Bolt tightening mechanism

Abstract

The utility model relates to the technical field of clutch pressure plate assembly tool design, in particular to a bolt tightening mechanism which comprises a mounting shell, a bolt tightening device and a bolt tightening device. The driving gear is arranged in the containing cavity, a first rotating shaft is arranged in the middle of the driving gear, and the driving gear is fixedly connected with the first rotating shaft; the driven one-way gears are arranged in the containing cavity, second rotating shafts are arranged in the middles of the driven one-way gears and used for being connected with bolts to be tightened, the driven one-way gears are in one-way sliding connection with the second rotating shafts, and when the driving gear drives the driven one-way gears to rotate, the second rotating shafts rotate synchronously; when the driving gear is static and the second rotating shaft rotates, the driven one-way gear is static. When the driving gear drives the driven one-way gear to rotate, the second rotating shaft synchronously rotates, and when the second rotating shaft is independently rotated, the driven one-way gear on the outer side cannot be driven to rotate, so that part of the bolts to be tightened can be independently adjusted, and the applicability of the bolt tightening mechanism is improved.

Description

Technical Field

[0001] This utility model relates to the field of clutch pressure plate assembly tool design technology, specifically to a bolt tightening mechanism. Background Technology

[0002] Currently, the clutch pressure plate and driven plate of most commercial vehicles are fixed to the engine flywheel by 12 M10 bolts. Since the clutch pressure plate works mainly by the extension and contraction of the internal diaphragm spring to achieve the engagement or disengagement of the clutch driven plate and the flywheel, the bolts must first overcome the elastic force of the diaphragm spring before the clutch pressure plate housing can engage with the flywheel. The current industry assembly requirements are a bolt tightening torque of 50-70 N.m.

[0003] In the prior art, such as the device for applying tightening torque described in patent number CN104613133A, a planetary gear mechanism consisting of a sun gear and four planetary gears is mounted on a disc-shaped bracket. This allows the sun gear and planetary gears to rotate around a fixed axis on a support formed by the disc-shaped bracket and end caps. Both ends of the sun gear shaft and planetary gear shafts are designed with internal hexagonal sockets. A torque wrench or ordinary wrench is connected to one end of the sun gear shaft, and four adapters are connected to one end of each of the four planetary gear shafts. By rotating the wrench to apply tightening torque, the device of this invention can synchronously and evenly apply torque to the screw to be tightened, and the 1:2 transmission ratio between the sun gear and planetary gears accelerates the assembly of the screw.

[0004] However, while the existing device for applying tightening torque can apply torque synchronously and evenly to the screws to be tightened, it is difficult to adjust the screws individually in special cases, such as when some screws still need to be adjusted after being tightened. This presents a problem of not being able to cope with special situations. Utility Model Content

[0005] This application provides a bolt tightening mechanism that can solve the problem of the existing device for applying tightening torque. The device can apply torque synchronously and evenly to the screw to be tightened. However, in special cases, such as when some screws still need to be adjusted after being tightened, it is difficult to adjust the screws individually using this device, which has the problem of not being able to cope with special situations.

[0006] In a first aspect, embodiments of this application provide a bolt tightening mechanism, which includes:

[0007] The mounting housing has a receiving cavity inside;

[0008] A drive gear is disposed within the receiving cavity, and a first rotating shaft is provided in the middle of the drive gear, and the drive gear is fixedly connected to the first rotating shaft;

[0009] Multiple driven one-way gears are disposed within the receiving cavity. A second rotating shaft is provided in the middle of each driven one-way gear. The second rotating shaft is used to connect with the bolt to be tightened. The driven one-way gear and the second rotating shaft are unidirectionally slidably connected. When the driving gear drives the driven one-way gear to rotate, the second rotating shaft rotates synchronously. When the driving gear is stationary and the second rotating shaft rotates, the driven one-way gear is stationary.

