Electric gun sleeve connecting structure and tightening tool

Abstract

The utility model relates to an electric gun sleeve connecting structure and a tightening tool. An elastic piece is arranged in a first containing groove in a sleeve contact surface of a gun head body; two ends of the sleeve connecting pin are respectively a cylindrical end and a hemispherical end; in the axial movement process of the gun head body in the sleeve, the sleeve connecting pin is firstly propped against the inner wall of the sleeve so as to compress the elastic piece, and when the gun head body moves to a designed position, the sleeve connecting pin is reset under the action of the elastic piece so as to be inserted into the connecting hole of the sleeve, so that connection is completed; when a fixed sleeve needs to be used for tightening the tool, the cylindrical end is arranged on the outer side so that the cylindrical end can be connected with the sleeve in an inserted mode, and the cylindrical end is a flat head so that connection can be reinforced; when a plurality of sleeves need to be used by the tightening tool, the sleeve connecting pins are taken out, and then the hemispherical ends are arranged on the outer side so that the hemispherical ends can be connected with the sleeves in an inserted mode; the arc surface of the hemispherical end is matched with the elastic piece, so that the sleeve can be connected, the sleeve can be conveniently and quickly taken out in the axial direction under the action of certain force, and the sleeve can be conveniently switched.

Description

Technical Field

[0001] The present application relates to the technical field of tightening tools for production lines of main engine plants, and in particular to an electric gun sleeve connection structure and a tightening tool. Background Art

[0002] At present, in the vehicle assembly line production process of the main engine factory, due to the mixed production mode, there will be differences in the production processes of each body. At one workstation, there is a situation where one tightening tool uses one fixed socket, and there is also a situation where one tightening tool uses multiple fixed sockets.

[0003] For workstations that require sleeve switching, the tightening sleeve is mostly in the form of a magnetic joint or a drag ring. The magnetic joint solution provides a certain adsorption force through magnetic attraction to prevent the sleeve from axially dislodging, but generally due to the size of the joint, the magnetic force provided is limited. This type of tightening tool cannot be flexibly switched to a working condition using a fixed sleeve, that is, a tightening tool uses a fixed sleeve. The drag ring solution has a complex structure, a large operating force when replacing the sleeve, cumbersome steps, low efficiency, and high cost.

[0004] Therefore, a special sleeve connection structure is needed, which can satisfy both the fast switching mode when using multiple sleeves and the mode when using a single sleeve. Utility Model Content

[0005] The embodiments of the present application provide an electric gun sleeve connection structure and a tightening tool to solve the problem that the sleeve connection structure in the related art cannot simultaneously meet the fast switching mode when using multiple sleeves and the mode when using a single sleeve.

[0006] In a first aspect, an electric gun sleeve connection structure is provided, comprising:

[0007] The gun head body has at least one sleeve contact surface provided with a first receiving groove, and the first receiving groove is arranged perpendicular to the central axis of the gun head body;

[0008] An elastic member, which is disposed in the first receiving groove;

[0009] The sleeve connecting pin has two ends, a cylindrical end and a hemispherical end respectively; the cylindrical end and the hemispherical end selectively extend into the first accommodating groove and contact the elastic member.

[0010] In some embodiments, the first receiving groove is a cylindrical groove;

[0011] A buffer block is provided between the elastic member and the sleeve connecting pin, and the diameter of the buffer block is equal to the diameter of the cylindrical groove.

[0012] In some embodiments, the gun head body is further provided with a second receiving groove; in the direction of the central axis, the second receiving groove and the first receiving groove have an overlapping communication area; the second receiving groove and the first receiving groove are arranged perpendicular to each other, and are also arranged perpendicular to the central axis;

[0013] A movable limiting member is arranged in the second accommodating groove, and the limiting member is engaged with the limiting portion of the sleeve connecting pin; the limiting portion is located between the cylindrical end and the hemispherical end.

[0014] In some embodiments, a first slot is formed on the sleeve connecting pin, and the first slot has a designed length in the length direction of the first accommodating groove to form the limiting portion.

[0015] In some embodiments, the stopper is a round rod; the designed length is an integer multiple of the diameter of the round rod;

[0016] Both ends of the first clamping groove in the length direction have arc transition surfaces adapted to the round rod.

