Screw screwing and fixing device for computer accessory machining

Abstract

The invention relates to the technical field of computer accessory machining, and discloses a screw screwing and fixing device for computer accessory machining, which comprises a main shaft shell, an electric screwdriver module is mounted in the main shaft shell, the electric screwdriver module is connected with external driving equipment, and a screw supply cylinder is mounted on the side wall of the main shaft shell; the screw supply cylinder is connected with an external feeding mechanism, a centripetal friction mechanism is installed at the bottom of the main shaft shell and at least comprises four friction shafts, a double-face tooth transmission ring is installed in the centripetal friction mechanism, at least four synchronous transmission assemblies are installed in the centripetal friction mechanism, and the centripetal friction mechanism is driven through a power distribution unit. The friction shaft moves centripetally and rotates to drive the screw to rotate to adjust the posture, so that the defect caused by the fact that the screwdriver rotates firstly is avoided, the time for waiting for rotation and alignment of the screwdriver additionally is not needed, an existing production process is naturally fused, the overall production efficiency is greatly improved, and powerful support is provided for large-scale production of enterprises.

Description

Technical Field

[0001] The invention relates to the technical field of computer accessory processing, in particular to a screw screwing and fixing device used for computer accessory processing. Background Art

[0002] With the continuous development of technology, the variety of computer components has become increasingly rich and diverse. The screw tightening process is crucial in the production and assembly of computers. However, manual screw tightening is not only inefficient but also difficult to ensure precision and consistency. Against this backdrop, automated computer component screw tightening devices have emerged.

[0003] This type of device integrates automatic loading and screwing functions. It can transport screws to the designated position in an orderly manner through an external loading mechanism, and then use the electric screwdriver module to accurately complete the screw tightening operation, thereby greatly improving the efficiency and quality of the screw tightening process in the computer production and assembly process, effectively meeting the needs of large-scale production.

[0004] However, the existing automated screwdriving devices still have obvious defects in practical applications. Although automatic loading and screwdriving functions are achieved, the precise alignment of the screw and the electric screwdriver module during the loading process is always a major problem. Currently, most devices use the method of rotating the electric screwdriver module first, trying to find the alignment state with the screw through the rotation action. This method has many disadvantages:

[0005] First, when the electric screwdriver module rotates, if the screw is not completely aligned with the screwdriver, the rotation of the screwdriver may cause the screw to move unnecessary, causing the screw to tilt on the surface of the computer accessory. Once the screw is tilted, subsequent tightening operations will make it difficult to accurately screw the screw into the screw hole of the computer accessory, seriously affecting the assembly quality of the product.

[0006] Secondly, during the rotation of the screwdriver, the friction between the screw and the screw may cause scratches on the surface of the screw, especially for some computer accessories with high surface accuracy requirements, such as precision circuit boards. Such scratches may cause irreversible damage to the performance and appearance of the accessories, and increase the defective rate of the product.

[0007] Furthermore, when the screwdriver is turning to find the alignment position, if the operation is improper, the screwdriver may come into contact with or even collide with the surface of the computer accessory, thereby damaging the surface of the computer accessory. The surface of computer accessories is often relatively fragile. Once damaged, it may affect its normal function and service life, causing unnecessary cost losses to the company.

[0008] In addition, this method of turning the screwdriver first and then aligning the screws will increase the time of the entire screwing process. In large-scale production, the increased screwing time of each screw will lead to a decrease in overall production efficiency and cannot meet the company's needs for efficient production.

[0009] To this end, the present invention provides a screw tightening and fixing device for processing computer accessories. Summary of the Invention

[0010] The object of the present invention is to provide a screw tightening and fixing device for computer parts processing to solve the problems raised in the above background technology.

