Heavy-duty tool for hard ground

Abstract

The utility model discloses a heavy tool for hard stratum, including support seat, chisel head, locking part. The locking part is from the connecting hole of support seat and is locked to the locking hole of connecting portion, and the locking part is screwed, then the locking part will compress the back of support seat, the end face of chisel head and the hole bottom surface of support seat always do not contact, this design will be pasted between first transmission surface and first support surface, between second transmission surface and second support surface and between third extension surface and lower surface respectively after pasting between third extension surface and lower surface, and chisel head and support seat are connected as integral assembly. The utility model discloses through the cooperation surface of large area, multi -angle, strengthens the support and has increased the stability, can firmly position chisel head, and can simply and quickly replace chisel head, improves relevant operation efficiency and quality, alleviates the labor intensity of operator, and greatly saves construction cost.

Description

Technical Field

[0001] This utility model belongs to the technical field of mechanical operation tools for construction and highway engineering, and specifically relates to a heavy-duty attachment for hard soil layers. Background Technology

[0002] Cold recycling machines are high-efficiency, multi-purpose construction machinery. They are mainly used for milling asphalt concrete pavements and recycling old asphalt pavements after adding asphalt, water, and other materials. They can be used for on-site mixing of base and subbase stabilized soils in highways, urban and rural roads, airports, docks, parking lots, and other projects. They can also be used efficiently for recycling harder water-stabilized layers such as cobblestone water-stabilized layers and water-stabilized sand water-stabilized layers.

[0003] Cold recycling technology is a process that uses specialized cold recycling machinery at room temperature to continuously mill and break up the old pavement structural layers, including the surface layer and part of the base layer, add recycled materials, mix, pave, and compact them. It is a process that reconstitutes a structural layer with a certain load-bearing capacity.

[0004] The milling chamber of the cold recycling machine is equipped with a milling drum that can rotate rapidly. Several cutting tools are fixedly installed on the surface of the drum. The tools are used to mill broken road surfaces and hard geological materials. The harsh working conditions cause the wear and damage of the tools to be quite rapid and severe. As a result, the tools need to be replaced frequently, which prolongs the construction cycle, increases the intensity of manual labor, increases construction costs, and causes great inconvenience.

[0005] Therefore, there is an urgent need for a durable, robust, and easily replaceable heavy-duty attachment for hard surfaces. Utility Model Content

[0006] To address the shortcomings of existing technologies, this utility model provides a heavy-duty attachment for hard surfaces.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0008] This utility model provides a heavy-duty attachment for hard strata, including a support base, a chisel head, and a locking component. The chisel head includes a cutting section, a connecting section, and an extension section. The cutting section is located above the front part of the chisel head, and an alloy head is welded to this part. The connecting section is located in the rear middle part of the chisel head and is a columnar section extending from the chisel head. The connecting section has a locking hole inside. The extension section is located at the bottom of the chisel head and includes several adjacent working surfaces. The chisel head passes through the slot in the support base through the connecting section but does not contact the slot. The locking component locks the chisel head and the support base together.

[0009] Preferably, the cutting portion of the chisel includes at least one stepped surface, which is arranged from top to bottom. The stepped surface forms an angled surface on the chisel and is embedded in the chisel for placing and welding the alloy head.

[0010] Preferably, the connecting part has a central axis A for connecting and fixing with the support seat, the side of the connecting part is the connecting surface, and the axial end face of the connecting part is the end face.

[0011] Preferably, the extension section consists of a first extension surface, a second extension surface, and a third extension surface that extend sequentially from the bottom of the chisel head; the first extension surface and the third extension surface are arranged parallel to the central axis A of the connecting part, and the second extension surface is arranged at an angle to the first extension surface.

[0012] Preferably, a first transmission surface and a second transmission surface are provided at the position where the chisel head intersects with the connecting part. The first transmission surface and the second transmission surface are symmetrically arranged with respect to the midpoint plane M of the chisel head, and the two are arranged at an angle α, with the angle α ranging from 200° to 220°.

[0013] Preferably, the support base is generally inverted T-shaped, with the upper part of the support base serving as a support portion, which has a top surface, a left side surface, and a right side surface. The support base also has a front surface, a back surface, and a dividing plane M1. The front surface is connected to the chisel head, and the front surface has a first support surface and a second support surface. The first support surface and the second support surface are symmetrically arranged with respect to the dividing plane M1, and they are arranged at an angle B, with the angle B ranging from 130° to 170°. The first support surface and the second support surface have slots and connecting holes from front to back. The slots have bottom surfaces, and the first support surface and the second support surface also have clearance grooves. The clearance grooves are connected to the upper and lower ends of the slots, and the connecting holes are coaxially connected to the support base. One end of the locking component passes through the connecting hole and connects to the connecting portion in the slot, while the other end of the locking component is locked against the back surface of the support base.

