An electric screwing device with depth control

Abstract

The present invention discloses an electric screwing device with depth control, comprising a zero-gravity balance arm and a screwing mechanism installed on the zero-gravity balance arm, wherein the screwing mechanism is composed of a tightening gun clamping plate and an electric screwing gun assembly, the tightening gun clamping plate is connected to the zero-gravity balance arm through a supporting base plate, and the tightening gun clamping plate is arranged on the upper side of the supporting base plate, and the supporting base plate is an L-shaped plate structure, and two tightening gun clamping plates are symmetrically arranged, and the electric screwing gun is fixedly installed in the installation groove between the two tightening gun clamping plates, and the outer sides of the two tightening gun clamping plates are covered with a protective cover; by fixing the electric screwing gun on the tightening gun clamping plate, and fixing the tightening gun clamping plate on the zero-gravity balance arm through the supporting base plate, the position of the electric screwing gun can be flexibly adjusted through the zero-gravity balance arm, thereby improving its flexibility in actual use.

Description

Technical Field

[0001] The present invention relates to the technical field related to auxiliary tools for parts assembly, in particular to an electric screwing device with depth control. Background Art

[0002] The assembly process, especially for automotive control valves, often involves screwing components such as filter screens. For example, filter screens can be assembled by press-fitting or screwing, with screwing being more complex than press-fitting. Unlike tightening conventional fasteners, filter screens require full penetration into the hole in the part into which the filter screen is to be inserted, often to a considerable depth. Furthermore, the filter screwing process requires not only monitoring the torque but also controlling the depth of insertion. The traditional method of determining depth based on the number of turns is complex and inaccurate. It is difficult to obtain an accurate baseline during measurement, resulting in significant instability in the measured data. Summary of the Invention

[0003] The object of the present invention is to provide an electric screwing device with depth control to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an electric screwing device with depth control, comprising a weightless balance arm and a screwing mechanism installed on the weightless balance arm, wherein the screwing mechanism is composed of a tightening gun clamping plate and an electric screwing gun, the tightening gun clamping plate is connected to the weightless balance arm through a support base plate, and the tightening gun clamping plate is arranged on the upper side of the support base plate, and the support base plate is an L-shaped plate structure, the tightening gun clamping plates are symmetrically arranged, the electric screwing gun is fixedly installed in the mounting groove between the two tightening gun clamping plates, and the outer sides of the two tightening gun clamping plates are covered with a protective cover, and the tightening gun support plate is installed on the upper end of the vertical plate of the support base plate, and the gun body of the electric screwing gun is arranged in the mounting hole of the tightening gun support plate, and the tightening gun A wiring hole is provided on the plate body of the support plate, a start button is provided on the gun body of the electric tightening gun, a coupling is fixedly installed at the end of the motor shaft of the electric tightening gun, a screwdriver is fixedly installed on the coupling, a through hole is provided on the plate body of the support base plate, and the shaft body of the screwdriver head passes through the through hole on the support base plate, an outer cylinder is fixedly welded to the lower surface of the support base plate, the outer cylinder is a circular tube structure, and a bushing retaining ring is fixedly installed on the lower surface of the outer cylinder, an oil-free bushing is fixedly provided on the inner side wall of the outer cylinder, a reference inner cylinder is movably installed in the inner ring of the oil-free bushing, and the screwdriver head is arranged to pass through the inner ring of the reference inner cylinder, a rectangular notch is provided on one side of the outer cylinder, and a mounting groove is provided on the upper side surface of the reference inner cylinder, and a reference block is fixedly installed in its notch by a group of positioning bolts.

[0005] Preferably, a rolling bearing is fixedly installed in the through hole on the supporting base plate through a locking nut, and two rolling bearings are provided in total, and the upper rod body of the screwdriver bit is fixedly installed in the inner ring of the rolling bearing.

[0006] Preferably, the inner diameter of the bushing retaining ring is smaller than the inner diameter of the outer cylinder, and the inner diameter of the oil-free bushing is equal to the inner diameter of the bushing retaining ring, and a limiting ring is integrally formed on the inner wall of the outer cylinder, the inner diameter of the limiting ring is smaller than the inner diameter of the oil-free bushing, and the oil-free bushing is fixed between the bushing retaining ring and the limiting ring for fixation.

[0007] Preferably, the upper surface of the reference block is flush with the upper surface of the reference inner cylinder, and support springs are connected between the upper surface of the reference block, the upper surface of the reference inner cylinder and the lower surface of the support base plate, and a guide rod is provided in the inner ring of the support spring.

