CN209811817U - Sliding type copying shifting block tool for piston - Google Patents
Sliding type copying shifting block tool for piston Download PDFInfo
- Publication number
- CN209811817U CN209811817U CN201920603213.1U CN201920603213U CN209811817U CN 209811817 U CN209811817 U CN 209811817U CN 201920603213 U CN201920603213 U CN 201920603213U CN 209811817 U CN209811817 U CN 209811817U
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- shifting block
- piston
- boss
- connecting bolt
- hole
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Abstract
A sliding type profiling shifting block tool for a piston relates to the technical field of piston processing and comprises a base, a sliding shifting block and a connecting bolt, wherein a boss is longitudinally arranged in the middle of the base, a screw hole is formed in the middle of the boss, a clamping groove is formed in the bottom end of the sliding shifting block and can be clamped on the boss in a sliding mode, a groove is formed in the top end of the sliding shifting block, a through hole penetrating downwards to the upper end of the boss is formed in the bottom end of the groove, the bottom end of the head of the connecting bolt is pressed at an opening at the upper end of the through hole, the bottom of the connecting bolt is meshed in the screw hole in the middle of the boss, the diameter of the through hole is larger than that of a connecting bolt and smaller than that of the connecting bolt head of the connecting bolt, the sliding type shifting block tool for the piston can be inserted into a piston pin hole seat under the condition that a, realize automatic alignment, make pinhole seat atress even.
Description
The technical field is as follows:
the utility model relates to a piston processing technology field especially relates to a slidingtype profile modeling shifting block frock for piston.
Background art:
the piston is a key part in an engine, the piston skirt part which performs reciprocating motion under the condition of high temperature and high pressure load and plays a guiding role is often designed into a complex curved surface (a shape line and an ellipse) shape, the shape line and the ellipse precision of the piston skirt part determine the using effect and the service life of the piston, the skirt part shape line and the ellipse machining of the piston need a precise NC lathe, the machining process is commonly called a profiling process, the profiling process is also a key process in the piston machining production process, a fixed shifting block tool is adopted for many years, the fixed shifting block tool has the advantages of easy manufacture and low cost, and has the defects that a certain wall thickness error exists in the casting process of a piston pin hole seat, the two sides are not completely symmetrical, the lower end of the piston sleeved on the fixed shifting block tool cannot be embedded into a fixed seat below the shifting block tool sometimes, even if the piston can be installed, the fixed shifting block can stress the inside of a workpiece, the deviation of the processed shape line and ellipse size is large, and meanwhile, certain interference is generated when the piston is taken down from the shifting block, so that the production quality and efficiency are influenced.
The utility model has the following contents:
in order to solve the technical problem, the utility model provides a slidingtype profile modeling shifting block frock for piston can insert the piston pin hole seat under the condition that there is certain error in the piston pin hole seat in, and the terminal surface in the pinhole seat can be laminated to profile modeling in-process side end face realizes automatic alignment, makes pinhole seat atress even.
The utility model discloses a realize through following technical scheme:
the utility model provides a slidingtype profile modeling shifting block frock for piston, characterized by, includes base, slip shifting block and connecting bolt, the base middle part is along vertically being equipped with the boss, open at the boss middle part has the screw, open the shifting block bottom of sliding has the draw-in groove, card on the boss draw-in groove slidable, open on the slip shifting block top has the recess, open the recess bottom has the through-hole that link up to the boss upper end downwards, connecting bolt's head bottom presses at the upper end opening part of through-hole, connecting bolt's bottom meshing is in the screw at boss middle part, the diameter of through-hole is greater than the diameter of connecting bolt screw and is less than the diameter of connecting bolt head.
In another aspect of the present invention, the thickness of the sliding shifting block is smaller than the distance between two inner end surfaces of the pin hole seat of the piston to be processed.
In another aspect of the present invention, the boss cross section is rectangular.
In another aspect of the invention, the boss is clearance fit with the slot.
In another aspect of the present invention, the external thread of the screw rod of the connection bolt is disposed at the bottom of the rod body, the length of the external thread is equal to the depth of the hole of the screw hole in the middle of the boss, and the rod body part above the external thread is a polished rod.
In another aspect of the present invention, the height of the head of the connecting bolt is smaller than the depth of the groove at the top end of the sliding block.
In another aspect of the invention, the diameter of the through-hole is 1mm larger than the diameter of the connecting bolt screw.
The utility model has the advantages that: the sliding shifting block of the sliding type profiling shifting block tool for the piston can slide on the base in a small range, so that the sliding shifting block can be inserted into the piston pin hole seat under the condition that a certain error exists in the piston pin hole seat, one side end face of the sliding shifting block in the profiling process can be attached to the inner end face of the piston pin hole seat under the action of centrifugal force, automatic alignment is achieved, the stress of the pin hole seat is uniform, and the machining precision is improved.
Description of the drawings:
fig. 1 is a perspective view of the overall external structure of the embodiment of the present invention.
Fig. 2 is a schematic sectional view of an internal structure of an embodiment of the present invention.
Fig. 3 is a schematic view of a three-dimensional structure of a base in an embodiment of the present invention.
Fig. 4 is a schematic view of a three-dimensional structure of the sliding shifting block in the embodiment of the present invention.
Fig. 5 is a schematic view of a three-dimensional structure installed on a fixing base according to an embodiment of the present invention.
In the drawings: 1. connecting bolt, 2, recess, 3, slip shifting block, 4, base, 5, boss, 6, external screw thread, 7, polished rod, 8, screw, 9, draw-in groove, 10, fixing base, 11, the flange of fixing base.
