Cutting mechanism for rescue and emergency

Abstract

The invention relates to the technical field of cutting machines, in particular to a rescue emergency cutting mechanism which comprises a basic blade assembly and further comprises sliding blade assemblies and connecting assemblies, the sliding blade assemblies are arranged on the two sides of the basic blade assembly and symmetrically distributed, and the connecting assemblies are arranged at the top ends of the sliding blade assemblies and connected with the sliding blade assemblies in a penetrating mode; the multiple sets of blades are combined and are in an overlapped state in a normal state, the relative distance between the two sets of blades can be adjusted according to needs so that the cutting radius of the blades can be changed, and the problem that time is excessively delayed when the blades are switched in an emergency is solved.

Description

Technical Field

[0001] This invention relates to the field of cutting machine technology, specifically a cutting mechanism for emergency rescue. Background Technology

[0002] A rotary cutting blade is a tool used in equipment such as cement cutting machines. It cuts and repairs cement pavements by rotating rapidly. The cutting blade has sharp edges that can cut and break hard materials such as cement.

[0003] The shape and design of rotary cutting blades vary depending on the specific cutting task and equipment. Generally, cutting blades are made of metallic materials, such as steel or tungsten steel, to provide strength and wear resistance. Cutting blades may come in different shapes, such as round, straight, or serrated, depending on the material to be cut and the cutting method; round is the most common.

[0004] However, in the existing technology, the shape and size of the circular cutting blade are fixed. For different environments and application scenarios, considering factors such as cutting depth, cutting area, and cutting accuracy, larger blades are usually used for cutting over a larger area and depth, while smaller blades are suitable for cutting details. Different cutting blades of different sizes are required for different scenarios. However, considering that in certain situations or due to blade wear, it is necessary to switch blade sizes in a short time, such as when firefighters are conducting emergency rescue operations after a disaster or in a confined space.

[0005] For example, in a vehicle accident, when occupants are trapped inside the vehicle and cannot be rescued by conventional methods, firefighters may need to use cutting tools to cut through the doors, roof, or pillars of the vehicle so that rescuers can enter. The required cutting depth may need to be deep enough to cut through the entire metal structure, but without harming the injured occupants, in order to open a passage and safely rescue the trapped people. In this case, the requirement for cutting depth is too precise, and it is not allowed to be too large or too small. Moreover, because the shape and size of existing cutting blades are fixed, switching blades in an emergency would take too much time.

[0006] To address the aforementioned issues, a cutting blade capable of varying cutting depth is needed to handle these situations. Summary of the Invention

[0007] The purpose of this invention is to provide a cutting mechanism for emergency rescue, which solves the problem of excessive time wasted when switching blades in emergency situations. By setting up multiple sets of blades that are normally in an overlapping state, the relative distance between two sets of blades can be adjusted as needed to change the cutting radius of the blades, thereby achieving the above-mentioned purpose.

[0008] The technical solution of the present invention is as follows: it includes a fixed blade, a sliding blade assembly, and a connecting assembly. The sliding blade assembly is disposed on both sides of the base blade assembly, and the connecting assembly is disposed on the outer surface of the sliding blade assembly. The base blade assembly changes its cutting radius through the sliding blade assembly, and the portion of the sliding blade assembly extending from the base blade assembly is limited by the connecting assembly.

[0009] The fixed blade's central rotating shaft is fixedly connected to both ends of an adjusting shaft. The adjusting shaft is rotatably connected to the inner side of the adjusting shaft. The fixed blade's surface is provided with an arc-shaped sliding groove. The adjusting shaft drives the arc-shaped sliding groove to rotate, changing the relative position of the sliding blade assembly on the fixed blade's surface, thereby controlling the extension dimension of the sliding blade assembly. The connecting component changes its position in the sliding blade assembly through the fixed blade.

[0010] By changing the position of the sliding blade assembly from the center point of the base blade assembly, the base blade assembly is covered. This serves two purposes: firstly, it compensates for the wear of the base blade assembly, and secondly, it expands the cutting radius of the base blade assembly. The connecting assembly automatically fixes and limits the sliding blade assembly that extends from the base blade assembly, thereby ensuring the normal operation of the sliding blade assembly.

[0011] Furthermore, the sliding blade assembly includes an extended blade, a spring slide rod, a fixed plate, an adjusting gear, and an adjusting rack. The extended blade is disposed at both ends of the fixed blade. The spring slide rod is slidably connected to the arc-shaped slide groove. The adjusting rack is slidably connected to the fixed plate. The adjusting gear has an internal rotating thread, and the rotation of the internal rotating thread controls the position of the connecting assembly. The adjusting rack rotates through the adjusting shaft, causing the extended blade to move and change its own position, thereby resetting the connecting assembly.

