Method for assembling O-shaped ring and valve bonnet

Abstract

The invention discloses an assembling method for an O-shaped ring and a valve bonnet. The assembling method comprises the steps that S1, the O-shaped ring is pressed into the valve bonnet in an inclined posture; and S2, a rotating press-fitting rod extends into the valve bonnet in the axis direction of the valve bonnet so that the O-shaped ring in the inclined posture can be flattened and clamped to the cap top wall of the valve bonnet. According to the assembling method, the assembling effect of the O-shaped ring and the valve bonnet can be improved, and the product reject ratio is reduced.

Description

Technical Field

[0001] This application relates to the technical field of valve component assembly, and particularly to an assembly method for an O-ring and a valve cap. Background Art

[0002] Taking a charging valve as an example, an O-ring is press-fitted inside the valve cap of the charging valve to achieve sealing between the valve cap and the valve body. During assembly, it is necessary to first assemble the O-ring with the valve cap and then assemble the valve cap with other components such as the valve body of the charging valve. Among them, the O-ring is press-fitted with an interference fit into the valve cap, that is, the outer diameter of the O-ring is larger than the inner diameter of the valve cap.

[0003] In the related art, the assembly of the O-ring and the valve cap is carried out manually. The operator first puts the O-ring into the port of the valve cap and then uses a press-fitting mandrel to press the O-ring into the bottom of the valve cap. Generally, it is necessary to press twice continuously with the press-fitting mandrel to make the O-ring flat and press-fitted in place. After all the valve caps and O-rings are assembled, visual inspection is carried out to check whether there is a situation where the valve cap is missing the O-ring, there are too many O-rings installed, or the O-ring is not installed in place.

[0004] In the above method of manually press-fitting the O-ring with a press-fitting mandrel, the O-ring is prone to phenomena such as flanging, wrinkling, or convex corners during the press-fitting process, and it is also prone to the situation of incomplete press-fitting, resulting in a high defective rate of the product. Summary of the Invention

[0005] The purpose of this application is to provide an assembly method for an O-ring and a valve cap, which can improve the assembly effect of the O-ring and the valve cap and reduce the defective rate of the product.

[0006] To solve the above technical problems, this application provides an assembly method for an O-ring and a valve cap, and the assembly method includes the steps:

[0007] S1. Press the O-ring into the valve cap in an inclined posture;

[0008] S2. Insert a rotating press-fitting rod into the valve cap along the axial direction of the valve cap to press the O-ring in the inclined posture flat and clamp it to the top wall of the valve cap.

[0009] In an implementable manner, the step S1 includes:

[0010] Fix the O-ring on the positioning rod, insert the positioning rod with the O-ring fixed thereon into the valve cap and abut it against the top wall, and in this state, the O-ring is located outside the valve cap;

[0011] The positioning rod outer sleeve is provided with a push rod, and the end face of the push rod close to the O-ring is an inclined surface. The push rod is pushed toward the valve bonnet so that the inclined surface of the push rod pushes the O-ring fixed on the positioning rod into the valve bonnet.

[0012] In one achievable manner, in the step S1, when the positioning rod is inserted into the valve bonnet, the axis of the positioning rod coincides with the axis of the valve bonnet.

[0013] In one achievable manner, the positioning rod includes a large diameter section and a small diameter section, the large diameter section is interference fit with the O-ring, the radial dimension of the small diameter section is smaller than the inner diameter of the O-ring, and the small diameter section can abut against the top wall of the valve bonnet.

[0014] In one practicable manner, after the push rod pushes the O-ring into the valve bonnet, the positioning rod and the push rod are moved out of the valve bonnet.

[0015] In one achievable manner, an angle between the inclined surface of the push rod and the axial direction of the push rod is 30° to 60°.

[0016] In one achievable manner, in step S2, the press-fitting rod rotates around its own axis, and the press-fitting rod extends into the valve bonnet at a uniform speed.

[0017] In one achievable manner, in step S2, the press rod is driven to rotate by a reduction motor.

