Bolt fastening tool and bolt fastening machine

Abstract

The invention relates to a portable maneuvering tool, and discloses a bolt fastening tool and a bolt fastening machine, and the bolt fastening tool can comprise a shell, 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 deflector rod, a first torsion spring and a plurality of limiting blocks. The first bevel gear and the second bevel gear are in transmission connection with the third bevel gear, and a rotating shaft of the first bevel gear or the second bevel gear is used for being connected with a power source. The first cylindrical gear is coaxially and fixedly connected with the first bevel gear, and the second cylindrical gear is coaxially and fixedly connected with the second bevel gear. The first tool head can comprise first outer teeth and a first sleeve, the first tool head is rotatably and slidably connected with the shell, the first tool head is in transmission connection with the first cylindrical gear, and the second tool head can comprise similar mechanical structures and transmission structures. The first torsional spring is used for driving the first tool head to slide towards the second tool head.

Description

Technical Field

[0001] The present application relates to a portable motor tool, 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 the present application is that in scenarios where the working space is limited, 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, which includes: 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; a 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 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, and 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, 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 and the first tool head are coaxial; the first lever, the first lever is rotatably connected to the outer shell, the rotation axis of the first lever is perpendicular to the rotation axis of the first tool head, and the head end of the first lever extends into the first annular groove; the first torsion spring, the first torsion spring is connected between the first lever and the outer shell, the first torsion spring is used to provide a rotational force for the first lever, the rotational force causes the head end of the first lever 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, the 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 also 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 shell 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 shell, 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 shell, and the second torsion spring is used to provide a rotational force for the second lever, and the rotational force causes the head end of the second lever to contact the side 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 first tool head relative to the shell; 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, and 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 outer shell, and the rotating shaft of the first bevel gear is transmission-connected to the power source; the slider is slidably 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 first 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 outer shell. When the tail end of the trigger is subjected to the squeezing force directed to the handle, the head end of the trigger is driven 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 slidably connected to the sliding rod, the sliding rod is horizontally placed, 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 first 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 the squeezing 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, so that the sliding rod moves downward, and at the same time pulls the first pull rod and the second pull rod.

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

[0010] In another embodiment, the bolt tightening tool also 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 another embodiment, the bolt tightening tool further includes a connecting member for connecting the housing to the base of an electric wrench or a pneumatic wrench.

[0012] In one embodiment, a retaining ring is provided on the outer side of the second tool head. The inner diameter of the retaining ring is smaller than the inner diameter of the second sleeve. The inside of the second sleeve is for filling with nuts, and the retaining ring is for preventing the nuts from falling out of the second sleeve. The first sleeve is a hollow structure and is for passing through the bolt.

[0013] In yet another embodiment, threaded holes are respectively provided in the radial directions of the first external teeth and the second external teeth. The threaded holes are for installing security screws, and the security screws are for fixing the first sleeve and the second sleeve.

[0014] In the second aspect of the present application, a bolt tightening machine is provided. The bolt tightening machine includes: the bolt tightening tool provided in the first aspect of the present application; a motor, the motor being in transmission connection with the output shaft; a power source for supplying power to the motor; a trigger switch for controlling the on-off of the power source and the motor; and a machine shell fixedly connected to the housing.

[0015] Compared with the prior art, the bolt tightening tool and the bolt tightening machine in the embodiments of the present application have the following beneficial effects: In the embodiments of the present application, a coaxial reverse transmission is formed by three bevel gears, so that the first tool heads and the second tool heads on both sides have the coaxial reverse rotation characteristics. Therefore, bolts and nuts can be tightened simultaneously. Since the first tool head has an elastic structure, the first lever can always apply a force to the first tool head to approach the second tool head. Therefore, after pulling apart the first tool head and aligning the first tool head and the second tool head with the bolt and the nut respectively, the torsion spring can be released so that the first tool head and the second tool head clamp the bolt and the nut. After starting to rotate, the first sleeve and the second sleeve in the two tool heads will respectively fit over the bolt and the nut. Since it can be tightened simultaneously and the power source can be utilized, it is not necessary to manually assemble with two wrenches, achieving the purpose of rapid assembly. Description of the Drawings

[0016] Figure 1 is a schematic diagram of a bolt tightening scenario exemplarily shown in the embodiments of the present application.

[0017] Figure 2 is a schematic structural diagram of a bolt tightening tool exemplarily shown in the embodiments of the present application.

