Precise torsion adjustable piston rod part assembling machine equipment

Abstract

The invention discloses precise torsion adjustable piston rod part assembling equipment, and particularly relates to the technical field of oil cylinder assembly.The precise torsion adjustable piston rod part assembling equipment is provided with an aligning and gluing assembly, and after a piston rod is positioned and pressed, a coating seat moves to one side of a set of supporting and adjusting assemblies; at the moment, the center of the coating base is kept consistent with the center of a piston rod supported on the supporting and adjusting assembly, then the threaded part smoothly enters an inner cavity of the coating base, glue is applied at intervals in the direction of a threaded groove of the threaded part through the glue dispensing unit, and glue is evenly distributed to the whole meshing face along with the screwing-in propelling action of the glue dispensing unit; under the propelling action of the constant torque of the tightening and pushing assembly, the rotating tool sleeve drives the piston piece to be pushed and close to the piston rod, the assembly mode that the threaded part is in threaded connection with the nut is adopted, automatic assembly of the piston and the piston rod is completed, the assembled piston rod fills the fit clearance, the coaxiality of the piston and the piston rod is enhanced, and the assembly efficiency is improved. And eccentricity or swing caused by machining errors is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of oil cylinder assembly, in particular to a precise torque-adjustable piston rod assembly device. Background Art

[0002] The oil cylinder includes multiple structural components such as the piston rod and the piston. During processing and production, the piston rod and the piston need to be assembled together for easy production and use. In traditional assembly processes, the assembly of the piston rod and its accessories is mostly done manually.

[0003] After searching, the invention patent with publication number CN117206882B discloses a steering cylinder assembly machine and assembly method, which is equipped with multiple support mechanisms and can make corresponding adjustments for steering cylinders of different models; the assembly method is scientific and reasonable, and the concentricity of each part of the cylinder can be guaranteed during the assembly process.

[0004] In the above scheme, the cylinder barrel and the piston rod are assembled, and the assembly of the piston rod and the piston is not involved. Combined with the existing assembly method of the piston rod and the piston, a threaded connection is mainly used. Due to the manufacturing differences of the piston rod, the quality of the piston rod is not uniform, which is easy to leave quality risks when connected with the piston; when the piston rod and the piston are assembled together, the piston rod is easy to rotate with the piston. Summary of the invention

[0005] The purpose of the present invention is to provide a precise torque-adjustable piston rod assembly device to solve the problems mentioned in the above background technology.

[0006] The technical problems mainly solved by the present invention are:

[0007] In the existing solution, the piston rod and the piston are connected by threads. Due to the manufacturing differences of the piston rod, the quality of the piston rod is not uniform, which easily leaves quality risks when connected with the piston.

[0008] When the piston rod is assembled with the piston, the piston rod can easily rotate along with the piston.

[0009] The present invention can be implemented by the following technical solutions:

[0010] A precise torque adjustable piston rod assembly device comprises a stand, a tightening and pushing assembly is slidably arranged at one end of the upper surface of the stand, and a hydraulic platform is arranged at the rear side of the stand;

[0011] A pressing and positioning assembly is fixedly arranged at the other end of the upper surface of the stand and locks the piston rod head;

[0012] A mounting ring is provided at the rod head of the piston rod, and a threaded portion is provided at one end of the piston rod away from the rod head;

[0013] The support adjustment component is arranged between the pressing and positioning component and the tightening and pushing component, and is used to support and position the piston rod;

[0014] A tooling sleeve for clamping the piston member is provided on one side of the tightening and pushing assembly facing the supporting and adjusting assembly;

[0015] The glue adjustment assembly is located on the hydraulic platform and adjacent to one of the support adjustment assemblies;

[0016] The glue adjustment assembly includes a support plate that slides in the horizontal direction, a limit plate is slidably arranged in the vacant groove on the upper part of the support plate, and a coating seat is connected to the end of the limit plate, the center of the coating seat is consistent with the center of the piston rod supported by the support adjustment assembly, and a glue dispensing unit is arranged inside the coating seat for applying glue at intervals along the direction of the thread groove of the threaded part;

[0017] The piston member comprises a piston, a bearing seat and a nut, wherein the nut is connected to the piston through the bearing seat;

[0018] After dispensing, the rotating tooling sleeve drives the piston to push closer to the piston rod. After the piston rod passes through the center of the piston and the bearing seat, it is locked by the threaded part and the nut to complete the assembly of the components.

