Positioning assembly, displacement device and automatic screwing apparatus

Abstract

The present application relates to a kind of positioning assembly, positioner and automatic screwing device.Therein, positioning assembly includes fixed block, positioning block, first driving member and limit block, positioning block is movably arranged between first working position and first disengagement position, wherein, the positioning block in first working position cooperates with fixed block to hold first part, the positioning block in first disengagement position is spaced apart from first part;First driving member is connected with positioning block to drive positioning block to move between first working position and first disengagement position;Limit block is provided with first plane, and first plane is used to abut with the vertical plane of second part.The positioning assembly of the present application can fix and position first part and semicircular arc part, can ensure the alignment of the assembly position of first part and semicircular arc part, can avoid the deflection of first part and semicircular arc part in the process of tightening screw, ensure the success rate of screw and first part and semicircular arc part assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automatic assembly, in particular to a positioning assembly, a displacement device and an automatic screwing device. BACKGROUND

[0002] Screw connection is a common fixed connection mode between two parts. At present, the main mode for realizing automatic tightening of multiple screws on the market is to set multiple tightening shafts and multiple tightening guns, and after positioning the two parts, multiple tightening guns are operated simultaneously to complete the tightening of the screws.

[0003] However, for the semicircular arc part with multiple screw installation positions, the positioning mode is usually external arc positioning. When tightening the screws, the semicircular arc part is easy to deflect under the tightening action of the tightening gun, which affects the assembly success rate of the part. Moreover, due to limited space, it is difficult to realize the simultaneous operation of multiple tightening shafts or tightening guns for tightening multiple screws at multiple positions, so in related technologies, manual assembly or semi-automatic equipment is used for positioning the parts before tightening, which is low in assembly efficiency. SUMMARY

[0004] The present application aims to at least solve one of the technical problems in the related art. To this end, an embodiment of the present application proposes a positioning assembly that can ensure the alignment of the assembly positions of the first part and the semicircular arc part, avoid the deflection of the first part and the semicircular arc part during screw tightening, and ensure the success rate of screw assembly with the first part and the semicircular arc part.

[0005] An embodiment of the present application also proposes a displacement device.

[0006] An embodiment of the present application also proposes an automatic screwing device.

[0007] The positioning assembly of the embodiment of the present application comprises:

[0008] A fixed block;

[0009] A positioning block movably arranged between a first working position and a first disengagement position, wherein the positioning block in the first working position cooperates with the fixed block to clamp the first part, and the positioning block in the first disengagement position is spaced apart from the first part;

[0010] A first driving member connected with the positioning block to drive the positioning block to move between the first working position and the first disengagement position; and

[0011] A limiting block provided with a first plane for abutting against a vertical plane of the second part.

[0012] The positioning assembly of the embodiment of the present application can fix and position the first part and the semicircular part, can ensure the alignment of the assembly position of the first part and the semicircular part, and can avoid the deflection of the first part and the semicircular part in the process of tightening the screw, thereby ensuring the success rate of the assembly of the screw and the first part and the semicircular part.

[0013] In some embodiments, the positioning assembly further comprises a second driving member connected with the limiting block to drive the limiting block to move between a second working position and a second disengaging position, wherein the first plane of the limiting block in the second working position abuts against the vertical plane of the second part, and the limiting block in the second disengaging position is disengaged from the second part.

[0014] In some embodiments, the fixing block is provided with a second plane and a third plane, the second plane and the third plane are perpendicular, and each of the second plane and the third plane is used to abut against the first part; the limiting block is provided with a fourth plane and a fifth plane, the fourth plane and the fifth plane are perpendicular, the fourth plane is opposite to the second plane, the fifth plane is opposite to the third plane, and each of the fourth plane and the fifth plane is used to abut against the first part.

[0015] In some embodiments, the fixing block is provided with a detection hole; the positioning assembly further comprises a first sensor, the first sensor passes through the detection hole to detect the first part.

