Field cutting equipment based on house building construction

Abstract

The invention discloses on-site cutting equipment based on house building construction, and relates to the technical field of cutting equipment.The on-site cutting equipment comprises a framework, a handheld part arranged on one side of the framework and a trephine arranged on the other side of the framework, rotating arms are rotationally arranged at the two ends of the framework correspondingly, and auxiliary wheels which are symmetrically and rotationally arranged are arranged at the ends of the rotating arms; the auxiliary wheel can rotate forwards and backwards; a connecting disc is fixedly connected to one side of the auxiliary wheel, and a plurality of sliding rods which are circularly distributed at equal intervals are arranged on one side of the connecting disc. By means of the cutting equipment, the problems that in part of existing cutting equipment for housing construction, a handheld trephine is a common tool for wall cutting operation, but the handheld trephine has a certain weight, and a worker needs to continuously lift the grabbing part of the handheld trephine when cutting upwards are solved. And if the lifting time is too long, the arm fatigue of the worker is easy to occur, and then the lifting force loss is caused, so that the handheld trephine falls off, and the construction safety risk is greatly increased.

Description

Technical Field

[0001] This invention relates to the field of building construction cutting equipment technology, specifically to an on-site cutting device for building construction. Background Technology

[0002] On-site cutting equipment for building construction is mainly used for core materials such as steel bars, concrete, and stone. Common types include steel bar cutting equipment, concrete cutting equipment, stone / tile cutting equipment, and auxiliary cutting equipment.

[0003] For example, a wall panel cutting machine with publication number CN107756651B can achieve multi-angle and high-quality cutting of wall panels, saving materials and manpower, and effectively improving on-site construction production capacity. However, existing building construction cutting equipment still has some shortcomings.

[0004] Among existing building construction cutting equipment, handheld ring saws are commonly used tools for wall cutting. However, in actual construction, this type of equipment presents significant operational risks: Firstly, handheld ring saws have their own weight and lack effective auxiliary support structures; secondly, when making upward cuts, workers must use their arms to hold the gripping part of the equipment throughout the entire process and continuously exert force to control the cutting direction and depth. If the operation time is long, the worker's arm muscles are prone to soreness and weakness due to continuous weight-bearing. As fatigue accumulates, it is very easy to lose the grip. Once this happens, not only will the handheld ring saw fall directly from the hand, but it may also collide with the wall or the operator due to loss of control, affecting cutting accuracy and construction efficiency, and posing a serious threat to the personal safety of personnel on site, significantly increasing the safety risk factor during construction.

[0005] To address the aforementioned issues, there is an urgent need for innovative designs based on existing on-site cutting equipment used in building construction. Summary of the Invention

[0006] The present invention addresses the problem of overly simplistic solutions in existing technologies by providing a significantly different solution. Specifically, the present invention aims to provide an on-site cutting device for building construction, thereby solving the problem mentioned in the background that existing handheld ring saws require continuous support of the gripping part when cutting upwards. If the support time is too long, workers are prone to arm fatigue, which can lead to loss of support, causing the handheld ring saw to fall off and significantly increasing construction safety risks.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an on-site cutting device for building construction, comprising a frame, a handheld part disposed on one side of the frame and a ring saw disposed on the other side of the frame, wherein rotating arms are rotatably disposed at both ends of the frame, and auxiliary wheels are provided at the ends of the rotating arms in a symmetrically rotating manner, the auxiliary wheels being capable of rotating in both forward and reverse directions. A connecting plate is fixedly connected to one side of the auxiliary wheel, and a plurality of sliding rods are provided on one side of the connecting plate in a circular and equally spaced manner. The sliding rods are slidably connected to the connecting plate in the radial direction. The movement and revolution of the sliding rods are driven by the forward and reverse rotation of the auxiliary wheel. The auxiliary wheel is provided with a first friction wheel and a second friction wheel on one side in sequence, and the three are arranged coaxially. The first friction wheel is provided with a first damping assembly, which includes a damping rubber located at one end of the sliding rod's travel stroke. The damping rubber is used to reduce the rotational speed of the sliding rod as it rotates in the opposite direction to the auxiliary wheel. The second friction wheel is provided with a second damping assembly on its inner side. The second damping assembly includes friction pins arranged in a circle and extending through the second friction wheel to the outside. The second friction wheel is also provided with a transmission assembly that transmits the movement of the slide rod to the friction pins. The friction pins extend out and abut against the wall during the reverse rotation of the auxiliary wheel to reduce the rotational speed of the auxiliary wheel.

