A stable swing lever fixing structure for a sander

Abstract

The utility model discloses a kind of stable swing bar fixing structure for sander, it is related to sander technical field, including front shell, fixing part, fish eye bearing, swing bar, when fish eye bearing is needed to be assembled, fish eye bearing is placed into convex hole, the outer ring one side of fish eye bearing is contacted and is attached with the first step surface, then fixing part is fixed in the opening of convex hole, the other side of the outer ring of fish eye bearing is contacted and is attached with fixing part, to complete the limiting fixing of fish eye bearing, dismounting is convenient, when fish eye bearing is damaged, it is convenient to be separately disassembled, avoid the trouble that traditional still needs to first dismount guide sleeve, simultaneously make the position of fish eye bearing fixed in front shell, it will not cause movement due to swing of swing bar, guarantee that swing track of swing bar will not change, to guarantee polishing effect.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine technology, and in particular to a stable swing arm fixing structure for grinding machines. Background Technology

[0002] Pneumatic grinders come in various types and have advantages such as small size, high grinding efficiency, low noise and low vibration. They are not easy to fatigue even after long-term use. Pneumatic grinders are suitable for surface grinding of iron plates, wood, plastics, tires, fine polishing, deburring, rust removal, paint removal and other operations in the shipbuilding, automotive, abrasive and aerospace industries.

[0003] Existing grinding machines typically include a housing, a spherical bearing and guide sleeve installed inside the housing, and a swing arm (the spherical bearing is fitted onto the outer surface of the swing arm). When the swing arm is working, it swings around the contact point between the swing arm and the spherical bearing. The spherical bearing and guide sleeve are installed by being inserted sequentially from one end opening of the housing.

[0004] With this setup, on the one hand, when the spherical bearing is damaged, the guide sleeve needs to be removed before the spherical bearing can be taken out for repair or replacement, which is troublesome and time-consuming. On the other hand, since the spherical bearing is only embedded in the outer shell, there is no good limiting and fixing structure inside the outer shell to fix the spherical bearing. When the swing arm swings, it may cause the position of the spherical bearing to change, thereby changing the movement trajectory of the swing arm, which will result in poor grinding effect. Utility Model Content

[0005] To overcome the shortcomings of the existing technology, this utility model provides a stable swing arm fixing structure for a grinder, which solves the problems of the existing grinder where the process of removing the fisheye bearing for repair or replacement is troublesome and time-consuming, and there is no good limiting and fixing structure inside the shell to fix the fisheye bearing. When the swing arm swings, it may cause the position of the fisheye bearing to change, thereby changing the movement trajectory of the swing arm and resulting in poor grinding effect.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a stable rocker arm fixing structure for a grinding machine, comprising:

[0007] The front shell has a first through hole at one end and a convex hole at the other end, which communicates with the first through hole and has a first stepped surface.

[0008] The fastener is detachably and fixedly connected to the front shell;

[0009] A fisheye bearing, comprising an outer ring and an inner ring, wherein when the fixing member is fixed to the front housing, the two sides of the outer ring of the fisheye bearing contact the first stepped surface and the fixing member respectively;

[0010] The swing arm is detachably and fixedly connected to the inner ring of the fisheye bearing.

[0011] Preferably, the rocker arm includes a convex portion, the convex portion having a second stepped surface, a groove is formed on the outer surface of the convex portion, a retaining spring is provided in the groove, and when the fisheye bearing is fixed on the rocker arm, the two sides of the inner ring of the fisheye bearing are in contact and fit with the second stepped surface and the retaining spring, respectively.

[0012] Preferably, the fastener is an external nut, which is screwed and fixed to the opening of the convex hole at the other end of the front housing.

[0013] Preferably, the rocker arm further includes a shift fork, the shift fork includes two stops, the front shell has a first through hole at one end and a rear shell is detachably fixed thereto, the rear shell is provided with a cylinder, the cylinder includes a rotor, one end of the rotor is fixedly mounted with an eccentric block, the outer surface of the eccentric block is provided with a bearing, and both sides of the outer surface of the bearing are in contact with a stop.

[0014] Preferably, a guide sleeve is provided in the first through hole, and the guide sleeve has a through hole. The two symmetrical sides of the outer wall of the swing rod are in contact with the inner wall of the guide hole, and there is a gap between the other two symmetrical sides of the outer wall of the swing rod and the inner wall of the guide hole. Each stop block is aligned with one gap.

[0015] Preferably, an air intake rod is provided at one end of the rear shell.

