A seat valve seat surface maintenance tool

Abstract

The utility model discloses a seat circle valve seat surface maintenance frock relates to engine maintenance technical field, through setting seat circle placement hole for installing the seat circle of detection in seat circle carrier, and setting the guide pipe inner hole at seat circle placement hole bottom, after installing the seat circle of detection in seat circle placement hole, the detection guide rod of electronic testing fixture can be inserted the guide pipe inner hole simulated in frock lower part, realizes coarse positioning, ensures upper electronic testing fixture ball head contact valve seat surface, automatic rotation, realizes valve seat surface roundness detection, through locking spare part to the seat circle of detection installed in seat circle placement hole carries out locking operation, ensures seat circle to stick flat lower part locating surface, and can not rotate freely, and the middle core rod inserts the guide pipe inner hole, realizes positioning, and hand presses upper switch and starts the grinding wheel rotation, realizes the dressing of seat circle valve seat surface, has realized the function of quick repair seat circle valve seat surface.

Description

Technical Field

[0001] This utility model relates to the field of engine maintenance technology, specifically to a valve seat surface maintenance tool. Background Technology

[0002] The engine cylinder head seat is a component installed on the valve seat surface and the inner hole of the guide tube below it. It is one of the most important structural components of the engine. It is used to realize the intake, exhaust, and fuel injection during combustion in the cylinder and to form a closed space. The valve seat surface contacts the valve seat surface of the seat ring to open and close the intake and exhaust passages. Together with all other transmission, load-bearing, cooling, lubrication, power generation and control components of the engine, such as crankshaft, connecting rod, cylinder block, piston, camshaft, oil pump, water pump, etc., it realizes the function of engine output power.

[0003] The existing process cannot independently inspect and repair the roundness of the valve seat surface of the seat ring. The valve seat surface of the seat ring can only be inspected and repaired after it has been pressed into the hole on the cylinder head. As a result, the quality of the parts from external factories cannot be monitored, which reduces assembly and maintenance efficiency. Utility Model Content

[0004] The purpose of this utility model is to provide a maintenance fixture for valve seat surfaces, which enables direct roundness inspection and rework of individual valve seat surfaces, ensuring the quality of the assembled parts, improving equipment maintenance efficiency, reducing maintenance costs, and reducing the labor intensity of inspection and rework personnel.

[0005] To solve the above-mentioned technical problems, this utility model provides a seat ring valve seat surface maintenance fixture, including a seat ring carrier and a locking member. The top of the seat ring carrier is provided with a seat ring placement hole for installing a seat ring to be tested and a guide tube inner hole provided at the bottom of the seat ring placement hole. The guide tube inner hole is used for inserting an intermediate mandrel and positioning the seat ring carrier. The seat ring placement hole and the central axis of the guide tube inner hole are coaxial. The seat ring carrier is provided with a through hole from the outer side wall to the seat ring placement hole. The locking member is installed in the through hole and is used to lock the seat ring to be tested installed in the seat ring placement hole.

[0006] It also includes a support and fixing member that extends laterally outward from the bottom of the seat ring carrier, used for installing and fixing the seat ring carrier. The support and fixing member is symmetrical about the central axis of the seat ring carrier and is provided with a plurality of fixing screw holes that are symmetrical about the central axis of the seat ring carrier.

[0007] It also includes a pressure plate disposed on the top of the seat ring carrier for fixing and pressing the seat ring to be tested. The pressure plate is provided with a through groove and is movably connected to the support fixing member through a connecting screw disposed in the through groove and the fixing screw hole.

[0008] It also includes a plurality of lower grooves located on the lower surface of the pressure plate outside the through groove, and an upper groove located on the upper surface of the support and fixing member corresponding to the lower grooves. The plurality of lower grooves are symmetrical about the central axis of the seat ring carrier. A top rod for supporting the pressure plate and the support and fixing member is provided between the lower grooves and the upper grooves. The bottom of the lower groove is arc-shaped.

[0009] The difference between the diameter of the seat ring placement hole and the seat ring to be tested is 2um-10um, and the depth of the seat ring placement hole is 1mm-2mm less than the thickness of the seat ring to be tested.

[0010] The outer contour of the cross-section of the seat ring support is rectangular or circular.

[0011] The locking component is an HRC30-45 locking component.

[0012] The locking member is L-shaped or T-shaped, and the angle between the length direction of the main body of the locking member and the bottom surface of the seat ring placement hole is 10-20°.

