Tightening device

Abstract

The invention discloses a tightening device which comprises a fixing frame, a tightening gun, a moving module and a screwdriver head module, the screwdriver head module comprises a first screwdriver head assembly and a second screwdriver head assembly, and the tightening gun is in transmission and detachable connection with the first screwdriver head assembly and the second screwdriver head assembly; the moving module is at least provided with a first vertical action mechanism and a transverse action mechanism, and the first vertical action mechanism can drive the tightening gun or the screwdriver head module to move up and down, so that the tightening gun is connected with or separated from one of the first screwdriver head assembly and the second screwdriver head assembly; the transverse action mechanism can drive the tightening gun or the screwdriver head module to move in the left-right direction so that the tightening gun can correspond to the first screwdriver head assembly in position and the second screwdriver head assembly in position. Therefore, one tightening gun is correspondingly matched with the first bit assembly and the second bit assembly, the number of the tightening guns is reduced, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of mechanical processing and manufacturing equipment, and in particular to a tightening device. Background Art

[0002] In the related art, small components of different sizes need to be screwed into the workpiece. Since the sizes of the small components are different, a tightening gun is required for each size of the small component, which increases the cost. In addition, the assembly of the small components is carried out on the corresponding workbench. Equipping too many tightening guns will occupy the limited space in the workbench. Summary of the invention

[0003] In order to solve at least one of the above technical problems, the following technical solutions are provided:

[0004] A tightening device comprises a fixed frame, a tightening gun, a mobile module and a screwdriver bit module, wherein part of the mobile module is fixed to the fixed frame, the screwdriver bit module comprises a first screwdriver bit assembly and a second screwdriver bit assembly, the tightening gun is connected to the first screwdriver bit assembly in a transmission and detachable manner, and the tightening gun is connected to the second screwdriver bit assembly in a transmission and detachable manner; the mobile module has at least a first vertical action mechanism and a horizontal action mechanism, the first vertical action mechanism can drive the tightening gun or the screwdriver bit module to move up and down so that the tightening gun is connected to or separated from one of the first screwdriver bit assembly and the second screwdriver bit assembly, and the horizontal action mechanism can drive the tightening gun or the screwdriver bit module to move left and right so that the tightening gun can correspond to the position of the first screwdriver bit assembly or the position of the second screwdriver bit assembly.

[0005] Since the first vertical action mechanism can drive the tightening gun or the bit module to move up and down so that the tightening gun can be connected to or separated from one of the first and second head assemblies, the horizontal action mechanism can drive the tightening gun or the bit module to move left and right so that the tightening gun can correspond to the position of the first head assembly or the second head assembly. In this way, the tightening gun and the bit module can be connected or separated in the up and down directions and can be switched in the left and right directions, thereby achieving the corresponding cooperation between a tightening gun and the first and second head assemblies, reducing the number of tightening guns, making one tightening device suitable for small parts of two different sizes, and helping to reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the present application;

[0007] Figure 2 for Figure 1 A three-dimensional schematic diagram of the first vertical action mechanism and the tightening gun;

[0008] Figure 3 for Figure 2 A cross-sectional schematic diagram of the first vertical action mechanism and the tightening gun;

[0009] Figure 4 for Figure 1 A three-dimensional schematic diagram of a tightening gun;

[0010] Figure 5 for Figure 4 A magnified schematic diagram of the middle area A;

[0011] Figure 6 for Figure 1 A three-dimensional schematic diagram of the middle screwdriver module;

[0012] Figure 7 for Figure 6 A magnified schematic diagram of the middle area B;

[0013] Figure 8 for Figure 1 A three-dimensional schematic diagram of the second connecting member;

[0014] Fig. 9 It is a schematic top view of the first embodiment of the present application;

[0015] Fig.10 It is a rear view schematic diagram of the first embodiment of the present application;

[0016] Fig.11 for Fig.10 A magnified schematic diagram of the middle area C;

[0017] Fig.12 It is a three-dimensional schematic diagram of the second embodiment of the present application;

[0018] Fig.13 This is a schematic diagram of a tightening gun in a first position in a second embodiment of the present application;

[0019] Fig.14 This is a schematic diagram of a tightening gun in a second embodiment of the present application being located at a second position;

[0020] Fig.15 This is a schematic diagram of a tightening gun in the second embodiment of the present application being located at a third position;

[0021] Fig.16 This is a schematic diagram of a tightening gun in the second embodiment of the present application being located at a fourth position;

[0022] Fig.17 This is a schematic diagram of the screwdriver bit assembly in the second embodiment of the present application being located at the sixth vertical position;

[0023] Fig.18 for Figure 6 A schematic diagram of the middle horizontal output assembly, part of the second vertical output assembly and the fixing frame;

[0024] Fig.19 for Figure 6 A schematic diagram of the second vertical output component;

[0025] Fig. 20 It is a three-dimensional schematic diagram of the third embodiment of the present application;

[0026] Fig.21 It is a three-dimensional schematic diagram of the fourth embodiment of the present application;

[0027] Fig. 22 It is a three-dimensional schematic diagram of the fifth embodiment of the present application.

[0028] Reference numerals:

[0029] 100, fixed frame; 200, mobile module; 300, screwdriver module; 400, screwdriver; 500, first stop member; 600, second stop member; 700, third stop member; 800, fourth stop member;

[0030] 31. First batch of head assemblies; 32. Second batch of head assemblies; 33. Base; 21. Horizontal action mechanism; 22. First vertical action mechanism; 23. Second vertical action mechanism;

[0031] 101, guide channel / guide groove; 211, horizontal body; 212, horizontal output assembly; 221, first vertical body; 222, first vertical output assembly; 231, second vertical body; 232, second vertical output assembly; 2121, horizontal guide rail; 2122, horizontal slider; 2123, horizontal output shaft; 2124, moving member; 2125, fixed plate; 2211, first guide rail groove; 2221, first vertical output shaft; 2222, transmission seat; 2223, connecting seat; 2321, vertical guide rail; 2322, vertical slider; 2323, second vertical output shaft; 2324, first stop member; 2325, second stop member; 2326, first elastic member;

[0032] 301, first connecting member;

[0033] 311, first transmission shaft; 312, first batch head body; 313, first batch head base; 314, second elastic member; 3111, first connecting end; 3112, second connecting end; 3113, first limiting step; 3114, first guiding part; 315, first accommodating channel;

[0034] 321, second transmission shaft; 322, second batch head body; 323, second batch head base; 324, third elastic member; 3211, third connecting end; 3212, fourth connecting end; 3213, second limiting step portion; 3214, second guide portion; 325, second accommodating channel;

[0035] 401, tighten the output shaft; 402, second connecting member; 4021, accommodating matching portion; 4022, accommodating matching cavity; 4023, matching wall; 4024, accommodating matching groove;

[0036] 4011, first matching surface portion; 4012, connecting wall portion; 4013, limiting flange portion;

[0037] 4025, receiving groove; 4026, receiving hole; 4027, second mating surface portion. DETAILED DESCRIPTION

[0038] The technical solution of the specific implementation mode is described below with reference to the accompanying drawings.

