Frameless motor for SLAM scanner

Abstract

The utility model provides a frameless motor for an SLAM scanner, which comprises an outer shell, a rotatable motor shaft is arranged in the outer shell, a stator is arranged on the inner wall of the outer shell, a rotor is arranged on the outer wall of the motor shaft, the stator and the rotor are coaxially sleeved, a first bearing and a second bearing are arranged in the outer shell, and two ends of the motor shaft are respectively sleeved with the first bearing and the second bearing. And a corrugated spring is arranged at one end of the outer shell and compresses the second bearing, so that the problem that a traditional standard motor cannot meet the requirements of light weight and high precision of a handheld SLAM scanner is solved.

Description

Technical Field

[0001] This utility model relates to the field of SLAM scanners, and in particular to a frameless motor for SLAM scanners. Background Technology

[0002] With the increasing maturity of short-range 3D scanning technology, handheld SLAM scanners have emerged. The market offers a wide variety of handheld SLAM scanners, but their quality varies greatly. While pursuing miniaturization, scanning accuracy and stability are also paramount. The core hardware of handheld SLAM is a motor that drives the scanning head to rotate 360° for data scanning, making motor selection particularly crucial.

[0003] Currently, motors are typically standard components, such as robotic arm motors, gimbal motors, and hollow turntables. However, their application in handheld SLAM scanners presents several challenges. For example, robotic arm motors have excessive backlash and are not compact enough; gimbal motors, while small and lightweight, suffer from poor stability, resulting in unsatisfactory point cloud data; and hollow turntables, while highly accurate, exceed design specifications in both size and weight. Furthermore, these standard motors usually consist of independent housing structures, making them bulky and heavy, thus unsuitable for handheld SLAM scanners. Utility Model Content

[0004] This invention provides a frameless motor for SLAM scanners, which solves the problem that traditional standard motors cannot meet the requirements of lightweight and high precision in handheld SLAM scanners.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a frameless motor for a SLAM scanner, including a housing, a rotatable motor shaft inside the housing, a stator on the inner wall of the housing, a rotor on the outer wall of the motor shaft, the stator and the rotor being coaxially sleeved, a first bearing and a second bearing inside the housing, both ends of the motor shaft being sleeved with the first bearing and the second bearing respectively, and a corrugated spring at one end of the housing, the corrugated spring pressing the second bearing.

[0006] In the preferred embodiment, one end of the outer casing is provided with a bearing mounting groove, the first bearing is located in the bearing mounting groove, the other end of the outer casing is provided with a bearing positioning sleeve, the second bearing is located inside the bearing positioning sleeve, one end of the bearing positioning sleeve is provided with a threaded spring cover, a corrugated spring is located inside the bearing positioning sleeve, and the two ends of the corrugated spring abut against the second bearing and the spring cover, respectively.

[0007] In the preferred embodiment, the motor shaft has a large-diameter section in the middle, the rotor is located on the outer wall of the large-diameter section, and the large-diameter section on the motor shaft is fitted with a first washer and a second washer at both ends. The first bearing and the second bearing are respectively attached to the first washer and the second washer on one side.

[0008] In a preferred embodiment, one end of the outer casing is provided with a threaded bearing end cap, and one side of the bearing end cap presses against the first bearing.

[0009] In the preferred embodiment, the bearing positioning sleeve is provided with a flange, which is connected to the end of the housing by screws.

[0010] The beneficial effects of this utility model are as follows: the outer shell of the frameless motor can be used as part of the structure of the handheld SLAM scanner. Compared with the standard motor, one layer of the shell structure is reduced, thus making it lightweight; the use of corrugated springs to press the rotating bearing reduces the bearing clearance of the motor, ensuring the stability of the motor rotation process, thereby improving the mapping accuracy of the 3D laser scanner; the use of a modular design reduces the difficulty of processing and manufacturing the shell structure. Attached Figure Description

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

[0012] Figure 1 This is a cross-sectional view of the present invention.

[0013] Figure 2 This is a schematic diagram of one end face of the present invention.

[0014] Figure 3 This is a schematic diagram of the other end face of this utility model.

[0015] In the figure: outer casing 1; bearing mounting groove 101; stator 2; rotor 3; first bearing 4; second bearing 5; motor shaft 6; large diameter section 601; bearing positioning sleeve 7; flange section 701; spring cover 8; bearing end cover 9; corrugated spring 10; first washer 11; second washer 12. Detailed Implementation

[0016] Example 1:

[0017] like Figure 1-3 In the present invention, a frameless motor for a SLAM scanner includes a housing 1, a rotatable motor shaft 6 inside the housing 1, a stator 2 on the inner wall of the housing 1, and a rotor 3 on the outer wall of the motor shaft 6. The stator 2 and the rotor 3 are coaxially sleeved together. A first bearing 4 and a second bearing 5 are provided inside the housing 1. The two ends of the motor shaft 6 are respectively sleeved with the first bearing 4 and the second bearing 5. A corrugated spring 10 is provided at one end of the housing 1, and the corrugated spring 10 presses against the second bearing 5.

[0018] The outer casing 1 is part of the main structure of the SLAM scanner, and its outer surface and one end face are connected to other components of the SLAM scanner. The interior of the outer casing 1 is hollow, and a recessed structure, namely a bearing mounting groove 101, is provided at one end for mounting the first bearing 4. The stator 2 is inserted into the bottom end from the other end opening of the outer casing 1, on the back side of the first bearing 4.