[0008] Preferably, the reference block is arranged in a rectangular notch on the side wall of the outer cylinder, and the width of the reference block is smaller than the width of the rectangular notch.

[0009] Preferably, the guide rod is composed of a first telescopic tube, a second telescopic tube, a lower connecting plate and an upper connecting plate, and the second telescopic tube is movably arranged in the inner cavity of the first telescopic tube, and the lower connecting plate is connected to the lower end, and the upper connecting plate is connected to the upper end of the second telescopic tube, and the support spring is sleeved on the first telescopic tube and the second telescopic tube, and the upper and lower ends of the support spring are respectively connected to the upper connecting plate and the lower connecting plate.

[0010] Preferably, a sensor support plate is provided on the vertical plate body of the support base plate, and the outer side surface of the sensor support plate is fixedly clamped with a displacement sensor by a sensor clamping plate. The lower end of the displacement sensor is a displacement sensor detection head, and the displacement sensor detection head is arranged to be located directly above the reference block.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. By fixing the electric tightening gun on the tightening gun clamping plate, and fixing the tightening gun clamping plate on the zero-gravity balance arm through the support base, the position of the electric tightening gun can be flexibly adjusted through the zero-gravity balance arm, thereby improving its flexibility in actual use;

[0013] 2. A sensor support plate is provided on the vertical plate supporting the bottom plate, and a displacement sensor is fixedly mounted on the sensor support plate. The displacement sensor is used to detect the screwing depth of the filter during the assembly process, thereby ensuring that the filter is screwed in place and thus ensuring its installation stability;

[0014] 3. The support spring is sleeved on a guide rod composed of the first telescopic tube, the second telescopic tube, the lower connecting plate and the upper connecting plate, thereby ensuring the stability of the return movement of the support spring through the guide rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a cross-sectional view of the present invention;

[0017] Figure 3 This is a half-section view of the guide rod.

[0018] In the figure: balancing arm 1, electric tightening gun 21, outer cylinder 210, bushing retaining ring 211, start button 2111, tightening gun support plate 212, sensor clamping plate 213, sensor support plate 214, displacement sensor 215, displacement sensor detection head 2151, reference block 216, oil-free bushing 217, reference inner cylinder 218, screwdriver bit 219, wiring hole 2121, tightening gun clamping plate 22, protective cover 23, coupling 24, lock nut 25, rolling bearing 26, support base plate 27, support spring 29, guide rod 31, first telescopic tube 311, second telescopic tube 312, lower connecting plate 313, upper connecting plate 314. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figure 1-3The present invention provides a technical solution: an electric screwing device with depth control, comprising a weightless balance arm 1 and a screwing mechanism installed on the weightless balance arm 1, wherein the screwing mechanism is composed of a tightening gun clamping plate 22 and an electric screwing gun 21. The tightening gun clamping plate 22 is connected to the weightless balance arm 1 through a support base 27, and the tightening gun clamping plate 22 is arranged on the upper side of the support base 27, and the support base 27 is an L-shaped plate structure. The tightening gun clamping plate 22 is symmetrically arranged with two pieces. The electric screwing gun 21 is fixedly installed in the installation groove between the two tightening gun clamping plates 22, and the outer sides of the two tightening gun clamping plates 22 are covered with a protective cover 23, and the upper end of the vertical plate of the supporting base plate 27 is installed with a tightening gun support plate 212, and the gun body of the electric tightening gun 21 is set in the installation hole of the tightening gun support plate 212, and the plate body of the tightening gun support plate 212 is provided with a wiring hole 2121, the gun body of the electric tightening gun 21 is provided with a start button 2111, and the end of the motor shaft of the electric tightening gun 21 is fixedly installed with a coupling 2 4. A screwdriver bit 219 is fixedly mounted on the coupling 24. A through hole is provided on the plate body of the support base 27, and the shaft of the screwdriver bit 219 passes through the through hole on the support base 27. An outer cylinder 210 is fixedly welded to the lower surface of the support base 27. The outer cylinder 210 is a circular tube structure, and a bushing retaining ring 211 is fixedly mounted on the lower surface of the outer cylinder 210. An oil-free bushing 217 is fixedly provided on the inner side wall of the outer cylinder 210. A reference inner cylinder 218 is movably mounted in the inner ring of the oil-free bushing 217, and the screwdriver bit 219 is fixedly mounted from the reference inner cylinder 2 18 is passed through the inner circle, a rectangular notch is opened on one side of the outer cylinder 210, and a mounting groove is opened on the upper side of the reference inner cylinder 218, and a reference block 216 is fixedly installed in its notch by a set of positioning bolts. By fixing the electric tightening gun 21 on the tightening gun clamping plate 22, and fixing the tightening gun clamping plate 22 on the weightless balance arm 1 through the support base 27, the position of the electric tightening gun 21 can be flexibly adjusted through the weightless balance arm 1, thereby improving its flexibility in actual use.

