Valve element ejector rod coping tool

Abstract

The invention relates to the technical field of valve element ejector rod coping, in particular to a valve element ejector rod coping tool which is characterized in that a limiting sleeve is arranged in a holding cylinder, a valve element ejector rod to be coped is inserted into one end of the limiting sleeve, a guide sleeve is detachably installed at the bottom of the limiting sleeve, and a guide hole allowing the valve element ejector rod to be coped to penetrate out is formed in the guide sleeve; the bottom end of the abutting piece abuts against one end of the limiting sleeve. One end of a to-be-ground valve element ejector rod is placed into the limiting sleeve and firmly fixed, the limiting sleeve abuts against the abutting piece, the abutting piece is adjusted, the dial gauge is observed, the to-be-ground valve element ejector rod is adjusted to the proper position, then the guide sleeve is installed, and the to-be-ground end valve element ejector rod extends out of the guide sleeve through a through hole in the guide sleeve. And the extension length is equal to the to-be-ground length, at the moment, an assembler can hold the tool in the vertical state, the to-be-ground end of the valve element ejector rod is ground through a grinding disc or abrasive paper, and repeated measurement is not needed.

Description

Technical Field

[0001] The invention relates to the technical field of valve core push rod grinding, in particular to a valve core push rod grinding tool. Background Art

[0002] In rocket propulsion systems, valve core push rods play a vital role in valve assembly. Their main functions include precisely controlling valve opening and closing, transmitting power and signals, maintaining sealing, and adapting to extreme environments. When the valve core push rods leave the factory, a margin is usually left for the length of the push rods to allow assemblers to grind and adjust them by themselves. Assemblers often grind them by hand with the help of grinding paste, grinding discs or sandpaper. However, the grinding length is often relatively small, and repeated length measurement is required to meet the length requirement, which seriously affects the progress of the task and is inconvenient during mass production operations.

[0003] Therefore, how to use the tooling to set the grinding length in advance and then quickly grind the valve core push rod has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] The invention provides a valve core push rod grinding tool, which is used to solve the problem of how to set the grinding length in advance with the help of the tool and then quickly grind the valve core push rod.

[0005] The present invention provides a valve core push rod grinding tool, comprising: Grip tube; A limiting sleeve is arranged inside the holding tube, and one end of which is plugged with a valve core push rod to be ground; The guide sleeve is detachably mounted on the bottom of the limiting sleeve, and the guide sleeve is formed with a guide hole for the valve core push rod to be repaired to pass through; The bottom end of the pressing piece abuts against one end of the limiting sleeve.

[0006] In some embodiments, the pressing member includes: A base is installed inside the holding tube, and a threaded hole is formed on the base; The lifting member passes through the top surface of the holding tube and the base in sequence, is threadedly connected with the base through the threaded hole, and the bottom end is used for pressing the limiting sleeve.

[0007] In some of the embodiments, the lifting member comprises: Knob plate; A screw rod, one end of which is connected to the knob disk, and the screw rod is threadedly connected to the base; The first abutment plate has a top connected to the other end of the screw rod.

[0008] In some of the embodiments, the holding tube and the limiting sleeve are both made of transparent materials, and a scale is also marked on the holding tube for reading the extended length of the end of the valve core push rod to be ground.

[0009] In some of these embodiments, it further includes: An end cap, covering the top of the holding cylinder by insertion.

[0010] In some of these embodiments, it further includes: An axial clamping assembly, installed at the bottom of the lifting member, for clamping and limiting the sleeve.

[0011] In some of these embodiments, the axial clamping assembly includes: Clamping plates, circumferentially and uniformly installed on the bottom surface of the first abutting plate; A second abutting plate, installed at one end of the clamping plate away from the first abutting plate; An abutting block, installed on the inner wall of the holding cylinder.

[0012] In some of these embodiments, the bottom surface enclosed by the axial clamping assembly at the bottom of the lifting member has the same radius as the bottom surface of the limiting sleeve.

[0013] In some of these embodiments, it further includes: a radial clamping assembly, and the radial clamping assembly includes: Clamping blocks, circumferentially and uniformly arranged on the inner wall of the guide sleeve, and an arc-shaped groove is provided at the clamping end of the clamping block, and a spring hole is provided on the surface; Springs, sequentially passing through the spring holes of multiple clamping blocks.

