Servo tightening shaft device

Abstract

The utility model provides a servo tightening shaft device. The servo tightening shaft device comprises a base; the speed change mechanism is arranged on the base and comprises a planet part and a transmission part, the planet part is provided with a low-torque output end and a high-torque output end, the transmission part is movably arranged, and the input end of the transmission part is selectively and rotationally connected with the low-torque output end and the high-torque output end; the torsion multiplication mechanism is rotatably arranged on the base, the torsion multiplication mechanism is connected with the output end of the transmission part, and the torsion multiplication mechanism is used for being connected with a to-be-tightened bolt; the output end of the dynamic torque sensor is connected with the planetary part; the driving mechanism is in driving connection with the input end of the dynamic torque sensor, the driving mechanism drives the dynamic torque sensor to rotate, and the dynamic torque sensor drives the planet part to rotate. According to the technical scheme, the problem that in the prior art, a servo tightening shaft device is low in universality can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of servo tightening shafts, in particular to a servo tightening shaft device. Background Art

[0002] At present, the servo tightening shaft device is a modular product that integrates the servo motor, reducer, dynamic torque sensor, elastic telescopic shaft, etc. It combines the speed and angle of the servo motor with the high-precision dynamic torque signal output of the dynamic torque sensor. After the reducer decelerates and increases the torque, it obtains high-precision tightening torque feedback, tightening angle, tightening speed and other parameters. After the main control system of the servo tightening equipment analyzes, calculates and logically controls, it can complete the tightening and disassembly of bolts with different tightening curves and different tightening torques. The existing servo tightening shaft has no mechanical shifting, and the maximum tightening torque is small, which cannot meet the occasions with large tightening torque requirements. Utility Model Content

[0003] The utility model provides a servo tightening shaft device to solve the problem of low universality of the servo tightening shaft device in the prior art.

[0004] In order to solve the above problems, the utility model provides a servo tightening shaft device, including: a base; a speed change mechanism, which is arranged on the base, the speed change mechanism includes a planetary part and a transmission part, the planetary part has a low torque output end and a high torque output end, the transmission part is movably arranged, and the input end of the transmission part can be selectively rotatably connected with the low torque output end and the high torque output end; a torque multiplication mechanism, which is rotatably arranged on the base, the torque multiplication mechanism is connected to the output end of the transmission part, and the torque multiplication mechanism is used to be connected to the bolt to be tightened; a dynamic torque sensor, the output end of the dynamic torque sensor is connected to the planetary part; a driving mechanism is drivingly connected to the input end of the dynamic torque sensor, the driving mechanism drives the dynamic torque sensor to rotate, and the dynamic torque sensor drives the planetary part to rotate.

[0005] Furthermore, the planetary portion includes an internal gear carrier, a planetary carrier, planetary gears, a gear shaft and an internal gear. The internal gear carrier is connected to the housing of the dynamic torque sensor, the planetary gears are mounted on the internal gear carrier through bearings, the two ends of the planetary gears are respectively meshed with the inner wall of the internal gear carrier and the gear shaft, the gear shaft is coaxially mounted with the planetary carrier through bearings, the internal gear is mounted on the planetary carrier, the output end of the dynamic torque sensor is connected to the gear shaft, the input end of the transmission portion can be selectively connected to the gear shaft and the internal gear, the gear shaft is a low torque output end, and the internal gear is a high torque output end.

[0006] Furthermore, the internal gear rack includes an inner gear ring and a fixed flange connected to each other, the planetary part also includes a gear sleeve, the fixed flange is connected to the outer shell of the dynamic torque sensor, the planetary gear is installed on the inner gear ring through a bearing, the two ends of the planetary gear are respectively meshed with the inner wall of the inner gear ring and the gear shaft, one end of the gear sleeve is connected to the inner gear ring, the other end of the gear sleeve is connected to the transmission part, and the gear sleeve is connected to the base.

