CN110636721A

CN110636721A - Display meter shell

Info

Publication number: CN110636721A
Application number: CN201911079349.8A
Authority: CN
Inventors: 冀智; 李振
Original assignee: Tangshan City Fengrun District Zhanwang Automation Equipment Co Ltd
Current assignee: Tangshan City Fengrun District Zhanwang Automation Equipment Co Ltd
Priority date: 2019-11-07
Filing date: 2019-11-07
Publication date: 2019-12-31
Anticipated expiration: 2039-11-07
Also published as: CN110636721B

Abstract

The invention discloses a display meter shell, which relates to the technical field of meters and comprises a meter main body, a front cover and a rear cover, wherein the meter main body, the front cover and the rear cover are formed by one-step casting through a die; an annular cavity with two sides penetrating is formed in the front cover; annular bulges and annular closing-in are formed on the inner side wall of the front cover in a protruding mode and are arranged at intervals along the direction of the central line of the annular cavity, an installation groove is formed between the annular bulges and the annular closing-in a surrounding mode, and the machine surface glass is embedded in the installation groove; annular arch and one side butt of machine table glass thickness direction, annular binding off towards the inboard buckle of annular cavity and with machine table glass deviate from annular arch's one side butt. The display meter shell provided by the invention can improve the reliability of the meter, ensure the stable operation of the meter, prolong the service life of the meter and greatly reduce the processing cost.

Description

Display meter shell

Technical Field

The invention relates to the technical field of instruments, in particular to a display meter shell.

Background

The instrument shell can generally play a role in protecting the electronic components inside the instrument shell, so that the use reliability of the instrument can be improved, and the service life of the instrument can be effectively prolonged. The meter case generally includes a meter main body, and a front cover and a rear cover respectively provided on front and rear sides of the meter main body; wherein the inner side of the front cover is fixed with organic watch glass. In current instruments, the front cover is screwed with the retaining ring, and the glass of the instrument is usually pressed by the special retaining ring; for this reason, manufacturers need to prepare at least one set of corresponding casting molds for molding the retaining ring and bear the machining cost of the retaining ring, which results in higher production cost.

Disclosure of Invention

The invention aims to provide a display meter shell, which utilizes an annular bulge and an annular closing-in to respectively tightly support two opposite sides of a piece of machine meter glass, realizes fixed installation of the machine meter glass and greatly reduces the production cost.

The technical purpose of the invention is realized by the following technical scheme:

a display meter casing comprises a meter main body, a front cover and a rear cover which are formed by one-step casting through a mould; an annular cavity with two sides penetrating is formed in the front cover; annular bulges and annular closing-in ports which are arranged at intervals along the direction of the central line of the annular cavity are formed on the inner side wall of the front cover in a protruding mode, an installation groove is formed between the annular bulges and the annular closing-in ports in a surrounding mode, and machine surface glass is embedded in the installation groove; the annular bulge is abutted against one side of the machine surface glass in the thickness direction, and the annular closing-in is bent towards the inner side of the annular cavity and is abutted against one side of the machine surface glass, which deviates from the annular bulge.

By adopting the technical scheme, the annular bulge and the annular opening strip can respectively support the two sides of the machine surface glass tightly, so that the machine surface glass is fixed. Through the mode, the thread processing of the front cover and the snap ring in a matching mode is omitted, a set of casting die of the snap ring and the machining cost of the snap ring are omitted, and the production cost is greatly reduced.

The invention is further configured to: an annular sealing groove is formed between the annular bulge and the inner side wall of the front cover in a surrounding manner; the annular sealing groove is internally embedded with a first sealing ring which is abutted against one side adjacent to the machine surface glass.

By adopting the technical scheme, the first sealing ring is arranged in the annular sealing groove and can tightly support the machine surface glass, so that the sealing performance of the contact position of the annular bulge and the machine surface glass is improved.

The invention is further configured to: a metal ring is also embedded in the mounting groove; the annular closing-in is tightly abutted against one side of the machine surface glass departing from the annular bulge through the metal ring.

