Bolt tightening tool and bolt tightening machine

Abstract

The present application relates to a portable motorized tool, and discloses a bolt tightening tool and a bolt tightening machine. The bolt tightening tool may include: a housing, a first bevel gear, a second bevel gear, a third bevel gear, a first cylindrical gear, a second cylindrical gear, a first tool head, a second tool head, a first lever, a first torsion spring, and a plurality of limit blocks. The first bevel gear and the second bevel gear are respectively transmission-connected to the third bevel gear, and the rotating shaft of the first bevel gear or the second bevel gear is used to connect to a power source. The first cylindrical gear is coaxially fixedly connected to the first bevel gear, and the second cylindrical gear is coaxially fixedly connected to the second bevel gear. The first tool head may include first external teeth and a first sleeve. The first tool head is rotatably and slidably connected to the housing, and is transmission-connected to the first cylindrical gear. The second tool head may include a similar mechanical structure and transmission structure. The first torsion spring is used to drive the first tool head to slide toward the second tool head.

Description

Technical Field

[0001] The present application relates to a portable motor tool, and in particular to a bolt tightening tool and a bolt tightening machine. Background Art

[0002] At present, when installing power equipment, there are high requirements for installation time. In order to ensure life and production, it is required to increase the installation speed as much as possible to meet the use needs as soon as possible. However, during the assembly process, especially in the distribution box and grounding box, the bolts and nuts are one outside and one inside, which makes it impossible to use power tools on both sides at the same time. Usually two open-end wrenches are used for tightening, which takes a long time to install. Due to the large number of bolts and nuts, the assembly speed is seriously affected. Summary of the Invention

[0003] The technical problem to be solved by this application is that in scenarios with limited working space, bolts and nuts can only be assembled manually, and the assembly speed is too slow.

[0004] In order to solve the above technical problems, the present application provides a bolt tightening tool and a bolt tightening machine.

[0005] The first aspect of the present application provides a bolt tightening tool, the bolt tightening tool comprising: a housing; a first bevel gear; a second bevel gear; a third bevel gear, the first bevel gear and the second bevel gear are respectively connected to the third bevel gear in a transmission manner, the first bevel gear, the second bevel gear and the third bevel gear are respectively rotatably connected to the housing through a rotating shaft, the rotating shaft of the first bevel gear or the rotating shaft of the second bevel gear is an output shaft, and the output shaft is used to connect a power source; a first cylindrical gear, the first cylindrical gear is coaxially fixedly connected to the first bevel gear; the second cylindrical gear, the second cylindrical gear is coaxially fixedly connected to the second bevel gear; a first tool head, the first tool head includes first external teeth and a first sleeve, the first sleeve is embedded in the interior of the first external teeth, the first tool head is rotatably connected to the housing, and the first tool head is slidably connected to the housing along the axial direction of the rotating shaft, the first tool head The first tool head is provided with a first annular groove through a transmission connection with the first cylindrical gear through an even number of cylindrical gears; the second tool head, the second tool head includes second external teeth and a second sleeve, the second sleeve is embedded in the interior of the second external teeth, and the transmission structure of the second tool head is the same as the transmission structure of the first tool head, so that the second tool head is coaxial with the first tool head; the first shift rod, the first shift rod is rotatably connected to the outer shell, the rotation axis of the first shift rod is perpendicular to the rotation axis of the first tool head, and the head end of the first shift rod extends into the first annular groove; the first torsion spring, the first torsion spring is connected between the first shift rod and the outer shell, the first torsion spring is used to provide a rotational force of the first shift rod, the rotational force causes the head end of the first shift rod to contact the side of the first annular groove, driving the first tool head to slide toward the second tool head; a plurality of limit blocks, a plurality of limit blocks are used to limit the displacement of the first tool head relative to the outer shell.

