Expansion joint cutting device

Abstract

The utility model discloses a expansion joint cutting device, which effectively solves the problems of cutting position deviation and cutting tooth breakage; the technical solution is as follows: it comprises a horizontally placed bottom plate, a rotating wheel with an axis arranged front and rear is fixed around the lower end surface of the bottom plate, and a handle is fixed on the right side of the upper end of the bottom plate; the upper end surface of the bottom plate is provided with a through groove penetrating to the lower end surface, a cover body with a lower end opening is arranged on the upper side of the bottom plate, the lower side of the left end of the cover body is hinged with the bottom plate, and the right end of the cover body can swing up and down, and a rotating shaft is arranged in the cover body, and two cutting blades coaxial with the rotating shaft are fixed on the rotating shaft, and there is a gap between the two cutting blades, and the cutting blade can be located on the lower side of the rotating wheel as the cover body moves downward; the utility model can move into the cutting groove under the action of a spring through a limiting plate, and when the limiting plate and the inner side of the cutting blade are placed in the cutting groove at the same time, the bottom plate can be restricted from shaking back and forth, and the problem of broken teeth caused by the outer edge cutting teeth of the cutting blade suddenly colliding with the road surface can also be prevented.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to an expansion joint cutting device. Background Art

[0002] The existing expansion joint cutting method is such as the scheme with the authorization announcement number CN220767665U. When cutting, the driving motor 6 is started, and the driving motor 6 drives the driving block 5 to rotate. The driving block 5 drives the connecting block 8 and the cutting blades 3 on both sides to rotate through the connecting rod 9 to achieve the cutting of the bridge expansion joint. Although this method can achieve cutting, it still has the following problems:

[0003] 1. Since the cutting blade is always located at the bottom, when the motor drives the cutting blade to rotate, the cutting blade contacts the road surface. After starting the motor, since there is no groove limit on the ground, the cutting blade will start suddenly and swing, causing the cutting position to deviate;

[0004] 2. During the forward cutting process of the cutting blade, it is difficult to maintain a straight line due to manual push, resulting in skewed cutting. At the same time, when the cutting is skewed, the cutting teeth of the cutting blade will suddenly collide with the road surface, causing the cutting teeth to break. Summary of the invention

[0005] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an expansion joint cutting device, which effectively solves the problems of cutting position deviation and cutting tooth breakage.

[0006] The technical solution is a expansion joint cutting device, comprising a horizontally placed bottom plate, a rotating wheel arranged front and rear of the axis is fixed around the bottom end surface of the bottom plate, and a handle is fixed on the right side of the upper end of the bottom plate;

[0007] The upper end surface of the bottom plate is provided with a through slot extending to the lower end surface, and a cover body with an opening at the lower end is arranged on the upper side of the bottom plate. The lower side of the left end of the cover body is hinged to the bottom plate, and the right end of the cover body can swing up and down. After the cover body swings downward, the lower end covers the through slot. A rotating shaft is arranged in front and back, and two cutting blades coaxial with the rotating shaft are fixed on the rotating shaft, and there is a gap between the two cutting blades. The cutting blades can be located at the lower side of the rotating wheel as the cover body moves downward;

[0008] A round rod arranged in front of and behind the axis is installed on the lower side of the cover body and on the right side of the through slot. The round rod can rotate around the axis and move up and down. A roller is sleeved on the round rod. The roller is located between the two cutting discs. A limiting disk is fixed on each side of the round rod located on the roller. The cutting disc does not contact the limiting disk. The thickness of the limiting disk is less than that of the cutting disc. The inner end faces of the two limiting disks are flush with the inner end faces of the cutting discs on the corresponding sides.

[0009] When the shaft stops rotating, the cover body swings upward, and the lower side of the cutting blade is located above the lower side of the rotating wheel; when the shaft starts to rotate, the cover body gradually swings downward, and the lower side of the cutting blade moves to the lower side of the rotating wheel. After the cutting blade moves downward, the lower side of the limit plate can be flush with the lower side of the cutting blade.