[0012] On one hand, the spring slide rod slides along the arc-shaped groove to limit the extension blade. On the other hand, the spring of the spring slide rod gives the extension blade a force that squeezes it towards the middle, so that the extension blade part that extends to the fixed blade self-calibrates and engages. During the movement of the extension blade, the telescopic gear moves and meshes with the stationary telescopic rack, which drives the telescopic gear to rotate, providing power for the movement of the subsequent connecting components. When the rotating rack reaches the critical point where it can no longer drive the telescopic gear at the end to rotate, the push block fixed on the extension blade can push the telescopic rack to change displacement, thereby ensuring the rotation of the telescopic gear.

[0013] The connecting slide bar and anti-slip pin provide friction for the extension blade, eliminating the risk of the extension blade loosening or falling off during operation.

[0014] Preferably, the surface of the fixed plate is provided with a limiting groove and a sliding groove, the spring slide rod is fixedly connected to a connecting slide rod, the connecting slide rod is slidably connected to an anti-slip pin, the function of the sliding groove is to limit the movement of the adjusting rack, and the limiting groove is provided with symmetrically distributed concave and convex structures on both sides, the concave and convex structures on both sides of the limiting groove change the frictional stress of the anti-slip pin at various positions of the limiting groove.

[0015] On the one hand, the opening of the limiting groove limits the movement of the extended blade to prevent it from deflecting during movement and causing cutting deviation. On the other hand, the opening of the sliding groove and the recycling groove provides movement space for the connecting component and the sliding blade assembly, ensuring the stability of the fixing plate. The concave and convex structure is used to increase the friction of the extended blade by cooperating with the anti-slip pin, thereby improving the resistance of the extended blade to loosening and slipping.

[0016] The bottom and top ends of the arc-shaped slide groove and the bottom and top ends of the limiting slide groove are equidistant from the center position of the fixed blade, thereby avoiding positional deviation during the movement of the extended blade.

[0017] Furthermore, the connecting assembly includes a tapered bolt, a sleeve, a retainer, a small ball, and a spring push rod. The tapered bolt is disposed on the outer surface of the extension blade, and the sleeve is disposed on the outer surface of the extension blade on the other side. A spring is disposed between the outer surfaces of the sleeve and the extension blade, and the spring on one side of the sleeve provides power for changing the position of the extension blade. The retainer, the small ball, and the spring push rod are all disposed inside the sleeve, and the retainer and the small ball are partially exposed outside the sleeve. The sleeve and the retainer and the small ball form a hollow frustum structure capable of calibrating the position.

[0018] During the movement of the telescopic rack, the spring telescopic rod is gradually compressed. When the position of the connecting rod exceeds the critical point, the elastic energy of the compressed spring telescopic rod is converted into kinetic energy to drive the telescopic rack to move, and the position change of the telescopic rack is completed instantaneously. The tower-shaped spring makes the telescopic rack more adaptable and flexible.

[0019] The connecting assembly includes a tapered bolt, a sleeve, a clip, a small ball, and a spring push rod. The tapered bolt is located on the outer side of the extended blade on the side where the telescopic gear is installed, and it passes through and connects the telescopic gear and the extended blade. The sleeve is located on the outer side of the extended blade on the other side. The sleeve and the tapered bolt are on the same axis. A spring is provided between the outer surfaces of the sleeve and the extended blade to push the sleeve into the extended blade. The clip, the small ball, and the spring push rod are all located inside the sleeve. The clip and the small ball are partially exposed outside the sleeve. The part of the sleeve that contacts the clip and the small ball is shaped as a hollow frustum structure that can be aligned with the position. The hollow size of the sleeve is the same as the diameter of the tapered bolt.

[0020] The spring push rod limits the position of the clip and the ball, thereby enabling the clip and the ball to engage with the tapered bolt, and ultimately limiting and connecting the extended blades on both sides.

[0021] Preferably, the tapered bolt has a threaded groove on the surface near the adjusting gear, which meshes with the thread at the center of the adjusting gear. The middle section of the adjusting gear has a groove with a trapezoidal cross-section that can counteract the friction when the clip and ball slide into the groove. The tapered bolt has a clip and groove near the tapered end, with a right-angled trapezoidal cross-section that can lock the clip inserted into the clip and groove.

