CN212337396U - Assembly structure of cam plate assembly and tool for realizing assembly structure - Google Patents
Assembly structure of cam plate assembly and tool for realizing assembly structure Download PDFInfo
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- CN212337396U CN212337396U CN202020713312.8U CN202020713312U CN212337396U CN 212337396 U CN212337396 U CN 212337396U CN 202020713312 U CN202020713312 U CN 202020713312U CN 212337396 U CN212337396 U CN 212337396U
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Abstract
The utility model relates to an assembly structure of cam piece subassembly to and a frock for assembling cam piece subassembly belongs to the VVL camshaft equipment technical field in the engine. The assembling structure of the cam plate component comprises a high-speed cam plate, a low-speed cam plate and a shaft sleeve; the high-speed cam sheet and the low-speed cam sheet are arranged closely together to form a group of cam sheets, and the cam sheets are fixed at set positions on the outer wall of the shaft sleeve in a tensioning mode; the cam sheets are taken as a whole structure, and a riveting structure is arranged on one side or two sides of the whole structure in the axial direction and enables the outer wall of the shaft sleeve to form bulges, and the bulges are preferably distributed in an annular shape. The utility model discloses on the basis of the conventional tight technology that rises, add and rivet the structure soon, can make the structure of cam piece subassembly more firm reliable.
Description
Technical Field
The utility model relates to an assembly structure of cam piece subassembly to and a frock for assembling cam piece subassembly belongs to the VVL camshaft equipment technical field in the engine.
Background
The air distribution phase mechanism of the engine is responsible for providing fresh air necessary for gasoline combustion work to the cylinder and discharging burnt waste gas. For a common engine without a variable valve technology, the opening and closing time and the lift of the air inlet and the air outlet are fixed, the valve timing of the engine cannot be changed according to the rotating speed of the engine, and the fixed and unchangeable valve lift hardly considers the working requirements of the engine under different rotating speed working conditions. Therefore, in order to meet the working requirement of the engine under all working conditions, a variable valve is required to be designed, the power performance of the engine is improved, and the combustion is more efficient. To solve the above problems, the VVL technology, i.e., the variable valve lift technology, is developed. The VVL technology can be used for matching with a proper valve lift at different rotating speeds and different loads of the engine, so that the engine uses a smaller valve lift at a low rotating speed and a small load, cold start is improved, and oil consumption is reduced. The large valve lift is used at high rotating speed and large load, the valve throttling loss is reduced, the inflation efficiency is improved, the power output of the engine at high rotating speed and large load is improved, the fuel consumption of the engine can be reduced, the fuel economy is improved, and the emission of HC and NOx is reduced.
The cam plate assembly is an important part in the VVL cam shaft and consists of a high-speed cam plate, a low-speed cam plate and a shaft sleeve, a split structure is usually adopted, the high-speed cam plate, the low-speed cam plate and the shaft sleeve are respectively processed and manufactured, and then the cam plate is fixedly assembled on the outer wall of the shaft sleeve through a tensioning process. The tensioning process is that a tensioning piece (usually in the form of a steel ball) is assembled in an inner hole of the shaft sleeve, the diameter of the steel ball is larger than the inner diameter of the shaft sleeve, and under the action of a push rod, the steel ball moves from one end of the inner hole of the shaft sleeve to the other end of the inner hole of the shaft sleeve to enable the side wall of the shaft sleeve to expand, so that the cam plate is fixed on the outer wall of the shaft sleeve. However, the cam plate is only fixed in the radial direction, and the axial direction of the shaft sleeve lacks of a limiting structure, so that the structural stability is insufficient.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: an assembling structure of a cam plate component is provided, so that the structure is more stable and reliable.
The utility model provides a technical scheme that its technical problem adopted is: the assembling structure of the cam plate component comprises a high-speed cam plate, a low-speed cam plate and a shaft sleeve; the high-speed cam sheet and the low-speed cam sheet are arranged closely together to form a group of cam sheets, and the cam sheets are fixed at set positions on the outer wall of the shaft sleeve in a tensioning mode; the cam sheets are taken as a whole structure, and a riveting structure is arranged on one side or two sides of the whole structure in the axial direction and enables the outer wall of the shaft sleeve to form bulges, and the bulges are preferably distributed in an annular shape.
In a preferable scheme, two groups of cam sheets are arranged on the outer wall of the shaft sleeve at intervals, the first group of cam sheets are arranged close to the end face of the shaft sleeve, and the group of cam sheets at the end face are provided with riveting structures on two sides; the second set of cam tabs are provided with a riveted structure on the side adjacent the first set of cam tabs. When the cam shaft assembly is applied to cam shaft assembly, the other side of the second group of cam sheets is assembled with other parts, and therefore, the side can be free of a riveting structure for playing a role in axial limiting.
