Road bridge expansion joint concrete fast cutting equipment

Abstract

This invention discloses a rapid concrete cutting device for road and bridge expansion joints, relating to the field of concrete cutting technology. The technical solution includes a base plate, two housings, a rotating shaft, a vertical plate, a position adjustment component, and a cutting component. The two housings are fixedly connected to the top of the base plate, the rotating shaft is rotatably connected to the two housings, the vertical plate is fixedly connected to the top of the base plate, the position adjustment component is connected between the vertical plate and the rotating shaft, and the cutting component is connected to the position adjustment component. The beneficial effects of this invention are: by setting up a limiting component including a limiting slider and a locking element, when the cutting component encounters a hard material and generates a reaction force causing a reversal tendency, the trigger element contacts the locked limiting slider, restricting the upward movement of the limiting slider, thereby rigidly blocking the transmission of the reversing torque and preventing the reaction force from directly acting on the hydraulic system of the position adjustment component, effectively preventing damage to the driving component from rigid impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of concrete cutting joint, in particular to a kind of road bridge expansion joint concrete quick cutting joint equipment. BACKGROUND

[0002] Currently, in the field of road bridge expansion joint concrete cutting joint construction, usually adopt hydraulic cylinder to control saw disc to make it rotate around pin shaft and contact with concrete to realize cutting joint operation; However, the existing cutting joint device lacks effective limiting protection components, when saw disc contacts with hard stone and other materials difficult to saw in the cutting joint process, rigid collision will occur, the reaction force generated by the rigid collision will directly act on the hydraulic cylinder driving saw disc feed, which is easy to cause hydraulic cylinder damage, in addition, although some existing technologies are provided with mechanisms such as ratchet to avoid saw disc reverse rotation, but when the device is not used and needs to be stored, such mechanisms cannot bear the gravity of saw disc and other executing components, so that the hydraulic cylinder still needs to bear tension for a long time during equipment static storage, which is also easy to cause hydraulic cylinder fatigue damage, seriously reduces the service life and reliability of the equipment; Therefore, it is necessary to invent a kind of road bridge expansion joint concrete quick cutting joint equipment. SUMMARY

[0003] Therefore, the present application provides a kind of road bridge expansion joint concrete quick cutting joint equipment to solve the problem that cutting joint device is damaged by hard material rigid impact and driving part is under tension for a long time when stored.

[0004] In order to achieve the above purpose, the present application provides the following technical scheme: a kind of road bridge expansion joint concrete quick cutting joint equipment, a kind of road bridge expansion joint concrete quick cutting joint equipment, including bottom plate, two housings, pivot one, vertical plate, position adjusting component and cutting joint component, the two housings are fixedly connected on the top of the bottom plate, the pivot one is rotatably connected on the two housings, the vertical plate is fixedly connected on the top of the bottom plate, the position adjusting component is connected between the vertical plate and the pivot one, the cutting joint component is connected on the position adjusting component; The two housings are each provided with a limiting component, and the limiting component comprises a limiting slide and a locking member; The state transformation component is arranged between the two housings, and the state transformation component comprises a driving source, a supporting member and a fluid driving assembly; The driving source is configured to drive the supporting member to displace and link the fluid driving assembly to pull out the locking member, so that the limiting component is locked in the limiting slide by the locking member in the working state to prevent reverse rotation, and is unlocked by the locking member in the storage state to avoid and is converted to rigid support position by the supporting member lifting the limiting slide.

[0005] Furthermore, the limiting component also includes a trigger and a vertical rod. The limiting slider is slidably sleeved on the outside of the vertical rod, and the locking component is inserted into the limiting slider. The driving source is a hydraulic cylinder two, the supporting component is a push rod, and the fluid driving assembly includes a housing one, a housing two, and a hose. The housing one is connected to the limiting slider, the housing two is connected to the housing, and the hose connects the housing one and the housing two. The hydraulic cylinder two drives the push rod to move, the push rod drives the push rod to move and moves the piston two in conjunction with it. The piston one in the housing one moves through the hose, thereby pulling out the locking component.

[0006] Furthermore, the triggering element is a circular plate, which is fixedly sleeved on the outside of the rotating shaft, and the circular plate is provided with multiple protrusions; the limiting slider is a moving block, which is slidably sleeved on the outside of the upright, and the upright is fixedly embedded in the housing; the locking element is a plug rod, which is inserted into the plug hole on the moving block, and the plug rod is fixedly connected to the piston.

[0007] Furthermore, the second hydraulic cylinder is fixed on the connecting block, the connecting block is fixed on the base plate, and the telescopic end of the second hydraulic cylinder is fixed with a push rod, which passes through the through groove on the housing; the end of the push rod is fixedly connected to the abutment rod, the abutment rod contacts one end of the moving rod, and the other end of the moving rod is fixedly connected to the second piston.

