CN218436539U

CN218436539U - Self-locking type chisel tool rack

Info

Publication number: CN218436539U
Application number: CN202221577949.4U
Authority: CN
Inventors: 苗祥; 秦鹏程
Original assignee: Jiangsu Wuyuan Machinery Manufacturing Co ltd
Current assignee: Jiangsu Wuyuan Machinery Manufacturing Co ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2023-02-03
Anticipated expiration: 2032-06-23

Abstract

The utility model relates to a self-locking chisel holder, which comprises a holder body, wherein the holder body comprises a chisel fixing part and an installation part, the chisel fixing part and the installation part are connected through a transition part, the installation part is a semi-cone and is provided with a central axis, a through hole is arranged in the middle of the holder body along the central axis, the upper part of the installation part is a tensioning part, a clamping and stopping bulge is annularly arranged on the outer side of the installation part, the outer side surface of the clamping and stopping bulge is a semi-cone surface, and a U-shaped notch for providing a contraction space for the tensioning part is arranged on the side wall of the tensioning part; when the mounting part is mounted on the base, the tensioning part is stressed to contract and is clamped with the base; the utility model discloses a from locking-type chisel knife rest can realize not constructing with interrupting, changes high efficiency, practices thrift manpower and materials, can improve the efficiency of engineering, practices thrift the cost.

Description

Self-locking chisel tool holder

Technical Field

The utility model belongs to the technical field of engineering machine tool, mainly relate to a from locking-type chisel knife rest for road surface milling machine.

Background

Cold planers, sometimes also referred to as road mills or road tippers, are machines that typically include a frame supported four-sided by tracked or wheeled drive units. The frame is used to mount the engine, the operator station and the milling drum. The milling drum equipped with cutting tools is rotated by a motor through a suitable interconnection to break up the surface of the road.

Such machines are generally machines with a driven working roll which can be rotated about a horizontal axis and on which a plurality of ground working tools, in particular shear blocks or chisels and in particular round bar chisels, are arranged.

During the actual cutting operation, the milling drum is rotated rapidly and continuously to cut off the ground that has been damaged. During such a cyclic cutting operation, several replaceable chisel holders mounted on the milling drum are regularly subjected to such high-frequency, high-impact and highly vibrating operating conditions in succession. In such severe working conditions, the replaceable chisel holder is usually fixed to the base by means of screws, but the screws are very susceptible to loosening under such high-frequency strong vibrations, and if only one screw becomes loose, the entire milling roller will fail and no construction can be carried out. And be fixed with very many removable chisel knife rest on the working roll, if the not hard up of bolt takes place on a large scale, must pause the construction and go all to the bolt all inspect and fasten once, its consuming time and wasting of force cost are huge, consequently, can design a section and do not use the removable chisel knife rest of fasteners such as bolt, can realize not constructing with the interrupt, practice thrift manpower and materials, will improve the efficiency of engineering greatly, practice thrift the cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a from locking-type chisel knife rest does not use fasteners such as bolt to fix.

The purpose of the utility model is realized like this: a self-locking chisel holder comprises a holder body, wherein the holder body comprises a chisel fixing part and an installation part, the chisel fixing part and the installation part are connected through a transition part, the installation part is a semi-cone and is provided with a central axis, a through hole is formed in the middle of the holder body along the central axis, the upper part of the installation part is a tensioning part, a clamping and stopping bulge is annularly arranged on the outer side of the installation part, the outer side surface of the clamping and stopping bulge is a semi-cone surface, and a U-shaped notch used for providing a contraction space for the tensioning part is formed in the side wall of the tensioning part; when the installation part is installed on the base, the tension part is stressed to contract and is blocked with the base.

Preferably, the part between the bottom of the mounting part and the clamping protrusion is a clamping part, the lower end of the clamping part is provided with a first outer diameter phia, the upper end of the clamping part is provided with a second outer diameter phib, the lower end of the clamping protrusion is provided with a third outer diameter phic, and the upper end of the clamping protrusion is provided with a fourth outer diameter phid.

Preferably, φ a > φ b, φ b < φ c, φ c > φ d.

Preferably, the outer side of the bottom of the mounting part is annularly provided with a relief groove.

Preferably, the U-shaped notch is 30mm to 35mm long and 15mm to 20mm wide.

Preferably, the mounting portion is a half cone with a cone angle of 2 ° to 10 °.

Preferably, the outer side surface of the latching protrusion is a semi-conical surface having a taper angle of 2 ° to 8 °.

The utility model discloses a from locking-type chisel knife rest can realize the construction without stopping, changes high efficiency, practices thrift manpower and materials, can improve the efficiency of engineering, practices thrift the cost.

Drawings

Figure 1 is a left side view of the self-locking chisel holder of the present invention;

figure 2 is a rear view of the self-locking chisel holder of the present invention;

figure 3 is a full cross-sectional view of the self-locking chisel holder of the present invention;

FIG. 4 is a partial view F of FIG. 3;

figure 5 is a view of the self-locking chisel holder of the present invention after being assembled with the base;

fig. 6 is a full sectional view a of fig. 5.

Detailed Description

The following describes the present invention in further detail with reference to the attached drawings.

