An assembly for a gauge spring tube assembly with a lower fitting and a housing

Abstract

The utility model discloses an instrument spring tube subassembly and lower joint and shell's assembling device, its characterized in that: including the bottom plate of installation on the workbench, set up on the fixed mode of bottom plate, with the coaxial setting of fixed mode and along the axial sliding pneumatic screwdriver, set up in the fixed mode side for the rotary cylinder of rotating and pressing the instrument shell that places on the fixed mode and the pneumatic workstation that is used for connecting pneumatic screwdriver and rotary cylinder and is used for driving its action, the utility model discloses through the setting of arc limiting strip on fixed mode, make the outer periphery of instrument shell can be closely combined with the inner periphery of arc limiting strip, realize the radial accurate positioning of shell in horizontal direction, simultaneously, two limiting posts extend into instrument shell inside, constitute a limiting space for accommodating spring tube subassembly upper joint, make it be reliably restrained in the assembling process, thereby effectively prevent the rotation or axial displacement of upper joint when screwing lower joint, ensure the accuracy and stability of assembling alignment.

Description

Technical Field

[0001] This utility model relates to the technical field of instrument assembly equipment, specifically to an assembly device for an instrument spring tube assembly, a lower connector, and a housing. Background Technology

[0002] In the instrument manufacturing and assembly process, the assembly of the Bourdon tube assembly with the lower connector and housing is one of the key processes, and its assembly accuracy directly affects the instrument's detection accuracy and service life. Traditional assembly methods largely rely on manual operation, requiring operators to manually position the housing and Bourdon tube assembly, and then use tools to tighten the lower connector to complete the connection. This method has several drawbacks: firstly, manual positioning accuracy is difficult to guarantee, easily leading to problems such as housing misalignment and Bourdon tube assembly misalignment, resulting in increased detection errors in the assembled instrument, and even sealing failure; secondly, manual operation is inefficient, especially in mass production scenarios, making it difficult to meet production capacity requirements, and prolonged repetitive operations increase the operator's workload, easily leading to operational errors due to fatigue. Therefore, an assembly device for the instrument Bourdon tube assembly with the lower connector and housing is proposed. Utility Model Content

[0003] The purpose of this utility model is to solve the above problems by proposing an assembly device for an instrument spring tube assembly, a lower connector, and a housing.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an assembly device for an instrument spring tube assembly, a lower connector, and a housing, characterized in that it includes a base plate mounted on a workbench, a fixed mold mounted on the base plate for adapting and positioning the instrument housing, a pneumatic screwdriver coaxially mounted with the fixed mold and sliding along the axis, a rotary cylinder mounted beside the fixed mold for rotating and pressing the instrument housing placed on the fixed mold, and a pneumatic workstation connecting the pneumatic screwdriver and the rotary cylinder for driving their operation; the fixed mold is provided with an arc-shaped limiting strip defining the position of the instrument housing, and two limiting posts are provided on the side corresponding to the pneumatic screwdriver to limit the displacement of the upper connector of the instrument spring tube assembly. More preferably, the rotary cylinder has a pressure rod at its top.

[0005] More preferably, the end of the pressure rod is provided with a rubber pad.

[0006] More preferably, the base plate is provided with a slide rail for the pneumatic screwdriver to slide.

[0007] More preferably, the pneumatic screwdriver is provided with a slider that cooperates with the slide rail.

[0008] More preferably, the working end of the pneumatic screwdriver is provided with a sleeve that is compatible with the lower connector.

[0009] More preferably, the pneumatic workstation integrates an air pump, and its housing surface is equipped with an air pressure gauge and a switch for controlling the start and stop of the rotary cylinder.