[0039] like Figure 1-11 A first embodiment is shown:

[0040] A tightening device includes a fixed frame 100, a tightening gun 400, a mobile module 200 and a screwdriver bit module 300, wherein a portion of the mobile module 200 is fixed to the fixed frame 100, the screwdriver bit module 300 includes a first screwdriver bit assembly 31 and a second screwdriver bit assembly 32, the screwdriver bit assembly 400 is connected to the first screwdriver bit assembly 31 in a transmission and detachable manner, and the screwdriver bit assembly 400 is connected to the second screwdriver bit assembly 32 in a transmission and detachable manner; the mobile module 200 has at least a first vertical action mechanism 22 and a horizontal action mechanism 21, the first vertical action mechanism 22 can drive the screwdriver bit assembly 400 or the screwdriver bit module 300 to move up and down, so that the screwdriver bit assembly 400 is connected to or separated from one of the first screwdriver bit assembly 31 and the second screwdriver bit assembly 32, and the horizontal action mechanism 21 can drive the screwdriver bit assembly 400 or the screwdriver bit module 300 to move left and right, so that the screwdriver bit assembly 400 can correspond to the position of the first screwdriver bit assembly 31 or the position of the second screwdriver bit assembly 32.

[0041] Since the first vertical action mechanism 22 can drive the tightening gun 400 or the screwdriver bit module 300 to move in the up-down direction (i.e., the vertical direction) so that the tightening gun 400 is connected to or separated from one of the first screwdriver bit assembly 31 and the second screwdriver bit assembly 32, the lateral action mechanism 21 can drive the tightening gun 400 or the screwdriver bit module 300 to move in the left-right direction (i.e., the lateral direction) so that the tightening gun 400 can correspond to the position of the first screwdriver bit assembly 31 or the position of the second screwdriver bit assembly 32. In this way, the tightening gun 400 and the screwdriver bit module 300 can be connected or separated in the up-down direction and can switch positions in the left-right direction, thereby realizing the corresponding cooperation between a tightening gun 400 and the first screwdriver bit assembly 31 and the second screwdriver bit assembly 32, reducing the number of tightening guns 400, so that one tightening device can be suitable for small parts of two different sizes, which is conducive to reducing costs.

[0042] The lateral action mechanism 21 includes a lateral main body 211, which also includes a lateral output assembly 212. The lateral main body 211 is connected to the lateral output assembly 212, and the lateral output assembly 212 is at least partially movable in the left-right direction. The first vertical action mechanism 22 includes a first vertical main body 221, which also includes a first vertical output assembly 222. The first vertical main body 221 is connected to the first vertical output assembly 222, and the first vertical output assembly 222 is at least partially movable in the up-down direction.

[0043] In some embodiments, the first vertical action mechanism 22 is connected to one of the tightening gun 400 and the screwdriver bit module 300, and the horizontal action mechanism 21 is connected to the other of the tightening gun 400 and the screwdriver bit module 300; in this embodiment, the first vertical action mechanism 22 is connected to the horizontal action mechanism 21, and a portion of the first vertical action mechanism 22 and the horizontal action mechanism 21 is fixed to the fixing frame 100, and the first vertical action mechanism 22 and the other of the horizontal action mechanisms 21 are connected to the tightening gun 400 or the screwdriver bit module 300, specifically, the horizontal body portion 211 is fixed to the fixing frame 100, the horizontal output assembly 212 is connected to the first vertical body portion 221, and the tightening gun 400 is connected to the first vertical output assembly 222. In some embodiments, the first vertical body portion 221 is fixed to the fixing frame 100, the first vertical output assembly 222 is connected to the horizontal body portion 211, and the tightening gun 400 is connected to the horizontal output assembly 212. In this way, the lateral action mechanism 21 and the first vertical action mechanism 22 are connected to achieve movement in the left-right direction and the up-down direction at the same time.

[0044] In this embodiment, the first vertical action mechanism 22 is a motor, the horizontal action mechanism 21 is a cylinder, and the tightening device further includes a first stop member 500 and a second stop member 600 , and the first stop member 500 and the second stop member 600 are both connected to the fixing frame 100 .

[0045] In this embodiment, the tightening gun 400 has a first position, a second position, a third position and a fourth position. In the first position, the tightening gun 400 corresponds to the first batch of head assemblies 31 and is connected thereto; in the second position, the tightening gun 400 corresponds to the first batch of head assemblies 31 and is separated therefrom; in the third position, the tightening gun 400 corresponds to the second batch of head assemblies 32 and is separated therefrom; in the fourth position, the tightening gun 400 corresponds to the second batch of head assemblies 32 and is connected thereto.

[0046] When it is necessary to switch to the second batch head assembly 32, the first vertical output assembly 222 drives the tightening gun 400 to move upward from the first position to the second position; then, the transverse output assembly 212 drives the first vertical output assembly 222 and the tightening gun 400 to move in the transverse direction to the third position; the first vertical output assembly 222 then drives the tightening gun 400 to move downward to the fourth position, and the tightening gun 400 corresponds to the second batch head assembly 32 and is connected to it to complete the switching.

[0047] In the second position, the first stop member 500 abuts against the transverse output assembly 212 (specifically, the first stop member 500 abuts against the movable member 2124 described later) to limit the transverse output assembly 212 from continuing to move to the right; in the third position, the second stop member 600 abuts against the transverse output assembly 212 (specifically, the second stop member 600 abuts against the movable member 2124 described later) to limit the transverse output assembly 212 from continuing to move to the left.

[0048] The transverse output assembly 212 includes at least one transverse guide rail 2121 and at least one transverse slider 2122 . In this embodiment, there are two transverse guide rails 2121 and two transverse sliders 2122 .

[0049] The transverse slider 2122 is embedded in the transverse guide rail 2121, and the transverse guide rail 2121 can slide in the left and right directions along the transverse guide rail 2121; the transverse output assembly 212 includes a transverse output shaft 2123, a movable member 2124 and a fixed plate 2125. In the vertical direction, the two guide rails are respectively located on both sides of the output shaft, one end of the transverse output shaft 2123 is connected to the transverse main body 211, and the other end of the transverse output shaft 2123 is connected to the movable member 2124, the movable member 2124 is fixed to the fixed plate 2125, the transverse slider 2122 is fixed to the fixed plate 2125, and the first vertical main body 221 is fixed to the fixed plate 2125; in the present embodiment, the movable member 2124 and the fixed plate 2125 are separately arranged, and in some embodiments, the movable member 2124 and the fixed plate 2125 are integrated.

