A tablet friability testing institution

Abstract

This invention provides a tablet friability testing mechanism, including a base plate, a fixing plate fixedly installed on one side of the top of the base plate, a housing fixedly installed on one side of the fixing plate, a servo motor fixedly installed inside the housing, and a drive shaft fixedly installed at the output end of the servo motor. Compared with the prior art, this invention has the following advantages: by using four baffles evenly distributed on the inner ring surface of the drum, the movement trajectory of the tablet is cleverly changed when the drum rotates, so that the tablet and the inner wall of the drum, other tablets, and baffles fully rub and collide, realistically simulating the mechanical stress that tablets may encounter during production, transportation, and storage. At the same time, it avoids excessive centrifugal force on the tablet when the drum rotates, preventing invalid detection. By accurately simulating actual working conditions, the friability of tablets can be detected more accurately, providing more reliable data for drug quality assessment.

Description

Technical Field

[0001] This utility model is a tablet friability testing device, belonging to the field of pharmaceutical testing equipment. Background Technology

[0002] In the pharmaceutical manufacturing process, tablets are a common dosage form, and their quality is crucial to medication safety and efficacy. Tablet fragility is one of the important indicators for measuring tablet quality. It reflects the tablet's ability to resist wear and vibration during production, packaging, transportation, and storage. If the tablet fragility does not meet the standard, problems such as cracking and fragmentation may occur in subsequent stages, affecting not only the appearance of the drug but also potentially leading to inaccurate drug dosage and thus affecting efficacy. Therefore, accurate detection of tablet fragility is essential for ensuring drug quality. A certain number of tablets with known weight are placed in a fragility testing drum. The drum rotates at a set speed under the drive system. During rotation, the tablets continuously rub and collide with the inner wall of the drum, other tablets, and the inner wall of the drum, simulating the mechanical stress that tablets may experience during production, transportation, and storage. After a specified rotation time, the tablets are removed and weighed again. By calculating the weight difference of the tablets before and after the test, the fragility of the tablet is obtained.

[0003] In existing technologies, the drum is shaped like a round drum. During rotation, it generates centrifugal force on the tablets, causing them to adhere to the inner wall of the drum and preventing them from colliding inside. This results in invalid detection, making it impossible to accurately detect the fragility of the tablets and reducing the accuracy of drug quality assessment data.

[0004] In summary, this utility model provides a tablet friability testing mechanism to solve the above problems. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a tablet friability testing mechanism to solve the problem mentioned in the background technology that the rotation of the drum will generate centrifugal force on the tablet, thereby affecting the accuracy of the test data.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a tablet friability testing mechanism, comprising a base plate, a fixing plate fixedly installed on one side of the top of the base plate, a housing fixedly installed on one side of the fixing plate, a servo motor fixedly installed inside the housing, a drive shaft fixedly installed at the output end of the servo motor, one end of the drive shaft passing through the housing and the fixing plate in sequence, a load-bearing rotating assembly slidably installed between the other side of the top of the base plate, and a drum assembly installed between one end of the drive shaft and one side of the load-bearing rotating assembly.

[0007] Furthermore, the drive shaft is rotatably connected to the fixed plate via bearings, and the drive shaft is rotatably connected to the chassis via bearings.

[0008] Furthermore, the drum assembly includes three drum bodies and a first fixed sleeve. The first fixed sleeve is fixedly installed at one end of the drive shaft. An inner sleeve is fixedly installed at the center of the left side of each of the three drum bodies, and a second fixed sleeve is fixedly installed at the center of the right side of each of the three drum bodies. Both the first and second fixed sleeves are hollow cylindrical tubes, and both the right sides of the first and second fixed sleeves are open. Limiting blocks are fixedly connected to the top and bottom of the first and second fixed sleeves. One inner sleeve is embedded inside the first fixed sleeve, one inner sleeve is embedded to one side of the load-bearing rotating assembly through two limiting blocks, and the other two inner sleeves are respectively embedded inside the two second fixed sleeves.

