Universal fixture for polishing straight fluted edge of plunger

Abstract

The utility model relates to a universal fixture for plunger straight groove edge polishing, which is mounted on a polishing wheel side of a worktable and comprises a swing rod rotationally connected onto the worktable through a rotary support component, a swing rod driving component for driving the swing rod to swing left and right is arranged close to the middle of the swing rod, and a plunger mounting hole is arranged on the upper portion of the swing rod corresponding to a polishing wheel. A positioning sleeve for inserting a plunger is mounted in the plunger mounting hole; a limiting plate for preventing the plunger from moving outwards along the positioning sleeve is installed on the swing rod above the positioning sleeve, a limiting groove abutting against one clamping face of the plunger flange face of the plunger is formed in the limiting plate, and a limiting block for preventing the plunger from rotating is installed on the swing rod below the positioning sleeve. The limiting block abuts against the other clamping face of the plunger flange face. By means of the plunger straight groove edge polishing device, production efficiency is improved, polishing quality is guaranteed, operation safety is enhanced, and an efficient and reliable solution is provided for plunger straight groove edge polishing operation.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the plunger processing technical field in fuel injection system especially relates to a general fixture of plunger straight slot edge polishing. BACKGROUND

[0002] In the fuel injection system, the fuel injector as a key component, its performance directly affects the engine combustion efficiency and emission quality. One of the core components of the fuel injector is the plunger, the surface processing quality, especially the smoothness of the straight slot part, has a decisive influence on the uniformity of fuel injection and atomization effect. Traditionally, after the plunger straight slot processing is completed, the straight edge on both sides often has burrs, if these burrs are not removed in time, not only will affect the fuel flow, but also may exacerbate the wear of the plunger and the matching components, shorten the service life of the fuel injector.

[0003] In the past, the method of removing these burrs mainly depends on manual holding of the plunger, and the straight slot edge is closely attached to the polishing wheel for polishing treatment. This manual operation method has many problems:

[0004] Low production efficiency: since the polishing force and time control completely depends on the experience and feeling of the operator, the processing cycle is unstable, and the production efficiency is difficult to improve.

[0005] Poor quality stability: the skill difference between different operators, and the fluctuation of the same operator at different times and physical states, may lead to inconsistency of polishing quality, affecting the reliability and consistency of the final product.

[0006] Safety hazards: handheld operation increases the risk in the operation process, such as cuts, burns and other work accidents caused by improper operation, which threatens the safety of the operator.

[0007] High cost: for different specifications and sizes of plunger, the traditional method may need to design and manufacture special fixtures, which not only increases the initial investment cost, but also limits the flexibility of the production line, which is not conducive to quickly respond to market changes.

[0008] In view of the above problems, it is particularly important to design a fixture that can be used for polishing the straight slot of various specifications of plunger. Such a fixture not only can improve the production efficiency, ensure the consistency of polishing quality through standardized work process, but also can effectively eliminate the safety hazards caused by manual operation, and reduce the additional cost caused by frequent replacement of fixtures through universal design, so as to improve the production efficiency and economic benefit. INVENTION CONTENTS

[0009] In view of the problems existing in the prior art, the utility model provides a general fixture of plunger straight slot edge polishing.

[0010] The utility model discloses a kind of plunger straight slot side polishing general fixture, it is installed in the polishing wheel side of workbench, it is characterized in that, including the swing bar on workbench by rotary support assembly rotation connection, swing bar driving assembly for driving swing bar left and right swing is equipped in the middle part close to swing bar, the upper portion of swing bar is equipped with plunger mounting hole corresponding polishing wheel position, the positioning sleeve for inserting plunger is installed in plunger mounting hole;The limiting plate for preventing plunger from moving outward along positioning sleeve is installed on the swing bar above the positioning sleeve, and the limiting groove of one of the flange surfaces of plunger abutting is equipped on the limiting plate, the limiting block for preventing plunger from rotating is installed on the swing bar below the positioning sleeve, and the limiting block abuts the other clamping surface of plunger flange surface.

