Universal electric screwdriver fixing module

Abstract

The utility model discloses a universal type electric screwdriver fixing module which comprises a base plate, a guide rail plate is fixedly arranged on the base plate, a vertical guide rail is arranged on the guide rail plate, a first sliding block and a second sliding block are arranged on the guide rail in a sliding mode, a guide installation plate is fixedly arranged on the second sliding block, a guide pipe is fixedly arranged on the guide installation plate, and the guide pipe is fixedly arranged on the guide installation plate. A spherical cavity, a lower pipeline communicated with the lower end of the spherical cavity and an upper pipeline communicated with the upper end of the spherical cavity are arranged in the guide pipe, a bit part is arranged in the lower pipeline, and a bowl-shaped part fixedly arranged at the upper end of the bit part is arranged in the spherical cavity. According to the universal electric screwdriver fixing module, through the friction fit design of the spherical cavity, the bowl-shaped piece and the spherical piece, the multi-angle inclination adjusting capacity of the screwdriver head piece is achieved, and therefore the problem that an existing automatic screw locking machine can only vertically tighten a screw is solved, the universal electric screwdriver fixing module can adapt to threaded holes of different angles, and the working efficiency is improved. And the working quality, the universality and the automatic adaptability of the equipment are obviously improved.

Description

Technical Field

[0001] This utility model relates to the technical field of electric screwdriver fixing modules, specifically a general-purpose electric screwdriver fixing module. Background Technology

[0002] As described in the published patent CN220217439U, "An Adjustment Mechanism for a Y-axis Base of an Automatic Screw Fastening Machine," an automatic screw fastening machine uses various electric and pneumatic components to automatically feed, tighten, and inspect screws. This simplifies the screw fastening process, reducing the number of manual workers and minimizing human error. It is a typical non-standard automated device. Automatic screw fastening machines are mainly divided into: handheld screw fastening machines, multi-axis automatic screw fastening machines, and coordinate-type automatic screw fastening machines. Existing automatic screw fastening machines can only tighten screws vertically, failing to tighten from threaded holes at different angles, thus reducing the machine's working quality.

[0003] As described in the published patent CN218284437U, "An Adjustable Multi-Axis Automatic Screw Fastening Machine," an automatic screw fastening machine uses various electric and pneumatic components to automatically feed, tighten, and inspect screws. This simplifies the screw fastening process, reducing manual labor and minimizing human error. It is a typical non-standard automated device. Automatic screw fastening machines are mainly classified as: handheld screw fastening machines, multi-axis automatic screw fastening machines, and coordinate-type automatic screw fastening machines.

[0004] Currently, the most common type of screw fastening machine is the multi-axis automatic screw fastening machine. Existing multi-axis automatic screw fastening machines usually tighten screws vertically, and can only tighten screws on products with flat surfaces. The axial angle cannot be adjusted, making it difficult to screw screws into products with inclined threaded holes.

[0005] In summary, some existing screw fastening modules have functional limitations when fastening screws into screw holes at different angles. Utility Model Content

[0006] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution for a universal electric screwdriver fixing module that can solve the above problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A universal electric screwdriver fixing module includes a base plate, a guide rail plate fixed on the base plate, a vertical guide rail on the guide rail plate, and a first slider and a second slider slidably mounted on the guide rail.

[0009] A servo motor is fixedly mounted on the first slider, and a transmission rod is fixedly mounted on the working shaft of the servo motor. A lifting power component is fixedly mounted on the guide rail plate, and the working shaft of the lifting power component is fixedly connected to the first slider to control the lifting of the first slider.

[0010] The second slider is fixedly provided with a guide mounting plate, and a guide tube is fixedly provided on the guide mounting plate. The guide tube is provided with a spherical cavity, a lower pipe communicating with the lower end of the spherical cavity, and an upper pipe communicating with the upper end of the spherical cavity. A bit is provided in the lower pipe, and a bowl-shaped part is fixedly provided on the upper end of the bit in the spherical cavity. The bowl-shaped part rotates and engages in the spherical cavity. A miniature electric push rod assembly is provided on the inner wall of the lower pipe to adjust the tilt angle of the bit.

