An instrument assembly line

Abstract

The application discloses an instrument assembly line, characterized in that comprising: a feeding and discharging station for sequentially taking down the assembled instrument on the assembly seat and placing the instrument shell; a welding station for sequentially placing and welding the illumination brass tube, the fixing stud and the Bourdon tube assembly in the instrument shell on the assembly seat; a calibration station for sequentially placing the dial on the instrument shell on the assembly seat and placing the pointer on the Bourdon tube assembly to align the dial; and a pressing station for sequentially placing and pressing the glass sheet with the gasket and the cover in the instrument shell on the assembly seat to assemble. The application can reduce the difficulty of instrument assembly operation, improve the instrument assembly efficiency and guarantee the assembly quality of the instrument.

Description

Technical Field

[0001] This invention relates to the field of instrument assembly, and more specifically to an instrument assembly line. Background Technology

[0002] Retro car dashboards typically display numerical values ​​using a Bourdon tube combined with a movement. Their structure is relatively simple, mainly consisting of a dashboard housing, mounting bolts, brass tubing, a movement with a Bourdon tube, a dial, and pointers. Currently, due to their internal mechanical structure, retro car dashboards are primarily assembled and calibrated manually. The assembly process involves welding and pressing operations to secure the components within the dashboard housing, requiring each component to be assembled sequentially. This complex assembly work demands a high level of skill from the assemblers. Summary of the Invention

[0003] The purpose of this invention is to provide an instrument assembly line that can reduce the difficulty of instrument assembly operations, improve instrument assembly efficiency, and ensure the assembly quality of instruments.

[0004] The technical solution adopted by the present invention to solve the above problems is:

[0005] An instrument assembly line, characterized in that it comprises:

[0006] The loading and unloading station is used to sequentially remove the assembled instruments from the assembly base and place the instrument housings.

[0007] The welding station is used to sequentially insert and weld the lighting brass tubes, fixing studs and Bourdon tube assemblies inside the instrument housing onto the assembly base.

[0008] The calibration station is used to sequentially position and place the dial inside the instrument housing on the assembly base and to align the pointer on the Bourdon tube assembly with the dial.

[0009] The pressing station is used to assemble the glass sheet with gasket and the cover inside the instrument housing on the assembly base by placing and pressing them in sequence.

[0010] The loading / unloading station, welding station, calibration station, and pressing station are arranged in a circular pattern with equal spacing. The assembly base rotates intermittently around the center of the four stations to transfer the instrument housing between them.

[0011] As a further improvement to the above technical solution, the loading and unloading station includes a transfer seat, a first lifting seat, a first conveying device for intermittently conveying instrument housings, and a conveyor belt for conveying instruments. The transfer seat is intermittently rotatably mounted on the first lifting seat, and the first lifting seat is vertically slidably mounted on the machine body. The transfer seat is provided with three first clamping units for clamping the instrument housings. The three first clamping units are arranged at equal angles around the central axis of the transfer seat. The first clamping units are horizontally slidably mounted on the transfer seat along the radial direction of the transfer seat. The output end of the first conveying device, the input end of the conveyor belt, and the instrument housings on the loading and unloading station are all located on the sliding trajectory of the first clamping units.

[0012] As a further improvement to the above technical solution, the welding station includes a second lifting seat, a heating seat for heating the instrument housing, and three second conveying devices for intermittently conveying the lighting brass tube, the fixing stud, and the Bourdon tube assembly, respectively. The second lifting seat and the heating seat are both vertically slidably mounted on the machine body. Three second clamping units for clamping the lighting brass tube, the fixing stud, and the Bourdon tube assembly are horizontally slidably mounted on the second lifting seat. The three positions of the instrument housing for assembling the lighting brass tube, the fixing stud, and the Bourdon tube assembly, respectively, are located on the sliding trajectory of the three second clamping units at the welding station. The heating seat is located directly below the instrument housing at the welding station.