The specific implementation mode is as follows:
the following will further explain the embodiments of the present invention with reference to the drawings and examples:
in the description of the present invention, it should be understood that the description indicating the orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element indicated must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the scope of the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a slidingtype profile modeling shifting block frock for piston, includes base 4, slip shifting block 3 and connecting bolt 1, 4 middle parts of base are along vertically being equipped with boss 5, boss 5 and base 4 structure as an organic whole, 5 cross sections of boss are the rectangle. Screw holes 8 are formed in the middle of the upper end of the boss 5, clamping grooves 9 are formed in the bottom end of the sliding shifting block 3, the clamping grooves 9 are clamped on the boss 5 in a sliding mode, grooves 2 are formed in the top end of the sliding shifting block 3, and the grooves 2 are used for containing the head of the connecting bolt 1. The bottom end of the groove 2 is provided with a through hole which penetrates downwards to the upper end of the boss 5, the bottom end of the head of the connecting bolt 1 is pressed at the opening at the upper end of the through hole, the bottom of the connecting bolt 1 is meshed in a screw hole 8 in the middle of the boss 5, and the diameter of the through hole is larger than that of the screw rod of the connecting bolt 1 and smaller than that of the head of the connecting bolt 1. The thickness of the sliding shifting block 3 is smaller than the distance between two inner end surfaces of the pin hole seat of the piston to be processed. The boss 5 is in clearance fit with the clamping groove 9. The external thread 6 of the screw rod of the connecting bolt 1 is arranged at the bottom of the rod body, the length of the external thread 6 is equal to the hole depth of a screw hole 8 in the middle of the boss 5, and the rod body part above the external thread is a polished rod 7. The height of the head of the connecting bolt 1 is smaller than the depth of the groove 2 at the top end of the sliding shifting block 3. The diameter of the through hole is 1mm larger than the diameter of the connecting bolt 1. The left end and the right end of the sliding shifting block 3 are in clearance fit with the inner cavity of the piston.
Since the diameter of the through hole is larger than the diameter of the screw of the connecting bolt 1 and smaller than the diameter of the head of the connecting bolt 1, the sliding shifting block 3 can slide on the base 4 along the boss 5 in the longitudinal direction to a small extent. Since the diameter of the through hole is 1mm larger than the diameter of the screw of the coupling bolt 1, the slide paddle 3 located at the intermediate position can slide forward and backward by 0.5mm, respectively.
When the tool is used, the base 4 of the sliding type copying shifting block tool for the piston is fixed on a fixed seat 10 on a lathe spindle, the piston to be subjected to copying processing is sleeved on the sliding shifting block 3, and the bottom end of the piston is embedded into a flange 11 of the fixed seat so as to perform a copying process. Because the sliding shifting block 3 can be adjusted in a small-range sliding mode on the base 4, even if a certain error exists in the piston pin hole seat (the piston pin hole seat has a certain wall thickness difference and two sides are not symmetrical completely), the piston sleeved on the sliding shifting block 3 can be embedded into the flange 11 of the fixed seat. In the profiling process, one side end face of the sliding shifting block 3 can slide under the action of centrifugal force and further attach to the inner end face of the pin hole seat of the piston, automatic alignment is achieved, the pin hole seat is uniformly stressed, and machining precision is improved.
The boss 5 is arranged to play a role in guiding and limiting, so that the sliding shifting block 3 can only longitudinally slide along the boss 5 and cannot transversely slide on the base 4.
In short, the above description is only a preferred embodiment of the present invention, and all the equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the scope of the present invention.
Claims (7)
1. The utility model provides a slidingtype profile modeling shifting block frock for piston, characterized by, includes base, slip shifting block and connecting bolt, the base middle part is along vertically being equipped with the boss, open at the boss middle part has the screw, open the shifting block bottom of sliding has the draw-in groove, card on the boss draw-in groove slidable, open on the slip shifting block top has the recess, open the recess bottom has the through-hole that link up to the boss upper end downwards, connecting bolt's head bottom presses at the upper end opening part of through-hole, connecting bolt's bottom meshing is in the screw at boss middle part, the diameter of through-hole is greater than the diameter of connecting bolt screw and is less than the diameter of connecting bolt head.
2. The sliding type profiling shifting block tool for the piston as claimed in claim 1, wherein the thickness of the sliding shifting block is smaller than the distance between two inner end surfaces of a pin hole seat of the piston to be machined.
3. The sliding type profiling shifting block tool for the piston as claimed in claim 1, wherein the cross section of the boss is rectangular.
4. The sliding type profiling shifting block tool for the piston as claimed in claim 1 or 3, wherein the boss is in clearance fit with the clamping groove.
5. The sliding type profiling shifting block tool for the piston as claimed in claim 1, wherein the external thread of the screw rod of the connecting bolt is arranged at the bottom of the rod body, the length of the external thread is equal to the hole depth of the screw hole in the middle of the boss, and the part of the rod body above the external thread is a polished rod.
6. The sliding type profiling shifting block tool for the piston as claimed in claim 1, wherein the height of the head of the connecting bolt is smaller than the depth of the groove at the top end of the sliding shifting block.
7. The sliding type profiling shifting block tool for the piston as claimed in claim 1, wherein the diameter of the through hole is 1mm larger than that of the connecting bolt.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920603213.1U CN209811817U (en) | 2019-04-29 | 2019-04-29 | Sliding type copying shifting block tool for piston |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920603213.1U CN209811817U (en) | 2019-04-29 | 2019-04-29 | Sliding type copying shifting block tool for piston |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209811817U true CN209811817U (en) | 2019-12-20 |
Family
ID=68882127
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920603213.1U Active CN209811817U (en) | 2019-04-29 | 2019-04-29 | Sliding type copying shifting block tool for piston |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209811817U (en) |
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2019
- 2019-04-29 CN CN201920603213.1U patent/CN209811817U/en active Active
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