[0016] In some embodiments, the positioning assembly further comprises a first sliding rail, the first sliding rail is fixedly arranged, the limiting block is provided with a first limiting groove, and the first sliding rail is matched in the first limiting groove.

[0017] In some embodiments, the number of the first planes is two, the two first planes are respectively located on the two sides of the limiting block; the limiting block is provided with an avoiding groove, and the avoiding groove is located between the two first planes.

[0018] The displacement device of the embodiment of the present application comprises:

[0019] A positioning assembly, which is the positioning assembly of any one of the above embodiments;

[0020] An X-axis moving mechanism connected with the positioning assembly to drive the positioning assembly to move in the X-axis direction; and

[0021] A Y-axis moving mechanism connected with the X-axis moving mechanism to drive the positioning assembly to move in the Y-axis direction.

[0022] The positioner of the embodiment of the present application fixes and positions the first part and the second part through the positioning assembly, and realizes the movement of the first part and the second part in the X-axis direction and the Y-axis direction through the X-axis moving mechanism and the Y-axis moving mechanism, so that different screw holes on the second part can be respectively corresponding to one tightening gun of the automatic screw tightening device of the embodiment of the present application, and one tightening gun of the automatic screw tightening device of the embodiment of the present application can tighten multiple screws in different positions.

[0023] In some embodiments, the Y-axis moving mechanism comprises a fixed frame, a driving motor, a lead screw and a first moving plate, the driving motor is arranged on the fixed frame, the lead screw is rotatably arranged on the fixed frame, the driving motor is connected with the lead screw to drive the lead screw to rotate, the first moving plate is slidably arranged on the fixed frame in the Y-axis direction, the first moving plate is in transmission connection with the lead screw, and the X-axis moving mechanism is arranged on the first moving plate; the X-axis moving mechanism comprises an electric cylinder and a second moving plate, the electric cylinder is arranged on the first moving plate, the second moving plate is slidably arranged on the first moving plate in the X-axis direction, the electric cylinder is connected with the second moving plate, and the positioning assembly is arranged on the second moving plate.

[0024] The automatic screw tightening device of the embodiment of the present application comprises the positioner of any one of the above-mentioned embodiments.

[0025] The automatic screw tightening device of the embodiment of the present application can use one tightening gun to perform screw tightening operation on multiple screw holes on the semicircular part, compared with the related art, one tightening gun occupies less space, and manual participation in the assembly of the part and the screw is not required, and the automatic degree is higher. Meanwhile, in the process of tightening the screw, the first part and the second part can be prevented from being deflected, and the assembly success rate of the first part, the second part and the screw is ensured.

[0026] In some embodiments, the automatic screw tightening device further comprises a laser displacement sensor, the laser displacement sensor is fixedly arranged, and the laser displacement sensor is used for detecting the height of the screw on the second part. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the automatic screw tightening device of the embodiment of the present application;

[0028] Figure 2 is Figure 1 a partial enlarged view in the figure;

[0029] Figure 3 is a top view of the positioner of the embodiment of the present application;

[0030] Figure 4Fig. 2 is a structural schematic diagram of an automatic screwing device according to an embodiment of the present application.

[0031] Reference signs:

[0032] Automatic screwing device 1000;

[0033] Positioning device 100;

[0034] Positioning assembly 1;

[0035] Fixed block 11, positioning block 12, first driving member 13, limiting block 14, first plane 141, avoiding groove 142, second driving member 15, first sensor 16, first sliding rail 17;

[0036] X-axis moving mechanism 2, electric cylinder 21, second moving plate 22, X-axis sliding rail 23;

[0037] Y-axis moving mechanism 3, fixed frame 31, driving motor 32, lead screw 33, first moving plate 34, Y-axis sliding rail 35;

[0038] Laser displacement sensor 4;

