CN216398015U - Crank throw eccentric hole car adds clamping apparatus - Google Patents
Crank throw eccentric hole car adds clamping apparatus Download PDFInfo
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- CN216398015U CN216398015U CN202123248115.7U CN202123248115U CN216398015U CN 216398015 U CN216398015 U CN 216398015U CN 202123248115 U CN202123248115 U CN 202123248115U CN 216398015 U CN216398015 U CN 216398015U
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Abstract
In order to solve the problems of long processing time, unstable processing quality, serious production waste and the like existing in the crank throw eccentric hole turning method in the prior art, the utility model provides a crank throw eccentric hole turning clamp which comprises a bottom plate, a base, an elastic collet chuck, a balance block, a guide plate, a balance bolt, a taper pin guide cylinder and a taper pin; the base plate is fixedly connected to a lathe rotating disc, the base plate is fixedly arranged on the base plate, the seat plate is fixed on the base plate, and the base is fixed in the middle of the seat plate; the elastic collet chuck is arranged in the middle of the base and comprises an elastic collet, a sleeve and a driving cylinder; the taper pin guide cylinder is fixedly arranged on the opposite surface of the base, and the axis of the taper pin guide cylinder is overlapped with the rotation axis of the bottom plate. The utility model has the beneficial technical effects of simple structure, convenient installation and use and capability of ensuring the turning quality.
Description
Technical Field
The utility model relates to a crank throw eccentric hole turning technology, in particular to a crank throw eccentric hole turning clamp.
Background
The crank is the main component of engine transmission torque, wherein the most important dimension is the eccentricity of the crank throw eccentric hole, and the manufacturing accuracy thereof directly influences the performance of the engine (see figure 1, wherein A is the crank throw eccentric hole). In order to ensure the turning precision of the crank throw eccentric hole, the prior art mostly adopts the traditional multi-procedure and multi-machine-tool mode, and the machine tool clamp for processing still adopts the manual adjustment mode. The processing time is long, the processing size is unstable, and the processing quality and the processing efficiency are greatly influenced. Meanwhile, the number of unqualified parts is large, and the production waste is serious.
Obviously, the crank throw eccentric hole turning method in the prior art has the problems of long processing time, unstable processing quality, serious production waste and the like.
Disclosure of Invention
The utility model provides a crank throw eccentric hole turning clamp, aiming at solving the problems of long processing time, unstable processing quality, serious production waste and the like existing in a crank throw eccentric hole turning method in the prior art.
The utility model discloses a turning clamp for crank throw eccentric holes, which comprises a bottom plate, a base plate, a seat plate, a base, an elastic collet chuck, a balance block, a guide plate, a balance bolt, a taper pin guide cylinder and a taper pin, wherein the base plate is arranged on the bottom plate; the bottom plate is a disc-shaped plate and is fixedly connected to a turning disc of the lathe; the base plate is also a disc-shaped plate, the diameter of the base plate is smaller than that of the bottom plate, and the base plate is fixedly arranged on the bottom plate; the seat plate is a rectangular plate and is fixed on the base plate through bolts; the base is a hollow cylinder and is fixed in the middle of the seat plate; in addition, a positioning step for placing a crank is arranged on the upper surface of the base; the elastic collet chuck is arranged in the middle of the base and comprises an elastic collet, a sleeve and a driving cylinder; the elastic clamp is cylindrical, the inner diameter of the elastic clamp is matched with the diameter of the root part of the crank curved rod, a gap for contracting the opening of the cylinder is arranged at the clamping end of the elastic clamp, and a conical surface with the diameter gradually increasing is arranged from the bottom to the clamping end of the excircle of the elastic clamp; the sleeve is sleeved outside the elastic clamp, and the inner diameter of the sleeve is 0.1-0.8 mm smaller than the maximum diameter of the elastic clamp; the driving cylinder is arranged at the bottom of the sleeve, and the driving sleeve moves back and forth relative to the elastic clamp; the balance block is a rectangular cube and is fixed on one side of the base, which is deviated to the rotating axis of the bottom plate; the two guide plates are respectively arranged on two sides of the seat plate; the balance bolts are uniformly arranged on one side of the edge of the circular bottom plate opposite to the balance block, and balance weights are also arranged on the balance bolts; the taper pin guide cylinder is fixedly arranged on the opposite surface of the base, and the axis of the taper pin guide cylinder is superposed with the rotation axis of the bottom plate; the front end of the taper pin is provided with a conical surface and is sleeved in the taper pin guide cylinder in a sliding manner.