[0008] Preferably, the first damping assembly further includes a limiting ring arranged at equal angles within the first friction wheel and a lever rotatably disposed at one end of the limiting ring. A circular groove is formed on one side of the first friction wheel, and a shaft block is fixedly connected to the center of the circular groove. The limiting ring is placed in the center of the circular groove to form a slot for the sliding rod to slide. A contraction groove for the pressure plate to slide is formed within the first friction wheel. A torque spring for the lever to reset is sleeved on the rotatable connecting shaft between the lever and the limiting ring.

[0009] Preferably, the transmission assembly includes a pressure plate slidably disposed in a groove, a pressing member fixedly connected to the bottom of the pressure plate, a cylindrical cam sleeved on the pressing member, levers evenly distributed on the outer wall of the cylindrical cam, and pressure plates evenly distributed. The cylindrical cam and the pressing member are both located inside a second friction wheel. Slider blocks are fixedly connected to the top and bottom of the pressure plate. Guide rails evenly distributed are fixedly connected to the inner wall of the second friction wheel. The sliders at the top and bottom of the pressure plate are slidably disposed within the guide rails. A friction pin is fixedly connected to one side of the pressure plate, and a first spring is sleeved on the friction pin.

[0010] Preferably, the outer wall of the second friction wheel has a movable groove for each of the friction pins to slide and be exposed, and the other side of the pressure plate is in movable contact with the end of the lever.

[0011] Preferably, the bottom outer wall of the pressing member is fixedly connected to a drive rod that is arranged at equal angles, and the inner wall of the cylindrical cam is provided with a cam groove for the drive rod to slide and drive the cylindrical cam to rotate.

[0012] Preferably, the inner wall of the pressing member is vacuum-sealed, and a second spring is provided inside it, with the bottom of the second spring connected to the bottom inner wall of the cylindrical cam.

[0013] Preferably, one end of the lever is inclined and misaligned with the outer wall of the limiting ring so that the slide rod can drive the lever to rotate and unfold in the opposite direction.

[0014] Preferably, the groove is specifically a sliding groove and a damping groove. The sliding groove is formed by the outer wall of the limiting ring and the inner wall of the circular groove. The damping groove is formed by the inner wall of the limiting ring and the outer wall of the shaft block. The damping rubber is disposed on the inner wall of the damping groove. The damping groove is connected to the shrinkage groove.

[0015] Preferably, the surface of the connecting plate is provided with a sliding groove for the sliding rod to slide, and a rotating shaft is fixedly connected to the center of the connecting plate, with one end of the rotating shaft rotatably positioned at the center of the shaft block.

[0016] Preferably, a rotating gear meshes at the connection shaft between the rotating arm and the frame, and a return spring is provided at the center of the shaft for the rotating arm to return to its original position.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. When the staff becomes fatigued from holding the device for a long time and pulls down the handpiece, the auxiliary wheel rotates in the opposite direction along the wall. The slide bar slides in the opposite direction synchronously with the connecting plate in the sliding groove. When it touches the inclined block at one end of the limit ring, it pushes the block to swing outward around the connecting axis, opening the damping groove formed by the inner wall of the limit ring and the outer wall of the shaft block. The slide bar then falls into the damping groove and makes close contact with the damping rubber on the inner wall of the groove. The frictional resistance achieves the first deceleration of the auxiliary wheel's reverse rotation, effectively slowing down the descent speed of the equipment. 2. During the first speed reduction operation, after the slide bar enters the damping groove, it squeezes the pressure plate in the groove. The pressure plate slides downward along the contraction groove in the first friction wheel, pushing the bottom pressing component. When the pressing component moves down, it compresses the internal second spring. The drive rod on its outer wall is embedded in the cam groove on the inner wall of the cylindrical cam, driving the cylindrical cam to rotate 30°. The lever on the outer wall of the cylindrical cam rotates accordingly, squeezing the pressure plate in the second friction wheel. This forces the pressure plate to slide along the guide rail towards the wall via the slider, compressing the first spring sleeved on the friction nail. The friction nail extends outward along the movable groove on the outer wall of the second friction wheel, with its tip exceeding the radius of the first friction wheel, and abuts and engages with the wall surface, achieving the second speed reduction through mechanical friction.

