Installation auxiliary tool, sealing ring installation method and ejector manufacturing method

Abstract

The installation auxiliary tool comprises an inserting part, the inserting part comprises a smooth matching face, and the smooth matching face is located at the end of the inserting part; the insertion part can be inserted into a hole part of an external workpiece, the workpiece is further provided with a cavity, the hole part is provided with a through opening in the position where the cavity wall of the cavity is limited in a penetrating mode, the sealing ring is located in the cavity, the through opening can be filled with the smooth matching face, and the sealing ring can abut against the smooth matching face. According to the scheme, the situation that the sealing ring is cut in the installation process can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of component installation, and in particular to an auxiliary installation tool for a sealing ring and a method for installing the sealing ring. Background Art

[0002] Usually, a sealing ring is arranged in a device where fluid flows to improve the sealing performance of the fluid device. During the assembly process of the fluid device, how to reduce the damage to the sealing ring is a technical problem that needs to be solved urgently. Summary of the invention

[0003] The purpose of the present application is to provide an auxiliary tooling for installing a sealing ring and a method for installing a sealing ring, which can improve the situation where the sealing ring is cut and damaged during the installation process.

[0004] The present application provides an installation auxiliary tool for a sealing ring, the installation auxiliary tool comprising an insertion portion, the insertion portion comprising a smooth matching surface, and the smooth matching surface is located at an end of the insertion portion;

[0005] The insertion portion can be inserted into a hole portion of an external workpiece, the workpiece also has a cavity, the hole portion has a through opening at a position that penetrates the cavity wall that defines the cavity, the sealing ring is located in the cavity, the smooth mating surface can fill the through opening, and the sealing ring can abut against the smooth mating surface.

[0006] The present application also provides a method for installing a sealing ring, which is equipped with an auxiliary tool for installing the sealing ring described in any one of the above items;

[0007] First, insert the insertion portion of the auxiliary installation tool into the hole portion of the workpiece;

[0008] After the sealing ring passes over the through-hole, it is assembled into place;

[0009] Remove the auxiliary installation tooling.

[0010] The present application also provides a method for manufacturing an injector, the injector comprising a valve body and a sealing ring, the valve body comprising a hole portion and a cavity, the hole portion having the through-hole at a position penetrating a cavity wall defining the cavity, the method for manufacturing the injector comprising:

[0011] First, insert the inserting part of the auxiliary installation tool into the hole of the valve body;

[0012] Position the sealing ring beyond the through opening;

[0013] Remove the auxiliary installation tooling.

[0014] The installation auxiliary tooling in the present application has a smooth mating surface of the insertion part that can fill the through-hole at the intersection of the cavity and the hole, and can seal or block the position of the through-hole. When the sealing ring passes through the through-hole of the hole during the installation process, it abuts against the smooth mating surface of the insertion part, reducing or avoiding the sealing ring from recovering its deformation, and improving the situation where the sealing part is cut and damaged by the cutting edge formed by the intersecting edges. After the sealing ring passes over the hole, the installation auxiliary tooling can be disassembled. It can be seen that the smooth mating surface of the installation auxiliary tooling can seal the through-hole and reduce or eliminate the damage to the sealing part caused by the cutting edge, so as to protect the sealing ring during the installation process of the sealing ring and prevent the sealing ring from being scratched.

[0015] The installation method of the sealing ring in the present application is to first insert the insertion part of the installation auxiliary tooling into the hole of the workpiece, and then remove the installation auxiliary tooling after the sealing ring passes the through-opening. The smooth mating surface of the installation auxiliary tooling can seal the through-opening to reduce or eliminate the damage to the sealing component caused by the cutting edge, so as to protect the sealing ring during the installation process of the sealing ring and prevent the sealing ring from being scratched.

