Planing and milling device for repairing concrete pavement

Abstract

The utility model provides a planing and milling device for concrete pavement patching, which relates to the technical field of concrete planing and milling devices and comprises an active driving shaft and two planing and milling wheels, and the active driving shaft is symmetrically sleeved with the two planing and milling wheels; a small-diameter retaining ring, a large-diameter retaining ring and a protective ring which are sequentially embedded from inside to outside are welded to the annular end face of the outer side of the planing and milling wheel, and a circle of six-edge inserting shaft which is pushed and positioned through a spring is installed on the small-diameter retaining ring and the large-diameter retaining ring in a penetrating and sliding mode; the protruding part of the head end of the circle of six-edge inserting shaft is matched with the end part of the active driving shaft in an inserting manner; a cover plate is welded and plugged at the open end of the protective ring, and a fence ring is welded to the outer side of the center of the cover plate. Through a circle of crank sliding block mechanism, the loosening and unlocking operation of the planing and milling wheel can be efficiently and conveniently completed at a time only through the simple operation of positively twisting the star-shaped driving frame, operation and use are easy, convenient and time-saving, and the dismounting efficiency of the planing and milling wheel which is pulled up at intervals is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of concrete milling devices, and in particular to a milling device for repairing concrete pavements. Background Technology

[0002] There are many methods for repairing concrete pavements, among which milling is an important preliminary step. Milling equipment for concrete pavement repair is used when performing milling operations.

[0003] In existing milling machines, the milling wheels are mostly fixed to the drive shaft by nuts. To ensure the locking stability of the milling wheels and increase the locking torque of the nuts, the nuts are mostly made of large diameter. However, the torque of turning large-diameter nuts is large, and the tightening and loosening operation is relatively laborious and inconvenient. This means that when disassembling, repairing or replacing the milling wheels, it is necessary to use external force-applying tools, such as wrenches with long lever arms, to loosen the nuts. The additional operation of adapting to external force-applying tools and using external tools to loosen the nuts is more troublesome and inconvenient, which indirectly reduces the disassembly efficiency of the milling wheels. Utility Model Content

[0004] In view of this, the present invention provides a milling device for repairing concrete pavement, in order to solve the problem that when disassembling, repairing or replacing milling wheels, it is necessary to use external force-applying tools such as wrenches with long lever arms to tighten or loosen nuts, which is troublesome and inconvenient and indirectly reduces the disassembly and assembly efficiency of milling wheels.

[0005] The technical solution proposed by this utility model is: a milling device for repairing concrete pavement, specifically including an active drive shaft and milling wheels, wherein two milling wheels are symmetrically mounted on the active drive shaft;

[0006] The outer annular end face of the milling wheel is welded with a small-diameter retaining ring, a large-diameter retaining ring, and a protective ring arranged in an inner-outer sequence. A hexagonal insert shaft, positioned by spring push, is slidably mounted through the small-diameter and large-diameter retaining rings. The protruding part of the first end of the hexagonal insert shaft is inserted into the end of the drive shaft. A cover plate is welded to the open end of the protective ring. A retaining ring is welded to the outer side of the center part of the cover plate. A star-shaped drive frame is rotatably mounted in the opening of the protective ring. A short rotating shaft is welded to the center of the star-shaped drive frame. The short rotating shaft is rotatably engaged with the center position of the cover plate. A plum blossom knob is welded to the first end of the short rotating shaft. The plum blossom knob is hidden inside the retaining ring. A connecting rod is rotatably connected between a ring of drive rods supported radially on the star-shaped drive frame and a ring of hexagonal insert shafts.

[0007] Furthermore, the tail end of the connecting rod is rotatably connected to the head end of the drive rod, and its head end is rotatably connected to the tail end of the hexagonal insert shaft.

[0008] Furthermore, a limiting ring is symmetrically fixedly mounted on the active drive shaft between the two milling wheels, with the opposite side of the two milling wheels abutting against the two limiting rings.

