Automatic assembling equipment for water meter plastic shell

Abstract

The automatic water meter plastic shell assembling equipment comprises a base, a cavity is formed in the base, a supporting wall is arranged at the center of the rear side of the top face of the base, a top air cylinder is arranged at the top of the supporting wall, the movable end of the top air cylinder is arranged downwards, and the movable end of the top air cylinder is fixedly connected with a pressing block; the left side and the right side of the front side of the top face of the base are each provided with a reset penetrating opening, an automatic calibration mechanism is arranged at the position, between the two reset penetrating openings, of the top face of the base, and reset mechanisms are arranged at the positions, between the two reset penetrating openings, of the top face of the base. The automatic correction of the axes of the plastic shell and the metal shell is successfully realized by arranging the clamping head and the clamping opening and matching with the arrangement of the buffer, so that the clamping head and the clamping opening are buckled in a precise alignment state, high-quality safety production is completed, meanwhile, the automation degree is high, the assembly efficiency of the plastic shell and the metal shell is greatly improved, and the requirement of large-batch production can be met.

Description

Technical Field

[0001] The invention relates to the technical field of water meter assembly equipment, in particular to automatic assembly equipment for a water meter plastic shell. Background Art

[0002] A water meter is an instrument used to measure water consumption and is widely used in people's daily production and life. It includes a metal shell and a plastic shell. The main functions of the plastic shell are: dustproof and waterproof, corrosion-resistant, and electrical insulation.

[0003] Currently, the assembly process of existing water meter plastic shells mainly relies on manual pressing and knocking.

[0004] However, in the actual production process of water meters, although the manual pressing and knocking operations are relatively convenient, there are the following problems: First, the manual pressing force is prone to unevenness, which causes the plastic shell to be skewed and the assembly accuracy is low; Second, the plastic shell is easily damaged by knocking with a wooden hammer, and the snapping point between the plastic shell and the metal shell is subjected to excessive force and breaks, resulting in a loose snapping; In summary, manual operation is inefficient and the production quality is poor, which makes it difficult to meet the needs of mass production. For this reason, an automatic assembly device for the plastic shell of a water meter is proposed. Summary of the Invention

[0005] The object of the present invention is to provide an automatic assembly device for a water meter plastic shell to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an automatic assembly device for a water meter plastic housing, comprising a base, a cavity being provided inside the base, a support wall being provided at the center of the rear side of the top surface of the base, a top cylinder being provided on the top of the support wall, a movable end of the top cylinder being provided downwardly, and a pressure block being fixedly connected to the movable end of the top cylinder;

[0007] The left and right sides of the top front side of the base are both provided with reset holes, and the reset holes are connected to the cavity inside the base;

[0008] An automatic calibration mechanism is provided on the top surface of the base, located between the two reset holes;

[0009] The top surface of the base is provided with a reset mechanism at two reset holes;

[0010] The automatic calibration mechanism supports a plastic shell, and the reset mechanism supports a metal shell. The automatic calibration mechanism is also used to automatically calibrate the axis of the plastic shell and the metal shell, and the reset mechanism is also used to remove the installed plastic shell and metal shell.

[0011] Preferably, the pressing block is located between the two reset holes, and the bottom surface of the pressing block is arranged horizontally.

[0012] Preferably, the pressing block is in the shape of a cylinder, the supporting wall comprises a bottom vertical section, a middle inclined section and a top horizontal section, and the top cylinder is arranged in the top horizontal section of the supporting wall.

[0013] Preferably: the reset mechanism includes a base plate, a reset cylinder, a side rod, a through-hole, a V-shaped positioning block, a stop block, a connecting block, a limit column and a sleeve. The base plate is arranged in the cavity inside the base. Two side rods are provided, which are respectively located on both sides of the front end of the top of the base. The two side rods extend out of the top surface of the base from the two reset through-holes respectively.

[0014] Preferably, the through opening is formed in the side wall of the side rod, the through opening passes through the left and right side walls of the side rod, the V-shaped positioning block is fixedly connected to the top surface of the side rod, and the stop block is fixedly connected to the outer side wall of the V-shaped positioning block.