[0016] The manufacturing method of the injector in the present application is to first insert the insertion part of the installation auxiliary tooling into the hole part of the valve body, and then remove the installation auxiliary tooling after the sealing ring passes the position of the through-portion. The smooth mating surface of the installation auxiliary tooling can seal the through-portion to reduce or eliminate the damage to the sealing ring caused by the cutting edge, so as to protect the sealing ring during the installation process of the sealing ring and prevent the sealing ring from being scratched, thereby facilitating improving the sealing performance of the injector. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the ejector in the embodiment of the present application;

[0018] Figure 2 for Figure 1 A schematic axial cross-sectional view of the middle injector;

[0019] Figure 3 This is a schematic diagram of installing auxiliary tooling in an embodiment of the present application;

[0020] Figure 4 for Figure 3 A schematic diagram showing another perspective of installing the auxiliary tooling;

[0021] Figure 5 for Figure 4 Schematic diagram of the left side;

[0022] Figure 6 for Figure 1 A schematic diagram of a portion of a valve body of a middle injector;

[0023] Figure 7 for Figure 6 Schematic diagram of the middle valve body and installation auxiliary tooling after assembly;

[0024] Figure 8 for Figure 7 A schematic cross-sectional view along the axial direction;

[0025] Fig. 9 This is a schematic diagram of installing auxiliary tooling in another embodiment of the present application;

[0026] Fig.10 for Fig. 9 Schematic diagram of installing auxiliary tooling from another angle.

[0027] Figure 1-10 The reference numerals in the drawings are described as follows:

[0028] 100 - ejector;

[0029] 101-valve body; 101a-hole portion; 101a1-through opening; 101b-first fixing hole; 101c-first positioning hole; 101d-cavity;

[0030] 102-injection nozzle; 102a-annular groove;

[0031] 103-seal ring;

[0032] 104- control head;

[0033] 200-Installation of auxiliary tooling;

[0034] 201-fixing part; 201a-second fixing hole; 201b-second positioning hole; 2011-first arm part; 2012-second arm part;

[0035] 202-insertion part; 2021-smooth mating surface. DETAILED DESCRIPTION

[0036] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] This embodiment provides an auxiliary tool 200 for installing a sealing ring 103. The sealing ring 103 is installed in a cavity 101d of a workpiece. When the sealing ring 103 is installed in the cavity 101d, the auxiliary tool 200 provides assistance. The workpiece has a hole portion 101a that passes through the cavity wall of the cavity 101d. The hole portion 101a has a through hole 101a1 at a position that passes through the cavity wall defining the cavity 101d. The through hole 101a1 is a port of the hole portion 101a.

[0038] Specifically, please refer to Figure 1 , 2 , Figure 1 This is a schematic diagram of the structure of the ejector 100 in the embodiment of the present application; Figure 2for Figure 1 FIG. 1 is an axial cross-sectional view of the injector 100 .

[0039] In this embodiment, the workpiece is specifically an injector 100, which includes a valve body 101 and a control head 104. The valve cavity of the valve body 101 is the cavity 101d of the workpiece, and the cavity 101d of the valve body 101 extends along the axial direction of the valve body 101. Figure 2 From the perspective, the cavity 101d extends up and down, and the up and down direction is the axial direction. At this time, the valve body 101 is also provided with a transverse connecting channel extending in the radial direction. The connecting channel is the hole portion 101a of the workpiece. The hole portion 101a is perpendicular to the cavity wall of the cavity 101d in the radial direction and penetrates the cavity wall of the cavity 101d. The circle where the hole wall of the hole portion 101a and the cavity wall of the cavity 101d are connected is a curved contour, which is generally also defined as an intersecting edge. The intersecting edge is the position where the hole portion 101a and the cavity 101d meet. In other embodiments, the workpiece can be a valve body of a control valve, or a structure such as a flow channel plate in a thermal management system.

[0040] Look again Figures 3 to 8 , Figure 3 A schematic diagram of installing the auxiliary tooling 200 in an embodiment of the present application; Figure 4 for Figure 3 A schematic diagram of another perspective of installing the auxiliary tooling 200; Figure 5 for Figure 4 Left view of

[0041] Figure 6 for Figure 1 A schematic diagram of a portion of a valve body 101 of an injector 100; Figure 7 for Figure 6 A schematic diagram of the middle valve body 101 and the installation auxiliary tooling 200 after being assembled; Figure 8 for Figure 7 A cross-sectional view along the axial direction.

