Linear motor medicine taking mechanism

Abstract

The utility model discloses a linear motor medicine taking mechanism which comprises a base, a linear motor, a movable platform, a material pushing tongue, a push-pull rod and three photoelectric limiting assemblies. The linear motor is fixed to the base, and the output end of the linear motor is connected with the movable platform to drive the movable platform to linearly reciprocate. The pushing tongue and the push-pull rod are both arranged on the moving platform and used for completing the medicine taking action in a matched mode; the three photoelectric limiting assemblies (the photoelectric original point, the photoelectric positive limiting assembly and the photoelectric negative limiting assembly) are sequentially installed on the base in the movement direction of the linear motor and used for accurately detecting the original point position and the limiting position in the positive direction and the limiting position in the negative direction of the movable platform. The medicine taking device has the advantages of being compact in structure, accurate in positioning and rapid in response, is suitable for narrow space operation of the distributed medicine selling machine, and can effectively improve medicine taking efficiency and accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of automated drug dispensing equipment technology, specifically relating to a linear motor drug dispensing mechanism. Background Technology

[0002] With the automation development of the pharmaceutical retail industry, distributed vending machines have been widely used due to their flexible deployment and wide coverage. As the core component of the vending machine, the dispensing mechanism directly affects the accuracy and efficiency of drug dispensing. In existing technologies, the dispensing mechanisms of vending machines mostly adopt indirect drive methods such as "motor + rack and pinion" or "motor + conveyor belt," which suffer from large transmission backlash and low positioning accuracy. At the same time, limit detection relies heavily on mechanical limits, which are prone to component wear due to collisions, affecting the equipment's lifespan. Furthermore, the compact internal space of distributed vending machines makes traditional dispensing mechanisms difficult to adapt due to their complex structure. Therefore, there is an urgent need for a simple, precise, and rapid dispensing solution. Utility Model Content

[0003] The purpose of this invention is to propose a linear motor-driven drug dispensing mechanism to address the problems mentioned in the background section of the invention.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a linear motor-driven medicine dispensing mechanism, comprising a base, a linear motor, a moving platform, a pusher tongue, a push rod, and a photoelectric limiting assembly. The base, serving as the mounting foundation, is made of aluminum alloy, ensuring structural strength while reducing weight. The linear motor is fixed in the middle of the base, with its mover directly connected to the moving platform, eliminating intermediate transmission components and improving drive efficiency. The moving platform integrates a pusher tongue and a push rod; the push rod pushes the medicine out of the medicine trough, and the pusher tongue assists in separating stacked medicines to prevent over-dispensing. A photoelectric origin, a photoelectric positive limit, and a photoelectric negative limit are sequentially set on the base along the linear motor's direction of movement. Position feedback is achieved by detecting a light-shielding plate on the moving platform, where the photoelectric origin serves as the initial positioning reference, and the positive and negative limits prevent the platform from overtraveling.

[0005] Preferably, the pusher tongue is inclined above the push rod, with an angle of 45° between it and the moving platform. The angle is adjustable, and the length is 60mm with an arc-shaped end.

[0006] Preferably, the push rod is vertically disposed on the front end face of the mobile platform and has a length of 77mm.

[0007] Preferably, the linear motor is a brushless linear servo motor with an effective stroke of 324 mm.

[0008] Preferably, the photoelectric origin, the positive photoelectric limit, and the negative photoelectric limit are all infrared through-beam photoelectric sensors, the distance between the photoelectric origin and the positive photoelectric limit is 115mm, and the distance between the photoelectric origin and the negative photoelectric limit is 64mm.

[0009] Preferably, the mobile platform is fixedly connected to the mover of the linear motor by bolts, and its bottom is provided with a guide slider that slides with the base.

[0010] Preferably, the side of the mobile platform is provided with a light-shielding plate that works in conjunction with the photoelectric sensor.

[0011] Compared with the prior art, the beneficial effects achieved by this utility model are: This utility model,

[0012] (1) Precise positioning: Three photoelectric limit components are used in conjunction with linear motor closed-loop control, and the positioning error can be controlled within ±0.5mm to ensure accurate drug retrieval position;

[0013] (2) Compact structure: The linear motor direct drive reduces transmission components, and the overall length is only 324mm, which is suitable for the narrow space of distributed medicine vending machines;

[0014] (3) Rapid response: The brushless linear motor has a start-up response time of <0.1s, which can quickly complete the medicine dispensing action and improve the efficiency of medicine dispensing;

[0015] (4) Long lifespan: Photoelectric limit is a non-contact detection method, avoiding mechanical collision and wear, and extending the equipment maintenance cycle by more than 30%. Attached Figure Description

[0016] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0018] Figure 2 This is a front view structural diagram of this utility model.

