CN212846142U

CN212846142U - Laser scanning device

Info

Publication number: CN212846142U
Application number: CN202022106543.5U
Authority: CN
Inventors: 谢斌斌; 郭颖; 潘康炎; 费小云; 沈琳峰; 侯利; 冯遇春; 朱志伟
Original assignee: Zhongke Yuanguang Jiaxing Laser Technology Co ltd
Current assignee: Zhongke Yuanguang Jiaxing Laser Technology Co ltd
Priority date: 2020-09-23
Filing date: 2020-09-23
Publication date: 2021-03-30
Anticipated expiration: 2030-09-23

Abstract

The utility model relates to a laser scanning technical field just discloses a laser scanning device, which comprises a motor, the motor adapter has been cup jointed at the top of motor, the middle part fixed mounting at motor adapter top has the arch, and the top activity joint of motor adapter has the silica gel pad, the top fixed mounting of motor adapter has the four-sided mirror, the middle part packing of silica gel pad has epoxy glue. This laser scanning device, through being provided with the motor, the purpose that production simple process and low cost are reached to four-sided mirror and ground adapter etc, this kind of laser scanning device, greatly reduced the processing technology requirement to four-sided mirror, the prism can adopt the technology of moulding plastics production, compare the machining and the optical machining method that prior art adopted, manufacturing cost is reduced, be fit for mass production, through carrying out simple adjustment back to this kind of laser scanning device, can reach within 1 milliradian with the depth of parallelism or the directional precision of laser after four-sided mirror four face reflection.

Description

Laser scanning device

Technical Field

The utility model relates to a laser scanning technical field specifically is a laser scanning device.

Background

Because the four-surface mirror has the advantages of high scanning frequency, compact structure, small vibration, few rotating parts and the like, the four-surface mirror is widely adopted as a laser scanning mode, for example patent nos. CN201811427555 and CN201711043161 both use a tetrahedral mirror as the scanning mechanism, wherein, the patent number CN201811427555 arranges the laser emitting component and the laser receiving component at two sides of the four-sided mirror, which has the advantages that a plurality of laser paths can be arranged, the structure is very compact, but the requirements on the surface shape precision and the position precision of the four surfaces of the four-surface mirror are extremely high, in addition, the assembly precision of the four surfaces and the motor shaft is very high, and mass production is difficult to form, and patent No. CN201711043161 designs the four surfaces of the four-surface mirror to have a certain inclination angle, so that theoretically, scanning lines 4 times of the number of the transmitting and receiving optical paths can be realized, however, the machining precision and the installation precision of the components of the four-surface mirror can cause that production cannot be realized, and the actual angle is not necessarily the designed angle.

SUMMERY OF THE UTILITY MODEL

The laser scanning device is not enough to the prior art, the utility model provides a low and simple with production technology's advantage possesses, has solved the problem that above-mentioned technical background proposed.

The utility model provides a following technical scheme: the utility model provides a laser scanning device, includes the motor, the motor adapter has been cup jointed at the top of motor, the middle part fixed mounting at motor adapter top has the arch, and the top activity joint of motor adapter has the silica gel pad, the top fixed mounting of motor adapter has the four-sided mirror, the middle part packing of silica gel pad has the epoxy to glue, the internal thread of four-sided mirror is connected with three fastening bolt.

Carefully, the silica gel pad is by three little rings and a big ring integrated into one piece, three the equal angular distribution of little ring is in the upper end of big ring, the periphery at motor adapter top has seted up the draw-in groove, the structure of draw-in groove is unanimous with the structure of silica gel pad.

The silicon cushion is characterized in that a hollow circular truncated cone is fixedly mounted at the upper end of the middle part in the four-surface mirror, the top and the bottom of the circular truncated cone penetrate through the silicon cushion, and the bottom of the circular truncated cone corresponds to the inner part of the top of the silicon cushion and is an epoxy glue area.

Carefully, protruding for milling flat structure, three hole has been seted up to the inside periphery of four-face mirror and has run through four-face mirror, silica gel pad and threaded connection in the inside of motor adapter in proper order, and is three fastening bolt is threaded connection in proper order in three hole.

Compared with the prior art, the utility model discloses possess following beneficial effect:

1. this laser scanning device, through being provided with the motor, the purpose that production technology is simple and with low costs is reached to four-sided mirror and ground adapter etc, this kind of laser scanning device, greatly reduced the processing technology requirement to four-sided mirror, the prism can adopt the technology of moulding plastics production, compare the machining and the optical machining method that prior art adopted, the production cost is reduced, be fit for mass production, through carrying out simple adjustment to this kind of laser scanning device, can reach within 1 milliradian with the depth of parallelism or the directional precision of laser after four-sided mirror four face reflection, even in mass production, also can reach the uniformity of very high precision and every product, the step of adjustment is also very simple and convenient in addition.