[0042] The installation auxiliary tool 200 in this embodiment includes an inserting portion 202 for inserting into the hole portion 101a of the valve body 101. Figure 3 , 4 The middle inserting portion 202 is a columnar structure, and one end face of the inserting portion 202 is a smooth mating surface 2021, which is inserted into the valve body 101 and faces the through opening 101a1 (shown in FIG. Figure 8), the smooth mating surface 2021 and the through-opening 101a1 of the hole portion 101a are adapted. The adaptation of the present application means that the smooth mating surface 2021 and the through-opening 101a1 have the same shape. When the insertion portion 202 is inserted into the hole portion 101a, the smooth mating surface 2021 seals the through-opening 101a1, and the smooth mating surface 2021 and the cavity wall of the cavity 101d around the hole portion 101a are connected together, so that the cavity wall of the cavity 101d at the hole portion 101a is a smooth curved surface, or in other words, the outer peripheral contour of the smooth mating surface 2021 and the intersecting edge are connected together. At this time, the cavity wall of the valve body 101 is equivalent to the state before being penetrated by the hole portion 101a, or is close to the state before being penetrated by the hole portion 101a. At the position of the hole portion 101a, the cavity wall of the valve body 101 presents a relatively complete and smooth wall.

[0043] like Figure 2 , 8 As shown, the injector 100 further includes an injection nozzle 102, the side wall of the injection nozzle 102 is provided with an annular groove 102a, a sealing ring 103 is installed in the annular groove 102a, the sealing ring 103 surrounds the injection nozzle 102, and can be installed in the cavity 101d of the valve body 101 together with the injection nozzle 102. Figure 8 From a viewing angle, the injection nozzle 102 can be installed from top to bottom along the axial direction. In order to achieve the seal between the injection nozzle 102 and the valve body 101, the sealing ring 103 will be pressed radially between the injection nozzle 102 and the inner wall of the valve body 101 after the assembly is completed. Therefore, when the injection nozzle 102 is installed with the sealing ring 103, the sealing ring 103 will be squeezed by the cavity wall of the cavity 101d during the assembly process. When it reaches the position of the through hole 101a1 where the hole 101a penetrates the cavity wall of the cavity 101d, since there is no longer any cavity wall pressure, the sealing ring 103 is pressed. 03 will recover the deformation, that is, recover the deformation toward the inside of the hole 101a. At this time, if there is no installation auxiliary tooling 200, the edge of the through hole 101a1, that is, the intersecting edge, will form a cutting edge, thereby cutting the sealing ring 103. Part of the sealing ring 103 may be sheared off at this position, resulting in sealing failure. In addition, the sealing ring 103 in this embodiment is sleeved in the annular groove 102a on the side wall of the injection nozzle 102. The side wall edge of the annular groove 102a and the intersecting edge are combined to make it easier to cut the sealing ring 103. When the cavity wall size of the cavity 101d is small, it is not conducive to the processing of the cutting edge. The embodiment of the present invention can reduce the damage of the cutting edge to the sealing ring 103 by arranging the installation auxiliary tooling 200, which is convenient for simplifying the manufacturing difficulty of the injector 100.

[0044] After the installation auxiliary tool 200 of this embodiment is provided, when installing the injection nozzle 102, the insertion portion 202 of the installation auxiliary tool 200 can be first inserted into the hole portion 101a on the side of the valve body 101, such as Figure 7 , 8As shown, the smooth mating surface 2021 of the inserting part 202 seals the through-port 101a1 of the valve body 101, so that the cavity wall of the cavity 101d remains flat at the position where the hole portion 101a is opened, and no cutting edge is formed. Then the injection nozzle 102 equipped with the sealing ring 103 is installed from top to bottom. When the sealing ring 103 passes through the through-port 101a1 of the hole portion 101a, it abuts against the smooth mating surface 2021 of the inserting part 202. The sealing ring 103 will not recover its deformation, nor will it be cut and damaged by the cutting edge formed by the intersecting edge. After the sealing ring 103 is installed in place along the axial direction across the hole portion 101a, the installation auxiliary tooling 200 can be disassembled. It can be seen that the smooth mating surface 2021 of the installation auxiliary tooling 200 can seal the through-port 101a1 and eliminate the cutting edge, so as to protect the sealing ring 103 during the installation process of the sealing ring 103 and prevent the sealing ring 103 from being scratched.

