Spacing keeping jig

Abstract

The utility model provides a spacing keeping jig which is used for assembling a shell and an element, the shell is provided with a shell mounting surface, the element is provided with an element mounting surface, the spacing keeping jig comprises a main body part, a first clamping part and a second clamping part, the main body part comprises a first end surface and a second end surface, the first end surface and the second end surface are arranged in parallel, and the second end surface is higher than the first end surface; the first positioning part is arranged on the main body part, the shell mounting surface abuts against the first end surface, the shell is positioned by the first positioning part, the second positioning part is arranged on the main body part, the component mounting surface abuts against the second end surface, and the component is positioned by the second positioning part. According to the interval keeping jig provided by the embodiment of the invention, the interval between the electrode and the diaphragm can be stable after the electrode and the shell are installed, readjustment is not needed, and the assembly efficiency is greatly improved.

Description

Technical Field

[0001] The present application belongs to the field of assembly manufacturing, and more specifically, relates to a spacing maintaining fixture. Background Art

[0002] In the production of capacitive differential pressure sensors, an electrode needs to be fixed to the inner wall of the shell with glue, and then the diaphragm is clamped and fixed between two shells (both of which have electrodes fixed), so that there are electrodes on both sides of the diaphragm to form two capacitors. The initial capacitance of these two capacitors should be consistent to ensure the detection effect of the capacitive differential pressure sensor, which requires that the spacing between the two electrodes and the diaphragm be controlled to be equal during the assembly process.

[0003] In the related art, when gluing electrodes and shells, it is impossible to control the thickness of the glue between the electrodes and the shell, and thus it is impossible to control the distance between the electrodes and the diaphragm after assembly. The electrodes or the shell also need to be adjusted, resulting in low assembly efficiency. Utility Model Content

[0004] The embodiment of the present application provides a spacing maintaining fixture, which can stabilize the spacing between the electrode and the diaphragm after the electrode and the shell are installed, without the need for further adjustment, thereby greatly improving assembly efficiency.

[0005] The technical solution adopted in the embodiment of the present application is: to provide a spacing maintaining jig for assembling a housing and a component, wherein the housing has a housing mounting surface, and the component has a component mounting surface, and the spacing maintaining jig comprises:

[0006] A main body, comprising a first end surface and a second end surface, wherein the first end surface is arranged parallel to the second end surface, and the second end surface is higher than the first end surface;

[0007] a first positioning portion, which is disposed on the main body, the housing mounting surface abuts against the first end surface, and the housing is positioned by the first positioning portion; and

[0008] The second positioning portion is arranged on the main body, the component mounting surface abuts against the second end surface, and the component is positioned by the second positioning portion.

[0009] Furthermore, the spacing maintaining fixture also includes a protruding structure arranged around the second end surface, the inner side wall of the protruding structure is the first positioning portion, and the outer side wall of the protruding structure is the second positioning portion.

[0010] Furthermore, the protruding structure is a continuous annular structure.

[0011] Furthermore, the protruding structure is in the shape of a hollow cylinder.

[0012] Furthermore, the main body also includes a first through hole provided on the second end surface.

[0013] Furthermore, an inclined guide surface is provided at one end of the second positioning portion away from the second end surface.

[0014] Furthermore, a circle of assembly grooves or assembly convex rings is provided on the housing mounting surface;

[0015] The main body also includes a receiving groove and an exhaust groove. The receiving groove is arranged on the first end surface and is opposite to the assembly groove or the assembly convex ring. One end of the exhaust groove is connected to the receiving groove, and the other end is connected to the atmosphere.

[0016] Furthermore, the housing further comprises an assembly through hole provided on the mounting surface of the housing;

[0017] The first end surface is provided with a second through hole corresponding to the assembly through hole.

[0018] Furthermore, the second end surface is circular, and the first end surface is annular and surrounds the outer side of the second end surface.

