Variable pitch star wheel and conveyor
By using a variable pitch star disk design, the dynamic switching of pitch solves the problems of liquid sloshing and impact caused by a fixed pitch star disk, achieving stable delivery and efficient detection, and adapting to the needs of products with multiple specifications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 上海思策恒新智能科技有限公司
- Filing Date
- 2025-05-27
- Publication Date
- 2026-05-29
AI Technical Summary
In existing technologies, the fixed pitch of the star disk causes liquid sloshing, resulting in bubbles or product impact when testing products of different specifications, which affects the stability of test results and production efficiency.
Design a variable pitch star disk that achieves dynamic switching between different pitches through a cam disk and star disk gear assembly. It utilizes the large pitch area for stable conveying and the small pitch area to adapt to the detection turntable. Combined with elastic tooth ends and bushing structure, it ensures product stability and equipment compatibility.
It improves equipment stability, testing efficiency, and production efficiency, reduces impact force and bottle breakage rate, and adapts to the testing needs of products with multiple specifications.
Smart Images
Figure CN224298074U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of conveying equipment technology, and more specifically, it relates to a variable pitch star disk and a conveying device. Background Technology
[0002] When testing water-based injection products with pharmaceutical testing equipment, a combination of auger and star plate is often used. The product to be tested is transported from the auger to the star plate, and then transferred from the star plate to the testing turntable. After the test is completed, the product is transferred from the star plate back to the auger to complete the cycle.
[0003] Because the pitch on the star disk is a fixed value, and the pitches of the auger, star disk, and detection turntable are consistent, if the pitch of the star disk is too small when inspecting products of different specifications, the liquid inside the auger will easily slosh and generate air bubbles when the auger transports the product, affecting the stability of the test results and the testing efficiency. If the pitch of the star disk is too large, the production speed will increase when the product enters the auger after inspection, leading to collisions, especially for ampoule bottles, which can easily cause bottle breakage and secondary contamination, affecting production efficiency. Utility Model Content
[0004] The purpose of this invention is to provide a variable pitch star disk with different pitch sizes. When connected to the auger, the small pitch area is used to ensure the stability of the product being inspected and reduce the impact force. When connected to the testing turntable, the large pitch area is used to ensure equipment compatibility, thereby improving equipment stability, testing efficiency and production efficiency.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a variable pitch star disk, comprising:
[0006] A mounting bracket is provided, on which a drive shaft is rotatably mounted, and a power disc is provided at the upper end of the drive shaft;
[0007] A cam disk is mounted on the power disk. The cam disk has a circular arc mounting area and a straight mounting area connected end to end in the circumference. The circular arc mounting area and the cam disk are concentrically arranged. The length of the perpendicular line between the center of the straight mounting area and the center of the circular arc mounting area is less than the radius of the circular arc mounting area.
[0008] A star disk tooth assembly includes multiple star disk teeth respectively installed on the arc mounting area and the straight mounting area. Each star disk tooth has an arc-shaped adapter groove at one outer end. The multiple star disk teeth located in the arc mounting area are arranged sequentially along the trajectory direction of the arc mounting area, and the multiple star disk teeth located in the straight mounting area are arranged sequentially along the trajectory direction of the straight mounting area.
[0009] In one possible implementation, the multiple star disk teeth located in the arc mounting area are arranged at equal intervals, and the multiple star disk teeth located in the straight mounting area are arranged in sequence and fitted together.
[0010] In one possible implementation, a plurality of the star disk teeth are mounted between the cam disk and the power disk.
[0011] In one possible implementation, the star disk tooth includes a fixed end and a tooth end, the fixed end being mounted between the cam disk and the power disk, the tooth end being connected to the outside of the fixed end and extending to the outside of the cam disk, and the arcuate adapter groove being located at one end of the outer side of the tooth end.
[0012] In one possible implementation, the upper end of the fixed end is connected to the lower end face of the cam disk, and the lower end of the fixed end is snapped onto the upper end of the power disk.
[0013] In one possible implementation, a bushing is fitted around the outside of the drive shaft, and a flange for connecting the power disc is provided at the upper end of the bushing.
