Upper pressing wheel adjusting device of tablet press

Abstract

The utility model discloses an upper pressing wheel adjusting device of a tablet press. An axial cavity is formed in a shell; the worm gear is rotatably arranged in the middle of the cavity, and a through hole is formed in the center of the worm gear; the worm cavity is arranged on the shell, is positioned on one side of the cavity and is orthogonal to the cavity, and the worm cavity is communicated with the cavity; a worm is rotatably arranged in the worm cavity and meshed with the worm gear, and the tail end of the worm is connected with a gear motor; the worm gear rod is arranged in the through hole and is connected with the worm gear through a first flat key; an axial pipe cavity is formed in the center of the worm gear rod; the lead screw is arranged in the pipe cavity, the periphery of the lead screw is in threaded connection with the inner wall of the pipe cavity, and the free end of the lead screw is connected with the upper pressing wheel; the guide cover is detachably connected with the shell, and a center hole for the lead screw to stretch out is formed in the center of the guide cover. The utility model has the beneficial effect that the position of the pinch roller can be adjusted.

Description

Technical Field

[0001] The utility model relates to the technical field of tablet presses, and particularly relates to an upper pressure wheel adjusting device for a tablet press. Background Art

[0002] A tablet press is a device that can press granular or powdery raw materials into a formed shape according to the shape of the required product, and is widely used in industries such as pharmaceuticals, chemicals, and food. With the rapid development of medical technology, people's requirements for pharmaceutical equipment are also getting higher and higher. In order to better meet the needs of the pharmaceutical industry, for the compressibility problem of tablets, a self - adjusting system for the pressure wheel has been specially designed to improve the quality of tablet forming. Content of the Utility Model

[0003] The purpose of the utility model is to provide an upper pressure wheel adjusting device for a tablet press, which drives a worm to rotate through a reduction motor, the worm drives a worm wheel to rotate, the worm wheel drives a worm rod to rotate through a first flat key, the worm rod is thread - connected with a lead screw, and the lead screw moves up and down axially under transmission to realize the position adjustment of the pressure wheel.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions, including:

[0005] A housing, which has an axial cavity inside;

[0006] A worm wheel, which is rotatably arranged in the middle of the cavity, and a through - hole is provided in the center of the worm wheel;

[0007] A worm cavity, which is arranged on the housing and is orthogonally arranged on one side of the cavity and communicates with the cavity;

[0008] A worm, which is rotatably arranged in the worm cavity and meshes with the worm wheel, and the end of the worm is connected to a reduction motor; and

[0009] A worm rod, which is arranged in the through - hole and is connected to the worm wheel through a first flat key; an axial tube cavity is provided in the center of the worm rod;

[0010] A lead screw, which is arranged in the tube cavity, the outer periphery of the lead screw is thread - connected with the inner wall of the tube cavity, and the free end of the lead screw is connected to an upper pressure wheel;

[0011] A guiding cover, which is detachably connected to the housing, and a central hole for the lead screw to extend out is provided in the center of the guiding cover.

[0012] Preferably, a central shaft of the pressure wheel is arranged at the lower end of the worm rod;

[0013] A first bearing is arranged in the cavity and is located at the lower part of the cavity for supporting the central shaft of the pressure wheel.

[0014] Preferably, it further includes:

[0015] A second bearing, which is arranged at the middle and lower part of the cavity and is used for rotatably supporting the lower part of the worm gear;

[0016] A third bearing, which is arranged at the middle and upper part of the cavity and is used for rotatably supporting the upper part of the worm gear;

[0017] Wherein, snap rings are respectively arranged at the upper edges of the second bearing and the third bearing.

[0018] Preferably, it further includes:

[0019] A first limiting groove, which is arranged on the outer periphery of the upper part of the lead screw;

[0020] A first limiting block, which is arranged at the upper end of the lumen and is adapted to the first limiting groove for limiting the rising distance of the lead screw.