[0018] Figure 3 is a schematic diagram of the cooperation between a bolt tightening tool and a power source exemplarily shown in the embodiments of the present application.

[0019] Figure 4 is a schematic diagram of the cooperation between another bolt tightening tool and a power source exemplarily shown in the embodiments of the present application.

[0020] Figure 5 It is a schematic structural diagram of a bolt tightening tool exemplarily shown in an embodiment of the present application.

[0021] Figure 6 It is a schematic diagram of a linkage structure between a bolt tightening tool and a power source exemplarily shown in an embodiment of the present application.

[0022] Figure 7 It is a structural framework diagram of a bolt tightening machine exemplarily shown in an embodiment of the present application.

[0023] Reference numerals: 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 teeth, 1072. First sleeve, 1073. First annular groove, 108. Second tool head, 1081. Second external teeth, 1082. Second sleeve, 1083. Second annular groove, 10831. Side surface 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 bar, 117. Slide block, 118. Trigger, 1011. Handle, 119. Adapter rod, 120. Clutch, 121. Synchronizing rod, 122. Connecting piece, 1084. Retaining ring, 123. Threaded hole, 124. Confidential screw, 125. Even number of cylindrical gears, 1. A bolt tightening machine, 2. Bolt, 3. Nut, 30. Electric motor, 40. Power supply, 50. Trigger switch, 60. Machine housing. Detailed implementation manners

[0024] The following will further describe in detail the specific implementation manners of the present application in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present application, but are not used to limit the scope of the present application.

[0025] In the description of the present application, it should be understood that the terms "above", "left side", etc. used in the present application are described based on the positional relationship in the drawings of the present application. When adopting the solution of any embodiment of the present application, only changing the nouns describing the orientation does not affect the implementation of the solution of the present application and also falls within the protection scope of the present application. The "inner side" and "outer side" in the present application are based on the main structure. For example, the inner side of the first tool head may refer to the side of the first tool head close to the second tool head, and the outer side of the first tool head may refer to the side of the first tool head away from the second tool head.

[0026] When installing power equipment, there are high requirements for the installation time. To ensure life and production, it is required to improve the installation speed as much as possible to meet the usage needs as soon as possible.

[0027] The inventor realized during on-site work that nut bolts take up the vast majority of the time during installation, and this repetitive labor cannot use automated tools due to inconvenient operation.

[0028] As Figure 1 shown, one nut and one bolt are on the outside and the other is on the inside, resulting in the inability to use electric tools on both sides simultaneously. Usually, two open-end wrenches are used for tightening, which takes a long time for installation. Due to the large number of bolts and nuts, the assembly speed is seriously affected.

[0029] In response to this, as Figure 2 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.

[0030] Among them, the first bevel gear 102 and the second bevel gear 103 are respectively in transmission connection with the third bevel gear 104. 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 a rotating shaft. The rotating shaft of the first bevel gear 102 or the rotating shaft of the second bevel gear 103 is an output shaft 100, and the output shaft 100 is used to connect to a power source 20.

[0031] The first cylindrical gear 105 is coaxially and fixedly connected to the first bevel gear 102, and the second cylindrical gear 106 is coaxially and fixedly connected to the second bevel gear 103.

[0032] The first tool head 107 may include a first external tooth 1071 and a first sleeve 1072. The first sleeve 1072 is embedded inside the first external tooth 1071. The first tool head 107 is rotatably connected to the housing 101 and is axially slidable along the rotating shaft of the housing 101. The first tool head 107 is in transmission connection with the first cylindrical gear 105 through an even number of cylindrical gears 125, and the first tool head 107 is provided with a first annular groove 1073.

[0033] Correspondingly, the second tool head 108 may include a second external tooth 1081 and a second sleeve 1082. The second sleeve 1082 is embedded inside the second external tooth 1081. The transmission structure of the second tool head 108 is the same as that of the first tool head 107, so that the second tool head 108 is coaxial with the first tool head 107.

[0034] The 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. The first end of the first lever 109 extends into the first annular groove 1073. The 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. The rotational force causes the first end of the first lever 109 to abut against the side surface of the first annular groove 1073, driving the first tool head 107 to slide towards 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.

[0035] In the mechanical structure design, through the ingenious combination of three bevel gears, the transmission effect of coaxial reverse is achieved. Taking the side of the first tool head 107 as an example, since there are always an even number of cylindrical gears 125 between the first tool head 107 and the first cylindrical gear 105, such as 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 rotation directions of the first bevel gear 102 and the second bevel gear 103 are opposite, the rotation directions of the first tool head 107 and the second tool head 108 are always opposite.