[0019] Furthermore, the spacing maintaining fixture also includes an annular protrusion structure, the second end face is located on the inner side of the annular protrusion structure, the first end face is located on the outer side of the annular protrusion structure, the inner side wall of the annular protrusion structure is the first positioning portion, and the outer side wall of the annular protrusion structure is the second positioning portion.

[0020] The beneficial effect of the spacing retaining fixture provided by the embodiment of the present application is that: the spacing retaining fixture of the embodiment of the present application is provided with a first end face and a second end face, the first end face and the second end face are arranged in parallel, and the second end face is higher than the first end face. During assembly, the element (such as an electrode) is positioned with the second positioning portion so that the element mounting surface of the element abuts against the second end face, and a certain thickness (the thickness is greater than the height difference between the second end face and the first end face) of the adhesive layer can be coated on the end of the element opposite to the element mounting surface. Then the shell is positioned with the first positioning portion, at this time, pressure can be applied to the shell or the shell can be pressed down by the gravity of the shell itself, so that the shell mounting surface of the shell abuts against the first end face, and the shell will press the adhesive layer thinner during the pressing process, so that the shell and the element are bonded together. After fixing, the distance between the shell mounting surface and the element mounting surface of the shell and the element is equal to the height difference between the first end face and the second end face. When the shell is subsequently assembled and abutted with other parts (such as a diaphragm), due to the stable distance between the shell and the element, the distance between the element and other parts can also be kept stable, and no adjustment is required, which greatly improves the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the three-dimensional structure of the spacing maintaining fixture provided in an embodiment of the present application;

[0023] Figure 2 A cross-sectional schematic diagram of a spacing maintaining fixture provided in an embodiment of the present application;

[0024] Figure 3 for Figure 2 Magnified view at A in the middle;

[0025] Figure 4 A schematic diagram of a three-dimensional structure in which a housing and components provided in an embodiment of the present application are assembled using a spacing retaining jig;

[0026] Figure 5 An exploded view of a housing and an element provided in an embodiment of the present application assembled using a spacing retaining jig;

[0027] Figure 6 A cross-sectional schematic diagram of a housing and a component provided in an embodiment of the present application being assembled using a spacing maintaining jig;

[0028] Figure 7 for Figure 6 Magnified view at B.

[0029] Among them, the reference numerals in the figure are:

[0030] 10. Spacing holding fixture; 11. Main body; 111. First end surface; 112. Second end surface; 113. Protruding structure; 114. First through hole; 115. Accommodating groove; 116. Exhaust groove; 117. Second through hole; 12. First positioning portion; 13. Second positioning portion; 131. Guide surface;

[0031] 20. housing; 21. housing mounting surface; 22. assembly groove; 23. assembly through hole;

[0032] 30. component; 31. component mounting surface;

[0033] 40. Adhesive layer. DETAILED DESCRIPTION

[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0035] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0036] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] See also Figure 1 and Figure 2 Now, the spacing maintaining jig 10 provided in the embodiment of the present application is described. The spacing maintaining jig 10 provided in the embodiment of the present application is used to assemble the housing 20 and the component 30.

[0039] Reference Figure 5 The housing 20 has a housing mounting surface 21, and the element 30 has an element mounting surface 31. The element 30 needs to be assembled and fixed in the housing 20, and a fixed distance is provided between the element mounting surface 31 and the element mounting surface 31, so that when the housing 20 is assembled with another component, a fixed distance is provided between the component mounting surface 31 and the component. In some embodiments, the element 30 is an electrode, and the other component is a diaphragm. After the electrode, the housing 20, and the diaphragm are assembled, the distance between the element mounting surface 31 of the electrode and the diaphragm needs to be controlled.

[0040] Reference Figure 1 and Figure 2 The spacing maintaining fixture 10 includes a main body 11 , a first positioning portion 12 and a second positioning portion 13 .

