Electric wrench based on integrated protection assembly

Abstract

The invention relates to the related technical field of electric wrenches, and discloses an electric wrench based on an integrated protection assembly, which comprises a shell, a protection cylinder is mounted at one end in the shell, two fixed rings are fixedly arranged on the inner wall of the protection cylinder, and movable rings are annularly and slidably arranged on the inner walls of the two fixed rings respectively; protection assemblies are arranged on the inner walls of the two movable rings, and tightening assemblies are arranged in the protection assemblies; the six push rods can be guided through radial outer-side movement of the six balancing weights, so that the six push rods axially slide, and the six movable rods further radially move inwards through axial sliding of the six push rods. The six movable rods further radially move inwards to compress the first springs to generate elastic force, under the elastic force effect of the six first springs, the clamping and fixing effect of the six clamping blocks on the nut is gradually improved, and the clamping force of the tightening assembly on the nut can be adjusted according to the rotating speed of the tightening assembly; and the situation that the nut slips in the screwing process is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field related to electric wrenches, and more specifically, particularly relates to an electric wrench based on an integrated protection component. Background Art

[0002] An electric wrench is a wrench powered by electricity or a battery, and is a tool for tightening high-strength bolts. It is also called a high-strength bolt gun and is mainly divided into impact wrenches, torque shear wrenches, fixed-torque wrenches, angle wrenches, and angle head wrenches. An electric wrench refers to an electric tool for tightening and loosening bolts and nuts, and is a tool for tightening high-strength bolts. It is used for the initial tightening, final tightening of large hexagon head high-strength bolts in the construction of steel structure bridges, factory buildings, chemical industry, and power generation equipment installation, and the initial tightening of torque shear type high-strength bolts, as well as occasions where strict requirements are imposed on the torque or axial force of bolt fasteners. An electric wrench is a hand-held electric tool for loading and unloading threaded connectors and is widely used in the assembly work of manufacturing industries such as automobiles, tractors, electric motors and electrical appliances, power machinery, valves, water pumps, and textile machinery. However, the electric wrenches in the prior art have the following defects: In the prior art, when an electric wrench is in use, vibrations are inevitably generated, resulting in poor stability of the electric wrench. When screwing a nut, it is inconvenient to carry out a stabilizing operation, thus affecting the use of the electric wrench.

[0003] In the prior art, when an electric wrench is in use, the biting force of the socket on the nut is insufficient, and slipping is likely to occur. In severe cases, the nut will be damaged, which is usually due to an increase in the surface roughness of the bolt head, resulting in a decrease in friction.

[0004] In the prior art, when increasing the rotational speed of the socket of an electric wrench, since the biting force of the socket on the nut and the stability of the socket are usually fixed and unchanged, it is likely to result in insufficient biting force of the socket on the nut, or poor stability of the electric wrench, and it is impossible to adjust the biting force of the socket on the nut and the stability of the socket according to the rotational speed of the socket, thus affecting the use of the electric wrench.

[0005] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and an electric wrench based on an integrated protection component is provided, with the expectation of achieving a more practical and valuable purpose. Summary of the Invention

[0006] The present invention provides an electric wrench based on an integrated protection component to overcome the above defects in the prior art.

[0007] The purpose and efficacy of an electric wrench based on an integrated protection component of the present invention are achieved by the following specific technical means: An electric wrench based on an integrated protection component, comprising a housing. One end inside the housing is provided with a protection cylinder. One end outer wall of the protection cylinder is provided with an end cover. Two fixing rings are fixedly arranged on the inner wall of the protection cylinder. One movable ring is annularly slidably arranged on the inner walls of the two fixing rings respectively. A protection component is arranged on the inner walls of the two movable rings. A tightening component is arranged inside the protection component; the protection component includes a protection ring. One end inner wall of the protection ring is fixedly provided with a conical cylinder. A plurality of limiting rings are axially spaced on the inner wall of the conical cylinder; the tightening component includes a circular plate part. The outer wall of the circular plate part is in sliding contact with the inner wall of the protection ring. One side of the circular plate part is fixedly provided with an outer sleeve part. The other side of the circular plate part is fixedly provided with a connecting part. An inner sleeve part is fixedly arranged on the inner wall of the outer sleeve part. A plurality of clamping blocks are radially slidably arranged in a circumferential array on the inner wall of the inner sleeve part. One side of the clamping block is fixedly provided with a movable seat. A movable rod is slidably arranged inside the movable seat. A plurality of push rods are axially slidably arranged in the inner wall of the outer sleeve part. A first sliding plate is slidably arranged inside the circular plate part. A plurality of counterweight blocks are slidably arranged in a circumferential array on one side of the first sliding plate. A plurality of first elastic rods are obliquely arranged in a circumferential array on the outer wall of the connecting part.

