Water meter O-shaped ring inner hole assembling mechanism and method

Abstract

The invention discloses a water meter O-shaped ring inner hole assembling mechanism and method. The water meter O-shaped ring inner hole assembling mechanism comprises a rack assembly, an O-shaped sealing ring feeding assembly, an O-shaped sealing ring clamping assembly, an O-shaped sealing ring assembling assembly, a carrying device clamping assembly and an O-shaped sealing ring pressing assembly, and the rack assembly provides platform supporting for the whole mechanism; the O-shaped sealing ring feeding assembly achieves automatic feeding operation of O-shaped sealing rings. The O-shaped sealing ring clamping assembly realizes the operation that the robot clamps and places the O-shaped sealing ring onto the object carrying platform; the O-shaped sealing ring assembling component is used for realizing the operation of pushing the O-shaped sealing ring into the loading device after the O-shaped sealing ring is extruded The loading device clamping assembly is used for clamping the loading device loaded with the sealing ring to a pressing position by the robot; and the O-shaped sealing ring pressing assembly is used for pushing the sealing ring of the loading device into the inner hole of the water meter. According to the O-shaped sealing ring assembling machine, the O-shaped sealing ring can be fully automatically and mechanically assembled, manual assembling is not used, the assembling consistency and stability of the O-shaped sealing ring are guaranteed, and the assembling qualification rate is increased.

Description

Technical Field

[0001] The invention relates to the field of automated assembly, and in particular to an inner hole assembly mechanism and method for an O-ring of a water meter. Background Art

[0002] As a key device for measuring water consumption, the sealing of the internal structure of the water meter is crucial for accurate measurement and long-term stable operation. In the water meter structure, O-rings, as key sealing components, are widely used in the connections between various components inside the water meter to ensure the sealing performance of the water meter under different pressures, temperatures and media conditions.

[0003] CN111571196 discloses an automatic assembly machine for inner grooves of O-type sealing rings, which can realize an efficient and stable automatic assembly process of O-type sealing rings, effectively improve assembly efficiency and quality, and has the characteristics of simple structure, convenient operation, high degree of automation, etc. However, it requires manual placement of simple parts on the tooling installation end for automatic installation and cannot be used for complex water meter models and fully automatic assembly.

[0004] CN116021279 discloses a method for assembling a sealing retaining ring and an O-ring in a hole, which has the advantages of high assembly efficiency and assembly precision and good sealing effect. However, when the clamping jaws squeeze the sealing ring, there is a risk that the sealing ring will pop out due to elastic force.

[0005] CN113305537 discloses a fully automatic installation tool and method for sealing rings of various specifications, which can realize the assembly and picking operation of sealing rings of various sizes and has high assembly flexibility. However, it can be used for outer ring assembly but not for inner ring assembly.

[0006] Traditional O-ring inner hole assembly methods mostly rely on manual operation, which is not only inefficient, but also difficult to ensure the consistency and accuracy of assembly. During the assembly process, if the operator is inexperienced or careless, it is easy to cause problems such as improper installation of the O-ring, distortion, etc. These problems will directly affect the sealing effect and service life of the water meter. Summary of the invention

[0007] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a water meter O-ring inner hole assembly mechanism, which is suitable for the automatic assembly of the inner hole of the water meter O-ring, realizes an efficient and stable automatic assembly process of the O-ring, and effectively improves the assembly accuracy and efficiency. And provides its assembly method.

[0008] Technical solution: A water meter O-ring inner hole assembly mechanism, comprising a frame assembly, an O-ring feeding assembly, and an O-ring clamping assembly, an O-ring assembly assembly, a carrier clamping assembly, and an O-ring pressing assembly respectively installed on the frame assembly, wherein the O-ring assembly assembly is provided with at least one, the O-ring feeding assembly is arranged on one side of the frame assembly, the water meter conveying line is docked with the other side of the frame assembly, the O-ring clamping assembly, the O-ring assembly assembly, the carrier clamping assembly, and the O-ring pressing assembly are sequentially arranged at intervals along the conveying direction of the water meter conveying line, and the O-ring clamping assembly is close to one side of the O-ring feeding assembly.

