Main transmission direct-drive main frame pulling and pressing type tablet press

Abstract

The utility model provides a main drive direct drive main frame tension compression type tablet press which comprises a vertical frame, an equipment rack, stand columns, a top plate and pull rods, the equipment rack is arranged on the vertical frame, a tablet pressing working chamber is arranged on the equipment rack, the equipment rack is connected with the top plate through a plurality of stand columns, and each pull rod sequentially penetrates through the top plate, the stand columns, the equipment rack and the vertical frame from top to bottom. Two ends of the pull rod are fixedly connected with the equipment rack and the top plate respectively. The device has the advantages that the problem that in the prior art, when a stand column, a top plate and an equipment rack are fixed through screws, the stress value of each screw is difficult to unify, and the screws are independent parts, so that the stress of the top plate and the stress of the equipment rack are not integrated, and the structure of the equipment is loose is solved. According to the scheme, the equipment rack, the top plate and the vertical frame are further connected through the pull rod and are pulled and pressed towards the center of the equipment, stress of the three parts can be regarded as a whole, and stress of the equipment is more compact.

Description

Technical Field

[0001] The utility model relates to the field of main drive direct drive main frame pull-press tablet presses, and more specifically to a main drive direct drive main frame pull-press tablet press. Background Art

[0002] At present, the main frame of common tablet press equipment is supported by four columns. After the columns are positioned, they are installed on the top plate and the equipment frame through screws. When the tablet press is working under load, it is difficult to eliminate the outward thrust generated by the pressure wheel when pressing tablets with this structure, resulting in problems such as unstable equipment operation and high equipment noise.

[0003] At the same time, common tablet presses on the market all use a two-stage reduction drive of a pulley driving a worm and worm gear. The disadvantages of this structure are as follows:

[0004] The transmission of traditional tablet presses involves a large number of transmission parts. The belt needs to be regularly inspected and replaced. There are gaps in the gear matching of the worm and worm gear, resulting in large transmission errors. High temperature will have a greater impact on tablet production. The lubricating oil in the worm gear box needs to be regularly replaced, and the oil leakage situation needs to be detected, etc., further resulting in high maintenance costs and shortened service life of traditional tablet presses. Content of the Utility Model

[0005] The utility model overcomes the deficiencies in the prior art and provides a main drive direct drive main frame pull-press tablet press.

[0006] The purpose of the utility model is achieved by the following technical solutions.

[0007] A main drive direct drive main frame pull-press tablet press includes an upright frame, an equipment frame, columns, a top plate and a pull rod. The equipment frame is provided on the upright frame, and a tablet pressing working chamber is provided on the equipment frame. The equipment frame is connected to the top plate through a plurality of columns. Each pull rod sequentially passes through the top plate, the columns, the equipment frame and the upright frame from top to bottom, and both ends of the pull rod are fixedly connected to the equipment frame and the top plate respectively.

[0008] Both ends of the pull rod are connected to the equipment frame and the top plate through fixing components. The fixing components include screws and washers. The screws are threadedly connected to the pull rod, and the washers are arranged between the screws and the corresponding contact surfaces.

[0009] The number of columns is 4, and the columns are symmetrically arranged in pairs on the equipment frame.

[0010] A first installation through groove is provided at the central axis of the column, and the pull rod is arranged in the first installation through groove.

[0011] A plurality of second installation through grooves are provided on the equipment frame. The pull rod passes through the second installation through grooves. The setting positions and numbers of the second installation through grooves match those of the columns.

[0012] The central part of the equipment frame is penetrated by the equipment main shaft. A direct drive motor is provided below the equipment main shaft. The outer shell of the direct drive motor is fixedly connected to the equipment frame. An absolute encoder is provided on the direct drive motor, and the absolute encoder is cooperatively connected to the equipment main shaft.

[0013] The absolute encoder adopts a 23-bit absolute encoder.

[0014] The beneficial effects of the present utility model are as follows:

[0015] It solves the problem in the prior art that when the equipment uses screws to fix the column, the top plate and the equipment frame, since the force values of each screw are difficult to be unified, and the cut screws are separate parts, the force on the top plate and the equipment frame is not a whole, resulting in a relatively loose structure of the equipment.

[0016] In this solution, tie rods are used to further connect the equipment frame, the top plate and the vertical frame. By pulling and pressing the tie rods towards the center of the equipment, the forces on the three can be regarded as a whole, making the equipment more compact in force.

[0017] At the same time, the improved tablet press device adopts a main drive direct drive main frame pull-press type tablet press structure, and its transmission error is very small, which can reach within 1 μm. After long-term operation, the temperature rise in the tablet pressing chamber is not obvious, and the qualified rate of tablet forming has always been in a relatively high state. The direct drive motor has the advantages of simple and fast maintenance; the energy consumption of direct drive transmission is reduced by nearly 30%. Due to the existence of the tie rods, the tensile stress can offset the outward thrust of the pressing wheel, the vibration of the equipment is significantly weakened, the noise is reduced, and the operation stability of the equipment is greatly improved. Description of the Drawings

[0018] Figure 1 is the structural schematic diagram of the present utility model;

[0019] Figure 2 is the structural schematic diagram of the frame of the present utility model;

[0020] Figure 3 is the structural schematic diagram of the equipment frame;

[0021] In the figure: 1, vertical frame; 2, equipment frame; 21, tablet pressing working chamber; 22, equipment main shaft; 23, direct drive motor; 24, absolute encoder; 3, column; 4, top plate; 5, tie rod; 6, first installation through groove; 7, second installation through groove. Detailed Embodiments

[0022] The technical solutions of the present utility model will be further described below through specific embodiments.