[0014] In some of these embodiments, a gasket is installed on the surface of the clamping end of the radial clamping assembly.

[0015] In some of these embodiments, a gasket is installed on the surface of the clamping end of the radial clamping assembly.

[0016] The beneficial effects of the present invention are as follows: During use, one end of the valve core ejector rod to be ground is placed inside the limiting sleeve, so that the limiting sleeve abuts against the lifting member, and is clamped by the axial clamping assembly. Then, the lifting member is adjusted, and the scale is observed to adjust the valve core ejector rod to be ground to an appropriate position. Then, the guide sleeve is installed, and the limiting sleeve is fixed by the radial clamping assembly inside the guide sleeve. The valve core ejector rod at the end to be ground extends out of the guide sleeve through the through hole on the guide sleeve, and the extending length is equal to the length to be ground. At this time, the assembler can hold the tool in a vertical state and grind the end of the valve core ejector rod to be ground with a grinding disc or sandpaper. When the bottom of the guide sleeve contacts the grinding disc or sandpaper, it means that the grinding is completed, and there is no need to repeat the measurement. Moreover, during the grinding process, due to the action of the limiting sleeve, the axial clamping assembly and the radial clamping assembly, the valve core ejector rod to be ground will not change its position, reducing errors and greatly improving the grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1It is a schematic structural view of a grinding tool for a valve core ejector rod of the present invention from a perspective; Figure 2 It is Figure 1 A schematic structural view of some specific embodiments of a holding cylinder in a grinding tool for a valve core ejector rod shown; Figure 3 It is Figure 1 A schematic structural view of some specific embodiments of an end cover in a grinding tool for a valve core ejector rod shown; Figure 4 It is Figure 1 A schematic structural view of some specific embodiments of a limit sleeve in a grinding tool for a valve core ejector rod shown; Figure 5 It is Figure 1 A top view of some specific embodiments of a guide sleeve in a grinding tool for a valve core ejector rod shown.

[0018] Figure 6 It is Figure 1 A schematic structural view of some specific embodiments of a lifting member in a grinding tool for a valve core ejector rod shown; Figure 7 It is Figure 1 A schematic structural view of some specific embodiments of a radial clamping assembly in a grinding tool for a valve core ejector rod shown; In the drawings, 1, holding cylinder; 11, cylinder body; 12, mounting groove; 2, end cover; 21, cover plate; 22, positioning plug; 3, limit sleeve; 4, guide sleeve; 5, base; 6, lifting member; 61, knob disc; 62, screw rod; 63, first abutting plate; 64, rubber pad; 7, axial clamping assembly; 71, clamping plate; 72, second abutting plate; 73, abutting block; 8, radial clamping assembly; 81, clamping block; 82, arc groove; 83, spring hole; 84, spring; 9, scale. Specific embodiments

[0019] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0020] As in the background art, assemblers often perform grinding by hand, with the aid of grinding paste, grinding discs or sandpaper. However, the grinding length is often relatively small, and it is necessary to repeatedly measure the length to meet the length requirements, which seriously affects the task progress during mass production operations and is inconvenient. Therefore, how to use a tooling to preset the grinding length and then quickly grind the valve core ejector rod has become a technical problem that needs to be solved urgently by those skilled in the art.

[0021] To solve the above problems, referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , on the one hand, the present invention provides a grinding tooling for a valve core push rod, including a holding cylinder 1, a limiting sleeve 3, a guide sleeve 4 and a pressing member. The limiting sleeve 3 is arranged inside the holding cylinder 1, and one end thereof is inserted with a valve core push rod to be ground. The guide sleeve 4 is detachably installed at the bottom of the limiting sleeve 3. The guide sleeve 4 is formed with a guide hole for the valve core push rod to be ground to pass through. The bottom end of the pressing member abuts against one end of the limiting sleeve 3.

