A valve perpendicularity detection device of a multi-station parallel structure

Abstract

The patent application belongs to the technical field of automobile parts, and particularly relates to a valve verticality detection device with a multi-station parallel structure, which comprises a plate-type conveyor, a detection mechanism and a moving assembly. The detection mechanism comprises a plurality of elastic expansion rods arranged in a ring around the valve, one end of each of the elastic expansion rods abutting against the circumferential side wall of the valve, and the other end of each of the elastic expansion rods being provided with a displacement sensor for detecting the moving distance of the elastic expansion rod. Each transmission plate of the plate-type conveyor is provided with a clamp, the clamp comprising a middle ring body and a plurality of clamping plates, one of the clamping plates and the middle ring body being provided with a pushing inlet, the valve being capable of being pushed into the middle ring body through the pushing inlet, the clamping plate pressing the upper end surface of the valve bottom plate and limiting the side wall of the valve bottom plate. Through the cooperation of the plate-type conveyor, the detection mechanism and the moving assembly, the device can realize continuous detection, has high detection efficiency and is suitable for large-scale production of the valve.

Description

Technical Field

[0001] This invention relates to the field of automotive parts testing technology, specifically to a valve verticality testing device with a multi-station parallel structure. Background Technology

[0002] As a core component of the engine, the valve's dimensional accuracy is extremely important. Poor accuracy will affect the engine's overall service life and performance. Among the various dimensions, the verticality of the valve stem, the stem radius, and the radius of the valve base plate are particularly important.

[0003] Currently, the traditional method for inspecting the perpendicularity of valve parts is to manually measure using tools such as V-blocks and dial indicators. This method is not only inefficient and labor-intensive, but also prone to errors due to human factors, and cannot meet the needs of modern production lines for efficient and high-precision inspection.

[0004] In the prior art (publication number CN114383588A), there is a core sample perpendicularity measurement system. This system uses an electric turntable to rotate the core sample and utilizes two displacement sensors arranged vertically to detect the deviation of the core sample's outer wall, thereby calculating the perpendicularity. Although this device achieves automated perpendicularity measurement, it still has the following problems: 1. This solution adopts a single-station design, which can only measure one part at a time, resulting in limited measurement efficiency and making it difficult to adapt to the mass production of parts such as valves; 2. This device is not suitable for measuring critical dimensions such as valve stem radius and base plate radius; 3. The measurement accuracy of this solution depends on the accuracy of the measuring mechanism, and the gaps caused by mechanical wear during long-term use may affect the accuracy of the measurement results. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a valve verticality detection device with a multi-station parallel structure that can continuously test, integrates multiple tests, and has high measurement accuracy.

[0006] The technical solution adopted in this invention is as follows: A valve verticality detection device with a multi-station parallel structure, characterized in that: Includes plate conveyors, testing mechanisms, and moving components; The detection mechanism includes multiple elastic telescopic rods arranged in a ring around the valve. One end of each elastic telescopic rod abuts against the circumferential sidewall of the valve, and the other end of each elastic telescopic rod is equipped with a displacement sensor for detecting the movement distance of the elastic telescopic rod. Each conveyor plate of the plate conveyor is equipped with a clamp, which includes an intermediate ring and multiple clamping plates. The multiple clamping plates are all connected to the intermediate ring and correspond one-to-one with the elastic telescopic rods. The upper end face of the clamping plate is provided with an inclined surface for the elastic telescopic rods to slide. One of the clamping plates is provided with a push-in port that is connected to the intermediate ring. The valve can be pushed into the intermediate ring through the push-in port. The clamping plate presses the upper end face of the valve base plate and limits the side wall of the valve base plate. During testing, the moving component first drives multiple elastic telescopic rods to descend along the valve stem until the elastic telescopic rods are locked on the outer wall of the clamping plate. Then, it drives multiple elastic telescopic rods to rotate, so that the elastic telescopic rods are locked on the side wall of the valve base plate. Finally, it drives multiple elastic telescopic rods to rise to the initial height and rotate back to the initial angle.

