Combined type milling and planing tool bit

Abstract

The utility model discloses a combined type milling and planing tool bit which comprises a milling drum body and a milling and planing tool bit body, the milling drum body is detachably connected with the milling and planing tool bit body, the milling and planing tool bit body comprises a tooth head, a tooth body and a tooth root, a limiting assembly is arranged in the tooth root, the limiting assembly comprises a cavity formed in the tooth root, and the tooth head and the tooth body are arranged in the cavity. Square grooves are formed in the cavity at equal intervals, arc-shaped blocks are slidably connected into the square grooves, limiting rods are fixedly connected to one ends of the arc-shaped blocks, one ends of the limiting rods extend out of the tooth roots, driving assemblies are arranged outside the tooth roots, the limiting rods are sleeved with second springs, and the driving assemblies enable the arc-shaped blocks to slide in the square grooves. And the second spring is in a compressed state, so that the limiting rod moves towards the outside of the tooth root, and the tooth root is fixed on the milling drum body, thereby effectively avoiding the defect that the tooth root is difficult to take down once being damaged due to threaded connection, improving the replacement speed of the tool bit, and greatly improving the working efficiency of the milling machine.

Description

Technical Field

[0001] The utility model relates to a milling cutter head, and more specifically, to a combined milling cutter head. Background Technique

[0002] The road milling machine is one of the main types of asphalt pavement maintenance construction machinery, mainly used for removing bumps, oil waves, reticulations, ruts, etc. on the asphalt concrete surface layer of highways, urban roads, etc. Milling the damaged old paving layer with a road milling machine and then laying a new surface layer is a most economical modern maintenance method. Because of its high working efficiency, simple construction process, easy control of milling depth, convenient and flexible operation, good maneuverability, and the ability to directly recycle the milled old materials, it is widely used in urban municipal roads and highway maintenance projects.

[0003] When the milling machine works, it drives the milling drum to rotate at a high speed through mechanical or hydraulic transmission, and cuts the road surface through the milling cutter heads installed on the milling drum to achieve the purpose of milling. Therefore, the milling cutter heads of the milling machine are subject to certain impacts from the road surface and abrasive wear of asphalt concrete when milling the road surface. They are the main wear-resistant and consumable parts during milling. The outer surface of the steel body head of the existing milling cutter heads is generally composed of a smooth cylindrical surface and a conical surface.

[0004] At present, the existing cutter heads are fixed on the milling drum by means of threaded connection. If the cutter head breaks, the broken part will be inside the milling drum. However, it is too cumbersome for personnel to take out the broken part from the milling drum, which greatly affects the speed of cutter head replacement and at the same time affects the working efficiency of the milling machine.

[0005] In view of the problems in the related technology, no effective solution has been proposed yet. Content of the Utility Model

[0006] In view of the problems in the related technology, the utility model proposes a combined milling cutter head to overcome the above-mentioned technical problems existing in the existing related technology.

[0007] For this reason, the specific technical solution adopted by the utility model is as follows:

[0008] A combined milling cutter head includes a milling drum body and a milling cutter head body. The milling drum body is fixedly connected with tool holders at equal intervals. An installation hole is formed in the tool holder, and the milling cutter head body is detachably connected in the installation hole. The milling cutter head body includes a tooth head, a tooth body, and a tooth root. The top part of the tooth body is the tooth head, and the tail end part of the tooth body is the tooth root. A limiting component is arranged in the tooth root. The limiting component includes a cavity formed inside the tooth root. Square grooves are formed at equal intervals on the inner surface of the cavity. An arc-shaped block is slidably connected in the square groove. Sliders are fixedly connected to both sides of the outer surface of the arc-shaped block. Slide grooves are formed on both sides of the inner surface of the square groove, and the slide grooves are slidably connected with the sliders. A limiting rod is fixedly connected to one end of the arc-shaped block, and one end of the limiting rod extends outside the tooth root. A driving component is arranged outside the tooth root. A second spring is sleeved on the limiting rod, and both ends of the second spring are fixedly connected with the arc-shaped block and the inner wall of the square groove respectively.

[0009] Further, in order to enable the arc-shaped block to slide in the square groove, the driving component includes side grooves symmetrically formed at both ends of the outer surface of the tooth root. A moving block is slidably connected in the side groove. The side groove communicates with the cavity, and a moving circular block is slidably connected in the cavity.

[0010] Further, in order to enable the moving circular block to slide synchronously with the moving block, a connecting block is slidably connected at the communicating part of the side groove and the cavity. Both ends of the connecting block are fixedly connected with the moving block and the moving circular block respectively.

[0011] Further, in order to enable the moving circular block to automatically rebound, a first spring is fixedly connected to the center of the top end of the inner surface of the cavity, and the bottom end of the first spring is fixedly connected with the moving circular block.

[0012] Further, in order to facilitate the installation of the milling cutter head body in the installation hole, the installation hole matches the tooth root.

[0013] Further, in order to fixedly install the tooth root in the installation hole, limiting holes are formed at equal intervals on the inner surface of the installation hole, and the limiting holes match the limiting rods.

