rotating theodolite
By introducing an encoder and a rotating component into the line projector, combined with a grating limit module and a torsion spring, the problem of low rotation accuracy was solved, and high-precision rotation control was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 常州联盛光电科技有限公司
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-26
AI Technical Summary
The existing line projectors have low rotational accuracy and are greatly affected by human factors, making it difficult to meet the requirements of high-precision operations.
The rotating assembly, which uses an encoder and a knob, drives the rotating base to rotate through the meshing of gears and an external gear ring. The rotation range is limited by a grating limit module and a grating limit ruler, and a torsion spring is used to eliminate gaps, achieving precise control.
It improves the rotational accuracy of the rotating base, reduces errors, and meets the requirements of high-precision engineering operations.
Smart Images
Figure CN224285934U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of line projector technology, and in particular to a rotary line projector. Background Technology
[0002] As a commonly used surveying instrument in fields such as building construction, decoration, and equipment installation, the core function of a laser projector is to create a baseline through laser projection, providing a positioning basis for engineering operations. With the development of modern engineering construction towards precision and intelligence, the accuracy requirements for laser projectors are becoming increasingly stringent, especially rotational accuracy, which directly affects the final construction and assembly quality.
[0003] Currently, most line projectors on the market have a rotating mechanism that is directly manually adjusted. The operator has to rotate the scale to adjust the angle. This method is greatly affected by human factors and is prone to large errors during operation, making it difficult to meet the requirements of high-precision operation. Utility Model Content
[0004] This invention aims to solve the problem of low rotational accuracy of line projectors and provides a rotating line projector.
[0005] To achieve the above objectives, the technical solution of this utility model is as follows:
[0006] A rotating telescope is provided, comprising a telescope body, a rotating base, and a mounting base. The telescope body is mounted on the rotating base, and the rotating base is mounted on the mounting base. A control main board is disposed within the telescope body, and a rotating assembly is disposed within the cavity of the rotating base. The rotating assembly includes: a drive component electrically connected to the control main board; a gear connected to the output shaft of the drive component; an external gear ring fixedly connected to the mounting base, the external gear ring meshing with the gear; an encoder electrically connected to the drive component via the control main board; and a knob passing through the rotating base, one end of which is located outside the rotating base, and the other end of which is located inside the cavity and connected to the encoder.
[0007] By installing the encoder in the rotating base and using the connected knob, the rotation angle of the rotating base can be precisely controlled.
[0008] In one embodiment, a plurality of first mounting posts are provided on the mounting base, and a plurality of arc-shaped through slots are opened at the bottom of the rotating base. The first mounting posts pass through the arc-shaped through slots, and the external gear ring is mounted on the first mounting posts.
[0009] Since the gear meshes with the external gear ring, and the external gear ring is fixedly mounted on the mounting base via the first mounting post, the gear rotates along the arc-shaped gear ring of the external gear ring, thereby driving the rotating base to rotate on the mounting base.
[0010] In one embodiment, a torsion spring is provided on the outer gear ring, with one end of the torsion spring contacting the inner wall of the rotating base and the other end contacting the outer wall of the outer gear ring, which can effectively eliminate the backlash between the gear and the outer gear ring.
[0011] In one embodiment, the rotating assembly further includes a grating limiting mold and a grating limiting ruler. The grating limiting mold is installed at the bottom of the rotating base, and one end of the grating limiting ruler is installed on the external gear ring, while the other end is placed on the grating limiting mold.
[0012] By combining the grating limiting ruler and the grating limiting module, the rotation range of the rotating base can be limited while the rotation angle of the rotating base can be accurately fed back.
[0013] In one embodiment, a plurality of second mounting posts are provided inside the cavity of the rotating base, and the main body of the line projector is fixedly mounted on the second mounting posts.
[0014] In one embodiment, a plurality of third mounting posts are provided in the cavity of the rotating base, and the driving member is mounted on the third mounting posts.
[0015] In one embodiment, the main body of the laser projector includes a housing and at least one laser projector. The housing is fixedly connected to the rotating base, and the laser projector is mounted on the outer end face of the housing.