[0018] 3. This invention effectively prevents the equipment from falling suddenly and rapidly due to the loss of strength in the worker's arm by using two synergistic frictional deceleration actions, significantly improving the operational stability and safety during wall cutting operations and reducing construction safety risks. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the cutting equipment of the present invention.

[0020] Figure 2 This is a schematic diagram of the overall structure of the cutting device of the present invention from another angle.

[0021] Figure 3 This is a schematic diagram of the auxiliary lifting state of the overall structure of the cutting device of the present invention.

[0022] Figure 4 This is a schematic diagram of the overall structure of the cutting device of the present invention in the state of damping decrease.

[0023] Figure 5 This is a schematic diagram of the closed state of the second damping component of the present invention.

[0024] Figure 6 This is a schematic diagram of the second damping component of the present invention in its start-up state.

[0025] Figure 7 This is a schematic diagram of the closed state of the first damping component of the present invention.

[0026] Figure 8 This is a schematic diagram of the starting state of the first damping component of the present invention.

[0027] Figure 9 This is a schematic diagram of the auxiliary wheel structure of the present invention.

[0028] Figure 10 This is a schematic diagram of the driving component of the second damping assembly of the present invention.

[0029] In the diagram: 1. Frame; 2. Handheld part; 3. Ring saw; 4. Rotating arm; 5. Auxiliary wheel; 6. Second friction wheel; 7. First friction wheel; 8. Cylindrical cam; 9. Lever; 10. Connecting plate; 1001. Slide groove; 11. Pressure plate; 12. Guide rail; 13. Friction pin; 14. First spring; 15. Movable groove; 16. Rotating shaft; 17. Slide rod; 18. Pressure plate; 19. Limiting ring; 20. Lever block; 21. Pressing part; 22. Second spring; 23. Cam groove. Detailed Implementation

[0030] 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.

[0031] Please see Figures 1 to 10 The present invention provides a technical solution: an on-site cutting device for building construction, comprising a frame 1, a handheld part 2 disposed on one side of the frame 1 and a ring saw 3 disposed on the other side of the frame 1, characterized in that: both ends of the frame 1 are rotatably provided with rotating arms 4, and the ends of the rotating arms 4 are provided with auxiliary wheels 5 symmetrically rotated, and the auxiliary wheels 5 can rotate in both forward and reverse directions. A connecting plate 10 is fixedly connected to one side of the auxiliary wheel 5. A plurality of sliding rods 17 are provided on one side of the connecting plate 10 in a circular and equally spaced manner. The sliding rods 17 are slidably connected to the connecting plate 10 in the radial direction. The movement and revolution of the sliding rods 17 are driven by the forward and reverse rotation of the auxiliary wheel 5. A first friction wheel 7 and a second friction wheel 6 are arranged in sequence on one side of the auxiliary wheel 5, and the three are arranged coaxially. The first friction wheel 7 is provided with a first damping assembly. The first damping assembly includes a damping rubber located at one end of the travel stroke of the slide bar 17. The damping rubber is used to reduce the rotational speed of the slide bar 17 as it rotates in the opposite direction with the auxiliary wheel 5. The second friction wheel 6 is provided with a second damping assembly on its inner side. The second damping assembly includes friction pins 13 arranged in a circle and extending through the second friction wheel 6 to the outer side. The second friction wheel 6 is also provided with a transmission assembly that transmits the movement of the slide bar 17 to the friction pins 13. The friction pins 13 extend out and abut against the wall during the reverse rotation of the auxiliary wheel 5 to reduce the rotation speed of the auxiliary wheel 5.