[0041] Reference Figure 3 The main body 11 includes a first end face 111 and a second end face 112, the first end face 111 and the second end face 112 are arranged in parallel, and the second end face 112 is higher than the first end face 111. The main body 11 can be generally block-shaped, having a flat first end face 111, and a slightly raised platform is arranged on the first end face 111, the end face of the platform is the second end face 112, the second end face 112 and the first end face 111 are parallel to each other, and the height difference between the second end face 112 and the first end face 111 is h, so that the housing mounting surface 21 and the component mounting surface 31 are parallel after assembly, ensuring that the spacing between the housing mounting surface 21 and the component mounting surface 31 is equal.

[0042] Reference Figure 1 and Figure 2 The first positioning portion 12 is provided on the main body 11, the housing mounting surface 21 abuts against the first end surface 111, and the housing is positioned by the first positioning portion 12. The housing 20 can be positioned on the first end surface 111 by the first positioning portion 12, and the housing mounting surface 21 abuts against the first end surface 111. It can be understood that the first positioning portion 12 can match the shape of the housing 20, the housing 20 has an inner wall and an outer wall, and the first positioning portion 12 can match the contour shape of the outer wall of the housing 20 for positioning, or can also match the contour shape of the inner wall of the housing 20 for positioning.

[0043] Reference Figure 1 , Figure 2 and Figure 6 The second positioning portion 13 is provided on the main body 11, the component mounting surface 31 abuts against the second end surface 112, and the component is positioned by the second positioning portion 12. The component 30 can be positioned on the first end surface 111 by the second positioning portion 13, and the component mounting surface 31 abuts against the second end surface 112. It can be understood that the second positioning portion 13 can match the shape of the component 30, the component 30 has an outer surface, and the second positioning portion 13 can match the contour shape of the outer surface of the component 30 for positioning.

[0044] It can be understood that the first positioning portion 12 and the second positioning portion 13 can be a raised or recessed structure to match the shape of the shell 20 and the element 30. Taking the shell 20 as an example, a groove matching the shape of the shell 20 can be formed on the spacing holding fixture 10, and the side wall of the groove (i.e., the first positioning portion 12) can position the shell 20 to prevent the shell 20 from being displaced. Similarly, a circle of continuous or discontinuous protrusions can be formed on the spacing holding fixture 10, and the shape of the area surrounded by the protrusions matches the shape of the shell 20, then the side wall of the protrusion (i.e., the first positioning portion 12) can position the shell 20 to prevent the shell 20 from being displaced. The setting of the second positioning portion 13 corresponding to the element 30 can also refer to the setting of the first positioning portion 12, using a groove or a protrusion, and using the inner wall of the groove or the protrusion as a structure for limiting the position of the element 30, which will not be repeated here.

[0045] Reference Figure 1 , Figure 2 and Figure 6 Based on the above structure, when assembling the shell 20 and the component 30, the component 30 can be first positioned in cooperation with the second positioning portion 13 so that the component mounting surface 31 abuts against the second end surface 112; then, a certain thickness of adhesive layer 40 is applied to the end of the component 30 away from the component mounting surface 31, and the thickness of the adhesive layer 40 is greater than the height difference between the second end surface 112 and the first end surface 111; then the shell 20 is positioned in cooperation with the first positioning portion 12, and at this time, pressure can be applied to the shell 20 or the shell 20 can be pressed down by its own gravity so that the shell mounting surface 21 of the shell 20 abuts against the first end surface 111, and the shell 20 will press the adhesive layer 40 thinner during the pressing process, so that the shell 20 and the component 30 are bonded together. After fixing, the distance between the shell mounting surface 21 and the component mounting surface 31 of the shell 20 and the component 30 is equal to the height difference between the first end face 111 and the second end face 112. When the shell 20 is subsequently assembled and abutted with other parts (such as a diaphragm), since the distance between the shell 20 and the component 30 is stable, the distance between the component 30 and other parts can also be kept stable, and no adjustment is required, which greatly improves the assembly efficiency. The shell 20 and the component 30 are assembled by the spacing retaining fixture 10 of the embodiment of the present application. After each assembly of the shell 20 and the component 30, the distance between the shell mounting surface 21 and the component mounting surface 31 is equal (that is, the height difference between the second end face 112 and the first end face 111), and the performance of the produced product is more stable.

