A device for flipping a coin-like object over on its front and back sides

Abstract

The present invention relates to a device for turning over the front and back sides of coin-like objects, which comprises a cam plate, a driven bearing and a turning-over mechanism. The cam plate has an outwardly convex curved surface, and the outer ring of the driven bearing can cooperate with the outwardly convex curved surface of the cam plate. The driven bearing is installed on the turning plate of the turning-over mechanism and can move along the outwardly convex curved surface of the cam plate. When the driven bearing moves on the outwardly convex curved surface, it drives the turning plate of the turning-over mechanism to rotate, so that the coins placed on the turning plate are turned over. The turning-over mechanism is arranged on a moving part and can move along with the moving part. The advantages of the present invention are that it realizes the lossless transmission and reliable turning-over of coins, and the self-adaptability range of the turning-over device is wider. It is not only effective for circular coins, but also has the same reliability for other types of special-shaped coins such as polygons.

Description

Technical Field

[0001] The present invention belongs to the technical field of coin-making equipment, and particularly relates to a front and back flipping device for coin-like objects. Background Art

[0002] It is understood that the existing coin flipping devices are divided into two major categories according to whether they flip the coin by clamping it. One category is the device that flips the coin by clamping it with a belt, mainly including the clamping and conveying flipping, such as CN2003101063847 and CN2020202760772, and the figure-eight conveying flipping, such as CN2012100631071. Both of these two types of flipping devices need to clamp the coin with a conveying belt to flip it, which is likely to damage the surface of the coin. The other category is the device that does not need to clamp the coin with a belt to flip it, mainly including the slideway-type flipping device with the patent number CN2012204946894, the belt-type non-pressure flipping device with the patent number CN2013103991660, and the power flipping device with the patent number 2017208455184. These flipping devices can avoid damaging the surface of the coin. However, although the above coin flipping devices can also complete the reliable flipping of the coin, the position of the coin after flipping is uncontrollable, and the belt in these devices is easily contaminated by dust after long-term operation, and there is a risk of abrasion and secondary pollution to the surface of the coin when conveying the coin. Therefore, the existing coin flipping devices cannot be well used in the surface quality detection system of coin-like products to cooperate with the visual detection part arranged on the annular track module to complete the quality detection of the front and back sides of the coin. Summary of the Invention

[0003] The purpose of the present invention is to provide a front and back flipping device for coin-like objects in view of the defect of easy abrasion and secondary pollution to the coin existing in the prior art.

[0004] To achieve the above purpose, the present invention provides a front and back flipping device for coin-like objects, including a cam plate, a driven bearing, and a flipping mechanism. The cam plate has a convex outer surface, the outer ring of the driven bearing can cooperate with the convex outer surface of the cam plate, the driven bearing is installed on the flipping plate of the flipping mechanism and can move along the convex outer surface of the cam plate. When the driven bearing moves on the convex outer surface, it drives the flipping plate of the flipping mechanism to rotate around the center of the rotating shaft, so that the coin placed on the flipping plate is flipped; the flipping mechanism is arranged on the moving part and can move with the moving part.

[0005] The present invention is a mechanical device for flipping the front and back sides of coin-like objects, which realizes coin flipping by using the mechanical principle of the cam structure. The present invention cooperates with each other through the cam plate, the driven bearing, and the moving part to flip the flipping mechanism moving to the cam plate, so as to flip the coin accurately and without damage.

[0006] Preferably, the turning-over mechanism is arranged on a carrier cart that can move along an annular track and can move with the carrier cart, and the cam plate is arranged on one side of the annular track.

[0007] For the carrier cart with the above structure, the turning-over mechanism is transported to the position of the cam plate and continues to move forward with the turning-over mechanism, so that the driven bearing connected to the turning plate of the turning-over mechanism moves along the contour line of the cam plate, and then drives the turning plate to turn over, realizing the turning-over of the coin.

[0008] Preferably, the turning-over mechanism is composed of a left turning plate and a right turning plate. The left turning plate and the right turning plate are rotationally connected through a rotating shaft. One of the left turning plate and the right turning plate is provided with a driven shaft, and the driven bearing is sleeved on the driven shaft and can rotate around the driven shaft.

