CN217619884U - Surface processing and positioning device for piston pin of internal combustion engine - Google Patents
Surface processing and positioning device for piston pin of internal combustion engine Download PDFInfo
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- CN217619884U CN217619884U CN202221562940.6U CN202221562940U CN217619884U CN 217619884 U CN217619884 U CN 217619884U CN 202221562940 U CN202221562940 U CN 202221562940U CN 217619884 U CN217619884 U CN 217619884U
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Abstract
The utility model discloses a surface processing and positioning device of a piston pin of an internal combustion engine, which comprises a positioning mandrel (3) and a positioning component; the upper part of the positioning mandrel (3) is circumferentially limited and clamped in a main shaft hole of a machine tool main shaft (2), and the lower part of the positioning mandrel is detachably connected with a hollow hole of a piston pin (1); the positioning component comprises a spring (55), a first supporting plate (51) and a second supporting plate (52) which are positioned at two sides of the machine tool spindle (2) and are horizontally linked; the first screw (53) is arranged in the middle of the first supporting plate (51) and penetrates through the machine tool spindle (2) to be pressed in the positioning groove (32); one end of the spring (55) is in contact with the second support plate (52), and the other end of the spring is in contact with the machine tool spindle (2) and is in a compressed state. The surface processing and positioning device for the piston pin of the internal combustion engine has a simple and compact structure, not only realizes circumferential and axial positioning between the piston pin and a machine tool spindle, but also facilitates the stability of surface processing of the piston pin, realizes quick assembly and disassembly, and is more convenient.
Description
Technical Field
The utility model relates to an internal-combustion engine processing technology field, concretely relates to internal-combustion engine piston pin's surface machining positioner.
Background
The piston pin 1 is an important part for connecting the piston and the connecting rod of the internal combustion engine, and has the function of transmitting gas acting force borne by the piston to the connecting rod or enabling the small end of the connecting rod to drive the piston to move together.
The piston pin 1 is a hollow cylindrical structure, and bears a large periodic impact load under a high-temperature condition, and a lubricating oil film is difficult to form due to the fact that the piston pin 1 does not swing in the pin hole in a large angle, and therefore the lubricating condition is poor. For this purpose, the piston pin 1 must have sufficient rigidity, strength and wear resistance, while at the same time having a high fatigue strength. The pin and the pin bore should have a suitable fit clearance and a good surface quality, so that the surface roughness of the piston pin 1 is very demanding, for example up to the 11 th order, i.e. ra0.08 μm.
The traditional processing and positioning method is that a piston pin 1 is positioned on a grinding machine, grinding paste is configured for grinding, and the processing quantity of each disk is 8; when processing location to piston pin 1, need fix piston pin 1, for guaranteeing 1 both ends grinding uniformity of piston pin, need the manual work to the spare part turn round in the grinding process and put many times, it is efficient intensity of labour big to inconvenient people operate.
Disclosure of Invention
An object of the utility model is to provide a surface machining positioner of internal-combustion engine piston pin, simple structure is compact, not only realizes circumference, the axial positioning relative with the lathe main shaft to the piston pin, makes things convenient for piston pin surface machining's stability, realizes its quick assembly disassembly moreover, low in labor strength, efficient.
In order to achieve the purpose, the surface processing and positioning device of the piston pin of the internal combustion engine comprises a positioning mandrel and a positioning assembly;
the upper part of the positioning mandrel is circumferentially limited and clamped in a main shaft hole of a machine tool main shaft, and the lower part of the positioning mandrel is detachably connected with a piston pin hollow hole;
the positioning component comprises a spring, a first supporting plate and a second supporting plate which are positioned on two sides of the machine tool spindle and are horizontally linked;
the first screw is arranged in the middle of the first supporting plate and penetrates through the spindle of the machine tool to be pressed in the positioning groove on the positioning spindle;
one end of the spring is in contact with the second supporting plate, and the other end of the spring is in contact with the machine tool spindle and is in a pressed state.
Further, arc-shaped grooves which are horizontally arranged are symmetrically arranged on the main shaft of the machine tool;
the positioning assembly further comprises a pair of second screws; the pair of second screw rods are symmetrically arranged on two sides of the first supporting plate, one end of each second screw rod is fixed with the first supporting plate, and the other end of each second screw rod penetrates through the arc-shaped groove and the second supporting plate in sequence and then is locked and fixed through a second nut;
the spring is sleeved on the second screw rod.
Further, the positioning mandrel is of a multi-step cylindrical structure with diameters decreasing from top to bottom;
the upper end of the piston pin is pressed against the shaft shoulder of the positioning mandrel and is locked and fixed by a first nut which is arranged on the positioning mandrel through threads.
