Mechanical driving wrench

Abstract

The invention relates to a mechanical drive wrench which comprises a base, a telescopic stand column, a cross beam, a wrench box, a gear motor, a crank, a rotating guide rod, a rotating guide rod sliding block, a capped screw, a screw spring seat, a screw spring, a screw spring sliding block, a wrench body, a wrench sliding block and a wrench sliding block limiting block. The gear motor outputs to one end of a crankshaft, and the other end of the crankshaft is connected with a crank; the crank is hinged with the rotating guide rod sliding block; the rotating guide rod sliding block is in sliding connection with the rotating guide rod; the capped screw rod is mounted on the rotating guide rod; the screw spring seat is in threaded connection with the capped screw; the screw spring seat is provided with a screw spring; the other end of the screw spring is connected with the screw spring sliding block; the screw spring sliding block penetrates through a notch hole in one side of the rotating guide rod and then is hinged to the wrench sliding block. The wrench sliding block is slidably connected with the wrench. Compared with the prior art, the device has the advantages of simplicity in operation, stability in movement, high working efficiency, wide application range and the like.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical wrenches, in particular to a mechanical drive wrench. Background Art

[0002] Wrenches are tools frequently used in daily life. They are mainly used to tighten bolts, screws, nuts and other threaded fastening bolts or nuts with openings or holes. They can help people easily complete tasks such as fixing and locking. At the same time, wrenches have also developed into many types to adapt to different workplaces.

[0003] At present, traditional wrenches have high working intensity and low working efficiency. When encountering certain special situations, such as harsh working environment that is not suitable for manual operation and the need to complete high-torque rotation, traditional wrenches cannot complete the work efficiently and are no longer suitable for such work scenarios. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a mechanical drive wrench which is simple to operate, stable in movement, efficient in operation and has a wide range of applications.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A mechanical drive wrench comprises: a base, a telescopic column, a crossbeam, a wrench box, a reduction motor, a crank, a rotating guide rod, a rotating guide rod slider, a capped screw, a screw spring seat, a screw spring, a screw spring slider, a wrench, a wrench slider and a wrench slider limit block;

[0007] The base is fixedly connected to the bottom end of the telescopic column; the top end of the telescopic column is fixedly connected to one end of the crossbeam; the other end of the crossbeam is connected to the wrench box;

[0008] The reduction motor is fixedly installed on the wrench box; the reduction motor outputs to one end of the crank shaft, and the other end of the crank shaft is connected to the crank; the crank is hinged to the rotating guide rod slider; the rotating guide rod slider is slidably connected to the rotating guide rod; the cap screw is installed on the rotating guide rod; the screw spring seat is threadedly connected to the cap screw; the screw spring seat is installed with the screw spring; the other end of the screw spring is connected to the screw spring slider; the screw spring slider passes through the notch hole on one side of the rotating guide rod and is hinged to the wrench slider; the wrench slider is slidably connected to the wrench.

[0009] As a preferred technical solution, the wrench box is in the shape of a flat sector, and the central angle corresponding to the sector area is 60°.

[0010] As a preferred technical solution, the wrench box includes a box frame and a box closing panel;

[0011] The box frame comprises a left limit rod and a right limit rod symmetrically distributed on both sides of the sector area, a center rod located at the center of the sector area, and four arc-shaped slide rails with increasing radii;

[0012] The imaginary extension lines of the left limit rod, the right limit rod and the center rod along the length direction all intersect with the central axis of the circle of the sector-shaped area; the center of the circle corresponding to the arc of the four arc-shaped slide rails coincides with the center of the circle of the sector-shaped area; the left ends of the four arc-shaped slide rails are fixedly connected to the right side of the left limit rod; the right ends of the four arc-shaped slide rails are fixedly connected to the left side of the right limit rod; the middle of the four arc-shaped slide rails is fixedly connected to the center rod;

[0013] The two arc-shaped slide rails located outside the sector-shaped area form a first slide rail pair, and the radial distances between the two arc-shaped slide rails in the first slide rail pair are equal;

[0014] The two arc-shaped slide rails located inside the sector-shaped area form a second slide rail pair, and the radial distances between the two arc-shaped slide rails in the second slide rail pair are equal.