[0018] In one achievable manner, in step S2, when the press-fitting rod is extended into the valve bonnet, the axis of the press-fitting rod coincides with the axis of the valve bonnet.

[0019] In one achievable manner, in step S2, the rod portion of the press-fitting rod extending into the valve bonnet is a circular rod portion, and the diameter of the circular rod portion is smaller than the inner diameter of the valve bonnet and larger than the inner diameter of the O-ring.

[0020] With the above assembly method, the O-ring is first pressed into the valve cap in an inclined posture. Due to the inclination of the O-ring, the press-fitting resistance between the O-ring and the valve cap is greatly reduced, thereby reducing the occurrence of the O-ring breakage, damage or burr during the process; then, the rotating press-fitting rod is extended into the valve cap to flatten the inclined O-ring. Under the action of the rotation and downward pressure of the press-fitting rod, the O-ring can be ensured to be pressed into place, and the O-ring can be prevented from being deformed due to the resistance of the interference fit when pressed in, and the undesirable phenomena such as the convex corner or ejection of the O-ring can be reduced. This assembly method can improve the assembly effect of the valve cap and the O-ring and reduce the product defect rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The flowchart of the assembly method of the O-ring and the valve cap in an embodiment provided by this application;

[0022] Figure 2 The structural schematic diagram of the O-ring installed in the valve cap in an inclined posture in a specific embodiment;

[0023] Figure 3 The structural schematic diagram of the O-ring and the valve cap after being pressed by the pressing rod in a specific embodiment;

[0024] Figure 4 The structural schematic diagram of the first pressing mechanism of the tooling in a specific embodiment;

[0025] Figure 5 For Figure 4 The side view;

[0026] Figure 6 For Figure 4 The structural schematic diagram of the first pressing assembly in

[0027] Figure 7 For Figure 4 The side view;

[0028] Figure 8 The structural schematic diagram of the first pressing assembly pressing the O-ring into the valve cap in a specific embodiment;

[0029] Figure 9 For Figure 8 The partial enlarged view of part A in

[0030] Figure 10 The structural schematic diagram of the second pressing mechanism of the tooling in a specific embodiment;

[0031] Figure 11 For Figure 10 The side view;

[0032] Figure 12 For Figure 10 The structural schematic diagram of the second pressing assembly in

[0033] Figure 13 The structural schematic diagram of the second pressing assembly pressing the O-ring flat in a specific embodiment.

[0034] Explanation of reference numerals:

[0035] The first press-fitting mechanism 100, the first press-fitting assembly 110, the positioning rod 111, the large-diameter section 1111, the small-diameter section 1112, the transition section 1113, the push rod 112, the inclined surface portion 1121, the first mounting bracket 113, the first driving component 114, the transition component 115, the guiding structure 116, the guiding rod 1161, the linear bearing 1162, the connecting member 117, the second driving component 120, the first adapter 130, the first mounting seat 140, the first guiding assembly 150, the first slider 151, the first slide rail 152;

[0036] The second press-fitting mechanism 200, the second press-fitting assembly 210, the press-fitting rod 211, the circular rod portion 2111, the second mounting bracket 212, the third driving component 213, the guiding member 214, the coupling 215, the fixed connecting rod 216, the fourth driving component 220, the second adapter 230, the second mounting seat 240, the second guiding assembly 250, the second slider 251, the second slide rail 252;

[0037] The valve cap 30, the cap top wall portion 31, the O-ring 40. Specific embodiments

[0038] In order to enable those skilled in the art to better understand the solution of this application, the following further detailed description of this application will be given in conjunction with the accompanying drawings and specific embodiments.

[0039] Please refer to Figure 1 , Figure 1 , which is a flowchart of the assembly method of the O-ring and the valve cap in an embodiment provided by this application; Figure 2 It is a schematic structural diagram of the O-ring inserted into the valve cap in an inclined posture in a specific embodiment; Figure 3 It is a schematic structural diagram of the O-ring and the valve cap after the press-fitting rod presses in a specific embodiment.