[0008] Further technical solution, one end of the movable rod is in inclined sliding contact with one end of the push rod. The other end of the movable rod is connected to the inside of the movable seat by a first spring. The other end of the push rod is in inclined sliding contact with one side of the counterweight block. One end of the first elastic rod is provided with a pressing block. The pressing block slides on the conical wall of the conical cylinder. One fixing plate is fixedly arranged on each of the two sides of the first elastic rod. A rubber part is arranged on one side of the fixing plate.

[0009] Further technical solution, the inner walls of the two movable rings are fixedly connected to the outer wall of the protection ring. A plurality of bearings are arranged between the outer wall of the movable ring and the inner wall of the fixing ring. A plurality of ejector rods are slidably arranged in a circumferential array inside the connecting part. A plurality of arc-shaped grooves are arranged in a circumferential array on the outer wall of the connecting part. One side of the first elastic rod close to the connecting part is fixedly provided with a push plate. One end of the push plate slides in the arc-shaped groove. One end of the ejector rod is in contact with one end of the push plate. The other end of the ejector rod is fixedly connected to the other side of the first sliding plate. A second spring is connected between one side of the first sliding plate and one side inside the circular plate part.

[0010] Further technical solution, a plurality of first sliding grooves are arranged in a circumferential array on one side of the first sliding plate. A first slider is radially slidably arranged inside the first sliding groove. One side of the first slider is fixedly connected to the counterweight block.

[0011] Further technical solution: A number of second chutes are circumferentially arrayed on the inner wall of one end of the protective ring. A number of second sliders are fixedly arrayed on the outer wall of the circular plate portion in a circumferential manner. The second sliders slide within the second chutes. One side inside the second chutes is fixedly provided with a rubber plate, and one side of the rubber plate is in inclined contact with one side of the second sliders.

[0012] Further technical solution: A number of card slots are spaced on one inclined side of the rubber plate. A number of clamping blocks are slidably arranged inside the second sliders.

[0013] Further technical solution: A number of second sliding plates are radially slidably arranged in a circumferential array inside the circular plate portion. One end of each second sliding plate is fixedly connected to one of the clamping blocks by a second elastic rod. A third spring is connected between one side of the second sliding plate and the inner wall of the circular plate portion.

[0014] Further technical solution: The outer sleeve portion is made of 60 HRC high-hard steel, and the inner sleeve portion and the clamping block are made of copper-based shape memory alloy. Among them, 60 HRC high-hard steel refers to steel with a measured value of 60 on the Rockwell hardness (HRC) scale. Rockwell hardness is an index to measure the ability of metal materials to resist indentation deformation. The higher the value, the harder the material. The copper-based shape memory alloy expands by %-% when heated (heat generated by friction during work) and actively presses against the outer wall of the nut.

[0015] Further technical solution: One end of the connecting portion is connected to the inner end of the conical cylinder by a compression spring.

[0016] Further technical solution: One end of the conical cylinder is provided with a through hole. One end inside the connecting portion is provided with a spline groove for connecting to the output end of the drive motor inside the housing. One side in the middle of the housing is provided with a control button.

[0017] Compared with the prior art, the present invention has the following beneficial effects: An electric wrench based on an integrated protection component of the present invention, through the settings of the first elastic rod, pressing block, conical cylinder, and limiting ring, the tightening component axially slides within the protection component, and the circular plate part axially slides within the protection ring. The axial sliding of the circular plate part drives the connecting part and six first elastic rods and pressing blocks to axially move. The six pressing blocks are guided by the conical inner wall of the conical cylinder, so that the six pressing blocks gradually move radially inward. The radial inward movement of the six pressing blocks respectively causes the six first elastic rods to bend and deform, and the bending deformation of the six first elastic rods drives six pairs of fixing plates and rubber parts to move radially inward. The radial inward movement of the six pairs of rubber parts squeezes and contacts the outer wall of the connecting part, thereby improving the stability between the protection component and the tightening component. Furthermore, through the settings of the second slider, second chute, and rubber plate, the axial sliding of the circular plate part drives the six second sliders to slide, so that the six second sliders respectively axially slide within the six second chutes. By the contact of one side of the second slider with the inclined surface of one side of the rubber plate, the second slider axially slides within the second chute, gradually increasing the extrusion friction force between the second slider and the rubber plate, thereby gradually improving the stability between the protection component and the tightening component, which is beneficial to the smooth screwing of the nut. Finally, through the settings of the card slot, card block, second slide plate, and second elastic rod, the radial outward movement of the six counterweight blocks pushes the six second slide plates to move radially outward, and the radial outward movement of the second elastic rod pushes several second elastic rods and card blocks to move radially outward, so that several card blocks respectively enter several card slots, and the cooperation of the several card slots and the several card blocks is used for positioning and fixing the circular plate part on the inner wall of the protection ring, avoiding any random movement of the protection component within the tightening component, improving the stability between the tightening component and the protection component, and being beneficial to the smooth screwing of the nut.

