Press fitting device for assembling camshaft cover positioning pin

Abstract

A press-fitting device for assembling camshaft cover positioning pins comprises a plurality of stand columns, a top plate is arranged at the upper ends of the stand columns, a bottom plate is arranged at the lower ends of the stand columns, an air cylinder is arranged on the upper end face of the top plate, and a piston rod of the air cylinder penetrates through a through hole formed in the top plate to be fixedly connected with a lower pressing plate. The lower pressing plate and the supporting plate are both in sliding fit with the stand column, axial movement of the supporting plate is limited by a limiting device, the lower end face of the lower pressing plate is provided with an abutting device extending downwards, the upper end face of the bottom plate is provided with an ejecting column extending upwards, and the ejecting column is in sliding fit with the interior of a through hole formed in the supporting plate. The abutting device is used for abutting against the camshaft cover placed on the upper end face of the supporting plate, and the jacking column is used for abutting against the positioning pin placed in the through hole of the supporting plate.

Description

Technical Field

[0001] This utility model relates to the field of camshaft covers, and more specifically to a press-fitting device for assembling locating pins for camshaft covers. Background Technology

[0002] The camshaft cover of a motorcycle or automobile has a locating pin mounting hole. When assembling the camshaft cover with the camshaft cylinder head, the locating pin needs to be interference-fitted into the locating pin mounting hole of the camshaft cover first, and then the camshaft cover is assembled with the cylinder head. For example, CN208396824U discloses a centrally located assembly positioning structure for an automobile engine camshaft cover, such as... Figure 4 As shown, the two ends of the locating pin 103 are respectively interference-fitted into the locating holes provided in the cylinder head and camshaft cover.

[0003] Currently, the assembly of locating pins is done manually, using tools such as hammers and ball screw assemblies. The locating pins are then fitted into the locating pin mounting holes on the camshaft cover by striking and turning. This manual method results in low production efficiency, inconsistent product quality, high labor intensity, and inherent risks. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a press-fitting device for assembling locating pins on camshaft covers. This device is driven by a cylinder to move the lower pressure plate along the axial direction of the column, so that the abutting device abuts against the camshaft cover and presses it down, causing the locating pin, which is set in the through hole of the support plate, to be interference-fitted into the locating pin assembly hole of the camshaft cover under the action of the top column.

[0005] The objective of this utility model is achieved through the following solution:

[0006] A press-fitting device for assembling camshaft cover locating pins includes multiple columns. A top plate is provided at the upper end of each column, and a bottom plate is provided at the lower end. A cylinder is provided on the upper surface of the top plate. The piston rod of the cylinder passes through a through hole in the top plate and is fixedly connected to a lower pressure plate. A support plate is provided between the lower pressure plate and the bottom plate. Both the lower pressure plate and the support plate are slidably fitted on the columns, and the axial movement of the support plate is restricted by a limiting device. A downwardly extending abutting device is provided on the lower end surface of the lower pressure plate, and an upwardly extending top post is provided on the upper surface of the bottom plate. The top post is slidably fitted within a through hole in the support plate. The abutting device abuts against a camshaft cover placed on the upper surface of the support plate, and the top post abuts against a locating pin placed within the through hole of the support plate.

[0007] Preferably, the limiting device is an upwardly extending limiting rod provided on the upper surface of the base plate, and the height of the limiting rod is less than the height of the top column.

[0008] Preferably, the column is a round shaft and is sleeved in a linear bearing cylinder in which both the lower pressure plate and the support plate are provided.

[0009] Preferably, the lower end face of the lower pressure plate is provided with a plurality of abutting devices. Each abutting device includes a shaft that is clearance-fitted into the through hole of the lower pressure plate. One end of the shaft is provided with a circumferential boss, and the other end is provided with an abutting head larger than the diameter of the shaft. A compression spring is fitted on the shaft. One end of the compression spring abuts against the lower end face of the lower pressure plate, and the other end abuts against the abutting head.

[0010] Preferably, the abutting device includes a central abutting device for abutting the center of the camshaft cover and a peripheral abutting device for abutting the periphery of the camshaft cover, wherein the abutting head diameter of the central abutting device is larger than the abutting head diameter of the peripheral abutting device.

[0011] Preferably, the upper surface of the support plate is provided with a positioning device for positioning the camshaft cover.