[0019] A further technical improvement of the present invention is that the clamping and positioning assembly includes a clamping seat fixedly connected to the stand, a hydraulic cylinder is installed on the upper supporting surface of the clamping seat, and a boss is installed on the lower supporting surface of the clamping seat, the pushing end of the hydraulic cylinder is connected to a positioning piece with a T-shaped structure, and the T-shaped end of the positioning piece enters into the hole groove of the mounting ring for clamping.

[0020] A further technical improvement of the present invention is that the stand is composed of two L-shaped vertical plates and connected together by a reinforcing plate, linear slide rails are installed on both top surfaces of the stand, and a rack adjacent to the linear slide rail is provided on the inner side of one top surface of the stand.

[0021] A further technical improvement of the present invention is that the tightening and pushing assembly includes a moving seat slidably arranged with the linear slide rail, a rotary hydraulic motor is installed on one side of the upper surface of the moving seat, an output end of the rotary hydraulic motor is connected to a rotary torque sensor through a reducer, and the output end of the rotary torque sensor is fixed to the side of the tooling sleeve;

[0022] A servo motor is installed on one end of the upper surface of the movable seat away from the tooling sleeve, and a gear driven by the servo motor is arranged below the movable seat, and the gear is meshed with the rack.

[0023] A further technical improvement of the present invention is that the support and adjustment component includes a sliding seat that slides with the linear slide rail, a steering housing that is driven by a worm to rotate is installed inside the sliding seat, a lead screw is threadedly sleeved on the middle part of the worm wheel, a supporting wheel is connected to the upper end of the lead screw, and a guide rod that slides with the sliding seat is connected to the mounting seat at the bottom of the supporting wheel.

[0024] The further technical improvement of the present invention is that: the glue adjustment assembly includes a first cylinder arranged on one end of the hydraulic platform, the driving end of the first cylinder is fixed to the support plate, a limit rod is installed on the side of the hydraulic platform, and the limit rod is slidably arranged with the support plate;

[0025] A second cylinder for pushing the limiting plate to slide along the vacant groove on the upper part of the supporting plate is installed on the rear side of the upper part of the supporting plate.

[0026] A further technical improvement of the present invention is that an abutment plate with an annular structure is provided at the inner wall end of the coating seat, and the lower surface of the abutment plate contacts the outer side of the thread of the threaded part.

[0027] A further technical improvement of the present invention is that the glue dispensing unit includes a linear drive unit arranged on the inner wall of the coating seat, a ring seat is slidably provided on the outside of the linear drive unit, a lifting unit is rotatably provided on the inside of the ring seat, the output end of the lifting unit is connected to a glue nozzle for applying glue along the direction of the threaded groove of the threaded part, and a socket is provided at one end of the coating seat away from the abutment plate to block the end of the threaded part.

[0028] A further technical improvement of the present invention is that: the inner wall surface of the tooling sleeve is provided with a plurality of fitting clamping blocks which slide simultaneously along the direction of the corresponding slide grooves, and the inclination direction of each fitting clamping block is consistent with the surface of the corresponding side nut.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. By setting up the adjustment glue coating component, after positioning and clamping the piston rod, the coating seat moves to one side of a set of support adjustment components. At this time, the center of the coating seat is consistent with the center of the piston rod supported by the support adjustment component, and then the threaded part smoothly enters the inner cavity of the coating seat, and the glue dispensing unit applies glue at intervals along the thread groove direction of the threaded part. The glue is evenly distributed to the entire meshing surface as the glue dispensing unit is screwed in and pushed, forming a continuous sealing layer to prevent hydraulic oil, gas or external pollutants from leaking through the thread gap, thereby improving the sealing reliability of the system. Under the pushing action of the constant torque of the tightening and pushing component, the rotating tool sleeve drives the piston part to push closer to the direction of the piston rod, and adopts the assembly method of threaded connection between the threaded part and the nut. With the rotation of the tool sleeve, the automatic assembly of the piston and the piston rod is completed. The assembled piston rod fills the matching gap, enhances the coaxiality of the piston and the piston rod, and reduces the eccentricity or swing caused by processing errors. The quality of the assembled products is improved and the standards are unified;

