Adjusting seat tightening tool and method

Abstract

The application discloses a kind of adjusting seat tightening tool and method, including main seat, adjusting seat installation unit;Adjusting seat installation unit includes: adjusting seat positioning block, adjusting seat positioning block upper end has positioning groove;Tightening rotary shaft, the upper end of tightening rotary shaft is fixedly connected adjusting seat positioning block, the central axis of tightening rotary shaft coincides with the tightening central axis of adjusting seat;Tightening drive assembly, tightening drive assembly is transmission with tightening rotary shaft to drive tightening rotary shaft rotation;Lifting movable frame and lifting servo drive component, lifting movable frame is set on main seat and moves up and down, the lower end of tightening rotary shaft is horizontally rotatably connected lifting movable frame, lifting servo drive component drives lifting movable frame to move up and down, while tightening rotary shaft and tightening drive assembly relative sliding fit.The scheme of the application is to solve the efficiency of installation and the control force of product quality.

Description

Technical Field

[0001] This invention relates to the field of automated tooling technology, specifically, to a tooling for screwing an adjusting seat into the valve body during the assembly process of an automotive air conditioning expansion valve. Background Technology

[0002] Referring to a thermal expansion valve for automotive air conditioning disclosed in CN102102924A, as per its patent appendix... Figure 1 As shown, it is common knowledge that an adjusting seat needs to be screwed into the bottom of the valve body. However, the installation of the adjusting seat for the air conditioning expansion valve has always been a challenge. Traditional adjusting seat assembly methods are inefficient, lack monitoring during the process, and defective products can easily slip into the product mix undetected, resulting in a defect rate as high as 2%. Therefore, it is necessary to address the issues of installation efficiency and the control over product quality. Summary of the Invention

[0003] The purpose of this invention is to provide an adjusting seat tightening fixture and method to solve the problems of installation efficiency and control over product quality.

[0004] The objective of this invention is achieved as follows: an adjusting seat tightening fixture, comprising a main seat and an adjusting seat mounting unit;

[0005] The adjusting seat mounting unit includes:

[0006] An adjusting seat positioning block, wherein the upper end of the adjusting seat positioning block has an upward-facing positioning groove for inserting and positioning the adjusting seat;

[0007] A vertically extending tightening rotating shaft, the upper end of which is fixedly connected to an adjusting seat positioning block, and the central axis of the tightening rotating shaft coincides with the tightening central axis of the adjusting seat;

[0008] A tightening drive assembly is configured to drive a tightening rotary shaft to rotate. A rotary support block is fixedly connected to the main seat, and the tightening rotary shaft moves through the rotary support block.

[0009] The lifting frame and lifting servo drive component are provided. The lifting frame is movably mounted on the main seat. The lower end of the tightening rotating shaft is horizontally rotatably connected to the lifting frame. The lifting servo drive component is mounted on the main seat and drives the lifting frame to move up and down. At the same time, the tightening rotating shaft and the tightening drive component slide relative to each other.

[0010] The valve body positioning unit comprises a horizontal rotating arm and a horizontal rotating driving part, the middle part of the horizontal rotating arm is connected to the main seat in a horizontal rotating manner, and valve body position locking assemblies are installed at both ends of the horizontal rotating arm for locking the valve body; the horizontal rotating arm reciprocally rotates a preset angle under the driving of the horizontal rotating driving part, so that both ends of the horizontal rotating arm correspond to the feeding position of the valve body and the position where the valve body is assembled with the adjusting seat respectively.

[0011] As another aspect of the application, an adjusting seat tightening method using the adjusting seat tightening tool is provided, and at least comprises the following steps:

[0012] The feeding step S1:

[0013] S11, locking the valve body at one end of the horizontal rotating arm by using the valve body position locking assembly, and driving the horizontal rotating arm to horizontally rotate a preset angle by using the horizontal rotating driving part, so as to transfer the valve body to the installation station, and meanwhile, the other end of the horizontal rotating arm is in the feeding position;

[0014] S12, inserting the adjusting seat into the adjusting seat positioning block, and the adjusting seat upwardly faces the mounting hole of the valve body;

[0015] The installation step S2:

[0016] S21, driving the lifting movable frame and the adjusting seat to ascend by using the lifting servo driving part, so that the adjusting seat is inserted into the mounting hole of the valve body in an upward direction;

[0017] S22, driving the tightening rotating shaft to rotate by using the tightening driving assembly, so as to drive the adjusting seat positioning block and the adjusting seat to rotate around the axis, and combining the axial force of driving the adjusting seat to be inserted into the mounting hole of the valve body in an upward direction, so that the adjusting seat is screwed into the mounting hole of the valve body in a threaded manner;

[0018] S23, the adjusting seat positioning block is provided with an angle monitoring device, a speed monitoring device and a position detection device below, and whether the adjusting seat is tightened into the mounting hole of the valve body is judged by the angle, speed and position of the tightening.

[0019] The application has the following beneficial effects:

[0020] 1. The tightening installation operation of the adjusting seat can be automatically realized, the tightening efficiency and assembly quality can be greatly improved, the defective rate and production cost can be reduced;

[0021] 2. The relative position between the adjusting seat and the valve body can be well controlled, the tightening action of the adjusting seat is decomposed into axial movement and rotation, and the axial movement and rotation are completed by the cooperation of the corresponding components, so that the adjusting seat is smoothly screwed into the mounting hole of the valve body in an upward direction. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1is a first perspective view of the present application.

[0023] Figure 2 is a second perspective view of the present application.

[0024] Figure 3 is a schematic view of the arrangement of the two gripper cylinders.

[0025] Figure 4 is a lateral arrangement view of the present application.

[0026] Figure 5 is a schematic view of the lifting carriage and the adjusting seat positioning block.

[0027] Figure 6 is a schematic view of the flat swivel drive component of the flat swivel arm. DETAILED DESCRIPTION

[0028] The present application is further illustrated below in conjunction with the accompanying Figures 1-6 and specific embodiments.

[0029] As shown in Figure 1 , 2 , a kind of adjusting seat tightening tool, for the expansion valve adjusting seat 30 from below the installation hole of valve body 6 is inserted, it includes main seat 31, adjusting seat installation unit.

[0030] The above-mentioned adjusting seat installation unit includes:

[0031] Adjusting seat positioning block 18, adjusting seat positioning block 18 upper end has the positioning slot for inserting and positioning adjusting seat 30 with opening upwards;

[0032] Vertically extending tightening rotation shaft 19, the upper end of the tightening rotation shaft 19 is fixedly connected with adjusting seat positioning block 18, and the central axis of the tightening rotation shaft 19 coincides with the tightening central axis of the adjusting seat 30;

[0033] Tightening drive assembly, the tightening drive assembly includes tightening servo motor 22, tightening synchronous belt 21, output side pulley 20, drive side pulley, the tightening synchronous belt 21 is matched with the output side pulley 20 and the drive side pulley, the tightening servo motor 22 is fixedly installed on the main seat 31, and the output main shaft of the tightening servo motor 22 is sleeved with the drive side pulley, the main seat 31 is fixedly connected with the rotating support block 23, the output side pulley 20 is rotatably connected with the rotating support block 23, the tightening rotation shaft 19 movably passes through the rotating support block 23, the tightening rotation shaft 19 movably passes through the output side pulley 20, and the output side pulley 20 rotates together with the tightening rotation shaft 19 when the output side pulley 20 rotates;

[0034] The lifting movable frame is movably arranged on the main base 31, and the lower end of the tightening rotating shaft 19 is horizontally connected to the lifting movable frame. The lifting servo driving part is installed on the main base 31 and drives the lifting movable frame to move up and down, and the tightening rotating shaft 19 is slidably connected to the tightening driving assembly;

[0035] The valve body positioning unit comprises a horizontal rotating arm 4 and a horizontal rotating driving part. The middle part of the horizontal rotating arm 4 is horizontally rotatably connected to the main base 31. The two ends of the horizontal rotating arm 4 are both provided with a valve body position locking assembly for locking the valve body 6. The horizontal rotating arm 4 reciprocally rotates by a preset angle under the driving of the horizontal rotating driving part, so that the two ends of the horizontal rotating arm 4 correspond to the feeding position of the valve body 6 and the position where the valve body 6 is assembled with the adjusting base 30, respectively.