[0018] An electric wrench based on an integrated protection component according to the present invention, through the settings of a push plate, a push rod, a first sliding plate, a push bar, a movable rod, a movable seat, and a clamping block, the radial inner sides of six pressing blocks move respectively to cause six first elastic rods to bend and deform. The bending and deformation of the six first elastic rods drive one ends of the six push plates to slide arcuately in six arc-shaped grooves respectively. The arcuate sliding of one end of the push plate in the arc-shaped groove pushes the push rod to slide axially. The axial sliding of the push rod pushes the first sliding plate to slide axially inside the circular plate portion. The axial sliding of the first sliding plate drives six push bars to slide axially. Through the inclined surface contact between one end of the push bar and one end of the movable rod, the axial sliding of the push bar guides and pushes the movable rod, so that six movable rods and movable seats move radially inwards. The radial inward movement of the six movable seats drives the six clamping blocks to move radially inwards. The radial inward movement of the six clamping blocks clamps and fixes the outer wall of the nut, which is beneficial to improving the smooth and rapid screwing action on the nut and reducing the situation of the nut slipping. Further, through the settings of the first spring and the counterweight block, the rotation of the connecting portion drives six push rods to rotate. The rotation of the six push rods drives the first sliding plate to rotate. The rotation of the first sliding plate drives six counterweight blocks to rotate. The rotation of the six counterweight blocks generates centrifugal force. Under the action of the centrifugal force, six first sliders move radially outwards in six first sliding grooves respectively. The six first sliders and counterweight blocks move radially outwards. Through the sliding contact between one end of the push bar and one side inclined surface of the counterweight block, the radial outward movement of the six counterweight blocks guides six push bars, so that six push bars slide axially. The axial sliding of the six push bars makes six movable rods move further radially inwards. The further radial inward movement of the six movable rods respectively compresses the first spring to generate elastic force. Under the elastic force of the six first springs, the clamping and fixing action of the six clamping blocks on the nut is gradually improved, which is beneficial to adjusting the clamping force of the tightening component on the nut according to the rotation speed of the tightening component and avoiding the situation of slipping during the screwing of the nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] The present invention will be further described below in conjunction with the drawings and embodiments.

[0021] Figure 1 Isometric structural schematic diagram of the present invention; Figure 2 Isometric structural schematic diagram of the protection component and the tightening component in the present invention; Figure 3 Isometric structural schematic diagram of the tightening component in the present invention; Figure 4 Isometric sectional structure diagram of the conical cylinder in the present invention; Figure 5 Isometric sectional structure diagram of the tightening assembly and the conical cylinder in the present invention; Figure 6 Front view structure diagram of the protection assembly and the tightening assembly in the present invention; Figure 7 Is Figure 6 Cross-sectional structure diagram at A-A in Figure 8 Is Figure 7 Local enlarged structure diagram at D in Figure 9 Is Figure 7 Local enlarged structure diagram at E in Figure 10 Is Figure 7 Local enlarged structure diagram at F in Figure 11 Is Figure 6 Cross-sectional structure diagram at B-B in Figure 12 Top view structure diagram of the tightening assembly in the present invention; Figure 13 Is Figure 12 Cross-sectional structure diagram at C-C in

[0022] Explanation of reference numerals: Shell 10, protection cylinder 11, end cover 12, fixing ring 13, movable ring 14, bearing 15, circular plate part 16, outer sleeve part 17, inner sleeve part 18, connecting part 19, clamping block 20, movable seat 22, movable rod 23, first spring 24, first sliding plate 25, first sliding groove 26, first sliding block 27, counterweight 28, push rod 29, ejector rod 30, arc groove 31, first elastic rod 32, pressing block 33, conical cylinder 34, limit ring 35, push plate 36, fixing plate 37, rubber part 38, compression spring 39, protection ring 40, second spring 41, spline groove 42, through hole 43, second sliding groove 44, second sliding block 45, rubber plate 46, third spring 47, card slot 48, card block 49, second elastic rod 50, control button 51, second sliding plate 52. Detailed implementation manners

[0023] The following further describes in detail the implementation manners of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0024] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0025] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] As shown in the attached Figure 1 to the attached Figure 13 figures: The present invention provides an electric wrench based on an integrated protection component.

