Adjustable asphalt pavement crack expanding machine

Abstract

The utility model relates to the technical field of pavement repair and maintenance, in particular to an adjustable asphalt pavement crack expanding machine, which comprises a cart connected with a lifting support in a sliding manner, an air cylinder mounted on the cart on one side of the lifting support and used for driving the lifting support to lift, and an overturning roller, rotating shafts are rotationally connected to the lifting supports on the two sides of the overturning roller and can slide up and down in the height direction of the lifting supports, the reciprocating lead screws drive the rotating shafts at the front end of the cart to reciprocate up and down when rotating in the internal threads, and the rotating shafts move downwards to push the grinding roller to move downwards to grind the side wall of the gap; the rotating shaft moves upwards to drive the grinding roller to synchronously move upwards to the position above the road surface, the grinding roller can grind the side walls of the two sides of the gap after gap expansion to form groove-shaped structures distributed at equal intervals in cooperation with pushing of the cart by the user, the contact face between the repairing agent and the side walls of the gap is enlarged, and the repairing agent and the side walls of the gap are connected more tightly; and the crack repairing quality is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of road surface repair and maintenance, in particular to an adjustable asphalt road surface crack expander. Background Art

[0002] Pavement crack expander is a device used to maintain pavement diseases. When the pavement cracks due to address settlement or pressure, it is necessary to use the expander to widen the smaller cracks so that the cracks can be filled with patching agent to repair the pavement.

[0003] Existing crack expanders generally expand the pavement by driving the blade to rotate at high speed. The cut is smooth and flat, resulting in a smaller contact area between the patch and the side wall of the pavement crack, which is not conducive to the close bonding of the patch and the crack side wall, affecting the pavement repair effect. For this reason, we propose an adjustable asphalt pavement crack expander. Utility Model Content

[0004] One of the technical problems to be solved by this application is that the existing crack expansion machines generally expand the road surface by driving the blade to rotate at high speed. The incision is smooth and flat, resulting in a small contact area between the repair agent and the side wall of the road surface crack, which is not conducive to the close bonding of the repair agent and the crack side wall, affecting the road surface repair effect.

[0005] To solve the above technical problems, the present application provides an adjustable asphalt pavement crack expander, comprising a cart slidably connected to a lifting bracket, the cart further being fixedly connected to a cylinder, the cylinder output end being connected to the lifting bracket for driving the lifting bracket to move up and down, and further comprising:

[0006] A turning roller, both ends of which are rotatably connected to the lifting bracket, and a rotating shaft is rotatably connected to the lifting bracket on both sides of the turning roller, and the rotating shaft can slide down along the height direction of the lifting bracket, and the two rotating shafts are connected by a transmission structure, and the middle sections of the two rotating shafts are fixedly connected to the gap expansion blades;

[0007] Two grinding rollers, the two grinding rollers are symmetrically mounted on both sides of the expanding blade located at the front end of the cart, and the grinding rollers are fixed to the rotating shaft;

[0008] A motor, the motor being fixedly mounted on the upper front surface of the lifting bracket, the output end of the motor being fixedly connected to a telescopic rod, the bottom end of the telescopic rod being fixedly connected to a reciprocating screw, the threaded section of the reciprocating screw being sleeved with an inner screw ring fixed to the lifting bracket, a bevel gear set being mounted between the bottom end of the inner screw ring and the rotating shaft below it;

[0009] The lever is arranged between the two rotating shafts, the two ends of the lever are respectively rotatably connected to the two rotating shafts, and the middle section of the lever vertically passes through the flip roller and is fixedly connected to the flip roller.

[0010] Preferably, the transmission structure includes two sprockets fixedly mounted on the rotating shaft, the same chain is sleeved on the two sprockets, and the sprockets are meshed and transmission-connected with the chain.