[0011] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a screw tightening and fixing device for processing computer accessories, comprising a spindle housing, an electric screwdriver module installed inside the spindle housing, the electric screwdriver module being connected to an external drive device, a screw supply cylinder installed at the side wall of the spindle housing, the screw supply cylinder being connected to an external feeding mechanism, a centripetal friction mechanism installed at the bottom of the spindle housing, the centripetal friction mechanism comprising at least four friction shafts, a double-sided tooth transmission ring installed inside the centripetal friction mechanism, at least four synchronous transmission assemblies installed inside the centripetal friction mechanism, a power distribution unit installed at the side wall of the spindle housing, the power distribution unit driving the centripetal friction mechanism, under the action of the synchronous transmission assembly and the double-sided tooth transmission ring, the friction shaft moves toward one side of the center of the spindle housing, and the friction shaft can rotate while moving centripetally, and the posture of the screw on the computer accessory is adjusted by rotation so that it is aligned with the electric screwdriver module.

[0012] Preferably, the power distribution unit consists of a drive motor and a layered drive unit, the drive motor is installed on the outer wall of the main shaft housing, the layered drive unit is fixedly connected to the output shaft of the drive motor, and the centripetal friction mechanism also includes a fixed base plate and a rotating gear plate, the fixed base plate is fixedly connected to the bottom of the main shaft housing, and the rotating gear plate is rotatably connected to the inside of the fixed base plate.

[0013] Preferably, the layered drive unit is composed of an upper gear and a lower gear, the upper gear is engaged with a double-sided gear transmission ring, the lower gear is engaged with a rotating gear disk, and the double-sided gear transmission ring is rotatably connected to the inside of the fixed base disk.

[0014] Preferably, the surface of the fixed base plate is arranged in a circular shape with linear guide grooves equidistantly extending therethrough, and the surface of the rotating gear plate is arranged in a circular shape with arc guide grooves equidistantly extending therethrough. Each of the linear guide grooves and arc guide grooves is slidably connected to a linkage shaft inside, and the friction shafts are fixedly connected to the top of the linkage shaft.

[0015] Preferably, a through hole is provided in the middle of the fixed base disc and the rotating gear disc.

[0016] Preferably, the synchronous transmission assembly includes at least four planetary gear columns, each of which is rotatably connected to the surface of a rotating gear disk, each of which is meshed with the inner edge of a double-sided gear transmission ring, and at least four tensioning grooves are provided on the surface of the rotating gear disk, each of which is slidably connected to a tensioning shaft, and a synchronous transmission belt is connected to the tensioning shaft, the linkage shaft and the planetary gear columns.

[0017] Preferably, the synchronous transmission assembly further includes at least four pre-tensioning springs, each of which is fixedly connected between the inner wall of the tensioning groove and the tensioning shaft, and the tensioning shaft is located on a side of the tensioning groove away from the planetary gear column.

[0018] Preferably, a recess is formed on the inner wall of the fixed base, a protrusion is fixedly connected to the lower surface of the rotating gear disc, and the rotating gear disc is mounted on the surface of the fixed base through rotational cooperation between the recess and the protrusion.

[0019] Preferably, the bottom of the fixed base is in contact with the surface of the computer accessory.

[0020] Preferably, the screw supply cylinder consists of an elastic swing cylinder and a base cylinder, and the elastic swing cylinder and the base cylinder are hinged by a torsion spring. When the electric screwdriver module descends, the elastic swing cylinder is pressed against the spindle housing. When the electric screwdriver module rises, the elastic swing cylinder is elastically reset.

[0021] Preferably, a positioning detection sensor is provided at the lower end of the electric screwdriver module, and the positioning detection sensor is used to detect the alignment of the screw and the electric screwdriver module. When it is detected that the screw and the electric screwdriver module are not aligned, the centripetal friction mechanism drives the friction shaft to rotate and adjusts the screw posture until the positioning detection sensor detects that the screw and the electric screwdriver module are aligned, and then the electric screwdriver module performs the rotation operation again.

[0022] Preferably, the external driving device is a servo motor, which is in transmission connection with the electric screwdriver module. The servo motor accurately controls the lifting and rotating movements of the electric screwdriver module to ensure the accuracy and stability of the screw-tightening process.