[0027] Referring to the attached Figure 1 to the attached Figure 13 , it includes a housing 10. One end inside the housing 10 is provided with a protection cylinder 11. One end outer wall of the protection cylinder 11 is provided with an end cover 12. Two fixing rings 13 are fixedly provided on the inner wall of the protection cylinder 11. One moving ring 14 is annularly slidably provided on the inner walls of the two fixing rings 13 respectively. A protection component is provided on the inner walls of the two moving rings 14, and a tightening component is provided inside the protection component; the protection component includes a protection ring 40. One end inner wall of the protection ring 40 is fixedly provided with a conical cylinder 34. A plurality of limiting rings 35 are axially spaced on the inner wall of the conical cylinder 34; the tightening component includes a circular plate portion 16. The outer wall of the circular plate portion 16 is in sliding contact with the inner wall of the protection ring 40. One side of the circular plate portion 16 is fixedly provided with an outer sleeve portion 17. The other side of the circular plate portion 16 is fixedly provided with a connecting portion 19. The inner wall of the outer sleeve portion 17 is fixedly provided with an inner sleeve portion 18. A plurality of clamping blocks 20 are radially slidably provided in a circumferential array on the inner wall of the inner sleeve portion 18. One side of the clamping block 20 is fixedly provided with a movable seat 22. A movable rod 23 is slidably provided inside the movable seat 22. A plurality of push rods 29 are axially slidably provided in the inner wall of the outer sleeve portion 17. A first sliding plate 25 is slidably provided inside the circular plate portion 16. A plurality of counterweight blocks 28 are slidably provided in a circumferential array on one side of the first sliding plate 25. A plurality of first elastic rods 32 are obliquely provided in a circumferential array on the outer wall of the connecting portion 19.

[0028] Preferably, referring to the attachedFigure 3 , attached Figure 7 to attached Figure 10 , attached Figure 12 , one end of the movable rod 23 is in sliding contact with the inclined surface at one end of the push rod 29, the other end of the movable rod 23 is internally connected to the movable seat 22 and is provided with a first spring 24, the other end of the push rod 29 is in sliding contact with the inclined surface on one side of the counterweight 28, one end of the first elastic rod 32 is provided with a pressing block 33, the pressing block 33 slides on the conical wall of the conical cylinder 34, and one fixing plate 37 is fixedly provided on each of the two sides of the first elastic rod 32, and a rubber member 38 is provided on one side of the fixing plate 37.

[0029] Preferably, referring to attached Figure 7 , attached Figure 9 , attached Figure 10 , attached Figure 11 , the inner walls of the two movable rings 14 are fixedly connected to the outer wall of the protective ring 40, a plurality of bearings 15 are provided between the outer walls of the movable rings 14 and the inner walls of the fixed ring 13, a plurality of ejector rods 30 are slidably arranged in a circumferential array inside the connecting portion 19, a plurality of arc-shaped grooves 31 are provided in a circumferential array on the outer wall of the connecting portion 19, a push plate 36 is fixedly provided on one side of the first elastic rod 32 in the direction close to the connecting portion 19, one end of the push plate 36 slides in the arc-shaped groove 31, one end of the ejector rod 30 contacts one end of the push plate 36, the other end of the ejector rod 30 is fixedly connected to the other side of the first sliding plate 25, and a second spring 41 is connected between one side of the first sliding plate 25 and one side inside the circular plate portion 16.

[0030] Preferably, referring to attached Figure 9 , a plurality of first sliding grooves 26 are provided in a circumferential array on one side of the first sliding plate 25, a plurality of first sliding blocks 27 are slidably arranged in the radial direction inside the first sliding grooves 26, and one side of the first sliding block 27 is fixedly connected to the counterweight 28.

[0031] Preferably, referring to attached Figure 9 , a plurality of second sliding grooves 44 are provided in a circumferential array on the inner wall at one end of the protective ring 40, a plurality of second sliding blocks 45 are fixedly provided in a circumferential array on the outer wall of the circular plate portion 16, the second sliding blocks 45 slide in the second sliding grooves 44, a rubber plate 46 is fixedly provided on one side inside the second sliding grooves 44, and one side of the rubber plate 46 contacts the inclined surface on one side of the second sliding block 45.