[0050] In this way, the moving member 2124 is fixed to the fixed plate 2125, the transverse slider 2122 is fixed to the fixed plate 2125, and the first vertical main body 221 is fixed to the fixed plate 2125, that is, the first vertical main body 221 is fixed to the moving member 2124 through the fixed plate 2125. Since the transverse output shaft 2123 is connected to the moving member 2124, the transverse output shaft 2123 can drive the moving member 2124 and the first vertical main body 221 to move along the transverse direction, and the transverse slider 2122 is fixed to the fixed plate 2125, and the transverse slider 2122 moves along the transverse direction with the moving member 2124. Since the first vertical action mechanism 22 and the tightening gun 400 themselves are heavy, the transverse slider 2122 and the transverse guide rail 2121 can reduce the load of the transverse output assembly 212, while also ensuring the stability and reliability of the first vertical main body 221 moving along the transverse direction.

[0051] The fixing frame 100 is provided with a guide channel or a guide groove 101. In this embodiment, the fixing frame 100 is provided with a guide channel. The moving member 2124 is at least partially located in the guide channel or the guide groove 101, and the moving member 2124 can slide in the left and right directions along the wall corresponding to the guide channel or the guide groove 101. In this way, the wall corresponding to the guide channel plays a role of supporting and guiding the moving member 2124.

[0052] The first vertical output assembly 222 includes a first vertical output shaft 2221, a transmission seat 2222 and a connecting seat 2223. The first vertical body portion 221 has a first guide rail groove 2211. The first vertical output shaft 2221 is at least partially located in the first guide rail groove 2211, and the transmission seat 2222 is at least partially located in the first guide rail groove 2211; the transmission seat 2222 is sleeved on the first vertical output shaft 2221 and threadedly matched therewith. The first vertical output shaft 2221 can drive the transmission seat 2222 to move in the vertical direction. The connecting seat 2223 is connected to the transmission seat 2222, and the tightening gun 400 or the horizontal body portion 211 is fixed to the connecting seat 2223 (in this embodiment, the tightening gun 400 is fixed to the connecting seat 2223); in this embodiment, the transmission seat 2222 and the connecting seat 2223 are separately arranged, and in some embodiments, the transmission seat 2222 and the connecting seat 2223 are integrated.

[0053] In this way, the first vertical output shaft 2221 is threadedly matched with the transmission seat 2222, and the transmission seat 2222 is at least partially located in the first guide rail groove 2211. The first guide rail groove 2211 limits the transmission seat 2222 to prevent it from rotating. Therefore, when the first vertical output shaft 2221 rotates, it can drive the transmission seat 2222 to move in the vertical direction. The transmission seat 2222 is connected to the connecting seat 2223, and the tightening gun 400 or the horizontal main body 211 is fixed to the connecting seat 2223, thereby further driving the tightening gun 400 or the horizontal main body 211 to move in the vertical direction.

[0054] The tightening gun 400 has a tightening output shaft 401 and a second connecting member 402, one end of the second connecting member 402 is connected to the tightening output shaft 401, the first batch head assembly 31 has a first transmission shaft 311 and a first batch head body 312, the first transmission shaft 311 has a first connecting end 3111 and a second connecting end 3112, the first connecting end 3111 is connected to the first batch head body 312, and the second connecting end 3112 is used to connect to the other end of the second connecting member 402. Specifically, when in the first position, the first The second connection end 3112 is connected to the other end of the second connection member 402; the second screwdriver assembly 32 has a second transmission shaft 321 and a second screwdriver body 322, the second transmission shaft 321 has a third connection end 3211 and a fourth connection end 3212, the third connection end 3211 is connected to the second screwdriver body 322, and the fourth connection end 3212 is used to connect to the other end of the second connection member 402, specifically, when in the fourth position, the fourth connection end 3212 is connected to the other end of the second connection member 402. In the second position or the third position, the screwdriver module 300 is separated from the second connection member 402.

[0055] In this way, the tightening output shaft 401 can be connected to the first transmission shaft 311 or the second transmission shaft 321 through the second connecting member 402, so that when the tightening output shaft 401 rotates, it can drive the first transmission shaft 311 or the second transmission shaft 321 to rotate together.

[0056] The other end of the second connecting member 402 is provided with a accommodating matching portion 4021, and the accommodating matching portion 4021 has an accommodating matching cavity 4022, and the opening of the accommodating matching cavity 4022 is arranged to face downward, and the second connecting end portion 3112 or the fourth connecting end portion 3212 can be circumferentially limited with the wall of the accommodating matching cavity 4022. When in the first position, at least a portion of the second connecting end portion 3112 is located in the accommodating matching cavity 4022, and the second connecting end portion 3112 is circumferentially limited with the wall of the accommodating matching cavity 4022. When in the fourth position, the fourth connecting end portion 3212 At least part of it is located in the accommodating and fitting cavity 4022, and the fourth connecting end portion 3212 is circumferentially limited with the wall of the accommodating and fitting cavity 4022; the first connecting end portion 3111 is provided with a first guide portion 3114, and the fourth connecting end portion 3212 is provided with a second guide portion 3214; along the vertical and upward direction, the cross-sectional area of ​​the first guide portion 3114 and the cross-sectional area of ​​the second guide portion 3214 are gradually reduced; the cross-sectional area of ​​the main body of the second connecting end portion 3112 and the fourth connecting end portion 3212 is a polygon, and the number of its sides is defined as x, and the value of x is greater than or equal to three.

[0057] The accommodating mating portion 4021 has at least three mating walls 4023, and the accommodating mating portion 4021 includes at least three accommodating mating grooves 4024. The number of the mating walls 4023 is the same as that of the accommodating mating portion 4021. In the circumferential direction of the accommodating mating portion 4021, the accommodating mating grooves 4024 are evenly distributed, the mating walls 4023 are evenly distributed, and the walls corresponding to the accommodating mating grooves 4024 are sequentially connected to the mating walls 4023. The value of x is the same as the number of the mating walls 4023. In this embodiment, the number of the mating walls 4023 is six.