[0036] This transmission method directly endows the first tool head 107 and the second tool head 108 on both sides with the characteristic of coaxial reverse rotation. This characteristic enables the bolts 2 and nuts 3 located on both sides of the fastener to be tightened or loosened simultaneously, so it can cooperate with the power source 20 to achieve rapid assembly.

[0037] During use, it is paired with the first lever 109 that always gives it a force towards the second tool head 108. When the first tool head 107 is pulled apart and aligned with the second tool head 108 respectively with the bolts 2 and nuts 3, and the torsion spring is released, they can automatically clamp the bolts 2 and nuts 3. Moreover, the first sleeve 1072 and the second sleeve 1082 respectively equipped on the two tool heads can accurately fit over the bolts 2 and nuts 3 when starting to rotate, ensuring the accuracy and stability of the operation.

[0038] In terms of assembly efficiency and method, this device has obvious advantages. The traditional assembly of bolt 2 and nut 3 requires manual operation with two wrenches, which is a cumbersome process and has low efficiency. However, this device can tighten bolt 2 and nut 3 simultaneously and can be driven by power source 20. This not only abandons the previous complex manual operation mode, greatly reducing the labor cost and labor intensity, but also reduces the alignment time and significantly shortens the assembly time, achieving the purpose of rapid assembly. It has extremely high practical value and broad application prospects in various scenarios where bolt 2 and nut 3 need to be assembled.

[0039] The opposite torques of the first tool head 107 and the second tool head 108 make it so that no additional torque is generated in the rotation plane of bolt 2 by the bolt tightening tool 10. Therefore, it is not easy to cause wear to the machine and it is also more labor-saving to use.

[0040] At the same time, since the rotation axes of the three bevel gears can all extend out of the housing 101 and the movements of the three bevel gears are always linked, the rotation axis of any bevel gear can be used as the output shaft 100 to obtain the power of the power source 20.

[0041] It can be understood that in this application, the power source 20 can be an electric wrench or a pneumatic wrench, or other power sources 20 that replace manual labor.

[0042] It can be understood that in the embodiments of this application, the length of the first external teeth 1071 or the second external teeth 1081 can be less than the length of the corresponding tool head. Therefore, the cylindrical gear cooperating with the tool head can also function as the limiting block 111. Correspondingly, corresponding protrusions can also be provided on the housing 101 to act as the limiting block 111, which will not be elaborated in this application.

[0043] In an embodiment of this application, in order to increase the range of the clamping stroke, as Figure 2 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.

[0044] The second tool head 108 is slidably connected to the housing 101 along the axial direction of the rotation axis. The second tool head 108 is provided with a second annular groove 1083. The second lever 112 is rotatably connected to the housing 101. The rotation axis of the second lever 112 is perpendicular to the rotation axis of the second tool head 108. The leading end of the second lever 112 extends into the second annular groove 1083. The second torsion spring 113 is connected between the second lever 112 and the housing 101. The second torsion spring 113 is used to provide a rotational force for the second lever 112. The rotational force causes the leading end of the second lever 112 to contact the side surface 10831 of the second annular groove, driving the second tool head 108 to slide towards the first tool head 107. A plurality of limiting blocks 111 are also used to limit the displacement of the first tool head 107 relative to the housing 101.

[0045] Among them, the head end of the first pull rod 114 is rotatably connected to the tail end of the first lever 109, 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. 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.

[0046] Through the above solution, the first pull rod 114 and the second pull rod 115 are synchronously operated to achieve a quick 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 fixedly connected or indirectly fixed together through other components.

[0047] 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 transmission-connected to the power source 20 .

[0048] The slider 117 is slidably connected to the slide bar 116, the slide bar 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 respectively fixedly connected to the two ends of the first slide bar 116. The head end of the trigger 118 is rotatably connected to the slider 117, and the middle part of the trigger 118 is rotatably connected to the housing 101. When the tail end of the trigger 118 is subjected to the squeezing force directed to the handle 1011, the head end of the trigger 118 is driven to swing, so that the slide bar 116 moves downward, and the first pull rod 114 and the second pull rod 115 are pulled at the same time.

[0049] 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 the 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 use and reduces the learning cost.

[0050] The structures of the handle 1011 and the trigger 118 enable the bolt tightening tool 10 to be better held.