[0022] The grooves, clips, and slots provide stability to the connection between the extended blades on both sides, while preventing the clips from loosening or slipping out. The threaded grooves cooperate with the telescopic gears to move the overall position of the tapered bolt.

[0023] Preferably, the spring push rod consists of a push plate, a compression spring, and a push rod. The push plate is tightly fitted with the clip and the ball. The push rod is fixedly connected to the push plate. A clip and a post are slidably connected to the inner side of the push plate near the outer end face of the sleeve. A return spring is provided between the clip and the post and the push plate. Inclined rods are symmetrically arranged on both sides of the clip and the post. One end of the inclined rod is configured as an inclined opening that can convert the thrust into rotational force. The end of the inclined rod away from the inclined opening is fixedly connected to the inner side of the push plate. Buckles are rotatably connected to both sides of the clip and the post. The shape of the buckle near the inclined opening matches the shape of the inclined opening of the inclined rod, thereby providing interlocking for the sleeve and the tapered bolt.

[0024] The two push plates are connected by the compression spring and the push rod, so that the distance between the two push plates can be adjusted, thereby achieving precise control over the position of the card and the ball. The conical bolt drives the buckle to change position, and the buckle angle is changed by the inclined rod, so that the buckle and the card and groove are combined to fix the conical bolt.

[0025] The beneficial effects of this invention are as follows:

[0026] 1. A rescue emergency cutting mechanism of the present invention, wherein the device covers or expands the fixed blade by changing the position of the extended blade relative to the fixed blade, thereby replacing the fixed blade or changing the cutting depth of the fixed blade.

[0027] 2. The present invention provides a cutting mechanism for emergency rescue. This device connects and limits the part of the extended fixed blade by setting an automatically combinable connecting component, thereby preventing the extended blade from deflecting or misaligning during operation and eliminating safety hazards.

[0028] 3. The present invention provides a cutting mechanism for emergency rescue, which enhances the stability of the extended blade by inserting tapered bolts of a specific shape to simultaneously perform locking and fixing of different structures at different positions. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0030] Figure 1 This is a schematic diagram of the overall appearance of the present invention;

[0031] Figure 2 This is a left view of the sliding blade assembly of the present invention;

[0032] Figure 3 This is a side view of the sliding blade assembly of the present invention;

[0033] Figure 4 This is a sectional view of section AA of the present invention;

[0034] Figure 5 This is the present invention. Figure 4 Enlarged view of point B in the middle;

[0035] Figure 6 This is a right view of the sliding blade assembly of the present invention;

[0036] Figure 7 This is a cross-sectional view of the CC section of the present invention;

[0037] Figure 8 This is the present invention. Figure 7 Enlarged view at point D;

[0038] Figure 9 This is the present invention. Figure 8 Enlarged view of point E in the middle.

[0039] In the diagram: 1. Fixed blade; 12. Adjusting shaft; 13. Rotating shaft; 14. Arc-shaped slide groove; 2. Sliding blade assembly; 21. Extended blade; 22. Spring slide rod; 23. Fixed plate; 231. Limiting slide groove; 232. Sliding groove; 233. Recycling trough; 24. Telescopic gear; 25. Telescopic rack; 251. Connecting rod; 252. Spring connecting rod; 26. Connecting slide rod; 27. Sliding connection. 3. Anti-slip pin; 3. Connecting assembly; 31. Tapered bolt; 311. Threaded groove; 312. Groove; 313. Clip and slot; 314. Trapezoidal surface; 315. Right-angled trapezoidal surface; 32. Sleeve plate; 33. Clip and ball; 34. Spring push rod; 341. Push plate; 342. Compression spring; 343. Push rod; 344. Clip and post; 345. Return spring; 346. Inclined rod; 347. Buckle. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Reference Figure 1-9 According to an embodiment of the present invention, a cutting mechanism for emergency rescue is provided, including a fixed blade arc-shaped groove 131, a sliding blade assembly arc-shaped groove 132, and a connecting assembly arc-shaped groove 133. The arc-shaped grooves 132 and 133 of the sliding blade assembly are disposed on both sides of the fixed blade assembly arc-shaped groove 131. The arc-shaped grooves 131 and 133 of the connecting assembly arc-shaped groove 133 are provided. 13 is set on the outer surface of the arc-shaped slide groove 132 of the sliding blade assembly. The arc-shaped slide groove 13 of the basic blade assembly arc-shaped slide groove 131 changes its own cutting radius through the arc-shaped slide groove 132 of the sliding blade assembly. The part of the arc-shaped slide groove 13 of the sliding blade assembly arc-shaped slide groove 132 extending from the arc-shaped slide groove 13 of the basic blade assembly arc-shaped slide groove 13 is limited by the connecting component arc-shaped slide groove 133.