Furthermore, the positioning mandrel is of a four-stage step cylindrical structure, the first step on the uppermost layer is connected with a machine tool spindle, a piston pin is mounted on the third step, and the fourth step is of a threaded structure.
Furthermore, positioning pins are radially arranged on two sides of the upper part of the positioning mandrel;
the lower end of the machine tool spindle is provided with a U-shaped groove matched with the positioning pin; the locating pin is embedded in the U-shaped groove in a sliding mode.
Further, the first screw is installed in the middle of the first supporting plate in a threaded manner.
Furthermore, a clamping groove with a rectangular structure is arranged in the middle of the positioning mandrel.
Compared with the prior art, the surface processing and positioning device for the piston pin of the internal combustion engine has the advantages that the circumferential limiting at the upper part of the positioning mandrel is clamped in the main shaft hole of the machine tool main shaft, and the lower part of the positioning mandrel is detachably connected with the hollow hole of the piston pin, so that the relative circumferential limiting between the piston pin and the machine tool main body is realized;
the positioning mandrel is lifted up and down to complete the disassembly and assembly in the circumferential direction between the piston pin and the machine tool spindle, the second supporting plate is pushed to compress the spring, and the first supporting plate is correspondingly horizontally linked, so that one end of the first screw rod is separated from the positioning groove to complete the relative axial disassembly of the piston pin relative to the machine tool spindle, the quick disassembly and assembly of the positioning mandrel are realized, and the labor intensity is reduced;
because first screw rod screw thread is installed on first backup pad, when first screw rod roof pressure was in positioning groove, rotated first screw rod and carried out axial displacement, can drive first backup pad and carry out the adjustment of spring force, the guarantee is spacing to the positioning core axle.
Drawings
Fig. 1 is an overall front view of the present invention;
fig. 2 is an overall left side view of the present invention;
fig. 3 is a left side view of the middle positioning mandrel of the present invention;
fig. 4 is a left side view of the middle positioning mandrel and the machine tool spindle of the present invention;
in the figure: 1. piston pin, 2, machine tool spindle, 21, arc-shaped groove, 3, positioning mandrel, 31, positioning pin, 32, positioning groove, 33, clamping groove, 4, first nut, 51, first supporting plate, 52, second supporting plate, 53, first screw rod, 54, second screw rod, 55, spring, 56 and second nut.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in figures 1 to 4, the surface processing positioning device for the piston pin of the internal combustion engine comprises a positioning mandrel 3 and a positioning assembly;
the upper part of the positioning mandrel 3 is circumferentially limited and clamped in a main shaft hole of a machine tool main shaft 2, and the lower part of the positioning mandrel is detachably connected with a hollow hole of a piston pin 1;
the positioning component comprises a spring 55, a first supporting plate 51 and a second supporting plate 52 which are positioned at two sides of the machine tool spindle 2 and are horizontally linked;
the first screw 53 is arranged in the middle of the first supporting plate 51, penetrates through the machine tool spindle 2 and is pressed in the positioning groove 32 on the positioning mandrel 3;
the spring 55 has one end in contact with the second support plate 52 and the other end in contact with the machine spindle 2 and is in a compressed state.
Specifically, when the surface of the piston pin 1 is machined, the piston pin 1 is arranged at the lower part of the positioning mandrel 3, and the positioning mandrel 3 is moved upwards, so that the upper part of the piston pin is circumferentially limited and clamped in a main shaft hole of a machine tool main shaft 2;
under the action of the elastic force of the spring 55, the second support plate 52 and the first support plate 51 are stressed towards one side of the second support plate 52, and at the moment, the first screw 53 on the first support plate 51 penetrates through a machine tool to be pressed in the positioning groove 32 on the positioning mandrel 3, so that the axial limit of the positioning mandrel 3 is realized;
after the positioning of the positioning mandrel 3 is finished, a piston pin 1 at the lower part of the positioning mandrel is driven to carry out surface processing treatment by the rotation of a machine tool spindle 2;
when dismantling, promote second backup pad 52 and compress spring 55, because first backup pad 51, second backup pad 52 horizontal interlock, consequently first backup pad 51 moves to one side for first screw 53 end breaks away from positioning groove 32, and positioning core axle 3 moves down again, realizes dismantling it fast.