[0032] Preferably, referring to attached Figure 9 , a plurality of card slots 48 are provided at intervals on one inclined surface of the rubber plate 46, and a plurality of clamping blocks 49 are slidably arranged inside the second sliding block 45.

[0033] Preferably, referring to attached Figure 9, a number of second sliding plates 52 are radially slidably arranged inside the inner circumference of the circular plate portion 16. A second elastic rod 50 is fixedly connected between one side of each second sliding plate 52 and a number of clamping blocks 49, and a third spring 47 is connected between one side of the second sliding plate 52 and the inner wall of the circular plate portion 16.

[0034] Preferably, referring to Appendix Figure 1 to Appendix Figure 3 , Appendix Figure 12 , Appendix Figure 13 , the outer sleeve portion 17 is made of 60HRC high-hard steel, and the inner sleeve portion 18 and the clamping block 20 are made of copper-based shape memory alloy.

[0035] Preferably, referring to Appendix Figure 5 , Appendix Figure 7 , one end of the connecting portion 19 is connected to the inner end of the conical cylinder 34 and provided with a compression spring 39.

[0036] Preferably, referring to Appendix Figure 1 , Appendix Figure 7 , one end of the conical cylinder 34 is provided with a through hole 43, one end of the connecting portion 19 is internally provided with a spline groove 42 for connecting with the output end of the driving motor in the housing 10, and a control button 51 is provided on one side of the middle of the housing 10.

[0037] Specific usage method of the present invention: First, the staff holds the handle portion of the housing 10, so that one end of the nut enters the inner sleeve portion 18. Push the tightening assembly to axially slide in the protection assembly, the circular plate portion 16 axially slides in the protection ring 40, and the axial sliding of the circular plate portion 16 drives the connecting portion 19 and the six first elastic rods 32 and the pressing block 33 to axially move. The six pressing blocks 33 are guided by the conical inner wall of the conical cylinder 34, so that the six pressing blocks 33 gradually move radially inward. The radial inward movement of the six pressing blocks 33 respectively causes the six first elastic rods 32 to bend and deform, and the bending deformation of the six first elastic rods 32 drives the six pairs of fixing plates 37 and the rubber parts 38 to move radially inward. The radial inward movement of the six pairs of rubber parts 38 squeezes and contacts the outer wall of the connecting portion 19, thereby improving the stability between the protection assembly and the tightening assembly. Among them, the axial sliding of the circular plate portion 16 drives the connecting portion 19 to axially slide, and the axial sliding of the connecting portion 19 compresses the compression spring 39 to generate an elastic force. Under the action of the elastic force of the compression spring 39, the inner sleeve portion 18 is elastically pressed on one end of the nut, so as to quickly install and disassemble the nut. The axial sliding of the connecting portion 19 makes the output end of the driving motor in the housing 10 enter the spline groove 42, so that the output end of the driving motor is connected to the spline groove 42. The pressing block 33 slides on the conical inner wall of the conical cylinder 34, and a number of limiting rings 35 are used to limit the pressing block 33, so as to prevent the tightening assembly from moving arbitrarily in the protection assembly during the process of screwing the nut.

[0038] Meanwhile, six pressing blocks 33 move radially inwards, respectively bending and deforming six first elastic rods 32. The bending and deformation of the six first elastic rods 32 drive one ends of the six push plates 36 to slide arcuately in the six arc-shaped grooves 31 respectively. The arcuate sliding of one end of the push plate 36 in the arc-shaped groove 31 pushes the ejector rod 30 to slide axially. The axial sliding of the ejector rod 30 pushes the first sliding plate 25 to slide axially in the circular plate portion 16, and the axial sliding of the first sliding plate 25 drives the six push rods 29 to slide axially. One end of the push rod 29 is in inclined surface contact with one end of the movable rod 23, and the axial sliding of the push rod 29 guides and pushes the movable rod 23, so that the six movable rods 23 and the movable seats 22 move radially inwards. The radial inward movement of the six movable seats 22 drives the six clamping blocks 20 to move radially inwards, and the radial inward movement of the six clamping blocks 20 clamps and fixes the outer wall of the nut, which is beneficial to improving the smooth and rapid screwing of the nut and reducing the situation of the nut slipping. Among them, the axial sliding of the first sliding plate 25 in the circular plate portion 16 compresses the second spring 41 to generate elastic force, and under the elastic force of the second spring 41, one end of the ejector rod 30 is always in contact with one end of the push plate 36.