[0040] In this embodiment, the assembly method of the valve cap 30 and the O-ring 40 includes:

[0041] Step S1: Press the O-ring 40 into the valve cap 30 in an inclined posture; at this time, the structures of the O-ring 40 and the valve cap 30 are as shown in Figure 2 .

[0042] Step S2: Insert the rotating press-fitting rod into the valve cap 30 along the axis direction of the valve cap 30 to press the O-ring 40 in an inclined posture flat and clamp it on the cap top wall portion 31 of the valve cap 30. At this time, the structures of the O-ring 40 and the valve cap 30 are as shown in Figure 3 , and the two have been assembled.

[0043] By adopting the above assembly method, the O-ring 40 is first pressed into the valve cap 30 in an inclined posture. Since the O-ring 40 is inclined, the press-fitting resistance between the O-ring 40 and the valve cap 30 is greatly reduced, thereby reducing the occurrence of the phenomenon such as the breakage, damage or burr of the O-ring 40 in this process; then, the rotating press-fitting rod is extended into the valve cap 30 to press the inclined O-ring 40 flat. Under the action of the rotation and downward pressure of the press-fitting rod, the O-ring 40 can be ensured to be pressed in place, and the O-ring 40 can be prevented from being deformed due to the resistance of the interference fit when pressed in, and the undesirable phenomenon such as the convex corner or popping out of the O-ring 40 can be reduced. This assembly method can improve the assembly effect of the valve cap 30 and the O-ring 40 and reduce the product defect rate.

[0044] The operation of the aforementioned step S1 can be achieved by a positioning rod and a push rod which is sleeved on the positioning rod. Figures 4 to 13 The tooling that can implement the above-mentioned assembly method is provided to illustrate the specific implementation of the above-mentioned assembly method. It can be understood that the tooling used to implement the assembly method is not limited to that shown in the figure.

[0045] In this embodiment, the tooling includes a first press-fitting mechanism 100 and a second press-fitting mechanism 200. The first press-fitting mechanism 100 is used to implement the operation of the aforementioned step S1, and the second press-fitting mechanism 200 is used to implement the operation of the aforementioned step S2.

[0046] like Figures 4 to 9 As shown, the first press-fitting mechanism 100 includes a first press-fitting assembly 110, and the first press-fitting assembly 110 includes a positioning rod 111 and a push rod 112. The push rod 112 is sleeved on the positioning rod 111, and the positioning rod 111 includes an extended end extending out of the push rod 112, and the extended end is used to sleeve the O-ring 40. The end surface of the push rod 112 close to the extended end of the positioning rod 111 is an inclined surface 1121. The push rod 112 can move relative to the positioning rod 111 to push the O-ring 40 sleeved on the positioning rod 111 into the valve cap 30 through its inclined surface 1121.

[0047] In the illustrated orientation, during assembly, the valve bonnet 30 is located below the first press-fit assembly 110. In order to press the O-ring 40 into the valve bonnet 30, the valve bonnet 30 is placed with the opening facing upward. In this placement, the top wall 31 of the valve bonnet 30 is located at the bottom. The axis direction of the positioning rod 111 and the push rod 112 of the first press-fit assembly 110 is the vertical direction. The lower end of the positioning rod 111 is the protruding end extending out of the push rod 112. When the push rod 112 pushes the O-ring 40 into the valve bonnet 30, the push rod 112 moves downward relative to the positioning rod 111.

[0048] It should be noted that the inclined surface 1121 of the push rod 112 can be understood as having an included angle with the extension direction of the push rod 112. The inclined surface 1121 of the push rod 112 determines the inclined posture of the O-ring 40 press-fitted into the valve cap 30 after step S1.