[0014] Preferably, the lower part of the support base is provided with an extension, which includes a lower support surface at the upper front end, a rear top surface at the upper rear end, a lower support surface at the bottom, a rear side surface at the rear side, and a front side surface at the front side.

[0015] Preferably, in the chisel, when the central axis A of the connecting part coincides with the central axis A1 of the slot in the support, the connecting part is embedded in the slot. Since the distance from the first transmission surface and the second transmission surface of the chisel to the end face is less than the distance from the bottom surface of the hole of the support to the first support surface and the second support surface, the end face of the chisel never contacts the bottom surface of the hole of the support. Since the inner diameter of the slot is greater than the outer diameter of the connecting part, the distance from the third extension surface to the lower side of the slot is less than the distance from the lower support surface to the lower end of the connecting surface, the connecting surface never contacts the inner wall of the slot.

[0016] Compared with the prior art, this utility model has the following advantages:

[0017] This invention strengthens support and increases stability through large-area, multi-angle mating surfaces, enabling the chisel head to be firmly positioned and easily and quickly replaced, thereby improving the efficiency and quality of related operations, reducing the labor intensity of operators, and greatly saving construction costs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of a heavy-duty attachment for hard surfaces according to the present invention;

[0019] Figure 2 This is a schematic diagram of the overall front part of a heavy-duty attachment for hard surfaces according to the present invention;

[0020] Figure 3 for Figure 2 C-axis sectional view;

[0021] Figure 4 This is a schematic diagram of the front part of the chisel head in this utility model;

[0022] Figure 5 This is a side view of the chisel head in this utility model;

[0023] Figure 6 for Figure 4 Sectional view of the center chisel head along the BB direction;

[0024] Figure 7 This is a three-dimensional view of the front of the chisel head in this utility model;

[0025] Figure 8 This is a rear view of the chisel head in this utility model;

[0026] Figure 9 This is a top view of the chisel head in this utility model;

[0027] Figure 10 This is a top view of the support base in this utility model;

[0028] Figure 11This is a front orthographic projection view of the support base in this utility model;

[0029] Figure 12 for Figure 11 A sectional view of the central support along direction AA;

[0030] Figure 13 This is a front perspective view of the support base in this utility model. Detailed Implementation

[0031] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0032] In the description of this utility model, it should be understood that the terms "left," "right," etc., indicating the orientation or positional relationship are based on the accompanying drawings. Figure 1 The orientations or positional relationships shown are for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] like Figures 1 to 3 As shown, this embodiment provides a heavy-duty attachment 1 for hard surfaces, including a support base 3, a chisel head 2 and a locking component 4. The support base 3 and the chisel head 2 are fixed together by the locking component 4.

[0035] like Figure 4 Figure 8 As shown, the chisel head 2 is a metal forging product, and the chisel head 2 is provided with a cutting part 20, a connecting part 22, and an extension section 27. The cutting part 20 is located above the front part of the chisel head 2. The cutting part 20 includes two stepped surfaces, having a first stepped surface 20.2, a second stepped surface 20.3, a third stepped surface 20.4, and a fourth stepped surface 20.5. The two stepped surfaces are arranged from top to bottom, forming two surfaces with an included angle on the chisel head 2, and are embedded in the chisel head 2 for placing and welding the first alloy head 20.1, the second alloy head 21.1, and the third alloy head 21.2.

[0036] In this embodiment, the connecting part 22 is located at the rear middle part of the chisel head 2 and is a columnar segment extending from the chisel head 2. The connecting part 22 has a central axis A, the side of the connecting part 22 is a connecting surface 22.2, the axial end face of the connecting part 22 is an end face 22.3, and the interior of the connecting part 22 is provided with a locking hole 22.1.

[0037] In this embodiment, the extension section 27 is located at the bottom of the chisel head 2 and includes several adjacent working surfaces, namely the first extension surface 27.1, the second extension surface 27.2, and the third extension surface 27.3. The first extension surface 27.1 and the third extension surface 27.3 are arranged parallel to the central axis A of the connecting part 22, and the second extension surface 27.2 is arranged at an angle to the first extension surface 27.1.

