Valve cover grinding fixture

Abstract

The application discloses a valve cover grinding tool, which is characterized by comprising a valve cover planet gear disc and a valve cover pad; the outer side of the valve cover planet gear disc is provided with engagement teeth, which are used for cooperating with a sun gear and an inner tooth ring to form a planetary gear mechanism; an end surface of the valve cover planet gear disc is provided with a valve cover loading hole; a plurality of valve cover loading holes are uniformly and interval arranged along the circumferential direction of the valve cover planet gear disc, and each valve cover loading hole is used for loading a pair of valve covers and the valve cover pad vertically and filling, and the valve cover pad is used for being arranged between the pair of valve covers in each valve cover loading hole, so that the sliding contact plane of the pair of valve covers can be extended from the valve cover loading hole and can be ground by a grinding disc.

Description

Technical Field

[0001] This invention belongs to the field of valve covers for diaphragm gas meters, and specifically relates to a valve cover grinding fixture. Background Technology

[0002] Diaphragm gas meters, with their advantages of compact structure, accurate measurement, safety, reliability, and relatively economical price, are currently widely used gas metering instruments. A diaphragm gas meter is a mechanical gas metering instrument, and its working principle is as follows:

[0003] The pressure generated by the gas entering one side of the metering chamber diaphragm pushes the diaphragm to the other side. When the diaphragm reaches its limit on the other side, the torque no longer generates the force to return it. A second diaphragm must then generate the same force to drive the first diaphragm back to its original position. When the outlet of the first diaphragm is changed to an inlet, the other side of the diaphragm is again propelled by the gas, continuing its reciprocating motion, thus changing the direction of movement of the second diaphragm. The diaphragm drives the vertical shaft to reciprocate under the influence of the pressure difference via the diaphragm plate. The vertical shaft drives the crankshaft to rotate via a linkage mechanism. The crankshaft rotation simultaneously performs two drives: Drive 1: The crankshaft drives the rocker arm to move the valve cover reciprocally on the valve grille (also called the "valve seat"), regularly opening and closing the airflow channels on the valve grille and causing the diaphragm to reciprocate. Drive 2: The gear on the crankshaft drives the counter through an intermediate transmission component to achieve metering.

[0004] Based on the working principle of the diaphragm gas meter described above, we know that the reciprocating movement of the valve cover on the valve grille determines the flow of gas and outputs the driving force for the vertical shaft and crankshaft. Simultaneously, the valve cover regularly seals the metering chamber, thus determining its sealing effect and directly affecting metering accuracy. Therefore, it is necessary to grind the sliding contact surfaces of the valve cover and valve grille to improve smoothness and ensure the long-term metering accuracy of the diaphragm gas meter.

[0005] In order to improve the grinding efficiency of the valve gate, the applicant considers using a double-sided grinding device to grind the sliding contact surface of the valve gate in batches.

[0006] However, how to make fuller and more effective use of the double-sided grinding function of the double-sided grinding device is a technical issue that needs to be considered.

[0007] Based on this, the applicant considers designing a valve cover grinding fixture that can fully and effectively utilize a double-sided grinding device. Summary of the Invention

[0008] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a valve cover grinding fixture that can make full and effective use of a double-sided grinding device.

[0009] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0010] Valve cover grinding fixture, characterized in that:

[0011] Including a planetary gear disk for the valve cover and a pad for the valve cover;

[0012] The outer side of the planetary gear disk of the valve cover has meshing teeth, which are used to cooperate with the sun gear and the internal gear ring to form a planetary gear mechanism;

[0013] A valve cover loading hole is provided through the end face of the planetary gear disk for the valve cover; a plurality of valve cover loading holes are evenly spaced along the circumference of the planetary gear disk for the valve cover. Each valve cover loading hole is used for vertically filling and loading a pair of valve covers and the valve cover pad. In each valve cover loading hole, the valve cover pad is used to pad between a pair of valve covers and so that the sliding contact plane of the pair of valve covers can extend out from the valve cover loading hole and be ground by the grinding disc.

[0014] Compared with existing technologies, the valve cover grinding fixture of this technical solution has the following advantages:

[0015] 1. It is easy to use, and both loading and unloading are convenient.