[0007] Working principle: Clamping and transport: The valve can be pushed into the middle ring body along the push inlet. Multiple clamping plates press the upper surface of the valve base plate through their own structure and limit the side wall of the valve base plate. The valve to be tested is transported to the testing station through the plate-type conveyor. The moving component drives the entire ring testing mechanism to descend along the valve stem. Testing Process: During this process, the end of the elastic telescopic rod remains in contact with the valve surface. Displacement sensors continuously record data. As the testing mechanism descends at a constant speed, multiple displacement sensors on the same horizontal plane measure the radius of the valve stem's cross-section (multiple elastic telescopic rods point towards the valve's center; based on the initial value and the value after contact with the valve stem, the radius of the valve stem (and similarly, the valve base plate) can be calculated. When the valve stem is in an ideal state, the value of the elastic telescopic rod will not change during descent after contact with the valve stem). This continues until the elastic telescopic rod moves to contact the clamping plate and slides along the upper surface of the clamping plate to the side wall. Calibration can be performed based on the position of the clamping plate (each time the plate-type transmission machine transmits to...). During the inspection station, theoretically, the outer diameter of the fixture is known. When the elastic telescopic rod is on its side wall, its value corresponds to the outer diameter of the fixture. When the value deviates, it can be determined whether the elastic telescopic rod is worn or affected by temperature. The measured data can be corrected based on this difference. The moving component then drives the elastic telescopic rod to rotate, so that the elastic telescopic rod rests against the side wall of the valve base plate, and the radius of the base plate is measured. The moving component drives the elastic telescopic rod to rise, and the valve stem is measured again from another angle. Based on the readings of each sensor at the same height during the downward and upward processes, if the rod is bent or not perpendicular, there will be an offset in the center of the cross-section at different heights. By analyzing the changes in these offsets, the perpendicularity error can be calculated.

[0008] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. Through the cooperation of plate conveyor, detection mechanism and moving components, this device can achieve continuous detection, high detection efficiency and adapt to the large-scale production of valves.

[0009] 2. The fixture, composed of multiple clamping plates, forms an outer edge that can be measured by the elastic telescopic rod. Each fixture can be used as a reference to calibrate each valve measurement. Combined with two tests on the valve stem, the measurement accuracy is guaranteed.

[0010] 3. Integrating multiple dimensional measurements into a single inspection mechanism enables multi-station parallel operation, improving testing efficiency.

[0011] In a preferred embodiment of the present invention, the push-in port faces upward, and when the valve is held by the clamp, the central axis of the valve is parallel to the horizontal line.

[0012] 4. By setting the inclined surface of the clamping plate, the clamp makes it easier for the elastic telescopic rod to move from the rod body to the base plate (the upper surface of the base plate of a conventional valve is relatively flat, which can easily cause the elastic telescopic rod to jam).

[0013] Beneficial effects: With this structure, when the corresponding valve on the plate conveyor is transported to the lower end of the plate conveyor, its push-in port faces downward, which can realize the automatic unloading of the valve.

[0014] In a preferred embodiment of the present invention, the contact surface between the clamp and the valve is provided with an elastic layer.

[0015] Beneficial effects: By setting up the elastic layer, the elastic layer can adapt to machining errors and clamp the valve more tightly.

[0016] In a preferred embodiment of the present invention, an electromagnet located at the detection station is also included. The electromagnet is disposed on the side of the fixture away from the detection mechanism. When the electromagnet is activated, the suction valve is pressed against the fixture. The elastic telescopic rod is made of non-magnetic material.

[0017] Beneficial effect: During testing, the electromagnet is activated, which further clamps the electromagnet, preventing the valve from shifting due to the influence of the testing components during measurement.

[0018] In a preferred embodiment of the present invention, the movable end of the movable component is fixedly connected to a housing, the housing is provided with a plurality of through holes, the elastic telescopic rod includes a sliding rod and a sliding block, one end of the sliding rod is slidably installed in the through hole, the displacement sensor is disposed on the housing and located on the other side of the through hole, and is used to detect the displacement of the end of the sliding rod, the other end of the sliding rod is fixedly connected to the sliding block, and a compression spring is disposed between the sliding block and the housing, the compression spring being sleeved on the sliding rod.