[0011] Preferably, both sides of the middle section of the chain are provided with limiting buckles with a U-shaped structure, the limiting buckles are made of elastic material, and both ends of the limiting buckles are fixedly connected to the outer wall of the turning roller.

[0012] Preferably, the telescopic rod includes a sliding rod with a prismatic structure, the top of the sliding rod is fixedly connected to the output end of the motor, the bottom of the sliding rod is provided with a sliding sleeve adapted to the sliding rod, and the bottom end of the sliding sleeve is fixedly connected to the reciprocating screw rod.

[0013] Preferably, the length of the reciprocating screw thread section is smaller than the length of the sliding path of the rotating shaft along the height direction of the lifting bracket.

[0014] Preferably, a connecting piece is sleeved on the circumferential side of the bevel gear set, the vertical section of the connecting piece is sleeved on the rotating shaft and is rotatably connected to the rotating shaft, and the horizontal section of the connecting piece is sleeved on the bottom end of the reciprocating screw and is rotatably connected to the reciprocating screw.

[0015] Preferably, the width of the expansion blade at the rear end of the cart is set to be smaller than the width of the expansion blade at the front end of the cart, and the diameter of the expansion blade at the rear end is set to be larger than the diameter of the expansion blade at the front end of the cart.

[0016] The utility model has at least the following beneficial effects:

[0017] 1. When the reciprocating screw rotates in the internal thread, it drives the shaft at the front end of the cart to move back and forth. The shaft moves downward, pushing the grinding roller downward to grind the side walls of the gap, while the shaft moves upward, driving the grinding roller to move upward to above the road surface. As the user pushes the cart to move, the grinding roller will grind the side walls of the gap on both sides after the gap is expanded to form an equidistant groove structure, thereby increasing the contact surface between the repair agent and the side walls of the crack, making the connection between the repair agent and the side walls of the crack tighter, and greatly improving the quality of the crack repair;

[0018] 2. The width of the expansion blade at the rear end of the cart is set to be narrower and the diameter is set to be larger than the diameter of the expansion blade at the front end of the cart. When the expansion blade at the rear end of the cart is pushed downward by the lever, multiple discontinuous grooves can be opened on the bottom wall of the gap, further increasing the contact area between the repair agent and the inner wall of the groove, thereby improving the stability of the combination of the repair agent and the road surface. Brief Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0020] Figure 2 For the present utility model Figure 1 The enlarged view of the partial details at position A in the present utility model;

[0021] Figure 3 It is a schematic diagram of the internal structure of the lifting bracket of the present utility model;

[0022] Figure 4 It is a schematic diagram of the installation structure of the bevel gear set and the connecting piece of the present utility model;

[0023] Figure 5 It is a schematic diagram of the installation of the transmission structure of the present utility model;

[0024] Figure 6 It is a schematic diagram of the connection structure between the crack widening blade and the rotating shaft of the present utility model.

[0025] In the figure: 1, trolley; 2, lifting bracket; 3, cylinder; 4, turning roller; 5, rotating shaft; 6, sprocket; 7, chain; 8, limit buckle; 9, crack widening blade; 10, grinding roller; 11, motor; 12, telescopic rod; 13, reciprocating lead screw; 14, internal thread ring; 15, bevel gear set; 16, connecting piece; 17, lever. Detailed Description of the Preferred Embodiment

[0026] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Embodiment 1

[0028] Please refer to Figures 1-5 , the present utility model provides a technical solution:

[0029] An adjustable asphalt pavement crack widening machine, including a trolley 1 slidably connected with a lifting bracket 2, and a cylinder 3 is also fixedly connected to the trolley 1. The output end of the cylinder 3 is connected to the lifting bracket 2 for driving the lifting bracket 2 to lift, and further includes:

[0030] A turning roller 4 rotatably connected to both ends of the lifting bracket 2, and a rotating shaft 5 is rotatably connected to the lifting bracket 2 on both sides of the turning roller 4. The rotating shaft 5 can slide up and down along the height direction of the lifting bracket 2. The two rotating shafts 5 are connected by a transmission structure, and a crack widening blade 9 is fixedly connected to the middle section of the two rotating shafts 5;