Further, the bolt hole on the seat plate is an oval through hole.
The crank throw eccentric hole turning clamp has the beneficial technical effects of simple structure, convenience in installation and use and capability of ensuring the turning quality.
Drawings
FIG. 1 is a schematic structural view of a crank;
FIG. 2 is a schematic structural view of a crank throw eccentric hole turning fixture according to the present invention;
FIG. 3 is a schematic structural view of an elastic collet chuck of the crank throw eccentric hole turning clamp of the utility model;
FIG. 4 is a schematic view of the crank clamping device for turning eccentric holes of crank throw according to the present invention.
The crank throw eccentric hole turning clamp of the utility model is further explained by combining the attached drawings and the detailed embodiment.
Detailed Description
FIG. 2 is a schematic structural diagram of the crank throw eccentric hole turning clamp, FIG. 3 is a schematic structural diagram of an elastic collet chuck of the crank throw eccentric hole turning clamp, and FIG. 4 is a schematic structural diagram of a crank throw eccentric hole turning clamp; in the figure, 1 is a bottom plate, 2 is a base plate, 3 is a seat plate, 4 is a base, 5 is an elastic collet chuck, 5-1 is an elastic clamp, 5-2 is a sleeve, 6 is a balance block, 7 is a guide plate, 8 is a balance bolt, 9 is a taper pin guide cylinder, 10 is a taper pin, and A is a crank. As can be seen from the figure, the crank throw eccentric hole turning clamp comprises a bottom plate 1, a base plate 2, a seat plate 3, a base 4, an elastic collet chuck 5, a balance block 6, a guide plate 7, a balance bolt 8, a taper pin guide cylinder 9 and a taper pin 10; the bottom 1 is a disc-shaped plate and is fixedly connected to a lathe rotating disc; the substrate 2 is also a disc-shaped plate, the diameter of the disc-shaped plate is smaller than that of the bottom plate, and the disc-shaped plate is fixedly arranged on the bottom plate; the seat plate 3 is a rectangular plate and is fixed on the base plate through bolts; the base 4 is a hollow cylinder and is fixed in the middle of the seat plate; in addition, a positioning step for placing a crank is arranged on the upper surface of the base; the elastic collet chuck 5 is arranged in the middle of the base and comprises an elastic clamp 5-1, a sleeve 5-2 and a driving cylinder (not shown in the figure); the elastic clamp 5-1 is cylindrical, the inner diameter of the elastic clamp is matched with the diameter of the root part of the crank curved rod, a gap for contracting the opening of the cylinder is arranged at the clamping end of the elastic clamp, and a conical surface with the diameter gradually increasing is arranged from the bottom to the clamping end of the excircle of the elastic clamp; the sleeve 5-2 is sleeved outside the elastic clamp, and the inner diameter of the sleeve is 0.1-0.8 mm smaller than the maximum diameter of the elastic clamp; the driving cylinder is arranged at the bottom of the sleeve, and the driving sleeve moves back and forth relative to the elastic clamp; the balance weight 6 is a rectangular cube and is fixed on one side of the base, which is deviated to the rotating axis of the bottom plate; the two guide plates 7 are respectively arranged on two sides of the seat plate; the balance bolts 8 are uniformly arranged on one side of the edge of the circular bottom plate opposite to the balance block, and balance weights are also arranged on the balance bolts; the taper pin guide cylinder 9 is fixedly arranged on the opposite surface of the base, and the axis of the taper pin guide cylinder is coincided with the rotation axis of the bottom plate; the front end of the taper pin 10 is provided with a taper surface and is sleeved in the taper pin guide cylinder in a sliding manner. When the crank throw eccentric hole turning clamp is used for machining crank throw eccentric holes, the crank throw eccentric hole turning clamp is fixedly arranged on a lathe turntable through a bottom plate, and the whole machining clamp and a clamped crank are adjusted to be in dynamic balance through a balance block and a balance bolt. When processing, the crank rod of the crank to be processed is inserted into the round hole of the elastic clamp, and the inner diameter of the elastic clamp is matched with the diameter of the root of the crank rod, so that the crank cannot shake greatly after being inserted. And pulling out the pin shaft from the taper pin guide cylinder and inserting the pin shaft into the eccentric hole of the crank throw. Because the axis of the pin shaft guide cylinder coincides with the rotating axis of the bottom plate, the axis of the crank throw eccentric hole coincides with the rotating axis of the bottom plate, and the axis of the crank throw eccentric hole becomes a turning axis, so that the processing quality is effectively ensured. The driving cylinder of the elastic collet chuck is started, the driving cylinder drives the clamping end of the sleeve to move relative to the elastic clamp, and the inner diameter of the sleeve is smaller than the maximum diameter of the elastic clamp, and the clamping end of the elastic clamp is also provided with a gap for contracting the cylinder opening, so that the clamping end of the elastic clamp can completely clamp the crank. Because the driving cylinder is opened under the condition that the pin shaft is inserted into the eccentric hole, the elastic collet chuck holds the crank and simultaneously keeps the positioning precision of the eccentric hole. Moreover, because the front end of the pin shaft is provided with the conical surface, the pin shaft can be accurately positioned by inserting the eccentric hole no matter whether the crank throw eccentric hole on the crank blank is regular or not.