[0016] The valve cover can be directly inserted into the planetary gear disk in one go and meshed with the sun gear and internal gear ring. Then, the valve cover to be ground can be inserted into each valve cover loading hole and removed after grinding.

[0017] 2. Large loading capacity, enabling batch grinding of valve covers.

[0018] Multiple planetary gear disks for valve covers can be placed between the sun gear and the internal gear ring. Each planetary gear disk for valve covers can be equipped with multiple valve cover loading holes. Each valve cover loading hole can accommodate two valve covers for grinding, thus enabling batch grinding of valve covers at one time. Furthermore, as the diameter of the planetary gear disk for valve covers increases, the number of valve cover loading holes set on each planetary gear disk for valve covers increases, resulting in more efficient grinding operations.

[0019] 3. The valve cover pads can protect the valve cover during the grinding process.

[0020] The pair of valve covers inside the valve cover mounting hole will be subjected to significant grinding cutting forces. If a valve cover pad is not used, the pair of valve covers inside the mounting hole will squeeze and rub against each other during the grinding process, which can easily lead to damage to the valve covers. By using a valve cover pad, direct hard contact and squeezing friction between the pair of valve covers inside the valve cover mounting hole can be effectively avoided. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the mechanism of a diaphragm gas meter.

[0022] Figure 2 This is a schematic diagram of a partial explosion of the mechanism of a diaphragm gas meter.

[0023] Figure 3 A three-dimensional structural diagram of the valve grille and valve cover of a diaphragm gas meter.

[0024] Figure 4 Front view of the valve grille and valve cover of a diaphragm gas meter.

[0025] Figure 5 This is a schematic diagram of the grinding equipment used for the valve grille and valve cover of the diaphragm gas meter in this technical solution. Figure 6 This is a schematic diagram of the structure of the first embodiment of the planetary gear disk for the valve cover in this technical solution. Figure 7 This is a front view of the first embodiment of the planetary gear disk for the valve cover in this technical solution.

[0026] Figure 8 for Figure 7 AA section view

[0027] Figure 9 This is a schematic diagram of the structure of the first embodiment of the valve cover pad in this technical solution.

[0028] Figure 10 This is a front view of the first embodiment of the valve cover pad in this technical solution.

[0029] Figure 11 A schematic diagram of a pair of valve covers and a pressure pad inserted into a single valve cover loading hole.

[0030] Figure 12 This is a schematic diagram of the second embodiment of the planetary gear disk for the valve cover in this technical solution. Figure 13 This is a schematic diagram of the second embodiment of the valve cover pad in this technical solution.

[0031] Figure 14 This is a front view of the valve grille pad in this technical solution.

[0032] Figure 15 This is a front view of the planetary gear disk for the valve cover in this technical solution.

[0033] Figure 16 for Figure 15 BB section view

[0034] Figure 17 A schematic diagram of a pair of valve grilles and a pressure pad inserted into a single valve grille loading hole.

[0035] The diagram is marked as follows:

[0036] A valve cover: A1 guide protrusion

[0037] B valve grille: groove on B1

[0038] AB sliding contact plane

[0039] C-guide rod frame

[0040] Grinding equipment for valve grilles and covers of diaphragm gas meters:

[0041] 10 grinding discs

[0042] 20 grinding discs

[0043] 30 Motor for upper surface grinding, 31 Motor for lower surface grinding

[0044] Planetary gear mechanism: 41 Sun gear, 42 Internal ring gear

[0045] Hydraulic system: 50 hydraulic cylinders

[0046] 61. Planetary gear disc for valve cover: 611. Valve cover loading hole; 612. Center through hole; 613. Connecting notch.

[0047] 62 Valve cover gasket: 621 Center connection part, 622 Pressure pad part

[0048] 71 Valve gate pad: 711 Center connection part, 712 Pressure pad part

[0049] 72. Planetary gear disk for valve grid: 721. Valve grid loading hole, 722. Center through hole, 723. Connecting notch Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings.

[0051] I. For example Figures 1 to 4 As shown:

[0052] The valve cover and valve grille of the diaphragm gas meter have a sliding contact plane between the lower end face of the valve cover and the upper end face of the valve grille.

