An electric screwing device for assembling automobile parts

Abstract

The present invention discloses an electric screwing device for assembling automobile parts, comprising a zero-gravity balance arm and a screwing mechanism, wherein the screwing mechanism is composed of an electric screwing gun and a screwing gun clamping plate, the electric screwing gun is provided with a control switch, and a screw bit is connected to a motor rotor in the electric screwing gun via a coupling, the zero-gravity balance arm is movably arranged on a first guide rod and a second guide rod on a base, the upper end of the first guide rod is provided with a driving structure, the zero-gravity balance arm is driven up and down by the driving structure, and a supporting base plate is fixedly installed at the front end of the zero-gravity balance arm; the screws during the installation of automobile parts are fixedly tightened by arranging the screwing mechanism composed of the electric screwing gun and the screwing gun clamping plate, and a displacement sensor is installed on the sensor support plate, so that the tightening depth of the screws is detected by the displacement sensor, thereby ensuring that the screws are tightened in place during the installation of the parts, thereby ensuring the stability of the installed parts.

Description

Technical Field

[0001] The invention relates to the technical field related to automobile parts assembly, in particular to an electric screwing device for automobile parts assembly. Background Art

[0002] Assembly refers to the process of assembling parts according to specified technical requirements and then commissioning and inspecting them to produce a qualified product. Assembly begins with the design of assembly drawings; products are composed of several parts and components. The labor process of joining several parts into a component, or joining several parts and components into a product, according to specified technical requirements, is called assembly. The former is called component assembly, and the latter is called final assembly. It generally includes assembly, adjustment, inspection and testing, painting, and packaging. The automotive parts assembly process inevitably involves tightening screws. Traditional screw tightening mechanisms used in automotive assembly are relatively simple, and workers typically rely on their own sense of feel during assembly to control the degree of screw insertion. This can easily lead to over-tightening or under-tightening of screws, thus affecting the quality of the final product. Summary of the Invention

[0003] The object of the present invention is to provide an electric screwing device for assembling automobile parts to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: an electric screwing device for assembling automobile parts, comprising a zero-gravity balance arm and a screwing mechanism, wherein the screwing mechanism is composed of an electric tightening gun and a tightening gun clamping plate, the electric tightening gun is provided with a control switch, and a screwdriver is connected to a screwdriver bit on a motor rotor in the electric tightening gun through a coupling, the zero-gravity balance arm is movably arranged on a first guide rod and a second guide rod on a base, the upper end of the first guide rod is provided with a driving structure, the zero-gravity balance arm is driven up and down by the driving structure, the front end of the zero-gravity balance arm is fixedly installed with a supporting base plate, the supporting base plate is an L-shaped plate structure, and a protective cover is provided on the outer side of the supporting base plate, and a through hole is opened on the horizontal plate portion of the tightening gun clamping plate, and a rolling bearing is fixedly installed in the through hole by a locking nut, and the screwdriver bit passes through the inner ring of the rolling bearing, and the vertical plate upper end of the supporting base plate is fixedly installed with The cam is provided with a toothed groove, and the toothed groove is provided with a toothed groove, and the toothed groove is provided with a toothed groove on the toothed groove.

[0005] Preferably, an oil-free bushing is provided in the outer cylinder, and the oil-free bushing is fixed by a bushing retaining ring fixedly installed on the lower surface of the outer cylinder and a limiting ring on the inner wall of the outer cylinder, and the reference inner cylinder is movably arranged in the inner ring of the oil-free bushing.

[0006] Preferably, the displacement sensor detection head at the lower end of the displacement sensor is arranged directly above the reference block on the side of the reference inner cylinder.

[0007] Preferably, the mounting ring is an annular plate, and a first mounting hole is opened on the plate body, and six first mounting holes are arranged at equal intervals.

[0008] Preferably, the connecting member is composed of a connecting plate, a first screw and a second screw. The setting position of the first screw corresponds to the position of the first mounting hole. The connecting member is set by the first screw passing through the first mounting hole and is positioned by the first fixing nut.