[0039] First part 5, second part 6, arc-shaped part 61. DETAILED DESCRIPTION

[0040] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below by referring to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0041] As Figures 1 to 4As shown, the automatic screw-tightening device 1000 of this embodiment is used to tighten screws connecting a first part 5 and a second part 6. The first part 5 has multiple screw holes, and the second part 6 is a semi-circular arc part. The outer circumferential surface of the semi-circular arc part includes an arc-shaped portion 61 and a flat portion. The semi-circular arc part has multiple through holes, each corresponding to a screw hole. The second part 6 is mounted on the first part 5, and the screw passes through the through holes on the second part 6 and engages with the screw holes on the first part 5 for tightening. The automatic screw-tightening device 1000 of this embodiment includes a displacement device 100. The displacement device 100 includes a positioning component 1, an X-axis moving mechanism 2, and a Y-axis moving mechanism 3. The X-axis moving mechanism 2 is connected to the positioning component 1 to move the positioning component 1 in the X-axis direction, and the Y-axis moving mechanism 3 is connected to the X-axis moving mechanism 2 to move the positioning component 1 in the Y-axis direction. The positioning component 1 is mounted on the X-axis moving mechanism 2, and the X-axis moving mechanism 2 is mounted on the Y-axis moving mechanism 3. The positioning assembly 1 includes a fixing block 11, a positioning block 12, a first driving member 13, and a limiting block 14. The positioning block 12 is movably disposed between a first working position and a first disengaged position. In the first working position, the positioning block 12 cooperates with the fixing block 11 to clamp the first part 5, while in the first disengaged position, the positioning block 12 is spaced apart from the first part 5. The first driving member 13 is connected to the positioning block 12 to drive the positioning block 12 to move between the first working position and the first disengaged position. The limiting block 14 has a first plane 141, which abuts against the vertical plane of the second part 6.

[0042] by Figure 1 The automatic tightening device 1000 of this invention will be described using an example. Figure 1 In the middle, the front-back direction is the same as the X-axis direction, and the left-right direction is the same as the Y-axis direction. The outer peripheral surface of the semi-circular arc part extends in the up-down direction, so the planar part of the outer peripheral surface of the semi-circular arc part extends in the vertical direction. That is to say, the planar part of the outer peripheral surface of the semi-circular arc part is a vertical plane.

[0043] The automatic screwing device 1000 of the embodiment of the present application is used first to place the first part 5 and the second part 6 on the positioning assembly 1: the first part 5 is placed between the fixed block 11 and the positioning block 12, the first driving member 13 drives the positioning block 12 to move towards the first part 5 to make the positioning block 12 reach the first working position, the positioning block 12 at the first working position abuts against the first part 5, and the fixed block 11 and the positioning block 12 at the first working position cooperate to fix the first part 5; the second part 6 is installed on the first part 5, and the vertical plane of the second part 6 abuts against the first plane 141 of the limiting block 14 to prevent the second part 6 from rotating, thereby realizing the positioning of the second part 6. Then the X-axis moving mechanism 2 and / or the Y-axis moving mechanism 3 moves to drive the positioning assembly 1, the first part 5 and the second part 6 to move, so that the first part 5 and the second part 6 move to the position corresponding to the screwing gun (not shown in the figure) of the automatic screwing device, and the screwing gun corresponds to one of the screw holes, the screwing gun moves towards the screw hole, and then the screwing operation is performed. When the screwing of the first screw is completed, the X-axis moving mechanism 2 and / or the Y-axis moving mechanism 3 moves to make the screwing gun correspond to the second screw hole, and then the screwing of the second screw is performed. Until the screwing operation of all the screw holes is completed.

[0044] The positioning assembly 1 of the embodiment of the present application fixes the first part 5 through cooperation of the fixed block 11 and the positioning block 12 at the first working position, which can avoid the deflection of the first part 5 during screwing, and the first plane 141 of the limiting block 14 abuts against the vertical plane of the second part 6, which can block the rotation of the second part 6, thereby avoiding the deflection of the second part 6 during screwing, ensuring the alignment of the assembly position of the second part 6 and the first part 5, and guaranteeing the success rate of assembly of the screw and the first part 5 and the second part 6.