[0007] Furthermore, the transmission part includes a rotating sleeve, a transmission assembly and a shifter, the planetary part also includes a shift sleeve, one end of the shift sleeve is connected to the planetary part, the rotating sleeve is connected to the other end of the shift sleeve, the transmission assembly is rotatably disposed in the cavity of the rotating sleeve, the input end of the transmission assembly can be selectively rotatably connected to the low torque output end and the high torque output end, the output end of the transmission assembly is connected to the torque multiplication mechanism, the shifter is disposed on the rotating sleeve and connected to the transmission assembly, and the shifter is used to adjust the position of the transmission assembly so that the input end of the transmission assembly is rotatably connected to the low torque output end or the high torque output end.

[0008] Furthermore, the transmission assembly includes a first transmission shaft, a second transmission shaft, a first elastic member and a second elastic member. Parts of the first transmission shaft and the second transmission shaft are movably arranged in a rotating sleeve. The gear selector is connected to the first transmission shaft. One end of the first transmission shaft can be selectively connected to a low torque output end and a high torque output end. One end of the second transmission shaft is connected to the other end of the first transmission shaft. The other end of the second transmission shaft is connected to a torque multiplication mechanism. Both ends of the first elastic member are respectively abutted against an inner wall of the gear sleeve and one side of the gear selector. Both ends of the second elastic member are respectively abutted against the second transmission shaft and the other side of the gear selector.

[0009] Furthermore, the transmission part also includes a tightening screw, one end of which passes through the first transmission shaft and is limitedly matched with the cavity of the first transmission shaft, and the other end of the tightening screw passes through the cavity of the second transmission shaft and is connected to the cavity of the second transmission shaft. A part of the second transmission shaft is sleeved on the first transmission shaft so as to move axially along the first transmission shaft through the elastic force of the second elastic member.

[0010] Furthermore, the torque multiplier mechanism includes a guide support, a torque multiplier and a guide key. The guide support is arranged on the base. The guide support is rotatably connected to the torque multiplier through the guide key. The input end of the torque multiplier is connected to the output end of the transmission part. The torque multiplier is used to connect to the bolt to be tightened.

[0011] Furthermore, the torque multiplier has a limiting groove, the transmission part has a limiting protrusion, the limiting protrusion is inserted into the limiting groove, and the limiting protrusion and the limiting groove are matched in the circumferential upper limit direction of the transmission part.

[0012] Furthermore, the driving mechanism includes a driving motor and a reducer, the output end of the driving motor is connected to the input end of the reducer, and the output end of the reducer is connected to the input end of the dynamic torque sensor.

[0013] Furthermore, the servo tightening shaft device also includes a plurality of inspection ports, which are arranged at the bottom of the transmission part and are connected to the cavity of the transmission part, and the inspection ports are used to inspect the transmission part.

[0014] By applying the technical solution of the utility model, a servo tightening shaft device is provided, comprising: a base; a speed change mechanism, which is arranged on the base, the speed change mechanism comprises a planetary part and a transmission part, the planetary part has a low torque output end and a high torque output end, the transmission part is movably arranged, and the input end of the transmission part can be selectively rotatably connected with the low torque output end and the high torque output end; a torque multiplication mechanism, which is rotatably arranged on the base, the torque multiplication mechanism is connected to the output end of the transmission part, and the torque multiplication mechanism is used to be connected to the bolt to be tightened; a dynamic torque sensor, the output end of the dynamic torque sensor is connected to the planetary part; a driving mechanism, which is drivingly connected to the input end of the dynamic torque sensor, the driving mechanism drives the dynamic torque sensor to rotate, and the dynamic torque sensor drives the planetary part to rotate. By adopting this scheme, the input end of the transmission part can be selectively connected to the low torque output end and the high torque output end for rotation. In this way, the transmission part can be selectively connected to the low torque output end and the high torque output end according to actual needs, thereby improving the versatility of the servo tightening shaft device and effectively solving the problem that the servo tightening shaft device in the prior art has no mechanical shifting and the maximum tightening torque is small, which cannot meet the occasions with large tightening torque requirements; at the same time, the torque multiplication mechanism is set to realize torque amplification, and after torque amplification, the high torque tightening function can be realized. The dynamic torque sensor is set to detect the torque of the servo tightening shaft device in real time, further improving the intelligence of the servo tightening shaft device. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0016] Figure 1 A partial cross-sectional view of a servo tightening shaft device provided by an embodiment of the utility model is shown;

