Floating rivet gun

Abstract

The present application relates to the technical field of mechanical manufacturing equipment, and discloses a floating riveting clamp, which comprises a floating device and a riveting clamp; the device is provided with the floating device between the machine arm and the riveting clamp, so that the eccentric load generated by riveting is reduced by the first buffer plate, the second buffer plate and the buffer sleeve during transmission to the machine arm, the first buffer plate and the second buffer plate are used to reduce the eccentric load in the up-down direction, the buffer sleeve is used to reduce the eccentric load in the circumferential direction, and the first buffer plate, the second buffer plate and the buffer sleeve can be elastically deformed, so that the machine arm and the riveting clamp are converted from rigid connection to floating connection, thereby reducing the impact on the machine arm, prolonging the service life of the machine arm, and in addition, the floating device is additionally arranged to reduce the eccentric load generated by riveting, so that the machine arm does not need to increase the load, thereby reducing the cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mechanical manufacturing equipment, in particular to a floating riveting clamp. BACKGROUND

[0002] Riveting is a kind of non-detachable connection that connects riveting parts and workpieces together by riveting, which is widely used in the fields of building structure and mechanical manufacturing. For example, in the production of truck frames, riveting process is often used to connect and fix parts together by rivets. However, when riveting, the riveting clamp is moved to the riveting position according to the taught trajectory by the machine arm, and the machine arm is generally rigidly connected with the riveting clamp. Therefore, the rivet die and the rivet are generally not coaxial, which will generate a biasing force during riveting. The biasing force will affect the service life of the machine arm after being transmitted from the riveting position to the machine arm. At present, the biasing force is mainly overcome by selecting a machine arm with larger load, which further increases the cost. SUMMARY

[0003] The present application aims to provide a floating riveting clamp, which can not only reduce the biasing force generated by riveting, prolong the service life of the machine arm, but also reduce the cost and improve the forming quality of the rivet.

[0004] In order to achieve the above-mentioned purpose, the present application provides a floating riveting clamp, which comprises a floating device and a riveting clamp. The floating device comprises a shell, a hanging shaft, and a first buffer plate, a second buffer plate, a fixing sleeve and a buffer sleeve arranged inside the shell. The shell is hollow, and the bottom is provided with a first positioning hole. The bottom surface of the first buffer plate abuts against the bottom wall of the shell, and is provided with a second positioning hole corresponding to the first positioning hole. The bottom surface of the fixing sleeve abuts against the top surface of the first buffer plate, and the fixing sleeve is provided with a fixing hole corresponding to the second positioning hole. The buffer sleeve is sleeved on the outer periphery of the fixing sleeve, and the outer peripheral side surface of the buffer sleeve abuts against the inner peripheral side surface of the shell. The top end of the hanging shaft passes through the first positioning hole and the second positioning hole in sequence, and is installed on the fixing hole. The bottom surface of the second buffer plate abuts against the top surface of the fixing sleeve, and the top surface of the second buffer plate abuts against the top wall of the shell. The riveting clamp is installed at the bottom end of the hanging shaft.

[0005] Optionally, the fixing sleeve comprises a base body and an extension part. The fixing hole is arranged on the base body, and the extension part is located on the outer peripheral side surface of the base body and extends upwardly and obliquely from the bottom end of the base body to the top end of the base body. The buffer sleeve has a mounting hole, and the buffer sleeve is sleeved on the fixing sleeve through the mounting hole. The inner profile of the mounting hole is matched with the outer profile of the fixing sleeve.

[0006] Optionally, the shell comprises a first connecting plate, a second connecting plate, a pipe and a bottom plate, the second connecting plate is arranged on the machine arm, the top end of the pipe is open to a first opening, the bottom end of the pipe is open to form a second opening, the bottom plate is arranged at the bottom end of the pipe and covers the second opening, the first positioning hole is arranged on the bottom plate, the first connecting plate is installed on the top of the pipe and extends away from the pipe along the outer periphery of the pipe, the first connecting plate is detachably installed on the second connecting plate, and the second connecting plate covers the first opening.

[0007] Optionally, the buffer sleeve is made of polyurethane, and the fixing sleeve is made of steel.