[0053] The upper end face of the valve cover has a guide protrusion that is connected to a guide rod frame fixed on the movement body for guidance, and the valve cover slides back and forth along the guide rod frame;

[0054] The valve grille is fixedly installed on the core body and has an airflow channel for switching the gas supply to the two metering chambers of each metering chamber of the core body;

[0055] The surface roughness Ra of the sliding contact plane is 0.1 to 0.3 μm.

[0056] Compared with existing technologies, the valve cover and valve grille of the diaphragm gas meter in this technical solution have the following advantages:

[0057] 1. The sliding contact surface has lower roughness and a smoother surface, resulting in less sliding friction and less wear after long-term use. This allows the sliding contact surface to maintain its sealing performance for a longer period, thus ensuring stable metering accuracy over the long term.

[0058] 2. After running at maximum flow rate for 12 months, the roughness increase of the sliding contact surface between the valve cover and the valve gate was measured to be less than 0.05. This delayed the rate of change of surface roughness (Ra) of the valve cover and valve gate contact surface and slowed down the degree of change, helping to achieve a more durable and reliable performance.

[0059] In practice, those skilled in the art will know that surface roughness is measured using a surface roughness measuring instrument (or a profile measuring instrument, such as the Keyence VR-5000 "3D profile measuring instrument"), which will not be elaborated here.

[0060] To achieve more stable surface roughness on the sliding contact surface between the valve cover and the valve gate, this technical solution further innovates the design from two aspects: the raw materials and the manufacturing process for the valve cover and the valve gate. Specifically:

[0061] II. The raw material formula for the valve cover and valve grille of the diaphragm gas meter, including the raw material components and their mass fractions, is as follows:

[0062] 30-50 parts of phenolic resin,

[0063] 10-15 parts graphite

[0064] 5-10 parts coke powder

[0065] 3-6 parts release agent.

[0066] Compared with existing technologies, the raw material formulation of the valve cover and valve grille of the diaphragm gas meter using this technical solution has the following advantages:

[0067] 1. The formulation exhibits superior consistency, excellent chemical stability, and corrosion resistance.

[0068] Phenolic resin, used as a binder and substrate, benefits from the addition of graphite. The lubricating properties of graphite enhance the flowability of the phenolic resin and the mixed raw materials, ensuring uniformity and consistency in composition and mass, thus preventing deformation or shrinkage caused by localized inconsistencies. Furthermore, graphite's high-temperature resistance, good chemical stability, and corrosion resistance can also impart these excellent properties to the raw materials.

[0069] 2. After thermosetting, the structure has higher strength and better wear resistance, and can maintain surface roughness for a long time.

[0070] Because coke powder is added to the raw materials, and coke particles are hard and porous, when mixed with phenolic resin (microscopically), the liquid phenolic resin can fill the pores on the surface of each coke particle, forming a tighter bond after thermosetting, thus enhancing adhesion. According to testing, using the raw materials of this technology can increase the structural strength of the thermoset valve cover and valve grille by at least 10%.

[0071] With the improved structural strength of the valve cover and valve grille, and the lubricating effect of graphite, the surface roughness can be maintained for a longer period of time, while also exhibiting better wear resistance.

[0072] 3. The components are simpler, the cost is lower, and the economic benefits and performance are better.

[0073] Compared with existing technologies, this technical solution has fewer components and is relatively inexpensive, thus enabling the valve cover and valve grille to have better economic benefits and performance.

[0074] In the raw material formula of the valve cover and valve grid of the diaphragm gas meter: the graphite mesh size is 1000-2000 mesh; the coke powder mesh size is 500-1340 mesh.

[0075] Graphite with the above mesh size strikes a balance between price and fully showcasing its properties. Coke powder with this mesh size has a larger particle size, resulting in greater depth and diameter of surface pores, which facilitates the full flow and thermal solidification of fluid phenolic resin, ensuring improved strength in the finished product.

[0076] The manufacturing process of the valve cover and valve grille of a diaphragm gas meter includes the following steps:

[0077] Step 1, Raw material preparation: Mix and stir the raw material formula of the valve cover and valve grid of the diaphragm gas meter as described in claim 1 or 2 according to the mass ratio.

