Self-adaptive single-shaft screw tightening machine

Abstract

The utility model discloses a self-adaptive single-shaft screw tightening machine which comprises a base, a vertical locking support and a positioning assembly used for fixing and limiting a product are fixedly arranged on the base, a locking mounting plate is fixedly arranged on the locking support, and an air cylinder mounting plate extending forwards is fixedly arranged at the upper end of the locking mounting plate. A vertically-mounted telescopic air cylinder part is fixedly arranged on the air cylinder mounting plate, a vertical locking guide rail is fixedly arranged on the front end face of the locking mounting plate, a first sliding block and a second sliding block are sequentially arranged on the locking guide rail in a sliding mode from top to bottom, and a first sensor assembly and a second sensor assembly are flush with the lower end of the bit part. The screw screwing depth can be monitored in real time, screwing at different stages can be carried out according to different screwing depths, the torque for screwing the screw can be more accurately controlled, a product can be better protected, meanwhile, it can be ensured that each screwing operation reaches the ideal depth, and therefore the consistency and reliability of assembly are improved.

Description

Technical Field

[0001] This utility model relates to the field of screw tightening machine technology, specifically an adaptive single-axis screw tightening machine. Background Technology

[0002] As described in the published patent CN204725111U, "A Digital Intelligent Servo Tightening Device," screw tightening currently generally requires manual operation, which is labor-intensive and unsafe. Although some mechanical tightening devices have appeared on the market, high-precision electronic equipment and devices require precise tightening, necessitating precise control of the tightening torque and tightening depth. Ordinary tightening devices generate dust, static electricity, and noise during the tightening process, and also produce impact and vibration, which can affect product quality. A tightening device is needed that can precisely control the screw tightening force and monitor the entire tightening process through force feedback to ensure tightening quality, suitable for high-precision and high-quality tightening applications.

[0003] In summary, the existing technology has shortcomings in controlling the torque and tightening depth of screws. Utility Model Content

[0004] To overcome the shortcomings mentioned above, this utility model aims to provide a technical solution that can solve the above problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An adaptive single-axis screw tightening machine includes a base, on which a vertical locking bracket and a positioning component for fixing and limiting the product are fixedly mounted. A locking mounting plate is fixedly mounted on the locking bracket, and a forward-extending cylinder mounting plate is fixedly mounted at the upper end of the locking mounting plate. A vertically mounted telescopic cylinder component is fixedly mounted on the cylinder mounting plate.

[0007] A vertical locking guide rail is fixed on the front end face of the locking mounting plate. A first slider and a second slider are slidably arranged on the locking guide rail from top to bottom. A first mounting plate is fixed on the first slider. A servo motor component is mounted on the first mounting plate. A cylinder connecting plate extending to the side is formed on one side of the first mounting plate. The cylinder connecting plate is fixedly connected to the working shaft of the telescopic cylinder component.

[0008] A vertical second mounting plate is fixedly mounted on the front end face of the second slider. The upper end of the second mounting plate is fixedly connected to the first mounting plate. A horizontally arranged third mounting plate is fixedly mounted on the lower end of the second mounting plate. A through first guide hole is opened on the third mounting plate. A bit piece extending downward from the first guide hole is fixedly mounted on the working shaft of the servo motor. A downwardly extending guide piece is fixedly mounted on the lower end face of the third mounting plate. A second guide hole communicating with the first guide hole is opened in the guide piece. A first abutment piece is installed in the second guide hole. A limiting piece that abuts and cooperates with the upper end face of the third mounting plate is fixedly mounted on the upper end face of the first abutment piece. A second abutment piece sleeved on the first abutment piece is provided at the lower end of the guide piece. The second abutment piece is elastically connected to the lower end face of the guide piece. A first sensor assembly is provided at the lower end of the first abutment piece. A second sensor assembly is provided at the lower end of the second abutment piece. The lower ends of the first sensor assembly, the second sensor assembly, and the bit piece are flush.

[0009] As a further embodiment of this utility model: the upper end face of the third mounting plate is provided with an annular limiting groove, the limiting member includes a limiting ring disposed in the annular limiting groove, and the first abutting member includes a first abutting pipe fixedly connected to the limiting ring.