[0009] Furthermore, the outer periphery of the milling wheel is welded with multiple rings of milling teeth, and a strip-shaped drive groove is formed on the inner periphery of its central shaft hole.

[0010] Two rings of keyways are symmetrically opened on the active drive shaft. The two rings of strip drive grooves on the two milling wheel center shaft holes correspond to the two rings of keyways in terms of position, and the two are connected to form two complete rings of strip keyways. Two rings of flat keys are slidably inserted in the two rings of strip keyways.

[0011] Furthermore, it also includes a U-shaped transmission box and a trapezoidal reduction gearbox. The drive shaft is rotatably mounted on the bottom part of the U-shaped transmission box, and the trapezoidal reduction gearbox is welded to the top of the U-shaped transmission box. The drive shaft is driven to rotate by a hydraulic drive mechanism set inside the U-shaped transmission box and the trapezoidal reduction gearbox.

[0012] Furthermore, a mounting plate is welded to the top of the trapezoidal gearbox, and the milling device is fixedly connected to the front end of the excavator arm through the mounting plate.

[0013] Furthermore, two high-pressure oil pipes are connected to the side wall of the trapezoidal gearbox. The first end of the two high-pressure oil pipes is connected to the hydraulic drive mechanism, and the second end is connected to the hydraulic power system on the excavator.

[0014] The milling device for repairing concrete pavement provided by this utility model has the following beneficial effects:

[0015] 1. Through a crank-slider mechanism, this utility model only requires a simple operation of turning the star-shaped drive frame in the forward direction to complete the loosening and unlocking of the milling wheel in one go, which is efficient and convenient. Compared with the existing technology of using a large-diameter nut to lock and position the milling wheel, it can save the trouble of needing to use an external force-applying tool (such as a long lever arm wrench) and operating the external force-applying tool to twist and loosen the large-diameter nut with a large locking torque. The operation is simple and time-saving, which helps to improve the disassembly efficiency of the milling wheel.

[0016] Second, the cover plate and the protective ring together form a closed cover, which can shield the crank-slider mechanism inside, preventing the crank-slider mechanism from being directly exposed to the milling and crushing working environment without shielding protection, which would easily cause concrete fragments to fly off and get stuck between them, thus helping to ensure the normal and effective implementation of its efficient unlocking function for the milling wheel.

[0017] Third, the plum blossom knob is built into the retaining ring, which avoids the plum blossom knob being directly exposed to the milling and breaking working environment without shielding protection. It is not easy for the plum blossom knob to collide with the concrete road surface or other obstacles encountered during the milling operation. The impact of the obstacle will drive it to twist, causing the star-shaped drive frame to be driven to twist as well. This will pull the hexagonal insert shaft away from the active drive shaft, release the positioning effect on the milling wheel, and cause the milling wheel to be accidentally mis-locked and fall off the active drive shaft, affecting the normal and effective implementation of the milling operation. The cover has the same effect on the crank-slider mechanism. In this way, the combined use of the cover and the retaining ring can ensure the positioning stability of the hexagonal insert shaft on the milling wheel. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0019] The accompanying drawings described below are only related to some embodiments of the present invention and are not intended to limit the scope of the present invention.

[0020] In the attached diagram:

[0021] Figure 1 A schematic diagram of the overall structure of this utility model is shown;

[0022] Figure 2 A schematic diagram of the internal structure of the protective ring in this utility model is shown in half section.

[0023] Figure 3 This utility model illustrates Figure 2 Enlarged structural diagram of section A;

[0024] Figure 4 A schematic diagram showing the disassembled state of the milling wheel in this utility model is provided.

[0025] Figure 5 A schematic diagram of the internal structure of the protective ring in this utility model is shown;

[0026] Figure 6 The diagram shows the disassembled state of the hexagonal insert shaft and the star-shaped drive frame in this utility model.