[0015] As a preferred technical solution, a circular arc-shaped slide groove is processed along the circumferential direction at the center of each arc-shaped slide rail;

[0016] The left and right ends of the first slide rail pair and the second slide rail pair are both processed with short slide grooves with the same width and depth as the arc-shaped slide groove;

[0017] A plurality of cylindrical holes are distributed on the contact surface between the left limiting rod and the spanner and on the contact surface between the right limiting rod and the spanner; spring buffer components are installed in the cylindrical holes.

[0018] As a preferred technical solution, a slide groove is provided at the bottom of the rotating guide rod; three square holes are provided in sequence at the top of the rotating guide rod along the length direction of the rotating guide rod, and the three square holes are arranged in the center along the length center line;

[0019] Two coaxial circular through holes are arranged between the three square holes along the length direction, and the capped screw is installed through the two circular through holes; the threaded end of the capped screw is located in the square hole of the rotating guide rod close to the wrench; the disc-shaped stopping structure of the capped screw is located in the square hole in the middle of the rotating guide rod; the nut cap of the capped screw is located in the square hole of the rotating guide rod away from the wrench.

[0020] As a preferred technical solution, the screw spring seat is threadedly connected to the capped screw; the two screw spring seat outer sides of the screw spring seat are respectively in contact with the two square hole sides close to the wrench on the rotating guide rod;

[0021] The spring seat structure on the screw spring slider is equipped with the screw spring; the outer side surfaces of the two screw spring sliders of the screw spring slider are respectively in contact with the two side surfaces of the square holes of the rotating guide rod close to the wrench.

[0022] As a preferred technical solution, a square through hole is opened in the middle of the wrench; the outer side surface of the wrench slider of the wrench slider contacts the side surface of the square through hole in the middle of the wrench.

[0023] As a preferred technical solution, a square hole is opened outwardly and symmetrically on the side of the square through hole between the two wrenches;

[0024] The spanner slider limit block is installed in the square hole through a spring; and one spanner slider limit block is installed in each of the square holes.

[0025] As a preferred technical solution, two sliding pins are provided at the bottom of the wrench.

[0026] As a preferred technical solution, the mechanical drive wrench further comprises: four liftable wheels, wherein the wheels are mounted on the bottom of the base.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. Simple operation: The mechanical drive wrench provided by the present invention drives the crank to rotate through the reduction motor, thereby driving the wrench to slide regularly in the wrench box to achieve the tightening and loosening of the nut, without manual operation, thereby improving the automation degree of the mechanical drive wrench; in addition, the design of the retractable column and the base facilitates the adjustment of the height and position of the mechanical drive wrench to meet the needs of different working scenes; at the same time, the bottom of the base is provided with liftable wheels, which is convenient for moving and fixing the equipment, further improving the convenience of operation;

[0029] 2. High working efficiency: The mechanical drive wrench provided by the present invention adopts a motor-driven mechanical transmission system to provide stable and continuous power, so that the wrench can quickly complete the tightening and loosening of the nut, greatly improving the working efficiency and shortening the working time; compared with the traditional wrench, the mechanical drive wrench does not require frequent manual operation, can work continuously for a long time, maintain stable working efficiency, and is particularly suitable for large-scale nut tightening and loosening tasks;

[0030] 3. Stable movement: The wrench box of the mechanical drive wrench provided by the present invention adopts a flat fan-shaped design, and is provided with symmetrically distributed limit rods and arc-shaped slide rails inside, ensuring that the movement trajectory of the wrench is stable during the sliding process, and is not prone to deviation or shaking, thereby ensuring the accuracy of tightening and loosening; in addition, the reasonable configuration and precise matching of transmission components such as the reduction motor, crank, and rotating guide rod make the entire mechanical drive system run smoothly, the power transmission is efficient and reliable, and failures and errors caused by unstable transmission are reduced.

