Special tool for grinding valve port of oil pressure mechanism

Abstract

The utility model provides a special tool for grinding a valve port of an oil pressure mechanism, and belongs to the technical field of devices for deburring grinding workpieces. The special tool for grinding the valve port of the oil pressure mechanism comprises a rod body used for stretching into a mounting hole of a valve body of the oil pressure mechanism, a conical head is arranged at one end of the rod body, and the conical head is provided with an outer conical surface used for making contact with the valve port of a high-pressure oil way in the valve body so as to grind the valve port. The rod body comprises a screw rod section used for being connected with the threaded hole section of the mounting hole in a matched mode, and a screwing structure used for being matched with a screwing tool to rotate the rod body is arranged at the other end of the rod body. The special tool for grinding the valve port of the oil pressure mechanism is mounted in the mounting hole of the valve body, the structure of the mounting hole of the valve body is utilized, the screw section is designed to be matched with the threaded hole section of the mounting hole, and the screwing structure is designed to facilitate rotation of the rod body, so that the rod body moves forwards while rotating, and grinding of the valve port is achieved.

Description

Technical Field

[0001] The utility model relates to a special tool for grinding a valve port of an oil pressure mechanism, and belongs to the technical field of devices for grinding and deburring workpieces. Background Art

[0002] The hydraulic operating mechanism is a mechanism that controls the switchgear to realize the opening and closing operations. It uses hydraulic oil as the power source and can also be called an oil pressure mechanism. Figure 1 The figure shows a partial structural diagram of a common oil pressure mechanism. The oil pressure mechanism includes a valve body 1 and a pressure relief rod 3 installed on the valve body 1. An oil circuit is arranged in the valve body 1. Figure 2 As shown, the oil circuit includes a high-pressure oil circuit 1-1 and a low-pressure oil circuit 1-2, and a steel ball 2 is arranged in the valve body 1. The steel ball 2 is used to block the valve port 1-5 of the high-pressure oil circuit 1-1 under the top pressure of the pressure relief rod 3 during normal operation. Among them, the valve body 1 is provided with a mounting hole for mounting the pressure relief rod 3 and the steel ball 2, and the mounting hole includes a smooth hole section 1-3 and a threaded hole section 1-4. The inner diameter of the threaded hole section 1-4 is larger than the inner diameter of the smooth hole section 1-3, and the steel ball 2 is located in the smooth hole section 1-3. The pressure relief rod 3 includes a smooth rod section and a threaded section. The smooth rod section is used to press the steel ball 2, and a sealing ring 4 is installed outside the smooth rod section, and the sealing ring 4 contacts and cooperates with the inner wall of the smooth hole section 1-3. The threaded section is used to cooperate with the threaded hole section 1-4 of the valve body 1 to realize the screwing of the pressure relief rod 3 and tighten the steel ball 2. When pressure relief is required, the pressure relief rod 3 is retracted to allow the high-pressure oil to push the steel ball 2 and enter the low-pressure oil circuit 1-2 for pressure relief.

[0003] At present, the oil circuits in the valve body 1 are completed by machining methods such as drilling. The surface quality after machining is poor, and there are burrs at the valve port 1-5. The valve port 1-5 is a transition position of the step hole and is relatively sharp. After the steel ball 2 is installed, it is pressed against the valve port 1-5 under the top pressure of the pressure relief rod 3, which can easily cause scratches on the steel ball 2. Scratches will affect the sealing performance and eventually cause oil leakage. Therefore, it is necessary to grind the sharp valve port 1-5 to grind out a chamfered structure so that the steel ball 2 will not be scratched when pressed against the chamfered structure. However, there is currently no suitable grinding tooling, which is a technical problem that needs to be urgently solved by technical personnel in this field. Utility Model Content

[0004] The utility model aims to provide a special tool for grinding the valve port of an oil pressure mechanism, so as to solve the problem that the valve port in the existing valve body has burrs and is relatively sharp after machining, which causes scratches on the steel ball, affects the sealing performance, and finally causes oil leakage.

[0005] In order to achieve the above-mentioned purpose, the special tooling for grinding the valve port of the hydraulic mechanism in the utility model adopts the following technical solutions:

[0006] A special tool for grinding the valve port of a hydraulic mechanism, comprising a rod body for extending into the mounting hole of a valve body of the hydraulic mechanism, a cone head being provided at one end of the rod body, the cone head having an outer cone surface for contacting the valve port of a high-pressure oil circuit in the valve body to grind the valve port, the rod body comprising a screw section for cooperating and connecting with a threaded hole section of the mounting hole, and a screwing structure for cooperating with a screwing tool to rotate the rod body being provided at the other end of the rod body.