[0019] In the diagram: 1. Base; 2. Linear motor; 3. Moving platform; 4. Push rod; 5. Push tongue; 6. Light shield; 7. Photoelectric origin; 8. Photoelectric positive limit; 9. Photoelectric negative limit. Detailed Implementation

[0020] The following detailed, non-limiting description of the present invention, in conjunction with preferred embodiments and accompanying drawings, is provided. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] Please see Figure 1-2 The present invention provides a technical solution: a linear motor medicine dispensing mechanism, including a base 1, which is made of 6061 aluminum alloy by CNC machining, with a length of 324mm and a width of 115mm.

[0022] A brushless linear servo motor 2 of model LM-20 is fixedly installed on the base 1 by bolts, and its effective stroke is adapted to the length of the base.

[0023] The mover of the linear motor 2 is connected to the moving platform 3 via a flange. The moving platform 3 is made of 6061 aluminum alloy and is CNC machined. The bottom 1 is equipped with a slider (not shown in the figure) that cooperates with the guide rail on the base 1 to ensure smooth movement.

[0024] A push rod 4 is vertically mounted on the front end face of the mobile platform 3. The push rod 4 is made of aluminum alloy, is 77mm long, and has an end arc radius of 10mm, which is used to reduce friction with the medicine when taking it out.

[0025] A pusher tongue 5 is mounted at an angle above the push rod 4 via a bracket. The pusher tongue 5 has an angle of 45° with the moving platform 3 and a length of 60mm. Its end is equipped with a rubber pad to prevent scratching the medicine packaging.

[0026] Three infrared through-beam photoelectric sensors are sequentially mounted on the base 1 along the direction of motion of the linear motor 2: photoelectric origin 7, photoelectric positive limit 8, and photoelectric negative limit 9. Among them, the photoelectric origin 7 is located in the middle of the base 1, with a distance of 115mm from the photoelectric positive limit 8 and a distance of 64mm from the photoelectric negative limit 9.

[0027] The side of the mobile platform 3 is equipped with a light shield 6 that works with the photoelectric sensor. When the light shield 6 blocks the light path of the sensor, the sensor outputs a switch signal to the drug vending machine controller (not shown in the figure) to realize position detection and limit protection.

[0028] Working process: When retrieving medicine, the controller first drives the linear motor 2 to move the mobile platform 3 back to the photoelectric origin 7 to complete the initial positioning; according to the position of the medicine in the medicine tank, the controller calculates the moving distance and drives the linear motor 2 to move the mobile platform 3 in the target direction, and the position is fed back in real time through the photoelectric sensor; when the mobile platform 3 reaches the medicine retrieval position, the linear motor 2 stops, and the controller drives the linear motor 2 to move the mobile platform 3 so that the push rod 4 pushes the medicine out of the medicine tank, and the push tongue 5 moves synchronously to prevent adjacent medicines from being ejected; after the medicine is retrieved, the mobile platform 3 returns to the origin under the control of the controller, waiting for the next medicine retrieval instruction.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A linear motor-driven medicine dispensing mechanism, comprising a base (1), characterized in that: A linear motor (2) is fixedly installed on the base (1). The output end of the linear motor (2) is connected to a moving platform (3). The moving platform (3) is provided with a push rod (4) for taking medicine and a push tongue (5). The base (1) is provided with a photoelectric origin (7), a photoelectric positive limit (8) and a photoelectric negative limit (9) in sequence along the movement direction of the linear motor (2). The photoelectric origin (7) is used to locate the initial position of the moving platform (3). The photoelectric positive limit (8) and the photoelectric negative limit (9) are used to limit the maximum displacement of the moving platform (3) in the positive and negative directions, respectively.

2. The linear motor-driven drug dispensing mechanism according to claim 1, characterized in that: The pusher tongue (5) is inclined above the push rod (4), and the angle between it and the moving platform (3) is 45°. The angle is adjustable, and the length is 60mm with an arc-shaped end.

3. The linear motor-driven drug dispensing mechanism according to claim 1, characterized in that: The push rod (4) is vertically set on the front end face of the moving platform (3) and has a length of 77mm.

4. The linear motor-driven drug dispensing mechanism according to claim 1, characterized in that: The linear motor (2) is a brushless linear servo motor with an effective stroke of 324 mm.

5. The linear motor-driven drug dispensing mechanism according to claim 1, characterized in that: The photoelectric origin (7), photoelectric positive limit (8) and photoelectric negative limit (9) are all infrared through-beam photoelectric sensors. The distance between the photoelectric origin (7) and the photoelectric positive limit (8) is 115mm, and the distance between the photoelectric origin (7) and the photoelectric negative limit (9) is 64mm.

6. The linear motor-driven drug dispensing mechanism according to claim 1, characterized in that: The mobile platform (3) is fixedly connected to the mover of the linear motor (2) by bolts, and its bottom is provided with a guide slider that slides with the base (1).

7. The linear motor-driven drug dispensing mechanism according to claim 1, characterized in that: The side of the mobile platform (3) is provided with a light shield (6) that works in conjunction with the photoelectric sensor.

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