[0031] 4. Wide scope of application: The mechanical drive wrench provided by the present invention can not only tighten and loosen conventionally installed nuts, but also realize the tightening and loosening of long pipeline joint nuts in fluid medium working systems, meeting the application needs of different industries and fields; in addition, the design of the mechanical drive wrench takes into account the use in harsh working environments, and can efficiently complete work in situations that are not suitable for manual operations, such as high temperature, high pressure, toxic and harmful environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic diagram of the structure of a mechanical drive wrench provided in an embodiment of the present application;

[0033] Figure 2 A schematic diagram of the structure of the twisting part provided in an embodiment of the present application;

[0034] Figure 3 A schematic diagram of the structure of the rotating guide rod provided in an embodiment of the present application;

[0035] Figure 4 This is a schematic diagram of the structure inside the rotating guide rod of an embodiment of the present application;

[0036] Figure 5 In the embodiment of this application Figure 2 A partial enlarged view of the middle A;

[0037] Figure 6 A schematic diagram of the structure of a wrench box provided in an embodiment of the present application;

[0038] Figure 7 A schematic diagram of the structure of the box frame provided in an embodiment of the present application;

[0039] Figure 8 In the embodiment of this application Figure 7 A partial enlarged view of point B in the middle;

[0040] Fig. 9 A schematic diagram of the structure of the bottom slide groove of the rotating guide rod provided in an embodiment of the present application;

[0041] Fig.10 A semi-transparent view of the middle square through hole of the wrench provided in an embodiment of the present application;

[0042] Fig.11 A schematic diagram of the structure inside the limit block of the wrench slider provided in an embodiment of the present application;

[0043] Fig.12 A schematic diagram of the structure of a wrench provided in an embodiment of the present application.

[0044] The numbers in the figure show:

[0045] 1-base; 2-telescopic column; 3-crossbeam; 4-wrench box; 5-reduction motor; 6-crank; 7-rotating guide rod; 8-rotating guide rod slider; 9-capped screw; 10-screw spring; 11-screw spring seat; 12-screw spring slider; 13-wrench; 14-wrench slider; 15-wrench slider limit block; 16-wheel; 17-box frame; 18-box closing panel; 19-left limit rod; 20-right limit rod; 21-center rod; 22-arc slide rail; 23-arc slide groove; 24-short slide groove; 25-spring buffer component; 26-disc-shaped stop structure; 27-outer side of screw spring seat; 28-side of square hole close to wrench; 29-outer side of screw spring slider; 30-outer side of wrench slider; 31-side of square through hole in the middle of wrench; 32-slide pin. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0047] The "one embodiment" or "embodiment" referred to herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present application. In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Moreover, the terms "first", "second", etc. are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0048] like Figures 1 to 5As shown, the embodiment of the present application provides a mechanical drive wrench, including: a base 1, a telescopic column 2, a crossbeam 3, a wrench box 4, a reduction motor 5, a crank 6, a rotating guide rod 7, a rotating guide rod slider 8, a capped screw 9, a screw spring seat 11, a screw spring 10, a screw spring slider 12, a wrench 13, a wrench slider 14 and a wrench slider limit block 15;

[0049] The base 1 is fixedly connected to the bottom end of the telescopic column 2; the top end of the telescopic column 2 is fixedly connected to one end of the crossbeam 3; the other end of the crossbeam 3 is connected to the wrench box 4;

[0050] A reduction motor 5 is fixedly installed on the wrench box body 4; the reduction motor 5 outputs to one end of the crank shaft, and the other end of the crank shaft is connected to the crank 6; the crank 6 is hinged to the rotating guide rod slider 8; the rotating guide rod slider 8 is slidably connected to the rotating guide rod 7; the cap screw 9 is installed on the rotating guide rod 7; the screw spring seat 11 is threadedly connected to the cap screw 9; the screw spring seat 11 is installed with a screw spring 10; the other end of the screw spring 10 is connected to the screw spring slider 12; the screw spring slider 12 passes through the notch hole on one side of the rotating guide rod 7 and is hinged to the wrench slider 14; the wrench slider 14 is slidably connected to the wrench 13.

