Camshaft press-fitting device and camshaft thereof

Abstract

The utility model belongs to camshaft technical field, concretely relates to a camshaft press -fitting device and camshaft thereof, wherein the device includes including press -fitting platform, press -fitting frame and a plurality of grabbing manipulator, a plurality of trays are sequentially arranged on the press -fitting platform, and the press -fitting plate is arranged on one side of the press -fitting platform, and the press -fitting plate is provided with the placing groove corresponding with the material in each tray, the press -fitting frame is set up above the press -fitting platform, and the press -fitting frame is provided with the press -fitting integrated manipulator along the length direction of press -fitting plate and slides, the press -fitting end of press -fitting integrated manipulator is perpendicular to the axis line of a plurality of placing grooves, a plurality of grabbing manipulators are installed on the press -fitting frame and are used for placing the corresponding material in the tray in its corresponding placing groove. Through the press -fitting device, the camshaft is integrally die-cast, and the camshaft is integrally formed, so that the consistency of the cam profile and the roughness of the cam surface is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of camshaft technology, and more specifically, it relates to a camshaft press-fitting device and its camshaft. Background Technology

[0002] As one of the key components of a diesel engine, the machining quality of the camshaft directly affects the engine's valve timing, fuel economy, emissions performance, and service life.

[0003] Currently, the traditional camshaft manufacturing process typically involves forging to obtain the blank, followed by multiple machining processes and heat treatment to finally form a finished camshaft that meets the requirements. In addition to this process, gear components need to be press-fitted to meet transmission requirements.

[0004] However, conventional camshafts are mostly made of steel or injection-molded nylon, requiring forging, machining, and heat treatment. Therefore, the overall production cycle is long and production efficiency is low. Secondly, camshafts and timing gears are often machined separately using keyways, then press-fitted using keyway positioning, or filled and constructed using injection molding. This method affects the valve timing of the camshaft, resulting in significant errors. During machining, due to equipment precision and processing efficiency issues, the cam profile, surface roughness, and valve timing may fail to meet design requirements, impacting diesel engine emissions, fuel economy, and service life.

[0005] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a camshaft press-fitting device and its camshaft, in order to achieve a more practical purpose. Utility Model Content

[0006] In view of the problems mentioned in the background art above, the present invention provides a camshaft press-fitting device and its camshaft.

[0007] On one hand, the technical solution adopted by this utility model is as follows: a camshaft pressing device and its camshaft, including a pressing table, a pressing frame and multiple gripping robots. Multiple trays are arranged sequentially on the pressing table, and a pressing plate is arranged on one side of the pressing table. The pressing plate has a placement groove corresponding to the material in each tray. The pressing frame is mounted above the pressing table, and an integrated pressing robot is slidably arranged on the pressing frame along the length direction of the pressing plate. The pressing end of the integrated pressing robot is perpendicular to the line connecting the axes of the multiple placement grooves. The multiple gripping robots are installed on the pressing frame and are used to place the corresponding material in the tray into its corresponding placement groove.

[0008] Furthermore, the plurality of said pallets includes a second pallet, a third pallet, a fourth pallet, a fifth pallet, a sixth pallet, a seventh pallet, and a first pallet, which are sequentially arranged on the pressing table.

[0009] Furthermore, the second tray array has several slots for placing positioning blocks, the third tray array has several slots for placing intake bulges, the fourth tray array has several slots for placing oil pump bulges, the fifth tray array has several slots for placing exhaust bulges, the sixth tray array has several slots for placing gear assemblies, the seventh tray array has several slots for placing central bushings, and the first tray array has several slots for placing central shafts.

[0010] Furthermore, there are four gripping robots mounted on the pressing frame, located between the second and third trays, between the fourth and fifth trays, between the sixth and seventh trays, and above the first tray.

[0011] Furthermore, the placement groove is provided with a shaft hole that matches the central shaft.

[0012] Furthermore, a feeding rack is provided on the side of the pressing frame away from the pallet, and a feeding robot is installed on the feeding rack, located between the seventh pallet and the first pallet.

