Automatic press-fitting device for fuel injector bushing

Abstract

The utility model discloses an automatic press -mounting device of oil sprayer bushing is installed in the press -mounting station department of work piece conveying line, including base, fixed mounting has linear guide on the base, the linear guide sliding installation has slide, fixed mounting has the press -mounting head with inner chamber on the slide, the press -mounting head of the base is installed with the press -mounting power cylinder of drive feed, and the telescopic end of press -mounting power cylinder is fixedly connected with the slide, still fixed mounting has the expansion power cylinder on the slide, and the telescopic end of expansion power cylinder is installed with expansion head, and expansion head is coaxially arranged in the inner chamber of press -mounting head. When work piece is transported to the press -mounting station department, work piece is positioned and is pressed tightly and is clamped, first utilizes press -mounting head and presses tightly bushing, and then utilizes expansion head and rises and rivets bushing, and like this every piece once feed can complete the press -mounting and rise and rivet of oil sprayer bushing, realizes the continuous quick stable production under the premise of guaranteeing product quality, and the press -mounting efficiency is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of engine assembly technology, specifically to an automatic press-fitting device for injector bushings. Background Technology

[0002] The fuel injector bushing in the engine cylinder head is usually made of brass. It is installed by pressing the end face against the cylinder head body, then expanding the small end hole to cause plastic deformation, causing the brass bushing to expand and fill the annular groove in the cylinder head. This achieves its positioning on the cylinder head body and simultaneously seals the water cavity. Currently, the press-fitting process requires manual operation, resulting in low automation and low efficiency. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide an automatic press-fitting device for injector bushings that can complete the press-fitting and riveting of injector bushings in one feed, thereby improving the press-fitting efficiency.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: an automatic press-fitting device for injector bushings, installed at the press-fitting station of a workpiece conveyor line, including a base, a linear guide rail fixedly mounted on the base, a slide plate slidably mounted on the linear guide rail, and a press-fitting head with an inner cavity fixedly mounted on the slide plate; a press-fitting power cylinder for driving the press-fitting head to feed is mounted on the base, and the telescopic end of the press-fitting power cylinder is fixedly connected to the slide plate; an expansion power cylinder is also fixedly mounted on the slide plate, and an expansion head is mounted on the telescopic end of the expansion power cylinder, and the expansion head is coaxially arranged in the inner cavity of the press-fitting head.

[0005] As a preferred technical solution, a rear upright arm and a clamping seat are fixedly installed on the base, and a pull rod is provided between the rear upright arm and the clamping seat.

[0006] As a preferred technical solution, the clamping seat is equipped with a workpiece positioning mechanism and a workpiece clamping mechanism.

[0007] As a preferred technical solution, the press-fit power cylinder is mounted on the rear boom.

[0008] As a preferred technical solution, a pad is fitted onto the pressing head.

[0009] As a preferred technical solution, a limit guide wheel set is provided at the pressing station of the workpiece conveyor line.

[0010] By adopting the above technical solution, this utility model has at least the following beneficial effects: the injector bushing is pre-placed in the bottom hole of the workpiece. When the workpiece is transported to the press-fitting station, the workpiece is positioned and clamped. The press-fitting power cylinder feeds, and the press-fitting head is used to press the bushing and keep it clamped. Then the expansion power cylinder feeds, and the expansion head is used to rivet the bushing. Then, the expansion head is withdrawn, the press-fitting head is withdrawn, the workpiece clamping is loosened, and the workpiece positioning pin is removed in sequence, and the workpiece is transported out of the press-fitting station. In this way, the press-fitting and rivetting of the injector bushing can be completed in one feed for each piece, realizing continuous, fast and stable production while ensuring product quality, and greatly improving the press-fitting efficiency. Attached Figure Description

[0011] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0012] Figure 1 This is a schematic diagram of the main structure of an embodiment of this utility model;

[0013] Figure 2 This is a top view of an embodiment of the present invention.

[0014] Figure 3 This is a schematic diagram of the main structure of an embodiment of the present utility model;

[0015] Figure 4 This is an assembly diagram of the press head and the expansion head;

[0016] Figure 5 This is a reference diagram showing the state of the workpiece when it is positioned and clamped.

[0017] Figure 6 This is a reference diagram showing the state when the injector bushing is pressed together using a press head;

[0018] Figure 7 This is a reference diagram showing the state when the injector bushing is expanded and riveted using an expansion head.