[0051] The above-mentioned reduction motor 5 directly outputs power to the rotating shaft of the crank 6, providing power for the crank 6 connected to the rotating shaft.

[0052] Optionally, the mechanical drive wrench further comprises: four liftable wheels 16, which are mounted at the bottom of the base 1. The mechanical drive wrench can be moved to the work site by the four wheels 16. After reaching the work site, the four wheels 16 are raised simultaneously until the base 1 contacts the ground, thereby fixing the mechanical drive wrench.

[0053] In addition, the bottom of the telescopic column 2 is fixed in the middle of the base 1, and the whole is divided into three sections, all of which have square cross-sections. The cross-section size increases from top to bottom, and the height of the mechanical drive wrench can be adjusted. The crossbeam 3 is a square long rod, one end of which is fixedly connected to the upper end of the telescopic column 2, and the other end is fixedly connected to the wrench box 4. The reduction motor 5 is fixedly installed on the wrench box 4 using multiple bolts.

[0054] like Figure 3 and Figure 4As shown, in the embodiment of the present application, the rotating guide rod 7 is composed of two rods with the same slide groove at the bottom, the left ends of the two rods are provided with a slot-shaped through hole, and the right ends are provided with a square through hole and a circular through hole. The circular hole at the right end is installed on the circular protrusion of the center rod 21 to fix the right end of the rotating guide rod 7, and the rotating guide rod slider 8 slides in the square hole at the right end. Three square holes are opened on the contact surface of the two rods, and two coaxial circular through holes are opened between the square holes. Two square slide rails are provided on the side of the square hole close to the wrench 13 for the screw spring slider 12 to slide along the length direction of the rotating guide rod. Eight square small holes are opened at the upper and lower ends of the outer side surfaces of the two rods, and a circular through hole is opened in the middle of the small hole. Eight hexagon socket bolts are used to fix the two rods to form a rotating guide rod 7.

[0055] The nut cap of the cap screw 9 is installed in the square hole away from the wrench 13. The tail of the cap screw 9 is threaded and installed in the square hole close to the wrench 13. The square hole fixes the cap screw 9 inside the rotating guide rod 7. The center of the screw spring seat 11 is provided with a threaded through hole, which is threadedly connected with the tail of the cap screw 9. One end of the screw spring 10 is installed on the screw spring seat 11. The side of the screw spring slider 12 close to the cap screw 9 is provided with a spring seat structure, and the other end of the screw spring 10 is installed on the spring seat structure. When the nut cap of the cap screw 9 is turned, the tail of the cap screw 9 rotates, and the screw spring seat 11 installed at the tail of the cap screw 9 moves in the direction away from the cap screw 9. The cap screw 9 and the screw spring seat 11 form a screw slider mechanism, and the screw spring 10 is compressed, while driving the screw spring slider 12 to slide in the same direction along the side slide rail.

[0056] At the same time, a notch-shaped through hole is formed at the left end of the rotating guide rod 7, and the screw spring slider 12 located at the notch-shaped through hole is hinged to the wrench slider 14. A square through hole is formed in the middle of the wrench 13, and the wrench slider 14 slides in the square through hole. A large square hole and a small square through hole are symmetrically formed on the two sides 31 of the square through hole in the middle of the wrench, and the wrench slider limit block 15 is installed in the square hole. The wrench slider limit block 15 contains a small spring, one end of which is installed on the spring seat structure inside the wrench slider limit block 15. The turbine at the head of the wrench 13 is turned to adjust the distance between the moving teeth and the fixed teeth at the head of the wrench 13.

[0057] like Figure 6 As shown, the wrench box 4 is in a flat sector shape, and the central angle of the sector area is 60°. The wrench box 4 includes a box frame 17 and a box closing panel 18, and the box closing panel 18 is divided into two left and right panels with a central angle of 30°, both of which are installed outside the box frame 17 and fixedly connected by hexagon socket bolts. Figure 6 It is a schematic structural diagram of the wrench box 4 after the right panel is hidden.