[0009] In this way, the driven bearing installed on the turning-over mechanism rotates and moves forward along the contour line of the cam plate under the drive of the carrier cart, and one of the left and right turning plates connected to the driven bearing is lifted upward accordingly to complete the turning-over action.

[0010] Preferably, the cam plate is installed on a height adjusting mechanism, and the installation height of the cam plate is adjusted by the height adjusting mechanism; the height adjusting mechanism includes a column, a slider, a spring and an adjusting plate. The adjusting plate, the spring and the slider are sleeved on the column from bottom to top in sequence, and the slider is connected with the cam plate.

[0011] The height adjusting mechanism with the above structure can realize the adjustment of the installation height of the cam plate. Specifically, by adjusting the position of the adjusting plate, the installation positions of the spring and the slider are adjusted, and then the installation height of the cam plate is adjusted. The installation height of the cam plate takes the situation that the driven bearing is tangent to the highest point of the cam plate when the turning plate turns over 90° as the height reference. During the turning-over process of the turning plate, the spring is used to form an elastic support and plays the role of absorbing energy and releasing energy. When the driven bearing passes through the spring position of the cam plate, the spring is compressed. The spring can avoid rigid impact by absorbing energy. After the driven bearing leaves the spring position of the cam plate, the spring can be converted into the kinetic energy of the right turning plate rotating by releasing energy.

[0012] Preferably, the lower end of the column is fixedly connected with the base, the adjusting plate and the column form a vertically slidable connection through a rotating adjusting column, and the slider is slidably connected with the column; a limiting and fixing block is arranged on the column above the slider.

[0013] In this way, the adjusting plate and the slider are slidably connected with the column, and the adjusting plate and the adjusting column are connected by threads. It is convenient to fix the adjusting plate after it is rotated to an appropriate position of the adjusting column. Rotating the adjusting column can control the installation position of the adjusting plate, and then realize the fine adjustment of the slider downward, so that the running rotation angle of the turning plate is greater than 95°, ensuring that the coin can complete the turning-over action smoothly.

[0014] Preferably, the height adjustment mechanism is divided into left and right parts. Each part includes a column and a limit fixing block, a slider, a spring, an adjustment plate and a base that are sleeved on the column from top to bottom in sequence. One of the left and right limit fixing blocks is provided with a stop rod for resetting one of the left and right flap plates.

[0015] Preferably, the contour line of the convex curved surface is composed of two symmetric left and right line segments, and the line segment needs to meet the following constraint conditions:

[0016]

[0017] Wherein, x is the horizontal movement range of the flap plate, and H is the height of the cam plate (i.e., the vertical distance between the highest point and the lowest point of the cam plate);

[0018] The height of the cam plate needs to meet the following constraint conditions:

[0019]

[0020] Wherein, R is the rotation radius of the flap plate, and D is the diameter of the driven bearing;

[0021] The installation height of the cam plate satisfies: when the right flap plate is flipped 90°, the highest point of the cam plate is tangent to the driven bearing as the height reference. On this basis, the installation height of the cam plate can be finely adjusted by the adjusting column. To reduce the vibration caused by sudden load changes, it is finely adjusted downward by 0.5 - 1 mm based on the reference height.

[0022] With the above design, the contour line of the cam plate satisfies the formula f(x). On the one hand, under the working conditions of low speed and light load, it meets the requirements of the structural design, that is, it is required to complete the flipping of the coin within a 300 - mm stroke range; on the other hand, it can ensure that the right flap plate realizes a constant - speed movement to prevent the influence of speed fluctuations on the position of the coin; the height design formula of the cam plate is to ensure that the flipping angle range of the right flap plate can include 0 - 90°. At the same time, the vertical distance between the highest point and the lowest point of the cam plate is not less than the rotation radius of the flap plate, and the right flap plate realizes a constant - speed motion law, so that the coin set on the flap plate can be successfully flipped, and the position of the coin after flipping meets the preset requirements and will not slide out of the flap plate. The installation height of the cam plate can be adjusted up and down through the lifting adjustment mechanism. The installation height of the cam plate can be finely adjusted downward within the range of 0.5 - 1 mm, resulting in the running rotation angle of the flap plate being greater than 95°, ensuring that the coin can successfully complete the flipping action.