[0038] In this embodiment, a first transmission surface 23 and a second transmission surface 24 are provided at the position where the chisel head 2 intersects with the connecting part 22. The first transmission surface 23 and the second transmission surface 24 are symmetrically arranged with respect to the midpoint plane M of the chisel head 2, and they are arranged at an angle α, which ranges from 200° to 220°. In this embodiment, 200°, 210°, or 220° can be selected according to the actual situation. The contour surfaces on the left and right sides of the chisel head 2 are the left protective surface 28 and the right protective surface 29. The front parts of the left protective surface 28 and the right protective surface 29 are respectively provided with a left guide surface 25 and a right guide surface 26.

[0039] like Figures 9 to 12 As shown, the support base 3 is generally inverted T-shaped. The upper part of the support base 3 is the support part 31, which has a top surface 30.8, a left side surface 30.4 and a right side surface 30.3. The part of the support base 3 connected to the chisel head 2 is provided with a first support surface 31.1 and a second support surface 31.2. The support base 3 has a dividing plane M1. The first support surface 31.1 and the second support surface 31.2 are symmetrically arranged with respect to the dividing plane M1, and the two are arranged at an angle B. The angle B ranges from 130° to 170°. In this embodiment, 130°, 150° or 170° can be selected according to the actual situation.

[0040] In this embodiment, the first support surface 31.1 and the second support surface 31.2 are provided with a slot 31.3 and a connecting hole 31.4 from front to back. The slot 31.3 has a bottom surface 31.5. The first support surface 31.1 and the second support surface 31.2 are also provided with a clearance groove 31.7, which is connected to the upper and lower ends of the slot 31.3. The connecting hole 31.4 is coaxially connected to the support base 3.

[0041] In this embodiment, the support base 3 has an extension 30 at its lower part. The extension 30 includes a lower support surface 30.1 at the upper front end, a rear top surface 30.5 at the upper rear end, a lower support surface 30.2 at the bottom, a rear side surface 30.6 at the rear side, and a front side surface 30.7 at the front side.

[0042] like Figures 4 to 8 As shown, the connecting part 22 of the chisel head 2 is used to connect and fix it to the support base 3. The connecting part 22 can extend into the slot 31.3 of the support base 3 for a certain length, but does not contact the slot 31.3.

[0043] exist Figures 1 to 3 In this embodiment, the cutting part of the chisel head 2 has a width W, which ranges from 32 to 37 mm. In this embodiment, 32 mm, 35 mm, or 37 mm can be selected depending on the actual situation. The base of the chisel head 2 has a width W1, which ranges from 52 to 57 mm. In this embodiment, 52 mm, 55 mm, or 57 mm can be selected depending on the actual situation. This design makes the cutting part have stronger penetration power, the base has a longer service life, and protects the support seat 3.

[0044] The working principle of this embodiment will be further explained below:

[0045] The locking component 4 is a fastener. The connecting part 22 is embedded in the slot 31.3. One end of the locking component 4 passes through the connecting hole 31.4 and connects with the locking hole 22.1 of the connecting part 22 in the slot 31.3. The locking component 4 is then tightened. At this time, the other end of the locking component 4 is locked against the back of the support base, thereby fixing the chisel head 2 and the support base 3 into one piece.

[0046] In the chisel head 2, when the central axis A of the connecting part 22 coincides with the central axis A1 of the slot 31.3 in the support seat 3, since the distance from the first transmission surface 23 and the second transmission surface 24 of the chisel head 2 to the end surface 22.3 is less than the distance from the bottom surface 31.5 of the hole in the support seat 3 to the first support surface 31.1 and the second support surface 31.2, the end surface 22.3 of the chisel head 2 and the bottom surface 31.5 of the hole in the support seat 3 never contact each other, so that the first transmission surface 23 and the first support surface 31.1 and the second transmission surface 24 and the second support surface 31.2 respectively fit together. Because the inner diameter of the slot 31.3 is larger than the outer diameter of the connecting part 22, the distance from the third extended surface 27.3 to the lower side of the slot 31.3 is less than the distance from the lower support surface 30.1 to the lower end of the connecting surface 22.2, so that the connecting surface 22.2 and the inner wall of the slot 31.3 never contact each other, thus making the third extended surface 27.3 and the lower support surface 30.1 fit together. The chisel head 2 and the support base 3 are connected as a whole component with a large contact area, and the connection is quite stable, maintaining a durable rigid connection even under severe vibration and impact.

[0047] As can be seen from the above, the heavy-duty attachment for hard strata provided in this embodiment has a large area and multiple angle mating surfaces, which strengthens the support and increases stability. It can firmly position the chisel head and make it easy and quick to replace the chisel head, thereby improving the efficiency and quality of related operations, reducing the labor intensity of operators, and greatly saving construction costs.