[0042] Arc-shaped slide 13 fixes the blade. Arc-shaped slide 131. Arc-shaped slide 13 has an adjusting shaft fixedly connected to both ends of the central rotating shaft. Arc-shaped slide 1311. Arc-shaped slide 13 has an adjusting shaft rotatably connected to the inner side of arc-shaped slide 13. Arc-shaped slide 1312. Arc-shaped slide 13 fixes the blade. Arc-shaped slide 1311. Arc-shaped slide 13 has an arc-shaped slide on its surface. Arc-shaped slide 1313. Arc-shaped slide 13 has an adjusting shaft. Arc-shaped slide 1311. Arc-shaped slide 13 passes through... The arc-shaped slide 1313 rotates, changing the relative position of the arc-shaped slide 132 of the sliding blade assembly on the surface of the arc-shaped slide 131 of the fixed blade, thereby controlling the extension dimension of the arc-shaped slide 132 of the sliding blade assembly. The arc-shaped slide 13 connecting component arc-shaped slide 133 changes its own position in the arc-shaped slide 132 of the sliding blade assembly through the arc-shaped slide 131 of the fixed blade.

[0043] By moving the sliding blade assembly 2 along the diverging direction of the center point of the base blade assembly 1, the diameter of the base blade assembly 1 is changed. Then, the extended blade is connected by the connecting assembly 3, thereby combining the sliding blade assembly 2 and the base blade assembly 1 into one unit, realizing the replacement or extension of the base blade assembly 1.

[0044] like Figure 1 As shown, the basic blade assembly 1 includes a fixed blade 11, an adjusting shaft 11, and a rotating shaft 12. The adjusting shaft 11 is fixedly connected to both ends of the central rotating shaft of the fixed blade 11 and is on the same axis about the center of the fixed blade 11. The rotating shaft 12 is fixedly connected to the central axis of the fixed blade 11 and is on the same axis as the center of the adjusting shaft 11. The fixed blade 11 has an arc-shaped groove 13. There are three arc-shaped grooves 13 distributed in a circumferential array on the surface of the fixed blade 11. The arc-shaped grooves 13 correspond one-to-one with the sliding blade assembly 2. The rotation of the adjusting shaft 11 can drive the arc-shaped grooves 13 on the surface of the fixed blade 11 to rotate independently, thereby changing the extension distance of the sliding blade assembly 2. The rotating shaft 12 drives the basic blade assembly 1 and the sliding blade assembly 2 to rotate synchronously as a whole.

[0045] The rotation of the adjusting shaft 11 only drives the arc-shaped groove 13 on the surface of the fixed blade 11 to rotate, thereby changing the position of the sliding blade assembly 2 in the arc-shaped groove 13, and thus changing the distance between the end of the sliding blade assembly 2 and the center of the fixed blade 11. That is, it drives the sliding blade assembly 2 to move outward along the center of the fixed blade 11. Then, rotating the shaft drives all the blade assemblies to rotate at the same time, so that the work can be carried out after the two sets of blades are deformed.

[0046] like Figure 2As shown, the arc-shaped slide groove 13 sliding blade assembly includes an extended blade arc-shaped slide groove 1321, a spring slide rod arc-shaped slide groove 1322, a fixed plate arc-shaped slide groove 1323, an adjusting gear arc-shaped slide groove 1324, and an adjusting rack arc-shaped slide groove 1325. The extended blade arc-shaped slide groove 1321 is disposed at both ends of the fixed blade arc-shaped slide groove 1311. The spring slide rod arc-shaped slide groove 1322 is slidably connected to the arc-shaped slide groove 1314. The adjusting rack is also present in the arc-shaped slide groove 13. The arc-shaped slide 1325 and arc-shaped slide 13 are slidably connected to the fixed plate arc-shaped slide 1323 and arc-shaped slide 13. The arc-shaped slide 13 adjusting gear arc-shaped slide 1324 and arc-shaped slide 13 have internal rotating threads. The rotation of the internal rotating threads of the arc-shaped slide 13 adjusting gear arc-shaped slide 1324 and arc-shaped slide 13 controls the position of the connecting component arc-shaped slide 133 and arc-shaped slide 13. The adjusting rack arc-shaped slide 1325 and arc-shaped slide 13 change their own position by rotating the adjusting shaft arc-shaped slide 1311 and arc-shaped slide 13, thereby realizing the reset of the connecting component arc-shaped slide 133 and arc-shaped slide 13.

