Milling rotor gear sleeve, base and tool apron system

Abstract

The invention discloses a milling rotor gear sleeve, a base and a tool apron system, and belongs to the technical field of engineering machinery. The tooth sleeve comprises a tool bit mounting part, a supporting part and a first connecting part which are arranged in sequence; the tool bit mounting part comprises a cylinder, and a mounting hole for mounting the tool bit is formed in the top of the cylinder; the cross section of the supporting part is polygonal, the longitudinal section passing through the central surface of the supporting part is V-shaped, and the V shape is an acute angle; a first cutter dismounting hole is formed in one side of the supporting part and communicates with the mounting hole. The gear sleeve supporting part is of a polyhedral structure, axial and tangential acting force transmitted from the ground is better dispersed to the base, and therefore the higher bearing requirement is met; the tool bit can be quickly detached through the first tool detaching hole, and detachment is more convenient and faster.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction machinery, and particularly relates to a milling rotor tooth sleeve, a base and a tool holder system. Background Art

[0002] Machinery and equipment such as milling machines, pavement recycling machines and open-pit mining machines achieve milling and crushing of road surfaces or mining materials through the rotational movement and horizontal feeding movement of the cutter heads. With the increasing demand for milling and crushing recycling of cement concrete road surfaces, higher requirements are also put forward for the strength of the tooth sleeves. The cutter heads are installed on the tooth sleeves. During the operation, the cutter heads rotate relative to the tooth sleeves under the action of lateral forces, and at the same time, abrasive wear is generated on the tooth sleeves under the action of axial forces and milling materials. In addition, when milling hard objects such as steel or large pieces of crushed stone, the tooth sleeves are prone to fracture. When the tooth sleeves are worn to a certain extent or fractured, it is necessary to be able to complete the replacement conveniently and quickly.

[0003] However, there is a contradiction between convenient disassembly and high reliability itself, and the existing conical tool holder structure cannot take both into account. Summary of the Invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a milling rotor tooth sleeve, a base and a tool holder system, so as to achieve higher load-bearing capacity and faster disassembly and assembly of the tooth sleeve.

[0005] The present invention provides the following technical solutions: In a first aspect, a milling rotor tooth sleeve is provided, which includes a cutter head mounting portion, a support portion and a first connection portion arranged in sequence; the cutter head mounting portion includes a cylinder, and a mounting hole for mounting a cutter head is provided at the top of the cylinder; the cross-section of the support portion is polygonal, and the longitudinal section passing through the central plane of the support portion is V-shaped, and the V-shape is acute; a first cutter unloading hole is provided on one side of the support portion, and the first cutter unloading hole communicates with the mounting hole.

[0006] As an optional technical solution of the present invention, the cutter head mounting portion further includes a first base body; the cylinder is arranged on the top of the first base body; the first base body covers the support portion downward along the central axis direction of the cylinder.

[0007] As an optional technical solution of the present invention, the intersection point of the extension lines of the two sides of the V-shaped cross-section of the support portion is located on the extension section of the first connection portion; the angle between the two sides of the V-shaped cross-section of the support portion γ is set to 0° ≤ γ ≤ 45°.

[0008] As an optional technical solution of the present invention, a first bearing surface and a second bearing surface are provided on the side of the support portion away from the first cutter unloading hole, and a first transition plane is provided between the first bearing surface and the second bearing surface; the angle between the first bearing surface and the second bearing surfaceα Set to 120° ≤ α ≤ 150°.

[0009] As an alternative technical solution of the present invention, a third bearing surface and a fourth bearing surface are provided on one side of the first tool unloading hole on the support portion, and a second transition plane is provided between the third bearing surface and the fourth bearing surface; the angle β Set to 130° ≤ β ≤ 160°.

[0010] As an alternative technical solution of the present invention, a groove is provided on the circumferential side of the top end of the support portion, and the support portion is connected to the tool head mounting portion through the groove.

[0011] In a second aspect, a milling rotor base is provided for carrying the milling rotor tooth sleeve described in the first aspect; the milling rotor base includes a second base body, a bearing portion and a second connecting portion; the bearing portion is a multi-faceted inner hole and is embedded in the second base body; the cross-section of the central plane of the bearing portion is V-shaped and the V-shape is acute; the second connecting portion is provided at the bottom of the bearing portion; a second tool unloading hole is provided obliquely upward at the top of the second base body, and the second tool unloading hole communicates with the bearing portion.