[0012] Preferably, a spring is fitted on the cylindrical column, with one end of the spring abutting against the linear bearing of the support plate and the other end abutting against the base plate.

[0013] Preferably, there are multiple top posts, which are slidably fitted into multiple through holes in the support plate.

[0014] Preferably, the through hole in the support plate is a stepped hole, the top column shaft segment that slides within the through hole is a stepped shaft, the free end of the shaft segment is a small diameter segment, and the fixed end is a large diameter segment.

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

[0016] The lower pressure plate is driven by a cylinder to move along the column axis, realizing the automatic pressing of the positioning pin. This avoids the traditional operation of manual knocking or twisting, greatly improving assembly efficiency, making it suitable for mass production, and ensuring high installation accuracy.

[0017] Traditional manual assembly can be dangerous, such as flying debris from hammering or tools slipping, while this device reduces potential safety hazards during manual operation by using a cylinder-driven mechanism.

[0018] The center abutment device and the peripheral abutment device are set to ensure that the force on the camshaft cover is even and the locating pin assembly is more precise; multiple top pillars are set to assemble multiple locating pins at the same time, which increases production efficiency; a positioning device is set on the upper surface of the support plate to facilitate the positioning of the camshaft cover. Attached Figure Description

[0019] Figure 1 This is a structural view of the present invention;

[0020] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure at point A;

[0022] Figure 4 A schematic diagram of the assembly and positioning structure for the camshaft cover of an existing automobile engine. Detailed Implementation

[0023] like Figures 1 to 3As shown, a press-fitting device for assembling camshaft cover locating pins includes multiple columns 1, each column 1 being a round shaft. In this invention, four round shaft columns 1 are respectively positioned at the four corners of the press-fitting device. A top plate 2 is provided at the upper end of each column 1, and a bottom plate 3 is provided at the lower end. Both the top plate 2 and the bottom plate 3 are fixedly connected to the upper and lower end faces of the column 1 by screws. A cylinder 4 is provided on the upper end face of the top plate 2, and a boss is provided at the bottom end of the cylinder 4. The cylinder 4 is fixed to the upper end face of the top plate 2 by screws. The piston rod 5 of the cylinder 4 passes through a through hole provided in the top plate 2, and the free end of the piston rod 5 is provided with an external thread. It is fixedly connected to a lower pressure plate 6 with an internal threaded hole at its center by threaded engagement. A support plate 7 is provided between the lower pressure plate 6 and the bottom plate 3. The lower pressure plate 6 and the support plate... Linear bearings 12 are provided at each of the four corners of the support plate 7. The column 1 is sleeved inside the cylinder of the linear bearing 12. The lower pressure plate 6 and the support plate 7 are slidably fitted on it, and the axial movement of the support plate 7 is restricted by a limiting device. The limiting device is a limiting rod 11 extending upward from the upper end face of the bottom plate 3. The height of the limiting rod 11 is less than the height of the top column 8. The limiting rod is used to limit the downward movement range of the support plate 7, preventing the support plate 7 from being too low or even contacting the bottom plate. The lower end face of the lower pressure plate 6 is provided with multiple abutment devices. The abutment device includes a shaft 13 that is clearance-fitted into the through hole of the lower pressure plate 6. One end of the shaft 13 is provided with a circumferential boss, and the other end is provided with an abutment 14 larger than the diameter of the shaft 13. A compression fitting is fitted on the shaft 13. A spring 15, one end of which abuts against the lower end face of the lower pressure plate 6, and the other end abuts against the abutment joint 14. The upper end face of the base plate 3 is provided with upwardly extending top posts 8, multiple of which are slidably fitted into multiple through holes opened in the support plate 7. The through holes opened in the support plate 7 are stepped holes, and the shaft segments of the top posts 8 slidably fitted into the through holes are stepped shafts, with the free end of the shaft segment being a small diameter segment and the fixed end being a large diameter segment. The abutment device is used to abut against the camshaft cover 9 placed on the upper end face of the support plate 7. The top posts 8 are used to abut against the positioning pins 10 placed in the through holes of the support plate 7. The abutment device includes a central abutment device 16 for abutting against the center of the camshaft cover 9 and a peripheral abutment device 17 for abutting against the periphery of the camshaft cover 9. The diameter of the abutment 14 of the connecting device 16 is larger than the diameter of the abutment 14 of the peripheral abutment devices 17. The abutment 14 of the central abutment device 16 is conical, with the lower end diameter larger than the upper end diameter. There are two of them, arranged in the center of the lower pressure plate 6. There are four peripheral abutment devices 17, symmetrically distributed on both sides of the axis where the central abutment device 16 is located. The upper end face of the support plate 7 is provided with a positioning device 18 for positioning the camshaft cover 9. In this embodiment, the positioning device 18 consists of two positioning blocks, which cooperate with the camshaft cover 9 to position the camshaft cover 9. A spring is sleeved on the round shaft column 1. One end of the spring abuts against the linear bearing 12 of the support plate 7, and the other end abuts against the bottom plate 3. When the piston rod 5 of the cylinder 4 retracts, the spring plays a reset role.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A press-fitting device for assembling locating pins on camshaft covers, characterized in that: The device includes multiple columns (1), with a top plate (2) at the upper end and a bottom plate (3) at the lower end. A cylinder (4) is provided at the upper end of the top plate (2). The piston rod (5) of the cylinder (4) passes through the through hole provided in the top plate (2) and is fixedly connected to the lower pressure plate (6). A support plate (7) is provided between the lower pressure plate (6) and the bottom plate (3). The lower pressure plate (6) and the support plate (7) are both slidably fitted on the columns (1) and the axial movement of the support plate (7) is restricted by a limiting device. The lower end face of the lower pressure plate (6) is provided with a downwardly extending abutment device. The upper end face of the bottom plate (3) is provided with an upwardly extending top column (8). The top column (8) is slidably fitted in the through hole opened in the support plate (7). The abutment device is used to abut against the camshaft cover (9) placed on the upper end face of the support plate (7). The top column (8) is used to abut against the positioning pin (10) placed in the through hole of the support plate (7).

