Main motor adjusting mechanism of tablet press

Abstract

The utility model discloses an adjusting mechanism for a main motor of a tablet press, and solves the problem that the main motor of the tablet press cannot be accurately adjusted in the prior art. A main motor adjusting mechanism of a tablet press is characterized in that a first long groove body and a second long groove body are arranged on the surface of a motor adjusting plate, the length directions of the first long groove body and the second long groove body are perpendicular to each other, and the first long groove body and the second long groove body are respectively connected with a main motor and a tablet press frame in a sliding mode. A threaded hole parallel to the first long groove body or the second long groove body is formed in the side edge of the motor adjusting plate. And the adjusting screw rod fixing seat is fixedly arranged on the main motor or the tablet press frame and is provided with a first through hole which is over against the threaded hole. And an adjusting screw rod penetrates through the first through hole and is in threaded fit with the threaded hole. The device is easy and convenient to install and high in adjusting precision, stability of operation power of the tablet press is guaranteed, operation noise and vibration are reduced, daily maintenance of a main transmission system can be effectively reduced, and daily maintenance cost is reduced.

Description

Technical Field

[0001] This application relates to the technical field of pharmaceutical machinery, and particularly relates to a main motor adjustment mechanism for a tablet press. Background Art

[0002] At present, tablets have become one of the dosage forms with a large variety, high output, wide application, convenient use and storage, and stable quality. Tablets account for more than 1 / 3 of the total amount of preparations included in the pharmacopoeias of China and many other countries, indicating their wide application. A tablet press is the most important equipment in the production of tablets by pharmaceutical enterprises. It can press various granular raw materials into shapes and is mainly used for mass production of round and irregular tablets, sugar tablets, calcium tablets, etc., and is widely used in industries such as pharmaceuticals, chemicals, food, and electronics.

[0003] The main body structure of a tablet press generally consists of the following main components or systems: main drive system, main shaft component, stamping component, upper guide rail combination component, lower guide rail combination component, body component, feeding system, tablet discharging system, control cabinet component, filling component, main / pre-pressing wheel component, peripheral door and window component, operation control system, etc.

[0004] Among them, the main drive system provides a power source for the rotary tablet pressing of the tablet press. The installation and adjustment method of the main motor adjustment mechanism of the traditional tablet press main drive system is as follows: The main motor is installed and fixed on the motor adjustment plate, the motor pulley and the worm pulley are respectively installed and fixed on the main motor and the worm shaft of the reducer, and then the synchronous toothed belt is installed on the two groups of pulleys. Since the position of the reducer worm and the reducer turbine is fixed, that is, the position of the worm pulley after installation is also fixed and non-adjustable, the parallelism of the axes of the two groups of pulleys and the initial tension of the synchronous belt are adjusted by adjusting the position of the main motor (worm pulley).

[0005] The main motor installation on the motor adjustment plate is designed with long slot holes, which can adjust the position of the main motor (worm pulley) in the left and right directions. The fixing holes of the motor adjustment plate and the base component are also designed as long slot holes for adjusting the position of the main motor (worm pulley) in the front and back directions. After installation, use a non-metallic tool to tap the side of the motor adjustment plate, so that the motor adjustment plate drives the main motor (motor pulley) to move radially (front and back) along the main motor shaft, and adjust until the middle of the synchronous toothed belt can be pressed inward by 10 - 20 mm by hand, so that the synchronous toothed belt has a certain initial tension, and finally lock the fixing bolts of the motor adjustment plate.

[0006] To sum up, the main motor adjustment mechanism of the traditional tablet press main drive system has the following deficiencies:

[0007] 1. When the adjusting motor adjustment plate applies an initial tension to the synchronous toothed belt, since the belt on one side of the main motor (motor pulley) is stressed, it will stretch the main motor adjustment mechanism in the opposite direction, making the operation of adjusting the tension of the synchronous toothed belt cumbersome and requiring the cooperation of multiple people, which is time-consuming and laborious with low work efficiency.

[0008] 2. Since the synchronous toothed belt already has an initial tension, one end of the two sets of pulleys is stressed, resulting in great difficulty in adjusting the parallelism of the axes of the two sets of pulleys (i.e., the θm angle of the main motor) and being unable to adjust precisely.

[0009] 3. During the debugging process, using tools to knock on the motor adjustment plate easily causes damage to the surface of the parts. In severe cases, it is necessary to rework or replace with new parts, resulting in unnecessary economic losses.