[0010] An electric cylinder is hinged on each of the front and rear sides of the cover body, and the other end of the electric cylinder is hinged on the upper side of the bottom plate. The electric cylinder can drive the cover body to swing up and down.

[0011] A fixing block is fixed on the right side of each of the front and rear end surfaces of the cover body, a through hole is opened at the upper end of the fixing block, a straight rod is inserted in the through hole, the round rod is rotatably connected to the lower end of the straight rod, a spring is sleeved on the outer edge of the straight rod, one end of the spring is fixed on the fixing block, and the other end of the spring is fixed on the straight rod, and the spring drives the round rod to move up and down through the straight rod.

[0012] The limiting disc is composed of a disc and a plurality of protrusions evenly distributed on the outer circumference, and the outer sides of the protrusions are conical.

[0013] A motor is fixed on the rear end surface of the rotating shaft, and the rear end of the rotating shaft passes through the cover body and is connected to the motor via a coupling.

[0014] The utility model can limit the bottom plate from shaking forwards and backwards when the limit plate and the inner side of the cutting disc are placed in the cutting groove at the same time, thereby preventing the cutting disc and the cutting groove from forming an angle so that the cutting groove is not in a straight line. At the same time, it can also prevent the outer edge cutting teeth of the cutting disc from suddenly colliding with the road surface after deflection, thereby causing the problem of broken teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the front view of the utility model.

[0016] Figure 2 It is a front sectional view of the utility model.

[0017] Figure 3 It is an AA right side sectional view of the present invention. DETAILED DESCRIPTION

[0018] The specific implementation of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0019] Depend on Figures 1 to 3 The utility model comprises a bottom plate 1 placed horizontally, a rotating wheel 2 arranged front and rear of the axis is fixed around the lower end surface of the bottom plate 1, and a handle 3 is fixed on the right side of the upper end of the bottom plate 1;

[0020] A through slot 4 is provided on the upper end surface of the bottom plate 1 and extends to the lower end surface. A cover body 5 with an opening at the lower end is provided on the upper side of the bottom plate 1. The lower side of the left end of the cover body 5 is hinged to the bottom plate 1. The right end of the cover body 5 can swing up and down. After the cover body 5 swings downward, the lower end covers the through slot 4. A rotating shaft 6 is provided in the cover body 5. The axis is arranged front and back. Two cutting blades 7 coaxial with the rotating shaft 6 are fixed on the rotating shaft 6. There is a gap between the two cutting blades 7. The cutting blades 7 can be located at the lower side of the rotating wheel 2 as the cover body 5 moves downward.

[0021] A round rod 8 arranged front and rear of an axis is installed on the lower side of the cover body 5 and located on the right side of the through slot 4. The round rod 8 can rotate around the axis and move up and down. A roller 9 is sleeved on the round rod 8. The roller 9 is located between the two cutting discs 7. The round rod 8 is located on both sides of the roller 9, and a limiting disk 10 is fixed on each side. The cutting disc does not contact the limiting disk 10. The thickness of the limiting disk 10 is less than the thickness of the cutting disc. The inner end faces of the two limiting disks 10 are flush with the inner end faces of the cutting discs on the corresponding sides.

[0022] When the rotating shaft 6 stops rotating, the cover body 5 swings upward, and the lower side of the cutting blade 7 is located on the upper side of the lower side of the rotating wheel 2; when the rotating shaft 6 starts to rotate, the cover body 5 gradually swings downward, and the lower side of the cutting blade 7 moves to the lower side of the rotating wheel 2. After the cutting blade 7 moves downward, the lower side of the limiting plate 10 can be flush with the lower side of the cutting blade 7.

[0023] The cover body 5 is hinged with an electric cylinder 11 at the front and rear sides respectively, and the other end of the electric cylinder 11 is hinged to the upper side of the bottom plate 1. The electric cylinder 11 can drive the cover body 5 to swing up and down.