[0017] In some embodiments, the stopper is a square rod; the cross section of the square rod is a rectangle, and the designed length is an integer multiple of the length of the contact edge; the contact edge is a side of the rectangle that contacts the bottom wall of the first slot;

[0018] Both ends of the first slot in the length direction have fitting surfaces adapted to the square rod.

[0019] In some embodiments, the length of the limiting member is equal to the depth of the second receiving groove; and the second receiving groove passes through the gun head body.

[0020] In some embodiments, the gun tip body is cylindrical, and the cross section of the cylinder is rectangular, pentagonal or regular hexagonal.

[0021] In some embodiments, the radii of the cylindrical end and the hemispherical end are equal, and the outer surface of the hemispherical end is a smooth surface.

[0022] In a second aspect, a tightening tool is provided, comprising:

[0023] The servo electric gun body, whose working end is connected to the electric gun sleeve connection structure as above;

[0024] The central groove of the sleeve is fitted with each sleeve contact surface of the gun head body; a connecting hole is arranged on the outer wall of the sleeve, and the sleeve connecting pin is plugged into the connecting hole.

[0025] The beneficial effects of the technical solution provided by this application include:

[0026] The embodiment of the present application provides an electric gun sleeve connection structure and a tightening tool. Since a first accommodating groove is provided on the sleeve contact surface of the gun head body, the first accommodating groove is perpendicularly arranged to the central axis of the gun head body, and an elastic member is provided inside; the two ends of the sleeve connecting pin are respectively a cylindrical end and a hemispherical end; during the axial movement of the gun head body in the sleeve, the sleeve connecting pin is firstly supported by the inner wall of the sleeve to compress the elastic member, and when it moves to the designed position, the sleeve connecting pin is reset under the action of the elastic member to be plugged into the connecting hole of the sleeve to complete the connection; when a fixed sleeve is required to be used for the tightening tool, the cylindrical end is arranged on the outside to make it plugged into the sleeve, and the cylindrical end is a flat head to strengthen the connection; when multiple sleeves are required to be used for the tightening tool, the sleeve connecting pin is taken out, and then the hemispherical end is arranged on the outside to make it plugged into the sleeve; the arc surface of the hemispherical end cooperates with the elastic member to meet the connection of the sleeve, and can also facilitate the axial rapid removal of the sleeve under the action of a certain force, so as to facilitate the switching between sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 An exploded schematic diagram of the electric gun sleeve connection structure provided in an embodiment of the present application;

[0029] Figure 2 A schematic diagram of an electric gun sleeve connection structure and sleeve connection provided in an embodiment of the present application;

[0030] Figure 3 An internal schematic diagram of the electric gun sleeve connection structure provided in an embodiment of the present application;

[0031] Figure 4 A schematic diagram of a sleeve connecting pin in a first working condition provided in an embodiment of the present application;

[0032] Figure 5 A schematic diagram of a sleeve connecting pin in a second working condition provided in an embodiment of the present application.

[0033] In the figure: 1, gun head body; 2, sleeve contact surface; 3, first receiving groove; 4, elastic member; 5, sleeve connecting pin; 5000, first slot; 5001, arc transition surface; 6, cylindrical end; 7, hemispherical end; 8, buffer pad; 9, second receiving groove; 10, limit member; 11, sleeve; 12, connecting hole. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0035] The following should be understood about this application:

[0036] The current servo electric gun sleeve quick replacement structure, such as that introduced in CN205572281U, includes a first connector, a drag ring and a second connector. The first connector is a connecting column for connecting the servo electric gun, and the second connector is a connecting column for connecting the sleeve. The first connector and the second connector are connecting columns for connecting the sleeve. The first connector and the second connector are plugged in with each other, and the drag ring is sleeved at the plug-in place of the first connector and the second connector through a drag assembly. The drag assembly includes a compression spring, a plurality of balls and a wire retaining ring. The side wall of the plug-in end of the first connector is provided with a clearance hole adapted to the balls. The plurality of balls are located in the corresponding clearance holes, and the wire retaining ring is sleeved on the outside of the plug-in end of the first connector. The compression spring sleeve is provided on the outer wall of the plug-in end of the first connector and can cooperate with the limiting step of the plug-in end of the first connector to realize rapid installation and rapid separation of the drag ring driven by the sleeve.

[0037] However, due to the use of a wire retaining ring and 6 ball structures, the operating force is large, which is not convenient for quick operation of the sleeve. The drag assembly has a complex structure, consisting of a compression spring, 6 balls and a wire retaining ring, with poor assembly performance, high cost and poor maintainability. The tightening gun and the sleeve are not directly connected, but need to be matched through a second joint, which causes torque loss.