[0021] Preferably, it further includes:

[0022] A disc spring, which is arranged between the guide cover and the worm gear rod, and the upper end of the disc spring abuts against the guide cover;

[0023] A clearance adjusting gasket, which abuts against the lower end of the disc spring, and the lower end of the clearance adjusting gasket abuts against the worm gear rod.

[0024] Preferably, it further includes:

[0025] A second flat key, which is arranged on the lead screw and is adapted to the second key groove arranged on the central hole for preventing the lead screw from deflecting;

[0026] A dust-proof sealing ring, which is arranged at the end of the central hole for providing sealing performance with the lead screw.

[0027] Preferably, it further includes:

[0028] A fourth bearing and a fifth bearing, which are respectively arranged at both ends of the worm for rolling support of the worm;

[0029] A worm end cover, which is arranged at the rear end face of the worm cavity for closing the worm cavity;

[0030] Wherein, a sealing ring for improving the sealing performance is arranged between the worm end cover and the worm.

[0031] Preferably, it further includes:

[0032] An overload protection block, which is arranged in the cavity and is located below the central axis of the pressure wheel for providing overpressure protection.

[0033] Preferably, it further includes:

[0034] A top plate of the device, on which a housing installation groove is provided;

[0035] A pressure sensor, which is arranged above the housing installation groove and is used to abut against the overload protection block to measure the pressure;

[0036] An upper pressing wheel, which is connected to the free end of the lead screw;

[0037] A displacement sensor, which is arranged on the top plate of the device and is located on one side of the housing installation groove, and is used to detect the vertical position of the upper pressing wheel;

[0038] A proximity switch, which is arranged on one side of the displacement sensor and is used to control the stroke of the upper pressing wheel.

[0039] The beneficial effect of the present utility model is that: the reduction motor drives the worm to rotate, the worm drives the worm wheel to rotate, the worm wheel drives the worm rod to rotate through the first flat key, the worm rod is threadedly connected with the lead screw, and the lead screw moves up and down axially under the drive, so as to realize the adjustment of the pressing wheel. Description of the Drawings

[0040] Figure 1 It is a schematic diagram of an upper pressing wheel adjusting device of a tablet press of the present utility model.

[0041] Figure 2 For Figure 1 A-A cross-sectional view of

[0042] Figure 3 It is a schematic diagram of the housing in the present utility model.

[0043] Figure 4 It is an installation schematic diagram of the upper pressing wheel adjusting device of the tablet press and the top plate of the device in the present utility model. Detailed Embodiment

[0044] The following further describes the present utility model in detail with reference to the drawings, so that those skilled in the art can implement it according to the description in the specification.

[0045] It should be understood that the terms such as "having", "comprising" and "including" used herein do not exclude the presence or addition of one or other elements or their combinations.

[0046] As Figures 1-3 shown, an upper pressing wheel adjusting device 1 of a tablet press of the present utility model includes:

[0047] Inside the housing 110, there is an axial cavity 111; the worm gear 120 is rotatably arranged in the middle of the cavity 111, and a through hole is provided in the center of the worm gear 120; the worm cavity 112 is arranged on the housing 110 and is orthogonally arranged on one side of the cavity 111 and communicated with the cavity 111; the worm 130 is rotatably arranged in the worm cavity 112 and meshes with the worm gear 120, and the end of the worm 130 is connected to a reduction motor; and the worm rod 140 is arranged in the through hole and is connected to the worm gear 120 through a first flat key 191; an axial pipe cavity is provided in the center of the worm rod 140; the lead screw 150 is arranged in the pipe cavity, the outer circumference of the lead screw 150 is threadedly connected to the inner wall of the pipe cavity, and the free end of the lead screw 150 is connected to an upper pressure wheel; the guide cover 160 is detachably connected to the housing 110, and a central hole for the lead screw 150 to extend out is provided in the center of the guide cover 160. As a preference, the guide cover 160 is connected to the housing 110 through bolts 162, and a guide cover pressing pad 163 is further provided below the cap of the bolts 162.