[0058] In this way, since the second connecting end 3112 or the fourth connecting end 3212 can be circumferentially limited with the wall of the accommodating cavity 4022, the first transmission shaft 311 or the second transmission shaft 321 plays a transmission role, the tightening gun 400 can drive the second connecting member 402 to rotate, and the second connecting member 402 drives the first transmission shaft 311 or the second transmission shaft 321 to rotate, and further drives the first batch head body 312 or the second batch head body 322 to rotate.

[0059] One end of the second connecting member 402 is provided with a receiving groove 4025, the opening of the receiving groove 4025 faces the tightening output shaft 401, and at least a part of the tightening output shaft 401 is located in the receiving groove 4025; in the radial direction, a gap is left between the tightening output shaft 401 and the wall corresponding to the receiving groove 4025; the tightening output shaft 401 has at least two first matching surface parts 4011 and at least two connecting wall parts 4012, the first matching surface parts 4011 and the connecting wall parts 4012 are evenly distributed in the circumferential direction of the tightening output shaft 401, and any one of the connecting wall parts 4012 is located between two adjacent first matching surface parts 4011. In the embodiment, the surface corresponding to the connecting wall portion 4012 is a curved surface; the wall corresponding to the receiving groove 4025 includes at least two second matching surface portions 4027, the number of the second matching surface portions 4027 is the same as that of the first matching surface portions 4011, and the second matching surface portions 4027 are evenly distributed along the circumferential direction of the second connecting member 402; the tightening output shaft 401 has a limiting flange portion 4013, the limiting flange portion 4013 protrudes from the first matching surface portion 4011, and one end of the second connecting member 402 is provided with a receiving hole 4026, the receiving hole 4026 is connected to the receiving groove 4025, and the limiting flange portion 4013 is at least partially located in the receiving hole 4026. In this embodiment, the number of the first matching surface portion 4011 and the second matching surface portion 4027 are both four.

[0060] In this way, since the limiting flange portion 4013 is at least partially located in the accommodating hole 4026, the circumferential limiting cooperation and axial limiting cooperation of the tightening output shaft 401 and the second connecting member 402 are realized, so that the tightening output shaft 401 can drive the second connecting member 402 to rotate; since at least part of the tightening output shaft 401 is located in the accommodating groove 4025, and in the radial direction, a gap is left between the tightening output shaft 401 and the wall corresponding to the accommodating groove 4025, so that the second connecting member 402 has freedom in the front-to-back direction and the left-to-right direction, that is, when the axis of the tightening output shaft 401 deviates from the axis of the second connecting member 402, the tightening output shaft 401 can still drive the second connecting member 402 to rotate.

[0061] The first batch of head components 31 have a first batch of head bases 313, and the first batch of head bases 313 have a first accommodating channel 315, which vertically penetrates the body of the first batch of head bases 313. Part of the first transmission shaft 311 is located in the first accommodating channel 315 and rotates with the wall corresponding to the first accommodating channel 315; the side wall of the first transmission shaft 311 is provided with a first limiting step portion 3113, and the first limiting step portion 3113 is located above the first batch of head bases 313, and the outer diameter of the first limiting step portion 3113 is greater than the inner diameter of the first accommodating channel 315; the first batch of head components 31 have a second elastic member 314, which is sleeved on the first transmission shaft 311, the first batch of head bodies 312 are located below the first batch of head bases 313, the second elastic member 314 is located between the first batch of head bases 313 and the first batch of head bodies 312, and the two ends of the second elastic member 314 are respectively abutted against the first batch of head bases 313 and the first batch of head bodies 312. In this way, the second elastic member 314 plays the role of buffering and pre-tightening the material.

[0062] The second batch head assembly 32 has a second batch head base 323, and the second batch head base 323 has a second accommodating channel 325, and the second accommodating channel 325 vertically penetrates the body of the second batch head base 323, and a portion of the second transmission shaft 321 is located in the second accommodating channel 325, and is rotatably matched with the wall corresponding to the second accommodating channel 325; the side wall of the second transmission shaft 321 is provided with a second limiting step portion 3213, and the second limiting step portion 3213 is located above the second batch head base 323, and the outer diameter of the second limiting step portion 3213 is greater than the inner diameter of the second accommodating channel 325; the second batch head assembly 32 has a third elastic member 324, and the third elastic member 324 is sleeved on the second transmission shaft 321, and the second batch head body 322 is located below the second batch head base 323, and the third elastic member 324 is located between the second batch head base 323 and the second batch head body 322, and the two ends of the third elastic member 324 are respectively abutted against the second batch head base 323 and the second batch head body 322. In this way, the third elastic member 324 plays the role of buffering and pre-tightening the material.

[0063] In the front-to-back direction, the distance between the axis of the first accommodating channel 315 and the fixing frame 100 is a, the distance between the axis of the second accommodating channel 325 and the fixing frame 100 is b, and the distance between the axis of the tightening gun 400 and the fixing frame 100 is c, a equals b, b equals c. It should be noted that the error caused by the processing or assembly of parts is also included in the scope of the claims of this application. In this way, in the first position and the second position, the tightening gun 400 corresponds to the second connecting end 3112, and in the third position and the fourth position, the tightening gun 400 corresponds to the third connecting end 3211.

[0064] The working process is as follows:

[0065] In the first position, the tightening gun 400 corresponds to the first batch of head components 31 and is connected thereto. When it is necessary to switch to the second batch of head components 32, under the action of the first vertical action mechanism 22, the first vertical output component 222 drives the tightening gun 400 to move up to the second position, whereupon the tightening gun 400 is separated from the first batch of head components 31, and then under the action of the horizontal action mechanism 21, the horizontal output component 212 drives the first vertical action mechanism 22 and the tightening gun 400 to move together in the horizontal direction until the tightening gun 400 corresponds to the second batch of head components 32, that is, to the third position, and then under the action of the first vertical action mechanism 22, the first vertical output component 222 drives the tightening gun 400 to move down until the tightening gun 400 is connected to the second batch of head components 32, that is, to the fourth position, whereupon the switching is completed. When it is necessary to switch back to the first batch of head components 31, under the action of the first vertical action mechanism 22, the first vertical output component 222 drives the tightening gun 400 from the fourth position to the third position, at which point the tightening gun 400 is separated from the second batch of head components 32, and then under the action of the horizontal action mechanism 21, the horizontal output component 212 drives the first vertical action mechanism 22 and the tightening gun 400 to move together in the horizontal direction to the second position, and then under the action of the first vertical action mechanism 22, the first vertical output component 222 drives the tightening gun 400 to move down until the tightening gun 400 is connected to the first batch of head components 31, that is, to the first position, and the switching is completed.