[0009] The frame assembly provides a platform support for the entire mechanism; the O-ring feeding assembly realizes the automatic loading operation of the O-ring; the O-ring clamping assembly realizes the operation of the robot clamping the O-ring and placing it on the carrier; the O-ring assembly assembly realizes the operation of pushing the O-ring into the carrier; the carrier clamping assembly realizes the robot clamping the carrier carrying the deformed seal to the pressing position; the O-ring pressing assembly realizes the pushing of the seal of the carrier into the inner hole of the water meter.

[0010] Furthermore, the frame assembly includes a frame, a frame plate, a flow channel plate, and a foot I. The frame plate and the flow channel plate are laid on the frame in sequence to form a supporting surface. A plurality of foot I are provided at intervals at the lower part of the frame. An O-ring clamping assembly, an O-ring assembly assembly, a carrier clamping assembly, and an O-ring pressing assembly are respectively installed on the frame plate. The flow channel plate is used to set up a water meter conveying line.

[0011] There are usually four feet I, which are connected to the ground to provide a support plane for other components, support the rack and provide mobility.

[0012] Furthermore, the O-ring feeding assembly includes a direct vibration guide, a vibration plate, a vibration plate base, and a foot II. The vibration plate base is arranged on one side of the frame assembly, and a plurality of foot IIs are installed at intervals on the bottom thereof. The vibration plate is installed on the vibration plate base, the direct vibration guide is arranged on the frame assembly and connected to the vibration plate, and the O-ring clamping assembly is located on one side of the direct vibration guide.

[0013] The vibration plate conveys and supplies the O-ring in the vibration plate at a uniform speed. The direct vibration guide is an existing equipment, which serves to deliver the O-ring from the vibration plate and provide a fixed position for the O-ring clamping assembly. The foot II supports the vibration plate base and provides a moving function.

[0014] Furthermore, the O-ring clamping assembly includes a robot I, an end adapter plate I, a four-claw cylinder, and a clamp I. The robot I is installed on the frame assembly, the four-claw cylinder is connected to the robot I through the end adapter plate I, and the clamp I is installed on the four-claw cylinder.

[0015] Robot I provides telescopic clamping action, the end adapter plate I provides action conversion, the four-claw cylinder is connected to robot I, moves with robot I, performs clamping and loosening actions, and the clamping claw I clamps the O-ring vibrated out by the vibration plate.

[0016] Furthermore, the O-ring assembly component includes a loading device, a loading centering device, a lifting platform, a lifting base, a lifting spring, a lifting inner column, a lifting cylinder connector, and a lifting cylinder I. The lifting base is installed on the frame assembly, and the lifting platform is installed on the upper part of the lifting base. The lifting base is n-shaped, and a lifting cylinder I is arranged on the inner side thereof. The lifting inner column is connected to the lifting cylinder I through the lifting cylinder connector. The lifting inner column is successively penetrated through the lifting base and the lifting platform from bottom to bottom. A lifting spring is installed on the outer periphery of the upper part of the lifting inner column. A notch for placing the O-ring is arranged on the lifting platform. The loading centering device is installed on the frame assembly. The loading centering device clamps the loading device so that the loading device is placed above the notch. The loading device, the O-ring, and the lifting inner column are coaxially arranged.

[0017] Lifting cylinder I provides upward thrust for lifting the inner column.

[0018] Optimally, the load centering device includes a centering cylinder pad, a load centering cylinder, and a load base. Two load bases are provided, which are respectively arranged on opposite sides of the jacking base and connected to the frame assembly. A load centering cylinder is installed on each load base, and a centering cylinder pad is installed on each load centering cylinder. The two centering cylinder pads are arranged opposite to each other to clamp the load device.