[0010] As a further embodiment of this utility model: an annular mounting groove is provided on the inner bottom surface of the annular limiting groove, and a first spring member is installed in the annular mounting groove. The upper end of the first spring member is fixedly connected to the limiting ring, and the lower end of the first spring member is fixedly connected to the inner bottom surface of the annular mounting groove.

[0011] As a further embodiment of this utility model: the second abutting member includes a second abutting tube sleeved on the outer wall of the first abutting tube, a second spring member sleeved on the outer wall of the first abutting tube, the upper end of the second spring member being fixedly connected to the lower end face of the guide member, and the lower end of the second spring member being fixedly connected to the second abutting tube.

[0012] As a further embodiment of this utility model: the second sensor assembly includes a second rubber ring fixed to the lower end of the second abutment tube. The lower end face of the second rubber ring is evenly provided with a plurality of sensor mounting holes along the circumferential direction, and pressure sensor components are respectively installed in the plurality of sensor mounting holes.

[0013] As a further embodiment of the present invention: the first sensor assembly includes a first rubber ring fixed to the lower end of the first abutment tube, and the outer wall of the first rubber ring is evenly provided with a plurality of sensor mounting slots along the circumferential direction, and sensor probes are respectively installed in the plurality of sensor mounting slots.

[0014] As a further embodiment of this utility model: the positioning component includes a positioning mounting plate fixed on the base, a limiting plate and a limiting bracket fixed on the upper end surface of the positioning mounting plate, a vertical first limiting groove opened on the limiting plate, a limiting step opened at the upper end of the first limiting groove, an infrared sensor probe installed at the lower end of the first limiting groove, a horizontally arranged limiting cylinder fixed on the limiting bracket, a limiting clamping block fixed on the working shaft of the limiting cylinder, a circular limiting protrusion formed at the end of the limiting clamping block, and the limiting protrusion and the limiting plate cooperating with each other to clamp and fix the product.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] The application of servo motor components allows for precise control of torque during screw tightening, which not only improves the quality of screw connections but also reduces product quality issues caused by over-tightening or under-tightening.

[0017] By designing the first and second sensor components flush with the lower end of the screwdriver bit, the screw depth can be monitored in real time. Different stages of tightening can be performed according to different depths, allowing for more precise control of the screw tightening torque, better protecting the product, and ensuring that each tightening operation reaches the ideal depth, thereby improving assembly consistency and reliability. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural view of the present invention;

[0019] Figure 2 This is a left view of the present invention;

[0020] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0021] Figure 4 yes Figure 3 A partial view at point B in the middle;

[0022] Figure 5 This is another three-dimensional view of the structure of this utility model;

[0023] Figure 6 yes Figure 5 A partial view at point C;

[0024] Figure 7 This is another three-dimensional view of the structure of this utility model;

[0025] Figure 8 This is a three-dimensional schematic diagram of the screw tightening process in one embodiment of this utility model;

[0026] Figure 9This is a top view of the screw tightening process in one embodiment of this utility model;

[0027] The reference numerals and names in the figure are as follows:

[0028] Base-100, Locking bracket-101, Positioning assembly-102, Locking mounting plate-103, Cylinder mounting plate-104, Telescopic cylinder component-105, Locking guide rail-106, First slider-107, Second slider-108, First mounting plate-109, Servo motor component-110, Cylinder connecting plate-111, Second mounting plate-113, Third mounting plate-114, First guide hole-115, Screwdriver bit component-116, Guide component-117, Second guide hole-118, First abutment component-119, Limiting component-120, Second abutment component-121, First sensor assembly-122. Second sensor assembly - 123, annular limiting groove - 124, limiting ring - 125, first abutment tube - 126, annular mounting groove - 127, first spring component - 128, second abutment tube - 129, second spring component - 130, second rubber ring - 131, pressure sensor component - 132, first rubber ring - 133, sensor probe component - 134, positioning mounting plate - 135, limiting upright plate - 136, limiting bracket - 137, first limiting groove - 138, limiting step - 139, infrared sensor probe - 140, limiting cylinder - 141, limiting clamp - 142, limiting protrusion - 143. Detailed Implementation

[0029] 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.

[0030] Please see Figure 1-9 An adaptive single-axis screw tightening machine includes a base 100, on which a vertical locking bracket 101 and a positioning component 102 for fixing and limiting the product are fixedly mounted. A locking mounting plate 103 is fixedly mounted on the locking bracket 101, and a forward-extending cylinder mounting plate 104 is fixedly mounted at the upper end of the locking mounting plate 103. A vertically mounted telescopic cylinder component 105 is fixedly mounted on the cylinder mounting plate 104.