[0031] 2. By setting a clamping and positioning assembly and a tooling sleeve, the clamping and positioning assembly clamps and fixes the piston rod head, and multiple fitting clamps in the tooling sleeve are simultaneously centered and close to each other along the direction of the corresponding slide groove, fitting each surface of the nut, and clamping the nut. There is no need to clamp the piston. When the piston part is rotated by tightening the push assembly, the piston rod remains stationary and does not rotate with it, thereby effectively completing the assembly of the piston rod and the piston;

[0032] 3. Through the combined torque of the rotating hydraulic motor and the reducer, the tightening output torque is larger, which is suitable for the assembly of cylinder accessories of different sizes and has strong versatility; and the actual output torque of the reducer can be measured in real time through the rotating torque sensor to increase the assembly accuracy of the cylinder accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0034] Figure 1 It is a schematic diagram of the external structure of the present invention;

[0035] Figure 2 It is a three-dimensional structural schematic diagram of the tightening and pushing assembly of the present invention;

[0036] Figure 3 It is a schematic diagram of the installation structure of the piston rod and the piston of the present invention;

[0037] Figure 4 For the present invention Figure 1 A partial enlarged view of the middle A;

[0038] Figure 5 This is a schematic diagram of the internal structure of the coating seat of the present invention;

[0039] Figure 6 It is a schematic diagram of the installation structure of the fitting clamp block and the tooling sleeve of the present invention.

[0040] In the figure: 1. stand; 2. support adjustment component; 3. hydraulic platform; 4. tightening and pushing component; 5. clamping seat; 6. hydraulic cylinder; 7. positioning piece; 8. boss; 9. moving seat; 10. rotary hydraulic motor; 11. servo motor; 12. gear; 13. rack; 14. tooling sleeve; 15. rotary torque sensor; 16. linear slide; 17. sliding seat; 18. steering housing; 19. screw; 20. supporting wheel; 21. guide rod; 22. mounting ring; 23. threaded part; 24. limit rod; 25. first cylinder; 26. support plate; 27. limit plate; 28. second cylinder; 29. ​​coating seat; 30. linear drive unit; 31. abutment plate; 32. ring seat; 33. nozzle; 34. plug-in seat; 35. fitting clamp. DETAILED DESCRIPTION

[0041] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0042] See also Figure 1-Figure 6 As shown, the present invention provides a precise torque-adjustable piston rod installation device, including a stand 1, a tightening and pushing assembly 4 is slidably provided at one end of the upper surface of the stand 1, and a clamping and positioning assembly for locking the piston rod head is fixedly provided at the other end of the upper surface of the stand 1, a mounting ring 22 is provided at the rod head of the piston rod, and a threaded portion 23 is provided at the end of the piston rod away from the rod head, a hydraulic station 3 is provided at the rear side of the stand 1, two groups of support and adjustment assemblies 2 for supporting and positioning the piston rod are provided between the clamping and positioning assembly and the tightening and pushing assembly 4, and a tightening and pushing assembly 4 is provided on the side facing the support and adjustment assembly 2 For the tooling sleeve 14 clamped by the piston member, a side surface of the hydraulic platform 3 is adjacent to one of the groups of support and adjustment components 2 and provided with a glue adjustment component, the glue adjustment component includes a support plate 26 sliding in the horizontal direction, a limit plate 27 slidingly provided in the vacant groove on the upper part of the support plate 26, the limit plate 27 is arranged perpendicular to the sliding direction of the support plate 26, and the end of the limit plate 27 is connected to a coating seat 29, the center of the coating seat 29 is consistent with the center of the piston rod supported by the support and adjustment component 2, and a glue dispensing unit for applying glue at intervals along the thread groove direction of the threaded portion 23 is provided inside the coating seat 29;

