Spiral cutting head

Abstract

The utility model discloses a spiral cutting head, which relates to the technical field of mining equipment, and comprises a cutting head, a cutting arm is sleeved in the rear end of the cutting head, a cutting main shaft is rotatably arranged in the cutting arm, the front end of the cutting head is detachably connected with the cutting main shaft, and the front end of the cutting head is detachably connected with the cutting main shaft. A floating sealing assembly is detachably arranged between the cutting arm and the cutting main shaft, an inner spiral guide groove is formed in the rear end of the cutting head, and an outer spiral guide groove is formed in the outer side of the cutting head; the inner spiral material guide groove is formed in the rear end of the cutting head, the inner spiral material guide groove continuously guides out materials between the cutting head and the cutting arm and turns over the materials, so that the materials are kept loose, the floating sealing assembly is prevented from being extruded, the service life of the sealing assembly is prolonged, the outer spiral material guide groove guides out materials on the outer side of the spiral head, and meanwhile, the service life of the sealing assembly is prolonged. The graphite packing can be prevented from being installed and manufactured on site, the on-site use and maintenance frequency is reduced, and installation and maintenance become simple and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of mining equipment, in particular to a spiral cutting head. Background Art

[0002] In the coal industry, the power for cutting coal by a roadheader is transmitted from the cutting motor to the cutting main shaft, and then from the cutting main shaft to the cutting head. The cutting head rotates and feeds to complete the coal cutting work. During the coal cutting process, the cutting part needs to rotate buried in coal and gangue. It is easy for coal and gangue to enter from the gap between the cutting head and the cutting arm.

[0003] The structure of the traditional cutting head is as Figure 1 and Figure 2 shown. The cutting head 1 and the cutting arm 2 are sealed by an oil seal 7 and a graphite packing 5, and then limited by a packing gland assembly 6. Due to the reasons of machining dimensions and tooling, the packing 5 needs to be installed on site as required. After installation, the clearance needs to be ensured to avoid too small contact clearance, which may cause the motor of the cutting part to be blocked. In addition, the graphite packing 5 has a large wear amount and a short replacement cycle. If it is not replaced in time, it is easy to cause materials to be squeezed in the cutting head, damaging the floating seal 4, and then damaging the bearing and the cutting part. Content of the Utility Model

[0004] Aiming at the above deficiencies of the prior art, the utility model provides a spiral cutting head. An inner spiral material guiding groove is arranged inside the rear end of the cutting head. The inner spiral material guiding groove continuously guides out and turns over the materials between the cutting head and the cutting arm, keeping the materials loose, avoiding squeezing the floating seal assembly, and improving the service life of the seal assembly. The outer spiral material guiding groove guides out the materials on the outer side of the spiral head. At the same time, it can avoid the on-site installation and fitting of the graphite packing, reduce the on-site use and maintenance times, and make the installation and maintenance simple and efficient.

[0005] To achieve the above purposes, the utility model is realized through the following technical solutions: a spiral cutting head, including a cutting head, a cutting arm is sleeved inside the rear end of the cutting head, a cutting main shaft is rotatably arranged inside the cutting arm, the front end of the cutting head is detachably connected to the cutting main shaft, a floating seal assembly is detachably arranged between the cutting arm and the cutting main shaft, an inner spiral material guiding groove is arranged inside the rear end of the cutting head, and an outer spiral material guiding groove is arranged on the outer side of the cutting head.

[0006] Preferably, a protective sleeve is sleeved inside the cutting head and located outside the floating seal assembly.

[0007] Preferably, a pick assembly is arranged on the outer side of the cutting head.

[0008] The utility model provides a spiral cutting head, which has the following beneficial effects:

[0009] 1. Inside the rear end of the cutting head of the present utility model, an inner spiral material guiding groove is provided. The inner spiral material guiding groove continuously guides out and turns over the material between the cutting head and the cutting arm, keeping the material loose, avoiding extrusion of the floating seal assembly, and improving the service life of the seal assembly. The outer spiral material guiding groove guides out the material on the outer side of the spiral head. At the same time, it can avoid on-site installation and fitting of the graphite packing, reduce the on-site use and maintenance times, and make the installation and maintenance simple and efficient.

[0010] 2. Inside the cutting head of the present utility model and outside the floating seal assembly, a protective sleeve is provided. The protective sleeve is sleeved outside the floating seal assembly. Under the protection of the protective sleeve, the material will not contact or extrude the floating seal assembly, so as to prevent the material from damaging the floating seal assembly. Description of the Drawings

[0011] Figure 1 is a cross-sectional view of a traditional cutting head, cutting main shaft and cutting arm;

[0012] Figure 2 is a cross-sectional view of a traditional cutting head;

[0013] Figure 3 is a cross-sectional view of the cutting head, cutting main shaft and cutting arm of the present utility model;

[0014] Figure 4 is a cross-sectional view of the cutting head of the present utility model;

[0015] Figure 5 is a three-dimensional view of the cutting head of the present utility model.