[0010] In one embodiment, the receiving cavity is further provided with a transition gear, which meshes with the driving gear and all driven one-way gears. When the driving gear rotates, it drives the transition gear to rotate, and the transition gear drives all the driven one-way gears to rotate.

[0011] In one embodiment, both ends of the first rotating shaft and the second rotating shaft extend out of the mounting housing and are rotatably connected to the mounting housing. One end of the first rotating shaft and the second rotating shaft are used to connect to the bolt to be tightened, and the other end is used to connect to the air gun.

[0012] In one embodiment, a dynamic torque sensor is provided on the outside of the mounting housing. The input shaft of the dynamic torque sensor is connected to the end of the first or second rotating shaft that is used to connect with the bolt to be tightened, and the output shaft of the dynamic torque sensor is used to connect with the bolt to be tightened.

[0013] In one embodiment, the outer side of the mounting housing is further provided with a sensor bracket corresponding to each of the dynamic torque sensors. The sensor bracket includes an L-shaped bracket and a reinforcing plate. The short plate of the L-shaped bracket is connected to the mounting housing, and the long plate is connected to the corresponding dynamic torque sensor. The reinforcing plate is disposed on the inner side of the L-shaped bracket and is connected to the short plate and the long plate.

[0014] In one embodiment, the transition gear has a gear hole in the middle and is located in the middle of the receiving cavity. The receiving cavity has a positioning boss, and a first bearing is provided on the outside of the positioning boss. The inner side of the first bearing is press-fitted with the outer side of the positioning boss, and the outer side is press-fitted with the gear hole wall of the transition gear.

[0015] In one embodiment, the mounting housing is further provided with a suspension assembly for connecting to a suspension point.

[0016] In one embodiment, the mounting housing is further provided with a slide rail, the slide rail including an arc-shaped sliding section and connecting sections located at both ends of the arc-shaped sliding section, the connecting sections being connected to the mounting housing, the virtual center of the arc-shaped sliding section coinciding with the center of the transition gear, the suspension assembly being slidably disposed on the arc-shaped sliding section, and when the suspension assembly is fixed on the suspension point, the bolt to be tightened connected to the driven one-way gear can be replaced by adjusting the position of the suspension assembly on the slide rail.

[0017] In one embodiment, the suspension assembly includes:

[0018] A suspension bracket, the upper side of which is used to connect with the suspension point, and the lower side is provided with a connecting groove, the connecting groove being fitted onto the arc-shaped sliding section;

[0019] A roller pin passes through the connecting groove and is connected to the suspension bracket;

[0020] A roller, which is rotatably mounted on the roller pin, is used to support the underside of the arc-shaped sliding section.

[0021] In one embodiment, the positioning boss is an annular boss, and the mounting shell has a central through hole in the middle, the inner diameter of which is less than or equal to the inner diameter of the positioning boss.

[0022] The beneficial effects of the technical solutions provided in this application include:

[0023] When using this bolt tightening mechanism, the driving gear is set in the receiving cavity, and a first rotating shaft is provided in the middle of the driving gear. The driving gear is fixedly connected to the first rotating shaft. Multiple driven one-way gears are set in the receiving cavity, and a second rotating shaft is provided in the middle of the driven one-way gears. The second rotating shaft is used to connect with the bolt to be tightened. The driven one-way gears are unidirectionally slidably connected to the second rotating shaft. When the driving gear drives the driven one-way gears to rotate, the second rotating shaft rotates synchronously. When the driving gear is stationary and the second rotating shaft rotates, the driven one-way gears are stationary. That is, when the second rotating shaft is rotated alone, it will not drive the outer driven one-way gears to rotate. Because the second rotating shaft rotates synchronously when the driving gear drives the driven one-way gear, rotating the second rotating shaft alone will not drive the outer driven one-way gear 3 to rotate. This allows for individual adjustment of some bolts to be tightened, improving the applicability of the bolt tightening mechanism. It solves the problem of existing devices that apply tightening torque synchronously and evenly to the bolts to be tightened, but in special cases, such as when some bolts still need adjustment after tightening, it is difficult to adjust the bolts individually using this device, which is difficult to deal with special situations. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front structural diagram of an embodiment of a bolt tightening mechanism according to the present invention.