[0013] As a further improvement to the above technical solution, the mounting base is provided with a through hole for the heating end of the heating base to pass through.

[0014] As a further improvement to the above technical solution, the calibration station includes a third lifting seat, a pressure boosting seat for pressurizing the Bourdon tube assembly, a sliding seat, a first storage box for vertically stacking dials, and a second storage box for vertically stacking pointers. The third lifting seat and the pressure boosting seat are both vertically slidably mounted on the machine body, and the sliding seat is horizontally slidably mounted on the third lifting seat. The sliding seat is provided with two first adsorption units for adsorbing the dial and pointers respectively. The installation positions of the instrument housing on the calibration station and the pointers on the Bourdon tube assembly inside it are respectively located on the sliding tracks of the two first adsorption units. The pressure boosting seat is located directly below the instrument housing on the calibration station.

[0015] As a further improvement to the above technical solution, the pressing station includes a fourth lifting seat, a pressing seat, a third storage box for vertically stacking glass sheets, and a third conveying device for intermittent conveying of caps. The fourth lifting seat and the pressing seat are both vertically slidably mounted on the machine body. The fourth lifting seat is horizontally slidably equipped with a second adsorption unit for adsorbing the glass sheets and a third clamping unit for clamping the caps. The instrument housing on the pressing station is located on the moving trajectory of the pressing seat, the second adsorption unit, and the third clamping unit. The pressing seat is located directly above the instrument housing on the pressing station.

[0016] As a further improvement to the above technical solution, the mounting base is provided with several limiting pieces to prevent the cover from detaching from the instrument housing.

[0017] As a further improvement to the above technical solution, the mounting base is provided with a receiving groove for accommodating the bottom of the instrument housing. Three through holes are provided on the bottom surface of the receiving groove for inserting the bottom ends of the lighting brass tube, the fixing stud and the Bourdon tube assembly respectively. The receiving groove is provided with a clamping unit for clamping the instrument housing.

[0018] As a further improvement to the above technical solution, the top of the receiving groove is flared.

[0019] As a further improvement to the above technical solution, a rotating seat is also included. The rotating seat is intermittently rotated and mounted on the machine body. Assembly seats are provided on the rotating seat at positions corresponding to the loading / unloading station, welding station, calibration station, and pressing station.

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

[0021] (1) By sequentially setting up loading and unloading stations, welding stations, calibration stations and pressing stations, the present invention enables the unified assembly operation of each component in the instrument housing, reduces the difficulty of assembly operation, and enables the overlapping of multiple identical operations, so as to achieve the purpose of completing the assembly operation of multiple components on the instrument housing in a single operation (i.e., fixing multiple components in the instrument housing in a single welding operation), reducing the complexity of instrument assembly operation and improving the efficiency of instrument assembly.

[0022] (2) The present invention fixes the internal components of the instrument housing by welding at the welding station, thereby achieving the effect of fixing multiple components in the instrument housing in a unified manner. This improves the fixing strength while reducing the impact on the subsequent assembly of components, ensuring the accuracy of the subsequent assembly of internal components of the instrument housing and guaranteeing the assembly quality of the instrument.

[0023] (3) The present invention enables the instrument assembly process to be carried out in a production line by the transfer effect of the assembly base on the instrument housing, thereby enabling multiple instruments to be assembled synchronously and sequentially, increasing the number of instruments assembled per unit time and achieving the goal of improving instrument production efficiency. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of an instrument assembly line according to the present invention.

[0025] Figure 2 This is an enlarged schematic diagram of a partial structure of an instrument assembly line according to the present invention.

[0026] Figure 3 yes Figure 2The diagram shows a partial structural cross-sectional view of the assembly base.

[0027] Figure 4 yes Figure 2 The diagram shows the structure of the adjustment component.

[0028] Figure 5 This is an enlarged schematic diagram of a partial structure of an instrument assembly line according to the present invention.

[0029] Figure 6 yes Figure 5 The diagram shows the structure of the second clamping unit.