[0008] Optionally, the first buffer plate comprises a first plate body and a second plate body, the first plate body and the second plate body are sequentially stacked, the bottom surface of the first plate body abuts against the bottom wall of the shell, and the top surface of the second plate body abuts against the bottom surface of the fixing sleeve; the second buffer plate comprises a third plate body and a fourth plate body, the third plate body and the fourth plate body are sequentially stacked, the bottom surface of the third plate body abuts against the top surface of the fixing sleeve, and the top surface of the fourth plate body abuts against the top wall of the shell; the first plate body and the fourth plate body are made of polyurethane, and the second plate body and the third plate body are made of steel.

[0009] Optionally, a positioning pin is further arranged, the top end of the hanging shaft is threadedly connected with the fixing sleeve, the top of the hanging shaft is provided with a first pin hole, the fixing sleeve is provided with a second pin hole corresponding to the first pin hole, and the positioning pin is arranged in the first pin hole through the second pin hole.

[0010] Optionally, a guide key is further arranged on the hanging shaft, a guide groove corresponding to the guide key is arranged on the riveting tongs, and the guide key is slidably connected to the guide groove.

[0011] Optionally, the riveting tongs comprise a riveting arch, a lower riveting die, an upper riveting die and an oil cylinder, a through hole is arranged on the riveting arch, the bottom of the hanging shaft is arranged in the through hole, the lower riveting die and the upper riveting die are correspondingly arranged on the riveting arch, and the oil cylinder is arranged on the riveting arch and used to drive the upper riveting die to move towards the lower riveting die.

[0012] Optionally, a limiting piece is further arranged at the bottom end of the hanging shaft, the bottom end of the hanging shaft is connected with the limiting piece through the through hole, and the limiting piece is used to prevent the riveting arch from falling off.

[0013] Compared with the prior art, the floating riveting clamp has the beneficial effects that: the floating device is arranged between the machine arm and the riveting clamp, so that the eccentric load generated by riveting is reduced by the first buffer plate, the second buffer plate and the buffer sleeve in the process of being transmitted to the machine arm, the first buffer plate and the second buffer plate are used to reduce the eccentric load in the up-down direction, the buffer sleeve is used to reduce the eccentric load in the circumferential direction, and the machine arm and the riveting clamp are converted from rigid connection to floating connection due to the elastic deformation of the first buffer plate, the second buffer plate and the buffer sleeve, so that the impact on the machine arm is reduced, the service life of the machine arm is prolonged, in addition, the floating device is additionally arranged to reduce the eccentric load generated by riveting, the machine arm does not need to increase the load, thereby reducing the cost and improving the forming quality of the rivet. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a connection structure diagram of the floating riveting clamp and the machine arm of the embodiment of the present application;

[0015] Figure 2 is a schematic diagram of the internal structure of the floating device of the embodiment of the present application.

[0016] In the figure, 1, floating device; 11, shell; 111, first connecting plate; 112, second connecting plate; 113, pipe fitting; 114, bottom plate; 12, hanging shaft; 121, pin hole; 122, guide key; 13, first buffer plate; 131, first plate body; 132, second plate body; 14, second buffer plate; 141, third plate body; 142, fourth plate body; 15, fixing sleeve; 16, buffer sleeve; 17, limiting piece; 2, riveting clamp; 21, riveting bow; 22, lower riveting die; 23, upper riveting die; 24, oil cylinder; 3, machine arm. DETAILED DESCRIPTION

[0017] The specific embodiments of the present application will be further described in detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0018] In the description of the present application, it should be understood that the terms "upper", "top", "bottom", "inner", "outer" and the like used in the present application indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0019] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" are only used for descriptive purpose and cannot be understood as indicating or implying relative importance or implying the number of the technical features indicated. Therefore, the features defined as "first", "second", "third", "fourth", "fifth", "sixth", "seventh" and "eighth" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "plurality" is two or more, unless otherwise specifically limited.