[0012] As an alternative technical solution of the present invention, the angle μ between the two sides of the V-shaped cross-section of the bearing portion is set to 0° ≤ μ ≤ 45°.

[0013] As an alternative technical solution of the present invention, a first front bearing surface and a second front bearing surface are provided on the lower side inside the bearing portion, and a first transition fillet is provided between the first front bearing surface and the second front bearing surface; the angle θ between the first front bearing surface and the second front bearing surface is set to 120° ≤ θ ≤ 150°.

[0014] As an alternative technical solution of the present invention, a first rear bearing surface and a second rear bearing surface are provided on the upper side inside the bearing portion, and a second transition fillet is provided between the first rear bearing surface and the second rear bearing surface; the angle ω between the first rear bearing surface and the second rear bearing surface is set to 130° ≤ ω ≤ 160°.

[0015] In a third aspect, a tool holder system is provided, including the milling rotor tooth sleeve and the milling rotor base described in the second aspect; the milling rotor tooth sleeve is installed through the bearing portion in the milling rotor base and is fixed by fasteners.

[0016] As an alternative technical solution of the present invention, the fasteners are fixed through the mutually cooperating first connecting portion and second connecting portion.

[0017] As an alternative technical solution of the present invention, after the milling rotor tooth sleeve and the milling rotor base are assembled, the distance h between the edge of the side of the milling rotor base close to the cutter head mounting portion and the milling rotor tooth sleeve is h≥1mm.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: For the milling rotor tooth sleeve, base and cutter seat system provided by the present invention, the support part of the milling rotor tooth sleeve adopts a polyhedron structure, which can better disperse the axial and tangential acting forces transmitted from the ground to the milling rotor base, so as to meet higher bearing requirements; the cutter head can be quickly disassembled through the first cutter unloading hole, and the disassembly is more convenient and fast, improving the operation efficiency; the central section of the milling rotor tooth sleeve is V-shaped, and the formed angle is an acute angle. During the construction process, self-locking can be realized under the action of the axial force. The fasteners are only subjected to the warning force and have no other additional loads, and the connection between the milling rotor tooth sleeve and the milling rotor base is more reliable. Description of the Drawings

[0019] Figure 1 It is a schematic view of the rear side of the milling rotor tooth sleeve in an embodiment of the present invention; Figure 2 It is a schematic view of the front side of the milling rotor tooth sleeve in an embodiment of the present invention; Figure 3 It is a schematic view of the right side of the milling rotor tooth sleeve in an embodiment of the present invention; Figure 4 is Figure 3 the cross-sectional view from the 1-1 perspective in; Figure 5 It is a schematic view of the central section of the milling rotor tooth sleeve in an embodiment of the present invention; Figure 6 is Figure 3 the cross-sectional view from the 3-3 perspective in; Figure 7 is Figure 3 the cross-sectional view from the 4-4 perspective in; Figure 8 It is a schematic view of the front side of the milling rotor base in an embodiment of the present invention; Figure 9 It is a schematic view of the rear side of the milling rotor base in an embodiment of the present invention; Figure 10 It is a schematic view of the central section of the milling rotor base in an embodiment of the present invention; Figure 11 It is a projection view of the milling rotor base perpendicular to the first front bearing surface and the second front bearing surface in an embodiment of the present invention; Figure 12 It is a projection view of the milling rotor base perpendicular to the first rear bearing surface and the second rear bearing surface in an embodiment of the present invention; Figure 13 This is the installation schematic diagram of the tool holder system in the embodiment of the present invention.

[0020] In the figure, the markings are: 1, milling rotor tooth sleeve; 11, tool head mounting part; 111, first base body; 112, cylinder; 113, mounting hole; 12, supporting part; 121, groove; 122, first tool unloading hole; 13, first connecting part; 2, milling rotor base; 21, second base body; 211, second tool unloading hole; 22, bearing part; 23, second connecting part; 231, cylindrical hole; 3, tool holder system; 4, fastener; a, first bearing surface; b, second bearing surface; c, third bearing surface; d, fourth bearing surface; e, first transition plane; f, second transition plane; A, first front-end bearing surface; B, second front-end bearing surface; G, first rear-end bearing surface; H, second rear-end bearing surface; R1, first transition fillet; R2, second transition fillet. Specific embodiments

[0021] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and cannot be used to limit the protection scope of the present invention.

[0022] Embodiment 1 This embodiment provides a milling rotor tooth sleeve, as Figure 1 and Figure 2 shown, which includes a tool head mounting part 11, a supporting part 12 and a first connecting part 13 arranged in sequence.