[0008] Furthermore, the limiting component also includes a trigger. When the locking member is inserted into the limiting slider, the limiting slider is locked in a horizontal movement. When the trigger rotates, it contacts the limiting slider, and the limiting slider is restricted from moving upward to prevent reversal.

[0009] Furthermore, the limiting component also includes a trigger. When the driving source drives the support to move to contact the bottom of the limiting slider, the fluid driving assembly pulls out the locking member in conjunction, the limiting slider can move laterally to avoid the trigger, and the support lifts the limiting slider so that its top contacts and supports the trigger.

[0010] Furthermore, the protrusion has a vertical section and an arc-shaped section; an insert plate is slidably embedded on the movable block, one end of the insert plate is located between the two protrusions, and the other end of the insert plate is provided with a baffle; a through groove is provided on the insert plate, and the upright rod passes through the through groove; a spring is sleeved on the outside of the upright rod, and the two ends of the spring contact the bottom of the movable block and the inner wall of the bottom of the housing, respectively.

[0011] Furthermore, two pins are fixed on one side of the movable block, and the pins pass through the movable block; a second spring is sleeved on the outside of the pin, one end of the second spring contacts the baffle, and the other end contacts the protruding end of the pin.

[0012] Furthermore, the position adjustment component includes a base plate, which is fixedly connected to the rotating shaft. A bracket is fixed to the top of the base plate, and a flexible pad is provided on the top of the bracket. A hydraulic cylinder is provided on the upright plate, and the hydraulic cylinder is hinged to the bracket. The slit cutting component includes a motor, a support base, a rotating shaft, and a saw disc. The motor is fixed on the base plate, and a saw disc is fixed to the front end of the rotating shaft. The motor and the rotating shaft are connected through a transmission component.

[0013] Furthermore, a roller is fixed to the bottom of the base plate, a push rod is fixed between the upright plate and the base plate, and an electrical box is fixed to one side of the upright plate.

[0014] The beneficial effects of this invention are: This invention, by setting a limiting component including a limiting slider and a locking element, when the sliding component encounters a hard material and generates a reaction force that causes a reversal tendency, the trigger element contacts the locked limiting slider, and the limiting slider is restricted from moving upward, thereby rigidly blocking the transmission of the reversing torque and preventing the reaction force from acting directly on the hydraulic system of the position adjustment component, effectively preventing the drive component from being damaged by rigid impact.

[0015] In this invention, when the support member is displaced to the bottom of the limiting slider, it can support it, so that the top of the limiting slider is converted into a rigid support position that contacts the trigger member. Thus, the limiting member bears the weight of the actuator such as the slitting member, avoiding the hydraulic system of the position adjustment member from bearing tension for a long time during the equipment's static period, and significantly improving the service life of the drive member and the overall equipment.

[0016] In this invention, a protective shell is also fixedly connected to the rear side of the substrate. The protective shell covers the outside of the transmission component to prevent concrete debris generated during the cutting operation from splashing and jamming the transmission component, thus ensuring that the cutting operation can proceed normally. Attached Figure Description

[0017] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 Provided by the present invention Figure 1 Front sectional view; Figure 3 Provided by the present invention Figure 2 Enlarged view of point A in the image; Figure 4 Exploded view of the two housings, saw blade, base plate and other components provided by the present invention Figure 1 ; Figure 5 Provided by the present invention Figure 4 Enlarged view of point B in the image; Figure 6 Exploded view of the two housings, saw blade, base plate and other components provided by the present invention Figure 2 ; Figure 7 Exploded perspective view of the two housings, rotating shaft one, push rod and other components provided for this invention; Figure 8 Provided by the present invention Figure 7 Enlarged view of point C in the image; Figure 9 Provided by the present invention Figure 1 Rear view stereoscopic view; Figure 10 Exploded perspective view of components such as motor, support base, rotating shaft, and saw blade provided for this invention.

[0020] In the diagram: 1. Base plate; 2. Housing; 3. Rotating shaft one; 4. Vertical plate; 5. Push rod; 6. Electrical box; 7. Roller; 8. Base plate; 9. Support; 10. Flexible pad; 11. Hydraulic cylinder one; 12. Guide rod; 13. Motor; 14. Support base; 15. Rotating shaft; 16. Saw blade; 17. Protective shell; 18. Connecting block; 19. Hydraulic cylinder two; 20. Push rod; 21. Circular plate; 22. 23. Upright pole; 24. Protrusion; 25. Vertical section; 26. Arc-shaped section; 27. Moving block; 28. Insert plate; 29. ​​Arc-shaped part; 30. Stop block; 31. Spring 1; 32. Baffle plate; 33. Pin rod; 34. Spring 2; 35. Box 1; 36. Piston 1; 37. Insert rod; 38. Spring 3; 49. Box 2; 40. Moving rod; 41. Support rod; 42. Flexible hose. Detailed Implementation