[0023] Preferably, the rotation angle of the flap plate needs to meet the following conditions:

[0024]

[0025] In the formula, x is the horizontal movement range of the flap plate, H is the height of the cam plate, and R is the rotation radius of the flap plate.

[0026] The above formula design is to meet the requirement that within the design stroke of 300 mm, the flap rotation angle can cover the range of 0 to 90°, which ensures the working stroke of the flap.

[0027] Preferably, the upper contour line of the cam plate is composed of two connected straight line segments. The slope of the right - hand lift straight line segment is The slope of the left - hand return straight line segment is

[0028] Preferably, a layer of rubber pad is respectively provided on the surfaces of the left flap and the right flap. The convex part of the right flap is pivotally connected to both sides of the groove of the left flap through a rotating shaft, and a limiting step for preventing coins from slipping is provided in the groove of the left flap.

[0029] The advantages of the present invention are that it realizes the non - destructive transmission and reliable flipping of coins, and the adaptability range of this flipping device is wider. It is effective not only for circular coins but also for other types of special - shaped coins such as polygons with the same reliability. Brief Description of the Drawings

[0030] The present invention will be further described below with reference to the accompanying drawings.

[0031] Figure 1 It is a schematic structural diagram of the present invention.

[0032] Figure 2 It is the front view of the present invention.

[0033] Figure 3 It is the rear view of the present invention.

[0034] Figure 4 It is the side view of the present invention.

[0035] Figure 5 It is the top view of the present invention.

[0036] Figure 6 It is the top view when the flipping device in the present invention is installed.

[0037] Figure 7 It is the front view when the flipping device in the present invention is installed.

[0038] Figure 8 It is the left view when the flipping device in the present invention is installed.

[0039] Figure 9 It is Figure 7 The A - A sectional view of

[0040] Figure 10 It is the drawing of the contour line of the cam plate in the present invention.

[0041] Figure 11 It is the X-θ curve graph of the flap rotation angle in the present invention.

[0042] In the figure: 1. Cam plate, 2. Driven bearing, 3. Driven shaft, 4. Coin, 5. Right flap, 6. Left flap, 7. Stop lever, 8. Column, 9. Limit fixing block, 10. Slide block, 11. Spring, 12. Adjusting plate, 13. Base, 14. Bottom plate, 15. Adjusting column, 17. Ring track, 18. Carrier trolley, 19. Driving motor, 20. Driving wheel, 21. Driven wheel, 22. Ring conveyor belt, 23. T-shaped connecting block, 24. Substrate. Specific implementation mode

