Positioning tool for polishing diesel engine plunger and barrel assembly

Abstract

The utility model relates to the technical field of diesel engine plunger and barrel assembly machining equipment, in particular to a positioning tool for diesel engine plunger and barrel assembly polishing. According to the technical scheme, the positioning device comprises a supporting plate, positioning boxes are connected to one side of the supporting plate in a sliding mode, and the three positioning boxes are arranged on one side of the supporting plate in a circumferential array mode. According to the utility model, the positioning box, the external expansion pushing block, the internal contraction pushing block, the extrusion block, the telescopic screw rod, the pushing plate and the fixing sheet are matched with one another. According to the device, the mode that a telescopic screw rod controls an extrusion block to move is adopted, the extrusion block extrudes an external expansion pushing block or an internal contraction pushing block, so that different pushing plates are controlled to drive a fixing piece to protrude out of the interior of a positioning box, and then the fixing piece is fixed inside or outside a diesel engine plunger and barrel assembly; the problem that when the interior or the exterior of the diesel engine plunger and barrel assembly is fixed, a corresponding clamp needs to be selected, and consequently the working efficiency is low is solved, and the working efficiency when the diesel engine plunger and barrel assembly is polished is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of diesel engine plunger assembly processing equipment, and in particular to a positioning fixture for polishing diesel engine plunger assemblies. Background Technology

[0002] A diesel engine plunger assembly refers to a pair of precision components in a diesel engine's fuel injection pump, mainly composed of a plunger and a plunger sleeve. They play a crucial role in the injection pump, controlling fuel intake and output through a precise fit to ensure fuel is injected into the cylinder at high pressure and in a measured manner. During the production of diesel engine plunger assemblies, the inner and outer walls of the assemblies need to be polished, and these walls must be fixed during polishing.

[0003] When polishing the outer wall, a clamp that opens from the inside out is used to fix the diesel engine plunger assembly. When polishing the inner wall, a clamp that contracts from the outside in is used to fix the diesel engine plunger assembly to ensure that there are no dead corners during polishing.

[0004] However, when fixing the inner or outer wall of a diesel engine plunger assembly, it is necessary to select a suitable fixture to position the diesel engine plunger assembly. However, the fixture needs to be installed every time it is replaced, which reduces the production efficiency of the diesel engine plunger assembly. Therefore, this application proposes a positioning fixture for polishing diesel engine plunger assemblies. Utility Model Content

[0005] The purpose of this utility model is to address the problem in the background art that when fixing the inner or outer wall of a diesel engine plunger assembly, it is necessary to select a suitable fixture to position the diesel engine plunger assembly. However, each time the fixture needs to be installed, the production efficiency of the diesel engine plunger assembly is reduced. The present invention proposes a positioning fixture for polishing diesel engine plunger assemblies.

[0006] The technical solution of this utility model: a positioning fixture for polishing diesel engine plunger assembly, including a support plate, a positioning box slidably connected to one side of the support plate, three positioning boxes arranged in a circumferential array on one side of the support plate, a push plate slidably connected inside the positioning box, two sets of push plates arranged symmetrically, a fixing plate fixedly connected to the push plate away from the opposite side, multiple sets of fixing plates arranged in a linear array, one set of push plates fixedly connected to an outwardly expanding push block on the opposite side, the other set of push plates fixedly connected to an inwardly contracting push block on the opposite side away from the outwardly expanding push block, a squeezing block provided between the outwardly expanding push block and the inwardly contracting push block, and a control component provided on one side of the squeezing block.

[0007] Optionally, the control component includes a telescopic screw, one end of which is rotatably connected to one side of the extrusion block, and the telescopic screw is rotatably connected to the inside of the positioning box at a position away from the extrusion block. The outward expansion push block and the inward retraction push block are arranged in a trapezoidal shape.

[0008] Optionally, a limiting rod is slidably connected inside the push plate. There are four sets of limiting rods arranged in a rectangular array. The limiting rods are fixedly connected inside the positioning box. A return spring is fixedly connected to the push plate on the side away from the opposite side. The return spring is located outside the limiting rod.

[0009] Optionally, an opening / closing rod is rotatably connected to the outside of the positioning box away from the telescopic screw, and a sliding groove is provided on the support plate near the opening / closing rod, with the opening / closing rod slidably connected to the inside of the sliding groove.

