Ultrasonic water meter upper cover connecting structure and mounting method

Abstract

The invention relates to an ultrasonic water meter upper cover connecting structure and a mounting method, and belongs to the technical field of ultrasonic flow measurement. According to the technical scheme, the upper shell comprises an upper cover, a connecting shaft and an upper shell body; the upper cover and the upper shell body are respectively matched with the connecting shaft, the upper cover, the upper shell body and the connecting shaft are mutually matched to form a whole, and due to the effect of the connecting shaft, the upper cover can rotate in the horizontal dimension and the vertical dimension. The ultrasonic water meter upper cover connecting structure has the advantages that the upper cover can rotate in the vertical direction of the fixing shaft and rotate in the horizontal direction of the axis of the connecting shaft, and reading, communication and other operations can be conducted in a small space range; the slide way is adopted for locking, installation is convenient, and the locking structure is not prone to damage; the mode that the buckle boss is matched with the annular clamping groove is adopted, due to the lever principle, locking is firmer, and the probability that the upper cover falls off is reduced.

Description

Technical Field

[0001] The invention relates to an ultrasonic water meter upper cover connection structure and an installation method, in particular to an ultrasonic water meter upper cover connection structure for realizing small space operation, belonging to the technical field of ultrasonic flow measurement. Background Art

[0002] The upper cover is an important component of the ultrasonic water meter for protecting the display screen. Most of the upper covers of ultrasonic water meters in the prior art are fixedly installed and opened in a single direction around a fixed axis for reading and other operations. The problems are: the angle cannot be adjusted according to actual needs, and the requirements of opening the upper cover in a small space to read or communicate with the water meter cannot be met. In addition, the locking device of most water meter upper covers adopts an interference fit, and the connection method is relatively simple, and the probability of the upper cover falling off is relatively high. In the face of this problem, the usual practice of the prior art is: 1. The upper cover of the water meter is transparent or designed with a reading window for easy reading. 2. The locking device increases the interference amount to reduce the probability of the upper cover falling off. The above method has problems: for some water meters that cannot communicate, the installation difficulty increases, and the risk of damaging the locking device increases. Summary of the invention

[0003] The purpose of the present invention is to provide an ultrasonic water meter upper cover connection structure and method, which adds a rotatable connection device, changes the locking device structure, is easy to assemble, has a reliable structure, and solves the problems existing in the background technology.

[0004] The technical solution of the present invention is: An ultrasonic water meter upper cover connection structure comprises an upper cover, a connecting shaft and an upper shell; the upper cover and the upper shell are respectively matched with the connecting shaft, and the three are matched with each other to form a whole, and due to the action of the connecting shaft, the upper cover can rotate in two dimensions, horizontally and vertically; The surface of the upper shell body is provided with a shell reserved hole, and the shell reserved hole is provided with an annular groove; the upper cover is provided with a notch, and fixed shafts are symmetrically provided on the two inner side walls of the notch; the lower part of the connecting shaft is a circular positioning boss, and the upper part of the positioning boss is a protrusion, and the structures on both sides of the protrusion are symmetrical and the same, and locking grooves are provided, and the opening of the locking groove is a slideway, and the slideway and the locking groove are connected as a whole, and the slideway includes an upper edge and a lower edge of the slideway arranged parallel to each other, and the upper edge and the lower edge of the slideway are parallel to the upper surface of the upper shell body, and the axis of the locking groove is inclined to the upper edge, the lower edge and the upper surface of the upper shell body; the fixed shafts on the two inner side walls of the notch of the upper cover slide from the slideway to the locking grooves on both sides of the protrusion, and the fixed shaft cooperates with the locking groove, The upper cover can be opened and closed vertically; an annular snap-on boss is provided at the lower part of the positioning boss, the outer diameter of the positioning boss matches the inner diameter of the reserved hole of the shell, the outer diameter of the snap-on boss matches the inner diameter of the annular snap groove in the reserved hole of the shell, and the outer diameter of the snap-on boss is larger than the inner diameter of the reserved hole of the shell; a plurality of longitudinally arranged force-releasing grooves are provided on the circumference of the positioning boss and the snap-on boss, and the force-releasing groove opens at the bottom of the positioning boss; external force presses the force-releasing groove, the snap-on boss is deformed, and the outer diameter becomes smaller, the positioning boss and the snap-on boss are inserted into the reserved hole of the shell, and after the snap-on boss enters the annular snap groove in the reserved hole of the shell, the force-releasing groove resumes its deformation, the positioning boss rotates horizontally in the reserved hole of the shell and will not fall out, and the upper cover rotates horizontally with the positioning boss.