[0043] Embodiment 1

[0044] As Figures 1 to 5 shown, a front-back flipping device for coin-like objects includes a cam plate 1, a driven bearing 2, a flipping mechanism and a height adjusting mechanism. The upper end of the cam plate 1 has a convex curved surface. The driven bearing 2 is connected to the right flap 5 of the flipping mechanism, and the outer ring of the driven bearing 2 can cooperate with the convex curved surface of the cam plate 1. The flipping mechanism is arranged on a carrier trolley 18 that can move along the ring track 17 and can move with the carrier trolley 18. After the cam plate 1 and the height adjusting mechanism are installed together, they are arranged at the coin flipping station of the ring track module. The ring track module includes a substrate 24, a ring track 17 installed on the substrate 24, and a carrier trolley 18 arranged on the ring track 17 and moving along the ring track 17. The carrier trolley 18 is driven by a driving motor 19 installed on the substrate 24. The output end of the driving motor 19 is connected to a driving wheel 20. The driving wheel 20 is connected to three driven wheels 21 installed on the substrate 24 through a ring conveyor belt 22. A group of uniformly distributed T-shaped connecting blocks 23 are arranged on the outer side of the ring conveyor belt 22. The ring conveyor belt 22 is connected to the carrier trolley 18 through the T-shaped connecting blocks 23 (see Figures 6 to 9) When the drive motor 19 works, it drives the driving wheel 20 to rotate. The driving wheel 20 drives the driven wheel 21 to rotate through the annular conveyor belt 22. When the annular conveyor belt 22 rotates, it drives the carrier trolley 18 to move along the annular track 17 through the T-shaped connecting block 23. Among them, the turning-over mechanism is composed of a left turning plate 6 and a right turning plate 5. The left turning plate 6 and the right turning plate 5 are rotationally connected through a rotating shaft. A driven shaft 3 is provided on the outer side of the right turning plate 5. The driven bearing 2 is sleeved on the driven shaft 3 and can rotate around the driven shaft 3. A groove is provided on one side of the left turning plate 6, and a protrusion portion matching the groove is provided on one side of the right turning plate 5. A laterally penetrating through hole is made in the protrusion portion of the right turning plate 5, and the rotating shaft is in interference fit with the through hole. Axial holes with clearance fit with the end portions of the rotating shaft are made on the two side walls of the groove of the left turning plate 6. After the rotating shaft passes through the through hole of the protrusion portion, it is installed in the axial holes of the groove and can rotate in the axial holes. This enables the protrusion portion of the right turning plate 5 to be pivotally connected to the two sides of the groove of the left turning plate 6 through the rotating shaft. A limiting step for preventing the coin 4 from slipping is also provided in the groove of the left turning plate 6. A layer of rubber pad is provided on the surfaces of the left turning plate 6 and the right turning plate 5, which can increase the contact friction force of the coin 4 and prevent the coin 4 from slipping out of the left turning plate 6 after being turned over. When the turning device works, the carrier trolley 18 moves along the annular track 17, transports the turning-over mechanism to the coin turning-over station of the annular track module. Driven by the carrier trolley 18, the driven bearing 2 connected to the right turning plate 5 moves along the convex curved surface of the cam plate 1, so that when the driven bearing 2 moves on the convex curved surface of the cam plate 1, the right turning plate 5 rotates around the center of the rotating shaft under the action of the outer contour line of the cam plate 1, driving the coin 4 placed on the right turning plate 5 to rotate accordingly, realizing the flipping of the front and back sides of the coin 4 to the left turning plate 6 and completing the coin 4 turning-over action.

[0045] The cam plate 1 is installed on the height adjustment mechanism, and the installation height of the cam plate 1 is adjusted by the height adjustment mechanism. The height adjustment mechanism is divided into left and right parts, and each part includes a column 8 and a limit fixing block 9, a slider 10, a spring 11, an adjustment plate 12 and a base 13 that are sleeved on the column 8 from top to bottom in sequence. The slider 10 is fixedly connected to the cam plate 1 and is slidably connected to the column 8. The slider 10 can move up and down along the column 8, and the installation position of the cam plate 1 can be adjusted by driving the cam plate 1 to move up and down along the column 8 with the slider 10. A spring 11 is arranged below the slider 10. The spring 11 is used to form an elastic support and play a role in absorbing and releasing energy. It can not only avoid rigid impact, but also provide kinetic energy for the rotation of the right flap 5. A stop lever 7 is arranged on the limit fixing block 9 of the left height adjustment mechanism to block the flipped right flap 5 and make it reset when it reaches this position. Usually, there is a certain distance between the limit fixing block 9 and the slider 10 of the left height adjustment mechanism, and this limit fixing block 9 is used to install the baffle 7; there is no gap between the limit fixing block 9 and the slider 10 of the right height adjustment mechanism, and this limit fixing block 9 directly abuts against the upper surface of the slider 10 to limit the position of the slider 10. The adjustment plate 12 is a rectangular plate, and through holes that can cooperate with the lower part of the column 8 are respectively made on the left and right sides thereof, and a through hole that can cooperate with the adjustment column 15 is made in the middle. The column 8 and the adjustment column 15 respectively pass through the through holes on the adjustment plate 12 and are installed in the base 13. Among them, the lower ends of the column 8 and the adjustment column 15 are fixedly connected to the base 13, and the adjustment plate 12 and the column 8 form a slidable connection up and down by rotating the adjustment column 15. The upper part of the adjustment column 15 has an external thread, so that the adjustment plate 12 is threadedly connected to the adjustment column 15. The adjustment plate 12 is slidably connected to the column 8. Rotating the adjustment column 15 can move the adjustment plate 12 up and down so that it moves up and down along the column 8 and the adjustment column 15 to reach a suitable position, and then the installation height of the slider 10 is adjusted through the adjustment plate 12, and finally the purpose of adjusting the installation height of the cam plate 1 is achieved. The base 13 is installed on the bottom plate 14, and the bottom plate 14 is installed on the frame of the coin product surface quality detection system and is close to the substrate 24.