[0066] Figure 12-19 A second embodiment is shown. In this embodiment,

[0067] The mobile module 200 further includes at least one second vertical action mechanism 23, which includes a second vertical body portion 231 and a second vertical output assembly 232. The second vertical body portion 231 is fixed to the fixing frame 100, and the second vertical output assembly 232 can move in the up and down directions. In this embodiment, the number of the second vertical action mechanisms 23 is two, and the first batch of head assemblies 31 and the second batch of head assemblies 32 are separately arranged. In some embodiments, the number of the second vertical action mechanism 23 is one, and the first batch of head assemblies 31 and the second batch of head assemblies 32 are relatively fixedly arranged. The two second vertical output assemblies 232 are respectively connected to the first batch of head assemblies 31 and the second batch of head assemblies 32. The first batch of head groups has a fifth vertical position and a sixth vertical position, the fifth vertical position is below the sixth vertical position, the second batch of head assembly 32 has a seventh vertical position and an eighth vertical position, the seventh vertical position is below the eighth vertical position; when the tightening gun 400 is in the first position, the first batch of head groups is in the fifth vertical position, and when the tightening gun 400 is in the fourth position, the second batch of head assembly 32 is in the seventh vertical position.

[0068] In this way, the second vertical output component 232 is connected to the batch head module 300, and the second vertical output component 232 can drive the first batch head component 31 and the second batch head component 32 to move up and down, so that the first batch head component 31 and the second batch head component 32 can act on materials at different heights.

[0069] The second vertical output assembly 232 includes at least one vertical guide rail 2321 and at least one vertical slider 2322. In this embodiment, the second vertical output assembly 232 includes a vertical guide rail 2321 and a vertical slider 2322. The vertical slider 2322 is embedded in the vertical guide rail 2321, and the vertical guide rail 2321 can slide in the vertical direction along the vertical guide rail 2321. The screwdriver module 300 is fixed to the vertical slider 2322, specifically, the first screwdriver assembly 31 is fixed to the guide slider of one of the second vertical output assemblies 232, and the second screwdriver assembly 32 is fixed to the guide slider of another second vertical output assembly 232.

[0070] In this way, since the first batch of head assemblies 31 and the second batch of head assemblies 32 are respectively fixed to the two vertical sliders 2322, and the two vertical sliders 2322 are respectively embedded in the two vertical guide rails 2321, the stability and reliability of the first batch of head assemblies 31 moving in the vertical direction are guaranteed.

[0071] In this embodiment, the second vertical action mechanism 23 is a cylinder, and the tightening device further includes at least one third stop member 700 and at least one fourth stop member 800. The third stop member 700 and the fourth stop member 800 are fixed to the fixing frame 100. The number of the third stop member 700 and the fourth stop member 800 is the same as the number of the second vertical action mechanism 23, specifically two. In the sixth vertical position or the eighth vertical position, the third stop member 700 abuts against the first batch of head components 31 or the second batch of head components 32 to limit their continued upward movement; in the fifth vertical position or the seventh vertical position, the fourth stop member 800 abuts against the first batch of head components 31 or the second batch of head components 32 or the vertical slider 2322 to limit their continued downward movement. In some embodiments, the third stop member 700 and the fourth stop member 800 are buffers.

[0072] The second vertical output assembly 232 includes a second vertical output shaft 2323, a first stopper 2324, a second stopper 2325 and a first elastic member 2326. One end of the second vertical output shaft 2323 is connected to the first vertical main body 221. The first stopper 2324 and the second stopper 2325 are respectively sleeved on the second vertical output shaft 2323 and fixed thereto. The first stopper 2324 is farther away from the first vertical main body 221 than the second stopper 2325. The first elastic member 2326 is Part 2326 is sleeved on the second vertical output shaft 2323; the screwdriver bit module 300 has a first connecting member 301, the second vertical output shaft 2323 is penetrated by the first connecting member 301, and the first connecting member 301 can move in the up and down directions along the second vertical output shaft 2323, the first limiting member 2324 and the second limiting member 2325 are respectively located on both sides of the first connecting member 301, and the two ends of the first elastic member 2326 are respectively abutted against the second limiting member 2325 and the first connecting member 301.

[0073] The working process is as follows:

[0074] In the first position, the tightening gun 400 corresponds to one of the two or more first batch head assemblies 31 and is connected thereto. When the first batch head assembly 31 needs to be switched, under the action of the first vertical action mechanism 22, the first vertical output assembly 222 drives the tightening gun 400 to move up to the second position, where the tightening gun 400 is separated from the first batch head assembly 31. Then, under the action of the horizontal action mechanism 21, the horizontal output assembly 212 drives the first vertical action mechanism 22 and the tightening gun 400 to move together in the horizontal direction until the tightening gun 400 corresponds to another one of the two or more first batch head assemblies 31, that is, to the third position. Then, under the action of the first vertical action mechanism 22, the first vertical output assembly 222 drives the tightening gun 400 to move down until the tightening gun 400 is connected to another first batch head assembly 31, that is, to the fourth position. At this point, the switching is completed. When in the second position or the third position, the second vertical action mechanism 23 can drive the first batch of head assemblies 31 to move between the fifth vertical position and the sixth vertical position, thereby adjusting the height of the first batch of head assemblies 31, and then the tightening gun 400 moves down to connect with the first batch of head assemblies 31, further acting on materials located at different heights.

[0075] Fig. 20 A third embodiment is shown. In this embodiment,

[0076] The first vertical body part 221 is fixed to the fixing frame 100, and the tightening gun 400 is connected to the first vertical output assembly 222. The first vertical output assembly 222 can drive the tightening gun 400 to move in the vertical direction. The transverse body part 211 is fixed to the fixing frame 100, and the screwdriver bit module 300 is connected to the transverse output assembly 212. The transverse output assembly 212 can drive the screwdriver bit module 300 to move in the transverse direction. Specifically, the screwdriver bit module 300 is fixed to the fixing plate 2125 of the transverse output assembly 212. The tightening gun 400 has a first vertical position and a second vertical position. In the first vertical position, the tightening gun 400 is connected to one of the first batch head assembly 31 and the second batch head assembly 32. In the second lateral position, the tightening gun 400 is separated from the first batch head assembly 31 and the second batch head assembly 32. The screwdriver head module 300 has a first lateral position and a second lateral position. In the first lateral position, the tightening gun 400 corresponds to the first batch head assembly 31. In the second lateral position, the tightening gun 400 corresponds to the second batch head assembly 32.