[0016] Compared with the prior art, the beneficial effects that this utility model can achieve are:

[0017] When assembling a spherical bearing, place it into the convex hole, ensuring one side of the outer ring of the bearing contacts and fits against the first step surface. Then, fix the fastener at the opening of the convex hole, ensuring the other side of the outer ring of the bearing contacts and fits against the fastener. This completes the positioning and fixing of the spherical bearing, making disassembly and assembly convenient. When the spherical bearing is damaged, it can be easily disassembled and assembled separately, avoiding the trouble of first removing the guide sleeve as in traditional methods. At the same time, it fixes the position of the spherical bearing in the front housing, preventing movement due to the swing of the rocker arm and ensuring that the swing trajectory of the rocker arm does not change, thus guaranteeing the grinding effect. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the front shell, rear shell, and swing arm structure of this utility model;

[0019] Figure 2 This utility model Figure 1 Cross-sectional structural diagram;

[0020] Figure 3 This utility model Figure 2 Schematic diagram of the structure at point A in the middle;

[0021] Figure 4 This is a schematic diagram of the swing arm structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the cross-sectional structure of the guide sleeve and the rocker arm of this utility model;

[0023] The components are as follows: 1. Front housing; 101. First through hole; 102. Convex hole; 2. Fisheye bearing; 3. Fixing component; 4. Guide sleeve; 41. Guide through hole; 5. Rocker arm; 51. Convex part; 52. Shift fork part; 521. Stop block; 501. Snap groove; 6. Snap ring; 7. Rear housing; 8. Cylinder; 81. Rotor; 9. Eccentric block; 10. Intake rod. Detailed Implementation

[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model is further described below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments in the implementation methods without creative effort are all within the protection scope of this utility model.

[0025] like Figure 2 and Figure 3 As shown, this utility model provides a stable rocker arm fixing structure for a grinder, including a front shell 1, a fixing member 3 and a fisheye bearing 2;

[0026] The front shell 1 has a first through hole 101 at one end and a convex hole 102 at the other end. The convex hole 102 communicates with the first through hole 101 and has a first stepped surface.

[0027] The fastener 3 is detachably and fixedly connected to the front shell 1;

[0028] The fisheye bearing 2 includes an outer ring and an inner ring. When the fixing member 3 is fixed to the front housing 1, the two sides of the outer ring of the fisheye bearing 2 are in contact with the first step surface and the fixing member 3, respectively.

[0029] The rocker arm 5 is detachably and fixedly connected to the inner ring of the fisheye bearing 2;

[0030] When it is necessary to assemble the fisheye bearing 2, place the fisheye bearing 2 into the convex hole 102, so that one side of the outer ring of the fisheye bearing 2 contacts and fits against the first step surface. Then fix the fixing part 3 at the opening of the convex hole 102, so that the other side of the outer ring of the fisheye bearing 2 contacts and fits against the fixing part 3, thereby completing the limiting and fixing of the fisheye bearing 2. It is convenient to disassemble and assemble. When the fisheye bearing 2 is damaged, it is convenient to disassemble and assemble it separately, avoiding the trouble of first removing the guide sleeve 4 in the traditional way. At the same time, it fixes the position of the fisheye bearing 2 in the front shell 1, so that it will not move due to the swing of the swing rod 5, ensuring that the swing trajectory of the swing rod 5 will not change, thereby ensuring the grinding effect.

[0031] like Figure 3 and Figure 4 As shown, the rocker arm 5 includes a convex part 51, the convex part 51 has a second stepped surface, the outer surface of the convex part 51 is provided with a slot 501, and a retaining spring 6 is provided in the slot 501. When the fisheye bearing 2 is fixed on the rocker arm 5, the two sides of the inner ring of the fisheye bearing 2 are in contact and fit with the second stepped surface and the retaining spring 6 respectively.

[0032] When assembling and fixing the fisheye bearing 2 and the rocker arm 5, after the fisheye bearing 2 is installed and fixed, the rocker arm 5 is inserted through the first through hole 101, so that the convex part 51 passes through the guide sleeve 4 and the fisheye bearing 2. At this time, one end of the convex part 51 protrudes through the convex hole 102 until the second step surface of the convex part 51 contacts and fits against one side of the inner ring of the fisheye bearing 2. Then, the retaining spring 6 is used to fit through the end of the convex part 51 that protrudes through the convex hole 102, so that it is locked in the retaining groove 501. At this time, the retaining spring 6 contacts and fits against the other side of the inner ring of the fisheye bearing 2, thereby ensuring that there is no relative slippage between the rocker arm 5 and the fisheye bearing 2, and further ensuring the stability of the swing trajectory of the rocker arm 5.