[0011] Further preferably, the rotary support assembly includes a positioning seat connected vertically to the side wall of the workbench, a rotary sleeve is installed at the end of the positioning seat, the swing bar is sleeved on the rotary sleeve, and a pressing plate is installed on the positioning seat outside the swing bar.

[0012] Further preferably, the swing bar driving assembly includes a moving slot, one end of the moving slot is connected with a screw rod, the screw rod is connected with a gusset plate, the gusset plate is fixedly installed on the side of the workbench, and a rotating wheel is matched with the screw rod outside the gusset plate; an eccentric wheel is installed in the moving slot through a rotating shaft, the outer circumference of the eccentric wheel is provided with a positioning plane; a swing arm is connected to the moving slot through a rotating shaft, a hand wheel is provided at the end of the swing arm in a direction perpendicular to the swing arm; the swing bar side wall abuts the eccentric wheel in the moving slot; an elastic pressing assembly abutting the swing bar side wall is provided outside the swing bar in the moving slot, so that the swing bar and the cam are always in a state of adhesion.

[0013] Further preferably, the elastic pressing assembly includes a spring pressing plate, the spring pressing plate is fixedly installed on the outer end face of the moving slot, a pressing screw rod is passed through the center of the spring pressing plate, and a pressing head is installed at the end of the pressing screw rod in the moving slot; the ball head at the end of the pressing head abuts the swing bar, a pressing spring is provided on the pressing screw rod, an inner adjusting nut is provided on the pressing screw rod close to the pressing head to adjust the pressing force of the pressing spring; an outer adjusting nut is provided on the pressing screw rod outside the spring pressing plate.

[0014] Further preferably, the limiting plate is installed on a limiting rod, one end of the limiting rod is screwed on the upper end of the swing bar, a pressing spring is sleeved on the limiting rod, the pressing spring abuts the limiting plate, and locking nuts are provided on the limiting rod outside the swing bar and the limiting plate.

[0015] Further preferably, the limiting block is connected to a mounting plate, the mounting plate is connected to the swing bar through a fastener, and a plurality of limiting block mounting holes are provided on the mounting plate in a height direction.

[0016] The utility model has the advantages and technical effects: the utility model provides the general fixture of plunger straight slot side polishing, through a series of careful design technical features, the efficiency, accuracy and safety of polishing operation are improved obviously. The rotary support assembly ensures the stable rotation of the swing rod, which provides the possibility for omnidirectional polishing. The swing rod driving assembly realizes the accurate control of the swing rod swing amplitude and frequency through the cooperation of the eccentric wheel and the elastic compression assembly, while maintaining the close fit of the swing rod and the polishing wheel, improving the polishing quality. The design of the limiting plate and the limiting block effectively prevents the axial movement and rotation of the plunger during polishing, ensuring the uniformity and consistency of the polishing effect. In addition, the fixture also has high universality and flexibility, which can quickly adapt to the polishing needs of different specifications of plungers, reducing the production cost. Overall, the utility model not only improves the production efficiency and ensures the polishing quality, but also enhances the safety of operation, providing an efficient and reliable solution for the polishing operation of the plunger straight slot side. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structure schematic diagram of the utility model embodiment;

[0018] Figure 2 is Figure 1 A-A sectional view in the

[0019] Figure 3 is Figure 1 left view of

[0020] Figure 4 is a limiting plate structure schematic diagram;

[0021] Figure 5 is a side view;

[0022] Figure 6 is a plunger structure schematic diagram.

