Retainer mechanism for repairing

Abstract

The utility model provides a retainer mechanism for repairing, which comprises a base and a retainer which are made of metal mould pressing, and transition parts of the base are respectively and firmly welded with relevant surfaces of a substrate and then are connected into a whole. And the holding end of the holder is sleeved in the accommodating part of the base, and the front section surface is hit by using a metal hammer, so that the second holding surface and the accommodating surface form interference conical fit. A tensioning hoop is assembled in the annular groove face of the retainer, the outer diameter of the tensioning hoop is larger than the minimum inner diameter of the containing part, and the tensioning hoop is used for generating external tensioning force in the matching hole, so that the retainer can stably and effectively work in the base. When the service life of the retainer is reasonable, the retainer is replaced by a new retainer, and the whole system can be continuously and efficiently used for a long time. According to the utility model, the base and the retainer system can be matched according to the existing base, so that the service life of the existing base can be greatly prolonged, unnecessary waste is avoided, the construction cost is saved, and the economic benefit is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical working tools for road engineering, and particularly relates to a retaining frame mechanism for repairing. Background Art

[0002] The milling drum is the primary working component of a milling machine. It consists of a milling rotor shaft, drum, base, cutter holder, and cutter head. It directly contacts the road surface, milling the material through its high-speed rotating cutter. The milling drum of a reclaimer and soil stabilizer is designed to mix the material as evenly as possible. Because, unlike road milling machines, a discharge conveyor is not used to transport the milled material, the milling drum lacks spiral lines. To achieve optimal mixing, the base is welded to the drum body.

[0003] When milling different materials, the milled material may adhere to the milling drum. This can affect the rotation of the cutter head and ultimately require costly replacement (repair) of the cutter head and base. The impact forces generated during cutting place high loads on the contact surfaces of the lower part of the cutter holder. If the tightening torque (500 N·m) is not applied to the fastening bolts to a sufficiently high level, the load on the lower contact surface, which can lead to wear and deformation, will increase. In this case, the cutter holder strikes the lower part of the base like a hammer with each cut. The resulting deformation significantly shortens the service life of the base. Failure to ensure that the base shank bore is not contaminated by milled material when replacing the cutter holder will accelerate the reduction in service life. Therefore, the cutter holder should always be installed in the base in a safe and clean manner, and the base bore should be free of deposits.

[0004] When the threaded holes in the base are repeatedly subjected to the torque of the fastening bolts, the tightness of the threaded holes and the fastening bolts will be greatly shortened, causing the threaded holes to fail. Then the base needs to be replaced. In most cases, the economic service life of the base is far from being reached, and replacing the base requires metal cutting to remove it, which is time-consuming and labor-intensive.

[0005] Therefore, a repair retainer mechanism is in urgent need of being proposed. Utility Model Content

[0006] The purpose of the utility model is to provide a repair retainer mechanism, which can match the base and retainer system according to the existing base, thereby greatly extending the service life of the existing base, avoiding unnecessary waste, and saving construction costs.

[0007] The purpose of this utility model is achieved in this way:

[0008] The utility model provides a repair retainer mechanism, comprising a base and a retainer, wherein the base has an outer ring body and a front end portion, and the front end portion is extended downward from the outer ring body; the retainer adopts a rotating body structure, and the retainer comprises a front section, a wide wing portion and a retaining end from top to bottom, a central through hole is penetrated by the center of the retainer, and the retaining end is inserted into the accommodating portion of the base.

[0009] Preferably, the front section has an outer diameter φh, and the size range is between 35mm and 45mm; the outer end face of the front end is the front section face, and the front section face is annular. The front section face is one of the main load-bearing surfaces, used for installing the chisel and transmitting the comprehensive working force exerted on the chisel.

[0010] Preferably, the wide wing portion extends outward from the front section of the retaining frame to form a disc shape, has an outer diameter φg, and a size range of 65mm to 70mm. The wide wing portion includes a first wide wing surface, a second wide wing surface, and a third wide wing surface. The third wide wing surface has a rotation angle z, and the angle range is between 120° and 130°.

[0011] Preferably, the retaining end has multiple diameter cylinders from top to bottom, and the retaining end includes a first retaining surface, a second retaining surface, an annular groove surface, and a third retaining surface. The first retaining surface has a diameter φe; the upper end of the second retaining surface has a diameter φe, and the lower end of the second retaining surface has a diameter φf. The diameter size of the second retaining surface is gradually reduced from the diameter φe to the diameter φf, so that an interference tapered fit is formed between the second retaining surface and the accommodating surface; the annular groove surface has a diameter φd; the third retaining surface has a diameter φj; and φe>φf>φd>φj;

[0012] The diameter φe ranges from 40 mm to 45 mm, the diameter φf ranges from 30 mm to 35 mm, and the diameter φd ranges from 25 mm to 30 mm.