[0031] Two grinding rollers 10 symmetrically mounted on both sides of the seam expanding blade 9 at the front end of the cart 1 are symmetrically mounted on both sides of the seam expanding blade 9 at the front end of the cart 1, and the grinding rollers 10 are fixed to the rotating shaft 5;

[0032] A motor 11 is fixedly mounted on the upper front surface of the lifting bracket 2. The output end of the motor 11 is fixedly connected to a telescopic rod 12. The bottom end of the telescopic rod 12 is fixedly connected to a reciprocating screw 13. The threaded section of the reciprocating screw 13 is sleeved with an internal screw ring 14 fixed to the lifting bracket 2. A bevel gear set 15 is installed between the bottom end of the internal screw ring 14 and the rotating shaft 5 below it.

[0033] A lever 17 is provided between the two rotating shafts 5, and both ends of the lever 17 are retractable. Both ends of the lever 17 are rotatably connected to the two rotating shafts 5, and the middle section of the lever 17 vertically passes through the turning roller 4 and is fixedly connected to the turning roller 4; and further includes:

[0034] The transmission structure includes two sprockets 6 fixedly mounted on the two rotating shafts 5. The same chain 7 is sleeved on the two sprockets 6. The sprockets 6 and the chain 7 are meshed and connected to each other so that when one of the rotating shafts 5 rotates, the other rotating shaft 5 can be driven to rotate synchronously.

[0035] Both sides of the middle section of the chain 7 are sleeved with a U-shaped limit buckle 8, which is made of elastic material. Both ends of the limit buckle 8 are fixedly connected to the outer wall of the turning roller 4. The limit buckle 8 made of elastic material is used to tighten the chain 7 so that the chain 7 can always fit with the sprocket 6 during the transmission process.

[0036] The telescopic rod 12 includes a prismatic sliding rod, the top of which is fixedly connected to the output end of the motor 11, the bottom of which is provided with a sliding sleeve adapted to the sliding rod, and the bottom of the sliding sleeve is fixedly connected to the reciprocating screw 13; and furthermore, the length of the threaded section of the reciprocating screw 13 is less than the length of the sliding path of the rotating shaft 5 along the height direction of the lifting bracket 2;

[0037] A connecting piece 16 is sleeved on the circumference of the bevel gear set 15 . The vertical section of the connecting piece 16 is sleeved on the rotating shaft 5 and is rotatably connected to the rotating shaft 5 . The horizontal section of the connecting piece 16 is sleeved on the bottom end of the reciprocating screw rod 13 and is rotatably connected to the reciprocating screw rod 13 .

[0038] In use, the overall structure is transported to the asphalt pavement to be repaired by the trolley 1, and the position of the trolley 1 is adjusted so that the slot-expanding blade 9 moves above the pavement crack. Then, the motor 11 is started to drive the reciprocating lead screw 13 to rotate. The bevel gear set 15 arranged between the bottom end of the reciprocating lead screw 13 and the rotating shaft 5 drives the rotating shaft 5 to rotate, driving the slot-expanding blade 9 to rotate at a high speed. Then, the air cylinder 3 is used to push the lifting bracket 2 to drive the slot-expanding blade 9 to move down and fit with the pavement, so as to expand the pavement crack. Since the reciprocating lead screw 13 is screwed with the internal thread ring 14 fixed on the lifting bracket 2, when the reciprocating lead screw 13 rotates, it can push the rotating shaft 5 installed at the front end of the trolley 1 to slide up and down reciprocally under the action of the thread. When the rotating shaft 5 at the front end of the trolley 1 moves down, it can push the grinding roller 10 fixed on the rotating shaft 5 to move down. After the grinding roller 10 moves down to fit with the side wall of the crack, it grinds the side wall of the crack by its own rotation. When the rotating shaft 5 at the front end of the trolley 1 moves up, the grinding roller 10 synchronously moves up above the pavement. Cooperating with the user to push the trolley 1 to move, multiple equally spaced groove-shaped structures can be formed on both sides of the expanded crack by the grinding roller 10, so as to increase the contact surface between the subsequent repair agent for filling the crack and the crack side wall, make the connection between the repair agent and the crack side wall closer and more stable, and greatly improve the quality of crack repair;