[0010] The beneficial effects of this utility model are as follows: By setting the arc-shaped limiting strip on the fixed mold, the outer peripheral surface of the instrument housing can be tightly fitted with the inner peripheral surface of the arc-shaped limiting strip, so as to achieve precise radial positioning of the housing in the horizontal direction; at the same time, the two limiting posts extend into the interior of the instrument housing to form a limiting space for accommodating the upper connector of the spring tube assembly, so that it is reliably constrained during the assembly process, thereby effectively preventing the upper connector from rotating or axially shifting when tightening the lower connector, and ensuring the accuracy and stability of the assembly alignment;

[0011] The pressure rod is automatically pressed down and fixed by a rotary cylinder, which replaces the traditional manual fixing method. This not only improves assembly efficiency, but also ensures the consistency of the clamping force each time through stable pneumatic power. In addition, the rubber pad at the end of the pressure rod serves as a flexible contact medium with the instrument housing, which can effectively prevent metal parts from directly contacting the product surface and prevent scratches or indentations on the instrument housing during the clamping process, thereby significantly improving the appearance quality of the finished product.

[0012] The sliding pair consisting of the slide rail and the slider provides precise linear movement guidance for the pneumatic screwdriver, ensuring that it can accurately approach or move away from the workpiece along the same path in each assembly operation. This guarantees a high degree of consistency and repeatability of the operation, significantly improves the positioning accuracy of the assembly process, and effectively reduces product damage caused by misalignment, thereby improving the overall assembly qualification rate. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the fixed mold structure of this utility model; Figure 3 This is a schematic diagram of the pneumatic screwdriver structure of this utility model; Figure 4 This is a schematic diagram of the rotary cylinder structure of this utility model.

[0014] Legend: 1. Base plate; 11. Slide rail; 2. Fixed mold; 21. Arc-shaped limit bar; 22. Limit post; 3. Pneumatic screwdriver; 31. Slider; 32. Sleeve; 4. Rotary cylinder; 41. Pressure rod; 42. Rubber pad; 5. Pneumatic workstation; 51. Pressure gauge; 52. Switch. Detailed Implementation

[0015] The following description, in conjunction with the accompanying drawings, further illustrates the assembly device of the instrument spring tube assembly, the lower connector, and the housing according to this utility model.

[0016] It should be noted that all directional indicators such as up, down, left, right, front, back, etc. in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicator will also change accordingly.

[0017] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly; for example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can also mean a mechanical connection, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0018] See Figures 1-4 As shown, an assembly device for an instrument spring tube assembly, a lower connector, and a housing is characterized by comprising: a base plate 1 mounted on a workbench; a fixed mold 2 mounted on the base plate 1 for fitting and positioning the instrument housing; a pneumatic screwdriver 3 coaxially mounted with the fixed mold 2 and sliding along its axis; a rotary cylinder 4 mounted beside the fixed mold 2 for rotating and pressing the instrument housing placed on the fixed mold 2; and a pneumatic workstation 5 connecting the pneumatic screwdriver 3 and the rotary cylinder 4 and driving their operation; the fixed mold 2 is provided with an arc-shaped limiting strip 21 that defines the position of the instrument housing, and two limiting posts 22 are provided on the side corresponding to the pneumatic screwdriver 3 to limit the displacement of the upper connector of the instrument spring tube assembly; the fixed mold 2 is provided with a plurality of mounting holes connected to the base plate 1, and the spring assembly is provided with an upper connector that is threadedly connected to the lower connector. By setting the fixed mold 2, the arc-shaped limiting strip 21 on it is inserted into the instrument housing, so that the inner circumferential surface of the instrument housing is closely fitted with the outer circumferential surface of the arc-shaped limiting strip 21, thereby achieving precise radial positioning of the instrument housing in the horizontal direction; at the same time, the two limiting posts 22 extend into the instrument housing to form a limiting space for accommodating the upper connector of the spring tube assembly, so that it is reliably constrained during the assembly process, thereby effectively preventing the upper connector from rotating or axially shifting when tightening the lower connector, ensuring the accuracy and stability of the assembly alignment.