[0013] Preferably, an angle x is formed between the outer surfaces opposite to each other of the second retaining surface, and the angle range is between 10° and 15°.

[0014] Preferably, the annular groove surface has a length L1 along the center direction of the retaining frame, and the size range is between 10mm and 15mm. A tensioning hoop is provided in the annular groove surface, and the tensioning hoop is made of non-metallic material. The tensioning hoop has an outer diameter φk, and the size range is between 35.5mm and 38.5mm.

[0015] Preferably, the outer ring body has an outer ring surface, the outer ring surface has a diameter φa, and the size range is between 70mm and 80mm; the outer ring body has a bearing surface and a bottom surface on both sides, and there is an angle γ between the bearing surface and the bottom surface, and the angle range is between 6° and 7°; there is a transition part between the bottom surface and the outer ring surface, and the transition part is annular and is used to be firmly welded to the first receiving surface and the second receiving surface of the base; the outer ring body has a maximum thickness H, and the size range is between 30mm and 40mm.

[0016] Preferably, the front end portion has a first front end face, a second front end face, a third front end face, and a fourth front end face, and the first front end face and the second front end face form an angle y, and the angle range is between 70° and 80°; the third front end face and the fourth front end face form an angle w, and the angle range is between 50° and 60°, and the fourth front end face and the bottom surface have a minimum thickness H1, and the size range is between 30mm and 35mm.

[0017] Preferably, the base has a receiving portion that passes through the outer ring body, and the receiving portion has a coaxial minimum inner diameter φc and a maximum inner diameter φb, and the maximum inner diameter φb is located on the bearing surface, and the minimum inner diameter φc has a size range of 35mm to 38mm, and the maximum inner diameter φb has a size range of 40mm to 43mm; the receiving portion has a receiving surface, and the receiving surface has an angle α, and the angle range is between 10° and 15°; an angle β is formed between the central axis A of the receiving portion and the bearing surface, and the angle range is between 85° and 95°.

[0018] Preferably, the base and the retaining frame are both made of metal molded, and a distance B is maintained between the first wide wing surface and the bearing surface, with a size ranging from 3 mm to 5 mm.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The transition portion in the present invention is firmly welded to the first receiving surface and the second receiving surface of the base, respectively, so that the base and the base are connected as one. The retaining end of the retaining frame is inserted into the accommodating portion of the base, and the front section surface is struck with a metal hammer, so that an interference conical fit is formed between the second retaining surface and the accommodating surface. A tensioning hoop is assembled in the annular groove surface of the retaining frame, which can generate an external expansion force in the matching hole, so that the retaining frame can work stably and effectively in the base. In addition, since a distance B is maintained between the first wide wing surface and the bearing surface, the retaining frame can be pried with the help of tools within this distance B for easy disassembly. The repair retaining frame mechanism provided by the present invention can be matched with a base and retaining frame system according to the existing base, which can greatly extend the service life of the base, avoid unnecessary waste, and save construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of the base of a repair retainer mechanism of the utility model;

[0022] Figure 2 for Figure 1 Full cross-sectional view of middle AA;

[0023] Figure 3 This is a three-dimensional view of the base of a repair retainer mechanism of the utility model;

[0024] Figure 4 This is a front view of a retainer in a repair retainer mechanism of the utility model;

[0025] Figure 5 for Figure 4 Full cross-section of the middle CC;

[0026] Figure 6 A view of a prior art base;

[0027] Figure 7 This is a schematic diagram of the overall structure of a repair retainer mechanism after installation;

[0028] Figure 8 for Figure 7 A full cross-section of the middle BB. DETAILED DESCRIPTION

[0029] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0030] like Figures 1 to 3 As shown, this embodiment provides a repair retainer mechanism comprising a base 1 and a retainer 2. In this embodiment, the base 1 comprises an outer ring 16 and a front end 14, with the front end 14 extending from the outer ring 16. The outer ring 16 has an outer ring surface 16.1 with a diameter φa ranging from 70 mm to 80 mm. In this embodiment, the diameters φa can be selected from 70 mm, 76 mm, or 80 mm depending on the actual situation. The outer ring 16 has bearing surfaces 10 and a bottom surface 13 on either side. The bearing surfaces 10 and the bottom surface 13 form an angle γ ranging from 6° to 7°. In this embodiment, the angles γ can be selected from 6°, 6.5°, or 7° depending on the actual situation. The outer ring 16 has a maximum thickness H ranging from 30 mm to 40 mm. In this embodiment, the diameters φa can be selected from 30 mm, 36 mm, or 40 mm depending on the actual situation.