[0047] like Figure 2 and 4 As shown, the surface of the arc-shaped slide groove 13 has a limiting slide groove, a sliding groove, and a spring slide rod. A connecting slide rod is fixedly connected to the arc-shaped slide groove 13. An anti-slip pin is slidably connected to the arc-shaped slide groove 13. The arc-shaped slide groove 13 has a fixed plate, a limiting slide groove, a sliding groove, and a sliding groove. The arc-shaped slide groove 13 has ... The function of the arc-shaped sliding groove 13232 is to limit the movement of the adjusting rack arc-shaped sliding groove 1325. The arc-shaped sliding groove 13 has symmetrically distributed concave and convex structures on both sides. The concave and convex structures on both sides of the arc-shaped sliding groove 13 change the frictional stress of the anti-slip pin arc-shaped sliding groove 1327 at various positions of the limiting sliding groove arc-shaped sliding groove 13231.

[0048] The bottom and top ends of the arc-shaped slide 13 and the limiting slide 13 are equidistant from the center of the fixed blade arc-shaped slide 13, thereby preventing positional deviation during the movement of the extending blade arc-shaped slide 13.

[0049] The position of the spring slide rod 22 within the arc-shaped groove 13 changes the position of the extending blade 21. This, combined with the limiting groove 231 on the surface of the fixing plate 23, limits the movement direction of the spring slide rod 22, thereby limiting the movement direction of the extending blade 21. This prevents the extending blade 21 from deflecting during movement, thus avoiding asymmetrical distribution of blades on both sides. Simultaneously, the spring in the spring slide rod 22 is compressed. When the extending blade 21 moves out of the position of the fixing blade 11, the compressed spring exerts a force on the extending blade 21 to move it towards the center. The extended blades 21 on both sides can be engaged together. The anti-slip pin 28, in conjunction with the sliding groove 232, allows the anti-slip pin 28 to engage with the concave and convex structures on both sides of the sliding groove 232 at any position of the extended blade, thereby limiting the anti-slip pin 28. At the same time, the connecting slide rod 22 ensures that the anti-slip pin 28 can move freely out of the concave and convex structures and move freely with the spring slide rod 22, while also always maintaining contact with the spring slide rod 22. After the spring slide rod 22 stops moving, it limits the spring slide rod 22, thereby limiting the extended blade 21.

[0050] By setting multiple sets of extended blades 21 distributed in a circumferential array on the surface of the fixed blade 11, a more uniform force distribution on the blade can be achieved. Each arc-shaped blade can bear a portion of the force during the cutting or scraping process, thereby reducing stress concentration on the blade and improving the overall stability and lifespan of the blade. On the other hand, if the blade needs to be replaced or adjusted, only the individual arc-shaped blade needs to be processed, instead of operating the entire circular blade, saving time and effort.

[0051] like Figure 5As shown, the arc-shaped slide groove 13, the adjusting rack arc-shaped slide groove 1325, and the arc-shaped slide groove 13 are provided on one side with a connecting rod arc-shaped slide groove 13251 and a spring telescopic rod arc-shaped slide groove 13252. The connecting rod arc-shaped slide groove 13251 is fixedly connected to the center end of the adjusting rack arc-shaped slide groove 1325. One end of the spring telescopic rod arc-shaped slide groove 13252 is rotatably connected to the adjusting rack arc-shaped slide groove 1325, and the other end is connected to the extension blade arc-shaped slide groove 13252. The outer surface of the 321 arc-shaped slide groove 13 is rotatably connected. The point where the arc-shaped slide groove 13 spring telescopic rod arc-shaped slide groove 13252 arc-shaped slide groove 13 and the connecting rod arc-shaped slide groove 13251 arc-shaped slide groove 13 are rotatably connected is point a. The point where the arc-shaped slide groove 13 spring telescopic rod arc-shaped slide groove 13252 arc-shaped slide groove 13 and the extension blade arc-shaped slide groove 1321 arc-shaped slide groove 13 are rotatably connected is point b. As the arc-shaped slide groove 13 spring telescopic rod arc-shaped slide groove 13252 arc-shaped slide groove 13 gradually approaches point b, the outer diameter of the spring gradually decreases, thereby providing elastic damping for the compression process of the inner telescopic tube of the spring telescopic rod arc-shaped slide groove 13252 arc-shaped slide groove 13.