[0019] The load centering cylinder provides clamping force for the load carrier, and the centering cylinder pad fits the external shape of the load carrier.

[0020] Furthermore, the object-carrying device clamping assembly includes a robot II, an end adapter plate II, a cylinder I, and a gripper II. The robot II is installed on the frame assembly, the cylinder I is connected to the robot II through the end adapter plate II, and the gripper II is installed on the cylinder I.

[0021] The gripper II is connected to the cylinder I, the gripping device moves, the cylinder I performs clamping and loosening actions along with the robot II, and the robot II performs a gripping action from the O-ring assembly component.

[0022] Furthermore, the O-ring pressing assembly includes a horizontal conveying module, a pressing module, and a base, the base is installed on the frame assembly, the horizontal conveying module is installed on the base, and the pressing module is installed on the horizontal conveying module.

[0023] The horizontal conveying module is connected to the downward pressing cylinder to provide horizontal position movement, and can perform downward pressing operations on multiple inner holes in a table.

[0024] The best, horizontal conveying module includes a chain belt, a Y-axis connecting plate, an X-axis connecting plate, and a ball screw, the ball screw is installed on the base, the X-axis connecting plate is connected to the ball screw, the Y-axis connecting plate is vertically installed on the X-axis connecting plate, and the chain belt is connected to the X-axis connecting plate;

[0025] The downward pressure module includes a downward pressure cylinder, a downward pressure pad, a downward pressure upper column, a downward pressure spring, and a downward pressure push rod. The downward pressure cylinder is installed on the Y-axis connecting plate. One end of the downward pressure upper column is connected to the downward pressure cylinder through the downward pressure pad, and the other end is connected to the downward pressure push rod through the downward pressure spring. The downward pressure push rod is facing the water meter on the water meter conveying line.

[0026] The downward pressure cylinder provides downward thrust for the downward pressure push rod, and the downward pressure push rod realizes the action of pushing the O-ring of the carrier device into the inner hole of the water meter. The downward pressure spring is connected with the downward pressure push rod and the downward pressure upper column to provide buffering force.

[0027] An assembly method of the above-mentioned water meter O-ring inner hole assembly mechanism comprises the following steps:

[0028] S1: The O-ring feeding assembly discharges the O-rings one by one at a uniform speed;

[0029] S2: The O-ring clamping assembly clamps the O-ring conveyed by the O-ring feeding assembly and transfers it to the O-ring assembly assembly, and the O-ring assembly assembly assembles the O-ring;

[0030] S3: The object carrier clamping assembly clamps the assembled O-ring and moves it to the top of the inner hole of the water meter on the water meter conveying line;

[0031] S4: The O-ring pressing assembly is pressed down at the point to squeeze the O-ring into the inner hole of the water meter, and the object-carrying device clamping assembly puts the loading part back on the O-ring assembly assembly.

[0032] Beneficial effects: Compared with the prior art, the advantages of the present invention are:

[0033] 1. The present invention realizes fully automatic operation from the feeding of the O-ring to the final installation into the inner hole of the water meter without manual intervention, thereby being able to improve the overall assembly accuracy and efficiency.

[0034] 2. The O-ring assembly method of the present invention is not easily affected by the size deviation of the O-ring itself or the deviation of the supply position when the O-ring is clamped onto the stage, and can make the O-ring form a stable deformation with high precision. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 is a schematic diagram of the three-dimensional structure of the invention;

[0036] Figure 2is a structural schematic diagram of a rack assembly;

[0037] Figure 3 It is a structural schematic diagram of the O-ring feeding assembly;

[0038] Figure 4 This is the assembly drawing of the O-ring clamping assembly;

[0039] Figure 5 Assembly drawing for the assembly of the O-ring assembly;

[0040] Figure 6 Exploded view and cross-sectional view of the O-ring assembly assembly;