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] See attached document Figure 1 -Appendix Figure 10This embodiment provides a rapid concrete cutting device for road and bridge expansion joints, including a base plate 1, two housings 2, a rotating shaft 3, a vertical plate 4, a position adjustment component, and a cutting component. The two housings 2 are fixedly connected to the top of the base plate 1, the rotating shaft 3 is rotatably connected to the two housings 2, the vertical plate 4 is fixedly connected to the top of the base plate 1, the position adjustment component is connected between the vertical plate 4 and the rotating shaft 3, and the cutting component is connected to the position adjustment component. In this embodiment, the position adjustment component includes a base plate 8, which is fixedly connected to the rotating shaft 3. A bracket 9 is fixed on the top of the base plate 8, and a flexible pad 10 is provided on the top of the bracket 9. A hydraulic cylinder 11 is provided on the upright plate 4, and the hydraulic cylinder 11 is hinged to the bracket 9. The base plate 8 serves as the mounting carrier for the cutting component and the position adjustment component. It swings with the rotation of the rotating shaft 3, thereby driving the saw disc 16 to cut into or retract from the concrete road surface. The bracket 9 and the flexible pad 10 constitute the force buffer and connection fulcrum of the hydraulic cylinder 11. The extension and retraction action of the hydraulic cylinder 11 forces the base plate 8 to rotate around the rotating shaft 3 by pushing and pulling the bracket 9, thereby realizing the adjustment of the cutting depth. To further ensure the stability of the substrate 8 during rotation, a guide rod 12 is fixedly connected between the upright plate 4 and the base plate 1. The guide rod 12 passes through the substrate 8 and slides in contact with it, providing additional rigid guiding constraints for the swing of the substrate 8 and preventing it from polarizing when cutting under heavy load. In this embodiment, the kerf cutting component includes a motor 13, a support base 14, a rotating shaft 15, and a saw disc 16. The motor 13 is fixed on the base plate 8, and the saw disc 16 is fixed at the front end of the rotating shaft 15. The motor 13 and the rotating shaft 15 are connected through a transmission component. The motor 13 is fixedly mounted on the base plate 8, and its output torque is transmitted to the rotating shaft 15 through the transmission component, thereby driving the saw disc 16 to rotate at high speed to cut concrete. The support base 14 provides bearing support for the rotating shaft 15 to ensure its coaxiality and stability during high-speed rotation. The transmission component referred to in this application refers to any mechanical transmission structure that can transmit the output torque of the motor 13 to the rotating shaft 15. Its specific implementation is not limited to sprocket and chain assembly or synchronous pulley and synchronous belt assembly. Gear transmission group and belt transmission can also be used, as long as the function of transmitting rotational power is met. In addition, a protective shell 17 is fixedly connected to the rear side of the base plate 8. The protective shell 17 covers the outside of the transmission component to prevent concrete debris generated during the kerf cutting operation from splashing and jamming the transmission component. In this embodiment, a roller 7 is fixed to the bottom of the base plate 1, a push rod 5 is fixed between the upright plate 4 and the base plate 1, and an electrical box 6 is fixed to one side of the upright plate 4. The roller 7 provides support and rolling conditions for the free movement of the equipment on the construction road surface; the push rod 5 serves as a manual push-pull operating handle, which facilitates the operator to control the direction of travel and the cutting position of the equipment; the electrical box 6 is used to house electrical components such as controllers, relays, and power terminals for controlling electrical actuators such as the motor 13, hydraulic cylinder 11, and hydraulic cylinder 19. To ensure the straightness of the cutting operation and prevent the equipment from swinging randomly under force, the two rollers 7 closer to the push rod 5 are preferably omnidirectional wheels for flexible steering and positioning; while the two rollers 7 farther away from the push rod 5 are preferably fixed wheels to provide stable straight trajectory constraints when the cutting is moving. Specifically, the two shells 2 are symmetrically distributed on the top of the base plate 1, serving as support for the rotating shaft 3 and ensuring the stability of the rotating shaft 3 during rotation; the position adjustment component is used to drive the cutting component to generate displacement, enabling it to penetrate deep into the concrete to perform the cutting action; the cutting component is the execution terminal that directly contacts the concrete and performs the cutting operation. Both housings 2 have internal limiting components. Since both housings 2 have limiting components, the two limiting components are mirror-symmetrically distributed and have the same principle. Therefore, a detailed explanation will be given using a single limiting component as an example. The limiting component includes a limit slider and a locking component. Specifically, the limiting slider of the limiting component is a sliding component capable of generating displacement movement. Its displacement path and state determine whether it is in a locked avoidance state or a supporting contact state; the locking component is a plug-in or abutment component used to limit the displacement freedom of the limiting slider. A state transition component is provided between the two housings 2, wherein the state transition component includes a drive source, a support component and a fluid drive assembly; Specifically, the state transformation component can drive the limiting component to perform state transformation. The driving source is a power output unit, the support component is a component that moves with the driving source, and the fluid drive component is a transmission module that uses the principle of fluid mechanics to convert the mechanical power of the driving source into fluid power, thereby remotely controlling the action of the locking component. In this embodiment, pneumatic drive is used, while in other embodiments, hydraulic drive can be used. The drive source is configured to drive the support component to move and link the fluid drive component to pull out the locking component, so that the limiting component is locked in the limiting slider by the