[0045] Therefore, the positioning assembly 1 of the embodiment of the present application fixes and positions the first part 5 and the semicircular part, which can ensure the alignment of the assembly position of the first part 5 and the semicircular part, avoid the deflection of the first part 5 and the semicircular part during screwing, and guarantee the success rate of assembly of the screw and the first part 5 and the semicircular part.

[0046] When the outer circumferential surface of the second part 6 includes multiple planes (in other words, the outer contour of the outer circumferential surface of the second part 6 on the horizontal plane is a polygon, such as a quadrilateral, a hexagon, etc.), the multiple planes of the outer circumferential surface of the second part 6 are vertical planes, the first plane 141 of the limiting block 14 abuts against the vertical plane of the second part 6, which can also block the rotation of the second part 6 and avoid the deflection of the second part 6 during screwing.

[0047] Further, the position changing device 100 fixes and positions the first part 5 and the second part 6 through the positioning assembly 1, drives the positioning assembly 1 to move in the X-axis direction through the X-axis moving mechanism 2, that is, drives the first part 5 and the second part 6 to move in the X-axis direction, drives the X-axis moving mechanism 2 to move in the Y-axis direction through the Y-axis moving mechanism 3, thereby driving the positioning assembly 1, the first part 5 and the second part 6 to move in the Y-axis direction, so as to realize the movement of the first part 5 and the second part 6 in the X-axis direction and the Y-axis direction, so that different screw holes on the second part 6 can be respectively corresponding to one tightening gun of the automatic screw tightening device 1000, and one tightening gun of the automatic screw tightening device can tighten multiple screws in different positions.

[0048] Therefore, the automatic screw tightening device can use one tightening gun to tighten multiple screw holes on the semicircular part, compared with the related art, one tightening gun occupies less space, and does not need manual participation in the assembly of the parts and the screws, and has a higher degree of automation. Meanwhile, in the process of tightening the screws, the first part 5 and the second part 6 can be prevented from being deflected, and the assembly success rate of the first part 5, the second part 6 and the screws is ensured.

[0049] In order to make the scheme of the present application easier to understand, the X-axis direction is taken as an example for description, which is the front-back direction in the figure, and the Y-axis direction is taken as an example for description, which is the left-right direction in the figure. Figures 1 to 4 Figures 1 to 4 Figures 1 to 3

[0050] The automatic screw tightening device 1000 includes a rack (not shown in the figure), a tightening gun (not shown in the figure), the position changing device 100 and the laser displacement sensor 4, and each of the tightening gun, the position changing device 100 and the laser displacement sensor 4 is arranged on the rack.

[0051] The position changing device 100 includes the positioning assembly 1, the X-axis moving mechanism 2 and the Y-axis moving mechanism 3.

[0052] The Y-axis moving mechanism 3 includes a fixed rack 31, a driving motor 32, a lead screw 33 and a first moving plate 34. The fixed rack 31 is arranged on the rack. The driving motor 32 is arranged on the fixed rack 31, the lead screw 33 is rotatably arranged on the fixed rack 31, the extension direction of the lead screw 33 is the same as the Y-axis direction, the driving motor 32 is connected with the lead screw 33 to drive the lead screw 33 to rotate, the first moving plate 34 is slidably arranged on the fixed rack 31 in the Y-axis direction, the first moving plate 34 is in transmission connection with the lead screw 33, and the X-axis moving mechanism 2 is arranged on the first moving plate 34.

[0053] ​​​Optionally, the driving motor 32 is a servo motor, and a power output shaft of the servo motor is connected with the screw rod 33 through a shaft coupling. The driving motor 32 drives the screw rod 33 to rotate, thereby driving the first moving plate 34 to move along the Y-axis direction, and driving the X-axis moving mechanism 2 to move along the Y-axis direction.

[0054] The Y-axis moving mechanism 3 drives the first moving plate 34 to move by rotating the screw rod 33, so that the movement of the first moving plate 34 has high precision and self-locking performance, thereby ensuring the accuracy of the movement and positioning of the first part 5 and the second part 6 along the Y-axis direction.