[0023] Preferably, the external feeding mechanism is a vibration plate feeding mechanism, which is connected to the screw supply cylinder. The screws are arranged in order and transported into the screw supply cylinder through the vibration of the vibration plate, thereby realizing automatic feeding of the screws.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] 1. In response to the problem of alignment between screws and electric screwdriver modules in the prior art, the present invention proposes an innovative solution. The core of the solution is to allow the screw to actively rotate to accurately align with the electric screwdriver module, rather than relying on the rotation of the screwdriver. This change is of great significance. In the production process of the existing automated screwing device, after the screw is delivered to the specified position by the external feeding mechanism, the traditional device often requires the electric screwdriver module to rotate first to find the alignment state. This process can easily cause the screw to shift and skew, affecting the subsequent screwing quality. The centripetal friction mechanism of the present invention is driven by the power distribution unit during the descent of the electric screwdriver module, so that the friction shaft moves centrifugally and rotates, driving the screw to rotate and adjust its posture. This method avoids the disadvantages brought by the screwdriver rotating first, and there is no need to wait for the screwdriver to rotate and align. It is naturally integrated into the existing production process, greatly improving the overall production efficiency and providing strong support for large-scale production of enterprises.

[0026] 2. In the prior art, when the screwdriver rotates to align the screw, the friction between the screw and the screw can easily cause scratches on the surface of the screw, especially for computer accessories with high surface precision requirements, which will increase the product defect rate. The centripetal friction mechanism of the present invention uses the centripetal movement and rotation of the friction shaft to adjust the screw posture. The friction force generated by the contact between the friction shaft and the screw acts accurately on the screw, causing it to rotate smoothly, effectively avoiding excessive friction and unnecessary contact that may occur when the screwdriver rotates. At the same time, the design of the centripetal friction mechanism ensures the stability and controllability of the contact between the friction shaft and the screw, greatly reducing the risk of scratches on the screw surface, improving the product qualification rate, and reducing the cost loss of the enterprise caused by product defects.

[0027] 3. In the prior art, when a screwdriver rotates to find the alignment position, it is very easy to contact or even collide with the surface of the computer accessory if the operation is improper, thereby damaging the surface of the accessory. The surface of the computer accessory is fragile. Once damaged, it not only affects the appearance, but may also have an adverse effect on its normal function and service life. The centripetal friction mechanism of the present invention mainly acts on the screw itself during the process of adjusting the screw posture, and drives the screw to rotate through the centripetal movement and rotation of the friction shaft, without direct contact with the surface of the computer accessory. This design effectively avoids the risk of collision between the screwdriver and the surface of the computer accessory, protects the surface quality of the computer accessory, ensures its normal function and service life, and saves the company the repair and replacement costs caused by damaged accessories.

[0028] 4. The method of rotating the screwdriver first and then aligning the screw in the prior art increases the screwing process time and reduces production efficiency. The centripetal friction mechanism of the present invention starts working synchronously when the electric screwdriver module descends and approaches the screw position, without the need for additional waiting time. Driven by the power distribution unit, the friction shaft moves centripetally and rotates rapidly, driving the screw to rotate and adjust its posture to achieve precise alignment with the electric screwdriver module. The entire process is synchronized with the descending action of the electric screwdriver module, seamlessly connected, and greatly shortens the screwing time of each screw. In large-scale production, this time saving will accumulate into a significant efficiency improvement, enabling enterprises to better meet the market demand for efficient production and enhance the market competitiveness of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front perspective schematic diagram of the main structure of the present invention;

[0030] Figure 2 It is a schematic diagram of the motion plane of the main structure loading process of the present invention;

[0031] Figure 3 This is a schematic diagram of the motion plane of the main structure of the present invention during the screwing process;

[0032] Figure 4 It is a partial three-dimensional schematic diagram of the centripetal friction mechanism and power distribution unit of the present invention;

[0033] Figure 5 is a three-dimensional schematic diagram of a power distribution unit of the present invention;

[0034] Figure 6 It is a three-dimensional schematic diagram of the centripetal friction mechanism of the present invention;

[0035] Figure 7 It is a three-dimensional schematic diagram of the synchronous transmission assembly of the present invention;

[0036] Figure 8 It is a three-dimensional schematic diagram of the matching relationship between the fixed base plate and the rotating gear plate of the present invention.