[0023] 1, workbench; 2, swing rod; 2-1, plunger mounting hole; 3, swing rod driving assembly; 3-1, moving groove; 3-2, screw rod; 3-3, angle plate; 3-4, rotating wheel; 3-5, eccentric wheel; 3-50, positioning plane; 3-6, swing arm; 3-7, hand wheel; 3-8, rotating shaft; 3-9, return spring; 4, positioning sleeve; 5, limiting plate; 5-1, limiting groove; 5-2, limiting rod; 5-3, compression spring; 5-4, locking nut; 6, limiting block; 6-1, mounting plate; 6-2, limiting block mounting hole; 7, rotary support assembly; 7-1, positioning seat; 7-2, rotary sleeve; 7-3, pressing plate; 8, elastic compression assembly; 8-1, spring compression plate; 8-2, compression screw rod; 8-3, pressure head; 8-4, compression spring; 8-5, inner adjusting nut; 8-6, outer adjusting nut; 9, plunger; 9-1, straight slot; 9-2, flange face. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0025] Please refer to Figures 1 to 5 A kind of plunger straight slot side polishing general fixture, it is installed in the polishing wheel side of workbench 1, including the swing bar 2 of rotation connection workbench by rotary support assembly 7, this design makes the swing bar can flexibly rotate on workbench, provides the possibility for the all-around polishing of plunger, while ensuring the stability and durability of fixture in polishing process, reduces the phenomenon of uneven polishing caused by fixture shaking. Near the middle part of swing bar is equipped with swing bar drive assembly 3 that drives swing bar to swing left and right, the swing bar drive assembly can accurately control the swing amplitude and frequency of swing bar, continuous polishing operation, significantly improves production efficiency, while ensuring the stability and consistency of polishing quality, reduces the uncertainty caused by manual intervention. The upper portion of the swing bar is provided with plunger mounting hole 2-1 corresponding to the position of polishing wheel, this design ensures that the plunger can be accurately and stably installed on the fixture, and the position is fixed relative to the polishing wheel, which is beneficial to realize accurate polishing effect and avoid poor polishing caused by plunger position deviation. Positioning sleeve 4 for inserting plunger 9 is installed in the plunger mounting hole;The design of positioning sleeve makes different specifications of plunger can be quickly and accurately positioned, improves versatility and flexibility, reduces production cost, while ensuring the stability of plunger during polishing. The limiting plate 5 for preventing plunger from moving outward along the positioning sleeve is installed on the swing bar above the positioning sleeve, the limiting groove 5-1 of one of the clamping surfaces of the plunger flange surface is provided on the limiting plate, the design of limiting plate and limiting groove effectively prevents the axial movement of plunger during polishing straight slot 9-1, ensures the continuity and stability of polishing operation, while avoiding safety accidents caused by damage or flying out of plunger due to movement. Limiting block 6 for preventing plunger from rotating is installed on the swing bar below the positioning sleeve, and the limiting block 6 is preferably a hexagonal nut;The side surface of the limiting block abuts against the other clamping surface of plunger flange surface 9-2. The existence of limiting block ensures that the plunger will not rotate during polishing, thereby ensuring the uniformity and consistency of polishing effect, avoiding uneven polishing marks or missing polishing phenomenon caused by plunger rotation.

[0026] Further preferably, the rotary support assembly 7 comprises a positioning seat 7-1 connected vertically to the side wall of the workbench, the end of the positioning seat is provided with a rotary sleeve 7-2, the swing rod sleeve is installed on the rotary sleeve, and a pressing plate 7-3 is installed on the positioning seat outside the swing rod, thereby providing a stable and flexible rotating platform for the swing rod. In particular, the pressing plate added to the positioning seat outside the swing rod significantly improves the stability of the entire clamp. The pressing plate not only effectively prevents the swing rod from shaking during operation, ensuring the accuracy of the polishing operation, but also reduces the gap between the swing rod and the rotary sleeve, thereby reducing wear during long-term operation and prolonging the service life of the clamp. In addition, the easy-to-disassemble design of the pressing plate greatly facilitates the adjustment and maintenance of the clamp, enabling the production line to quickly adapt to the polishing needs of plungers of different specifications. At the same time, as a safety barrier, the pressing plate effectively prevents the swing rod from accidentally falling off, providing a safer working environment for the operator.