[0043] The piston member comprises a piston, a bearing seat and a nut, wherein the nut is connected to the piston through the bearing seat;

[0044] After dispensing, the rotating tool sleeve 14 drives the piston member to push closer to the piston rod. After the piston rod passes through the center of the piston and the bearing seat, the threaded portion 23 is locked with the nut to complete the assembly of the components.

[0045] When assembling the piston rod and the piston, the piston rod is first supported horizontally by two sets of support and adjustment components 2, and the nut in the piston part is clamped by the tooling sleeve 14. The two sets of support and adjustment components 2 are raised and lowered in the vertical direction to change the vertical height, ensuring that the center of the piston rod and the piston part are consistent, and the assembly height is quickly positioned. The mounting ring 22 at the head of the piston rod is positioned by the clamping and positioning component to ensure the stability of the position of the piston rod when connected to the piston part, and stable clamping and assembly. It should be noted that in the initial state, the support plate 26 is in a sliding open state. After positioning the height of the piston rod, the limit plate 27 slides open and moves the coating seat 29 to one side of a set of support and adjustment components 2. At this time, the center of the coating seat 29 is consistent with the center of the piston rod supported by the support and adjustment component 2. Since the piston rod has been clamped and fixed, its position does not change. At the same time, the support plate 26 resets and slides, and the threaded portion 23 moves smoothly. Into the inner cavity of the coating seat 29, the glue dispensing unit applies glue at intervals along the direction of the thread groove of the threaded portion 23, that is, glue is applied to the bottom of the thread teeth. The glue is evenly distributed to the entire meshing surface as the glue dispensing unit is screwed in and pushed, forming a continuous sealing layer to prevent hydraulic oil, gas or external contaminants from leaking through the thread gap, thereby improving the sealing reliability of the system. After that, the glue coating component is adjusted to reset to the initial position, which will not affect the normal delivery of the tightening and pushing component 4. Under the pushing effect of the constant torque of the tightening and pushing component 4, the rotating tool sleeve 14 drives the piston member to be pushed closer to the direction of the piston rod. In this process, the threaded portion 23 of the piston rod passes through the center of the piston and the bearing seat, and engages with the nut. With the rotation of the tool sleeve 14, the automatic assembly of the piston and the piston rod is completed. The assembled piston rod fills the matching gap, enhances the coaxiality of the piston and the piston rod, and reduces the eccentricity or swing caused by processing errors.

[0046] See also Figure 1 As shown, the clamping and positioning assembly includes a clamping seat 5 fixedly connected to the stand 1, a hydraulic cylinder 6 is installed on the upper support surface of the clamping seat 5, and a boss 8 is installed on the lower support surface of the clamping seat 5, and a T-shaped positioning member 7 is connected to the pushing end of the hydraulic cylinder 6, and the T-shaped end of the positioning member 7 enters the hole groove of the mounting ring 22 for clamping;

[0047] The piston rod is first supported by two sets of support and adjustment components 2 to the same height as the boss 8, wherein the piston rod head is placed on the boss 8, and the hydraulic cylinder 6 pushes the positioning member 7 to snap into the mounting ring 22 at the rod head to complete the tightening of the piston rod. When the piston member is rotated by tightening the pushing component 4, the piston rod remains stationary and does not rotate with it, thereby effectively completing the assembly of the piston rod and the piston.