[0015] Preferably, the connecting block is fixedly connected to the top surface of the base, the connecting block is in an inverted Z shape, the reset cylinder is fixedly connected to the upper bottom surface of the connecting block, and the movable end of the reset cylinder is fixedly connected to the rear end of the base plate.

[0016] Preferably, the reset cylinder passes through the top surface of the base to the cavity inside the base, and the bottom plate is in a convex shape.

[0017] Preferably, two sleeves are provided, which are respectively provided at both sides of the front end of the base plate; two limiting columns are provided, which are respectively fixedly connected to the inner top surface of the base and located directly above the sleeve; the limiting columns pass through the sleeve and are slidably connected thereto.

[0018] Preferably: the automatic calibration mechanism includes a mounting seat, a buffer, a linear guide rail, a placement plate and a shell positioning block, and two of the mounting seat, buffer and shell positioning block are provided. The linear guide rail is provided on the top surface of the base in the middle of the two reset openings, and the placement plate is provided on the linear guide rail. The two shell positioning blocks are symmetrically fixedly connected to the left and right sides of the top surface of the placement plate, the two mounting seats are fixedly connected to the left and right sides of the placement plate, and the buffer is fixedly connected to the mounting seat. The movable ends of the buffer facing the placement plate are both attached to the left or right side of the placement plate.

[0019] Preferably: both sides of the bottom surface of the plastic shell are provided with clamps, both sides of the left and right sides of the metal shell are provided with protrusions, both sides of the top surface of the metal shell are provided with bayonets that match the clamps, the plastic shell is inverted on the placement plate and limited by two shell positioning blocks, the metal shell is inverted between two stop blocks and limited by two V-shaped positioning blocks, wherein the protrusions are placed in the recesses of the V-shaped positioning blocks, and pads are provided at the four corner edges of the bottom surface of the base.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This device, through the setting and cooperation of the base, reset mechanism and automatic calibration mechanism, utilizes the placement plate and the shell positioning block to support and position the inverted plastic shell, utilizes the V-shaped positioning block and the stop block to support and position the inverted metal shell, utilizes the top cylinder to drive the pressure block to press the metal shell onto the plastic shell, utilizes the placement plate set on the linear guide rail to be able to move freely left and right, and cooperates with the setting of the buffer to limit the left and right movement of the placement plate from being violent, successfully realizes the automatic correction of the axis of the plastic shell and the metal shell during the assembly process, so that the clamping head and the bayonet are buckled in a state of precise alignment, completing high-quality, safe production with good consistency, and at the same time, the whole composed of the plastic shell and the metal shell is taken out of the placement plate by the upward movement of the reset cylinder output end, with a high degree of automation, which greatly improves the assembly efficiency of the plastic shell and the metal shell and can meet the needs of mass production.

[0022] 2. The modular design of the V-shaped positioning block and the shell positioning block of this device allows the device to match the corresponding V-shaped positioning block and the shell positioning block according to the actual shape of the metal shell and the plastic shell, which greatly improves the scope of use of the device, improves its utilization rate, and thus saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings. Obviously, the drawings described below are only some embodiments of the present invention, and those skilled in the art can derive other drawings based on these drawings without inventive effort. Among them:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 Schematic diagram of the structure of the reset mechanism in the present invention;

[0026] Figure 3 Schematic diagram of the structure of the automatic calibration mechanism of the present invention;

[0027] Figure 4 It is a front view of the present invention;

[0028] Figure 5 A top view of the present invention;

[0029] Figure 6 It is a structural schematic diagram of the clamp head and the clamp mouth in the present invention.

[0030] In the figure: 1. base; 101. foot; 102. reset opening; 2. support wall; 3. top cylinder; 301. pressure block; 4. reset mechanism; 401. bottom plate; 402. reset cylinder; 403. side rod; 404. through-opening; 405. V-shaped positioning block; 406. stop block; 407. connecting block; 408. limiting column; 409. sleeve; 5. automatic calibration mechanism; 501. mounting seat; 502. buffer; 503. linear guide rail; 504. placement plate; 505. housing positioning block; 6. plastic housing; 601. clamping head; 602. bayonet; 603. metal shell; 604. bump. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention 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. Therefore, they cannot be understood as limitations on the present invention.