[0026] Figure 2 This is a schematic diagram of the rear structure of an embodiment of the bolt tightening mechanism of this utility model.

[0027] Figure 3 This is a front view structural diagram of an embodiment of a bolt tightening mechanism according to the present invention.

[0028] Figure 4 This is a side view of an embodiment of a bolt tightening mechanism according to the present invention.

[0029] Figure 5 This is a schematic diagram of the internal structure of the receiving cavity in an embodiment of the bolt tightening mechanism of this utility model.

[0030] Figure 6 This is a cross-sectional structural diagram of an embodiment of the bolt tightening mechanism of this utility model.

[0031] In the diagram: 1. Mounting housing; 11. Positioning boss; 12. First bearing; 13. Central through hole; 2. Driving gear; 3. Driven one-way gear; 4. Transition gear; 51. First rotating shaft; 52. Second rotating shaft; 6. Dynamic torque sensor; 7. Sensor bracket; 71. L-shaped bracket; 72. Reinforcing plate; 8. Socket wrench; 9. Suspension assembly; 91. Suspension bracket; 92. Roller pin; 93. Roller; 10. Slide rail; 101. Arc-shaped sliding section; 102. Connecting section; 20. Coupling; 30. Flat key; 40. Second bearing. Detailed Implementation

[0032] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0033] This application provides a bolt tightening mechanism that solves the problem of applying tightening torque in the prior art. The device can apply torque synchronously and evenly to the screw to be tightened. However, in special cases, such as when some screws still need to be adjusted after being tightened, it is difficult to adjust the screws individually through this device, which has the problem of being unable to cope with special situations.

[0034] In the prior art, the clutch pressure plate and driven plate of a commercial vehicle are fixed to the engine flywheel by 12 M10 bolts, which are spaced apart circumferentially.

[0035] like Figure 2 , Figure 4 , Figure 5 and Figure 6 As shown, this application provides a bolt tightening mechanism, which includes:

[0036] Mounting housing 1, which has a receiving cavity inside;

[0037] The drive gear 2 is disposed in the receiving cavity, and a first rotating shaft 51 is provided in the middle of the drive gear 2. The drive gear 2 is fixedly connected to the first rotating shaft 51.

[0038] Multiple driven one-way gears 3 are arranged in the receiving cavity. A second rotating shaft 52 is provided in the middle of the driven one-way gear 3. The second rotating shaft 52 is used to connect with the bolt to be tightened. The driven one-way gear 3 and the second rotating shaft 52 are unidirectionally slidably connected. When the driving gear 2 drives the driven one-way gear 3 to rotate, the second rotating shaft 52 rotates synchronously. When the driving gear 2 is stationary and the second rotating shaft 52 rotates, the driven one-way gear 3 is stationary.

[0039] When using this bolt tightening mechanism, the driving gear 2 is set in the receiving cavity, and the driving gear 2 has a first rotating shaft 51 in the middle. The driving gear 2 is fixedly connected to the first rotating shaft 51. Multiple driven one-way gears 3 are set in the receiving cavity. The driven one-way gear 3 has a second rotating shaft 52 in the middle. The second rotating shaft 52 is used to connect with the bolt to be tightened. The driven one-way gear 3 is unidirectionally slidably connected to the second rotating shaft 52. When the driving gear 2 drives the driven one-way gear 3 to rotate, the second rotating shaft 52 rotates synchronously. When the driving gear 2 is stationary and the second rotating shaft 52 rotates, the driven one-way gear 3 is stationary. That is, when the second rotating shaft 52 is rotated alone, it will not drive the outer driven one-way gear 3 to rotate. When the driving gear 2 drives the driven one-way gear 3 to rotate, the second rotating shaft 52 rotates synchronously. When the second rotating shaft 52 is rotated alone, it will not drive the outer driven one-way gear 3 to rotate. This allows for individual adjustment of some bolts to be tightened, improving the applicability of the bolt tightening mechanism. It solves the problem that in the prior art, a device for applying tightening torque can apply torque synchronously and evenly to the bolts to be tightened, but in special cases, such as when some bolts still need adjustment after tightening, it is difficult to adjust the bolts individually using this device, which has the problem of being unable to cope with special situations.