[0017] Figure 2 A partial enlarged view of the servo tightening shaft device in the figure is shown.

[0018] The above drawings include the following reference numerals:

[0019] 1. Drive motor; 2. Reducer; 3. Dynamic torque sensor; 4. Speed ​​change mechanism; 5. Guide key; 6. Torque multiplier; 7. Guide support; 8. Base; 9. Fixed flange; 13. Internal gear ring; 14. Planetary gear; 16. Gear shaft; 17. Planetary carrier; 18. Internal gear; 19. Shift shaft sleeve; 21. First transmission shaft; 22. First elastic member; 23. Shifter; 24. Rotating shaft sleeve; 25. Second elastic member; 26. Second transmission shaft; 27. Tightening screw; 28. Inspection port. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] like Figure 1 to Figure 2 As shown, an embodiment of the utility model provides a servo tightening shaft device, including: a base 8; a speed change mechanism 4, which is arranged on the base 8, and the speed change mechanism 4 includes a planetary part and a transmission part, the planetary part has a low torque output end and a high torque output end, the transmission part is movably arranged, and the input end of the transmission part can be selectively rotatably connected with the low torque output end and the high torque output end; a torque multiplication mechanism, which is rotatably arranged on the base 8, the torque multiplication mechanism is connected to the output end of the transmission part, and the torque multiplication mechanism is used to be connected to the bolt to be tightened; a dynamic torque sensor 3, the output end of the dynamic torque sensor 3 is connected to the planetary part; a driving mechanism, which is drivingly connected to the input end of the dynamic torque sensor 3, the driving mechanism drives the dynamic torque sensor 3 to rotate, and the dynamic torque sensor 3 drives the planetary part to rotate.

[0022] By adopting this scheme, the input end of the transmission part can be selectively connected to the low torque output end and the high torque output end for rotation. In this way, the transmission part can be selectively connected to the low torque output end and the high torque output end according to actual needs, thereby improving the versatility of the servo tightening shaft device and effectively solving the problem that the servo tightening shaft device in the prior art has no mechanical shifting and the maximum tightening torque is small, which cannot meet the occasions with large tightening torque requirements; at the same time, the torque multiplication mechanism is set to realize torque amplification, and after torque amplification, the high torque tightening function can be realized. The dynamic torque sensor 3 is set to detect the torque of the servo tightening shaft device in real time, further improving the intelligence of the servo tightening shaft device.

[0023] Among them, the planetary part includes an internal gear carrier, a planetary carrier 17, a planetary gear 14, a gear shaft 16 and an internal gear 18. The internal gear carrier is connected to the outer shell of the dynamic torque sensor 3. The planetary gear 14 is installed on the internal gear carrier through a bearing. The two ends of the planetary gear 14 are respectively meshed with the inner wall of the internal gear carrier and the gear shaft 16. The gear shaft 16 is coaxially installed with the planetary carrier 17 through a bearing. The internal gear 18 is installed on the planetary carrier 17. The output end of the dynamic torque sensor 3 is connected to the gear shaft 16. The input end of the transmission part can be selectively connected to the gear shaft 16 and the internal gear 18. The gear shaft 16 is a low torque output end, and the internal gear 18 is a high torque output end.