Drawings

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a schematic cross-sectional view of the whole structure of the present invention;

FIG. 3 is a schematic view of the structure and appearance of the present invention;

FIG. 4 is a schematic top view of the structure of the present invention;

FIG. 5 is a schematic view of the motor adapter, the protrusion and the silicone pad of the present invention;

FIG. 6 is a schematic view of the first part of the structure of the present invention;

fig. 7 is a schematic view of the second part of the structure of the present invention.

In the figure: 1. a motor; 2. a motor adapter; 3. a protrusion; 4. a silica gel pad; 5. a four-face mirror; 6. epoxy glue; 7. and fastening the bolt.

Detailed Description

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

Referring to fig. 1-7, a laser scanning device includes a motor 1, a motor adapter 2 is sleeved on the top of the motor 1, a protrusion 3 is fixedly mounted in the middle of the top of the motor adapter 2, a silica gel pad 4 is movably clamped on the top of the motor adapter 2, a four-mirror 5 is fixedly mounted on the top of the motor adapter 2, epoxy glue 6 is filled in the middle of the silica gel pad 4, and three fastening bolts 7 are connected to the internal threads of the four-mirror 5.

Wherein, the silica gel pad 4 is formed by three small rings and a big ring in an integrated way, the three small rings are distributed at the upper end of the big ring at equal angles, the periphery of the top of the motor adapter 2 is provided with a clamping groove, the structure of the clamping groove is consistent with that of the silica gel pad 4, a fastening bolt 7 can be accommodated and passed through an inner hole of the ring, the ratio of the difference between the outer diameter and the inner diameter of the ring to the height of the ring is less than or equal to 1, the mechanical property of the ring is similar to that of a spring, so that the height of the ring can be changed by applying pressure on the ring through a screw, the connection thickness between the rings is slightly thinner, the function of connecting the three rings is mainly played, the connection is thinner, the three rings can not touch the four-sided mirror 5, three holes on the silica gel pad 4 are aligned with three holes on the motor adapter 2, the four-sided mirror 5 is formed by plastic injection molding and is placed on the silica gel pad 4, the hole at the center is coaxially positioned with, the four-surface mirror 5 is provided with a through hole corresponding to the size and the position of the silica gel pad 4, and the three fastening bolts 7 are screwed on the motor adapter 2 through the through hole on the four-surface mirror and the through hole on the silica gel pad 4.

Wherein, the upper end fixed mounting at the inside middle part of four-side mirror 5 has hollow round platform, the top and the bottom of round platform all run through, and the bottom of round platform and the inside of 4 tops of silica gel pad are corresponding for epoxy 6 regions, because the height of 4 rings of silica gel pad far away big and the recess on the motor adapter 2, consequently can form the cavity between four-side mirror 5 and the motor adapter 2, be equipped with on the motor adapter 2 and mill flat arch 3, when making things convenient for the coaxial positioning of four-side mirror 5 and motor adapter 2, can make glue pour into the cavity between four-side mirror 5 and the motor adapter 2.

Wherein, the bulge 3 is a milling flat structure, the periphery of the inner part of the four-surface mirror 5 is provided with three holes which sequentially penetrate through the four-surface mirror 5 and the silica gel pad 4 and are in threaded connection with the inner part of the motor adapter 2, three fastening bolts 7 are sequentially in threaded connection with the three holes, the tightening and loosening of the fastening bolts 7 can adjust the horizontal position relation between the mounting surface of the four-surface mirror 5 and the motor 1 because the silica gel pad 4 has elasticity, three fastening bolts 7 are arranged on the periphery of the four-surface mirror 5 and are matched with a collimator system to adjust the three fastening bolts 7 on the four-surface mirror 5, the emergent light of the laser reflected by the four surfaces of the four-surface mirror 5 can be adjusted to be parallel to each other or a preset angle relation, and simultaneously the flatness error or the angle value of the emergent light can be measured, the parallelism between the four surfaces of the four-surface mirror 5, after the adjustment is finished, epoxy glue can be injected into the channel above the four-surface mirror 5, and a cavity between the four-surface mirror 5 and the motor adapter 2 is filled up, so that the four-surface mirror 5 and the motor adapter 2 are fixedly connected into a whole through the epoxy glue, and the reliability of the structure is improved.