[0009] Preferably, the support member is composed of an upper support plate, a connecting rod and a lower support plate. The upper support plate and the lower support plate are both annular plates, and a second mounting hole is provided on the upper support plate. The setting position of the second mounting hole corresponds to the position of the second screw on the connecting member, and the upper support plate is positioned and fixed on the second screw by a second fixing nut and a third fixing nut.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. A screwing mechanism consisting of an electric screwdriver and a screwdriver clamping plate is provided to tighten the screws used in the installation of automotive parts. A displacement sensor is installed on the sensor support plate to detect the tightening depth of the screws. This ensures that the screws are tightened in place during installation, thereby ensuring the stability of the installed parts.

[0012] 2. By providing an oil-free bushing in the outer cylinder, the flexibility of the reference inner cylinder in the process of moving up and down in the outer cylinder is improved;

[0013] 3. By setting a mounting ring at the lower end of the reference inner cylinder and installing an adjustment component composed of a connecting piece and a supporting piece on the mounting ring, the device can fix and install screws in mounting holes of different depths through the adjustment function of the adjustment component, thereby ensuring that the screw-in depth can be accurately monitored during the installation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the present invention;

[0015] Figure 2 It is a cross-sectional view at the outer cylinder position;

[0016] Figure 3 Schematic diagram of the adjustment component structure;

[0017] Figure 4 This is a schematic diagram of the installation ring position;

[0018] Figure 5 Schematic diagram of the connector structure;

[0019] Figure 6 Schematic diagram of the support structure.

[0020] In the figure: zero-gravity balance arm 1, electric tightening gun 21, tightening gun positioning plate 212, wiring hole 2121, tightening gun clamping plate 22, protective cover 23, coupling 24, lock nut 25, rolling bearing 26, screwdriver bit 219, support base 27, limit ring 28, return spring 29, outer cylinder 210, sensor clamping plate 213, displacement sensor 215, displacement sensor detection head 2151, reference block 216, oil-free bushing 217, reference inner cylinder 218, screwdriver bit 219, first guide rod 31, second guide rod 32, drive structure 4, mounting ring 5, first mounting hole 51, connecting member 6, connecting plate 61, first screw 62, second screw 63, support member 7, upper support plate 71, second mounting hole 711, connecting rod 72, lower support plate 73, control switch 8. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-6The present invention provides a technical solution: an electric screwing device for assembling automobile parts, comprising a zero-gravity balance arm 1 and a screwing mechanism, wherein the screwing mechanism is composed of an electric tightening gun 21 and a tightening gun clamping plate 22, wherein the electric tightening gun 21 is provided with a control switch 8, and a screwdriver bit 219 is connected to the motor rotor of the electric tightening gun 21 through a coupling 24, the zero-gravity balance arm 1 is movably provided on a first guide rod 31 and a second guide rod 32 on a base 3, the upper end of the first guide rod 31 is provided with a driving structure 4, the zero-gravity balance arm 1 is driven up and down by the driving structure 4, and the front end of the zero-gravity balance arm 1 is fixedly installed. Equipped with a support base plate 27, the support base plate 27 is an L-shaped plate structure, and a protective cover 23 is provided on the outside of the support base plate 27, and a through hole is provided on the horizontal plate portion of the tightening gun clamping plate 22, and a rolling bearing 26 is fixedly installed in the through hole through a locking nut 25, and the screwdriver bit 219 passes through the inner ring of the rolling bearing 26, and a tightening gun positioning plate 212 is fixedly installed on the upper end of the vertical plate of the support base plate 27, and the gun body of the electric tightening gun 21 is clamped in the positioning hole on the tightening gun positioning plate 212, and a wiring hole 2121 is provided on one side of the positioning hole on the tightening gun positioning plate 212. The lower surface of the horizontal plate 7 is fixedly welded with an outer cylinder 210, and a limit ring 28 is integrally formed on the side wall of the inner cavity of the outer cylinder 210. A reference inner cylinder 218 is movably provided in the inner cavity of the outer cylinder 210, and the screwdriver bit 219 is provided through the inner cavity of the reference inner cylinder 218. The upper side of the reference inner cylinder 218 is connected to the lower surface of the horizontal plate of the support base 27 through a return spring 29. The lower end of the reference inner cylinder 218 is integrally formed with a mounting ring 5. The lower end of the mounting ring 5 is fixedly installed with an adjustment component, and the adjustment component is composed of a connecting member 6 and a support member 7. A sensor support plate 214 is provided on the vertical plate of the support base 27. A displacement sensor 215 is fixedly mounted on the sensor support plate 214 via a sensor clamping plate 213. A rectangular groove is provided on the side of the outer cylinder 210 facing the displacement sensor 215, and a reference block 216 is fixedly mounted on the side of the reference inner cylinder 218. A screwing mechanism composed of an electric tightening gun 21 and a tightening gun clamping plate 22 is provided to fix and tighten the screws during installation of automotive parts, and the displacement sensor 215 is installed on the sensor support plate 214 so that the tightening depth of the screws can be detected by the displacement sensor, thereby ensuring that the screws are tightened in place during installation of the parts, thereby ensuring the stability of the installed parts.