[0048] See also Figure 1 and Figure 2 As shown, the stand 1 is composed of two L-shaped vertical plates connected together by a reinforcing plate, and linear slide rails 16 are installed on both top surfaces of the stand 1, and a rack 13 adjacent to the linear slide rail 16 is provided on the inner side of one top surface of the stand 1;

[0049] The tightening and pushing assembly 4 includes a moving seat 9 that is slidably arranged with a linear slide rail 16. A rotary hydraulic motor 10 is installed on one side of the upper surface of the moving seat 9. The output end of the rotary hydraulic motor 10 is connected to a rotary torque sensor 15 through a reducer. The output end of the rotary torque sensor 15 is fixed to the side of the tooling sleeve 14. The rotary torque sensor 15 is used to measure the actual output torque of the reducer in real time. The torque adjustment accuracy is ≤0.5%. The assembly accuracy of the oil cylinder is increased through precise torque, thereby improving the assembly quality.

[0050] A servo motor 11 is installed on one end of the upper surface of the moving seat 9 away from the tooling sleeve 14, and a gear 12 driven by the servo motor 11 is provided below the moving seat 9, and the gear 12 is meshed with a rack 13;

[0051] After the dispensing is completed, the threaded portion 23 on the piston rod is meshed with the gear 12 and the rack 13, and the movable seat 9 moves toward a group of supporting and adjusting components 2. During the movement, it always slides along the direction of the linear guide rail 16;

[0052] Among them, after the rotary hydraulic motor 10 passes through the reducer, the speed is 5 rpm, and the torque value can be set. In conjunction with the reducer combined torque, the value is displayed by the rotary torque sensor 15. The tightening operation is stopped after the tightening reaches the value. When the hydraulic system pressure is 21MPa, the tightening output torque is about 50,000 Nm, which is suitable for the assembly of cylinder accessories of different sizes.

[0053] See also Figure 2 As shown, the support adjustment assembly 2 includes a sliding seat 17 that is slidably matched with the linear slide rail 16, a steering housing 18 that is driven by a worm to rotate is installed inside the sliding seat 17, a lead screw 19 is threadedly sleeved in the middle of the worm wheel, a supporting wheel 20 is connected to the upper end of the lead screw 19, and a guide rod 21 that is slidably matched with the sliding seat 17 is connected to the mounting seat at the bottom of the supporting wheel 20;

[0054] The piston rod is supported by the supporting wheel 20. When the worm wheel is driven by the worm, the threaded action with the lead screw 19 causes the lead screw 19 to rise and fall in the vertical direction, thereby changing the height of the supporting wheel 20, so that the center of the piston rod is consistent with that of the piston, and the positioning is fast.

[0055] See also Figure 4As shown, the glue adjustment assembly includes a first cylinder 25 disposed on one end of the hydraulic platform 3, the push end of the first cylinder 25 is fixed to the support plate 26, and a limit rod 24 is installed on the side of the hydraulic platform 3, and the limit rod 24 and the support plate 26 are slidably arranged;

[0056] A second cylinder 28 is installed on the rear side of the upper portion of the support plate 26 to push the limiting plate 27 to slide along the vacant groove on the upper portion of the support plate 26;

[0057] When the support plate 26 is in the open state, the second cylinder 28 pushes the limit plate 27, so that the coating seat 29 enters the position consistent with the center of the piston rod, and then the support plate 26 is driven to reset by the first cylinder 25, so that the threaded portion 23 of the piston rod enters the coating seat 29, so that it is pre-coated with thread glue. After the thread glue is cured, a plastic film is formed on the thread meshing surface, which increases the friction and mechanical bite effect to prevent the threaded connection from gradually loosening due to alternating loads.

[0058] See also Figure 5 As shown, the inner wall end of the coating seat 29 is provided with an abutment plate 31 of an annular structure, the lower surface of the abutment plate 31 contacts the outer side of the thread of the threaded portion 23, and enters the coating seat 29 through the opening in the middle of the abutment plate 31;

[0059] The glue dispensing unit includes a linear drive unit 30 arranged on the inner wall of the coating seat 29, the linear drive unit 30 is a linear motor, the outer side of the linear drive unit 30 is provided with a ring seat 32 for sliding, the inner side of the ring seat 32 is provided with a lifting unit for rotation, the lifting unit is an electric push rod, the output end of the lifting unit is connected to a glue nozzle 33 for applying glue along the direction of the thread groove of the threaded part 23, and the end of the coating seat 29 away from the abutment plate 31 is provided with a plug-in seat 34 for blocking the end of the threaded part 23;

[0060] After the end of the threaded portion 23 is fitted with the socket 34, the glue nozzle 33 in the ring seat 32 rotates in a circle. With the advancement of the linear drive unit 30, the glue nozzle 33 will advance a short distance each time it rotates, and glue is applied at intervals around the thread groove direction of the threaded portion 23 to prevent the thread glue from overflowing.