[0009] Furthermore, one inner sleeve is threadedly connected to the first fixed sleeve, and the other two inner sleeves are threadedly connected to the second fixed sleeve.

[0010] Furthermore, four baffles are evenly fixedly connected to the inner ring surface of each drum body around the center, and a cover plate is elastically embedded on the back of each drum body through a sealing rubber ring, and a handle is fixedly installed on the back of each cover plate.

[0011] Furthermore, the load-bearing rotating assembly includes two mounting plates and a slide. Both mounting plates are fixedly installed on the other side of the top of the base plate. The slide is placed on the top of the base plate and located between the two mounting plates. A lead screw is rotatably connected to one side of one mounting plate via a bearing. One end of the lead screw passes through the slide and the other mounting plate. A rotating block is fixedly installed at one end of the lead screw. A support plate is fixedly installed on the top of the slide. A load-bearing seat passes through the two sides of the support plate. A groove is provided on one side of the load-bearing seat for fitting an inner sleeve and two limiting blocks.

[0012] Furthermore, the lead screw is rotatably connected to another mounting plate via a bearing, the lead screw is threadedly connected to the slide block, and the load-bearing seat is rotatably connected to the support plate via a bearing.

[0013] The beneficial effects of this utility model are:

[0014] By using four baffles evenly distributed on the inner ring of the drum, the movement trajectory of the tablet is cleverly altered as the drum rotates. This allows for sufficient friction and collision between the tablet and the inner wall of the drum, other tablets, and the baffles, realistically simulating the mechanical stress that tablets may encounter during production, transportation, and storage. At the same time, it avoids excessive centrifugal force on the tablet when the drum rotates, preventing invalid detection. By accurately simulating actual working conditions, the fragility of the tablet can be detected more accurately, providing more reliable data for drug quality assessment.

[0015] The rotating drum assembly consists of three drums, which are stably connected and rotate in tandem through threaded connections between the inner sleeve and the first and second fixed sleeves. This multi-drum design allows for the simultaneous testing of multiple samples, significantly improving testing efficiency compared to single-drum testing mechanisms. When pharmaceutical manufacturers or testing institutions need to test a large number of tablets for fragility, it can significantly shorten the testing cycle, improve work efficiency, and reduce manpower and time costs. Attached Figure Description

[0016] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0017] Figure 1 This is a perspective view of a tablet friability testing mechanism according to the present invention;

[0018] Figure 2 This is a front view of a tablet friability testing mechanism according to the present invention;

[0019] Figure 3 This is a main cross-sectional view of a tablet friability testing mechanism according to the present invention;

[0020] Figure 4 for Figure 3 The diagram shows a side sectional view of the drum body.

[0021] Figure 5 for Figure 3 The side view of the load-bearing base shown.

[0022] In the diagram: 1. Base plate; 2. Fixing plate; 3. Chassis; 4. Servo motor; 5. Drive shaft; 6. Drum assembly; 7. Load-bearing rotating assembly; 61. Drum body; 62. First fixing sleeve; 63. Inner sleeve; 64. Second fixing sleeve; 65. Limiting block; 66. Baffle; 67. Cover plate; 68. Handle; 71. Mounting plate; 72. Slide; 73. Support plate; 74. Load-bearing seat; 75. Lead screw; 76. Rotating block. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0024] Please see Figure 1-5This utility model provides a technical solution: a tablet friability testing mechanism, including a base plate 1, a fixing plate 2 fixedly installed on one side of the top of the base plate 1, a housing 3 fixedly installed on one side of the fixing plate 2, a servo motor 4 fixedly installed inside the housing 3, a drive shaft 5 fixedly installed at the output end of the servo motor 4, one end of the drive shaft 5 passing through the housing 3 and the fixing plate 2 in sequence, a load-bearing rotating assembly 7 slidably installed between the other side of the top of the base plate 1, a drum assembly 6 installed between one end of the drive shaft 5 and one side of the load-bearing rotating assembly 7, the servo motor 4 being connected to an external power supply and equipped with a power control switch ... The servo motor 4 is equipped with a dedicated driver, which can precisely control the motor's speed, direction, and running time. Operators can set and adjust the operating parameters of the servo motor 4 through the control system of the testing mechanism to meet the requirements of different testing standards for the drum speed and rotation time. The drive shaft 5 is rotatably connected to the fixed plate 2 through bearings, and the drive shaft 5 is rotatably connected to the housing 3 through bearings. The bearings are deep groove ball bearings, which have high rotational accuracy and load-bearing capacity, effectively reducing the frictional resistance and vibration of the drive shaft 5 during rotation, and ensuring that the drive shaft 5 rotates smoothly and accurately.