[0011] The transmission rod extends from the upper pipe into the spherical cavity. The spherical cavity is provided with a spherical component fixed to the lower end of the transmission rod. The spherical component abuts against the bowl-shaped component. The spherical component and the bowl-shaped component are respectively provided with a first abutting surface and a second abutting surface that rub against each other.

[0012] As a further embodiment of this utility model: the spherical component includes an alloy structural steel ball, the first abutting surface includes a laser-engraved micro-pit matrix disposed on the alloy structural steel ball, the bowl-shaped component includes an alloy structural steel bowl, and the second abutting surface includes a thermally sprayed tungsten carbide layer disposed on the inner wall of the alloy structural steel bowl.

[0013] As a further embodiment of this utility model: the outer wall of the bowl-shaped component is provided with a DLC coating, and the inner wall of the spherical cavity is provided with a polytetrafluoroethylene layer.

[0014] As a further embodiment of this utility model: the inner wall of the lower pipe is provided with a left mounting hole and a right mounting hole that are symmetrically connected to the left and right sides, and the miniature electric push rod assembly includes a left miniature electric push rod and a right miniature electric push rod that are respectively installed in the left mounting hole and the right mounting hole.

[0015] As a further embodiment of this utility model: a rubber limiting member is fixedly provided inside the upper pipe, and the lower end of the rubber limiting member is provided with an arc-shaped rounded corner that abuts against the spherical member.

[0016] As a further embodiment of this utility model: the lifting power component includes a lifting cylinder, a mounting rod is fixedly mounted on the working shaft of the lifting cylinder, a first slider is movably sleeved on the mounting rod, a limiting block is provided at the lower end of the mounting rod to limit the first slider, a spring is sleeved on the mounting rod, the upper end of the spring is in limiting contact with the upper end of the mounting rod, and the lower end of the spring is in contact with the first slider.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This utility model of a universal electric screwdriver fixing module achieves multi-angle tilt adjustment capability of the screwdriver bit through the frictional fit design of the spherical chamber, bowl-shaped part and spherical part. This solves the limitation of existing automatic screw fastening machines that can only tighten screws vertically, and enables it to adapt to threaded holes of different angles, significantly improving the working quality, versatility and automation adaptability of the equipment. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural view of the present invention;

[0020] Figure 2 This is another three-dimensional view of the structure of this utility model;

[0021] Figure 3 This is a front view of the present invention;

[0022] Figure 4 yes Figure 3 A cross-sectional view along the AA direction;

[0023] Figure 5 yes Figure 4 A partial view at point B in the middle;

[0024] The reference numerals and names in the figure are as follows:

[0025] Substrate-101, guide rail plate-102, guide rail-103, first slider-104, second slider-105, servo motor component-106, transmission rod-108, lifting power component-109, guide mounting plate-110, guide tube-111, spherical chamber-112, lower pipe-113, upper pipe-114, bit component-115, bowl-shaped component-116, miniature electric push rod component assembly-117, spherical component-118, first abutment surface-119, second Contact surface - 120, alloy structure steel ball - 121, laser-engraved micro-pit matrix - 122, alloy structure steel bowl - 123, thermally sprayed tungsten carbide layer - 124, DLC coating - 125, polytetrafluoroethylene layer - 126, left mounting hole - 127, right mounting hole - 128, left miniature electric actuator - 129, right miniature electric actuator - 130, rubber limiter - 131, rounded corner - 132, lifting cylinder - 133, mounting rod - 134, spring - 137. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 A general-purpose electric screwdriver fixing module includes a base plate 101, a guide rail plate 102 fixed on the base plate 101, a vertical guide rail 103 on the guide rail plate 102, and a first slider 104 and a second slider 105 slidably disposed on the guide rail 103.

[0028] A servo motor 106 is fixed on the first slider 104, and a transmission rod 108 is fixed on the working shaft of the servo motor 106. A lifting power component 109 is fixed on the guide rail plate 102. The working shaft of the lifting power component 109 is fixedly connected to the first slider 104 to control the lifting of the first slider 104.

[0029] The second slider 105 is fixedly provided with a guide mounting plate 110, and a guide tube 111 is fixedly provided on the guide mounting plate 110. The guide tube 111 is provided with a spherical cavity 112, a lower pipe 113 connected to the lower end of the spherical cavity 112, and an upper pipe 114 connected to the upper end of the spherical cavity 112. A bit 115 is provided in the lower pipe 113, and a bowl-shaped part 116 fixed to the upper end of the bit 115 is provided in the spherical cavity 112. The bowl-shaped part 116 rotates and engages in the spherical cavity 112. A miniature electric push rod assembly 117 is provided on the inner wall of the lower pipe 113 to adjust the tilt angle of the bit 115.