[0051] 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 transmission-connected to the power source 20 .

[0052] The slider 117 is slidably connected to the slide bar 116. The slide bar 116 is horizontally placed. The tail ends of the first pull rod 114 and the second pull rod 115 are respectively fixedly connected to both ends of the first slide bar 116. The head end of the trigger 118 is rotatably connected to the tail end of the adapter rod 119. The middle part of the adapter rod 119 is rotatably connected to the housing 101. The head end of the adapter rod 119 is rotatably connected to the slider 117. The middle part of the trigger 118 is rotatably connected to the housing 101. When the end of the trigger 118 is subjected to a squeezing force pointing to the handle 1011, it drives the head end of the trigger 118 to swing, and then drives the head end of the adapter rod 119 to swing, causing the slide bar 116 to move downward, and at the same time pulling the first pull rod 114 and the second pull rod 115.

[0053] Even if the position of the power transmission is changed, it does 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.

[0054] Based on the above two embodiments, in order to better ensure the sliding stability of the slider 117 and the slide bar 116, a double-bar slide bar 116 can be adopted, and correspondingly, a double-hole slider 117 can be adopted to reduce the possibility of the slider 117 hitting the wall and wearing.

[0055] In one embodiment, as Figure 3 or Figure 4 shown, the bolt tightening tool 10 further includes a clutch 120, and the clutch 120 is installed between the output shaft 100 and the power source 20.

[0056] The clutch 120 is installed between the output shaft 100 and the power source 20, and plays a key role in torque control in the bolt tightening tool 10. When the power source 20 outputs torque, the clutch 120 can realize the transmission and cut-off of torque. During the process of tightening the bolt 2, by adjusting the clutch 120, the torque transmitted to the output shaft 100 and then acting on the tool head can be accurately controlled.

[0057] For example, when tightening bolts 2 of different specifications, different bolts 2 require different tightening torques. At this time, the clutch 120 can be used to adjust the transmitted torque, avoiding the bolt 2 from slipping or being damaged due to excessive torque, and also preventing the bolt 2 from being loosely tightened due to too small torque. At the same time, after reaching the set torque value, the clutch 120 can also timely cut off the torque output of the power source 20, ensuring the accuracy and safety of the bolt 2 tightening work, and further improving the reliability and practicability of the entire bolt tightening tool 10.

[0058] In another embodiment of the present application, as Figure 6As shown, the bolt tightening tool 10 may further include a synchronizing rod 121. The power source 20 is an electric wrench or a pneumatic wrench. One end of the synchronizing rod 121 is connected to the head end of the trigger 118, and the other end of the synchronizing rod 121 is connected to the output shaft 100 and the trigger mechanism of the electric wrench or the pneumatic wrench.

[0059] When the power source 20 is an electric wrench or a pneumatic wrench, since the electric wrench or the pneumatic wrench itself has a trigger mechanism, the states of the trigger mechanism and the trigger 118 are synchronized through the synchronizing rod 121: when the trigger mechanism pops up, the trigger 118 is pressed, the power source 20 has no output, and the distance between the first tool head 107 and the second tool head 108 increases to prepare for clamping. When the trigger mechanism is pressed, the trigger 118 pops up, the distance between the first tool head 107 and the second tool head 108 decreases to perform clamping, the power source 20 starts to output, and the tightening of the bolt 2 and the nut 3 begins.

[0060] Furthermore, the bolt tightening tool 10 further includes a connecting member 122, and the connecting member 122 is used to connect the housing 101 to the base of the electric wrench or the pneumatic wrench.

[0061] The connecting member 122 plays a reinforcing role, making the linkage between the trigger 118 and the trigger mechanism more effective.

[0062] In an embodiment of the present application, as Figure 5 shown, a retaining ring 1084 is provided on the outer side 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 inside 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 through the bolt 2.

[0063] With this structure, in the preparatory stage, the nut 3 can be directly placed in the second sleeve 1082 without manual alignment in advance. Correspondingly, the bolt 2 can be directly inserted from the outside of the hollow first sleeve 1072, so as to further improve the assembly speed.

[0064] In the present application, as Figure 5 shown, threaded holes 123 are respectively provided in the radial directions of the first external teeth 1071 and the second external teeth 1081. The threaded holes 123 are used to install confidential screws 124, and the confidential screws 124 are used to fix the first sleeve 1072 and the second sleeve 1082. The confidential screws 124 provide a way to disassemble the sleeve, making the sleeve replaceable to suit different working scenarios.