[0036] The adjusting base rotating step motor 16 is provided with an output shaft upwardly and fixedly connected with an adjusting positioning base 17 (provided with a positioning slot for positioning the adjusting base 30) for positioning the plug-in adjusting base 30, so as to drive the adjusting positioning base 17 and the adjusting base 30 to horizontally rotate by a certain angle.

[0037] As shown in Figure 3 The tool further comprises a side pulling moving base 12 horizontally slidably connected to the main base 31. The side pulling moving base 12 is provided with side pulling cylinders 11 parallel to each other. The cylinders of the side pulling cylinders 11 are installed on the fixed plate of the main base 31, and the piston rods of the side pulling cylinders 11 are connected to the side pulling moving base 12. A pair of horizontally arranged and parallel moving and stretching cylinders 13 are installed on the side pulling moving base 12. The axes of the moving and stretching cylinders 13 are perpendicular to the sliding direction of the side pulling moving base 12. The movable part of the moving and stretching cylinders 13 is provided with an adjusting base moving and lifting cylinder 14 for lifting. The movable part of the adjusting base moving and lifting cylinder 14 is provided with a clamping jaw cylinder 15 for horizontally clamping the adjusting base 30 of the expansion valve to transport the adjusting base 30.

[0038] The valve body position locking assembly comprises:

[0039] The valve body positioning base 5 is provided with a positioning hole 5a penetrating upward and downward on the upper side. The valve body 6 is movably plugged into the positioning hole 5a and matches the positioning hole 5a. The two ends of the horizontal rotating arm 4 are both provided with penetrating holes penetrating upward and downward and smaller than the positioning hole 5a. The end part of the horizontal rotating arm 4 supports and fixedly connects the valve body positioning base 5. The positioning hole 5a communicates with the penetrating hole of the horizontal rotating arm 4, so as to facilitate the plug-in and threaded connection of the adjusting base 30 to the lower threaded hole of the valve body 6 from the lower side.

[0040] The valve body pressing block 7 and the valve body fixing cylinder 9, the cylinder barrel of the valve body fixing cylinder 9 is fixed on the horizontal rotating arm 4, the piston rod of the valve body fixing cylinder 9 extends upwards and is fixedly connected with a horizontally extending connecting rod 8 at the end thereof, the valve body pressing block 7 is fixedly connected with the connecting rod 8, the valve body pressing block 7 is directly above the valve body 6 and presses the valve body 6 in the positioning hole 5a under the driving of the valve body fixing cylinder 9.

[0041] In addition, in order to control the lifting position of the lifting movable frame and control the height position of the adjusting seat 30, a plurality of height control sensors 29 are arranged on the lifting movable frame.

[0042] As shown in Figure 4 , 5 , the lifting movable frame comprises an upper lifting sliding block 24, a spring 25, a bottom lifting sliding block 26, the bottom of the tightening rotating shaft 19 is horizontally rotatably inserted into the upper lifting sliding block 24, the upper lifting sliding block 24 is independently above the bottom lifting sliding block 26, the upper lifting sliding block 24 is elastically connected with the bottom lifting sliding block 26 through the spring 25, the axis of the spring 25 is parallel to the upper tightening rotating shaft 19 and the adjusting seat 30, the upper lifting sliding block 24 and the bottom lifting sliding block 26 are connected with the main seat 31 in a lifting sliding manner.

[0043] The lifting servo driving part comprises a lifting servo motor 28, a lifting synchronous belt 27 and a pair of synchronous pulleys rotatably connected with the main seat 31, the lifting servo motor 28 is installed on the main seat 31, the lifting synchronous belt 27 is matched with the pair of synchronous pulleys, the lifting servo motor 28 is rotatably connected with one of the synchronous pulleys, and the bottom lifting sliding block 26 is fixedly connected with the lifting synchronous belt 27.

[0044] As shown in Figure 6 , the horizontal rotating driving part comprises a rotating driving cylinder 1, a rotating driving rack 2 and a rotating driving gear 3, the cylinder barrel of the rotating driving cylinder 1 is fixedly installed on the main seat 31, the rotating driving gear 3 is coaxially sleeved with the rotating shaft of the horizontal rotating arm 4, the rotating driving rack 2 is fixedly connected with the piston rod of the rotating driving cylinder 1, and the rotating driving rack 2 is engaged with the rotating driving gear 3 to drive the horizontal rotating arm 4 to rotate horizontally.