[0052] The extension blade 21 moves along the limiting slide groove 231, which in turn drives all the telescopic gears 24 to move. During the movement of the telescopic gears 24, they mesh with the telescopic rack 25, thereby driving the telescopic gears 24 to rotate. The telescopic gears 24 mesh with the tapered bolts 31 of the connecting assembly 3, which can drive the tapered bolts 31 to move along the thread direction.

[0053] The length of the telescopic rack 25 is set so as not to affect the rotation of the fixed blade 11. Its length must not exceed the radius of the fixed blade 11. However, if the telescopic rack 25 is too short, it will not be able to drive all the telescopic gears 24 to rotate a sufficient number of times. Through the push block 26 set on the surface of the extension blade 21, when the extension blade 21 moves a certain distance and the last telescopic gear 24 cannot mesh with the telescopic rack 25 to generate sufficient rotation, the push block 26 pushes the telescopic rack 25 to move. Specifically, during the movement of the telescopic rack 25, the spring telescopic rod 252 will be compressed. When point a of the connecting rod 251 in the middle section of the telescopic rack 25 exceeds the midpoint of the connection between the two fixed points b, the compressed spring telescopic rod 252 is released in the opposite direction, thereby driving the telescopic rack 25 to move. Conversely, when the extension blade 21 retracts, the telescopic rack 25 is driven by the push block 26 to move in the opposite direction, so that the telescopic rack 25 can always drive all the telescopic gears 24 to rotate a sufficient number of times.

[0054] like Figure 7As shown, the arc-shaped slide 13 connecting assembly includes a conical bolt arc-shaped slide 13, a sleeve arc-shaped slide 13, a retainer and ball arc-shaped slide 13, and a spring push rod arc-shaped slide 13. The conical bolt arc-shaped slide 13 is disposed on the outer surface of the extended blade arc-shaped slide 1321. The sleeve arc-shaped slide 13 is disposed on the other outer surface of the extended blade arc-shaped slide 1321. A spring is provided in the middle of the outer side of the groove 13. The spring on one side of the arc-shaped slide groove 13 provides power for changing the position of the extension blade arc-shaped slide groove 1321. The arc-shaped slide groove 13, the small ball arc-shaped slide groove 13, and the spring push rod arc-shaped slide groove 1334 are all located inside the sleeve arc-shaped slide groove 13. The arc-shaped slide groove 13, the small ball arc-shaped slide groove 13, and the small ball arc-shaped slide groove 13 are partially exposed outside the sleeve arc-shaped slide groove 13. The arc-shaped slide groove 13, the sleeve arc-shaped slide groove 1332, and the small ball arc-shaped slide groove 13 are hollow frustum structures that can be used for position calibration.

[0055] The tapered bolt 31 is driven by the telescopic gear 24 to rotate in a spiral motion away from the telescopic gear 24. The sleeve 32 also rotates towards the telescopic gear 24 under the force of the spring on the outer end face. The tapered bolt 31 penetrates the sleeve 32 and is engaged with the sleeve 32 in a horizontal direction. The tapered bolt 31 that enters the sleeve 32 is engaged by the clip and small ball 33 inside the sleeve 32, thus forming a preliminary limit.

[0056] like Figure 8As shown, the arc-shaped slide 13, the conical bolt arc-shaped slide 13, the arc-shaped slide 13 near the adjusting gear ... 13314 Arc-shaped groove 13 can counteract the friction when the card and small ball arc-shaped groove 1333 arc-shaped groove 13 slides into the groove arc-shaped groove 13312 arc-shaped groove 13; arc-shaped groove 13 tapered bolt arc-shaped groove 1331 arc-shaped groove 13 has a card and groove arc-shaped groove 13313 arc-shaped groove 13 near the cone head end, arc-shaped groove 13 card and groove arc-shaped groove 13313 arc-shaped groove 13 has a right trapezoidal surface arc-shaped groove 13315 arc-shaped groove 13, arc-shaped groove 13 right trapezoidal surface arc-shaped groove 13315 arc-shaped groove 13 can lock the buckle inserted into the arc-shaped groove 13 card and groove arc-shaped groove 13313 arc-shaped groove 13 arc-shaped groove 13347 arc-shaped groove 13.