[0037] In the picture:

[0038] 1. Spindle housing; 2. Electric screwdriver module; 3. Screw supply cylinder; 31. Elastic swing cylinder; 32. Base cylinder; 4. Centripetal friction mechanism; 41. Fixed base plate; 411. Concave portion; 42. Linear guide groove; 43. Rotating gear plate; 431. Protrusion; 44. Arc guide groove; 45. Linkage shaft; 46. Friction shaft; 5. Power distribution unit; 51. Drive motor; 52. Layered drive unit; 521. Upper gear; 522. Lower gear; 6. Double-sided gear transmission ring; 7. Synchronous transmission assembly; 71. Planetary gear column; 72. Tensioning groove; 73. Preload spring; 74. Tensioning shaft; 75. Synchronous transmission belt. DETAILED DESCRIPTION

[0039] 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. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0040] It should be noted that the external drive device only provides the function of moving up and down and rotating the electric screwdriver module 2, the external loading mechanism only provides the function of loading screws, and the positioning detection sensor only provides the function of detecting the position of the screws. The working principle and specific structure of the above structure are both existing technologies. Therefore, in view of the versatility of the above structure, its specific principle will not be repeated later.

[0041] See also Figures 1 to 8 , the present invention provides an embodiment:

[0042] A screw tightening and fixing device for processing computer accessories includes a spindle housing 1, an electric screwdriver module 2 is installed inside the spindle housing 1, the electric screwdriver module 2 is connected to an external drive device, a screw supply cylinder 3 is installed on the side wall of the spindle housing 1, the screw supply cylinder 3 is connected to an external feeding mechanism, a centripetal friction mechanism 4 is installed at the bottom of the spindle housing 1, the centripetal friction mechanism 4 includes at least four friction shafts 46, a double-sided tooth transmission ring 6 is installed inside the centripetal friction mechanism 4, at least four synchronous transmission components 7 are installed inside the centripetal friction mechanism 4, a power distribution unit 5 is installed on the side wall of the spindle housing 1, the power distribution unit 5 drives the centripetal friction mechanism 4, under the action of the synchronous transmission component 7 and the double-sided tooth transmission ring 6, the friction shaft 46 moves toward one side of the center of the spindle housing 1, and the friction shaft 46 can rotate while moving centripetally, and the posture of the screw on the computer accessory is adjusted by rotation so that it is aligned with the electric screwdriver module 2.