[0027] List of reference numerals in the attached diagram:

[0028] 1. U-shaped transmission box;

[0029] 2. Trapezoidal gearbox; 201. High-pressure oil pipe; 202. Mounting plate;

[0030] 3. Milling wheel; 301. Planing teeth; 302. Small diameter retaining ring; 303. Large diameter retaining ring; 304. Protective ring; 305. Cover plate; 3051. Enclosure ring; 306. Hexagonal insert shaft; 307. Strip drive groove;

[0031] 4. Star-shaped drive frame; 401. Short rotating shaft; 402. Plum blossom knob; 403. Connecting rod;

[0032] 5. Active drive shaft; 501. Keyway; 502. Flat key; 503. Limiting ring. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the described embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0034] Please refer to Figures 1 to 6 Example 1:

[0035] This embodiment proposes a milling device for repairing concrete pavement, including an active drive shaft 5 and milling wheels 3, with two milling wheels 3 symmetrically mounted on the active drive shaft 5.

[0036] On the outer annular end face of the milling wheel 3, a small-diameter retaining ring 302, a large-diameter retaining ring 303, and a protective ring 304 are welded together in an inner-outer sequence. A hexagonal insert shaft 306, which is positioned by spring push, is slidably mounted through the small-diameter retaining ring 302 and the large-diameter retaining ring 303. The protruding part of the first end of the hexagonal insert shaft 306 is inserted into the end of the drive shaft 5. A cover plate 305 is welded to and sealed the open end of the protective ring 304. The outer side of the center part of the cover plate 305 is... A protective ring 3051 is welded on, and a star-shaped drive frame 4 is rotatably installed in the opening of the protective ring 304. A short rotating shaft 401 is welded at the center of the star-shaped drive frame 4. The short rotating shaft 401 is rotatably engaged with the center of the cover plate 305. A plum blossom knob 402 is welded to the first end of the short rotating shaft 401. The plum blossom knob 402 is hidden inside the protective ring 3051. A ring of driving rods that are supported radially on the star-shaped drive frame 4 is rotatably connected to a ring of hexagonal insert shafts 306 by a ring of connecting rods 403.

[0037] Preferably, the tail end of the connecting rod 403 is rotatably connected to the head end of the drive rod, and its head end is rotatably connected to the tail end of the hexagonal insert shaft 306.

[0038] Preferably, a limiting ring 503 is symmetrically fixedly mounted on the active drive shaft 5 between the two milling wheels 3, and the opposite side of the two milling wheels 3 abuts against the two limiting rings 503.

[0039] Preferably, the outer periphery of the milling wheel 3 is welded with multiple rings of milling teeth 301, and a ring of strip-shaped drive groove 307 is formed on the inner periphery of its central shaft hole;

[0040] Two rings of keyways 501 are symmetrically provided on the active drive shaft 5. The two rings of strip drive grooves 307 on the central shaft holes of the two milling wheels 3 correspond to the positions of the two rings of keyways 501, and the two are connected to form two complete rings of strip keyways. Two rings of flat keys 502 are slidably inserted in the two rings of strip keyways.

[0041] Implementation 2: This embodiment is based on Implementation 1, but with the following additions:

[0042] This embodiment also includes a U-shaped transmission box 1 and a trapezoidal reduction gearbox 2. The active drive shaft 5 is rotatably mounted on the bottom side of the U-shaped transmission box 1. The trapezoidal reduction gearbox 2 is welded to the top of the U-shaped transmission box 1. The active drive shaft 5 is driven to rotate by a hydraulic drive mechanism located inside the U-shaped transmission box 1 and the trapezoidal reduction gearbox 2.

[0043] Preferably, a mounting plate 202 is welded to the top of the trapezoidal gearbox 2, and the entire milling device is fixedly connected to the front end of the excavator arm through the mounting plate 202.

[0044] Preferably, two high-pressure oil pipes 201 are connected to the side wall of the trapezoidal gearbox 2. The first end of the two high-pressure oil pipes 201 is connected to the hydraulic drive mechanism, and the second end is connected to the hydraulic power system on the excavator.

