An eccentric grinding head

Abstract

The utility model belongs to the technical field of grinding head discloses an eccentric grinding head, including the casing and plum blossom coupling, the casing fixed connection is in the drive part shell, its one side fixed connection has the upper cover, the plum blossom coupling is fixed in the drive part output end, its one side fixed connection has eccentric shaft sleeve, the eccentric shaft sleeve rotates in the casing, its outer surface is equipped with graphite seal ring, the upper cover is in graphite seal ring outside, eccentric rotating shaft is rotationally installed in the eccentric shaft sleeve inboard, the eccentric rotating shaft outside fixed connection has the grinding disc, the middle part of casing is equipped with annular accommodation groove near the upper cover side, graphite seal ring is installed in the accommodation groove, the outer surface of eccentric rotating shaft one end is equipped with a plurality of first bearing. The utility model discloses through setting up graphite seal ring between the casing and eccentric shaft sleeve, can effectively block the invasion of outside impurity, solved the problem that traditional rubber sealing element is easy to cause the change of gap and failure because of movement.

Description

Technical Field

[0001] This utility model belongs to the field of grinding head technology, specifically relating to an eccentric grinding head. Background Technology

[0002] In the field of machining, eccentric grinding heads are widely used for polishing high-precision surfaces such as molds and shaft parts. In existing technologies, the seal between the eccentric bushing and the housing is mostly made of a single-layer rubber sealing ring. However, the traditional single-layer sealing structure is prone to failure due to gap changes caused by wear of the seal when rotating at high speed or when grinding media enters. This allows external impurities to enter the housing, which will aggravate the wear of the eccentric bushing and lead to a decrease in the operating accuracy of the equipment. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides an eccentric grinding head, aiming to solve to some extent the technical problem that in the prior art, the seal between the eccentric bushing and the housing is mostly made of a single-layer rubber sealing ring. However, the traditional single-layer sealing structure is prone to failure due to gap changes caused by wear of the sealing element when rotating at high speed or when grinding media intrudes, which causes external impurities to enter the housing, exacerbates the wear of the eccentric bushing, and leads to a decrease in the operating accuracy of the equipment.

[0004] The technical solution of this utility model is: an eccentric grinding head, including a housing and a plum blossom coupling, wherein the housing is fixedly connected to the outer shell of the drive component, and a top cover is fixedly connected to one side of the housing.

[0005] The plum blossom coupling is fixed to the output end of the drive component, and an eccentric bushing is fixedly connected to one side of it.

[0006] The eccentric bushing rotates inside the housing, and a graphite sealing ring is fitted on its outer surface. The upper cover abuts against the outside of the graphite sealing ring.

[0007] An eccentric shaft is rotatably mounted on the inner side of the eccentric bushing, and a grinding disc is fixedly connected to the outer side of the eccentric shaft.

[0008] In some embodiments, the housing has an annular receiving groove in the middle of the side near the top cover, and the graphite sealing ring is installed in the receiving groove.

[0009] In some embodiments, a plurality of first bearings are sleeved on the outer surface of one end of the eccentric shaft, and the outer ring of the first bearing is fixed to the inner wall of the eccentric shaft sleeve.

[0010] In some embodiments, a bearing cap is fixedly connected to the middle part of the plum blossom coupling near the eccentric bushing, and the end face of the bearing cap abuts against the end face of the outer ring of the first bearing.

[0011] In some embodiments, a pressure plate is fixedly connected to the end of the eccentric shaft, and the end face of the pressure plate abuts against the end face of the inner ring of the first bearing.

[0012] In some embodiments, the outer surface of the eccentric bushing is fitted with a plurality of second bearings, the outer rings of the second bearings being fixed to the inner wall of the housing.

[0013] In some embodiments, a lower cover is fixedly connected to the inner wall of the opening end of the housing, and the inner end face of the lower cover abuts against the end face of the outer ring of the second bearing.

[0014] The inner end face of the plum blossom coupling abuts against the inner ring end face of the second bearing.

[0015] In some embodiments, a plurality of counterweights are evenly distributed around the outer edge of the top cover, and the counterweights are fixedly connected to the top cover.

[0016] In some embodiments, the outer surface of the lower cover is provided with an annular sealing groove, and an O-ring is embedded in the sealing groove.

[0017] In some embodiments, the connection surfaces of the housing and the drive housing are provided with positioning holes.

[0018] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0019] 1. By setting a graphite sealing ring between the housing and the eccentric bushing, external impurities can be effectively prevented from entering, solving the problem that traditional rubber seals are prone to failure due to gap changes caused by movement.