[0006] In one embodiment, the bolt tightening tool further includes a second lever, a second torsion spring, a first pull rod and a second pull rod; the second tool head is slidably connected to the housing along the axial direction of the rotation axis, and the second tool head is provided with a second annular groove; the second lever is rotatably connected to the housing, the rotation axis of the second lever is perpendicular to the rotation axis of the second tool head, and the head end of the second lever extends into the second annular groove; the second torsion spring is connected between the second lever and the housing, the second torsion spring is used to provide a rotational force for the second lever, the rotational force causes the head end of the second lever to contact the side surface of the second annular groove, driving the second tool head to slide toward the first tool head; a plurality of limit blocks are also used to limit the displacement of the second tool head relative to the housing; the head end of the first pull rod is rotatably connected to the tail end of the first lever, the head end of the second pull rod is rotatably connected to the tail end of the second lever, and the tail end of the first pull rod is fixedly connected to the tail end of the second pull rod as an operating end. When the operating end is pulled, the first tool head and the second tool head are slid at the same time to increase the distance between the first tool head and the second tool head.

[0007] In another embodiment, the bolt tightening tool also includes a sliding rod, a slider and a trigger. A handle is provided at the bottom of the shell, and the rotating shaft of the first bevel gear is transmission-connected to the power source; the slider is slidingly connected to the sliding rod, the sliding rod is placed horizontally, and the tail end of the first pull rod and the tail end of the second pull rod are respectively fixedly connected to the two ends of the sliding rod; the head end of the trigger is rotatably connected to the slider, and the middle part of the trigger is rotatably connected to the shell. When the tail end of the trigger is subjected to an extrusion force directed to the handle, it drives the head end of the trigger to swing, causing the sliding rod to move downward, while pulling the first pull rod and the second pull rod.

[0008] In another embodiment, the bolt tightening tool also includes a sliding rod, a slider, a trigger and a transfer rod. A handle is provided on the left side of the shell, and the rotating shaft of the third bevel gear is transmission-connected to the power source; the slider is slidingly connected to the sliding rod, the sliding rod is placed horizontally, and the tail end of the first pull rod and the tail end of the second pull rod are respectively fixedly connected to the two ends of the sliding rod; the head end of the trigger is rotatably connected to the tail end of the transfer rod, the middle part of the transfer rod is rotatably connected to the shell, the head end of the transfer rod is rotatably connected to the slider, and the middle part of the trigger is rotatably connected to the shell. When the tail end of the trigger is subjected to an extrusion force directed to the handle, it drives the head end of the trigger to swing, and then drives the head end of the transfer rod to swing, causing the sliding rod to move downward, while pulling the first pull rod and the second pull rod.

[0009] In one embodiment, the bolt tightening tool further includes a clutch, which is installed between the output shaft and the power source.

[0010] In another embodiment, the bolt tightening tool further includes a synchronization rod, the power source is an electric wrench or a pneumatic wrench, one end of the synchronization rod is connected to the head end of the trigger, and the other end of the synchronization rod is connected to the output shaft and the trigger mechanism of the electric wrench or the pneumatic wrench.

[0011] In yet another embodiment, the bolt tightening tool further comprises a connecting piece, and the connecting piece is used to connect the housing to a base of an electric wrench or a pneumatic wrench.

[0012] In one embodiment, a retaining ring is provided on the outside of the second tool head, the inner diameter of the retaining ring is smaller than the inner diameter of the second sleeve, the interior of the second sleeve is used to fill the nut, and the retaining ring is used to prevent the nut from falling off from the second sleeve; the first sleeve is a hollow structure, and the first sleeve is used to pass the bolt.

[0013] In another embodiment, threaded holes are respectively provided in the radial direction of the first outer teeth and the radial direction of the second outer teeth, and the threaded holes are used to install confidential screws, and the confidential screws are used to fix the first sleeve and the second sleeve.

[0014] In the second aspect of the present application, a bolt tightening machine is provided, which includes: the bolt tightening tool provided in the first aspect of the present application; a motor, which is transmission-connected to the output shaft; a power supply, which is used to supply power to the motor; a trigger switch, which is used to control the on and off of the power supply and the motor; and a casing, which is fixedly connected to the outer shell.

