A railway diesel locomotive valve spring dismounting tool

Abstract

The utility model discloses a railway diesel locomotive valve spring dismounting tool, including support subassembly, support subassembly includes two groups of cross bars and vertical support rod, and the end of two groups of cross bars is equipped with handle, and the other end is equipped with connecting seat, and vertical support rod is fixedly perpendicular in the bottom of connecting seat, and its bottom end is equipped with the set screw, and lifting drive subassembly is slidably connected on two groups of cross bars, and the bottom is equipped with compression roof, and adjusting mechanism installs at the bottom of compression roof, and the bottom is connected with two groups of pressure head, the utility model discloses a vertical support rod can be fixed in the cylinder cover through the set screw, and the cross bar position can be adjusted with the help of handle, and the compression roof and pressure head can be moved to the valve spring above through lifting drive subassembly, and after the accurate adaptation spring specification through adjusting mechanism, the spring is compressed through the pressure of lifting drive subassembly, and can complete dismounting after the lock piece exposes, and finally realizes the valve spring convenient, safe, efficient dismounting, and reduces the labor intensity and component damage risk.

Description

Technical Field

[0001] This utility model relates to the technical field of railway locomotive maintenance tools, specifically a tool for disassembling and assembling valve springs of diesel engines in railway diesel locomotives. Background Technology

[0002] Valve springs are core components of the valve train of diesel engines in railway locomotives. As elastic actuators that ensure precise valve opening and closing, their mechanical properties, structural stability, and fatigue life directly determine the intake efficiency and exhaust flow of the diesel engine, which in turn significantly affect combustion completeness, power output stability, and overall engine reliability. They are an important guarantee for maintaining locomotive traction performance and safe operation.

[0003] During locomotive maintenance, valve springs need to be disassembled periodically for inspection and replacement. However, existing disassembly and assembly tools have the following drawbacks: poor compatibility: traditional tools are mostly of a single specification and cannot be compatible with diesel engine valve springs of different diameters, requiring multiple sets of tools, which increases carrying and management costs; inconvenient operation: relying on manual force to compress the spring is labor-intensive, and uneven force can easily lead to spring misalignment, jamming, or even damage to valve stems, spring seats, and other related components; insufficient safety: compressed valve springs have a large energy storage capacity and lack a reliable positioning mechanism, making them prone to rebound and falling off, posing a safety hazard to operators. Therefore, it is necessary to design a tool for disassembling and assembling diesel engine valve springs in railway diesel locomotives to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to provide a tool for disassembling and assembling valve springs of diesel engines in railway locomotives, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tool for disassembling and assembling valve springs of a railway diesel locomotive, comprising a support assembly, a lifting drive assembly, an adjustment mechanism, and pressure heads. The support assembly includes two sets of horizontal bars and a vertical support rod. The two sets of horizontal bars are arranged in parallel, with handles at their ends and a connecting seat at the end away from the handles. The vertical support rod is vertically fixed to the bottom of the connecting seat, and its bottom end is provided with a positioning bolt adapted to a pre-set positioning hole in the cylinder head. The lifting drive assembly is slidably connected to the two sets of horizontal bars. The bottom of the lifting drive assembly is provided with a compression top plate. The adjustment mechanism is installed at the bottom of the compression top plate, and two sets of pressure heads are connected to the bottom of the compression top plate.

[0006] Preferably, the lifting drive assembly includes a slide block, a screw is threadedly connected to the center of the slide block, one end of which is provided with a crank handle, and the other end is rotatably connected to the top surface of the compression top plate. The top of the compression top plate is provided with limit rods near both ends, and both sets of limit rods are slidably connected to the slide block.

[0007] Preferably, one set of the limiting rods has scale lines on its surface.

[0008] Preferably, a locking bolt is threaded onto one side of the slide block to fix its position.

[0009] Preferably, the adjustment mechanism includes an adjustment knob, and a T-shaped groove is provided at the bottom of the compression top plate. Two sets of sliders are slidably connected to the inner side of the groove. The bottom of each set of sliders is connected to the corresponding pressure head through a connecting plate. A bidirectional screw is rotatably connected to the inner side of the T-shaped groove and threadedly connected to the two sets of sliders. One end of the screw extends to the outside of the compression top plate and is connected to the adjustment knob.

[0010] Preferably, the bottom of the pressure head is provided with an arc-shaped pressure groove that matches the upper end face of the valve spring, and the inner side of the arc-shaped pressure groove is provided with an anti-slip pad.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model can fix the vertical support rod to the cylinder head with positioning bolts, adjust the position of the crossbar with the help of the handle, and use the lifting drive component to drive the compression top plate and pressure head to move above the valve spring. After the spring specifications are accurately matched by the adjustment mechanism, the lifting drive component applies pressure to compress the spring. After the locking plate is exposed, the disassembly and assembly can be completed. In the end, the valve spring can be disassembled and assembled conveniently, safely and efficiently, reducing labor intensity and the risk of component damage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a bottom view of the present invention;

[0015] Figure 3 This is a side sectional view of the present invention;

[0016] Figure 4 for Figure 3 Enlarged view of part A in the image.