[0007] The beneficial effects of the above technical scheme are: the utility model proposes a pioneering special tooling for grinding the valve port of an oil pressure mechanism, the tooling comprises a rod body, the rod body can be extended into the mounting hole of the valve body, one end of the rod body is provided with a cone head, the cone head has an outer cone surface, the outer cone surface can contact the valve port of the high-pressure oil circuit to grind the valve port; the rod body comprises a screw section for matching and connecting with the threaded hole section of the mounting hole, which is equivalent to installing the rod body in the mounting hole, and the rod body can have a certain position; the other end of the rod body is provided with a screwing structure for matching with a screwing tool to rotate the rod body, so that the rod body is rotated by the screwing structure, under the principle of thread matching, the rod body is screwed forward, so that the outer cone surface grinds the valve port, removes burrs on the valve port, and reduces the sharpness, and through continuous screwing and grinding, a chamfered structure can be ground out, so that the steel ball can be pressed on the chamfered structure without scratching, thereby ensuring the sealing performance of the steel ball and avoiding oil leakage.

[0008] In summary, the utility model utilizes the structure of the valve body mounting hole itself, utilizes the threaded hole section to realize the installation of the tooling rod body, utilizes the screwing structure at the end of the rod body to realize the rotation and advancement of the rod body, and then makes the outer cone surface squeeze the valve port to realize the grinding of the valve port.

[0009] Furthermore, the rod body also includes a polished rod segment connected between the cone head and the screw segment, and the outer diameter of the polished rod segment is smaller than the outer diameter of the screw segment.

[0010] Furthermore, an annular groove is provided on the polished rod section, a sealing ring is installed in the annular groove, and the sealing ring is used for extruding and contacting with the polished hole section of the mounting hole to straighten the rod body.

[0011] Furthermore, the polished rod segment includes a first polished rod segment and a second polished rod segment connected to the first polished rod segment and having a smaller diameter than the first polished rod segment, the second polished rod segment is connected to the cone head, the first polished rod segment is connected to the screw segment, and the annular groove is arranged on the first polished rod segment.

[0012] Further, the annular groove is arranged at one end of the first polished rod segment close to the second polished rod segment, and the annular groove is located in the middle of the entire polished rod segment.

[0013] Furthermore, the polished rod segment includes a first polished rod segment and a second polished rod segment connected to the first polished rod segment and having a smaller diameter than the first polished rod segment, the second polished rod segment is connected to the cone head, and the first polished rod segment is connected to the screw segment.

[0014] Furthermore, the maximum outer diameter of the cone head is equal to the diameter of the second polished rod segment.

[0015] Furthermore, the cone head is in a truncated cone shape, and the end surface of the cone head is a plane.

[0016] Furthermore, a screwing section is arranged at the other end of the rod body, and the screwing structure is at least one plane section arranged on the outer periphery of the screwing section.

[0017] Furthermore, the diameter of the circumscribed circle of the screwing section is smaller than the outer diameter of the screw section. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a partial structural diagram of the oil pressure mechanism in the prior art;

[0019] Figure 2 for Figure 1 The partial structure diagram of the valve body after the pressure relief rod and steel ball are hidden;

[0020] Figure 3 This is a front view of the special tooling for grinding the valve port of the oil pressure mechanism in the utility model;

[0021] Figure 4 It is a side view of the special tooling for grinding the valve port of the oil pressure mechanism in the utility model.

[0022] In the figure: 1, valve body; 1-1, high-pressure oil circuit; 1-2, low-pressure oil circuit; 1-3, smooth hole section; 1-4, threaded hole section; 1-5, valve port; 2, steel ball; 3, pressure relief rod; 5, rod body; 5-1, cone head; 5-2, second smooth rod section; 5-3, first smooth rod section; 5-4, ring groove; 5-5, screw section; 5-6, screwing section; 5-7, flat section. DETAILED DESCRIPTION

[0023] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0024] The utility model discloses a special tool for grinding the valve port of the hydraulic mechanism installed in the mounting hole of the valve body, utilizes the structure of the mounting hole of the valve body, designs the cooperation between the screw section and the threaded hole section of the mounting hole, and designs a screwing structure to facilitate the rotation of the rod body, so that the rod body can rotate and move forward at the same time, thereby realizing the grinding of the valve port.

[0025] Embodiment of the special tooling for grinding the valve port of the oil pressure mechanism in the utility model:

[0026] like Figure 3 Combined with Figure 2As shown, the special tooling for grinding the valve port of the hydraulic mechanism includes a rod body 5 for extending into the mounting hole of the valve body 1 of the hydraulic mechanism, and a cone head 5-1 is provided at one end of the rod body 5. The cone head 5-1 has an outer cone surface for contacting the valve port 1-5 of the high-pressure oil circuit 1-1 in the valve body 1 to grind the valve port 1-5. As an embodiment, the cone head 5-1 is in the shape of a truncated cone, that is, the end face of the cone head 5-1 is a plane. In other embodiments, the cone head 5-1 can also be in the shape of a cone, that is, the cone head 5-1 has a cone tip.