[0078] Step 2, high-pressure thermosetting molding: The raw material obtained in step 1 is extruded into the molding cavity formed between the punch and die of the thermosetting mold using a screw extruder; the temperature is raised to 150 to 180 degrees Celsius, the pressure is 300 to 450 kg / cm2, the pressure holding time of the valve cover is 10 to 20 minutes, and the pressure holding time of the valve grille is 5 to 10 minutes.

[0079] Step 3: Demolding and cooling.

[0080] Table 1. Performance Comparison of Products Obtained by Thermosetting Using Raw Material Formulas in This Technical Solution

[0081]

[0082] As can be seen from the above, the surface roughness increase of the valve cover and valve grille of the diaphragm gas meter using the formula of this embodiment is less than 0.5% after 12 months of testing and less than 0.8% after 18 months. Therefore, it can reduce the rate and degree of change of surface roughness (Ra) of the contact surface between the valve cover and the valve grille.

[0083] III. The thermosetting forming process for valve grilles and covers involves using a grinding disc to grind the sliding contact surface between the valve grille and the cover. During the grinding process, a coolant is used to cool the grinding disc and the valve grille or cover. The process is characterized by the following: during the continuous grinding period, the pressure applied by the grinding disc to the sliding contact surface of the valve grille or cover is 0.1 to 0.3 MPa, and the grinding time is 2 to 8 minutes.

[0084] This technical solution does not mention the processing of flatness. However, it is known to those skilled in the art that flatness should meet industry-standard requirements. The flatness of the sliding contact surface of the valve grille or valve cover can be ensured by the flatness of the grinding disc.

[0085] The continuous grinding period in the grinding process is the time period during which the grinding lasts for more than 10 seconds.

[0086] In practice, the grinding disc can be raised and lowered by a lifting mechanism, and a force measuring instrument is correspondingly set between the telescopic part of the lifting mechanism and the support platform of the valve grille and valve cover. The force measuring instrument outputs a signal to the controller of the lifting mechanism, thereby enabling precise control of the lifting mechanism to ensure that the pressure applied to the grinding disc is maintained at 0.1 to 0.3 MPa.

[0087] Compared with existing technologies, the thermosetting molding process for valve grilles and covers in this technical solution has the following advantages:

[0088] By adjusting the pressure applied to the valve grille and valve cover by the grinding disc, combined with the control of the grinding time, it is possible to better ensure that the ground surface has a consistent surface roughness and obtain consistent and standard grinding processing quality.

[0089] In the thermosetting forming process of valve grilles and covers: when the horizontal axis is time and the vertical axis is pressure value, the applied pressure value changes in an M-shaped pattern.

[0090] In this way, the maximum pressure values ​​at the two vertices of the M-shaped form can be used to achieve two rough grinding operations, and the three bottom points of the M-shaped form can be used to achieve three fine grinding operations. The fine grinding and rough grinding are performed alternately, which allows the abrasive grains and grinding fluid on the grinding surface to be smoothly discharged when the pressure values ​​are close to the three bottom points. This better ensures that the grinding disc can fully grind the grinding surface and also better ensures the reliable consistency of the grinding process quality.

[0091] In the thermosetting forming process of valve gate and valve cover: the rotation speed of the grinding disc is 20 to 60 r / min.

[0092] By using the above low grinding speed, the impact of vibration during grinding on the grinding accuracy of the machined surface can be better avoided, thus ensuring the quality of grinding.

[0093] IV. Figure 5 As shown:

[0094] 1. A grinding device for the valve grille and valve cover of a diaphragm gas meter, comprising a grinding disc and a drive motor, wherein the grinding disc is driven and connected to the drive shaft of the drive motor;

[0095] It also includes a planetary gear mechanism, a support frame, a lifting mechanism, a force gauge, and a host computer;

[0096] The grinding disc includes an upper grinding disc and a lower grinding disc that are vertically opposite each other, and the drive motor includes a motor for grinding the upper surface and a motor for grinding the lower surface.

[0097] The planetary gear mechanism includes a sun gear, a planetary gear disk, and an internal gear ring.

[0098] The output shaft of the motor for grinding the lower surface is vertically and fixedly mounted on the bracket. The sun gear is fitted and fixed on the output shaft of the motor for grinding the lower surface. The lower grinding disc is annular and surrounds the sun gear and is fixedly mounted on the bracket. The internal gear ring surrounds the lower grinding disc and is fixed on the bracket by a support structure.