[0058] like Figure 7As shown, the box frame 17 is composed of a left limit rod 19, a right limit rod 20, a center rod 21 and four slender arc-shaped slide rails 22. The imaginary extension lines of the left limit rod 19, the right limit rod 20 and the center rod 21 intersect at one point. The left ends of the four arc-shaped slide rails 22 are fixedly connected to the right side of the left limit rod 19, the right ends of the four arc-shaped slide rails 22 are fixedly connected to the left side of the right limit rod 20, and the middle of the four arc-shaped slide rails 22 is fixedly connected to the center rod 21. The four arc-shaped slide rails 22 are all provided with corresponding arc-shaped slide grooves 23 with equal centers. Short slide grooves 24 with the same width and depth as the arc-shaped slide grooves 23 are provided at both ends of the four arc-shaped slide rails 22 as the entrance or exit of the arc-shaped slide grooves 23, so that the sliding object can slide smoothly and continuously in the slide grooves of each pair of slide rails without obstruction.

[0059] like Figure 8 As shown, a plurality of circular holes are formed at the right end of the left stop rod 19 and the left end of the right stop rod 20, and spring buffer components 25 are installed in the circular holes. The short slide groove 24 is also installed at the contact point between the left and right stop rods, and the spring buffer components 25 are used to buffer when the wrench 13 is about to contact. Since the spring buffer components 25 need to resist the extrusion of the wrench, elastic materials should be selected.

[0060] like Fig. 9 As shown, the disc-shaped stop structure 26 is installed in the middle square hole to limit the movement of the cap screw 9 in the length direction of the rotating guide rod 7, and the outer side surface 27 of the screw spring seat is in close contact with the side surface 28 of the square hole close to the wrench. When the cap screw 9 is turned, the screw spring seat 11 slides in the square hole close to the wrench in the direction away from the cap screw 9. Similarly, the outer side surface 29 of the screw spring slider is in close contact with the side surface 28 of the square hole close to the wrench. The screw spring slider 12 has square slide grooves on both sides, which can slide along two equal-sized square slide rails on the side of the square hole close to the wrench 13 to ensure the stable movement of the screw spring slider 12.

[0061] like Fig.10 As shown, the outer side surface 30 of the wrench slider is in close contact with the side surface 31 of the square through hole in the middle of the wrench, and the wrench slider 14 can only slide back and forth in the square through hole in the middle of the wrench 13. The outer side surface 31 of the square through hole in the middle of the wrench is symmetrically opened with a large square hole and a small square through hole. The head of the wrench slider limit block 15 is installed in the large square hole through a spring, and the tail straight rod passes through the small square through hole. The size of the large square hole is smaller than the outer side surface 30 of the wrench slider to prevent the wrench slider 14 from sinking into the large square hole.

[0062] When the wrench 13 contacts the left limiting rod 19 or the right limiting rod 20 of the wrench box, the corresponding wrench slider limiting block 15 is pushed into the middle square through hole of the wrench 13 by the left limiting rod 19 or the right limiting rod 20 of the wrench box, clamping the wrench slider 14, thereby fixing the position of the wrench slider 14, so that the wrench slider 14 cannot slide along the middle square through hole of the wrench 13. When the wrench 13 leaves the left limiting rod 19 or the right limiting rod 20 of the wrench box, the wrench slider limiting block 15 retracts into the square holes on both sides of the middle square through hole of the wrench 13 under the action of the spring, thereby releasing the position restriction on the wrench slider 14.

[0063] like Fig.11 As shown, when the wrench 13 contacts the left limit rod 19, the left limit block 15 of the wrench slider is pushed into the middle square through hole of the wrench by the left limit rod 19. At this time, the head of the wrench slider limit block 15 clamps the wrench slider 14, fixing the wrench 13 and the wrench slider 14 as a whole, and the small spring in the left limit block 15 of the wrench slider is compressed.