Correspondingly, the utility model discloses provide a can realize the package assembly's of above-mentioned cam piece subassembly frock simultaneously, cam piece and axle sleeve are in the same place according to conventional tight technology pre-assembling that rises, and to the riveted structure part, the concrete scheme of frock is as follows: the device comprises a mandrel, wherein the mandrel is provided with a driving mechanism for driving the mandrel to rotate, the mandrel is fixedly connected with a shaft sleeve, and the mandrel and the shaft sleeve are coaxially arranged; taking a group of cam sheets as an integral structure, and arranging spin riveting rollers on one side or two sides of the integral structure in the axial direction; the spin riveting roller is rotationally arranged through the rotating shaft, and the installation position of the spin riveting roller is configured as follows: when the mandrel drives the shaft sleeve to rotate, the rotary riveting roller can enable the outer wall of the shaft sleeve to form a bulge.
In a preferable scheme, two groups of cam sheets are arranged on the outer wall of the shaft sleeve at intervals, the first group of cam sheets are arranged close to the end face of the shaft sleeve, and the group of cam sheets positioned at the end face are provided with an end face spin riveting roller on one side and an overtravel groove spin riveting roller on the other side; the second group of cam sheets is provided with an overtravel groove spin riveting roller at the side close to the first group of cam sheets.
The utility model has the advantages that: when the device is implemented, under the power of the driving mechanism, the mandrel drives the workpiece to rotate integrally, the spin riveting roller rotates passively, the shaft sleeve made of metal generates local deformation under the extrusion effect, and a bulge is formed at the side position of the cam sheet, so that the purpose of limiting the axial movement of the part is achieved. The utility model discloses on the basis of the conventional tight technology that rises, add and rivet the structure soon, can make the structure of cam piece subassembly more firm reliable.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Parts, positions and numbers in the drawings: the high-speed cam sheet 1, the low-speed cam sheet 2, the shaft sleeve 3, the mandrel 4, the end face spin riveting roller 5 and the overtravel groove spin riveting roller 6.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the assembly structure of the cam plate assembly of the present invention includes a high-speed cam plate 1, a low-speed cam plate 2 and a shaft sleeve 3; a high-speed cam sheet 1 and a low-speed cam sheet 2 are arranged closely together to form a group of cam sheets, and the cam sheets are fixed at set positions on the outer wall of the shaft sleeve 3 in a tensioning manner; a set of cam pieces is taken as a whole structure, and a riveting structure is arranged on one side or two sides of the whole structure in the axial direction, and the riveting structure enables the outer wall of the shaft sleeve 3 to form a bulge, and the bulge is preferably distributed in an annular shape.
In a preferable scheme, two groups of cam sheets are arranged on the outer wall of the shaft sleeve 3 at intervals, the first group of cam sheets are arranged close to the end face of the shaft sleeve 3, and the group of cam sheets at the end face are provided with riveting structures on two sides of the cam sheets; the second set of cam tabs are provided with a riveted structure on the side adjacent the first set of cam tabs. When the cam plate assembly is applied to cam shaft assembly, the other side of the second group of cam plates is assembled with other parts, so that the side can be free of an axial limiting structure, namely, the position can be free of the riveting structure, the integral structure of the device is simplified, and the assembly precision is ensured. The positions of the high-speed cam plate 1 and the low-speed cam plate 2 can be interchanged as the same VVL camshaft, and only one cam plate corresponds to one cam plate. Referring to fig. 1, the low-speed cam plate 2 is located on the left side of the high-speed cam plate 1 as long as it is ensured that the cam plates of each set are arranged in the above-described manner. In addition, on the basis of the embodiment of fig. 1, the positions of the high-speed cam piece 1 and the low-speed cam piece 2 can be interchanged, and after the positions are interchanged, the cam pieces of each group are the low-speed cam piece 2 on the right side and the high-speed cam piece 1 on the left side.
Correspondingly, the utility model discloses provide a can realize the package assembly's of above-mentioned cam piece subassembly frock simultaneously, cam piece and axle sleeve 3 according to conventional tight technology of rising and assemble in advance together, to the riveted structure part, the concrete scheme of frock as follows: the device comprises a mandrel 4, wherein the mandrel 4 is provided with a driving mechanism for driving the mandrel 4 to rotate, the mandrel 4 and a shaft sleeve 3 are fixedly connected and assembled in an interference fit mode, and the mandrel 4 and the shaft sleeve 3 are coaxially arranged; taking a group of cam sheets as an integral structure, and arranging spin riveting rollers on one side or two sides of the integral structure in the axial direction; the spin riveting roller is rotationally arranged through the rotating shaft, and the installation position of the spin riveting roller is configured as follows: when the mandrel 4 drives the shaft sleeve 3 to rotate, the riveting roller can enable the outer wall of the shaft sleeve 3 to form a bulge.