[0019] In the diagram: 1-base; 2-linear guide rail; 3-slide plate; 4-press head; 5-press power cylinder; 6-expansion power cylinder; 7-expansion head; 8-rear arm; 9-clamping seat; 10-workpiece positioning mechanism; 11-workpiece clamping mechanism; 12-limiting guide wheel assembly; 13-pad; 14-injector bushing; 15-workpiece. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0021] like Figures 1 to 4 As shown, an automatic press-fitting device for injector bushings is installed at the press-fitting station of a workpiece conveyor line. It includes a base 1, which assembles all components and collects lubricating oil during operation. A linear guide rail 2 is fixedly mounted on the base 1, and a sliding plate 3 is slidably mounted on the linear guide rail 2. A press-fitting head 4 with an inner cavity is fixedly mounted on the sliding plate 3, and a pad 13 is fitted at the tail end of the press-fitting head 4. A press-fitting power cylinder 5, which drives the press-fitting head 4, is mounted on the base 1. The telescopic end of the press-fitting power cylinder 5 is fixedly connected to the sliding plate 3. An expansion power cylinder 6 is also fixedly mounted on the sliding plate 3. An expansion head 7 is mounted on the telescopic end of the expansion power cylinder 6 and is coaxially arranged within the inner cavity of the press-fitting head 4. The expansion head 7 can extend or retract into the press-fitting head. Preferably, the press-fitting power cylinder 5 and the expansion power cylinder 6 are hydraulic cylinders, but they can also be pneumatic cylinders or electric cylinders, all of which should fall within the protection scope of this utility model.

[0022] refer to Figure 1 and Figure 5 In this embodiment, a rear upright arm 8 and a clamping seat 9 are fixedly installed on the base 1, and the pressing power cylinder 5 is installed on the rear upright arm 8. A workpiece positioning mechanism 10 and a workpiece clamping mechanism 11 are installed on the clamping seat 9. The workpiece positioning mechanism 10 can use a hydraulic pin, and the workpiece clamping mechanism 11 can clamp the workpiece hydraulically. A pull rod 10 is provided between the rear upright arm 8 and the clamping seat 9. The pull rod 10 can increase the system rigidity and form a closed loop of force.

[0023] refer to Figure 2 The workpiece conveying line is equipped with a limit guide wheel group 12 at the pressing station to guide the workpiece, ensuring that the workpiece enters the fixture smoothly and that important surfaces are not scratched.

[0024] refer to Figure 6 and Figure 7The working process is as follows: The injector bushing 14 is pre-placed in the bottom hole of the workpiece 15 (cylinder head). When the workpiece 15 is transported to the press-fitting station, the workpiece is positioned by the pin and clamped by the workpiece clamping mechanism 11. The press-fitting power cylinder 5 feeds in, and the press-fitting head 4 presses the injector bushing 14 and keeps it pressed. Then the expansion power cylinder 6 feeds in, and the expansion head 7 expands the inner hole of the small end of the injector bushing 14. Then, the workpiece is transported out of the press-fitting station after the expansion head 7 is withdrawn, the press-fitting head 4 is withdrawn, the workpiece clamping is released, and the workpiece positioning pin is removed. In this way, the press-fitting and expansion of the injector bushing can be completed in one feed for each piece, realizing continuous, fast and stable production while ensuring product quality, and greatly improving the press-fitting efficiency.

[0025] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes and modifications made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. An automatic press-fitting device for injector bushings, installed at the press-fitting station of a workpiece conveyor line, comprising a base, characterized in that: A linear guide rail is fixedly installed on the base, a slide plate is slidably installed on the linear guide rail, and a pressing head with an inner cavity is fixedly installed on the slide plate; a pressing power cylinder for driving the pressing head to feed is installed on the base, and the telescopic end of the pressing power cylinder is fixedly connected to the slide plate; an expansion power cylinder is also fixedly installed on the slide plate, and an expansion head is installed on the telescopic end of the expansion power cylinder, and the expansion head is coaxially arranged in the inner cavity of the pressing head.

2. The automatic press-fitting device for injector bushings as described in claim 1, characterized in that: A rear upright arm and a clamping seat are fixedly installed on the base, and a pull rod is provided between the rear upright arm and the clamping seat.

3. The automatic press-fitting device for injector bushings as described in claim 2, characterized in that: The clamping base is equipped with a workpiece positioning mechanism and a workpiece clamping mechanism.

4. The automatic press-fitting device for injector bushings as described in claim 2, characterized in that: The press-fit power cylinder is mounted on the rear boom.

5. The automatic press-fitting device for injector bushings as described in claim 1, characterized in that: A pad is fitted onto the pressing head.

6. The automatic press-fitting device for injector bushings as described in any one of claims 1 to 5, characterized in that: The workpiece conveyor line is equipped with a limit guide wheel set at the pressing station.

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