In order to ensure mutual linkage between the first support plate 51 and the second support plate 52, illustratively, the machine tool spindle 2 is symmetrically provided with arc-shaped grooves 21 which are horizontally arranged;
the positioning assembly further includes a pair of second screws 54; a pair of second screws 54 are symmetrically arranged on two sides of the first support plate 51, one end of each second screw 54 is fixed with the first support plate 51, and the other end of each second screw 54 sequentially penetrates through the arc-shaped groove 21 and the second support plate 52 and then is locked and fixed through a second nut 56;
the spring 55 is sleeved on the second screw 54;
specifically, the first support plate 51 and the second support plate 52 are linked by the second screw 54, that is, the second screw 54 may be a stepped shaft, and one end close to the second support plate 52 is a threaded structure; the shaft body of the second screw 54 is positioned in the arc-shaped groove 21 for limiting, namely the positioning component is positioned on the positioning mandrel 3 while the horizontal movement of the first support plate 51 and the second support plate 52 is not influenced;
in addition, the second screw 54 may also be a guide rod fixedly connected to the first support plate 51 and the second support plate 52;
illustratively, the positioning mandrel 3 is a multi-step cylindrical structure with the diameters decreasing from top to bottom;
the upper end of the piston pin 1 is pressed against the shaft shoulder of the positioning mandrel 3 and is locked and fixed by a first nut 4 which is arranged on the positioning mandrel 3 through threads;
specifically, preferably, the positioning mandrel 3 is of a four-step cylindrical structure, the first step at the uppermost layer is connected with the machine tool spindle 2, the piston pin 1 is mounted on the third step, and the fourth step is of a threaded structure;
the first nut 4 is installed on the fourth step in a threaded mode to position and lock the piston pin 1;
exemplarily, positioning pins 31 are radially arranged on two sides of the upper part of the positioning mandrel 3;
the lower end of the machine tool spindle 2 is provided with a U-shaped groove matched with the positioning pin 31; the positioning pin 31 is embedded in the U-shaped groove in a sliding manner;
specifically, the positioning mandrel 3 is moved upwards, and the positioning pin 31 on the positioning mandrel 3 is matched with the U-shaped groove on the machine tool spindle 2 to limit the machine tool spindle;
in addition, in order to ensure that the upper part of the positioning mandrel 3 is circumferentially limited and clamped in a main shaft hole of the machine tool main shaft 2, the positioning mandrel 3 and the machine tool main shaft 2 can also adopt a flat key mode, namely, a key groove is arranged on the positioning mandrel 3, a flat key is arranged on the inner wall of the machine tool main shaft 2, and when the positioning mandrel 3 moves up and down, the flat key and the key groove are matched and clamped with each other;
further, a first screw 53 is threadedly mounted in the middle of the first support plate 51;
the first screw 53 is installed on the first support plate 51 in a threaded manner, and when the first screw 53 is pressed against the positioning groove, the first screw 53 is rotated to move axially, so that the first support plate 51 can be driven to adjust the elasticity of the spring 55, and the positioning mandrel 3 is guaranteed to be limited;
further, a clamping groove 33 with a rectangular structure is arranged in the middle of the positioning mandrel 3;
namely, when the positioning mandrel 3 passes through the piston pin 1 for locking and fastening, the tightening tool can be clamped and positioned in the clamping groove 33, so that the first nut 4 can be conveniently screwed and fastened at regular time, and the tightening tool applies reverse force.
When the surface processing and positioning device for the piston pin of the internal combustion engine is used, the piston pin 1 is arranged at the lower part of the positioning mandrel 3, the positioning mandrel 3 is moved upwards, and the circumferential limiting block at the upper part of the positioning mandrel is clamped in a main shaft hole of a machine tool main shaft 2; under the action of the elastic force of the spring 55, the second support plate 52 and the first support plate 51 are stressed towards one side of the second support plate 52, and at the moment, the first screw 53 penetrates through the machine tool to be pressed in the positioning groove 32 on the positioning mandrel 3, so that the axial limiting of the positioning mandrel 3 is realized, namely the relative axial limiting of the piston pin 1 and the machine tool spindle 2 is realized; after the positioning of the positioning mandrel 3 is finished, the machine tool spindle 2 rotates to drive the piston pin 1 at the lower part of the positioning mandrel 3 to carry out surface processing treatment;
specifically, a pair of second screws 54 is fixed by a second nut 56 after passing through the first support plate 51, the corresponding arc-shaped groove 21 on the machine tool main body, the spring 55 and the second support plate 52, so that the first support plate 51 and the second support plate 52 are axially limited and horizontally linked on the machine tool spindle 2;
the piston pin 1 is fixedly installed at the lower part of the positioning mandrel 3, the positioning pin 31 on the positioning mandrel 3 is aligned with the U-shaped groove on the machine tool spindle 2, and the positioning mandrel 3 is pushed into the spindle hole at the lower end of the machine tool spindle 2 upwards with force, so that the first screw 53 is just clamped in the positioning groove 32 of the positioning mandrel 3 under the action of the spring 55, and the positioning of the positioning spool in the circumferential and axial directions is realized, namely the relative circumferential and axial positioning of the piston pin 1 and the machine tool spindle 2 is realized;