[0031] In this embodiment, the front end portion 14 has a first front end face 14.1, a second front end face 14.2, a third front end face 14.3, and a fourth front end face 14.4. The first front end face 14.1 and the second front end face 14.2 form an angle y, and the angle range is between 70° and 80°. In this embodiment, 70°, 75°, and 80° can be selected according to actual conditions; the third front end face 14.3 and the fourth front end face 14.4 form an angle w, and the angle range is between 50° and 60°. In this embodiment, 50°, 55°, and 60° can be selected according to actual conditions; and the fourth front end face 14.4 and the bottom surface 13 have a minimum thickness H1, and the size range is between 30mm and 35mm. In this embodiment, 30mm, 32mm, and 35mm can be selected according to actual conditions.

[0032] In this embodiment, the base 1 has a receiving portion 11 that passes through the outer ring body 16. The receiving portion 11 has a coaxial minimum inner diameter φc and a maximum inner diameter φb. The maximum inner diameter φb is located on the bearing surface 10. The minimum inner diameter φc ranges from 35 mm to 38 mm. In this embodiment, 35 mm, 33 mm, and 38 mm can be selected according to actual conditions; the maximum inner diameter φb ranges from 40 mm to 43 mm. In this embodiment, 40 mm, 42 mm, and 43 mm can be selected according to actual conditions; the receiving portion 11 has a receiving surface 11.1. The receiving surface 11.1 has an angle α. The angle range is between 10° and 15°. In this embodiment, 10°, 12°, and 15° can be selected according to actual conditions; an angle β is formed between the central axis A of the receiving portion 11 and the bearing surface 10. The angle range is between 85° and 95°. In this embodiment, 85°, 90°, and 95° can be selected according to actual conditions.

[0033] like Figure 4 and Figure 5 As shown, the retainer 2 adopts a rotating body structure, and the retainer 2 includes a front section 21, a wide wing portion 20 and a retaining end 22 from top to bottom. A central through hole 23 is provided in the center of the retainer 2, and the retaining end 22 is inserted into the accommodating portion 11 of the base 1.

[0034] In this embodiment, the front section 21 has an outer diameter φh, and the size range is between 35 mm and 45 mm. In this embodiment, 35 mm, 42 mm, and 45 mm can be selected according to actual conditions; the outer end surface of the front end 21 is the front section surface 21.1, which is annular. The front section surface 21.1 is one of the main load-bearing surfaces and is used to install the chisel and transmit the comprehensive working force exerted on the chisel.

[0035] In this embodiment, the wide wing portion 20 extends outward from the front section 21 of the retaining frame 2 to form a disc shape, has an outer diameter φg, and a size range of 65mm to 70mm. In this embodiment, 65mm, 67mm, and 70mm can be selected according to actual conditions; the wide wing portion 20 includes a first wide wing surface 20.1, a second wide wing surface 20.2, and a third wide wing surface 20.3. The third wide wing surface 20.3 has a rotation angle z, and the angle range is between 120° and 130°. In this embodiment, 120°, 125°, and 130° can be selected according to actual conditions.

[0036] In this embodiment, the retaining end 22 has multiple diameter cylinders from top to bottom. The retaining end 22 includes a first retaining surface 22.1, a second retaining surface 22.2, an annular groove surface 22.3, and a third retaining surface 22.4. The first retaining surface 22.1 has a diameter φe; the upper end of the second retaining surface 22.2 has a diameter φe, and the lower end of the second retaining surface 22.2 has a diameter φf. The diameter size of the second retaining surface 22.2 is set from diameter φe to diameter φf, so that an interference tapered fit is formed between the second retaining surface 22.2 and the receiving surface 11.1; the annular groove surface 22.3 has a diameter φd; the third retaining surface 22.4 has a diameter φj; and φe>φf>φd>φj;

[0037] Specifically, the diameter φe size range is between 40mm and 45mm. In this embodiment, 40mm, 42mm, and 45mm can be selected according to actual conditions; the diameter φf size range is between 30mm and 35mm. In this embodiment, 30mm, 33mm, and 35mm can be selected according to actual conditions; the diameter φd size range is between 25mm and 30mm. In this embodiment, 25mm, 28mm, and 30mm can be selected according to actual conditions.