[0077] In this way, the lateral action mechanism 21 plays a switching role. When it is necessary to switch to the first batch of head components 31 or the second batch of head components 32, the first vertical output component 222 drives the tightening gun 400 to move up to the second vertical position, and then the lateral output component 212 drives the screwdriver head module 300 to move in the left and right direction to move from the first lateral position to the second lateral position or from the second lateral position to the first lateral position, and then under the action of the first vertical output component 222, the tightening gun 400 is driven to move down to the first vertical position, thereby connecting with the first batch of head components 31 or the second batch of head components 32.

[0078] Fig.21 A fourth embodiment is shown. In this embodiment,

[0079] The horizontal body part 211 is fixed to the fixing frame 100, and the tightening gun 400 is connected to the horizontal output assembly 212, and the horizontal output assembly 212 can drive the tightening gun 400 to move in the horizontal direction. The first vertical body part 221 is fixed to the fixing frame 100, and the screwdriver bit module 300 is connected to the first vertical output assembly 222, and the first vertical output assembly 222 can drive the screwdriver bit module 300 to move in the vertical direction; the tightening gun 400 has a third horizontal position and a fourth horizontal position, in which the tightening gun 400 corresponds to the first screwdriver bit assembly 31, and in which the tightening gun 400 corresponds to the second screwdriver bit assembly 32; the screwdriver bit module 300 has a third vertical position and a fourth vertical position, in which the tightening gun 400 is connected to the first screwdriver bit assembly 31 or the second screwdriver bit assembly 32 in the third vertical position, and in which the tightening gun 400 is separated from the screwdriver bit module 300 in the fourth vertical position.

[0080] In this way, the lateral action mechanism 21 plays a switching role. When it is necessary to switch to the first batch head assembly 31 or the second batch head assembly 32, the first vertical output assembly 222 drives the bit module 300 to move down to the fourth vertical position, and the lateral output assembly 212 drives the tightening gun 400 to move from the third lateral position to the fourth lateral position or from the fourth lateral position to the third lateral position along the lateral direction. Then, the first batch head assembly 31 or the second batch head assembly 32 corresponding to the tightening gun 400 is driven by the first vertical output assembly 222 to move up to the third vertical position, thereby completing the switching.

[0081] Fig. 22 A fifth embodiment is shown. In this embodiment,

[0082] In this embodiment, the horizontal output component 212 is connected to the first vertical main body portion 221, and the bit module 300 is connected to the first vertical output component 222. Specifically, the bit module 300 has a base 33, and the first batch head bases 313 of the first batch head assembly 31 are fixed to the base 33, and the second batch head base 323 of the second batch head assembly 32 is fixed to the base 33. The base 33 is fixed to the transmission base 2222 of the first vertical output component 222, so that the first vertical output component 222 can drive the bit module 300 to move in the vertical direction; in some embodiments, the first vertical output component 222 is connected to the horizontal main body portion 211, and the bit module 300 is connected to the horizontal output component 212. In this embodiment, the screwdriver bit module 300 has a fifth position, a sixth position, a seventh position and an eighth position. In the fifth position, the tightening gun 400 corresponds to the first batch of head assemblies 31 and is connected thereto; in the sixth position, the tightening gun 400 corresponds to the first batch of head assemblies 31 and is separated therefrom; in the seventh position, the tightening gun 400 corresponds to the second batch of head assemblies 32 and is separated therefrom; in the eighth position, the tightening gun 400 corresponds to the second batch of head assemblies 32 and is connected thereto.

[0083] In this way, when it is necessary to switch to the second batch head assembly 32, the first vertical output assembly 222 drives the tightening gun 400 to move down from the fifth position to the sixth position, and then the horizontal output assembly 212 drives the batch head module 300 to move to the seventh position in the horizontal direction, and the first vertical output assembly 222 drives the batch head module 300 to move up to the eighth position, and the tightening gun 400 is connected to the second batch head assembly 32, and the switching is completed. When it is necessary to switch back to the first batch head assembly 31, the first vertical output assembly 222 drives the batch head module 300 to move down from the eighth position to the seventh position, and then the horizontal output assembly 212 drives the batch head module 300 to move to the sixth position in the horizontal direction, and the first vertical output assembly 222 drives the batch head module 300 to move up to the fifth position, and the tightening gun 400 is connected to the first batch head assembly 31, and the switching is completed.

[0084] It should be noted that:

[0085] In the present invention, the terms "first", "second", "third", "fourth" and "fifth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features.

[0086] Although this specification has described the present application in detail with reference to the above-mentioned implementation modes, a person of ordinary skill in the art should understand that a person of ordinary skill in the art can still modify, combine or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. A tightening device, comprising a fixing frame (100), a tightening gun (400) and a screwdriver bit module (300), characterized in that: The tightening device further comprises a movable module (200), a part of which is fixed to the fixed frame (100), the screwdriver bit module (300) comprises a first screwdriver bit assembly (31) and a second screwdriver bit assembly (32), the screwdriver gun (400) is connected to the first screwdriver bit assembly (31) in a transmission and detachable manner, and the screwdriver gun (400) is connected to the second screwdriver bit assembly (32) in a transmission and detachable manner; The movable module (200) comprises at least a first vertical action mechanism (22) and a horizontal action mechanism (21); the first vertical action mechanism (22) can drive the tightening gun (400) or the screwdriver bit module (300) to move up and down, so that the tightening gun (400) is connected to or separated from one of the first screwdriver bit assembly (31) and the second screwdriver bit assembly (32); the horizontal action mechanism (21) can drive the tightening gun (400) or the screwdriver bit module (300) to move left and right, so that the tightening gun (400) can correspond to the position of the first screwdriver bit assembly (31) or the tightening gun (400) can correspond to the position of the second screwdriver bit assembly (32).

2. A tightening device according to claim 1, characterized in that: The first vertical action mechanism (22) is connected to the horizontal action mechanism (21), a portion of one of the first vertical action mechanism (22) and the horizontal action mechanism (21) is fixed to the fixing frame (100), and the other of the first vertical action mechanism (22) and the horizontal action mechanism (21) is connected to the tightening gun (400) or the screwdriver bit module (300); Alternatively, the first vertical action mechanism (22) is connected to one of the tightening gun (400) and the bit module (300), and the horizontal action mechanism (21) is connected to the other of the tightening gun (400) and the bit module (300).

3. A tightening device according to claim 1, characterized in that: The transverse action mechanism (21) comprises a transverse main body (211), and the transverse action mechanism (21) further comprises a transverse output assembly (212). The transverse main body (211) is connected to the transverse output assembly (212), and at least a part of the transverse output assembly (212) can move in the left-right direction. The first vertical action mechanism (22) comprises a first vertical main body (221), and the first vertical action mechanism (22) further comprises a first vertical output assembly (222), the first vertical main body (221) is connected to the first vertical output assembly (222), and at least part of the first vertical output assembly (222) can move in an up-down direction.

