ensuring normal incidence of the incident light of the third mirror 2131 when the first rotating driving part 242 rotates, and further changing the direction of the light emitted by the lens group 22; the second rotating driving part 244 is mounted on the second mounting frame 243 and is used to drive the third mounting frame 245 to rotate in a second direction, such as rotation around the X axis; the fourth mirror 2132 of the third direction-changing assembly 213 and the lens group 22 are mounted on the third mounting frame 245; the rotation axis of the fourth mirror 2132 is collinear with the incident light of the fourth mirror 2132, thereby ensuring that the direction of the light emitted by the third mirror 2131 entering the fourth mirror 2132 does not change when the second rotating driving part 244 operates, while the orientation of the emitted light changes; the lens group 22 is arranged on the light path of the fourth mirror 2132.

[0037] In some preferred embodiments, the first rotating driving part 242 comprises a first motor 2421, a first gear set 2422 and a first rotating shaft 2423; the first motor 2421 drives the first rotating shaft 2423 to rotate through the first gear set 2422; one end of the first rotating shaft 2423 is connected to the first gear set 2422, and the other end passes through the first mounting frame 241 and is connected to the second mounting frame 243.

[0038] Preferably, the gear connected with the first rotating shaft 2423 is a stepped gear, which is rotationally connected with the second mounting frame 243; thereby, the stress of the first rotating shaft 2423 is reduced, and the service life is improved.

[0039] In some preferred embodiments, the second rotating driving member 244 comprises a second motor 2441, a second gear set 2442 and a second rotating shaft 2443; the second motor 2441 drives the second rotating shaft 2443 to rotate through the second gear set 2442; one end of the second rotating shaft 2443 is connected with the second gear set 2442, and the other end penetrates through the second mounting frame 243 and is connected with the third mounting frame 245.

[0040] Preferably, the gear connected with the second rotating shaft 2443 is a stepped gear, which is rotationally connected with the third mounting frame 245; thereby, the stress of the second rotating shaft 2443 is reduced, and the service life is improved.

[0041] In some preferred embodiments, the first mounting frame 241 has an accommodation space for accommodating the second mounting frame 243 inside; the second mounting frame 243 has an accommodation space for accommodating the third mounting frame 245 inside; thereby, the size of the device is reduced, and the space utilization is improved.

[0042] In some preferred embodiments, the first direction-changing assembly 211 comprises at least one first reflecting mirror 2111, and the specific number is determined according to the working condition.

[0043] In some preferred embodiments, the second direction-changing assembly 212 comprises at least one second reflecting mirror 2121; and the specific number is determined according to the working condition.

[0044] In some preferred embodiments, as shown in Figure 6 and Figure 7 The lens set 22 comprises a shell 221, a first lens 222 and a second lens 223; the shell 221 is a cylinder with two open sides; the first lens 222 and the second lens 223 are arranged in parallel and coaxially in the shell 221, and the first lens 222 and / or the second lens 223 can be moved to change the distance between the first lens 222 and the second lens 223; thereby, the size of the output light spot can be changed to adapt to different working condition requirements.

[0045] Preferably, a sliding groove is arranged on the shell 221, and the first lens 222 and / or the second lens 223 are connected to the sliding groove through bolts to move along the extension direction of the sliding groove; at this time, the sliding groove is arranged along the light propagation direction to realize the position-adjustable or position-fixed of the first lens 222 and / or the second lens 223 by screwing the bolts.

[0046] The embodiments of the present application are described above with reference to the drawings; however, the present application is not limited to the specific embodiments described above, but the specific embodiments described above are merely illustrative rather than restrictive, and a person of ordinary skill in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, and all of them belong to the protection of the present application.

Claims

1. A four degree of freedom laser scanning device, characterized by, The laser and the laser direction changing device are arranged adjacently. The laser direction changing device is used for changing the direction of the laser emitted by the laser to perform scanning in different directions. The laser light path adjusting assembly is used for guiding the laser emitted by the laser into the lens group. The first moving assembly is used for moving the lens group in a vertical plane. The second moving assembly is used for moving the lens group to change the orientation of the exit port of the lens group. The laser light path adjusting assembly comprises a first direction changing assembly, a second direction changing assembly and a third direction changing assembly.

2. The four-degree-of-freedom laser scanning device of claim 1, wherein, The first direction changing assembly is used for guiding the laser emitted by the laser into the second direction changing assembly. The second direction changing assembly is installed on the moving end of the first moving assembly and is used for guiding the laser output by the first direction changing assembly to the third direction changing assembly. The third direction changing assembly is installed on the second moving assembly and is used for guiding the laser output by the second direction changing assembly to the lens group. The first moving assembly comprises a horizontal moving part and a vertical moving part.

3. The four-degree-of-freedom laser scanning device of claim 2, wherein, The moving end of the horizontal moving part is connected to the vertical moving part. One end of the vertical moving part in the vertical direction is provided with the second direction changing assembly, and the moving end of the vertical moving part is provided with the second moving assembly. Both the horizontal moving part and the vertical moving part are linear guide rail mechanisms.

4. The four-degree-of-freedom laser scanning device of claim 3, wherein, The second moving assembly comprises a first mounting frame, a first rotation driving part, a second mounting frame, a second rotation driving part and a third mounting frame.

5. The four-degree-of-freedom laser scanning device of claim 2, wherein, The first mounting frame is installed on the moving end of the first moving assembly. The first rotation driving part is used for driving the second mounting frame to rotate in a first direction. The third mirror of the third direction changing assembly is installed on the second mounting frame. The rotation axis of the third mirror is collinear with the incident light of the third mirror. The second rotation driving part is installed on the second mounting frame and is used for driving the third mounting frame to rotate in a second direction. The fourth mirror of the third direction changing assembly and the lens group are installed on the third mounting frame. The rotation axis of the fourth mirror is collinear with the incident light of the fourth mirror. The lens group is arranged on the exit light path of the fourth mirror. The first rotation driving part comprises a first motor, a first gear set and a first rotation shaft.

6. The four-degree-of-freedom laser scanning device of claim 5, wherein, The first motor drives the first rotation shaft to rotate through the first gear set. One end of the first rotation shaft is connected to the first gear set, and the other end of the first rotation shaft passes through the first mounting frame and is connected to the second mounting frame. The second rotation driving part comprises a second motor, a second gear set and a second rotation shaft.

7. The four-degree-of-freedom laser scanning device of claim 5, wherein, The second motor drives the second rotation shaft to rotate through the second gear set. One end of the second rotation shaft is connected to the second gear set, and the other end of the second rotation shaft passes through the second mounting frame and is connected to the third mounting frame.

8. The four-degree-of-freedom laser scanning device according to claim 5, wherein The first mounting frame has a containing space containing the second mounting frame. ​ The second mounting frame has a containing space inside for containing the third mounting frame.

9. The four-degree-of-freedom laser scanning device of claim 2, wherein, The first redirecting assembly includes at least one first mirror.

10. The four-degree-of-freedom laser scanning device of claim 1, wherein, The lens group includes a housing, a first lens and a second lens; The housing is a cylinder with two open sides; The first lens and the second lens are arranged in parallel and coaxially inside the housing, and the first lens and / or the second lens is movable to change the distance between the first lens and the second lens.

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