[0023] The tool head mounting part 11 includes a first base body 111 and a cylinder 112. The central axis of the cylinder 112 is L1, and a mounting hole 113 for mounting a tool head is provided at the top of the cylinder 112. The tool head mounting part 11 realizes the accommodation of the cutting tool head. The cylinder 112 is arranged on the top of the first base body 111; the first base body 111 covers the supporting part 12 downward along the central axis L1 of the cylinder 112, avoiding the wear of the supporting part 12 during the operation process and also preventing the milling material from entering the milling rotor tooth sleeve 1 and the base bearing part.

[0024] The tool head mounting part 11 extends downward to form the supporting part 12. As Figure 3 and Figure 4 shown, the cross-section of the supporting part 12 in the direction perpendicular to the central axis L1 of the cylinder 112 is a polygon, and the number of sides of the polygon is not less than 6. The supporting part 12 is constructed as a polyhedron to better realize the transmission of the cutting force from the tooth sleeve to the base.

[0025] As Figure 3The longitudinal section passing through the central plane of the support portion 12 in the direction parallel to the central axis L1 of the cylinder 112 is V-shaped, and the V-shape is an acute angle. The front and rear sides of the support portion are constructed as wedges, which achieve self-locking under the action of the axial force, and the connection between the milling rotor tooth sleeve 1 and the milling rotor base 2 is more reliable. The angle between the two sides of the V-shaped cross-section of the support portion 12 γ is set to 0° ≤ γ ≤ 45°, and preferably 15 - 25° in this embodiment. The design of the V-shaped cross-section facilitates the self-locking of the tooth sleeve during the operation, avoids the loosening of the fasteners, and the connection is more reliable.

[0026] The support portion 12 extends downward to form a first connecting portion 13. In this embodiment, the first connecting portion 13 adopts a stud or a screw hole, and its axis is L2. As Figure 5 shown, the central axis L1 and the axis L2 of the first connecting portion 13 intersect, are parallel or coincide on the central plane of the milling rotor tooth sleeve 1, meeting the requirements for the disassembly space of the fasteners when arranging different tool seats.

[0027] The back surface of the support portion 12 is provided with a first tool unloading hole 122 inclined upward. The first tool unloading hole 122 communicates with the mounting hole 113, which is convenient for the disassembly of the tool head, and the opening of the first tool unloading hole 122 on the back surface of the support portion 12 realizes a substantially uniform distribution of the overall stiffness of the milling rotor tooth sleeve 1. In this embodiment, the side where the first tool unloading hole 122 is located is taken as the rear side of the tooth sleeve, and the other side is taken as the front side of the tooth sleeve.

[0028] Furthermore, as Figure 5 shown, the intersection point P of the extension lines of the two sides of the V-shaped cross-section of the support portion 12 is located on the extension section of the first connecting portion 13. In this embodiment, the intersection point P and L2 are on the same straight line, and the warning force can be better transmitted to the front and rear bearing surfaces of the base.

[0029] As Figure 6 shown, a third bearing surface c and a fourth bearing surface d are provided on the side of the support portion 12 where the first tool unloading hole 122 is located. A second transition plane f is provided between the third bearing surface c and the fourth bearing surface d. The transition plane realizes the natural connection between forging and machining of the support portion 12 and the tool head mounting portion 11, avoiding stress concentration caused by machining problems. The angle between the third bearing surface c and the fourth bearing surface d β is set to 130° ≤ β ≤ 160°, and preferably 140 - 145° in this embodiment. According to the entry angle of the tool head and the forces exerted on it by the ground in three directions, the angle design of the third bearing surface c and the fourth bearing surface d effectively transmits the axial force, tangential force and lateral force transmitted by the tool head to the tooth sleeve to the base, with a larger overall stress-bearing area and an increased bearing capacity of the tooth sleeve.

[0030] As Figure 7As shown, on one side of the support portion 12 away from the first tool unloading hole 122, there are a first bearing surface a and a second bearing surface b, and a first transition plane e is provided between the first bearing surface a and the second bearing surface b; the angle between the first bearing surface a and the second bearing surface b α is set to 120° ≤ α ≤ 150°, and in this embodiment, it is preferably 130 - 135°. According to the downward pressure during the whole machine's tool dropping and the cutting force during construction, the angle design of the first bearing surface a and the second bearing surface b effectively unloads the downward pressure of the whole machine and the tangential force and lateral force transmitted to the tooth sleeve onto the base, making the local force on the tooth sleeve more uniform and the stress dispersed.