[0030] Figure 7 yes Figure 5 The diagram shows a schematic cross-sectional view of the welding station.

[0031] Figure 8 This is an enlarged schematic diagram of a partial structure of an instrument assembly line according to the present invention.

[0032] Figure 9 yes Figure 8 The diagram shows the structure of the first adsorption unit.

[0033] Figure 10 yes Figure 8 The diagram shows a partial structural cross-sectional view of the calibration station shown.

[0034] Figure 11 yes Figure 8 The diagram shows a partial cross-sectional view of the calibration station shown.

[0035] Figure 12 This is an enlarged schematic diagram of a partial structure of an instrument assembly line according to the present invention.

[0036] Figure 13 yes Figure 12 The diagram shows a partial structural cross-sectional view of the assembly base.

[0037] Figure 14 yes Figure 12 The diagram shows an enlarged view of the pressing station structure.

[0038] Figure 15 This is a schematic cross-sectional view of the structure of an instrument manufactured by an instrument assembly line according to the present invention.

[0039] Figure 16 yes Figure 15 The diagram shows a top view illustrating the structure of the instrument housing.

[0040] Figure 17 yes Figure 15 The diagram shows a partial enlarged view of the instrument housing.

[0041] The components include: machine body 1, rotating seat 11, assembly seat 12, receiving groove 13, through hole 14, clamping unit 15, clamping seat 16, through hole 17, limiting piece 18, loading / unloading station 2, transfer seat 21, first lifting seat 22, first conveying device 23, conveyor belt 24, first clamping unit 25, welding station 3, second lifting seat 31, heating seat 32, second conveying device 33, second clamping unit 34, heating end 35, calibration station 4, third lifting seat 41, pressure boosting seat 42, sliding seat 43, first storage box 44, second storage box 45, first adsorption unit 46, pressing station 5, and fourth lifting seat. 51, Pressing seat; 52, Third storage box; 53, Third conveying device; 54, Second adsorption unit; 55, Third clamping unit; 56, Inner shell; 6, Dial; 61, Pointer; 62, Bourdon tube assembly; 63, Gear shaft; 631, Connecting end; 632, Glass plate; 64, Fixing bolt; 65, Illuminating brass tube; 66, Positioning post; 67, Positioning hole; 68, Outer shell; 7, Gap space; 71, Cover; 72, Adjustment assembly; 8, Drive seat; 81, Cross slide; 82, Drive wheel; 83, Infrared receiver; 84, Infrared transmitter; 85, Push seat; 91, First mounting seat; 92, Clamping arm; 93, Second mounting seat; 94, Suction cup; 95. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0043] See Figures 1-17 This embodiment discloses an instrument assembly line, including a machine body 1. The machine body 1 has a series of equally spaced, circularly arranged loading / unloading stations 2, welding stations 3, calibration stations 4, and pressing stations 5. A rotating seat 11 is intermittently rotatable on the machine body 1. Assembly seats 12 are provided on the rotating seat 11 at positions corresponding to the loading / unloading stations 2, welding stations 3, calibration stations 4, and pressing stations 5. The loading / unloading stations 2 are used to sequentially remove the assembled instruments from the assembly seats 12. The instrument housing is placed in the following steps: Welding station 3 is used to sequentially insert and weld the lighting brass tube 66, fixing studs, and Bourdon tube assembly 63 inside the instrument housing on the assembly base 12 to the instrument housing; Calibration station 4 is used to sequentially position and place the dial 61 inside the instrument housing on the assembly base 12 and align the pointer 62 on the Bourdon tube assembly 63 with the dial 61; Pressing station 5 is used to sequentially place and press the glass sheet 64 with gaskets and the cover 72 inside the instrument housing on the assembly base 12 for assembly.

[0044] In this embodiment, the rotating seat 11 is intermittently rotated relative to the body 1 by a motor.