[0016] In one embodiment, the center point of rotation of the rotating base relative to the mounting base is the intersection of the vertical laser lines projected by the laser projectors on two adjacent end faces of the housing.
[0017] In one embodiment, a switch, a control button, and a display screen are also provided on one end face of the housing.
[0018] In one embodiment, a laser generator is disposed within the housing.
[0019] In summary, the rotary projection device provided by this utility model, by incorporating the encoder within the rotating base and cooperating with the connected knob, can precisely control the rotation angle of the rotating base. Furthermore, the torsion spring within the rotating base reduces the backlash between the gear and the external gear ring, and the cooperation between the grating limiting mold and the grating limiting ruler further improves the rotational accuracy of the rotating base.
[0020] To make the above-mentioned features and advantages of the utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description
[0021] Figure 1 A three-dimensional structural diagram of the rotating projection device provided by this utility model.
[0022] Figure 2 This is a three-dimensional structural diagram of the rotating base and mounting base in the rotating projector provided by this utility model.
[0023] Figure 3 An exploded three-dimensional view of the rotating base and mounting base in the rotating projection device provided by this utility model.
[0024] Figure 4 This is a top view of the rotating base and mounting base in the rotating projector provided by this utility model.
[0025] Figure 5 This is a top view of the rotating component in the rotating projector provided by this utility model.
[0026] Figure 6 This is a three-dimensional structural diagram of the driving component in the rotary projector provided by this utility model.
[0027] Figure 7 An exploded three-dimensional view of the driving component in the rotary projector provided by this utility model.
[0028] Figure 8 This is a top view of the rotating projector provided by this utility model in its unrotated state.
[0029] Figure 9 This is a top view of the rotating projector provided by this utility model after rotation.
[0030] Figure label:
[0031] 1-Laser projector; 11-Laser projector body; 111-Housing shell; 112-Laser projector; 113-Switch; 114-Control button; 115-Display screen; 12-Rotating base; 121-Rotating assembly; 1211-External gear ring; 1212-Driver; 1213-Gear; 1214-Encoder; 1215-Knob; 1216-Mounting bracket; 1217-Torsion spring; 1218-Grate limiting mold; 1219-Grate limiting ruler; 122-Cavity; 123-Bottom; 1231-Arc-shaped through groove; 1232-Second mounting post; 1233-Third mounting post; 13-Mounting base; 131-First mounting post; P-Center of rotation. Detailed Implementation
[0032] To make the objectives and technical solutions of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0033] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.
[0034] like Figure 1 As shown, this utility model provides a rotating projection device 1, including a projection device body 11, a rotating base 12 and a mounting base 13. The projection device body 11 is fixedly mounted on the rotating base 12, and the rotating base 12 is mounted on the mounting base 13, so that the projection device body 11 and the rotating base 12 can rotate in the forward and reverse directions relative to the mounting base 13.
[0035] The main body 11 of the laser projector includes a housing 111 and at least one laser projection element 112. The housing 111 has a generally rectangular parallelepiped structure and is fixedly connected to the rotating base 12. The laser projection element 112 is mounted on the outer peripheral surface of the housing 111. The housing 111 contains a laser generator, a control motherboard (not shown in the figure), and other components, which are not listed here. The laser beam emitted by the laser generator inside the housing 111 is projected onto the target positioning point through the projection element 112. In this embodiment, three laser projection elements 112 are included, respectively mounted on the three end faces of the housing 111. A switch 113, a control button 114, and a display screen 115 are also provided on one end face of the housing 111. The switch 113 controls the opening and closing of the rotating laser projector 1; the control button 114 can set the laser parameters of the rotating laser projector 1; and the display screen 115 can display the parameters of the rotating laser projector 1.
[0036] Please combine Figure 2 and Figure 3 The rotating base 12 is mounted on the mounting base 13, and a rotating component 121 is installed inside the rotating base 12, so that the rotating base 12 can rotate relative to the mounting base 13.