[0031] Furthermore, as Figure 1 shown, a groove 121 is provided on the circumferential side of the top end of the support portion 12, and the support portion 12 is connected to the tool head mounting portion 11 through the groove 121. The groove 121 realizes the natural connection between the bearing surface and the non-bearing surface, making the processing of the bearing surface with extremely high precision requirements simpler and avoiding stress concentration caused by processing problems.

[0032] Embodiment 2 This embodiment provides a milling rotor base for carrying the milling rotor tooth sleeve described in Embodiment 1.

[0033] As Figure 8 and Figure 9 shown, the milling rotor base includes a second base body 21, a bearing portion 22, and a second connecting portion 23. In this embodiment, the side where the bearing portion 22 is open is taken as the front side of the milling rotor base 2, and the side where the second connecting portion 23 is located is taken as the rear side of the milling rotor base 2.

[0034] The bearing portion 22 is a multi-faceted inner hole and is embedded in the second base body 21; the cross-section of the central plane of the bearing portion 22 is V-shaped and the V-shape is acute. The second connecting portion 23 is provided at the bottom of the bearing portion 22. A second tool unloading hole 211 is provided obliquely upward at the top of the second base body 21, and the second tool unloading hole 211 communicates with the bearing portion 22. The second tool unloading hole 211 is opened at the rear side of the base, and the position is convenient for tool head disassembly. A cylindrical hole 231 for the first connecting portion 13 to pass through is provided on the second connecting portion 23.

[0035] Furthermore, as Figure 10 shown, the angle between the two sides of the V-shaped cross-section of the bearing portion 22 μ is set to 0° ≤ μ ≤ 45°, and in this embodiment, it is preferably 15 - 25°. The front and rear structures of the bearing portion 22 are wedge-shaped, realizing self-locking between the tooth sleeve and the base during the operation process, avoiding loosening of the fasteners, and making the connection more reliable.

[0036] As Figure 11As shown, a first front bearing surface A and a second front bearing surface B are provided on the lower side inside the bearing part 22. A first transition fillet R1 is provided between the first front bearing surface A and the second front bearing surface B. The transition fillet ensures a smooth transition of the machined surfaces that are at an angle to each other, ensures the angular dimension accuracy, and avoids stress concentration. The angle between the first front bearing surface A and the second front bearing surface B θ is set to be 120° ≤ θ ≤ 150°, and preferably 130 - 135° in this embodiment.

[0037] As Figure 12 shown, a first rear bearing surface G and a second rear bearing surface H are provided on the upper side inside the bearing part 22. A second transition fillet R2 is provided between the first rear bearing surface G and the second rear bearing surface H. The angle between the first rear bearing surface G and the second rear bearing surface H ω is set to be 130° ≤ ω ≤ 160°, and preferably 140 - 145° in this embodiment.

[0038] Embodiment 3 This embodiment provides a cutter holder system 3. As Figure 13 shown, it includes the milling rotor tooth sleeve 1 and the milling rotor base 2 described in Embodiment 2. The milling rotor tooth sleeve 1 is installed through the bearing part 22 in the milling rotor base 2 and fixed by a fastener 4.

[0039] Further, the fastener 4 is fixed through a mutually cooperating first connecting part 13 and second connecting part 23. In this embodiment, the fastener 4 is a bolt or a nut.

[0040] Further, after the milling rotor tooth sleeve 1 and the milling rotor base 2 are assembled, the distance h between the edge of the side of the milling rotor base 2 close to the cutter head mounting part 11 and the milling rotor tooth sleeve 1 is h ≥ 1 mm, and preferably 3 - 5 mm in this embodiment. Setting the axial clearance can achieve automatic compensation after the bearing surfaces of the milling rotor tooth sleeve 1 and the milling rotor base 2 are worn.

[0041] Further, after the milling rotor tooth sleeve 1 and the milling rotor base 2 are assembled, the first bearing surface a and the second bearing surface b on the milling rotor tooth sleeve 1 cooperate with the first front bearing surface A and the second front bearing surface B on the milling rotor base 2. The first front bearing surface A and the second front bearing surface B bear the acting force transmitted from the tooth sleeve and transmit the force to the rotor cylinder. The third bearing surface c and the fourth bearing surface d on the milling rotor tooth sleeve 1 cooperate with the first rear bearing surface G and the second rear bearing surface H on the milling rotor base 2. The first rear bearing surface G and the second rear bearing surface H bear the acting force transmitted from the tooth sleeve and transmit the force to the rotor cylinder. With the four front and rear bearing surfaces, the load-bearing acting force in all directions is significantly improved.