[0045] In this embodiment, the instrument assembled on the instrument assembly line comprises an inner shell 6 and an outer shell 7. The cavity of the inner shell 6 houses a dial 61, a pointer 62, and a Bourdon tube assembly 63 for measuring pressure and driving the pointer 62 to rotate. The dial 61 is located between the pointer 62 and the Bourdon tube assembly 63. The gear shaft 631 of the Bourdon tube assembly 63 passes through the dial 61, and the pointer 62 is mounted on the top of the gear shaft 631. The top of the inner shell 6 has a glass plate 64 with a washer. A fixing bolt 65 and an illumination brass tube 66 are inserted from top to bottom onto the bottom surface of the cavity of the inner shell 6. The mating end 632 of the Bourdon tube assembly 63, the bottom end of the fixing bolt 65, and the bottom end of the illumination brass tube 66 all pass through the inner shell 6 and are exposed on the inner shell 6.

[0046] The outer shell 7 is fitted onto the inner shell 6 from bottom to top to form an instrument housing, and there is a gap space 71 between the two for accommodating brazing filler metal. The top of the outer shell 7 is fitted with a cover 72 from top to bottom. The cover 72 is annular. A glass plate 64 is sandwiched between the cover 72 and the inner shell 6. Positioning pins 67 are provided at opposite positions on the Bourdon tube assembly 63, the fixing bolts 65, and the lighting brass tube 66. The inner shell 6 has positioning holes 68 that are adapted to the positioning pins 67 so that the positioning pins 67 can pass through the positioning holes 68 and be located in the gap space 71. The positioning pins 67 are connected to the outer shell 7 by welding.

[0047] In this embodiment, the dial 61 and the inner shell 6, and the cover 72 and the outer shell 7 are connected by a snap-fit ​​structure, and the pointer 62 and the gear shaft 631 are connected by an interference fit.

[0048] See Figures 2-4 The loading / unloading station 2 includes a transfer seat 21, a first lifting seat 22, a first conveying device 23 for intermittent conveying of instrument housings, and a conveyor belt 24 for conveying instruments. The transfer seat 21 is intermittently rotatably mounted on the first lifting seat 22, and the first lifting seat 22 is vertically slidably mounted on the machine body 1. The transfer seat 21 is provided with three first clamping units 25 for clamping the instrument housings. The three first clamping units 25 are arranged at equal angles around the central axis of the transfer seat 21. The first clamping units 25 are horizontally slidably mounted on the transfer seat 21 along the radial direction of the transfer seat 21. The output end of the first conveying device 23, the input end of the conveyor belt 24, and the instrument housings on the loading / unloading station 2 are all located on the sliding trajectory of the first clamping units 25.

[0049] During loading and unloading, the linear movement of the first clamping unit 25 relative to the transfer seat 21 and the clamping effect of the first clamping unit 25, combined with the vertical movement of the first lifting seat 22 relative to the machine body 1, enable the instrument housing located at the output end of the first conveying device 23 and the assembled instrument on the loading and unloading station 2 to be clamped by the corresponding first clamping unit 25. The assembled instrument clamped by the remaining first clamping unit 25 is then transported to the input end of the conveyor belt 24. Subsequently, through the intermittent rotation of the transfer seat 21, the positions of the three first clamping units 25 are changed sequentially, thereby achieving the effect of transferring the instrument housing from the first conveying device 23 to the assembly seat 12 of the loading and unloading station 2 and transferring the assembled instrument on the loading and unloading station 2 to the conveyor belt 24. This achieves the purpose of simultaneous feeding and picking on the assembly seat 12 of the loading and unloading station 2, improving operational efficiency.

[0050] The positioning output of the instrument housing on the first conveying device 23 ensures the consistency of the instrument housing placement on the assembly base 12 when the first clamping unit 25 transfers the instrument housing from the first conveying device 23 to the assembly base 12, thereby facilitating the accurate placement of various components inside the instrument housing.