[0039] Secondly, the axial sliding of the circular plate portion 16 drives the six second sliders 45 to slide, so that the six second sliders 45 slide axially in the six second sliding grooves 44 respectively. One side of the second slider 45 is in inclined surface contact with one side of the rubber plate 46. The second slider 45 slides axially in the second sliding groove 44, gradually increasing the extrusion and friction force between the second slider 45 and the rubber plate 46, thereby gradually increasing the stability between the protection component and the tightening component, which is beneficial to the smooth screwing of the nut. Among them, the six second sliders 45 slide axially in the six second sliding grooves 44 respectively, so that the circular plate portion 16 slides axially stably in the protective ring 40.

[0040] Then, the staff adjusts the rotation speed of the drive motor in the housing 10 by pressing the control button 51. The output end of the drive motor passes through the through hole 43 and is connected to the spline groove 42. The rotation of the output end of the drive motor drives the connecting portion 19, the circular plate portion 16, the outer sleeve portion 17, and the inner sleeve portion 18 to rotate. The rotation of the inner sleeve portion 18 screws the nut, so as to install and disassemble the nut smoothly and quickly.

[0041] Meanwhile, the rotation of the connecting portion 19 drives the rotation of the circular plate portion 16. Through the axial sliding of the six second sliders 45 in the six second sliding grooves 44 respectively, the protective ring 40 rotates. The rotation of the protective ring 40 drives the two movable rings 14 to slide annularly in the two fixed rings 13 respectively. Through a number of bearings 15 located between the inner wall of the fixed ring 13 and the outer wall of the movable ring 14, the protective ring 40 rotates smoothly.

[0042] Finally, the rotation of the connecting part 19 drives the rotation of the six ejector rods 30. The rotation of the six ejector rods 30 drives the rotation of the first slide plate 25. The rotation of the first slide plate 25 drives the rotation of the six counterweight blocks 28. The rotation of the six counterweight blocks 28 generates centrifugal force. Under the action of the centrifugal force, the six first sliders 27 move radially outward in the six first chutes 26 respectively, and the six first sliders 27 and the counterweight blocks 28 move radially outward. One end of the push rod 29 is in sliding contact with the inclined surface on one side of the counterweight block 28. The radial outward movement of the six counterweight blocks 28 guides the six push rods 29, causing the six push rods 29 to slide axially. The axial sliding of the six push rods 29 causes the six movable rods 23 to move further radially inward. The further radial inward movement of the six movable rods 23 compresses the six first springs 24 to generate elastic force. Under the elastic force of the six first springs 24, the clamping and fixing effect of the six clamping blocks 20 on the nut is gradually improved, which is beneficial to adjusting the clamping force of the tightening assembly on the nut according to the rotation speed of the tightening assembly, and avoiding slipping during the process of screwing the nut.

[0043] Meanwhile, the radial outward movement of the six counterweight blocks 28 pushes the six second slide plates 52 to move radially outward. The radial outward movement of the second elastic rods 50 pushes several second elastic rods 50 and the clamping blocks 49 to move radially outward, so that several clamping blocks 49 respectively enter several card slots 48. By using the clamping cooperation between several card slots 48 and several clamping blocks 49, the circular plate part 16 is limited and fixed on the inner wall of the protective ring 40, avoiding any movement inside the protective component of the tightening assembly, improving the stability between the tightening assembly and the protective component, and being beneficial to the smooth screwing of the nut. Among them, the radial outward movement of the second slide plate 52 compresses the third spring 47 to generate elastic force. Under the elastic force of the third spring 47, the second slide plate 52 can move radially inward to reset.

[0044] An electric wrench based on an integrated protection component according to the present invention, through the settings of the first elastic rod 32, the pressing block 33, the conical cylinder 34, and the limiting ring 35, the tightening component axially slides within the protection component, and the circular plate portion 16 axially slides within the protection ring 40. The axial sliding of the circular plate portion 16 drives the connecting portion 19 and the six first elastic rods 32 and the pressing block 33 to axially move. The six pressing blocks 33 are guided by the conical inner wall of the conical cylinder 34, so that the six pressing blocks 33 gradually move radially inward. The radial inward movement of the six pressing blocks 33 respectively causes the six first elastic rods 32 to bend and deform, and the bending deformation of the six first elastic rods 32 drives the six pairs of fixing plates 37 and the rubber parts 38 to move radially inward. The radial inward movement of the six pairs of rubber parts 38 is in extrusion contact with the outer wall of the connecting portion 19, thereby improving the stability between the protection component and the tightening component. Further, through the settings of the second slider 45, the second chute 44, and the rubber plate 46, the axial sliding of the circular plate portion 16 drives the six second sliders 45 to slide, so that the six second sliders 45 respectively axially slide within the six second chutes 44. By the contact of one side of the second slider 45 with the inclined surface of one side of the rubber plate 46, the second slider 45 axially slides within the second chute 44, gradually increasing the extrusion friction force between the second slider 45 and the rubber plate 46, thereby gradually improving the stability between the protection component and the tightening component, which is beneficial to the smooth screwing of the nut. Finally, through the settings of the card slot 48, the card block 49, the second sliding plate 52, and the second elastic rod 50, the radial outward movement of the six counterweight blocks 28 pushes the six second sliding plates 52 to move radially outward, and the radial outward movement of the second elastic rod 50 pushes a plurality of second elastic rods 50 and the card block 49 to move radially outward, so that a plurality of card blocks 49 respectively enter a plurality of card slots 48. By using the clamping cooperation between the plurality of card slots 48 and the plurality of card blocks 49, the circular plate portion 16 is limited and fixed on the inner wall of the protection ring 40, preventing any random movement within the protection component of the tightening component, improving the stability between the tightening component and the protection component, and being beneficial to the smooth screwing of the nut.