[0016] In the figure: 1. Cutting head; 2. Cutting arm; 3. Cutting main shaft; 4. Floating seal assembly; 5. Packing; 6. Packing gland assembly; 7. Oil seal; 8. Protective sleeve; 9. Inner spiral material guiding groove; 10. Outer spiral material guiding groove; 11. Cutting tooth assembly. Detailed Embodiments

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Such as Figures 3-5As shown in the figure, a spiral cutting head includes a cutting head 1. Inside the rear end of the cutting head 1, a cutting arm 2 is sleeved. A cutting main shaft 3 is rotatably arranged inside the cutting arm 2. The front end of the cutting head 1 is detachably connected to the cutting main shaft 3. A floating seal assembly 4 is detachably arranged between the cutting arm 2 and the cutting main shaft 3. An inner spiral material guiding groove 9 is formed inside the rear end of the cutting head 1, and an outer spiral material guiding groove 10 is formed on the outside of the cutting head 1. A protective sleeve 8 is sleeved outside the floating seal assembly 4 inside the cutting head 1. A cutting tooth assembly 11 is arranged on the outside of the cutting head 1.

[0019] The detailed connection means are well-known technologies in the art. The following mainly introduces the working principle and process, which are as follows:

[0020] According to the attached drawings of the specification Figures 3-5 It can be seen that one end of the cutting main shaft 3 of the present utility model is connected to a cutting motor, and the other end is detachably connected to the cutting head 1. The cutting head 1 and the cutting main shaft 3, the floating seal assembly 4 and the cutting arm 2 are all connected by bolts. When the cutting motor drives the cutting main shaft 3 to rotate, the cutting main shaft 3 drives the cutting head 1 to rotate. The cutting head 1 rotates and works in coal and gangue. An inner spiral material guiding groove 9 is formed inside the rear end of the cutting head 1. When the cutting head 1 rotates, the cutting arm 2 is relatively stationary. The cutting head 1 drives the inner spiral material guiding groove 9 to rotate simultaneously. When the inner spiral material guiding groove 9 rotates, it guides out materials such as coal and gangue between the cutting head 1 and the cutting arm 2, ensuring that the materials entering between the cutting head 1 and the cutting arm 2 are loose, avoiding the extrusion of the floating seal assembly 4, and improving the service life of the floating seal assembly 4. An outer spiral material guiding groove 10 is formed on the outside of the cutting head 1. When the cutting head 1 rotates, the materials fall out from the outer spiral material guiding groove 10. In the present utility model, an inner spiral material guiding groove 9 is formed inside the rear end of the cutting head 1. The inner spiral material guiding groove 9 continuously guides out and turns over the materials between the cutting head 1 and the cutting arm 2, keeping the materials loose, avoiding the extrusion of the floating seal assembly 4, and improving the service life of the seal assembly. The outer spiral material guiding groove 10 guides out the materials on the outside of the spiral head 1. At the same time, it can avoid the on-site installation and fitting of the graphite packing 5, reduce the on-site use and maintenance times, and make the installation and maintenance simple and efficient.

[0021] There is a possible implementation. A protective sleeve 8 is sleeved outside the floating seal assembly 4 inside the cutting head 1. With the protection of the protective sleeve 8, the materials will not contact or squeeze the floating seal assembly 4, so as to prevent the materials from damaging the floating seal assembly 4.

[0022] There is a possible implementation. A cutting tooth assembly 11 is arranged on the outside of the cutting head 1. When the cutting head 1 rotates, it drives the cutting tooth assembly 11 to rotate for work.

[0023] Although embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A spiral cutting head, comprising a cutting head (1), a cutting arm (2) being sleeved inside the rear end of the cutting head (1), a cutting spindle (3) being rotatably arranged inside the cutting arm (2), a front end of the cutting head (1) being detachably connected to the cutting spindle (3), a floating seal assembly (4) being detachably arranged between the cutting arm (2) and the cutting spindle (3), characterized in that: An inner spiral material guide groove (9) is provided inside the rear end of the cutting head (1), and an outer spiral material guide groove (10) is provided outside the cutting head (1).

2. A spiral cutting head according to claim 1, characterized in that: A protective sleeve (8) is provided inside the cutting head (1) and on the outer cover of the floating seal assembly (4).

3. A spiral cutting head according to claim 1, characterized in that: A cutting tooth assembly (11) is arranged on the outer side of the cutting head (1).

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