[0025] Please see Figure 2-4The drum assembly 6 includes three drum bodies 61 and a first fixing sleeve 62. The first fixing sleeve 62 is fixedly installed at one end of the drive shaft 5. An inner sleeve 63 is fixedly installed at the center of the left side of each of the three drum bodies 61, and a second fixing sleeve 64 is fixedly installed at the center of the right side of each of the three drum bodies 61. Both the first fixing sleeve 62 and the second fixing sleeve 64 are hollow cylindrical tubes, and both the right sides of the first fixing sleeve 62 and the second fixing sleeve 64 are open. Limiting blocks 65 are fixedly connected to the top and bottom of the first fixing sleeve 62 and the second fixing sleeve 64. The tube 63 is embedded inside the first fixed sleeve 62. One inner tube 63 is embedded to one side of the load-bearing rotating component 7 through two limiting blocks 65. The other two inner tubes 63 are respectively embedded inside the two second fixed sleeves 64. The design of the multi-drum body 61 can detect multiple samples simultaneously, improving detection efficiency. One inner tube 63 is threaded to the first fixed sleeve 62, and the other two inner tubes 63 are threaded to the second fixed sleeves 64. One inner tube 63 is embedded inside the first fixed sleeve 62 and is threaded to the first fixed sleeve 64. The fixed sleeve 62 is connected by a threaded connection, which has the advantages of strong connection and easy disassembly, making it convenient for operation during equipment maintenance or component replacement. The other two inner sleeves 63 are respectively embedded inside the two second fixed sleeves 64, and are also connected by threads, realizing a stable connection and coordinated rotation between the three drums 61. Each drum 61 has four baffles 66 evenly fixedly connected around the center on its inner ring surface. The function of the baffles 66 is to change the movement trajectory of the tablet when the drum 61 rotates, so that it can fully rub and collide with the inner wall of the drum 61, other tablets and baffles 66, more realistically simulating the mechanical stress that the tablet may be subjected to during production, transportation and storage, avoiding the generation of large centrifugal force on the tablet when the drum 61 rotates, and preventing invalid detection. Each drum 61 has a cover plate 67 elastically embedded on the back through a sealing rubber ring. Each cover plate 67 has a handle 68 fixedly installed on the back. The handle 68 is designed in accordance with the ergonomic principle, making it convenient for operators to open and close the cover plate 67 before and after detection to place and remove tablets.

