Electric detection limit tool for driving motor of vending machine

Abstract

The utility model relates to a limiting fixture, specifically, an electric detection machine detection limiting fixture for driving motor on automatic vending machine. Including base plate, the upside wall fixed mounting of base plate has the placement board, the oblique upper side of placement board is provided with photoelectric sensor. The utility model discloses, when pressing down the moving plate, through the cooperation drive of the roller and the wedge block inclined plane two clamps opposite movement, make the crown gear and the tooth groove on the drum disengage, at this moment can freely rotate the extension rod to adjust the detection angle of photoelectric sensor, make it accurate alignment different size shell on the position of the reflective sticker, thereby adapt to the detection demand of a variety of specifications drive motor, after adjusting, loosen the moving plate, the reset spring pushes the clamping plate reset, the crown gear reengages with the tooth groove, locked the detection angle of photoelectric sensor, avoided the angle deviation caused by vibration or false touch, ensured the stability of the rotational speed detection process and the accuracy of the measurement result.

Description

Technical Field

[0001] This utility model relates to a limiting fixture, specifically, to a limiting fixture for detecting the drive motor of an automatic vending machine using an electrical testing machine. Background Technology

[0002] The drive motor in an automatic vending machine is its core component, responsible for driving the dispensing mechanism, lifting mechanism, and other devices to accurately dispense products. To ensure its long-term reliability and stability, its operating status (such as speed and current) must be rigorously tested after assembly. Speed ​​is a key indicator of motor performance, and its accuracy directly affects the success of the dispensing action. Therefore, speed testing of the drive motor is a crucial quality control step in the production process.

[0003] In existing technologies, non-contact photoelectric sensors are commonly used to detect rotational speed. This involves attaching a reflective sticker to the motor's output shaft; the sensor emits a beam of light and receives the reflected light pulse signal to calculate the rotational speed. However, different drive motor models and their housing dimensions vary, resulting in variations in the installation position (height and horizontal angle) of the reflective sticker on the output shaft. Therefore, when inspecting different products, it is essential to flexibly adjust the detection angle and installation height of the photoelectric sensor to ensure that the sensor's emission port is precisely aligned with the center of the reflective sticker. Otherwise, an effective reflected signal cannot be captured, leading to detection failure or severely distorted readings.

[0004] In traditional fixtures, the adjustment of photoelectric sensors usually relies on simple bolt tightening methods. For example, the bolts fixing the sensor bracket are loosened, manually adjusted to the approximate angle, and then tightened again. However, the friction of bolt tightening is limited. When the operator picks up or puts down the drive motor, causing instantaneous vibration, or accidentally touches the bracket, the sensor bracket is prone to slow displacement or loosening, resulting in unpredictable slight changes in the emission angle. This instability of the emission angle can lead to detection risks: if the sensor beam is not continuously aligned with the reflective sticker, the reflected light signal will be weak or completely lost, causing the speed detection data to jump, become distorted, or even interrupt the detection, directly resulting in misjudgment or missed detection, rendering the quality inspection meaningless. Summary of the Invention

[0005] The purpose of this utility model is to provide an electrical testing machine for the limit fixture of the drive motor in an automatic vending machine, so as to solve the problems mentioned in the background art above: The friction of bolt tightening is limited. When the operator picks up or puts down the drive motor, causing instantaneous vibration, or accidentally touches the bracket, the sensor bracket is prone to slow displacement or loosening, resulting in unpredictable slight changes in the emission angle.

[0006] To address the above problems, the present invention aims to provide a limit fixture for an electrical testing machine used in a vending machine to drive a motor. The fixture includes a base plate, a placement plate fixedly mounted on the upper side wall of the base plate, a photoelectric sensor positioned diagonally above the placement plate, and an angle adjustment mechanism on the base plate for adjusting the detection angle of the photoelectric sensor. The angle adjustment mechanism includes a U-shaped frame fixedly mounted on the upper side wall of the base plate, a rotating shaft rotatably mounted on the side of the U-shaped frame near the placement plate, a roller coaxially fixedly mounted at the middle position of the rotating shaft, an extension rod fixedly connected to the circumferential side wall of the roller, and the photoelectric sensor fixedly mounted on the extension rod. Gear grooves are formed at both ends of the roller. Two clamping plates are symmetrically and horizontally slidably arranged inside the U-shaped frame. Crown gears are fixedly mounted on opposite sides of the two clamping plates at positions corresponding to the tooth grooves. An adjustment component for adjusting the distance between the two clamping plates is provided on the U-shaped frame. When the adjustment component drives the two clamping plates closer together, the crown gears mesh with the corresponding tooth grooves.