[0013] It also includes a degassing groove located at the bottom of the side wall of the seat ring placement hole.

[0014] This also includes a weight-reducing groove disposed on the outer wall of the middle part of the seat ring support.

[0015] The valve seat surface maintenance fixture provided in this embodiment of the invention has the following advantages compared with the prior art:

[0016] The valve seat surface maintenance fixture provided in this embodiment of the utility model has a seat seat placement hole for mounting the seat seat to be tested on the seat seat carrier, and a guide tube inner hole at the bottom of the seat seat placement hole. After the seat seat to be tested is installed in the seat seat placement hole, the detection guide rod of the electronic gauge can be inserted into the simulated guide tube inner hole at the bottom of the fixture to achieve coarse positioning, ensuring that the ball head of the upper electronic gauge contacts the valve seat surface and rotates automatically to detect the roundness of the valve seat surface. The seat seat to be tested is locked in the seat seat placement hole by a locking device to ensure that the seat seat is flat against the lower positioning surface and cannot rotate freely. The middle mandrel is inserted into the guide tube inner hole to achieve positioning. Pressing the upper switch starts the grinding wheel to rotate, thereby achieving the re-grinding of the valve seat surface. This realizes the function of quickly repairing the valve seat surface, ensuring the quality of the assembly, improving the maintenance efficiency of the equipment, reducing maintenance costs, and reducing the labor intensity of inspection and repair personnel. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of a structure of an embodiment of the valve seat surface maintenance fixture provided by this utility model;

[0019] Figure 2 A schematic diagram of another embodiment of the valve seat surface maintenance fixture provided by this utility model;

[0020] Figure 3 A top view schematic diagram of an embodiment of the valve seat surface maintenance fixture provided by this utility model;

[0021] Figure 4 A schematic diagram of the pressure plate structure of an embodiment of the seat ring valve seat surface maintenance fixture provided by this utility model;

[0022] Figure 5 A schematic diagram of the structure of the seat ring support body of an embodiment of the seat ring valve seat surface maintenance tool provided by this utility model;

[0023] Among them, 10-seat ring support, 30-locking component, 20-seat ring to be tested, 1-bolt, 2-pressure plate, 3-connecting screw, 4-top rod, 5-support fixing component, 22-lower groove, 21-wedge structure, 13-seat ring placement hole, 12-inner hole of guide tube, 11-fixing screw hole, 14-degassing groove, 15-upper groove, 16-weight reduction groove. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please refer to Figures 1-5 , Figure 1 A schematic diagram of a structure of an embodiment of the valve seat surface maintenance fixture provided by this utility model; Figure 2 A schematic diagram of another embodiment of the valve seat surface maintenance fixture provided by this utility model; Figure 3 A top view schematic diagram of an embodiment of the valve seat surface maintenance fixture provided by this utility model; Figure 4 A schematic diagram of the pressure plate structure of an embodiment of the seat ring valve seat surface maintenance fixture provided by this utility model; Figure 5 A schematic diagram of the structure of the seat ring support body of an embodiment of the seat ring valve seat surface maintenance tool provided by this utility model.

[0026] In one specific embodiment, the seat ring valve seat surface maintenance fixture includes a seat ring carrier 10 and a locking member 30. The top of the seat ring carrier 10 is provided with a seat ring placement hole 13 for installing a seat ring 20 to be tested, and a guide tube inner hole 12 is provided at the bottom of the seat ring placement hole 13. The guide tube inner hole 12 is used for the insertion of an intermediate mandrel and for positioning the seat ring carrier 10. The seat ring placement hole 13 is coaxial with the central axis of the guide tube inner hole 12. The seat ring carrier 10 is provided with a through hole from the outer side wall to the seat ring placement hole 13. The locking member 30 is installed in the through hole and is used to lock the seat ring 20 to be tested installed in the seat ring placement hole 13.

[0027] By providing a seat ring placement hole 13 for mounting the seat ring 20 to be tested in the seat ring carrier 10, and providing a guide tube inner hole 12 at the bottom of the seat ring placement hole 13, the detection guide rod of the electronic gauge can be inserted into the simulated guide tube inner hole 12 at the bottom of the tooling after the seat ring 20 to be tested is installed in the seat ring placement hole 13, achieving coarse positioning and ensuring that the ball head of the upper electronic gauge contacts the valve seat surface and rotates automatically to achieve valve seat surface roundness detection. The seat ring 20 to be tested installed in the seat ring placement hole 13 is locked by the locking member 30 to ensure that the seat ring is flat against the lower positioning surface and cannot rotate freely. The middle mandrel is inserted into the guide tube inner hole 12 to achieve positioning. Pressing the upper switch starts the grinding wheel to rotate, achieving the re-grinding of the seat ring valve seat surface. This realizes the function of quickly re-repairing the seat ring valve seat surface, ensuring the quality of the assembly, improving the maintenance efficiency of the equipment, reducing maintenance costs, and reducing the labor intensity of inspection and re-repair personnel.