[0041] Figure 7 An assembly drawing of the clamping assembly of the loading device;

[0042] Figure 8 It is an assembly drawing of the clamping jaws of the object carrying device;

[0043] Fig. 9 This is an exploded view of the O-ring press assembly;

[0044] Fig.10 It is the assembly drawing and cross-sectional view of the water meter with O-ring pressure assembly. DETAILED DESCRIPTION

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0046] A water meter O-ring inner hole assembly mechanism, such as Figures 1 to 10 As shown, it includes a frame assembly 1, an O-ring feeding assembly 2, and an O-ring clamping assembly 3, an O-ring assembly assembly 4, a carrier clamping assembly 5, and an O-ring pressing assembly 6 respectively installed on the frame assembly 1, and the O-ring assembly 4 is provided with at least one.

[0047] The O-ring feeding assembly 2 is arranged on one side of the frame assembly 1 , and the water meter conveying line is connected to the other side of the frame assembly 1 .

[0048] The frame assembly 1 includes a frame 11, a frame plate 12, a flow channel plate 13, and a foot Ⅰ 14. The frame plate 12 and the flow channel plate 13 are laid on the frame 11 in sequence to form a supporting surface. A plurality of foot Ⅰ 14 are provided at intervals at the lower part of the frame 11, and generally four are arranged in a rectangular distribution. An O-ring clamping assembly 3, an O-ring assembly assembly 4, a carrier clamping assembly 5, and an O-ring pressing assembly 6 are respectively installed on the frame plate 12. The flow channel plate 13 is used to set the water meter conveying line, and the O-ring clamping assembly 3 is close to one side of the O-ring feeding assembly 2.

[0049] The O-ring feeding assembly 2 includes a direct vibration guide 21, a vibration plate 22, a vibration plate base 23, and a foot II 24. The vibration plate base 23 is arranged on one side of the frame assembly 1, and a plurality of foot II 24 are installed at intervals on the bottom thereof. The vibration plate 22 is installed on the vibration plate base 23, the direct vibration guide 21 is arranged on the frame assembly 1 and connected to the vibration plate 22, and the O-ring clamping assembly 3 is located on one side of the direct vibration guide 21.

[0050] The O-ring clamping assembly 3 includes a robot Ⅰ31, an end adapter plate Ⅰ32, a four-claw cylinder 33, and a clamp Ⅰ34. The robot Ⅰ31 is installed on the frame assembly 1, the four-claw cylinder 33 is connected to the robot Ⅰ31 through the end adapter plate Ⅰ32, and the clamp Ⅰ34 is installed on the four-claw cylinder 33.

[0051] The O-ring assembly component 4 includes a loading device 41, a loading centering device, a lifting platform 46, a lifting base 47, a lifting spring 48, a lifting inner column 49, a lifting cylinder connector 410, and a lifting cylinder I 411. The loading centering device includes a centering cylinder pad 42, a loading centering cylinder 43, and a loading base 45. The lifting base 47 is installed on the frame component 1, and the lifting platform 46 is installed on the upper part of the lifting base 47. The lifting base 47 is n-shaped, and a lifting cylinder I 411 is arranged on the inner side thereof. The lifting inner column 49 is connected to the lifting cylinder I 411 through the lifting cylinder connector 410. The lifting inner column 49 is sequentially penetrated from bottom to bottom in the lifting base 47 and the lifting platform 46. A lifting spring 48 is installed on the outer periphery of the upper part of the lifting inner column 49, and a notch for placing the O-ring 44 is arranged on the lifting platform 46.

[0052] The load centering device is installed on the frame assembly 1. The load centering device clamps the load device 41 so that the load device 41 is placed above the notch. Two load bases 45 are provided, which are respectively arranged on the opposite sides of the jacking base 47 and connected to the frame assembly 1. A load centering cylinder 43 is respectively installed on each load base 45, and a centering cylinder pad 42 is respectively installed on each load centering cylinder 43. The two centering cylinder pads 42 are relatively arranged to clamp the load device 41. The load device 41, the O-ring 44 and the jacking inner column 49 are coaxially arranged.