[0065] Correspondingly, as Figure 7As shown, the present application also provides a bolt tightening machine 1, which may include: the bolt tightening tool 10 in any of the embodiments, a motor 30, a trigger switch 50, a power source 40, and a housing 60.

[0066] The motor 30 is in transmission connection with the output shaft 100. The power source 40 is used to supply power to the motor 30. The trigger switch 50 is used to control the on-off of the power source 40 and the motor 30. The housing 60 is fixedly connected to the outer shell 101.

[0067] The bolt tightening machine 1 also has the embodiments and beneficial effects of the bolt tightening tool 10, which will not be elaborated one by one here.

[0068] Compared with the prior art, the beneficial effects of a bolt tightening tool 10 and a bolt tightening machine 1 in an embodiment of the present application are as follows: In the embodiment of the present application, a coaxial reverse transmission is formed by three bevel gears, so that the first tool head 107 and the second tool head 108 on both sides have the coaxial reverse rotation characteristics. Therefore, the bolt 2 and the nut 3 can be tightened simultaneously. Since the first tool head 107 has an elastic structure, the first lever 109 can always apply a force to the first tool head 107 to make it close to the second tool head 108. Therefore, after pulling open the first tool head 107 and aligning the first tool head 107 and the second tool head 108 with the bolt 2 and the nut 3 respectively, the torsion spring can be released so that the first tool head 107 and the second tool head 108 clamp the bolt 2 and the nut 3. After starting to rotate, the first sleeve 1072 and the second sleeve 1082 in the two tool heads will respectively fit over the bolt 2 and the nut 3. Since they can be tightened simultaneously and the power source 20 can be utilized, it is not necessary to use two wrenches for manual assembly, achieving the purpose of rapid assembly.

[0069] The above is only the preferred embodiment of the present application. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and replacements can be made, and these improvements and replacements should also be regarded as the protection scope of the present application.

Claims

1. A bolt tightening tool, characterized in that, The bolt tightening tool (10) includes: A housing (101); A first bevel gear (102); A second bevel gear (103); A third bevel gear (104), the first bevel gear (102) and the second bevel gear (103) are respectively in driving connection with the third bevel gear (104), 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 a rotating shaft, the rotating shaft of the first bevel gear (102) or the rotating shaft of the second bevel gear (103) is an output shaft (100), and the output shaft (100) is used for connecting a power source (20); A first cylindrical gear (105), the first cylindrical gear (105) is coaxially and fixedly connected with the first bevel gear (102); A second cylindrical gear (106), the second cylindrical gear (106) is coaxially and fixedly connected with the second bevel gear (103); A first tool head (107), the first tool head (107) includes a first external tooth (1071) and a first sleeve (1072), the first sleeve (1072) is embedded inside the first external tooth (1071), the first tool head (107) is rotatably connected to the housing (101), and the first tool head (107) is axially slidable along the rotating shaft of the housing (101), the first tool head (107) is in driving connection with the first cylindrical gear (105) through an even number of cylindrical gears (125), and the first tool head (107) is provided with a first annular groove (1073); A second tool head (108), the second tool head (108) includes a second external tooth (1081) and a second sleeve (1082), the second sleeve (1082) is embedded inside the second external tooth (1081), and the transmission structure of the second tool head (108) is the same as that of the first tool head (107), so that the second tool head (108) is coaxial with the first tool head (107); A first lever (109), the first lever (109) is rotatably connected to the housing (101), the rotating shaft of the first lever (109) is perpendicular to the rotating shaft 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), the 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), and the rotational force makes the head end of the first lever (109) contact the side surface of the first annular groove, driving the first tool head (107) to slide towards the second tool head (108); A plurality of limiting blocks (111), and the plurality of limiting blocks (111) are used to limit the displacement of the first tool head (107) relative to the housing (101).