[0024] A fixing block 12 is fixed to the right side of each of the front and rear end surfaces of the cover body 5. A through hole is opened at the upper end of the fixing block 12, and a straight rod 13 is inserted into the through hole. The round rod 8 is rotatably connected to the lower end of the straight rod 13. A spring is sleeved on the outer edge of the straight rod 13. One end of the spring is fixed on the fixing block 12, and the other end of the spring is fixed on the straight rod 13. The spring drives the round rod 8 to move up and down through the straight rod 13.

[0025] The limiting plate 10 is composed of a circular plate and a plurality of protrusions evenly distributed on the outer circumference, and the outer side of the protrusions is conical.

[0026] A motor 14 is fixed to the rear end surface of the rotating shaft 6 , and the rear end of the rotating shaft 6 passes through the cover body 5 and is connected to the motor 14 via a coupling.

[0027] It is worth mentioning that when the motor 14 starts to start, the electric cylinder 11 starts to drive the cover body 5 to swing downward, and when the motor 14 is turned off, the electric cylinder 11 drives the cover body 5 to move upward.

[0028] Before the utility model is used, the motor 14 is turned off, the cover body 5 is swung to the upper side under the action of the electric cylinder 11, and the lower side of the cutting blade 7 is located on the upper side of the lower side of the roller; it can prevent the cutting blade 7 from colliding with the ground when moving;

[0029] When the utility model is used, the bottom plate 1 is moved to the position where the expansion joint needs to be cut, and the two cutting blades 7 are respectively located above the two cutting positions, and then the motor 14 is started, and the motor 14 drives the cutting blade 7 to rotate. At this time, the electric cylinder 11 drives the cover body 5 to swing downward at the same time, and the cover body 5 drives the cutting blade 7 to swing downward until the cutting blade 7 reaches the cutting depth. After that, the electric cylinder 11 stops, and the motor 14 continues to drive the rotating shaft 6 to rotate so that the cutting blade 7 cuts the road surface, and then pushes the bottom plate 1 to move to the left, and the cutting blade 7 cuts the road surface;

[0030] When the bottom plate 1 moves to the left, the limit plate 10 will move into the cutting groove under the action of the spring. Since the corresponding side limit plate 10 and the inner side of the cutting blade 7 are flush, when the limit plate 10 and the inner side of the cutting blade 7 are placed in the cutting groove at the same time, the bottom plate 1 can be restricted from shaking back and forth, and the cutting groove can be prevented from being not in a straight line due to the angle between the cutting plate and the cutting groove. At the same time, the problem of broken teeth caused by the outer edge cutting teeth of the cutting blade 7 suddenly colliding with the road surface after deflection can also be prevented.

[0031] When the limiting plate 10 is placed in the groove after cutting, the protrusion is inserted into the groove after cutting, which can prevent the problem that the limiting plate 10 cannot enter the groove due to the cutting objects produced after cutting;

[0032] When the cutting is completed, the power is turned off, the rotating shaft 6 stops rotating, and the electric cylinder 11 drives the cover body 5 to swing upward at the same time, and the lower side of the cutting blade 7 moves to the upper side of the lower side of the roller again, so as to facilitate the removal of the cutting blade 7.

[0033] 1. When the motor 14 starts to start, the electric cylinder 11 starts to drive the cover 5 to swing downward, so that the cutting blade 7 will not contact the ground when it just rotates, thus preventing the cutting blade 7 from tilting after starting;

[0034] When the motor 14 is turned off, the electric cylinder 11 simultaneously drives the cover body 5 to move upwards and move out of the cut groove in time, thereby preventing the cutting blade 7 from being damaged by moving the bottom plate 1 before the cutting blade 7 is moved out of the groove.