[0019] Beneficial effects: The above settings facilitate contact between the sliding block and the object being measured. When in contact, the compression spring and sliding rod are forced to move. Then, multiple displacement sensors detect multiple sliding rods to achieve overall radius detection.

[0020] In a preferred embodiment of the present invention, the sliding block is provided with a first top surface and a second top surface that are parallel to each other. The first top surface is used to abut against the side wall of the valve stem body, and the second top surface is used to abut against the side wall of the clamp and the valve base plate. The second top surface is located on the side of the first top surface that is away from the valve.

[0021] Beneficial effect: Through the above settings, the parallel and staggered design of the first and second top surfaces avoids mutual interference between the measuring rod and the base plate. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a first embodiment of the valve verticality detection device with a multi-station parallel structure according to the present invention; Figure 2 This is a schematic diagram of the detection station in Embodiment 1 of the valve verticality detection device with a multi-station parallel structure of the present invention; Figure 3 This is a schematic diagram of the detection mechanism in Embodiment 1 of the valve verticality detection device with a multi-station parallel structure of the present invention; Figure 4 This is a schematic diagram of the valve verticality detection device with a multi-station parallel structure according to the present invention during calibration in Embodiment 1; Figure 5 This is a schematic diagram of the valve bottom plate in Embodiment 1 of the valve verticality detection device with a multi-station parallel structure of the present invention. Figure 6 This is a schematic diagram of the structure of a second embodiment of the valve verticality detection device with a multi-station parallel structure according to the present invention; Figure 7 This is a schematic diagram of the fixture structure of Embodiment 2 of the valve verticality detection device with multi-station parallel structure of the present invention; Figure 8 This is a schematic diagram of the elastic telescopic rod of the valve verticality detection device with a multi-station parallel structure according to the present invention, in Embodiment 3.

[0023] The reference numerals in the attached drawings include: plate conveyor 1, detection mechanism 2, elastic telescopic rod 21, sliding rod 211, sliding block 212, first top abutment surface 2121, second top abutment surface 2122, single detection surface 2123, compression spring 213, displacement sensor 22, housing 23, fixing block 231, moving assembly 3, electric push rod 31, rotary cylinder 32, clamp 4, intermediate ring 41, clamping plate 42, push inlet 43, and valve 5. Detailed Implementation

[0024] Typical embodiments embodying the features and advantages of the present invention will be specifically described in the following description. It should be understood that the present invention can have various variations in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the present invention.

[0025] In the description of this application, the terms "first", "second", etc. are used only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the structure referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0026] Example 1 See Figures 1 to 5 This embodiment provides a valve verticality detection device with a multi-station parallel structure, such as... Figure 1 As shown, it includes a plate-type conveyor 1, a detection mechanism 2, and a moving component 3.

[0027] See Figure 1 The plate conveyor 1 adopts a chain plate structure and is driven by a motor to achieve intermittent motion. Multiple clamps 4 are evenly arranged on the conveyor plate. Each clamp 4 includes an intermediate ring 41 and three clamping plates 42. The clamping plates 42 and the intermediate ring 41 are welded together (or formed as a single piece). One clamping plate 42 has a push-in port 43 that passes through the intermediate ring 41, allowing the valve 5 to be pushed into the intermediate ring 41 along the push-in port 43. The upper end face of the clamping plate 42 has an inclined surface with an inclination angle of 30° to 45° to facilitate the sliding of the elastic telescopic rod 21 of the detection mechanism 2. The inner wall of the clamping plate 42 has an elastic layer (such as rubber or polyurethane material) to increase friction and adaptability with the valve 5.