[0027] The rod body 5 includes a screw segment 5-5 for connecting with the threaded hole segment 1-4 of the above-mentioned mounting hole, so that the rod body 5 can be fixed in the mounting hole. The rod body 5 also includes a smooth rod segment connected between the cone head 5-1 and the screw segment 5-5, and the outer diameter of the smooth rod segment is smaller than the outer diameter of the screw segment 5-5, so that the overall shape of the rod body 5 is adapted to the stepped mounting hole, that is, the smooth rod segment cooperates with the smooth hole segment 1-3, and the screw segment 5-5 cooperates with the threaded hole segment 1-4. Of course, in other embodiments, according to the specific size of the mounting hole, if the smooth hole segment 1-3 is relatively short, or there is no smooth hole segment 1-3, the cone head 5-1 can be directly connected to the screw segment 5-5, thereby eliminating the intermediate smooth rod segment.

[0028] In this embodiment, an annular groove 5-4 is provided on the bare rod segment, and a sealing ring (not shown in the figure) is installed in the annular groove 5-4. The sealing ring is used to squeeze and contact with the light hole segment 1-3 of the mounting hole to straighten the rod body 5 to prevent it from tilting when inserted into the mounting hole. Therefore, there is a gap between the bare rod segment and the hole wall of the light hole segment 1-3 to facilitate the installation of the rod body 5.

[0029] Furthermore, if Figure 3 As shown, the polished rod segment includes a first polished rod segment 5-3 and a second polished rod segment 5-2 connected to the first polished rod segment 5-3 and having a smaller diameter than the first polished rod segment 5-3, the second polished rod segment 5-2 is connected to the cone head 5-1, and the first polished rod segment 5-3 is connected to the screw segment 5-5. In addition, the maximum outer diameter of the cone head 5-1 is equal to the diameter of the second polished rod segment 5-2, so that the outer diameter of the front end is the smallest, which is convenient for installation and can also reduce weight. The above-mentioned annular groove 5-4 is arranged on the first polished rod segment 5-3 and is located at one end of the first polished rod segment 5-3 close to the second polished rod segment 5-2, and the annular groove 5-4 is located in the middle of the overall polished rod segment, so that the straightening effect is best, and it is avoided that the front end is too far back and easily hits the hole wall of the mounting hole when it is first inserted into the mounting hole.

[0030] In addition, the other end of the rod body 5 is provided with a screwing structure for cooperating with a screwing tool to rotate the rod body 5. In this embodiment, the other end of the rod body 5 is provided with a screwing section 5-6. Figure 4As shown, the above-mentioned screwing structure is four plane cut surfaces 5-7 arranged on the outer periphery of the screwing section 5-6, and the four plane cut surfaces 5-7 are evenly distributed around the circumference, so as to facilitate cooperation with a wrench with a square inner hole. At the same time, the diameter of the circumscribed circle of the screwing section 5-6 is smaller than the outer diameter of the screw section 5-5, so as to avoid the outer diameter of the screwing section 5-6 being too large to be inconvenient to cooperate with the wrench. Of course, in other embodiments, the diameter of the circumscribed circle of the screwing section 5-6 can also be equal to or even larger than the outer diameter of the screw section 5-5. In addition, in other embodiments, the number of the plane cut surfaces 5-7 can also be three, two or one, as long as they can be adapted to the inner hole of the screwing tool. Of course, it can also be six, so as to cooperate with the hexagonal wrench.

[0031] The working principle of the special tooling for grinding the valve port of the oil pressure mechanism in the utility model is as follows:

[0032] During use, after the oil circuit on the valve body 1 is machined, there are burrs at the position of the valve port 1-5, which is relatively sharp. At this time, apply grinding paste on the outer cone surface of the cone head 5-1 of the rod body 5, and then install the rod body 5 into the mounting hole of the valve body 1 for installing the pressure relief rod 3 in the future. During the installation process, the sealing ring in the annular groove 5-4 will be squeezed and contacted with the hole wall of the light hole section 1-3 to straighten the rod body 5. At the same time, the screw section 5-5 of the rod body 5 is connected with the threaded hole section 1-4. The rod body 5 is continuously rotated by using a screwing tool and the screwing section 5-6 to make the cone head 5-1 press on the valve port 1-5, and then rotate the rod body 5 a few more times to grind the valve port 1-5, then loosen the rod body 5, and then tighten the rod body 5 again and screw it in a few more times. Repeat this several times to grind a chamfered structure on the valve port 1-5, and finally withdraw the rod body 5 as a whole from the mounting hole.