[0045] An electric wrench based on an integrated protection component according to the present invention, through the settings of a push plate 36, a push rod 30, a first sliding plate 25, a push rod 29, a movable rod 23, a movable seat 22, and a clamping block 20, the radial inner sides of six pressing blocks 33 move respectively to cause six first elastic rods 32 to bend and deform. The bending and deformation of the six first elastic rods 32 drive one ends of the six push plates 36 to slide arcuately in six arc-shaped grooves 31 respectively. The arcuate sliding of one end of the push plate 36 in the arc-shaped groove 31 pushes the push rod 30 to slide axially. The axial sliding of the push rod 30 pushes the first sliding plate 25 to slide axially in the circular plate portion 16, and the axial sliding of the first sliding plate 25 drives the six push rods 29 to slide axially. By the inclined surface contact between one end of the push rod 29 and one end of the movable rod 23, the axial sliding of the push rod 29 guides and pushes the movable rod 23, so that the six movable rods 23 and the movable seats 22 move radially inwards. The radial inwards movement of the six movable seats 22 drives the six clamping blocks 20 to move radially inwards, and the radial inwards movement of the six clamping blocks 20 clamps and fixes the outer wall of the nut, which is beneficial to improving the smooth and rapid screwing action on the nut and reducing the situation of the nut slipping. Further, through the settings of a first spring 24 and a counterweight 28, the rotation of the connecting portion 19 drives the six push rods 30 to rotate, the rotation of the six push rods 30 drives the first sliding plate 25 to rotate, the rotation of the first sliding plate 25 drives the six counterweights 28 to rotate, and the rotation of the six counterweights 28 generates centrifugal force. Under the action of the centrifugal force, the six first sliders 27 move radially outwards in six first sliding grooves 26 respectively, and the six first sliders 27 and the counterweights 28 move radially outwards. By the sliding contact between one end of the push rod 29 and one side inclined surface of the counterweight 28, the radial outwards movement of the six counterweights 28 guides the six push rods 29, so that the six push rods 29 slide axially, and the axial sliding of the six push rods 29 makes the six movable rods 23 move further radially inwards. The further radial inwards movement of the six movable rods 23 respectively compresses the first spring 24 to generate elastic force. Under the elastic force of the six first springs 24, the clamping and fixing action of the six clamping blocks 20 on the nut is gradually improved, which is beneficial to adjusting the clamping force of the tightening component on the nut according to the rotation speed of the tightening component and avoiding the situation of slipping during the screwing of the nut.

[0046] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. An electric wrench based on an integrated protection component, characterized in that: The invention comprises a shell (10), wherein a protective tube (11) is installed at one end of the shell (10), an end cover (12) is provided on the outer wall of one end of the protective tube (11), two fixing rings (13) are fixedly provided on the inner wall of the protective tube (11), a movable ring (14) is provided on the inner wall of the two fixing rings (13) so as to slide in an annular manner respectively, a protective assembly is provided on the inner wall of the two movable rings (14), and a tightening assembly is provided inside the protective assembly; The protection assembly comprises a protection ring (40), a conical cylinder (34) is fixedly provided on the inner wall of one end of the protection ring (40), and a plurality of limiting rings (35) are axially spaced apart on the inner wall of the conical cylinder (34); The tightening assembly comprises a circular plate portion (16), the outer wall of the circular plate portion (16) is in sliding contact with the inner wall of the protective ring (40), an outer sleeve portion (17) is fixedly provided on one side of the circular plate portion (16), a connecting portion (19) is fixedly provided on the other side of the circular plate portion (16), an inner sleeve portion (18) is fixedly provided on the inner wall of the outer sleeve portion (17), a plurality of clamping blocks (20) are radially slidably provided in a circular array on the inner wall of the inner sleeve portion (18), a movable seat (22) is fixedly provided on one side of the clamping block (20), a movable rod (23) is slidably provided inside the movable seat (22), a plurality of push rods (29) are axially slidably provided in the inner wall of the outer sleeve portion (17), a first slide plate (25) is slidably provided inside the circular plate portion (16), a plurality of counterweight blocks (28) are slidably provided in a circular array on one side of the first slide plate (25), and a plurality of first elastic rods (32) are obliquely provided in a circular array on the outer wall of the connecting portion (19).