[0033] like Figure 3 As shown, the fastener 3 is an external nut, which is screwed to the opening of the convex hole 102 at the other end of the front housing 1 (the opening of the corresponding convex hole 102 is provided with an internal thread that matches the external nut). With this setting, it is convenient to quickly assemble and disassemble the fastener 3, and thus quickly assemble and disassemble the fisheye bearing 2.

[0034] like Figures 1-5As shown, the rocker arm 5 also includes a shift fork 52, which includes two stops 521. The front shell 1 has a first through hole 101 at one end, and a rear shell 7 is detachably fixed thereto. The rear shell 7 is provided with a cylinder 8, which includes a rotor 81. An eccentric block 9 is fixedly installed at one end of the rotor 81. A bearing is provided on the outer surface of the eccentric block 9. Both sides of the outer surface of the bearing are in contact with a stop 521. An air intake rod 10 is provided at one end of the rear shell 7. A guide sleeve 4 is provided in the first through hole 101. The guide sleeve 4 has a guide through hole 41 through it. The two symmetrical sides of the outer wall of the rocker arm 5 are in contact with the inner wall of the guide through hole 41. There is a gap between the other two symmetrical sides of the outer wall of the rocker arm 5 and the inner wall of the guide through hole 41. Each stop 521 is directly opposite a gap.

[0035] When it is necessary to drive the swing arm 5 to swing, air is introduced through the air intake rod 10, which drives the rotor 81 to rotate. The rotor 81 drives the eccentric block 9 to rotate eccentrically, and the eccentric block 9 drives the bearing to rotate eccentrically. Since the two symmetrical sides of the outer wall of the swing arm 5 are in contact with the inner wall of the guide hole 41, and there is a gap between the other two symmetrical sides of the outer wall of the swing arm 5 and the inner wall of the guide hole 41, and each stop block 521 is directly opposite a gap, the bearing only drives the shift fork part 52 to swing back and forth along the direction perpendicular to the stop block 521 during the eccentric swing. That is, the swing arm 5 swings with its connection with the fisheye bearing 2 as the fulcrum. Specifically, a file is set at one end of the swing arm 5 (the specific file installation is existing technology and will not be described in detail here), which can realize the grinding work.

[0036] 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. A stabilizing rocker arm fixing structure for a grinding machine, characterized in that, include: The front shell (1) has a first through hole (101) at one end and a convex hole (102) at the other end. The convex hole (102) communicates with the first through hole (101) and has a first stepped surface. The fastener (3) is detachably and fixedly connected to the front shell (1); The fisheye bearing (2) includes an outer ring and an inner ring. When the fixing member (3) is fixed to the front shell (1), the two sides of the outer ring of the fisheye bearing (2) are in contact with the first step surface and the fixing member (3) respectively. The swing arm (5) is detachably and fixedly connected to the inner ring of the fisheye bearing (2).

2. The stable rocker arm fixing structure for a grinder according to claim 1, characterized in that: The swing arm (5) includes a convex part (51), the convex part (51) has a second stepped surface, the outer surface of the convex part (51) is provided with a slot (501), the slot (501) is provided with a retaining spring (6), when the fisheye bearing (2) is fixed on the swing arm (5), the inner ring of the fisheye bearing (2) is in contact with the second stepped surface and the retaining spring (6) on both sides respectively.

3. The stable rocker arm fixing structure for a grinder according to claim 1, characterized in that: The fastener (3) is an outer nut, which is screwed and fixed to the opening of the convex hole (102) at the other end of the front shell (1).

4. The stable rocker arm fixing structure for a grinder according to claim 2, characterized in that: The swing arm (5) also includes a shift fork (52), the shift fork (52) includes two stops (521), the front shell (1) has a first through hole (101) and a rear shell (7) is detachably fixed at one end, the rear shell (7) is provided with a cylinder (8), the cylinder (8) includes a rotor (81), an eccentric block (9) is fixedly installed at one end of the rotor (81), the outer surface of the eccentric block (9) is provided with a bearing, and both sides of the outer surface of the bearing are in contact with a stop (521).

5. The stable rocker arm fixing structure for a grinder according to claim 4, characterized in that: The first through hole (101) is provided with a guide sleeve (4), and the guide sleeve (4) is provided with a guide through hole (41). The two symmetrical sides of the outer wall of the swing rod (5) are in contact with the inner wall of the guide through hole (41), and there is a gap between the other two symmetrical sides of the outer wall of the swing rod (5) and the inner wall of the guide through hole (41). Each stop block (521) is directly opposite a gap.

6. The stable rocker arm fixing structure for a grinder according to claim 5, characterized in that: An air intake rod (10) is provided at one end of the rear shell (7).

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