Gear box structure of rotary granulator

Abstract

The utility model discloses a gear box structure of a rotary granulator. The gear box structure is composed of an input shaft assembly, a box body assembly and an output shaft assembly. The input shaft assembly is composed of a cylindrical gear a, a double-row angular contact ball bearing, a driving shaft, a deep groove ball bearing, a sleeve, a cover plate a, a round nut lock washer a and a round nut a, and the box body assembly is composed of a panel weldment, a gearbox bottom plate weldment and a gearbox side cover plate. According to the utility model, the gear pair structure is simplified, so that the processing, assembling and maintaining difficulty of the gear box is reduced, the production cost is greatly reduced, the noise in the production process is greatly reduced, the requirement of respectively controlling the granulation rotating speed and the material pressing rotating speed is met, and the problems of dislocation of the bearing and the gear and movement during working are well solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary granulators, in particular to a gearbox structure of a rotary granulator. Background Art

[0002] In practical applications, the gearbox of a rotary granulator has multiple gear pair structures, which have high processing requirements for gears and gearboxes, resulting in long processing time and high cost; the processing errors and installation errors of each part are large, leading to high noise during the operation of the equipment; and during the installation process, due to the large number of parts and high requirements, the installation and maintenance costs of the equipment are high; under long-term working conditions, the bearings and gears are prone to displacement, which easily causes equipment damage and increases the equipment maintenance cost. Summary of the Utility Model

[0003] In order to solve the problems of high noise, difficult installation and maintenance, misalignment of bearings and gears, and displacement during operation in the installation and use of the existing rotary granulation gearbox, the utility model provides a gearbox structure of a rotary granulator.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A gearbox structure of a rotary granulator is composed of an input shaft assembly, a box body assembly and an output shaft assembly; the input shaft assembly is composed of a cylindrical gear a, a double-row angular contact ball bearing, a driving shaft, a deep groove ball bearing, a sleeve, a cover plate a, a round nut locking washer a and a round nut a; the box body assembly is composed of a panel weldment, a gearbox bottom plate weldment and a gearbox side cover plate; the output shaft assembly is composed of a pressing shaft, a round nut b, a round nut locking washer b, a tapered roller bearing a, a bush, a cylindrical gear b, a bush b, a tapered roller bearing b, a round nut with a locking groove, a granulating shaft, a deep groove ball bearing b, a double-row angular contact ball bearing b and a cover plate b.

[0006] Preferably, the driving shaft is connected to an external speed reducer, and the double-row angular contact ball bearing is locked on the driving shaft through a round nut locking washer a and a round nut a; the end face of the cover plate a is attached to the outer circle end face of the double-row angular contact ball bearing and then fastened to the gearbox bottom plate weldment to complete the limit of the driving shaft; the cylindrical gear a is matched with the driving shaft through a spline, and the sleeve and the deep groove ball bearing are sequentially installed on the upper end face of the cylindrical gear a and then positioned with the panel weldment to complete the axial positioning of the cylindrical gear a.

[0007] Preferably, the granulating shaft is a hollow shaft, and the material pressing shaft is limited and fastened at the center of the granulating shaft through deep groove ball bearing b, angular contact ball bearing b with double rows, and cover plate b; circular nut b, circular nut locking washer b, tapered roller bearing a, shaft sleeve, cylindrical gear b, shaft sleeve b, tapered roller bearing b and circular nut with locking groove cooperate to complete the axial positioning of the cylindrical gear b and the granulating shaft; the upper end face of the outer circle of the tapered roller bearing a fits with the stop face of the bearing chamber of the gearbox bottom plate welded part, and the lower end face of the outer circle of the tapered roller bearing b fits with the stop face of the bearing chamber of the panel welded part, and the cooperation completes the positioning of the granulating shaft and the cylindrical gear b.

[0008] Preferably, the gearbox bottom plate welded part and the panel welded part are positioned by cylindrical pins and fastened by screws; the side cover plate of the gearbox is connected to the gear bottom plate welded part by screws, and the gearbox is assembled by three parts, namely the panel welded part, the gearbox bottom plate welded part, and the gearbox side cover plate, through screws.

