Prism scanning device for laser radar

Abstract

The utility model provides a prism scanning device for a laser radar, which comprises a scanning assembly, the scanning assembly comprises a main shaft and a main frame, the main shaft is rotatable, the main frame is provided with a first vertical plate part and a second vertical plate part, two ends of the main shaft are rotatably connected with the first vertical plate part and the second vertical plate part respectively, and a tower mirror is sleeved between the first vertical plate part and the second vertical plate part on the main shaft. And the tower mirror is provided with a plurality of reflecting surfaces along the circumferential direction of the main shaft, so that the problem that a traditional single-cantilever scanning device of the laser radar is easy to generate radial runout and axial movement is solved.

Description

Technical Field

[0001] The utility model relates to the field of laser radar, in particular to a prism scanning device for laser radar. Background Art

[0002] Linear LiDAR is a high-precision, non-contact measurement device widely used in industrial, medical, and scientific research fields. Currently, most commercially available line-scan LiDARs use a cantilever structure for scanning. While this structure is relatively simple to manufacture and install, it is prone to radial runout and axial movement, making it suitable only for measurements requiring low precision. For applications requiring higher precision, this cantilever structure is unlikely to meet the actual requirements for accuracy and stability. Utility Model Content

[0003] The utility model provides a prism scanning device for laser radar, which solves the problem that traditional single-cantilever scanning devices of laser radar are prone to radial runout and axial movement.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a prism scanning device for laser radar, including a scanning assembly, the scanning assembly includes a main shaft and a main frame, the main shaft is rotatable, the main frame is provided with a first vertical plate portion and a second vertical plate portion, the two ends of the main shaft are respectively rotatably connected to the first vertical plate portion and the second vertical plate portion, a tower mirror is provided between the first vertical plate portion and the second vertical plate portion on the main shaft, and the tower mirror has multiple reflecting surfaces along the circumference of the main shaft.

[0005] In the preferred solution, the first vertical plate portion is provided with a first bearing, the second vertical plate portion is provided with a second bearing, the two ends of the main shaft are respectively sleeved with the first bearing and the second bearing, the two ends of the main shaft are respectively provided with a first shaft shoulder portion and a second shaft shoulder portion, the first shaft shoulder portion rests on the end of the first bearing, the second shaft shoulder rests on the inner ring of the second bearing, and a corrugated spring is provided on the side of the second bearing on the second vertical plate portion away from the first bearing, and one end of the corrugated spring squeezes the outer ring of the second bearing.

[0006] In the preferred solution, the second vertical plate portion is provided with a groove space, the corrugated spring is arranged in the groove space, the open end of the groove space is provided with a pressure cover, the pressure cover abuts against the other end of the corrugated spring, the pressure cover is provided with a clamping screw, and the clamping screw is threadedly connected to the second vertical plate portion.

[0007] In the preferred solution, an end locking screw and a retaining ring are also provided. The inner ring of the second bearing is against the retaining ring on the side away from the first bearing. One end of the end locking screw is threadedly connected to the end of the main shaft and presses the retaining ring. The other end of the main shaft is provided with a first end locking nut that rests against the outer inner ring of the first bearing. The second vertical plate is also provided with an end cover that rests against the outer outer ring of the first bearing.

[0008] In the preferred solution, a tower mirror drive motor is also provided, which includes a motor stator and a motor rotor that are connected to each other. A motor seat is provided on the inner side of the second vertical plate, and the motor stator is connected to the motor seat. The tower mirror is provided with a flange, and the motor rotor is connected to the inner side of the flange.

[0009] In a preferred solution, an encoder is provided on the second vertical plate portion, and one end of the main shaft close to the tower mirror drive motor is sleeved with the encoder.

[0010] The beneficial effects of the utility model are as follows: the two ends of the main shaft are supported by the main frame, and the tower mirror is located between the two bearings, which reduces the cantilever swing and axial movement; the bearing clearance is adjusted by the corrugated spring to control the axial movement of the main shaft, while also reducing the vibration during movement and improving the accuracy and stability of the equipment; the motor and the tower mirror are coupled and linked to reduce the volume of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a three-dimensional schematic diagram of the present utility model.

[0013] Figure 2 It is a cross-sectional schematic diagram of the present utility model.

[0014] Figure 3 It is a partial structural sectional view of the utility model.

[0015] Figure 4 It is a sectional view of a tower mirror of the present utility model.

[0016] Figure 5 This is a structural diagram of a tower mirror of the present utility model.