[0057] The spring push rod 34 consists of a push plate 341, a compression spring 342, and a push rod 343. One push plate 341 is tightly fitted with the clip and ball 33, while the other push plate 341 is fixedly connected to the outer end face of the sleeve 32. The diameter of the push plate 341 is the same as that of the inner wall of the sleeve 32, allowing it to slide along the inner wall of the sleeve 32. One end of the push rod 343 is fixedly connected to the push plate 341 on the inner wall of the sleeve 32, and the other end is slidably connected to the push plate 341 on the outer end face of the sleeve 32. A clip and post 344 are provided on the inner side of the push plate 341 near the outer end face of the sleeve 32, and the clip and post 344 are slidably connected to the push plate 341. A return spring 34 is provided in the gap between the clip and post 344 and the push plate 341. 5. The latch and post 344 are symmetrically provided with inclined rods 346 on both sides, and the side of the latch and post 344 facing the tapered bolt 31 is matched with the top of the tapered bolt 31. One end of the inclined rod 346 is set as an inclined opening that can convert the thrust into rotational force. The end of the inclined rod 346 away from the inclined opening is fixedly connected to the inner side of the push plate 341. The two sides of the latch and post 344 are rotatably connected to the buckle 347. The shape of the end of the buckle 347 near the inclined opening matches the shape of the inclined opening of the inclined rod 346. The shape of the other end of the buckle 347 matches the shape of the latch and groove 313. A return spring 348 is fixedly connected to the inner side of the buckle 347. The other end of the return spring 348 is fixedly connected to the latch and post 344.

[0058] The clip and ball 33 are set inside the sleeve 32. Under normal conditions, the clip and ball 33 are squeezed by the spring push rod 24 under the operation of the push plate 341 and the compression spring 342. With the help of the tapered bolt 31, the clip and ball 33 are further limited. When you want to separate the extension blades 21 on both sides, you pull the push rod 343 outward from the extension blade 21, which drives the push plate 341 that contacts the clip and ball 33 to move and compress the compression spring 342, so that the clip and ball 33 can have a certain amount of movement space inside the sleeve 32. At this time, the tapered bolt 31 also loses the clamping force of the clip and ball 33.

[0059] The catch and groove 313 at the top of the tapered bolt 31 provides a second layer of restraint for the tapered bolt 31. When the tapered bolt 31 penetrates the sleeve 32, the top of the tapered bolt 31 reaches the catch and post 344 on the outer end face of the sleeve 32, and pushes the catch and post 344 to move towards the outer side of the extension blade 21. At the same time, the movement of the catch and post 344 causes the buckle 347 to move synchronously. The end of the buckle 347 near the inclined rod 346 contacts the inclined rod 346, so that the buckle 347 is driven by the inclined rod 346 to rotate around the connection point towards the center point of the catch and post 344. The rotation of the buckle 347 causes the catch to move. The other end of buckle 347 slides into the slot 313. The shape of the right-angled trapezoidal surface 315 of the slot 313 reduces the friction of buckle 347 sliding into the slot 313 and restricts buckle 347 within the slot 313, forming a second layer of limiting of the sleeve 32 to the tapered bolt 31. When the push rod 24 is pulled down, the push piece 341 on the outer end face of the sleeve 32 moves outward, the inclined rod 346 is driven synchronously, so that buckle 347 loses the squeezing force of the inclined rod 346, and thus the rotation direction is reset under the action of the return spring 348, thereby releasing the limiting between buckle 347 and slot 313.

[0060] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A cutting mechanism for emergency rescue, comprising a fixed blade (1), characterized in that: It also includes a sliding blade assembly (2) and a connecting assembly (3). The sliding blade assembly (2) is disposed on both sides of the base blade assembly (1), and the connecting assembly (3) is disposed on the outer surface of the sliding blade assembly (2). The base blade assembly (1) changes its own cutting radius through the sliding blade assembly (2), and the part of the sliding blade assembly (2) extending out of the base blade assembly (1) is limited by the connecting assembly (3). The fixed blade (1) has an adjusting shaft (11) fixedly connected to both ends of the central rotating shaft. The adjusting shaft (11) is rotatably connected to the inner side of the rotating shaft (12). The fixed blade (11) has an arc-shaped sliding groove (13) on its surface. The adjusting shaft (11) drives the arc-shaped sliding groove (13) to rotate, thereby changing the relative position of the sliding blade assembly (2) on the surface of the fixed blade (1), thereby controlling the extension dimension of the sliding blade assembly (2). The connecting component (3) changes its position in the sliding blade assembly (2) through the fixed blade (1).