[0031] A vertical locking guide rail 106 is fixedly provided on the front end face of the locking mounting plate 103. A first slider 107 and a second slider 108 are slidably arranged on the locking guide rail 106 from top to bottom. A first mounting plate 109 is fixedly provided on the first slider 107. A servo motor component 110 is mounted on the first mounting plate 109. A cylinder connecting plate 111 extending to the side is formed on one side of the first mounting plate 109. The cylinder connecting plate 111 is fixedly connected to the working shaft of the telescopic cylinder component 105.

[0032] A vertical second mounting plate 113 is fixedly mounted on the front end face of the second slider 108. The upper end of the second mounting plate 113 is fixedly connected to the first mounting plate 109. A horizontally arranged third mounting plate 114 is fixedly mounted on the lower end of the second mounting plate 113. A through first guide hole 115 is opened on the third mounting plate 114. A bit 116 extending downward from the first guide hole 115 is fixedly mounted on the working shaft of the servo motor component 110. A downwardly extending guide 117 is fixedly mounted on the lower end face of the third mounting plate 114. A guide 117 is opened inside the guide 117 to connect with the first guide hole 115. The second guide hole 118 is connected to the hole 115. The second guide hole 118 is equipped with a first abutment 119. The upper end of the first abutment 119 is fixed with a limiting member 120 that abuts against the upper end surface of the third mounting plate 114. The lower end of the guide member 117 is provided with a second abutment 121 sleeved on the first abutment 119. The second abutment 121 is elastically connected to the lower end surface of the guide member 117. The lower end of the first abutment 119 is provided with a first sensor assembly 122. The lower end of the second abutment 121 is provided with a second sensor assembly 123. The lower ends of the first sensor assembly 122, the second sensor assembly 123 and the bit 116 are flush.

[0033] It should be noted that the coordinated operation of the first sensor assembly 122, the second sensor assembly 123, the telescopic cylinder component 105, and the servo motor component 110 is carried out through a unified control system. The control system is a common technology in the prior art and will not be described in detail here.

[0034] like Figure 1 As shown, during use, the first mounting plate 109 and the second mounting plate 113 are first moved up and down on the locking guide rail 106 by the telescopic cylinder 105. During the up and down adjustment of the first mounting plate 109 and the second mounting plate 113, the servo motor 110 and the bit 116 are moved up and down. During the screw tightening process, the screw is first placed into the screw hole on the product by the previous process (the previous station on the production line) or by manual feeding. The product with the screw is fixed and limited on the positioning component 102.

[0035] The telescopic cylinder 105 drives the first abutment 119, the second abutment 121, and the bit 116 to move downwards. During the downward movement of the first abutment 119, the second abutment 121, and the bit 116, as... Figure 8 As shown, firstly, the bit 116 abuts against the screw and performs a tightening operation. Driven by the servo motor 110, the bit 116 tightens the screw into the product in the first stage. The first abutment 119, the second abutment 121, and the bit 116 continue to move downwards until the second sensor assembly 123 at the lower end of the second abutment 121 abuts against the outer edge region b of the screw hole. After the second sensor assembly 123 abuts against the outer edge of the screw hole, it indicates that the screw head has now been locked into the screw hole. At this point, driven by the servo motor 110, the bit 116 tightens the screw into the product in the second stage. The second stage of tightening is slower than the first stage to avoid damaging the product. When the second stage of tightening reaches a certain depth, the first sensor assembly 122 at the lower end of the first abutment 119 abuts against the bottom surface area a inside the screw hole. After the first sensor assembly 122 abuts against the bottom surface inside the screw hole, it indicates that the screw has been tightened to the target depth. At this time, the bit 116 stops the tightening operation under the action of the servo motor 110. Then, the telescopic cylinder 105 drives the first abutment 119, the second abutment 121 and the bit 116 to reset, and the tightening operation of another screw hole or the next product is carried out.

[0036] The application of servo motor component 110 enables precise control of torque during screw tightening, which not only improves the quality of screw connection but also reduces product quality problems caused by over-tightening or under-tightening.