[0015] Compared with the prior art, the bolt tightening tool and bolt tightening machine of the embodiment of the present application have the following advantages:

[0016] In the embodiment of the present application, three bevel gears form a coaxial, counter-rotating transmission, enabling the first and second tool heads on either side to rotate coaxially and counter-rotating, thereby enabling simultaneous tightening of bolts and nuts. Because the first tool head has an elastic structure, the first lever can consistently apply force to the first tool head approaching the second tool head. Therefore, when the first tool head is pulled apart and aligned with the bolt and nut, respectively, the torsion spring is released, allowing the first and second tool heads to clamp the bolt and nut. Upon activation, the first and second sleeves in the two tool heads will respectively engage the bolt and nut. Since simultaneous tightening is possible and can be powered by a power source, manual assembly using two wrenches is unnecessary, achieving rapid assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of a bolt tightening scenario exemplarily shown in an embodiment of the present application.

[0018] Figure 2 It is a structural schematic diagram of a bolt tightening tool exemplarily shown in an embodiment of the present application.

[0019] Figure 3 This is a schematic diagram of the coordination between a bolt tightening tool and a power source, exemplarily shown in an embodiment of the present application.

[0020] Figure 4This is another schematic diagram of the coordination between a bolt tightening tool and a power source exemplarily shown in an embodiment of the present application.

[0021] Figure 5 It is a structural schematic diagram of a bolt tightening tool exemplarily shown in an embodiment of the present application.

[0022] Figure 6 This is a schematic diagram of the linkage structure of a bolt tightening tool and a power source, exemplified by an embodiment of the present application.

[0023] Figure 7 This is a structural frame diagram of a bolt tightening machine exemplarily shown in an embodiment of the present application.

[0024] Reference numerals:

[0025] 10. Bolt tightening tool, 101. Housing, 102. First bevel gear, 103. Second bevel gear, 104. Third bevel gear, 100. Output shaft, 20. Power source, 105. First cylindrical gear, 106. Second cylindrical gear, 107. First tool head, 1071. First external tooth, 1072. First sleeve, 1073. First annular groove, 108. Second tool head, 1081. Second external tooth, 1082. Second sleeve, 1083. Second annular groove, 10831. Side of the second annular groove, 109. First lever, 110. First torsion spring, 111. Limit block, 112. Second lever, 113. Second torsion spring, 114. First pull rod, 115. Second pull rod, 116. Slide rod, 117. Slider, 118. Trigger, 1011. Handle, 119. Adapter rod, 120. Clutch, 121. Synchronizing rod, 122. Connector, 1084. Retaining ring, 123. Threaded hole, 124. Confidential screw, 125. An even number of cylindrical gears, 1. A bolt tightening machine, 2. Bolt, 3. Nut, 30. Motor, 40. Power supply, 50. Trigger switch, 60. Casing. DETAILED DESCRIPTION

[0026] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In the description of this application, it should be understood that the terms "above" and "left side" are used in this application to describe the positional relationship in the drawings of this application. When adopting the solution of any embodiment of this application, only the nouns describing the orientation are changed, which does not affect the implementation of the solution of this application and falls within the scope of protection of this application. The "inside" and "outside" in this application are based on the main structure. For example, the inside of the first tool head can refer to the side of the first tool head close to the second tool head, and the outside of the first tool head can refer to the side of the first tool head away from the second tool head.

[0028] When installing electrical equipment, there are high requirements for installation time. In order to ensure life and production, it is required to increase the installation speed as much as possible to meet the usage needs as soon as possible.

[0029] The inventors realized during field work that nuts and bolts took up the vast majority of the time during the installation process, and that this repetitive labor could not be performed using automated tools due to the inconvenience of operation.

[0030] like Figure 1 As shown, the nut and bolt are placed one outside and one inside, which makes it impossible to use power tools on both sides at the same time. Usually, two open-end wrenches are used for tightening, which takes a long time to install. Due to the large number of bolts and nuts, the assembly speed is seriously affected.

[0031] In this regard, Figure 2 As shown, the present application provides a bolt tightening tool 10, which may include: a housing 101, a first bevel gear 102, a second bevel gear 103, a third bevel gear 104, a first cylindrical gear 105, a second cylindrical gear 106, a first tool head 107, a second tool head 108, a first lever 109, a first torsion spring 110 and a number of limit blocks 111.