[0013] On the other hand, the technical solution adopted by this utility model is as follows: a camshaft, comprising a central shaft, a positioning block, an intake convex bulge, an oil pump convex bulge, an exhaust convex bulge, a gear assembly, and a central shaft sleeve, which are sequentially press-fitted into one piece.

[0014] Furthermore, the components of the camshaft are reinforced and connected through a welded layer structure.

[0015] The beneficial effects of this utility model are:

[0016] 1. By setting up a pressing station with multiple pallets and pressing plates with corresponding placement slots, this layout provides the physical basis and precise positioning for the sequential pressing of different components. It integrates the dispersed workstations of a traditional production line into a compact linear layout. Components are placed sequentially on pallets and precisely positioned into their corresponding slots by a gripping robot. This layout eliminates the cumulative errors caused by component transfer and repeated positioning between multiple workstations, ensuring the initial positional accuracy of all components to be pressed relative to the central axis from the outset. This creates the prerequisite for subsequent high-precision pressing by an integrated pressing robot, solving the problem in traditional technologies where multiple clamping and inaccurate positioning lead to difficulties in achieving ideal cam profiles and valve timing.

[0017] 2. The camshaft is integrally die-cast using a press-fitting device. This integral molding ensures the consistency of the cam profile and surface roughness, and the accuracy of the timing angle of the camshaft gear assembly is also guaranteed by the corresponding placement groove, thus improving the service life of the camshaft. At the same time, no further processing is required after press-fitting, which ensures the accuracy of the valve timing of the diesel engine and the runout of each cam, reducing the fuel consumption and emissions of the diesel engine, improving economic efficiency, and greatly increasing production efficiency. Attached Figure Description

[0018] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 This is a front view schematic diagram of a camshaft press-fitting device according to the present invention;

[0020] Figure 2 This is a rear view schematic diagram of a camshaft press-fitting device according to the present invention;

[0021] Figure 3 This is a schematic diagram of a camshaft according to the present invention;

[0022] Figure 4 This is a schematic diagram of the gripping robotic arm of this utility model;

[0023] The attached diagram is labeled as follows:

[0024] Pressing table 1, first pallet 11, second pallet 12, third pallet 13, fourth pallet 14, fifth pallet 15, sixth pallet 16, seventh pallet 17, pressing frame 2, gripping robot 3, pressing cylinder 31, traveling vehicle 32, slide rail 33, track 34, gripper 35, pressing plate 4, placement slot 41, shaft hole 42, integrated pressing robot 5, unloading rack 6, unloading robot 7;

[0025] Camshaft 100, center shaft 101, positioning block 102, intake cam 103, oil pump cam 104, exhaust cam 105, gear assembly 106, center shaft sleeve 107. Detailed Implementation

[0026] Example 1:

[0027] like Figures 1-2As shown, a camshaft pressing device includes a pressing table 1, a pressing frame 2, and multiple gripping robots 3. Multiple trays are sequentially arranged on the pressing table 1, and a pressing plate 4 is located on one side of the pressing table 1. The pressing plate 4 has placement slots 41 corresponding to the materials in each tray. The pressing frame 2 is mounted above the pressing table 1, and an integrated pressing robot 5 is slidably mounted on the pressing frame 2 along the length of the pressing plate 4. The pressing end of the integrated pressing robot 5 is perpendicular to the axis connecting the axes of the placement slots 41. The multiple gripping robots 3 are mounted on the pressing frame 2 and are used to place the corresponding materials from the trays into their corresponding placement slots 41.

[0028] By adopting the above technical solution, and by setting up a pressing station 1 containing multiple pallets and a pressing plate 4 with a corresponding placement slot 41, this layout provides a physical basis and precise positioning for the sequential pressing of different components. It integrates the dispersed workstations on a traditional production line into a compact linear layout. Components are placed sequentially on pallets and precisely placed into the corresponding placement slots 41 by the gripping robot 3. This layout eliminates the cumulative errors caused by component transfer and repeated positioning between multiple workstations, ensuring the initial positional accuracy of all components to be pressed relative to the central axis 101 from the source. This creates the prerequisite for the subsequent high-precision pressing by the integrated pressing robot 5, solving the problem in traditional technologies where the cam profile and valve timing are difficult to achieve ideal states due to multiple clamping and inaccurate positioning.