[0048] It should be noted that the accompanying drawings in this embodiment are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A heavy-duty attachment for hard surfaces, characterized in that, The device includes a support base (3), a chisel head (2), and a locking component (4). The chisel head (2) includes a cutting part (20), a connecting part (22), and an extension section (27). The cutting part (20) is located above the front part of the chisel head (2), and an alloy head is welded to this part. The connecting part (22) is located in the rear middle part of the chisel head (2). The connecting part (22) is a columnar section extending from the chisel head (2). The connecting part (22) has a locking hole (22.1) inside. The extension section (27) is located at the bottom of the chisel head (2) and includes several adjacent working surfaces. The chisel head (2) passes through the connecting part (22) into the slot (31.3) of the support base (3), but does not contact the slot (31.3). The locking component (4) locks the chisel head (2) and the support base (3) together.

2. The heavy-duty attachment for hard substrates according to claim 1, characterized in that, The cutting part (20) of the chisel (2) includes at least one stepped surface, which is arranged from top to bottom. The stepped surface forms an angled surface on the chisel (2) and is embedded in the chisel (2) for placing and welding the alloy head.

3. A heavy-duty attachment for hard surfaces according to claim 2, characterized in that, The connecting part (22) has a central axis A for connecting and fixing with the support (3). The side of the connecting part (22) is the connecting surface (22.2), and the axial end face of the connecting part (22) is the end face (22.3).

4. A heavy-duty attachment for hard substrates according to claim 3, characterized in that, The extension section (27) consists of a first extension surface (27.1), a second extension surface (27.2), and a third extension surface (27.3) that extend sequentially from the bottom of the chisel head (2). The first extension surface (27.1) and the third extension surface (27.3) are arranged parallel to the central axis A of the connecting part (22), and the second extension surface (27.2) is arranged at an angle to the first extension surface (27.1).

5. A heavy-duty attachment for hard substrates according to claim 4, characterized in that, The chisel head (2) and the connecting part (22) are provided with a first transmission surface (23) and a second transmission surface (24). The first transmission surface (23) and the second transmission surface (24) are symmetrically arranged on the left and right sides of the midpoint plane M of the chisel head (2), and the two are arranged at an angle α, with the angle α ranging from 200 to 220°.

6. A heavy-duty attachment for hard substrates according to claim 5, characterized in that, The support base (3) is generally inverted T-shaped. The upper part of the support base (3) is a support part (31), which has a top surface (30.8), a left side surface (30.4), and a right side surface (30.3). The support base (3) also has a front surface, a back surface (31.6), and a dividing plane M1. The front surface is connected to the chisel head (2). The front surface has a first support surface (31.1) and a second support surface (31.2). The first support surface (31.1) and the second support surface (31.2) are symmetrically arranged with respect to the dividing plane M1, and they are arranged at an angle B, with the angle B ranging from 130° to 170°. The first support surface (31.1) The second support surface (31.2) is provided with a slot (31.3) and a connecting hole (31.4) from front to back. The slot (31.3) has a bottom surface (31.5). The first support surface (31.1) and the second support surface (31.2) are also provided with a clearance groove (31.7). The clearance groove (31.7) is connected to the upper and lower ends of the slot (31.3). The connecting hole (31.4) is coaxially connected to the support base (3). One end of the locking component (4) passes through the connecting hole (31.4) and is connected to the connecting part (22) in the slot (31.3). The other end of the locking component (4) is locked against the back of the support base.

7. A heavy-duty attachment for hard substrates according to claim 6, characterized in that, The support base (3) has an extension (30) at its lower part. The extension (30) includes a lower support surface (30.1) at the upper front end, a rear top surface (30.5) at the upper rear end, a lower support surface (30.2) at the bottom, a rear side surface (30.6) at the rear side, and a front side surface (30.7) at the front side.

8. A heavy-duty attachment for hard substrates according to claim 7, characterized in that, In the chisel (2), when the central axis A of the connecting part (22) coincides with the central axis A1 of the slot (31.3) in the support seat (3), the connecting part (22) is embedded in the slot (31.3). Since the distance from the first transmission surface (23) and the second transmission surface (24) of the chisel (2) to the end surface (22.3) is less than the distance from the bottom surface (31.5) of the hole in the support seat (3) to the first support surface (31.1) and the second support surface (31.2), This ensures that the end face (22.3) of the chisel (2) never contacts the bottom face (31.5) of the hole in the support (3); since the inner diameter of the slot (31.3) is larger than the outer diameter of the connecting part (22), the distance from the third extended surface (27.3) to the lower side of the slot (31.3) is less than the distance from the lower support surface (30.1) to the lower end of the connecting surface (22.2), so that the connecting surface (22.2) never contacts the inner wall of the slot (31.3).

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