[0099] At least one planetary gear disk can be placed between the sun gear and the internal gear ring. The planetary gear disk has at least one loading hole on its surface. Each loading hole is used to load the valve grille or valve cover in pairs.

[0100] The lifting mechanism is fixed on the bracket, and the upper surface grinding motor is fixedly installed on the lifting part of the lifting mechanism. The output shaft of the upper surface grinding motor is vertically downward and the upper grinding disc is fixedly installed on the same axis.

[0101] The force gauge is used to detect the pushing force of the upper and lower grinding discs;

[0102] The host computer is connected to the controller of the lifting mechanism, the controller of the upper surface grinding motor, the controller of the lower surface grinding motor, and the output connector of the force measuring instrument.

[0103] Compared with existing technologies, the grinding equipment for valve grilles and valve covers in this technical solution has the following advantages:

[0104] 1. Higher grinding efficiency

[0105] The upper and lower grinding discs can simultaneously grind the sliding contact surfaces of the valve grilles or valve covers loaded in pairs in the planetary gear disk, which can multiply the grinding efficiency and better ensure the uniformity of the grinding quality of the sliding contact surfaces and achieve the required surface roughness.

[0106] 2. Better controllability of grinding pressure

[0107] A host computer, a controllable lifting mechanism, and a force measuring instrument are used to control the grinding pressure between the upper and lower grinding discs in a closed-loop feedback manner, thereby better ensuring the quality of the grinding process.

[0108] 3. It has good versatility. The same grinding equipment can grind both valve covers and valve grilles, which can improve utilization and reduce operating costs.

[0109] In the grinding equipment for the valve grille and valve cover of the diaphragm gas meter: the lifting mechanism is a hydraulic system, which includes a hydraulic cylinder, a proportional control valve, a hydraulic pump, an oil tank, and a lifting controller;

[0110] The hydraulic cylinder is vertically fixed on the bracket with the push rod of the hydraulic cylinder facing upward, and the outer end face of the push rod is fixedly mounted with the motor for grinding the upper surface through the support plate;

[0111] The input port of the hydraulic pump is connected to the bottom of the oil tank via a pipe, the output port of the hydraulic pump is connected to the inlet port of the proportional control valve via a pipe, and the return port of the proportional control valve is connected to the oil tank via a pipe; the output port of the proportional control valve is connected to the two hydraulic connectors on the hydraulic cylinder via pipes.

[0112] The lifting controller is electrically connected to the proportional control valve, and the lifting controller is electrically connected to the host computer.

[0113] Using the above hydraulic system as the lifting mechanism can take advantage of the smooth and precise control of the hydraulic system to obtain reliable grinding and processing results.

[0114] In the grinding equipment for the valve grille and valve cover of the diaphragm gas meter: the upper grinding disc and the lower grinding disc rotate in opposite clock directions.

[0115] The upper and lower grinding discs rotate in opposite clockwise directions, generating a greater grinding cutting force and accelerating the grinding process.

[0116] In the grinding equipment for the valve grille and valve cover of the diaphragm gas meter: it also includes a grinding fluid spraying structure. The grinding fluid spraying mechanism includes a plurality of vertically penetrating perforations densely arranged on the upper grinding disc. The grinding fluid spraying mechanism also includes a water pump and a nozzle. The inlet of the water pump is sealed to the grinding fluid source through a pipe. The outlet of the water pump is connected to the inlet of the nozzle through a pipe. The nozzle is fixedly installed on the bracket and faces downward at an angle toward the liquid perforations of the upper grinding disc.

[0117] When implementing this method, tap water or purified filtered water is preferred as the grinding fluid.

[0118] The above-mentioned grinding fluid spraying structure can spray grinding fluid onto the grinding disc. The grinding fluid flows into the grinding surface through the liquid perforation, thereby playing the role of grinding lubrication and cooling.

