Engine air valve projection amount detection tool

Abstract

The utility model provides an engine air valve protruding amount detection gauge, and relates to the technical field of engine detection tools. The engine air valve protruding amount detection gauge comprises a support assembly, a measuring assembly and a plurality of adjusting screws. The support assembly comprises a middle connecting shaft and a plurality of supporting arms arranged in the circumferential direction of the middle connecting shaft, the adjusting screws are installed on the supporting arms in a one-to-one correspondence mode, each adjusting screw is provided with an arc face, and during measurement, the arc faces make point contact with a gasket pressing face of a cylinder cover, so that a measurement datum plane is positioned, and measurement precision is improved. As the pressure surface of the gasket is contacted in a point contact manner, the contact area is small, so that the cleaning requirement on the pressure surface of the gasket can be reduced, and the accuracy of a measurement reference is ensured. The measuring assembly is installed on the support assembly, the measuring assembly is provided with a measuring head, and the measuring head makes contact with the engine air valve, so that the protruding amount of the engine air valve is measured.

Description

Technical Field

[0001] This utility model relates to the field of engine testing tools, and more specifically, to a gauge for detecting the protrusion of engine valves. Background Technology

[0002] Valve components are an important part of the engine cylinder unit; they include intake valves and exhaust valves, with most engines currently using two intake valves and two exhaust valves per cylinder. The cylinder is composed of the valve disc bottom, cylinder head fire face, cylinder liner inner bore, and piston top. During engine operation, high-temperature, high-pressure combustion gases are generated inside the cylinder. The intake and exhaust valves open and close according to the valve timing. During valve seating, the valve cone surface is subjected to impact forces, and simultaneously, the high-temperature combustion gases continuously erode the valve cone surface as they communicate with the intake manifold, further accelerating wear and affecting valve lifespan and reliability. To mitigate these risks, regular inspection and maintenance are necessary, with replacement as needed. A valve protrusion measurement tool can quickly measure valve protrusion without disassembling the valve component, revealing the wear condition of the valve cone surface and providing a reference for valve replacement.

[0003] Existing gauges for measuring the protrusion of engine valves, such as Figure 1 As shown, the measuring tool uses the plane of the protrusion 2 on the bracket 1 as the measurement reference. During the measurement process, it is placed on the cylinder head gasket pressure surface, using a surface-to-surface contact method. At the same time, four dial indicators 3 are fixedly installed on the bracket 1. The protrusion of the four valves on the cylinder is measured by the four dial indicators. However, the inventor found that this measuring tool has the following problems: ①. The measurement reference is measured by a surface-to-surface contact method. The cylinder head gasket pressure surface in contact with it needs to be cleaned of the charred material. The contact area is large and there are blind spots in the cleaning, which is time-consuming and laborious. It cannot be guaranteed to be completely cleaned, and there is a risk that the measurement reference is not accurate enough; ②. A dial indicator is set for each valve to measure. There are too few measuring points to indicate the protrusion of the valve bottom surface. It cannot accurately reflect the valve wear, and there is a risk of inaccurate measurement results; ③. The bracket is a one-piece structure, which is not conducive to storage and carrying. Utility Model Content

[0004] The purpose of this invention is to provide an engine valve protrusion detection fixture, which can improve at least one of the above-mentioned technical problems.

[0005] The embodiments of this utility model can be implemented in the following ways:

[0006] An engine valve protrusion measurement fixture, comprising:

[0007] A support assembly, wherein the supports include an intermediate connecting shaft and a plurality of support arms arranged circumferentially around the intermediate connecting shaft;

[0008] Multiple adjusting screws are mounted one-to-one on the multiple support arms, and each adjusting screw has an arc surface. This arc surface is used to make point contact with the gasket surface of the cylinder head during measurement to position the measurement reference surface; and

[0009] A measuring component is mounted on the bracket assembly and has a measuring head for contacting the engine valve to measure the amount of protrusion of the engine valve.