[0045] In combination Figures 1-6 , the embodiment proposes a tightening method of the adjusting seat using the above-mentioned adjusting seat tightening tool, which comprises the following steps:

[0046] When working, the adjusting seat rotates to a fixed angle by the stepping motor 16, and then the adjusting seat 30 is clamped at the predetermined angle by one of the clamping cylinders 15, the side pulling cylinder 11 pushes the side pulling moving seat 12, the clamping cylinder 15 and the adjusting seat 30 are pushed to the installation station, that is, the adjusting seat 3 is transferred to the installation station, and the adjusting seat moving lifting cylinder 14 drives the clamping cylinder 15 and the adjusting seat 30 to adjust the height position during the transfer process.

[0047] Meanwhile, the valve body 6 is inserted into the positioning hole 5a of the valve body positioning seat 5, the valve body 6 partially protrudes from the upper side of the valve body positioning seat 5, the valve body positioning cylinder 10 is used to rotate and adjust the valve body 6 and the valve body positioning seat 5 to the concentric state (the valve body positioning seat 5 is rotationally connected with the horizontal rotating arm 4, and the valve body positioning cylinder 10 drives the valve body positioning seat 5 to horizontally rotate, which is an optional process during the specific operation, that is, a preferred way to adjust the position of the valve body 6), then the piston rod of the valve body fixing cylinder 9 is retracted to drive the valve body pressing block 7 to press down and lock the valve body 6, and then the rotary drive cylinder 1 drives the rotary drive rack 2 to horizontally move, drives the rotary drive gear 3 and the horizontal rotating arm 4 to horizontally rotate, so that the position of the valve body 6 is switched to the upper side of the adjusting seat positioning block 18 and the adjusting seat 30, so that the adjusting seat 30 is upwardly opposite to the mounting hole of the valve body 6.

[0048] After the adjusting seat 30 is upwardly opposite to the mounting hole of the valve body 6, the lifting servo motor 28 drives the synchronous belt mechanism to operate, the movement of the lifting synchronous belt 27 drives the bottom lifting slider 26 to slide upwardly, and at the same time, the upper lifting slider 24 and the tightening rotating shaft 19 also slide upwardly, the tightening rotating shaft 19 is axially movably connected with the output side pulley 20 and the rotating support block 23, so that the adjusting seat positioning block 18 and the adjusting seat 30 are lifted upwardly together with the tightening rotating shaft 19, so as to insert the adjusting seat 30 upwardly into the mounting hole of the valve body 6, and at the same time, the tightening servo motor 22 drives the output side pulley 20 to horizontally rotate through the tightening synchronous belt 21, the output side pulley 20 drives the tightening rotating shaft 19 to horizontally rotate to transmit the torque through the axial movably connected relationship between the tightening rotating shaft 19 and the output side pulley 20, drives the adjusting seat 30 to rotate, and combines the axial force of the adjusting seat 30 inserted upwardly into the mounting hole of the valve body 6, so that the adjusting seat 30 is inserted into the mounting hole of the valve body 6 in the threaded connection mode, the angle monitoring device, the speed monitoring device and the position detecting device are arranged below the adjusting seat positioning block 18, and the tightening angle, the speed and the position are used to determine whether the adjusting seat 30 is tightened in the mounting hole of the valve body 6.

[0049] The adjusting seat 30, the adjusting seat positioning block 18 (cylindrical), the output side pulley 20 and the tightening rotating shaft 19 are coaxial, and are coaxial with the mounting hole of the valve body 6, so that the adjusting seat 30 is smoothly tightened in the mounting hole of the valve body 6.

[0050] Since the ascending and descending slider 24 is elastically connected with the bottom ascending and descending slider 26 by the spring 25, when the adjusting seat 30 is screwed into the mounting hole of the valve body 6, it is necessary to control the force of the adjusting seat 30 screwed in by using the elastic expansion characteristics of the spring 25 under the influence of the axial force.