[0029] like Figure 4 As shown, the gripping robot 3 is specifically configured with a pressing cylinder 31, which is mounted on a traveling carriage 32. The traveling carriage 32 is connected to a slide rail 33 on the pressing frame 2. The output end of the pressing cylinder 31 is provided with a track 34 for the gripper 35 to travel on. This is controlled by a PLC, which is existing technology and will not be elaborated further. Other robot structures can also be implemented; the pressing integrated robot 5 and the unloading robot are similar. Other robot structures can also be used, and no particular structural limitation is imposed.

[0030] As a preferred embodiment, the plurality of pallets include a second pallet 12, a third pallet 13, a fourth pallet 14, a fifth pallet 15, a sixth pallet 16, a seventh pallet 17, and a first pallet 11, which are sequentially arranged on the pressing table 1.

[0031] As a preferred embodiment, the second tray 12 is provided with a plurality of slots for placing positioning blocks 102, the third tray 13 is provided with a plurality of slots for placing intake bulges 103, the fourth tray 14 is provided with a plurality of slots for placing oil pump bulges 104, the fifth tray 15 is provided with a plurality of slots for placing exhaust bulges 105, the sixth tray 16 is provided with a plurality of slots for placing gear assemblies 106, the seventh tray 17 is provided with a plurality of slots for placing central bushings 107, and the first tray 11 is provided with a plurality of slots for placing central shafts 101.

[0032] The trays are arranged sequentially, with corresponding materials to be pressed into each tray. This follows the logical sequence of camshaft 100 assembly and the process force requirements. First, a reference center shaft 101 is provided. Then, the components are stacked and assembled in a structural order from the inside out, and from support components to functional components. This sequence ensures that each subsequent component can be pressed in after the previous component has been correctly positioned, avoiding assembly interference and allowing the pressing force to be effectively transmitted through the assembled components, preventing damage to the parts. This optimizes the assembly process, ensures the stability of the assembly process and the accuracy of the relative positions between components, thereby ensuring the phase accuracy of the final camshaft 100.

[0033] As a preferred embodiment, four gripping robots 3 are mounted on the pressing frame 2, located between the second tray 12 and the third tray 13, between the fourth tray 14 and the fifth tray 15, between the sixth tray 16 and the seventh tray 17, and above the first tray 11. The arrangement of the four gripping robots 3 is optimized based on the position and loading / unloading frequency of each component, allowing each robot to handle the loading and unloading tasks of adjacent or critical workstations. This shortens the robot's travel distance and waiting time, enabling parallel or rapid alternating gripping of multiple components. This efficient material handling system reduces equipment idle time, increases the cycle time of the entire pressing production line, and effectively shortens the production cycle of a single camshaft 100.

[0034] As a preferred embodiment, the placement groove 41 is provided with a shaft hole 42 that matches the central shaft 101. This structure provides a core positioning reference for the entire press-fitting process. During press-fitting, after the corresponding material is placed in the placement groove 41, the placement groove 41 constrains the corresponding material, ensuring that the material will not shift during press-fitting. The press-fitting integrated robot arm 5 grasps the central shaft 101 and inserts it into the shaft hole 42, thereby constraining and positioning the central shaft 101 in the radial and axial directions. This ensures that the central shaft 101 remains stable during the subsequent press-fitting of multiple components, without shifting or tilting. This ensures that all components such as convex cams and gears can be press-fitted with the axis of the central shaft 101 as the reference, fundamentally guaranteeing the coaxiality and phase angle accuracy of the final camshaft 100.

[0035] As a preferred embodiment, a feeding rack 6 is provided on the side of the pressing frame 2 away from the pallet, and a feeding robot 7 is installed on the feeding rack 6, located between the seventh pallet 17 and the first pallet 11. After the integrated pressing robot 5 completes the pressing, the finished camshaft 100 is moved to the feeding station, where the feeding robot 7 immediately grabs it and moves it out of the work area, placing it into a turnover device or the next process, thus automating the entire process.