[0055] Optionally, the Y-axis moving mechanism 3 further comprises a Y-axis sliding rail 35, which is arranged on the fixed frame 31 and extends along the Y-axis direction. The first moving plate 34 is provided with a Y-axis sliding groove, and the Y-axis sliding rail 35 is matched in the Y-axis sliding groove. The matching of the Y-axis sliding rail 35 and the Y-axis sliding groove guides and limits the movement of the first moving plate 34, thereby ensuring the stability and safety of the movement of the first moving plate 34, avoiding the deflection of the first moving plate 34 during the screw tightening process, and thereby ensuring the stability and safety of the movement of the positioning assembly 1 and the first part 5 and the second part 6 along the Y-axis direction.

[0056] The X-axis moving mechanism 2 comprises an electric cylinder 21 and a second moving plate 22. The electric cylinder 21 is arranged on the first moving plate 34, and the second moving plate 22 is slidably arranged on the first moving plate 34 along the X-axis direction. The electric cylinder 21 is connected with the second moving plate 22 to drive the second moving plate 22 to move along the X-axis direction, and the positioning assembly 1 is arranged on the second moving plate 22.

[0057] The X-axis moving mechanism 2 drives the second moving plate 22 to move by using the electric cylinder 21, so that the movement of the second moving plate 22 has high precision and self-locking performance, thereby ensuring the accuracy of the movement and positioning of the first part 5 and the second part 6 along the X-axis direction.

[0058] Optionally, the X-axis moving mechanism 2 further comprises an X-axis sliding rail 23, which is arranged on the first moving plate 34. The second moving plate 22 is provided with an X-axis sliding groove, and the X-axis sliding rail 23 is matched in the X-axis sliding groove. The matching of the X-axis sliding rail 23 and the X-axis sliding groove guides and limits the movement of the second moving plate 22, thereby ensuring the stability and safety of the movement of the second moving plate 22, avoiding the deflection of the second moving plate 22 during the screw tightening process, and thereby ensuring the stability and safety of the movement of the positioning assembly 1 and the first part 5 and the second part 6 along the X-axis direction.

[0059] The positioning assembly 1 comprises a fixed block 11, a positioning block 12, a first driving member 13, a limiting block 14, a second driving member 15, a first sensor 16, and a first sliding rail 17.

[0060] The fixed block 11 is fixedly arranged on the second moving plate 22. The positioning block 12 is movably arranged on the second moving plate 22 between the first working position and the first disengaging position. When the positioning block 12 is located at the first working position, the positioning block 12 cooperates with the fixed block 11 to clamp the first part 5. When the positioning block 12 is located at the first disengaging position, the positioning block 12 is spaced apart from the first part 5. The positioning block 12 located at the first working position abuts each of the fixed block 11 to clamp the first part 5, so that the first part 5 is fixed.

[0061] The first driving member 13 is connected with the positioning block 12 to drive the positioning block 12 to move between the first working position and the first disengaging position. The first driving member 13 drives the positioning block 12 to move from the first disengaging position to the first working position, that is, drives the positioning block 12 to move towards the fixed block 11. The first driving member 13 drives the positioning block 12 to move from the first working position to the first disengaging position, that is, drives the positioning block 12 to move away from the fixed block 11.

[0062] Optionally, the first driving member 13 is a first air cylinder.

[0063] In some embodiments, the fixed block 11 is provided with a detection hole, and the first sensor 16 passes through the detection hole to detect the first part 5. When the first part 5 is placed on the second moving plate 22 and located between the fixed block 11 and the positioning block 12, the first sensor 16 detects a signal, and then the first driving member 13 operates to drive the positioning block 12 to move to the first working position, thereby fixing the first part 5. The arrangement of the first sensor 16 increases the degree of automation of the positioning assembly 1 and ensures the safety of the positioning assembly 1 in use, avoiding the idle running of the displacement device 100.

[0064] Specifically, the first sensor 16 is a proximity switch.