In a preferable scheme, two groups of cam sheets are arranged on the outer wall of the shaft sleeve 3 at intervals, the first group of cam sheets is arranged close to the end face position of the shaft sleeve 3, and the group of cam sheets positioned at the end face position is provided with an end face spin riveting roller 5 on one side and an overtravel groove spin riveting roller 6 on the other side; the second set of cam pieces is provided with an overtravel slot spin-on roller 6 on the side close to the first set of cam pieces. When the device is implemented, under the power of the driving mechanism, the mandrel 4 drives the workpiece to rotate integrally, the spin riveting roller rotates passively, the shaft sleeve made of metal generates local deformation under the extrusion effect, and a bulge is formed at the side position of the cam sheet, so that the purpose of limiting the axial movement of the part is achieved. The utility model discloses on the basis of the conventional tight technology that rises, add and rivet the structure soon, can make the structure of cam piece subassembly more firm reliable.
Claims (5)
1. The assembling structure of the cam plate component comprises a high-speed cam plate (1), a low-speed cam plate (2) and a shaft sleeve (3); the high-speed cam sheet (1) and the low-speed cam sheet (2) are closely arranged together to form a group of cam sheets, and the cam sheets are fixed at set positions on the outer wall of the shaft sleeve (3) in a tensioning mode; the method is characterized in that: a group of cam sheets are taken as an integral structure, and a riveting structure is arranged on one side or two sides of the integral structure in the axial direction and enables the outer wall of the shaft sleeve (3) to form a bulge.
2. The cam plate assembly assembling structure according to claim 1, wherein: the riveting structure enables the outer wall of the shaft sleeve (3) to form bulges distributed in a ring shape.
3. The cam plate assembly assembling structure according to claim 1 or 2, wherein: two groups of cam sheets are arranged on the outer wall of the shaft sleeve (3) at intervals, the first group of cam sheets are arranged close to the end face of the shaft sleeve (3), and the two sides of the group of cam sheets at the end face are provided with riveting structures; the second set of cam tabs are provided with a riveted structure on the side adjacent the first set of cam tabs.
4. The tooling for assembling the cam plate assembly comprises a high-speed cam plate (1), a low-speed cam plate (2) and a shaft sleeve (3); the high-speed cam sheet (1) and the low-speed cam sheet (2) are closely arranged together to form a group of cam sheets, and the cam sheets are fixed at set positions on the outer wall of the shaft sleeve (3) in a tensioning mode; the method is characterized in that: the spindle (4) is provided with a driving mechanism for driving the spindle (4) to rotate, the spindle (4) is fixedly connected with the shaft sleeve (3), and the spindle and the shaft sleeve are coaxially arranged; taking a group of cam sheets as an integral structure, and arranging spin riveting rollers on one side or two sides of the integral structure in the axial direction; the spin riveting roller is rotationally arranged through the rotating shaft, and the installation position of the spin riveting roller is configured as follows: when the mandrel (4) drives the shaft sleeve (3) to rotate, the rotary riveting roller can enable the outer wall of the shaft sleeve (3) to form a bulge.
5. The tooling for assembling a cam plate assembly of claim 4, wherein: two groups of cam sheets which are arranged at intervals are arranged on the outer wall of the shaft sleeve (3), the first group of cam sheets is arranged close to the end face position of the shaft sleeve (3), one side of the group of cam sheets which are positioned at the end face position is provided with an end face spin riveting roller (5), and the other side of the group of cam sheets is provided with an overtravel groove spin riveting roller (6); the second group of cam sheets is provided with an overtravel groove spin riveting roller (6) at the side close to the first group of cam sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020713312.8U CN212337396U (en) | 2020-04-30 | 2020-04-30 | Assembly structure of cam plate assembly and tool for realizing assembly structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020713312.8U CN212337396U (en) | 2020-04-30 | 2020-04-30 | Assembly structure of cam plate assembly and tool for realizing assembly structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212337396U true CN212337396U (en) | 2021-01-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020713312.8U Active CN212337396U (en) | 2020-04-30 | 2020-04-30 | Assembly structure of cam plate assembly and tool for realizing assembly structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212337396U (en) |
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2020
- 2020-04-30 CN CN202020713312.8U patent/CN212337396U/en active Active
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