[0043] It should be noted that the power distribution unit 5 is composed of a drive motor 51 and a layered drive unit 52. The drive motor 51 is installed on the outer wall of the main shaft housing 1, and the layered drive unit 52 is fixedly connected to the output shaft of the drive motor 51. The centripetal friction mechanism 4 also includes a fixed base plate 41 and a rotating toothed disc 43. The fixed base plate 41 is fixedly connected to the bottom of the main shaft housing 1, and the rotating toothed disc 43 is rotatably connected to the inside of the fixed base plate 41. The layered drive unit 52 is composed of an upper gear 521 and a lower gear 522. The upper gear 521 is engaged with the double-sided gear transmission ring 6, and the lower gear 522 is engaged with the rotating toothed disc 43. The double-sided gear transmission ring 6 is rotatably connected to the inside of the fixed base plate 41. The surface of the fixed base plate 41 is annularly and equidistantly arranged with linear guide grooves 4 running through it. 2. The surface of the rotating toothed disc 43 is arranged in an annular shape with arc-shaped guide grooves 44 arranged at equal intervals. The interior of each linear guide groove 42 and the arc-shaped guide groove 44 is slidably connected with a linkage shaft 45. The friction shafts 46 are fixedly connected to the top of the linkage shaft 45. The middle of the fixed base plate 41 and the rotating toothed disc 43 are penetrated with a through hole. The synchronous transmission assembly 7 includes at least four planetary gear columns 71. The planetary gear columns 71 are rotatably connected to the surface of the rotating toothed disc 43. The planetary gear columns 71 are engaged with the inner edge of the double-sided gear transmission ring 6. The surface of the rotating toothed disc 43 is provided with at least four tensioning grooves 72. The tensioning grooves 72 are slidably connected with tensioning shafts 74. The tensioning shaft 74, the linkage shaft 45 and the planetary gear columns 71 are all connected with a synchronous transmission belt 7. 5. The synchronous transmission assembly 7 also includes at least four pre-tightening springs 73, which are fixedly connected between the inner wall of the tensioning groove 72 and the tensioning shaft 74. The tensioning shaft 74 is located in the tensioning groove 72 on the side away from the planetary gear column 71. The inner wall of the fixed base 41 is provided with a recess 411. The lower surface of the rotating gear disc 43 is fixedly connected with a protrusion 431. The rotating gear disc 43 is mounted on the surface of the fixed base 41 through the rotational cooperation of the recess 411 and the protrusion 431. The bottom of the fixed base 41 fits with the surface of the computer accessories. The screw supply cylinder 3 consists of an elastic swing cylinder 31 and a base cylinder 32. The elastic swing cylinder 31 and the base cylinder 32 are hinged by a torsion spring. When the electric screwdriver module 2 descends, it contacts the elastic swing cylinder 31 to make it away from the spindle housing 1. When the dynamic screwdriver module 2 rises, the elastic swing cylinder 31 elastically resets, and a positioning detection sensor is provided at the lower end of the electric screwdriver module 2. The positioning detection sensor is used to detect the alignment of the screw and the electric screwdriver module 2. When it is detected that the screw and the electric screwdriver module 2 are not aligned, the centripetal friction mechanism 4 drives the friction shaft 46 to rotate and adjust the screw posture until the positioning detection sensor detects that the screw is aligned with the electric screwdriver module 2. After that, the electric screwdriver module 2 performs the rotation operation again. The external driving device is a servo motor, which is connected to the electric screwdriver module 2. The servo motor accurately controls the lifting and rotating actions of the electric screwdriver module 2 to ensure the accuracy and stability of the screw tightening process. The external feeding mechanism is a vibration plate feeding mechanism.The vibrating plate feeding mechanism is connected to the screw feeding cylinder 3. The vibration of the vibrating plate arranges the screws in an orderly manner and feeds them into the screw feeding cylinder 3, thus realizing automatic feeding of the screws.

[0044] Specifically, when it is necessary to screw and fix computer accessories, the external loading mechanism first arranges the screws in order and transports them into the screw supply tube 3. Under the action of their own gravity and the continuous vibration of the vibration disk, the screws slide down along the channel of the screw supply tube 3, and finally pass through the middle through hole in the middle of the fixed base plate 41 and the rotating gear plate 43, and fall accurately on the corresponding screw hole position on the surface of the computer accessory.

[0045] After the screw reaches the specified position, the electric screwdriver module 2 is started. The electric screwdriver module 2 starts to move downward under the drive of the external driving device. During the downward movement, the lower end of the electric screwdriver module 2 will contact the elastic swing cylinder 31 of the screw supply cylinder 3, causing it to overcome the elastic force of the torsion spring and swing to the side away from the spindle housing 1, thereby making room for subsequent operations of the electric screwdriver module 2.

[0046] As the electric screwdriver module 2 continues to move downward, when it approaches the screw position, the power distribution unit 5 starts to work.

[0047] The driving motor 51 in the power distribution unit 5 is started, and the output shaft of the driving motor 51 drives the layered driving unit 52 to rotate. The layered driving unit 52 is composed of an upper gear 521 and a lower gear 522. The lower gear 522 is engaged with the rotating gear disc 43, so the rotation of the lower gear 522 will drive the rotating gear disc 43 to rotate inside the fixed base disc 41.

[0048] Since the fixed base plate 41 is fixedly connected to the bottom of the spindle housing 1, its position remains stationary, and the surface of the rotating gear plate 43 is arranged in a ring-shaped and equidistant manner and is penetrated by arc guide grooves 44, and the corresponding position of the surface of the fixed base plate 41 is provided with linear guide grooves 42, and the linkage shaft 45 is slidably connected in the arc guide grooves 44 and the linear guide grooves 42 at the same time.