[0037] Specifically, the mounting base 13 has a roughly rectangular parallelepiped structure, and a plurality of first mounting posts 131 are provided on its upper end face. The first mounting posts 131 protrude from the end face of the mounting base 13 and are used to mount the rotating assembly 121.
[0038] Combination Figure 4 The rotating base 12 has a shape similar to that of the mounting base 13, being approximately a cuboid structure. The rotating base 12 is a hollow structure with an open top, including a cavity 122 and a bottom 123. The rotating assembly 121 is placed inside the cavity 122 and connected to the bottom 123, and the bottom 123 contacts the upper surface of the mounting base 13. Multiple arc-shaped through slots 1231 are formed on the bottom 123, and the first mounting post 131 passes through the arc-shaped through slots 1231 and connects to the rotating assembly 121. The number of arc-shaped through slots 1231 is the same as the number of first mounting posts 131. When the rotating base 12 rotates on the mounting base 13, the first mounting posts 131 move relative to each other within the arc-shaped through slots 1231. In this embodiment, four first mounting posts 131 are provided on the mounting base 13, and correspondingly, four arc-shaped through slots 1231 are provided on the bottom 123 of the rotating base 12. Of course, in other embodiments, the number of first mounting posts 131 and arc-shaped through slots 1231 can be adjusted according to actual needs. Multiple second mounting posts 1232 are also provided at the four corners of the bottom 123, and the second mounting posts 1232 are placed inside the cavity 122 for fixing the projector body 11. Furthermore, near the arc-shaped through slots 1231, two third mounting posts 1233 are provided on the bottom 123, and the third mounting posts 1233 are used to mount the rotating assembly 121.
[0039] Please combine Figures 5 to 7The rotating assembly 121 includes an external gear ring 1211, a drive member 1212, a gear 1213, an encoder 1214, a knob 1215, and a mounting bracket 1216. The drive member 1212 is mounted on the third mounting post 1233 via the mounting bracket 1216. The gear 1213 is connected to the output shaft of the drive member 1212. The external gear ring 1211 is mounted on the first mounting post 131 and meshes with the gear 1213. The drive member 1212 drives the gear 1213 to rotate. Since the gear 1213 meshes with the external gear ring 1211, and the external gear ring 1211 is fixedly mounted on the mounting base 13 via the first mounting post 131, the gear 1213 rotates along the arc-shaped gear ring of the external gear ring 1211, thereby driving the rotating base 12 to rotate on the mounting base 13. In this embodiment, the driving component 1212 is a stepper motor, which is electrically connected to the control motherboard in the main body 11 of the line projector.
[0040] In addition, in this embodiment, a torsion spring 1217 is also installed on the outer gear ring 1211. One end of the torsion spring 1217 contacts the inner wall of the rotating base 12, and the other end contacts the outer wall of the outer gear ring 1211. The torsion spring 1217 can effectively eliminate the backlash between the gear 1213 and the outer gear ring 1211.
[0041] The encoder 1214 is installed near the drive unit 1212 and is electrically connected to the control board in the main body 11 of the projector. The knob 1215 is mounted on the outer wall of the rotating base 12 and connected to the encoder 1214 within the cavity 122. The knob 1215 allows selection of the direction (forward or reverse) and angle of rotation of the rotating base 12. The encoder 1214, connected to the knob 1215, transmits signals to the control board in the main body 11, which then transmits signals to the drive unit 1212, causing it to rotate the rotating base 12 according to preset parameters. The cooperation between the knob 1215 and the encoder 1214 effectively improves the rotational accuracy of the rotating base 12.
[0042] The rotating assembly 121 further includes a grating limiting mold 1218 and a grating limiting ruler 1219. The grating limiting mold 1218 is mounted on the bottom 123 of the rotating base 12. One end of the grating limiting ruler 1219 is mounted on the external gear ring 1211, and the other end is placed on the grating limiting mold 1218. Through the cooperation of the grating limiting ruler 1219 and the grating limiting mold 1218, the rotation range of the rotating base 12 can be limited, while the rotation angle of the rotating base 12 can be accurately fed back.