[0027] Further preferably, the swing rod driving assembly 3 comprises a moving groove 3-1, one end of the moving groove is connected with a screw rod 3-2, the screw rod is connected with a gusset plate 3-3, the gusset plate is fixedly installed on the side of the workbench, a rotating wheel 3-4 is arranged on the screw rod outside the gusset plate, and a return spring 3-8 is arranged on the screw rod inside the gusset plate; an eccentric wheel 3-5 is installed in the moving groove through a rotating shaft, and a positioning plane 3-50 is arranged on the outer circumference of the eccentric wheel; a swing arm 3-6 is connected to the moving groove outside the rotating shaft 3-8, and a hand wheel 3-7 is arranged at the end of the swing arm perpendicular to the swing arm direction; the eccentric wheel abuts against the side wall of the swing rod in the moving groove; and an elastic pressing assembly 8 is arranged on the outside of the swing rod in the moving groove to abut against the side wall of the swing rod, so that the swing rod and the cam are always in a close contact state.

[0028] The swing rod driving assembly is designed by introducing elements such as a moving groove, a screw rod, a gusset plate, a rotating wheel, an eccentric wheel, a swing arm, and a hand wheel, thereby constructing an efficient and controllable driving system. The cooperation of the moving groove and the screw rod enables the eccentric wheel to accurately move on a predetermined track, thereby driving the swing rod to stably swing left and right. The design of the positioning plane of the eccentric wheel ensures the stability and continuity of the swing rod, thereby improving the accuracy of the polishing operation. At the same time, the swing arm and the hand wheel provide an intuitive and convenient control means for the operator, which can easily adjust the swing amplitude and frequency of the swing rod according to actual needs. In addition, the elastic pressing assembly arranged in the moving groove always maintains the close contact between the swing rod and the eccentric wheel, thereby not only enhancing the reliability of the transmission but also effectively absorbing the vibration during the polishing process, thereby further improving the polishing quality. In summary, this technical feature realizes the efficiency, stability, and controllability of the swing rod driving through fine mechanical structure design, thereby providing strong technical support for the polishing operation of the straight slot edge of the plunger, significantly improving the production efficiency and polishing effect.

[0029] Further preferably, the elastic pressing assembly 8 comprises a spring pressing plate 8-1 fixedly installed on the outer end face of the moving groove 3-1, a pressing screw 8-2 is arranged in the center of the spring pressing plate, and a pressing head 8-3 is installed at the end of the pressing screw in the moving groove; the ball head at the end of the pressing head abuts against the swing lever 2, a pressing spring 8-4 is arranged on the pressing screw, an inner adjusting nut 8-5 is arranged on the pressing screw close to the pressing head, and an outer adjusting nut 8-6 is arranged on the pressing screw outside the spring pressing plate.

[0030] The innovative design of the elastic pressing assembly provides stable and adjustable pressing force for the swing lever through the ingenious combination of the spring pressing plate, the pressing screw, the pressing head, the pressing spring, the inner adjusting nut and the outer adjusting nut. The fixed connection of the spring pressing plate and the pressing screw ensures that the pressing head can always abut against the swing lever closely, effectively preventing shaking and deviation during polishing. The double design of the inner adjusting nut and the outer adjusting nut enables the operator to easily adjust the pressing force of the pressing spring according to actual needs, which not only ensures sufficient pressing effect, but also avoids damage to the swing lever caused by excessive pressing force. This technical feature not only improves the stability and precision of polishing operation, but also endows the production line with higher flexibility and adaptability, which can meet the polishing needs of plungers of different specifications, significantly improving production efficiency and product quality.

