A diesel engine valve spring removal and installation tool

Abstract

This utility model aims to provide a diesel engine valve spring removal and installation tool, including a base plate, a column, a horizontal slide bar, a connecting piece, a threaded rod, and a spring pressure head. The tool is characterized in that: the column is vertically mounted on a base; the horizontal slide bar is horizontally positioned, with its right end rotatably mounted on the top of the column; the connecting piece is slidably connected to the horizontal slide bar via a sliding through hole; the connecting piece has a second threaded through hole axially parallel to the column, and the threaded rod is threadedly fitted onto the connecting piece in the second threaded through hole; the lower end of the threaded rod extends from the lower end of the second threaded through hole, and a spring pressure head is fixedly mounted on it. This device, by moving the threaded rod downwards, causes the spring pressure head to move downwards and press against the valve spring, thereby allowing for relatively easy removal of the valve spring lock plate, preventing the spring from rebounding and pinching the user's fingers, and ensuring the safety of the operator.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment, and in particular to a tool for removing and installing diesel engine valve springs. Background Technology

[0002] The cylinder head valve assembly of a diesel engine consists of several parts, including valves, valve springs, and valve lock plates. When engine valves are damaged or the engine requires major overhaul, they need to be replaced. Since the valves are located at the innermost part of the cylinder, the valve springs must be removed before the valves can be replaced. Specific tools are required for valve spring removal and installation. Most existing valve spring removal and installation tools require continuous force to remove the valve springs, necessitating the use of two people for safety. When using these tools, one end is fixed to the threaded hole in the cylinder head, the spring pressure head is aligned with the valve spring to be removed, and the user uses the other end to continuously press down, using leverage to compress the valve spring, thereby removing the valve lock plate and further removing the valve spring for valve replacement.

[0003] However, since the valve spring must be compressed before the valve lock plate can be removed or installed, there is a risk that the spring may spring back and pinch the user's fingers, posing a certain safety hazard. Utility Model Content

[0004] In view of the technical problems existing in the background art, the present invention aims to provide a diesel engine valve spring removal and installation tool. This device overcomes the defects of the prior art and has the characteristics of simple structure, convenient and labor-saving use, and can avoid pinching the user's fingers.

[0005] To solve the above problems, the technical solution of this utility model is as follows: A diesel engine valve spring disassembly and assembly tool, comprising a base plate, a column, a transverse slide rod, a connecting piece, a threaded rod, and a spring pressure head, characterized in that: the column is vertically installed on the base, the transverse slide rod is horizontally arranged, and its right end is rotatably installed on the top of the column; the connecting piece is slidably connected to the transverse slide rod through a sliding through hole; the connecting piece is provided with a second threaded through hole axially parallel to the column, and the threaded rod is threadedly fitted onto the connecting piece with the second threaded through hole; the lower end of the threaded rod extends from the lower end of the second threaded through hole, and a spring pressure head is fixedly mounted on it.

[0006] The transverse slide bar is a rod with a square cross-section, and the sliding through hole is a square hole that matches the transverse slide bar.

[0007] The upper side wall of the sliding through hole on the connector is provided with a first threaded through hole. The relative position of the connector and the transverse slide rod is fixed by screwing in a fastening bolt.

[0008] The upper end of the threaded rod is located above the second threaded through hole, and a handle is provided on it.

[0009] The top of the column is provided with a pivot, and the right end of the transverse slide rod is provided with a ring corresponding to the pivot. The ring and the pivot are fitted with a clearance to install the transverse slide rod on the top of the column.

[0010] The top surface of the ring is flush with or slightly higher than the top surface of the shaft.

[0011] It also includes a limiting plate. The top of the rotating shaft is provided with a threaded hole A, and the middle of the limiting plate is provided with a threaded hole B corresponding to the threaded hole A. The limiting plate is installed on the top of the rotating shaft by bolts, and the ring is limited by bolts by tightening or loosening.

[0012] The base has symmetrical U-shaped grooves at both ends. The base fixing bolts are screwed in through the U-shaped grooves and the mounting screw holes on the cylinder head, so that the base is fixedly installed on the cylinder head.

[0013] The spring pressure head includes a top plate, support rods, and a pressure ring. Two or more sets of support rods are evenly spaced around the top plate. The lower ends of each support rod extend downward and outward at an angle, connecting to the top of the pressure ring. The lower end face of the threaded rod is provided with an assembly screw, the diameter of which is smaller than the diameter of the threaded rod. The top plate of the spring pressure head is provided with a corresponding assembly screw hole. The spring pressure head is fixedly installed on the lower end of the threaded rod by screwing in an assembly bolt through threaded engagement.