[0038] In this embodiment, an angle x is formed between the outer surfaces opposite to each other of the second retaining surface 22.2, and the angle range is between 10° and 15°. In this embodiment, 10°, 12°, or 15° can be selected according to actual conditions.

[0039] In this embodiment, the annular groove surface 22.3 has a length L1 along the center direction of the retaining frame 2, and the size range is between 10 mm and 15 mm. In this embodiment, 10 mm, 13 mm, and 15 mm can be selected according to actual conditions; a tensioning hoop 5 is provided in the annular groove surface 22.3, and the tensioning hoop 5 is made of non-metallic material. The tensioning hoop 5 has an outer diameter φk, and the size range is between 35.5 mm and 38.5 mm. In this embodiment, 35.5 mm, 36 mm, and 38.5 mm can be selected according to actual conditions, which is larger than the minimum inner diameter φc of the accommodating portion 11.

[0040] In this embodiment, the base 1 and the retaining frame 2 are both made of metal molded, and a distance B is maintained between the first wide wing surface 20.1 and the bearing surface 10, with a size range of 3mm to 5mm. In this embodiment, 3mm, 4mm, or 5mm can be selected according to actual conditions.

[0041] The working principle of this embodiment is further described below:

[0042] Figure 6 In the case of the existing base 4, there is a first receiving surface 41 on the upper front part, a second receiving surface 40 on the lower front part, and a threaded hole 42 is located at the rear. The fastening of the original tool holder depends entirely on the torque of the threaded hole 42 and the bolt. The threaded hole 42 is always subjected to impact and has a short service life. Once the threaded hole 42 fails, it means that the entire base 4 cannot be used anymore and is scrapped. The lower supporting surface 43 is welded to the milling drum as a whole in an annular shape. If you want to remove the base 4, you have to use a cutting tool to cut the entire circle of welds, plus the subsequent shaping and grinding work, the process is cumbersome and time-consuming.

[0043] like Figure 7 and Figure 8 As shown, there is a transition portion 15 between the bottom surface 13 and the outer ring surface 16.1. The transition portion 15 is annular. First, the transition portion 15 is firmly welded to the first receiving surface 41 and the second receiving surface 40 of the base 4, so that the base 1 and the base 4 are connected as one.

[0044] Next, insert the retaining end 22 of the retainer 2 into the receiving portion 11 of the base 1 along the F direction, and strike the front surface 21.1 with a metal hammer to form an interference tapered fit between the second retaining surface and the receiving surface. A tensioning hoop 5 is fitted into the annular groove surface 22.3 of the retainer 2, generating an outward tension force in the mating hole 12 along the F1 direction, ensuring that the retainer 2 remains securely in the base 1 and operates effectively.

[0045] Finally, the chisel 3 is installed in the accommodating portion 11 , with its central axis A2 kept coaxial with the center of the accommodating portion 11 , so that the chisel 3 can rotate smoothly and wear evenly, thereby extending its service life.

[0046] When the retainer 2 reaches its reasonable service life, the old retainer 2 is removed and replaced with a new retainer 2, and the entire system can continue to be used efficiently and for a long time. Because the first wide wing surface 20.1 maintains a distance B from the load-bearing surface 10, the retainer 2 can be pried with a tool within this distance B, facilitating removal.

[0047] The repair retainer mechanism provided in this embodiment can match the base and retainer system according to the existing base, which can greatly extend the service life of the existing base, avoid unnecessary waste, save construction costs, and thus improve economic benefits.

[0048] It should be noted that the drawings of this embodiment are all in a very simplified form and use non-precise ratios, and are only used to conveniently and clearly assist in explaining the embodiments of the present utility model.

[0049] It should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation method can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0050] The series of detailed descriptions listed above are only specific descriptions of the feasible implementation methods of this application. They are not intended to limit the scope of protection of the application. Any equivalent implementation methods or changes that do not deviate from the technical spirit of this application should be included in the scope of protection of this application.

Claims

1. A repair retainer mechanism, characterized in that: The invention comprises a base (1) and a retaining frame (2), wherein the base (1) comprises an outer ring body (16) and a front end portion (14), wherein the front end portion (14) extends downward from the outer ring body (16); the retaining frame (2) adopts a rotating body structure, and the retaining frame (2) comprises a front section (21), a wide wing portion (20) and a retaining end (22) from top to bottom, wherein a central through hole (23) is provided through the center of the retaining frame (2), and the retaining end (22) is inserted into the accommodating portion (11) of the base (1).