[0040] In this example, the mounting housing 1 includes a left housing and a right housing, which are detachably connected. The drive gear 2 is fixedly connected to the first rotating shaft 51 via a flat key 30. A second bearing 40 is provided at the connection point between the first rotating shaft 51 and the second rotating shaft 52 and the mounting housing 1. The inner side of the second bearing 40 is press-fitted to the outer side of the first rotating shaft 51 or the second rotating shaft 52, and the outer side is press-fitted to the mounting housing 1.

[0041] like Figure 5 As shown, in some optional embodiments, a transition gear 4 is also provided in the receiving cavity. The transition gear 4 meshes with the driving gear 2 and all driven one-way gears 3. When the driving gear 2 rotates, it drives the transition gear 4 to rotate, and the transition gear 4 drives all driven one-way gears 3 to rotate.

[0042] In this embodiment, a transition gear 4 is also provided in the receiving cavity. The transition gear 4 meshes with the driving gear 2 and all driven one-way gears 3. When the driving gear 2 rotates, it drives the transition gear 4 to rotate, and the transition gear 4 drives all driven one-way gears 3 to rotate, which facilitates the transmission of the driven one-way gears 3.

[0043] In this example, there are three driven one-way gears 3, which are circumferentially spaced from the driving gear 2 and have the same diameter. The transition gear 4 is located at the center of the circle where the axes of the three driven one-way gears 3 and the driving gear 2 are located, and its diameter is larger than that of the driving gear 2. The axis of the transition gear 4 corresponds to the center of the mounting housing 1.

[0044] like Figure 2As shown, in some optional embodiments, both ends of the first rotating shaft 51 and the second rotating shaft 52 extend out of the mounting shell 1 and are rotatably connected to the mounting shell 1. One end of the first rotating shaft 51 and the second rotating shaft 52 are used to connect to the bolt to be tightened, and the other end is used to connect to the air gun.

[0045] In this embodiment, both ends of the first rotating shaft 51 and the second rotating shaft 52 extend out of the mounting shell 1 and are rotatably connected to the mounting shell 1. One end of the first rotating shaft 51 and the second rotating shaft 52 are used to connect to the bolt to be tightened, and the other end is used to connect to the air gun. When the drive gear 2 is rotated, one of the bolts to be tightened will also be tightened, which increases the number of bolts to be tightened at one time and reduces resource waste.

[0046] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some optional embodiments, a dynamic torque sensor 6 is provided on the outside of the mounting housing 1. The input shaft of the dynamic torque sensor 6 is connected to the first rotating shaft 51 or the second rotating shaft 52 for connecting to one end of the bolt to be tightened, and the output shaft of the dynamic torque sensor 6 is connected to the bolt to be tightened.

[0047] In this embodiment, a number of dynamic torque sensors 6 are provided on the outside of the mounting housing 1, the number of which is the sum of the number of the first rotating shaft 51 and the second rotating shaft 52. The input shaft of the dynamic torque sensor 6 is connected to the end of the first rotating shaft 51 or the second rotating shaft 52 for connection with the bolt to be tightened. The output shaft of the dynamic torque sensor 6 is connected to the bolt to be tightened, so as to facilitate reading the torque of the bolt.

[0048] In this example, a socket wrench 8 is provided on the output shaft of the dynamic torque sensor 6, which is used to connect with the bolt to be tightened. The input shaft of the dynamic torque sensor 6 is connected to the end of the first rotating shaft 51 or the second rotating shaft 52 that is used to connect with the bolt to be tightened via a coupling 20.