[0038] Therefore, while satisfying the fast switching mode when using multiple sleeves and the mode when using a single sleeve, it is also necessary to have the characteristics of simple structure, easy maintenance, and no torque loss.

[0039] The embodiments of the present application provide an electric gun sleeve connection structure and a tightening tool to solve the problem in the related art that the sleeve connection structure cannot simultaneously meet the fast switching mode when using multiple sleeves and the mode when using a single sleeve.

[0040] See also Figure 1-Figure 3 , an electric gun sleeve connection structure, comprising:

[0041] The gun head body 1 has at least one sleeve contact surface 2 on which a first receiving groove 3 is provided, and the first receiving groove 3 is arranged perpendicular to the central axis of the gun head body 1;

[0042] An elastic member 4 is disposed in the first receiving groove 3;

[0043] The sleeve connecting pin 5 has two ends, a cylindrical end 6 and a hemispherical end 7 . Either the cylindrical end 6 or the hemispherical end 7 extends into the first receiving groove 3 and contacts the elastic member 4 .

[0044] During the axial movement of the gun head body 1 in the sleeve 11, the sleeve connecting pin 5 is first held by the inner wall of the sleeve 11 to compress the elastic member 4. When it moves to the designed position, the sleeve connecting pin 5 is reset under the action of the elastic member 4 to be plugged into the connecting hole 12 of the sleeve 11 to complete the connection; when a fixed sleeve is required for tightening the tool, the cylindrical end 6 is set on the outside to make it plugged into the sleeve 11. The cylindrical end 6 is a flat head to strengthen the connection; when multiple sleeves are required for tightening the tool, the sleeve connecting pin 5 is taken out, and then the hemispherical end 7 is set on the outside to make it plugged into the sleeve 11; the arc surface of the hemispherical end 7 and the elastic member can meet the connection of the sleeve 11, and can also facilitate the axial rapid removal of the sleeve 11 under the action of a certain force, and facilitate the switching between sleeves 11. The radius of the cylindrical end 6 and the hemispherical end 7 is equal, and the outer surface of the hemispherical end 7 is a smooth surface.

[0045] You can refer to the following Figure 4 and Figure 5 , to explain in detail the connection of two situations:

[0046] Figure 4 What is shown is the connection between the cylindrical end 6 and the sleeve 11. After being subjected to axial force, since there are obstructions at the four positions of the cylindrical end 6, namely, the upper, lower, left and right positions, if axial displacement is required, the force required must be enough to deform and bend the sleeve connecting pin 5, so the axial connection is stable.

[0047] Figure 5 The case where the hemispherical end 7 is connected to the sleeve 11 is shown. The two ends of the diameter of the spherical surface of the hemispherical end 7 are in point contact with the sleeve 11. After the axial force is applied, the force acting on the spherical surface will generate a component force of compressing the elastic member 4. Therefore, the force that needs to be overcome to remove the sleeve 11 in this form is the friction force of the spherical surface and the elastic force of the elastic member 4. In this way, the sleeve 11 can be connected and the sleeve can be switched conveniently to meet different usage requirements. In this form, only the hemispherical end 7 must be connected to the sleeve 11.

[0048] When switching between the two usage conditions, the gun head body 1 needs to be separated from the sleeve 11, and then the sleeve connecting pin 5 is taken out for replacement.

[0049] This shows that the structure is simple and easy to maintain. In addition, it can also meet the needs of the fast switching mode when using multiple sleeves and the mode when using a single sleeve.

[0050] In some preferred embodiments, in order to prevent the elastic member 4 from receiving inconsistent force, the following settings are provided:

[0051] The first accommodating groove 3 is a cylindrical groove; a buffer block 8 is provided between the elastic member 4 and the sleeve connecting pin 5, and the diameter of the buffer block 8 is equal to the diameter of the cylindrical groove.