[0051] In this embodiment, the transfer seat 21 is driven by a motor to rotate intermittently relative to the first lifting seat 22, and the first lifting seat 22 is driven by an electric push rod to move vertically relative to the machine body 1.

[0052] See Figure 3 The mounting base 12 is provided with a receiving groove 13 for accommodating the bottom of the instrument housing. Three through holes 14 are provided on the bottom surface of the receiving groove 13 for inserting the bottom ends of the lighting brass tube 66, the fixing stud and the Bourdon tube assembly 63, so that the lighting brass tube 66, the fixing stud and the Bourdon tube assembly 63 can be completely assembled on the instrument housing, thereby ensuring the effectiveness and fixing quality of subsequent welding. The receiving groove 13 is provided with a clamping unit 15 for clamping the instrument housing.

[0053] The top of the receiving groove 13 is flared, which facilitates the insertion of the bottom of the instrument housing.

[0054] In this embodiment, the clamping unit 15 includes two clamping seats 16 arranged symmetrically on the left and right sides of the receiving groove 13. The clamping seats 16 are slidably disposed on the assembly base 12. The two clamping seats 16 are synchronously moved in opposite directions relative to the assembly base 12 by a dual-output shaft motor, so that the instrument housing can be fixedly placed in the receiving groove 13, ensuring the stability of the instrument housing placement state in the receiving groove 13, reducing the impact on the assembly operation caused by the instrument housing detaching from the receiving groove 13, thereby ensuring the smooth placement of subsequent components in the instrument housing.

[0055] In this embodiment, the three through holes 14 are arranged in a straight line and are in the same diameter direction, so that the transfer trajectories of the lighting brass tube 66, the fixing stud and the Bourdon tube assembly 63 can be separated, ensuring the orderly transfer.

[0056] To ensure the accuracy of the instrument housing placement on the assembly base 12, the loading and unloading station 2 is equipped with an adjustment component 8 (such as...) for adjusting the instrument housing within the receiving groove 13 on the assembly base 12. Figure 4 As shown in the diagram, the adjustment assembly 8 includes a drive seat 81, which is slidably mounted on the body 1 via a cross slide 82. A drive wheel 83 is rotatably mounted on the drive seat 81 to drive the instrument housing to rotate. The drive wheel 83 is rotated relative to the drive seat 81 by a motor. The drive seat 81 and the body 1 are respectively provided with matching infrared receivers 84 and infrared emitters 85 at positions corresponding to the through holes 14 of the three through holes 14 corresponding to the lighting brass tubes 66. Thus, when the drive seat 81 slides relative to the body 1 so that the drive wheel 83 is inside and in contact with the instrument housing, during the process of the drive wheel 83 driving the instrument housing to rotate, when the infrared emitter 85, the infrared receiver 84, and the through hole 14 of the corresponding lighting brass tubes 66 are on the same straight line, the clamping unit 15 clamps the instrument housing, thereby fixing the placement state of the instrument housing on the mounting base 12.

[0057] See Figures 5-7 The welding station 3 includes a second lifting seat 31, a heating seat 32 for heating the instrument housing, and three second conveying devices 33 for intermittently conveying the lighting brass tube 66, the fixing stud, and the Bourdon tube assembly 63, respectively. The second lifting seat 31 and the heating seat 32 are both vertically slidably mounted on the machine body 1. Three second clamping units 34 are horizontally slidably mounted on the second lifting seat 31 for clamping the lighting brass tube 66, the fixing stud, and the Bourdon tube assembly 63, respectively. The three assembly positions of the instrument housing on the welding station 3 for the lighting brass tube 66, the fixing stud, and the Bourdon tube assembly 63 are respectively located on the sliding trajectory of the three second clamping units 34. The heating seat 32 is located directly below the instrument housing on the welding station 3.