[0039] When the rotating shaft 5 located at the front end of the trolley 1 slides upward, it will drive the end of the lever 17 connected to the rotating shaft 5 to move up synchronously, thereby driving the lever 17 to rotate around the turning roller 4. At this time, the rotating shaft 5 located at the rear end of the trolley 1 slides downward, driving the slot-expanding blade 9 installed on the rotating shaft 5 at the rear end of the trolley 1 to move downward. At this time, the slot-expanding blade 9 at the rear end of the trolley 1 is used to expand the crack to ensure that the expansion depth meets the requirements.

[0040] Embodiment 2

[0041] Please refer to Figure 6 This utility model provides a technical solution:

[0042] Different from Embodiment 1, this solution provides another implementation manner of the adjustable asphalt pavement crack slot-expanding machine:

[0043] The adjustable asphalt pavement crack slot-expanding machine includes a trolley 1 with a lifting bracket 2 slidably connected thereto. The trolley 1 is also fixedly connected with an air cylinder 3. The output end of the air cylinder 3 is connected to the lifting bracket 2 for driving the lifting bracket 2 to lift and lower. It also includes:

[0044] A turning roller 4 rotatably connected to the lifting bracket 2 at both ends. On both sides of the turning roller 4, a rotating shaft 5 is rotatably connected to the lifting bracket 2. The rotating shaft 5 can slide up and down along the height direction of the lifting bracket 2. The two rotating shafts 5 are connected by a transmission structure. On the middle sections of the two rotating shafts 5, slot-expanding blades 9 are fixedly connected;

[0045] Two grinding rollers 10 symmetrically installed on both sides of the slit widening blade 9 at the front end of the trolley 1 are symmetrically installed on both sides of the slit widening blade 9 at the front end of the trolley 1, and the grinding rollers 10 are fixed to the rotating shaft 5;

[0046] A motor 11 fixedly installed on the upper surface of the front end of the lifting bracket 2, the output end of the motor 11 is fixedly connected with a telescopic rod 12, the bottom end of the telescopic rod 12 is fixedly connected with a reciprocating lead screw 13, and an internal thread ring 14 fixed to the lifting bracket 2 is sleeved on the threaded section of the reciprocating lead screw 13. A bevel gear set 15 is installed between the bottom end of the internal thread ring 14 and the rotating shaft 5 below it;

[0047] A lever 17 arranged between the two rotating shafts 5, both ends of the lever 17 are telescopic, both ends of the lever 17 are rotatably connected to the two rotating shafts 5 respectively, and the middle section of the lever 17 vertically penetrates through the turning roller 4 and is fixedly connected with the turning roller 4; Further included are:

[0048] The width of the slit widening blade 9 at the rear end of the trolley 1 is set to be smaller than the width of the slit widening blade 9 at the front end of the trolley 1, and the diameter of the slit widening blade 9 at the rear end is set to be larger than the diameter of the slit widening blade 9 at the front end of the trolley 1.

[0049] Since the slit widening blade 9 at the rear end of the trolley 1 is set to be narrower, and the diameter of the slit widening blade 9 at the rear end of the trolley 1 is set to be larger than the diameter of the slit widening blade 9 installed at the front end of the trolley 1, when the slit widening blade 9 at the rear end of the trolley 1 is pushed by the lever 17 to slide downward, a plurality of discontinuous grooves can be opened on the bottom wall of the slit, further increasing the contact surface between the repair agent and the inner wall of the groove, so as to improve the stability of the combination of the repair agent and the road surface.