[0010] 4. In the national standard of rotary tablet presses, there are strict regulations on the running noise of the tablet press. The adjustment of the main motor of the traditional main drive system is not ideal. During the high-speed operation of the equipment, the friction between the synchronous belt and the pulley generates greater noise, and the vibration of the whole machine also increases during operation, thus affecting other overall performances of the tablet press.

[0011] 5. If the motor pulley is skewed due to the adjustment mechanism not being adjusted in place, it will cause the side of the synchronous belt to be pressed tightly against the pulley retaining ring, resulting in increased wear on the side of the belt, increasing the replacement frequency of the synchronous belt, and even having the risk of the synchronous belt being cut by the pulley retaining ring. Moreover, it reduces the operating efficiency of the main motor, increases the system energy consumption, and increases the daily operation and maintenance cost of the equipment. Utility Model Content

[0012] The embodiment of the present application provides a main motor adjustment mechanism for a tablet press, which solves the problem that the prior art cannot precisely adjust the main motor of the tablet press.

[0013] The embodiment of the present application provides a main motor adjustment mechanism for a tablet press, which includes a motor adjustment plate, an adjusting screw fixing seat, and an adjusting screw. The surface of the motor adjustment plate is provided with a first long groove and a second long groove. The length directions of the first long groove and the second long groove are perpendicular to each other, and they are respectively slidably connected to the main motor and the tablet press frame. A threaded hole parallel to the first long groove or the second long groove is provided on the side of the motor adjustment plate. The adjusting screw fixing seat is fixedly arranged on the main motor or the tablet press frame and is provided with a first through hole facing the threaded hole. The adjusting screw passes through the first through hole and is in threaded cooperation with the threaded hole.

[0014] In one of the embodiments, the adjusting screw sequentially includes a rotating part and a threaded part. The rotating part is a square head or hexagonal head structure. The outer wall of the threaded part is provided with an external thread. The diameter of the rotating part is greater than the first through hole. The diameter of the threaded part is less than the first through hole.

[0015] In one of the embodiments, a first baffle and a second baffle are further included. The adjusting screw sequentially includes a rotating portion, a limiting portion, and a threaded portion. The rotating portion has a square head or hexagonal head structure. The radius of the limiting portion is smaller than that of the rotating portion or the threaded portion. An external thread is provided on the outer wall of the threaded portion. The diameter of the first through hole is larger than any part of the adjusting screw. Notches are provided on the side edges of the first baffle and the second baffle, and a second through hole formed by the notches is in the middle of the complete structure formed by combining the two baffles; the diameter of the second through hole is smaller than that of the rotating portion and the threaded portion, and is greater than or equal to that of the limiting portion. The first baffle and the second baffle are fixedly arranged on the side wall of the adjusting screw fixing seat, and the second through hole is coaxially aligned with the first through hole.

[0016] Preferably, the axial length of the second through hole is slightly smaller than that of the limiting portion.

[0017] Preferably, a groove adapted to the complete structure formed by combining the first baffle and the second baffle is provided on the side wall of the screw fixing seat.

[0018] Preferably, a locking nut is further included. The locking nut is arranged on the adjusting screw.

[0019] The above at least one technical solution adopted in the embodiment of the present application can achieve the following beneficial effects:

[0020] The present application simplifies the adjustment process of the parallelism of the axes of the worm pulley and the motor pulley and the initial tension of the synchronous belt, improving the efficiency. The mechanism is easy to install, has high adjustment accuracy, ensures the stable operation power of the tablet press, reduces the running noise and vibration, can effectively reduce the daily maintenance of the main transmission system, and reduces the daily maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0022] Figure 1 is a structural diagram of the main transmission system of the prior art;

[0023] Figure 2 is a working schematic diagram of the main transmission system of the prior art;

[0024] Figure 3 is a schematic diagram of the synchronous pulley process of the prior art;

[0025] Figure 4 is a structural diagram of the motor adjustment plate of the prior art;

[0026] Figure 5 is a structural diagram of a main motor adjustment mechanism of an embodiment of the present application;

[0027] Figure 6 Structural diagram of the screw fixing seat and adjusting screw for the embodiments of the present application. Detailed implementation manners

[0028] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Apparently, the described embodiments are only a part rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without making creative efforts shall fall within the scope of protection of the present application.

[0029] The following will describe in detail the technical solutions provided by each embodiment of the present application with reference to the drawings.

[0030] The main drive system, as Figure 1 shown, provides a power source for the rotary tablet pressing of the tablet press. The main drive system of the traditional tablet press mainly consists of a main motor, a motor adjustment plate, a reducer turbine, a reducer worm, a main frequency converter, a worm pulley, a synchronous toothed belt, a motor pulley and a handwheel for turning the machine.

