Motor module

Abstract

The utility model discloses a motor module which comprises a surface cover, a bottom cover installed on the outer side of the surface cover, a stepping motor installed on one side of the bottom cover, a screw rod rotatably connected to the inner side of the bottom cover, an output end of the stepping motor fixedly connected with the screw rod, and two internal thread sliding blocks in threaded connection to the outer side of the screw rod. The utility model has the beneficial effects that the two guide rails are arranged to limit and stabilize the moving positions of the two internal thread slide blocks on the outer side of the screw rod, the stability of the screw rod is increased, the high-precision operation is realized, the bearing is arranged to reduce the working resistance of the screw rod during rotation, the working current is reduced, and the service life of the screw rod is prolonged. And through the arrangement of the induction grating and the induction block, the back-and-forth movement of the internal thread sliding block in the grating reset detection design is realized, and the step loss compensation of the stepping motor is ensured through the induction grating detection.

Description

Technical Field

[0001] The utility model relates to the technical field of motor modules, in particular to a motor module. Background Art

[0002] Existing security camera lenses are generally equipped with corresponding drive structures to meet the effect of large-angle camera monitoring of security camera lenses. For camera lenses, they are generally driven by stepper motors to achieve focusing and zooming actions. However, when the existing motor module is running, the movement of the outer internal threaded slider when the screw rotates is not convenient for ensuring the step loss compensation of the stepper motor, and the stability is difficult to guarantee during high-precision work. Utility Model Content

[0003] The purpose of the utility model is to provide a motor module to solve the problem that when the existing motor module mentioned in the above background technology is in operation, the movement of the outer internal thread slider when the screw rod rotates is not convenient for ensuring the step loss compensation of the stepper motor, and the stability is difficult to ensure during high-precision operation.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a motor module, comprising a face cover, a bottom cover is installed on the outer side of the face cover, a stepper motor is installed on one side of the bottom cover, a lead screw is rotatably connected to the inner side of the bottom cover, the output end of the stepper motor is fixedly connected to the lead screw, the outer side of the lead screw is threadedly connected to two internally threaded sliders, both of the two internally threaded sliders are slidably connected to the face cover, a front lens slider is fixedly connected to the top of one of the internally threaded sliders, the front lens slider is slidably connected to the bottom cover, a rear lens slider is fixedly connected to the top of the other internally threaded slider, the rear lens slider is slidably connected to the bottom cover, a motor FPC is installed on one side of the face cover, three sensing gratings are installed on one side of the motor FPC, and one side of the two internally threaded sliders is fixedly connected to a sensing block matching the sensing gratings.

[0005] As a preferred solution of the utility model: the two internally threaded sliders are internally symmetrically slidably connected with two guide rails, and the two guide rails are fixedly connected to the bottom cover.

[0006] As a preferred solution of the utility model: a front lens body is installed on one side of the front lens slider, and a rear lens body is installed on one side of the rear lens slider.

[0007] As a preferred solution of the present invention: magnets are provided inside the front lens body and the rear lens body.

[0008] As a preferred solution of the utility model: a bearing is provided on the outer side of the screw rod, and the bearing is connected to the bottom cover.

[0009] As a preferred solution of the utility model: two screws are installed on one side of the bottom cover.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model sets two guide rails to limit and stabilize the moving position of the two internally threaded sliders on the outside of the screw rod, thereby increasing the stability of the screw rod and achieving high-precision operation; by setting bearings, the working resistance of the bearings during the rotation of the screw rod is reduced, the working current is reduced, and the overall service life of the module is increased; by setting an inductive grating and an inductive block, the grating reset detection design is realized for the back and forth movement of the internally threaded slider, and the lost step compensation of the stepping motor is ensured by inductive grating detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is an exploded view of the structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0013] Figure 3 This is a top view of the bottom cover of the utility model;

[0014] Figure 4 This is a schematic diagram of the FPC structure of the motor of the utility model.