[0052] In some preferred embodiments, the above structure has the problem that the elastic member 4 exerts too much force on the sleeve connecting pin 5, causing the sleeve connecting pin 5 to fall out of the gun head body 1, so the following configuration is provided:

[0053] The gun head body 1 is also provided with a second receiving groove 9; in the direction of the central axis, the second receiving groove 9 and the first receiving groove 3 have an overlapping communication area; the second receiving groove 9 and the first receiving groove 3 are arranged perpendicularly to each other, and are also arranged perpendicularly to the central axis;

[0054] A movable limiting member 10 is disposed in the second accommodating groove 9 , and the limiting member 10 is engaged with a limiting portion of the sleeve connecting pin 5 ; the limiting portion is located between the cylindrical end 6 and the hemispherical end 7 .

[0055] The above-mentioned limit member 10 can have three functions: first, to prevent the sleeve connecting pin 5 from falling off; second, to ensure that the limit member 10 moves without exceeding the designed distance; third, the limit member 10 can move in the second accommodating groove 9 to facilitate the disassembly of the limit member 10, so as to achieve the purpose of facilitating the replacement of the two ends of the sleeve connecting pin 5.

[0056] In the direction of the central axis, the second receiving groove 9 and the first receiving groove 3 have an overlapping connection area; it can be understood that:

[0057] The first one is that the horizontal plane where the axis of the second accommodating groove 9 is located is above the horizontal plane where the axis of the first accommodating groove 3 is located; in the direction of the central axis, there is an overlapping connection area between the lower half of the second accommodating groove 9 and the upper half of the first accommodating groove 3.

[0058] The second type is that the horizontal plane where the axis of the second accommodating groove 9 is located is below the horizontal plane where the axis of the first accommodating groove 3 is located; in the direction of the central axis, there is an overlapping connection area between the upper half of the second accommodating groove 9 and the lower half of the first accommodating groove 3.

[0059] Furthermore, in order to achieve the maximum moving distance of the sleeve connecting pin 5, a first slot 5000 is provided on the sleeve connecting pin 5. The first slot 5000 has a designed length in the length direction of the first accommodating groove 3 to form a limiting portion.

[0060] Correspondingly, the stopper 10 is a round rod, and the designed length is an integral multiple of the diameter of the round rod. The first slot 5000 has arc transition surfaces 5001 adapted to the round rod at both ends in the length direction.

[0061] Alternatively, the stopper 10 is a square rod; the cross section of the square rod is a rectangle, and the designed length is an integer multiple of the length of the contact edge; the contact edge is the side of the rectangle that contacts the bottom wall of the first slot 5000;

[0062] Both ends of the first slot 5000 in the length direction have fitting surfaces adapted to the square rod.

[0063] Furthermore, to facilitate the removal and disassembly of the stopper 10, the length of the stopper 10 is equal to the depth of the second receiving groove 9; the second receiving groove 9 penetrates the gun head body 1. When disassembling, the stopper 10 can be ejected using an ejector pin.

[0064] In the case of a limiter 10, when one tightening tool corresponds to one sleeve 11, when the sleeve needs to be disassembled, that is, when the cylindrical end 6 is connected, the sleeve connecting pin 5 is pressed with a ejector pin, and the elastic part 4 is compressed. At this time, the sleeve connecting pin 5 moves inward and is not connected to the sleeve 11.

[0065] When one tightening tool corresponds to one sleeve 11, that is, when the hemispherical end 7 is connected, no ejector is needed. Only axial force needs to be applied to achieve rapid switching between multiple sleeves and direct plug-in and pull-out operations.

[0066] In the above, the gun head body 1 is cylindrical, and the cross section of the cylindrical body is rectangular, pentagonal or regular hexagonal. Its shape is determined according to the center groove in the sleeve 11.

[0067] In the above embodiments, the description is based on a first receiving groove 3 and a second receiving groove 9, that is, the sleeve contact surface 2 where the two are located is adjacent and perpendicular to each other. Therefore, the present application includes but is not limited to the above situation, and the gun head body 1 can have multiple sleeve connecting pins 5, and of course the corresponding limit members 10 can be set as needed.

[0068] Of course, in order to achieve the purpose of simple structure and convenient maintenance, the above connection form of a sleeve connecting pin 5 and a limit member 10 is the most preferred solution and is also the solution actually used.

[0069] The present application also proposes a tightening tool, which comprises:

[0070] The servo electric gun body has a working end connected to the above electric gun sleeve connection structure;

[0071] The central groove of the sleeve 11 fits with each sleeve contact surface 2 of the gun head body 1 ; a connecting hole 12 is provided on the outer wall of the sleeve 11 , and the sleeve connecting pin 5 is plugged into the connecting hole 12 .