2. The emergency rescue cutting mechanism according to claim 1, characterized in that: The sliding blade assembly (2) includes an extended blade (21), a spring slide rod (22), a fixed plate (23), an adjusting gear (24), and an adjusting rack (25). The extended blade (21) is disposed at both ends of the fixed blade (11). The spring slide rod (22) is slidably connected to the arc-shaped slide groove (14). The adjusting rack (25) is slidably connected to the fixed plate (23). The adjusting gear (24) has a rotating thread inside. The adjusting gear (24) controls the position of the connecting assembly (3) by rotating the internal rotating thread. The adjusting rack (25) changes its own position by rotating the adjusting shaft (11) to drive the extended blade (21) to move, thereby realizing the reset of the connecting assembly (3).

3. The emergency cutting mechanism for rescue as described in claim 2, characterized in that: The fixed plate (23) has a limiting groove (231) and a sliding groove (232) on its surface. The spring slide rod (22) is fixedly connected to a connecting slide rod (26). The connecting slide rod (26) is slidably connected to an anti-slip pin (27). The sliding groove (232) is used to limit the movement of the adjusting rack (25). The limiting groove (231) has symmetrically distributed concave and convex structures on both sides. The concave and convex structures on both sides of the limiting groove (231) change the frictional stress of the anti-slip pin (27) at each position of the limiting groove (231).

4. The emergency cutting mechanism for rescue as described in claim 3, characterized in that: The bottom and top ends of the arc-shaped slide groove (14) and the bottom and top ends of the limiting slide groove (231) are equidistant from the center position of the fixed blade (1), thereby avoiding positional deviation during the movement of the extension blade (21).

5. The emergency rescue cutting mechanism according to claim 4, characterized in that: A connecting rod (251) and a spring telescopic rod (252) are provided on one side of the adjusting rack (25). The connecting rod (251) is fixedly connected to the center end of the adjusting rack (25). One end of the spring telescopic rod (252) is rotatably connected to the adjusting rack (25), and the other end of the spring telescopic rod (252) is rotatably connected to the outer surface of the extension blade (21). The point where the spring telescopic rod (252) is rotatably connected to the connecting rod (251) is point a, and the point where the spring telescopic rod (252) is rotatably connected to the extension blade (21) is point b. As the spring telescopic rod (252) gradually approaches point b from point a, the diameter of the outer spring gradually decreases, thereby providing elastic damping for the compression process of the inner telescopic tube of the spring telescopic rod (252).

6. The emergency rescue cutting mechanism according to claim 5, characterized in that: The connecting assembly (3) includes a tapered bolt (31), a sleeve (32), a clip and a small ball (33), and a spring push rod (34). The tapered bolt (31) is disposed on the outer surface of the extension blade (21), and the sleeve (32) is disposed on the outer surface of the other side of the extension blade (21). A spring is disposed between the outer surfaces of the sleeve (32) and the extension blade (21). The spring on one side of the sleeve (32) provides power for changing the position of the extension blade (21). The clip and the small ball (33) and the spring push rod (34) are both disposed inside the sleeve (32), and the clip and the small ball (33) are partially exposed outside the sleeve (32). The sleeve (32) and the clip and the small ball (33) are hollow frustum structures that can be calibrated.

7. A cutting mechanism for emergency rescue as described in claim 6, characterized in that: The tapered bolt (31) has a threaded groove (311) on the side near the adjusting gear (24). The threaded groove (311) meshes with the thread in the center of the adjusting gear (24). The middle section of the adjusting gear (24) has a groove (312). The cross-section of the groove (312) is a trapezoidal surface (314). The trapezoidal surface (314) can counteract the friction when the clip and ball (33) slide into the groove (312). The tapered bolt (31) has a clip and groove (313) near the cone end. The cross-section of the clip and groove (313) is a right trapezoidal surface (315). The right trapezoidal surface (315) can lock the buckle (347) inserted into the clip and groove (313).

8. The emergency rescue cutting mechanism according to claim 7, characterized in that: The spring push rod (34) consists of a push plate (341), a compression spring (342), and a push rod (343). The push plate (341) is tightly fitted with the clip and ball (33), and the push rod (343) is fixedly connected to the push plate (341). A clip and post (344) are slidably connected to the inner side of the push plate (341) near the outer end face of the sleeve (32). A return spring (345) is between the clip and post (344) and the push plate (341). The clip and post (344) are located on both sides of the push plate. A symmetrical inclined rod (346) is provided. One end of the inclined rod (346) is configured as an inclined opening that can convert the thrust into rotational force. The end of the inclined rod (346) away from the inclined opening is fixedly connected to the inner side of the push plate (341). The two sides of the clip and column (344) are rotatably connected with buckles (347). The shape of the end of the buckle (347) near the inclined opening matches the shape of the inclined opening of the inclined rod (346), thereby providing interlocking for the sleeve (32) and the tapered bolt (31).

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