Cutting device of granulator

Abstract

A granulator cutting device comprises a driving device, a transmission assembly and a cutting assembly, and the cutting assembly is connected with the driving device through the transmission assembly; the cutting assembly comprises a cutter ring, a cutter rest, two balls and a plurality of blades, the cutter ring is connected to the transmission assembly, four first ball grooves are formed in the outer side wall of the cutter ring and are in central symmetry, a connecting hole is formed in the center of the cutter rest, and four second ball grooves are formed in the inner side wall of the connecting hole and are in central symmetry; the cutter ring is arranged in the connecting hole, one first ball groove and one corresponding second ball groove are oppositely arranged to form a mounting groove, and the two balls are mounted in the two opposite mounting grooves; and the plurality of blades are arranged on the knife rest. Compared with the prior art, the cutting device of the granulator is provided with the four ball grooves, when two of the ball grooves are abraded, the balls are arranged in the other two ball grooves, the whole cutter ring and the cutter rest do not need to be replaced, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the technical field of cutting devices, specifically relating to a granulator cutting device. Background Technology

[0002] The pellet mill cutting device is used to cut the extruded strips or sheets into the required pellet length. Some existing cutting devices include a drive unit, a transmission assembly, and a cutting assembly. The cutting assembly includes a blade ring, a blade holder, and blades. The blade ring is connected to the transmission assembly, the blade holder is connected to the blade ring, and the blades are connected to the blade holder. Under operating conditions, the drive unit drives the entire cutting assembly to rotate through the transmission assembly, and the blades of the cutting assembly perform cutting.

[0003] In existing technology, the outer wall of the cutter ring and the inner wall of the cutter holder each have two ball grooves. One ball groove in the cutter ring and one ball groove in the cutter holder cooperate to form a mounting groove that can accommodate the ball, ultimately forming two mounting grooves. Each mounting groove contains a ball, thus achieving a universal connection between the cutter ring and the cutter holder through the balls. During the use of the cutting device, the cutting components rotate at high speed. After a period of use, the ball grooves will wear into irregular shapes, which will lead to unstable transmission between the cutter ring and the cutter holder, affecting the pelletizing effect and production quality.

[0004] Since both the cutter ring and the tool holder only have two (one set) ball grooves, the solution to the above problem is to replace the cutter ring or the tool holder. The cutter ring and tool holder require high machining precision, resulting in high production costs, which further increases overall production costs. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a granulator cutting device.

[0006] To achieve the above objectives, this utility model discloses a granulator cutting device, including a driving device, a transmission assembly, and a cutting assembly, wherein the cutting assembly is connected to the driving device through the transmission assembly;

[0007] The cutting assembly includes a blade ring, a blade holder, two balls, and multiple blades. The blade ring is connected to the transmission assembly. The outer wall of the blade ring is provided with four first ball grooves, which are symmetrically arranged in the center. The blade holder is provided with a connecting hole at its center. The inner wall of the connecting hole is provided with four second ball grooves, which are symmetrically arranged in the center.

[0008] The blade ring is disposed in the connecting hole, and a first ball groove and a corresponding second ball groove are arranged opposite to each other to form a mounting groove, and two balls are installed in the two opposite mounting grooves.

[0009] The plurality of blades are mounted on a blade holder.

[0010] Preferably, the first groove on the inner sidewall of the connecting hole extends at least to one end of the tool holder, and the maximum distance between the first ball groove and the first groove is not less than the diameter of the ball.

[0011] There are four first grooves, which are symmetrically arranged in the center. The bottom of each first groove is provided with the second ball groove.

[0012] Preferably, the difference between the maximum distance between the first ball groove and the first recess and the diameter of the ball is 6mm to 6.5mm.

[0013] Preferably, the difference between the second ball grooves is 2mm to 3mm.

[0014] Preferably, the opening size of the first groove gradually increases to form a clearance opening.

[0015] Preferably, the blade ring has a threaded hole at its center, and the transmission assembly includes a connecting shaft, the end of which is threadedly connected to the threaded hole.