[0026] Please see Figure 2-5The load-bearing rotating assembly 7 includes two mounting plates 71 and a slide 72. Both mounting plates 71 are fixedly mounted on the other side of the top of the base plate 1. The slide 72 is placed on the top of the base plate 1 and located between the two mounting plates 71. A lead screw 75 is rotatably connected to one side of one mounting plate 71 via a bearing. One end of the lead screw 75 passes through the slide 72 and the other mounting plate 71. A rotating block 76 is fixedly mounted to one end of the lead screw 75. A support plate 73 is fixedly mounted on the top of the slide 72. A through-beam passes between the two sides of the support plate 73. The load-bearing base 74 has a groove on one side for fitting the inner sleeve 63 and two limiting blocks 65. The size and shape of the groove are precisely designed to match the dimensions of the inner sleeve 63 and the limiting blocks 65, ensuring that the inner sleeve 63 can be accurately embedded in the groove and is limited by the limiting blocks 65, thus achieving a stable connection and coordinated rotation between the drum assembly 6 and the load-bearing rotating assembly 7. During installation, the operator only needs to align the inner sleeve 63 of the drum assembly 6 with the groove of the load-bearing base 74. The drum assembly 6 and the load-bearing rotating assembly 7 are installed by adjusting the position of the lead screw 75 so that the limiting block 65 is embedded in the corresponding position of the groove. The operation is simple, quick and easy, and the installation accuracy is high. The function of the limiting block 65 is to position and limit the inner sleeve 63, ensuring that the inner sleeve 63 is accurately installed inside the fixed sleeve and will not be displaced during the rotation of the drum. The lead screw 75 is rotatably connected to another mounting plate 71 through a bearing. The lead screw 75 is threadedly connected to the slide 72. The load-bearing seat 74 is rotatably connected to the support plate 73 through a bearing. When the operator rotates the rotating block 76 at one end of the lead screw 75, the rotation of the lead screw 75 can be converted into the horizontal linear movement of the slide 72 on the base plate 1. Through this lead screw transmission structure, the position of the slide 72 can be precisely adjusted, thereby adjusting the relative position between the load-bearing seat 74 and the drum assembly 6, realizing the precise installation and positioning of the drum assembly 6. The surface of the rotating block 76 is designed with anti-slip texture, which makes it easy for the operator to apply force to rotate and improves the convenience of operation.

[0027] Specific implementation method: The servo motor 4 is powered by an external power source. The operator starts the equipment by using the power control switch. After the servo motor 4 starts running, it drives the drive shaft 5, which is fixedly connected to its output end, to rotate. The drive shaft 5 is rotatably connected to the housing 3 and the fixed plate 2 through a deep groove ball bearing. With its high rotational accuracy and load-bearing capacity, the deep groove ball bearing greatly reduces the frictional resistance and vibration when the drive shaft 5 rotates, ensuring that the drive shaft 5 rotates smoothly and accurately, and providing stable power for the operation of subsequent components.

[0028] A first fixing sleeve 62 is fixedly installed at one end of the drive shaft 5. As the drive shaft 5 rotates, one of the inner sleeves 63 at the center of the left side of the three drum bodies 61 is threaded to the first fixing sleeve 62, and the other two are threaded to the second fixing sleeve 64 at the center of the right side, respectively. This achieves a stable connection between the drum bodies 61 and the drive shaft 5, as well as between them, ensuring that multiple drum bodies 61 can rotate in tandem and simultaneously test multiple samples, thus improving testing efficiency. Four baffles 66 evenly distributed on the inner ring surface of the drum body 61 change the movement trajectory of the tablets placed inside the drum body 61 when the drum body 61 rotates, so that the tablets fully rub and collide with the inner wall of the drum body 61, other tablets, and baffles 66. This realistically simulates the mechanical stress that tablets may encounter during production, transportation, and storage, and avoids generating large centrifugal forces on the tablets when the drum body 61 rotates, thus preventing invalid testing. A cover plate 67 elastically embedded on the back of the drum body 61 through a sealing ring is operated with an ergonomically designed handle 68, making it convenient for operators to open and close the cover plate 67 before and after testing, and to place and remove tablets.