preferably, the positioning groove 32 is located at the middle position of the connecting line of the pair of positioning pins 31;
starting a machine tool spindle 2 to drive a piston pin 1 to perform surface machining; after the processing is finished, the second support plate 52 is pushed by hand to compress the spring 55, at the moment, the first support plate 51 is correspondingly and horizontally linked, one end of the first screw 53 on the first support plate is separated from the positioning groove 32, and the positioning mandrel 3 is moved downwards, so that the positioning mandrel 3 is quickly disassembled and assembled;
for distinguishing tradition to the surface machining of piston pin 1, this device is fixed the back to location dabber 3, with piston pin 1 dip into in the abrasive material case, through the automatic abrasive material that stirs of equipment, under the lubricated effect of grinding fluid, make the even surface of contact piston pin 1 of grit, lathe main shaft 2 drives piston pin 1 rotation simultaneously, make piston pin 1 take place circumferencial direction relative motion with the abrasive material in the abrasive material case, make piston pin 1 surface by abrasive material microcosmic finishing grinding, effectively improve the purpose of piston pin 1 roughness.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
Claims (7)
1. The surface processing and positioning device of the internal combustion engine piston pin is characterized by comprising a positioning mandrel (3) and a positioning assembly; the upper part of the positioning mandrel (3) is circumferentially limited and clamped in a main shaft hole of a machine tool main shaft (2), and the lower part of the positioning mandrel is detachably connected with a hollow hole of a piston pin (1);
the positioning component comprises a spring (55), a first supporting plate (51) and a second supporting plate (52), wherein the first supporting plate and the second supporting plate are positioned on two sides of the machine tool spindle (2) and are horizontally linked;
the first screw (53) is arranged in the middle of the first supporting plate (51) and penetrates through the machine tool spindle (2) to be pressed in the positioning groove (32) on the positioning mandrel (3);
one end of the spring (55) is in contact with the second support plate (52), and the other end of the spring is in contact with the machine tool spindle (2) and is in a compressed state.
2. The internal combustion engine gudgeon pin surfacing positioning device according to claim 1, characterized in that the machine tool spindle (2) is symmetrically provided with horizontally arranged arc-shaped slots (21);
the positioning assembly further comprises a pair of second threaded rods (54); the pair of second screw rods (54) are symmetrically arranged on two sides of the first supporting plate (51), one end of each second screw rod (54) is fixed with the first supporting plate (51), and the other end of each second screw rod (54) sequentially penetrates through the arc-shaped groove (21) and the second supporting plate (52) and then is locked and fixed through a second nut (56);
the spring (55) is sleeved on the second screw rod (54).
3. The internal combustion engine piston pin surface machining positioning device according to claim 2, characterized in that the positioning mandrel (3) is a multi-step cylindrical structure with diameters decreasing from top to bottom;
the upper end of the piston pin (1) is pressed against the shaft shoulder of the positioning core shaft (3) and is locked and fixed by a first nut (4) which is arranged on the positioning core shaft (3) through threads.
4. The internal combustion engine piston pin surface machining positioning device according to the claim 3 is characterized in that the positioning mandrel (3) is of a four-step cylindrical structure, the first step at the uppermost layer is connected with a machine tool main shaft (2), the piston pin (1) is arranged on the third step, and the fourth step is of a threaded structure.
5. The internal combustion engine piston pin surface machining positioning device according to any one of claims 1 to 4, characterized in that the upper part of the positioning mandrel (3) is provided with positioning pins (31) on both sides in the radial direction;
the lower end of the machine tool spindle (2) is provided with a U-shaped groove matched with the positioning pin (31); the positioning pin (31) is embedded in the U-shaped groove in a sliding manner.
6. A positioning device for the surface finishing of internal combustion engine gudgeon pins according to claim 5, characterized in that the first screw (53) is mounted threaded in the middle of the first supporting plate (51).
7. A positioning device for the surface machining of internal combustion engine piston pins according to claim 5, characterized in that the middle of the positioning mandrel (3) is provided with a clamping groove (33) of rectangular configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221562940.6U CN217619884U (en) | 2022-06-22 | 2022-06-22 | Surface processing and positioning device for piston pin of internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221562940.6U CN217619884U (en) | 2022-06-22 | 2022-06-22 | Surface processing and positioning device for piston pin of internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217619884U true CN217619884U (en) | 2022-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221562940.6U Active CN217619884U (en) | 2022-06-22 | 2022-06-22 | Surface processing and positioning device for piston pin of internal combustion engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217619884U (en) |
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2022
- 2022-06-22 CN CN202221562940.6U patent/CN217619884U/en active Active
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