Simple and reliable grinder

Abstract

The utility model discloses a simple and reliable grinder which comprises a grinding support, a lower cutterhead assembly is rotatably arranged in the grinding support and connected with a rotating shaft, a bearing mounting groove is formed in the grinding support, a bearing element is arranged in the bearing mounting groove, and the lower cutterhead assembly is connected with the rotating shaft. An elastic element for applying downward acting force to the bearing element is arranged in a bearing mounting groove above the bearing element, and the rotating shaft is arranged in the bearing element and is connected with an inner ring of the bearing element. According to the utility model, the lower cutter head assembly and the bearing element form a pair of static moving parts, and the bearing element can be tightly pressed in the bearing mounting groove under the action of the elastic force of the elastic element, so that the axial movement of the bearing element and the lower cutter head assembly is inhibited as much as possible, and the axial shaking of the lower cutter head assembly is reduced.

Description

Technical Field

[0001] The utility model relates to a simple and reliable grinder. Background Art

[0002] The existing flat blade grinder has two identical upper and lower blade discs arranged axially, and the object to be ground is horizontally ground between the upper and lower blade discs and then thrown out radially from the outer side of the blade disc.

[0003] In the existing structure, the axial gap between the two cutter discs has a particularly great influence on the coarseness of the grinded object. In order to reduce the gap change caused by the shaking of the lower cutter disc, the existing flat blade grinder is usually designed to use a thrust bearing and a ball bearing in combination. This method of using double bearings to reduce the gap change caused by the shaking of the lower cutter disc is not only complicated to assemble, but also relatively expensive.

[0004] For this reason, a simple and reliable grinder with simple assembly and capable of ensuring the axial clearance of the lower cutter disc is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a grinder which is simple and reliable, easy to assemble and can ensure the axial clearance of the lower cutter disc.

[0006] A simple and reliable grinder designed for this purpose comprises a grinding bracket, a lower cutter disc assembly is rotatably arranged in the grinding bracket, the lower cutter disc assembly is connected to a rotating shaft, a bearing mounting groove is arranged in the grinding bracket, a bearing element is arranged in the bearing mounting groove, an elastic element applying a downward force to the bearing element is arranged in the bearing mounting groove above the bearing element, and the rotating shaft is arranged in the bearing element and connected to the inner ring of the bearing element.

[0007] Preferably, the upper end of the bearing mounting groove is opened, the bearing element and the elastic element are assembled into the bearing mounting groove from top to bottom, a pressure plate is provided in the grinding bracket above the bearing mounting groove, the lower end of the elastic element contacts the upper surface of the bearing element, and the upper end thereof contacts the pressure plate.

[0008] Preferably, a sealing ring is provided in the grinding bracket and fits with the lower end surface of the lower cutter disc assembly.

[0009] Preferably, the pressing plate is fixedly mounted on the grinding bracket by bolts.

[0010] Preferably, the lower cutter disc assembly is also provided with a transmission coupling and a threaded connection extending downwardly, a transmission gear is provided below the grinding bracket, the transmission coupling is plugged and coupled with the transmission coupling groove of the transmission gear, and a locking bolt is passed through the transmission gear and threadedly connected with the threaded connection.

[0011] Preferably, a flat washer and an anti-slip washer are provided between the bolt head of the locking bolt and the lower end surface of the transmission gear.

[0012] Preferably, an upper cutter disc assembly is detachably connected to a grinding bracket above the lower cutter disc assembly.

[0013] Preferably, the bearing element is an angular contact bearing.

[0014] Preferably, the elastic element is a butterfly spring.

[0015] Compared with the prior art, the utility model comprises a grinding bracket, a lower cutter disc assembly is rotatably arranged in the grinding bracket, the lower cutter disc assembly is connected with a rotating shaft, a bearing installation groove is arranged in the grinding bracket, a bearing element is arranged in the bearing installation groove, an elastic element for applying a downward force to the bearing element is arranged in the bearing installation groove above the bearing element, the rotating shaft is arranged in the bearing element and connected to the inner ring of the bearing element. The lower cutter disc assembly and the bearing element form a pair of stationary moving parts, and under the elastic force of the elastic element, the bearing element can be tightly pressed in the bearing installation groove, thereby suppressing the axial movement of the bearing element and the lower cutter disc assembly as much as possible, so as to reduce the axial shaking of the lower cutter disc assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded structure of the utility model. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0019] See also Figure 1-Figure 2 A simple and reliable grinder comprises a grinding bracket 8, a lower cutter disc assembly 2 is rotatably arranged in the grinding bracket 8, the lower cutter disc assembly 2 is connected with a rotating shaft 21, a bearing mounting groove 14 is arranged in the grinding bracket 8, a bearing element 7 is arranged in the bearing mounting groove 14, an elastic element 6 for applying a downward force to the bearing element 7 is arranged in the bearing mounting groove 14 above the bearing element 7, and the rotating shaft 21 is arranged in the bearing element 7 and connected to the inner ring of the bearing element 7.

[0020] Based on the above embodiment, the lower cutter disc assembly and the bearing element form a relatively static moving part. Under the elastic force of the elastic element, the bearing element can be pressed tightly into the bearing mounting groove, thereby suppressing the axial movement of the bearing element and the lower cutter disc assembly as much as possible, so as to reduce the axial shaking of the lower cutter disc assembly and ensure the clearance between the lower cutter disc assembly and the upper cutter disc assembly.