[0032] Among them, the first bevel gear 102 and the second bevel gear 103 are respectively connected to the third bevel gear 104 in transmission mode, and the first bevel gear 102, the second bevel gear 103 and the third bevel gear 104 are respectively rotatably connected to the housing 101 through rotating shafts. The rotating shaft of the first bevel gear 102 or the rotating shaft of the second bevel gear 103 is the output shaft 100, and the output shaft 100 is used to connect to the power source 20.

[0033] The first cylindrical gear 105 is coaxially fixedly connected to the first bevel gear 102 , and the second cylindrical gear 106 is coaxially fixedly connected to the second bevel gear 103 .

[0034] The first tool head 107 may include first external teeth 1071 and a first sleeve 1072. The first sleeve 1072 is embedded in the first external teeth 1071. The first tool head 107 is rotatably connected to the outer shell 101, and the first tool head 107 is slidably connected to the outer shell 101 along the axial direction of the rotating shaft. The first tool head 107 is transmission-connected to the first cylindrical gear 105 through an even number of cylindrical gears 125. The first tool head 107 is provided with a first annular groove 1073.

[0035] Correspondingly, the second tool head 108 may include second outer teeth 1081 and a second sleeve 1082. The second sleeve 1082 is embedded in the second outer teeth 1081. The transmission structure of the second tool head 108 is the same as the transmission structure of the first tool head 107, so that the second tool head 108 is coaxial with the first tool head 107.

[0036] A first lever 109 is rotatably connected to the housing 101. The rotation axis of the first lever 109 is perpendicular to the rotation axis of the first tool head 107, and the head end of the first lever 109 extends into the first annular groove 1073. A first torsion spring 110 is connected between the first lever 109 and the housing 101. The first torsion spring 110 is used to provide a rotational force for the first lever 109. This rotational force causes the head end of the first lever 109 to contact the side of the first annular groove 1073, driving the first tool head 107 to slide toward the second tool head 108. A plurality of limit blocks 111 are used to limit the displacement of the first tool head 107 relative to the housing 101.

[0037] In terms of mechanical design, the clever combination of three bevel gears achieves a coaxial, reverse-rotating transmission effect. For example, taking the first tool head 107 as an example, since there is always an even number of cylindrical gears 125 between the first tool head 107 and the first cylindrical gear 105 (e.g., 0, 2, 4, etc.), the rotation directions of the first tool head 107 and the first cylindrical gear 105 are always opposite. Similarly, the rotation directions of the second tool head 108 and the second cylindrical gear 106 are also always opposite. Since the first cylindrical gear 105 and the first bevel gear 102 rotate coaxially, the second cylindrical gear 106 and the second bevel gear 103 rotate coaxially, and the first bevel gear 102 and the second bevel gear 103 rotate in opposite directions, the first tool head 107 and the second tool head 108 always rotate in opposite directions.

[0038] This transmission method directly gives the first tool head 107 and the second tool head 108 on both sides the characteristic of coaxial counter-rotation. This characteristic enables the bolts 2 and nuts 3 on both sides of the fastener to be tightened or loosened at the same time, thereby enabling rapid assembly in conjunction with the power source 20.

[0039] During use, the tool head is equipped with a first lever 109, which constantly forces it toward the second tool head 108. Once the first tool head 107 is pulled apart and aligned with the second tool head 108, respectively, the torsion spring is released, automatically clamping the bolt 2 and nut 3. Furthermore, the first and second sleeves 1072, 1082, respectively, of the two tool heads ensure precise engagement of the bolt 2 and nut 3 during rotation, ensuring accurate and stable operation.

[0040] The device offers significant advantages in terms of assembly efficiency and method. Conventional assembly of bolt 2 and nut 3 requires manual operation using two wrenches, a cumbersome and inefficient process. However, this device can simultaneously tighten bolt 2 and nut 3 and can be driven by power source 20. This not only eliminates the traditional complex manual operation mode, significantly reducing labor costs and labor intensity, but also reduces alignment time and assembly time significantly, achieving rapid assembly. The device possesses extremely high practical value and broad application prospects in various scenarios requiring the assembly of bolts 2 and nuts 3.

[0041] The opposite torques of the first tool head 107 and the second tool head 108 prevent the bolt tightening tool 10 from generating any additional torque in the rotation plane of the bolt 2 , thus minimizing wear on the machine and making it easier to use.