[0049] like Figure 1 , Figure 3 and Figure 4 As shown, in some optional embodiments, the outer side of the mounting housing 1 is also provided with a sensor bracket 7 corresponding to the dynamic torque sensor 6. The sensor bracket 7 includes an L-shaped bracket 71 and a reinforcing plate 72. The short plate of the L-shaped bracket 71 is connected to the mounting housing 1, and the long plate is connected to the corresponding dynamic torque sensor 6. The reinforcing plate 72 is disposed on the inner side of the L-shaped bracket 71 and is connected to the short plate and the long plate.

[0050] In this embodiment, a sensor bracket 7 corresponding to the dynamic torque sensor 6 is also provided on the outside of the mounting shell 1. The sensor bracket 7 includes an L-shaped bracket 71 and a reinforcing plate 72. The short plate of the L-shaped bracket 71 is connected to the mounting shell 1, and the long plate is connected to the corresponding dynamic torque sensor 6. The reinforcing plate 72 is disposed on the inside of the L-shaped bracket 71 and is connected to the short plate and the long plate, which facilitates fixing the dynamic torque sensor 6 to the outside of the mounting shell 1, and ensures the connection strength and improves the structural stability.

[0051] like Figure 5 As shown, in some optional embodiments, the transition gear 4 has a gear hole in the middle and is located in the middle of the receiving cavity. The receiving cavity has a positioning boss 11, and a first bearing 12 is provided on the outside of the positioning boss 11. The inner side of the first bearing 12 is press-fitted with the outer side of the positioning boss 11, and the outer side is press-fitted with the gear hole wall of the transition gear 4.

[0052] In this embodiment, a gear hole is provided in the middle of the transition gear 4 and is located in the middle of the receiving cavity. A positioning boss 11 is provided in the receiving cavity. A first bearing 12 is provided on the outside of the positioning boss 11. The inner side of the first bearing 12 is press-fitted with the outer side of the positioning boss 11, and the outer side is press-fitted with the gear hole wall of the transition gear 4, which facilitates the installation of the transition gear 4 and ensures the normal rotation of the transition gear 4.

[0053] like Figure 1 , Figure 2 and Figure 3 As shown, in some optional embodiments, the mounting housing 1 is further provided with a suspension assembly 9, which is used to connect to the suspension point.

[0054] In this embodiment, a suspension assembly 9 is also provided on the mounting shell 1. The suspension assembly 9 is used to connect with the lifting point to facilitate the lifting and fixing of the bolt tightening mechanism and reduce the physical fatigue of the operator.

[0055] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, in some optional embodiments, the mounting housing 1 is also provided with a slide rail 10. The slide rail 10 includes an arc-shaped sliding section 101 and connecting sections 102 located at both ends of the arc-shaped sliding section 101. The connecting sections 102 are connected to the mounting housing 1. The virtual center of the arc-shaped sliding section 101 coincides with the center of the transition gear 4. The suspension assembly 9 is slidably disposed on the arc-shaped sliding section 101. When the suspension assembly 9 is fixed on the suspension point, the bolt to be tightened connected to the driven one-way gear 3 can be replaced by adjusting the position of the suspension assembly 9 on the slide rail 10.

[0056] In this embodiment, a slide rail 10 is also provided on the mounting shell 1. The slide rail 10 includes an arc-shaped sliding section 101 and connecting sections 102 located at both ends of the arc-shaped sliding section 101. The connecting sections 102 are connected to the mounting shell 1. The virtual center of the arc-shaped sliding section 101 coincides with the center of the transition gear 4. The suspension assembly 9 is slidably disposed on the arc-shaped sliding section 101. When the suspension assembly 9 is fixed on the suspension point, the position of the suspension assembly 9 on the slide rail 10 can be adjusted, that is, the mounting shell 1 is rotated, and the center of rotation is the center of the mounting shell 1. The bolt to be tightened connected to the driven one-way gear 3 can be replaced, making the operation more convenient.