[0058] During welding, the linear movement of the second clamping unit 34 relative to the second lifting seat 31 and the clamping effect of the second clamping unit 34, combined with the vertical movement of the second lifting seat 31 relative to the body 1, allow the lighting brass tube 66, the fixing stud, and the Bourdon tube assembly 63 to be sequentially assembled onto the instrument housing. Subsequently, the vertical movement of the heating seat 32 allows the heating seat 32 to heat the instrument housing, thereby melting and filling the brazing filler metal inside the instrument housing between the lighting brass tube 66 and the instrument housing, between the fixing stud and the instrument housing, and between the Bourdon tube assembly 63 and the instrument housing. This achieves the fixation of the lighting brass tube 66, the fixing stud, and the Bourdon tube assembly 63 onto the instrument housing, thus ensuring the assembly quality of the instrument.

[0059] In this embodiment, both the second lifting seat 31 and the heating seat 32 are vertically moved relative to the body 1 by electric push rods.

[0060] See Figure 7 The mounting base 12 has a through hole 17 for the heating end 35 of the heating base 32 to pass through, so that the heating end 35 can contact the instrument housing on the mounting base 12 and be heated, thus ensuring heating efficiency.

[0061] See Figures 8-11 The calibration station 4 includes a third lifting seat 41, a pressure boosting seat 42 for pressurizing the Bourdon tube assembly 63, a sliding seat 43, a first storage box 44 for vertically stacking the dial 61, and a second storage box 45 for vertically stacking the pointer 62. The third lifting seat 41 and the pressure boosting seat 42 are both vertically slidably mounted on the machine body 1, and the sliding seat 43 is horizontally slidably mounted on the third lifting seat 41. The sliding seat 43 is provided with two first adsorption units 46 for adsorbing the dial 61 and the pointer 62, respectively. The installation positions of the instrument housing on the calibration station 4 and the pointer 62 on the Bourdon tube assembly 63 inside it are respectively located on the sliding tracks of the two first adsorption units 46. The pressure boosting seat 42 is located directly below the instrument housing on the calibration station 4.

[0062] During calibration, the linear movement of the sliding seat 43 and the suction effect of the first adsorption unit 46, combined with the vertical movement of the third lifting seat 41 relative to the body 1, allow the dial 61 and pointer 62 to be sequentially positioned and assembled onto the instrument housing. During this process, after the dial 61 is positioned and assembled, the vertical movement of the pressure booster seat 42 causes the pressure booster seat 42 and the Bourdon tube assembly 63 to come into contact and apply a specified pressure until the gear shaft 631 on the Bourdon tube assembly 63 stops rotating. Then, the pointer 62 is assembled onto the gear shaft 631 in a manner that points to a specific value on the dial 61 (this value corresponds to the specified pressure applied by the pressure booster seat 42), ensuring the accuracy of the instrument display.

[0063] In this embodiment, the third lifting seat 41 and the booster seat 42 are both vertically moved relative to the machine body 1 by electric push rods, and the sliding seat 43 is horizontally moved relative to the third lifting seat 41 by a screw motor. The sliding seat 43 is threaded onto the output shaft of the screw motor.

[0064] See Figures 12-14The pressing station 5 includes a fourth lifting seat 51, a pressing seat 52, a third storage box 53 for vertically stacking glass sheets 64, and a third conveying device 54 for intermittently conveying the cap 72. The fourth lifting seat 51 and the pressing seat 52 are both vertically slidably mounted on the machine body 1. The fourth lifting seat 51 is horizontally slidably equipped with a second adsorption unit 55 for adsorbing the glass sheets 64 and a third clamping unit 56 for clamping the cap 72. The instrument housing on the pressing station 5 is located on the moving trajectory of the pressing seat 52, the second adsorption unit 55, and the third clamping unit 56. The pressing seat 52 is located directly above the instrument housing on the pressing station 5.