[0020] 2. By adopting a first bearing support structure between the eccentric bushing and the eccentric shaft, and with the axial limiting design of the bearing cover and pressure plate, the stability of the eccentric shaft movement is improved. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model in use;

[0024] Figure 3 This is a front view of the structure of this utility model;

[0025] Figure 4 This is a cross-sectional view of the structure of this utility model;

[0026] Figure 5 This is a schematic diagram of the shell structure of this utility model;

[0027] Figure 6 This is a schematic diagram of the plum blossom coupling structure of this utility model;

[0028] Figure 7 This is a schematic diagram of the eccentric rotating shaft structure of this utility model.

[0029] In the attached image:

[0030] 1. Housing; 101. Receiving groove; 2. Graphite sealing ring; 3. Upper cover; 4. Lower cover; 5. Plum blossom coupling; 6. Eccentric bushing; 7. Bearing cover; 8. Eccentric shaft; 9. Pressure plate; 10. Counterweight; 11. Grinding disc; 12. O-ring; 13. First bearing; 14. Second bearing. Detailed Implementation

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0032] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0033] like Figures 1-7 As shown, an eccentric grinding head includes a housing 1 and a plum blossom coupling 5. The housing 1 is fixedly connected to the outer shell of the drive component, and a top cover 3 is fixedly connected to one side of the housing.

[0034] The plum blossom coupling 5 is fixed to the output end of the drive component, and an eccentric bushing 6 is fixedly connected to one side of it.

[0035] The eccentric bushing 6 rotates inside the housing 1, and a graphite sealing ring 2 is fitted on its outer surface. The upper cover 3 abuts against the outside of the graphite sealing ring 2.

[0036] An eccentric shaft 8 is rotatably mounted inside the eccentric bushing 6, and a grinding disc 11 is fixedly connected to the outside of the eccentric shaft 8. A graphite sealing ring 2 is provided between the housing 1 and the eccentric bushing 6, which can effectively prevent the intrusion of external impurities and solve the problem that traditional rubber seals are prone to failure due to gap changes caused by movement.

[0037] like Figure 5 As shown, the housing 1 has an annular receiving groove 101 in the middle of the side near the top cover 3, and the graphite sealing ring 2 is installed in the receiving groove 101.

[0038] In this embodiment, during installation, grease is applied to the surface of the graphite sealing ring 2, and then it is pressed into the receiving groove 101 by interference fit. The upper cover 3 is locked to the housing 1 by bolts, so that the inner wall plane of the upper cover 3 is tightly pressed against the outer edge of the graphite sealing ring 2. Utilizing the self-lubricating properties of graphite material and the limiting effect of the receiving groove 101, the graphite sealing ring 2 always maintains line contact sealing with the upper cover 3 when the eccentric bushing 6 rotates at high speed, effectively preventing grinding dust from entering the housing 1, and avoiding the sealing failure problem caused by thermal expansion and contraction of traditional rubber seals.

[0039] like Figure 4 As shown, multiple first bearings 13 are fitted onto the outer surface of one end of the eccentric shaft 8. Each first bearing 13 is a deep groove ball bearing, and its outer ring is fixed to the inner wall of the eccentric sleeve 6. A bearing cap 7 is fixedly connected to the middle of the side of the plum blossom coupling 5 near the eccentric sleeve 6, with its end face abutting against the end face of the outer ring of the first bearing 13. A pressure plate 9 is fixedly connected to the end of the eccentric shaft 8, with its end face abutting against the end face of the inner ring of the first bearing 13. The use of the first bearings 13 as a support structure between the eccentric sleeve 6 and the eccentric shaft 8, combined with the axial limiting design of the bearing cap 7 and the pressure plate 9, improves the stability of the eccentric shaft 8's movement.

[0040] In this embodiment, two first bearings 13 are mounted side-by-side along the axial direction on the outer surface of the eccentric shaft 8. The outer rings of the first bearings 13 are fixed inside the eccentric bushing 6 by an interference fit. The side wall of the plum blossom coupling 5 is secured with a bearing cover 7 by screws, and the end face of the bearing cover 7 forms rigid contact with the end face of the outer ring of the first bearing 13. A threaded hole is machined at the eccentric end of the eccentric shaft 8, and a pressure plate 9 is fixed to the shaft end of the eccentric shaft 8 by screws, so that the end face of the pressure plate 9 fits against the end face of the inner ring of the first bearing 13.

[0041] like Figure 4 As shown, multiple second bearings 14 are fitted on the outer surface of the eccentric bushing 6. The second bearings 14 are deep groove ball bearings, and the outer rings of the second bearings 14 are fixed to the inner wall of the housing 1. A lower cover 4 is fixedly connected to the inner wall of the open end of the housing 1, and the inner end face of the lower cover 4 abuts against the end face of the outer ring of the second bearing 14; the inner end face of the plum blossom coupling 5 abuts against the end face of the inner ring of the second bearing 14.