[0119] V. For example Figures 6 to 13 As shown:

[0120] Valve cover grinding fixture, including a planetary gear disk for valve cover and a pad for valve cover;

[0121] The outer side of the planetary gear disk of the valve cover has meshing teeth, which are used to cooperate with the sun gear and the internal gear ring to form a planetary gear mechanism;

[0122] A valve cover loading hole is provided through the end face of the planetary gear disk for the valve cover; a plurality of valve cover loading holes are evenly spaced along the circumference of the planetary gear disk for the valve cover. Each valve cover loading hole is used for vertically filling and loading a pair of valve covers and the valve cover pad. In each valve cover loading hole, the valve cover pad is used to pad between a pair of valve covers and so that the sliding contact plane of the pair of valve covers can extend out from the valve cover loading hole and be ground by the grinding disc.

[0123] Compared with existing technologies, the valve cover grinding fixture of this technical solution has the following advantages:

[0124] 1. It is easy to use, and both loading and unloading are convenient.

[0125] The valve cover can be directly inserted into the planetary gear disk in one go and meshed with the sun gear and internal gear ring. Then, the valve cover to be ground can be inserted into each valve cover loading hole and removed after grinding.

[0126] 2. Large loading capacity, enabling batch grinding of valve covers.

[0127] Multiple planetary gear disks for valve covers can be placed between the sun gear and the internal gear ring. Each planetary gear disk for valve covers can be equipped with multiple valve cover loading holes. Each valve cover loading hole can accommodate two valve covers for grinding, thus enabling batch grinding of valve covers at one time. Furthermore, as the diameter of the planetary gear disk for valve covers increases, the number of valve cover loading holes set on each planetary gear disk for valve covers increases, resulting in more efficient grinding operations.

[0128] 3. The valve cover pad can protect the valve cover during the grinding process.

[0129] The pair of valve covers inside the valve cover mounting hole will be subjected to significant grinding cutting forces. If a valve cover pad is not used, the pair of valve covers inside the mounting hole will squeeze and rub against each other during the grinding process, which can easily lead to damage to the valve covers. By using a valve cover pad, direct hard contact and squeezing friction between the pair of valve covers inside the valve cover mounting hole can be effectively avoided.

[0130] In the valve cover grinding fixture: the end face of the planetary gear disk for the valve cover has a central through hole, and the upper end face of the partition between each valve cover loading hole and the central through hole is recessed with a connecting groove, which makes each valve cover loading hole and the central through hole connected.

[0131] The valve cover pad has a central connecting part and spokes. Multiple spokes are spaced apart on the axial outer side of the central connecting part. The number of spokes is the same as the number of valve cover loading holes. Each spoke has a padding part that passes through the communicating groove and is used to press between a pair of valve covers.

[0132] The central connecting part is used to fall into the central through hole, and each padding part is used to pad the position between a pair of valve covers in each valve cover loading hole.

[0133] In practice, the connecting groove can also adopt a vertical through-hole structure.

[0134] The advantages of the above-mentioned planetary gear disc for valve cover and the spacer for valve cover are:

[0135] 1. The valve cover uses a structure with a central perforation and connecting groove on a planetary gear disk, which can reduce weight. The lighter weight makes it easier to manually pick up and put down, and also helps to reduce the energy consumption required for drive rotation.

[0136] 2. The structure of the central perforation and connecting groove on the planetary gear disc of the valve cover also has a converging function, which can gather the grinding fluid flowing to this point, and allow the grinding fluid to be released to the grinding surface under the action of centrifugal force throughout the grinding process, so as to play a better lubrication and cooling role, and help to obtain a better grinding effect.

[0137] 3. The valve cover pad adopts the above-mentioned integrated molding structure of the central connecting part and the spokes, which facilitates quick picking and placing, and also facilitates the placement of the pad on each spoke through one quick placement, which greatly improves the efficiency of correct placement of the valve cover pad, thereby improving the efficiency of grinding operation.

[0138] In the valve cover grinding fixture: the radially inward extension of the symmetrical center line of the valve cover loading hole on the planetary gear disk for the valve cover can intersect with the axis of the planetary gear disk for the valve cover.

[0139] The above-described structure makes the planetary gear disk and gasket for the valve cover more regular, which simplifies the processing of the planetary gear disk and gasket for the valve cover; it also facilitates the smooth discharge of the grinding fluid under centrifugal force during the grinding process.