locking component in the working state to prevent reverse rotation, and is unlocked by the locking component to avoid collision and is lifted by the support component to convert the limiting slider into a rigid support position. In the working state, the locking component remains inserted in the limiting slider. At this time, the lateral freedom of the limiting slider is rigidly locked. When the cutting component encounters a hard material and generates a reaction force that causes the rotating shaft 3 to have a reverse tendency, the trigger component reverses with the rotating shaft 3 and contacts the locked limiting slider. The limiting slider cannot avoid lateral movement or upward movement, thus rigidly blocking the transmission of the reverse torque, preventing reverse movement, and avoiding the reaction force from directly impacting the hydraulic system in the position adjustment component. In the retracted state, the drive source is activated, and the support component moves to the bottom of the limit slider. At the same time, the fluid drive component pulls out the locking component, and the limit slider is unlocked. Its lateral freedom is restored. When the trigger component is reset with the rotating shaft 3, the limit slider can move laterally to avoid the passage of the trigger component. After the reset is completed, the support component lifts the limit slider so that its top contacts the trigger component. The limit slider, which was originally used to avoid the trigger component, is instantly transformed into a rigid support position that bears the weight of the cutting component. In this embodiment, the limiting component also includes a trigger and a vertical rod 22. The limiting slider is slidably sleeved on the outside of the vertical rod 22, and the locking component is inserted into the limiting slider. The trigger is a component that rotates synchronously with the rotating shaft 3 and is used to move or block the limiting slider. The vertical rod 22 is a component that is fixed inside the housing 2 to provide vertical sliding guidance for the limiting slider. The driving source is hydraulic cylinder 2 19, the support component is push rod 41, and the fluid driving assembly includes housing 1 34, housing 2 38 and hose 42. Housing 1 34 is connected to the limiting slider, housing 2 38 is connected to the housing 2, and hose 42 connects housing 1 34 and housing 2 38. Specifically, hydraulic cylinder 19 drives push rod 20 to move, push rod 20 drives rod 41 to move and piston 39 to move in conjunction with it. Through hose 42, piston 35 in housing 34 moves to pull out the locking component. Specifically, after hydraulic cylinder 19 is started, push rod 20 at its telescopic end produces linear displacement. Push rod 20 can directly drive rod 41 to move horizontally, so that rod 41 moves to the bottom of the limiting slider and supports it. At the same time, the displacement of push rod 20 drives piston 39 to move. Under the action of hose 42, piston 39 moves and piston 35 in housing 34 moves upward, thereby forcibly pulling out the locking component connected to piston 35 from the limiting slider. In this embodiment, hydraulic cylinder 2 19 is fixed on connecting block 18, and connecting block 18 is fixed on base plate 1. Push rod 20 is fixed to the telescopic end of hydraulic cylinder 2 19. Push rod 20 passes through the through groove on housing 2. Connecting block 18 serves as a support component for hydraulic cylinder 2 19 and is firmly fixed to the top of base plate 1, providing support for hydraulic cylinder 2 19 and preventing it from shaking during telescopic movement. The through groove on the side wall of housing 2 provides a movement channel for push rod 20 to pass through. The length of the through groove matches the stroke of push rod 20, ensuring that push rod 20 can smoothly move laterally through the two housings 2 while physically limiting its displacement range. The end of the push rod 20 is fixedly connected to the abutment rod 41. The abutment rod 41 is in contact with one end of the moving rod 40, and the other end of the moving rod 40 is fixedly connected to the piston 39. Specifically, after the push rod 20 passes through the through groove, its end is rigidly connected to the abutment rod 41 located inside the housing 2, so that the abutment rod 41 moves synchronously with the push rod 20. During the translation process, the abutment rod 41 can drive the moving rod 40 to move, thereby driving the piston 39 to move. In this embodiment, the trigger is a circular plate 21, which is fixedly sleeved on the outside of the rotating shaft 3. The circular plate 21 has multiple protrusions 23 and can rotate synchronously with the rotating shaft 3. The limiting slider is a moving block 26, which is slidably sleeved on the outside of the upright rod 22, which is fixedly embedded in the housing 2. The locking element is a plug rod 36, which is inserted into the insertion hole on the moving block 26. The plug rod 36 is fixedly connected to the piston 35. The slot is through the movable block 26 and the insert plate 27. When the insert rod 36 is naturally inserted into the slot under the preload of the spring 37, the insert plate 27 and the movable block 26 cannot move laterally relative to each other. At this time, the insert plate 27 is in a lateral locking state. When the fluid drive assembly linkage piston 35 moves upward and pulls out the insert rod 36, the slot is emptied, and the insert plate 27 can move and retract freely within the movable block 26. Furthermore, the protrusion 23 has a vertical section 24 and an arc-shaped section 25. To absorb the thrust of the arc segment 25, a sliding insert 27 is slidably embedded on the moving block 26. One end of the insert 27 is located between two protrusions 23, and the other end of the insert 27 is provided with a baffle 31. The end of the insert 27 located between the two protrusions 23 is provided with an arc-shaped part 28. The arc-shaped part 28 and the arc segment 25 of the protrusion 23 form a curved surface fit relationship. When the arc segment 25 rotates and pushes the arc-shaped part 28, the insert 27 can smoothly retract and move laterally into the moving block 26 to avoid hard jamming. The baffle 31 serves as a limit and spring mounting baffle when the insert 27 moves laterally to prevent the insert 27 from coming out of the moving block 26. To ensure that the insert plate 27 does not collide with the upright 22 when it moves laterally, the insert plate 27 is provided with a through groove, through which the upright 22 passes. The upright 22 not only provides vertical guidance for the moving block 26, but also, by passing through the through groove of the insert plate 27, it can prevent the two