Floating screw anti-torque device

Abstract

The floating screw anti-torque device comprises a base, on which a lifting mechanism, a locking mechanism and an anti-torque mechanism are installed; the anti-torque mechanism comprises a lifting guide cylinder, a lifting shaft and an anti-torque sleeve; the lifting shaft is installed in the lifting guide cylinder, and the anti-torque sleeve is installed on the upper end of the lifting shaft extending out of the lifting guide cylinder; the side wall of the lifting guide cylinder is provided with a vertical guide slot on the lifting mechanism side; the lifting mechanism comprises a lifting cylinder, a cylinder connector and a lifting connecting plate; the cylinder connector is fixedly installed on the piston rod of the lifting cylinder, and the lifting connecting plate is fixedly connected to the lifting shaft through a guide key, and the guide key is arranged in the guide slot; the lifting shaft can drive the guide key and the lifting connecting plate to rotate; the locking mechanism is used to limit and fix the lifting shaft when the anti-torque sleeve is moved up and inserted into the nut; when the nut is tightened, the locking mechanism is reset, and the lifting shaft can move up and down in the lifting guide cylinder. The present invention can better release the extrusion force of the anti-torque sleeve and the nut.

Description

Technical Field

[0001] The invention belongs to the field of mechanical technology and relates to the structural improvement of an assembly tool, in particular to a floating screw counter-torque device. Background Art

[0002] When tightening screws, bolts or nuts, torque is applied to the screw head, the nut will slip and rotate with the screw head, making it impossible to tighten. Therefore, it is necessary to equip the nut end with an anti-torque device to fix the nut and prevent it from rotating. The screw head can rotate to tighten the screw or nut, thereby playing the role of tightening the components.

[0003] When assembling a set of screws automatically, the screw torque is usually applied gradually to the final torque in several stages rather than applying the torque to the maximum at one time. This will result in the inner wall of the counter-torque sleeve and the outer wall of the nut being tightly squeezed to generate a large pressure after tightening a screw, making it difficult to withdraw the counter-torque sleeve; after using a large pulling force to pull the counter-torque sleeve out, the squeezing force between the counter-torque sleeve and the nut is released, causing slight deformation on the inner and outer walls of both, causing the counter-torque sleeve pattern to be misaligned with the nut pattern, and the counter-torque sleeve cannot be inserted into the nut again. Summary of the invention

[0004] The purpose of the present invention is to provide a floating screw anti-torque device, which is used to solve the problem that the anti-torque sleeve wall and the nut wall are tightly squeezed to generate a large pressure, resulting in the misalignment of the inner wall pattern of the anti-torque sleeve and the outer wall pattern of the nut and cannot be inserted again.

[0005] In order to achieve the purpose of the present invention, the following technical solutions are adopted:

[0006] The floating screw anti-torque device comprises a base, on which a lifting mechanism, a locking mechanism and an anti-torque mechanism are installed, and the anti-torque mechanism and the locking mechanism are respectively arranged on the side of the lifting mechanism;

[0007] The anti-torque mechanism comprises a lifting guide cylinder, a lifting shaft and an anti-torque sleeve; the lifting shaft is installed in the lifting guide cylinder, and the anti-torque sleeve is installed at the upper end of the lifting shaft extending out of the lifting guide cylinder; the side wall of the lifting guide cylinder is provided with a vertical guide slot on the lifting mechanism side;

[0008] The lifting mechanism comprises a lifting cylinder, a cylinder connecting piece and a lifting connecting plate; the cylinder connecting piece is fixedly installed on the piston rod of the lifting cylinder, the lifting connecting plate is fixedly connected to the lifting shaft through a guide key, and the guide key is arranged in the guide slot; the lifting shaft can drive the guide key and the lifting connecting plate to rotate;

[0009] The locking mechanism is used to limit and fix the lifting shaft when the anti-torque sleeve is moved up and inserted into the nut; when the nut is tightened, the locking mechanism is reset, and the lifting shaft can move up and down in the lifting guide cylinder.