[0046] The length of the coin flipping station (i.e., the sum of the widths of the left and right flaps) is denoted as L, L = 300, the flipping radius of the flap is denoted as R, R = 40, the diameter of the driven bearing 2 is denoted as D, D = 8, and the horizontal movement range of the flap is denoted as x, and the value of x is [-150, 150]. The above units are all mm. The vertical distance between the highest point and the lowest point of the cam plate 1 is not less than the rotation radius of the right flap 5, that is, the height H of the cam plate 1 (i.e., the vertical distance between the highest point and the lowest point of the cam plate) needs to satisfy the following constraint conditions:

[0047]

[0048] Generally, for a compact design, the value of H is taken as 40.

[0049] The contour line of the convex outer surface of the cam plate is composed of a lift contour line and a return contour line that are symmetric about the left and right, so that the right flap is uniformly linearly stressed. As Figure 10 shown, the lift contour line needs to meet the following constraint conditions:

[0050]

[0051] The return contour line needs to meet the following constraint conditions:

[0052]

[0053] In addition, the installation height of the cam plate 1 needs to meet the following conditions: When the right flap 5 rotates 90°, the driven bearing 2 is tangent to the highest point of the cam plate as the height reference. On this basis, the installation height of the cam plate 1 can be finely adjusted through the adjusting column 15. Rotate the adjusting column 15 to move the adjusting plate 12 up and down so that it moves up and down along the column 8 and the adjusting column 15 to reach the appropriate position, and then the installation height of the slider 10 can be adjusted through the adjusting plate 12, thereby adjusting the installation height of the cam plate 1. To reduce the vibration caused by sudden load changes, fine-tune it downward by 0.5 - 1 mm based on the reference height, so that the running rotation angle of the right flap 5 is greater than 95°, which can ensure that the coin 4 is successfully turned over and will not slide out of the left flap 6.

[0054] As Figure 11 shown, the rotation angle of the right flap 5 conforms to the x-θ curve. When the right flap 5 is in the lift stage, the curve needs to meet the following conditions:

[0055]

[0056] When the right flap 5 is in the return stage, the curve needs to meet the following conditions:

[0057]

[0058] In addition, the return contour line and the lift contour line each consist of a straight line segment. The slope of the straight line segment of the right-end lift contour line is The slope of the straight line segment of the left-end return contour line is

[0059] When the flipping device of this embodiment is in the initial position, the cam plate 1 and the height adjustment mechanism are fixed, the left flip plate 6 and the right flip plate 5 are installed on the carrying trolley 18 on the circular track 17, and can move with the carrying trolley 18. At the same time, the left flip plate 6 is relatively fixed, and the right flip plate 5 can rotate with the center of the rotating shaft. At this time, the coin 4 is placed on the right flip plate 5. The transport trolley 18 moves, and the left flap 6 and the right flap 5 move with it on the transport trolley 18. When the driven bearing 2 contacts the upper convex surface of the cam plate 1, the right flap 5 is lifted according to the law of the contour curve of the cam plate 1, so that it rotates around the center of the rotating shaft. When the cam plate 1 is at the highest point, the right flap 5 rotates to the maximum angle (greater than 90°), and the coin 4 rotates with the right flap 5 by an angle greater than 90°. Then, under the action of gravity, the coin 4 continues to flip in the direction of the angle greater than 90°, and finally achieves a 180° flip under the action of inertia and gravity. The coin 4 flips 180° from the right flap 5 to the left flap 6. After the driven bearing 2 passes the highest point of the cam plate 1, the right flap 5 continues to move along the contour line of the cam plate 1, and returns to its original position along the return outer contour line of the cam plate 1 under the action of the stop rod 7. In this way, the flip mechanism repeats the above process after rotating around the circular track 17 for a cycle, and performs a repetitive motion cycle.