[0049] When the rotating gear disc 43 rotates, the linkage shaft 45 will slide along the trajectory of the arc guide groove 44 and the linear guide groove 42 toward the side close to the center of the screw under the joint restriction of the arc guide groove 44 and the linear guide groove 42. Therefore, the friction shaft 46 on the linkage shaft 45 will move centripetally as the linkage shaft 45 slides, gradually approaching the screw.

[0050] At the same time, the upper gear 521 in the layered drive unit 52 is engaged with the double-sided gear transmission ring 6. The rotation of the upper gear 521 drives the double-sided gear transmission ring 6 to rotate, and the planetary gear columns 71 in the synchronous transmission assembly 7 are all engaged with the inner edge of the double-sided gear transmission ring 6. Therefore, the rotation of the double-sided gear transmission ring 6 will drive the planetary gear columns 71 to rotate on the surface of the rotating gear disc 43.

[0051] At the same time, the rotation of the planetary gear column 71 drives the linkage shaft 45 to rotate synchronously through the synchronous transmission belt 75. The rotation of the linkage shaft 45 then drives the friction shaft 46 to rotate.

[0052] During the centripetal movement and rotation of the friction shaft 46, its surface contacts the screw, generating friction. On the one hand, the centripetal movement of the friction shaft 46 will center the screw to ensure that the screw is accurately positioned on the screw hole of the computer accessory; on the other hand, the rotation of the friction shaft 46 and the friction between it and the screw will drive the screw to rotate, thereby adjusting the posture of the screw to align it with the lower end of the electric screwdriver module 2. In this process, as the linkage shaft 45 continues to move centripetally, the preload spring 73 in the synchronous transmission assembly 7 will gradually be compressed, and the tensioning shaft 74 will move in the tensioning groove 72 toward the side close to the planetary gear column 71 to ensure that the synchronous transmission belt 75 is always in a tensioned state, thereby ensuring the stability and accuracy of the transmission.

[0053] When the positioning detection sensor at the lower end of the electric screwdriver module 2 detects that the screw is aligned with the electric screwdriver module 2, the friction force between the friction shaft 46 and the screw reaches its limit and can no longer drive the screw to rotate. At this time, the power distribution unit 5 and the centripetal friction mechanism 4 stop working, and the drive motor 51 reverses, driving the layered drive unit 52, the rotating gear plate 43 and other components to reset. The friction shaft 46 gradually moves away from the screw under the elastic force of the preload spring 73 and returns to its initial position.

[0054] Finally, the electric screwdriver module 2 continues to move downward under the drive of the external drive device until its lower end is completely engaged with the screw, and then the lower end of the electric screwdriver module 2 rotates to screw the screw into the screw hole on the computer accessory, completing the entire screw tightening operation. After the electric screwdriver module 2 completes the screw tightening operation, it moves upward. At this time, the elastic swing cylinder 31 of the screw supply cylinder 3 is elastically reset under the elastic force of the torsion spring, waiting for the next screw feeding and tightening operation.

[0055] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0056] 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. A screw-tightening and fixing device for processing computer accessories, comprising a spindle housing (1), an electric screwdriver module (2) installed inside the spindle housing (1), the electric screwdriver module (2) being connected to an external drive device, a screw supply cylinder (3) being installed on the side wall of the spindle housing (1), the screw supply cylinder (3) being connected to an external feeding mechanism, characterized in that: A centripetal friction mechanism (4) is installed at the bottom of the spindle housing (1), and the centripetal friction mechanism (4) includes at least four friction shafts (46). A double-sided tooth transmission ring (6) is installed inside the centripetal friction mechanism (4), and at least four synchronous transmission components (7) are installed inside the centripetal friction mechanism (4). A power distribution unit (5) is installed at the side wall of the spindle housing (1). The power distribution unit (5) drives the centripetal friction mechanism (4), and under the action of the synchronous transmission component (7) and the double-sided tooth transmission ring (6), the friction shaft (46) moves toward one side of the center of the spindle housing (1), and the friction shaft (46) can rotate while moving centripetally, and the posture of the screws on the computer accessories is adjusted by the rotation so that they are aligned with the electric screwdriver module (2).