from colliding. In order to enable the movable block 26 to return to its original position after being pushed down by the protrusion 23 on the circular plate 21, a spring 30 is sleeved on the outside of the upright 22. The two ends of the spring 30 are in contact with the bottom of the movable block 26 and the inner wall of the bottom of the housing 2, respectively. When the protrusion 23 pushes the insert plate 27 to make the movable block 26 move down to avoid it, the spring 30 is compressed and stores energy. Once the protrusion 23 passes the insert plate 27, the spring 30 immediately releases its potential energy and pushes the movable block 26 back to its original position, ready to welcome the next protrusion 23. To enable the insertion plate 27 to quickly return to its original position after lateral retraction, two pins 32 are fixed on one side of the moving block 26. The pins 32 pass through the baffle 31. A second spring 33 is sleeved on the outside of the pins 32. One end of the second spring 33 contacts the baffle 31, and the other end contacts the protruding end of the pin 32. When the arc-shaped section 25 of the protrusion 23 pushes the arc-shaped part 28 to make the insertion plate 27 move laterally, the baffle 31 moves with the insertion plate 27 and compresses the second spring 33. When the protrusion 23 passes the arc-shaped part 28, the second spring 33 quickly releases its potential energy and pushes the insertion plate 27 back to its original position in the direction of the protrusion 23 through the baffle 31, ensuring that the insertion plate 27 can return to its original position in time to welcome or support the next protrusion 23. In this embodiment, the limiting component also includes a trigger. When the locking component is inserted into the limiting slider, the limiting slider is locked in a horizontal movement. When the trigger rotates, it contacts the limiting slider, and the limiting slider is restricted from moving upward to prevent reverse rotation. Specifically, in the working state, the insertion rod 36 is kept inserted into the insertion hole of the moving block 26 and the insertion plate 27 under the preload of the spring 37. This prevents the insertion plate 27 and the moving block 26 from moving horizontally, and the insertion plate 27 cannot retract laterally within the moving block 26 to avoid it. That is, the limiting slider is in a horizontal movement locked state. When the cutting component encounters hard materials (such as stones inside concrete that are difficult to cut) during operation, it generates a reaction force, causing the rotating shaft 3 to reverse. The circular plate 21 reverses with the rotating shaft 3, and the protrusion 23 on it also reverses and comes into contact with the locked insert plate 27. Since the insert plate 27 cannot move laterally to avoid it, the insert plate 27 acts as a block to the protrusion 23. At the same time, the stop block 29 fixedly sleeved on the outside of the upright 22 comes into contact with the top of the moving block 26, limiting the upward displacement space of the moving block 26. This prevents the moving block 26 and the insert plate 27 from lifting upward to avoid it. In this way, the reversal trend is rigidly blocked at the contact surface between the protrusion 23 and the insert plate 27, and cannot continue to be transmitted to the position adjustment component. This effectively prevents reversal, avoids the reaction force from directly impacting the hydraulic cylinder 11, and protects the drive component from rigid damage. In actual use, there is an unavoidable small gap between the protrusion 23 and the insert plate 27. If the protrusion 23 cannot cross the gap and contact the insert plate 27 in time during the reversal, the reaction force will still directly impact the hydraulic cylinder 11 during the gap crossing. Therefore, in this embodiment, the position adjustment component includes a base plate 8, which is fixedly connected to the rotating shaft 3. A bracket 9 is fixed on the top of the base plate 8, and a flexible pad 10 is provided on the top of the bracket 9. When the saw disc 16 is subjected to a reaction force that causes the rotating shaft 3 to reverse, the rotating shaft 3 only produces a small reversal angle in the initial stage of reversal. At this time, the base plate 8 and the bracket 9 rotate slightly. The flexible pad 10 on the top of the bracket 9 is squeezed and undergoes elastic deformation. This elastic deformation instantly absorbs the displacement of the small rotation of the base plate 8, compensates for the small fitting gap between the protrusion 23 and the insert plate 27, and ensures that the vertical section 24 of the protrusion 23 can contact the side of the insert plate 27 in time, so that the rigid blocking takes effect before the reversal torque is transmitted to the hydraulic cylinder 11. The material of the flexible pad 10 is not limited to rubber or polyurethane elastomer, but can also be a metal spring washer or an elastic composite material block. In this embodiment, the limiting component also includes a trigger. When the drive source drives the support to move to contact the bottom of the limiting slider, the fluid drive assembly pulls out the locking component in conjunction, allowing the limiting slider to move laterally to avoid the trigger. The support lifts the limiting slider so that its top contacts and supports the trigger. Specifically, when the cutting operation is completed and the equipment needs to be stored and reset, the hydraulic cylinder 219 is activated, driving the push rod 20 to move in the direction of the push rod 5. The movement of the push rod 20 causes the abutment 41 to move horizontally, causing the abutment 41 to move to contact the bottom of the moving block 26. The push rod 20 moves to the contact position and supports the moving block 26; at the same time, when the push rod 20 moves and drives the abutment rod 41 to move, it can also drive the moving rod 40 and piston 39 to move. Under the action of the hose 42, the fluid medium (air) in the housing 34 is drawn in, forcing the piston 35 to move upward and thus forcibly pulling out the plug rod 36 inserted in the socket. With the plug rod 36 pulled out, the restriction on the lateral sliding of the plug plate 27 in the moving block 26 is released; by pulling out the plug rod 36 and releasing the restriction, the equipment can be properly stored and reset. After resetting, the device enters a static storage state. At this time, gravity causes the substrate 8 and the slit component to tend to rotate downwards. A protrusion 23 on the circular plate 21 will contact the top of the insert plate 27. At this time, the abutment 41 contacts the bottom of the moving