[0023] Embodiment

[0024] A main drive direct drive main frame tension-compression tablet press, comprising a vertical frame 1, an equipment frame 2, columns 3, a top plate 4 and tie rods 5. The vertical frame 1 is provided with the equipment frame 2, and the equipment frame 2 is provided with a tablet pressing working chamber 21. The equipment frame 2 is connected to the top plate 4 through a plurality of columns 3. Each tie rod 5 sequentially passes through the top plate 4, the columns 3, the equipment frame 2 and the vertical frame 1 from top to bottom, and both ends of the tie rod 5 are fixedly connected to the equipment frame 2 and the top plate 4 respectively.

[0025] Both ends of the tie rod 5 are connected to the equipment frame 2 and the top plate 4 through fixing components. The fixing components include screws and gaskets. The screws are threadedly connected to the tie rod 5, and the gaskets are arranged between the screws and the corresponding contact surfaces.

[0026] The number of columns 3 is 4, and the columns 3 are symmetrically arranged in pairs on the equipment frame 2.

[0027] A first installation through groove 6 is provided at the central axis of the column 3, and the tie rod 5 is arranged in the first installation through groove 6.

[0028] A plurality of second installation through grooves 7 are provided on the equipment frame 2, and the tie rod 5 passes through the second installation through grooves 7. The arrangement positions and the number of the second installation through grooves 7 match those of the columns 3.

[0029] An equipment main shaft 22 is passed through the central part of the equipment frame 2. A direct drive motor 23 is provided below the equipment main shaft 22. The outer shell of the direct drive motor 23 is fixedly connected to the equipment frame 2. An absolute encoder 24 is provided on the direct drive motor 23, and the absolute encoder 24 is cooperatively connected to the equipment main shaft 22.

[0030] The absolute encoder 24 adopts a 23-bit absolute encoder 24.

[0031] As Figure 1 shown, the working principle of the present utility model is as follows. The vertical frame 1, the equipment frame 2, the columns 3 and the top plate 4 are fixed together by 4 tie rods 5. A tensile stress opposite to that of the columns 3 is provided by the tie rods 5, so that the tensile stress of the overall structure approaches the center of the equipment, increasing the overall compactness of the equipment and overcoming the problem of device loosening caused by the difficulty in unifying the force values of each fixing screw in the prior art.

[0032] Furthermore, as Figure 2As shown in the figure, in this solution, the equipment main shaft 22 provided on the equipment frame 2 passes through the equipment frame 21 from top to bottom, passes through the positioning bearing and the motor adjusting pad, and then penetrates into the direct drive motor 23. The bottom flange of the direct drive motor 23 is fixedly provided with an absolute encoder with 23 bits. The absolute encoder 24 is connected to the equipment main shaft 22 to play a counting role. The direct drive motor 23 and the equipment main shaft 22 are positioned by a guiding key to play a transmission role. The motor adjusting pad is responsible for adjusting the horizontal position of the direct drive motor. The direct drive motor 23 is directly fixed on the equipment frame 2 through the upper flange. Compared with the old-fashioned tablet press, it has a higher functional improvement in terms of accuracy, temperature rise, equipment noise, tablet forming effect during long-term operation, and maintenance speed, etc.

[0033] The above has described the embodiments of the present invention in detail, but the content described is only the preferred embodiment of the present invention and cannot be considered as used to limit the scope of implementation of the present invention. Any equivalent changes and improvements made within the scope of the application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims

1. A main transmission direct drive main frame tension and compression type tablet press, characterized in that: It includes a stand, an equipment rack, a column, a top plate and a pull rod. The stand is provided with an equipment rack, and a tablet pressing studio is provided on the equipment rack. The equipment rack is connected to the top plate through a plurality of columns. Each pull rod passes through the top plate, the column, the equipment rack and the stand from top to bottom, and both ends of the pull rod are fixedly connected to the equipment rack and the top plate respectively.

2. A main transmission direct drive main frame tension and compression type tablet press according to claim 1, characterized in that: The two ends of the pull rod are connected to the equipment frame and the top plate through a fixing component. The fixing component includes a screw and a gasket. The screw is connected to the pull rod through a thread, and the gasket is arranged between the screw and the corresponding contact surface.

3. A main transmission direct drive main frame tension and compression type tablet press according to claim 1, characterized in that: The number of the columns is 4, and the columns are symmetrically arranged in pairs on the equipment rack.

4. The main transmission direct drive main frame tension and compression type tablet press according to claim 1, characterized in that: A first installation slot is provided at the central axis of the column, and the pull rod is arranged in the first installation slot.

5. A main transmission direct drive main frame tension and compression type tablet press according to claim 4, characterized in that: The equipment rack is provided with a plurality of second installation slots, the pull rods pass through the second installation slots, and the arrangement positions and the number of the second installation slots match the columns.

6. A main transmission direct drive main frame tension and compression type tablet press according to any one of claims 1 to 5, characterized in that: A device spindle is passed through a central tube of the device frame, a direct drive motor is arranged below the device spindle, a housing of the direct drive motor is fixedly connected to the device frame, an absolute value encoder is arranged on the direct drive motor, and the absolute value encoder is cooperatively connected to the device spindle.

7. A main transmission direct drive main frame tension and compression type tablet press according to claim 6, characterized in that: The absolute value encoder adopts a 23-bit absolute value encoder.

Images