[0014] In one possible implementation, a fixed mandrel is axially inserted through the inner cavity of the drive shaft, and the upper end of the fixed mandrel extends above the drive shaft and is fixedly connected to the cam disk.
[0015] In one possible implementation, the upper end of the cam disc is provided with a pressure cap and a handle bolt, the handle bolt passing through the pressure cap and connected to the upper end of the fixed mandrel.
[0016] In one possible implementation, a bearing is provided at the top of the inner cavity of the drive shaft, and the fixed spindle is rotatably engaged with the drive shaft through the bearing.
[0017] The beneficial effects of the variable pitch star disk provided by this utility model are as follows: Compared with the prior art, a first pitch is formed between two adjacent star disk teeth on the arc mounting area, and a second pitch is formed between two adjacent star disk teeth on the straight mounting area. Since the arc mounting area and the straight mounting area are connected end to end, and the arc mounting area and the cam disk are concentrically set, the length of the perpendicular line between the center of the straight mounting area and the center of the arc mounting area is less than the radius of the arc mounting area. Therefore, the first pitch will be larger than the second pitch. At this time, the area where the first pitch is located is the large pitch area, and the area where the second pitch is located is the small pitch area. The variable pitch star disk provided by this utility model utilizes the large pitch area when connecting with the auger to ensure the stability of the conveying of the product to be inspected and reduce the impact force. When connecting with the detection turntable, it utilizes the small pitch area to ensure equipment compatibility, thereby improving equipment stability, detection efficiency, and production efficiency.
[0018] This utility model also provides a conveying device, including the aforementioned variable pitch star disk.
[0019] The beneficial effects of the conveying device provided by this utility model are as follows: compared with the prior art, since the conveying device uses the above-mentioned variable pitch star disk, it has the same beneficial effects as the variable pitch star disk, which will not be repeated here. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0021] Figure 1 A schematic diagram of the conveying device provided by this utility model;
[0022] Figure 2 for Figure 1 Sectional view along the middle AA;
[0023] Figure 3 A schematic diagram of the variable pitch star disk provided by this utility model.
[0024] In the diagram: 1. Mounting bearing; 2. Drive shaft; 3. Bushing; 4. Flange; 5. Power disc; 6. Cam disc; 601. Circular arc mounting area; 602. Linear mounting area; 7. Star disc gear; 701. Fixed end; 702. Gear end; 8. Fixed mandrel; 9. Pressure cap; 10. Hand bolt; 11. Input auger; 12. Transition star disc; 13. Detection turntable; 14. Output auger. Detailed Implementation
[0025] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0026] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.
[0027] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.
[0028] Please see Figures 1 to 3 The present invention will now describe a variable pitch star disk. A variable pitch star disk includes a mounting seat 1, a cam disk 6, and a star disk gear assembly. A drive shaft 2 is rotatably mounted on the mounting base 1, and a power disk 5 is mounted on the upper end of the drive shaft 2. A cam disk 6 is mounted on the power disk 5. The cam disk 6 has an arc mounting area 601 and a straight mounting area 602 connected end to end in the circumference. The arc mounting area 601 and the cam disk 6 are concentric. The length of the perpendicular line between the center of the straight mounting area 602 and the center of the arc mounting area 601 is less than the radius of the arc mounting area 601. The star disk gear assembly includes multiple star disk teeth 7 respectively mounted on the arc mounting area 601 and the straight mounting area 602. Each star disk tooth 7 has an arc-shaped adapter groove at one outer end. The multiple star disk teeth 7 located in the arc mounting area 601 are arranged sequentially along the trajectory direction of the arc mounting area 601, and the multiple star disk teeth 7 located in the straight mounting area 602 are arranged sequentially along the trajectory direction of the straight mounting area 602.