[0048] During use, the reduction motor drives the worm 130 to rotate, the worm 130 drives the worm gear 120 to rotate, the worm gear 120 drives the worm rod 140 to rotate through the first flat key 191, the worm rod 140 is threadedly connected to the lead screw 150, and the lead screw 150 moves up and down axially under the drive to realize the adjustment of the pressure wheel.

[0049] In another embodiment, it further includes: a pressure wheel central shaft 170, which is arranged at the lower end of the worm rod 140; a first bearing 113, which is arranged in the cavity 111 and at the lower part of the cavity 111 for supporting the pressure wheel central shaft 170.

[0050] In another embodiment, it further includes: a second bearing 114, which is arranged in the middle and lower part of the cavity 111 for rotatably supporting the lower part of the worm gear 120; a third bearing 115, which is arranged in the middle and upper part of the cavity 111 for rotatably supporting the upper part of the worm gear 120; wherein, elastic retaining rings 116 are respectively provided at the upper edges of the second bearing 114 and the third bearing 115.

[0051] In another embodiment, it further includes: a first limiting groove 151 is provided on the outer circumference of the upper part of the lead screw 150; a first limiting block 141 is arranged at the upper end of the pipe cavity and is adapted to the first limiting groove 151 for limiting the rising distance of the lead screw 150.

[0052] In another embodiment, it further includes: a disc spring piece 181, which is arranged between the guide cover 160 and the worm rod 140, and the upper end of the disc spring piece 181 abuts against the guide cover 160;

[0053] A clearance adjustment spacer 182 is in contact with the lower end of the disc spring 181, and the lower end of the clearance adjustment spacer 182 is in contact with the worm rod 140.

[0054] In another embodiment, it further includes: In another embodiment, it further includes: A second flat key 192 is arranged on the lead screw 150 and is adapted to a second keyway arranged on the central hole to prevent the lead screw 150 from deflecting. A dust-proof sealing ring 161 is arranged at the end of the central hole to provide sealing with the lead screw 150.

[0055] In another embodiment, it further includes: A fourth bearing 131 and a fifth bearing 132 are respectively arranged at both ends of the worm 130 to rollingly support the worm 130; A worm end cover 133 is arranged on the rear end face of the worm cavity 112, and the worm 130 passes through the worm end cover 133; The worm end cover 133 is used to close the worm cavity 112; wherein, a sealing ring 134 for improving the sealing performance is arranged between the worm end cover 133 and the worm 130. As a preference, the worm end cover 133 and the worm cavity 112 are connected by bolts 135, and a washer 136 is arranged on the lower end face of the nut of the bolt 135.

[0056] In another embodiment, it further includes:

[0057] An overload protection block 171 is arranged in the cavity 111 and is located below the central axis 170 of the pressure wheel to provide overpressure protection.

[0058] In another embodiment, it further includes: An equipment top plate 200 is provided with a housing installation groove thereon;

[0059] A pressure sensor 210 is arranged above the housing installation groove to be in contact with the overload protection block 171 for measuring pressure; An upper pressure wheel 220 is connected to the free end of the lead screw 150; A displacement sensor 230 is arranged on the equipment top plate 220 and is located on one side of the housing installation groove to detect the vertical position of the upper pressure wheel 220; A proximity switch 240 is arranged on one side of the displacement sensor 230 to control the stroke of the upper pressure wheel 220.

[0060] To sum up, for a pressure wheel adjusting device 1 of a tablet press of the present utility model, the worm is rotated by a reduction motor, the worm drives the worm gear to rotate, the worm gear drives the worm rod to rotate through a first flat key, the worm rod is in threaded connection with the lead screw, and the lead screw moves up and down axially under transmission to realize the adjustment of the pressure wheel.