[0010] Optionally, the end of the opening / closing rod away from the positioning box is rotatably connected to a pressing plate, and the pressing plate is equipped with a control component.

[0011] Optionally, the control component includes a rotating screw that is slidably connected inside the extrusion plate, and a nut that is rotatably connected to the outside of the rotating screw.

[0012] Optionally, the nut abuts against the side of the extrusion plate away from the coupling rod, and one end of the rotating screw is rotatably connected to the side of the support plate away from the positioning box.

[0013] Optionally, an auxiliary spring is fixedly connected to the outside of the positioning box, and a positioning block is fixedly connected to the end of the auxiliary spring away from the positioning box. The positioning block is fixedly connected to one side of the support plate, and a telescopic rod is fixedly connected between the positioning box and the positioning block. The telescopic rod is located inside the auxiliary spring.

[0014] Compared with the prior art, this application includes at least one of the following beneficial technical effects:

[0015] This invention utilizes the interplay between a positioning box, an outward-expanding pushing block, an inward-retracting pushing block, a pressing block, a telescopic screw, a pushing plate, and a fixing plate. The device employs a telescopic screw to control the movement of the pressing block, allowing it to press against either the outward-expanding or inward-retracting pushing block. This, in turn, controls different pushing plates to propel the fixing plate out of the positioning box, thus fixing the fixing plate inside or outside the diesel engine plunger assembly. This solves the problem of low work efficiency caused by the need to select appropriate clamps when fixing diesel engine plunger assemblies internally or externally, and improves the work efficiency during the polishing of diesel engine plunger assemblies. Attached Figure Description

[0016] Figure 1 A schematic diagram of the overall structure of a positioning fixture for polishing diesel engine plunger assemblies;

[0017] Figure 2 A schematic diagram of the extrusion plate structure for a positioning fixture used for polishing diesel engine plunger assemblies;

[0018] Figure 3 A schematic diagram of the overall cross-sectional structure of a positioning fixture for polishing diesel engine plunger assemblies;

[0019] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the positioning box;

[0021] Figure 6 for Figure 5 Enlarged structural diagram at point B.

[0022] Reference numerals in the attached diagram: 1. Support plate; 2. Positioning box; 3. Outward expanding push block; 4. Inward retracting push block; 5. Pressing block; 6. Telescopic screw; 7. Push plate; 8. Fixing plate; 9. Opening and closing rod; 10. Sliding groove; 11. Auxiliary spring; 12. Positioning block; 13. Telescopic rod; 14. Limiting rod; 15. Return spring; 16. Pressing plate; 17. Nut; 18. Rotating screw. Detailed Implementation

[0023] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1 , Figure 4 and Figure 5 As shown, the positioning fixture for polishing diesel engine plunger assembly proposed in this utility model includes a support plate 1. A positioning box 2 is slidably connected to one side of the support plate 1. There are three positioning boxes 2 arranged in a circumferential array on one side of the support plate 1. A push plate 7 is slidably connected inside the positioning box 2. There are two sets of push plates 7 arranged symmetrically. A fixing plate 8 is fixedly connected to the push plate 7 away from the opposite side. There are multiple sets of fixing plates 8 arranged in a linear array. One set of push plates 7 is fixedly connected to an outwardly expanding push block 3 on the opposite side. The other set of push plates 7 is fixedly connected to an inwardly contracting push block 4 on the opposite side away from the outwardly expanding push block 3. A squeezing block 5 is provided between the outwardly expanding push block 3 and the inwardly contracting push block 4. A control component is provided on one side of the squeezing block 5.

[0026] The control components include a telescopic screw 6, one end of which is rotatably connected to one side of the extrusion block 5, and the outside of the telescopic screw 6 is rotatably connected to the inside of the positioning box 2 away from the extrusion block 5. The outward expansion push block 3 and the inward retraction push block 4 are arranged in a trapezoidal shape.

[0027] like Figure 6As shown, a limit rod 14 is slidably connected inside the push plate 7. There are four sets of limit rods 14 arranged in a rectangular array. The limit rods 14 are fixedly connected inside the positioning box 2. A reset spring 15 is fixedly connected to the push plate 7 on the opposite side away from the limit rods 14. The reset spring 15 is located outside the limit rods 14.