[0049] When operating with the first press-fitting assembly 110, a positioning rod 111 can be used to sleeved an O-ring 40 first. The O-ring 40 is tightly fitted with the positioning rod 111, which can be understood as the O-ring 40 being press-fitted over the positioning rod 111 with interference, so that the O-ring 40 can be in a posture where its center line extends in the vertical direction. After that, the first press-fitting assembly 110 is moved downward together, so that the lower end of the positioning rod 111 extends into the valve cap 30 and abuts against the top wall portion 31 of the valve cap 30 to achieve relative positioning between the valve cap 30 and the positioning rod 111. At this time, the O-ring 40 is outside the valve cap 30. That is to say, when the O-ring 40 is fixedly sleeved on the positioning rod 111, the distance between the O-ring 40 and the bottom end of the positioning rod 111 facing the valve cap 30 is greater than the depth of the valve cap 30.

[0050] After that, the push rod 112 sleeved on the positioning rod 111 is moved in the direction of the valve cap 30. That is to say, the push rod 112 is pushed downward to make the push rod 112 move relative to the positioning rod 111 in the direction of the valve cap 30. The inclined surface 1121 of the push rod 112 is used to push the O-ring 40 sleeved on the positioning rod 111 into the valve cap 30. As shown in Figure 8 and Figure 9 As shown, since the bottom end surface of the push rod 112 is the inclined surface 1121, after the push rod 112 pushes the O-ring 40 into the valve cap 30, the O-ring 40 is in an inclined posture in the valve cap 30.

[0051] Finally, the positioning rod 111 and the push rod 112 are removed from the valve cap 30 together. The operation of the first press-fitting assembly 110 is completed, and then the second press-fitting assembly 210 is used for press-fitting.

[0052] In specific implementation, to ensure the reliability of the assembly of the O-ring 40 and the valve cap 30, when the first press-fitting mechanism 100 inserts the positioning rod 111 into the valve cap 30, the axis direction of the positioning rod 111 coincides with the axis direction of the valve cap 30. Specifically, the axis coordinates of the valve cap 30 can be determined by the tooling position for positioning the valve cap 30, so as to control the relative position between the first press-fitting mechanism 100 and the valve cap 30 to ensure that the axes of the positioning rod 111 and the valve cap 30 coincide.

[0053] In specific implementation, the circumference of the inclined surface 1121 of the push rod 112, that is, the connecting part between the inclined surface 1121 and the rod body of the push rod 112, has a smooth transition to avoid sharp structures such as sharp corners when the inclined surface 1121 presses the O-ring 40 and cause damage to the O-ring 40.

[0054] In a specific implementation, the degree of inclination of the inclined surface 1121, that is, the angle between the inclined surface 1121 and the axial direction of the push rod 112 can be determined according to actual needs, and should not be too large or too small. If the angle between the inclined surface 1121 and the axial direction of the push rod 112 is too large, the angle between the O-ring 40 and the top wall 31 (roughly parallel to the horizontal plane) of the valve bonnet 30 after being pressed into the valve bonnet 30 is small, which is not conducive to reducing the resistance of the O-ring 40 to be pressed in. If the angle between the inclined surface 1121 and the axial direction of the push rod 112 is too small, the angle between the O-ring 40 and the top wall 31 (roughly parallel to the horizontal plane) of the valve bonnet 30 after being pressed into the valve bonnet 30 is large, which is not conducive to the subsequent flattening operation. Exemplarily, the angle between the inclined surface 1121 and the axial direction of the push rod 112 can be set to 30° to 60°, and preferably 45°.

[0055] In a specific implementation, the protruding end of the positioning rod 111 of the first press-fitting assembly 110 extending out of the push rod 112 includes a large diameter section 1111 and a small diameter section 1112, and the large diameter section 1111 and the small diameter section 1112 are arranged along the direction of pushing the O-ring 40, to show the orientation of the diagram, that is, the small diameter section 1112 is located below the large diameter section 1111, and when the positioning rod 111 is inserted into the valve bonnet 30 for positioning, the small diameter section 1112 of the positioning rod 111 abuts against the bonnet top wall 31 of the valve bonnet 30. Among them, the large diameter section 1111 can be interference-fitted with the O-ring 40, the radial dimension of the small diameter section 1112 is smaller than the inner diameter of the O-ring 40, and the push rod 112 can be sleeved on the large diameter section 1111.