[0045] The above description uses the injector 100 as an example. It can be seen that the workpiece installed with the sealing ring 103 is not limited to the injector 100. As long as the workpiece cavity 101d is also connected to the hole portion 101a with different extension directions, and then there is a situation where the through hole 101a1 forms an intersecting edge, if the installation of the sealing ring 103 needs to cross the position of the intersecting edge, the above-mentioned installation auxiliary tooling 200 can be provided to achieve the purpose of preventing the sealing ring 103 from being scratched.

[0046] Specifically, in this embodiment, the cavity 101d of the valve body 101 is a cylindrical hole, and the cavity wall portion of the cavity 101d through which the hole portion 101a passes is an arc wall, that is, the cavity wall lacks an arc wall at the position of the through hole 101a1. At this time, the smooth matching surface 2021 is correspondingly an arc surface, and the edge profile of the arc surface is a curve, that is, a profile consistent with the intersecting edge. The cylindrical cavity 101d is provided on the valve body 101, which is conducive to the smooth matching with the injection nozzle 102.

[0047] The hole 101a as the connection channel of the valve body 101 is generally a cylindrical hole, and the insertion part 202 is also set to be cylindrical, so that it is easy to insert and match with the hole 101a, which is conducive to the positioning of the insertion part 202. However, it can be understood that the installation auxiliary tool 200 mainly relies on its smooth matching surface 2021 to seal the through-portion 101a1, so in fact, the insertion part 202 as a whole does not have to be completely adapted to the shape of the hole 101a, as long as the smooth matching surface 2021 can be adapted to the through-portion 101a1.

[0048] Furthermore, if Figure 1As shown, the valve body 101 is also provided with a first fixing hole 101b, and the first fixing hole 101b is provided near the hole portion 101a. As mentioned above, the hole portion 101a is used as a connecting channel. During the actual use of the injector 100, the hole portion 101a will connect the joint to establish the connection between the hole portion 101a and the external component. The first fixing hole 101b is provided for fixing the joint. At this time, the installation auxiliary tooling 200 also includes a fixing portion 201, and the fixing portion 201 is provided with a second fixing hole 201a, so as to insert a fastener into the first fixing hole 101b, and the second fixing hole 201a is positioned with the valve body 101 of the injector 100. In this embodiment, the fixing part 201 is specifically a plate structure, one end of the insertion part 202 is connected to the plate surface of the plate structure, the plate structure is against the outer surface of the valve body 101, the fasteners can be screws, bolts, etc., the first fastening hole and the second fastening hole are both threaded holes, the fasteners can lock the fixing part 201 and the valve body 101 to facilitate the positioning of the insertion part 202, so that the smooth mating surface 2021 is maintained at the position of the through-portion 101a1, so as to prevent the smooth mating surface 2021 from leaving the through-portion 101a1 when the sealing ring 103 is pressed.

[0049] In order to ensure that the smooth mating surface 2021 is located at the position of the through-portion 101a1, the length of the insertion portion 202 can be set to be equal to the length of the hole portion 101a. The fixing portion 201 is a plate structure, which is more reliably positioned when it rests against the outer surface of the valve body 101. Of course, the fixing portion 201 can also be other structural forms, such as a rod-shaped, fixed bracket, etc.

[0050] In addition, the valve body 101 in this embodiment is also provided with a first positioning hole 101c, and the fixing part 201 is provided with a second positioning hole 201b, so that the fixing part 201 and the valve body 101 are positioned by inserting the positioning member into the first positioning hole 101c and the second positioning hole 201b. As mentioned above, the valve body 101 is provided with a first fixing hole 101b for fixing with the joint, and before fixing, the valve body 101 is also provided with a first positioning hole 101c for pre-positioning the joint first, then at this time, the installation auxiliary tooling 200 can also be provided with a matching second positioning hole 201b, and the positioning member is, for example, a positioning pin, which can be inserted into the first positioning hole 101c and the second positioning hole 201b to pre-position the fixing part 201.