As shown in fig. 1, the utility model discloses a from locking-type chisel holder, for the metal molding blank obtains through machining, it has chisel sword fixed part 1, installation department 3, lies in transition portion 2 between the two, chisel holder is the cylinder form, has the central axis X to there is a through hole 30 coaxial with central axis X in the center, wherein, installation department 3 has tensioning portion 31, is equipped with a U type breach that is used for providing the shrink space for tensioning portion on the tensioning portion 31 lateral wall, and the diameter of through hole 30 is between phi 20mm to phi 30 mm. The U-shaped notch is 30mm to 35mm long and 15mm to 20mm wide. The chisel holder 1 has a stop surface 34 at the front end thereof, which is in the form of a circular ring surface and on which a chisel is mounted. The transition middle section 24 of the transition part 2 is a cylindrical section, and the upper end surface of the transition middle section is provided with a pair of dismounting parts which comprise a first dismounting surface 20, a second dismounting surface 21, a third dismounting surface 22 and a fourth dismounting surface 23 which are all connected with a transition surface 25. The first outer surface 32 of the mounting portion 3 is disposed adjacent the transition surface 25. The mounting portion 3 has a length L1 ranging between 45mm and 55mm from the transition surface 25 to the terminating surface 33. The mounting portion 3 further comprises a second outer surface 35, a third outer surface 36, a fourth outer surface 37 in the order of the terminating surface 33.

In fig. 2, the tensioning portion 31 provided on the mounting portion 3 is symmetrical with respect to the median plane M of the chisel holder. The second and fourth disassembly faces 21, 23 are arranged symmetrically and parallel with respect to the median division plane M, with a distance a between them, with dimensions ranging from 40mm to 45 mm.

As shown in fig. 3 and 4, the tensioning part 31 comprises a first tensioning surface 31.1 and a second tensioning surface 31.2. The mounting portion 3 has a first outer diameter phia with a size ranging from 40mm to 45mm; a second outer diameter phib, the size range of which is 35mm to 39mm; a third outer diameter phi c, the size range is 40mm to 45mm; and the fourth outer diameter phid is in the size range of 35mm to 39mm. And the size settings satisfy φ a > φ b, φ b < φ c, φ c > φ d simultaneously with each other. The first outer surface 32 has an angle M with the central axis X in the range of 1 ° to 5 ° (i.e., a cone angle of 2 ° to 10 °); the second outer surface 35 has an angle N with the central axis X in the range of 1 ° to 4 ° (i.e., a taper angle of 2 ° to 8 °). The first outer surface 32 of the mounting portion 3 is adjacent to the transition surface 25 and connected with the middle through the relief groove 38, and the relief groove 38 can prevent the mounting portion 3 from breaking due to excessive stress concentration when the stress is applied.

In fig. 5 and 6, in the state that the self-locking chisel holder is completely assembled in the base 4, in the process, the chisel holder is assembled into the accommodating portion 40 of the base 4 along the direction F, the first outer surface 32 and the second outer surface 35 on the mounting portion 3 are contacted with the accommodating portion 40 of the base 4, when the tensioning portion 31 of the chisel holder mounting portion 3 is restrained by the accommodating portion 40, namely, when an external force vertically facing the central axis X direction is generated, due to the elastic property of the metal and the deformation action of the first tensioning surface 31.1 and the second tensioning surface 31.2, the tensioning portion 31 can contract towards the force application direction, namely, the relevant first outer diameter phia and the third outer diameter phic are reduced to be consistent with the inner diameter of the accommodating portion 40, and the size range is 39mm to 44 mm. When the chisel holder is completely removed from the receiving portion 40, the relevant diameter can be restored to the original state.

It can be seen from above that, a from locking-type chisel knife rest of present case need not use fasteners such as bolt just can be with 4 complete and inseparable of base assembly, can realize not constructing with interrupting, practices thrift manpower and materials, will improve the efficiency and the quality of engineering greatly, has practiced thrift engineering cost.

It should be noted that the drawings of the present embodiment are in a very simplified form and all use non-precise ratios, and are only used for convenience and clarity to aid in the description of the embodiments of the present invention.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above list of details is only for the purpose of a concrete description of the feasible embodiments of the present application, they are not intended to limit the scope of the application, and all equivalent embodiments or modifications that do not depart from the technical spirit of the present application are intended to be included within the scope of the present application.

Claims

1. The self-locking chisel holder comprises a holder body, wherein the holder body comprises a chisel fixing part (1) and an installation part (3), the chisel fixing part (1) and the installation part (3) are connected through a transition part (2), and the self-locking chisel holder is characterized in that the installation part (3) is a semi-cone and is provided with a central axis (X), a through hole (30) is formed in the middle of the holder body along the central axis (X), the upper part of the installation part (3) is a tensioning part (31), an outer side ring of the installation part (3) is provided with a clamping and stopping protrusion, the outer side surface of the clamping and stopping protrusion is a semi-conical surface, and a U-shaped notch used for providing a contraction space for the tensioning part (31) is formed in the side wall of the tensioning part (31); when the mounting part (3) is mounted on the base (4), the tensioning part (31) is stressed to contract and is clamped with the base (4).

2. A self-locking chisel holder as set forth in claim 1, wherein the portion between the bottom of the mounting portion (3) and the retaining protrusion is an engagement portion having a first outer diameter phia at a lower end thereof, a second outer diameter phib at an upper end thereof, a third outer diameter phic at a lower end thereof, and a fourth outer diameter phid at an upper end thereof.

3. A self-locking chisel holder as set forth in claim 2, wherein phia > phib, phib < phic, phic > phid.

4. A self-locking chisel holder as set forth in claim 1, characterized in that the bottom outside of the mounting portion (3) is provided with a relief groove (38).

5. A self-locking chisel holder according to claim 1, wherein the U-shaped notch is 30mm to 35mm long and 15mm to 20mm wide.

6. A self-locking chisel holder according to claim 1, characterized in that the mounting portion (3) is a half cone with a cone angle of 2 ° to 10 °.

7. A self-locking chisel holder according to claim 1, wherein the outer surface of the retaining projection is a semi-conical surface with a cone angle of 2 ° to 8 °.