[0029] This utility model provides a variable pitch star disk. Compared with the prior art, a first pitch is formed between two adjacent star disk teeth 7 on the arc mounting area 601, and a second pitch is formed between two adjacent star disk teeth 7 on the straight mounting area 602. Since the arc mounting area 601 and the straight mounting area 602 are connected end to end, and the arc mounting area 601 and the cam disk 6 are concentrically arranged, the length of the perpendicular line between the center of the straight mounting area 602 and the center of the arc mounting area 601 is less than the radius of the arc mounting area 601. Therefore, the first pitch will be larger than the second pitch. At this time, the area containing the first pitch is the large pitch area, and the area containing the second pitch is the small pitch area. This utility model provides a variable pitch star disk that utilizes the large pitch area when connecting with the auger to ensure the stability of the conveying of the product to be inspected and reduce the impact force. When connecting with the detection turntable 13, it utilizes the small pitch area to ensure equipment compatibility, thereby improving equipment stability, detection efficiency, and production efficiency.
[0030] Please see Figure 3Multiple star-shaped teeth 7 located in the arc mounting area 601 are evenly spaced and arranged radially along the arc mounting area 601. Multiple star-shaped teeth 7 located in the straight mounting area 602 are sequentially fitted and arranged along the perpendicular direction between the center of the straight mounting area 602 and the center of the arc mounting area 601. When connected to the auger, the fitted arrangement of the star-shaped teeth 7 in the straight mounting area 602 forms a small pitch, which can significantly reduce the impact force during the transport of the product to be inspected and avoid the formation of air bubbles due to liquid shaking, thereby improving the accuracy and stability of the test results. When connected to the testing turntable 13, the even radial arrangement of the star-shaped teeth 7 in the arc mounting area 601 forms a large pitch, which can adapt to the compatibility requirements of the testing turntable 13 for products of various specifications, ensuring that products of different sizes can be stably received and accurately tested. In addition, the cam disk 6 achieves pitch switching through the natural transition between circular arc and straight line trajectory, eliminating the need for complex mechanical structures, simplifying the transmission system and reducing the risk of failure. Meanwhile, the arc-shaped adapter groove at the outer end of the star disk tooth 7 fits the product shape, further enhancing the positioning stability of each component.
[0031] Please see Figure 1 Multiple star-shaped gears 7 are installed between the cam disk 6 and the power disk 5. By integrating the star-shaped gears 7 into the space between the cam disk 6 and the power disk 5, a compact transmission unit is formed. This unit can directly drive the star-shaped gears 7 to move synchronously through the rotation of the power disk 5, ensuring the efficiency and stability of power transmission. It can also use the contour of the cam disk 6 to control the arrangement trajectory of the star-shaped gears 7, thereby realizing the dynamic switching of the pitch.
[0032] Please see Figure 2The star-shaped gear 7 includes a fixed end 701 and a tooth end 702. The fixed end 701 is installed between the cam disk 6 and the power disk 5. The tooth end 702 is connected to the outside of the fixed end 701 and extends to the outside of the cam disk 6. An arc-shaped fitting groove is located at one end of the outer side of the tooth end 702. The fixed end 701 is clamped between the cam disk 6 and the power disk 5. It can directly obtain driving force through the rotation of the power disk 5 to ensure the transmission stability of the synchronous rotation of the star-shaped gear 7. At the same time, it can constrain the position of the fixed end 701 with the contour of the arc or straight mounting area 602 of the cam disk 6, so that the movement trajectory of the tooth end 702 strictly follows the preset pitch change path, and the pitch can be dynamically switched without additional mechanisms. The tooth end 702 extends to the outside of the cam disk 6. The arc-shaped fitting groove on its outer side can accurately fit the arc-shaped bottle body of products such as water injection bottles and ampoules awaiting inspection. While stably supporting the product, the curved transition reduces contact stress and reduces the risk of impact damage to fragile products. The layout, hidden between the cam disk 6 and the power disk 5, reduces external exposed parts and minimizes the impact of dust, liquid medicine, and other contaminants on the transmission nodes, meeting the clean environment requirements of medical testing equipment. Furthermore, the modular structure facilitates later maintenance and replacement, allowing for maintenance of the star disk teeth 7 without disassembling the entire system. When the star disk teeth 7 rotate with the cam disk 6, the fixed end 701 moves along different installation areas, causing the tooth ends 702 to change their spacing. The rigidly connected tooth ends 702, in conjunction with the fixed end 701, utilize the curvature design of the arc-shaped adapter groove to ensure the continuity of product reception during pitch switching, avoiding jamming or impact caused by sudden trajectory changes, and further improving the stability and reliability of the conveying system.