[0033] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0034] Reference Figure 1-6 As shown, the present invention provides a technical solution for automatic assembly equipment of water meter plastic shell:

[0035] Reference Figure 1 As shown, an automatic assembly device for the plastic shell of a water meter includes a base 1, a cavity is provided inside the base 1, a support wall 2 is provided at the center of the rear side of the top surface of the base 1, a top cylinder 3 is provided on the top of the support wall 2, the movable end of the top cylinder 3 is set downward, and the movable end of the top cylinder 3 is fixedly connected to a pressure block 301.

[0036] Reference Figure 1As shown, it should be noted that the pressure block 301 is located in the middle of the two reset holes 102, the bottom surface of the pressure block 301 is set horizontally, the shape of the pressure block 301 is cylindrical, and it can also be a cube, etc. The support wall 2 includes a bottom vertical section, a middle inclined section and a top horizontal section, and the top cylinder 3 is set in the top horizontal section of the support wall 2.

[0037] Reference Figure 1 As shown, the left and right sides of the top front side of the base 1 are provided with reset holes 102, the reset holes 102 are connected to the cavity inside the base 1, the top surface of the base 1 is provided with an automatic calibration mechanism 5 at the middle of the two reset holes 102, and the top surface of the base 1 is provided with a reset mechanism 4 at the two reset holes 102. Figure 1 As shown, feet 101 are provided at the four corner edges of the bottom surface of the base 1 to make the base 1 more stable.

[0038] It should be noted that the automatic calibration mechanism 5 supports a plastic shell 6, and the reset mechanism 4 supports a metal shell 603. The automatic calibration mechanism 5 is also used to automatically calibrate the axis of the plastic shell 6 and the metal shell 603. The reset mechanism 4 is also used to remove the installed plastic shell 6 and the metal shell 603 as a whole, wherein the metal shell 603 and the plastic shell 6 are components of the water meter. This device is used to assemble the plastic shell 6 on the metal shell 603 with high efficiency and high assembly accuracy. Further, refer to Figure 6 As shown, both sides of the bottom surface of the plastic shell 6 are provided with clamping heads 601, both sides of the left and right sides of the metal shell 603 are provided with protrusions 604, and both sides of the top surface of the metal shell 603 are provided with snap-in slots 602 that match the clamping heads 601. The plastic shell 6 is inverted on the placement plate 504 and is limited by two shell positioning blocks 505. The metal shell 603 is inverted between the two stop blocks 406 and is limited by two V-shaped positioning blocks 405, wherein the protrusion 604 is placed in the recess of the V-shaped positioning block 405.

[0039] Reference Figure 2 As shown, the reset mechanism 4 includes a bottom plate 401, a reset cylinder 402, a side rod 403, a through-hole 404, a V-shaped positioning block 405, a stopper 406, a connecting block 407, a limiting column 408 and a sleeve 409. The bottom plate 401 is arranged in the cavity inside the base 1, and two side rods 403 are provided, which are respectively located on both sides of the front end of the top surface of the bottom plate 401. The two side rods 403 extend out of the top surface of the base 1 from the two reset through-holes 102 respectively.

[0040] It should be noted that the through-hole 404 is opened in the side wall of the side rod 403, and the through-hole 404 passes through the left and right side walls of the side rod 403. The V-shaped positioning block 405 is fixedly connected to the top surface of the side rod 403, the stop block 406 is fixedly connected to the outer wall of the V-shaped positioning block 405, the connecting block 407 is fixedly connected to the top surface of the base 1, and the connecting block 407 is in an inverted Z shape. The reset cylinder 402 is fixedly connected to the upper bottom surface of the connecting block 407, and the movable end of the reset cylinder 402 is fixedly connected to the rear end of the base plate 401. The reset cylinder 402 passes through the top surface of the base 1 to the cavity inside the base 1. The shape of the base 401 is convex. There are two sleeves 409, which are respectively arranged on both sides of the front end of the base 401. There are two limit columns 408, which are respectively fixedly connected to the inner top surface of the base 1 and located directly above the sleeve 409. The limit column 408 passes through the sleeve 409 and is slidably connected thereto.