[0032] In this embodiment, when performing wall cutting operations, the worker first holds the handheld part 2 on one side of the equipment frame 1, starts the ring saw 3 on the other side of the frame 1, and then precisely aligns the high-speed rotating ring saw 3 with the preset cutting position on the wall, and drives the ring saw 3 to cut deeper into the wall by pressing the handheld part 2. As the ring saw 3 gradually embeds into the wall, the rotating arms 4, which are rotatably mounted at both ends of the frame 1, are pushed outwards at an angle by the wall's resistance. This causes the symmetrically mounted auxiliary wheels 5 on the rotating arms 4 to fit tightly against the wall surface, completing the auxiliary support preparation for the cutting operation. Subsequently, the operator holds the handheld part 2 and lifts the device upwards. At this time, the auxiliary wheels 5 roll forward along the wall surface, and the sliding rod 17 on the top of the connecting plate 10 slides smoothly in the groove of the first friction wheel 7 (the groove formed by the limiting ring 19 and the inner wall of the groove). Combined with the rolling motion of the auxiliary wheels 5, this enables the ring saw 3 to perform a stable and smooth upward cutting operation on the wall. When the operator experiences arm fatigue from holding the handheld part 2 for an extended period, they can pull down the handheld part 2 to move the entire device downwards along the wall. At this time, the auxiliary wheels 5 rotate in the opposite direction along the wall, causing the sliding rod 17 on the connecting plate 10 to slide synchronously in the opposite direction within the groove. The sliding rod 17, sliding in the reverse direction, will touch the lever 20 at one end of the limiting ring 19 inside the first friction wheel 7, pushing the lever 20 to swing outward around the connection axis between it and the limiting ring 19, thereby opening the slot between the limiting ring 19 and the central axis block of the circular groove (the slot is pre-filled with damping rubber). The sliding rod 17 then falls into the damping rubber slot, and the frictional resistance generated by the close contact between the sliding rod 17 and the damping rubber realizes the first frictional deceleration of the auxiliary wheel 5 rotating in the reverse direction, effectively slowing down the descent speed of the equipment. At the same time, when the sliding rod 17 enters the damping rubber slot, it will squeeze the pressure plate 18 in the slot, pushing the pressure plate 18 downward to press the pressing member 21 at its bottom. After the pressing member 21 is subjected to force, it drives the cylindrical cam 8 sleeved on its outside to rotate 30°, and the lever 9 set at the same angle on the outer wall of the cylindrical cam 8 rotates together, squeezing the spike assembly inside the second friction wheel 6, so that the tip of the spike protrudes from the inside of the second friction wheel 6. Since the radius of the second friction wheel 6 is slightly smaller than that of the first friction wheel 7, the extended spike tip will exceed the radius of the first friction wheel 7 and directly contact the wall surface. The second frictional deceleration is achieved through the contact friction between the spike and the wall. Through the two coordinated frictional deceleration effects, the sudden rapid drop of the equipment due to the loss of strength in the worker's arm can be effectively avoided, which significantly improves the operational stability and safety during the wall cutting operation and reduces construction safety risks.

[0033] The first damping assembly also includes a limiting ring 19 arranged at equal angles within the first friction wheel 7 and a lever 20 rotatably disposed at one end of the limiting ring 19. A circular groove is provided on one side of the first friction wheel 7, and a shaft block is fixedly connected to the center of the circular groove. The limiting ring 19 is placed in the center of the circular groove to form a slot for the sliding rod 17 to slide. A contraction groove for the pressure plate 18 to slide is provided inside the first friction wheel 7. A torque spring for the lever 20 to reset is sleeved on the rotating connecting shaft between the lever 20 and the limiting ring 19.

[0034] In this embodiment, when the slide bar 17 enters the damping rubber groove, it will squeeze the pressure plate 18 in the groove. The pressure plate 18 slides steadily downward along the pre-set shrinkage groove in the first friction wheel 7, and simultaneously pushes the pressing member 21 at its bottom. The torque spring set on the rotating connecting shaft between the limiting ring 19 and the toggle block 20 can reset the toggle block 20 to its original state after it is opened. When the slide bar 17 slides forward in the damping rubber groove, it can push the toggle block 20 upward again, thereby opening the toggle block 20 again.