[0009] Compared with the prior art, the beneficial effects of the present utility model are as follows: by simplifying the gear pair structure, the present utility model reduces the processing, assembly, and maintenance difficulties of the gearbox, greatly reduces the production cost and the noise problem during the production process, realizes the requirement of separately controlling the granulating and material pressing speeds, and preferably solves the problems of misalignment of bearings and gears and axial movement during operation. Brief Description of the Drawings

[0010] Figure 1 is the front view structural schematic diagram of the embodiment of the present utility model;

[0011] Figure 2 is Figure 1 the sectional structural schematic diagram of A-A in

[0012] Figure 3 is Figure 1 the sectional structural schematic diagram of B-B in

[0013] Figure 4 is Figure 1 the sectional structural schematic diagram of C-C in

[0014] In the figure: A, box body assembly; B, input shaft assembly; C, output shaft assembly; 1, cylindrical gear a; 2, angular contact ball bearing with double rows; 3, driving shaft; 4, deep groove ball bearing; 5, sleeve; 6, cover plate a; 7, circular nut locking washer a; 8, circular nut a; 9, panel welded part; 10, gearbox bottom plate welded part; 11, gearbox side cover plate; 12, material pressing shaft; 13, circular nut b; 14, circular nut locking washer b; 15, tapered roller bearing a; 16, shaft sleeve; 17, cylindrical gear b; 18, shaft sleeve b; 19, tapered roller bearing b; 20, circular nut with locking groove; 21, granulating shaft; 22, deep groove ball bearing b; 23, angular contact ball bearing b with double rows; 24, cover plate b. Specific Embodiments

[0015] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present utility model.

[0016] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments.

[0017] As Figures 1 to 4 shown, the embodiment of the present utility model is composed of three parts: an input shaft assembly A, a box body assembly B, and an output shaft assembly C; the input shaft assembly A is composed of a cylindrical gear a1, a double-row angular contact ball bearing 2, a driving shaft 3, a deep groove ball bearing 4, a sleeve 5, a cover plate a6, a round nut stop washer a7, and a round nut a8; the box body assembly B is composed of a panel welded part 9, a gearbox bottom plate welded part 10, and a gearbox side cover plate 11; the output shaft assembly C is composed of a pressure shaft 12, a round nut b13, a round nut stop washer b14, a tapered roller bearing a15, a bushing 16, a cylindrical gear b17, a bushing b18, a tapered roller bearing b19, a round nut with locking groove 20, a granulating shaft 21, a deep groove ball bearing b22, a double-row angular contact ball bearing b23, and a cover plate b24.

[0018] The process steps for assembling the gearbox structure are as follows:

[0019] Process 1: After gently pressing the double-row angular contact ball bearing 2 onto the bearing position of the driving shaft 3, place the round nut stop washer a7 and tighten the round nut a8;

[0020] Process 2: Gently press the input shaft assembly onto the bearing position of the bearing chamber of the gearbox bottom plate welded part 10, then place the cover plate a6 and fasten the cover plate a6 with an external hexagon screw;

[0021] Process 3: Install the cylindrical gear a1, sleeve 5, and deep groove ball bearing 6 on the driving shaft 3 in sequence for assembly;

[0022] Process 4: Gently press the deep groove ball bearing b22 and the double-row angular contact ball bearing 23 onto the bearing position of the pressure shaft 12; then gently press the output shaft assembly onto the upper bearing chamber of the granulating shaft 21 and fasten the cover plate b24;

[0023] Process 5: Gently press the tapered roller bearing a15 onto the bearing position of the granulating shaft 21, add the round nut stop washer b14, pre-tighten the round nut b15, and then gently press the output shaft assembly onto the bearing chamber of the gearbox bottom plate welded part 10;

[0024] Process 6: Assemble the bushing 16, cylindrical gear b17, and bushing b18 onto the granulating shaft 21 in sequence;

[0025] Process 7: Mesh the cylindrical gear b17 and the cylindrical gear a1, tighten the round nut b15, fasten the gearbox side cover plate 11 onto the gearbox bottom plate welded part 10, and add grease;

[0026] Process 8: After positioning the panel welded part 9 and the gearbox bottom plate welded part 10 with a pin, fasten the panel welded part 9 and the gearbox bottom plate welded part 10 with an external hexagonal screw;

[0027] Process 9: Gently press the tapered roller bearing b19 onto the bearing chamber position of the panel welded part 9, and then fasten the round nut with a locking groove 20 to the tapered roller bearing b19.