By adopting the technical scheme, the annular closing-in is tightly abutted to the machine surface glass through the metal ring, so that the contact area of the machine surface glass can be increased, and the installation stability of the machine surface glass is ensured.

The invention is further configured to: a first fixed shoulder is integrally formed on one side, close to the front cover, of the watch main body; a first matching shoulder used for abutting against the first fixing shoulder is correspondingly formed on one side, close to the watch main body, of the front cover, and a plurality of first fixing bolts which are uniformly distributed in the circumferential direction and are used for being in threaded connection with the first fixing shoulder are arranged on the first matching shoulder; and a second sealing ring is tightly abutted between the first matching shoulder and the first fixing shoulder.

Through adopting above-mentioned technical scheme, compare in the way that traditional screw thread rolled O type circle, through the fixed protecgulum of first fixing bolt, the second sealing washer is compressed tightly to the protecgulum, when guaranteeing sealing strength, its sealing performance's stability is also higher.

The invention is further configured to: a second fixed shoulder is integrally formed on one side of the watch main body close to the rear cover; a second matching shoulder used for being abutted against a second fixing shoulder is correspondingly formed on one side, close to the watch main body, of the rear cover, and a plurality of second fixing bolts which are uniformly distributed in the circumferential direction and are used for being in threaded connection with the second fixing shoulder are arranged on the second matching shoulder; and a third sealing ring is tightly abutted between the second matching shoulder and the second fixing shoulder.

The invention is further configured to: a clapboard is fixedly formed in the watch main body and divides the inner space of the shell into a front cavity close to one side of the front cover and a rear cavity close to one side of the rear cover; the front cavity is internally and fixedly provided with display panels, conversion panels and metal mounting plates which are arranged at intervals along the direction of the central line of the annular cavity; and a terminal plate is fixedly arranged in the rear cavity.

Through adopting above-mentioned technical scheme, the baffle separates casing inner space for unventilated preceding chamber and back chamber, avoids the instrument worker to forget to carry out sealing treatment and influence the instrument normal operating to cable conductor via hole and back lid department. So, when using, only binding post wets and can not lead to the fact very big influence to the operation of instrument, and parts such as baffle can protect display panel, converter plate do not wet to guarantee the instrument normal operating.

The invention is further configured to: the watch main body is provided with a wire outlet hole and a union interface which is used for connecting a sensor and is provided with an external thread; the wire outlet holes and the union interface are communicated with the front cavity, and the number of the wire outlet holes is 2, 3 or 4.

By adopting the technical scheme, the wire outlet hole is communicated with the front cavity, so that the wiring is convenient; simultaneously, the table main part passes through union interface connection sensor, compares in traditional flange joint's structural style, and this kind of connected mode has higher sealing strength, still can save man-hour of installation.

The invention is further configured to: and a power panel is fixedly arranged in the front cavity.

Through adopting above-mentioned technical scheme, with the power strip mounting panel in the front intracavity, avoid the power strip to wet.

The invention is further configured to: a battery box is fixedly arranged in the rear cavity.

By adopting the technical scheme, the battery box is arranged in the rear cavity, so that the corresponding instrument can realize battery power supply; meanwhile, the battery box is arranged in the rear cavity, so that the battery is convenient to replace.

In conclusion, the beneficial technical effects of the invention are as follows:

(1) the watch main body, the front cover and the rear cover are formed in one step by casting, the annular bulges and the annular closing-in are arranged on the inner side of the front cover at intervals, and the watch glass is installed by utilizing the installation groove formed between the annular bulges and the annular closing-in, so that the fixation of the watch glass is realized, the thread processing matched with the front cover and the retaining ring is omitted, the processing cost of a set of casting mold of the retaining ring and the processing cost of the retaining ring is also omitted, and the production cost is greatly reduced;

(2) the rear cover is fixed respectively behind the front cover by means of the first fixing bolt and the second fixing bolt, the second sealing ring and the third sealing ring are arranged at the gap of the rear cover in a matched mode, and compared with a traditional mode that sealing rings are rolled by threads, the sealing strength of the rear cover is higher, the sealing performance of the display meter shell can be greatly improved, and the reliability and the service life of the instrument can be improved.