[0046] Reference Figure 1 , Figure 2 and Figure 6, the spacing maintaining jig 10 also includes a protruding structure 113 arranged around the second end face 112, the inner side wall of the protruding structure 113 is the first positioning portion 12, and the outer side wall of the protruding structure 113 is the second positioning portion 13. That is, in the embodiment of the present application, the housing 20 and the element 30 are positioned at the same time by providing a protruding structure on the main body 11. The first positioning portion 12 and the second positioning portion 13 are respectively the outer side wall and the inner side wall of the protruding structure 113, the inner side wall of the housing 20 abuts against the outer side wall of the protruding structure 113 to cooperate in positioning, and the outer side wall of the element 30 abuts against the inner side wall of the protruding structure 113 to cooperate in positioning. It can be understood that there is a gap between the housing 20 and the element 30 after positioning, and the protruding structure 113 is just inserted into the gap.

[0047] Reference Figure 1 The protruding structure 113 may be a ring structure that continuously surrounds the second end face 112, or may be a ring structure that discontinuously surrounds the second end face 112. For example, the protruding structure 113 includes a plurality of protrusions that are sequentially arranged in a ring to surround the second end face 112. It is understandable that the second end face 112 may be circular.

[0048] In some embodiments, the protruding structure 113 is a continuous annular structure, and its cross-sectional shape may be semicircular, rectangular, triangular, trapezoidal, etc., as long as the element 30 and the housing 20 can be positioned from the inside and the outside respectively.

[0049] Reference Figure 1 , the protruding structure 113 is in the shape of a hollow cylinder. In some embodiments of the present application, the element 30 is an electrode, which is in the shape of a cylinder, and the shell 20 is also in the shape of a cylinder. A cylindrical cavity is formed inside the shell 20, and the element 30 needs to be installed in the cavity, and the inner diameter of the cavity is greater than the outer diameter of the element 30. The inner diameter of the protruding structure 113 is adapted to the outer diameter of the element 30, and the element 30 can be sleeved in the cylindrical hollow of the protruding structure 113, so that the element mounting surface 31 of the element 30 abuts the second end face 112. The outer diameter of the protruding structure 113 is adapted to the inner diameter of the cavity, and the shell 20 can be sleeved outside the protruding structure 113, so that the element 30 and the shell 20 are both positioned on the main body 11, and then by pressing the shell 20 downward, the shell mounting surface 21 of the shell 20 abuts the first end face 111, and the glue layer between the shell 20 and the element 30 is thinned, so that the shell 20 and the element 30 are bonded.

[0050] Reference Figure 3, the second positioning portion 13 is also provided with an inclined guide surface 131 at one end away from the second end surface 112, and the guide surface 131 can assist in matching and positioning the element 30 with the protruding structure 113. Due to the high installation accuracy requirement, the inner diameter of the inner side surface of the protruding structure 113 is very close to the outer diameter of the element 30. If the element 30 is installed in the protruding structure 113, it is easy to install when the axis of the element 30 and the axis of the protruding structure 113 are manually adjusted to coincide, which is troublesome. Therefore, the embodiment of the present application is provided with a guide surface 131 at the upper end of the second positioning portion 13. With the help of the guide surface 131, the element 30 can be more smoothly introduced into the protruding structure 113. Specifically, the guide surface 131 is in the shape of a cone or an arc.