[0019] See appendix Figure 1 , 4 As shown, the rotary cylinder 4 is provided with a pressure rod 41 at the top; the pressure rod 41 is provided with a rubber pad 42 at the end; during operation, the operator starts the rotary cylinder 4 through the switch 52, which drives the pressure rod 41 to rotate directly above the instrument housing. Then the cylinder piston rod retracts downward, pulling the pressure rod 41 down, so that the rubber pad 42 at the end presses against the instrument housing, thereby firmly fixing the instrument on the fixed mold 2.

[0020] The rotary cylinder 4 drives the pressure rod 41 to automatically complete the pressing and fixing action, replacing the traditional manual fixing method. This not only improves assembly efficiency, but also ensures the consistency of the clamping force each time through stable pneumatic power. In addition, the rubber pad 42 set at the end of the pressure rod 41 serves as a flexible contact medium with the instrument housing, which can effectively prevent metal parts from directly contacting the product surface and prevent scratches or indentations on the instrument housing during the clamping process, thereby significantly improving the appearance quality of the finished product.

[0021] See appendix Figure 1 , 3 As shown, the base plate 1 is provided with a slide rail 11 for the pneumatic screwdriver 3 to slide; the pneumatic screwdriver 3 is provided with a slider 31 that cooperates with the slide rail 11; the slider 31 is fixedly connected to the housing of the pneumatic screwdriver 3 by bolts. The bolt connection method facilitates the quick disassembly of the pneumatic screwdriver 3, providing convenience for its replacement and daily maintenance; the slide rail 11 can be connected to the base plate 1 by welding or bolts, or it can be integrally formed with the base plate 1.

[0022] The sliding pair formed by the slide rail 11 and the slider 31 provides precise linear movement guidance for the pneumatic screwdriver 3, ensuring that it can accurately approach or move away from the workpiece along the same path in each assembly operation. This ensures a high degree of consistency and repeatability of the operation, significantly improves the positioning accuracy of the assembly process, effectively reduces product damage caused by misalignment, and thus improves the overall assembly qualification rate.

[0023] See appendix Figure 1 , 3 As shown, the working end of the pneumatic screwdriver 3 is provided with a sleeve 32 that is compatible with the lower connector; the sleeve 32 has an inner hole that matches the shape of the lower connector; before assembly, the non-threaded end of the lower connector must be inserted into the inner hole of the sleeve 32 to achieve a tight fit and power transmission between the two.

[0024] See appendix Figure 1 As shown, the pneumatic workstation 5 integrates an air pump, and its housing surface is equipped with a pressure gauge 51 and a switch 52 for controlling the start and stop of the rotary cylinder 4. The pneumatic workstation 5 is also equipped with an air outlet port connected to the pneumatic screwdriver 3 and the rotary cylinder 4, which is used to deliver compressed gas to each pneumatic actuator. The pressure gauge 51 is used to display the system output air pressure in real time, thereby continuously monitoring the working air pressure to ensure that the pneumatic screwdriver 3 and the rotary cylinder 4 work under preset and stable pressure conditions, ensuring the consistency and reliability of the assembly process.

[0025] When using this utility model, the operator first performs the pre-installation of the Bourdon tube assembly: put the sealing ring on the upper connector of the Bourdon tube assembly, then insert the upper connector into the corresponding through hole from the bottom of the instrument housing, and put another sealing ring on the upper connector to form a reliable sealing structure at the inlet and outlet of the instrument.

[0026] After completing the above pre-assembly, place the instrument housing with the Bourdon tube assembly installed downwards on the fixed mold 2, so that the arc-shaped limiting strip 21 is inserted into the interior of the instrument housing, and the outer circumferential surface of the arc-shaped limiting strip 21 is not in contact with the inner circumference of the instrument housing. The elastic component is located in the inner circumferential surface of the arc-shaped limiting strip 21, so as to achieve precise positioning of the instrument housing itself. At the same time, the two limiting posts 22 set on the fixed mold 2 also extend into the interior of the instrument housing, so that the upper connector of the Bourdon tube assembly is just locked in the limiting space between the two limiting posts 22, thereby ensuring that the upper connector is accurately aligned with the mating hole of the lower connector to be assembled, and effectively preventing the upper connector from rotating or shifting during the tightening of the lower connector.