[0031] Further preferably, a limiting plate is installed on a limiting rod 5-2, one end of the limiting rod is screwed on the upper end of the swing lever, a pressing spring 5-3 is sleeved on the limiting rod, the pressing spring abuts against the limiting plate, and a locking nut 5-4 is arranged on the limiting rod outside the swing lever and the limiting plate. The combination design of the limiting rod, the pressing spring and the locking nut realizes the adjustable and stable position of the limiting plate. The pressing spring ensures that the limiting plate closely fits the plunger to prevent shifting, and the locking nut ensures the stability of the position of the limiting plate. This design improves the adaptability and reliability of the clamp, ensuring the precision of polishing operation.

[0032] Further preferably, the limiting block 6 is connected to a mounting plate 6-1, the mounting plate is connected to the swing lever 2 through fasteners, and a plurality of limiting block mounting holes 6-2 are arranged on the mounting plate in the height direction. The flexible adjustment of the position of the limiting block is realized, which meets the needs of plungers of different specifications. The fastener connection ensures that the mounting plate is stable on the swing lever, improves the universality and adaptability of the clamp, simplifies the operation process and improves the production efficiency.

[0033] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A general jig for straight side polishing of a plunger with a straight groove, which is installed at a polishing wheel side of a work table, characterized in that, The application relates to a rotary support assembly and a swing rod driving assembly, and a polishing device comprising the rotary support assembly and the swing rod driving assembly.

2. The straight slot universal fixture for cylindrical plungers with straight side polishing according to claim 1, characterized in that: The rotary support assembly comprises a positioning seat vertically connected to the side wall of the workbench, and a rotary sleeve is mounted at the end of the positioning seat, the swing rod is sleeved on the rotary sleeve, and a pressing plate is mounted on the positioning seat outside the swing rod.

3. The straight slot universal fixture for cylindrical plungers with straight side polishing as claimed in claim 1 wherein: The swing rod driving assembly comprises a moving groove, one end of the moving groove is connected with a screw rod, the screw rod is connected with an angle plate, the angle plate is fixedly installed on the side of the workbench, a rotating wheel is matched with the screw rod outside the angle plate, an eccentric wheel is installed in the moving groove through a rotating shaft, the outer circumference of the eccentric wheel is provided with a positioning plane, a swing arm is connected to the moving groove through a rotating shaft, a hand wheel is arranged at the end of the swing arm in the vertical direction of the swing arm, the eccentric wheel abuts against the side wall of the swing rod in the moving groove, and an elastic pressing assembly is arranged outside the swing rod in the moving groove and abuts against the side wall of the swing rod, so that the swing rod and the cam are always in the adhering state.

4. The straight slot universal fixture for cylindrical plungers with straight side polishing according to claim 3, characterized in that: The elastic pressing assembly comprises a spring pressing plate, the spring pressing plate is fixedly installed on the outer end face of the moving groove, a pressing screw rod is arranged in the center of the spring pressing plate, a pressing head is mounted at the end of the pressing screw rod in the moving groove, the ball head at the end of the pressing head abuts against the swing rod, a pressing spring is arranged on the pressing screw rod, an inner adjusting nut is arranged on the pressing screw rod close to the pressing head and used for adjusting the pressing force of the pressing spring, and an outer adjusting nut is arranged on the pressing screw rod outside the spring pressing plate.

5. The straight slot universal fixture for cylindrical plungers with straight side polishing according to claim 1, characterized in that: The limiting plate is mounted on a limiting rod, one end of the limiting rod is screwed on the end of the swing rod, a pressing spring is sleeved on the limiting rod, the pressing spring abuts against the limiting plate, and locking nuts are arranged on the limiting rod outside the swing rod and the limiting plate.

6. The straight slot universal fixture for cylindrical plungers with straight side polishing according to claim 1, characterized in that: The limiting block is connected to a mounting plate, the mounting plate is connected to the swing rod through fasteners, and a plurality of limiting block mounting holes are arranged on the mounting plate in the height direction.

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