[0028] To further improve the accuracy of the test and prevent the seat ring support 10 from moving during the test, in one embodiment, the seat ring valve seat surface maintenance fixture further includes a support fixing member 5 that extends laterally outward from the bottom of the seat ring support 10, for installing and fixing the seat ring support 10. The support fixing member 5 is symmetrical about the central axis of the seat ring support 10, and the support fixing member 5 is provided with a plurality of fixing screw holes 11 that are symmetrical about the central axis of the seat ring support 10.

[0029] By providing a laterally extended support and fixing member 5 at the bottom of the seat ring carrier 10 for installation and fixation of the seat ring carrier 10, the stability of the overall structure during the test is improved and the test accuracy is increased.

[0030] This application does not limit the shape, size, or arrangement of the support fastener 5; it can be welded to, snap-fitted to, or be an integral structure with the seat ring carrier 10. This application also does not limit the size, number, or distribution of the fixing screw holes 11.

[0031] Since the test seat ring 20 is installed in the seat ring placement hole 13 for testing in this application and locked with the locking member 30, there is still a possibility that the test seat ring 20 may move up and down after vibration. In order to improve the accuracy of the test, in one embodiment, the seat ring valve seat surface maintenance fixture also includes a pressure plate 2 set on the top of the seat ring carrier 10 for fixing and pressing the test seat ring 20. The pressure plate 2 is provided with a through groove and is movably connected to the support fixing member 5 through the connecting screw 3 set in the through groove and the fixing screw hole 11.

[0032] By setting a pressure plate 2 on the top of the seat ring carrier 10 to apply pressure to the seat ring 20 to be tested, the seat ring carrier 10 and the seat ring 20 to be tested are integrated into one unit, so that the testing accuracy will not be reduced even if vibration occurs.

[0033] The connecting screw 3 is movably connected to the support fixing member 5. It can be snapped on the top or bolted together with bolt 1.

[0034] This application does not limit the shape, size, or material of the pressure plate 2. The pressure plate 2 can be a rectangular cross-section or a wedge-shaped pressure plate 2 to facilitate the entry of the testing device. The wedge-shaped structure 21 of the tip surface of the wedge-shaped pressure plate 2 is positioned to support the seat ring 20 to be tested. A through groove is provided in the pressure plate 2, and a connecting screw 3 is provided in the through groove to be movably connected to the support fixing member 5 to ensure the stability of the connection.

[0035] To further improve the fixing effect of the pressure plate 2, in one embodiment, the seat ring valve seat surface maintenance fixture also includes a plurality of lower grooves 22 disposed on the lower surface of the pressure plate 2 outside the through groove, and an upper groove 15 disposed on the upper surface of the support fixing member 5 corresponding to the lower grooves 22. The plurality of lower grooves 22 are symmetrical about the central axis of the seat ring carrier 10. A top rod 4 for supporting the pressure plate 2 and the support fixing member 5 is disposed between the lower grooves 22 and the upper grooves 15. The bottom shape of the lower grooves 22 is arc-shaped.

[0036] By setting a lower groove 22 on the lower surface of the pressure plate 2 and setting an upper groove 15 on the upper surface of the support fixing member 5 that corresponds to the lower groove 22, and supporting it with a top rod 4, a support point can be added to the pressure plate 2. By adjusting the tightness of the connecting screw 3, the reliability of the connection is improved.

[0037] This application does not limit the dimensions of the lower groove 22, the upper groove 15, and the top rod 4.

[0038] This application includes, but is not limited to, using a top rod 4 to fix and support the pressure plate 2; other structures may also be used.

[0039] In this application, the size of the seat ring placement hole 13 is not limited. In order to ensure the installation reliability of the seat ring 20 to be tested, the difference between the diameter of the seat ring placement hole 13 and the seat ring 20 to be tested is 2um-10um, and the depth of the seat ring placement hole 13 is 1mm-2mm smaller than the thickness of the seat ring 20 to be tested.

