Valve seat ring missing prevention and detection mechanism

Abstract

The utility model discloses a valve seat circle missed loading mistake proofing detection mechanism is provided at the detection station of workpiece conveying line, including the support frame of striding on workpiece conveying line top, installable lifting detection support on the support frame, be provided with the positioning pin on the detection support, and the detection support is connected with lifting drive mechanism, the detection support is installed with the detection pressure head corresponding with the valve seat circle on workpiece, and the detection pressure head is above the detection support and is equipped with the proximity switch cooperation. If the valve seat circle has been installed normally, the proximity switch sends a signal, and confirms that the position is normal through lifting drive mechanism and drives the detection pressure head to move down. If the valve seat circle is not installed, the proximity switch will not send a signal, so that the on -the -spot operator and inspector can detect the missed loading workpiece quickly on the spot through the detection mechanism and carry out the rework, and the quality problem caused by the outflow of unqualified products is avoided.

Description

Technical Field

[0001] This utility model relates to the field of engine assembly technology, specifically to a valve seat ring misinstallation prevention and error detection mechanism. Background Technology

[0002] During the mass production of cylinder heads, valve seats are typically installed using an automated pressing method. While the pressing equipment is fully automated, problems can occasionally occur due to issues in any of the following stages: material shortage detection in the hopper and conveyor, or the stability of the pressing head's gripping of the valve seat. If these defective products reach customers, they not only severely disrupt their production processes but also seriously damage the supplier's reputation for quality. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a valve seat ring missing installation error prevention detection mechanism that can quickly detect missing workpieces and prevent defective products from flowing out and causing quality problems.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a valve seat misinstallation prevention and error detection mechanism, which is set at the detection station of the workpiece conveyor line, including a support frame spanning above the workpiece conveyor line, a liftable detection bracket installed on the support frame, a positioning pin provided on the detection bracket, and a lifting drive mechanism connected to the detection bracket; a detection pressure head corresponding to the valve seat on the workpiece is floatingly installed on the detection bracket, and a proximity switch is provided on the detection bracket above the detection pressure head.

[0005] As a preferred technical solution, the detection bracket is provided with a positioning pin.

[0006] As a preferred technical solution, the testing bracket is equipped with an upper base plate and a lower base plate arranged in parallel.

[0007] As a preferred technical solution, the proximity switch is fixedly installed on the upper base plate, a sliding sleeve is fixedly installed on the lower base plate, the detection head is fixedly connected to a detection rod, and the detection rod slides in cooperation with the sliding sleeve; a compression spring is fitted on the detection rod between the detection head and the sliding sleeve.

[0008] As a preferred technical solution, the lifting drive mechanism is a power cylinder.

[0009] As a preferred technical solution, the power cylinder is equipped with a stroke control switch, and the control stroke of the power cylinder is the sum of the compression stroke of the compression spring and the sensing distance of the proximity switch.

[0010] As a preferred technical solution, the outer wall of the sliding sleeve is provided with fixing wings, and the sliding sleeve is fixedly connected to the lower base plate by screws.

[0011] As a preferred technical solution, the proximity switch is connected to an indicator light.

[0012] By adopting the above technical solution, this utility model has at least the following beneficial effects: The lifting drive mechanism moves the detection head downwards. If the valve seat is properly installed, the detection head will stop moving downwards after contacting the end face of the seat. Its upper end will then signal the proximity switch that continues downwards, confirming that this position is normal. Conversely, if the valve seat is not installed, the detection head will not contact the end face of the seat, and its upper end will not signal the proximity switch that continues downwards to the end of its stroke. This allows on-site operators and inspectors to quickly detect missing parts on-site using this detection mechanism and perform rework, preventing defective products from leaking out and causing quality problems. Attached Figure Description

[0013] The following figures are intended only to illustrate and explain the present invention and do not limit the scope of the present invention. Wherein:

[0014] Figure 1 This is a schematic diagram of the main structure of an embodiment of this utility model;

[0015] Figure 2 This is a schematic diagram of the left-side structure of an embodiment of the present invention;

[0016] Figure 3 This is a status reference diagram during online detection;

[0017] Figure 4 This is an assembly diagram of the sliding sleeve in an embodiment of this utility model.

[0018] In the diagram: 1-Workpiece conveyor line; 2-Support frame; 3-Detection bracket; 31-Upper base plate; 32-Lower base plate; 33-Adjustment hole; 4-Positioning pin; 5-Lifting drive mechanism; 6-Workpiece; 7-Valve seat ring; 8-Detection pressure head; 9-Proximity switch; 10-Indicator light; 11-Sliding sleeve; 12-Detection rod; 13-Compression spring; 14-Fixing wing; 15-Screw. Detailed Implementation

[0019] 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.