[0020] As shown in Figure 1 and Figure 2 , the floating riveting clamp of the preferred embodiment of the present application comprises a floating device 1 and a riveting clamp 2; the floating device 1 comprises a shell 11, a hanging shaft 12, and a first buffer plate 13, a second buffer plate 14, a fixing sleeve 15 and a buffer sleeve 16 arranged inside the shell 11; the shell 11 is hollow inside and is provided with a first positioning hole at the bottom; the bottom surface of the first buffer plate 13 abuts against the bottom wall of the shell 11 and is provided with a second positioning hole corresponding to the first positioning hole; the bottom surface of the fixing sleeve 15 abuts against the top surface of the first buffer plate 13, and the fixing sleeve 15 is provided with a fixing hole corresponding to the second positioning hole; the buffer sleeve 16 is sleeved on the outer periphery of the fixing sleeve 15, and the outer peripheral side surface of the buffer sleeve 16 abuts against the inner peripheral side surface of the shell 11; the top end of the hanging shaft 12 passes through the first positioning hole and the second positioning hole in sequence and is installed on the fixing hole; the bottom surface of the second buffer plate 14 abuts against the top surface of the fixing sleeve 15, and the top surface of the second buffer plate 14 abuts against the top wall of the shell 11; the riveting clamp 2 is installed at the bottom end of the hanging shaft 12.

[0021] Based on the above scheme, the device makes the eccentric load generated by riveting be reduced by the first buffer plate 13, the second buffer plate 14 and the buffer sleeve 16 in the process of being transmitted to the machine arm 3, wherein the first buffer plate 13 and the second buffer plate 14 are used to reduce the eccentric load in the up-down direction, and the buffer sleeve 16 is used to reduce the eccentric load in the circumferential direction, and because the first buffer plate 13, the second buffer plate 14 and the buffer sleeve 16 can be elastically deformed, the machine arm 3 is converted from rigid connection to floating connection with the riveting clamp 2, so as to reduce the impact on the machine arm 3, prolong the service life of the machine arm 3, and in addition, because the floating device 1 is additionally arranged to reduce the eccentric load generated by riveting, the machine arm 3 does not need to increase the load, thereby reducing the cost and improving the forming quality of the rivet.

[0022] As shown in Figure 2As shown, in order to increase the preload of the floating device 1, the fixed sleeve 15 includes a base and an extension. The fixed hole is provided on the base, and the extension is located on the outer peripheral side of the base and extends obliquely upward along the bottom end of the base to the top end of the base. The buffer sleeve 16 has a mounting hole. The buffer sleeve 16 is fitted onto the fixed sleeve 15 through the mounting hole, and the inner contour of the mounting hole is adapted to the outer contour of the fixed sleeve 15. Under the action of the preload generated between the extension and the mounting hole, the mounting hole will fit tightly against the outer surface of the fixed sleeve 15, so that the hanging shaft 12 will not loosen in the horizontal direction.

[0023] like Figure 2 As shown, for ease of production and processing, the outer casing 11 includes a first connecting plate 111, a second connecting plate 112, a pipe fitting 113, and a base plate 114. The second connecting plate 112 is mounted on the robot arm 3. The top end of the pipe fitting 113 has a first opening, and the bottom end of the pipe fitting 113 has a second opening. The base plate 114 is mounted on the bottom end of the pipe fitting 113 and covers the second opening. A first positioning hole is provided on the base plate 114. The first connecting plate 111 is mounted on the top of the pipe fitting 113, and the first connecting plate 111 extends along the outer periphery of the pipe fitting 113 in a direction away from the pipe fitting 113. The connecting plate 111 is detachably mounted on the second connecting plate 112, and the second connecting plate 112 covers the first opening. The first connecting plate 111 mainly serves as a flange mounting surface and is detachably connected to the second connecting plate 112 on the robot arm 3. The pipe fitting 113 and the base plate 114 are mainly used to fill other components. In this embodiment, square steel pipes are selected as pipe fittings 113 to prevent relative rotation of other components inside the pipe fitting 113. It should be noted that in this embodiment, the connection of the first connecting plate 111, the pipe fitting 113 and the base plate 114 is all welded.

[0024] Optionally, in order to ensure both cushioning and strength, the cushioning sleeve 16 is made of polyurethane and the fixing sleeve 15 is made of steel.