[0041] Reference Figure 3 As shown, the automatic calibration mechanism 5 includes a mounting seat 501, a buffer 502, a linear guide rail 503, a placement plate 504 and a shell positioning block 505. There are two mounting seats 501, two buffers 502 and two shell positioning blocks 505. The linear guide rail 503 is arranged on the top surface of the base 1 in the middle of the two reset openings 102. The placement plate 504 is arranged on the linear guide rail 503. The two shell positioning blocks 505 are symmetrically fixedly connected to the left and right sides of the top surface of the placement plate 504. The two mounting seats 501 are fixedly connected to the left and right sides of the placement plate 504. The buffer 502 is fixedly connected to the mounting seat 501. The movable ends of the buffer 502 facing the placement plate 504 are both attached to the left or right side of the placement plate 504.

[0042] It should be noted that the buffer 502 is a prior art and is used in this device to buffer the left and right movement of the placement plate 504 to prevent the clamp 601 from breaking due to the instantaneous movement of the placement plate 504, thereby causing the assembly of the plastic shell 6 and the metal shell 603 to fail.

[0043] Now let's explain the working principle of this device through its working process: Figure 5 and Figure 6As shown, when the plastic shell 6 is assembled on the metal shell 603 using the present device, the plastic shell 6 is first inverted on the placement plate 504. The plastic shell 6 is limited by the shell positioning blocks 505 on both sides of the top surface of the placement plate 504, so that the plastic shell 6 cannot move in the horizontal direction. Then, the protrusions 604 on the metal shell 603 are aligned with the recesses of the V-shaped positioning blocks 405, and the metal shell 603 is placed on the two V-shaped positioning blocks 405 in an inverted posture, so that the metal shell 603 is limited and cannot move in the horizontal direction. It should be noted that the shell positioning blocks 505 and the V-shaped positioning blocks 405 are both removable and replaceable. In actual use, the corresponding shell positioning blocks 505 or V-shaped positioning blocks 405 can be adapted according to the specific shapes and sizes of the plastic shell 6 and the metal shell 603. The operation is convenient, which makes the application range of the present device wider. The above-mentioned shell positioning blocks 505 and V-shaped positioning blocks 405 are generally fixed to the corresponding placement plate 504 and side rods 403 by bolts in the prior art, which are easy to disassemble and replace.

[0044] After the plastic shell 6 and the metal shell 603 are positioned, the top cylinder 3 is started, and the output end of the top cylinder 3 extends downward, and the pressure block 301 moves downward. When the pressure block 301 just starts to contact the bottom surface of the metal shell 603, the reset cylinder 402 is started, so that the output end of the reset cylinder 402 moves downward with the pressure block 301, and then drives the bottom plate 401 to move downward, so that the V-shaped positioning block 405 moves downward. In this process, the limiting column 408 slides in the sleeve 409, and the limiting column 408 and the sleeve 409 are used to move the V-shaped positioning block 405 downward. 9, the setting makes the up and down movement of the bottom plate 401 more stable without shaking. The metal shell 603 will gradually approach the plastic shell 6 under the drive of the V-shaped positioning block 405 and the downward pressure of the pressure block 301, until the clamping head 601 and the bayonet 602 are buckled together, thereby completing the assembly of the plastic shell 6 on the metal shell 603. After that, the whole composed of the plastic shell 6 and the metal shell 603 is taken out from the placement plate 504 during the upward movement of the output end of the reset cylinder 402, and the staff can take it out manually, which is convenient and efficient.

[0045] The process of engaging the clamp head 601 and the bayonet 602 is now described in detail to explain how the automatic calibration mechanism 5 can automatically calibrate the axis of the plastic shell 6 and the metal shell 603, thereby automatically aligning the clamp head 601 and the bayonet 602 and engaging them smoothly. The details are as follows:

[0046] Reference Figure 5 and Figure 6As shown, the clamping head 601 is arranged on the bottom edge of the plastic shell 6, and there are two of them, which are symmetrically arranged, and the bayonet 602 is arranged at the corresponding position on the top surface of the metal shell 603. It should be noted that the material of the clamping head 601 is plastic, which has a certain elasticity. It includes a hook, and the bayonet 602 is correspondingly provided with a hook groove. When the metal shell 603 is pressed down on the plastic shell 6, if the axis of the plastic shell 6 and the metal shell 603 is the same, the two clamping heads 601 on the plastic shell 6 will be compressed and bent into the bayonet 602. During the process, the pressure exerted by the left-side bayonet 602 on the inclined surface of the hook on the left-side clamping head 601 will cause the plastic shell 6 to have a tendency to move to the left. Similarly, the pressure exerted by the right-side bayonet 602 on the inclined surface of the hook on the right-side clamping head 601 will cause the plastic shell 6 to have a tendency to move to the right. Since the plastic shell 6 and the metal shell 603 have the same axis, the clamping head 601 enters the bayonet 602 synchronously. At this time, the clamping head 601 will smoothly and accurately engage with the bayonet 602, thereby completing the assembly of the plastic shell 6.

[0047] If the axes of the plastic shell 6 and the metal shell 603 are not the same, that is, when the clamp 601 on one side can directly enter the bayonet 602 on that side, the clamp 601 on the other side will continue to make the plastic shell 6 have a tendency to move to the right, while the tendency of the plastic shell 6 to move to the left is zero, which is not equal to the tendency to move to the right. At this time, if there is no linear guide 503, forcibly assembling the plastic shell 6 and the metal shell 603 will cause the clamp 601 and the bayonet 602 to be fastened together without precise alignment, which will not only be loose, but may even cause the clamp 601 to break, thereby damaging the plastic shell 6. The shell 6 further reduces the assembly efficiency of the plastic shell 6, and the device uses the setting of the linear guide rail 503 to enable the placement plate 504 to move left and right, so that it automatically moves when the plastic shell 6 has a tendency to move, and then automatically calibrates the axis of the plastic shell 6 and the metal shell 603. In this process, the setting of the buffer 502 is used to limit the left and right movement of the placement plate 504, so that the stress on the clamping head 601 will not be concentrated instantly, thereby avoiding damage or breakage of the clamping head 601, and improving the safety of the automatic calibration of the axis of the plastic shell 6 and the metal shell 603.

[0048] The device is provided with and cooperates with the base 1, the reset mechanism 4 and the automatic calibration mechanism 5, etc., and utilizes the placement plate 504 and the shell positioning block 505 to support and position the inverted plastic shell 6, utilizes the V-shaped positioning block 405 and the stop block 406 to support and position the inverted metal shell 603, utilizes the top cylinder 3 to drive the pressure block 301 to press the metal shell 603 onto the plastic shell 6, utilizes the placement plate 504 set on the linear guide rail 503 to move freely left and right, and cooperates with the setting of the buffer 502 to limit the left and right movement of the placement plate 504 The movement is not violent, and the axis of the plastic shell 6 and the metal shell 603 is automatically corrected during the assembly process of the plastic shell 6 and the metal shell 603, so that the clamping head 601 and the bayonet 602 are buckled in a precisely aligned state, completing high-quality and safe production with good consistency. At the same time, the whole composed of the plastic shell 6 and the metal shell 603 is moved upward by the output end of the reset cylinder 402 and taken out from the placement plate 504, with a high degree of automation, which greatly improves the assembly efficiency of the plastic shell 6 and the metal shell 603 and can meet the needs of mass production.

[0049] The modular design of the V-shaped positioning block 405 and the shell positioning block 505 allows the device to match the corresponding V-shaped positioning block 405 and the shell positioning block 505 according to the actual shapes of the metal shell 603 and the plastic shell 6, greatly improving the scope of use of the device, increasing its utilization rate, and thus saving costs.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An automatic assembly device for a water meter plastic housing, comprising a base (1), wherein a cavity is provided inside the base (1), and characterized in that: A support wall (2) is provided at the center of the rear side of the top surface of the base (1), a top cylinder (3) is provided on the top of the support wall (2), the movable end of the top cylinder (3) is arranged downward, and a pressure block (301) is fixedly connected to the movable end of the top cylinder (3); The left and right sides of the front side of the top surface of the base (1) are both provided with reset holes (102); the top surface of the base (1) is provided with an automatic calibration mechanism (5) located between the two reset holes (102); and the top surface of the base (1) is provided with a reset mechanism (4) located at the two reset holes (102); The automatic calibration mechanism (5) supports a plastic shell (6), and the reset mechanism (4) supports a metal shell (603). The automatic calibration mechanism (5) is also used to automatically calibrate the axis of the plastic shell (6) and the metal shell (603), and the reset mechanism (4) is also used to remove the installed plastic shell (6) and the metal shell (603) as a whole.