[0024] With such arrangement, the dynamic torque sensor 3 can drive the gear shaft 16 to rotate, while the planetary carrier 17, the planetary gears 14 and the internal gear carrier can drive the internal gear 18 to rotate. The gear ratio makes the input end of the transmission part have different rotation speeds when connected with the gear shaft 16 and the internal gear 18, thereby achieving the purpose of the gear shaft 16 being a low torque output end and the internal gear 18 being a high torque output end.

[0025] Furthermore, the inner gear rack includes an inner gear ring 13 and a fixed flange 9 which are connected to each other, the planetary part also includes a gear sleeve 19, the fixed flange 9 is connected to the outer shell of the dynamic torque sensor 3, the planetary gear 14 is installed on the inner gear ring 13 through a bearing, and the two ends of the planetary gear 14 are respectively meshed with the inner wall of the inner gear ring 13 and the gear shaft 16, one end of the gear sleeve 19 is connected to the inner gear ring 13, the other end of the gear sleeve 19 is connected to the transmission part, and the gear sleeve 19 is connected to the base 8.

[0026] With the above arrangement, a fixing flange 9 is provided, which can be connected to the housing of the dynamic torque sensor 3 ; a shift sleeve 19 is provided, which can be connected to the inner gear ring 13 , the transmission part and the base 8 .

[0027] In this embodiment, the transmission part includes a rotating sleeve 24, a transmission assembly and a shifter 23, and the planetary part also includes a shift sleeve 19, one end of the shift sleeve 19 is connected to the planetary part, and the rotating sleeve 24 is connected to the other end of the shift sleeve 19, and the transmission assembly is rotatably arranged in the cavity of the rotating sleeve 24, and the input end of the transmission assembly can be selectively rotatably connected to the low torque output end and the high torque output end, and the output end of the transmission assembly is connected to the torque multiplication mechanism, and the shifter 23 is arranged on the rotating sleeve 24 and connected to the transmission assembly, and the shifter 23 is used to adjust the position of the transmission assembly so that the input end of the transmission assembly is rotatably connected to the low torque output end or the high torque output end.

[0028] Through the above-mentioned arrangement, the position of the transmission assembly can be adjusted by using the shifter 23 so that the input end of the transmission assembly is rotationally connected to the low torque output end or the high torque output end, thereby achieving the purpose of gear shifting.

[0029] Among them, the transmission assembly includes a first transmission shaft 21, a second transmission shaft 26, a first elastic member 22 and a second elastic member 25. Parts of the first transmission shaft 21 and the second transmission shaft 26 can be movably arranged in the rotating sleeve 24. The gear 23 is connected to the first transmission shaft 21. One end of the first transmission shaft 21 can be selectively connected to the low torque output end and the high torque output end. One end of the second transmission shaft 26 is connected to the other end of the first transmission shaft 21, and the other end of the second transmission shaft 26 is connected to the torque multiplication mechanism. The two ends of the first elastic member 22 are respectively abutted against the inner wall of the gear sleeve 19 and one side of the gear 23. The two ends of the second elastic member 25 are respectively abutted against the second transmission shaft 26 and the other side of the gear 23.

[0030] With such arrangement, the first transmission shaft 21 can be connected to the low torque output end or the high torque output end; the second transmission shaft 26 is arranged to be connected to the torque multiplication mechanism; and the elastic force of the first elastic member 22 and the second elastic member 25 can be utilized to make the first transmission shaft 21 and the second transmission shaft 26 extend and retract in the rotating sleeve 24.

[0031] Among them, the transmission part also includes a tightening screw 27, one end of the tightening screw 27 penetrates into the first transmission shaft 21 and cooperates with the cavity of the first transmission shaft 21 to limit the position, the other end of the tightening screw 27 penetrates into the cavity of the second transmission shaft 26 and is connected to the cavity of the second transmission shaft 26, and a part of the second transmission shaft 26 is sleeved on the first transmission shaft 21 so as to move along the axial direction of the first transmission shaft 21 through the elastic force of the second elastic member 25.