[0065] In some embodiments, the fixed block 11 is provided with a second plane and a third plane, the second plane and the third plane are perpendicular, the second plane and the third plane form a first right angle, and each of the second plane and the third plane is used to abut the first part 5. The positioning block 12 is provided with a fourth plane and a fifth plane, the fourth plane and the fifth plane are perpendicular, the fourth plane and the fifth plane form a second right angle, and each of the fourth plane and the fifth plane is used to abut the first part 5. The fourth plane is opposite to the second plane, the fifth plane is opposite to the third plane, the first right angle and the second right angle correspond to two non-adjacent angles of the first part 5 respectively, the fixed block 11 and the positioning block 12 abut the two non-adjacent angles of the first part 5 respectively, which forms resistance to the rotation of the first part 5, further prevents the first part 5 from being deflected when the screw is tightened, and further ensures the success rate of assembly of the screw with the first part 5 and the second part 6.

[0066] The first sliding rail 17 is fixedly arranged on the second moving plate 22, the positioning block 12 is provided with a first limiting groove, and the first sliding rail 17 is matched in the first limiting groove. The cooperation of the first sliding rail 17 and the first limiting groove guides and limits the movement of the positioning block 12, ensures the stability and safety of the movement of the positioning block 12, and the first sliding rail 17 can also increase the fixing strength of the positioning block 12 on the first part 5 when the positioning block 12 cooperates with the fixed block 11, increase the ability to resist the deflection of the first part 5, further avoid the rotation of the first part 5 in the process of tightening the screw, further ensure the fixed positioning effect of the positioning assembly 1 on the first part 5, and further improve the success rate of the assembly of the screw, the first part 5 and the second part 6.

[0067] The limiting block 14 is provided with a first plane 141, the first plane 141 is used for abutting against the vertical plane of the second part 6, can limit the rotational movement of the second part 6, and prevents the second part 6 from deflecting when the screw is tightened.

[0068] The second driving part 15 is connected with the limiting block 14 to drive the limiting block 14 to move between the second working position and the second disengagement position, wherein the first plane 141 of the limiting block 14 located at the second working position abuts against the vertical plane of the second part 6, and the limiting block 14 located at the second disengagement position is disengaged from the second part 6. The second driving part 15 drives the limiting block 14 to move from the second working position to the second disengagement position, increases the distance between the limiting block 14 and the second part 6, reduces the space obstruction for the movement of the second part 6 and the first part 5, facilitates the placement of the first part 5 between the fixed block 11 and the positioning block 12, and facilitates the installation of the second part 6 on the first part 5, and improves the convenience of the positioning assembly 1 in use.

[0069] Optionally, the second driving part 15 is a second air cylinder.

[0070] In some embodiments, the number of the first planes 141 is two, and the two first planes 141 are respectively located on the two sides of the limiting block 14. The two first planes 141 can position two second parts 6 installed on the first part 5. The limiting block 14 is provided with an avoiding groove 142 located between the two first planes 141. Figure 2 and Figure 3 The avoiding groove 142 reduces the space occupied by the limiting block 14, reduces the influence of the limiting block 14 on the upper side of the first part 5 and the second part 6, so as not to affect the installation of the first part 5 and the second part 6, and also increases the convenience of the tightening gun operation.

[0071] In some embodiments, the limiting block 14 is provided with a chamfer at one end away from the second driving member 15 in the first plane 141, which forms an avoidance for the movement of the second part 6, facilitating the installation of the second part 6 onto the first part 5 when the limiting block 14 is in the second disengagement position.

[0072] The laser displacement sensor 4 is fixedly arranged on the frame body, and detects the height of the screw on the second part 6. During the screw tightening process of the tightening gun, the laser displacement sensor 4 detects the height of the screw in real time, so as to determine whether the screw is tightened in place. If the laser displacement sensor 4 detects that the screw is not tightened after the tightening operation of the tightening gun is completed, the tightening gun performs re-tightening.