[0028] See Figure 2 and Figure 3The detection mechanism 2 includes multiple elastic telescopic rods 21. Three fixing blocks 231 with through holes are provided on the housing 23, corresponding one-to-one with the clamping plate 42. Each elastic telescopic rod 21 includes a sliding rod 211, a sliding block 212, and a compression spring 213. One end of the sliding rod 211 is slidably installed in the through hole of the housing 23, and the other end is fixedly connected to the sliding block 212. The compression spring 213 is sleeved on the sliding rod 211, located between the sliding block 212 and the fixing block 231, providing elastic preload. The sliding block 212 has a parallel first abutment surface 2121 and a second abutment surface 2122, with the second abutment surface 2122 located on the side of the first abutment surface 2121 away from the valve 5. The first abutment surface 2121 is used to contact the side wall of the valve 5 stem, and the second abutment surface 2122 is used to contact the outer wall of the clamping plate 42 of the fixture 4 or the side wall of the valve 5 base plate. Displacement sensor 22 is mounted on housing 23, located on the other side of the through hole, and is used to detect the displacement of the end of sliding rod 211. Displacement sensor 22 is a high-precision inductive sensor, and elastic telescopic rod 21 is made of austenitic stainless steel (such as 304 stainless steel) to ensure no magnetic interference.

[0029] See Figure 2 The moving component 3 includes an electric push rod 31 and a rotary cylinder 32. The electric push rod 31 is vertically mounted on a bracket, and the rotary cylinder 32 is fixedly mounted on the moving end of the electric push rod 31. The housing 23 of the detection mechanism 2 is fixedly connected to the rotating end of the rotary cylinder 32. The rotation angle of the rotary cylinder 32 is adjustable from 0° to 90°.

[0030] An electromagnet is installed below the testing station, which can attract the valve 5 through the plate conveyor 1. When the valve 5 is transported to the testing station, the electromagnet is activated, generating a magnetic force to attract the bottom plate of the valve 5, so that the valve 5 is tightly pressed against the fixture 4 to prevent displacement during the measurement process.

[0031] Work process: See Figures 4 to 5 Loading and clamping: Valve 5 is pushed into the middle ring 41 of clamp 4 via push inlet 43 by a robot or manually. Clamping plate 42 presses the upper end face of valve 5 base plate with elastic layer and limits the side wall of valve 5 base plate. Plate conveyor 1 intermittently transports the conveyor plate holding valve 5 to the inspection station.

[0032] Descending the measuring rod: The electric push rod 31 of the moving assembly 3 drives the detection mechanism 2 to descend uniformly along the valve 5 rod. The first top surface 2121 of the elastic telescopic rod 21 remains in contact with the side wall of the valve 5 rod, and the displacement sensor 22 continuously records data. The radius and center position of each cross-section of the valve 5 rod are calculated using the readings from the three displacement sensors 22. During descent, if the rod's verticality is ideal, the sensor readings change smoothly; if bending occurs, the readings will fluctuate. The verticality error is calculated by analyzing the center offset of cross-sections at different heights.

[0033] Calibration and Measurement of the Base Plate: When the elastic telescopic rod 21 descends to the inclined surface of the clamping plate 42, it slides along the inclined surface until the second top abutment surface 2122 abuts against the outer wall of the clamping plate 42. At this time, the displacement sensor 22 records the reading. Since the outer wall dimension of the clamp 4 is known, this reading serves as a calibration reference to compensate for systematic errors caused by factors such as temperature and wear. Subsequently, the rotary cylinder 32 drives the elastic telescopic rod 21 to rotate, causing the second top abutment surface 2122 to abut against the side wall of the valve 5 base plate, and the radius of the base plate is measured.

[0034] Re-measurement upon lifting: The electric push rod 31 drives the detection mechanism 2 to rise, and the first top contact surface 2121 contacts the valve 5 rod body again, re-measuring the rod body radius and perpendicularity from another angle to improve measurement accuracy. Finally, the rotary cylinder 32 resets, and the detection mechanism 2 returns to its initial position.

[0035] Unloading: After the inspection is completed, the electromagnet is de-energized, the plate conveyor 1 moves to the next station, and the valve 5 automatically falls off from the push-in port 43 under the action of gravity.

[0036] Data processing: The data from displacement sensor 22 is transmitted to a PLC or industrial computer, and the radius of valve 5 rod, base plate radius and perpendicularity are calculated by algorithm. The calculation process is well known to those skilled in the art and will not be described in detail here.