[0029] In the load-bearing rotating assembly 7, two mounting plates 71 are fixed to the other side of the top of the base plate 1, and a slide 72 is placed between them. One end of a lead screw 75 is rotatably connected to one mounting plate 71 via a bearing, and the other end passes through the slide 72 and the other mounting plate 71, and is threadedly connected to the slide 72. When the operator rotates the rotating block 76, the lead screw 75 rotates, causing the slide 72 to move horizontally and linearly on the base plate 1. A support plate 73 at the top of the slide 72 has a load-bearing seat 74 passing through it. The load-bearing seat 74 is rotatably connected to the support plate 73 via a bearing and can move freely. The rotating drum assembly 6 is adapted to the movement of the rotating drum assembly 6. The size and shape of the groove on one side of the load-bearing seat 74 are precisely matched with the inner sleeve 63 and the limiting block 65. During installation, the inner sleeve 63 of the rotating drum assembly 6 is aligned with the groove, and the position of the lead screw 75 is adjusted so that the limiting block 65 is embedded in the corresponding position. This completes the installation of the rotating drum assembly 6 and the load-bearing rotating assembly 7, achieving precise positioning. The limiting block 65 positions and limits the inner sleeve 63, ensuring that the inner sleeve 63 is accurately positioned and does not shift when the drum rotates, thus ensuring a stable connection and coordinated operation between the rotating drum assembly 6 and the load-bearing rotating assembly 7.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tablet friability detection mechanism comprising a base plate (1), characterised in that: A fixing plate (2) is fixedly installed on one side of the top of the base plate (1). A housing (3) is fixedly installed on one side of the fixing plate (2). A servo motor (4) is fixedly installed inside the housing (3). A drive shaft (5) is fixedly installed at the output end of the servo motor (4). One end of the drive shaft (5) passes through the housing (3) and the fixing plate (2) in sequence. A load-bearing rotating assembly (7) is slidably installed between the other side of the top of the base plate (1). A drum assembly (6) is installed between one end of the drive shaft (5) and one side of the load-bearing rotating assembly (7).

2. The tablet friability detection mechanism of claim 1, wherein: The drive shaft (5) is rotatably connected to the fixed plate (2) via a bearing, and the drive shaft (5) is rotatably connected to the chassis (3) via a bearing.

3. The tablet friability detection mechanism of claim 1, wherein: The drum assembly (6) includes three drum bodies (61) and a first fixed sleeve (62). The first fixed sleeve (62) is fixedly installed at one end of the drive shaft (5). An inner sleeve (63) is fixedly installed at the center of the left side of each of the three drum bodies (61), and a second fixed sleeve (64) is fixedly installed at the center of the right side of each of the three drum bodies (61). The first fixed sleeve (62) and the second fixed sleeve (64) are both hollow cylindrical tubes. The right side of the first fixed sleeve (62) and the second fixed sleeve (64) are both open. Limiting blocks (65) are fixedly connected to the top and bottom of the first fixed sleeve (62) and the second fixed sleeve (64). One inner sleeve (63) is embedded inside the first fixed sleeve (62), and one inner sleeve (63) is embedded to one side of the load-bearing rotating assembly (7) through two limiting blocks (65). The other two inner sleeves (63) are respectively embedded inside the two second fixed sleeves (64).

4. The tablet friability detection mechanism of claim 3, wherein: One inner sleeve (63) is threaded to the first fixed sleeve (62), and the other two inner sleeves (63) are threaded to the second fixed sleeve (64).

5. The tablet friability detection mechanism of claim 3, wherein: Each drum body (61) has four baffles (66) evenly fixedly connected around the center on its inner ring surface. Each drum body (61) has a cover plate (67) elastically embedded on its back side through a sealing rubber ring. Each cover plate (67) has a handle (68) fixedly installed on its back side.

6. The tablet friability detection mechanism of claim 3, wherein: The load-bearing rotating assembly (7) includes two mounting plates (71) and a slide (72). The two mounting plates (71) are fixedly installed on the other side of the top of the base plate (1). The slide (72) is placed on the top of the base plate (1) and located between the two mounting plates (71). One side of one mounting plate (71) is rotatably connected to a lead screw (75) via a bearing. One end of the lead screw (75) passes through the slide (72) and the other mounting plate (71). One end of the lead screw (75) is fixedly installed with a rotating block (76). The top of the slide (72) is fixedly installed with a support plate (73). A load-bearing seat (74) passes through the two sides of the support plate (73). One side of the load-bearing seat (74) is provided with a groove for fitting an inner sleeve (63) and two limiting blocks (65).

7. A tablet friability detection mechanism according to claim 6, wherein: The lead screw (75) is rotatably connected to another mounting plate (71) via a bearing, the lead screw (75) is threadedly connected to the slide (72), and the load-bearing seat (74) is rotatably connected to the support plate (73) via a bearing.

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