Crankshaft bearing dismounting tool

Abstract

A crankshaft bearing disassembling tool comprises a fixing base, a threaded hole is machined in the middle of the fixing base, a positioning bolt is installed in the middle of the fixing base, a pressing block is arranged on the upper portion of the positioning bolt in a sleeved mode, and the left side and the right side of the lower portion of the pressing block are symmetrically machined to form inclined faces. Clamping blocks are installed on the lower portion of the swing rod, arc grooves are machined in the opposite sides of the two clamping blocks, guide rods are installed on the fixing base in a bilateral symmetry mode, supports are correspondingly arranged on the upper portion of the pressing block, and the supports are in sliding fit with the guide rods. In the screwing process of the positioning bolt and the fixing base, the end of the positioning bolt abuts against the end of the crankshaft, the pressing block on the positioning bolt synchronously pushes the swing rod to rotate, the bearing to be disassembled is clamped and positioned through the clamping block at the lower end of the swing rod, the crankshaft is ejected out of an inner ring of the bearing through the positioning bolt, the structure is simple, positioning is convenient, and the disassembling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a crankshaft bearing disassembly tool. Background Art

[0002] The crankshaft is one of the most important components of a diesel engine. The function of the crankshaft is to convert the force transmitted by the connecting rod into a rotating force and transmit it, and at the same time drive auxiliary mechanisms such as the valve train, fan and water pump through the crankshaft gear or pulley to realize the working cycle. When the diesel engine is working, the crankshaft is subjected to complex forces and is prone to damage such as wear, deformation, cracks or fractures. Therefore, it is necessary to often open the position where the crankshaft is located for inspection. When necessary, the crankshaft also needs to be taken out for maintenance and inspection. When the crankshaft is overhauled, the bearing needs to be removed. The existing bearing disassembly tools have complex structures, inconvenient positioning, and are laborious and inefficient to disassemble. Content of the Utility Model

[0003] In view of the deficiencies in the above problems, the utility model provides a crankshaft bearing disassembly tool.

[0004] To achieve the above object, the utility model provides a crankshaft bearing disassembly tool, including a fixed seat. A threaded hole is machined in the middle of the fixed seat and a positioning bolt is installed. A pressing block is sleeved on the upper part of the positioning bolt. The lower part of the pressing block is symmetrically machined with inclined surfaces on the left and right sides. Swing rods are symmetrically arranged on the left and right sides of the positioning bolt. The middle part of the swing rod is rotatably connected to the fixed seat. A guiding block is fixedly arranged on the upper part of the swing rod. The guiding block abuts against the inclined surface. A clamping block is installed at the lower part of the swing rod. An arc-shaped groove is machined on one side of the two clamping blocks facing each other. Guide rods are symmetrically installed on the left and right of the fixed seat. A bracket is correspondingly arranged on the upper part of the pressing block. The bracket forms a sliding fit with the guide rod.

[0005] As a further improvement of the utility model, the cylinder body has a stepped shaft structure. Through slots are symmetrically machined on both sides of the threaded hole on the fixed seat. The middle part of the swing rod passes through the through slot and is rotatably connected to both sides of the through slot through a rotating shaft. A torsion spring is arranged on the rotating shaft.

[0006] As a further improvement of the utility model, a compression spring is arranged on the upper part of the guide rod. The lower part of the compression spring abuts against the shaft shoulder of the guide rod, and the upper part of the compression spring abuts against the lower part of the bracket.

[0007] As a further improvement of the utility model, an arc-shaped guiding surface is machined on the upper part of the guiding block.

[0008] As a further improvement of the utility model, a semi-circular bottom support plate extends radially from the bottom of the arc-shaped groove.

[0009] As a further improvement of the utility model, the inner diameter of the arc-shaped groove matches the outer diameter of the bearing to be disassembled.

[0010] As a further improvement of the present utility model, the inner wall surface of the arc groove has roughness.

[0011] The beneficial effects of the present utility model are as follows:

[0012] During the screwing process of the positioning bolt and the fixed seat in this structure, the end of the positioning bolt abuts against the end of the crankshaft. The pressing block on the positioning bolt synchronously pushes the swing rod to rotate. The clamping block at the lower end of the swing rod clamps and positions the bearing to be disassembled. The crankshaft is pushed out of the inner ring of the bearing by the positioning bolt. The structure is simple, the positioning is convenient, and the disassembly efficiency is improved. Description of the Drawings

[0013] Figure 1 is the front view of a crankshaft bearing disassembly tool of the present utility model;

[0014] Figure 2 is the top view of the clamping block 3;

[0015] Figure 3 is the top view of the fixed seat 1;

[0016] Figure 4 is the working schematic diagram of a crankshaft bearing disassembly tool of the present utility model.