2. The bolt tightening tool according to claim 1, characterized in that The bolt tightening tool (10) further includes a second lever (112), a second torsion spring (113), a first pull rod (114), and a second pull rod (115); The second tool head (108) is slidably connected to the housing (101) along the axial direction of the rotation axis, and the second tool head (108) is provided with a second annular groove (1083); The second lever (112) is rotatably connected to the housing (101), the rotation axis of the second lever (112) is perpendicular to the rotation axis of the second tool head (108), and the head end of the second lever (112) extends into the second annular groove (1083); The second torsion spring (113) is connected between the second lever (112) and the housing (101), and the second torsion spring (113) is used to provide a rotational force for the second lever (112), and the rotational force causes the head end of the second lever (112) to abut against the side surface (10831) of the second annular groove, driving the second tool head (108) to slide towards the first tool head (107); A plurality of the limiting blocks (111) are further used to limit the displacement of the first tool head (107) relative to the housing (101); The head end of the first pull rod (114) is rotatably connected to the tail end of the first lever (109), the head end of the second pull rod (115) is rotatably connected to the tail end of the second lever (112), and the tail ends of the first pull rod (114) and the second pull rod (115) are fixedly connected as an operation end. When the operation end is pulled, the first tool head (107) and the second tool head (108) are simultaneously slid to increase the distance between the first tool head (107) and the second tool head (108).

3. The bolt tightening tool according to claim 2, wherein, The bolt tightening tool (10) further includes a slide rod (116), a slider (117), and a trigger (118). The bottom of the housing (101) is provided with a handle (1011), and the rotation axis of the first bevel gear (102) is in transmission connection with the power source (20); The slider (117) is slidably connected to the slide rod (116), the slide rod (116) is horizontally placed, and the tail ends of the first pull rod (114) and the second pull rod (115) are respectively fixedly connected to both ends of the first slide rod (116); The head end of the trigger (118) is rotatably connected to the slider (117), the middle part of the trigger (118) is rotatably connected to the housing (101), and when the end of the trigger (118) is subjected to a squeezing force pointing to the handle (1011), it drives the head end of the trigger (118) to swing, causing the slide rod (116) to move downward, and simultaneously pulling the first pull rod (114) and the second pull rod (115).

4. The bolt tightening tool according to claim 2, characterized in that The bolt tightening tool (10) further includes 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), and the rotating shaft of the third bevel gear (104) is in transmission connection with the power source (20); The slider (117) is slidably connected to the slide bar (116). The slide bar (116) is horizontally placed, and the tail ends of the first pull rod (114) and the second pull rod (115) are respectively fixedly connected to both ends of the first slide bar (116); The head end of the trigger (118) is rotatably connected to the tail end of the transfer rod (119). The middle part of the transfer rod (119) is rotatably connected to the housing (101). The head end of the transfer rod (119) is rotatably connected to the slider (117). The middle part of the trigger (118) is rotatably connected to the housing (101). When the end of the trigger (118) is subjected to a squeezing force pointing to the handle (1011), it drives the head end of the trigger (118) to swing, and then drives the head end of the transfer rod (119) to swing, so that the slide bar (116) moves downward, and at the same time pulls the first pull rod (114) and the second pull rod (115).

5. The bolt tightening tool according to claim 3 or 4, characterized in that, The bolt tightening tool (10) further includes a clutch (120), and the clutch (120) is installed between the output shaft (100) and the power source (20).

6. The bolt tightening tool according to claim 3 or 4, characterized in that The bolt tightening tool (10) further includes a synchronizing rod (121). The power source (20) is an electric wrench or a pneumatic wrench. One end of the synchronizing rod (121) is connected to the head end of the trigger (118), and the other end of the synchronizing rod (121) is connected to the trigger mechanism of the output shaft (100) and the electric wrench or the pneumatic wrench.

7. The bolt tightening tool according to claim 6, characterized in that, The bolt tightening tool (10) further includes a connecting piece (122), and the connecting piece (122) is used to connect the housing (101) to the base of the electric wrench or the pneumatic wrench.

8. The bolt tightening tool according to claim 1, wherein: A retaining ring (1084) is provided on the outer side 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 inside of the second sleeve (1082) is used for filling nuts (3), and the retaining ring (1084) is used to prevent the nuts (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 through the bolt (2).

9. The bolt tightening tool according to claim 1, characterized in that, Threaded holes (123) are respectively provided in the radial directions of the first external teeth (1071) and the second external teeth (1081). The threaded holes (123) are used to install confidential screws (124), and the confidential screws (124) are used to fix the first sleeve (1072) and the second sleeve (1082).

10. A bolt tightening machine, characterized in that, The bolt tightening machine includes: The bolt tightening tool according to any one of claims 1-9; A motor (30), the motor (30) being drivingly connected to an 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 connection and disconnection between the power supply (40) and the motor (30); A housing (60), the housing (60) being fixedly connected to an outer shell (101).

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