[0051] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all respects as illustrative and not restrictive, the scope of the present application being defined by the appended claims rather than the above description, and it is therefore intended that all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced by the application. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0052] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification need necessarily include every independent technical feature mentioned in the specification, and that reference to a particular embodiment or inventive concept does not preclude the application of another embodiment or the inventive concept to a process or device that is substantially similar save for the insignificant differences. It is intended that only those limitations that are supported by the patent claims define the scope of the application.

Claims

1. An adjustment seat tightening tool characterized by, The main seat (31) is provided with an adjusting seat installation unit; The adjusting seat installation unit comprises: An adjusting seat positioning block (18) having an opening upwardly directed positioning groove at the upper end for inserting and positioning the adjusting seat (30); A vertically extending tightening rotating shaft (19) having a fixed connection with the adjusting seat positioning block (18) at the upper end, and the central axis of the tightening rotating shaft (19) coincides with the tightening central axis of the adjusting seat (30); A tightening drive assembly in transmission cooperation with the tightening rotating shaft (19) to drive the tightening rotating shaft (19) to rotate, and the main seat (31) is fixedly connected with a rotating support block (23), and the tightening rotating shaft (19) passes through the rotating support block (23) movably; A lifting movable frame and a lifting servo drive component, the lifting movable frame is movably arranged on the main seat (31), the lower end of the tightening rotating shaft (19) is movably connected with the lifting movable frame, and the lifting servo drive component is installed on the main seat (31) and drives the lifting movable frame to move up and down, and the tightening rotating shaft (19) is in sliding cooperation with the tightening drive assembly; A valve body positioning unit comprising a horizontal rotating arm (4) and a horizontal rotating drive component, the middle part of the horizontal rotating arm (4) is movably connected with the main seat (31), and the two ends of the horizontal rotating arm (4) are provided with valve body position locking assemblies for locking the valve body (6), and the horizontal rotating arm (4) rotates back and forth by a predetermined angle under the drive of the horizontal rotating drive component, so that the two ends of the horizontal rotating arm (4) correspond to the feeding position of the valve body (6) and the position of the valve body (6) assembled with the adjusting seat (30) respectively; An adjusting seat rotating step motor (16), the output shaft of the adjusting seat rotating step motor (16) is upwardly directed and fixedly connected with an adjusting positioning seat (17) for positioning and inserting the adjusting seat (30), so as to drive the adjusting positioning seat (17) and the adjusting seat (30) to rotate horizontally by a certain angle.

2. The tool of claim 1, wherein: Further comprising a side pulling moving seat (12) movably connected with the main seat (31), the side pulling moving seat (12) is provided with side pulling cylinders (11) parallel to each other, the cylinder barrel of the side pulling cylinder (11) is installed on the fixed plate of the main seat (31), and the piston rod of the side pulling cylinder (11) is connected with the side pulling moving seat (12); A pair of horizontally arranged and parallel moving and stretching cylinders (13) are installed on the side pulling moving seat (12), and the axis of the moving and stretching cylinder (13) is perpendicular to the sliding direction of the side pulling moving seat (12); The movable part of the moving and stretching cylinder (13) is provided with an adjusting seat moving and lifting cylinder (14) for lifting, and the movable part of the adjusting seat moving and lifting cylinder (14) is provided with a gripper cylinder (15), which horizontally clamps the adjusting seat (30) of the expansion valve to transport the adjusting seat (30) during use.

3. The tool of claim 1, wherein: The valve body position locking assembly comprises: Valve body positioning seat (5), the upper side of the valve body positioning seat (5) is provided with a positioning hole (5a) penetrating up and down, the valve body (6) is movably inserted into the positioning hole (5a) and matched with the positioning hole (5a), both ends of the flat rotating arm (4) are provided with a through hole penetrating up and down, which is smaller than the positioning hole (5a), the end of the flat rotating arm (4) supports and fixedly connects the valve body positioning seat (5), the positioning hole (5a) is communicated with the through hole of the flat rotating arm (4), so that the adjusting seat (30) is inserted from below and threadedly connected with the lower screw hole of the valve body (6); Valve body pressing block (7) and valve body fixing cylinder (9) thereof, the cylinder of the valve body fixing cylinder (9) is fixed on the flat rotating arm (4), the piston rod of the valve body fixing cylinder (9) extends upward and is fixedly connected with a horizontally extending connecting rod (8) at the end thereof, the valve body pressing block (7) is fixedly connected with the connecting rod (8), the valve body pressing block (7) is directly above the valve body (6) and presses the valve body (6) in the positioning hole (5a) under the driving of the valve body fixing cylinder (9).