[0017] In the diagram: 1. Horizontal bar, 2. Handle, 3. Connecting seat, 4. Vertical support rod, 5. Positioning bolt, 6. Slide block, 7. Locking bolt, 8. Screw, 9. Crank handle, 10. Compression top plate, 11. Limiting rod, 12. Scale line, 13. T-shaped slide, 14. Slider, 15. Connecting plate, 16. Pressure head, 17. Arc-shaped pressure groove, 18. Bidirectional screw, 19. Adjustment knob. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Example 1

[0020] Please refer to Figure 1-4 As shown, this utility model provides a tool for disassembling and assembling valve springs of a diesel engine in a railway locomotive, including a support assembly, a lifting drive assembly, an adjustment mechanism, and pressure heads. The support assembly includes two sets of horizontal bars 1 and a vertical support rod 4. The two sets of horizontal bars 1 are arranged in parallel, with a handle 2 at one end and a connecting seat 3 at the end away from the handle 2. The vertical support rod 4 is vertically fixed to the bottom of the connecting seat 3, and its bottom end is provided with a positioning bolt 5 that matches the preset positioning hole of the cylinder head. The lifting drive assembly is slidably connected to the two sets of horizontal bars 1. The bottom of the lifting drive assembly is provided with a compression top plate 10, and the adjustment mechanism is installed at the bottom of the compression top plate 10, with two sets of pressure heads 16 connected to the bottom.

[0021] Specifically, the positioning bolt 5 at the bottom of the vertical support rod 4 is screwed into the preset positioning hole in the cylinder head. The positions of the two sets of crossbars 1 are adjusted by the handle 2 to match the valve spring. The lifting drive assembly slidably connected to the two sets of crossbars 1 can drive the compression top plate 10 to move above the valve spring. The distance between the two sets of pressure heads 16 can be adjusted by the adjustment mechanism at the bottom of the compression top plate 10 to match the specifications of the valve spring. The lifting drive assembly can drive the compression top plate 10 and the pressure head 16 to contact the upper end of the valve spring and continuously compress the spring. Once the locking plate is exposed, the disassembly and assembly operation can be completed. Thus, through the above structure, the valve spring can be disassembled and assembled conveniently, safely, and efficiently, reducing labor intensity and the risk of component damage.

[0022] The lifting drive assembly includes a slide block 6, with a screw rod 8 threadedly connected to the center of the slide block 6. One end of the screw rod 8 is equipped with a crank handle 9, and the other end is rotatably connected to the top surface of the compression top plate 10. Limiting rods 11 are provided near both ends of the top of the compression top plate 10. Both sets of limiting rods 11 are slidably connected to the slide block 6. By rotating the crank handle 9 at one end of the screw rod 8, the screw rod 8 and the slide block 6 are connected, and the limiting rods 11 at both ends of the top of the compression top plate 10 are slidably limited to the slide block 6. This can drive the compression top plate 10, which is rotatably connected to the other end of the screw rod 8, to move vertically up and down. This can drive the pressure head 16 connected to the bottom adjustment mechanism of the compression top plate 10 to move closer to or away from the valve spring, thereby compressing and resetting the spring. Through this design, the compression top plate 10 and the two sets of pressure heads 16 can be raised and lowered smoothly and accurately. The operation is labor-saving and the force is applied evenly. This can effectively avoid spring skewing and component damage, and improve the stability and safety of disassembly and assembly operations.

[0023] One of the limit rods 11 has scale lines 12 on its surface. The scale lines 12 on the surface of the limit rods 11 can intuitively display the lifting stroke of the compression top plate 10, accurately control the compression of the valve spring, avoid excessive compression that could cause plastic deformation of the spring, and improve the accuracy and safety of disassembly and assembly operations.

[0024] The slide block 6 has a locking bolt 7 threaded on one side to fix its position. The locking bolt 7 on one side of the slide block 6 can fix its relative position with the crossbar 1 after the slide block 6 is adjusted to the target position, so as to prevent the slide block from shifting during operation and ensure the accuracy of the pressure head and the safety of operation.

[0025] The adjustment mechanism includes an adjustment knob 19. A T-shaped groove 13 is formed at the bottom of the compression top plate 10, with two sets of sliders slidably connected to its inner side. The bottoms of both sets of sliders are connected to corresponding pressure heads 16 via connecting plates 15. A bidirectional screw 18, threadedly connected to the two sets of sliders 14, is rotatably connected to the inner side of the T-shaped groove 13. One end of the screw 18 extends to the outside of the compression top plate 10 and is connected to the adjustment knob 19. Rotating the adjustment knob 19 on the outside of the compression top plate 10 drives the bidirectional screw 18 on the inner side of the T-shaped groove 13. Rotation, utilizing the threaded connection between the bidirectional screw 18 and the two sets of sliders 14, combined with the sliding limit of the T-shaped slide groove 13, allows the two sets of sliders 14 to move synchronously in opposite directions along the T-shaped slide groove 13. This enables the two sets of pressure heads 16 to quickly adjust their spacing via the connecting plate 15, adapting to valve springs of different diameters. Furthermore, through configuration, the spacing between the two sets of pressure heads 16 can be adjusted synchronously and precisely, offering wide adaptability and convenient operation. It eliminates the need to adjust individual pressure heads 16 separately, improving work efficiency and the alignment of the pressure heads 16.