[0036] On the other hand, Example 2:

[0037] like Figure 3 As shown, a camshaft includes a central shaft 101, a positioning block 102, an intake cam 103, an oil pump cam 104, an exhaust cam 105, a gear assembly 106, and a central shaft sleeve 107, which are sequentially press-fitted into one piece.

[0038] By adopting the above technical solution, the camshaft 100 is integrally die-cast using a press-fitting device. Since the camshaft 100 is integrally formed, the consistency of its cam profile and cam surface roughness is guaranteed. Furthermore, the accuracy of the timing angle of the camshaft 100 gear assembly 106 is also guaranteed by the setting of the corresponding placement groove 41, which improves the service life of the camshaft 100. At the same time, no further processing is required after one press-fitting, thus ensuring the accuracy of the valve timing of the diesel engine and the runout of each cam, reducing the fuel consumption and emissions of the diesel engine, improving economic efficiency, and greatly increasing production efficiency.

[0039] As a preferred embodiment, the components of the camshaft 100 are reinforced and connected through a welded layer structure. This welded layer provides the final structural reinforcement connection, allowing the preceding press-fitting process to be performed with a more optimized interference fit, reducing press-fitting difficulty and the risk of component damage. Thus, while ensuring strength requirements, it also considers production efficiency and yield.

[0040] The present invention has been described in detail above. The specific embodiments are provided only to help understand the method and core idea of ​​the present invention. It should be noted that those skilled in the art can make various improvements and modifications to the present invention without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A camshaft press-fitting device, characterized in that: include A pressing table (1) is provided with multiple trays arranged in sequence on the pressing table (1). A pressing plate (4) is provided on one side of the pressing table (1). The pressing plate (4) has a placement slot (41) corresponding to the material in each tray. Pressing frame (2), the pressing frame (2) is mounted above the pressing table (1), and the pressing frame (2) is slidably provided with a pressing integrated robot (5) along the length direction of the pressing plate (4), the pressing end of the pressing integrated robot (5) is perpendicular to the axis connecting the several placement slots (41); Multiple gripping robots (3) are mounted on the pressing frame (2) for placing the corresponding materials in the pallet into their corresponding placement slots (41).

2. The camshaft press-fitting device according to claim 1, characterized in that: The plurality of said pallets include a second pallet (12), a third pallet (13), a fourth pallet (14), a fifth pallet (15), a sixth pallet (16), a seventh pallet (17), and a first pallet (11) arranged sequentially on the pressing table (1).

3. The camshaft press-fitting device according to claim 2, characterized in that: The second tray (12) is provided with a plurality of slots for placing positioning blocks (102), the third tray (13) is provided with a plurality of slots for placing air intake protrusions (103), the fourth tray (14) is provided with a plurality of slots for placing oil pump protrusions (104), the fifth tray (15) is provided with a plurality of slots for placing exhaust protrusions (105), the sixth tray (16) is provided with a plurality of slots for placing gear assemblies (106), the seventh tray (17) is provided with a plurality of slots for placing central bushings (107), and the first tray (11) is provided with a plurality of slots for placing central shafts (101).

4. The camshaft press-fitting device according to claim 3, characterized in that: The gripping manipulator (3) has four units installed on the pressing frame (2), located between the second tray (12) and the third tray (13), between the fourth tray (14) and the fifth tray (15), between the sixth tray (16) and the seventh tray (17), and above the first tray (11).

5. The camshaft press-fitting device according to claim 4, characterized in that: The placement groove (41) is provided with a shaft hole (42) for matching the central shaft (101).

6. The camshaft press-fitting device according to claim 4, characterized in that: The pressing frame (2) is provided with a feeding rack (6) on the side away from the pallet. The feeding rack (6) is equipped with a feeding robot (7) located between the seventh pallet (17) and the first pallet (11).

7. A camshaft, formed by press-fitting the press-fitting device according to any one of claims 1 to 6, characterized in that: The camshaft (100) includes a central shaft (101), a positioning block (102), an intake cam (103), an oil pump cam (104), an exhaust cam (105), a gear assembly (106), and a central shaft sleeve (107), which are sequentially press-fitted into one piece.

8. A camshaft according to claim 7, characterized in that: The components of the camshaft (100) are reinforced and connected by a welded layer structure.

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