Rotating prism assembly

Abstract

The utility model provides a rotating prism assembly which comprises a prism, a rotating mechanism and a base. The prism comprises a plurality of reflecting mirror surfaces, and the reflecting mirror surfaces are uniformly distributed around an axis; the prism is provided with a circular hole extending along the axis. The rotating mechanism comprises a rotating shaft and a rotating wheel fixed on the rotating shaft; the rotating shaft is rotatably mounted on the base; the rotating wheel is mounted in the circular hole of the prism, and the peripheral wall of the rotating wheel is bonded and fixed with the hole wall of the circular hole; a plurality of glue grooves are formed in the outer side of the peripheral wall of the rotating wheel; a positioning concave part is arranged at the lower end of the round hole; the positioning concave part comprises a side wall and a bottom wall which are perpendicular to each other, and the lower end of the rotating wheel is flush with the bottom wall of the positioning concave part. According to the technical scheme, the polyhedral prism is loaded on the annular peripheral wall of the rotating wheel, and the positioning concave part is arranged at the lower end of the circular hole of the prism, so that a positioning reference is provided for mounting of the rotating wheel, assembly errors are reduced, and mounting precision and stability of the prism are improved; the technical scheme is simple in installation and operation, easy to implement and high in production efficiency.

Description

Technical Field

[0001] The utility model relates to the field of optoelectronic accessories, in particular to a rotating prism assembly. Background Art

[0002] Laser radar is a radar system that emits laser beams to detect the position, speed and other characteristic quantities of a target. A polygonal prism that can rotate around the center is set in the direction of the laser emission, and the laser scanning is achieved by rotating the prism and reflecting the light through a motor.

[0003] Some rotating prisms form multiple reflective surfaces by separately mounting reflectors on multiple mounting parts of a bracket, such as the prism, prism assembly and radar system disclosed in Chinese utility model patent CN218332129U; however, the multiple reflectors are assembled separately, which is more prone to assembly errors such as inconsistent angles and different distances from each reflective surface to the center point, affecting the detection accuracy of the laser radar; and the assembly process is cumbersome, affecting production efficiency. Utility Model Content

[0004] The utility model aims to provide a rotating prism assembly, comprising a prism, a rotating mechanism and a base; the prism comprises an upper end face, a lower end face and a plurality of reflecting mirror surfaces connecting the upper end face and the lower end face; the reflecting mirror surfaces are evenly distributed around an axis; the prism is provided with a circular hole extending along the axis and penetrating the upper end face and the lower end face of the prism; the rotating mechanism comprises a rotating shaft and a rotating wheel fixed on the rotating shaft; the rotating shaft is rotatably mounted on the base; the rotating wheel comprises an annular peripheral wall and a top wall connected to the upper end of the peripheral wall; the rotating wheel is installed in the circular hole of the prism, and its peripheral wall is bonded and fixed to the hole wall of the circular hole; a plurality of adhesive grooves are provided on the outer side of the peripheral wall; a positioning recess is provided at the lower end of the circular hole; the positioning recess comprises a side wall and a bottom wall perpendicular to each other, the bottom wall connects the side wall and the hole wall of the circular hole, and the lower end of the rotating wheel is flush with the bottom wall of the positioning recess; the rotating shaft, the rotating wheel and the prism are coaxially arranged.

[0005] The technical solution adopts a multi-faceted prism mounted on the annular circumferential wall of the rotating wheel as the main body for reflecting the laser. A positioning recess is provided at the lower end of the circular hole of the prism. During gluing and installation, the positioning recess can be used to cooperate with the fixture platform for positioning, thereby providing a positioning reference for the installation of the rotating wheel, reducing assembly errors, and improving the installation accuracy and stability of the prism. In addition, the installation operation of the technical solution is simple and easy to implement, and the production efficiency is high.

[0006] In addition, the glue groove set on the rotating wheel contains the glue, which can increase the contact area between the glue and the rotating wheel and improve the stability of bonding; at the same time, when the rotating wheel and the prism are bonded, excess glue can flow to the glue groove, reducing the situation where the glue seeps out and contaminates the surface of the prism. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 and Figure 2 It is a schematic diagram of the structure of the utility model at different angles.

[0008] Figure 3 It is a cross-sectional view of the utility model.

[0009] Figure 4 and Figure 5 It is a structural exploded view of the utility model at different angles.

[0010] Figure 6 The utility model is a schematic diagram of the prism and the rotating wheel being glued and installed. DETAILED DESCRIPTION

[0011] The present application scheme is further described as follows in conjunction with the accompanying drawings:

[0012] See attached Figure 1-6 A rotating prism 1 assembly includes a prism 1, a rotating mechanism, a base 5, and a driving mechanism for driving the rotating mechanism to rotate relative to the base 5.

[0013] The prism 1 includes an upper end face 11, a lower end face 12 and a plurality of reflective mirror faces 13 connecting the upper end face 11 and the lower end face 12; the reflective mirror faces 13 are evenly distributed around an axis L; the prism 1 is provided with a circular hole 14 extending along the axis and penetrating the upper end face 11 and the lower end face 12 of the prism 1; the rotating mechanism includes a rotating shaft 4 and a rotating wheel 3 fixed on the rotating shaft 4; the rotating shaft 4 is rotatably mounted on the base 5; the rotating wheel 3 includes an annular peripheral wall 31 and a top wall 32 connected to the upper end of the peripheral wall 31; the rotating wheel 3 is installed in the circular hole 14 of the prism 1, and its peripheral wall 31 is bonded and fixed to the hole wall of the circular hole 14; the outer side of the peripheral wall 31 is provided with a plurality of glue grooves 33. A positioning recess 15 is provided at the lower end of the circular hole 14; the positioning recess 15 includes a side wall 151 and a bottom wall 152 which are perpendicular to each other, the bottom wall 152 connects the side wall 151 and the hole wall of the circular hole 14, and the lower end of the rotating wheel 3 is flush with the bottom wall 152 of the positioning recess 15. The rotating shaft 4, the rotating wheel 3 and the prism 1 are coaxially arranged.