[0022] In this embodiment, the limiting sleeve 3 is installed inside the holding cylinder 1 to limit the displacement of the valve core push rod to be ground during grinding, so as not to affect the grinding effect. Among them, the limiting sleeve 3 can be replaced, and different diameter sleeves can be replaced when dealing with different valve core push rods, so as to have a wider application range. The guide sleeve 4 and the pressing member are respectively arranged at both ends of the limiting sleeve 3 to limit the valve core push rod therein. Among them, the pressing member is used to limit the axial movement of the limiting sleeve 3, and the guide sleeve 4 is used to limit the radial movement of the limiting sleeve 3. Therefore, it plays a fastening role when grinding the valve core push rod.

[0023] When dealing with the valve core push rod, the holding cylinder 1 can be held manually to grind the valve core push rod, or the holding cylinder 1 can be clamped by equipment for grinding work. This embodiment does not make specific restrictions on this.

[0024] Specifically, in the exemplary embodiment, the guide sleeve 4 and the holding cylinder 1 are connected in a threaded manner, which is convenient for adjusting the protruding length of the valve core push rod to be ground. Of course, the guide sleeve 4 and the holding cylinder 1 can also be connected by clamping or other detachable methods.

[0025] It should be noted that the holding cylinder 1 includes a cylinder body 11. A plurality of installation grooves 12 are circumferentially formed at the top of the cylinder body 11 for installing an end cover 2 to protect the pressing member and prevent accidental contact with the pressing member. On the basis of ensuring safety, it can also prevent the pressing member from loosening when accidentally touched, thereby affecting the length of the defined valve core push rod and the final processing effect of the valve core push rod.

[0026] Magnets can be installed at the bottom of the installation groove 12 and the insertion end of the end cover 2, so that after the end cover 2 is inserted into the installation groove 12, it can be firmly adsorbed to avoid falling off; or a buckle can be set to clamp the end cover 2 on the installation groove 12 to achieve firm assembly.

[0027] In some of these embodiments, the pressing member includes a base 5 and a lifting member 6. The base 5 is installed inside the holding cylinder 1. Threaded holes are formed in the base 5. The lifting member 6 sequentially passes through the top surface of the holding cylinder 1 and the base 5, and is threadedly connected to the base 5 through the threaded holes. The bottom end is used to press against the limiting sleeve 3. Among them, the lifting member 6 includes a knob disk 61, a screw rod 62, and a first abutting plate 63. One end of the screw rod 62 is connected to the knob disk 61, and the screw rod 62 is threadedly connected to the base 5. The top of the first abutting plate 63 is connected to the other end of the screw rod 62. The knob disk 61 is located above the barrel body 11 and inside the end cap 2. The first abutting plate 63 is located inside the limiting sleeve 3 and is used to press against the bottom of the valve core ejector rod to be repaired. The assembler can adjust the position of the valve core ejector rod to be repaired by rotating the knob disk 61.

[0028] Among them, the base 5 and the holding cylinder 1 can be an integral structure. On the other hand, since the screw rod 62 is threadedly connected to the base 5, and the limiting sleeve 3 for loading the valve core ejector rod to be repaired will inevitably be subjected to circumferential forces during grinding, which will cause the screw rod 62 to rotate slightly, resulting in a change in the protruding length of the valve core ejector rod to be repaired. Therefore, the top of the knob disk 61 can be drivingly connected to a small servo motor, and the small servo motor is installed on the top of the barrel body 11 through a bracket and is used to drive the rotation of the knob disk 61. After the valve core ejector rod to be repaired extends to the specified length, the servo motor stops working and locks the current position, which can effectively reduce the grinding error.

[0029] Further, as shown in the attached Figure 1 of the present invention, the knob disk 61 is horizontally arranged. The operator needs to open the end cap 2 to adjust the position of the first abutting plate 63. In another embodiment, a part of the end cap 2 can adopt a closed cavity. The knob disk 61 is replaced with a gear or a turntable circumferentially provided with anti-slip grooves. A rectangular through hole is opened on the end cap 2, and a part of the gear or the turntable here extends out of the end cap 2 through the rectangular through hole. At this time, when the operator needs to adjust the position of the first abutting plate 63, there is no need to open the end cap 2 anymore. Further, the gear or the turntable circumferentially provided with anti-slip grooves can be changed to be vertically arranged and drivingly connected to the screw rod 62, which is convenient for the operator to hold the holding cylinder 1 and adjust the position of the first abutting plate 63 by rotating the gear or the turntable circumferentially provided with anti-slip grooves with the thumb.