4. The tool of claim 1, wherein: The lifting movable frame is provided with a plurality of height control sensors (29), and all the height control sensors (29) are arranged along the lifting movable track of the lifting movable frame.

5. An adjustment seat tightening tool according to claim 4, wherein The tightening driving assembly comprises a tightening servo motor (22), a tightening synchronous belt (21), an output side pulley (20) and a driving side pulley, the tightening synchronous belt (21) is matched with the output side pulley (20) and the driving side pulley, the tightening servo motor (22) is fixedly installed on the main seat (31), the output main shaft of the tightening servo motor (22) is sleeved with the driving side pulley, the output side pulley (20) is rotatably connected with a rotating support block (23), the tightening rotating shaft (19) movably penetrates through the rotating support block (23), the tightening rotating shaft (19) coaxially penetrates through the output side pulley (20) in a lifting movable manner, and the output side pulley (20) rotates together with the tightening rotating shaft (19) when the output side pulley (20) rotates. The lifting movable frame comprises an upper lifting sliding block (24), a spring (25) and a bottom lifting sliding block (26), the bottom of the tightening rotating shaft (19) is horizontally rotatably inserted into the upper lifting sliding block (24), the upper lifting sliding block (24) is independently above the bottom lifting sliding block (26) and is elastically connected with the bottom lifting sliding block (26) through the spring (25), and the upper lifting sliding block (24) and the bottom lifting sliding block (26) are movably connected with the main seat (31).

6. An adjustment seat tightening tool according to claim 5, wherein The lifting servo driving part comprises a lifting servo motor (28), a lifting synchronous belt (27) and a pair of synchronous pulleys rotatably connected with the main seat (31), the lifting servo motor (28) is installed on the main seat (31), the lifting synchronous belt (27) is matched with the pair of synchronous pulleys, the lifting servo motor (28) is rotatably connected with one of the synchronous pulleys, and the bottom lifting sliding block (26) is fixedly connected with the lifting synchronous belt (27).

7. The tool of claim 1, wherein: The horizontal rotation driving component comprises a rotary driving cylinder (1), a rotary driving rack (2) and a rotary driving gear (3), the cylinder barrel of the rotary driving cylinder (1) is fixedly installed on a main base (31), the rotary driving gear (3) coaxially sleeves a rotary shaft of the horizontal rotation arm (4), the rotary driving rack (2) is fixedly connected with the piston rod of the rotary driving cylinder (1), and the rotary driving rack (2) is engaged with the rotary driving gear (3) to drive the horizontal rotation of the horizontal rotation arm (4).

8. A method of tightening the adjusting seat using the tightening tool for the adjusting seat according to claim 1, characterized by, At least comprising the following steps: The loading step S1: S11, locking the valve body (6) at one end of the horizontal rotation arm (4) by using the valve body position locking assembly, driving the horizontal rotation arm (4) to horizontally rotate by a preset angle by using the horizontal rotation driving component, transferring the valve body (6) to the installation station, and meanwhile, making the other end of the horizontal rotation arm (4) be in the loading position; S12, adjusting the installation hole of the valve body (6) by inserting and matching the adjusting base (30) with the adjusting base positioning block (18); The installation step S2: S21, driving the lifting movable frame and the adjusting base (30) to ascend by using the lifting servo driving component, so that the adjusting base (30) is inserted into the installation hole of the valve body (6) upward; S22, driving the tightening rotary shaft (19) to rotate by using the tightening driving assembly, so as to drive the adjusting base positioning block (18) and the adjusting base (30) to rotate around the axis, in combination with the axial force of the above-mentioned driving of the adjusting base (30) to be inserted into the installation hole of the valve body (6) upward, so that the adjusting base (30) is screwed into the installation hole of the valve body (6) in a threaded manner; S23, the angle monitoring device, the speed monitoring device and the position detection device are arranged below the adjusting base positioning block (18), and whether the adjusting base (30) is tightened in the installation hole of the valve body (6) is judged by the angle, the speed and the position of the tightening.

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