[0053] The object-carrying device gripping assembly 5 includes a robot II 51, an end adapter plate II 52, a cylinder I 53, and a clamp II 54. The robot II 51 is installed on the frame assembly 1, the cylinder I 53 is connected to the robot II 51 through the end adapter plate II 52, and the clamp II 54 is installed on the cylinder I 53.

[0054] The O-ring pressing assembly 6 includes a horizontal conveying module, a pressing module, and a base 610. The base 610 is installed on the frame assembly 1, the horizontal conveying module is installed on the base 610, and the pressing module is installed on the horizontal conveying module.

[0055] The horizontal conveying module includes a chain belt 66, a Y-axis connecting plate 67, an X-axis connecting plate 68, and a ball screw 69. The ball screw 69 is installed on the base 610, the X-axis connecting plate 68 is connected to the ball screw 69, the Y-axis connecting plate 67 is vertically installed on the X-axis connecting plate 68, and the chain belt 66 is connected to the X-axis connecting plate 68; the downward pressing module includes a downward pressing cylinder 61, a downward pressing pad 62, a downward pressing upper column 63, a downward pressing spring 64, and a downward pressing push rod 65. The downward pressing cylinder 61 is installed on the Y-axis connecting plate 67, one end of the downward pressing upper column 63 is connected to the downward pressing cylinder 61 through the downward pressing pad 62, and the other end is connected to the downward pressing push rod 65 through the downward pressing spring 64, and the downward pressing push rod 65 is facing the water meter 611 on the water meter conveying line.

[0056] The ball screw 69 carries the push rod 65 to provide precise displacement in the X-axis direction, and the base 610 is connected to the frame plate of the frame assembly to provide support.

[0057] The O-ring feeding component 2 is used to automatically output the O-rings one by one; the O-ring clamping component 3 is used to clamp the O-rings at a fixed point; the O-ring assembly component 4 is used to squeeze the O-rings into the carrier 41; the carrier clamping component 5 is used to clamp the carrier equipped with the O-rings to just above the water meter; the O-ring pressing component 6 is used to push the carrier equipped with the O-rings into the inner hole of the water inlet meter using a push rod.

[0058] In the inner hole assembly mechanism of the O-ring of the water meter, the O-ring feeding assembly flows out the O-rings one by one at a uniform speed, and the water meter flows through the rack assembly conveyor belt. The robot I of the O-ring clamping assembly moves to the vibration plate and opens the clamping claw I to clamp the O-ring. The clamping claw I closes and clamps, and is transferred to the loading platform position. The clamping claw I opens and gently places the O-ring on the O-ring assembly assembly. The load centering device clamps the load device. The jacking device cylinder pushes the pressing push rod upward, and the O-ring is squeezed into the load device. The robot II of the load device clamping assembly goes to the load device to clamp, and the load centering device releases the load device. The robot II moves to the top of the inner hole of the water meter, and the O-ring pressing assembly presses down at the point. The pressing cylinder pushes the pressing push rod to squeeze the O-ring into the inner hole of the water meter. The robot puts the load device back on the loading platform, and the automatic assembly process of the entire O-ring is completed. The automatic assembly mechanism of the inner hole O-ring of the water meter fully automatically assembles the O-ring through an O-ring feeding component, an O-ring clamping component, an O-ring assembly component, a carrier clamping component and an O-ring pressing component without manual assembly, thereby ensuring the assembly consistency of the O-ring and improving the qualified rate of assembly.