[0064] like Fig.12 As shown, two sliding pins 32 are provided at the bottom of the wrench 13, and the sliding pins 32 are inserted into a pair of arc-shaped sliding grooves 23, so that the rotating guide rod 7 drives the wrench 13 to slide in the slide rails to tighten or loosen the bolts. When the wrench 13 leaves the left limit rod 19 or the right limit rod 20 of the wrench box, the two sliding pins 32 are respectively inserted into the slide grooves 23 of the two pairs of slide rails of the wrench box, so that the wrench 13 moves along the slide rails of the wrench box 4 under the drive of the rotating guide rod 7, so as to realize the tightening and loosening of the nut by the wrench head of the wrench 13.

[0065] Optionally, the two arcuate slide rails 22 located outside the sector-shaped area constitute a first slide rail pair, and the radial distance between the two arcuate slide rails 22 in the first slide rail pair is equal; the two arcuate slide rails 22 located inside the sector-shaped area constitute a second slide rail pair, and the radial distance between the two arcuate slide rails 22 in the second slide rail pair is equal.

[0066] The working principle of the above-mentioned mechanical drive wrench is introduced below:

[0067] Before the mechanical drive wrench works, the device needs to be adjusted in advance. Push the device to the working position; lift the wheel 16 to fix the wrench device; adjust the retractable column 2 so that the wrench device is at a suitable height; turn the head of the capped screw 9, adjust the compression of the screw spring 10, change the pressure applied by the screw spring 10 to the screw spring slider 12, adjust the distance between the screw spring slider 12 and the limit rod, and finally put the wrench 13 in the best position; adjust the angle of the wrench 13 handle so that it is facing the bolt to be tightened; turn the turbine on the head of the wrench 13 to adjust the distance between the moving teeth and the fixed teeth until the bolt to be tightened is just stuck. The remaining structures of the mechanical drive wrench are connected accordingly, and the sliding pin 32 is installed in the slide with the larger radius in each pair of arc-shaped slide grooves 23, and finally the box closing panel 18 is covered to complete the installation of the device.

[0068] Next, the reduction motor 5 is switched on, and the reduction motor 5 outputs torque, which is decelerated to a suitable speed by the reducer and then output to one end of the crank shaft, and the crank 6 connected to the other end of the crank shaft starts to rotate, and the rotating guide rod slider 8 hinged to the crank 6 slides in the square through hole of the rotating guide rod 7, driving the rotating guide rod 7 to rotate, and at the same time, the wrench slider 14 hinged to the screw spring slider 12 slides in the square through hole in the middle of the wrench 13, driving the wrench 13 to rotate in the arc-shaped slide groove 23. When the wrench 13 moves to the right end of the left limit rod 19, the left side of the wrench 13 squeezes the spring buffer component 25 on the right end of the left limit rod 19, causing it to compress and deform, reacting to the wrench 13, reducing the impact and wear of the wrench on the box frame 17. At the same time, the wrench slider 14 moves in the middle square through hole to the wrench slider limit block 15. At this time, the wrench slider limit block 15 located at the left end of the wrench 13 is pushed into the middle square through hole of the wrench 13 by the left limit rod 19, and the wrench slider 14 is stuck. At this time, the wrench 13 and the wrench slider 14 are fixed as a whole, and the entire mechanism becomes a crank slider mechanism. The sliding pin 32 comes out from the left short sliding groove 24 corresponding to the large radius sliding groove in each pair of sliding grooves, and the wrench 13 slides downward along the right end of the left limit rod 19 until the sliding pin 32 slides into the short sliding groove 24 corresponding to the small radius sliding groove in each pair of sliding grooves. At this time, the wrench 13 no longer slides downward, and the tooth head of the wrench 13 just gets stuck in the tightened bolt.