block 26 to support it and prevent the moving block 26 from moving downwards. Meanwhile, the top of the insert plate 27 is a flat surface without an arc. When the protrusion 23 contacts the flat surface, it cannot generate a force to cause the insert plate 27 to move laterally and retract. Therefore, the insert plate 27 cannot retract to avoid the impact, and the moving block 26 cannot move downwards. In this way, the limiting slider instantly becomes a component that bears the weight of the substrate 8 and the slit component, instead of the hydraulic cylinder 11 bearing the force. This can avoid damage to the hydraulic cylinder 1 from prolonged stress and increase its service life. Specifically, when using this device, the operator moves the equipment to the predetermined cutting position of the bridge expansion joint by pushing the rod 5 and the rollers 7 at the bottom of the base plate 1; Then, the operator starts the motor 13 through the electrical box 6. The output torque of the motor 13 is transmitted to the rotating shaft 15 through the transmission components, driving the saw disc 16 to rotate at high speed. Subsequently, the operator controls the extension and retraction of the hydraulic cylinder 11 on the upright plate 4. The piston rod of the hydraulic cylinder 11 pushes and pulls the bracket 9, forcing the base plate 8 to rotate downward around the rotating shaft 3. The saw disc 16 gradually presses down and contacts the concrete at the bridge expansion joint, starting the cutting operation. During the cutting process, the rotating shaft 3 slowly rotates clockwise with the base plate 8, and the circular plate 21 rotates with the rotating shaft 3. As the saw rotates synchronously, the protrusions 23 on it push the top of the insert plate 27 in sequence, causing the insert plate 27 and the moving block 26 to move downward along the upright 22 at the same time. That is, the protrusions 23 push the insert plate 27 and the moving block 26 downward as a whole to avoid it, while the spring 30 is compressed and stores energy. When a protrusion 23 passes the insert plate 27, the spring 30 immediately releases its potential energy, pushing the moving block 26 upward back to its original position, ready to welcome the next protrusion 23 to pass. This ensures that the saw disc 16 can be pressed down smoothly without being interfered with by the rigid jamming of the restricting parts. During kerfing operations, hard stones or remnants of reinforcing steel bars that are difficult to cut are often embedded inside the concrete. When the saw disc 16 collides rigidly with such hard materials, a huge reaction force is generated. This reaction force forces the rotating shaft 3 to reverse. At this time, the circular plate 21 reverses with the rotating shaft 3, and the vertical section 24 of the protrusion 23 contacts the bottom of the insert plate 27. Since the insert rod 36 is kept inserted in the insertion hole under the preload of the spring 37, the insert plate 27 loses its freedom to retract and avoid lateral movement. The moving block 26 is in a lateral locked state. At the same time, the stop block 29 restricts the moving block 26 from moving upward. Therefore, the reverse... The torque is rigidly blocked at the contact surface between the protrusion 23 and the insert plate 27, and cannot be transmitted to the hydraulic cylinder 11. The hydraulic cylinder 11 is protected from rigid impact, effectively preventing damage to the drive components. At the beginning of the reversal, the rotating shaft 3 only produces a small reversal angle, and the base plate 8 and the bracket 9 rotate slightly. The flexible pad 10 at the top of the bracket 9 is squeezed and undergoes elastic deformation. This deformation instantly compensates for the small fitting gap between the protrusion 23 and the insert plate 27, ensuring that the vertical section 24 can contact the bottom of the insert plate 27 in time, so that the rigid block takes effect before the reaction force is transmitted to the hydraulic cylinder 11, filling the small fitting gap. After the slit cutting is completed, the operator controls hydraulic cylinder 11 to rotate the base plate 8 upwards and reset it. At this time, the operator simultaneously starts hydraulic cylinder 19, which drives push rod 20 to move in the direction of push rod 5. Push rod 20 directly drives the abutment rod 41 to move, so that the abutment rod 41 is positioned to contact the bottom of the moving block 26 and support the moving block 26. At the same time, under the action of moving rod 40, the displacement of push rod 20 and abutment rod 41 will drive piston 39 to move. Under the action of hose 42, the movement of piston 39 causes piston 35 inside housing 34 to move upwards, thereby moving the locking device connected to piston 35 from... When the limit slider is forcibly pulled out, the insertion rod 36 is pulled out, instantly releasing the freedom of the insertion plate 27 to slide laterally within the moving block 26. This transforms the limit slider, which was originally locked in a lateral movement, into an unlocked state where it can move laterally to avoid obstacles. When the hydraulic cylinder 11 rotates the base plate 8 upward to reset, the circular plate 21 rotates clockwise, and the arc-shaped segment 25 of the protrusion 23 rotates and contacts the arc-shaped part 28 at the end of the insertion plate 27. In this way, the insertion plate 27 moves laterally to retract and avoid obstacles, and the spring 23 compresses and stores energy. When the protrusion 23 successfully passes the insertion plate 27, the spring 23 quickly releases its potential energy to push the insertion plate 27 back to its original position. There is no motion interference, and the equipment can be smoothly stored and reset. After resetting, the device enters a static storage state. At this time, gravity causes the substrate 8 and the slit component to tend to rotate downwards. A protrusion 23 on the circular plate 21 contacts the top flat surface of the insert plate 27. Since the abutment 41 has lifted the moving block 26, it blocks the space for its downward displacement. At the same time, the top of the insert plate 27 has no arc part, so it cannot generate a tangential component force to cause the insert plate 27 to move laterally and retract. The insert plate 27 cannot retract to avoid, and the moving block 26 cannot move downwards to avoid. In this way, the limiting slider instantly transforms into a component that bears the weight of the substrate 8 and the slit component. In this way, the hydraulic cylinder 11 is no longer suspended and stretched to bear static tension, which can avoid damage to the hydraulic cylinder 1 from long-term stress and increase its service life.