4. A tightening device according to claim 3, characterized in that: The transverse body portion (211) is fixed to the fixing frame (100), the transverse output assembly (212) is connected to the first vertical body portion (221), and the tightening gun (400) is connected to the first vertical output assembly (222), or The first vertical body part (221) is fixed to the fixing frame (100), the first vertical output assembly (222) is connected to the transverse body part (211), and the tightening gun (400) is connected to the transverse output assembly (212); The tightening gun (400) has a first position, a second position, a third position and a fourth position. In the first position, the tightening gun (400) corresponds to the first batch of head assemblies (31) and is connected thereto; In the second position, the tightening gun (400) corresponds to the first batch of head assemblies (31) and is separated therefrom; In the third position, the tightening gun (400) corresponds to the second bit assembly (32) and is separated from it; In the fourth position, the tightening gun (400) corresponds to the second bit assembly (32) and is connected thereto.

5. A tightening device according to claim 3, characterized in that: The first vertical main body (221) is fixed to the fixing frame (100), and the tightening gun (400) is connected to the first vertical output assembly (222). The transverse main body (211) is fixed to the fixing frame (100), and the bit module (300) is connected to the transverse output assembly (212); The tightening gun (400) has a first vertical position and a second vertical position. In the first vertical position, the tightening gun (400) is connected to one of the first batch of head assemblies (31) and the second batch of head assemblies (32). In the second vertical position, the tightening gun (400) is separated from the first batch of head assemblies (31) and the second batch of head assemblies (32). The screwdriver bit module (300) has a first lateral position and a second lateral position. In the first lateral position, the screwdriver bit module (400) corresponds to the first screwdriver bit assembly (31). In the second lateral position, the screwdriver bit module (400) corresponds to the second screwdriver bit assembly (32).

6. A tightening device according to claim 3, characterized in that: The transverse main body (211) is fixed to the fixing frame (100), and the tightening gun (400) is connected to the transverse output assembly (212); The first vertical main body (221) is fixed to the fixing frame (100), and the screwdriver bit module (300) is connected to the first vertical output assembly (222); The tightening gun (400) has a third transverse position and a fourth transverse position. In the third transverse position, the tightening gun (400) corresponds to the first batch of head assemblies (31). In the fourth transverse position, the tightening gun (400) corresponds to the second batch of head assemblies (32). The screwdriver bit module (300) has a third vertical position and a fourth vertical position. In the third vertical position, the screwdriver bit gun (400) is connected to the first screwdriver bit assembly (31) or the second screwdriver bit assembly (32). In the fourth horizontal vertical position, the screwdriver bit gun (400) is separated from the screwdriver bit module (300).

7. A tightening device according to claim 3, characterized in that: The horizontal output component (212) is connected to the first vertical main body (221), and the bit module (300) is connected to the first vertical output component (222), or The first vertical output component (222) is connected to the transverse main body (211), and the bit module (300) is connected to the transverse output component (212); The bit module (300) has a fifth position, a sixth position, a seventh position and an eighth position. In the fifth position, the tightening gun (400) corresponds to the first batch of head assemblies (31) and is connected thereto; In the sixth position, the tightening gun (400) corresponds to the first batch of head assemblies (31) and is separated therefrom; In the seventh position, the tightening gun (400) corresponds to the second bit assembly (32) and is separated from it; In the eighth position, the tightening gun (400) corresponds to the second bit assembly (32) and is connected thereto.

8. A tightening device according to claim 4, characterized in that: The tightening device further comprises at least one second vertical action mechanism (23), The second vertical action mechanism (23) comprises a second vertical main body (231) and a second vertical output assembly (232). The second vertical main body (231) is fixed to the fixing frame (100), and the second vertical output assembly (232) can move in the up and down direction; The bit module (300) is connected to the second vertical output component (232); The first batch of head assemblies (31) has a fifth vertical position and a sixth vertical position, the fifth vertical position being below the sixth vertical position, The second batch head assembly (32) has a seventh vertical position and an eighth vertical position, the seventh vertical position being below the eighth vertical position; When the tightening gun (400) is located at the first position, the first batch of head assemblies (31) are located at the fifth vertical position, When the tightening gun (400) is located at the fourth position, the second bit assembly (32) is located at the seventh vertical position.

9. A tightening device according to claim 8, characterized in that: The second vertical output assembly (232) comprises at least one vertical guide rail (2321) and at least one vertical slider (2322); the vertical slider (2322) is embedded in the vertical guide rail (2321), and the vertical guide rail (2321) can slide in a vertical direction along the vertical guide rail (2321); the screwdriver bit module (300) is fixed to the vertical slider (2322).

10. A tightening device according to claim 8, characterized in that: The second vertical output assembly (232) comprises a second vertical output shaft (2323), a first limiting member (2324), a second limiting member (2325) and a first elastic member (2326); one end of the second vertical output shaft (2323) is connected to the first vertical main body (221); the first limiting member (2324) and the second limiting member (2325) are respectively sleeved on the second vertical output shaft (2323) and fixed thereto; the first limiting member (2324) is farther away from the first vertical main body (221) than the second limiting member (2325); the first elastic member (2326) is sleeved on the second vertical output shaft (2323); The screwdriver bit module (300) comprises a first connecting member (301), the second vertical output shaft (2323) is passed through the first connecting member (301), and the first connecting member (301) can move in the up and down directions along the second vertical output shaft (2323), the first limiting member (2324) and the second limiting member (2325) are respectively located on both sides of the first connecting member (301), and the two ends of the first elastic member (2326) are respectively in contact with the second limiting member (2325) and the first connecting member (301).

11. A tightening device according to claim 4, characterized in that: The transverse output assembly (212) comprises at least one transverse guide rail (2121) and at least one transverse slider (2122), wherein the transverse slider (2122) is embedded in the transverse guide rail (2121), and the transverse guide rail (2121) can slide in a left-right direction along the transverse guide rail (2121); The transverse output assembly (212) comprises a transverse output shaft (2123), a moving member (2124) and a fixed plate (2125); one end of the transverse output shaft (2123) is connected to the transverse main body (211); the other end of the transverse output shaft (2123) is connected to the moving member (2124); the moving member (2124) is fixed to the fixed plate (2125); the transverse slider (2122) is fixed to the fixed plate (2125); and the first vertical main body (221) is fixed to the fixed plate (2125); The moving member (2124) and the fixed plate (2125) are separately arranged or integrally arranged.