2. The press-fitting device for assembling camshaft cover locating pins as described in claim 1, characterized in that: The limiting device is an upwardly extending limiting rod (11) provided on the upper surface of the base plate (3), and the height of the limiting rod (11) is less than the height of the top column (8).

3. The press-fitting device for assembling camshaft cover locating pins as described in claim 1, characterized in that: The column (1) is a round shaft and is sleeved in the cylinder of the linear bearing (12) provided in both the lower pressure plate (6) and the support plate (7).

4. The press-fitting device for assembling camshaft cover locating pins as described in claim 1, characterized in that: The lower end face of the lower pressure plate (6) is provided with multiple abutting devices. The abutting device includes a shaft (13) with clearance fit in the through hole of the lower pressure plate (6). One end of the shaft (13) is provided with a circumferential boss, and the other end is provided with an abutting head (14) larger than the diameter of the shaft (13). A compression spring (15) is fitted on the shaft (13). One end of the compression spring (15) abuts against the lower end face of the lower pressure plate (6), and the other end abuts against the abutting head (14).

5. The press-fitting device for assembling camshaft cover locating pins as described in claim 1, characterized in that: The abutting device includes a central abutting device (16) for abutting the center of the camshaft cover (9) and a peripheral abutting device (17) for abutting the periphery of the camshaft cover (9), wherein the diameter of the abutting joint (14) of the central abutting device (16) is larger than the diameter of the abutting joint (14) of the peripheral abutting device (17).

6. The press-fitting device for assembling camshaft cover locating pins as described in claim 1, characterized in that: The upper end face of the support plate (7) is provided with a positioning device (18) for positioning the camshaft cover (9).

7. The press-fitting device for assembling camshaft cover locating pins as described in claim 3, characterized in that: A spring is fitted on the cylindrical column (1), with one end of the spring abutting against the linear bearing (12) of the support plate (7) and the other end abutting against the base plate (3).

8. The press-fitting device for assembling camshaft cover locating pins as described in claim 1, characterized in that: There are multiple top posts (8), which are slidably fitted into multiple through holes in the support plate (7).

9. The press-fitting device for assembling camshaft cover locating pins as described in claim 1 or 8, characterized in that: The through hole of the support plate (7) is a stepped hole, and the shaft segment of the top column (8) that slides in the through hole is a stepped shaft. The free end of the shaft segment is a small diameter segment, and the fixed end is a large diameter segment.

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