[0037] By designing the first sensor assembly 122 and the second sensor assembly 123 flush with the lower end of the screwdriver bit 116, the screw depth can be monitored in real time. Different stages of tightening can be performed according to different screw depths, allowing for more precise control of the screw tightening torque, better protection of the product, and ensuring that each tightening operation reaches the ideal depth, thereby improving the consistency and reliability of assembly.

[0038] In this embodiment of the present invention, the upper end face of the third mounting plate 114 is provided with an annular limiting groove 124, the limiting member 120 includes a limiting ring 125 disposed in the annular limiting groove 124, and the first abutting member 119 includes a first abutting tube 126 fixedly connected to the limiting ring 125.

[0039] The design of the annular limiting groove 124 and the limiting ring 125 allows the first abutting tube 126 to move up and down within the specified track, limiting the possibility of its lateral displacement, enhancing the stability of the entire screw tightening process, and helping to improve the accuracy and consistency of screw tightening.

[0040] Since the limiting ring 125 is fixed in the annular limiting groove 124, the vertical movement of the first abutting tube 126 can be more precise, thereby ensuring that the pressure applied by the bit 116 to the screw is evenly distributed, and further improving the control accuracy of the screw tightening torque and depth.

[0041] The fit between the limiting ring 125 and the annular limiting groove 124 can effectively disperse the force and reduce wear caused by direct friction.

[0042] The installation process of the limiting component 120 and the first abutment tube 126 is simplified, and it is also convenient for later debugging and maintenance. The design of the limiting ring 125 and the annular limiting groove 124 makes the adjustment more intuitive and easier to operate, thus improving work efficiency.

[0043] In this embodiment of the present invention, an annular mounting groove 127 is provided on the inner bottom surface of the annular limiting groove 124, and a first spring member 128 is installed in the annular mounting groove 127. The upper end of the first spring member 128 is fixedly connected to the limiting ring 125, and the lower end of the first spring member 128 is fixedly connected to the inner bottom surface of the annular mounting groove 127.

[0044] The first spring member 128 is capable of elastic deformation when the limiting ring 125 is pushed upward, thereby providing an elastic connection between the limiting ring 125 and the first abutment tube 126 connected thereto.

[0045] Because the first spring 128 has elastic restoring force, the component at the lower end of the first abutment tube 126 can float slightly after contacting the workpiece, thus avoiding damage to the first sensor caused by the rigid contact between the first sensor component 122 and the bottom surface of the screw hole.

[0046] In this embodiment of the utility model, the second abutting member 121 includes a second abutting tube 129 sleeved on the outer wall of the first abutting tube 126, and a second spring member 130 sleeved on the outer wall of the first abutting tube 126. The upper end of the second spring member 130 is fixedly connected to the lower end face of the guide member 117, and the lower end of the second spring member 130 is fixedly connected to the second abutting tube 129.

[0047] Through the action of the second spring 130, the second abutment tube 129 and the second sensor assembly 123 can elastically deform according to actual needs after contacting the workpiece, so that the bit 116 can better engage with the screw head for tightening operations, ensuring assembly quality.

[0048] Due to the elastic properties of the second spring member 130, the second abutment tube 129 and the second sensor assembly 123 can automatically adjust their position and pressure according to different workpiece surface shapes and hardness, increasing the applicability and flexibility of the equipment. It can adapt well to both smooth and irregular surfaces.

[0049] In this embodiment of the present invention, the second sensor assembly 123 includes a second rubber ring 131 fixed to the lower end of the second abutment tube 129. The lower end face of the second rubber ring 131 is uniformly provided with a plurality of sensor mounting holes along the circumferential direction, and pressure sensor components 132 are respectively installed in the plurality of sensor mounting holes.

[0050] Using the first rubber ring 133 as the carrier of the pressure sensor component 132 can not only protect the sensor from direct impact and wear, but also utilize the elastic properties of the rubber material to buffer and disperse the force, thereby improving the stability and reliability of the entire sensor assembly.

[0051] The arrangement of multiple pressure sensor components 132 can provide more detailed pressure feedback data, ensuring that after the lower end face of the second rubber ring 131 abuts against the periphery of the screw hole, the pressure sensor assembly can feed back the abutment signal to the control system in real time.