[0042] At the same time, since the rotating shafts of the three bevel gears can be led out of the housing 101 and the movements of the three bevel gears are always linked, the rotating shaft of any bevel gear can be used as the output shaft 100 to obtain power from the power source 20 .

[0043] It is understandable that the power source 20 in the present application may be an electric wrench or a pneumatic wrench, or may be other power sources 20 that replace human power.

[0044] It is understood that in the embodiment of the present application, the length of the first external teeth 1071 or the second external teeth 1081 can be shorter than the length of the tool head in which they are located, so that the cylindrical gear mating with the tool head can also serve as the stopper 111. Correspondingly, corresponding protrusions can also be provided on the housing 101 to serve as the stopper 111, which will not be further described in this application.

[0045] In one embodiment of the present application, in order to increase the clamping range, as shown in FIG. Figure 2 As shown, the bolt tightening tool 10 may further include a second lever 112 , a second torsion spring 113 , a first pull rod 114 and a second pull rod 115 .

[0046] The second tool head 108 is slidably connected to the housing 101 along the axis of rotation. A second annular groove 1083 is defined in the second tool head 108. A second lever 112 is rotatably connected to the housing 101. The axis of rotation of the second lever 112 is perpendicular to that of the second tool head 108, and the tip of the second lever 112 extends into the second annular groove 1083. A second torsion spring 113 is connected between the second lever 112 and the housing 101. This provides a rotational force for the second lever 112, which causes the tip of the second lever 112 to contact the side surface 10831 of the second annular groove, driving the second tool head 108 to slide toward the first tool head 107. A plurality of stoppers 111 also limit the displacement of the second tool head 108 relative to the housing 101.

[0047] Among them, the head end of the first pull rod 114 is rotatably connected to the tail end of the first shift rod 109, the head end of the second pull rod 115 is rotatably connected to the tail end of the second shift rod 112, and the tail end of the first pull rod 114 and the tail end of the second pull rod 115 are fixedly connected as an operating end. When the operating end is pulled, the first tool head 107 and the second tool head 108 are slid at the same time to increase the distance between the first tool head 107 and the second tool head 108.

[0048] Through the above solution, the first pull rod 114 and the second pull rod 115 are operated synchronously to achieve a fast and convenient opening and closing action. The tail end of the first pull rod 114 and the tail end of the second pull rod 115 can be directly fixed together or indirectly fixed together through other components.

[0049] In another embodiment of the present application, Figure 3 As shown, the bolt tightening tool 10 may further include a slide bar 116 , a slider 117 and a trigger 118 . A handle 1011 is provided at the bottom of the housing 101 . The rotating shaft of the first bevel gear 102 is in transmission connection with the power source 20 .

[0050] Slider 117 is slidably connected to slide bar 116, which is positioned horizontally. The tail ends of first pull rod 114 and second pull rod 115 are fixedly connected to the ends of slide bar 116. The head end of trigger 118 is rotatably connected to slider 117, and the middle portion of trigger 118 is rotatably connected to housing 101. When the tail end of trigger 118 is subjected to a compressive force directed toward handle 1011, the head end of trigger 118 is driven to swing, causing slide bar 116 to move downward, simultaneously pulling first pull rod 114 and second pull rod 115.

[0051] Through the above scheme, the trigger 118 is used to operate the two pull rods, which can further improve the usability. After placing the bolts 2 and nuts 3, it is only necessary to pull the trigger 118 to achieve clamping, and then start the power source 20 to complete the assembly. Since the form of the trigger 118 is similar to the switch of the usual power source 20, it is easier to get started and reduces the learning cost.

[0052] The structures of the handle 1011 and the trigger 118 enable the bolt tightening tool 10 to be better gripped.

[0053] In another embodiment of the present application, the rotating shaft of another bevel gear can also be used as a power source, such as Figure 4 As shown, the bolt tightening tool 10 may further include a slide bar 116 , a slider 117 , a trigger 118 and a transfer rod 119 . A handle 1011 is provided on the left side of the housing 101 . The rotating shaft of the third bevel gear 104 is in transmission connection with the power source 20 .