[0056] After the positioning rod 111 is set as above, it is convenient to put on the O-ring 40. The O-ring 40 first passes through the small diameter section 1112 and then fits tightly with the large diameter section 1111. When the push rod 112 pushes the O-ring 40 into the valve cap 30 relative to the positioning rod 111, it is also convenient for the O-ring 40 to detach from the positioning rod 111, which can prevent the O-ring 40 from having undesirable phenomena such as flanging or wrinkling during this process.

[0057] In a specific implementation, the first press-fit assembly 110 further includes a first mounting frame 113 and a first driving component 114. The positioning rod 111 is fixedly connected to one side of the first mounting frame 113. The first driving component 114 is installed on the first mounting frame 113. The first driving component 114 is used to drive the push rod 112 to move relative to the positioning rod 111 along the axis direction of the positioning rod 111. Figures 4 to 9 In the shown position, the positioning rod 111 is fixedly connected to the lower part of the first mounting frame 113, and the push rod 112 which is sleeved on the positioning rod 111 is also located below the first mounting frame 113. The main body of the first driving component 114 is installed above the first mounting frame 113.

[0058] In the illustrated example, the first mounting frame 113 is specifically a plate-shaped structure. In other implementations, the structure of the first mounting frame 113 can be designed as required.

[0059] To simplify the structure and improve the reliability of the operation, the first driving component 114 may preferably be a driving member with telescopic motion (or linear motion), such as a cylinder, an electric cylinder, or a linear motor, etc.

[0060] To ensure the accuracy of the moving direction of the push rod 112 relative to the positioning rod 111, the telescopic portion of the first driving component 114 may be fixedly connected to the push rod 112 through a transition component 15, and a guiding structure 116 is provided between the transition component 15 and the first mounting bracket 113 to guide the movement of the push rod 112.

[0061] In a specific implementation, the guiding structure 116 includes a guiding rod 1161. The guiding rod 1161 is slidably inserted into the first mounting bracket 113. A linear bearing 1162 is provided between the guiding rod 1161 and the first mounting bracket 113. The guiding rod 1161 is fixedly connected to the transition component 115. In the illustrated orientation, the lower end of the guiding rod 1161 passes through the first mounting bracket 113 and is fixedly connected to the transition component 115.

[0062] In this way, the telescopic portion of the first driving component 114 can drive the transition component 15 to move up and down, thereby driving the push rod 112 fixedly connected to the transition component 15 to move up and down together. During this process, the guiding rod 1161 slides relative to the first mounting bracket 113 to guide the movement of the transition component 15.

[0063] To ensure the stability and reliability of the telescopic portion of the first driving component 114 and the reliability of the sliding of the guiding rod 1161, the first press-fitting assembly 110 further includes a connecting member 117. The connecting member 117 is located above the first mounting bracket 113. The telescopic portion of the first driving component 114 is connected to the connecting member 117, and the upper end of the guiding rod 116 is also fixedly connected to the connecting member 117.

[0064] In the illustrated example, the guiding structure 116 includes two guiding rods 1161. The two guiding rods 1161 are arranged on both sides of the first driving component 114, so that the structure of the first press-fitting assembly 110 is relatively balanced and the actions of related components are more stable and reliable. In other implementation manners, the guiding structure 116 may also include three or more guiding rods 1161, and the multiple guiding rods 116 may be symmetrically arranged around the first driving component 114.

[0065] The setting of the first driving component 114 and related structures enables the operation of the push rod 112 to push the O-ring 40 into the valve cap 30 to be automated, providing conditions for improving the assembly efficiency.

[0066] In a specific implementation, the first pressing mechanism 100 further includes a second driving component 120, and the second driving component 120 is used to drive the first pressing assembly 110 to move along the axial direction of the positioning rod 111, so as to insert the positioning rod 111 into the valve cap 30. In this way, when assembling the valve cap 30 and the O-ring 40, the positioning operation of inserting the positioning rod 111 into the valve cap 30 can also be automated.