[0032] By providing the tightening screw 27 , the first transmission shaft 21 and the second transmission shaft 26 can be connected.

[0033] Specifically, the torque multiplier mechanism includes a guide support 7, a torque multiplier 6 and a guide key 5. The guide support 7 is arranged on a base 8. The guide support 7 is rotatably connected to the torque multiplier 6 through the guide key 5. The input end of the torque multiplier 6 is connected to the output end of the transmission part. The torque multiplier 6 is used to connect to the bolt to be tightened.

[0034] With the above arrangement, the guide support 7 can support the torque multiplier 6; the torque multiplier 6 is connected to the bolt to be tightened to tighten or loosen the bolt to be tightened.

[0035] The torque multiplier 6 has a limiting groove, the transmission part has a limiting protrusion, the limiting protrusion is inserted into the limiting groove, and the limiting protrusion and the limiting groove cooperate in the circumferential upper limit of the transmission part.

[0036] Such an arrangement can improve the connection strength between the torque multiplier 6 and the transmission part.

[0037] In this embodiment, the driving mechanism includes a driving motor 1 and a reducer 2 , the output end of the driving motor 1 is connected to the input end of the reducer 2 , and the output end of the reducer 2 is connected to the input end of the dynamic torque sensor 3 .

[0038] The drive motor 1 can drive the reducer 2 to rotate, and the reducer 2 drives the dynamic torque sensor 3 to rotate after deceleration.

[0039] In this embodiment, the servo tightening shaft device further includes a plurality of inspection ports 28 , which are disposed at the bottom of the transmission part and communicated with the cavity of the transmission part. The inspection ports 28 are used to inspect the transmission part.

[0040] The plurality of inspection openings 28 are provided to facilitate inspection of the transmission part.

[0041] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0042] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0043] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0044] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0045] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0046] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A servo tightening shaft device, characterized in that: include: Base (8); A speed change mechanism (4) is arranged on the base (8), the speed change mechanism (4) comprises a planetary part and a transmission part, the planetary part has a low torque output end and a high torque output end, the transmission part is movably arranged, and the input end of the transmission part can be selectively rotatably connected to the low torque output end and the high torque output end; A torque multiplying mechanism is rotatably arranged on the base (8), the torque multiplying mechanism is connected to the output end of the transmission part, and the torque multiplying mechanism is used to be connected to the bolt to be tightened; A dynamic torque sensor (3), the output end of the dynamic torque sensor (3) being connected to the planetary part; The driving mechanism is drivingly connected to the input end of the dynamic torque sensor (3), the driving mechanism drives the dynamic torque sensor (3) to rotate, and the dynamic torque sensor (3) drives the planetary part to rotate.

2. The servo tightening shaft device according to claim 1, characterized in that: The planetary part comprises an internal gear carrier, a planet carrier (17), a planetary gear (14), a gear shaft (16) and an internal gear (18); the internal gear carrier is connected to the housing of the dynamic torque sensor (3); the planetary gear (14) is mounted on the internal gear carrier via a bearing; two ends of the planetary gear (14) are respectively meshed with the inner wall of the internal gear carrier and the gear shaft (16); the gear shaft (16) is coaxially mounted with the planet carrier (17) via a bearing; the internal gear (18) is mounted on the planet carrier (17); the output end of the dynamic torque sensor (3) is connected to the gear shaft (16); the input end of the transmission part can be selectively connected to the gear shaft (16) and the internal gear (18); the gear shaft (16) is the low torque output end, and the internal gear (18) is the high torque output end.

