Assembly fixture for camshaft and signal panel of automobile engine

Abstract

The utility model belongs to the technical field of clamps, and particularly relates to an automobile engine camshaft and signal panel assembly clamp which comprises a bottom plate, a horizontal pressure air cylinder, a signal panel positioning plate, a fixed camshaft positioning sleeve and a movable camshaft positioning sleeve. The horizontal pressure cylinder drives the signal panel positioning plate to position and press the signal panel through the positioning groove and the adsorption magnet; the fixed positioning sleeve and the movable positioning sleeve carry out two-point supporting and limiting on the cam shaft through the shaft body containing groove and the cam positioning groove, and precise positioning is achieved in cooperation with the magnetic adsorption device. The position of the movable positioning sleeve can be adjusted through the guide rail and the transmission motor to adapt to different camshafts. According to the utility model, the automatic press-fitting of the signal panel can be realized, the press-fitting process is completed in one step, the assembly steps are reduced, the production efficiency is obviously improved, and the assembly precision and consistency are improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of clamp, specifically relates to a camshaft and signal disc assembly fixture of automobile engine. BACKGROUND

[0002] The assembly of the camshaft and the signal disc of the automobile engine is a key process in engine manufacturing and maintenance, and the assembly precision directly affects the ignition timing, fuel injection control and overall performance of the engine. At present, the traditional assembly method mainly relies on manual operation, and the following problems exist:

[0003] Low assembly precision: manual alignment of the phase angle of the signal disc and the camshaft is prone to error, resulting in inaccurate signal disc output signal and engine abnormal operation.

[0004] Low efficiency: manual adjustment and detection are time-consuming and labor-intensive, especially in the maintenance scene, frequent rework increases maintenance cost.

[0005] Poor consistency: manual assembly is easily affected by the operator's experience, resulting in poor product consistency. INVENTION CONTENTS

[0006] The utility model aims at providing a camshaft and signal disc assembly fixture of automobile engine, which can realize automatic press fitting of the signal disc, complete the press fitting process in one step, reduce the assembly steps, significantly improve the production efficiency, and improve the assembly precision and consistency.

[0007] The technical scheme adopted by the utility model is as follows:

[0008] A camshaft and signal disc assembly fixture of automobile engine, comprising a bottom plate, a horizontal pressure cylinder is fixedly connected to one end of the upper side of the bottom plate, a signal disc positioning plate is connected to the piston rod of the horizontal pressure cylinder, a signal disc positioning groove is formed in the side of the signal disc positioning plate away from the cylinder, a fixed camshaft positioning sleeve is also fixedly connected to the upper side of the bottom plate, an axle body placing groove and a cam positioning groove are formed in the fixed camshaft positioning sleeve, and the cam positioning groove is located on the side close to the signal disc positioning groove.

[0009] Further, a signal disc adsorption magnet is fixedly connected to the signal disc positioning plate, and a cam adsorption magnet is fixedly connected to the inside of the fixed camshaft positioning sleeve.

[0010] Further, an movable camshaft positioning sleeve is also installed on the upper side of the bottom plate, the movable camshaft positioning sleeve is located on the side of the fixed camshaft positioning sleeve away from the signal disc positioning plate, and an axle body placing groove is also formed in the movable camshaft positioning sleeve.

[0011] Further, a guide rail is fixedly connected to the upper side of the bottom plate, and the movable camshaft positioning sleeve is slidingly connected to the upper side of the guide rail.

[0012] Further, the bottom plate upper side is fixedly connected with a guide frame, the inside of the guide frame is horizontally slidably connected with a sliding block, the sliding block is fixedly connected with a movable camshaft positioning sleeve, one end of the guide frame is fixedly connected with a transmission motor, the output end of the transmission motor is fixedly connected with a threaded rod which is threadedly connected with the sliding block.

[0013] Further, another cam positioning groove is formed on the movable camshaft positioning sleeve away from the fixed camshaft positioning sleeve.

[0014] The technical effects achieved by the utility model are:

[0015] The automobile engine camshaft and signal disc assembly fixture of the utility model realizes automatic press fitting of the signal disc through a horizontal pressure cylinder, the press fitting process is completed in one step, the assembly steps are reduced, the production efficiency is remarkably improved, the signal disc positioning groove cooperates with the cam positioning groove, the positioning precision can reach ±0.05mm in combination with the magnetic adsorption device (signal disc adsorption magnet, cam adsorption magnet), the double-point support design of the fixed and movable positioning sleeves ensures that the camshaft shaft body horizontal degree error is small, and the movable positioning sleeve adjusts the position through the guide rail and transmission motor and can be adapted to the camshafts with the length range of 200-400mm. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structural schematic view of the utility model;

[0017] Figure 2 It is a structural schematic view of the utility model in another direction;

[0018] Figure 3 It is a partial enlarged view of the fixed camshaft positioning sleeve of the utility model;

[0019] Figure 4 It is a principle schematic view of the utility model.