[0019] In the preferred embodiment, one end of the outer casing 1 is provided with a bearing mounting groove 101, the first bearing 4 is provided at the bearing mounting groove 101, the other end of the outer casing 1 is provided with a bearing positioning sleeve 7, the second bearing 5 is provided inside the bearing positioning sleeve 7, one end of the bearing positioning sleeve 7 is provided with a threaded spring cover 8, and a corrugated spring 10 is provided inside the bearing positioning sleeve 7, with both ends of the corrugated spring 10 abutting against the second bearing 5 and the spring cover 8 respectively.

[0020] After the stator 2 is fixed to the inner wall of the outer casing 1, the bearing positioning sleeve 7 is inserted. The rotor 3 is fixed to the middle of the motor shaft 6 and inserted into the first bearing 4 together. Then, the second bearing 5 is sleeved on the motor shaft 6 and installed at the bottom of the recessed structure of the bearing positioning sleeve 7. The corrugated spring 10 is placed in and the spring cover 8 is installed to press the corrugated spring 10.

[0021] In the preferred embodiment, the motor shaft 6 has a large diameter section 601 in the middle, the rotor 3 is located on the outer wall of the large diameter section 601, and the two ends of the large diameter section 601 on the motor shaft 6 are fitted with a first washer 11 and a second washer 12, and the first bearing 4 and the second bearing 5 are respectively attached to the first washer 11 and the second washer 12 on one side.

[0022] The thickness of the first washer 11 and the second washer 12 can be customized according to the width of the rotor 3 and the large diameter part 601, so as to fit against the bearing and prevent the inner rings of the first bearing 4 and the second bearing 5 from loosening.

[0023] In a preferred embodiment, one end of the outer casing 1 is provided with a threaded bearing end cover 9, and one side of the bearing end cover 9 presses against the first bearing 4.

[0024] The bearing end cover 9 closes the opening end of the outer shell 1 on the mounting side of the first bearing 4 and presses the first bearing 4 to prevent the first bearing 4 from moving axially.

[0025] In a preferred embodiment, the bearing positioning sleeve 7 is provided with a flange 701, which is connected to the end of the outer casing 1 by screws.

[0026] The outer wall of the bearing positioning sleeve 7 serves as a reference and fits into the open end of the outer casing 1 away from the first bearing 4, improving the installation accuracy of the second bearing 5. It is tightened with screws to prevent the bearing positioning sleeve 7 from loosening. Furthermore, it provides a mounting base for the spring cover 8, reducing the structural complexity and manufacturing difficulty of the outer casing 1.

[0027] Example 2:

[0028] A high-precision frameless motor features a stainless steel motor shaft. Deep groove ball bearings 1 and 2 are mounted with an interference fit, and axial positioning is ensured by bearing retaining rings 1 and 2, respectively. The outer ring of deep groove ball bearing 1 is fitted with a stainless steel bushing 1 via a sliding fit, preventing deformation under load. Similarly, the outer ring of deep groove ball bearing 2 is fitted with a stainless steel bushing 2 via a sliding fit, also preventing deformation under load. The frameless motor stator is secured to the motor housing with strong metal adhesive. The bushing fasteners and bearing caps are mounted to the motor housing with Phillips head countersunk screws, and a preload spring is added to eliminate axial clearance in the bearings. The design is simple and compact, with the high-precision motor weighing only 500g.

[0029] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A frameless motor for a SLAM scanner, characterized in that: The device includes an outer shell (1), a rotatable motor shaft (6) inside the outer shell (1), a stator (2) on the inner wall of the outer shell (1), a rotor (3) on the outer wall of the motor shaft (6), the stator (2) and the rotor (3) being coaxially connected, a first bearing (4) and a second bearing (5) inside the outer shell (1), the two ends of the motor shaft (6) being connected to the first bearing (4) and the second bearing (5) respectively, and a corrugated spring (10) at one end of the outer shell (1) pressing the second bearing (5).

2. The frameless motor for a SLAM scanner according to claim 1, characterized in that: One end of the outer shell (1) is provided with a bearing mounting groove (101), the first bearing (4) is located in the bearing mounting groove (101), the other end of the outer shell (1) is provided with a bearing positioning sleeve (7), the second bearing (5) is located in the bearing positioning sleeve (7), one end of the bearing positioning sleeve (7) is provided with a threaded spring cover (8), the corrugated spring (10) is located in the bearing positioning sleeve (7), and the two ends of the corrugated spring (10) abut against the second bearing (5) and the spring cover (8) respectively.

3. The frameless motor for a SLAM scanner according to claim 1, characterized in that: The motor shaft (6) has a large diameter section (601) in the middle, and the rotor (3) is located on the outer wall of the large diameter section (601). The large diameter section (601) on the motor shaft (6) is also fitted with a first washer (11) and a second washer (12) at both ends. The first bearing (4) and the second bearing (5) are respectively attached to the first washer (11) and the second washer (12) on one side.

4. The frameless motor for a SLAM scanner according to claim 1, characterized in that: One end of the outer casing (1) is provided with a threaded bearing end cap (9), and the first bearing (4) is pressed against one side of the bearing end cap (9).

5. The frameless motor for a SLAM scanner according to claim 1, characterized in that: The bearing positioning sleeve (7) is provided with a flange (701), which is connected to the end of the outer casing (1) by screws.

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