Drawings

FIG. 1 is a schematic half-sectional view showing the overall structure of example 1 of the present invention;

FIG. 2 is a left side view of the whole structure of embodiment 1 of the present invention;

FIG. 3 is a schematic half-sectional view showing the entire structure of example 2 of the present invention.

Reference numerals: 1. a watch body; 101. a first fixed shoulder; 102. a second fixed shoulder; 2. a front cover; 21. a first mating shoulder; 22. an annular projection; 23. closing up in an annular manner; 3. a rear cover; 31. a second mating shoulder; 4. a first fixing bolt; 5. a second fixing bolt; 6. a partition plate; 7. a wire outlet hole; 8. a union interface; 9. machine surface glass; 10. a first seal ring; 11. a metal ring; 12. a display panel; 13. a conversion plate; 14. a metal mounting plate; 15. a power panel; 16. a terminal plate; 17. a battery case; 18. a second seal ring; 19. and a third sealing ring.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1-2, a display case comprises a case body 1 having a cavity therein, wherein two opposite sides of the case body 1 are respectively provided with a front cover 2 and a rear cover 3, the front cover 2 and the rear cover 3 are both hollow and simultaneously communicated with the internal space of the case body 1, and the internal spaces of the three parts jointly enclose the cavity for mounting electronic components. It should be noted that, the watch main body 1, the front cover 2 and the rear cover 3 are all cast and formed in one step by a hard die aluminum casting double-die opening mode, machining is reduced as much as possible, machining cost is reduced, and meanwhile, the shell can achieve the waterproof grade of IP68 under the condition that no treatment is performed.

As shown in fig. 1, a first fixing shoulder 101 and a second fixing shoulder 102 are integrally formed on both sides of the watch body 1 near the front cover 2 and the rear cover 3, respectively; correspondingly, a first engaging shoulder 21 is integrally formed on the side of the front cover 2 adjacent to the watch body 1, and a second engaging shoulder 31 is integrally formed on the rear cover 3 adjacent to the watch body 1 at one time. The front cover 2 and the back cover 3 are mounted on the watch body 1 in a similar manner in actual mounting. Taking the front cover 2 as an example, the first matching shoulder 21 abuts against the first fixing shoulder 101, at least 3 first fixing bolts 4 are uniformly distributed on the circumference of the first matching shoulder 21, and each first fixing bolt 4 is threaded through the first fixing shoulder 101, so that the front cover 2 is fully fixed on the watch body 1; meanwhile, in order to ensure the sealing strength between the front cover 2 and the watch main body 1, a second sealing ring 18 is tightly abutted between the first matching shoulder 21 and the first fixing shoulder 101.

Similarly, the second mating shoulder 31 abuts against the second fixing shoulder 102, and the two are fixedly connected through at least three second fixing bolts 5, and a third sealing ring 19 for sealing is tightly arranged between the two. The second 18 and third 19 sealing rings may each be conventional O-rings. Compare in traditional screw thread roll the sealing mode of O type circle, through bolt fastening protecgulum 2 and hou gai 3, the protecgulum 2, the degree of compressing tightly of hou gai 3 to the sealing washer is controllable and stable, not only can fully guarantee the seal strength of casing in protecgulum 2 and 3 seams of hou gai, can guarantee its sealing performance's stability moreover.

Specifically, the first fixing bolt 4 and the second fixing bolt 5 may be both hexagon socket head cap bolts. When actually processed, the bolt holes for fitting the first fixing bolt 4 and the second fixing bolt 5 on the watch body 1 may be processed by casting and then tapping. For example, when the required threaded hole is a threaded hole of M3 × 6, the corresponding through hole may be formed in one step by casting, and then each through hole may be tapped in turn to be a threaded hole of M3 × 6 by tapping. Moreover, when the front cover 2 is actually installed, a seal mark can be marked on the first fixing bolt 4, the instrument operation is carried out by a manual operator, and the sealing strength of the front cover 2 of the instrument is not influenced by the level of an operator.