[0051] Reference Figure 3 , the main body 11 also includes a first through hole 114 provided on the second end face 112. Since the protruding structure 113 is a continuous annular structure, and the inner side wall of the protruding structure 113 matches and fits with the outer peripheral surface of the element 30 for positioning, the installation accuracy is high. When the element 30 is installed in the protruding structure 113, the air between the element 30 and the protruding structure 113, the element installation surface 31 and the second end face 112 is difficult to be discharged, which is not conducive to the installation of the element 30. For this reason, the embodiment of the present application is provided with a first through hole 114 on the second end face 112, so that when the element 30 and the protruding structure 113 are matched and positioned for installation, the air between the element installation surface 31 and the second end face 112 can be discharged from the first through hole 114, so as to avoid air accumulation and compression and delay of the installation and positioning of the element 30. In addition, after the shell 20 and the component 30 are assembled and fixed, if the component 30 and the protruding structure 113 are stuck due to excessive assembly accuracy and a small size difference, a push rod can be inserted from the lower end of the first through hole 114 to push the component 30 and the shell 20 upward out of the protruding structure 113.

[0052] Reference Figure 5 and Figure 6, a circle of assembly grooves 22 or assembly convex rings are provided on the shell mounting surface 21, and the assembly grooves 22 or assembly convex rings are used when assembling with other parts. For example, the element 30 is an electrode, and the shell 20 is to be assembled with the diaphragm, and finally the distance between the diaphragm and the electrode is to be kept stable in the produced product. Therefore, it is necessary to install and press the diaphragm on the shell mounting surface 21. Specifically, the diaphragm can be clamped between the two shell mounting surfaces 21 by using a shell 20 and another shell 20. The shell mounting surface 21 of one shell 20 can be provided with an assembly groove 22, and the shell mounting surface 21 of the other shell 20 can be provided with an assembly convex ring. During assembly, the two shell mounting surfaces 21 clamp the diaphragm, and the assembly convex ring presses the diaphragm and embeds it into the assembly groove 22, thereby pressing and fixing the diaphragm on the shell mounting surface 21. It is also possible to set grooves on the shell mounting surfaces 21 of the two shells 20, and use an independent pressure ring. During assembly, the diaphragm and the pressure ring are clamped together between the shell mounting surfaces 21 of the two shells 20, and the pressure ring is on one side of the diaphragm and embedded in the assembly groove 22. At the same time, the pressure ring presses the diaphragm and is embedded in another assembly groove 22.

[0053] Reference Figure 1 and Figure 2 The main body 11 further includes a receiving groove 115 and an exhaust groove 116. The receiving groove 115 is provided on the first end surface 111 and is opposite to the assembly groove 22 or the assembly convex ring. One end of the exhaust groove 116 is connected to the receiving groove 115, and the other end is connected to the atmosphere. In some embodiments, the shell mounting surface 21 of the shell 20 is provided with an assembly convex ring. These assembly convex rings protrude on the shell mounting surface 21 and hinder the abutment between the shell mounting surface 21 and the first end surface 111. Therefore, the receiving groove 115 is provided on the first end surface 111 to accommodate the assembly convex ring so that the shell mounting surface 21 and the first end surface 111 can abut. The receiving groove 115 is connected to the exhaust groove 116. When the assembly convex ring is embedded in the receiving groove 115, air can be discharged from the exhaust groove 116. The other end of the exhaust groove 116 can extend to the coverage area of ​​the shell 20, thereby communicating with the outside atmosphere and exhausting the air to the outside atmosphere.

[0054] Reference Figure 5The shell 20 also includes an assembly through hole 23 provided on the shell mounting surface 21, and a second through hole 117 corresponding to the assembly through hole 23 is provided on the first end face 111. When assembling, the shell 20 needs to be connected and fixed with another component (such as another shell 20) through a connector, so an assembly through hole 23 is provided for the connector to pass through. In order to press the shell 20 against the component 30 when bonding the shell 20 and the component 30, a connector can also be used to connect and fix the shell 20 and the spacing holding fixture 10, so that a second through hole 117 corresponding to the assembly through hole 23 is provided on the first end face 111. After the connector passes through the assembly through hole 23 and the second through hole 117, the shell 20 is fixed to the spacing holding fixture 10, so that the shell 20 presses the component 30 on the second end face 112, so that the thickness of the adhesive layer 40 between the shell 20 and the component 30 is stable and waits for it to be fixed.