[0059] The assembly / working method of the inner hole assembly mechanism mentioned above is as follows: first, the vibration plate of the O-ring feeding assembly causes the O-rings to flow out one by one at a uniform speed, and the water meter flows through the conveyor belt of the frame assembly 1; secondly, the robot I of the O-ring clamping assembly moves to the vibration plate and opens the clamping claw I to clamp the O-ring, and the clamping claw I closes and clamps it, and is transferred to the loading platform position; then the clamping claw I is opened to gently place the O-ring on the lifting platform of the O-ring assembly assembly, the loading centering device clamps the loading device, and the cylinder of the lifting device pushes the pressing push rod upward, and the O-ring is squeezed into the loading device; then the robot II of the loading device clamping assembly goes to the loading device to clamp, the loading centering device releases the loading device, and the robot II moves to the top of the inner hole of the water meter; finally, the O-ring pressing assembly presses down at the point, and the pressing cylinder pushes the pressing push rod to squeeze the O-ring into the inner hole of the water meter, and the robot puts the loading device back on the loading platform.

Claims

1. A water meter O-ring inner hole assembly mechanism, characterized in that: The invention comprises a frame assembly (1), an O-ring feeding assembly (2), and an O-ring clamping assembly (3), an O-ring assembly assembly (4), a carrier clamping assembly (5), and an O-ring pressing assembly (6) respectively mounted on the frame assembly (1). The O-ring assembly assembly (4) is provided with at least one O-ring feeding assembly (2), the O-ring feeding assembly (2) is arranged on one side of the frame assembly (1), and a water meter conveying line is connected to the other side of the frame assembly (1). The O-ring clamping assembly (3), the O-ring assembly assembly (4), the carrier clamping assembly (5), and the O-ring pressing assembly (6) are sequentially arranged at intervals along the conveying direction of the water meter conveying line, and the O-ring clamping assembly (3) is close to one side of the O-ring feeding assembly (2).

2. A water meter O-ring inner hole assembly mechanism according to claim 1, characterized in that: The frame assembly (1) comprises a frame (11), a frame plate (12), a flow channel plate (13), and a foot I (14). The frame plate (12) and the flow channel plate (13) are sequentially laid on the frame (11) to form a support surface. A plurality of foot I (14) are provided at intervals at the bottom of the frame (11). An O-ring clamping assembly (3), an O-ring assembly assembly (4), a carrier clamping assembly (5), and an O-ring pressing assembly (6) are respectively installed on the frame plate (12). The flow channel plate (13) is used to set a water meter transmission line.

3. A water meter O-ring inner hole assembly mechanism according to claim 1, characterized in that: The O-ring feeding assembly (2) comprises a direct vibration flow guide (21), a vibration plate (22), a vibration plate bottom table (23), and a foot II (24); the vibration plate bottom table (23) is arranged on one side of the frame assembly (1), and a plurality of foot IIs (24) are installed at intervals on the bottom of the vibration plate bottom table (23); the vibration plate (22) is installed on the vibration plate bottom table (23); the direct vibration flow guide (21) is arranged on the frame assembly (1) and connected to the vibration plate (22); and the O-ring clamping assembly (3) is located on one side of the direct vibration flow guide (21).

4. A water meter O-ring inner hole assembly mechanism according to claim 1, characterized in that: The O-ring gripping assembly (3) comprises a robot I (31), an end adapter plate I (32), a four-claw cylinder (33), and a clamping claw I (34). The robot I (31) is mounted on a frame assembly (1), the four-claw cylinder (33) is connected to the robot I (31) via the end adapter plate I (32), and the clamping claw I (34) is mounted on the four-claw cylinder (33).