[0035] The transmission assembly includes a pressure plate 18 slidably disposed in a slot, a pressing member 21 fixedly connected to the bottom of the pressure plate 18, a cylindrical cam 8 sleeved on the pressing member 21, levers 9 evenly distributed on the outer wall of the cylindrical cam 8, and pressure plates 11 evenly distributed. The cylindrical cam 8 and the pressing member 21 are both located inside the second friction wheel 6. Sliders are fixedly connected to the top and bottom of the pressure plate 11. Guide rails 12 evenly distributed are fixedly connected to the inner wall of the second friction wheel 6. The sliders at the top and bottom of the pressure plate 11 are slidably disposed inside the guide rails 12. Friction pins 13 are fixedly connected to one side of the pressure plate 11, and a first spring 14 is sleeved on the friction pins 13.

[0036] The outer wall of the second friction wheel 6 is provided with a movable groove 15 for each friction nail 13 to slide and be exposed, and the other side of the pressure plate 11 is in movable contact with the end of the lever 9.

[0037] In this embodiment, the spike assembly described above consists of a pressure plate 11, a guide rail 12, a friction spike 13, and a first spring 14. When the end of the lever 9 makes contact with the other side of the pressure plate 11 and applies a pushing force, the pressure plate 11 is forced to slide along the guide rail 12 fixed to the inner wall of the second friction wheel 6 via the top and bottom sliders, moving closer to the inner wall of the second friction wheel 6. At the same time, the first spring 14 sleeved on the friction spike 13 is compressed. As the pressure plate 11 slides, the friction spike 13 fixed on one side extends outward along the movable groove 15 opened on the outer wall of the second friction wheel 6. Since the radius of the second friction wheel 6 is slightly smaller than the radius of the first friction wheel 7, the tip of the extended friction spike 13 exceeds the radius range of the first friction wheel 7 and directly contacts the wall surface. Through the mechanical engagement and friction between the friction spike 13 and the wall, a second friction deceleration is achieved.

[0038] The bottom outer wall of the pressing member 21 is fixedly connected with a drive rod that is arranged at equal angles, and the inner wall of the cylindrical cam 8 is provided with a cam groove 23 for the drive rod to slide and drive the cylindrical cam 8 to rotate.

[0039] The inner wall of the pressing member 21 is vacuum-sealed, and a second spring 22 is installed inside it. The bottom of the second spring 22 is connected to the bottom inner wall of the cylindrical cam 8.

[0040] In this embodiment, when the drive rod is pressed downward by the pressing member 21, the second spring 22 is compressed by force, and then the drive rod enters the cam groove 23, causing the cylindrical cam 8 to slide in the cam groove 23 through the drive rod and rotate at an angle of 30°, so that the lever 9 fixedly connected to the outer wall of the cylindrical cam 8 contacts and presses the pressure plate 11.

[0041] One end of the lever 20 is inclined and is misaligned with the outer wall of the limiting ring 19 so that the slide rod 17 can slide in the opposite direction to drive the lever 20 to rotate and unfold.

[0042] As an example in this embodiment, Figure 7 and Figure 8 As shown, the initial state of the misaligned toggle blocks 20 is inclined and a ramp is reserved for the slide rod 17 to push the toggle blocks 20 again. The slide rod 17 rotating in the opposite direction will not trigger the toggle blocks 20 to move. When sliding in the forward direction, the slide rod 17 directly contacts the ramp, thereby making the toggle blocks 20 open again.

[0043] The groove is specifically a sliding groove and a damping groove. The sliding groove is formed by the outer wall of the limiting ring 19 and the inner wall of the circular groove. The damping groove is formed by the inner wall of the limiting ring 19 and the outer wall of the shaft block. Damping rubber is provided on the inner wall of the damping groove. The damping groove is connected to the shrinkage groove.