[0052] Because the sensors are distributed in a circular direction, this layout can better adapt to the periphery of screw holes of different shapes and sizes, ensuring that the equipment can maintain high-precision operation performance when processing different types of screws.

[0053] Embedding the sensor in a rubber ring not only avoids damage caused by direct contact between the sensor and the workpiece, but also reduces the impact of external environmental factors (such as dust and oil) on the sensor, thereby extending its service life and reducing maintenance costs.

[0054] In this embodiment of the present invention, the first sensor assembly 122 includes a first rubber ring 133 fixed to the lower end of the first abutment tube 126. The outer wall of the first rubber ring 133 is uniformly provided with a plurality of sensor mounting slots along the circumferential direction, and a sensor probe 134 is respectively installed in the plurality of sensor mounting slots.

[0055] The sensor probe 134 of the first sensor assembly 122 is distributed in a ring on the outer wall of the first rubber ring 133, which enables the system to better adapt to the inner bottom surface of screw holes of different shapes and sizes. Whether it is a flat or curved surface, the sensor probe 134 can effectively contact the inner bottom surface of the screw hole to ensure the accuracy of the detection data. Especially for screw holes with smaller diameters, the distance between the screw and the hole wall is closer, so the first abutment tube 126 and the first rubber ring 133 need to be made thinner, which makes it difficult for the sensor to penetrate deeply. However, the thinner sensor probe 134 can work well with the first abutment tube 126 and the first rubber ring 133 to penetrate deeply. Moreover, even if the sensor probe 134 slightly scratches the inner bottom surface of the screw hole, its position is relatively hidden, and the impact on the product appearance can be ignored.

[0056] The second rubber ring 131 not only provides a stable mounting base for the sensor probe 134, but also plays a role in buffering and protection. The rubber material can effectively absorb impact force, reduce the direct damage of the external environment to the sensor, and extend the service life of the sensor assembly.

[0057] The multi-point sensor probe 134 can monitor the pressure changes during the screw tightening process in real time and provide instant feedback to the control system. This helps the system adjust the tightening parameters according to actual needs and ensure the consistency and reliability of each operation.

[0058] Precise pressure monitoring can help avoid product defects or equipment damage caused by over-tightening or under-tightening, thus improving operational safety.

[0059] Since the sensor probe 134 is embedded in the mounting groove of the second rubber ring 131, this structural design facilitates disassembly and replacement, simplifies maintenance, and also allows for quick adjustment of the sensor layout according to different application requirements, improving the system's adjustability and maintenance efficiency.

[0060] In this embodiment of the utility model, the positioning component 102 includes a positioning mounting plate 135 fixed on the base 100. A limiting plate 136 and a limiting bracket 137 are fixed on the upper end surface of the positioning mounting plate 135. A vertical first limiting groove 138 is opened on the limiting plate 136. A limiting step 139 is opened at the upper end of the first limiting groove 138. An infrared sensor probe 140 is installed at the lower end of the first limiting groove 138. A horizontally arranged limiting cylinder 141 is fixed on the limiting bracket 137. A limiting clamp 142 is fixed on the working shaft of the limiting cylinder 141. A circular limiting protrusion 143 is formed at the end of the limiting clamp 142. The limiting protrusion 143 and the limiting plate 136 cooperate with each other to clamp and fix the product.

[0061] The design of the first limiting groove 138 and the limiting protrusion 143 on the limiting plate 136 ensures that the product can be accurately positioned in a specific location when it is clamped. The presence of the limiting step 139 further enhances this function, allowing the product to be placed more stably in the designated position.

[0062] By driving the limit clamping block 142 with the limit cylinder 141, the clamping force and position can be adjusted according to products of different sizes, making it more adaptable. This design allows for quick changes of different product types without complicated reconfiguration, improving the flexibility of the production line.

[0063] The infrared sensor probe 140 installed at the lower end of the first limiting groove 138 can monitor in real time whether there is an object in the limiting groove or whether the product is correctly placed. This not only improves the automation level of production, but also reduces problems caused by human error, such as missed processing or misaligned assembly.

[0064] The circular limiting protrusion 143 design helps to evenly distribute the clamping force, avoiding the risk of local overpressure damage to the product. In addition, the infrared sensor probe 140 can also serve as part of a safety mechanism to suspend operation when an abnormality is detected (such as a product that is not placed correctly), preventing equipment damage or production accidents.