[0073] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0074] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0075] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected or can communicate with each other; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication or interaction relationship of two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] In the present application, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can be directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can be directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0077] In the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that a particular feature, structure, material or characteristic is included in at least one embodiment or example of the present application. Exemplary representations of the above terms in the present specification are not necessarily directed to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics can be combined in any suitable manner in one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0078] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary, and should not be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A positioning assembly, characterized by Comprising: a fixed block (11); a positioning block (12) movably arranged between a first working position and a first disengaging position, wherein the positioning block (12) in the first working position cooperates with the fixed block (11) to clamp a first part, and the positioning block (12) in the first disengaging position is spaced apart from the first part; a first driving member (13) connected with the positioning block (12) to drive the positioning block (12) to move between the first working position and the first disengaging position; a limiting block (14) provided with a first plane (141) for abutting against a vertical plane of a second part, the second part being a semicircular arc part, the outer peripheral surface of the semicircular arc part comprising an arc-shaped portion and a planar portion, the planar portion of the outer peripheral surface of the semicircular arc part being a vertical plane, the first plane being used for abutting against the vertical plane of the second part, the number of the first planes (141) being two, and the two first planes (141) being respectively located on two sides of the limiting block (14); the limiting block (14) is provided with an avoiding groove (142) located between the two first planes (141); a first sliding rail (17) fixedly arranged, and the positioning block (12) is provided with a first limiting groove, and the first sliding rail (17) is fitted in the first limiting groove; the fixed block (11) is provided with a second plane and a third plane, the second plane and the third plane are perpendicular, and each of the second plane and the third plane is used for abutting against the first part; the positioning block (12) is provided with a fourth plane and a fifth plane, the fourth plane and the fifth plane are perpendicular, the fourth plane is opposite to the second plane, the fifth plane is opposite to the third plane, and each of the fourth plane and the fifth plane is used for abutting against the first part.

2. The positioning assembly of claim 1, wherein, Further comprising a second driving member (15) connected with the limiting block (14) to drive the limiting block (14) to move between a second working position and a second disengaging position, wherein the first plane (141) of the limiting block (14) in the second working position abuts against the vertical plane of the second part, and the limiting block (14) in the second disengaging position is disengaged from the second part.

3. The positioning assembly of claim 1, wherein, The fixed block (11) is provided with a detection hole; the positioning assembly further comprises a first sensor (16) penetrating through the detection hole to detect the first part.

4. A displacement device, characterized in that Comprising: a positioning assembly (1) according to any one of claims 1 to 3; an X-axis moving mechanism (2) connected with the positioning assembly (1) to drive the positioning assembly (1) to move in an X-axis direction; and an Y-axis moving mechanism (3) connected with the positioning assembly (1) to drive the positioning assembly (1) to move in a Y-axis direction. A Y-axis moving mechanism (3) is connected with the X-axis moving mechanism (2) to drive the positioning assembly (1) to move in the Y-axis direction.

5. The shifting device according to claim 4, characterized in that, The Y-axis moving mechanism (3) comprises a fixed frame (31), a driving motor (32), a lead screw (33) and a first moving plate (34), the driving motor (32) is arranged on the fixed frame (31), the lead screw (33) is rotatably arranged on the fixed frame (31), the driving motor (32) is connected with the lead screw (33) to drive the lead screw (33) to rotate, the first moving plate (34) is slidably arranged on the fixed frame (31) in the Y-axis direction, the first moving plate (34) is drivingly connected with the lead screw (33), and the X-axis moving mechanism (2) is arranged on the first moving plate (34); The X-axis moving mechanism (2) comprises an electric cylinder (21) and a second moving plate (22), the electric cylinder (21) is arranged on the first moving plate (34), the second moving plate (22) is slidably arranged on the first moving plate (34) in the X-axis direction, and the electric cylinder (21) is connected with the second moving plate (22), and the positioning assembly is arranged on the second moving plate (22).

6. An automatic screwing apparatus characterized by comprising: The shifting device according to any one of claims 4 to 5.

7. The automatic screw- tightening apparatus according to claim 6, characterized in that, Further comprising a laser displacement sensor (4), the laser displacement sensor (4) is fixedly arranged, and the laser displacement sensor (4) is used for detecting the height of the screw on the second part.

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