[0025] like Figure 2 As shown, in order to ensure both cushioning and strength, the first buffer plate 13 includes a first plate 131 and a second plate 132, which are stacked sequentially. The bottom surface of the first plate 131 abuts against the bottom wall of the outer shell 11, and the top surface of the second plate 132 abuts against the bottom surface of the fixing sleeve 15. The second buffer plate 14 includes a third plate 141 and a fourth plate 142, which are stacked sequentially. The bottom surface of the third plate 141 abuts against the top surface of the fixing sleeve 15, and the top surface of the fourth plate 142 abuts against the top wall of the outer shell 11. The first plate 131 and the fourth plate 142 are made of polyurethane, and the second plate 132 and the third plate 141 are made of steel.

[0026] Particularly, the polyurethane has elastomer properties between plastic and rubber, and the hardness has multiple specifications, and appropriate hardness can be selected according to the riveting working condition, and the polyurethane material can ensure that the riveting clamp does not shake and does not have relative displacement during normal movement of the machine arm 3, and the posture is accurate, and the accuracy of movement is not affected.

[0027] As shown in Figure 2 , in order to facilitate assembly, the height position of the hanging shaft 12 is still accurate after multiple disassembly and assembly, and a positioning pin is further included, the top end of the hanging shaft 12 is threadedly connected with a fixed sleeve 15, the top of the hanging shaft 12 is provided with a first pin hole 121, and the fixed sleeve 15 is provided with a second pin hole 121 corresponding to the first pin hole 121, and the positioning pin is installed in the first pin hole 121 through the second pin hole 121.

[0028] As shown in Figure 2 , in order to facilitate the sliding of the riveting clamp 2 in the up-down direction, the hanging shaft 12 is further provided with a guide key 122, and the riveting clamp 2 is provided with a guide groove matched with the guide key 122, and the guide key 122 is slidingly connected to the guide groove.

[0029] As shown in Figure 1 , in order to facilitate use, the riveting clamp 2 includes a riveting arch 21, a lower riveting die 22, an upper riveting die 23, and an oil cylinder 24, the riveting arch 21 is provided with a through hole, the bottom of the hanging shaft 12 is installed in the through hole, the lower riveting die 22 and the upper riveting die 23 are correspondingly installed on the riveting arch 21, and the oil cylinder 24 is installed on the riveting arch 21 and used to drive the upper riveting die 23 to move towards the lower riveting die 22.

[0030] As shown in Figure 1 and Figure 2 , in order to avoid disengagement of the riveting arch 21 from the hanging shaft 12, the bottom end of the hanging shaft 12 is further provided with a limiting piece 17, the bottom end of the hanging shaft 12 is connected with the limiting piece 17 through the through hole, and the limiting piece 17 is used to prevent the riveting arch 21 from falling off.

[0031] In summary, the embodiment of the present application provides a floating type riveting clamp, the floating device 1 is arranged between the machine arm 3 and the riveting clamp 2, so that the eccentric load generated by riveting is reduced by the first buffer plate 13, the second buffer plate 14 and the buffer sleeve 16 in the process of being transmitted to the machine arm 3, the first buffer plate 13 and the second buffer plate 14 are used to reduce the eccentric load in the up-down direction, the buffer sleeve 16 is used to reduce the eccentric load in the circumferential direction, and the first buffer plate 13, the second buffer plate 14 and the buffer sleeve 16 can be elastically deformed, so that the machine arm 3 is converted from rigid connection to floating connection with the riveting clamp 2, thereby reducing the impact on the machine arm 3 and prolonging the service life of the machine arm 3, in addition, the floating device 1 is additionally arranged to reduce the eccentric load generated by riveting, the machine arm 3 does not need to increase the load, thereby reducing the cost and improving the forming quality of the rivet.

[0032] The above merely preferred embodiments of the present application, it should be noted that for those of ordinary skill in the art, without departing from the technical principles of the present application, can also make a number of improvements and substitutions, these improvements and substitutions should also be considered as the protection scope of the present application.