[0020] In the drawings, the component list represented by each sign is as follows:

[0021] 1, bottom plate; 2, horizontal pressure cylinder; 3, signal disc positioning plate; 4, signal disc positioning groove; 5, signal disc adsorption magnet; 6, fixed camshaft positioning sleeve; 7, shaft body placing groove; 8, cam positioning groove; 9, cam adsorption magnet; 10, guide rail; 11, guide frame; 12, sliding block; 13, transmission motor; 14, threaded rod; 15, camshaft shaft body; 16, camshaft cam body; 17, signal disc disc body; 18, movable camshaft positioning sleeve. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the utility model more clearly, the following will make specific description of the utility model with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope of the utility model.

[0023] As shown in Figures 1-4 A kind of automobile engine camshaft and signal disc assembly fixture, including bottom plate 1, one end of the upper side of the bottom plate 1 is fixedly connected with horizontal pressure cylinder 2, the piston rod of the horizontal pressure cylinder 2 is fixedly connected with signal disc positioning plate 3, the horizontal pressure cylinder 2 is used to drive signal disc positioning plate 3 to move, the side of signal disc positioning plate 3 away from horizontal pressure cylinder 2 is equipped with signal disc positioning groove 4, signal disc disc body 17 can be placed in the inside of signal disc positioning groove 4, to position signal disc disc body 17, and signal disc positioning plate 3 can also be fixedly connected with signal disc adsorption magnet 5, for the magnetic adsorption of signal disc disc body 17;Wherein the output pressure of horizontal pressure cylinder 2 is 5kN, stroke is 50mm, response time is 0.5s, transmission motor power is 200W, adjustment accuracy is ±0.1mm, magnetic adsorption force signal disc adsorption magnet suction force ≥10N, cam adsorption magnet suction force ≥15N;

[0024] As shown in Figures 1-4 The upper side of the bottom plate 1 is also fixedly connected with fixed camshaft positioning sleeve 6, the fixed camshaft positioning sleeve 6 is equipped with shaft body placing groove 7, the shaft body placing groove 7 is a U-shaped opening area, the camshaft shaft body 15 can be placed in the inside of shaft body placing groove 7, the side of the fixed camshaft positioning sleeve 6 close to signal disc positioning groove 4 is equipped with cam positioning groove 8, when camshaft shaft body 15 is placed in the inside of shaft body placing groove 7, one of camshaft cam body 16 is positioned in the inside of cam positioning groove 8, when horizontal pressure cylinder 2 pushes signal disc positioning plate 3, signal disc positioning plate 3 is driven to move horizontally, when signal disc positioning plate 3 and camshaft shaft body 15 contact, signal disc positioning plate 3 and fixed camshaft positioning sleeve 6 can respectively exert opposite force on signal disc disc body 17 and camshaft cam body 16, until signal disc disc body 17 is assembled on the outside of camshaft shaft body 15 under the action of pressure, i.e. the sleeve work of camshaft shaft body 15 and signal disc disc body 17 can be completed, then reset signal disc positioning plate 3, and the camshaft after sleeve work is completed can be disassembled, which can simply and quickly complete the sleeve work of camshaft.

[0025] The same as signal disc positioning plate 3 is that the inside of the fixed camshaft positioning sleeve 6 can be fixedly connected with cam adsorption magnet 9, for the magnetic adsorption positioning of camshaft cam body 16.

[0026] As shown in Figures 2-4As shown, the bottom plate 1 upper side is also mounted with movable camshaft positioning sleeve 18, the movable camshaft positioning sleeve 18 is located on the side of the fixed camshaft positioning sleeve 6 away from the signal disc positioning plate 3, the movable camshaft positioning sleeve 18 is also provided with shaft body placing groove 7, at this time, the camshaft shaft body 15 can be placed horizontally in the two shaft body placing grooves 7, two-point positioning is carried out on the shaft body placing groove 7, so that the shaft body placing groove 7 can be simply and stably placed.

[0027] Moreover, the movable camshaft positioning sleeve 18 can be fixedly connected on the upper side of the bottom plate 1, or can be movably connected on the upper side of the bottom plate 1, so that the movable camshaft positioning sleeve 18 can be staggered with the camshaft cam body 16, and specifically, a guide rail 10 is fixedly connected on the upper side of the bottom plate 1, the movable camshaft positioning sleeve 18 is slidably connected on the upper side of the guide rail 10, so that the position of the movable camshaft positioning sleeve 18 can be freely adjusted.

[0028] The upper side of the bottom plate 1 can also be fixedly connected with a guide frame 11, a sliding block 12 is horizontally and slidably connected in the guide frame 11, the sliding block 12 is fixedly connected with the movable camshaft positioning sleeve 18, one end of the guide frame 11 is fixedly connected with a transmission motor 13, the output end of the transmission motor 13 is fixedly connected with a threaded rod 14 which is threadedly connected with the sliding block 12, at this time, the transmission motor 13 is started to drive the threaded rod 14 to rotate, so as to drive the sliding block 12 to move horizontally, thereby effectively controlling the position of the movable camshaft positioning sleeve 18.