[0023] Furthermore, an oil-free bushing 217 is provided in the outer cylinder 210, and the oil-free bushing 217 is fixed by a bushing retaining ring 211 fixedly mounted on the lower surface of the outer cylinder 210 and a limiting ring 28 on the inner side wall of the outer cylinder 210. The reference inner cylinder 218 is movably provided in the inner ring of the oil-free bushing 217. By providing the oil-free bushing 217 in the outer cylinder 210, the flexibility of the reference inner cylinder 218 in the process of moving up and down in the outer cylinder 210 is improved.

[0024] Furthermore, the displacement sensor detection head 2151 at the lower end of the displacement sensor 215 is located directly above the reference block 216 on the side of the reference inner cylinder 218 .

[0025] Furthermore, the mounting ring 5 is an annular plate, and a first mounting hole 51 is opened on the plate body. There are six first mounting holes 51 arranged at equal intervals.

[0026] Furthermore, the connecting member 6 is composed of a connecting plate 61, a first screw 62, and a second screw 63. The setting position of the first screw 62 corresponds to the position of the first mounting hole 51. The connecting member 6 is set by the first screw 62 passing through the first mounting hole 51 and is positioned by the first fixing nut.

[0027] Furthermore, the support member 7 is composed of an upper support plate 71, a connecting rod 72 and a lower support plate 73. The upper support plate 71 and the lower support plate 73 are both annular plates, and a second mounting hole 711 is provided on the upper support plate 71. The setting position of the second mounting hole 711 corresponds to the position of the second screw 63 on the connecting member 6, and the upper support plate 71 is positioned and fixed on the second screw 63 by a second fixing nut and a third fixing nut. By providing a mounting ring 5 at the lower end of the reference inner cylinder 218 and installing an adjustment assembly composed of a connecting member 6 and a support member 7 on the mounting ring, the device can realize the fixed installation of screws in mounting holes of different depths through the adjustment function of the adjustment assembly, thereby ensuring that the screw-in depth of the screw can be accurately monitored during its installation process.

[0028] Working Principle: In actual use, the staff loosens the second and third fixing nuts on the second screw rod 63 according to the depth of the mounting hole for the screw to be assembled, and then adjusts the position of the upper support plate 71. When the upper support plate 71 is adjusted to the appropriate position, the staff tightens the second and third fixing nuts to complete the positioning and fixation of the support member 7. The staff then holds the electric tightening gun body, stretches the weightless balance arm to the appropriate position, and presses down. When the screwdriver bit contacts or is about to contact the screw, the start button is pressed. The electric tightening gun drives the screwdriver bit to tighten the screw. Continuous downward pressure is required during the tightening process. The bottom surface of the reference inner cylinder contacts the reference end surface of the hole. The reference inner cylinder drives the reference block to press the displacement sensor detection head. The displacement sensor feeds back the displacement value to the control system. When the displacement value reaches the system set value, the control system sends a control signal to the controller of the electric tightening gun, the electric tightening gun stops working, and the control system issues a qualified mark. The electric tightening gun has torque overload protection during the screwing process, which controls the screwing torque to prevent excessive torque from causing screw thread slippage and thus producing defective products.