[0010] In order to further achieve the purpose of the present invention, the following technical solutions can also be adopted:

[0011] The floating screw anti-torque device as described above, the locking mechanism includes a locking cylinder, a fixed block, a locking slider and a ejector; the fixed block is installed on the outside of the lifting guide cylinder; a vertical slide groove is opened on the fixed block, the locking slider is arranged in the vertical slide groove, and the upper part of the piston rod of the locking cylinder is fixedly connected to the locking slider; corresponding locking holes are opened on the fixed block and the lifting guide cylinder, an ejector is arranged in the locking hole, and a spring is installed on the ejector; the locking cylinder can drive the locking slider to move upward, and the locking slider pushes the outer end of the ejector to extend into the lifting guide cylinder and contact and fix with the lifting shaft; when the locking cylinder drives the locking slider to move downward, the spring can push the outer end of the ejector to separate from the lifting shaft and retract.

[0012] In the floating screw anti-torque device as described above, the lifting connecting plate is a holder structure, including an upper connecting plate, a lower connecting plate and a short shaft installed therebetween.

[0013] As described above, the floating screw anti-torque device, the lifting connecting plate includes a horizontal plate and a vertical plate, one end of the horizontal plate has an arc groove matching the short axis, the other end of the horizontal plate is fixedly connected to the upper part of the vertical plate, and the lower part of the vertical plate is fixedly connected to the lifting shaft through a guide key.

[0014] In the floating screw anti-torque device as described above, the width of the guide slot is 1.2-1.6 times the width of the guide key, and the guide key can rotate in the guide slot at an angle of 0-10°.

[0015] In the floating screw anti-torque device as described above, the vertical sliding groove and the locking sliding groove are both rectangular holes.

[0016] As described above, in the floating screw anti-torque device, the inner end of the ejector pin and the upper portion of the locking slide block are provided with matching sliding inclined surfaces.

[0017] In the floating screw anti-torque device as described above, a vertical V-shaped groove is formed on the outer periphery of the lifting shaft, and a V-shaped portion matching the V-shaped groove is formed at the outer end of the ejector pin.

[0018] Compared with the prior art, the advantages of the present invention are:

[0019] 1. The present invention can overcome the torque when the counter-torque device tightens the screw nut, ensuring that the nut will not slide relative to the nut when tightening, and meeting the use requirements of the automated production line. The lifting shaft can be positioned by the locking mechanism, thereby ensuring that the nut is fixed when tightening the screw.

[0020] 2. The present invention overcomes the problem that the counter-torque sleeve is squeezed by the nut during the step-by-step tightening process and is difficult to pull out. The lifting shaft drives the counter-torque sleeve to rotate slightly, which can better release the squeezing force between the counter-torque sleeve and the nut, making it easier to pull out the counter-torque sleeve.

[0021] 3. The present invention solves the problem that after the anti-torque sleeve is pulled out, the inner wall pattern of the anti-torque sleeve and the outer wall pattern of the nut are misaligned, and the anti-torque sleeve cannot be inserted into the nut again. By releasing the squeezing force between the anti-torque sleeve and the nut in advance, the inner wall patterns and outer wall patterns of the two will not be damaged when the anti-torque sleeve is pulled out. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art.

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 yes Figure 1 An assembly diagram of the driving mechanism described in the figure;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of the lifting guide cylinder described in;

[0026] Figure 4 yes Figure 1 A structural diagram of the guide key and guide slot described in;

[0027] Figure 5 yes Figure 1 Schematic diagram of the internal structure.

[0028] Figure markings: 1-base, 2-lifting cylinder, 3-cylinder connecting part, 4-lifting connecting plate, 5-anti-torque sleeve, 6-lifting shaft, 61-mounting hole, 62-V-groove, 7-lifting guide cylinder, 71-axis hole, 72-guide slide groove, 73-locking slide groove, 74-connecting part, 8-fixing block, 9-locking cylinder, 10-thimble, 11-spring, 12-locking slider, 13-guide key, 14-nut. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0031] like Figure 1-Figure 5 As shown, a floating screw anti-torque device disclosed in this embodiment includes a base 1, on which a lifting mechanism, a locking mechanism and an anti-torque mechanism are installed. The anti-torque mechanism and the locking mechanism are respectively arranged on the side of the lifting mechanism.