[0031] The working process of the main drive system of the tablet press is as follows: the output shaft of the main motor is directly connected to the motor pulley through a flat key, and the motor pulley transmits power to the worm pulley through a synchronous toothed belt. The worm pulley is installed on the reducer worm shaft, and the reducer worm drives the turbine to rotate. The main shaft is directly installed on the reducer turbine, and the main shaft is also connected to the stamping combination through a key and a locking mechanism, thereby driving the stamping combination to rotate, and with the cooperation of other systems of the tablet press, finally completing the complete tablet pressing process of the five processes of feeding, metering, pre-pressing, main pressing and tablet discharging of the tablet press to obtain qualified tablet products. A handwheel for turning the machine is installed at one end of the main reducer. In the stopped state, turning the handwheel for turning the machine can make the stamping combination rotate for die replacement or maintenance work of the tablet press. Specifically as Figure 2 shown.

[0032] Both the "Synchronous Belt Drive" chapter of the "Mechanical Design Manual" and the "Debugging Rules" of the equipment require that when installing the motor pulley and the worm pulley, attention must be paid to the parallelism of the axes of the two groups of pulleys, so that the transmission center planes of the two groups of pulleys are in the same plane, to prevent the side of the synchronous belt from being tightly pressed against the pulley retaining ring due to pulley deflection, resulting in increased wear of the belt side, and even the risk of the synchronous belt being cut by the pulley retaining ring. See the attached Figure 3 . The "Mechanical Design Manual" stipulates the deflection angle θm, as Figure 2 shown, the maximum allowable value, see Table 1.

[0033]

[0034]

[0035] Table 1 Allowable value of skew angle θm

[0036] The installation and adjustment method of the main motor adjustment mechanism of the main drive system of the traditional tablet press is as follows: Install and fix the main motor on the motor adjustment plate, install and fix the motor pulley and the worm pulley on the main motor and the worm shaft of the reducer respectively, and then install the synchronous toothed belt on the two groups of pulleys. Since the positions of the worm of the reducer and the turbine of the reducer are fixed, that is, the position after the installation of the worm pulley is also fixed and non-adjustable, the parallelism of the axes of the two groups of pulleys and the initial tension of the synchronous belt are adjusted by adjusting the position of the main motor (worm pulley).

[0037] The main motor is installed on the motor adjustment plate with a long slot hole design, which can adjust the position of the main motor (worm pulley) in the left and right directions. The fixing holes of the motor adjustment plate and the base component are also designed as long slot holes, which are used to adjust the position of the main motor (worm pulley) in the front and back directions, as Figure 4 shown. After installation, tap the side of the motor adjustment plate with a non-metallic tool to make the motor adjustment plate drive the main motor (motor pulley) to move radially (front and back) along the main motor shaft, and adjust until the middle of the synchronous toothed belt can be pressed inwards by 10 - 20 mm by hand, so that the synchronous toothed belt has a certain initial tension, and finally lock the fixing bolts of the motor adjustment plate, as Figure 2 shown.

[0038] Figure 5 This is a structural diagram of the main motor adjustment mechanism of a tablet press according to an embodiment of the present application, which includes a motor adjustment plate 1, an adjustment screw fixing seat 2, and an adjustment screw 3.

[0039] The surface of the motor adjustment plate is provided with a first long slot and a second long slot, and the length directions of the first long slot and the second long slot are perpendicular to each other, and are respectively slidably connected to the main motor and the tablet press frame.

[0040] The side of the motor adjustment plate is provided with a threaded hole parallel to the first long slot or the second long slot.

[0041] The adjustment screw fixing seat is fixedly arranged on the main motor or the tablet press frame, and is provided with a first through hole facing the threaded hole.

[0042] For example, the screw fixing seat is installed and fixed on the base component of the tablet press, which is used for the installation of the adjustment screw and bears the pulling force when the adjustment screw pulls the motor adjustment plate during the adjustment process.

[0043] The adjustment screw passes through the first through hole and is in threaded fit with the threaded hole.

[0044] For example, as Figure 5As shown, two sets of adjusting devices are added to the original motor adjusting plate in this application. Both sets of adjusting devices are installed and fixed on the base component. The two sets of adjusting devices are distributed at both ends on one side of the motor adjusting plate. This mechanism uses precision adjusting screws. One end of the adjusting screw is fixed and the other end is screwed into the motor adjusting plate. One end of the adjusting screw is designed as a regular square head to facilitate the operation of tools to rotate the adjusting screw. By adjusting the two sets of adjusting devices at both ends respectively, the position of the motor adjusting plate in the front-back direction can be adjusted, that is, the parallelism of the axes of the two sets of belt pulleys can be accurately adjusted to meet the installation requirements, and the initial tension of the synchronous belt can also be accurately adjusted.