[0021] Furthermore, a rolling bearing 26 is fixedly installed in the through hole on the support base plate 27 through a locking nut 25. There are two rolling bearings 26 in total, and the upper rod body of the screwdriver bit 219 is fixedly installed in the inner ring of the rolling bearing 26.

[0022] Furthermore, the inner diameter of the bushing retaining ring 211 is smaller than the inner diameter of the outer cylinder 210, and the inner diameter of the oil-free bushing 217 is equal to the inner diameter of the bushing retaining ring 211, and a limiting ring is integrally formed on the inner wall of the outer cylinder 210, the inner diameter of the limiting ring is smaller than the inner diameter of the oil-free bushing 217, and the oil-free bushing 217 is fixed between the bushing retaining ring 211 and the limiting ring for fixation.

[0023] Furthermore, the upper surface of the reference block 216 is flush with the upper surface of the reference inner cylinder 218, and support springs 29 are connected between the upper surface of the reference block 216, the upper surface of the reference inner cylinder 218 and the lower surface of the support base plate 27, and a guide rod 31 is provided in the inner ring of the support spring 29.

[0024] Furthermore, the reference block 216 is disposed in a rectangular notch on the side wall of the outer cylinder 210 , and the width of the reference block 216 is smaller than the width of the rectangular notch.

[0025] Furthermore, the guide rod 31 is composed of a first telescopic tube 311, a second telescopic tube 312, a lower connecting plate 313 and an upper connecting plate 314, and the second telescopic tube 312 is movably arranged in the inner cavity of the first telescopic tube 311, and the lower connecting plate 313 is connected to the lower end, and the upper connecting plate 314 is connected to the upper end of the second telescopic tube 312, and the support spring 29 is sleeved on the first telescopic tube 311 and the second telescopic tube 312, and the upper and lower ends of the support spring 29 are respectively connected to the upper connecting plate 314 and the lower connecting plate 313. By sleeved on the guide rod 31 composed of the first telescopic tube 311, the second telescopic tube 312, the lower connecting plate 313 and the upper connecting plate 314, the stability of the reset movement of the support spring 29 is ensured by the guide rod 31.

[0026] Furthermore, a sensor support plate 214 is provided on the vertical plate body of the support base plate 27. The outer side surface of the sensor support plate 214 is fixedly clamped with a displacement sensor 215 by a sensor clamping plate 213. The lower end of the displacement sensor 215 is a displacement sensor detection head 2151, and the displacement sensor detection head 2151 is arranged directly above the reference block 216. By providing the sensor support plate 214 on the vertical plate body of the support base plate 27 and fixing the displacement sensor 215 on the sensor support plate 214, the screwing depth of the filter screen during the assembly process is detected by the displacement sensor 215, thereby ensuring that the filter screen is screwed into place, thereby ensuring its installation stability.

[0027] Working principle: Taking the screwing of the filter as an example, the specific working process of the present invention to complete the depth control and screw the filter into place is as follows: manually take the filter and place it in the threaded hole to be installed, hold the gun body of the electric tightening gun, stretch the weightless balance arm to the appropriate position and then press down. When the screwdriver bit contacts or is about to contact the filter, press the start button, and the electric tightening gun drives the screwdriver bit to screw the filter. Continuous pressure is required during the screwing 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 setting 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 gives a qualified mark. The electric tightening gun has torque overload protection during the screwing process, which controls the screwing torque to prevent excessive torque during the screwing process, causing damage to the filter and producing unqualified products.