[0017] In the figure: scanning assembly 1; main shaft 101; first bearing 102; second bearing 103; main frame 104; first end locking nut 105; end cover 106; motor seat 107; retaining ring 108; end locking screw 109; corrugated spring 110; pressure cover 111; tower mirror 112; second end locking nut 113; motor rotor 114; flange 115; motor stator 116; first vertical plate portion 117; second vertical plate portion 118; reflecting surface 119; first shaft shoulder portion 120; second shaft shoulder portion 121; tightening screw 122; sinking groove space 123; encoder 2. DETAILED DESCRIPTION

[0018] like Figure 1-5In the present invention, a prism scanning device for laser radar includes a scanning component 1, which includes a main shaft 101 and a main frame 104. The main shaft 101 is rotatable, and the main frame 104 is provided with a first vertical plate portion 117 and a second vertical plate portion 118. The two ends of the main shaft 101 are respectively rotatably connected to the first vertical plate portion 117 and the second vertical plate portion 118. A tower mirror 112 is provided between the first vertical plate portion 117 and the second vertical plate portion 118 on the main shaft 101. The tower mirror 112 has multiple reflecting surfaces 119 along the circumference of the main shaft 101.

[0019] The main frame 104 is a U-shaped structure, and the main shaft 101 is supported at both ends, which is more stable and prevents the occurrence of swinging similar to a cantilever structure.

[0020] A concave cavity is provided in the center of the tower mirror 112, and a positioning flange is provided in the middle of the main shaft 101. The bottom end of the concave cavity rests on the positioning flange, and a second end lock nut 113 is provided on the other side to be threadedly connected with the Forbidden City to fix and clamp the tower mirror 112.

[0021] In the preferred embodiment, the first vertical plate portion 117 is provided with a first bearing 102, and the second vertical plate portion 118 is provided with a second bearing 103. The two ends of the main shaft 101 are respectively sleeved with the first bearing 102 and the second bearing 103. The two ends of the main shaft 101 are respectively provided with a first shaft shoulder portion 120 and a second shaft shoulder portion 121. The first shaft shoulder portion 120 abuts against the end of the first bearing 102, and the second shaft shoulder portion 121 abuts against the inner ring of the second bearing 103. A corrugated spring 110 is provided on the side of the second vertical plate portion 118 of the second bearing 103 away from the first bearing 102, and one end of the corrugated spring 110 squeezes the outer ring of the second bearing 103.

[0022] In the preferred solution, the second vertical plate portion 118 is provided with a groove space 123, the corrugated spring 110 is arranged in the groove space 123, the open end of the groove space 123 is provided with a pressure cover 111, the pressure cover 111 is against the other end of the corrugated spring 110, the pressure cover 111 is provided with a clamping screw 122, and the clamping screw 122 is threadedly connected to the second vertical plate portion 118.

[0023] The rotating tower mirror 112 can adjust the distance between the inner end of the pressure cover 111 and the bottom of the sink space 123 to change the degree of compression of the corrugated spring 110, thereby changing the compression force on the outer ring of the second bearing 103 and adjusting the clearance of the second bearing 103.

[0024] In the preferred embodiment, an end locking screw 109 and a retaining ring 108 are also provided. The inner ring of the second bearing 103 is against the retaining ring 108 on the side away from the first bearing 102. One end of the end locking screw 109 is threadedly connected to the end of the main shaft 101 and presses the retaining ring 108. The other end of the main shaft 101 is provided with a first end locking nut 105 that rests against the outer inner ring of the first bearing 102. The second vertical plate portion 118 is also provided with an end cover 106 that rests against the outer outer ring of the first bearing 102.

[0025] In the preferred solution, a tower mirror drive motor is also provided, which includes a motor stator 116 and a motor rotor 114 that are socketed together. A motor seat 107 is provided on the inner side of the second vertical plate 118, and the motor stator 116 is socketed on the motor seat 107. The tower mirror 112 is provided with a flange 115, and the motor rotor 114 is socketed on the inner side of the flange 115.

[0026] In a preferred solution, an encoder 2 is provided on the second vertical plate portion 118 , and one end of the main shaft 101 close to the tower mirror driving motor is sleeved with the encoder 2 .

[0027] The flange 115 is fixedly connected to the tower mirror 112, and the tower mirror 112 is integrally sleeved with the main shaft 101 and rotates synchronously.

[0028] The motor drives the middle of the main shaft 101 so that the end is exposed for mounting the encoder 2 .

[0029] The spindle 101 is supported on the main frame 104 at both ends by a first bearing 102 and a second bearing 103. The inner ring of the first bearing 102 is restrained by a first end locking nut 105 and the shoulder of the spindle 101, while the outer ring of the first bearing 102 is restrained by an end cover 106 and a motor base 107. The inner ring of the second bearing 103 is restrained by the shoulder of the spindle 101 and a retaining ring 108. The retaining ring 108 is fixed to the spindle 101 by an end locking screw 109, thus limiting the position of the spindle 101.