[0023] In addition, it is readily apparent that all content not described in detail in this specification, except as described above, is prior art known to those skilled in the art.

[0024] The above description is merely a preferred embodiment of the present invention. Any person skilled in the art can modify the present invention or modify it into an equivalent technical solution using the technical solutions described above. Therefore, any simple modifications or equivalent substitutions made based on the technical solutions of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A rapid concrete cutting device for road and bridge expansion joints, comprising a base plate (1), two housings (2), a rotating shaft (3), a vertical plate (4), a position adjustment component, and a cutting component, wherein the two housings (2) are fixedly connected to the top of the base plate (1), the rotating shaft (3) is rotatably connected to the two housings (2), the vertical plate (4) is fixedly connected to the top of the base plate (1), the position adjustment component is connected between the vertical plate (4) and the rotating shaft (3), and the cutting component is connected to the position adjustment component, characterized in that: Both housings (2) are equipped with limiting components inside, the limiting components including limiting sliders and locking components; A state transformation component is provided between the two housings (2), and the state transformation component includes a drive source, a support component and a fluid drive assembly; The drive source is configured to drive the support member to move and link the fluid drive assembly to pull out the locking member, so that the limiting member is locked in the limiting slider through the locking member in the working state to prevent reverse rotation, and is unlocked by pulling out the locking member in the storage state to avoid interference and is supported by the support member to convert the limiting slider into a rigid support position.

2. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 1, characterized in that: The limiting component also includes a trigger and a vertical rod (22). The limiting slider is slidably sleeved on the outside of the vertical rod (22). The locking component is inserted into the limiting slider. The driving source is a hydraulic cylinder (19). The supporting component is a push rod (41). The fluid driving assembly includes a housing (34), a housing (38), and a hose (42). The housing (34) is connected to the limiting slider. The housing (38) is connected to the housing (2). The hose (42) connects the housing (34) and the housing (38). The hydraulic cylinder (19) drives the push rod (20) to move. The push rod (20) drives the push rod (41) to move and moves the piston (39) in conjunction with it. The piston (35) in the housing (34) moves through the hose (42) to pull out the locking component.

3. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 2, characterized in that: The trigger is a circular plate (21), which is fixedly sleeved on the outside of the rotating shaft (3). The circular plate (21) has multiple protrusions (23). The limiting slider is a moving block (26), which is slidably sleeved on the outside of the upright (22). The upright (22) is fixedly embedded in the housing (2). The locking element is a plug rod (36), which is inserted into the insertion hole on the moving block (26). The plug rod (36) is fixedly connected to the piston (35).

4. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 2, characterized in that: The second hydraulic cylinder (19) is fixed on the connecting block (18), and the connecting block (18) is fixed on the base plate (1). The telescopic end of the second hydraulic cylinder (19) is fixed with a push rod (20), which passes through the through groove on the housing (2). The end of the push rod (20) is fixedly connected to the abutment rod (41), and the abutment rod (41) contacts one end of the moving rod (40). The other end of the moving rod (40) is fixedly connected to the second piston (39).

5. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 1, characterized in that: The limiting component also includes a trigger. When the locking component is inserted into the limiting slider, the limiting slider is locked in a horizontal movement. When the trigger rotates, it contacts the limiting slider, and the limiting slider is restricted from moving upward to prevent reversal.

6. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 1, characterized in that: The limiting component also includes a trigger. When the drive source drives the support to move to contact the bottom of the limiting slider, the fluid drive assembly pulls out the locking component in conjunction, the limiting slider can move laterally to avoid the trigger, and the support lifts the limiting slider so that its top contacts and supports the trigger.

7. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 3, characterized in that: The protrusion (23) has a vertical section (24) and an arc section (25); the movable block (26) is slidably fitted with a plate (27), one end of the plate (27) is located between the two protrusions (23), and the other end of the plate (27) is provided with a baffle (31); the plate (27) is provided with a through groove, and the upright (22) passes through the through groove; the upright (22) is fitted with a spring (30) on the outside, and the two ends of the spring (30) are respectively in contact with the bottom of the movable block (26) and the inner wall of the bottom of the shell (2).

8. The rapid concrete cutting device for road and bridge expansion joints according to claim 7, characterized in that: Two pins (32) are fixed on one side of the movable block (26), and the pins (32) pass through the baffle (31); a second spring (33) is sleeved on the outside of the pins (32), one end of the second spring (33) contacts the baffle (31), and the other end contacts the protruding end of the pins (32).

9. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 1, characterized in that: The position adjustment component includes a base plate (8), which is fixedly connected to the first rotating shaft (3). A bracket (9) is fixed on the top of the base plate (8), and a flexible pad (10) is provided on the top of the bracket (9). A hydraulic cylinder (11) is provided on the upright plate (4), and the hydraulic cylinder (11) is hinged to the bracket (9). The slit cutting component includes a motor (13), a support base (14), a rotating shaft (15), and a saw disc (16). The motor (13) is fixed on the base plate (8), and the front end of the rotating shaft (15) is fixed with the saw disc (16). The motor (13) and the rotating shaft (15) are connected through a transmission component.

10. The rapid concrete cutting equipment for road and bridge expansion joints according to claim 1, characterized in that: The bottom of the base plate (1) is fixed with a roller (7), the vertical plate (4) is fixed with a push rod (5) between the base plate (1), and an electrical box (6) is fixed on one side of the vertical plate (4).

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