[0010] Optionally, the engagement height between the adjusting screw and the support arm is adjustable to adjust the height of the arcuate surface relative to the bracket assembly.

[0011] Optionally, the engine valve protrusion measuring gauge further includes a level mounted on the bracket assembly, the level being used to detect whether the arc surfaces of the plurality of adjusting screws are on the same horizontal plane.

[0012] Optionally, the measuring component includes a mounting structure and a dial indicator mounted on the mounting structure, the mounting structure being rotatably engaged with the intermediate connecting shaft to drive the dial indicator to rotate around the intermediate connecting shaft; the dial indicator has the measuring head.

[0013] Optionally, the mounting structure includes a measuring guide sleeve, a locking clamp, and fasteners. The measuring guide sleeve includes a sleeve portion and a mounting rod portion fixedly connected to the sleeve portion. The sleeve portion is sleeved on the intermediate connecting shaft. The locking clamp is mounted on the mounting rod portion and holds the dial indicator. The fasteners are mounted on the locking clamp to lock the locking clamp.

[0014] Optionally, the mounting structure is height-adjustable with the intermediate connecting shaft, and a limiting stage is provided on the intermediate connecting shaft. The limiting stage is used to abut against the mounting structure to limit the lower stop point of the measuring component.

[0015] Optionally, the number of dial gauges is at least two, and the at least two dial gauges are distributed at different radial positions on the intermediate connecting shaft.

[0016] Optionally, the bracket assembly further includes a bracket portion and fastening screws, the bracket portion being detachably connected to the intermediate connecting shaft via the fastening screws; the bracket portion having the plurality of support arms.

[0017] Optionally, the support portion includes a first support rod and a second support rod, with the middle portions of the first support rod and the second support rod overlapping each other, and the fastening screw passing through the middle portions of the first support rod and the second support rod and then screwed and fixed to the intermediate connecting shaft; the two ends of the first support rod and the two ends of the second support rod respectively form the support arms.

[0018] Optionally, the first support rod has a first groove in its middle portion, and the second support rod has a second groove in its middle portion. The first groove and the second groove engage to restrict the relative rotation of the first support rod and the second support rod.

[0019] The beneficial effects of the engine valve protrusion detection fixture provided by the embodiments of this utility model include:

[0020] This utility model provides an engine valve protrusion detection fixture, which includes a bracket assembly, a measuring assembly, and multiple adjusting screws. The bracket assembly includes a central connecting shaft and multiple support arms circumferentially arranged around the central connecting shaft. The multiple adjusting screws are correspondingly mounted on the support arms, and each adjusting screw has an arc-shaped surface. During measurement, the arc-shaped surface makes point contact with the gasket pressure surface of the cylinder head, thereby positioning the measurement reference surface. Because the contact with the gasket pressure surface is done through point contact, the contact area is small, thus reducing the cleaning requirements of the gasket pressure surface and ensuring the accuracy of the measurement reference. The measuring assembly is mounted on the bracket assembly and has a measuring head. The measuring head contacts the engine valve to measure the protrusion of the engine valve. Attached Figure Description

[0021] The above-described features and advantages of this invention can be better understood after reading the following detailed description of the embodiments of this disclosure in conjunction with the accompanying drawings. In the drawings, the components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0022] Figure 1 A schematic diagram of the structure of a gauge for measuring the protrusion of engine valves provided in the prior art is shown.

[0023] Figure 2 A schematic diagram of the structure of an engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0024] Figure 3 A schematic diagram of the cooperation structure between the bracket assembly and the adjusting screw in an engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0025] Figure 4An exploded structural diagram of the bracket assembly in the engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0026] Figure 5 A cross-sectional structural schematic diagram of the bracket assembly in the engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0027] Figure 6 A schematic diagram of the structure of the adjusting screw in the engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0028] Figure 7 A schematic diagram of the structure of the measuring component in the engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0029] Figure 8 A cross-sectional structural schematic diagram of the measuring component in an engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0030] Figure 9 A schematic diagram of the assembly of the measuring components in the engine valve protrusion measuring fixture provided according to one aspect of the present invention is shown.