[0021] See also Figure 1 and Figure 2 The upper end of the bearing mounting groove 14 is open, and the bearing element 7 and the elastic element 6 are assembled into the bearing mounting groove 14 from top to bottom. A pressure plate 5 is provided in the grinding bracket 8 above the bearing mounting groove 14, and the lower end of the elastic element 6 contacts the upper surface of the bearing element 7, and the upper end thereof contacts the pressure plate 5.

[0022] See also Figure 1 and Figure 2 A sealing ring 3 is provided in the grinding bracket 8 and is in contact with the lower end surface of the lower cutter disc assembly 2.

[0023] See also Figure 1 and Figure 2 The pressing plate 5 is fixedly mounted on the grinding bracket 8 by bolts 4 .

[0024] See also Figure 1 and Figure 2 The lower cutter disc assembly 2 is also provided with a transmission coupling 22 and a threaded connection 23 extending downward. A transmission gear 9 is provided below the grinding bracket 8. The transmission coupling 22 is plugged and coupled with the transmission coupling groove 91 of the transmission gear 9. A locking bolt 12 is passed through the transmission gear 9 and is threadedly connected with the threaded connection 23.

[0025] In the present invention, a flat washer 10 and an anti-slip washer 11 are arranged between the bolt head of the locking bolt 12 and the lower end surface of the transmission gear 9 .

[0026] See also Figure 2 The upper cutter disc assembly 1 is detachably connected to the grinding bracket 8 above the lower cutter disc assembly 2.

[0027] In the present invention, the bearing element 7 adopts an angular contact bearing. The rotating shaft 21 is tightly sleeved on the inner ring of the angular contact bearing, and the angular contact bearing can provide good coaxiality for the rotation of the lower cutter disc assembly 2. Furthermore, the inner ring of the angular contact bearing has a larger supporting surface diameter than other existing bearings. When the rotating shaft 21 is on the inner ring of the angular contact bearing, the angular contact bearing also provides the rotating shaft 21 with a smaller tilting and shaking angle in the horizontal direction, further reducing the shaking of the lower cutter disc assembly.

[0028] Further, a thrust portion 24 is provided on the lower cutter disc assembly 2, and the lower end surface of the thrust portion 24 is in contact with the upper end surface of the inner ring of the bearing element 7. The thrust portion 24 is in contact with the inner ring of the bearing element 7, and the bearing element 7 can provide a thrust force for the thrust portion 24, so as to provide a supporting force for the lower cutter disc assembly 2.

[0029] In the present invention, the elastic element 6 is a butterfly spring.

[0030] In the present invention, the grinding bracket 8 is connected to a driving assembly 13 , and the driving assembly 13 is drivingly connected to the driving gear 9 .

[0031] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0033] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A simple and reliable grinder, comprising a grinding bracket (8), wherein a lower cutter disc assembly (2) is rotatably arranged in the grinding bracket (8), and the lower cutter disc assembly (2) is connected to a rotating shaft (21), characterized in that: A bearing mounting groove (14) is provided in the grinding bracket (8), a bearing element (7) is provided in the bearing mounting groove (14), an elastic element (6) for applying a downward force to the bearing element (7) is provided in the bearing mounting groove (14) above the bearing element (7), and the rotating shaft (21) is provided in the bearing element (7) and connected to the inner ring of the bearing element (7).

2. A simple and reliable grinder according to claim 1, characterized in that: The upper end of the bearing mounting groove (14) is open, and the bearing element (7) and the elastic element (6) are assembled into the bearing mounting groove (14) from top to bottom. A pressure plate (5) is arranged in the grinding bracket (8) above the bearing mounting groove (14), and the lower end of the elastic element (6) contacts the upper surface of the bearing element (7), and the upper end of the elastic element (6) contacts the pressure plate (5).

3. A simple and reliable grinder according to claim 1, characterized in that: A sealing ring (3) is arranged inside the grinding bracket (8) and is fitted with the lower end surface of the lower cutter disc assembly (2).

4. A simple and reliable grinder according to claim 2, characterized in that: The pressing plate (5) is fixedly mounted on the grinding bracket (8) by means of bolts (4).

5. A simple and reliable grinder according to claim 1, characterized in that: The lower cutter disc assembly (2) is also provided with a transmission coupling member (22) and a threaded connection member (23) extending downwards. A transmission gear (9) is provided below the grinding bracket (8). The transmission coupling member (22) is plug-coupled with a transmission coupling groove (91) of the transmission gear (9). A locking bolt (12) is passed through the transmission gear (9) and is threadedly connected to the threaded connection member (23).

6. A simple and reliable grinder according to claim 5, characterized in that: A flat washer (10) and an anti-slip washer (11) are arranged between the bolt head of the locking bolt (12) and the lower end surface of the transmission gear (9).

7. A simple and reliable grinder according to claim 1, characterized in that: The upper cutter disc assembly (1) is detachably connected to the grinding bracket (8) above the lower cutter disc assembly (2).

8. A simple and reliable grinder according to claim 1, characterized in that: The bearing element (7) is an angular contact bearing.

9. A simple and reliable grinder according to claim 1, characterized in that: The elastic element (6) is a butterfly spring.

10. A simple and reliable grinder according to claim 1, characterized in that: The lower cutter disc assembly (2) is provided with a thrust portion (24), and the lower end surface of the thrust portion (24) is in contact with the upper end surface of the inner ring of the bearing element (7).

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