[0050] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An adjustable asphalt pavement crack widening machine, comprising a trolley (1) slidably connected with a lifting bracket (2), a cylinder (3) is further fixedly connected to the trolley (1), and an output end of the cylinder (3) is connected to the lifting bracket (2) for driving the lifting bracket (2) to lift, characterized in that: Also included are: A turning roller (4), both ends of the turning roller (4) are rotatably connected to the lifting bracket (2), a rotating shaft (5) is rotatably connected to the lifting bracket (2) on both sides of the turning roller (4), the rotating shaft (5) can slide downward along the height direction of the lifting bracket (2), the two rotating shafts (5) are connected by a transmission structure, and a gap expanding blade (9) is fixedly connected to the middle section of the two rotating shafts (5); Two grinding rollers (10), the two grinding rollers (10) are symmetrically mounted on both sides of the gap expanding blade (9) located at the front end of the cart (1), and the grinding rollers (10) are fixed to the rotating shaft (5); A motor (11), the motor (11) is fixedly mounted on the upper surface of the front end of the lifting bracket (2), the output end of the motor (11) is fixedly connected to a telescopic rod (12), the bottom end of the telescopic rod (12) is fixedly connected to a reciprocating screw (13), the threaded section of the reciprocating screw (13) is sleeved with an inner screw ring (14) fixed to the lifting bracket (2), and a bevel gear set (15) is installed between the bottom end of the inner screw ring (14) and the rotating shaft (5) below it; A lever (17), wherein the lever (17) is arranged between the two rotating shafts (5), the two ends of the lever (17) are respectively rotatably connected to the two rotating shafts (5), and the middle section of the lever (17) vertically passes through the turning roller (4) and is fixedly connected to the turning roller (4).

2. The adjustable asphalt pavement crack widening machine according to claim 1, characterized in that: The transmission structure comprises two sprockets (6) fixedly mounted on the rotating shafts (5); a same chain (7) is sleeved on the two sprockets (6); and the sprockets (6) and the chain (7) are meshed and connected to each other for transmission.

3. The adjustable asphalt pavement crack expander according to claim 2, characterized in that: Both sides of the middle section of the chain (7) are sleeved with a U-shaped limit buckle (8), the limit buckle (8) is made of elastic material, and both ends of the limit buckle (8) are fixedly connected to the outer wall of the turning roller (4).

4. The adjustable asphalt pavement crack expander according to claim 3, characterized in that: The telescopic rod (12) includes a slide rod with a prismatic structure, the top end of the slide rod is fixedly connected to the output end of the motor (11), the bottom end of the slide rod is provided with a sliding sleeve adapted to the slide rod, and the bottom end of the sliding sleeve is fixedly connected to the reciprocating screw rod (13).

5. The adjustable asphalt pavement crack widening machine according to claim 4, characterized in that: The length of the threaded section of the reciprocating screw rod (13) is less than the length of the sliding path of the rotating shaft (5) along the height direction of the lifting bracket (2).

6. The adjustable asphalt pavement crack widening machine according to claim 5, characterized in that: A connecting piece (16) is sleeved on the circumferential side of the bevel gear set (15); a vertical section of the connecting piece (16) is sleeved on the rotating shaft (5) and is rotatably connected to the rotating shaft (5); and a horizontal section of the connecting piece (16) is sleeved on the bottom end of the reciprocating screw (13) and is rotatably connected to the reciprocating screw (13).

7. The adjustable asphalt pavement crack widening machine according to claim 6, wherein: The width of the expanding blade (9) located at the rear end of the cart (1) is set to be smaller than the width of the expanding blade (9) located at the front end of the cart (1), and the diameter of the expanding blade (9) located at the rear end is set to be larger than the diameter of the expanding blade (9) located at the front end of the cart (1).

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