As shown in fig. 1, a partition plate 6 for partitioning the internal space of the case is further integrally formed in the watch body 1, and the partition plate 6 partitions the internal space of the case into a front chamber on the side close to the front cover 2 and a rear chamber on the side close to the rear cover 3. If the positions of the front cover 2 and the rear cover 3 on the shell are respectively regarded as the front side and the rear side of the shell, the upper side and the lower side of the shell are respectively provided with a wire outlet 7 and a union interface 8.

The number of the outlet holes 7 can be set according to the requirements of users, and can be set to be 2, 3 or 4. Conventionally, the number of outlet holes 7 is typically 4; however, considering that the user basically cannot use more than two outlet holes 7, machining these extra outlet holes 7 not only increases the machining cost of the meter, but also doubles the probability of leakage; therefore, the number of the outlet holes 7 is preferably 2. When a user needs more wire outlet holes 7, an external distribution box can be added outside the shell, and a multi-core cable is led out from the wire outlet holes 7 to the distribution box.

During specific machining, the two wire outlet holes 7 can be arranged on two opposite sides of the watch main body 1, for example, the two wire outlet holes 7 can be symmetrically arranged on the left side and the right side of the watch main body 1, and the two wire outlet holes 7 are communicated with the front cavity. Meanwhile, each wire outlet hole 7 can be processed and formed in a mode of casting and tapping; for example, when the outlet hole 7 requires an external thread of M20 × 1.5, a hole with an inner diameter of Φ 8 and an outer diameter of Φ 18 may be formed in one step by casting, and then a thread of M20 × 1.5 may be tapped on the outer ring of the outlet hole 7 by tapping.

The union interface 8 may likewise communicate with the anterior chamber. Meanwhile, by providing a union interface 8 at the lower side of the watch body 1, the display watch case can be connected to the sensor through the union. Specifically, the portion of the union interface 8 for connecting the sensor is provided with external threads and is formed in one step by casting. Compared with the traditional flange connection mode, the flange connection structure has higher sealing strength and can save the installation time.

As shown in fig. 1, the front cover 2 may be configured to approximate a circular truncated cone; the front cover 2 is hollow to form an annular cavity, the annular cavity penetrates through the front cover 2 along the central line of the annular cavity, and one side with a larger sectional area is communicated with the inner space of the watch body 1. Annular bulge 22 and annular binding off 23 have in its protruding shaping of one side of keeping away from table main part 1 on the protecgulum 2 inside wall, and annular bulge 22 is the interval setting with annular binding off 23 along the central line direction of annular cavity, and encloses into between the two to have the mounting groove. The mounting groove is embedded with machine meter glass 9, the machine meter glass 9 can adopt transparent standard glass for water meters, and the specific size can be selected according to the requirement. In order to ensure the sealing strength, an annular sealing groove is formed between the annular bulge 22 and the inner side wall of the front cover 2 in an enclosing manner, a first sealing ring 10 is embedded in the annular sealing groove, and the first sealing ring 10 can also adopt a conventional O-shaped ring; the annular bead 22 abuts against the front side of the watch glass 9 via the first sealing ring 10. Meanwhile, one side of the machine surface glass 9 departing from the annular bulge 22 is also provided with an annular metal ring 11 in an abutting mode, the metal ring 11 is embedded in the installation groove, and the annular closing-in 23 bends towards the inner side of the annular cavity and tightly abuts against one side of the machine surface glass 9 departing from the annular bulge 22 through the metal ring 11.

The front cover 2 is also provided with a display panel 12, a conversion plate 13 and a metal mounting plate 14 at intervals in sequence on one side of the watch glass 9 close to the watch main body 1, namely, the display panel 12, the conversion plate 13 and the metal mounting plate 14 are all positioned in the front cavity. And a terminal plate 16 is fixedly arranged in the rear cavity, and the terminal plate 16 can be fixedly formed on the inner side wall of the watch main body 1.