[0067] In a specific implementation, the first pressing mechanism 100 further includes a first guiding component 150, and the first guiding component 150 is used to guide the movement of the first pressing assembly 110.

[0068] The second driving component 120 can be a driving part with telescopic motion (or linear motion), such as a cylinder, an electric cylinder or a linear motor, etc.

[0069] As Figure 4 and Figure 5 As shown, in actual setting, the first pressing mechanism 100 further includes a first mounting seat 140 for mounting the second driving component 120, and the telescopic part of the second driving component 120 is connected to the first pressing assembly 110 to drive the first pressing assembly 110 to move along the axial direction of the positioning rod 111.

[0070] Specifically, the telescopic part of the second driving component 120 can be connected to the first mounting bracket 113 of the first pressing assembly 110. In this way, it is convenient to drive the positioning rod 111 and the push rod 112 to move together. In actual application, according to the structural setting and connection requirements, the telescopic part of the second driving component 120 can be connected to the first mounting bracket 113 through a first adapter 130.

[0071] In a specific implementation, the first guiding component 150 includes a first slider 151 and a first slide rail 152. In the figure, the first slider 151 is arranged on the first adapter 130, and the first slide rail 152 is arranged on the first mounting seat 140. The first slider 151 and the first slide rail 152 are slidably matched in the axial direction of the positioning rod 111. In this way, the movement of the first pressing assembly 110 can be guided.

[0072] It can be understood that on the basis that the telescopic part of the second driving component 120 is directly connected to the first mounting bracket 113, the aforementioned first slider 151 can be arranged on the first mounting bracket 113.

[0073] In other implementation manners, the first slider 151 can also be arranged on the first mounting seat 140, and the first slide rail 152 can be arranged on the first adapter 130.

[0074] In addition to the structure of the slider and the slide rail, the first guiding component 150 can also be other guiding structures, such as a guiding structure formed by the cooperation of a lead screw and a nut, etc. No further examples will be given one by one.

[0075] As Figures 10 to 13 shown, the second press-fitting mechanism 200 includes a second press-fitting assembly 210. The second press-fitting assembly 210 includes a press-fitting rod 211. The press-fitting rod 211 can rotate and move along the axial direction of the valve cap 30 to extend into the valve cap 30. The diameter of the rod portion of the press-fitting rod 211 extending into the valve cap 30 is greater than the inner diameter of the O-ring 40.

[0076] To Figure 10 and Figure 11 the orientation shown, during assembly, the valve cap 30 is located below the second press-fitting assembly 210. The valve cap 30 with the O-ring 40 placed in an inclined posture is located below the second press-fitting assembly 210, and the valve cap 30 still has an upward-opening posture.

[0077] When operating with the second press-fitting assembly 210, the press-fitting rod 211 is rotated and extends into the valve cap 30 along the axial direction of the valve cap 30 in the rotating state. That is to say, the rotating press-fitting rod 211 is moved downward to extend into the valve cap 30. Since the diameter of the rod portion of the press-fitting rod 211 extending into the valve cap 30 is greater than the inner diameter of the O-ring 40, the press-fitting rod 211 can flatten the O-ring 40 in an inclined posture in the valve cap 30 during rotation and downward movement, and make the O-ring 40 tightly fit with the top wall portion 31 of the valve cap 30, as Figure 13 shown, to realize the assembly of the O-ring 40 and the valve cap 30, and finally the press-fitting rod 211 is removed from the valve cap 30.

[0078] In a specific implementation, the second press-fitting assembly 210 further includes a second mounting bracket 212 and a third driving component 213. The third driving component 213 is mounted on the second mounting bracket 212. The third driving component 213 is used to drive the press-fitting rod 211 to rotate around its own axis to provide conditions for assembly automation.

[0079] To avoid phenomena such as shaking of the press-fitting rod 211 during rotation, the second press-fitting assembly 210 can also be provided with a guiding member 214 to limit or guide the position of the press-fitting rod 211. Specifically, the press-fitting rod 211 rotatably passes through the guiding member 214, and the guiding member 214 can be fixedly connected to the second mounting bracket 212 to make the overall structure of the second press-fitting assembly 210 more stable.