[0005] Furthermore, the lower edge of the slide enters the reserved hole of the shell along with the positioning boss, and the upper edge of the slide does not enter the reserved hole of the shell; the distance between the upper shell and the upper edge of the slide is smaller than the diameter of the fixed shaft, and the fixed shaft cannot slide out of the slide from the locking groove, thereby achieving locking.

[0006] Furthermore, the locking groove is arranged obliquely upwardly of the slide. After the fixed shaft slides into the locking groove from the slide, the sliding direction of the fixed shaft changes due to the upward inclined arrangement of the locking groove. The fixed shaft slides to the end position of the locking groove, which is higher than the lower edge of the slide and does not affect the rotation.

[0007] Furthermore, a plurality of vertically arranged ridges are provided on the circumference of the positioning boss to increase the interference fit between the positioning boss and the reserved hole of the shell.

[0008] Furthermore, the convex ridges are located on the circumference of the positioning boss above the buckle boss.

[0009] Furthermore, there are four force-releasing grooves, which are evenly distributed on the circumference of the positioning boss, dividing the bottom of the positioning boss into four arc parts.

[0010] Furthermore, the number of the convex ridges is four, which are evenly distributed on the circumference of the positioning boss; the convex ridges and the force-releasing grooves are arranged at intervals on the circumference of the positioning boss.

[0011] Furthermore, the positioning boss, protrusion, locking groove, slide, snap boss, force unloading groove and convex ridge are integrally injection molded; the upper shell body, shell reserved hole and annular slot are integrally injection molded; the upper cover, notch and fixed shaft are integrally injection molded.

[0012] An assembly method of the ultrasonic water meter upper cover connection structure comprises the following steps: ① The upper cover and the connecting shaft are assembled together to form component 1; the fixed shafts on the two inner walls of the notch of the upper cover are respectively slid from the slideway to the locking grooves on both sides of the protrusion of the connecting shaft. The fixed shafts cooperate with the locking grooves, and the upper cover can be opened and closed vertically; ② Install component 1 on the upper shell; use external force to compress the positioning boss and the force unloading groove at the bottom of the connecting shaft, the snap boss is deformed, the outer diameter becomes smaller, the positioning boss and the snap boss are inserted into the reserved hole of the shell, after the positioning boss enters the reserved hole of the shell, the snap boss cooperates with the annular groove, the force unloading groove restores its deformation, the positioning boss can rotate horizontally in the reserved hole of the shell and will not fall out, and the upper cover rotates horizontally with the positioning boss.

[0013] The beneficial effects of the present invention are as follows: the upper cover connection structure of the ultrasonic water meter realizes the upper cover rotating in the vertical direction along the fixed axis and in the horizontal direction along the axis center of the connecting axis, and operations such as reading and communication can be performed in a small space; the slide locking is adopted, which is convenient for installation and not easy to damage the locking structure; the buckle boss and the annular groove are matched, and due to the lever principle, the locking is more secure and the probability of the upper cover falling off is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the upper cover structure of an embodiment of the present invention; Figure 3 This is a schematic diagram of the connecting shaft structure of an embodiment of the present invention; Figure 4 This is a schematic diagram of the upper shell structure of an embodiment of the present invention; In the figure: upper cover 1, connecting shaft 2, upper shell body 3, fixed shaft 4, positioning boss 5, locking groove 6, slideway 7, unloading groove 8, buckle boss 9, shell reserved hole 10, annular groove 11, slideway upper edge 12, slideway lower edge 13, notch 14, protrusion 15, convex ridge 16. DETAILED DESCRIPTION

[0015] The present invention will be further described below by way of embodiments in conjunction with the accompanying drawings.