[0030] The transmission rod 108 extends from the upper pipe 114 into the spherical chamber 112. The spherical chamber 112 is provided with a spherical part 118 fixed to the lower end of the transmission rod 108. The spherical part 118 abuts and fits in the bowl-shaped part 116. The spherical part 118 and the bowl-shaped part 116 are respectively provided with a first abutting surface 119 and a second abutting surface 120 that rub against each other.

[0031] like Figure 1 and 5 As shown, through the unique spherical chamber 112, the bowl-shaped part 116 and the spherical part 118 matching structure (specifically manifested as the frictional fit between the first contact surface 119 and the second contact surface 120), and by using the lifting power component 109 to control the lifting of the first slider 104 (with servo motor and transmission rod 108), and the setting of the guide mounting plate 110 and guide tube 111 on the second slider 105, stable power transmission and precise angle adjustment of the bit part 115 in a non-vertical state are achieved;

[0032] The abutting fit of the spherical part 118 within the bowl-shaped part 116 allows for a large degree of freedom in relative angular change between the transmission rod 108 and the bit part 115 while maintaining effective torque transmission. The servo motor drives the transmission rod 108 and the spherical part 118 to rotate, and the spherical part 118 drives the bowl-shaped part 116 through the friction surface, thereby causing the bit part 115 to rotate and perform the tightening action. The lifting power component 109 controls the lifting of the entire drive unit (servo motor, transmission rod 108, spherical part 118).

[0033] It breaks through the limitation of traditional automatic screw fastening machine electric screwdriver modules that can only fasten screws in the vertical direction, enabling it to flexibly adapt to threaded holes of various tilt angles on products, significantly improving the equipment's compatibility (versatility) with different workpieces, and effectively solving the problem of limited functionality of some screw fastening modules when fastening screws to screw holes of different angles.

[0034] The bowl-shaped component 116 is rotatable within the spherical chamber 112, and the spherical component 118 abuts within the bowl-shaped component 116, forming a highly efficient "universal joint" structure. The friction transmission mechanism is as follows: the frictional engagement between the first contact surface 119 (bowl-shaped component 116) and the second contact surface 120 (spherical component 118) is the core of torque transmission. The rotational force of the servo motor is transmitted through the transmission rod 108 → spherical component 118 → friction surface → bowl-shaped component 116 → bit component 115. The above structure allows the bit component 115 to tilt at multiple angles relative to the vertical axis of the transmission rod 108 (similar to the movement of a ball joint), and the rotational torque can still be effectively transmitted in this tilted state.

[0035] The lifting power component 109 drives the first slider 104 to rise and fall, which in turn drives the servo motor, transmission rod 108, and spherical component 118 to rise and fall as a whole. When the bit needs to be tilted and locked, the tilt angle of the bit component 115 is first adjusted by the micro electric push rod component assembly 117 (with self-locking function). The extension and retraction of the micro electric push rod component are controlled by the control system to keep the micro electric push rod in a predetermined position, thereby adjusting the tilt angle of the bit component 115 to the predetermined position. The lifting action can adjust the contact position and pressure of the spherical component 118 in the bowl-shaped component 116. When the micro electric push rod is adjusting the angle of the bit component 115, the lifting power component 109 drives the first slider 104 to rise, thereby separating the first contact surface 119 and the second contact surface 120, which facilitates the angle adjustment of the bit component 115. After the adjustment is in place, the lifting power component 109 drives the first slider 104 to fall, so that the first contact surface 119 and the second contact surface 120 are stably engaged and cooperated, ensuring the stability and reliability of the friction transmission in the tilted state of the bit component 115.

[0036] This utility model universal electric screwdriver fixing module achieves multi-angle tilt adjustment capability of the screwdriver bit 115 through the friction fit design of the spherical chamber 112, the bowl-shaped part 116 and the spherical part 118. This solves the limitation of existing automatic screw fastening machines that can only tighten screws vertically, and enables it to adapt to threaded holes of different angles. It significantly improves the working quality, versatility and automation adaptability of the equipment, and reduces manual intervention and operation errors.