[0014] The beneficial effects of this utility model are as follows:

[0015] This utility model relates to a diesel engine valve spring removal and installation tool. Before use, the base is installed at the threaded hole position of the camshaft cover in the middle of the cylinder head. After installing the tool, the horizontal slide bar is rotated to align the sliding connector with the valve springs in different positions. By rotating the handle, the threaded rod is moved downward, causing the spring pressure head to move downward and press the valve spring. This allows for easy removal of the valve lock plate and disassembly of the valve assembly. This allows users to quickly disassemble the spring, eliminating the need for personnel to continuously press the valve spring, thus ensuring the safety of the workers. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the structure of the connector of this utility model.

[0018] Figure 3 This is a schematic diagram of the structure of the base of this utility model.

[0019] The names and numbers of the parts in the diagram are as follows:

[0020] 1 is the base, 2 is the limiting plate, 3 is the bolt, 4 is the transverse sliding rod, 5 is the connector, 6 is the handle, 7 is the threaded rod, 8 is the spring pressure head, 9 is the nut, 10 is the ring, 11 is the U-shaped groove, 12 is the rotating shaft, 13 is the threaded hole A, 14 is the base, 15 is the top plate, 16 is the support rod, 17 is the pressure ring, 51 is the square hole, 52 is the first threaded through hole, and 53 is the second threaded through hole. Detailed Implementation

[0021] The following description, in conjunction with the accompanying drawings, details the implementation methods and embodiments of this utility model and their working processes.

[0022] Referring to the accompanying drawings, a diesel engine valve spring removal and installation tool according to this embodiment includes a base plate 14, a column 1, a transverse slide bar 4, a connecting piece 5, a threaded rod 7, and a spring pressure head 8. The tool is characterized in that: the column 1 is vertically mounted on the base 14; the transverse slide bar 4 is horizontally positioned, with its right end rotatably mounted on the top of the column 1; the connecting piece 5 is slidably connected to the transverse slide bar 4 through a sliding through hole 51; the connecting piece 5 has a second threaded through hole 53 axially parallel to the column 1, and the threaded rod 7 is threadedly fitted onto the connecting piece 5 with the second threaded through hole 53; the lower end of the threaded rod 7 extends from the lower end of the second threaded through hole 53, and a spring pressure head 8 is fixedly mounted on it.

[0023] The transverse slide bar 4 is a rod with a square cross-section, and the sliding through hole 51 is a square hole that matches the transverse slide bar 4.

[0024] The upper side wall of the sliding through hole 51 on the connector 5 has a first threaded through hole 52. By screwing in a fastening bolt, the relative position of the connector 5 and the transverse slide rod 4 is fixed. After the position is adjusted, the connector 5 is fixed by locking the first threaded through hole 52 with a bolt to prevent it from sliding on the transverse slide rod 4 when the spring is compressed, thereby reducing the possibility of the spring flying out due to uneven force.

[0025] The upper end of the threaded rod 7 is located above the second threaded through hole 53, and a handle 6 is provided on it. By rotating the handle 6, the distance between the spring pressure head and the valve spring on the cylinder head is changed. By pressing the valve spring, the valve lock plate can be removed, thereby disassembling the valve assembly to replace damaged parts.

[0026] The top of the column 1 is provided with a rotating shaft 12, and the right end of the transverse slide rod 4 is provided with a ring 10 corresponding to the rotating shaft 12. The ring 10 and the rotating shaft 12 are fitted with a clearance to install the transverse slide rod 4 on the top of the column 1.

[0027] The top surface of the ring 10 is flush with or slightly higher than the top surface of the shaft 12.

[0028] It also includes a limiting plate 2. The top of the rotating shaft 12 has a threaded hole A13, and the middle of the limiting plate 2 has a threaded hole B corresponding to the threaded hole A13. The limiting plate 2 is simultaneously fitted into the threaded hole A13 and the threaded hole B by bolts 3, thereby installing the limiting plate 2 on the top of the rotating shaft 12. The limiting of the ring 10 is locked or released by the bolts 3. The locking limiting plate 2 can effectively install the transverse slide bar 4 on the column 1 by limiting the ring 10, so that it will not shift its position or detach from the column 1 during the sliding process. The locking limiting plate 2 can also fix the position of the transverse slide bar 4, preventing the transverse slide bar 4 from sliding back and forth continuously during normal use.

[0029] The base 14 has symmetrical U-shaped grooves 11 at both ends. By engaging the U-shaped grooves 11 with the mounting screw holes on the cylinder head, the base fixing bolts are screwed in, thereby fixing the base 14 onto the cylinder head. The U-shaped groove 11 structure is designed to accommodate screw holes with different spacing.