[0028] like Figure 2 The positioning box 2 is rotatably connected to the opening and closing rod 9 at a position away from the telescopic screw 6. The support plate 1 is provided with a sliding groove 10 near the opening and closing rod 9. The opening and closing rod 9 is slidably connected to the inside of the sliding groove 10.

[0029] Please see Figure 3 The opening and closing rod 9 is rotatably connected to a pressing plate 16 at the end away from the positioning box 2. The pressing plate 16 is equipped with a control component, which includes a rotating screw 18. The rotating screw 18 is slidably connected inside the pressing plate 16. A nut 17 is rotatably connected to the outside of the rotating screw 18. The nut 17 abuts against the side of the pressing plate 16 away from the opening and closing rod 9. One end of the rotating screw 18 is rotatably connected to the side of the support plate 1 away from the positioning box 2.

[0030] In this embodiment, when polishing the inside of the diesel engine plunger assembly, the fixing plate 8 needs to be fixed to the outside of the diesel engine plunger assembly. First, rotate the telescopic screw 6 to control the extrusion block 5 to move inward toward the position of the inward pushing block 4. When the extrusion block 5 moves inward toward the inward pushing block 4, the extrusion block 5 will first press along the inclined surface of the inward pushing block 4 onto the pushing plate 7. When the pushing plate 7 moves the fixing plate 8 toward the outside of the positioning box 2, it will press the return spring 15. When the plane of the extrusion block 5 is in contact with the plane of the inward pushing block 4, it proves that the pushing plate 7 has driven the fixing plate 8 to protrude from the inside of the positioning box 2, thereby allowing the fixing plate 8 to be in contact with the outside of the diesel engine plunger assembly. In this way, the outside of the diesel engine plunger assembly can be fixed, and then the inner wall of the diesel engine plunger assembly can be polished.

[0031] When fixing diesel engine plunger assemblies with different outer diameters, the nut 17 can be rotated to move outside the rotating screw 18. In this way, the nut 17 will squeeze the telescopic screw 6 to slide along the outside of the rotating screw 18, thereby allowing the squeezing plate 16 to drive the opening and closing rod 9 to slide inside the sliding groove 10. In this way, the opening and closing rod 9 can control the positioning box 2 to open and close.

[0032] When it is necessary to fix the inside of the diesel engine plunger assembly, first rotate the telescopic screw 6 in the opposite direction so that the telescopic screw 6 controls the extrusion block 5 to move outward to the push block 3. After the extrusion block 5 disengages from the position of the inward push block 4, the return spring 15 will push the push plate 7 to slide along the limit rod 14, so that the push plate 7 will return to its original position. The nut 17 is used to prevent the return spring 15 from bending when it is compressed. When the extrusion block 5 contacts the outward push block 3, it will drive the other push plate 7 to move. The other push plate 7 will also squeeze the limit rod 14. When the other push plate 7 drives the fixing plate 8 to protrude from the inside of the positioning box 2, the positioning box 2 can be inserted into the inside of the diesel engine plunger assembly.

[0033] Then rotate nut 17 to press the compression plate 16 and move the opening and closing rod 9, which will allow the positioning box 2 to expand and ensure that the fixing plate 8 can fix diesel engine plunger pairs with different inner diameters.

[0034] It should be noted that this device uses a telescopic screw 6 to control the movement of the extrusion block 5, allowing the extrusion block 5 to extrude outward or inward towards the pushing block 3 or the pushing block 4, thereby controlling different pushing plates 7 to drive the fixing plate 8 to protrude from inside the positioning box 2, thus fixing the fixing plate 8 inside or outside the diesel engine plunger assembly. This solves the problem of low work efficiency caused by the need to select corresponding clamps when fixing the diesel engine plunger assembly inside or outside, and improves the work efficiency when polishing the diesel engine plunger assembly.

[0035] Example 2

[0036] like Figure 1 and 2 As shown, based on Embodiment 1, an auxiliary spring 11 is fixedly connected to the outside of the positioning box 2. A positioning block 12 is fixedly connected to the end of the auxiliary spring 11 away from the positioning box 2. The positioning block 12 is fixedly connected to one side of the support plate 1. A telescopic rod 13 is fixedly connected between the positioning box 2 and the positioning block 12. The telescopic rod 13 is located inside the auxiliary spring 11.