Claims

1. A floating rivet gun characterized by, The utility model relates to a floating device and riveting pincers, and relates to the technical field of riveting pincers. The floating device comprises a shell, a hanging shaft, a first buffer plate, a second buffer plate, a fixing sleeve and a buffer sleeve. The shell is hollow inside and is provided with a first positioning hole in the bottom. The bottom surface of the first buffer plate is in abutment with the bottom wall of the shell and is provided with a second positioning hole corresponding to the first positioning hole. The bottom surface of the fixing sleeve is in abutment with the top surface of the first buffer plate, and the fixing sleeve is provided with a fixing hole corresponding to the second positioning hole. The buffer sleeve is sleeved on the outer periphery of the fixing sleeve, and the outer peripheral side surface of the buffer sleeve is in abutment with the inner peripheral side surface of the shell. The top end of the hanging shaft passes through the first positioning hole and the second positioning hole in sequence and is installed on the fixing hole. The bottom surface of the second buffer plate is in abutment with the top surface of the fixing sleeve, and the top surface of the second buffer plate is in abutment with the top wall of the shell. The riveting pincers are installed on the bottom end of the hanging shaft. The fixing sleeve comprises a base body and an extension part, the fixing hole is arranged on the base body, the extension part is located on the outer peripheral side surface of the base body and extends upwardly along the bottom end of the base body to the top end of the base body, the buffer sleeve has a mounting hole, the buffer sleeve is sleeved on the fixing sleeve through the mounting hole, and the inner profile of the mounting hole is matched with the outer profile of the fixing sleeve.

2. The floating rivet set of claim 1, wherein, The shell comprises a first connecting plate, a second connecting plate, a pipe and a bottom plate, the second connecting plate is arranged on a machine arm, the top end of the pipe is open to form a first opening, the bottom end of the pipe is open to form a second opening, the bottom plate is arranged on the bottom end of the pipe and covers the second opening, the first positioning hole is arranged on the bottom plate, the first connecting plate is installed on the top of the pipe and extends away from the pipe along the outer periphery of the pipe, the first connecting plate is detachably installed on the second connecting plate, and the second connecting plate covers the first opening.

3. The floating rivet set of claim 1, wherein, The buffer sleeve is made of polyurethane, and the fixing sleeve is made of steel.

4. The floating rivet set of claim 1 wherein, The first buffer plate comprises a first plate body and a second plate body, the first plate body and the second plate body are stacked in sequence, the bottom surface of the first plate body is in abutment with the bottom wall of the shell, and the top surface of the second plate body is in abutment with the bottom surface of the fixing sleeve.

5. The floating rivet set of claim 1 wherein, The second buffer plate comprises a third plate body and a fourth plate body, the third plate body and the fourth plate body are stacked in sequence, the bottom surface of the third plate body is in abutment with the top surface of the fixing sleeve, and the top surface of the fourth plate body is in abutment with the top wall of the shell. The first plate body and the fourth plate body are made of polyurethane, and the second plate body and the third plate body are made of steel. The top end of the hanging shaft is threadedly connected with the fixing sleeve, the top of the hanging shaft is provided with a first pin hole, the fixing sleeve is provided with a second pin hole corresponding to the first pin hole, and the positioning pin passes through the second pin hole and is installed in the first pin hole.

6. The floating rivet set of claim 1 wherein, The hanging shaft is further provided with a guide key, the riveting pincers are provided with a guide groove matched with the guide key, and the guide key is slidably connected with the guide groove.

7. The floating rivet set of claim 1 wherein, ​ 8. The floating rivet set of claim 1, wherein, The riveting tongs comprise a riveting arch, a lower riveting die, an upper riveting die and an oil cylinder, the riveting arch is provided with a through hole, the bottom of the hanging shaft is installed in the through hole, the lower riveting die and the upper riveting die are correspondingly installed on the riveting arch, and the oil cylinder is installed on the riveting arch and used for driving the upper riveting die to move towards the lower riveting die.

9. The floating rivet set of claim 8, wherein, The bottom end of the hanging shaft is further provided with a limiting piece, the bottom end of the hanging shaft is connected with the limiting piece through the through hole, and the limiting piece is used for preventing the riveting arch from falling off.

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