[0042] In this embodiment, two sets of second bearings 14 are symmetrically arranged on the inner wall of the housing 1, and the outer rings of the second bearings 14 are fixed inside the housing 1 by an interference fit. The lower cover 4 is fixed to the opening end of the housing 1 by screws, and the inner end face of the lower cover 4 is rigidly pressed against the end face of the outer ring of the second bearing 14. The end face of the plum blossom coupling 5 is machined with an annular boss, and the end face of the annular boss is in direct contact with the end face of the inner ring of the second bearing 14.

[0043] like Figure 3 and Figure 4As shown, multiple counterweights 10 are evenly distributed around the outer edge of the upper cover 3, and the counterweights 10 are fixedly connected to the upper cover 3.

[0044] In this embodiment, six threaded mounting holes are evenly distributed along the circumferential direction on the outer edge of the upper cover 3, and a fan-shaped counterweight 10 is fixed to three of the holes with screws. The counterweight 10 is made of steel, and its arc-shaped contour is completely fitted to the outer edge of the upper cover 3.

[0045] like Figure 4 As shown, the outer surface of the lower cover 4 is provided with an annular sealing groove, and an O-ring 12 is embedded in the sealing groove. During installation, the lower cover 4 is fixed to the open end of the housing 1 by screws, and the O-ring 12 is fitted into the annular sealing groove, which improves the sealing performance between the lower cover 4 and the housing of the drive component.

[0046] like Figure 1 and Figure 2 As shown, the connection surfaces of the housing 1 and the drive component housing are provided with positioning holes, which can be used to install the housing 1 on the drive component housing.

[0047] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An eccentric grinding head, comprising a housing (1) and a plum blossom coupling (5), characterized in that: The housing (1) is fixedly connected to the outer shell of the drive component, and a top cover (3) is fixedly connected to one side of it. The plum blossom coupling (5) is fixed to the output end of the drive component, and an eccentric bushing (6) is fixedly connected to one side of it. The eccentric bushing (6) rotates inside the housing (1), and a graphite sealing ring (2) is fitted on its outer surface. The upper cover (3) abuts against the outside of the graphite sealing ring (2). An eccentric shaft (8) is rotatably mounted on the inner side of the eccentric bushing (6), and a grinding disc (11) is fixedly connected to the outer side of the eccentric shaft (8).

2. The eccentric grinding head as described in claim 1, characterized in that, The housing (1) has an annular accommodating groove (101) in the middle of the side near the top cover (3), and the graphite sealing ring (2) is installed in the accommodating groove (101).

3. The eccentric grinding head as described in claim 1, characterized in that, Multiple first bearings (13) are sleeved on the outer surface of one end of the eccentric shaft (8), and the outer ring of the first bearing (13) is fixed to the inner wall of the eccentric bushing (6).

4. The eccentric grinding head as described in claim 3, characterized in that, The plum blossom coupling (5) is fixedly connected to a bearing cover (7) in the middle of the side near the eccentric bushing (6), and the end face of the bearing cover (7) abuts against the end face of the outer ring of the first bearing (13).

5. The eccentric grinding head as described in claim 4, characterized in that, The end of the eccentric shaft (8) is fixedly connected to a pressure plate (9), and the end face of the pressure plate (9) abuts against the end face of the inner ring of the first bearing (13).

6. The eccentric grinding head as described in claim 1, characterized in that, The outer surface of the eccentric bushing (6) is fitted with a plurality of second bearings (14), and the outer ring of the second bearings (14) is fixed to the inner wall of the housing (1).

7. The eccentric grinding head as described in claim 6, characterized in that, The inner wall of the opening end of the housing (1) is fixedly connected to a lower cover (4), and the inner end face of the lower cover (4) abuts against the outer ring end face of the second bearing (14). The inner end face of the plum blossom coupling (5) abuts against the inner ring end face of the second bearing (14).

8. The eccentric grinding head as described in claim 1, characterized in that, The outer edge of the upper cover (3) is evenly distributed with multiple counterweights (10), and the counterweights (10) are fixedly connected to the upper cover (3).

9. The eccentric grinding head as described in claim 7, characterized in that, The outer surface of the lower cover (4) is provided with an annular sealing groove, and an O-ring (12) is embedded in the sealing groove.

10. The eccentric grinding head as described in claim 1, characterized in that, The connection surfaces of the housing (1) and the drive component housing are both provided with positioning holes.

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