[0031] Figure label:

[0032] 10-Engine valve protrusion measuring gauge; 100-Bracket assembly; 110-Intermediate connecting shaft; 111-Limiting platform; 112-Threaded hole; 120-Bracket part; 121-First bracket rod; 122-First groove part; 123-First through hole; 124-Second bracket rod; 125-Second groove part; 126-Second through hole; 127-Mounting hole; 128-First support arm; 129-Second support arm; 130-Level; 140-Fastening screw; 200-Adjusting screw; 210-Arc surface; 220-Adjusting nut; 300-Measuring assembly; 310-Mounting structure; 311-Sleeve part; 312-Mounting rod part; 313-Clip; 314-First clamping part; 315-Second clamping part; 316-Fastener; 317-First fastener; 318-Second fastener; 320-Dial indicator; 321 - Measuring head;

[0033] 20-Cylinder head; 21-Gasket pressure surface; 22-Valve;

[0034] 30-Platform. Detailed Implementation

[0035] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0036] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0038] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] Figure 2 This is a schematic diagram of the engine valve protrusion measuring fixture 10 provided in this embodiment. Figure 3 This is a schematic diagram of the mating structure between the bracket assembly 100 and the adjusting screw 200 in the engine valve protrusion measuring fixture 10 provided in this embodiment. Please refer to the diagram. Figure 2 and Figure 3 This embodiment provides an engine valve protrusion measuring fixture 10, which includes a bracket assembly 100, a measuring component 300, and multiple adjusting screws 200. The bracket assembly 100 includes a central connecting shaft 110 and multiple support arms circumferentially arranged around the central connecting shaft 110. The multiple adjusting screws 200 are correspondingly mounted on the multiple support arms, and each adjusting screw 200 has an arc surface 210. During measurement, the arc surface 210 makes point contact with the gasket pressure surface 21 of the cylinder head 20, thereby positioning the measurement reference surface. Because the contact with the gasket pressure surface 21 is done through point contact, the contact area is small, thus reducing the cleaning requirements for the gasket pressure surface 21 and ensuring the accuracy of the measurement reference. The measuring component 300 is mounted on the bracket assembly 100 and has a measuring head 321. The measuring head 321 contacts the engine valve 22 to measure the protrusion of the engine valve 22.

[0040] The engine valve protrusion measuring fixture 10 provided in this embodiment will be further described below:

[0041] Figure 4 This is an exploded structural diagram of the bracket assembly 100 in the engine valve protrusion measuring fixture 10 provided in this embodiment. Figure 5 This is a cross-sectional structural diagram of the bracket assembly 100 in the engine valve protrusion measuring fixture 10 provided in this embodiment. Please refer to the diagram. Figures 2-5 In this embodiment, the support assembly 100 includes an intermediate connecting shaft 110, a support portion 120, and fastening screws 140. The support portion 120 is detachably connected to the intermediate connecting shaft 110 via the fastening screws 140, and the support portion 120 has multiple support arms. Specifically, the support portion 120 is cross-shaped, and the intermediate connecting shaft 110 is detachably connected to the staggered position at the center of the support portion 120. Thus, the four ends of the support portion 120 form support arms circumferentially distributed around the intermediate connecting shaft 110. That is, in this embodiment, the support assembly 100 has four support arms. Since three points can define a plane, it is understood that in some other embodiments, the number of support arms can be set to three or more as needed, for example, three or five support arms.

[0042] Furthermore, the support portion 120 includes a first support rod 121 and a second support rod 124. The middle portions of the first support rod 121 and the second support rod 124 overlap, and the fastening screw 140 passes through the middle portions of the first support rod 121 and the second support rod 124 and is screwed and fixed to the intermediate connecting shaft 110. The two ends of the first support rod 121 and the two ends of the second support rod 124 respectively form support arms.