[0051] It can be seen that the installation auxiliary tooling 200 in this embodiment uses the first positioning hole 101c and the first fixing hole 101b existing in the valve body 101 itself to achieve pre-positioning and fixing. Such a fixing and positioning method is simple and reliable, and no other changes need to be made to the valve body 101. It can be seen that if the workpiece itself does not have the first positioning hole 101c and the first fixing hole 101b, a corresponding matching design can also be specially made to add the first positioning hole 101c and the first fixing hole 101b. Of course, the fixing method of the installation auxiliary tooling 200 is not limited to this, for example, it can also be fixed to other positions. In fact, the installation auxiliary tooling 200 is not limited to setting the fixing part 201. For example, during the installation process, the end of the insertion part 202 away from the through hole 101a1 can extend out of the hole part 101a and abut against the corresponding other tooling along its length direction, or a fixing part 201 is set, but the fixing part 201 can be fixed to the work surface, or fixed by other tooling, etc.

[0052] In this embodiment, the fixed part 201 and the plug-in part 202 of the installation auxiliary tooling 200 can be integrally arranged, and the structure is more reliable; or, the plug-in part 202 can also be limitedly connected to the fixed part 201, for example, the fixed part 201 is provided with a blind hole, one end of the plug-in part 202 is inserted into the fixed part 201 and cannot rotate, and its smooth mating surface 2021 can also be positioned at the position of the through-opening 101a1 that needs to be mated, and this structure is easy to process and load and unload; or, the plug-in part 202 and the fixed part 201 can also be fixedly connected, for example, fixed to the fixed part 201 by tightening bolts, etc., which is more convenient to operate and relatively reliable to fix.

[0053] It should be known that the edge of the through-hole 101a1 is the above-mentioned intersecting edge, and the intersecting edge is not a symmetrical structure relative to the axis of the hole portion 101a. In other words, the insertion portion 202 must be inserted into the hole portion 101a at a specific angle to ensure the smooth matching surface 2021 is compatible with the through-hole 101a1. For different types of workpieces, the positions of the first positioning hole 101c and the first fixing hole 101b may be different. In order to increase the application range of the installation auxiliary tooling 200, the fixing portion 201 in this embodiment is provided with two groups of second fixing holes 201a and second positioning holes 201b. Figure 7 As shown, the fixing part 201 is a rectangular plate structure. The fixing part 201 in this embodiment is an L-shaped plate structure, including a first arm 2011 and a second arm 2012 perpendicular to each other, a group of second fixing holes 201a and second positioning holes 201b are arranged on the first arm 2011, and another group of second fixing holes 201a and second positioning holes 201b are arranged on the second arm 2012. Figure 7For the perspective, if the first positioning hole 101c and the first fixing hole 101b are located at the position after rotating 90°, then another group of second positioning holes 201b and second fixing holes 201a can be used at this time. It can be seen that this type of installation auxiliary tooling 200 can be adapted to different workpieces to increase the flexibility of the application of the installation auxiliary tooling 200. Obviously, the installation auxiliary tooling 200 can also be provided with more groups of second fixing holes 201a and second positioning holes 201b. In addition, as mentioned above, the insertion portion 202 and the fixing portion 201 can also be detachably connected, then the relative position of the insertion portion 202 and the fixing portion 201 can be changed as needed, which can also make the application more flexible.

[0054] You can refer to Fig. 9 , 10 , Fig. 9 This is a schematic diagram of installing an auxiliary tooling 200 in another embodiment of the present application; Fig.10 for Fig. 9 A schematic diagram showing another angle of installing the auxiliary tooling 200.

[0055] The working principle of the installation auxiliary tooling 200 in this embodiment is the same as that of the above embodiment, except that the installation auxiliary tooling 200 in this embodiment does not have more second positioning holes 201b and second fixing holes 201a, and its fixing portion 201 is roughly rectangular and only has one set of second positioning holes 201b and second fixing holes 201a.