2. The screw tightening and fixing device for computer parts processing according to claim 1, characterized in that: The power distribution unit (5) is composed of a drive motor (51) and a layered drive unit (52), wherein the drive motor (51) is mounted on the outer wall of the spindle housing (1), and the layered drive unit (52) is fixedly connected to the output shaft of the drive motor (51). The centripetal friction mechanism (4) also includes a fixed base plate (41) and a rotating toothed plate (43), wherein the fixed base plate (41) is fixedly connected to the bottom of the spindle housing (1), and the rotating toothed plate (43) is rotatably connected to the interior of the fixed base plate (41).

3. The screw tightening and fixing device for computer parts processing according to claim 2, characterized in that: The layered drive unit (52) is composed of an upper gear (521) and a lower gear (522), wherein the upper gear (521) is engaged with a double-sided gear transmission ring (6), and the lower gear (522) is engaged with a rotating toothed disc (43), and the double-sided gear transmission ring (6) is rotatably connected to the interior of a fixed base disc (41).

4. The screw tightening and fixing device for computer parts processing according to claim 2, characterized in that: The surface of the fixed base plate (41) is provided with linear guide grooves (42) arranged in an annular manner and equidistantly therethrough, and the surface of the rotating gear plate (43) is provided with arc guide grooves (44) arranged in an annular manner and equidistantly therethrough. A linkage shaft (45) is slidably connected to the interior of each of the linear guide grooves (42) and the arc guide groove (44), and the friction shafts (46) are fixedly connected to the top of the linkage shaft (45).

5. The screw tightening and fixing device for computer parts processing according to claim 2, characterized in that: The middle parts of the fixed base disc (41) and the rotating gear disc (43) are both penetrated by a central through hole.

6. The screw tightening and fixing device for computer parts processing according to claim 2, characterized in that: The synchronous transmission assembly (7) includes at least four planetary gear columns (71), each of which is rotatably connected to the surface of a rotating toothed disc (43), and each of which is meshed with the inner edge of a double-sided gear transmission ring (6). The surface of the rotating toothed disc (43) is provided with at least four tensioning grooves (72), and each of the tensioning grooves (72) is slidably connected to a tensioning shaft (74). A synchronous transmission belt (75) is connected between the tensioning shaft (74), the linkage shaft (45) and the planetary gear columns (71).

7. The screw tightening and fixing device for computer parts processing according to claim 6, characterized in that: The synchronous transmission assembly (7) further comprises at least four preload springs (73), each of which is fixedly connected between the inner wall of the tensioning groove (72) and a tensioning shaft (74), and the tensioning shaft (74) is located on a side of the tensioning groove (72) away from the planetary gear column (71).

8. The screw tightening and fixing device for computer parts processing according to claim 2, characterized in that: The inner wall of the fixed base disc (41) is provided with a recess (411), the lower surface of the rotating gear disc (43) is fixedly connected with a protrusion (431), and the rotating gear disc (43) is mounted on the surface of the fixed base disc (41) through the rotational cooperation of the recess (411) and the protrusion (431).

9. The screw tightening and fixing device for computer parts processing according to claim 2, characterized in that: The bottom of the fixed base plate (41) is in contact with the surface of the computer accessories.

10. The screw tightening and fixing device for computer parts processing according to claim 1, characterized in that: The screw supply cylinder (3) is composed of an elastic swing cylinder (31) and a base cylinder (32). The elastic swing cylinder (31) and the base cylinder (32) are hinged via a torsion spring. When the electric screwdriver module (2) descends, it abuts against the elastic swing cylinder (31) to keep it away from the spindle housing (1). When the electric screwdriver module (2) ascends, the elastic swing cylinder (31) elastically resets.

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