[0029] Meanwhile, another cam positioning groove 8 can be formed on the side of the movable camshaft positioning sleeve 18 away from the fixed camshaft positioning sleeve 6, at this time, as shown in the figure, Figure 4 The fixed camshaft positioning sleeve 6 and the movable camshaft positioning sleeve 18 respectively clamp the two camshaft cam bodies 16 from the sides of the two camshaft cam bodies 16 close to each other, so as to horizontally position the camshaft shaft body 15.

[0030] Working process: camshaft placement: the two ends of the camshaft shaft body 15 are respectively placed in the shaft body placing grooves 7 of the fixed positioning sleeve 6 and the movable positioning sleeve 18, two-point support ensures horizontal stability.

[0031] Signal disc positioning: the signal disc body 17 is preliminarily positioned by the signal disc positioning groove 4, and is fixed by the adsorbing magnet 5 to prevent deviation.

[0032] Movable sleeve adjustment: the transmission motor 13 is started to drive the threaded rod 14 to drive the sliding block 12 to move along the guide rail 10, and the movable positioning sleeve 18 is adjusted to a position suitable for the length of the camshaft, such as adjusting the stroke of 0-200mm.

[0033] Pressing execution: horizontal pressure cylinder 2 pushes signal disc positioning plate 3 to press the signal disc to the specified position of camshaft shaft body 15 with constant pressure such as 5kN, and the pressing stroke is 50mm for example.

[0034] Magnetic auxiliary positioning: cam suction magnet 9 sucks camshaft cam body 16 to ensure that the phase angle error is less than or equal to 0.5° during the pressing process.

[0035] Adaptation range: camshaft length: 200-400mm, signal disc diameter: Φ80-Φ150mm.

[0036] The assembly time of a single piece is shortened from 10 minutes to 3 minutes, and is suitable for batch production scenes.

[0037] After assembly, 100 samples are detected, the phase angle error is controlled within ±0.5°, the qualified rate is improved to 98%, and the qualified rate of the traditional method is 85%.

[0038] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled persons in the art, without departing from the principle of the present application, a number of improvements and refinements can be made, and these improvements and refinements should be considered as the protection range of the present application. The structures, devices and operation methods not specifically described and explained in the present application are implemented according to the conventional means in the art, unless otherwise specified and limited.

Claims

1. An automotive engine camshaft and signal disc assembly fixture, characterized by: The utility model relates to a signal disk positioning device, including bottom plate (1), one end fixed connection horizontal pressure air cylinder (2) on the bottom plate (1) upside, the piston rod of horizontal pressure air cylinder (2) connects signal disk positioning plate (3), signal disk positioning plate (3) is set up signal disk positioning groove (4) on the side away from air cylinder, still fixed connection fixed camshaft positioning sleeve (6) on the bottom plate (1), fixed camshaft positioning sleeve (6) is set up shaft body placing groove (7) and cam positioning groove (8), cam positioning groove (8) is located close to signal disk positioning groove (4) one side.

2. An assembly fixture for a camshaft and signal disc of an automotive engine according to claim 1, characterized in that: Signal disk adsorption magnet (5) is fixedly connected on signal disk positioning plate (3), and cam adsorption magnet (9) is fixedly connected in fixed camshaft positioning sleeve (6).

3. An assembly fixture for a camshaft and signal disc of an automotive engine as claimed in claim 1, wherein: The upside of bottom plate (1) is also provided with movable camshaft positioning sleeve (18), and the movable camshaft positioning sleeve (18) is located on the side, away from signal disk positioning plate (3), of fixed camshaft positioning sleeve (6), and the movable camshaft positioning sleeve (18) is also provided with shaft body placing groove (7) on it.

4. An assembly fixture for a camshaft and signal disc of an automotive engine according to claim 3, characterized in that: The upside of bottom plate (1) is fixedly connected with guide rail (10), and the movable camshaft positioning sleeve (18) is slidingly connected on the upside of guide rail (10).

5. An assembly fixture for a camshaft and signal disc of an automotive engine according to claim 4, characterized in that: The upside of bottom plate (1) is fixedly connected with guide frame (11), the inside of guide frame (11) is horizontally slidingly connected with sliding block (12), the sliding block (12) is fixedly connected with movable camshaft positioning sleeve (18), one end of guide frame (11) is fixedly connected with transmission motor (13), the output end of transmission motor (13) is fixedly connected with threaded rod (14) which is screw-connected with sliding block (12).

6. An assembly fixture for a camshaft and signal disc of an automotive engine according to claim 5, characterized in that: Another cam positioning groove (8) is set up on the side, away from fixed camshaft positioning sleeve (6), of movable camshaft positioning sleeve (18).

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