[0042] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

[0044] The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A milling rotor sleeve, characterized in that: It comprises a cutter head mounting portion (11), a supporting portion (12) and a first connecting portion (13) which are arranged in sequence; The cutter head mounting portion (11) comprises a cylinder (112), and a mounting hole (113) for mounting the cutter head is provided on the top of the cylinder (112); The cross section of the support portion (12) is polygonal, and the longitudinal section through the center plane of the support portion (12) is V-shaped, and the V-shape is an acute angle; A first tool removal hole (122) is provided on one side of the support portion (12), and the first tool removal hole (122) is connected to the mounting hole (113).

2. The milling rotor sleeve according to claim 1, characterized in that: The cutter head mounting portion (11) further comprises a first base body (111); The cylinder (112) is arranged on the top of the first base (111); The first base body (111) covers the support portion (12) downwardly along the central axis direction of the cylinder (112).

3. The milling rotor sleeve according to claim 1, characterized in that: The intersection point of the extended lines of the two sides of the V-shaped cross section of the support portion (12) is located on the extended section of the first connecting portion (13); The angle between the two sides of the V-shaped cross section of the support portion (12) γ Set to 0°≤ γ ≤45°.

4. The milling rotor sleeve according to claim 1, characterized in that: A first bearing surface (a) and a second bearing surface (b) are provided on a side of the support portion (12) away from the first tool unloading hole (122), and a first transition plane (e) is provided between the first bearing surface (a) and the second bearing surface (b); The angle between the first bearing surface (a) and the second bearing surface (b) α Set to 120°≤ α ≤150°.

5. The milling rotor sleeve according to claim 1, characterized in that: A third bearing surface (c) and a fourth bearing surface (d) are provided on the side of the support portion (12) where the first tool unloading hole (122) is located, and a second transition plane (f) is provided between the third bearing surface (c) and the fourth bearing surface (d); The angle between the third bearing surface (c) and the fourth bearing surface (d) β Set to 130°≤ β ≤160°.

6. The milling rotor sleeve according to claim 1, characterized in that: A groove (121) is provided on the peripheral side of the top end of the support portion (12), and the support portion (12) is connected to the cutter head mounting portion (11) via the groove (121).

7. A milling rotor base, characterized in that: Used to carry the milling rotor sleeve according to any one of claims 1 to 6; The milling rotor base comprises a second base body (21), a bearing portion (22) and a second connecting portion (23); The bearing portion (22) is a polyhedral inner hole and is embedded in the second base body (21); the cross section of the center plane of the bearing portion (22) is V-shaped, and the V-shape is an acute angle; The second connecting portion (23) is arranged at the bottom of the bearing portion (22); A second tool unloading hole (211) is provided at the top of the second base body (21) obliquely upwards, and the second tool unloading hole (211) is communicated with the bearing portion (22).

8. The milling rotor base according to claim 7, characterized in that: The angle between the two sides of the V-shaped cross section of the bearing portion (22) μ Set to 0°≤ μ ≤45°.

9. The milling rotor base according to claim 7, characterized in that: A first front end bearing surface (A) and a second front end bearing surface (B) are provided on the lower side of the bearing portion (22), and a first transition fillet (R1) is provided between the first front end bearing surface (A) and the second front end bearing surface (B); The angle between the first front end bearing surface (A) and the second front end bearing surface (B) θ Set to 120°≤ θ ≤150°.

10. The milling rotor base according to claim 7, characterized in that: A first rear end bearing surface (G) and a second rear end bearing surface (H) are provided on the upper side of the bearing portion (22), and a second transition fillet (R2) is provided between the first rear end bearing surface (G) and the second rear end bearing surface (H); The angle between the first rear end bearing surface (G) and the second rear end bearing surface (H) ω Set to 130°≤ ω ≤160°.

11. A tool holder system, characterized in that: It comprises the milling rotor sleeve and the milling rotor base as claimed in claim 7; The milling rotor gear sleeve is installed in the milling rotor base through the bearing portion (22) and is fixed by a fastener (4).

12. The tool holder system according to claim 11, characterized in that: The fastener (4) is fixed by means of a matching first connecting portion (13) and a second connecting portion (23).

13. The tool holder system according to claim 11, characterized in that: After the milling rotor gear sleeve and the milling rotor base are assembled, the distance h between the edge of the milling rotor base on a side close to the cutter head mounting portion (11) and the milling rotor gear sleeve is ≥1 mm.

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