[0140] In the valve cover grinding fixture: the padding part of the valve cover pad is used to insert and press against the position between two upward-protruding guide protrusions on the upper surface of the valve cover, and the padding part can protrude from the top position of the two upward-protruding guide protrusions.

[0141] The length of the padding portion of the valve cover pad is the same as the length of the valve cover; the minimum width of the padding portion of the valve cover pad is the same as the minimum distance between the two upward-convex guide protrusions on the upper surface of the valve cover.

[0142] The padding structure of the valve cover pad described above not only saves manufacturing materials, but also provides a stable and reliable padding support, ensuring that all parts of the valve cover being ground receive consistent grinding cutting force, thus effectively ensuring the quality of the grinding process.

[0143] In the valve cover grinding fixture: the central connecting part of the valve cover pad is annular.

[0144] This allows the valve cover pad to have the advantages of using less material, being lighter, easier to grip, and facilitating the passage and collection of grinding fluid in the central perforation of the planetary gear disk of the valve cover.

[0145] In the valve cover grinding fixture: the valve cover pad is made of rubber material through a vulcanization process.

[0146] Rubber materials are relatively inexpensive and simple to process and manufacture; moreover, rubber materials have the characteristics of rebound and vibration absorption, which can better ensure that the contact between the pair of valve covers and the upper and lower grinding surfaces inside the valve cover loading hole is tighter.

[0147] VI. For example Figures 14 to 17 As shown:

[0148] A valve grid pad has a central connecting portion and spokes. A plurality of spokes are spaced apart on the axially outer side of the central connecting portion. The number of spokes corresponds to the number of valve grid loading holes in the planetary gear disk on which the valve grid is loaded. Each spoke has a padding portion for pressing between a pair of valve grids in a single valve grid loading hole.

[0149] The valve grille pads described above adopt an integrated molding structure of the central connecting part and the spokes, which not only has the advantages of simple structure and easy production, but also makes them easier to handle. At the same time, it is also easy to place the pads on each spoke in place through one quick placement, which greatly improves the efficiency of correct placement and removal of valve grille pads, thereby helping to improve the efficiency of grinding operations on the sliding contact surface of the valve grille.

[0150] The central connecting part of the valve gate pad has a ring structure.

[0151] This allows the valve grid pad to have the advantages of using less material, being lighter, easier to grip, and facilitating the passage and collection of grinding fluid in the central perforation of the planetary gear disk of the valve grid.

[0152] Valve gate grinding fixture, including a planetary gear disk for valve gate and the aforementioned pad for valve gate;

[0153] The outer side of the planetary gear disk for the valve gate has meshing teeth, which are used to cooperate with the sun gear and the internal gear ring to form a planetary gear mechanism;

[0154] The end face of the planetary gear disk for the valve gate is provided with a valve gate loading hole; a plurality of valve gate loading holes are evenly spaced along the circumferential direction of the planetary gear disk for the valve gate, and the padding part of the valve gate pad is placed between a pair of valve gates in each valve gate loading hole, so that the sliding contact plane of the pair of valve gates can extend out from the valve gate loading hole and be ground by the grinding disc.

[0155] The advantages of the valve grille grinding fixture in this technical solution are:

[0156] 1. It is easy to use, and both loading and unloading are convenient.

[0157] The valve grille can be directly inserted into the planetary gear disk in one go, and then connected to the sun gear and internal gear ring. After that, the valve grille to be ground can be inserted and removed after grinding.

[0158] 2. Large loading capacity, enabling batch grinding of valve grilles.

[0159] Multiple planetary gear disks for valve plates can be placed between the sun gear and the internal gear ring. Each planetary gear disk for valve plates can be equipped with multiple valve plate loading holes. Each valve plate loading hole can accommodate two valve plates for grinding, thus enabling batch grinding of valve plates at one time. Furthermore, as the diameter of the planetary gear disk for valve plates increases, the number of valve plate loading holes set on each planetary gear disk for valve plates increases, resulting in more efficient grinding operations.

[0160] The end face of the planetary gear disk for the valve gate has a central through hole, and the upper end face of the partition between each valve gate loading hole and the central through hole is recessed with a connecting notch, which allows each valve gate loading hole to communicate with the central through hole.