[0080] In the illustrated example, both the second mounting bracket 212 and the guiding member 214 are in a plate-like structure, and the two are arranged in parallel and are connected and fixed by a fixing rod 216.

[0081] In a specific implementation, the third driving component 213 may include a driving source with a rotational driving function, such as a motor. The third driving component 213 further includes a speed reduction transmission mechanism. The driving source is in transmission connection with the press-fitting rod 211 through the speed reduction transmission mechanism to drive the press-fitting rod 211 to rotate at a lower speed, so as to avoid damaging the O-ring 40 when the press-fitting rod 211 rotates at too high a speed during the press-fitting of the O-ring 40.

[0082] To simplify the structure and reduce the space occupied by the tooling, the third driving component 213 can be selected as a reduction motor integrated with a reducer.

[0083] Specifically, the output shaft of the reduction motor can be in transmission connection with the press-fitting rod 211 through a coupling 215.

[0084] In the illustrated example, the lower end of the press-fitting rod 211, that is, the rod portion for extending into the valve cap 30, is a circular rod portion 2111. The upper end of the press-fitting rod 211 is a main body rod portion integrally formed with the circular rod portion 2111. The radial dimension of the main body rod portion is larger than that of the circular rod portion 2111. Such a structural setting is beneficial to improving the rotational stability of the press-fitting rod 211 and can reduce the probability of radial shaking of the press-fitting rod 211 during rotation.

[0085] The diameter of the circular rod portion 2111 is adapted to the inner diameter of the valve cap 30 and is set as large as possible on the basis of being able to insert into the valve cap 30 and rotate relative to the valve cap 30, so as to increase the contact area for press-fitting the O-ring 40, improve the effect of press-fitting the O-ring 40, and also reduce the damage to the O-ring 40.

[0086] In a specific implementation, the second press-fitting mechanism 200 further includes a fourth driving component 220. The fourth driving component 220 is used to drive the second press-fitting assembly 210 to move along the axial direction of the press-fitting rod 211, so as to extend the rotating press-fitting rod 211 into the valve cap 30, thereby performing an operation of flatly pressing the O-ring 40 in the valve cap 30.

[0087] In a specific implementation, the rotating press-fitting rod 211 extends into the valve cap 30 in a uniform speed state. That is to say, the fourth driving component 220 controls the rotating press-fitting rod 211 to extend into the valve cap 30 at a relatively uniform speed, so as to provide a relatively stable and uniform downward pressure for the inclined O-ring 40 to avoid causing bad phenomena such as wrinkles on the O-ring 40.

[0088] The speed at which the rotating press-fitting rod 211 extends into the valve cap 30 should not be too fast either. It can be actually set according to needs, taking the press-fitting effect on the O-ring 40 as the criterion.

[0089] The fourth driving component 220 also has a driving member with a telescopic motion (or linear motion), such as a cylinder, an electric cylinder or a linear motor, etc.

[0090] Such asFigure 10 and Figure 11 As shown in Figure 11 , during actual installation, the second press-fitting mechanism 200 further includes a second mounting seat 240 for mounting a fourth driving component 220. The telescopic part of the fourth driving component 220 is connected to the second press-fitting assembly 210 to drive the second press-fitting assembly 210 to move along the axial direction of the press-fitting rod 211.

[0091] Specifically, the telescopic part of the fourth driving component 220 can be connected to the guide 214 of the second press-fitting assembly 210 or to the second mounting bracket 212 of the second press-fitting assembly 210. In actual applications, according to the structural settings and connection requirements, the telescopic part of the fourth driving component 220 can be connected to the guide 214 or the second mounting bracket 212 through a second adapter 230. In the figure, an example is shown where the telescopic part of the fourth driving component 220 is connected to the guide 214 through a second adapter 230.

[0092] In specific implementation, the second press-fitting mechanism 200 further includes a second guiding assembly 250 for guiding the movement of the second press-fitting assembly 210.