[0043] Please combine Figures 3 to 9 The working principle of the rotating projection device 1 is as follows:
[0044] Rotating the knob 1215 selects the direction (forward or reverse) and angle of rotation of the rotating base 12. The encoder 1214 transmits the signal to the control board in the projector body 11, which then converts the signal and transmits it to the drive unit 1212. After receiving the signal, the drive unit 1212 drives the gear 1213 to rotate a certain number of revolutions. Since the gear 1213 meshes with the outer gear ring 1211 and the outer gear ring 1211 is fixedly mounted on the mounting base 13, the gear 1213 rotates along the arc-shaped gear ring of the outer gear ring 1211, thereby driving the rotating base 12 to rotate on the mounting base 13. The center point of rotation is the intersection point P of the vertical laser lines projected on the two adjacent end faces of the outer shell 111.
[0045] In summary, the rotary projection device 1 provided by this utility model, by setting the encoder 1214 in the rotary base 12 and cooperating with the connected knob 1215, can precisely control the rotation angle of the rotary base 12. Furthermore, the torsion spring 1217 in the rotary base 12 can reduce the backlash between the gear 1213 and the external gear ring 1211, and the cooperation between the grating limiting mold 1218 and the grating limiting ruler 1219 can further improve the rotation accuracy of the rotary base 12.
[0046] Although the present invention has been described and illustrated in detail with reference to preferred embodiments, the present invention is not limited to the disclosed examples, and those skilled in the art can derive other variations therefrom without departing from the protection scope of the present invention.
Claims
1. A rotary line projector comprising a line projector main body, a rotary base, and a mounting base, the line projector main body being mounted on the rotary base, the rotary base being mounted on the mounting base, a control main board being provided in the line projector main body, characterized in that, A rotating assembly is disposed within the cavity of the rotating base, the rotating assembly comprising, The driving component is electrically connected to the control motherboard; The gear is connected to the output shaft of the drive component; An external gear ring is fixedly connected to the mounting base, and the external gear ring meshes with the gear; The encoder is electrically connected to the drive unit via the control motherboard; A knob is mounted on the rotating base, with one end placed outside the rotating base and the other end placed inside the cavity and connected to the encoder.
2. The shadow-caster of claim 1, wherein, The mounting base is provided with a plurality of first mounting posts, and the bottom of the rotating base is provided with a plurality of arc-shaped through slots. The first mounting posts pass through the arc-shaped through slots, and the external gear ring is mounted on the first mounting posts.
3. The shadow-caster of claim 1, wherein, A torsion spring is provided on the outer gear ring, with one end of the torsion spring contacting the inner wall of the rotating base and the other end contacting the outer wall of the outer gear ring.
4. The shadow-caster of claim 1, wherein, The rotating assembly also includes a grating limiting mold and a grating limiting ruler. The grating limiting mold is installed at the bottom of the rotating base, and one end of the grating limiting ruler is installed on the external gear ring, while the other end is placed on the grating limiting mold.
5. The rotating projector according to claim 2, characterized in that, Multiple second mounting posts are provided inside the cavity of the rotating base, and the main body of the line projector is fixedly mounted on the second mounting posts.
6. The rotating projector according to claim 5, characterized in that, The rotating base has multiple third mounting posts inside its cavity, and the driving component is mounted on the third mounting posts.
7. The rotating projector according to claim 1, characterized in that, The main body of the laser projector includes a housing and at least one laser projection element. The housing is fixedly connected to the rotating base, and the laser projection element is mounted on the outer end face of the housing.
8. The rotating projector according to claim 7, characterized in that, The center point of the rotation of the rotating base relative to the mounting base is the intersection of the vertical laser lines projected by the laser projectors on the two adjacent end faces of the housing.
9. The rotating projector according to claim 8, characterized in that, A switch, control button, and display screen are also provided on one end face of the housing.
10. The rotating projector according to claim 9, characterized in that, A laser generator is installed inside the housing.