[0032] The base 1 is a bottom plate, which is made of a plate, and bolt holes for installing a lifting mechanism, a locking mechanism and a counter-torque mechanism are pre-opened on the bottom plate. At the same time, in order to make the structure of the device more compact, such as Figure 1 As shown, the lifting mechanism is arranged on the left side of the counter-torque mechanism, and the locking mechanism is arranged on the front side of the torque generating mechanism.

[0033] like Figure 2 , Figure 3 As shown, the anti-torque mechanism of this embodiment includes a lifting guide cylinder 7, a lifting shaft 6 and a anti-torque sleeve 5; the lifting shaft 6 is installed in the lifting guide cylinder 7, and the lifting shaft 6 extends out of the upper end of the lifting guide cylinder 7 to install the anti-torque sleeve 5; the side wall of the lifting guide cylinder 7 is opened with a vertical guide groove 72 on the lifting mechanism side.

[0034] A connecting portion 74 is provided at the bottom of the lifting guide cylinder 7, and the connecting portion 74 cooperates with the connecting hole opened on the bottom plate 1; an axial hole 71 cooperating with the lifting shaft 6 is provided in the middle of the lifting guide cylinder 7, and the lifting shaft 6 can be lifted and lowered in the axial hole 71 to drive the anti-torque cylinder to rise and fix the nut 14 or to fall and be pulled out.

[0035] The anti-torque sleeve 5 is a standard part, and its opening upwards is adapted to the nut 14. The anti-torque sleeve 5 and the lifting shaft 6 are detachably connected through internal threaded holes and screws, which is convenient for replacement and maintenance.

[0036] Continue to see Figure 1 As shown, the lifting mechanism includes a lifting cylinder 2, a cylinder connecting part 3 and a lifting connecting plate 4; the cylinder connecting part 3 is fixedly installed on the piston rod of the lifting cylinder 2, and the lifting connecting plate 4 is fixedly connected to the lifting shaft 6 through a guide key 13, and the guide key 13 is set in the guide groove 72; the lifting shaft 6 can drive the guide key 13 and the lifting connecting plate 4 to rotate.

[0037] like Figure 2 As shown, the lifting connecting plate 4 of this embodiment is a card seat structure, including an upper connecting plate, a lower connecting plate and a short shaft installed therebetween. The lifting connecting plate 4 is composed of a horizontal plate and a vertical plate, one end of the horizontal plate has an arc groove matched with the short shaft, the other end of the horizontal plate is fixedly connected to the upper part of the vertical plate, and the lower part of the vertical plate is fixedly connected to the lifting shaft 6 through a guide key 13.

[0038] The guide key 13 passes through the guide slot 72 provided on the side wall of the lifting guide cylinder 7, one end of the guide key 13 is fixedly connected to the lifting shaft 6 through the mounting hole 61, and the other end of the guide key 13 is fixedly connected to the lower part of the vertical plate. Driven by the lifting cylinder 2, the guide key 13 can slide up and down in the guide slot 72.

[0039] like Figure 2 , Figure 3 and Figure 4 As shown, since the width of the guide key 13 is smaller than the guide slot 72 , the lifting shaft 6 can drive the guide key 13 to slightly rotate in the guide slot 72 .

[0040] In this embodiment, the width of the guide slot 72 is 1.2-1.6 times, preferably 1.3-1.5 times, of the width of the guide key 13 to ensure stable lifting and lowering while having good rotation adjustment performance. When the guide key 13 contacts the side wall of the guide slot 72, it is blocked and cannot continue to rotate.

[0041] The guide key 13 can rotate in the guide slot 72 at an angle of 0-6° to achieve fine rotation adjustment of the anti-torque sleeve 5. When the lifting shaft 6 rotates to drive the guide key 13 and the lifting connecting plate 4 to rotate together, the arc groove set on the horizontal plate cooperates with the short shaft to achieve the simultaneous rotation of the lifting connecting plate 4, while the lifting cylinder 2 and the cylinder connecting member 3 are fixed. At the same time, the lifting connecting plate 4 will not hit the cylinder connecting member 3 when rotating, avoiding the lifting cylinder 2 and the like from being damaged by lateral force.