[0028] When the rotating granulator gearbox is working, the driving shaft 3 will rotate due to the force provided by the motor. The driving shaft 6 drives the cylindrical gear a1 to rotate through spline transmission. The cylindrical gear a1 and the cylindrical gear b17 mesh to drive the cylindrical gear b17 to rotate. The cylindrical gear b17 drives the granulating shaft 21 to rotate through flat key transmission. The rotation of the granulating shaft 21 drives the granulating knives fastened thereon to rotate and extrude the materials in the working chamber to complete granulation. The pressing shaft 12 is directly connected to the hollow shaft reducer to drive the pressing shaft 12 to rotate, thereby driving the pressing knives to perform a spinning motion to press the materials into the working chamber. The transmission is completed only through a set of gear pairs, which simplifies the gearbox installation process, reduces the processing and maintenance costs of the gearbox, solves the problem of the gear shifting during misaligned work, and greatly reduces the working noise of the rotating granulator.

[0029] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The gearbox structure of a rotary granulator is composed of three parts: an input shaft assembly, a box body assembly, and an output shaft assembly; it is characterized in that: The input shaft assembly consists of cylindrical gear a, double-row angular contact ball bearing, driving shaft, deep groove ball bearing, sleeve, cover plate a, round nut lock washer a and round nut a. The housing assembly consists of panel weldment, gearbox bottom plate weldment and gearbox side cover plate. The output shaft assembly consists of pressure shaft, round nut b, round nut lock washer b, tapered roller bearing a, bush, cylindrical gear b, bush b, tapered roller bearing b, round nut with locking groove, pelletizing shaft, deep groove ball bearing b, double-row angular contact ball bearing b and cover plate b.

2. The gearbox structure of a rotary granulator according to claim 1, wherein: The driving shaft is connected to an external speed reducer. The double-row angular contact ball bearing is locked on the driving shaft through round nut lock washer a and round nut a. The end face of cover plate a is fitted to the outer circle end face of the double-row angular contact ball bearing and then fastened to the gearbox bottom plate weldment to complete the positioning of the driving shaft. Cylindrical gear a is fitted to the driving shaft through splines. The sleeve and deep groove ball bearing are sequentially installed on the upper end face of cylindrical gear a and then positioned with the panel weldment to complete the axial positioning of cylindrical gear a.

3. The gearbox structure of a rotary granulator according to claim 1, characterized in that: The pelletizing shaft is a hollow shaft. The pressure shaft is limited and fastened at the axis of the pelletizing shaft through deep groove ball bearing b, double-row angular contact ball bearing b and cover plate b. Round nut b, round nut lock washer b, tapered roller bearing a, bush, cylindrical gear b, bush b, tapered roller bearing b and round nut with locking groove cooperate to complete the axial positioning of cylindrical gear b and the pelletizing shaft. The upper end face of the outer circle of tapered roller bearing a is fitted to the stop face of the bearing chamber of the gearbox bottom plate weldment, and the lower end face of the outer circle of tapered roller bearing b is fitted to the stop face of the bearing chamber of the panel weldment to cooperate to complete the positioning of the pelletizing shaft and cylindrical gear b.

4. The gearbox structure of a rotary granulator according to claim 1, characterized in that: The gearbox bottom plate weldment and the panel weldment are positioned by cylindrical pins and fastened by screws. The gearbox side cover plate is connected to the gear bottom plate weldment by screws. The gearbox is assembled by three components, namely the panel weldment, the gearbox bottom plate weldment and the gearbox side cover plate, through screws.

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