[0060] During the flipping process of coin 4, to ensure that coin 4 is successfully flipped, the device of this embodiment must meet the following conditions: (1) the linear speed of the flip plate does not exceed 17 m / min; (2) the rotation angle of the right flip plate 5 is not less than 95° (this rotation angle can be ensured by adjusting the installation height of the cam plate 1); (3) after the coin 4 rotates 95° with the limit step as the rotation center, it continues to rotate under the action of gravity and inertia until it falls on the left flip plate and stops, at which point the coin completes a 180° flip.

[0061] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A device for flipping the front and back sides of coin-like objects, Characterized in that: It includes a cam plate, a driven bearing and a flipping mechanism. The cam plate has a convex outer surface. The outer ring of the driven bearing can cooperate with the convex outer surface of the cam plate. The driven bearing is installed on the flipping plate of the flipping mechanism and can move along the convex outer surface of the cam plate. When the driven bearing moves on the convex outer surface, it drives the flipping plate of the flipping mechanism to rotate, so that the coin placed on the flipping plate is flipped; the flipping mechanism is arranged on the moving part and can move with the moving part; the contour line of the convex outer surface is composed of two left-right symmetrical line segments, and this line segment needs to meet the following constraint conditions: f(x)=± x + H Where x is the horizontal movement range of the flipping plate, and H is the height of the cam plate; The height of the cam plate needs to meet the following constraint conditions: H≥R - wherein, R is the rotation radius of the flap, and D is the diameter of the driven bearing; The installation height of the cam plate meets: when the right flipping plate flips 90°, the tangent point of the driven bearing and the highest point of the cam plate is used as the height reference. On this basis, the installation height of the cam plate can be finely adjusted by the adjustment column. To reduce the vibration caused by sudden load changes, it is finely adjusted downward by 0.5 - 1 mm on the basis of the reference height.

2. The device for flipping the front and back sides of coin-like objects according to claim 1, Characterized in that: The flipping mechanism is arranged on a carrier cart that can move along an annular track and can move with the carrier cart. The cam plate is arranged on one side of the annular track.

3. The device for flipping the front and back sides of coin-like objects according to claim 1, Characterized in that: The flipping mechanism is composed of a left flipping plate and a right flipping plate. The left flipping plate is rotatably connected to the right flipping plate. One of the left flipping plate and the right flipping plate is provided with a driven shaft, and the driven bearing is sleeved on the driven shaft and can rotate around the driven shaft.

4. The device for flipping the front and back sides of coin-like objects according to claim 1, Characterized in that: The cam plate is installed on a height adjustment mechanism, and the installation height of the cam plate is adjusted by the height adjustment mechanism; the height adjustment mechanism includes a column, a slider, a spring and an adjustment plate. The adjustment plate, spring and slider are sleeved on the column from bottom to top in sequence, and the slider is connected to the cam plate.

5. The device for flipping the front and back sides of coin-like objects according to claim 4, Characterized in that: The lower end of the column is fixedly connected to the base. The adjustment plate is slidably connected to the column, and the slider is slidably connected to the column; a limit fixing block is provided on the column above the slider.

6. The device for flipping the front and back sides of coin-like objects according to claim 5, Characterized in that: The height adjustment mechanism is divided into left and right parts. Each part includes a column and a limit fixing block, a slider, a spring, an adjustment plate and a base that are sleeved on the column from top to bottom in sequence. One of the left and right limit fixing blocks is provided with a stop rod.

7. The device for flipping the front and back sides of coin-like objects according to claim 1, Characterized in that, The rotation angle of the flipping plate needs to meet the following conditions: Wherein, x is the horizontal movement range of the flap, H is the height of the cam plate, and R is the rotation radius of the flap.

8. The device for flipping the front and back sides of coin-like objects according to claim 1, Characterized in that, The upper contour line of the cam plate consists of two connected straight line segments. The slope of the straight line segment for the lift at the right end is , and the slope of the straight line segment for the return at the left end is .

9. The device for flipping the front and back sides of coin-like objects according to claim 3, Characterized in that, A rubber pad is respectively provided on the surfaces of the left flap and the right flap. The convex part of the right flap is pivotally connected to the groove of the left flap through a rotating shaft, and a limiting step for preventing coins from slipping is provided in the groove of the left flap.

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