[0037] Example 2 See Figure 6 and Figure 7 Based on the first embodiment, the push-in port 43 is set facing upwards. When the valve 5 is clamped by the clamp 4, the central axis of the valve 5 is parallel to the horizontal line. After the test is completed, the electromagnet is de-energized, the plate conveyor 1 moves to the next station, and the valve 5 automatically falls off from the push-in port 43 under the action of gravity.

[0038] In this embodiment, the electromagnet can be set on one side of the clamp 4, above the plate conveyor 1.

[0039] Example 3 See Figure 8Based on the first embodiment, the first top surface 2121 and the second top surface 2122 are combined into a single detection surface 2123. The fixture 4, composed of multiple clamping plates 42, forms an outer edge that can be measured by the elastic telescopic rod 21. Each fixture 4 can be used as a reference to correct each measurement of the valve 5. Combined with two tests on the valve 5 rod, the measurement accuracy is guaranteed.

[0040] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A valve verticality detection device with a multi-station parallel structure, characterized in that: Includes plate conveyors, testing mechanisms, and moving components; The detection mechanism includes multiple elastic telescopic rods arranged in a ring around the valve. One end of each elastic telescopic rod abuts against the circumferential sidewall of the valve, and the other end of each elastic telescopic rod is equipped with a displacement sensor for detecting the movement distance of the elastic telescopic rod. Each conveyor plate of the plate conveyor is equipped with a clamp, which includes an intermediate ring and multiple clamping plates. The multiple clamping plates are all connected to the intermediate ring and correspond one-to-one with the elastic telescopic rods. The upper end face of the clamping plate is provided with an inclined surface for the elastic telescopic rods to slide. One of the clamping plates is provided with a push-in port that is connected to the intermediate ring. The valve can be pushed into the intermediate ring through the push-in port. The clamping plate presses the upper end face of the valve base plate and limits the side wall of the valve base plate. During testing, the moving component first drives multiple elastic telescopic rods to descend along the valve stem until the elastic telescopic rods are stuck on the outer wall of the clamping plate. Then, it drives multiple elastic telescopic rods to rotate, so that the elastic telescopic rods are stuck on the side wall of the valve base plate. Finally, it drives multiple elastic telescopic rods to rise to the initial height and rotate back to the initial angle. It also includes an electromagnet located at the testing station. The electromagnet is set on the side of the fixture away from the testing mechanism. When the electromagnet is activated, the suction valve is pressed against the fixture. The elastic telescopic rod is made of non-magnetic material. With the push-in port facing upwards, when the valve is held by the clamp, the valve's central axis is parallel to the horizontal line; After the test is completed, the electromagnet is de-energized, the plate conveyor moves to the next station, and the valve automatically falls off from the push-in port under the action of gravity.

2. The valve verticality detection device with a multi-station parallel structure according to claim 1, characterized in that: The contact surface between the clamp and the valve is provided with an elastic layer.

3. The valve verticality detection device with a multi-station parallel structure according to claim 1, characterized in that: The movable end of the movable component is fixedly connected to a housing, which has multiple through holes. The elastic telescopic rod includes a sliding rod and a sliding block. One end of the sliding rod is slidably installed in the through hole. The displacement sensor is installed on the housing and located on the other side of the through hole to detect the displacement of the end of the sliding rod. The other end of the sliding rod is fixedly connected to the sliding block. A compression spring is provided between the sliding block and the housing, and the compression spring is sleeved on the sliding rod.

4. The valve verticality detection device with a multi-station parallel structure according to claim 3, characterized in that: The sliding block has a first top surface and a second top surface that are parallel to each other. The first top surface is used to abut against the side wall of the valve stem body, and the second top surface is used to abut against the side wall of the clamp and the valve base plate. The second top surface is located on the side of the first top surface away from the valve.

5. The valve verticality detection device with a multi-station parallel structure according to claim 1, characterized in that: The moving component includes an electric push rod and a rotary cylinder. The rotary cylinder is fixedly installed on the moving end of the electric push rod, and the rotating end of the rotary cylinder is fixedly connected to the detection mechanism.

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