[0030] In some other embodiments, a sliding groove can be opened on the inner surface of the limiting sleeve 3, and a sliding block is arranged on the outer surface of the lifting member 6. Through the cooperation of the sliding groove and the sliding block, the lifting member 6 can move up and down in the vertical direction, and the position of the valve core ejector rod to be repaired can also be adjusted.

[0031] Preferably, an elastic member is arranged at the abutting end of the lifting member 6 to prevent the limiting sleeve 3 from sliding.

[0032] Specifically, the elastic member is preferably a rubber pad 64. The rubber pad 64 is made of a soft material and will not damage the rod body, and has a large surface friction force, so it will not slip.

[0033] Preferably, both the holding cylinder 1 and the limiting sleeve 3 are made of transparent materials, and a scale table 9 is also marked on the holding cylinder 1 for reading the length of the to-be-ground end of the valve core push rod to be ground extending out.

[0034] Specifically, in practical applications, first, the bottom of the valve core push rod to be ground is fixed on the limiting sleeve 3, and then one end of the limiting sleeve 3 is clamped on the axial clamping assembly 7, and the rod body is clamped on the radial clamping assembly 8. At this time, the valve core push rod to be ground is completely placed inside the tooling. Rotate the knob disk 61 to move the screw rod 62 up or down, thereby driving the valve core push rod to be ground up or down until the to-be-ground end of the valve core push rod to be ground is flush with the bottom surface of the guide sleeve 4. At this time, read the horizontal position scale of the bottom surface of the valve core push rod to be ground. Then, rotate the knob disk 61 to move the valve core push rod to be ground down so that its to-be-ground end extends out from the bottom of the guide sleeve 4. While rotating the knob disk 61, the user can know the length of the to-be-ground end of the valve core push rod to be ground by observing the horizontal scale of the bottom surface of the valve core push rod to be ground. Compared with the prior art that requires real-time measurement, the technical solution of the present invention only needs to observe the position of the bottom surface of the valve core push rod to be ground on the scale table 9 and does not need to measure repeatedly.

[0035] Preferably, the valve core push rod grinding tooling further includes an end cover 2, which is covered on the top of the holding cylinder 1 by plugging.

[0036] Specifically, the end cover 2 includes a cover plate 21 and a positioning plug 22. Among them, the positioning plug 22 can be plugged inside the installation groove 12. Of course, the end cover can also be connected to the holding cylinder 1 by screwing or other detachable connection methods. For example, a magnet is installed on one side of the positioning plug 22 away from the cover plate 21, and a magnet is also installed inside the corresponding installation groove 12, and the two are firmly plugged by using the principle of mutual adsorption between the magnets.

[0037] Preferably, the valve core push rod grinding tooling further includes an axial clamping assembly 7. The axial clamping assembly 7 is installed at the bottom of the lifting member 6 and is used for clamping the bottom of the valve core push rod to be ground.

[0038] Specifically, the axial clamping assembly 7 includes clamping plates 71, a second abutting plate 72 and abutting blocks 73. The clamping plates 71 are circumferentially and evenly installed on the bottom surface of the first abutting plate 63, and the second abutting plate 72 is installed at one end of the clamping plates 71 away from the first abutting plate 63; the abutting blocks 73 are installed on the inner wall of the holding cylinder 1. Among them, there are multiple clamping plates 71, preferably three, and they are circumferentially and evenly installed on the bottom surface of the first abutting plate 63. The number of the abutting blocks 73 is the same as that of the clamping plates 71 and they correspond one by one.

[0039] Furthermore, during specific use, the second abutment plate 72 and the abutment block 73 are in a separated state, one end of the limiting sleeve 3 stretches out the clamping plate 71, first abuts against the first abutment plate 63, and then the knob disk 61 is rotated to adjust the extended length, the limiting sleeve 3 moves downward, the second abutment plate 72 and the abutment block 73 abut, the clamping plate 71 is tightened, the axial fixation of the limiting sleeve 3 is completed, and it is stopped when the extended length is adjusted.