[0069] Then, the wrench 13 enters the arc chute 23 from the short chute 24 on the left side corresponding to the small radius chute in each pair of chute, rotates to the right along the arc chute 23, away from the left limit rod 19, and the small spring inside the wrench left slider limit block 15 returns to its original length. Under the action of the small spring, the wrench left slider limit block 15 retracts into the square hole on the outer side of the middle square through hole of the wrench 13. The wrench left slider limit block 15 releases the constraint on the wrench slider 14, allowing it to slide downward in the middle square through hole of the wrench 13. At this time, the entire mechanism becomes a crank rocker mechanism. When the wrench 13 rotates to the center rod 21, the wrench slider 14 slides to the bottom of the middle square hole of the wrench. At this time, the wrench 13, the rotating guide rod 7 and the crank 6 are in line, and the screwed bolt is twisted by 30°. Then, the wrench slider 14 begins to slide toward the top of the square hole of the wrench. After the wrench 13 completes the rotation, the right side of the wrench 13 contacts the left end of the right limit rod 20, and the wrench slider 14 moves in the opposite direction to the slider limit block 15 on the right side of the wrench. The wrench slider limit block 15 located at the right end of the square through hole in the middle of the wrench is pushed into the square through hole in the middle of the wrench 13 by the right limit rod 20, and the wrench slider 14 is stuck. At this time, the wrench 13 and the wrench slider 14 are fixed as one again, and the entire mechanism is transformed into a crank slider mechanism again. The wrench 13 comes out of the right short slide groove 24 corresponding to the small radius in each pair of slide grooves, and slides upward along the left end of the right limit rod 20 until the sliding pin 32 slides into the slide groove with a larger radius in each pair of arc-shaped slide grooves 23. At this time, the wrench 13 no longer moves upward, the head of the wrench 13 is separated from the screwed bolt, and the bolt is twisted by about 60°. Then, the wrench 13 enters the arc chute 23 from the short chute 24 on the right side corresponding to the large radius in each pair of chute, rotates to the left along the arc chute 23, away from the right limit rod 20, and the wrench slider limit block 15 retracts into the square hole on the outer side of the square through hole in the middle of the wrench 13 under the action of the spring. The wrench slider limit block 15 releases the constraint on the wrench slider 14, allowing it to slide upward in the square through hole in the middle of the wrench 13. At this time, the entire mechanism becomes a crank rocker mechanism again. When the wrench 13 rotates to the center rod 21 again, the wrench slider 14 slides to the top of the square hole in the middle of the wrench. At this time, the wrench 13, the rotating guide rod 7 and the crank 6 are collinear again. Then, the wrench slider 14 begins to slide toward the bottom of the square hole of the wrench, completing a torsion cycle. Repeat the torsion cycle multiple times to complete the loosening and tightening of the bolts.

[0070] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A mechanical drive wrench, characterized in that: include: A base (1), a telescopic column (2), a crossbeam (3), a wrench box (4), a reduction motor (5), a crank (6), a rotating guide rod (7), a rotating guide rod slider (8), a capped screw (9), a screw spring seat (10), a screw spring (11), a screw spring slider (12), a wrench (13), a wrench slider (14) and a wrench slider limit block (15); The base (1) is fixedly connected to the bottom end of the telescopic column (2); the top end of the telescopic column (2) is fixedly connected to one end of the crossbeam (3); the other end of the crossbeam (3) is connected to the wrench box (4); The reduction motor (5) is fixedly mounted on the wrench box (4); the reduction motor (5) outputs to one end of the crank shaft, and the other end of the crank shaft is connected to the crank (6); the crank (6) is hinged to the rotating guide rod slider (8); the rotating guide rod slider (8) is slidably connected to the rotating guide rod (7); the cap screw (9) is mounted on the rotating guide rod (7); the screw spring seat (10) is threadedly connected to the cap screw (9); the screw spring seat (10) is mounted with the screw spring (11); the other end of the screw spring (11) is connected to the screw spring slider (12); the screw spring slider (12) passes through the slot hole on one side of the rotating guide rod (7) and is hinged to the wrench slider (14); the wrench slider (14) is slidably connected to the wrench (13).

2. The mechanical drive wrench according to claim 1, characterized in that: The wrench box (4) is in the shape of a flat sector, and the central angle corresponding to the sector area is 60°.