2. A repair retainer mechanism according to claim 1, characterized in that: The front section (21) has an outer diameter φh, and the size range is between 35 mm and 45 mm; the outer end surface of the front section (21) is the front section surface (21.1), and the front section surface (21.1) is annular. The front section surface (21.1) is one of the main load-bearing surfaces and is used for installing a chisel and transmitting the comprehensive working force exerted on the chisel.

3. A repair retainer mechanism according to claim 1, characterized in that: The wide wing portion (20) extends outward from the front section (21) of the retaining frame (2) to form a disc shape, has an outer diameter φg, and a size range of between 65 mm and 70 mm. The wide wing portion (20) includes a first wide wing surface (20.1), a second wide wing surface (20.2), and a third wide wing surface (20.3). The third wide wing surface (20.3) has a rotation angle z, and the angle range is between 120° and 130°.

4. A repair retainer mechanism according to claim 1, characterized in that: The retaining end (22) has multiple diameter cylinders from top to bottom, and the retaining end (22) includes a first retaining surface (22.1), a second retaining surface (22.2), an annular groove surface (22.3) and a third retaining surface (22.4). The first retaining surface (22.1) has a diameter φe; the upper end of the second retaining surface (22.2) has a diameter φe, and the lower end of the second retaining surface (22.2) has a diameter φf. The diameter size of the second retaining surface (22.2) is gradually reduced from the diameter φe to the diameter φf, so that an interference tapered fit is formed between the second retaining surface (22.2) and the accommodating surface (11.1); the annular groove surface (22.3) has a diameter φd; the third retaining surface (22.4) has a diameter φj; and φe>φf>φd>φj; The diameter φe ranges from 40 mm to 45 mm, the diameter φf ranges from 30 mm to 35 mm, and the diameter φd ranges from 25 mm to 30 mm.

5. A repair retainer mechanism according to claim 4, characterized in that: An angle x is formed between the outer surfaces opposite to each other of the second retaining surface (22.2), and the angle range is between 10° and 15°.

6. A repair retainer mechanism according to claim 4, characterized in that: The annular groove surface (22.3) has a length L1 along the central direction of the retaining frame (2), and a size range is between 10 mm and 15 mm. A tensioning hoop (5) is provided in the annular groove surface (22.3), and the tensioning hoop (5) is made of a non-metallic material. The tensioning hoop (5) has an outer diameter φk, and a size range is between 35.5 mm and 38.5 mm.

7. A repair retainer mechanism according to claim 6, characterized in that: The outer ring body (16) has an outer ring surface (16.1), and the outer ring surface (16.1) has a diameter φa, and the size range is between 70mm and 80mm; the outer ring body (16) has a bearing surface (10) and a bottom surface (13) on both sides, and an angle γ is formed between the bearing surface (10) and the bottom surface (13), and the angle range is between 6° and 7°; a transition portion (15) is provided between the bottom surface (13) and the outer ring surface (16.1), and the transition portion (15) is annular and is used to be firmly welded to the first receiving surface (41) and the second receiving surface (40) of the base (4); the outer ring body (16) has a maximum thickness H, and the size range is between 30mm and 40mm.

8. A repair retainer mechanism according to claim 7, characterized in that: The front end portion (14) comprises a first front end face (14.1), a second front end face (14.2), a third front end face (14.3), and a fourth front end face (14.4); an angle y is formed between the first front end face (14.1) and the second front end face (14.2), and the angle range is between 70° and 80°; an angle w is formed between the third front end face (14.3) and the fourth front end face (14.4), and the angle range is between 50° and 60°; and the fourth front end face (14.4) and the bottom face (13) have a minimum thickness H1, and the size range is between 30 mm and 35 mm.

9. The repair retainer mechanism according to claim 8, characterized in that: The base (1) has a housing portion (11) that passes through the outer ring body (16), and the housing portion (11) has a coaxial minimum inner diameter φc and a maximum inner diameter φb, the maximum inner diameter φb is located on the bearing surface (10), the minimum inner diameter φc has a size range of 35 mm to 38 mm, and the maximum inner diameter φb has a size range of 40 mm to 43 mm; the housing portion (11) has a housing surface (11.1), and the housing surface (11.1) has an angle α, and the angle range is between 10° and 15°; the central axis A of the housing portion (11) forms an angle β with the bearing surface (10), and the angle range is between 85° and 95°.

10. A repair retainer mechanism according to any one of claims 1 to 9, characterized in that: The base (1) and the retaining frame (2) are both made of metal die-casting, and a distance B is maintained between the first wide wing surface (20.1) and the bearing surface (10), with a size ranging from 3 mm to 5 mm.

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