[0037] In this embodiment, when the positioning box 2 opens, the auxiliary spring 11 and the telescopic rod 13 will push the positioning box 2 on one side of the positioning block 12, and the auxiliary opening and closing rod 9 controls the positioning box 2 to open. The telescopic rod 13 can also prevent the auxiliary spring 11 from bending unnecessarily when it extends or retracts.

[0038] It should also be noted that this device uses an auxiliary spring 11 and a telescopic rod 13 to avoid the problem of angle deviation when the opening and closing rod 9 opens the positioning box 2, thereby improving the stability of the opening and closing rod 9 in controlling the positioning box 2.

[0039] The above specific embodiments are merely several optional embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A positioning fixture for polishing diesel engine plunger assemblies, comprising a support plate (1), characterized in that: A positioning box (2) is slidably connected to one side of the support plate (1). There are three positioning boxes (2) arranged in a circular array on one side of the support plate (1). A push plate (7) is slidably connected inside the positioning box (2). There are two sets of push plates (7) arranged symmetrically. A fixing piece (8) is fixedly connected to the push plate (7) away from the opposite side. There are multiple sets of fixing pieces (8) arranged in a linear array. One set of push plates (7) is fixedly connected to an outward pushing block (3) on the opposite side. The other set of push plates (7) is fixedly connected to an inward pushing block (4) on the opposite side away from the outward pushing block (3). A squeezing block (5) is provided between the outward pushing block (3) and the inward pushing block (4). A control component is provided on one side of the squeezing block (5).

2. The positioning fixture for polishing diesel engine plunger assemblies according to claim 1, characterized in that, The control component includes a telescopic screw (6), one end of which is rotatably connected to one side of the extrusion block (5), and the telescopic screw (6) is rotatably connected to the inside of the positioning box (2) at a position away from the extrusion block (5). The outward expansion push block (3) and the inward retraction push block (4) are arranged in a trapezoidal shape.

3. The positioning fixture for polishing diesel engine plunger assemblies according to claim 1, characterized in that, The push plate (7) is internally connected to a limiting rod (14), and there are four sets of limiting rods (14) arranged in a rectangular array. The limiting rods (14) are fixedly connected inside the positioning box (2). The push plate (7) is fixedly connected to a return spring (15) on the opposite side away from the limit rods (14). The return spring (15) is located outside the limiting rods (14).

4. The positioning fixture for polishing diesel engine plunger assemblies according to claim 1, characterized in that, The positioning box (2) is rotatably connected to an opening and closing rod (9) at a position away from the telescopic screw (6). The support plate (1) is provided with a sliding groove (10) near the opening and closing rod (9). The opening and closing rod (9) is slidably connected to the inside of the sliding groove (10).

5. The positioning fixture for polishing diesel engine plunger assemblies according to claim 4, characterized in that, The opening and closing rod (9) is rotatably connected to a pressing plate (16) at the end away from the positioning box (2), and the pressing plate (16) is equipped with a control component.

6. The positioning fixture for polishing diesel engine plunger assemblies according to claim 5, characterized in that, The control assembly includes a rotating screw (18) which is slidably connected inside the extrusion plate (16), and a nut (17) is rotatably connected to the outside of the rotating screw (18).

7. The positioning fixture for polishing diesel engine plunger assemblies according to claim 6, characterized in that, The nut (17) abuts against the side of the extrusion plate (16) away from the connecting rod (9), and one end of the rotating screw (18) is rotatably connected to the side of the support plate (1) away from the positioning box (2).

8. The positioning fixture for polishing diesel engine plunger assemblies according to claim 1, characterized in that, An auxiliary spring (11) is fixedly connected to the outside of the positioning box (2). A positioning block (12) is fixedly connected to the end of the auxiliary spring (11) away from the positioning box (2). The positioning block (12) is fixedly connected to one side of the support plate (1). A telescopic rod (13) is fixedly connected between the positioning box (2) and the positioning block (12). The telescopic rod (13) is located inside the auxiliary spring (11).

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