[0014] Further, in order to increase the friction between the arc-shaped block and the moving circular block, a friction pad is fixedly connected to the other end of the arc-shaped block.

[0015] The beneficial effects of the present utility model are:

[0016] 1. By sliding the moving block in the side groove and sliding the moving circular block towards the top of the cavity, the sliding of the moving circular block compresses the first spring. As the moving circular block moves, the second spring is released, causing the arc-shaped block to slide in the square groove and the limiting rod to slide into the square groove. When the limiting rod is flush with the outside of the tooth root, place the tooth root in the mounting hole and align the limiting rod with the limiting hole. Release the moving block. At this time, the first spring automatically rebounds, driving the moving circular block to slide towards the bottom of the cavity. The sliding of the moving circular block causes the arc-shaped block to slide in the square groove and compresses the second spring, thereby causing the limiting rod to move into the limiting hole, and further fixing the tooth root in the mounting hole. This effectively avoids the drawback of using threaded connections, which are not easily removed once damaged. At the same time, it improves the replacement speed of the cutter head and greatly improves the working efficiency of the milling machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0018] Figure 1 is a schematic structural diagram of a combined milling cutter head according to an embodiment of the present invention;

[0019] Figure 2 is an expanded structural diagram of a combined milling cutter head according to an embodiment of the present invention;

[0020] Figure 3 is a cross-sectional view of the milling cutter head body in a combined milling cutter head according to an embodiment of the present invention;

[0021] Figure 4 is a top cross-sectional view of the milling cutter head body in a combined milling cutter head according to an embodiment of the present invention.

[0022] In the figure:

[0023] 1. Milling drum body; 2. Tool holder; 3. Mounting hole; 4. Limiting hole; 5. Milling cutter head body; 6. Tooth head; 7. Tooth body; 8. Tooth root; 9. Cavity; 10. Moving circular block; 11. First spring; 12. Side groove; 13. Moving block; 14. Connecting block; 15. Square groove; 16. Arc-shaped block; 17. Slide block; 18. Slide groove; 19. Limiting rod; 20. Second spring; 21. Friction pad. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] According to an embodiment of the present invention, a combined milling cutter head is provided.

[0026] Embodiment 1;

[0027] As Figures 1 - 4 shown, the combined milling cutter head according to the embodiment of the present invention includes a milling drum body 1 and a milling cutter head body 5. Knife holders 2 are fixedly connected to the milling drum body 1 at equal intervals. An installation hole 3 is provided in the knife holder 2. A milling cutter head body 5 is detachably connected in the installation hole 3. The milling cutter head body 5 includes a tooth head 6, a tooth body 7, and a tooth root 8. The top part of the tooth body 7 is the tooth head 6, and the tail part of the tooth body 7 is the tooth root 8. The tooth root 8 matches the installation hole 3. Limiting holes 4 are provided at equal intervals on the inner surface of the installation hole 3. A limiting component is provided inside the tooth root 8. The limiting component includes a cavity 9 opened inside the tooth root 8. Square grooves 15 are provided at equal intervals on the inner surface of the cavity 9. An arc-shaped block 16 is slidably connected in the square groove 15. In order to make the arc-shaped block 16 slide stably in the square groove 15, sliding blocks 17 are fixedly connected to both sides of the outer surface of the arc-shaped block 16. Sliding grooves 18 are provided on both sides of the inner surface of the square groove 15. The sliding grooves 18 are slidably connected to the sliding blocks 17. A limiting rod 19 is fixedly connected to one end of the arc-shaped block 16. The limiting rod 19 matches the limiting hole 4. One end of the limiting rod 19 extends outside the tooth root 8. A driving component is provided outside the tooth root 8. The driving component includes side grooves 12 symmetrically opened at both ends of the outer surface of the tooth root 8. A moving block 13 is slidably connected in the side groove 12. The side groove 12 communicates with the cavity 9. A moving circular block 10 is slidably connected in the cavity 9. A connecting block 14 is slidably connected at the communicating part between the side groove 12 and the cavity 9. Both ends of the connecting block 14 are fixedly connected to the moving block 13 and the moving circular block 10 respectively. A first spring 11 is fixedly connected to the center of the top of the inner surface of the cavity 9. The first spring 11 has a certain elasticity. The bottom end of the first spring 11 is fixedly connected to the moving circular block 10.