[0055] Specifically, in some embodiments, the second end face 112 is circular, and the first end face 111 is annular and surrounds the outer side of the second end face 112. Correspondingly, the housing 20 is generally cylindrical, and a cylindrical inner cavity is provided at its lower end. The element 30 is an electrode, which is cylindrical and can be assembled in the inner cavity, and there is a gap between the side surface of the element 30 and the inside of the inner cavity. The element 30 abuts on the circular second end face 112, and the housing 20 abuts on the annular first end face 111. It can be understood that the element mounting surface 31 of the element 30 is also circular and matches and overlaps with the second end face 112, and the housing 20 mounting surface of the housing 20 is also annular and matches and overlaps with the first end face 111.

[0056] The spacing retaining fixture also includes an annular protrusion structure, the second end face 112 is located on the inner side of the annular protrusion structure, the first end face 111 is located on the outer side of the annular protrusion structure, the inner side wall of the annular protrusion structure is the first positioning portion, and the outer side wall of the annular protrusion structure is the second positioning portion. The annular protrusion structure is the aforementioned protrusion structure, which is arranged in an annular shape between the first end face 111 and the second end face 112, and the housing 20 and the element 30 can be positioned by the annular protrusion structure.

[0057] Correspondingly, the receiving groove 115 is also circular and is disposed on the first end surface 111 .

[0058] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A spacing retaining jig for assembling a housing and a component, wherein the housing has a housing mounting surface and the component has a component mounting surface, characterized in that: The spacing maintaining jig comprises: A main body, comprising a first end surface and a second end surface, wherein the first end surface is arranged parallel to the second end surface, and the second end surface is higher than the first end surface; a first positioning portion, which is disposed on the main body, the housing mounting surface abuts against the first end surface, and the housing is positioned by the first positioning portion; and The second positioning portion is arranged on the main body, the component mounting surface abuts against the second end surface, and the component is positioned by the second positioning portion.

2. The spacing maintaining jig according to claim 1, characterized in that: The spacing maintaining fixture further includes a protruding structure arranged around the second end surface, the inner side wall of the protruding structure is the first positioning portion, and the outer side wall of the protruding structure is the second positioning portion.

3. The spacing maintaining jig according to claim 2, characterized in that: The protruding structure is a continuous annular structure.

4. The spacing maintaining jig according to claim 3, characterized in that: The protruding structure is in the shape of a hollow cylinder.

5. The spacing maintaining jig according to claim 1, characterized in that: The main body also includes a first through hole provided on the second end surface.

6. The spacing maintaining jig according to claim 1, characterized in that: An inclined guide surface is further provided at one end of the second positioning portion away from the second end surface.

7. The spacing maintaining jig according to claim 1, characterized in that: The housing mounting surface is provided with a circle of mounting grooves or mounting convex rings; The main body also includes a receiving groove and an exhaust groove. The receiving groove is arranged on the first end surface and is opposite to the assembly groove or the assembly convex ring. One end of the exhaust groove is connected to the receiving groove, and the other end is connected to the atmosphere.

8. The spacing maintaining jig according to claim 1, characterized in that: The housing further comprises an assembly through hole provided on the mounting surface of the housing; The first end surface is provided with a second through hole corresponding to the assembly through hole.

9. The spacing maintaining jig according to claim 1, characterized in that: The second end surface is circular, and the first end surface is annular and surrounds the outer side of the second end surface.

10. The spacing maintaining jig according to claim 9, characterized in that: The spacing maintaining fixture also includes an annular protrusion structure, the second end face is located on the inner side of the annular protrusion structure, the first end face is located on the outer side of the annular protrusion structure, the inner side wall of the annular protrusion structure is the first positioning portion, and the outer side wall of the annular protrusion structure is the second positioning portion.

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