3. The mechanical drive wrench according to claim 2, characterized in that: The wrench box (4) comprises a box frame (17) and a box closing panel (18); The box frame (17) comprises a left limit rod (19) and a right limit rod (20) symmetrically distributed on both sides of the sector-shaped area, a center rod (21) located at the center of the sector-shaped area, and four arc-shaped slide rails (22) with successively increasing radii; The imaginary extension lines of the left limit rod (19), the right limit rod (20) and the center rod (21) along the length direction all intersect with the center axis of the circle of the sector-shaped area; the center of the circle corresponding to the arc of the four arc-shaped slide rails (22) coincides with the center of the circle of the sector-shaped area; the left ends of the four arc-shaped slide rails (22) are fixedly connected to the right side of the left limit rod (19); the right ends of the four arc-shaped slide rails (22) are fixedly connected to the left side of the right limit rod (20); the middle of the four arc-shaped slide rails (22) is fixedly connected to the center rod (21); The two arc-shaped slide rails (22) located outside the sector-shaped area form a first slide rail pair, and the radial distance between the two arc-shaped slide rails (22) in the first slide rail pair is equal; The two arc-shaped slide rails (22) located inside the sector-shaped area form a second slide rail pair, and the radial distances between the two arc-shaped slide rails (22) in the second slide rail pair are equal.

4. The mechanical drive wrench according to claim 3, characterized in that: A circular arc-shaped slide groove (23) is processed along the circumferential direction at the center of each arc-shaped slide rail (22); The left and right ends of the first slide rail pair and the second slide rail pair are both processed with short slide grooves (24) having the same width and depth as the arc-shaped slide groove (23); A plurality of cylindrical holes are distributed on the contact surface between the left limit rod (19) and the spanner (13) and on the contact surface between the right limit rod (20) and the spanner (13); spring buffer components (25) are installed in the cylindrical holes.

5. The mechanical drive wrench according to claim 1, characterized in that: The bottom of the rotating guide rod (7) is provided with a slide groove; the top of the rotating guide rod (7) is provided with three square holes in sequence along the length direction of the rotating guide rod (7), and the three square holes are arranged in the middle along the length center line; Two coaxial circular through holes are arranged between the three square holes along the length direction, and the cap screw (9) is installed through the two circular through holes; the threaded end of the cap screw (9) is located in the square hole of the rotating guide rod (7) close to the wrench (13); the disc-shaped stop structure (26) of the cap screw (9) is located in the square hole in the middle of the rotating guide rod (7); and the nut cap of the cap screw (9) is located in the square hole of the rotating guide rod (7) away from the wrench (13).

6. The mechanical drive wrench according to claim 5, characterized in that: The screw spring seat (11) is threadedly connected to the cap screw (9); two screw spring seat outer side surfaces (27) of the screw spring seat (11) are respectively in contact with two square hole side surfaces (28) on the rotating guide rod (7) close to the wrench; The spring seat structure on the screw spring slider (12) is installed with the screw spring (10); the two screw spring slider outer side surfaces (29) of the screw spring slider (12) are respectively in contact with the two square hole side surfaces (28) of the rotating guide rod (7) close to the wrench.

7. The mechanical drive wrench according to claim 1, characterized in that: A square through hole is formed in the middle of the wrench (13); and an outer side surface (30) of the wrench slider (14) contacts a side surface (31) of the square through hole in the middle of the wrench.

8. The mechanical drive wrench according to claim 7, characterized in that: A square hole is opened outwardly and symmetrically on the side surface (31) of the square through hole between the two wrenches; The spanner slider limit block (15) is installed in the square hole via a spring; one spanner slider limit block (15) is installed in each of the square holes.

9. The mechanical drive wrench according to claim 8, characterized in that: Two sliding pins (32) are arranged at the bottom of the wrench (13).

10. The mechanical drive wrench according to any one of claims 1 to 9, characterized in that: The mechanical drive wrench further comprises: four liftable wheels (16), which are mounted on the bottom of the base (1).

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