[0054] Slider 117 is slidably connected to slide bar 116, which is positioned horizontally. The tail ends of first pull rod 114 and second pull rod 115 are respectively fixedly connected to the ends of slide bar 116. The head end of trigger 118 is rotatably connected to the tail end of adapter rod 119, the middle portion of adapter rod 119 is rotatably connected to housing 101, the head end of adapter rod 119 is rotatably connected to slider 117, and the middle portion of trigger 118 is rotatably connected to housing 101. When the tail end of trigger 118 is subjected to a squeezing force directed toward handle 1011, it drives the head end of trigger 118 to swing, thereby driving the head end of adapter rod 119 to swing, causing slide bar 116 to move downward, and simultaneously pulling first pull rod 114 and second pull rod 115.

[0055] Even if the position of the power transmission is changed, it will not affect the implementation of the solution. By adding the adapter rod 119 , the rotation of the trigger 118 can be reasonably converted into the downward movement of the first pull rod 114 and the second pull rod 115 .

[0056] On the basis of the above two embodiments, in order to better ensure the sliding stability of the slider 117 and the slide rod 116, a double-rod slide rod 116 and a corresponding double-hole slider 117 can be used to reduce the possibility of the slider 117 hitting the wall and wearing.

[0057] In one embodiment, Figure 3 or Figure 4 As shown, the bolt tightening tool 10 further includes a clutch 120 , which is installed between the output shaft 100 and the power source 20 .

[0058] The clutch 120, installed between the output shaft 100 and the power source 20, plays a key role in torque control in the bolt tightening tool 10. When the power source 20 outputs torque, the clutch 120 transmits and disconnects the torque. During the tightening process, adjusting the clutch 120 precisely controls the torque transmitted to the output shaft 100 and, in turn, the torque applied to the tool head.

[0059] For example, when tightening bolts 2 of different specifications, the required tightening torques for each bolt 2 vary. In this case, the clutch 120 can be used to adjust the transmitted torque, preventing excessive torque from causing thread slippage or damage to the bolt 2, and preventing insufficient torque from causing a loose tightening of the bolt 2. Furthermore, upon reaching the set torque value, the clutch 120 can promptly cut off the torque output of the power source 20, ensuring the accuracy and safety of the bolt 2 tightening operation, further enhancing the reliability and practicality of the entire bolt tightening tool 10.

[0060] In another embodiment of the present application, Figure 6As shown, the bolt tightening tool 10 may further include a synchronization rod 121, the power source 20 is an electric wrench or a pneumatic wrench, one end of the synchronization rod 121 is connected to the head end of the trigger 118, and the other end of the synchronization rod 121 is connected to the output shaft 100 and the trigger mechanism of the electric wrench or the pneumatic wrench.

[0061] When power source 20 is an electric wrench or a pneumatic wrench, since the electric wrench or pneumatic wrench has its own trigger mechanism, the states of the trigger mechanism and trigger 118 are synchronized via a synchronization rod 121: when the trigger mechanism is raised, trigger 118 is pressed, power source 20 is deactivated, and the distance between first tool head 107 and second tool head 108 increases in preparation for clamping. When the trigger mechanism is pressed, trigger 118 is raised, the distance between first tool head 107 and second tool head 108 decreases in preparation for clamping, and power source 20 begins to output power, starting to tighten bolt 2 and nut 3.

[0062] Furthermore, the bolt tightening tool 10 further includes a connecting member 122 , which is used to connect the housing 101 to a base of an electric wrench or a pneumatic wrench.

[0063] The connecting member 122 serves as a reinforcement, making the linkage between the trigger 118 and the trigger mechanism more effective.

[0064] In one embodiment of the present application, Figure 5 As shown, a retaining ring 1084 is provided on the outside of the second tool head 108. The inner diameter of the retaining ring 1084 is smaller than the inner diameter of the second sleeve 1082. The interior of the second sleeve 1082 is used to fill the nut 3, and the retaining ring 1084 is used to prevent the nut 3 from falling out of the second sleeve 1082. The first sleeve 1072 is a hollow structure and is used to pass the bolt 2.

[0065] With this structure, in the preparatory stage, the nut 3 can be directly placed in the second sleeve 1082 without manual alignment in advance. Accordingly, the bolt 2 can be directly put in from the outside of the hollow first sleeve 1072, thereby further improving the assembly speed.