[0043] Specifically, the first support rod 121 and the second support rod 124 are square rods. The first support rod 121 has a first through hole 123 in its middle, and the second support rod 124 has a second through hole 126 in its middle. The intermediate connecting shaft 110 is a cylindrical rod with a threaded hole 112 coaxially arranged at one end. The fastening screw 140 passes through the first through hole 123 and the second through hole 126 and is screwed into the threaded hole 112, thereby fixing the first support rod 121 and the second support rod 124 to one end of the intermediate connecting shaft 110. The support arm includes a first support arm 128 formed by the two ends of the first support rod 121 and a second support arm 129 formed by the two ends of the second support rod 124.

[0044] Furthermore, the first support rod 121 has a first groove 122 in its middle portion, and the second support rod 124 has a second groove 125 in its middle portion. The first groove 122 and the second groove 125 engage to restrict the relative rotation of the first support rod 121 and the second support rod 124. Specifically, the structure of the first support rod 121 is the same as that of the second support rod 124, except that the first groove 122 of the first support rod 121 is located on the upper side of the first support rod 121, and the second groove 125 of the second support rod 124 is located on the lower side of the second support rod 124. The first groove 122 is a through slot extending through the first support rod 121 along its width direction, and the dimension of the first groove 122 in the length direction of the first support rod 121 is the same as the dimension in the width direction of the second support rod 124. Thus, the second support rod 124 can be embedded in the first groove 122 to restrict the rotation of the second support rod 124 relative to the first support rod 121. Similarly, the second groove 125 is a through slot extending through the second support rod 124 along its width direction, and the dimension of the second groove 125 in the length direction of the second support rod 124 is the same as the dimension in the width direction of the first support rod 121. Thus, the first support rod 121 can be embedded in the second groove 125.

[0045] It should be noted that in this embodiment, both the first support rod 121 and the second support rod 124 are provided with grooves. By engaging the first groove 122 and the second groove 125, the height difference between the adjusting screw 200 installed on the first support arm 128 and the adjusting screw 200 installed on the second support arm 129 can be effectively reduced. It is understood that in some other embodiments, grooves may be provided only on the first support rod 121 or only on the second support rod 124 as needed.

[0046] In this embodiment, the support arm is also provided with mounting holes 127 for mounting adjusting screws 200. Specifically, since the bracket assembly 100 in this embodiment has four support arms, it also has four adjusting screws 200. It is understood that in other embodiments, the number of adjusting screws 200 can be set as needed. The specific dimensions of the mounting hole 127 from the intermediate connecting shaft 110 are determined according to the dimensions of the gasket pressure surface 21 of the cylinder head 20, so that the adjusting screws 200 installed in the mounting hole 127 can make point contact with the gasket pressure surface 21 of the cylinder head 20.

[0047] Figure 6 This is a schematic diagram of the structure of the adjusting screw 200 in the engine valve protrusion measuring fixture 10 provided in this embodiment during installation. Figure 6 The downward arrow indicates the installation direction of the adjusting screw 200. Please refer to the reference. Figures 2-6Furthermore, the engagement height between the adjusting screw 200 and the support arm is adjustable to adjust the height of the arc surface 210 relative to the bracket assembly 100. Specifically, the lower end face of the adjusting screw 200 is the arc surface 210. The mounting hole 127 has threads, and the adjusting screw 200 is screwed into the mounting hole 127. By turning the adjusting screw 200, the screwed position can be adjusted, thereby driving the arc surface 210 to rise or fall. Optionally, the adjusting screw 200 is also provided with an adjusting nut 220. After the position of the adjusting screw 200 is adjusted, the adjusting screw 200 can be locked by the adjusting nut 220. By adjusting the adjusting nut 220, the arc surfaces 210 of multiple adjusting screws 200 are made to be at the same horizontal height, thereby ensuring that during measurement, the multiple arc surfaces 210 make point contact with the gasket pressure surface 21 of the cylinder head 20 to smoothly position the reference surface to the gasket pressure surface 21 of the cylinder head 20.