[0056] As can be seen from the above embodiments, the embodiments of the present application mainly utilize the smooth mating surface 2021 of the inserting portion 202 of the auxiliary tooling 200 to eliminate the cutting edge of the intersecting edge as much as possible and reduce the damage to the sealing ring 103. However, it can be seen that, in an ideal state, the radial dimension of the inserting portion 202 is equal to the diameter of the hole portion 101a, that is, both are equal to the preset diameter, then the smooth mating surface 2021 can be butted against the intersecting edge to seal the through-portion 101a1, and the cutting edge is eliminated.

[0057] However, in order to allow the insertion part 202 to be inserted into the hole part 101a more smoothly, the radial dimension of the insertion part 202 can be set to be smaller than the preset diameter, that is, smaller than the diameter of the hole part 101a. At this time, the smooth mating surface 2021 of the insertion part 202 does not completely seal the through-opening 101a1, and the cutting edge cannot be completely eliminated. The length of the insertion part 202 that can be inserted into the hole part 101a can be set to be longer than the preset length, and the length of the hole part 101a is equal to the preset length, that is, the length of the insertion part 202 that can be inserted into the hole part 101a is longer than the hole part 101a. After the insertion part 202 is inserted into the hole part 101a, the end of the insertion part 202 can protrude from the through-opening 101a1, and the sealing ring 103 abuts against the smooth mating surface 2021 to reduce damage. Of course, the edge of the smooth mating surface 2021 is rounded or chamfered to reduce scratches on the sealing ring 103 by sharp corners.

[0058] Further, the radial dimension of the insertion part 202 can be defined as smaller than the preset diameter, and the radial dimension of the insertion part 202 is defined as d1, the preset diameter is d2, and the diameter of the sealing ring 103 is d3, which can satisfy: d2-d1=(0.03-0.1)d3. d2-d1 is the gap between the insertion part 202 and the hole part 101a, and the gap is between (0.03-0.1) times the diameter d3 of the sealing ring 103. The gap size is much smaller than the diameter of the sealing ring 103. The sealing ring 103 will not be embedded in the gap when installed at this position, and the sealing ring 103 can smoothly cross the gap position to reduce or prevent the sealing ring 103 from being scratched.

[0059] This embodiment also provides a method for installing the sealing ring 103, which is equipped with the above-mentioned installation auxiliary tool 200 of the sealing ring 103, and the installation steps are as follows:

[0060] First, insert the inserting part 202 of the auxiliary installation tool 200 into the hole 101a of the workpiece to position the inserting part 202. At this time, the smooth matching surface 2021 of the inserting part 202 is matched with the through hole 101a1 to seal the through hole 101a1.

[0061] The specific method of positioning may be to insert a positioning member into the first positioning hole 101c and the second positioning hole 201b to pre-position the fixing portion 201, and then insert a fastener into the first fixing hole 101b and the second fixing hole 201a to fix the fixing portion 201;

[0062] The sealing ring 103 is installed in the cavity 101d of the workpiece. Figure 8 In the process, the injection nozzle 102 carrying the sealing ring 103 is installed from top to bottom into the cavity 101d of the valve body 101. As the injection nozzle 102 is gradually pushed in, the sealing ring 103 passes over the position of the through-hole 101a1 and is assembled into place.

[0063] Then, the installation auxiliary tooling 200 is removed.

[0064] Optionally, the auxiliary installation tooling 200 can be removed after the sealing ring 103 passes over the through opening 101a1, or the auxiliary installation tooling 200 can be removed after the sealing ring 103 passes over the through opening 101a1 and is assembled into place.

[0065] This embodiment also provides a method for manufacturing an injector 100. The injector 100 includes a valve body 101 and a sealing ring 103. The valve body 101 includes a hole portion 101a and a cavity 101d. The hole portion 101a has a through hole 101a1 at a position penetrating a cavity wall defining the cavity 101d. The method for manufacturing the injector 100 includes:

[0066] First, insert the inserting portion 202 of the auxiliary installation tool 200 into the hole 101a of the valve body 101;

[0067] Place the sealing ring 103 over the through opening 101a1;

[0068] Remove and install the auxiliary tooling 200.