[0016] See attached Figure 1-4, an ultrasonic water meter upper cover connection structure, comprising an upper cover 1, a connecting shaft 2, and an upper shell body 3; the upper cover 1 and the upper shell body 3 are respectively matched with the connecting shaft 2, and the three are matched with each other to form a whole. Due to the effect of the connection 2, the upper cover can be rotated in two dimensions, horizontally and vertically; A shell reserved hole 10 is provided on the surface of the upper shell shell 3, and an annular groove 11 is provided in the shell reserved hole 10; a notch 14 is opened in the upper cover, and a fixed shaft 4 is symmetrically provided on the two inner side walls of the notch 14; the lower part of the connecting shaft 2 is a circular positioning boss 5, and the upper part of the positioning boss 5 is a protrusion 15. The structures on both sides of the protrusion 15 are symmetrical and the same, and locking grooves 6 are both provided. The opening of the locking groove 6 is a slideway 7, and the slideway 7 is connected to the locking groove 6 as a whole. The slideway 7 includes a slideway upper edge 12 and a slideway lower edge 13 arranged parallel to each other. The slideway upper edge 12 and the slideway lower edge 13 are both parallel to the upper surface of the upper shell shell 3, and the axis of the locking groove 6 is inclined to the slideway upper edge 12, the slideway lower edge 13 and the upper surface of the upper shell shell 3; the fixed shafts 4 on the two inner side walls of the notch 14 of the upper cover 1 slide from the slideway to the locking grooves 6 on both sides of the protrusion 15, and the fixed shaft 4 and With the cooperation of the locking groove 6, the upper cover 1 can be opened and closed in the vertical direction; an annular snap-in boss 9 is provided at the lower part of the positioning boss 5, and the outer diameter of the positioning boss 5 matches the inner diameter of the shell reserved hole 10, and the outer diameter of the snap-in boss 9 matches the inner diameter of the annular snap-in groove 11 in the shell reserved hole 10, and the outer diameter of the snap-in boss 9 is larger than the inner diameter of the shell reserved hole 10; a plurality of longitudinally arranged unloading grooves 8 are provided on the circumference of the positioning boss 5 and the snap-in boss 9, and the unloading groove 8 opens at the bottom of the positioning boss 5; the external force presses the unloading groove 8, the snap-in boss 9 is deformed, and the outer diameter becomes smaller, the positioning boss 5 and the snap-in boss 9 are inserted into the shell reserved hole 10, and after the snap-in boss 9 enters the annular snap-in groove 11 in the shell reserved hole 10, the unloading groove restores its deformation, the positioning boss 5 rotates horizontally in the shell reserved hole 10 and will not fall out, and the upper cover 1 rotates horizontally with the positioning boss 5.

[0017] The lower edge 13 of the slide enters the reserved hole 10 of the shell along the positioning boss 5, and the upper edge 12 of the slide does not enter the reserved hole 10 of the shell; the distance between the upper shell 3 and the upper edge 13 of the slide is smaller than the diameter of the fixed shaft 4, and the fixed shaft cannot slide out of the slide 7 from the locking groove 6, thereby achieving locking.

[0018] The locking groove 6 is arranged obliquely upwardly of the slide 7. After the fixed shaft 4 slides into the locking groove 6 from the slide 7, the sliding direction of the fixed shaft 4 changes due to the upwardly inclined locking groove 6. The fixed shaft 4 slides to the end position of the locking groove 6, which is higher than the lower edge 13 of the slide and does not affect the rotation.

[0019] A plurality of vertically arranged convex ridges 16 are provided on the circumference of the positioning boss 5 to increase the interference fit between the positioning boss 5 and the reserved hole 10 of the housing.

[0020] The convex ridges 16 are located on the circumference of the positioning boss 5 above the buckle boss 9 .

[0021] There are four unloading grooves 8 , which are evenly distributed on the circumference of the positioning boss 5 , dividing the bottom of the positioning boss 5 into four arc parts.

[0022] There are four convex ribs 16 evenly distributed on the circumference of the positioning boss 5 ; the convex ribs 16 and the force unloading grooves 8 are arranged at intervals on the circumference of the positioning boss 5 .

[0023] The positioning boss 5, protrusion 15, locking groove 6, slideway 7, snap boss 9, force unloading groove 8 and convex ridge 16 are integrally injection molded; the upper shell body 3, shell reserved hole 10 and annular groove 11 are integrally injection molded; the upper cover 1, notch 14 and fixed shaft 4 are integrally injection molded.

[0024] An assembly method of the ultrasonic water meter upper cover connection structure comprises the following steps: ① The upper cover 1 and the connecting shaft 2 are assembled together to form component 1; the fixed shaft 4 on the two inner side walls of the notch 14 of the upper cover 1 is slid from the slideway to the locking grooves 6 on both sides of the protrusion 15 of the connecting shaft 2, and the fixed shaft 4 cooperates with the locking groove 6, so that the upper cover 1 can be opened and closed in the vertical direction; ② Install component 1 on the upper shell 3; use external force to compress the positioning boss 5 and the force unloading groove 8 at the bottom of the connecting shaft 2, the snap boss 9 is deformed, the outer diameter becomes smaller, the positioning boss 5 and the snap boss 9 are inserted into the reserved hole 10 of the shell, after the positioning boss 5 enters the reserved hole 10 of the shell, the snap boss 9 cooperates with the annular groove 11, the force unloading groove 8 restores its deformation, the positioning boss 5 can rotate horizontally in the reserved hole 10 of the shell and will not fall out, and the upper cover 1 rotates horizontally with the positioning boss 5.