[0014] In this embodiment, the prism has five reflective mirror surfaces, that is, a pentaprism. Each reflective mirror surface 13 is coated with a reflective film layer.

[0015] The present technical solution adopts a multi-faceted prism 1 mounted on the annular peripheral wall 31 of the rotating wheel 3 as the main body for reflecting the laser. The lower end of the circular hole 14 of the prism 1 is provided with a positioning recess 15. During the gluing installation, the positioning recess 15 can be used to cooperate with the fixture platform 100 for positioning, thereby providing a positioning reference for the installation of the rotating wheel 3. Figure 6 As shown, the assembly error is reduced and the installation accuracy and stability of the prism 1 are improved; and the installation operation of this technical solution is simple and easy to implement, and the production efficiency is high.

[0016] In addition, the glue groove 33 provided on the rotating wheel 3 contains the glue liquid, which can increase the contact area between the glue liquid and the rotating wheel 3 and improve the stability of the bonding; at the same time, when the rotating wheel 3 is attached to the prism 1, the excess glue liquid can flow to the glue groove 33, thereby reducing the situation where the glue liquid seeps out and pollutes the surface of the prism 1.

[0017] The glue grooves 33 are evenly spaced around the axis of the rotating wheel 3 and extend along the axial direction; the cross section of each glue groove 33 is arc-shaped, which facilitates the flow and distribution of the glue liquid and forms a uniform adhesive force.

[0018] The upper end of the rotating shaft 4 is provided with a connector 41, the top wall 32 of the rotating wheel 3 is provided with a boss 34, and the boss 34 is provided with a center hole for the rotating shaft 4 to pass through; the connector and the boss 34 are connected and fixed by a plurality of connecting screws, and the connector 41 and the boss 34 are provided with connecting holes 42 for the connecting screws to pass through. The rotating mechanism adopts a split rotating wheel 3 and a rotating shaft 4, which is easy to process, and is easy to install by connecting with connecting screws.

[0019] The bottom of the rotating shaft 4 is provided with a screw hole for connecting with a limiting member to prevent the rotating shaft 4 from being separated from the base 5 .

[0020] The base 5 is provided with an axial hole 51 , and the rotating shaft 4 is inserted into the axial hole 51 and rotatably cooperates therewith; bearings 6 are installed at the upper and lower ends of the axial hole 51 .

[0021] The driving mechanism includes a mover 7 and a rotor 8; the mover 7 is fixed on the base 5, and the rotor 8 is fixed on the inner side of the peripheral wall 31 of the rotating wheel 3. Specifically, the mover 7 is a conductive core, and the rotor 8 is a permanent magnet.

[0022] A base 52 is provided at the bottom of the base 5 . A plurality of fixing legs 53 extend downward from the base 52 . The fixing legs 53 are provided with mounting holes 531 .

[0023] An encoder 9 is mounted on the base 52 .

[0024] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. A rotating prism assembly, comprising a prism, a rotating mechanism and a base; characterized in that: The prism comprises an upper end face, a lower end face and a plurality of reflective mirror faces connecting the upper end face and the lower end face; the reflective mirror faces are evenly distributed around an axis; the prism is provided with a circular hole extending along the axis and penetrating the upper end face and the lower end face of the prism; The rotating mechanism comprises a rotating shaft and a rotating wheel fixed on the rotating shaft; The rotating shaft is rotatably mounted on the base; The rotating wheel comprises an annular peripheral wall and a top wall connected to the upper end of the peripheral wall; the rotating wheel is installed in the circular hole of the prism, and its peripheral wall is bonded and fixed to the hole wall of the circular hole; a plurality of adhesive grooves are provided on the outer side of the peripheral wall; A positioning recess is provided at the lower end of the circular hole; the positioning recess comprises a side wall and a bottom wall which are perpendicular to each other, the bottom wall connects the side wall and the hole wall of the circular hole, and the lower end of the rotating wheel is flush with the bottom wall of the positioning recess; The rotating shaft, the rotating wheel and the prism are coaxially arranged.

2. The rotating prism assembly according to claim 1, characterized in that: The rubber grooves are evenly spaced around the axis of the rotating wheel and extend in the axial direction; The cross section of each glue groove is arc-shaped.

3. The rotating prism assembly according to claim 1, characterized in that: The upper end of the rotating shaft is provided with a connector, and the top wall of the rotating wheel is provided with a boss. The connecting head and the boss are connected and fixed by connecting screws; The connecting head and the boss are provided with connecting holes for the connecting screws to pass through.

4. The rotating prism assembly according to claim 3, characterized in that: The base is provided with an axial hole, and the rotating shaft is inserted into the axial hole and rotatably cooperates with the axial hole; Bearings are installed at the upper and lower ends of the shaft hole.

5. The rotating prism assembly according to claim 4, characterized in that: It also includes a driving mechanism for driving the rotating mechanism to rotate relative to the base; the driving mechanism includes a mover and a rotor; The mover is fixed on a base, and the rotor is fixed on the inner side of the peripheral wall of the runner.

6. The rotating prism assembly according to claim 5, characterized in that: A base is provided at the bottom of the base, and a plurality of fixed legs extend downward from the base.

7. The rotating prism assembly according to claim 6, characterized in that: An encoder is mounted on the base.

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