[0033] In other embodiments of the special tooling for grinding the valve port of the hydraulic mechanism: the screwing structure may not be a flat section arranged on the outer periphery of the screwing section, but an inner square hole may be machined on the end face of the screwing section to cooperate with the screwing tool, or in other embodiments, the rod body may not include the screwing section, and the end face of the screw section is the end face of the rod body. In this case, the inner square hole is directly machined on the end face of the rod body to cooperate with the screwing tool.

[0034] In other embodiments of the special tooling for grinding the valve port of the hydraulic mechanism: when the polished rod segment includes a first polished rod segment and a second polished rod segment, the maximum outer diameter of the cone head can also be smaller than the outer diameter of the second polished rod segment, and a step surface will be formed at the transition between the two.

[0035] In other embodiments of the special tooling for grinding the valve port of the hydraulic mechanism: when the polished rod segment includes the first polished rod segment and the second polished rod segment, the annular groove for installing the sealing ring can also be set in the middle of the first polished rod segment, and relative to the overall polished rod segment, the annular groove is biased to one side of the screw segment. Of course, in other embodiments, even if there is no annular groove and no sealing ring is installed, the polished rod segment can also be set as the first polished rod segment and the second polished rod segment connected to the first polished rod segment and having a smaller diameter than the first polished rod segment.

[0036] In other embodiments of the special tooling for grinding the valve port of the hydraulic mechanism: the polished rod segment no longer includes the first polished rod segment and the second polished rod segment, but polished rod segments of equal diameter, and the annular groove is directly set at a suitable position of the polished rod segment.

[0037] In other embodiments of the special tooling for grinding the valve port of the hydraulic mechanism: when the rod body includes a polished rod section, the annular groove may not be provided on the polished rod section, and the sealing ring is no longer installed. For the convenience of installation, there may still be a gap between the polished rod section and the hole wall of the polished hole section, but the gap is appropriately smaller.

[0038] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the description and drawings of the present invention shall be included in the protection scope of the present invention.

Claims

1. A special tool for grinding the valve port of a hydraulic mechanism. It is characterized in that It includes a rod body for extending into the mounting hole of the valve body of the oil pressure mechanism, one end of the rod body is provided with a cone head, the cone head has an outer cone surface for contacting the valve port of the high-pressure oil circuit in the valve body to grind the valve port, the rod body includes a screw section for cooperating with the threaded hole section of the mounting hole, and the other end of the rod body is provided with a screwing structure for cooperating with a screwing tool to rotate the rod body.

2. The special tooling for grinding the valve port of the hydraulic mechanism according to claim 1, It is characterized in that The rod body also includes a polished rod segment connected between the cone head and the screw segment, and the outer diameter of the polished rod segment is smaller than the outer diameter of the screw segment.

3. The special tooling for grinding the valve port of the hydraulic mechanism according to claim 2, It is characterized in that The polished rod section is provided with an annular groove, in which a sealing ring is installed. The sealing ring is used for extruding and contacting with the polished hole section of the installation hole to straighten the rod body.

4. The special tooling for grinding the valve port of the hydraulic mechanism according to claim 3, It is characterized in that The polished rod segment includes a first polished rod segment and a second polished rod segment connected to the first polished rod segment and having a smaller diameter than the first polished rod segment. The second polished rod segment is connected to the cone head, and the first polished rod segment is connected to the screw segment. The annular groove is arranged on the first polished rod segment.

5. The special tooling for grinding the valve port of the hydraulic mechanism according to claim 4, It is characterized in that The annular groove is arranged at one end of the first polished rod segment close to the second polished rod segment, and the annular groove is located in the middle of the entire polished rod segment.

6. The special tooling for grinding the valve port of the hydraulic mechanism according to claim 2, It is characterized in that The polished rod segment comprises a first polished rod segment and a second polished rod segment connected to the first polished rod segment and having a smaller diameter than the first polished rod segment. The second polished rod segment is connected to the cone head, and the first polished rod segment is connected to the screw segment.

7. The special tool for grinding the valve port of the hydraulic mechanism according to any one of claims 4 to 6, It is characterized in that The maximum outer diameter of the cone head is equal to the diameter of the second polished rod section.

8. The tooling for grinding the valve port of a hydraulic mechanism according to any one of claims 1 to 6, It is characterized in that The cone head is in a truncated cone shape, and the end face of the cone head is a plane.

9. The tooling for grinding the valve port of a hydraulic mechanism according to any one of claims 1 to 6, It is characterized in that The other end of the rod body is provided with a screwing section, and the screwing structure is at least one plane section provided on the outer periphery of the screwing section.

10. The special tooling for grinding the valve port of the hydraulic mechanism according to claim 9, It is characterized in that The diameter of the circumscribed circle of the twisting section is smaller than the outer diameter of the screw section.

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