[0025] The upper cover is the main structure for protecting the LCD screen. Its size is smaller than that of the upper shell. A fixed shaft 4 is injection-molded at its end. It enters the locking groove 6 through the connecting shaft slide 7 and fits with the locking groove 6 to form a connecting structure that rotates in a fixed direction. When there is enough space, the upper cover is opened along the fixed axis to perform operations such as reading or communication.

[0026] The connecting shaft 2 is a main component for connecting the upper cover and the upper shell body, with a locking groove 6 injected on the upper end, a positioning boss 5 and a force-relieving groove 8 injected around it, and a snap boss 9 injected on the lower end. The locking groove consists of two parts, namely the locking groove 6 and the slide 7. The slide 7 is divided into an upper edge 12 and a lower edge 13 of the slide. The upper edge 12 and the lower edge 13 of the slide are respectively parallel to the upper surface of the upper shell body. The slide 7 is connected to the locking groove 6 as a whole. There is a certain angle between the two, and the fixed shaft 4 can slide into the locking groove by the slide; the circular contour of the positioning boss 5 is concentric with the reserved hole 10 of the shell, and the connecting shaft 2 is pressed into the reserved hole 10 of the shell along the positioning boss. The outer diameter of the snap boss 9 is larger than the inner diameter of the reserved hole 10 of the shell, and the force unloading groove 8 is subjected to force and elastically deformed. After the snap boss enters the slot, the force unloading groove recovers its deformation, and the lower edge 13 of the slide enters the reserved hole 10 of the shell. The remaining size of the upper shell body 3 and the upper edge 12 of the slide is smaller than the diameter of the fixed shaft 4, and the fixed shaft cannot slide out of the slide 7 by the locking groove 6, so locking is achieved.

[0027] The locking groove 6 is connected to the slideway 7 and forms a certain angle with the slideway 7. The fixed shaft 4 slides into the slideway 7. The sliding direction of the fixed shaft 4 changes due to the angle at the connection between the slideway and the locking groove. The fixed shaft 4 slides to the end of the locking groove 6 and is higher than the lower edge 13 of the slideway.

[0028] The upper shell body 3 is provided with a shell reserved hole 10 and an annular groove 11 for installing the connecting shaft. The positioning boss 5 of the connecting shaft enters the shell reserved hole 10, the buckle boss 9 cooperates with the annular groove 11, the unloading groove restores the deformation, and the connecting shaft 2 and the upper shell body 3 form a rotatable structure.

Claims

1. An ultrasonic water meter upper cover connection structure, characterized in that: It comprises an upper cover (1), a connecting shaft (2) and an upper shell body (3); the upper cover (1) and the upper shell body (3) are respectively matched with the connecting shaft (2), and the three are matched with each other to form a whole, and due to the action of the connecting shaft, the upper cover can rotate in two dimensions, horizontally and vertically; The upper shell (3) is provided with a shell reserved hole (10) on its surface, and an annular groove (11) is provided in the shell reserved hole (10); the upper cover is provided with a notch (14), and fixed shafts (4) are symmetrically provided on the two inner side walls of the notch (14); the lower part of the connecting shaft (2) is a circular positioning boss (5), the upper part of the positioning boss (5) is a protrusion (15), the two sides of the protrusion (15) have symmetrical structures and are both provided with locking grooves (6), the opening of the locking groove (6) is a slideway (7), and the slideway (7) and the lock are connected. The locking grooves (6) are connected as a whole, the slideway (7) comprises a slideway upper edge (12) and a slideway lower edge (13) arranged parallel to each other, the slideway upper edge (12) and the slideway lower edge (13) are parallel to the upper surface of the upper shell body (3), and the axis of the locking groove (6) is arranged obliquely with the slideway upper edge (12), the slideway lower edge (13) and the upper surface of the upper shell body (3); the fixed shafts (4) on the two inner side walls of the notch (14) of the upper cover (1) slide from the slideway to the locking grooves (6) on both sides of the protrusion (15), respectively, and are fixed The shaft (4) cooperates with the locking groove (6), and the upper cover (1) can be opened and closed in the vertical direction; an annular snap-fitting boss (9) is provided at the lower part of the positioning boss (5); the outer diameter of the positioning boss (5) matches the inner diameter of the reserved hole (10) of the shell; the outer diameter of the snap-fitting boss (9) matches the inner diameter of the annular snap-fitting groove (11) in the reserved hole (10) of the shell; the outer diameter of the snap-fitting boss (9) is larger than the inner diameter of the reserved hole (10) of the shell; longitudinally arranged The plurality of unloading grooves (8) are provided, and the unloading grooves (8) are open at the bottom of the positioning boss (5); when external force presses the unloading grooves (8), the buckle boss (9) is deformed and its outer diameter is reduced, the positioning boss (5) and the buckle boss (9) are inserted into the reserved hole (10) of the shell, and after the buckle boss (9) enters the annular buckle groove (11) in the reserved hole (10) of the shell, the unloading groove recovers its deformation, the positioning boss (5) rotates horizontally in the reserved hole (10) of the shell and will not fall out, and the upper cover (1) rotates horizontally together with the positioning boss (5).