[0044] In this embodiment, the groove is specifically divided into two parts: a sliding groove and a damping groove. The sliding groove is formed by the outer wall of the limiting ring 19 and the inner wall of the circular groove of the first friction wheel 7, which facilitates the smooth forward sliding of the slide rod 17. The damping groove is formed by the inner wall of the limiting ring 19 and the outer wall of the central axis block of the circular groove. The damping rubber on the inner wall of the damping groove is used to increase the frictional resistance of the slide rod 17 when it slides in the groove. The damping groove is connected to the pre-set shrinkage groove in the first friction wheel 7, which facilitates the pressure plate 18 to slide downward under pressure after the slide rod 17 enters the damping groove.

[0045] The surface of the connecting plate 10 is provided with a sliding groove 1001 for the sliding rod 17 to slide. A rotating shaft 16 is fixedly connected to the center of the connecting plate 10, and one end of the rotating shaft 16 is rotatably set at the center of the shaft block.

[0046] In this embodiment, the slide rod 17 is slidably disposed in the slide groove 1001 (it should be noted that a return spring is also provided at one end of the slide rod 17 located in the slide groove 1001. When the slide rod 17 slides forward in the damping groove, it contacts the slope at the bottom of the lever 20 and, through the restoring force of the return spring, pushes the lever 20 open again and returns it to the slide groove). The rotating shaft 16 is provided to prevent the first friction wheel 7 and the second friction wheel 6 from sliding synchronously with the auxiliary wheel 5, thereby facilitating the triggering of the first damping assembly and the second damping assembly (i.e., the rotating shaft 16 is assembled in the shaft block, the shaft block is directly connected to the connecting rod of the frame 1, and the auxiliary wheel 5 achieves rotation through the rotating shaft 16).

[0047] A rotating gear meshes with the connecting shaft between the rotating arm 4 and the frame 1, and a return spring is provided at the center of the shaft to allow the rotating arm 4 to return to its original position.

[0048] In this embodiment, the return spring on the connecting shaft between the rotating arm 4 and the frame 1 will release its elastic force after the cutting device is removed from the wall, causing the rotating arm 4 to automatically return to its initial position.