[0028] 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 with depth control, comprising a weightless balance arm (1) and a screwing mechanism mounted on the weightless balance arm (1), wherein the screwing mechanism is composed of a screwing gun clamping plate (22) and an electric screwing gun (21), and is characterized in that: The tightening gun clamping plate (22) is connected to the weightless balance support arm (1) through the support base plate (27), and the tightening gun clamping plate (22) is arranged on the upper side of the support base plate (27), and the support base plate (27) is an L-shaped plate structure. The tightening gun clamping plates (22) are symmetrically arranged in two pieces. The electric tightening gun (21) is fixedly installed in the installation groove between the two tightening gun clamping plates (22), and the outer sides of the two tightening gun clamping plates (22) are covered with a protective cover (23), and the vertical plate of the support base plate (27) is provided with a protective cover (23). The end of the electric tightening gun (21) is installed with a tightening gun support plate (212), and the gun body of the electric tightening gun (21) is arranged in the installation hole of the tightening gun support plate (212), and the plate body of the tightening gun support plate (212) is provided with a wiring hole (2121), the gun body of the electric tightening gun (21) is provided with a start button (2111), the end of the motor shaft of the electric tightening gun (21) is fixedly installed with a coupling (24), and a screwdriver bit (219) is fixedly installed on the coupling (24), and a through hole is provided on the plate body of the support base (27), and the screwdriver bit (219) is fixedly installed on the coupling (24). ) passes through the through hole on the support base plate (27), the lower surface of the support base plate (27) is fixedly welded with an outer cylinder (210), the outer cylinder (210) is a circular tube structure, and the lower surface of the outer cylinder (210) is fixedly installed with a bushing retaining ring (211), the inner side wall of the outer cylinder (210) is fixedly provided with an oil-free bushing (217), the inner ring of the oil-free bushing (217) is movably installed with a reference inner cylinder (218), and the screwdriver bit (219) is provided through the inner ring of the reference inner cylinder (218), and the outer cylinder (2 A rectangular notch is provided on one side of the base plate (10), and a mounting groove is provided on the upper side of the reference inner cylinder (218), and a reference block (216) is fixedly installed in the notch by a group of positioning bolts, and a rolling bearing (26) is fixedly installed in the through hole on the support base plate (27) by a locking nut (25), the upper surface of the reference block (216) is flush with the upper surface of the reference inner cylinder (218), and a support spring (29) is connected between the upper surface of the reference block (216), the upper surface of the reference inner cylinder (218) and the lower surface of the support base plate (27).

2. The electric screwing device with depth control according to claim 1, characterized in that: There are two rolling bearings (26) in total, and the upper rod of the bit (219) is fixedly mounted in the inner ring of the rolling bearing (26).

3. The electric screwing device with depth control according to claim 1, characterized in that: The inner diameter of the bushing retaining ring (211) is smaller than the inner diameter of the outer cylinder (210), and the inner diameter of the oil-free bushing (217) is equal to the inner diameter of the bushing retaining ring (211), and a limiting ring is integrally formed on the inner side wall of the outer cylinder (210), the inner diameter of the limiting ring is smaller than the inner diameter of the oil-free bushing (217), and the oil-free bushing (217) is fixedly clamped between the bushing retaining ring (211) and the limiting ring for fixation.

4. The electric screwing device with depth control according to claim 1, characterized in that: A guide rod (31) is provided in the inner ring of the support spring (29).

5. The electric screwing device with depth control according to claim 4, characterized in that: The reference block (216) is arranged in a rectangular notch on the side wall of the outer cylinder (210), and the width of the reference block (216) is smaller than the width of the rectangular notch.

6. The electric screwing device with depth control according to claim 4, characterized in that: The guide rod (31) is composed of a first telescopic tube (311), a second telescopic tube (312), a lower connecting plate (313) and an upper connecting plate (314), and the second telescopic tube (312) is movably arranged in the inner cavity of the first telescopic tube (311), and the lower connecting plate (313) is connected to the lower end, and the upper connecting plate (314) is connected to the upper end of the second telescopic tube (312), and the support spring (29) is sleeved on the first telescopic tube (311) and the second telescopic tube (312), and the upper and lower ends of the support spring (29) are respectively connected to the upper connecting plate (314) and the lower connecting plate (313).

7. The electric screwing device with depth control according to claim 1, characterized in that: A sensor support plate (214) is provided on the vertical plate body of the support base plate (27); the outer side surface of the sensor support plate (214) is fixedly clamped with a displacement sensor (215) via a sensor clamping plate (213); the lower end of the displacement sensor (215) is a displacement sensor detection head (2151), and the displacement sensor detection head (2151) is provided directly above the reference block (216).

Images