[0017] In the figure: 1. Fixed seat; 11. Through groove; 12. Threaded hole; 2. Swing rod; 21. Guide block; 22. Arc guide surface; 3. Clamping block; 31. Arc groove; 32. Semi-circular bottom support plate; 4. Rotating shaft; 5. Torsion spring; 6. Positioning bolt; 7. Pressing block; 71. Inclined surface; 72. Through hole; 8. Guide rod; 9. Compression spring; 10. Bracket. Detailed Embodiments

[0018] As Figure 1 shown, a crankshaft bearing disassembly tool according to an embodiment of the present utility model includes a fixed seat 1. A threaded hole 12 is machined in the middle of the fixed seat 1 and a positioning bolt 6 is installed. A pressing block 7 is sleeved on the upper part of the positioning bolt 6. Inclined surfaces 71 are symmetrically machined on the left and right sides of the lower part of the pressing block 7. Swing rods 2 are symmetrically arranged on the left and right sides of the positioning bolt 6. The middle of the swing rod 2 is rotatably connected to the fixed seat 1. Through grooves 11 are symmetrically machined on the upper and lower sides of the threaded hole 12 on the fixed seat 1. The middle of the swing rod 2 passes through the through groove 11 and is rotatably connected to both sides of the through groove 11 through a rotating shaft 4 (see Figure 3 ), a torsion spring 5 is arranged on the rotating shaft 4. A guide block 21 is fixedly arranged on the upper part of the swing rod 2. The guide block 21 abuts against the inclined surface 71. An arc guide surface 22 is machined on the upper part of the guide block 21. A clamping block 3 is installed at the lower part of the swing rod 2. Arc grooves 31 are machined on the opposite sides of the two clamping blocks 3. The inner diameter of the arc groove 31 matches the outer diameter of the bearing to be disassembled. The inner wall surface of the arc groove 31 has roughness. A semi-circular bottom support plate 32 extends radially from the bottom of the arc groove 31 (see Figure 2), guide rods 8 are symmetrically installed on the left and right of the fixed seat 1. A bracket 10 is correspondingly provided on the upper part of the pressing block 7. The bracket 10 forms a sliding fit with the guide rod 8. A compression spring 9 is provided on the upper part of the guide rod 8. The lower part of the compression spring 9 abuts against the shaft shoulder of the guide rod 8, and the upper part of the compression spring 9 abuts against the lower part of the bracket 10.

[0019] In this structure, during the screwing process of the positioning bolt and the fixed seat, the end of the positioning bolt abuts tightly against the end of the crankshaft. The pressing block on the positioning bolt synchronously pushes the swing rod to rotate. The clamping block at the lower end of the swing rod is used to clamp and position the bearing to be disassembled. The crankshaft is pushed out of the inner ring of the bearing by the positioning bolt. The structure is simple, the positioning is convenient, and the disassembly efficiency is improved.

[0020] During specific use, for the convenience of understanding the present invention, the following description is made in conjunction with the accompanying drawings;

[0021] During use, the end of the crankshaft is placed corresponding to the end of the positioning bolt. The bearing to be disassembled is placed between the two clamping blocks. As the positioning bolt rotates, the positioning bolt gradually moves downward and contacts the end of the crankshaft. The pressing block on the upper part of the positioning bolt moves downward synchronously. The inclined surfaces on both sides of the pressing block form an inclined outward thrust on the guiding block on the upper part of the swing rod. After the guiding block is stressed, the whole swing rod rotates around the rotating shaft. The clamping block at the lower part of the swing rod approaches the bearing side until the inner wall surface of the arc-shaped groove of the clamping block contacts the surface of the bearing and clamps and positions the bearing. As the positioning bolt continues to move downward, the positioning bolt pushes the crankshaft out of the inner ring of the bearing. A semi-circular bottom support plate is provided at the bottom of the arc-shaped groove to prevent the bearing from disengaging from the clamping block; after the disassembly is completed, the positioning bolt is rotated reversely, the swing rod is reset by the memory characteristic of the torsion spring, and the pressing block is reset by the memory characteristic of the compression spring.

[0022] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A crankshaft bearing disassembly tool, characterized in that: It includes a fixed seat (1). A threaded hole (12) is machined in the middle of the fixed seat (1) and a positioning bolt (6) is installed. A pressing block (7) is sleeved on the upper part of the positioning bolt (6). Bevels (71) are symmetrically machined on the left and right sides of the lower part of the pressing block (7). Swing rods (2) are symmetrically arranged on the left and right sides of the positioning bolt (6). The middle part of the swing rod (2) is rotatably connected to the fixed seat (1). A guide block (21) is fixedly arranged on the upper part of the swing rod (2). The guide block (21) abuts against the bevel (71). A clamping block (3) is installed at the lower part of the swing rod (2). Arc-shaped grooves (31) are machined on the opposite sides of the two clamping blocks (3). Guide rods (8) are symmetrically installed on the left and right of the fixed seat (1). A bracket (10) is correspondingly arranged on the upper part of the pressing block (7). The bracket (10) forms a sliding fit with the guide rod (8).

2. The crankshaft bearing disassembly tool according to claim 1, wherein: Through slots (11) are symmetrically machined on both sides of the threaded hole (12) on the fixed seat (1). The middle part of the swing rod (2) passes through the through slot (11) and is rotatably connected to both sides of the through slot (11) through a rotating shaft (4). A torsion spring (5) is arranged on the rotating shaft (4).

3. A crankshaft bearing disassembly tool according to claim 1, characterized in that: A compression spring (9) is arranged on the upper part of the guide rod (8). The lower part of the compression spring (9) abuts against the shaft shoulder of the guide rod (8). The upper part of the compression spring (9) abuts against the lower part of the bracket (10).

4. A crankshaft bearing disassembly tool according to claim 1, characterized in that: An arc-shaped guide surface (22) is machined on the upper part of the guide block (21).

5. A crankshaft bearing disassembly tool according to claim 1, characterized in that: A semi-circular bottom support plate (32) extends radially from the bottom of the arc-shaped groove (31).

6. The crankshaft bearing disassembly tool according to claim 1, characterized in that: The inner diameter of the arc-shaped groove (31) matches the outer diameter of the bearing to be disassembled.

7. The crankshaft bearing removal tool according to claim 1, characterized in that: The inner wall surface of the arc-shaped groove (31) has roughness.

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