[0015] In the figure: 1. Motor FPC; 2. Surface cover; 3. Bottom cover; 4. Stepper motor; 5. Lead screw; 6. Guide rail; 7. Internal thread slider; 8. Front lens slider; 9. Front lens body; 10. Rear lens body; 11. Magnet; 12. Rear lens slider; 13. Bearing; 14. Screw; 15. Induction grating; 16. Induction block. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figures 1 to 4The utility model provides a technical solution: a motor module, including a face cover 2, a bottom cover 3 is installed on the outside of the face cover 2, a stepping motor 4 is installed on one side of the bottom cover 3, a screw rod 5 is rotatably connected to the inside of the bottom cover 3, the output end of the stepping motor 4 is fixedly connected to the screw rod 5, the outer side of the screw rod 5 is threadedly connected to two internal thread sliders 7, the two internal thread sliders 7 are both slidably connected to the face cover 2, the top of one of the internal thread sliders 7 is fixedly connected to a front lens slider 8, the front lens slider 8 is slidably connected to the bottom cover 3, and the top of the other internal thread slider 7 is fixedly connected to A rear lens slider 12 is connected, and the rear lens slider 12 is slidably connected to the bottom cover 3. A motor FPC1 is installed on one side of the surface cover 2, and three sensing gratings 15 are installed on one side of the motor FPC1. One side of the two internal thread sliders 7 is fixedly connected with a sensing block 16 that cooperates with the sensing grating 15. When the internal thread slider 7 moves, it will drive the sensing block 16 at the bottom to move, and the sensing grating 15 senses the sensing block 16. The grating reset detection design detects the back and forth movement of the internal thread slider 7, and ensures the step loss compensation of the stepping motor 4 through the detection of the sensing grating 15.

[0018] The two internally threaded sliders 7 are symmetrically and slidably connected with two guide rails 6 , and the two guide rails 6 are fixedly connected to the bottom cover 3 .

[0019] The front lens body 9 is installed on one side of the front lens slider 8 , and the rear lens body 10 is installed on one side of the rear lens slider 12 .

[0020] The front lens body 9 is installed on one side of the front lens slider 8 , and the rear lens body 10 is installed on one side of the rear lens slider 12 .

[0021] Among them, a bearing 13 is provided on the outer side of the screw rod 5, and the bearing 13 is connected to the bottom cover 3, so that the bearing 13 reduces the working resistance of the screw rod 5 when rotating, reduces the working current, and increases the service life of the entire module.

[0022] Two screws 14 are installed on one side of the bottom cover 3 .

[0023] Specifically, when in use, the output end of the stepper motor 4 is used to drive the screw rod 5 to rotate. When the screw rod 5 rotates, it drives the outer internal thread slider 7 to slide on the outer side of the guide rail 6. When the internal thread slider 7 moves, it drives the front lens slider 8, the magnet 11, the front lens body 9 and the rear lens body 10 to move synchronously. The moving positions of the two internal thread sliders 7 on the outside of the screw rod 5 are limited and stabilized by the two guide rails 6, thereby increasing the stability of the screw rod 5 and achieving high-precision operation. When the internal thread slider 7 moves, it drives the sensing block 16 at the bottom to move, and the sensing grating 15 senses the sensing block 16. The grating reset detection design detects the back and forth movement of the internal thread slider 7, and ensures the step loss compensation of the stepper motor 4 through the detection of the sensing grating 15.

[0024] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0026] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor module, comprising a cover (2), characterized in that: A bottom cover (3) is installed on the outer side of the surface cover (2), a stepping motor (4) is installed on one side of the bottom cover (3), a lead screw (5) is rotatably connected to the inner side of the bottom cover (3), the output end of the stepping motor (4) is fixedly connected to the lead screw (5), the outer side of the lead screw (5) is threadedly connected to two internal thread sliders (7), both of which are slidably connected to the surface cover (2), the top of one of the internal thread sliders (7) is fixedly connected to a front lens slider (8), the front lens slider (8) is slidably connected to the bottom cover (3), the top of the other internal thread slider (7) is fixedly connected to a rear lens slider (12), the rear lens slider (12) is slidably connected to the bottom cover (3), a motor FPC (1) is installed on one side of the surface cover (2), three sensing gratings (15) are installed on one side of the motor FPC (1), and one side of the two internal thread sliders (7) is fixedly connected to a sensing block (16) that matches the sensing grating (15).

2. A motor module according to claim 1, characterized in that: The two internally threaded sliders (7) are symmetrically slidably connected to two guide rails (6), and the two guide rails (6) are fixedly connected to the bottom cover (3).

3. The motor module according to claim 1, characterized in that: A front lens body (9) is installed on one side of the front lens slider (8), and a rear lens body (10) is installed on one side of the rear lens slider (12).

4. A motor module according to claim 3, characterized in that: Magnets (11) are provided inside the front lens body (9) and the rear lens body (10).

5. The motor module according to claim 1, characterized in that: A bearing (13) is provided on the outer side of the screw rod (5), and the bearing (13) is connected to the bottom cover (3).

6. The motor module according to claim 1, characterized in that: Two screws (14) are installed on one side of the bottom cover (3).

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