[0049] Working principle: When using this on-site cutting equipment based on building construction, the operator first holds the handheld part 2 on one side of the frame 1 with both hands. After confirming that all parts of the equipment are securely connected, the operator starts the ring saw 3 on the other side of the frame 1 and waits for the ring saw 3 to reach a stable high-speed rotation state. Then, the operator precisely aligns the rotating ring saw 3 with the preset cutting position on the wall and presses the handheld part 2 towards the wall to drive the ring saw 3 to gradually penetrate into the wall, starting the initial cutting action. As the ring saw 3 continuously embeds itself into the wall, the rotating arms 4, which are rotated at both ends of the frame 1, are subjected to the resistance force of the wall and unfold at an angle around the axis connecting them to the frame 1 (at this time, the rotating gear at the connecting shaft meshes and the return spring at the center of the shaft is twisted and stores force). This continues until the auxiliary wheels 5 symmetrically arranged on the rotating arms 4 are completely in contact with the wall surface, completing the auxiliary support and positioning for the cutting operation. At this time, the auxiliary wheel 5 is rotatably connected to the shaft block through the rotating shaft 16 in the center of the connecting plate 10 (the shaft block is fixed on the connecting rod of the frame 1). The slide rod 17 in the sliding groove 1001 on the surface of the connecting plate 10 is in the sliding groove formed by the outer wall of the limiting ring 19 and the inner wall of the circular groove of the first friction wheel 7. The return spring at one end of the slide rod 17 is in the natural state, ready for subsequent actions. Next, the worker lifts the handheld part 2 upwards, and the auxiliary wheel 5 rolls forward along the wall, causing the connecting plate 10 to rotate synchronously through the rotating shaft 16. The sliding rod 17 slides smoothly in the sliding groove, working with the ring saw 3 to achieve stable upward cutting. When the worker becomes fatigued from holding the handheld part 2 for a long time, and pulls it downwards, the auxiliary wheel 5 rotates in the opposite direction along the wall, and the sliding rod 17 slides synchronously in the opposite direction with the connecting plate 10 in the sliding groove, touching the inclined lever 20 at one end of the limiting ring 19. This pushes the lever 20 to swing outwards around the connecting shaft (at this time, the torque spring on the connecting shaft is twisted and stored), opening the damping groove formed by the inner wall of the limiting ring 19 and the outer wall of the shaft block. The sliding rod 17 then falls into the damping groove and comes into close contact with the damping rubber on the inner wall of the groove. The frictional resistance achieves the first deceleration of the auxiliary wheel 5 rotating in the opposite direction. During the initial deceleration operation, after the slide bar 17 enters the damping groove, it squeezes the pressure plate 18 inside the groove. The pressure plate 18 slides downward along the contraction groove (connected to the damping groove) inside the first friction wheel 7, pushing the bottom pressing member 21. When the pressing member 21 moves downward, it compresses the internal second spring 22. The drive rod on the outer wall of the pressing member 21 is embedded in the cam groove 23 on the inner wall of the cylindrical cam 8, driving the cylindrical cam 8 to rotate 30°. The lever 9 on the outer wall of the cylindrical cam 8 rotates accordingly, squeezing the pressure plate 11 inside the second friction wheel 6, forcing the pressure plate 11 to... The slider slides along the guide rail 12 toward the wall, compressing the first spring 14 sleeved on the friction nail 13; the friction nail 13 extends outward along the movable groove 15 on the outer wall of the second friction wheel 6, with its tip exceeding the radius of the first friction wheel 7, and abuts and engages with the wall surface, achieving a second deceleration through mechanical friction. The dual damping works together to prevent the equipment from falling rapidly (it should be noted that the friction nail 13 uses elastic and controllable friction braking to achieve a second deceleration, rather than rigidly piercing the surface of the wall, to avoid damaging the wall). When the staff regains their strength and lifts the equipment upwards again, the auxiliary wheel 5 rotates forward, the slide bar 17 slides forward in the damping groove, contacts the ramp at the bottom of the lever 20, and pushes the lever 20 open by the rebound force of its own return spring. The lever 20 resets and closes the damping groove under the action of the torque spring, and the slide bar 17 returns to the sliding groove. At the same time, the pressure plate 18 resets, the pressing part 21 moves upward under the rebound action of the second spring 22, drives the cylindrical cam 8 to rotate in the opposite direction, the lever 9 disengages from the pressure plate 11, the pressure plate 11 resets under the action of the first spring 14, and the friction nail 13 retracts. After the cutting is completed and the equipment is removed from the wall, the rotating arm 4 resets to the initial position under the action of the return spring, and the entire equipment returns to the standby state.

[0050] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A field cutting device based on house construction, comprising a skeleton (1), a hand-held part (2) arranged on one side of the skeleton (1), and a ring saw (3) arranged on the other side of the skeleton (1), characterized in that: Both ends of the skeleton (1) are rotationally provided with rotating arms (4), and the end of the rotating arm (4) is provided with an auxiliary wheel (5) which can rotate in forward and reverse directions. One side of the auxiliary wheel (5) is fixedly connected with a connecting disc (10), one side of the connecting disc (10) is provided with a plurality of slide rods (17) which are circularly and equidistantly distributed, and the slide rods (17) are slidingly connected with the connecting disc (10) in the radial direction, and the forward and reverse rotation of the auxiliary wheel (5) drives the movement and revolution of the slide rods (17). One side of the auxiliary wheel (5) is sequentially provided with a first friction wheel (7) and a second friction wheel (6), and the three are coaxially arranged. The inner side of the first friction wheel (7) is provided with a first damping assembly, the first damping assembly comprises damping rubber located at one end of the movement stroke of the slide rod (17), and the damping rubber is used to reduce the rotating speed of the slide rod (17) when the auxiliary wheel (5) reversely rotates. The inner side of the second friction wheel (6) is provided with a second damping assembly, the second damping assembly comprises friction nails (13) which are circularly arranged and can extend to the outer side through the second friction wheel (6), and the inner side of the second friction wheel (6) is provided with a transmission assembly for transmitting the movement of the slide rod (17) to the friction nails (13), and the friction nails (13) are stretched out and abut against the wall body in the reverse rotation process of the auxiliary wheel (5), and are used to reduce the rotating speed of the auxiliary wheel (5).