[0016] Preferably, the tool holder includes an integrally formed base and multiple connecting parts. The connecting hole is provided at the center of the base, and the multiple connecting parts are equally spaced on the outer side of the base along the circumferential direction. One blade is installed on one base.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] The outer wall of the cutter ring and the inner wall of the connecting hole of the cutter holder are respectively provided with four first ball grooves and four second ball grooves. The four first ball grooves and four second ball grooves are arranged symmetrically at the center. One first ball groove and one corresponding second ball groove are arranged opposite each other to form a mounting groove. Two balls are installed in the two opposite mounting grooves. In this way, when two of the mounting grooves are worn, the balls can be installed into the other two mounting grooves without replacing the entire cutter ring and cutter holder, which reduces maintenance costs.

[0019] The number of the first ball groove and the number of the second ball groove are specifically set to four. The design size of the ball groove is set according to the optimal operating effect to ensure the transmission effect. At the same time, it can also avoid the excessive number of ball grooves, which would result in too many ball grooves on the cutter ring and cutter post, ultimately affecting the overall structural strength and reducing the service life.

[0020] The four first and second ball grooves are symmetrically arranged, making the overall structure more uniform. This makes the operation of the cutting component more stable and improves the cutting effect. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the granulator cutting device in the embodiment;

[0022] Figure 2 for Figure 1 A three-dimensional structural diagram of the cutting component;

[0023] Figure 3 for Figure 2 A three-dimensional exploded view of the cutting component;

[0024] Drive unit 100;

[0025] Transmission assembly 200; connecting shaft 210;

[0026] Cutting assembly 300; blade ring 310; first ball groove 311; threaded hole 312; blade holder 320; base 330; connecting hole 331; first groove 332; second ball groove 333; clearance opening 334; connecting part 340;

[0027] Ball bearing 400;

[0028] Blade 500. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] A granulator cutting device, see Figures 1-3 It includes a drive device 100, a transmission assembly 200 and a cutting assembly 300. The cutting assembly 300 is connected to the drive device 100 through the transmission assembly 200. The drive device 100 is specifically a motor. The rotation of the motor drives the transmission assembly to rotate, which in turn drives the cutting assembly to rotate, and the cutting assembly performs cutting.

[0031] In this embodiment, the cutting assembly includes a blade ring 310, a blade holder 320, two balls 400, and multiple blades 500. The blade ring 310 is connected to the transmission assembly. The outer wall of the blade ring 310 has four first ball grooves 311, which are symmetrically arranged. The blade holder 320 has a connecting hole 331 at its center. The inner wall of the connecting hole 331 has four second ball grooves 333, which are symmetrically arranged. The blade ring 310 is disposed in the connecting hole 331. One first ball groove 311 and one corresponding second ball groove 333 are arranged opposite each other to form a mounting groove. Two balls are installed in two opposite mounting grooves. Thus, when two mounting grooves are worn, the balls can be installed into the other two mounting grooves without replacing the entire blade ring 310 and blade holder 320, which reduces maintenance costs. The number of first ball grooves 311 and second ball grooves 333 is specifically set to four. The design dimensions of the ball grooves are set according to the optimal operating effect to ensure transmission efficiency. At the same time, it also avoids having too many ball grooves, which would result in too many ball grooves on the cutter ring 310 and cutter holder 320, ultimately affecting the overall structural strength and reducing service life. The four first and second ball grooves 333 are centrally symmetrically arranged, making the overall structure more symmetrical. This makes the operation of the cutting component more stable and improves the cutting effect.

[0032] In this embodiment, multiple blades 500 are disposed on the tool holder 320. Specifically, the tool holder 320 includes an integrally formed base 330 and multiple connecting parts 340. A connecting hole 331 is provided at the center of the base 330. The multiple connecting parts 340 are equally spaced on the outer side of the base 330 along the circumferential direction. One blade 500 is mounted on one base 330.