[0045] The following section provides a detailed explanation of the working principles, specific details, implementation steps, functions and interrelationships of each feature, and their roles in realizing this technical solution:

[0046] It is worth noting that the installation position relationship of the hydraulic drive mechanism in the U-shaped transmission box 1 and the trapezoidal reduction box 2, its transmission connection relationship with the active drive shaft 5, and its working principle are all existing technologies for those in the field of equipment installation, design, commissioning and technical transformation, and therefore will not be elaborated here.

[0047] The hydraulic drive mechanism is connected to the hydraulic power system on the excavator through two high-pressure oil pipes 201. The hydraulic drive mechanism provides driving force through the hydraulic power system and drives the drive shaft 5 and the two milling wheels 3 to rotate. In use, the excavator equipped with the milling device is moved to the concrete road surface to be repaired. Then, the excavator's boom lowers the milling device against the concrete road surface, and the hydraulic power system of the excavator drives the drive shaft 5 and the two milling wheels 3 to rotate. When the two milling wheels 3 are driven to rotate, they can mill and break the concrete road surface through the evenly distributed multiple rings of milling teeth 301. During the milling process, the boom should be manipulated to swing back and forth to drive the two milling wheels 3 to move significantly on the concrete road surface and carry out large-scale milling treatment on the concrete road surface.

[0048] When the protruding end of the hexagonal insert shaft 306 is inserted into the end of the drive shaft 5, the milling wheel 3 can be positioned between it and the limiting ring 503, preventing the milling wheel 3 from falling off the drive shaft 5 during milling. The spring fitted on the hexagonal insert shaft 306 is used to push the hexagonal insert shaft 306 to maintain the insertion and positioning state. The star-shaped drive frame 4, the connecting rod 403, and the hexagonal insert shaft 306 are connected to form a crank-slider mechanism. Through this mechanism, the forward rotation of the star-shaped drive frame 4 can drive the hexagonal insert shaft 306 to slide out synchronously and with the drive shaft 5. Shaft 5 is removed, and milling wheel 3 is loosened for disassembly, repair, or replacement. Through a crank-slider mechanism, this invention only requires a simple operation of turning the star-shaped drive frame 4 in the forward direction to efficiently and conveniently complete the loosening and unlocking of milling wheel 3 in one go. Compared with the existing technology that uses a large-diameter nut to lock and position milling wheel 3, this eliminates the trouble of needing to use an external force-applying tool (such as a long lever arm wrench) and operate the external force-applying tool to twist and loosen the large-diameter nut with a large locking torque. The operation is simple and time-saving, which helps to improve the disassembly efficiency of milling wheel 3.

[0049] The cover plate 305 and the protective ring 304 together form a closed cover. This cover can shield the crank-slider mechanism inside, preventing the crank-slider mechanism from being directly exposed to the milling and crushing working environment without shielding protection, which would easily cause concrete fragments to fly off and get stuck between them, thus helping to ensure the normal and effective implementation of the milling wheel 3's efficient unlocking function.

[0050] The plum blossom knob 402 is fixedly connected to the star-shaped drive frame 4 via the short rotating shaft 401. The star-shaped drive frame 4 can be torsional driven by the plum blossom knob 402. The plum blossom knob 402 is built into the retaining ring 3051, which avoids the plum blossom knob 402 being directly exposed to the milling and breaking working environment without shielding. It is easy for the plum blossom knob 402 to collide with the concrete road surface or other obstacles encountered during the milling operation and be driven to twist by the impact of the obstacle. This causes the star-shaped drive frame 4 to be torsionally driven, pulling the hexagonal insert shaft 306 away from the active drive shaft 5, releasing the positioning effect on the milling wheel 3, causing the milling wheel 3 to be accidentally mislocked and fall off the active drive shaft 5, affecting the normal and effective implementation of the milling operation. The cover has the same effect on the crank-slider mechanism. Thus, the cover and the retaining ring 3051 work together to ensure the positioning stability of the hexagonal insert shaft 306 on the milling wheel 3.