[0048] Furthermore, the engine valve protrusion measuring gauge 10 also includes a level 30 mounted on the bracket assembly 100. This level 30 can detect whether the arc surfaces 210 of the multiple adjusting screws 200 are all on the same horizontal plane. Specifically, the level 30 is fixedly mounted on the top of the intermediate connecting shaft 110.

[0049] Figure 7 This is a schematic diagram of the measuring component 300 in the engine valve protrusion measuring fixture 10 provided in this embodiment. Figure 8 This is a cross-sectional structural diagram of the measuring component 300 in the engine valve protrusion measuring fixture 10 provided in this embodiment. Please refer to the diagram. Figures 2-8 In this embodiment, the measuring component 300 includes a mounting structure 310 and a dial indicator 320 mounted on the mounting structure 310. The mounting structure 310 is rotatably coupled with an intermediate connecting member, thereby driving the dial indicator 320 to rotate around the intermediate connecting shaft 110. The dial indicator 320 has a measuring head 321. By rotating the dial indicator 320 around the intermediate connecting shaft 110, the dial indicator 320 can perform multi-point detection on a single engine valve 22, and also allows the dial indicator 320 to detect the protrusion amount of multiple engine valves 22 located around the intermediate connecting shaft 110. This simplifies the structure of the engine valve protrusion measurement fixture 10 and helps to reduce costs.

[0050] Optionally, in this embodiment, the mounting structure 310 includes a measuring guide sleeve, a locking clamp 313, and a fastener 316. The measuring guide sleeve includes a sleeve portion 311 and a mounting rod portion 312 fixedly connected to the sleeve portion 311. The sleeve portion 311 is sleeved on the intermediate connecting shaft 110 and locked onto the mounting rod portion 312, and the locking clamp 313 clamps the dial indicator 320. The fastener 316 is mounted on the locking clamp 313 to lock the locking clamp 313, thereby ensuring connection reliability.

[0051] Specifically, the sleeve portion 311 is a cylindrical member with a through hole in the middle, which is sleeved on the intermediate connecting shaft 110. The mounting rod portion 312 is a long, cylindrical rod, with one axial end fixedly connected to the sleeve portion 311 and the other axial end extending radially along the sleeve portion 311. The locking clamp 313 has a structure with a first clamping portion 314 and a second clamping portion 315 at both ends. Correspondingly, the fastener 316 includes a first fastener 317 for locking the first clamping portion 314 and a second fastener 318 for locking the second clamping portion 315. During installation, the first clamping portion 314 is clamped on the mounting rod portion 312 and fastened by the first fastener 317 to ensure the connection stability between the locking clamp 313 and the mounting rod portion 312; the second clamping portion 315 is clamped and installed on the dial indicator 320 and fastened by the second fastener 318 to ensure the connection stability between the locking clamp 313 and the dial indicator 320.

[0052] Optionally, the first fastener 317 and the second fastener 318 are installed in different directions. The first fastener 317 is installed vertically, and the second fastener 318 is installed horizontally. Optionally, the screw head of the first fastener 317 faces downward to avoid affecting the measurement of the dial indicator 320.

[0053] Optionally, the through hole size in the middle of the sleeve portion 311 is slightly larger than the radial dimension of the intermediate connecting shaft 110. For example, if the radial dimension of the intermediate connecting shaft 110 is 1 mm, the through hole size in the middle of the sleeve portion 311 can be set to 1.05 mm.

[0054] In this embodiment, the mounting rod 312 is mounted on the sleeve 311, and the end of the mounting rod 312 does not extend into the through hole. It is understood that in some other embodiments, the mounting rod 312 and the sleeve 311 can also be configured as an integral structure as needed.