5. A water meter O-ring inner hole assembly mechanism according to claim 1, characterized in that: The O-ring assembly component (4) comprises a loading device (41), a loading centering device, a lifting platform (46), a lifting base (47), a lifting spring (48), a lifting inner column (49), a lifting cylinder connecting piece (410), and a lifting cylinder I (411). The lifting base (47) is mounted on the frame component (1), the lifting platform (46) is mounted on the upper part of the lifting base (47), the lifting base (47) is n-shaped, and a lifting cylinder I (411) is arranged on the inner side thereof. The lifting inner column (49) is connected to the lifting cylinder by the lifting cylinder connecting piece (410). The lifting inner column (49) is connected to the lifting base (47) and the lifting platform (46) from bottom to bottom, and a lifting spring (48) is installed on the outer periphery of the upper part of the lifting inner column (49). The lifting platform (46) is provided with a notch for placing an O-ring (44). The load centering device is installed on the frame assembly (1). The load centering device clamps the load device (41) so that the load device (41) is placed above the notch. The load device (41), the O-ring (44) and the lifting inner column (49) are coaxially arranged.

6. A water meter O-ring inner hole assembly mechanism according to claim 5, characterized in that: The object centering device comprises a centering cylinder pad (42), an object centering cylinder (43), and an object base (45). Two object bases (45) are provided, which are respectively arranged on opposite sides of a lifting base (47) and connected to a frame assembly (1). Each object centering cylinder (43) is respectively installed on each object base (45), and each object centering cylinder (43) is respectively installed on a centering cylinder pad (42). The two centering cylinder pads (42) are arranged opposite to each other to clamp the object carrier (41).

7. A water meter O-ring inner hole assembly mechanism according to claim 1, characterized in that: The object carrier gripping assembly (5) comprises a robot II (51), an end adapter plate II (52), a cylinder I (53), and a gripper II (54). The robot II (51) is mounted on a frame assembly (1), the cylinder I (53) is connected to the robot II (51) via the end adapter plate II (52), and the gripper II (54) is mounted on the cylinder I (53).

8. The water meter O-ring inner hole assembly mechanism according to claim 1, characterized in that: The O-ring pressing assembly (6) comprises a horizontal conveying module, a pressing module, and a base (610). The base (610) is mounted on the frame assembly (1), the horizontal conveying module is mounted on the base (610), and the pressing module is mounted on the horizontal conveying module.

9. A water meter O-ring inner hole assembly mechanism according to claim 8, characterized in that: The horizontal conveying module comprises a chain belt (66), a Y-axis connecting plate (67), an X-axis connecting plate (68), and a ball screw (69), wherein the ball screw (69) is installed on the base (610), the X-axis connecting plate (68) is connected to the ball screw (69), the Y-axis connecting plate (67) is vertically installed on the X-axis connecting plate (68), and the chain belt (66) is connected to the X-axis connecting plate (68); The downward pressure module comprises a downward pressure cylinder (61), a downward pressure pad (62), a downward pressure upper column (63), a downward pressure spring (64), and a downward pressure push rod (65). The downward pressure cylinder (61) is installed on the Y-axis connecting plate (67). One end of the downward pressure upper column (63) is connected to the downward pressure cylinder (61) through the downward pressure pad (62), and the other end is connected to the downward pressure push rod (65) through the downward pressure spring (64). The downward pressure push rod (65) faces the water meter (611) on the water meter transmission line.

10. An assembly method for the inner hole assembly mechanism of an O-ring of a water meter as claimed in any one of claims 1 to 9, characterized in that The following steps are involved: S1: The O-ring feeding assembly (2) discharges the O-rings one by one at a uniform speed; S2: The O-ring clamping assembly (3) clamps the O-ring delivered by the O-ring feeding assembly (2) and transfers it to the O-ring assembling assembly (4), and the O-ring assembling assembly (4) assembles the O-ring; S3: The object carrier clamping assembly (5) clamps the assembled O-ring and moves it to the top of the inner hole of the water meter on the water meter conveying line; S4: The O-ring pressing assembly (6) is pressed down at the aligned point to squeeze the O-ring into the inner hole of the water meter, and the object-carrying device clamping assembly (5) puts the loading part back onto the O-ring assembly assembly (4).

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