[0066] In this application, if Figure 5 As shown, threaded holes 123 are respectively provided in the radial direction of the first outer teeth 1071 and the second outer teeth 1081. The threaded holes 123 are used to install confidential screws 124, which are used to fix the first sleeve 1072 and the second sleeve 1082. The confidential screws 124 provide a way to disassemble the sleeves, making them replaceable to suit different working scenarios.

[0067] Correspondingly, such as Figure 7As shown, the present application further provides a bolt tightening machine 1 , which may include: the bolt tightening tool 10 in any embodiment, a motor 30 , a trigger switch 50 , a power supply 40 and a housing 60 .

[0068] The motor 30 is transmission-connected to the output shaft 100 , the power supply 40 is used to supply power to the motor 30 , the trigger switch 50 is used to control the on / off of the power supply 40 and the motor 30 , and the housing 60 is fixedly connected to the outer shell 101 .

[0069] The bolt tightening machine 1 also has the embodiments and beneficial effects of the bolt tightening tool 10 , which will not be described in detail.

[0070] Compared with the prior art, the bolt tightening tool 10 and the bolt tightening machine 1 of the embodiment of the present application have the following advantages:

[0071] In this embodiment, three bevel gears form a coaxial, counter-rotating transmission, enabling the first and second tool heads 107, 108 on either side to rotate coaxially and counter-rotating, thereby enabling simultaneous tightening of the bolt 2 and nut 3. Because the first tool head 107 has an elastic structure, the first lever 109 constantly applies force to the first tool head 107, urging it to approach the second tool head 108. Therefore, when the first tool head 107 is pulled apart and aligned with the bolt 2 and nut 3, respectively, the torsion spring is released, allowing the first and second tool heads 107, 108 to clamp the bolt 2 and nut 3. Upon activation, the first and second sleeves 107, 1082 in the two tool heads respectively engage the bolt 2 and nut 3. Since simultaneous tightening is possible, and with the aid of a power source 20, manual assembly using two wrenches is unnecessary, achieving rapid assembly.

[0072] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.