2. The on-site cutting apparatus based on housing construction according to claim 1, characterized in that: The first damping assembly further comprises a limiting ring (19) which is equiangularly arranged in the first friction wheel (7) and a push block (20) which is rotationally arranged at one end of the limiting ring (19), one side of the first friction wheel (7) is provided with a circular groove, the center of the circular groove is fixedly connected with an axis block, the limiting ring (19) is arranged in the center of the circular groove to form a separation groove for the slide rod (17) to slide, a contraction groove is formed in the first friction wheel (7) for the slide of a pressure disc (18), and a torque spring is arranged on the rotating connection shaft of the limiting ring (19) and the push block (20) to reset the push block (20).

3. The on-site cutting apparatus based on housing construction according to claim 1, characterized in that: The transmission assembly comprises a pressure disc (18) which is slidingly arranged in the separation groove, a pressing piece (21) which is fixedly connected at the bottom of the pressure disc (18), a cylindrical cam (8) which is sleeved on the pressing piece (21), a push rod (9) which is equiangularly arranged on the outer wall of the cylindrical cam (8), and a pressing plate (11) which is equiangularly arranged, the cylindrical cam (8) and the pressing piece (21) are located in the second friction wheel (6), the top and bottom of the pressing plate (11) are fixedly connected with slide blocks, the inner wall of the second friction wheel (6) is fixedly connected with equiangularly arranged guide rails (12), the slide blocks on the top and bottom of the pressing plate (11) are slidingly arranged in the guide rails (12), the friction nails (13) are fixedly connected on one side of the pressing plate (11), and the first spring (14) is sleeved on the friction nails (13).

4. The on-site cutting equipment based on house construction according to claim 3, characterized in that: The outer wall of the second friction wheel (6) is provided with a movable groove (15) for each friction nail (13) to slide and expose, and the other side of the pressing plate (11) is in movable contact with the end of the push rod (9).

5. The on-site cutting apparatus based on housing construction according to claim 3, characterized by: The bottom outer wall of the pressing piece (21) is fixedly connected with driving rods arranged at equal angles, and the inner wall of the cylindrical cam (8) is provided with cam grooves (23) for sliding driving of the cylindrical cam (8) to rotate.

6. The on-site cutting equipment based on house construction according to claim 5, characterized in that: The inner wall of the pressing piece (21) is provided with a vacuum, and the inside is provided with a second spring (22), and the bottom of the second spring (22) is connected with the inner wall bottom of the cylindrical cam (8).

7. The on-site cutting equipment based on house construction according to claim 2, characterized in that: One end of the shifting block (20) is obliquely arranged and is out of position with the outer wall of the limiting ring (19) to form reverse sliding of the sliding rod (17) to drive the shifting block (20) to rotate and expand.

8. The on-site cutting equipment based on house construction according to claim 2, characterized in that: The groove is specifically a sliding groove and a damping groove, the sliding groove is formed by the outer wall of the limiting ring (19) and the inner wall of the circular groove, the damping groove is formed by the inner wall of the limiting ring (19) and the outer wall of the shaft core, the damping rubber is arranged on the inner wall of the damping groove, and the damping groove is communicated with the contraction groove.

9. The on-site cutting equipment based on house construction according to claim 8, characterized in that: The surface of the connecting disc (10) is provided with a sliding groove (1001) for sliding of the sliding rod (17), the center of the connecting disc (10) is fixedly connected with a rotating shaft (16), and one end of the rotating shaft (16) is rotatably arranged at the center of the shaft core.

10. The on-site cutting equipment based on house construction according to claim 1, characterized in that: The connecting shaft of the rotating arm (4) and the framework (1) is engaged with a rotating gear, and the shaft core is provided with a reset spring for resetting of the rotating arm (4).

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