[0027] The operator presses switch 52 on the pneumatic workstation 5 to start the rotary cylinder 4. The rotary cylinder 4 first drives the pressure rod 41 to rotate directly above the instrument housing. Then its piston rod retracts downward, pulling the pressure rod 41 down and pressing it so that the rubber pad 42 at the end of the pressure rod 41 is tightly pressed against the surface of the housing, thereby firmly pressing the instrument housing onto the fixed mold 2.

[0028] To enhance the connection's strength, a suitable amount of adhesive can be pre-applied to the threaded portion of the upper connector. Then, the operator places the lower connector at the socket 32 ​​interface of the pneumatic screwdriver 3. Next, the pneumatic screwdriver 3 is pushed, causing it to slide along the slide rail 11 towards the fixed mold 2 via the slider 31. Once the lower connector on the socket 32 ​​is fully aligned with the upper connector of the spring tube assembly, the pneumatic screwdriver 3 is activated. Its rotational torque screws the lower connector into the upper connector, and the adhesive evenly fills the thread gap, further enhancing the connection's strength and sealing. After tightening to the preset torque, the final assembly is complete.

[0029] After assembly, turn off the pneumatic screwdriver 3 and slide it back to its original position along the slide rail 11. The operator presses the switch 52 again, and the piston rod of the rotating cylinder 4 extends upward, driving the pressure rod 41 to lift. Then the pressure rod 41 rotates in the opposite direction to the initial position, away from the fixed mold 2. At this time, the operator can easily take out the assembled watch.

[0030] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. An assembly device for an instrument spring tube assembly, a lower connector, and a housing, characterized in that: The system includes a base plate (1) mounted on a workbench, a fixed mold (2) set on the base plate (1) for fitting and positioning the instrument housing, a pneumatic screwdriver (3) coaxially mounted with the fixed mold (2) and sliding along the axis, a rotary cylinder (4) set beside the fixed mold (2) for rotating and pressing the instrument housing placed on the fixed mold (2), and a pneumatic workstation (5) connecting the pneumatic screwdriver (3) and the rotary cylinder (4) and driving their operation; the fixed mold (2) is provided with an arc-shaped limiting strip (21) that limits the position of the instrument housing, and two limiting posts (22) are provided on the side corresponding to the pneumatic screwdriver (3) to limit the displacement of the connector on the instrument spring tube assembly.

2. The assembly device for an instrument spring tube assembly, a lower connector, and a housing according to claim 1, characterized in that: The rotary cylinder (4) is provided with a pressure rod (41) on its top.

3. The assembly device for an instrument spring tube assembly, a lower connector, and a housing according to claim 2, characterized in that: The end of the pressure rod (41) is provided with a rubber pad (42).

4. The assembly device for an instrument spring tube assembly, a lower connector, and a housing according to claim 1, characterized in that: The base plate (1) is provided with a slide rail (11) for the pneumatic screwdriver (3) to slide.

5. The assembly device for an instrument spring tube assembly, a lower connector, and a housing according to claim 1, characterized in that: The pneumatic screwdriver (3) is provided with a slider (31) that cooperates with the slide rail (11).

6. The assembly device for an instrument spring tube assembly, a lower connector, and a housing according to claim 5, characterized in that: The working end of the pneumatic screwdriver (3) is provided with a sleeve (32) that is compatible with the lower connector.

7. The assembly device for an instrument spring tube assembly, a lower connector, and a housing according to claim 1, characterized in that: The pneumatic workstation (5) has an integrated air pump inside, and its housing surface is equipped with an air pressure gauge (51) and a switch (52) for controlling the start and stop of the rotary cylinder (4).

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