3. The servo tightening shaft device according to claim 2, characterized in that: The inner gear carrier comprises an inner gear ring (13) and a fixing flange (9) which are connected to each other. The planetary part further comprises a gear sleeve (19). The fixing flange (9) is connected to the outer shell of the dynamic torque sensor (3). The planetary gear (14) is mounted on the inner gear ring (13) through a bearing. The two ends of the planetary gear (14) are respectively meshed with the inner wall of the inner gear ring (13) and the gear shaft (16). One end of the gear sleeve (19) is connected to the inner gear ring (13), and the other end of the gear sleeve (19) is connected to the transmission part. The gear sleeve (19) is connected to the base (8).

4. The servo tightening shaft device according to claim 1, characterized in that: The transmission part comprises a rotating sleeve (24), a transmission assembly and a shifter (23); the planetary part further comprises a shifter sleeve (19); one end of the shifter sleeve (19) is connected to the planetary part; the rotating sleeve (24) is connected to the other end of the shifter sleeve (19); the transmission assembly is rotatably arranged in the cavity of the rotating sleeve (24); the input end of the transmission assembly can be selectively rotatably connected to the low torque output end or the high torque output end; the output end of the transmission assembly is connected to the torque multiplication mechanism; the shifter (23) is arranged on the rotating sleeve (24) and connected to the transmission assembly; the shifter (23) is used to adjust the position of the transmission assembly so that the input end of the transmission assembly is rotatably connected to the low torque output end or the high torque output end.

5. The servo tightening shaft device according to claim 4, characterized in that: The transmission assembly comprises a first transmission shaft (21), a second transmission shaft (26), a first elastic member (22) and a second elastic member (25); a portion of the first transmission shaft (21) and the second transmission shaft (26) are both movably arranged in the rotating sleeve (24); the shifter (23) is connected to the first transmission shaft (21); one end of the first transmission shaft (21) can be selectively connected to the low torque output end and the high torque output end; one end of the second transmission shaft (26) is connected to the other end of the first transmission shaft (21); the other end of the second transmission shaft (26) is connected to the torque multiplication mechanism; two ends of the first elastic member (22) are respectively in contact with the inner wall of the shift sleeve (19) and one side of the shifter (23); two ends of the second elastic member (25) are respectively in contact with the second transmission shaft (26) and the other side of the shifter (23).

6. The servo tightening shaft device according to claim 5, characterized in that: The transmission part also includes a tightening screw (27), one end of which penetrates into the first transmission shaft (21) and is limitedly matched with the cavity of the first transmission shaft (21), and the other end of which penetrates into the cavity of the second transmission shaft (26) and is connected to the cavity of the second transmission shaft (26), and a part of the second transmission shaft (26) is sleeved on the first transmission shaft (21) so as to move axially along the first transmission shaft (21) through the elastic force of the second elastic member (25).

7. The servo tightening shaft device according to claim 1, characterized in that: The torque multiplier mechanism comprises a guide support (7), a torque multiplier (6) and a guide key (5); the guide support (7) is arranged on the base (8); the guide support (7) is rotatably connected to the torque multiplier (6) via the guide key (5); the input end of the torque multiplier (6) is connected to the output end of the transmission part; and the torque multiplier (6) is used to be connected to the bolt to be tightened.

8. The servo tightening shaft device according to claim 7, characterized in that: The torque multiplier (6) has a limiting groove, the transmission part has a limiting protrusion, the limiting protrusion is inserted into the limiting groove, and the limiting protrusion and the limiting groove cooperate in the circumferential upper limit position of the transmission part.

9. The servo tightening shaft device according to claim 1, characterized in that: The driving mechanism comprises a driving motor (1) and a reducer (2), wherein the output end of the driving motor (1) is connected to the input end of the reducer (2), and the output end of the reducer (2) is connected to the input end of the dynamic torque sensor (3).

10. The servo tightening spindle device according to claim 1, characterized in that: The servo tightening shaft device also includes a plurality of inspection ports (28), which are arranged at the bottom of the transmission part and communicate with the cavity of the transmission part. The inspection ports (28) are used to inspect the transmission part.

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