[0030] Due to the clearance between the first bearing 102 and the second bearing 103, the main shaft 101 can move in the axial direction. A corrugated spring 110 is added to the right side of the outer ring of the second bearing 103. The force of the corrugated spring 110 can be controlled by the pressure cover 111 on the right side. The left side of the outer ring of the second bearing 103 is in a released state. Therefore, the corrugated spring 110 is pressed by the pressure cover 111 to eliminate the clearance between the first bearing 102 and the second bearing 103, thereby controlling the axial movement of the main shaft 101 and reducing the vibration during movement, thereby improving the accuracy and stability of the equipment.

[0031] The tower mirror 112 is fixed to the main shaft 101 through the shoulder of the main shaft 101 and the second end lock nut 113. The tower mirror 112 is between the first bearing 102 and the second bearing 103. The tower mirror 112 serves as the main moving structure. Through the support of the bearings at both ends, the radial swing of the tower mirror 112 is reduced, the stability of the structure is increased, and the accuracy of the equipment is improved.

[0032] The motor rotor 114 is coupled to the tower mirror 112 through a flange 115. The end surface of the tower mirror 112 has evenly distributed threaded holes for adjusting the dynamic balance of the motion mechanism.

[0033] The motor stator 116 is fixed on the motor base 107, the motor base 107 is fixed on the main frame 104, and the motor stator 116 and the motor rotor 114 are coupled inside the tower mirror 112, reducing the space of the equipment.

[0034] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The scope of protection of the present invention shall be the technical solutions set forth in the claims, including equivalent alternatives to the technical features of the technical solutions set forth in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A prism scanning device for laser radar, characterized by: The scanning assembly (1) includes a main shaft (101) and a main frame (104). The main shaft (101) is rotatable. The main frame (104) is provided with a first vertical plate portion (117) and a second vertical plate portion (118). Two ends of the main shaft (101) are rotatably connected to the first vertical plate portion (117) and the second vertical plate portion (118). A tower mirror (112) is sleeved between the first vertical plate portion (117) and the second vertical plate portion (118) on the main shaft (101). The tower mirror (112) has multiple reflecting surfaces (119) along the circumference of the main shaft (101).

2. The prism scanning device for laser radar according to claim 1, characterized in that: The first vertical plate portion (117) is provided with a first bearing (102), the second vertical plate portion (118) is provided with a second bearing (103), the two ends of the main shaft (101) are respectively sleeved with the first bearing (102) and the second bearing (103), the two ends of the main shaft (101) are respectively provided with a first shaft shoulder portion (120) and a second shaft shoulder portion (121), the first shaft shoulder portion (120) abuts against the end of the first bearing (102), the second shaft shoulder portion (121) abuts against the inner ring of the second bearing (103), and a corrugated spring (110) is provided on the side of the second bearing (103) on the second vertical plate portion (118) away from the first bearing (102), and one end of the corrugated spring (110) presses the outer ring of the second bearing (103).

3. The prism scanning device for laser radar according to claim 2, characterized in that: The second vertical plate portion (118) is provided with a sinking groove space (123), the corrugated spring (110) is provided in the sinking groove space (123), the open end of the sinking groove space (123) is provided with a pressure cover (111), the pressure cover (111) abuts against the other end of the corrugated spring (110), and the pressure cover (111) is provided with a clamping screw (122), and the clamping screw (122) is threadedly connected to the second vertical plate portion (118).

4. The prism scanning device for laser radar according to claim 2, characterized in that: An end locking screw (109) and a retaining ring (108) are also provided. The inner ring of the second bearing (103) is against the retaining ring (108) on the side away from the first bearing (102). One end of the end locking screw (109) is threadedly connected to the end of the main shaft (101) and presses the retaining ring (108). The other end of the main shaft (101) is provided with a first end locking nut (105) that is against the outer inner ring of the first bearing (102). The second vertical plate portion (118) is also provided with an end cover (106) that is against the outer outer ring of the first bearing (102).

5. The prism scanning device for laser radar according to claim 1, characterized in that: A tower mirror driving motor is also provided, and the tower mirror driving motor includes a motor stator (116) and a motor rotor (114) that are sleeved together. A motor seat (107) is provided on the inner side of the second vertical plate portion (118), and the motor stator (116) is sleeved on the motor seat (107). The tower mirror (112) is provided with a flange (115), and the motor rotor (114) is sleeved on the inner side of the flange (115).

6. The prism scanning device for laser radar according to claim 5, characterized in that: An encoder (2) is provided on the second vertical plate portion (118), and one end of the main shaft (101) close to the tower mirror drive motor is sleeved with the encoder (2).

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