2. The ultrasonic water meter upper cover connection structure according to claim 1, characterized in that: The lower edge (13) of the slideway enters the reserved hole (10) of the shell along with the positioning boss (5), and the upper edge (12) of the slideway does not enter the reserved hole (10) of the shell; the distance between the upper shell (3) and the upper edge (13) of the slideway is smaller than the diameter of the fixed shaft (4), and the fixed shaft cannot slide out of the slideway (7) from the locking groove (6).

3. The ultrasonic water meter upper cover connection structure according to claim 2, characterized in that: The locking groove (6) is arranged obliquely upward of the slideway (7). After the fixed shaft (4) slides from the slideway (7) into the locking groove (6), the sliding direction of the fixed shaft (4) changes due to the upwardly inclined arrangement of the locking groove (6). The fixed shaft (4) slides to the end position of the locking groove (6), which is higher than the lower edge (13) of the slideway.

4. The ultrasonic water meter upper cover connection structure according to claim 1 or 2, characterized in that: A plurality of vertically arranged convex ridges (16) are provided on the circumference of the positioning boss (5).

5. The ultrasonic water meter upper cover connection structure according to claim 4, characterized in that: The convex ridges (16) are located on the circumference of the positioning boss (5) above the snap boss (9).

6. The ultrasonic water meter upper cover connection structure according to claim 1 or 2, characterized in that: The force unloading grooves (8) are four in number and are evenly distributed on the circumference of the positioning boss (5), dividing the bottom of the positioning boss (5) into four circular arcs.

7. The ultrasonic water meter upper cover connection structure according to claim 6, characterized in that: The number of the convex ridges (16) is four, and they are evenly distributed on the circumference of the positioning boss (5); the convex ridges (16) and the force-releasing grooves (8) are arranged at intervals on the circumference of the positioning boss (5).

8. The ultrasonic water meter upper cover connection structure according to claim 1 or 2, characterized in that: The positioning boss (5), the protrusion (15), the locking groove (6), the slideway (7), the buckle boss (9), the force-releasing groove (8) and the convex ridge (16) are integrally injection-molded; the upper shell body (3), the shell reserved hole (10) and the annular groove (11) are integrally injection-molded; and the upper cover (1), the notch (14) and the fixed shaft (4) are integrally injection-molded.

9. A method for assembling the ultrasonic water meter upper cover connection structure according to any one of claims 1 to 8, comprising the following steps: ① The upper cover (1) and the connecting shaft (2) are assembled together to form component 1; the fixed shafts (4) on the two inner side walls of the notch (14) of the upper cover (1) are respectively slid from the slideways into the locking grooves (6) on both sides of the protrusion (15) of the connecting shaft (2); the fixed shafts (4) cooperate with the locking grooves (6), and the upper cover (1) can be opened and closed in the vertical direction; ② Install component 1 onto the upper shell (3); use external force to compress the positioning boss (5) and the unloading groove (8) at the lower part of the connecting shaft (2), so that the buckle boss (9) is deformed and the outer diameter becomes smaller, and the positioning boss (5) and the buckle boss (9) are inserted into the reserved hole (10) of the shell. After the positioning boss (5) enters the reserved hole (10) of the shell, the buckle boss (9) cooperates with the annular groove (11), and the unloading groove (8) recovers its deformation. The positioning boss (5) can rotate horizontally in the reserved hole (10) of the shell without falling out, and the upper cover (1) rotates horizontally together with the positioning boss (5).

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