[0030] The spring pressure head 8 includes a top plate 15, support rods 16, and a pressure ring 17. Two or more sets of support rods 16 are evenly spaced around the top plate 15. The lower ends of each support rod 16 extend downward and outward at an angle and connect to the top of the pressure ring 17. The lower end face of the threaded rod 7 is provided with an assembly screw. The diameter of the assembly screw is smaller than the diameter of the threaded rod 7. The top plate 15 of the spring pressure head 8 is provided with an assembly screw hole in the middle. The spring pressure head 8 is fixedly installed on the lower end of the threaded rod 7 by screwing in the assembly bolt 9 through threaded engagement.

[0031] The working process of this embodiment is as follows:

[0032] Install the base 1 in the middle of the cylinder head, rotate the transverse slide bar 4 and the movable connecting piece 5 so that the spring pressure head 8 is aligned with the valve assembly, tighten the bolt 3 to lock the limiting plate 2 and fix the position of the transverse slide bar 4 to prevent it from sliding, and lock the connecting piece 5 through the first threaded through hole 52 to prevent it from moving on the transverse slide bar 4. Move the handle 6 to move the threaded rod 7 down, which will move the spring pressure head 8 down and press the valve spring. After removing the valve lock plate, rotate the handle 6 in the opposite direction to slowly release the valve spring, loosen the bolt 3, rotate the ring 10 to remove the transverse slide bar, and remove the parts included in the diesel engine valve assembly for replacement.

Claims

1. A tool for removing and installing a spring of a diesel engine valve, comprising a base (14), a vertical column (1), a horizontal slide rod (4), a connecting piece (5), a threaded rod (7), a spring pressing head (8), characterized in that: The column (1) is vertically installed on the base (14), and the horizontal slide bar (4) is horizontally set, with its right end rotatably installed on the top of the column (1); the connector (5) is slidably connected to the horizontal slide bar (4) through the sliding through hole (51); the connector (5) is provided with a second threaded through hole (53) axially parallel to the column (1), and the threaded rod (7) is threadedly fitted to the second threaded through hole (53) and installed on the connector (5); the lower end of the threaded rod (7) extends from the lower end of the second threaded through hole (53), and a spring pressure head (8) is fixedly provided on it.

2. The diesel engine valve spring removal and installation tool according to claim 1, characterized in that: The transverse slide bar (4) is a rod with a square cross-section, and the sliding through hole (51) is a square hole that matches the transverse slide bar (4).

3. The diesel engine valve spring removal and installation tool according to claim 1, characterized in that: The upper side wall of the sliding through hole (51) on the connector (5) is provided with a first threaded through hole (52). By screwing in the fastening bolt, the relative position of the connector (5) and the transverse slide rod (4) is fixed.

4. The diesel engine valve spring removal and installation tool according to claim 1, characterized in that: The upper end of the threaded rod (7) is located above the second threaded through hole (53), and a handle (6) is provided on it.

5. The diesel engine valve spring removal and installation tool according to claim 1, characterized in that: The top of the column (1) is provided with a pivot (12), and the right end of the transverse slide rod (4) is provided with a ring (10) corresponding to the pivot (12). The ring (10) and the pivot (12) are fitted together to install the transverse slide rod (4) on the top of the column (1).

6. The diesel engine valve spring removal and installation tool according to claim 5, characterized in that: The top surface of the ring (10) is flush with or slightly higher than the top surface of the shaft (12).

7. The diesel engine valve spring removal and installation tool according to claim 6, characterized in that: It also includes a limiting plate (2), the top of the rotating shaft (12) is provided with a threaded hole A (13), and the middle of the limiting plate (2) is provided with a threaded hole B corresponding to the threaded hole A (13). The limiting plate (2) is simultaneously fitted into the threaded hole A (13) and the threaded hole B by bolts (3), thereby installing the limiting plate (2) on the top of the rotating shaft (12) and locking or loosening the ring (10) by bolts (3).

8. The diesel engine valve spring removal and installation tool according to claim 1, characterized in that: The base (14) has symmetrical U-shaped grooves (11) at both ends. The base fixing bolts are screwed in through the U-shaped grooves (11) and the mounting screw holes on the cylinder head, so that the base (14) is fixedly installed on the cylinder head.

9. The diesel engine valve spring removal and installation tool according to claim 1, characterized in that: The spring pressure head (8) includes a top plate (15), support rods (16), and pressure ring (17). Two or more sets of support rods (16) are evenly spaced around the top plate (15). The lower ends of each support rod (16) extend downward and outward at an angle and connect to the top of the pressure ring (17). The lower end face of the threaded rod (7) is provided with an assembly screw. The diameter of the assembly screw is smaller than the diameter of the threaded rod (7). The top plate (15) of the spring pressure head (8) is provided with an assembly screw hole in the middle. The spring pressure head (8) is fixedly installed on the lower end of the threaded rod (7) by screwing in the assembly bolt (9) through threaded engagement.

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