[0065] 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. An adaptive single-axis screwdriver, characterized by, The utility model provides a product locking device, including base, and the vertical locking support and the location component for product fixed limit are fixed on the base, and the locking support is fixed with locking mounting plate, and the upper end of locking mounting plate is fixed with the cylinder mounting plate that protrudes to the front, and the vertical telescopic cylinder spare is fixed on the cylinder mounting plate; The front end surface of locking mounting plate is fixed with vertical locking guide rail, and the first sliding block and the second sliding block are sequentially and slidably arranged on the locking guide rail from top to bottom, the first sliding block is fixed with the first mounting plate, the servo motor spare is installed on the first mounting plate, the first mounting plate is formed with the cylinder connecting plate that protrudes to the side surface on one side, and the cylinder connecting plate is fixedly connected with the working shaft of telescopic cylinder spare; The front end surface of second sliding block is fixed with vertical second mounting plate, the upper end of second mounting plate is fixedly connected with first mounting plate, the lower end of second mounting plate is fixed with the third mounting plate that is arranged horizontally, the first guide hole is formed in the third mounting plate, the working shaft of servo motor spare is fixedly provided with the bit that passes down from the first guide hole, the lower end surface of third mounting plate is fixed with the guide piece that extends downward, the second guide hole that is communicated with the first guide hole is formed in the guide piece, the first abutting piece is installed in the second guide hole, the upper end of first abutting piece is fixed with the limiting piece that is in abutting cooperation with the upper end surface of third mounting plate, the lower end of guide piece is provided with the second abutting piece that is sleeved on the first abutting piece, the second abutting piece is elastically connected with the lower end surface of guide piece, the lower end of first abutting piece is provided with the first sensor assembly, the lower end of second abutting piece is provided with the second sensor assembly, and the lower end of bit is flush with the first sensor assembly, the second sensor assembly and the second abutting piece.

2. An adaptive single spindle screwdriver / tightener according to claim 1, characterized in that, The upper end surface of third mounting plate is provided with annular limiting groove, the limiting ring in annular limiting groove is included, and the first abutting pipe is fixedly connected with the limiting ring.

3. An adaptive single spindle screw tightening machine according to claim 2, wherein, The inner bottom surface of annular limiting groove is provided with annular mounting groove, the first spring piece is installed in annular mounting groove, the upper end of first spring piece is fixedly connected with limiting ring, and the lower end of first spring piece is fixedly connected with the inner bottom surface of annular mounting groove.

4. A self-adapting single spindle screw tightening machine according to any of claims 2-3, characterized in that, The second abutting pipe is sleeved on the outer wall of first abutting pipe, the second spring piece is sleeved on the outer wall of first abutting pipe, the upper end of second spring piece is fixedly connected with the lower end surface of guide piece, and the lower end of second spring piece is fixedly connected with second abutting pipe.

5. An adaptive single spindle screw tightening machine according to claim 4, wherein, The second sensor assembly includes the second rubber ring fixedly arranged on the lower end of second abutting pipe, the lower end surface of second rubber ring is uniformly provided with a plurality of sensor mounting holes in the circumferential direction, and a plurality of pressure sensor devices are respectively installed in a plurality of sensor mounting holes.

6. An adaptive single spindle screwdriver / tightener according to claim 5, characterized in that, The first sensor assembly includes the first rubber ring fixedly arranged on the lower end of first abutting pipe, the outer wall of first rubber ring is uniformly provided with a plurality of sensor mounting grooves in the circumferential direction, and a plurality of sensor probe devices are respectively installed in a plurality of sensor mounting grooves.

7. An adaptive single spindle screwdriver / tightener according to claim 5, wherein, The positioning assembly comprises a positioning mounting plate fixed on the base, the upper end surface of the positioning mounting plate is fixed with a limiting vertical plate and a limiting support, a vertical first limiting groove is formed in the limiting vertical plate, a limiting step is formed at the upper end of the first limiting groove, an infrared sensor probe is arranged at the lower end of the first limiting groove, a limiting cylinder horizontally arranged is fixed on the limiting support, a limiting clamping block is fixed on the working shaft of the limiting cylinder, a circular limiting protrusion is formed at the end of the limiting clamping block, and the limiting protrusion and the limiting vertical plate are matched to clamp and fix the product.

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