[0069] The manufacturing method of the injector in the present application is to first insert the insertion part 202 of the installation auxiliary tooling 200 into the hole part 101a of the valve body, and then remove the installation auxiliary tooling 200 after the sealing ring 103 passes the position of the through-portion 101a1. The smooth mating surface 2021 of the installation auxiliary tooling 200 can block or seal the through-portion 101a1 to reduce or eliminate the damage of the cutting edge to the sealing ring 103, so as to protect the sealing ring 103 during the installation process of the sealing ring 103 and prevent the sealing ring 103 from being scratched, thereby improving the sealing performance of the injector 100.

[0070] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. Install auxiliary tooling to assist in installing the sealing ring. It is characterized in that The auxiliary installation tool comprises an insertion portion, the insertion portion comprises a smooth matching surface, and the smooth matching surface is located at an end of the insertion portion; The insertion portion can be inserted into a hole portion of an external workpiece, the workpiece also has a cavity, the hole portion has a through opening at a position that penetrates the cavity wall that defines the cavity, the sealing ring is located in the cavity, the smooth mating surface can fill the through opening, and the sealing ring can abut against the smooth mating surface.

2. The installation auxiliary tooling according to claim 1, It is characterized in that The length of the insertion portion is greater than or equal to a preset length; The length of the hole portion of the workpiece is equal to the preset length.

3. The installation auxiliary tooling according to claim 1, It is characterized in that Along the circumference of the inserting portion, the radial dimension of the inserting portion is less than or equal to a preset diameter; The hole diameter of the hole portion is equal to the preset diameter.

4. The installation auxiliary tooling according to claim 3, It is characterized in that The radial dimension of the inserting portion is smaller than the preset diameter. The radial dimension of the inserting portion is defined as d1, the preset diameter is defined as d2, the diameter of the sealing ring is defined as d3, and d2-d1=(0.03-0.1)d3.

5. The installation auxiliary tool according to any one of claims 1 to 4, It is characterized in that The smooth matching surface is adapted to the structure of the portion of the cavity wall defining the through-hole, the smooth matching surface comprises an arc-shaped surface, and the portion of the cavity wall penetrated by the through-hole is an arc-shaped wall; Alternatively, the length of the insertion portion is greater than a preset length, and at least a portion of the smooth matching surface can protrude from the cavity wall.

6. The installation auxiliary tool according to any one of claims 1 to 4, It is characterized in that The auxiliary installation tool further includes a fixing portion, and the fixing portion is provided with a second fixing hole; The external workpiece is further provided with a first fixing hole, and the fixing portion can be fixed to the workpiece by inserting a fastener into the second fixing hole and the first fixing hole.

7. The installation auxiliary tool according to claim 6, It is characterized in that The fixing portion is provided with a second positioning hole, and the second positioning hole is spaced apart from the second fixing hole; The external workpiece is also provided with a first positioning hole, and the fixing portion can be inserted into the first positioning hole, the second positioning hole and the workpiece for pre-positioning through a positioning piece.

8. A method for installing a sealing ring, It is characterized in that An auxiliary tooling for installing the sealing ring according to any one of claims 1 to 7 is provided, and the method for installing the sealing ring comprises: First, insert the insertion portion of the auxiliary installation tool into the hole portion of the workpiece; Position the sealing ring beyond the through opening; Remove the auxiliary installation tooling.

9. The method for installing the sealing ring according to claim 8, It is characterized in that The sealing ring is used for an injector, the injector comprises a valve body and an injection nozzle, the workpiece is located at the valve body, the valve body has the cavity, the side wall of the injection nozzle is provided with an annular groove, and the sealing ring is installed in the annular groove; The step of assembling the sealing ring in place after it passes over the through-hole includes: installing the injection nozzle with the sealing ring installed in the cavity and assembling the nozzle in place after it passes over the through-hole.

10. A method for manufacturing an ejector, It is characterized in that The injector comprises a valve body and a sealing ring, the valve body comprises a hole portion and a cavity, the hole portion has the through-hole at a position penetrating a cavity wall defining the cavity, and the manufacturing method of the injector comprises: First, insert the inserting part of the auxiliary installation tool into the hole of the valve body; Position the sealing ring beyond the through opening; Remove the auxiliary installation tooling.

Images