[0029] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An electric screwing device for assembling automobile parts, comprising a weightless balance arm (1) and a screwing mechanism, wherein the screwing mechanism is composed of an electric screwing gun (21) and a screwing gun clamping plate (22), wherein the electric screwing gun (21) is provided with a control switch (8), and a screwdriver bit (219) is connected to the motor rotor of the electric screwing gun (21) via a coupling (24), and wherein: The weightless balance arm (1) is movably arranged on a first guide rod (31) and a second guide rod (32) on a base (3); a driving structure (4) is provided at the upper end of the first guide rod (31); the weightless balance arm (1) is driven up and down by the driving structure (4); a supporting base plate (27) is fixedly installed at the front end of the weightless balance arm (1); the supporting base plate (27) is an L-shaped plate structure; a protective cover (23) is provided on the outer side of the supporting base plate (27); and a tightening gun clamping plate (22) is provided. The horizontal plate portion is provided with a through hole, and a rolling bearing (26) is fixedly installed in the through hole through a locking nut (25), and the screwdriver bit (219) passes through the inner ring of the rolling bearing (26), and a tightening gun positioning plate (212) is fixedly installed on the upper end of the vertical plate body of the support base plate (27), and the gun body of the electric tightening gun (21) is clamped in the positioning hole on the tightening gun positioning plate (212), and a wiring hole (2121) is provided on one side of the positioning hole on the tightening gun positioning plate (212), and the support base plate (2 7) An outer cylinder (210) is fixedly welded to the lower surface of the horizontal plate body, a limiting ring (28) is integrally formed on the side wall of the inner cavity of the outer cylinder (210), and a reference inner cylinder (218) is movably provided in the inner cavity of the outer cylinder (210), and the screwdriver bit (219) is provided through the inner cavity of the reference inner cylinder (218), the upper side surface of the reference inner cylinder (218) is connected to the lower surface of the horizontal plate body of the supporting bottom plate (27) through a return spring (29), and a mounting ring (5) is integrally formed on the lower end of the reference inner cylinder (218). An adjustment assembly is fixedly mounted on the lower end of the mounting ring (5), and the adjustment assembly is composed of a connecting member (6) and a supporting member (7). A sensor support plate (214) is provided on the vertical plate body of the supporting base plate (27). A displacement sensor (215) is fixedly mounted on the sensor support plate (214) via a sensor clamping plate (213). A rectangular groove is provided on a side of the outer cylinder (210) facing the displacement sensor (215), and a reference block (216) is fixedly mounted on the side of the reference inner cylinder (218). An oil-free bushing (217) is provided in the outer cylinder (210), and the oil-free bushing (217) is fixed by a bushing retaining ring (211) fixedly mounted on the lower surface of the outer cylinder (210) and a limiting ring (28) on the inner wall of the outer cylinder (210), and the reference inner cylinder (218) is movably arranged in the inner ring of the oil-free bushing (217); The displacement sensor detection head (2151) at the lower end of the displacement sensor (215) is located directly above the reference block (216) on the side of the reference inner cylinder (218).

2. The electric screwing device for assembling automobile parts according to claim 1, characterized in that: The mounting ring (5) is an annular plate, and a first mounting hole (51) is provided on the plate body thereof. Six first mounting holes (51) are arranged at equal intervals.

3. The electric screwing device for assembling automobile parts according to claim 1, characterized in that: The connecting member (6) is composed of a connecting plate (61), a first screw rod (62), and a second screw rod (63). The setting position of the first screw rod (62) corresponds to the position of the first mounting hole (51). The connecting member (6) is set by the first screw rod (62) passing through the first mounting hole (51) and is positioned by a first fixing nut.

4. The electric screwing device for assembling automobile parts according to claim 1, characterized in that: The support member (7) is composed of an upper support plate (71), a connecting rod (72) and a lower support plate (73), wherein the upper support plate (71) and the lower support plate (73) are both annular plates, and a second mounting hole (711) is provided on the upper support plate (71), the second mounting hole (711) is arranged at a position corresponding to the position of the second screw (63) on the connecting member (6), and the upper support plate (71) is positioned and fixed on the second screw (63) by a second fixing nut and a third fixing nut.

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