As shown in fig. 1, in order to supply power to the meter, in one embodiment, a power board 15 may be further fixedly disposed in the front cavity, and the power board 15 may be fixed on an inner side wall of the front cover 2 or may be fixedly formed on an inner side wall of the meter main body 1.

In order to supply power, as shown in fig. 3, in another embodiment, the meter corresponding to the casing can be powered by a battery, the overall length of the display meter casing can be prolonged, and a battery box 17 is arranged in the rear cavity. For example, in the case where the watch body 1 is inconvenient, the inner cavity of the back cover 3 may be deepened so that a cavity for accommodating the battery case 17 is formed inside the back cover 3.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A display case, comprising: comprises a watch main body (1), a front cover (2) and a rear cover (3) which are formed by one-step casting through a mould; an annular cavity with two sides penetrating is formed in the front cover (2); annular bulges (22) and annular closing-in openings (23) which are arranged at intervals along the direction of the central line of the annular cavity are formed on the inner side wall of the front cover (2) in a protruding mode, an installation groove is formed between the annular bulges (22) and the annular closing-in openings (23) in a surrounding mode, and machine surface glass (9) is embedded in the installation groove; annular arch (22) and machine table glass (9) thickness direction's one side butt, annular binding off (23) are towards the inboard one side butt that bends of annular cavity and deviates from annular arch (22) with machine table glass (9).

2. A display case according to claim 1, wherein: an annular sealing groove is formed between the annular bulge (22) and the inner side wall of the front cover (2); and a first sealing ring (10) which is abutted against one side adjacent to the machine surface glass (9) is embedded in the annular sealing groove.

3. A display case according to claim 1, wherein: a metal ring (11) is also embedded in the mounting groove; the annular closing-in opening (23) is tightly abutted against one side of the watch glass (9) departing from the annular bulge (22) through the metal ring (11).

4. A display case according to claim 1, wherein: a first fixed shoulder (101) is integrally formed on one side, close to the front cover (2), of the watch main body (1); a first matching shoulder (21) used for abutting against the first fixing shoulder (101) is correspondingly formed on one side, close to the watch main body (1), of the front cover (2), and a plurality of first fixing bolts (4) which are uniformly distributed on the circumference and used for being in threaded connection with the first fixing shoulder (101) are arranged on the first matching shoulder (21); and a second sealing ring (18) is tightly propped between the first matching shoulder (21) and the first fixing shoulder (101).

5. A display case according to claim 1, wherein: a second fixed shoulder (102) is integrally formed on one side, close to the rear cover (3), of the watch main body (1); a second matching shoulder (31) used for abutting against a second fixing shoulder (102) is correspondingly formed on one side, close to the watch main body (1), of the rear cover (3), and a plurality of second fixing bolts (5) which are uniformly distributed on the circumference and used for being in threaded connection with the second fixing shoulder (102) are arranged on the second matching shoulder (31); and a third sealing ring (19) is tightly propped between the second matching shoulder (31) and the second fixed shoulder (102).

6. A display case according to claim 1, wherein: a clapboard (6) is fixedly formed in the watch main body (1), and the clapboard (6) divides the inner space of the shell into a front cavity close to one side of the front cover (2) and a rear cavity close to one side of the rear cover (3); the front cavity is internally and fixedly provided with display panels (12), conversion panels (13) and metal mounting plates (14) which are arranged at intervals along the direction of the central line of the annular cavity; a terminal plate (16) is fixedly arranged in the rear cavity.

7. A display case watch case according to claim 6, characterised in that: the watch body (1) is provided with a wire outlet hole (7) and a union interface (8) which is used for connecting a sensor and is provided with an external thread; the wire outlet holes (7) and the union interface (8) are communicated with the front cavity, and the number of the wire outlet holes (7) is 2, 3 or 4.

8. A display watch case according to claim 6 or 7, characterised in that: and a power panel (15) is fixedly arranged in the front cavity.

9. A display watch case according to claim 6 or 7, characterised in that: a battery box (17) is fixedly arranged in the rear cavity.