[0055] Optionally, in this embodiment, the number of dial indicators 320 is at least two, and the at least two dial indicators 320 are distributed at different radial positions on the intermediate connecting shaft 110. Specifically, in this embodiment, the number of dial indicators 320 is two, and the two dial indicators 320 are locked and fixed at different length positions on the mounting rod 312 by locking clips 313. In this way, the two dial indicators 320 can simultaneously detect different positions of the same engine valve 22, thereby improving the accuracy of protrusion measurement through multi-point detection. The specific installation position of the dial indicator 320 can be set according to the size of the cylinder head 20. It is understood that in some other embodiments, the number of dial indicators 320 can also be specifically set according to requirements.

[0056] Furthermore, the mounting structure 310 and the intermediate connecting shaft 110 are height-adjustable, and a limiting stage 111 is provided on the intermediate connecting shaft 110. The limiting stage 111 is used to abut against the mounting structure 310 to limit the lower stop point of the measuring structure.

[0057] The engine valve protrusion measuring fixture 10 provided in this embodiment of the present invention is used by first fastening the first support rod 121 and the second support rod 124 together to form a cross-shaped support part 120. Then, a fastening screw 140 passes through the first through hole 123 and the second through hole 126 and is screwed into the threaded hole 112 of the intermediate connecting shaft 110, thereby fixing the first support rod 121 and the second support rod 124 to the intermediate connecting shaft 110 to form a support assembly 100. Then, multiple adjusting screws 200 are respectively installed on multiple arms of the support assembly 100. After installation, the support assembly 100 is placed on the platform 30. Three of the adjusting screws 200 are selected to contact the platform 30 and rotated for adjustment. During the adjustment process, the adjustment direction is determined according to the level 30 until it is level. After leveling, the remaining adjusting screw 200 is rotated to make it float and support, that is, the adjusting screw 200 contacts the platform 30, but there is no interaction force between the two. At this time, the adjustment is completed and the adjusting nut 220 is tightened.

[0058] Then, the measuring component 300 is assembled. The first clamping parts 314 of the two locking clips 313 are clamped on the mounting rod part 312 and fastened by the first fastener 317. The positions of the two locking clips 313 are determined according to the required installation positions of the two dial indicators 320. Then, the two dial indicators 320 are respectively installed on the second clamping parts 315 of the two locking clips 313 and pre-tightened by the second fastener 318 to achieve the initial assembly of the measuring component 300.

[0059] The pre-assembled measuring component 300 is inserted into the support assembly 100, which is then placed on the platform 30. After adjusting the sleeve 311 to contact the limiting stage 111, the lift of the two dial indicators 320 is adjusted respectively (e.g., Figure 9 (As shown), for example, the lift of the dial indicator 320 when it contacts the surface of the platform 30 in the current state is set to zero. After adjustment, tighten the second fastener 318 to complete the assembly of the complete measuring component 300.

[0060] Finally, after ensuring that the cleanliness of the cylinder head 20 gasket pressure surface 21 and the valve disc bottom surface of the valve 22 meets the requirements, place the engine valve protrusion measuring gauge 10 on the gasket pressure surface 21 of the cylinder head 20, align the measuring heads 321 of the two dial indicators 320 with the valve disc bottom surface of the valve 22 to be tested, and press the measuring component 300 downward along the intermediate connecting shaft 110 until the sleeve part 311 contacts the limiting stage 111. Read the readings of the two dial indicators 320 respectively, then lift and rotate the measuring component 300 at a certain angle, press and measure again, and perform multi-point dual-track measurement as required. After the current valve 22 is measured, lift the measuring component 300 and rotate it to correspond to the position of the next valve 22, and repeat the above measurement steps.