[0007] As a further improvement to this technical solution, four blocks are provided around the placement plate, and the blocks are fixedly installed on the upper side wall of the substrate.

[0008] As a further improvement to this technical solution, a circular groove is coaxially formed on the clamp plate at a position corresponding to the rotating shaft. The inner diameter of the circular groove is larger than the outer diameter of the rotating shaft, and the rotating shaft is disposed inside the circular groove.

[0009] As a further improvement to this technical solution, the adjusting assembly includes two guide rods that are horizontally fixed inside the U-shaped frame. The clamping plate is slidably sleeved on the two guide rods. A return spring sleeved on the guide rod is fixedly connected between the clamping plate and the inner wall of the U-shaped frame. The return spring pushes the two clamping plates closer to each other.

[0010] As a further improvement to this technical solution, the adjustable distance component also includes a cover plate fixedly installed on the side wall of the U-shaped frame. A movable plate is slidably disposed through the middle position of the cover plate. A wheel frame is fixedly connected to the lower end of the movable plate, and rollers are rotatably installed at both ends of the wheel frame.

[0011] As a further improvement to this technical solution, wedges are fixedly connected to the upper side wall of the clamp plate at the positions corresponding to the rollers, and the sides of the two wedges that are close to each other are set as inclined surfaces, and the rollers contact the inclined surfaces of the corresponding wedges.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The automatic vending machine uses an electrical testing machine to detect the limit fixture of the drive motor. When the moving plate is pressed down, the rollers and the inclined surface of the wedge block drive the two clamping plates to move in opposite directions, causing the crown gear to disengage from the tooth groove on the roller. At this time, the extension rod can be freely rotated to adjust the detection angle of the photoelectric sensor, so that it can accurately align with the position of the reflective sticker on the housing of different sizes, thereby adapting to the detection needs of various specifications of drive motors. After adjustment, the moving plate is released, the return spring pushes the clamping plate to reset, and the crown gear re-engages with the tooth groove, locking the detection angle of the photoelectric sensor. This avoids angle deviation caused by vibration or accidental touch, ensuring the stability of the speed detection process and the accuracy of the measurement results. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the angle adjustment mechanism and photoelectric sensor of this utility model; Figure 3 For the present utility model Figure 2 Partial structural diagram; Figure 4 This is one of the partial structural schematic diagrams of the angle adjustment mechanism of this utility model; Figure 5 This is the second partial structural schematic diagram of the angle adjustment mechanism of this utility model; Figure 6 This is a partial structural schematic diagram of the adjustable distance component of this utility model; Figure 7 For the present utility model Figure 4 A sectional view.

[0014] The meanings of the labels in the diagram are as follows: 1. Substrate; 11. Placement plate; 12. Stop; 2. Photoelectric sensor; 3. Angle adjustment mechanism; 31. U-shaped frame; 32. Rotating shaft; 33. Roller; 331. Gear groove; 34. Extension rod; 35. Clamping plate; 351. Circular groove; 352. Crown gear; 36. Adjustable distance assembly; 361. Guide rod; 362. Return spring; 363. Wedge block; 364. Cover plate; 365. Wheel frame; 366. Roller; 367. Moving plate. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0016] Please see Figure 1 As shown, the purpose of this embodiment is to provide a limit fixture for detecting drive motors in vending machines using an electrical testing machine. It includes a base plate 1, a placement plate 11 fixedly mounted on the upper sidewall of the base plate 1, and four stops 12 arranged around the perimeter of the placement plate 11. The upper sidewalls of the stops 12 are higher than the upper sidewall of the placement plate 11. The stops 12 are fixedly mounted on the upper sidewall of the base plate 1. In use, the housing with the drive motor installed is placed on the placement plate 11, and the four stops 12 are distributed around the housing to prevent the housing from detaching from the placement plate 11. It should be noted that an appropriate gap should be maintained between the stops 12 and the housing to allow the operator to make slight horizontal adjustments to the housing position, thereby ensuring detection accuracy.