[0033] Specifically, the upper end of the fixed end 701 is connected to the lower end face of the cam disk 6 by two bolts. The inner side of the lower end of the fixed end 701 has a U-shaped notch. The upper end of the power disk 5 is provided with a locking block, which is locked in the U-shaped notch to ensure that the power disk 5 synchronously drives the star disk gear 7 to rotate.
[0034] Preferably, the toothed end 702 is made of an elastic material. When in contact with the product to be inspected (such as an ampoule), the elastic toothed end 702 can absorb the impact force during the transfer process through its own deformation, effectively mitigating rigid collisions, significantly reducing the breakage rate and the risk of secondary contamination, and is especially suitable for conveying impact-sensitive pharmaceutical products. It can adapt to the dimensional tolerances and pitch errors of different product specifications through slight deformation, ensuring stable product reception, avoiding jamming or positioning deviations, and enhancing the equipment's compatibility with multiple product specifications. The vibration absorption characteristics of the elastic material can reduce noise and vibration during high-speed rotation, optimize the smoothness of equipment operation, reduce mechanical wear, and extend the service life of core components. During pitch switching, the elastic toothed end 702 can adapt to the curvature changes of the cam disk 6 trajectory through flexible deformation, ensuring that the product maintains a stable clamping state during transition, avoiding deviation or tipping, and improving conveying accuracy. In addition, the flexibility of the elastic material can reduce the installation accuracy requirements, compensate for assembly deviations through its own deformation, reduce operational failures caused by mechanical tolerances, and is suitable for stable operation under complex conditions of high speed and high load, improving the environmental adaptability of the equipment.
[0035] Please see Figure 2 A bushing 3 is fitted around the outside of the drive shaft 2, and a flange 4 for connecting the power disk 5 is provided at the upper end of the bushing 3. The bushing 3 and the drive shaft 2 cooperate to form a rigid support, which can effectively reduce the radial runout and axial movement of the drive shaft 2 during rotation, ensure the coaxiality of the power disk 5 and the drive shaft 2, avoid pitch deviation of the star disk teeth 7 or transmission jamming due to shaft shaking, and improve the accuracy of the variable pitch star disk motion trajectory. The flange 4 connection method facilitates the quick assembly and disassembly of the power disk 5 and the bushing 3. During equipment debugging or maintenance, the power disk 5 and the star disk assembly can be disassembled separately without disassembling the entire drive shaft 2 system, simplifying the maintenance process.
[0036] In addition, a fixed mandrel 8 is axially inserted into the inner cavity of the drive shaft 2. The upper end of the fixed mandrel 8 extends above the drive shaft 2 and is fixedly connected to the cam disc 6. The upper end of the cam disc 6 is provided with a pressure cap 9 and a lever bolt 10. The lever bolt 10 passes through the pressure cap 9 and is connected to the upper end of the fixed mandrel 8. Through the threaded connection between the lever bolt 10, the pressure cap 9, and the fixed mandrel 8, the cam disc 6 can be stably pressed and fixed to the top of the fixed mandrel 8. The operator can rotate the lever bolt 10 to adjust the clamping force without tools, which ensures that the cam disc 6 remains stationary during transmission to accurately constrain the trajectory of the star disc teeth 7, and also facilitates quick disassembly and replacement of the cam disc 6 to adapt to different product specifications, improving maintenance and debugging efficiency.
[0037] The drive shaft 2 has a bearing at the top of its inner cavity, and the fixed spindle 8 rotates with the drive shaft 2 through the bearing. The drive shaft 2 can drive the star disk gear 7 to rotate under power, while the fixed spindle 8 remains stationary and fixes the cam disk 6 through the bearing, so that the movement trajectory of the star disk gear 7 is only controlled by the contour of the cam disk 6, ensuring that power transmission and pitch control do not interfere with each other, and accurately realizing the variable pitch function.