[0040] The purpose of using this size is to expose the seat ring for easy removal; the exposed size can be set as needed.

[0041] This application does not limit the shape and size of the seat ring support 10. The outer contour of the cross-section of the seat ring support 10 is rectangular or circular, and it is generally a rotating body structure. The overall shape can be designed as needed, including but not limited to rectangular or circular shapes.

[0042] Since the locking operation is performed using the locking member 30, the locking member 30 will apply pressure to the seat ring 20 to be tested, which is prone to surface damage. In order to avoid or reduce surface damage, the locking member 30 is an HRC30-45 locking member.

[0043] The hardness of the locking element in this application is generally lower than that of the seat ring 20 to be tested, which can reduce damage to the seat ring 20 to be tested. There can be one or more locking elements 30. Because the gap is very small, one locking element 30 is generally used so that even if some center offset occurs, it will not affect the roundness detection accuracy, because the existing detection has the function of automatically finding the center and correcting.

[0044] The locking element 30 is inclined, and the contact surface also has an angle and a curved surface. Its hardness is also half that of the seat ring. Therefore, every time it is locked, the seat ring will fit very firmly against the lower plane and will not rotate in the circumference. You can tell whether it is locked by gently turning it with your hand. In actual use, the locking effect is very reliable. You only need to touch it lightly to lock it.

[0045] This application does not limit the shape and size of the locking member 30. The locking member 30 is L-shaped or T-shaped, and the angle between the length direction of the main body of the locking member 30 and the bottom surface of the seat ring placement hole 13 is 10-20°.

[0046] By adopting an L-shaped or T-shaped handle structure, users can easily perform locking or releasing operations.

[0047] To prevent bulging at the 90-degree sharp corner of the junction, which would prevent the seat ring from fitting flat against the lower plane and side wall, in one embodiment, the seat ring valve seat surface maintenance fixture further includes a degassing groove 14 disposed at the bottom of the side wall of the seat ring placement hole 13.

[0048] The degassing groove 14 can prevent bulging at the 90-degree sharp corner of the junction, and the seat ring can be efficiently flat against the lower plane and side wall, improving the efficiency of seat ring installation.

[0049] This application does not limit the shape and size of the degassing groove 14.

[0050] To further improve ease of use, in one embodiment, the seat ring valve seat surface maintenance fixture also includes a weight reduction groove 16 disposed on the outer side wall of the middle part of the seat ring support 10.

[0051] The weight-reducing groove 16 provided on the side can both fix the seat ring support 10 to the side and reduce the weight of the seat ring support 10, thereby improving the ease of movement.

[0052] This application does not impose any restrictions on the location, number, shape, or distribution of the weight reduction grooves.

[0053] In one embodiment, the seat ring valve seat surface maintenance fixture includes an integral cylindrical structure with a laterally extended support and fixing member 5 at the bottom. The integral cylindrical seat ring carrier 10 has a seat ring placement hole 13 at the top for seat ring positioning and installation. A locking lateral locking knob is tightened to ensure that the seat ring is flat against the lower positioning surface and cannot rotate freely. A middle mandrel is inserted into the simulated guide tube inner hole 12 at the bottom of the fixture to achieve positioning. Pressing the upper switch starts the grinding wheel to rotate and achieve the grinding of the seat ring valve seat surface.

[0054] Specifically, the seat ring placement hole 13 has a stepped surface at the bottom that is flush with the lower plane of the seat ring; the seat ring placement hole 13 is 4µm larger than the outer circle of the seat ring on one side to achieve positioning; the concentricity, roundness and cylindricity of the hole to the simulated guide hole at the bottom are good, and the perpendicularity of the stepped surface to the center line of the hole system is good, ensuring the accuracy of the roundness detection of the valve seat surface.

[0055] The testing principle is to use this fixture to simulate the state of the seat ring after it is installed on the cylinder head bore, and to use existing KONEB electronic inspection tools for inspection and existing rework grinding wheels for rework. This achieves the function of inspecting one seat ring in 10 seconds with good accuracy, and also enables rapid rework of the seat ring valve seat surface.

[0056] The above solution has the following technical advantages:

[0057] 1. Enables direct detection and repair of the roundness and runout of a single valve seat surface;

[0058] 2. It greatly improves the accuracy of roundness detection, replacing the Marl roundness meter and coordinate measuring machine; it also greatly improves the detection efficiency, reducing it from 300 seconds / piece for the Marl roundness meter or coordinate measuring machine to 10 seconds / piece.