[0061] The engine valve protrusion measuring fixture 10 provided in this embodiment of the invention can quickly detect the protrusion of the valve 22 without disassembling the valve 22 component, thereby understanding the wear condition of the valve 22's conical surface and providing a reference for valve 22 replacement. This engine valve protrusion measuring fixture 10 uses point contact with the cylinder head 20 gasket pressure surface 21, resulting in a small contact area and less influence from impurities such as charred material on the cylinder head 20 gasket pressure surface 21, thus improving detection accuracy. Furthermore, the measuring component 300 is rotatably connected to the intermediate connecting shaft 110, which not only reduces the number of dial indicators 320 but also allows for multi-point measurement of a single valve 22 and the use of the same dial indicator 320 to test different valves 22. This simplifies the structure, reduces cost, and provides more accurate measurement results. Additionally, the bracket assembly 100 and the various parts of the measuring component 300 in this engine valve protrusion measuring fixture 10 are detachably connected, facilitating storage and transport after use.

[0062] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gauge for measuring the protrusion of an engine valve, characterized in that, The engine valve protrusion measuring fixture includes: A support assembly, wherein the supports include an intermediate connecting shaft and a plurality of support arms arranged circumferentially around the intermediate connecting shaft; Multiple adjusting screws are mounted one-to-one on the multiple support arms, and each adjusting screw has an arc surface. This arc surface is used to make point contact with the gasket surface of the cylinder head during measurement to position the measurement reference surface; and A measuring component is mounted on the bracket assembly and has a measuring head for contacting the engine valve to measure the amount of protrusion of the engine valve.

2. The engine valve protrusion measuring fixture according to claim 1, characterized in that, The adjusting screw and the support arm are adjustable in height to adjust the height of the arc surface relative to the bracket assembly.

3. The engine valve protrusion measuring fixture according to claim 2, characterized in that, The engine valve protrusion measuring fixture also includes a level mounted on the bracket assembly, which is used to detect whether the arc surfaces of the plurality of adjusting screws are on the same horizontal plane.

4. The engine valve protrusion measuring fixture according to claim 1, characterized in that, The measuring component includes a mounting structure and a dial indicator mounted on the mounting structure. The mounting structure is rotatably engaged with the intermediate connecting shaft to drive the dial indicator to rotate around the intermediate connecting shaft. The dial indicator has the measuring head.

5. The engine valve protrusion measuring fixture according to claim 4, characterized in that, The mounting structure includes a measuring guide sleeve, a locking clamp, and fasteners. The measuring guide sleeve includes a sleeve portion and a mounting rod portion fixedly connected to the sleeve portion. The sleeve portion is sleeved on the intermediate connecting shaft. The locking clamp is mounted on the mounting rod portion and holds the dial indicator. The fasteners are mounted on the locking clamp to lock the locking clamp.

6. The engine valve protrusion measuring fixture according to claim 4, characterized in that, The mounting structure is height-adjustable with the intermediate connecting shaft, and a limiting stage is provided on the intermediate connecting shaft. The limiting stage is used to abut against the mounting structure to limit the lower stop point of the measuring component.

7. The engine valve protrusion measuring fixture according to claim 4, characterized in that, The number of dial gauges is at least two, and the at least two dial gauges are distributed at different radial positions on the intermediate connecting shaft.

8. The engine valve protrusion measuring fixture according to claim 1, characterized in that, The bracket assembly further includes a bracket portion and fastening screws, the bracket portion being detachably connected to the intermediate connecting shaft via the fastening screws; the bracket portion has the plurality of support arms.

9. The engine valve protrusion measuring fixture according to claim 8, characterized in that, The support unit includes a first support rod and a second support rod. The middle portions of the first support rod and the second support rod overlap, and the fastening screw passes through the middle portions of the first support rod and the second support rod and is screwed and fixed to the intermediate connecting shaft. The two ends of the first support rod and the two ends of the second support rod respectively form the support arms.

10. The engine valve protrusion measuring fixture according to claim 9, characterized in that, The first support rod has a first groove in its middle portion, and the second support rod has a second groove in its middle portion. The first groove and the second groove engage to restrict the relative rotation of the first support rod and the second support rod.

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