[0017] A photoelectric sensor 2 is installed diagonally above the placement plate 11. The photoelectric sensor 2 is electrically connected to an external test control box. The output shaft of the drive motor extends outside the housing, and a reflective sticker is affixed to the exposed part of the output shaft. The operator can fine-tune the position of the housing so that the emission port of the photoelectric sensor 2 is directly facing the reflective sticker. The specific detection principle is as follows: The photoelectric sensor 2 works by emitting a light beam and receiving reflected light. When the drive motor runs, the output shaft drives the reflective sticker to rotate. The sensor captures the periodic reflected light signals, and the test control box calculates the number of light pulses per unit time, thereby accurately measuring the rotational speed of the motor output shaft.

[0018] The operator electrically connects the test control box to the drive motor. After starting the drive motor, the output shaft drives the reflective sticker to rotate. The photoelectric sensor 2 monitors the rotation speed in real time by detecting changes in the reflective signal and transmits the data to the test control box for analysis and processing. The test control box outputs a predetermined voltage to the drive motor and collects the operating current of the drive motor in real time through its internal current detection circuit. The current and rotation speed data are analyzed and processed together, and then the rotation speed and current values ​​are displayed on the display screen of the test control box. It should be noted that the test control box and the photoelectric sensor 2 are both commercially available mature products, and their speed measurement principle is existing technology, which will not be elaborated here.

[0019] To accommodate the detection requirements of housings of different sizes, the mounting positions of each stop 12 on the substrate 1 are adjustable. Furthermore, an angle adjustment mechanism 3 is provided on the substrate 1 to adjust the detection angle of the photoelectric sensor 2. The structure of the angle adjustment mechanism 3 is detailed below, referring to... Figure 2 The angle adjustment mechanism 3 includes a U-shaped frame 31 fixedly installed on the upper side wall of the substrate 1. A rotating shaft 32 is rotatably installed on the side of the U-shaped frame 31 near the placement plate 11. A roller 33 is coaxially fixedly installed at the middle position of the rotating shaft 32. An extension rod 34 is fixedly connected to the circumferential side wall of the roller 33. The extension rod 34 extends upward at an incline toward the placement plate 11.

[0020] Reference Figure 3 The photoelectric sensor 2 is fixedly mounted on the extension rod 34 by bolts. The mounting position of the photoelectric sensor 2 on the extension rod 34 is adjustable to adjust the mounting height of the photoelectric sensor 2. At the same time, by rotating the rotating shaft 32, the roller 33, the extension rod 34 and the photoelectric sensor 2 are driven to rotate synchronously, which can adjust the detection angle of the photoelectric sensor 2 and ensure that the photoelectric sensor 2 can face the reflective stickers on the housings of different sizes, so as to realize the detection of the speed of various drive motors.

[0021] After adjustment, the detection angle of photoelectric sensor 2 needs to be locked to prevent deviation. For this purpose, toothed grooves 331 are provided at both ends of the roller 33. Figure 4 The U-shaped frame 31 has two symmetrical horizontal sliding clamps 35 inside. On the opposite side of the two clamps 35, a crown gear 352 is fixedly installed at the position corresponding to the tooth groove 331. A circular groove 351 is coaxially opened on the clamps 35 at the position corresponding to the rotating shaft 32. The inner diameter of the circular groove 351 is larger than the outer diameter of the rotating shaft 32. The rotating shaft 32 is located inside the circular groove 351. The U-shaped frame 31 is provided with a distance adjustment component 36 for adjusting the distance between the two clamps 35.

[0022] When the adjusting assembly 36 drives the two clamping plates 35 to approach each other, the crown gear 352 meshes with the corresponding tooth groove 331, thereby limiting the rotation of the rotating shaft 32 and connected components, avoiding the detection angle deviation of the photoelectric sensor 2 due to vibration or accidental contact, and ensuring the stability of the detection process.

[0023] The structure of the adjustment component 36 is described in detail below, with reference to... Figures 5-7 The adjustable clamping assembly 36 includes two guide rods 361 that are horizontally fixed inside the U-shaped frame 31. The clamping plate 35 is slidably sleeved on the two guide rods 361, so that the clamping plate 35 can only move along the axial direction of the guide rods 361. A return spring 362 sleeved on the guide rods 361 is fixedly connected between the clamping plate 35 and the inner wall of the U-shaped frame 31. The return spring 362 pushes the two clamping plates 35 closer to each other, so that the crown gear 352 meshes with the corresponding tooth groove 331, thereby restricting the rotation of the rotating shaft 32.