[0059] 3. Reduced the workload of testing and repair personnel;

[0060] 4. It has been of great help in future investigations into quality issues and other difficult problems related to the seat ring.

[0061] In summary, the valve seat surface maintenance fixture provided by this utility model embodiment, by setting a seat ring placement hole for installing the seat ring to be tested on the seat ring carrier, and setting a guide tube inner hole at the bottom of the seat ring placement hole, allows the detection guide rod of the electronic gauge to be inserted into the simulated guide tube inner hole at the bottom of the fixture after the seat ring to be tested is installed in the seat ring placement hole, achieving coarse positioning and ensuring that the ball head of the upper electronic gauge contacts the valve seat surface and rotates automatically to achieve valve seat surface roundness detection. The seat ring to be tested installed in the seat ring placement hole is locked by a locking member to ensure that the seat ring is flat against the lower positioning surface and cannot rotate freely. The middle mandrel is inserted into the guide tube inner hole to achieve positioning. Pressing the upper switch starts the grinding wheel to rotate, realizing the re-grinding of the valve seat surface. This realizes the function of quickly repairing the valve seat surface, ensuring the quality of the assembly, improving the maintenance efficiency of the equipment, reducing maintenance costs, and reducing the labor intensity of inspection and repair personnel.

[0062] The above provides a detailed description of the seat ring valve seat surface maintenance fixture provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that those skilled in the art can make several improvements and modifications to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A maintenance fixture for a seat ring valve seat surface, characterized in that, The device includes a seat ring carrier and a locking component. The top of the seat ring carrier is provided with a seat ring placement hole for mounting the seat ring to be tested and a guide tube inner hole provided at the bottom of the seat ring placement hole. The guide tube inner hole is used for inserting an intermediate mandrel and for positioning the seat ring carrier. The seat ring placement hole and the central axis of the guide tube inner hole are coaxial. The seat ring carrier is provided with a through hole from the outer side wall to the seat ring placement hole. The locking component is installed in the through hole and is used to lock the seat ring to be tested installed in the seat ring placement hole.

2. The seat ring valve seat surface maintenance fixture as described in claim 1, characterized in that, It also includes a support and fixing member provided on the lateral extension of the bottom of the seat ring carrier, used for installing and fixing the seat ring carrier. The support and fixing member is symmetrical about the central axis of the seat ring carrier and is provided with a plurality of fixing screw holes symmetrical about the central axis of the seat ring carrier.

3. The seat ring valve seat surface maintenance fixture as described in claim 2, characterized in that, It also includes a pressure plate disposed on the top of the seat ring carrier for applying pressure to fix the seat ring to be tested. The pressure plate is provided with a through groove and is movably connected to the support fixing member through a connecting screw disposed in the through groove and the fixing screw hole.

4. The seat ring valve seat surface maintenance fixture as described in claim 3, characterized in that, It also includes a plurality of lower grooves disposed on the lower surface of the pressure plate outside the through groove, and an upper groove disposed on the upper surface of the support fixing member corresponding to the lower grooves. The plurality of lower grooves are symmetrical about the central axis of the seat ring carrier. A top rod for supporting the pressure plate and the support fixing member is disposed between the lower groove and the upper groove. The bottom of the lower groove is arc-shaped.

5. The seat ring valve seat surface maintenance fixture as described in claim 1, characterized in that, The difference between the diameter of the seat ring placement hole and the seat ring to be tested is 2um-10um, and the depth of the seat ring placement hole is 1mm-2mm less than the thickness of the seat ring to be tested.

6. The seat ring valve seat surface maintenance fixture as described in claim 5, characterized in that, The cross-sectional outer contour of the seat ring support is rectangular or circular.

7. The seat ring valve seat surface maintenance fixture as described in claim 1, characterized in that, The locking component is an HRC30-45 locking component.

8. The seat ring valve seat surface maintenance fixture as described in claim 7, characterized in that, The locking member is L-shaped or T-shaped, and the angle between the length direction of the main body of the locking member and the bottom surface of the seat ring placement hole is 10-20°.

9. The seat ring valve seat surface maintenance fixture as described in claim 1, characterized in that, It also includes a degassing groove located at the bottom of the side wall of the seat ring placement hole.

10. The seat ring valve seat surface maintenance fixture as described in claim 1, characterized in that, It also includes a weight-reducing groove disposed on the outer wall of the middle part of the seat ring support.

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