[0042] The locking mechanism in this embodiment is used to limit and fix the lifting shaft 6 when the anti-torque sleeve 5 is moved up and inserted into the nut 14; when the nut 14 is tightened, the locking mechanism is reset, and the lifting cylinder 2 drives the lifting shaft 6 to move up and down and separate in the lifting guide cylinder 7 through the cylinder connecting piece 3, the lifting connecting plate 4, and the guide key 13.

[0043] like Figure 1 , Figure 5As shown, the locking mechanism includes a locking cylinder 9, a fixed block 8, a locking slider 12 and an ejector pin 10; the fixed block 8 is installed on the outside of the lifting guide cylinder 7; a vertical slide groove is opened on the fixed block 8, and the locking slider 12 is arranged in the vertical slide groove, and the upper part of the piston rod of the locking cylinder 9 is fixedly connected with the locking slider 12; corresponding locking holes are opened on the fixed block 8 and the lifting guide cylinder 7, and an ejector pin 10 is arranged in the locking hole, and a spring 11 is installed on the ejector pin 10; the locking cylinder 9 can drive the locking slider 12 to move upward, and the locking slider 12 pushes the outer end of the ejector pin 10 to extend into the lifting guide cylinder 7 and contact and fix with the lifting shaft 6; when the locking cylinder 9 drives the locking slider 12 to move downward, the spring 11 can push the outer end of the ejector pin 10 to separate from the lifting shaft 6 and retract.

[0044] The lifting guide cylinder 7 is provided with a locking groove 73 on the front side, and a corresponding locking groove 73 is also provided on the fixed block 8, which serves as a moving slideway for the ejector pin 10 in the lifting guide cylinder 7 and the fixed block 8. The fixed block 8 is provided with a vertical groove, and both the vertical groove and the locking groove 73 are rectangular holes.

[0045] The inner end of the ejector pin 10 is provided with a matching sliding inclined surface on the upper part of the locking slide block 12. A vertical V-shaped groove 62 is opened on the outer periphery of the lifting shaft 6, and a V-shaped portion matching with the V-shaped groove 62 is provided on the outer end of the ejector pin 10.

[0046] When the locking cylinder 9 rises, it drives the locking slider 12 upward, and the locking slider 12 pushes the ejector 10 to move into the lifting guide cylinder 7. The V-shaped portion at the outer end of the ejector 10 cooperates with the V-shaped groove 62 on the outer periphery of the lifting shaft 6. At this time, the spring 11 is compressed, and the lifting shaft 6 is tightened and cannot rotate; when the locking cylinder 9 descends, it drives the locking slider 12 downward, and the spring 11 pushes the ejector 10 to retract. The ejector 10 leaves the V-shaped groove 62 and separates from the lifting shaft 6. At this time, the lifting shaft 6 can be lifted and rotated.

[0047] When the present invention is working, the piston rod of the lifting cylinder 2 extends, driving the cylinder connecting part 3, the lifting connecting plate 4, the guide key 13, the lifting shaft 6, the anti-torque sleeve 5, etc. to rise together. Since the ejector pin 10 is not extended, the lifting shaft 6 and the anti-torque sleeve 5 can rotate at a small angle in the circumferential direction of the lifting guide cylinder 7.

[0048] When the counter-torque sleeve 5 is inserted into the nut 14, the piston rod of the locking cylinder 9 extends out, driving the locking slider 12 to rise; the locking slider 12 pushes the V-shaped portion of the outer end of the ejector pin 10 to extend into the V-shaped groove 62, so that the lifting shaft 6 is positioned and cannot rotate, and the counter-torque sleeve 5 is also fixed; the nut 14 cannot rotate in the counter-torque sleeve 5, which can play an anti-torque role; use an electric torque wrench to apply torque to the screw head and tighten the screw. At this time, the nut 14 and the inner wall of the counter-torque sleeve 5 are tightly squeezed together, making it difficult to withdraw the counter-torque sleeve 5. Then, the piston rod of the locking cylinder 9 retracts, driving the locking slider 12 to descend, and the spring 11 releases the thrust, pushing the ejector pin 10 to retract backward and separate from the lifting shaft 6; at this time, the anti-torque sleeve 5 will rotate a little at a small angle away from the nut 14, and the pressure between the nut 14 and the anti-torque sleeve 5 will be released. The inner wall of the anti-torque sleeve and the nut 14 are no longer squeezed together, and the lifting shaft 6 and the anti-torque sleeve 5 resume the rotatable state, and the piston rod of the lifting cylinder 2 retracts, driving the cylinder connecting part 3, the lifting connecting plate 4, the guide key 13, the lifting shaft 6, the anti-torque sleeve 5, etc. to move downward together.