[0024] The adjustable distance assembly 36 also includes a cover plate 364 fixedly installed on the upper side wall of the U-shaped frame 31. A movable plate 367 is slidably disposed through the middle position of the cover plate 364. A wheel frame 365 is fixedly connected to the lower end of the movable plate 367. Rollers 366 are rotatably installed at both ends of the wheel frame 365. Wedges 363 are fixedly connected to the upper side wall of the clamping plate 35 at positions corresponding to the rollers 366. The sides of the two wedges 363 that are close to each other are set as inclined surfaces. The rollers 366 roll in contact with the inclined surfaces of the corresponding wedges 363.

[0025] When it is necessary to adjust the detection angle of photoelectric sensor 2, the operator presses down on the moving plate 367, causing the wheel frame 365 and roller 366 to move down. The roller 366 pushes the clamping plate 35 to both sides along the inclined surface of the wedge block 363, compressing the return spring 362. The crown gear 352 disengages from the tooth groove 331. At this time, the extension rod 34 can be rotated freely to adjust the detection angle of photoelectric sensor 2. After the adjustment is completed, the moving plate 367 is released, the return spring 362 rebounds, and pushes the two clamping plates 35 closer to each other. The crown gear 352 re-engages with the tooth groove 331, thereby locking the emission angle of photoelectric sensor 2.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A limit fixture for detecting drive motors in automatic vending machines, comprising a base plate (1), characterized in that: A placement plate (11) is fixedly installed on the upper side wall of the substrate (1). A photoelectric sensor (2) is disposed diagonally above the placement plate (11). An angle adjustment mechanism (3) is disposed on the substrate (1). The angle adjustment mechanism (3) is used to adjust the detection angle of the photoelectric sensor (2). The angle adjustment mechanism (3) includes a U-shaped frame (31) fixedly installed on the upper side wall of the substrate (1). A rotating shaft (32) is rotatably installed on the side of the U-shaped frame (31) near the placement plate (11). A roller (33) is coaxially fixedly installed at the middle position of the rotating shaft (32). An extension rod is fixedly connected to the circumferential side wall of the roller (33). 34), the photoelectric sensor (2) is fixedly installed on the extension rod (34), and toothed grooves (331) are provided at the edges of both ends of the roller (33). Two clamping plates (35) are symmetrically and horizontally slidably arranged inside the U-shaped frame (31). Crown gears (352) are fixedly installed on the opposite side of the two clamping plates (35) at the positions corresponding to the toothed grooves (331). An adjusting component (36) for adjusting the distance between the two clamping plates (35) is provided on the U-shaped frame (31). When the adjusting component (36) drives the two clamping plates (35) to approach each other, the crown gears (352) mesh with the corresponding toothed grooves (331).

2. The limit fixture for detecting drive motors in automatic vending machines according to claim 1, characterized in that: The placement plate (11) is provided with four blocks (12) around its perimeter, and the blocks (12) are fixedly installed on the upper side wall of the base plate (1).

3. The limit fixture for detecting drive motors in automatic vending machines according to claim 1, characterized in that: A circular groove (351) is coaxially formed on the clamping plate (35) at a position corresponding to the rotating shaft (32). The inner diameter of the circular groove (351) is larger than the outer diameter of the rotating shaft (32), and the rotating shaft (32) is located inside the circular groove (351).

4. The limit fixture for detecting drive motors in automatic vending machines according to claim 1, characterized in that: The adjusting assembly (36) includes two guide rods (361) that are horizontally fixed inside the U-shaped frame (31). The clamping plate (35) is slidably sleeved on the two guide rods (361). A return spring (362) sleeved on the guide rod (361) is fixedly connected between the clamping plate (35) and the inner wall of the U-shaped frame (31). The return spring (362) pushes the two clamping plates (35) closer to each other.

5. The limit fixture for detecting drive motors in automatic vending machines according to claim 4, characterized in that: The adjustable distance assembly (36) also includes a cover plate (364) fixedly installed on the upper side wall of the U-shaped frame (31). A movable plate (367) is slidably provided through the middle position of the cover plate (364). A wheel frame (365) is fixedly connected to the lower end of the movable plate (367). Rollers (366) are rotatably installed at both ends of the wheel frame (365).

6. The limit fixture for detecting drive motors in automatic vending machines according to claim 5, characterized in that: The upper sidewall of the clamping plate (35) and the position corresponding to the roller (366) are fixedly connected with wedges (363). The sides of the two wedges (363) that are close to each other are set as inclined surfaces, and the roller (366) contacts the inclined surface of the corresponding wedge (363).

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