[0035] 2. In the utility model, the limit plate 10 will move into the cutting groove under the action of the spring. When the limit plate 10 and the inner side of the cutting disc 7 are placed in the cutting groove at the same time, the bottom plate 1 can be restricted from shaking back and forth, thereby preventing the cutting disc from generating an angle with the cutting groove so that the cutting groove is not in a straight line. At the same time, it can also prevent the outer edge cutting teeth of the cutting disc 7 from suddenly colliding with the road surface after deflection, thereby causing the problem of broken teeth.

[0036] 3. The utility model can prevent the problem that the limiting disk 10 cannot enter the groove due to the cut objects after cutting, after the limiting disk 10 is inserted into the groove after cutting, through the design of the protrusion.

Claims

1. An expansion joint cutting device, characterized in that: A bottom plate (1) is placed horizontally, a rotating wheel (2) arranged in front and rear of the axis is fixed to each of the four sides of the lower end surface of the bottom plate (1), and a handle (3) is fixed to the right side of the upper end of the bottom plate (1); The upper end surface of the bottom plate (1) is provided with a through slot (4) extending through the lower end surface. A cover body (5) with an open lower end is arranged on the upper side of the bottom plate (1). The lower side of the left end of the cover body (5) is hinged to the bottom plate (1). The right end of the cover body (5) can swing up and down. After the cover body (5) swings downward, the lower end covers the through slot (4). A rotating shaft (6) is arranged in a front-to-back direction. Two cutting blades (7) coaxial with the rotating shaft (6) are fixed on the rotating shaft (6). There is a gap between the two cutting blades (7). The cutting blades (7) can be located on the lower side of the rotating wheel (2) as the cover body (5) moves downward. A round rod (8) arranged in front and behind the axis is installed on the lower side of the cover body (5) and located on the right side of the through groove (4). The round rod (8) can rotate around the axis and move up and down. A roller (9) is sleeved on the round rod (8). The roller (9) is located between the two cutting blades (7). A limiting plate (10) is fixed on each side of the round rod (8) located on the roller (9). The cutting blades do not contact the limiting plate (10). The thickness of the limiting plate (10) is smaller than that of the cutting blades. The inner end surfaces of the two limiting plates (10) are flush with the inner end surfaces of the cutting blades on the corresponding sides. When the rotating shaft (6) stops rotating, the cover body (5) swings upward, and the lower side of the cutting blade (7) is located above the lower side of the rotating wheel (2); when the rotating shaft (6) starts rotating, the cover body (5) gradually swings downward, and the lower side of the cutting blade (7) moves to the lower side of the rotating wheel (2). After the cutting blade (7) moves downward, the lower side of the limiting plate (10) can be flush with the lower side of the cutting blade (7).

2. The expansion joint cutting device according to claim 1, characterized in that: An electric cylinder (11) is hingedly connected to each of the front and rear sides of the cover body (5); the other end of the electric cylinder (11) is hingedly connected to the upper side of the bottom plate (1); and the electric cylinder (11) can drive the cover body (5) to swing up and down.

3. The expansion joint cutting device according to claim 1, characterized in that: A fixing block (12) is fixed to the right side of each of the front and rear end surfaces of the cover body (5). A through hole is formed at the upper end of the fixing block (12). A straight rod (13) is inserted into the through hole. The round rod (8) is rotatably connected to the lower end of the straight rod (13). A spring is sleeved on the outer edge of the straight rod (13). One end of the spring is fixed to the fixing block (12), and the other end of the spring is fixed to the straight rod (13). The spring drives the round rod (8) to move up and down via the straight rod (13).

4. The expansion joint cutting device according to claim 1, characterized in that: The limiting disk (10) is composed of a disk and a plurality of protrusions evenly distributed on the outer circumference, and the outer sides of the protrusions are conical.

5. The expansion joint cutting device according to claim 1, characterized in that: A motor (14) is fixed to the rear end surface of the rotating shaft (6), and the rear end of the rotating shaft (6) passes through the cover body (5) and is connected to the motor (14) via a coupling.

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