[0045] In one embodiment, the adjusting screw sequentially includes a rotating part and a threaded part. The rotating part is a hexagonal head structure. The outer wall of the threaded part is provided with an external thread. The diameter of the rotating part is greater than that of the first through hole. The diameter of the threaded part is smaller than that of the first through hole.

[0046] Since the diameter of the rotating part is greater than that of the first through hole, when the adjusting screw passes through the first through hole and enters the threaded hole, the adjusting screw is limited by the adjusting screw fixing seat to move axially in the direction of the motor adjusting plate.

[0047] Figure 6 This is a structural diagram of the screw fixing seat and the adjusting screw in the embodiment of this application.

[0048] In one embodiment, it further includes a first baffle 41 and a second baffle 42.

[0049] The adjusting screw sequentially includes a rotating part 31, a limiting part 32 and a threaded part 33.

[0050] The rotating part is a regular square head or a hexagonal head structure.

[0051] The radius of the limiting part is smaller than that of the rotating part or the threaded part.

[0052] The outer wall of the threaded part is provided with an external thread.

[0053] The diameter of the first through hole is greater than any part of the adjusting screw.

[0054] For example, one end of the adjusting screw (i.e., the threaded part) is designed as a fine-pitch external thread with a small pitch and is screwed into the screw hole of the motor adjusting plate; the other end is designed as a hexagonal head structure (i.e., the rotating part) for convenient operation of tools, and a ring groove (i.e., the limiting part) is designed for the installation of the first baffle and the second baffle. By rotating the hexagonal head of the adjusting screw with a tool, the adjusting screw rotates, and then the motor adjusting plate is pulled to move along the axial direction of the adjusting screw, realizing the adjustment of the position of the motor adjusting plate (motor pulley). The pitch of the fine-pitch thread is fixed, that is, the position where the motor adjusting plate moves when the screw rotates one circle can be quantified. With the hexagonal head, the whole-circle adjustment can be divided into one-sixth, realizing more precise adjustment.

[0055] Notches are provided on the side edges of the first baffle and the second baffle, and a second through hole formed by the notches is in the middle of the complete structure formed by combining the two baffles; the diameter of the second through hole is smaller than that of the rotating part and the threaded part and is greater than or equal to that of the limiting part.

[0056] Preferably, a groove adapted to the complete structure formed by combining the first baffle and the second baffle is provided on the side wall of the screw fixing seat.

[0057] For example, the first baffle and the second baffle are symmetrically designed. During installation, first install the first baffle and the second baffle into the ring groove of the adjusting screw, then install them together into the screw fixing seat, and finally lock them with fastening screws.

[0058] The first baffle and the second baffle are fixedly arranged on the side wall of the adjusting screw fixing seat, and the second through hole is coaxially aligned with the first through hole.

[0059] For example, the first baffle and the second baffle are used to install and fix the adjusting screw on the screw fixing seat through fasteners.

[0060] Preferably, the first baffle and the second baffle are fixedly arranged on the screw fixing seat through baffle fastening screws 5.

[0061] The baffle fastening screws are standard off-the-shelf screws or bolts used to complete the fixation between the first baffle, the second baffle, and the screw fixing seat.

[0062] Preferably, the axial length of the second through hole is slightly smaller than that of the limiting part.

[0063] Due to the difference in diameter between the limiting part and the rotating part and the threaded part, the threaded part and the rotating part fix the combination of the first baffle and the second baffle within the range of the limiting part. Since the axial length of the second through hole is slightly smaller than that of the limiting part, and the combination of the first baffle and the second baffle is fixedly connected to the screw fixing seat, the axial movement of the adjusting screw can be limited through the combination of the first baffle and the second baffle.

[0064] Preferably, it further includes a lock nut 6. The lock nut is arranged on the adjusting screw rod. The lock nut is used to lock the adjusting screw rod after the adjustment is completed to prevent the screw rod from loosening.

[0065] It should be noted that the screw rod fixing seat, the adjusting screw rod, the first baffle, and the second baffle are all self-made and processed parts.

[0066] It should also be noted that in this application, no matter which type of screw or nut is used, it is used to complete the fixing and locking between two parts in the mechanism, so they can be collectively referred to as fasteners. The fasteners are used for locking and fixing between the parts of the main motor adjustment mechanism.