[0038] Based on the same inventive concept, this utility model also provides a conveying device that uses the aforementioned variable pitch star disk.
[0039] Please see Figure 1 The conveying device includes two variable pitch star disks, an input auger 11, an output auger 14, a detection turntable 13, and a transition star disk 12. One variable pitch star disk and the input auger 11 constitute the feeding assembly. The transition point between the input auger 11 and the variable pitch star disk is located in the small pitch region of the variable pitch star disk, ensuring that the product enters the variable pitch star disk more stably from the input auger 11. After the product enters the variable pitch star disk, the pitch of the variable pitch star disk increases to facilitate the transition with the detection turntable 13. The larger pitch here can accommodate more specifications of products to meet their testing requirements. The product enters the other variable pitch star disk from the detection turntable 13 via the transition star disk 12. When the variable pitch star disk is in the transition with the output auger 14, its pitch decreases again to ensure the stability of the transition. At the same time, the smaller pitch here can also reduce the impact between products to avoid secondary damage to the products.
[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A variable pitch star disk, characterized in that, include: Mounting bearing (1), on which a drive shaft (2) is rotatably mounted, and at the upper end of the drive shaft (2) is a power disc (5); A cam disk (6) is mounted on the power disk (5). The cam disk (6) has a circular arc mounting area (601) and a straight mounting area (602) connected end to end in the circumference. The circular arc mounting area (601) and the cam disk (6) are concentrically arranged. The length of the perpendicular line between the center of the straight mounting area (602) and the center of the circular arc mounting area (601) is less than the radius of the circular arc mounting area (601). The star disk tooth assembly includes a plurality of star disk teeth (7) respectively installed on the arc mounting area (601) and the straight mounting area (602). Each star disk tooth (7) has an arc-shaped adapter groove at one outer end. The plurality of star disk teeth (7) located in the arc mounting area (601) are arranged sequentially along the trajectory direction of the arc mounting area (601), and the plurality of star disk teeth (7) located in the straight mounting area (602) are arranged sequentially along the trajectory direction of the straight mounting area (602).
2. A variable pitch star disk as described in claim 1, characterized in that, The multiple star disk teeth (7) located in the arc mounting area (601) are arranged at equal intervals, and the multiple star disk teeth (7) located in the straight mounting area (602) are arranged in sequence.
3. A variable pitch star disk as described in claim 2, characterized in that, Multiple of the star disk teeth (7) are installed between the cam disk (6) and the power disk (5).
4. A variable pitch star disk as described in claim 3, characterized in that, The star disk tooth (7) includes a fixed end (701) and a tooth end (702). The fixed end (701) is installed between the cam disk (6) and the power disk (5). The tooth end (702) is connected to the outside of the fixed end (701) and extends to the outside of the cam disk (6). The arc-shaped adapter groove is located at one end of the outer side of the tooth end (702).
5. A variable pitch star disk as described in claim 4, characterized in that, The upper end of the fixed end (701) is connected to the lower end face of the cam disk (6), and the lower end of the fixed end (701) is clamped to the upper end of the power disk (5).
6. A variable pitch star disk as described in claim 1, characterized in that, The drive shaft (2) is fitted with a bushing (3), and the upper end of the bushing (3) is provided with a flange (4) for connecting the power disc (5).
7. A variable pitch star disk as described in claim 1, characterized in that, A fixed mandrel (8) is axially inserted through the inner cavity of the drive shaft (2), and the upper end of the fixed mandrel (8) extends above the drive shaft (2) and is fixedly connected to the cam disk (6).
8. A variable pitch star disk as described in claim 7, characterized in that, The upper end of the cam disc (6) is provided with a pressure cap (9) and a handle bolt (10), the handle bolt (10) passes through the pressure cap (9) and is connected to the upper end of the fixed spindle (8).
9. A variable pitch star disk as described in claim 8, characterized in that, The top of the inner cavity of the drive shaft (2) is provided with a bearing component, and the fixed spindle (8) is rotatably engaged with the drive shaft (2) through the bearing component.
10. A conveying device, characterized in that, Including the variable pitch star disk as described in any one of claims 1-8.