[0040] Furthermore, one side surface of the second abutment plate 72 and the abutment block 73 is opened into an arc shape, so that the relative sliding is smoother and the abutment block 73 is avoided. The cross-section of the abutment block 73 is a trapezoid, and the long side is located on the side close to the second abutment plate 72, and the short side is located on the side away from the second abutment plate 72. This arrangement makes it possible for the second abutment plate 72 to pass over the long side of the abutment block 73 without generating friction with the abutment block 73, thereby achieving a labor-saving effect.

[0041] Preferably, the bottom surface formed by the axial clamping assembly 7 at the bottom of the lifting member 6 has the same radius as the bottom surface of the limiting sleeve 3. In another embodiment, the bottom surface formed by the axial clamping assembly 7 at the bottom of the lifting member 6 may also be slightly larger than the bottom surface radius of the limiting sleeve 3, so that the axial clamping assembly 7 can clamp limiting sleeves 3 of more sizes. When the second abutment plate 72 on the axial clamping assembly 7 is not in abutment with the abutment block 73, the shape formed by the three clamping plates 71 should be an inverted truncated cone, so that the clamping plates 71 themselves have a certain clamping effect. After the limiting sleeve 3 is inserted, the clamping plates 71 perform preliminary clamping to prevent the limiting sleeve 3 from falling when the operator adjusts the knob 61 or the axial clamping assembly 7 is not clamped in place.

[0042] Specifically, the bottom of the sleeve 3 to be limited can be completely "wrapped" inside the axial clamping assembly 7, thereby preventing radial movement during installation, movement, and grinding to avoid errors.

[0043] Preferably, the valve core push rod grinding tool also includes a radial clamping assembly 8, which is arranged inside the guide sleeve 4 and is used to clamp the rod body of the valve core push rod to be ground. Specifically, the radial clamping assembly 8 includes a clamping block 81 and a spring 84, the clamping block 81 is evenly arranged on the inner wall of the guide sleeve 4 in the circumferential direction, and the clamping end of the clamping block 81 is provided with an arc groove 82, and the surface is provided with a spring hole 83, and the spring 84 passes through the spring holes 83 of multiple clamping blocks 81 in sequence, wherein the clamping block 81 is provided with multiple, preferably three.

[0044] Further, in specific applications, under the action of the spring 84, multiple clamping blocks 81 abut against the inner wall of the guide sleeve 4. When installing the guide sleeve 4, the deeper the guide sleeve 4 is screwed into the limit sleeve 3, the tighter the clamping blocks 81 are clamped under the action of elasticity. The assembler can flexibly adjust according to the actual required extension length. To prevent the radial clamping assembly 8 from falling off the inside of the guide sleeve 4 when the guide sleeve 4 is installed or removed, as shown in the attached drawings of the specification of the present invention Figure 4 As shown, the lower part of the guide sleeve 4 is an inverted frustum shape, and the upper part is a cylinder, and the bottom radius of the cylinder is smaller than the top radius of the frustum. Thus, when in use, when the radial clamping assembly 8 slides to the limit position, it will be stuck inside the guide sleeve 4 and will not fall off.

[0045] Further, under the action of the limit sleeve 3, the axial clamping assembly 7 and the radial clamping assembly 8, when the valve core ejector rod is being ground, it is not easily affected by external forces, resulting in a change in its position, ensuring the grinding accuracy and eliminating the need for multiple measurements and corrections.

[0046] Preferably, a gasket is installed on the surface of the clamping end of the radial clamping assembly 8 to prevent the valve core ejector rod from sliding.

[0047] Specifically, the gasket can also effectively protect the rod body of the limit sleeve 3, reduce unnecessary wear, and also prevent the valve core ejector rod fixed inside the limit sleeve 3 from sliding during grinding.