[0061] Although the embodiments of the present utility model have been disclosed as above, it is not limited to the applications listed in the description and embodiments. It can be fully applied to various fields suitable for the present utility model. For those familiar with the field, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and the equivalent scope, the present utility model is not limited to the specific details and the illustrated examples described herein.

Claims

1. A device for adjusting the upper pressing wheel of a tablet press, characterized in that, Comprising: A housing with an axial cavity inside. A worm gear rotatably arranged in the middle of the cavity, and a through hole is provided at the center of the worm gear. A worm cavity arranged on the housing, located on one side of the cavity and orthogonally arranged with the cavity, and the worm cavity communicates with the cavity. A worm rotatably arranged in the worm cavity and meshed with the worm gear, and the end of the worm is connected to a reduction motor; and A worm gear rod arranged in the through hole and connected to the worm gear by a first flat key; an axial tube cavity is provided at the center of the worm gear rod. A lead screw arranged in the tube cavity, the outer periphery of the lead screw is threadedly connected to the inner wall of the tube cavity, and the free end of the lead screw is connected to an upper pressure wheel. A guide cover detachably connected to the housing, and a central hole for the lead screw to extend out is provided at the center of the guide cover.

2. The upper punch adjusting device of the tablet press according to claim 1, wherein Further comprising: A pressure wheel central shaft arranged at the lower end of the worm gear rod. A first bearing arranged in the cavity and located at the lower part of the cavity for supporting the pressure wheel central shaft.

3. The upper punch adjusting device of the tablet press according to claim 2, characterized in that, Further comprising: A second bearing arranged in the middle and lower part of the cavity for rotatably supporting the lower part of the worm gear. A third bearing arranged in the middle and upper part of the cavity for rotatably supporting the upper part of the worm gear. Wherein, elastic retaining rings are respectively provided at the upper edges of the second bearing and the third bearing.

4. The upper punch adjusting device of the tablet press according to claim 3, characterized in that, Further comprising: A first limiting groove arranged on the outer periphery of the upper part of the lead screw. A first limiting block arranged at the upper end of the tube cavity and adapted to the first limiting groove for limiting the rising distance of the lead screw.

5. The upper punch adjusting device of the tablet press according to claim 4, characterized in that, Further comprising: A disc spring plate arranged between the guide cover and the worm gear rod, and the upper end of the disc spring plate abuts against the guide cover. A clearance adjusting gasket abuts against the lower end of the disc spring plate, and the lower end of the clearance adjusting gasket abuts against the worm gear rod.

6. The upper punch adjusting device of the tablet press according to claim 5, characterized in that, Further comprising: A second flat key arranged on the lead screw and adapted to a second key groove arranged on the central hole for preventing the lead screw from deflecting. A dust-proof sealing ring arranged at the end of the central hole for providing sealing with the lead screw.

7. The upper punch adjusting device of the tablet press according to claim 5, characterized in that, Further comprising: A fourth bearing and a fifth bearing respectively arranged at both ends of the worm for rollingly supporting the worm. A worm end cover arranged at the rear end face of the worm cavity for closing the worm cavity. Wherein, a sealing ring for improving the sealing performance is provided between the worm end cover and the worm.

8. The upper punch adjusting device of the tablet press according to claim 5, characterized in that, Further comprising: An overload protection block arranged in the cavity and located below the pressure wheel central shaft for providing overpressure protection.

9. The upper pressing wheel adjusting device of the tablet press according to claim 8, wherein, Further comprising: An equipment top plate with a housing installation groove thereon. A pressure sensor arranged above the housing installation groove for abutting against the overload protection block to measure pressure. An upper pressure wheel connected to the free end of the lead screw. A displacement sensor arranged on the equipment top plate and located on one side of the housing installation groove for detecting the vertical position of the upper pressure wheel. A proximity switch arranged on one side of the displacement sensor for controlling the stroke of the upper pressure wheel.

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