2. The automatic assembly equipment for plastic shell of water meter according to claim 1, characterized in that: The pressing block (301) is located between the two reset holes (102), and the bottom surface of the pressing block (301) is arranged horizontally.

3. The automatic assembly equipment for plastic shell of water meter according to claim 2 is characterized by: The pressing block (301) is in the shape of a cylinder, the supporting wall (2) comprises a bottom vertical section, a middle inclined section and a top horizontal section, and the top cylinder (3) is arranged in the top horizontal section of the supporting wall (2).

4. The automatic assembly equipment for plastic shell of water meter according to claim 2, characterized in that: The reset mechanism (4) comprises a bottom plate (401), a reset cylinder (402), a side rod (403), a through hole (404), a V-shaped positioning block (405), a stopper (406), a connecting block (407), a limiting column (408) and a sleeve (409); the bottom plate (401) is arranged in a cavity inside the base (1); two side rods (403) are arranged, respectively located on both sides of the front end of the top surface of the bottom plate (401); the two side rods (403) respectively extend out of the top surface of the base (1) from the two reset through holes (102).

5. The automatic assembly equipment for plastic shell of water meter according to claim 4, characterized in that: The through opening (404) is formed on the side wall of the side rod (403), and the through opening (404) passes through the left and right side walls of the side rod (403). The V-shaped positioning block (405) is fixedly connected to the top surface of the side rod (403), and the stop block (406) is fixedly connected to the outer side wall of the V-shaped positioning block (405).

6. The automatic assembly equipment for plastic shell of water meter according to claim 5, characterized in that: The connection block (407) is fixedly connected to the top surface of the base (1); the connection block (407) is in an inverted Z shape; the reset cylinder (402) is fixedly connected to the upper bottom surface of the connection block (407); and the movable end of the reset cylinder (402) is fixedly connected to the rear end of the bottom plate (401).

7. The automatic assembly equipment for plastic shell of water meter according to claim 6, characterized in that: The resetting cylinder (402) penetrates the top surface of the base (1) to the cavity inside the base (1), and the bottom plate (401) is in the shape of a convex letter.

8. The automatic assembly equipment for plastic shell of water meter according to claim 7, characterized in that: Two sleeves (409) are provided, which are respectively arranged at both sides of the front end of the bottom plate (401); two limit posts (408) are provided, which are respectively fixedly connected to the inner top surface of the base (1) and located directly above the sleeves (409); and the limit posts (408) pass through the sleeves (409) and are slidably connected thereto.

9. The automatic assembly equipment for plastic shell of water meter according to claim 1 or 8, characterized in that: The automatic calibration mechanism (5) comprises a mounting seat (501), a buffer (502), a linear guide rail (503), a placement plate (504) and a housing positioning block (505). The mounting seat (501), the buffer (502) and the housing positioning block (505) are each provided with two. The linear guide rail (503) is provided on the top surface of the base (1) and is located in the middle of the two reset holes (102). The placement plate (504) is provided on the linear guide rail (503). The two housing positioning blocks (505) are symmetrically fixedly connected to the left and right sides of the top surface of the placement plate (504). The two mounting seats (501) are fixedly connected to the left and right sides of the placement plate (504). The buffer (502) is fixedly connected to the mounting seat (501). The movable end of the buffer (502) facing the placement plate (504) is attached to the left or right side of the placement plate (504).

10. The automatic assembly equipment for plastic shell of water meter according to claim 9, characterized in that: The bottom surface of the plastic shell (6) is provided with a clamping head (601) on both sides, the left and right sides of the metal shell (603) are provided with a protrusion (604), and the top surface of the metal shell (603) is provided with a clamping mouth (602) matching the clamping head (601) on both sides. The plastic shell (6) is inverted on the placement plate (504) and is limited by two shell positioning blocks (505). The metal shell (603) is inverted between two stop blocks (406) and is limited by two V-shaped positioning blocks (405), wherein the protrusion (604) is placed in the concave part of the V-shaped positioning block (405), and the bottom surface of the base (1) is provided with pads (101) at the four corner edges.

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