[0065] During pressing, the second adsorption unit 55 and the third clamping unit 56 move linearly relative to the fourth lifting seat 51, the adsorption effect of the second adsorption unit 55 and the clamping effect of the third clamping unit 56, combined with the vertical movement of the fourth lifting seat 51 relative to the body 1, so that the glass sheet 64 and the cover 72 can be assembled onto the instrument housing in sequence. Then, through the vertical movement of the pressing seat 52, the cover 72 is installed on the instrument housing under pressure, completing the assembly of the instrument. At this time, the glass sheet 64 is clamped between the dial 61 and the cover 72.

[0066] In this embodiment, both the fourth lifting seat 51 and the pressing seat 52 are vertically moved relative to the body 1 by electric push rods.

[0067] The pressing effect of the pressing seat 52 is ensured, and the risk of damage to the component caused by the subsequent pressing of the pressing seat 52 due to the displacement of the cover 72 on the instrument housing is reduced. The mounting seat 12 is provided with a number of limiting pieces 18 to prevent the cover 72 from detaching from the instrument housing.

[0068] In this embodiment, the first conveying device 23, the second conveying device 33, and the third conveying device 54 are all vibratory feeders, which ensures the consistency of the component output state, thereby facilitating the subsequent clamping unit to transfer the component directly into the instrument housing and improve the process and accuracy of the operation.

[0069] In this embodiment, a pusher seat 91 is vertically slidably arranged inside the first storage box 44, the second storage box 45, and the third storage box 53. The pusher seat 91 inside the first storage box 44, the second storage box 45, and the third storage box 53 can be vertically moved by an electric push rod, so that the dial 61 in the first storage box 44, the pointer 62 in the second storage box 45, and the glass plate 64 in the third storage box 53 can be lifted by the pusher seat 91, thereby facilitating the subsequent adsorption unit to extract the corresponding components inside the storage box.

[0070] In this embodiment, the first clamping unit 25, the second clamping unit 34, and the third clamping unit 56 each include a first mounting base 92 and two clamping arms 93. The first mounting base 92 of the first clamping unit 25 is slidably disposed on the first lifting base 22, the first mounting base 92 of the second clamping unit 34 is slidably disposed on the second lifting base 31, and the first mounting base 92 of the third clamping unit 56 is slidably disposed on the fourth lifting base 51. The first lifting base 22, the second lifting base 31, and the fourth lifting base 51 are all driven by a screw motor to slide the first mounting base 92 horizontally in a straight line. The first mounting base 92 is threaded onto the output shaft of the screw motor. The clamping arms 93 are slidably disposed on the first mounting base 92. The two clamping arms 93 are synchronously reversed relative to the first mounting base 92 by a dual-output shaft motor, thereby realizing the switching between clamping and releasing the component by the two clamping arms 93.

[0071] In this embodiment, both the first adsorption unit 46 and the second adsorption unit 55 include a second mounting base 94 and a suction cup 95. The suction cup 95 is mounted on the second mounting base 94. The suction cup 95 uses an air pump to achieve negative pressure adsorption on the component, which facilitates the transfer of small components and sheet-like components. The second mounting base 94 of the first adsorption unit 46 is fixed on the sliding base 43. The second mounting base 94 of the second adsorption unit 55 is slidably disposed on the fourth lifting base 51. The fourth lifting base 51 is driven by a screw motor to move the second mounting base 94 horizontally in a linear manner. The second mounting base 94 is threaded onto the output shaft of the screw motor.

[0072] The above description is merely illustrative of the invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined by the claims, all of which should fall within the protection scope of this invention.