12. A tightening device according to claim 11, characterized in that: The fixed frame (100) is provided with a guide channel or a guide groove, the movable member (2124) is at least partially located in the guide channel or the guide groove, and the movable member (2124) can slide in the left and right directions along the wall corresponding to the guide channel or the guide groove.

13. A tightening device according to any one of claims 3 to 7, characterized in that: The first vertical output assembly (222) comprises a first vertical output shaft (2221), a transmission seat (2222) and a connecting seat (2223); the first vertical body portion (221) has a first guide rail groove (2211); the first vertical output shaft (2221) is at least partially located in the first guide rail groove (2211); and the transmission seat (2222) is at least partially located in the first guide rail groove (2211); The transmission seat (2222) is sleeved on the first vertical output shaft (2221) and threadedly matched therewith, the first vertical output shaft (2221) can drive the transmission seat (2222) to move along the vertical direction, the connecting seat (2223) is connected to the transmission seat (2222), and the tightening gun (400) or the transverse main body (211) is fixed to the connecting seat (2223); The transmission seat (2222) and the connecting seat (2223) are arranged in one piece or in separate pieces.

14. A tightening device according to any one of claims 1 to 10, characterized in that: The tightening gun (400) comprises a tightening output shaft (401) and a second connecting member (402), wherein one end of the second connecting member (402) is connected to the tightening output shaft (401). The first batch of head assemblies (31) comprises a first transmission shaft (311) and a first batch of head bodies (312); the first transmission shaft (311) comprises a first connecting end (3111) and a second connecting end (3112); the first connecting end (3111) is connected to the first batch of head bodies (312); and the second connecting end (3112) is used to connect to the other end of the second connecting member (402); The second screwdriver assembly (32) comprises a second transmission shaft (321) and a second screwdriver body (322); the second transmission shaft (321) comprises a third connecting end (3211) and a fourth connecting end (3212); the third connecting end (3211) is connected to the second screwdriver body (322); and the fourth connecting end (3212) is used to connect to the other end of the second connecting member (402).

15. A tightening device according to claim 14, characterized in that: The other end of the second connecting member (402) is provided with an accommodating matching portion (4021), the accommodating matching portion (4021) has an accommodating matching cavity (4022), and the second connecting end portion (3112) or the fourth connecting end portion (3212) can be circumferentially limitedly matched with a wall corresponding to the accommodating matching cavity (4022); The first connecting end portion (3111) is provided with a first guiding portion (3114), and the fourth connecting end portion (3212) is provided with a second guiding portion (3214); along the vertical and upward direction, the cross-sectional area of ​​the first guiding portion (3114) and the cross-sectional area of ​​the second guiding portion (3214) are gradually reduced; The accommodating mating portion (4021) has at least three mating walls (4023), and the accommodating mating portion (4021) includes at least three accommodating mating grooves (4024). In the circumferential direction of the accommodating mating portion (4021), the accommodating mating grooves (4024) are evenly distributed, the mating walls (4023) are evenly distributed, and the walls corresponding to the accommodating mating grooves (4024) and the mating walls (4023) are connected in sequence.

16. A tightening device according to claim 14, characterized in that: A receiving groove (4025) is provided at one end of the second connecting member (402), the opening of the receiving groove (4025) faces the tightening output shaft (401), at least part of the tightening output shaft (401) is located in the receiving groove (4025), and in the radial direction, a gap is left between the tightening output shaft (401) and a wall corresponding to the receiving groove (4025); The tightening output shaft (401) has at least two first matching surface portions (4011) and at least two connecting wall portions (4012), the first matching surface portions (4011) and the connecting wall portions (4012) are evenly distributed in the circumferential direction of the tightening output shaft (401), and any one of the connecting wall portions (4012) is located between two adjacent first matching surface portions (4011); The wall corresponding to the accommodating groove (4025) includes at least two second mating surface portions (4027), the number of the second mating surface portions (4027) is the same as the number of the first mating surface portions (4011), and the second mating surface portions (4027) are evenly distributed along the circumferential direction of the second connecting member (402); The tightening output shaft (401) has a limiting flange portion (4013), and the limiting flange portion (4013) protrudes from the first matching surface portion (4011). One end of the second connecting member (402) is provided with a receiving hole (4026), the receiving hole (4026) is communicated with the receiving groove (4025), and the limiting flange portion (4013) is at least partially located in the receiving hole (4026).

17. A tightening device according to claim 14, characterized in that: The first batch of head assemblies (31) have a first batch of head bases (313), and the first batch of head bases (313) have a first accommodating channel (315), the first accommodating channel (315) vertically penetrates the body of the first batch of head bases (313), and a portion of the first transmission shaft (311) is located in the first accommodating channel (315) and is rotatably matched with a wall corresponding to the first accommodating channel (315); The second screwdriver assembly (32) has a second screwdriver base (323), the second screwdriver base (323) has a second accommodating channel (325), the second accommodating channel (325) vertically penetrates the body of the second screwdriver base (323), a portion of the second transmission shaft (321) is located in the second accommodating channel (325), and is rotatably matched with a wall corresponding to the second accommodating channel (325); In the front-to-back direction, the distance between the axis of the first accommodating channel (315) and the fixing frame (100) is a, the distance between the axis of the second accommodating channel (325) and the fixing frame (100) is b, and the distance between the axis of the tightening gun (400) and the fixing frame (100) is c, where a is equal to b and b is equal to c.

18. A tightening device according to claim 17, characterized in that: A first limiting step portion (3113) is provided on the side wall of the first transmission shaft (311), the first limiting step portion (3113) is located above the first batch of head bases (313), and the outer diameter of the first limiting step portion (3113) is greater than the inner diameter of the first accommodating channel (315); A second limiting step portion (3213) is provided on the side wall of the second transmission shaft (321), the second limiting step portion (3213) is located above the second bit base (323), and the outer diameter of the second limiting step portion (3213) is greater than the inner diameter of the second accommodating channel (325).

19. A tightening device according to claim 17, characterized in that: The first batch of head assemblies (31) comprises a second elastic member (314), and the second elastic member (314) is sleeved on the first transmission shaft (311); The first batch of head bodies (312) are located below the first batch of head bases (313), the second elastic member (314) is located between the first batch of head bases (313) and the first batch of head bodies (312), and two ends of the second elastic member (314) are respectively in contact with the first batch of head bases (313) and the first batch of head bodies (312); The second batch head assembly (32) has a third elastic member (324), and the third elastic member (324) is sleeved on the second transmission shaft (321); The second batch head body (322) is located below the second batch head base (323), the third elastic member (324) is located between the second batch head base (323) and the second batch head body (322), and two ends of the third elastic member (324) are respectively in contact with the second batch head base (323) and the second batch head body (322).

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