[0028] Embodiment 2;

[0029] Please refer to Figures 1 - 4, in order to increase the friction between the arc-shaped block 16 and the moving circular block 10, a friction pad 21 is fixedly connected to the other end of the arc-shaped block 16. A second spring 20 is sleeved on the limiting rod 19. The second spring 20 has a certain elasticity. The two ends of the second spring 20 are respectively fixedly connected to the arc-shaped block 16 and the inner wall of the square groove 15. And the elasticity of the second spring 20 is less than that of the first spring 11. The bottom end of the moving circular block 10 is a slope. When the second spring 20 is in the released state, the size enclosed by the arc-shaped blocks 16 is larger than the size of the slope at the bottom end of the moving circular block 10. By sliding the moving block 13 in the side groove 12 and making the moving circular block 10 slide towards the top end of the cavity 9, the sliding of the moving circular block 10 makes the first spring 11 in a compressed state. As the moving circular block 10 moves, the second spring 20 is released, causing the arc-shaped block 16 to slide in the square groove 15 and the limiting rod 19 to slide into the square groove 15. When the limiting rod 19 is flush with the outside of the tooth root 8, place the tooth root 8 in the mounting hole 3 and align the limiting rod 19 with the limiting hole 4. Then release the moving block 13. At this time, the first spring 11 automatically rebounds, driving the moving circular block 10 to slide towards the bottom end of the cavity 9. The sliding of the moving circular block 10 makes the arc-shaped block 16 slide in the square groove 15 and the second spring 20 in a natural state is in a compressed state, causing the limiting rod 19 to move into the limiting hole 4 and fixing the tooth root 8 in the mounting hole 3, effectively avoiding the disadvantage that it is not easy to remove once damaged when using threaded connection. At the same time, the replacement speed of the cutter head is increased, and the working efficiency of the milling machine is greatly improved.

[0030] In order to facilitate the understanding of the above technical solutions of the present invention, the working principle or operation method of the present invention in the actual process will be described in detail below.

[0031] In actual application, first, slide the two moving blocks 13 in the side grooves 12 at the same time. The sliding of the moving blocks 13 makes the moving circular block 10 slide towards the top end of the cavity 9. The sliding of the moving circular block 10 makes the first spring 11 in a compressed state. Secondly, as the moving circular block 10 moves, the compressed second spring 20 is released, causing the arc-shaped block 16 to slide in the square groove 15 and the limiting rod 19 to slide into the square groove 15. When the limiting rod 19 is flush with the outside of the tooth root 8, then place the tooth root 8 in the mounting hole 3 and align the limiting rod 19 with the limiting hole 4. Release the moving block 13. At this time, the compressed first spring 11 automatically rebounds, driving the moving circular block 10 to slide towards the bottom end of the cavity 9. The sliding of the moving circular block 10 makes the arc-shaped block 16 slide in the square groove 15 and the second spring 20 in a natural state is in a compressed state, causing the limiting rod 19 to move into the limiting hole 4 and fixing the tooth root 8 in the mounting hole 3, effectively avoiding the disadvantage that it is not easy to remove once damaged when using threaded connection. At the same time, the replacement speed of the cutter head is increased, and the working efficiency of the milling machine is greatly improved.

[0032] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A combined milling cutter head, comprising a milling drum body (1) and a milling cutter head body (5), characterized in that, On the milling drum body (1), tool holders (2) are fixedly connected at equal intervals. An installation hole (3) is formed in the tool holder (2), and a milling cutter head body (5) is detachably connected in the installation hole (3). The milling cutter head body (5) includes a tooth head (6), a tooth body (7), and a tooth root (8). The top part of the tooth body (7) is the tooth head (6), and the tail end part of the tooth body (7) is the tooth root (8). A limiting component is arranged inside the tooth root (8). The limiting component includes a cavity (9) formed inside the tooth root (8). Square grooves (15) are formed at equal intervals on the inner surface of the cavity (9). An arc-shaped block (16) is slidably connected in the square groove (15). Sliders (17) are fixedly connected to both sides of the outer surface of the arc-shaped block (16). Slide grooves (18) are formed on both sides of the inner surface of the square groove (15). The slide grooves (18) are slidably connected to the sliders (17). A limiting rod (19) is fixedly connected to one end of the arc-shaped block (16). One end of the limiting rod (19) extends outside the tooth root (8). A driving component is arranged outside the tooth root (8). A second spring (20) is sleeved on the limiting rod (19). Both ends of the second spring (20) are fixedly connected to the arc-shaped block (16) and the inner wall of the square groove (15) respectively.

2. The combined milling cutter head according to claim 1, wherein, The driving component includes side grooves (12) symmetrically formed at both ends of the outer surface of the tooth root (8). A moving block (13) is slidably connected in the side groove (12). The side groove (12) communicates with the cavity (9). A moving circular block (10) is slidably connected in the cavity (9).

3. The modular milling cutter head according to claim 2, wherein, A connecting block (14) is slidably connected at the communicating part between the side groove (12) and the cavity (9). Both ends of the connecting block (14) are fixedly connected to the moving block (13) and the moving circular block (10) respectively.

4. The combined milling cutter head according to claim 3, characterized in that, A first spring (11) is fixedly connected to the center of the top end of the inner surface of the cavity (9). The bottom end of the first spring (11) is fixedly connected to the moving circular block (10).

5. The modular milling cutter head according to claim 1, wherein, The installation hole (3) matches the tooth root (8).

6. The modular milling cutter head according to claim 5, wherein, Limiting holes (4) are formed at equal intervals on the inner surface of the installation hole (3). The limiting holes (4) match the limiting rods (19).

7. The combined milling cutter head according to claim 1, wherein, A friction pad (21) is fixedly connected to the other end of the arc-shaped block (16).

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