[0020] like Figures 1 to 3As shown, a valve seat misinstallation prevention and error detection mechanism is installed at the detection station of the workpiece conveyor line 1 (conveyor roller conveyor). It includes a support frame 2 spanning above the workpiece conveyor line 1, on which a liftable detection bracket 3 is mounted. The detection bracket 3 is equipped with positioning pins 4 for positioning during operation and ensuring accuracy. The detection bracket 3 is connected to a lifting drive mechanism 5. In this embodiment, the lifting drive mechanism 5 is a cylinder, but it can also be a hydraulic cylinder or an electric cylinder, all of which should fall within the protection scope of this utility model. A detection pressure head 8 is floatingly mounted on the detection bracket 3. The detection pressure head 8 is machined according to the actual shape and height of the valve seat 7, and its position is at four locations, corresponding to the seat press-fit position on the workpiece 6 (cylinder head). Proximity switches 9 are respectively installed on the detection bracket 3 above the detection pressure heads 8, and the proximity switches 9 are connected to indicator lights 10.

[0021] refer to Figure 2 In this embodiment, the detection bracket 3 is equipped with an upper base plate 31 and a lower base plate 32 arranged in parallel. The proximity switch 9 is fixedly installed on the upper base plate 31, and a sliding sleeve 11 is fixedly installed on the lower base plate 32. The detection head 8 is fixedly connected to a detection rod 12, and the detection rod 12 slides in cooperation with the sliding sleeve 11. A compression spring 13 is fitted on the detection rod 12 between the detection head 8 and the sliding sleeve 11. For convenient automatic detection, the cylinder is equipped with a stroke control switch, and the cylinder stroke H is equal to the sum of the compression stroke H1 of the compression spring 13 and the sensing distance H2 of the proximity switch 9.

[0022] refer to Figure 4 The outer wall of the sliding sleeve 11 is provided with a fixing wing 14, and the sliding sleeve 11 is fixedly connected to the lower base plate 32 by screws 15.

[0023] refer to Figure 2 and Figure 3 The specific testing methods are as follows:

[0024] (1) The assembled workpiece 6 is automatically conveyed to the inspection station by the conveyor rollers and stopped by the material blocking mechanism;

[0025] (2) The pressure head 8 is moved down by the cylinder, and the positioning pin 4 is used to ensure the accuracy.

[0026] (3) The detection head 8 continues to move down: If the valve seat 7 has been installed normally, the detection head 8 will stop moving down after contacting the end face of the seat. Under the action of the compression spring 13, the detection rod 12 at its top and the proximity switch 9 that continues to move down will send a signal to confirm that this position is normal.

[0027] Conversely, if the valve seat 7 is not installed, the detection head 8 will not contact the end face of the seat, and the detection rod 12 at its top will not send a signal to the proximity switch that continues to descend to the end of the cylinder stroke.

[0028] (4) The signals from the four detection positions are processed and judged by the PLC, and the information is transmitted to the machine tool alarm device. If there is no signal at any detection position, it is logically judged as unqualified.

[0029] (5) When the cylinder reaches the end of its stroke, the stroke control switch sends a signal to complete the detection action. The cylinder returns to its original position. The original position signal of the cylinder, combined with the qualified signal of no missing parts, indicates that the material blocking mechanism can release the material and the work cycle ends.

[0030] If a workpiece is found to be defective, an alarm will sound, the indicator light above proximity switch 9 will illuminate red (10), and the material will be stopped from moving. This allows on-site operators and inspectors to quickly detect missing workpieces on-site and rework them, preventing defective products from leaking out and causing quality problems.

[0031] 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. A valve seat misinstallation prevention and error detection mechanism, installed at the detection station of the workpiece conveyor line, characterized in that: The device includes a support frame spanning above the workpiece conveyor line, on which a liftable detection bracket is mounted, and the detection bracket is connected to a lifting drive mechanism; a detection pressure head corresponding to the valve seat ring on the workpiece is floatingly mounted on the detection bracket, and a proximity switch is provided on the detection bracket above the detection pressure head.

2. The valve seat misinstallation prevention and error detection mechanism as described in claim 1, characterized in that: The testing bracket is equipped with positioning pins.

3. The valve seat misinstallation prevention and error detection mechanism as described in claim 1, characterized in that: The testing bracket is equipped with an upper base plate and a lower base plate arranged in parallel.

4. The valve seat misinstallation prevention and error detection mechanism as described in claim 3, characterized in that: The proximity switch is fixedly installed on the upper base plate, and a sliding sleeve is fixedly installed on the lower base plate. The detection head is fixedly connected to a detection rod, and the detection rod slides in cooperation with the sliding sleeve. A compression spring is fitted on the detection rod between the detection head and the sliding sleeve.

5. The valve seat misinstallation prevention and error detection mechanism as described in claim 4, characterized in that: The lifting drive mechanism is a power cylinder.

6. The valve seat misinstallation prevention and error detection mechanism as described in claim 5, characterized in that: The power cylinder is equipped with a stroke control switch, and the control stroke of the power cylinder is the sum of the compression stroke of the compression spring and the sensing distance of the proximity switch.

7. The valve seat misinstallation prevention and error detection mechanism as described in claim 4, characterized in that: The outer wall of the sliding sleeve is provided with fixing wings, and the sliding sleeve is fixedly connected to the lower base plate by screws.

8. The valve seat misinstallation prevention and error detection mechanism as described in any one of claims 2 to 7, characterized in that: The proximity switch is connected to an indicator light.

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