[0037] In this embodiment of the present invention, the spherical component 118 includes an alloy structural steel ball, the first abutting surface 119 includes a laser-engraved micro-pit matrix 122 disposed on the alloy structural steel ball, the bowl-shaped component 116 includes an alloy structural steel bowl 123, and the second abutting surface 120 includes a thermally sprayed tungsten carbide layer 124 disposed on the inner wall of the alloy structural steel bowl.

[0038] like Figure 5 As shown, by using alloy structural steel balls 121 and alloy structural steel bowls 123 as the core friction pair substrates, and combining the synergistic surface treatment process of laser-engraved micro-pit matrix 122 and thermally sprayed tungsten carbide layer 124, the wear resistance and engagement capability of the spherical part 118 and the bowl-shaped part 116 at the first contact surface 119 and the second contact surface 120 are significantly improved. The tungsten carbide layer gives the contact surface high hardness and excellent anti-abrasive wear performance; the alloy structural steel substrate provides overall strong support. The three together ensure that the friction transmission mechanism can stably transmit high torque and avoid the failure of fit due to surface wear during long-term multi-angle tilting locking operations, thereby greatly extending the service life of the module and maintaining the long-term accuracy and reliability of the locking torque.

[0039] In this embodiment of the present invention, the outer wall of the bowl-shaped component 116 is provided with a DLC coating 125, and the inner wall of the spherical cavity 112 is provided with a polytetrafluoroethylene layer 126.

[0040] like Figure 5 As shown, by applying a DLC coating 125 (diamond-like carbon coating) to the outer wall of the bowl-shaped part 116 and a polytetrafluoroethylene (PTFE) layer 126 to the inner wall of the spherical chamber 112, the dynamic fit performance between the bowl-shaped part 116 and the spherical chamber 112 is significantly optimized. The DLC coating 125 has ultra-high hardness, extremely low coefficient of friction, and excellent self-lubricating properties, which effectively reduces the wear on the outer wall of the bowl-shaped part 116 during rotation and swing and reduces the resistance to movement. The PTFE layer 126 provides excellent chemical stability, extremely low adhesion coefficient, and long-lasting dry lubrication capability, which not only further reduces the frictional loss between the bowl-shaped part 116 and the chamber wall, but also effectively avoids micro-vibration wear or seizing caused by metal contact.

[0041] In this embodiment of the present invention, the inner wall of the lower pipe 113 is provided with a left mounting hole 127 and a right mounting hole 128 that are symmetrically connected to the left and right sides. The micro electric push rod assembly includes a left micro electric push rod 129 and a right micro electric push rod 130 that are respectively installed in the left mounting hole 127 and the right mounting hole 128.

[0042] like Figure 5 As shown, by symmetrically opening left and right mounting holes 128 on the inner wall of the lower pipe 113 and embedding the left micro electric push rod 129 and the right micro electric push rod 130 respectively, a bidirectional cooperative force application mechanism is constructed. This design enables the bit 115 to obtain precise and stable guidance when working in a non-vertical state, which can prevent swinging and deviation when tilted and locked, and significantly improve the stability of the bit 115 in complex angle operations.

[0043] In this embodiment of the present invention, a rubber limiting member 131 is fixedly provided inside the upper pipe 114, and the lower end of the rubber limiting member 131 is provided with an arc-shaped rounded corner 132 that abuts against the spherical member 118.

[0044] By using the adaptive fit between the arc-shaped fillet 132 and the spherical part 118, excessive axial displacement of the spherical part 118 is limited while avoiding damage caused by rigid collisions.

[0045] In this embodiment of the utility model, the lifting power component 109 includes a lifting cylinder 133. A mounting rod 134 is fixedly mounted on the working shaft of the lifting cylinder 133. A first slider 104 is movably sleeved on the mounting rod 134. A limiting block that cooperates with the first slider 104 is provided at the lower end of the mounting rod 134. A spring component 137 is sleeved on the mounting rod 134. The upper end of the spring component 137 is in limiting contact with the upper end of the mounting rod 134, and the lower end of the spring component 137 is in contact with the first slider 104.