Claims

1. A bolt tightening tool, characterized in that: The bolt tightening tool (10) comprises: A housing (101), wherein a handle (1011) is provided at the bottom of the housing (101); First bevel gear (102); Second bevel gear (103); a third bevel gear (104), the first bevel gear (102) and the second bevel gear (103) are respectively connected to the third bevel gear (104) in a transmission manner, the first bevel gear (102), the second bevel gear (103) and the third bevel gear (104) are respectively rotatably connected to the housing (101) via a rotating shaft, the rotating shaft of the first bevel gear (102) is an output shaft (100), and the output shaft (100) is used to connect an electric wrench or a pneumatic wrench; a first cylindrical gear (105), the first cylindrical gear (105) being coaxially fixedly connected to the first bevel gear (102); A second cylindrical gear (106), the second cylindrical gear (106) being coaxially fixedly connected to the second bevel gear (103); a first tool head (107), the first tool head (107) comprising first external teeth (1071) and a first sleeve (1072), the first sleeve (1072) being embedded in the interior of the first external teeth (1071), the first tool head (107) being rotatably connected to the housing (101), and the first tool head (107) being slidably connected to the housing (101) along the axial direction of the rotation axis, the first tool head (107) being transmission-connected to the first cylindrical gear (105) via an even number of cylindrical gears (125), and the first tool head (107) being provided with a first annular groove (1073); a second tool head (108), wherein the second tool head (108) comprises second outer teeth (1081) and a second sleeve (1082), wherein the second sleeve (1082) is embedded in the interior of the second outer teeth (1081), and the transmission structure of the second tool head (108) is the same as the transmission structure of the first tool head (107), so that the second tool head (108) and the first tool head (107) are coaxial; the second tool head (108) is slidably connected to the housing (101) along the axial direction of the rotating shaft, and the second tool head (108) is provided with a second annular groove (1083); a first shift rod (109), the first shift rod (109) being rotatably connected to the housing (101), the rotation axis of the first shift rod (109) being perpendicular to the rotation axis of the first tool head (107), and the first end of the first shift rod (109) extending into the first annular groove (1073); a first torsion spring (110), the first torsion spring (110) being connected between the first lever (109) and the housing (101), the first torsion spring (110) being used to provide a rotational force to the first lever (109), the rotational force causing the first end of the first lever (109) to come into contact with the side surface of the first annular groove, thereby driving the first tool head (107) to slide toward the second tool head (108); a second shift rod (112), the second shift rod (112) being rotatably connected to the housing (101), the rotation axis of the second shift rod (112) being perpendicular to the rotation axis of the second tool head (108), and the head end of the second shift rod (112) extending into the second annular groove (1083); a second torsion spring (113), the second torsion spring (113) being connected between the second lever (112) and the housing (101), the second torsion spring (113) being used to provide a rotational force for the second lever (112), the rotational force causing the head end of the second lever (112) to come into contact with the side surface (10831) of the second annular groove, thereby driving the second tool head (108) to slide toward the first tool head (107); a plurality of limit blocks (111), wherein the plurality of limit blocks (111) are used to limit the displacement of the first tool head (107) relative to the housing (101), and the plurality of limit blocks (111) are also used to limit the displacement of the second tool head (108) relative to the housing (101); a first pull rod (114), wherein the head end of the first pull rod (114) is rotatably connected to the tail end of the first shift rod (109); a second pull rod (115), wherein the head end of the second pull rod (115) is rotatably connected to the tail end of the second lever (112), and the tail end of the first pull rod (114) is fixedly connected to the tail end of the second pull rod (115) as an operating end, and when the operating end is pulled, the first tool head (107) and the second tool head (108) are slid simultaneously to increase the distance between the first tool head (107) and the second tool head (108); Slider (116); A slider (117), wherein the slider (117) is slidably connected to the slide rod (116), the slide rod (116) is placed horizontally, and the tail end of the first pull rod (114) and the tail end of the second pull rod (115) are fixedly connected to the two ends of the slide rod (116); A trigger (118), wherein the head end of the trigger (118) is rotatably connected to the slider (117), and the middle portion of the trigger (118) is rotatably connected to the housing (101). When the end of the trigger (118) is subjected to a squeezing force directed toward the handle (1011), the head end of the trigger (118) is driven to swing, causing the slider (116) to move downward, while pulling the first pull rod (114) and the second pull rod (115); A synchronization rod (121), one end of which is connected to the head end of the trigger (118), and the other end of which is connected to the trigger mechanism of the electric wrench or the pneumatic wrench.

2. The bolt tightening tool according to claim 1, characterized in that: The bolt tightening tool (10) further comprises a clutch (120), wherein the clutch (120) is installed between the output shaft (100) and the electric wrench or between the output shaft (100) and the pneumatic wrench.

3. The bolt tightening tool according to claim 2, characterized in that: The bolt tightening tool (10) further comprises a connecting member (122), wherein the connecting member (122) is used to connect the housing (101) to a base of the electric wrench or the pneumatic wrench.

4. The bolt tightening tool according to claim 1, wherein: A retaining ring (1084) is provided on the outside of the second tool head (108), the inner diameter of the retaining ring (1084) is smaller than the inner diameter of the second sleeve (1082), the interior of the second sleeve (1082) is used to fill the nut (3), and the retaining ring (1084) is used to prevent the nut (3) from falling off from the second sleeve (1082); The first sleeve (1072) is a hollow structure, and the first sleeve (1072) is used to pass the bolt (2).

5. The bolt tightening tool according to claim 1, characterized in that: A threaded hole (123) is provided in the radial direction of the first outer tooth (1071) and the radial direction of the second outer tooth (1081), respectively. The threaded hole (123) is used to install a confidential screw (124), and the confidential screw (124) is used to fix the first sleeve (1072) and the second sleeve (1082).

6. A bolt tightening machine, characterized in that: The bolt tightening machine comprises: The bolt tightening tool according to any one of claims 1 to 5; An electric motor (30), the electric motor (30) being drivingly connected to the output shaft (100); a power supply (40), the power supply (40) being used to supply power to the motor (30); a trigger switch (50), the trigger switch (50) being used to control the on / off of the power source (40) and the motor (30); A casing (60), wherein the casing (60) is fixedly connected to the outer shell (101).

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