[0057] like Figure 3 and Figure 4 As shown, in some optional embodiments, the suspension assembly 9 includes:

[0058] The upper side of the suspension bracket 91 is used to connect with the suspension point, and the lower side is provided with a connecting groove, which is fitted onto the arc-shaped sliding section 101.

[0059] Roller pin 92 passes through the connecting groove and is connected to the suspension bracket 91;

[0060] The roller 93 is rotatably mounted on the roller pin 92 and is used to support the lower side of the arc-shaped sliding section 101.

[0061] In this embodiment, the structure of the suspension assembly 9 is specifically described. The suspension assembly 9 includes a suspension bracket 91, a roller pin 92, and a roller 93. The upper side of the suspension bracket 91 is used to connect with the suspension point, and the lower side is provided with a connecting groove. The connecting groove is sleeved on the arc-shaped sliding section 101. The roller pin 92 passes through the connecting groove and is connected to the suspension bracket 91. The roller 93 is rotatably sleeved on the roller pin 92. The roller 93 is used to support the lower side of the arc-shaped sliding section 101. The roller 93 is perpendicular to the arc-shaped sliding section 101. The structure is simple and ensures the sliding effect of the suspension assembly 9.

[0062] like Figure 1 , Figure 2 and Figure 5 As shown, in some optional embodiments, the positioning boss 11 is an annular boss, and the mounting shell 1 has a central through hole 13 in the middle, the inner diameter of the central through hole 13 being less than or equal to the inner diameter of the positioning boss 11.

[0063] In this embodiment, the positioning boss 11 is an annular boss, and the mounting shell 1 has a central through hole 13 in the middle. The inner diameter of the central through hole 13 is less than or equal to the inner diameter of the positioning boss 11, which reduces the overall weight of the bolt tightening mechanism and is beneficial to overall weight reduction.

[0064] In summary, when using this bolt tightening mechanism, the driving gear 2 is located in the receiving cavity, and a first rotating shaft 51 is provided in the middle of the driving gear 2. The driving gear 2 is fixedly connected to the first rotating shaft 51. Multiple driven one-way gears 3 are located in the receiving cavity, and a second rotating shaft 52 is provided in the middle of the driven one-way gear 3. The second rotating shaft 52 is used to connect with the bolt to be tightened. The driven one-way gear 3 is unidirectionally slidably connected to the second rotating shaft 52. When the driving gear 2 drives the driven one-way gear 3 to rotate, the second rotating shaft 52 rotates synchronously. When the driving gear 2 is stationary and the second rotating shaft 52 rotates, the driven one-way gear 3 is stationary. That is, when the second rotating shaft 52 is rotated alone, it will not drive the outer driven one-way gear 3 to rotate. When the driving gear 2 drives the driven one-way gear 3 to rotate, the second rotating shaft 52 rotates synchronously. When the second rotating shaft 52 is rotated alone, it will not drive the outer driven one-way gear 3 to rotate. This allows for individual adjustment of some bolts to be tightened, improving the applicability of the bolt tightening mechanism. It solves the problem that in the prior art, a device for applying tightening torque can apply torque synchronously and evenly to the bolts to be tightened, but in special cases, such as when some bolts still need adjustment after tightening, it is difficult to adjust the bolts individually using this device, which has the problem of being unable to cope with special situations.

[0065] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0066] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0067] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A bolt tightening mechanism, characterized in that, include: The mounting housing (1) has a receiving cavity inside; A drive gear (2) is disposed in the receiving cavity. A first rotating shaft (51) is provided in the middle of the drive gear (2). The drive gear (2) is fixedly connected to the first rotating shaft (51). Multiple driven one-way gears (3) are disposed in the receiving cavity. A second rotating shaft (52) is provided in the middle of the driven one-way gear (3). The second rotating shaft (52) is used to connect with the bolt to be tightened. The driven one-way gear (3) and the second rotating shaft (52) are unidirectionally slidably connected. When the driving gear (2) drives the driven one-way gear (3) to rotate, the second rotating shaft (52) rotates synchronously. When the driving gear (2) is stationary and the second rotating shaft (52) rotates, the driven one-way gear (3) is stationary.