[0048] When the valve core ejector rod grinding tooling of the present invention is in use, one end of the valve core ejector rod to be ground is placed inside the limit sleeve 3, the limit sleeve 3 is abutted against the lifting member 6, and clamped by the axial clamping assembly 7. Then, the lifting member 6 is adjusted, and the scale is observed to adjust the valve core ejector rod to be ground to an appropriate position. Then, the guide sleeve 4 is installed, and the rod body of the limit sleeve 3 is fixed by the radial clamping assembly 8 inside the guide sleeve 4. The valve core ejector rod at the end to be ground extends out of the guide sleeve 4 through the through hole on the guide sleeve 4, and the extension length is equal to the length to be ground. At this time, the assembler can hold the tooling in a vertical state and grind the end to be ground of the valve core ejector rod with a grinding disc or sandpaper. When the bottom of the guide sleeve 4 contacts the grinding disc or sandpaper, it means that the grinding is completed. There is no need to repeat the measurement, and during the grinding process, due to the action of the limit sleeve 3, the axial clamping assembly 7 and the radial clamping assembly 8, the valve core ejector rod to be ground will not change its position, reducing the error and greatly improving the grinding efficiency.

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention.

[0050] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0051] In the present invention, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or communicable with each other; it may be directly connected, or indirectly connected through an intermediate medium, and may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0053] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as a limitation on the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A grinding tool for a valve core push rod, characterized in that, Comprising: A holding cylinder (1); A limiting sleeve (3), arranged inside the holding cylinder (1), and a valve core ejector rod to be ground is inserted at one end; A guide sleeve (4), detachably installed at the bottom of the limiting sleeve (3), and the guide sleeve (4) is formed with a guide hole for the valve core ejector rod to be ground to pass through; A pressing member, the bottom end of which abuts against one end of the limiting sleeve (3).

2. The valve core ejector rod grinding tooling according to claim 1, characterized in that The pressing member comprises: A base (5), installed inside the holding cylinder (1), and a threaded hole is formed on the base (5); A lifting member (6), sequentially passing through the top surface of the holding cylinder (1) and the base (5), threadedly connected to the base (5) through the threaded hole, and the bottom end is used to press the limiting sleeve (3).

3. The valve core ejector rod grinding tooling according to claim 2, wherein, The lifting member (6) comprises: A knob disc (61); A screw rod (62), one end of which is connected to the knob disc (61), and the screw rod (62) is threadedly connected to the base (5); A first abutting plate (63), the top of which is connected to the other end of the screw rod (62).

4. The valve core ejector rod grinding tooling according to claim 1, characterized in that, Both the holding cylinder (1) and the limiting sleeve (3) are made of transparent materials, and a scale table (9) is also marked on the holding cylinder (1) for reading the length of the end to be ground of the valve core ejector rod extending out.

5. The valve core ejector rod grinding tooling according to claim 1, characterized in that Also comprising: An end cover (2), covering the top of the holding cylinder (1) by insertion.

6. The valve core ejector rod grinding tooling according to claim 3, characterized in that, Also comprising: An axial clamping assembly (7), installed at the bottom of the lifting member (6) for clamping the limiting sleeve (3).

7. The valve core ejector rod grinding tooling according to claim 6, characterized in that, The axial clamping assembly (7) comprises: Clamping plates (71), circumferentially and uniformly installed on the bottom surface of the first abutting plate (63); A second abutting plate (72), installed at one end of the clamping plates (71) away from the first abutting plate (63); An abutting block (73), installed on the inner wall of the holding cylinder (1).

8. The valve core ejector rod grinding tooling according to claim 7, characterized in that, The bottom surface surrounded by the axial clamping assembly (7) at the bottom of the lifting member (6) has the same radius as the bottom surface of the limiting sleeve (3).

9. The valve core ejector rod grinding tooling according to claim 1, characterized in that Also comprising: A radial clamping assembly (8), and the radial clamping assembly (8) comprises: Clamping blocks (81), circumferentially and uniformly arranged on the inner wall of the guide sleeve (4), and an arc-shaped groove (82) is formed at the clamping end of the clamping blocks (81), and a spring hole (83) is formed on the surface; Springs (84), sequentially passing through the spring holes (83) of the plurality of clamping blocks (81).

10. The valve core ejector rod grinding tooling according to claim 9, characterized in that, A gasket is installed on the surface of the clamping end of the radial clamping assembly (8).

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