[0046] The spring 137 utilizes its preload and elastic deformation capabilities to effectively buffer rigid impacts and high-frequency vibrations during cylinder start-up, shutdown, and lifting, significantly improving the smoothness of servo motor 106 operation. Furthermore, in a non-vertical locking state, the spring 137 dynamically compensates for axial pressure fluctuations caused by gravitational forces or angular changes, ensuring that the friction contact surfaces (first contact surface 119 and second contact surface 120) between the spherical part 118 and the cup-shaped part 116 at the end of the transmission rod 108 always maintain a stable and appropriate clamping force. This protects the friction pair from abnormal load damage, maintains the reliability of torque transmission, and extends the service life of the cylinder and servo motor.

[0047] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A universal electric screwdriver fixing module, characterized in that, Includes a base plate (101), on which a guide rail plate (102) is fixedly mounted, and a vertical guide rail (103) is provided on the guide rail plate (102). A first slider (104) and a second slider (105) are slidably mounted on the guide rail (103). A servo motor component (106) is fixedly mounted on the first slider (104), and a transmission rod (108) is fixedly mounted on the working shaft of the servo motor component (106). A lifting power component (109) is fixedly mounted on the guide rail plate (102). The working shaft of the lifting power component (109) is fixedly connected to the first slider (104) to control the lifting of the first slider (104). The second slider (105) is fixedly provided with a guide mounting plate (110), and the guide mounting plate (110) is fixedly provided with a guide tube (111). The guide tube (111) is provided with a spherical cavity (112), a lower pipe (113) connected to the lower end of the spherical cavity (112), and an upper pipe (114) connected to the upper end of the spherical cavity (112). The lower pipe (113) is provided with a bit (115), and the spherical cavity (112) is provided with a bowl-shaped part (116) fixed to the upper end of the bit (115). The bowl-shaped part (116) rotates and engages in the spherical cavity (112). The inner wall of the lower pipe (113) is provided with a miniature electric push rod assembly (117) to adjust the tilt angle of the bit (115). The transmission rod (108) extends from the upper pipe (114) into the spherical chamber (112). The spherical chamber (112) is provided with a spherical part (118) fixed to the lower end of the transmission rod (108). The spherical part (118) abuts and fits inside the bowl-shaped part (116). The spherical part (118) and the bowl-shaped part (116) are respectively provided with a first abutting surface (119) and a second abutting surface (120) that rub against each other.

2. The universal electric screwdriver fixing module according to claim 1, characterized in that, The spherical component (118) includes an alloy structural steel ball, the first abutting surface (119) includes a laser-engraved micro-pit matrix (122) disposed on the alloy structural steel ball, the bowl-shaped component (116) includes an alloy structural steel bowl (123), and the second abutting surface (120) includes a thermally sprayed tungsten carbide layer (124) disposed on the inner wall of the alloy structural steel bowl.

3. A universal electric screwdriver fixing module according to claim 2, characterized in that, The outer wall of the bowl-shaped component (116) is provided with a DLC coating (125), and the inner wall of the spherical chamber (112) is provided with a polytetrafluoroethylene layer (126).

4. A universal electric screwdriver fixing module according to any one of claims 1-3, characterized in that, The inner wall of the lower pipe (113) is provided with a left mounting hole (127) and a right mounting hole (128) that are symmetrically connected to the left and right. The miniature electric actuator assembly includes a left miniature electric actuator (129) and a right miniature electric actuator (130) that are respectively installed in the left mounting hole (127) and the right mounting hole (128).

5. A universal electric screwdriver fixing module according to claim 4, characterized in that, A rubber limiting member (131) is fixedly installed inside the upper pipe (114), and the lower end of the rubber limiting member (131) is provided with an arc-shaped rounded corner (132) that abuts against the spherical member (118).

6. A universal electric screwdriver fixing module according to claim 5, characterized in that, The lifting power component (109) includes a lifting cylinder (133). A mounting rod (134) is fixed on the working shaft of the lifting cylinder (133). A first slider (104) is movably sleeved on the mounting rod (134). The lower end of the mounting rod (134) is provided with a limiting block that cooperates with the first slider (104). A spring (137) is sleeved on the mounting rod (134). The upper end of the spring (137) is in limiting contact with the upper end of the mounting rod (134), and the lower end of the spring (137) is in contact with the first slider (104).

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