2. The bolt tightening mechanism as described in claim 1, characterized in that, The cavity is also provided with a transition gear (4), which meshes with the driving gear (2) and all driven one-way gears (3). When the driving gear (2) rotates, it drives the transition gear (4) to rotate, and the transition gear (4) drives all driven one-way gears (3) to rotate.

3. A bolt tightening mechanism as described in claim 1 or 2, characterized in that, Both ends of the first rotating shaft (51) and the second rotating shaft (52) extend out of the mounting shell (1) and are rotatably connected to the mounting shell (1). One end of the first rotating shaft (51) and the second rotating shaft (52) are used to connect to the bolt to be tightened, and the other end is used to connect to the air gun.

4. A bolt tightening mechanism as described in claim 3, characterized in that, The mounting housing (1) is provided with a dynamic torque sensor (6) on its outer side. The input shaft of the dynamic torque sensor (6) is connected to the first rotating shaft (51) or the second rotating shaft (52) to one end of the bolt to be tightened. The output shaft of the dynamic torque sensor (6) is connected to the bolt to be tightened.

5. A bolt tightening mechanism as described in claim 4, characterized in that, The outer side of the mounting shell (1) is also provided with a sensor bracket (7) corresponding to the dynamic torque sensor (6). The sensor bracket (7) includes an L-shaped bracket (71) and a reinforcing plate (72). The short plate of the L-shaped bracket (71) is connected to the mounting shell (1), and the long plate is connected to the corresponding dynamic torque sensor (6). The reinforcing plate (72) is disposed on the inner side of the L-shaped bracket (71) and is connected to the short plate and the long plate.

6. A bolt tightening mechanism as described in claim 2, characterized in that, The transition gear (4) has a gear hole in the middle and is located in the middle of the receiving cavity. The receiving cavity has a positioning boss (11). The positioning boss (11) has a first bearing (12) on its outer side. The inner side of the first bearing (12) is press-fitted with the outer side of the positioning boss (11), and the outer side is press-fitted with the gear hole wall of the transition gear (4).

7. A bolt tightening mechanism as described in claim 6, characterized in that, The mounting housing (1) is also provided with a suspension assembly (9), which is used to connect to the suspension point.

8. A bolt tightening mechanism as described in claim 7, characterized in that, The mounting housing (1) is also provided with a slide rail (10). The slide rail (10) includes an arc-shaped sliding section (101) and a connecting section (102) located at both ends of the arc-shaped sliding section (101). The connecting section (102) is connected to the mounting housing (1). The virtual center of the arc-shaped sliding section (101) coincides with the center of the transition gear (4). The suspension assembly (9) is slidably disposed on the arc-shaped sliding section (101). When the suspension assembly (9) is fixed on the suspension point, the bolt to be tightened connected to the driven one-way gear (3) can be replaced by adjusting the position of the suspension assembly (9) on the slide rail (10).

9. A bolt tightening mechanism as described in claim 8, characterized in that, The suspension assembly (9) includes: The upper side of the suspension bracket (91) is used to connect with the suspension point, and the lower side is provided with a connecting groove, which is sleeved on the arc-shaped sliding section (101); A roller pin (92) passes through the connecting groove and is connected to the suspension bracket (91); A roller (93) is rotatably mounted on the roller pin (92) and is used to support the underside of the arc-shaped sliding section (101).

10. A bolt tightening mechanism as described in claim 6, characterized in that, The positioning boss (11) is an annular boss, and the mounting shell (1) has a central through hole (13) in the middle. The inner diameter of the central through hole (13) is less than or equal to the inner diameter of the positioning boss (11).

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