[0061] See also Figure 6 As shown, the inner wall surface of the tooling sleeve 14 is provided with a plurality of fitting clamping blocks 35 that slide simultaneously along the direction of the corresponding slide grooves, and the inclination direction of each fitting clamping block 35 is consistent with the surface of the corresponding side nut;

[0062] The nut in the piston part is installed in the tooling sleeve 14 so that it is placed centrally on the inner wall surface of the tooling sleeve 14. Then, a plurality of fitting clamps 35 are simultaneously centered and approached along the corresponding slide groove direction to fit the various surfaces of the nut and clamp the nut. The threaded portion 23 contacts the nut after passing through the piston. Due to the rotation of the tooling sleeve 14, the assembly of the piston and the piston rod is completed.

[0063] When the present invention is in use, by setting up the glue adjustment component, after positioning and pressing the height of the piston rod, the coating seat 29 is moved to one side of a group of support adjustment components 2, at which time the center of the coating seat 29 is consistent with the center of the piston rod supported by the support adjustment component 2, the support plate 26 is reset and slid, the threaded portion 23 smoothly enters the inner cavity of the coating seat 29, and the glue dispensing unit applies glue at intervals along the direction of the thread groove of the threaded portion 23. The glue is evenly distributed to the entire meshing surface as the glue dispensing unit is screwed in and pushed, forming a continuous sealing layer to prevent hydraulic oil, gas or external pollution. The dye leaks through the thread gap, improving the sealing reliability of the system. Under the pushing effect of the constant torque of the tightening push component 4, the rotating tool sleeve 14 drives the piston member to push closer to the piston rod. In this process, after the threaded portion 23 of the piston rod passes through the center of the piston and the bearing seat, the threaded portion 23 is assembled with the nut thread connection. With the rotation of the tool sleeve 14, the automatic assembly of the piston and the piston rod is completed. The assembled piston rod fills the matching gap, enhances the coaxiality of the piston and the piston rod, and reduces the eccentricity or swing caused by processing errors.

[0064] By setting up a clamping and positioning component and a tooling sleeve 14, the clamping and positioning component clamps and fixes the piston rod head, and the multiple fitting clamps 35 in the tooling sleeve 14 are simultaneously centered and approached along the corresponding slide groove direction, fitting the various surfaces of the nut to clamp the nut. There is no need to clamp the piston. When the piston part is rotated by tightening the pushing component 4, the piston rod remains stationary and does not rotate with it, thereby effectively completing the assembly of the piston rod and the piston.

[0065] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A precision torque adjustable piston rod assembly device, comprising a stand (1), characterized in that: Tighten the pushing assembly (4), which is slidably arranged on one end of the upper surface of the stand (1), and a hydraulic platform (3) is arranged on the rear side of the stand (1); A clamping and positioning assembly is fixedly arranged on the other end of the upper surface of the stand (1) and locks the piston rod head; A mounting ring (22) is provided at the rod head of the piston rod, and a threaded portion (23) is provided at one end of the piston rod away from the rod head; The support adjustment component (2) is arranged between the pressing and positioning component and the tightening and pushing component (4) and is used for supporting and positioning the piston rod; A tool sleeve (14) for clamping the piston member is provided on the side of the tightening and pushing assembly (4) facing the supporting and adjusting assembly (2); A glue adjustment assembly is arranged on the hydraulic platform (3) and adjacent to one of the support adjustment assemblies (2); The glue adjustment assembly comprises a support plate (26) sliding in the horizontal direction, a limit plate (27) slidingly arranged in a vacant groove on the upper part of the support plate (26), a coating seat (29) connected to the end of the limit plate (27), the center of the coating seat (29) being consistent with the center of the piston rod supported by the support adjustment assembly (2), and a glue dispensing unit for applying glue at intervals along the direction of the thread groove of the threaded part (23) being arranged inside the coating seat (29); The piston member comprises a piston, a bearing seat and a nut, wherein the nut is connected to the piston through the bearing seat; After dispensing, the rotating tool sleeve (14) drives the piston member to be pushed toward the piston rod. After the piston rod passes through the center of the piston and the bearing seat, the threaded portion (23) is locked with the nut to complete the assembly of the components.

2. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The clamping and positioning assembly comprises a clamping seat (5) fixedly connected to a stand (1), a hydraulic cylinder (6) being installed on the upper support surface of the clamping seat (5), and a boss (8) being installed on the lower support surface of the clamping seat (5), a pushing end of the hydraulic cylinder (6) being connected to a positioning member (7) of a T-shaped structure, and the T-shaped end of the positioning member (7) being clamped in a hole groove of a mounting ring (22).

3. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The stand (1) is composed of two L-shaped vertical plates connected together by a reinforcing plate, both top surfaces of the stand (1) are installed with linear slide rails (16), and a rack (13) adjacent to the linear slide rail (16) is provided on the inner side of one top surface of the stand (1).

4. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The tightening and pushing assembly (4) comprises a moving seat (9) slidably arranged with a linear slide rail (16), a rotary hydraulic motor (10) is installed on one side of the upper surface of the moving seat (9), an output end of the rotary hydraulic motor (10) is connected to a rotary torque sensor (15) via a reducer, and an output end of the rotary torque sensor (15) is fixed to a side surface of a tooling sleeve (14); A servo motor (11) is installed at one end of the upper surface of the movable seat (9) away from the tooling sleeve (14), and a gear (12) driven by the servo motor (11) is provided below the movable seat (9), and the gear (12) is meshed with a rack (13).

5. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The support adjustment assembly (2) comprises a sliding seat (17) which is slidably matched with the linear slide rail (16); a steering housing (18) which is driven by a worm to rotate is installed inside the sliding seat (17); a lead screw (19) is threadedly sleeved on the middle part of the worm wheel; a supporting wheel (20) is connected to the upper end of the lead screw (19); and a guide rod (21) which is slidably matched with the sliding seat (17) is connected to the mounting seat at the bottom of the supporting wheel (20).

6. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The glue adjustment assembly comprises a first cylinder (25) arranged on one end of a hydraulic platform (3), a driving end of the first cylinder (25) is fixed to a support plate (26), a limit rod (24) is installed on the side of the hydraulic platform (3), and the limit rod (24) and the support plate (26) are slidably arranged; A second cylinder (28) is installed on the rear side of the upper portion of the support plate (26) to push the limiting plate (27) to slide along the vacant groove on the upper portion of the support plate (26).

7. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: An abutment plate (31) with an annular structure is provided at the inner wall end of the coating seat (29), and the lower surface of the abutment plate (31) contacts the outer side of the thread of the threaded portion (23).

8. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The glue dispensing unit comprises a linear drive unit (30) arranged on the inner wall of a coating seat (29); a ring seat (32) is slidably provided on the outside of the linear drive unit (30); a lifting unit is rotatably provided on the inside of the ring seat (32); an output end of the lifting unit is connected to a glue nozzle (33) for applying glue along the direction of a thread groove of a threaded portion (23); and a plug-in seat (34) for blocking the end of the threaded portion (23) is provided at one end of the coating seat (29) away from the abutment plate (31) 9. The precise torque adjustable piston rod assembly device according to claim 1, characterized in that: The inner wall surface of the tooling sleeve (14) is provided with a plurality of fitting clamping blocks (35) which slide simultaneously along the direction of the corresponding sliding grooves, and the inclination direction of each fitting clamping block (35) is consistent with the surface of the corresponding side nut.

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