[0049] When the device works next time, since there is no squeezing force between the previous counter-torque sleeve 5 and the nut 14, the patterns on the inner wall of the counter-torque sleeve 5 and the outer wall of the nut 14 are not misaligned, the counter-torque sleeve 5 can be easily aligned with the patterns and put on to continue the next tightening operation of the screw or bolt and the nut 14.

[0050] The technical contents not described in detail in the present invention are all known technologies.

Claims

1. A floating screw anti-torque device, comprising a base, characterized in that: The base is provided with a lifting mechanism, a locking mechanism and a counter-torque mechanism, and the counter-torque mechanism and the locking mechanism are respectively arranged on the side of the lifting mechanism; The anti-torque mechanism comprises a lifting guide cylinder, a lifting shaft and an anti-torque sleeve; the lifting shaft is installed in the lifting guide cylinder, and the anti-torque sleeve is installed at the upper end of the lifting shaft extending out of the lifting guide cylinder; the side wall of the lifting guide cylinder is provided with a vertical guide slot on the lifting mechanism side; The lifting mechanism comprises a lifting cylinder, a cylinder connecting piece and a lifting connecting plate; the cylinder connecting piece is fixedly installed on the piston rod of the lifting cylinder, and the cylinder connecting piece is fixedly connected to the lifting shaft through a guide key, and the guide key is arranged in the guide slot; the lifting shaft can drive the guide key and the lifting connecting plate to rotate; The locking mechanism is used to limit and fix the lifting shaft when the anti-torque sleeve is moved up and inserted into the nut; when the nut is tightened, the locking mechanism is reset, and the lifting shaft can move up and down in the lifting guide cylinder; The locking mechanism comprises a locking cylinder, a fixing block, a locking slider and an ejector pin; the fixing block is mounted on the outer side of the lifting guide cylinder; a vertical slide groove is formed on the fixing block, the locking slider is arranged in the vertical slide groove, and the upper part of the piston rod of the locking cylinder is fixedly connected to the locking slider; corresponding locking holes are formed on the fixing block and the lifting guide cylinder, an ejector pin is arranged in the locking hole, and a spring is installed on the ejector pin; the locking cylinder can drive the locking slider to move upward, and the locking slider pushes the outer end of the ejector pin to extend into the lifting guide cylinder and contact and fix with the lifting shaft; when the locking cylinder drives the locking slider to move downward, the spring can push the outer end of the ejector pin to separate from the lifting shaft and retract; The cylinder connecting piece is a card seat structure, including an upper connecting plate, a lower connecting plate and a short shaft installed therebetween.

2. The floating screw anti-torque device according to claim 1, characterized in that: The lifting connection plate includes a horizontal plate and a vertical plate. One end of the horizontal plate has an arc groove that matches the short shaft. The other end of the horizontal plate is fixedly connected to the upper part of the vertical plate. The lower part of the vertical plate is fixedly connected to the lifting shaft through a guide key.

3. The floating screw anti-torque device according to claim 1, characterized in that: The width of the guide slot is 1.2-1.6 times the width of the guide key, and the guide key can rotate in the guide slot at an angle of 0-10°.

4. The floating screw anti-torque device according to claim 1, characterized in that: The vertical sliding groove and the locking sliding groove are both rectangular holes.

5. The floating screw anti-torque device according to claim 1, characterized in that: The inner end of the ejector pin and the upper part of the locking slide block are provided with matching sliding inclined surfaces.

6. The floating screw anti-torque device according to claim 1, characterized in that: A vertical V-shaped groove is opened on the outer periphery of the lifting shaft, and a V-shaped portion matching with the V-shaped groove is arranged at the outer end of the ejector pin.

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