[0072] The above electric gun sleeve connection structure realizes the convenient switching between the first working condition and the second working condition through a simple structure. At the same time, the structure is simple, which can reduce the manufacturing difficulty and maintenance cost. The first working condition corresponds to one tightening tool corresponding to one sleeve; in addition, the gun head body 1 and the sleeve are directly connected to reduce torque loss. In the first working condition, without the help of external tools, the sleeve will not fall out due to axial force, and the sleeve and the gun head body are firmly connected. In the second working condition, the sleeve can be switched quickly and easily, saving time and effort.

[0073] The above sleeve connecting pin 5 is a double-headed optional structure:

[0074] The flat working end - cylindrical end 6 prevents the sleeve from axially dislodging, is stable and reliable, and thus stably fixes the sleeve.

[0075] The round head working end - the hemispherical end 7 locks the sleeve with a small force, while ensuring a certain degree of connectivity, the sleeve can be easily and conveniently replaced.

[0076] The electric gun refers to the servo electric gun.

[0077] In the description of the present application, it should be noted that the terms "upper", "lower", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0078] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0079] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. An electric gun sleeve connection structure, characterized in that: It includes: A gun head body (1), wherein at least one sleeve contact surface (2) is provided with a first receiving groove (3), and the first receiving groove (3) is arranged perpendicular to the central axis of the gun head body (1); An elastic member (4) is arranged in the first receiving groove (3); The sleeve connecting pin (5) has two ends, a cylindrical end (6) and a hemispherical end (7); the cylindrical end (6) and the hemispherical end (7) are selectively inserted into the first receiving groove (3) and contact the elastic member (4).

2. The electric gun sleeve connection structure according to claim 1, characterized in that: The first accommodating groove (3) is a cylindrical groove; A buffer block (8) is provided between the elastic member (4) and the sleeve connecting pin (5), and the diameter of the buffer block (8) is equal to the diameter of the cylindrical groove.

3. The electric gun sleeve connection structure according to claim 1, characterized in that: The gun head body (1) is also provided with a second receiving groove (9); in the direction of the central axis, the second receiving groove (9) and the first receiving groove (3) have an overlapping connection area; the second receiving groove (9) and the first receiving groove (3) are arranged perpendicular to each other, and are also arranged perpendicular to the central axis; A movable limiting member (10) is provided in the second accommodating groove (9), and the limiting member (10) is engaged with the limiting portion of the sleeve connecting pin (5); the limiting portion is located between the cylindrical end (6) and the hemispherical end (7).

4. The electric gun sleeve connection structure according to claim 3, characterized in that: The sleeve connecting pin (5) is provided with a first clamping groove (5000), and the first clamping groove (5000) has a designed length in the length direction of the first accommodating groove (3) to form the limiting portion.

5. The electric gun sleeve connection structure according to claim 4, characterized in that: The limiting member (10) is a round rod; the designed length is an integer multiple of the diameter of the round rod; Both ends of the first clamping groove (5000) in the length direction have arc transition surfaces (5001) adapted to the round rod.

6. The electric gun sleeve connection structure according to claim 4, characterized in that: The limiting member (10) is a square rod; the cross section of the square rod is a rectangle, and the designed length is an integer multiple of the length of the contact edge; the contact edge is the side of the rectangle that contacts the bottom wall of the first slot (5000); Both ends of the first slot (5000) in the length direction have fitting surfaces adapted to the square rod.

7. The electric gun sleeve connection structure according to claim 4, characterized in that: The length of the limiting member (10) is equal to the depth of the second accommodating groove (9); and the second accommodating groove (9) passes through the gun head body (1).

8. The electric gun sleeve connection structure according to claim 1, characterized in that: The gun head body (1) is cylindrical, and the cross section of the cylinder is rectangular, pentagonal or regular hexagonal.

9. The electric gun sleeve connection structure according to claim 1, characterized in that: The radii of the cylindrical end (6) and the hemispherical end (7) are equal, and the outer surface of the hemispherical end (7) is a smooth surface.

10. A tightening tool, characterized in that: It includes: A servo electric gun body, the working end of which is connected to the electric gun sleeve connection structure as described in any one of claims 1 to 9; The sleeve (11) has a central groove therein that fits each sleeve contact surface (2) of the gun head body (1); a connecting hole (12) is provided on the outer wall of the sleeve (11), and a sleeve connecting pin (5) is plugged into the connecting hole (12).

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