The working principle is as follows: because the height of the circular ring of the silica gel pad 4 is far greater than that of the groove on the motor adapter 2, a cavity can be formed between the four-surface mirror 5 and the motor adapter 2, and the motor adapter 2 is provided with the milling flat bulge 3, so that the glue can be injected into the cavity between the four-surface mirror 5 and the motor adapter 2 while the four-surface mirror 5 and the motor adapter 2 are coaxially positioned; because the silica gel pad 4 has elasticity, the distance between the four-side mirror 5 and the motor adapter 2 can be shortened or increased by screwing and unscrewing the fastening bolt 7, so that the space relation between the side surface of the four-side mirror 5 and the motor 1 can be adjusted, the fastening bolt 7 is screwed down, the side surface is raised by unscrewing the fastening bolt 7, and because the axis of the four-side mirror 5 is parallel to the side surface, the fastening bolt 7 is screwed down, and the upper half part of the axis of the four-side mirror 5 is inclined and close to the side of the fastening bolt 7; loosening the fastening bolt 7, and separating the upper half part of the axis of the four-side mirror 5 from the fastening bolt 7 under the action of the silica gel pad 4; the horizontal height of the four-surface mirror 5 on the motor adapter 2 can be adjusted through the three fastening bolts 7, so that the axis of the four-surface mirror 5 is parallel to the rotation axis of the motor 1; the tool required for adjustment is a collimator system, the collimator system consists of a long-focus convex lens, target paper with scales and a camera, the target paper with the scales falls on the focus of the long-focus convex lens, and the camera can observe and calculate the distance of a light spot on the target paper with the scales, so that the target paper is necessarily coincident on the target paper after being refracted by the long-focus convex lens as long as the parallel light is parallel light according to the convex lens principle; according to the principle, the four-surface mirror 5 structure to be adjusted is placed on the left side of the long-focus convex lens, a visible laser is used for emitting a laser beam, and after the laser beam is refracted by the long-focus convex lens, light spots fall on target paper with scales; the fastening bolt is adjusted to change the incident angle of the laser on the four-surface mirror, so that the incident angle of the laser reflected by the laser entering the long-focus convex lens is adjusted, the position of a laser spot on the target paper with the scales is adjusted, according to the principle of a collimator, if the laser is reflected by four surfaces of the four-surface mirror 5 and then falls on the same point on the target paper with the scales, the light reflected by the four surfaces of the four-surface mirror 5 is parallel, and then the incident angles of the laser on four doors of the four-surface mirror 5 are the same, so that the four surfaces of the four-surface mirror 5 are inferred to be parallel to the motor rotating shaft, and further the axis of the four-surface mirror 5 is indicated to be parallel to the motor rotating shaft; on the other hand, through a collimator system and target paper with scales, the parallelism of emergent light reflected by four surfaces of a laser through a four-surface mirror can be calculated, the distance dx between two light spots is calculated according to the positions of the camera shown in the figure through pixel points, the resolution of dx can reach 0.5mm, if a long-focus convex lens with the focal length L being 2m is selected, the minimum resolution of the collimator is dx/L being 0.25 milliradian, and therefore the debugging of the method is easy to control the angle difference of the emergent light within 1 milliradian and even higher; in addition, if every face of four-face mirror 5 is preset by the angle rather than the axis, through this kind of adjustment mode also can make laser pass through the emergent light of four face mirror 5 four face reflection and distribute according to presetting the angle, and can measure the angle of emergent light accurately, thereby be arranged in the correction of laser scanning system angle, so that laser scanning mechanism reaches higher precision, after the adjustment finishes, through the passageway of four-face mirror 5 top, can pour into epoxy glue, fill up the cavity between four-face mirror 5 and motor adapter 2, make four-face mirror 5 and motor adapter 2 link firmly integratively through epoxy glue, improve the reliability of structure.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and for simplicity of description, and do not indicate or imply that the equipment or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In addition, in the drawings of the present invention, the filling pattern is only for distinguishing the pattern layer, and is not limited to any other pattern.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A laser scanning device comprising a motor (1), characterized in that: the top of motor (1) has cup jointed motor adapter (2), the middle part fixed mounting at motor adapter (2) top has protruding (3), and the top activity joint of motor adapter (2) has silica gel pad (4), the top fixed mounting of motor adapter (2) has four-face mirror (5), the middle part packing of silica gel pad (4) has epoxy glue (6), the inside threaded connection of four-face mirror (5) has three fastening bolt (7).

2. A laser scanning device according to claim 1, characterized in that: the silica gel pad (4) is formed by integrally forming three small circular rings and a large circular ring, the three small circular rings are distributed at the upper end of the large circular ring at equal angles, a clamping groove is formed in the periphery of the top of the motor adapter (2), and the structure of the clamping groove is consistent with that of the silica gel pad (4).

3. A laser scanning device according to claim 1, characterized in that: the upper end of the middle part in the four-surface mirror (5) is fixedly provided with a hollow round table, the top and the bottom of the round table are both penetrated, and the bottom of the round table and the inside of the top of the silica gel pad (4) correspond to each other and are provided with an epoxy adhesive (6) area.

4. A laser scanning device according to claim 1, characterized in that: protruding (3) are for milling flat structure, the inside periphery of four-face mirror (5) has been seted up three hole and has been run through four-face mirror (5), silica gel pad (4) and threaded connection in proper order in the inside of motor adapter (2), and is three fastening bolt (7) threaded connection in proper order is in three hole.