[0161] The central connecting part of the valve gate pad is located in the central through hole, and each spoke of the valve gate pad passes through a corresponding connecting notch radially.

[0162] In practice, the connecting gap can also be a connecting groove structure.

[0163] The advantages of the above-mentioned planetary gear disk for valve gate and the spacer block for valve gate are:

[0164] 1. The structure of the central perforation and connecting notch on the planetary gear disk of the valve grille can reduce weight. The lighter weight makes it easier to manually pick up and put down, and also makes it easier to reduce the energy consumption required for drive rotation.

[0165] 2. The structure of the central perforation and connecting notch on the planetary gear disc of the valve grid also has a converging effect, which can gather the grinding fluid flowing to this point and allow the grinding fluid to be released to the grinding surface under the action of centrifugal force throughout the grinding process, so as to play a better lubrication, maintenance and cooling role, and help to obtain a better grinding effect.

[0166] The radially inward extension of the symmetrical center line of the valve gate loading hole on the planetary gear disk for the valve gate can intersect with the axis of the planetary gear disk for the valve gate.

[0167] The above-described structure makes the planetary gear disk for valve gate and the gasket for valve gate more regular, which simplifies the processing of the planetary gear disk for valve gate and the gasket for valve gate; it also facilitates the smooth discharge of grinding fluid under centrifugal force during the grinding process.

[0168] In practice, preferably, the width of the padding portion of the valve gate pad is consistent with the groove width of the upper groove in the middle of the lower end face of the valve gate, and the length of the padding portion of the valve gate pad is consistent with the width of the valve gate.

[0169] The padding structure of the valve gate pad described above can play a stable and reliable padding support role, better ensure that all parts of the sliding contact surface of the valve gate being ground receive a consistent grinding cutting force, and effectively ensure the grinding process quality.

[0170] The above are merely preferred embodiments of the present invention. It should be noted that any modifications and improvements made by those skilled in the art without departing from the present technical solution should also be considered to fall within the scope of protection claimed in this claim.

Claims

1. A valve cover grinding fixture, characterized in that: Including a planetary gear disk for the valve cover and a pad for the valve cover; The outer side of the planetary gear disk of the valve cover has meshing teeth, which are used to cooperate with the sun gear and the internal gear ring to form a planetary gear mechanism; A valve cover loading hole is provided through the end face of the planetary gear disk for the valve cover; a plurality of valve cover loading holes are evenly spaced along the circumference of the planetary gear disk for the valve cover. Each valve cover loading hole is used for vertically filling and loading a pair of valve covers and the valve cover pad. In each valve cover loading hole, the valve cover pad is used to pad between a pair of valve covers and so that the sliding contact plane of the pair of valve covers can extend out from the valve cover loading hole and can be ground by the grinding disc. The valve cover has a central through hole in the middle of the end face of the planetary gear disk. The upper end face of the partition between each valve cover loading hole and the central through hole is recessed with a connecting groove, which makes each valve cover loading hole and the central through hole connected. The valve cover pad has a central connecting part and spokes. Multiple spokes are spaced apart on the axial outer side of the central connecting part. The number of spokes is the same as the number of valve cover loading holes. Each spoke has a padding part that passes through the communicating groove and is used to press between a pair of valve covers. The central connecting part is used to fall into the central through hole, and each padding part is used to pad the position between a pair of valve covers in each valve cover loading hole; The padding part of the valve cover pad is used to insert and press against the position between two upward-protruding guide protrusions on the upper surface of the valve cover, and the padding part can protrude from the top position of the two upward-protruding guide protrusions; the length of the padding part of the valve cover pad is the same as the length of the valve cover, and the minimum width of the padding part of the valve cover pad is the same as the minimum distance between the two upward-protruding guide protrusions on the upper surface of the valve cover. The valve cover pad is an integrally formed structure of the central connecting part and the spokes; The radially inward extension of the symmetrical center line of the valve cover loading hole on the planetary gear disk for the valve cover can intersect with the axis of the planetary gear disk for the valve cover.

2. The valve cover grinding fixture according to claim 1, characterized in that: The central connecting part of the valve cover pad is ring-shaped.

3. The valve cover grinding fixture according to claim 1, characterized in that: The valve cover pad is made of rubber material through a vulcanization process.

Images