[0033] In this embodiment, the inner wall of the connecting hole 331 has a first groove 332, which extends at least to one end of the tool holder 320. In this embodiment, the first groove 332 extends through both ends of the tool holder 320. The maximum distance between the first ball groove 311 and the first groove 332 is not less than the diameter of the ball. There are four first grooves 332, which are symmetrically arranged in a center. Each first groove 332 has a second ball groove 333 at its bottom. With the first grooves 332 arranged such that their maximum distance from the first ball groove 311 is not less than the diameter of the ball, during assembly, the ball is first placed into the first ball groove 311, and then the blade ring 310 and the ball as a whole are placed into the connecting hole 331 of the tool holder 320 along the first groove 332, which facilitates installation. In actual use, under the action of water flow in the pelletizer's water chamber, the balls move to one side. At this time, the balls move from the first ball groove 311 to the second ball groove 333 and are thus stuck in the two ball grooves, which can ultimately restrict the axial movement of the cutter holder 320.

[0034] In order to ensure convenient installation of the ball bearings, and to avoid the problem of unstable assembly of the tool holder 320 due to excessive distance between the first ball bearing groove 311 and the first groove 332, the difference between the maximum distance between the first ball bearing groove 311 and the first groove 332 and the diameter of the ball bearing is 6mm to 6.5mm, preferably 6.2mm.

[0035] To ensure that the balls can be reliably locked in the two ball grooves during use, in this embodiment, the difference between the two ball grooves 333 is 2mm to 3mm, and preferably, its depth is 2.8mm.

[0036] In this embodiment, the four second ball grooves are connected to form an annular groove, and the balls can rotate within the annular groove, which further reduces rotational resistance.

[0037] In this embodiment, the opening size of the first groove 332 gradually increases to form an avoidance opening 334, which facilitates the installation of the ball bearings and reduces the rotational resistance of the cutter ring 310 and the cutter holder 320, thereby reducing ball bearing wear and increasing service life.

[0038] In this embodiment, the blade ring 310 has a threaded hole 312 at its center, and the transmission assembly includes a connecting shaft 210. The end of the connecting shaft 210 is threadedly connected to the threaded hole 312. This connection structure is simple and easy to assemble and process.

[0039] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A granulator cutting device, characterized in that: It includes a drive unit, a transmission assembly, and a cutting assembly, wherein the cutting assembly is connected to the drive unit through the transmission assembly; The cutting assembly includes a blade ring, a blade holder, two balls, and multiple blades. The blade ring is connected to the transmission assembly. The outer wall of the blade ring is provided with four first ball grooves, which are symmetrically arranged in the center. The blade holder is provided with a connecting hole at its center. The inner wall of the connecting hole is provided with four second ball grooves, which are symmetrically arranged in the center. The blade ring is disposed in the connecting hole, and a first ball groove and a corresponding second ball groove are arranged opposite to each other to form a mounting groove, and two balls are installed in the two opposite mounting grooves. The plurality of blades are mounted on a blade holder.

2. The granulator cutting device according to claim 1, characterized in that: The inner wall of the connecting hole has a first groove, which extends at least to one end of the tool holder, and the maximum distance between the first ball groove and the first groove is not less than the diameter of the ball. There are four first grooves, which are symmetrically arranged in the center. The bottom of each first groove is provided with the second ball groove.

3. The granulator cutting device according to claim 2, characterized in that: The difference between the maximum distance between the first ball groove and the first recess and the diameter of the ball is 6mm to 6.5mm.

4. The granulator cutting device according to claim 2, characterized in that: The difference between the second ball grooves is 2mm to 3mm.

5. The granulator cutting device according to claim 2, characterized in that: The opening size of the first groove gradually increases to form a clearance opening.

6. The granulator cutting device according to claim 1, characterized in that: The blade ring has a threaded hole at its center, and the transmission assembly includes a connecting shaft, the end of which is threadedly connected to the threaded hole.

7. The granulator cutting device according to claim 1, characterized in that: The tool holder includes an integrally formed base and multiple connecting parts. The connecting hole is provided at the center of the base, and the multiple connecting parts are equally spaced on the outer side of the base along the circumferential direction. One blade is installed on each base.

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