[0093] Specifically, the second guiding assembly 250 includes a second slider 251 and a second slide rail 252. In the figure, the second slider 251 is arranged on the second adapter 230, and the second slide rail 252 is arranged on the second mounting seat 240. The second slider 251 and the second slide rail 252 are in sliding fit in the axial direction of the press-fitting rod 211. In this way, the movement of the second press-fitting assembly 210 can be guided.

[0094] It can be understood that on the basis of the direct connection between the telescopic part of the fourth driving component 220 and the guide 214 or the second mounting bracket 212, the aforementioned second slider 251 can be arranged on the guide 21 or the second mounting bracket 212.

[0095] In other implementation manners, the second slider 251 can also be arranged on the second mounting seat 240, and the second slide rail 252 can be arranged on the second adapter 230.

[0096] In addition to the structure of the slider and the slide rail, the second guiding assembly 250 can also be other guiding structures, such as a guiding structure formed by the cooperation of a lead screw and a nut, etc. No further examples will be given one by one.

[0097] In specific implementation, to ensure the reliability and safety of the press-fitting of the O-ring 40, when the pressing rod 211 is inserted into the valve cap 30, the axis of the pressing rod 211 coincides with the axis of the valve cap 30. Specifically, the axis coordinates of the valve cap 30 can be determined through the tooling position for positioning the valve cap 30, so as to control the relative position between the second press-fitting mechanism 200 and the valve cap 30 to ensure that the axes of the pressing rod 211 and the valve cap 30 coincide.

[0098] In this article, specific examples are used to illustrate the principles and implementation modes of the present application. The description of the above embodiments is only used to help understand the method and its core idea of the present application. It should be noted that for those of ordinary skill in the art, 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 protection scope of the claims of the present application.

Claims

1. A method for assembling an O-ring and a valve cap, characterized in that, The assembly method includes the steps: S1. Press the O-ring into the valve cap in an inclined posture; S2. Insert the rotating pressing rod into the valve cap along the axis direction of the valve cap to press the O-ring in the inclined posture flat and clamp it on the top wall of the valve cap.

2. The assembly method according to claim 1, wherein The step S1 includes: Fix the O-ring on the positioning rod, insert the positioning rod with the O-ring fixed thereon into the valve cap and abut against the top wall, in this state, the O-ring is located outside the valve cap; A push rod is sleeved outside the positioning rod, the end face of the push rod close to the O-ring is an inclined face, push the push rod towards the valve cap, so that the inclined face of the push rod pushes the O-ring fixed on the positioning rod into the valve cap.

3. The assembly method according to claim 2, characterized in that, In the step S1, when the positioning rod is inserted into the valve cap, the axis of the positioning rod coincides with the axis of the valve cap.

4. The assembly method according to claim 2, wherein The positioning rod includes a large-diameter section and a small-diameter section, the large-diameter section is in interference fit with the O-ring, the radial dimension of the small-diameter section is smaller than the inner diameter of the O-ring, and the small-diameter section can abut against the top wall of the valve cap.

5. The assembly method according to claim 2, wherein After the push rod pushes the O-ring into the valve cap, remove the positioning rod and the push rod from the valve cap.

6. The assembly method according to claim 2, characterized in that, The included angle between the inclined face of the push rod and the axis direction of the push rod is 30° to 60°.

7. The assembly method according to any one of claims 1-6, characterized in that, In the step S2, the pressing rod rotates around its own axis, and the pressing rod extends into the valve cap at a uniform speed.

8. The assembly method according to any one of claims 1-6, characterized in that, In the step S2, the pressing rod is driven to rotate by a reduction motor.

9. The assembly method according to any one of claims 1-6, characterized in that, In the step S2, when the pressing rod extends into the valve cap, the axis of the pressing rod coincides with the axis of the valve cap.

10. The assembly method according to any one of claims 1-6, characterized in that, In the step S2, the rod part of the pressing rod extending into the valve cap is a circular rod part, and the diameter of the circular rod part is smaller than the inner diameter of the valve cap and larger than the inner diameter of the O-ring.

Images