Claims

1. An instrument assembly line, characterized in that, include: The loading and unloading station is used to sequentially remove the assembled instruments from the assembly base and place the instrument housings. The welding station is used to sequentially insert and weld the lighting brass tubes, fixing studs and Bourdon tube assemblies inside the instrument housing onto the assembly base. The calibration station is used to sequentially position and place the dial inside the instrument housing on the assembly base and to align the pointer on the Bourdon tube assembly with the dial. The pressing station is used to assemble the glass sheet with gasket and the cover inside the instrument housing on the assembly base by placing and pressing them in sequence. The loading / unloading station, welding station, calibration station, and pressing station are arranged in a circular pattern with equal spacing, and the assembly base realizes the transfer of the instrument housing between the loading / unloading station, welding station, calibration station, and pressing station by intermittently rotating around the center of the four stations. The welding station includes a second lifting seat, a heating seat for heating the instrument housing, and three second conveying devices for intermittently conveying the lighting brass tube, the fixing stud, and the Bourdon tube assembly, respectively. The second lifting seat and the heating seat are both vertically slidably mounted on the machine body. Three second clamping units for clamping the lighting brass tube, the fixing stud, and the Bourdon tube assembly are horizontally slidably mounted on the second lifting seat. The three positions of the instrument housing for assembling the lighting brass tube, the fixing stud, and the Bourdon tube assembly, respectively, are located on the sliding tracks of the three second clamping units at the welding station. The heating seat is located directly below the instrument housing at the welding station.

2. The instrument assembly line according to claim 1, characterized in that: The loading and unloading station includes a transfer seat, a first lifting seat, a first conveying device for intermittently conveying instrument housings, and a conveyor belt for conveying instruments. The transfer seat is intermittently rotatably mounted on the first lifting seat, and the first lifting seat is vertically slidably mounted on the machine body. The transfer seat is provided with three first clamping units for clamping the instrument housings. The three first clamping units are arranged at equal angles around the central axis of the transfer seat. The first clamping units are horizontally slidably mounted on the transfer seat along the radial direction of the transfer seat. The output end of the first conveying device, the input end of the conveyor belt, and the instrument housings on the loading and unloading station are all located on the sliding trajectory of the first clamping units.

3. The instrument assembly line according to claim 1, characterized in that: The mounting base has a through hole for the heating end of the heating base to pass through.

4. The instrument assembly line according to claim 1, characterized in that: The calibration station includes a third lifting seat, a pressure boosting seat for pressurizing the Bourdon tube assembly, a sliding seat, a first storage box for vertically stacking dials, and a second storage box for vertically stacking pointers. The third lifting seat and the pressure boosting seat are both vertically slidably mounted on the machine body, and the sliding seat is horizontally slidably mounted on the third lifting seat. The sliding seat is equipped with two first adsorption units for adsorbing the dial and pointers, respectively. The instrument housing on the calibration station and the mounting positions of the pointers on the Bourdon tube assembly inside it are located on the sliding tracks of the two first adsorption units, respectively. The pressure boosting seat is located directly below the instrument housing on the calibration station.

5. The instrument assembly line according to claim 1, characterized in that: The pressing station includes a fourth lifting seat, a pressing seat, a third storage box for vertically stacking glass sheets, and a third conveying device for intermittent capping. The fourth lifting seat and the pressing seat are both vertically slidably mounted on the machine body. The fourth lifting seat has a second adsorption unit for adsorbing the glass sheets and a third clamping unit for clamping the caps. The instrument housing on the pressing station is located on the moving trajectory of the pressing seat, the second adsorption unit, and the third clamping unit. The pressing seat is located directly above the instrument housing on the pressing station.

6. The instrument assembly line according to claim 5, characterized in that: The mounting base is provided with several limiting plates to prevent the cover from detaching from the instrument housing.

7. The instrument assembly line according to claim 1, characterized in that: The mounting base has a receiving groove for accommodating the bottom of the instrument housing. Three through holes are provided on the bottom surface of the receiving groove for inserting the bottom ends of the lighting brass tube, the fixing stud and the Bourdon tube assembly. The receiving groove is provided with a clamping unit for clamping the instrument housing.

8. The instrument assembly line according to claim 7, characterized in that: The top of the receiving groove is flared.

9. The instrument assembly line according to claim 1, characterized in that: It also includes a rotating seat, which is intermittently rotated on the machine body. The rotating seat is equipped with assembly seats at positions corresponding to the loading and unloading station, welding station, calibration station and pressing station.

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