2. An electric wrench based on an integrated protection component according to claim 1, characterized in that: One end of the movable rod (23) is in sliding contact with the inclined surface of one end of the push rod (29), the other end of the movable rod (23) is connected to the inside of the movable seat (22) and is provided with a first spring (24), the other end of the push rod (29) is in sliding contact with the inclined surface of one side of the counterweight (28), one end of the first elastic rod (32) is provided with a pressure block (33), and the pressure block (33) slides on the conical wall of the conical cylinder (34), and a fixed plate (37) is fixed on both sides of the first elastic rod (32), and a rubber part (38) is provided on one side of the fixed plate (37).

3. The electric wrench based on the integrated protection component according to claim 2, characterized in that: The inner walls of the two movable rings (14) are fixedly connected to the outer wall of the protective ring (40); a plurality of bearings (15) are arranged between the outer wall of the movable ring (14) and the inner wall of the fixed ring (13); a plurality of push rods (30) are slidably arranged in an inner circumferential array of the connecting portion (19); a plurality of arc grooves (31) are arranged in an outer circumferential array of the connecting portion (19); a push plate (36) is fixedly arranged on the side of the first elastic rod (32) close to the connecting portion (19); one end of the push plate (36) slides in the arc groove (31); one end of the push rod (30) contacts with one end of the push plate (36); the other end of the push rod (30) is fixedly connected to the other side of the first slide plate (25); a second spring (41) is connected between one side of the first slide plate (25) and the inner side of the circular plate portion (16).

4. The electric wrench based on the integrated protection component according to claim 1, characterized in that: A plurality of first slide grooves (26) are arranged in a circumferential array on one side of the first slide plate (25), a first sliding block (27) is radially slidably arranged inside the first sliding groove (26), and one side of the first sliding block (27) is fixedly connected to the counterweight block (28).

5. The electric wrench based on the integrated protection component according to claim 1, characterized in that: A plurality of second slide grooves (44) are arranged in a circumferential array on the inner wall of one end of the protective ring (40), and a plurality of second sliders (45) are fixedly arranged in a circumferential array on the outer wall of the circular plate portion (16). The second sliders (45) slide in the second slide grooves (44), and a rubber plate (46) is fixedly arranged on one side of the inner part of the second slide groove (44), and one side of the rubber plate (46) contacts with an inclined surface of one side of the second slider (45).

6. The electric wrench based on the integrated protection component according to claim 5, characterized in that: A plurality of slots (48) are provided at intervals on an inclined surface on one side of the rubber plate (46), and a plurality of clamping blocks (49) are provided inside the second sliding block (45) for sliding movement.

7. The electric wrench based on the integrated protection component according to claim 6, characterized in that: A plurality of second slide plates (52) are radially slidably arranged in an inner circumferential array of the circular plate portion (16); a second elastic rod (50) is fixedly connected between one side of the second slide plate (52) and the plurality of clamping blocks (49); and a third spring (47) is connected between one side of the second slide plate (52) and the inner wall of the circular plate portion (16).

8. The electric wrench based on the integrated protection component according to claim 1, characterized in that: The outer sleeve portion (17) is made of 60HRC high-hardness steel, and the inner sleeve portion (18) and the clamping block (20) are made of copper-based shape memory alloy.

9. The electric wrench based on the integrated protection component according to claim 1, characterized in that: One end of the connecting portion (19) is connected to one end of the interior of the conical tube (34) and is provided with a compression spring (39).

10. The electric wrench based on the integrated protection component according to claim 1, characterized in that: A through hole (43) is provided at one end of the conical cylinder (34), a spline groove (42) for connecting to an output end of a driving motor in the housing (10) is provided inside one end of the connecting portion (19), and a control button (51) is provided on one side of the middle portion of the housing (10).

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