In order to meet the turning of crank throw eccentric holes of different models, the bolt holes in the seat plate are oval through holes. When the eccentric moment of the eccentric hole needs to be adjusted, the fastening bolt is loosened, the seat plate is pushed along the oval through hole, and the eccentric moment of the eccentric hole can be adjusted.
Obviously, the crank throw eccentric hole turning clamp has the beneficial technical effects of simple structure, convenience in installation and use and capability of ensuring the turning quality.
Claims (2)
1. A crank throw eccentric hole turning clamp is characterized by comprising a bottom plate, a base plate, a seat plate, a base, an elastic collet chuck, a balance block, a guide plate, a balance bolt, a taper pin guide cylinder and a taper pin; the bottom plate is a disc-shaped plate and is fixedly connected to a turning disc of the lathe; the base plate is also a disc-shaped plate, the diameter of the base plate is smaller than that of the bottom plate, and the base plate is fixedly arranged on the bottom plate; the seat plate is a rectangular plate and is fixed on the base plate through bolts; the base is a hollow cylinder and is fixed in the middle of the seat plate; in addition, a positioning step for placing a crank is arranged on the upper surface of the base; the elastic collet chuck is arranged in the middle of the base and comprises an elastic collet, a sleeve and a driving cylinder; the elastic clamp is cylindrical, the inner diameter of the elastic clamp is matched with the diameter of the root part of the crank curved rod, a gap for contracting the opening of the cylinder is arranged at the clamping end of the elastic clamp, and a conical surface with the diameter gradually increasing is arranged from the bottom to the clamping end of the excircle of the elastic clamp; the sleeve is sleeved outside the elastic clamp, and the inner diameter of the sleeve is 0.1-0.8 mm smaller than the maximum diameter of the elastic clamp; the driving cylinder is arranged at the bottom of the sleeve, and the driving sleeve moves back and forth relative to the elastic clamp; the balance block is a rectangular cube and is fixed on one side of the base, which is deviated to the rotating axis of the bottom plate; the two guide plates are respectively arranged on two sides of the seat plate; the balance bolts are uniformly arranged on one side of the edge of the circular bottom plate opposite to the balance block, and balance weights are also arranged on the balance bolts; the taper pin guide cylinder is fixedly arranged on the opposite surface of the base, and the axis of the taper pin guide cylinder is superposed with the rotation axis of the bottom plate; the front end of the taper pin is provided with a conical surface and is sleeved in the taper pin guide cylinder in a sliding manner.
2. The crank throw eccentric hole turning fixture according to claim 1, wherein the bolt holes on the seat plate are oval through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123248115.7U CN216398015U (en) | 2021-12-22 | 2021-12-22 | Crank throw eccentric hole car adds clamping apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123248115.7U CN216398015U (en) | 2021-12-22 | 2021-12-22 | Crank throw eccentric hole car adds clamping apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216398015U true CN216398015U (en) | 2022-04-29 |
Family
ID=81284968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123248115.7U Active CN216398015U (en) | 2021-12-22 | 2021-12-22 | Crank throw eccentric hole car adds clamping apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216398015U (en) |
-
2021
- 2021-12-22 CN CN202123248115.7U patent/CN216398015U/en active Active
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