[0026] The bottom of the pressure head 16 is provided with an arc-shaped pressure groove 17 that is adapted to the upper end face of the valve spring. The inner side of the arc-shaped pressure groove 17 is provided with an anti-slip pad. The arc-shaped pressure groove 17 at the bottom of the pressure head 16 can fit precisely with the upper end face of the valve spring. The inner anti-slip pad can increase the friction and prevent the pressure head 16 from slipping or the spring from shifting during operation, thus ensuring the stability of pressure application and preventing damage to the spring.

[0027] Working principle: First, the positioning bolt 5 at the bottom of the vertical support rod 4 is screwed into the pre-set positioning hole in the cylinder head to fix the tool. The positions of the two sets of crossbars 1 can be adjusted by the handle 2 to match the valve spring. Then, the slide block 6 on the crossbar 1 is slid to the target position, and the locking bolt 7 on one side of the slide block 6 is tightened to fix its position. Then, turning the adjustment knob 19 can drive the bidirectional screw 18 in the T-shaped slide groove 13 to rotate, so that the two sets of sliders 14 move towards or in opposite directions along the slide groove. The distance between the two sets of pressure heads 16 can be adjusted by the connecting plate 15 to match the valve spring specifications. Subsequently... Turning the crank handle 9 drives the screw 8 to rotate. Under the threaded connection between the screw 8 and the slide 6 and the sliding limit action of the limiting rod 11, the compression top plate 10 can be driven to descend vertically, allowing the arc-shaped pressure groove 17 at the bottom of the pressure head 16 to fit against the upper end face of the valve spring and continuously apply pressure. The compression stroke can be controlled by the scale line 12 on the surface of the limiting rod 11. After the locking plate is exposed, the disassembly and assembly operations can be completed. After the operation is completed, turn the crank handle 9 in the opposite direction to reset the compression top plate 10. Loosen the locking bolt 7 to move the slide 6 to the next target position or remove the tool, thus completing the entire operation process.

[0028] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0029] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A tool for disassembling and assembling valve springs of a railway diesel locomotive, comprising a support assembly, a lifting drive assembly, an adjustment mechanism, and a pressure head, characterized in that: The support assembly includes two sets of horizontal bars (1) and a vertical support rod (4). The two sets of horizontal bars (1) are arranged in parallel and have handles (2) at their ends. A connecting seat (3) is provided at one end away from the handle (2). The vertical support rod (4) is vertically fixed to the bottom of the connecting seat (3). A positioning bolt (5) is provided at its bottom end that matches the preset positioning hole of the cylinder head. The lifting drive assembly is slidably connected to the two sets of horizontal bars (1). A compression top plate (10) is provided at the bottom of the lifting drive assembly. The adjustment mechanism is installed at the bottom of the compression top plate (10) and is connected to two sets of pressure heads (16).

2. The tool for disassembling and assembling valve springs of a railway diesel locomotive according to claim 1, characterized in that: The lifting drive assembly includes a slide (6), with a screw (8) threadedly connected to the center of the slide (6). One end of the slide (6) is provided with a crank (9), and the other end is rotatably connected to the top surface of the compression top plate (10). The top of the compression top plate (10) is provided with limit rods (11) near both ends, and both sets of limit rods (11) are slidably connected to the slide (6).

3. The tool for disassembling and assembling valve springs of a railway diesel locomotive according to claim 2, characterized in that: One of the limiting rods (11) has scale lines (12) on its surface.

4. The tool for disassembling and assembling valve springs of a railway diesel locomotive according to claim 2, characterized in that: A locking bolt (7) is threaded onto one side of the slide (6) to fix the position of the slide (6).

5. The tool for disassembling and assembling valve springs of a railway diesel locomotive according to claim 1, characterized in that: The adjustment mechanism includes an adjustment knob (19). The bottom of the compression top plate (10) is provided with a T-shaped groove (13), and two sets of sliders (14) are slidably connected to the inside. The bottom of the two sets of sliders is connected to the corresponding pressure head (16) through a connecting plate (15). The inside of the T-shaped groove (13) is rotatably connected to a bidirectional screw (18) that is threadedly connected to the two sets of sliders (14). One end of the screw extends to the outside of the compression top plate (10) and is connected to the adjustment knob (19).

6. The tool for disassembling and assembling valve springs of a railway diesel locomotive according to claim 5, characterized in that: The bottom of the pressure head (16) is provided with an arc-shaped pressure groove (17) that is adapted to the upper end face of the valve spring, and the inner side of the arc-shaped pressure groove (17) is provided with an anti-slip pad.

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