[0067] For the tablet press using the main motor adjustment mechanism of this main drive system, the adjustment process of the parallelism of the axes of the worm pulley and the motor pulley and the initial tension of the synchronous belt becomes simple, improving the efficiency. This mechanism is easy to install and has high adjustment accuracy, ensuring the stable operation power of the tablet press, reducing the running noise and vibration, effectively reducing the daily maintenance of the main drive system, and reducing the daily maintenance cost.

[0068] It should be noted that the structures and sizes of the main motor and the motor adjustment plate selected for the main drive systems of different series of tablet presses are different. By adjusting and changing the adjustment mechanism, it can be applicable to the adjustment of the main motor (motor pulley) of the main drive systems of various series of tablet presses.

[0069] Adopting this application can achieve the following beneficial effects:

[0070] 1. The adjustment mechanism uses a precision screw rod to adjust the position of the motor adjustment plate, which can realize the quantitative adjustment of the position of the main motor (worm pulley), and can accurately adjust the parallelism of the axes of the two groups of pulleys (i.e., the θm angle of the main motor), so as to meet the installation requirements.

[0071] 2. When adjusting the initial tension of the synchronous toothed belt, the two groups of adjustment mechanisms tighten and fix both ends of the motor adjustment plate in the front and back directions, and the adjustment will not be affected by the initial tension. The adjustment process is convenient to operate, greatly improving the work efficiency.

[0072] 3. There are various series of tablet presses, and the structures and sizes of the main motor and the motor adjustment plate selected for their main drive systems are different. By adjusting and changing the adjustment mechanism, it can be applicable to the adjustment of the main motor (motor pulley) of the main drive systems of various series of tablet presses, with a wide range of applications.

[0073] 4. For the tablet press using the new main drive system main motor adjustment mechanism, the synchronous belt is installed reliably, reducing the abnormal wear caused by the improper installation of the motor pulley, reducing the running noise and vibration, making the main drive system operate stably and reliably, and at the same time reducing the daily operation and maintenance cost of the equipment.

[0074] 5. The main motor adjustment mechanism of the new main drive system is simple in structure, convenient for installation and debugging, truly reflecting the great effect with small cost.

[0075] The above are only examples of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A tablet press main motor adjustment mechanism, characterized in that: It includes a motor adjustment plate, an adjustment screw fixing seat and an adjustment screw; The surface of the motor adjustment plate is provided with a first long slot body and a second long slot body, the length directions of the first long slot body and the second long slot body are perpendicular to each other, and are slidably connected to the main motor and the tablet press frame respectively; The side edge of the motor adjustment plate is provided with a threaded hole parallel to the first long slot body or the second long slot body; The adjusting screw fixing seat is fixedly arranged on the main motor or the tablet press frame, and is provided with a first through hole facing the threaded hole; The adjusting screw passes through the first through hole and is threadably engaged with the threaded hole.

2. The main motor adjustment mechanism of the tablet press according to claim 1, characterized in that: The adjusting screw comprises a rotating portion and a threaded portion in sequence; The rotating part is a square head or a hexagonal head structure; The outer wall of the threaded portion is provided with an external thread; The diameter of the rotating portion is larger than the first through hole; The threaded portion has a smaller diameter than the first through hole.

3. The main motor adjustment mechanism of the tablet press according to claim 1, characterized in that: Also includes a first baffle and a second baffle; The adjusting screw comprises a rotating portion, a limiting portion and a threaded portion in sequence; The rotating part is a square head or a hexagonal head structure; The radius of the limiting portion is smaller than that of the rotating portion or the threaded portion; The outer wall of the threaded portion is provided with an external thread; The diameter of the first through hole is larger than any part of the adjusting screw; The first baffle plate and the second baffle plate are both provided with notches on their sides, and a second through hole formed by the notches is provided in the middle of the complete structure of the two baffle plates; the diameter of the second through hole is smaller than the rotating part and the threaded part, and is greater than or equal to the limiting part; The first baffle plate and the second baffle plate are fixedly arranged on the side wall of the adjusting screw fixing seat, and the second through hole is coaxially opposite to the first through hole.

4. The main motor adjustment mechanism of the tablet press according to claim 1, characterized in that: A locking nut is also included; The locking nut is arranged on the adjusting screw.

5. The main motor adjustment mechanism of the tablet press according to claim 3, characterized in that: The axial length of the second through hole is slightly smaller than that of the limiting portion.

6. The main motor adjustment mechanism of the tablet press according to claim 3, characterized in that: The side wall of the screw fixing seat is provided with a groove adapted to the complete structure of the first baffle plate and the second baffle plate.

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