[0051] The following points should be noted in this article:

[0052] 1. The accompanying drawings of this utility model embodiment only involve the structure involved in this utility model embodiment; other structures can refer to general designs.

[0053] 2. Where there is no conflict, the embodiments of this utility model and the features in the embodiments can be combined with each other to obtain new embodiments.

[0054] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A concrete pavement repairing milling device, comprising a driving shaft (5) and milling wheels (3), two milling wheels (3) are symmetrically sleeved on the driving shaft (5); characterized in that An inner-outer sequentially sleeved small-diameter retaining ring (302), a large-diameter retaining ring (303) and a protective ring (304) are welded on the outer annular end face of the milling wheel (3), a plurality of six-ribbed inserting shafts (306) are slidably installed on the small-diameter retaining ring (302) and the large-diameter retaining ring (303) by spring pushing positioning, the first end of the six-ribbed inserting shafts (306) is inserted into the end of the driving shaft (5); the opening end of the protective ring (304) is welded and blocked with a cover plate (305), the outer side of the center part of the cover plate (305) is welded with a surrounding ring (3051), the star-shaped driving frame (4) is rotatably arranged in the opening of the protective ring (304), the short rotating shaft (401) is welded at the center of the star-shaped driving frame (4), the short rotating shaft (401) is rotatably connected with the center of the cover plate (305), the first end of the short rotating shaft (401) is welded with a plum blossom knob (402), the plum blossom knob (402) is hidden in the surrounding ring (3051); a plurality of connecting rods (403) are rotatably connected between the driving rods and the six-ribbed inserting shafts (306) on the star-shaped driving frame (4).

2. The milling device for repairing a concrete pavement according to claim 1, wherein The tail end of the connecting rod (403) is rotatably connected with the first end of the driving rod, and the first end is rotatably connected with the tail end of the six-ribbed inserting shaft (306).

3. The milling device for repairing a concrete pavement according to claim 1, wherein The part of the driving shaft (5) between the two milling wheels (3) is symmetrically fixed with a limiting ring (503), and the opposite sides of the two milling wheels (3) correspond to the abutting contact with the two limiting rings (503).

4. The milling device for repairing a concrete pavement according to claim 1, wherein A plurality of milling teeth (301) are welded and arranged on the outer periphery of the milling wheel (3), and a plurality of strip-shaped driving grooves (307) are formed in the inner periphery of the central shaft hole; A plurality of key grooves (501) are symmetrically formed on the driving shaft (5), the positions of the two plurality of strip-shaped driving grooves (307) on the central shaft hole of the milling wheel (3) and the two plurality of key grooves (501) correspond to each other, and the two are connected to form two complete strip-shaped key grooves, and two plurality of flat keys (502) are slidably inserted into the two strip-shaped key grooves.

5. The milling device for repairing a concrete pavement according to claim 1, wherein Further comprising a U-shaped transmission box (1) and a trapezoidal reduction box (2), the driving shaft (5) is rotatably installed on the bottom side of the U-shaped transmission box (1), the trapezoidal reduction box (2) is welded on the top end of the U-shaped transmission box (1), and the driving shaft (5) is driven to rotate by the hydraulic drive mechanism arranged in the U-shaped transmission box (1) and the trapezoidal reduction box (2).

6. The milling device for repairing a concrete pavement according to claim 5, wherein The top end of the trapezoidal reduction box (2) is welded with a mounting plate (202), and the whole milling device is fixedly connected to the first end of the excavator arm through the mounting plate (202).

7. The milling device for repairing a concrete pavement according to claim 5, wherein Two high-pressure oil pipes (201) are connected to the side wall of the trapezoidal reduction box (2), the first ends of the two high-pressure oil pipes (201) are connected with the hydraulic drive mechanism, and the tail ends are connected with the hydraulic power system of the excavator.

Images