CN214350729U

CN214350729U - Pre-tightening tool for disc spring of milling head

Info

Publication number: CN214350729U
Application number: CN202022799065.0U
Authority: CN
Inventors: 史凯霞; 李林杰; 閤春锋; 程乐棋
Original assignee: Wuhan Heavy Duty Machine Tool Group Corp
Current assignee: Wuhan Heavy Duty Machine Tool Group Corp
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-10-08
Anticipated expiration: 2030-11-28

Abstract

The utility model discloses a cutter head belleville spring's pretension frock, include piston, hydro-cylinder body, flange, reset, screw rod, the piston sets up in the hydro-cylinder body, hydro-cylinder body terminal surface flange to be equipped with the oilhole on the hydro-cylinder body, the screw rod is worn to establish in the piston to it is fixed through the nut, be equipped with the piece that resets between flange and the piston. The operation is simple, the universality is strong, and meanwhile, the compression amount and the pretightening force of the disc spring can be controlled by adjusting the stroke of the piston, so that different design requirements can be met.

Description

Pre-tightening tool for disc spring of milling head

Technical Field

The utility model discloses used frock when frock belongs to the assembly lathe especially relates to a cutter head belleville spring's pretension frock.

Background

The disc spring is widely applied to a clamping mechanism of a milling head of a machine tool, and the cutter is loosened in the cutting process.

As shown in figure 1, a main shaft component is a key component of a machine tool, the quality of the main shaft directly influences the machining quality, the broach force is provided by a disc spring during the cutting machining of the machine tool, and the broach force is provided by a hydraulic oil cylinder during broach release. According to the characteristics of the disc spring, the normal cutting of the cutter can be ensured only by accurately determining the spring force required by the disc spring when clamping the cutter, and a certain pretightening force is required during the installation for ensuring the use reliability of the disc spring.

Disclosure of Invention

In order to overcome above-mentioned prior art's weak point, the utility model provides a cutter head belleville spring's pretension frock, easy operation, the commonality is very strong, can control belleville spring's compressive capacity and pretightning force through adjusting the piston stroke simultaneously to can satisfy different design demands.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a cutter head belleville spring's pretension frock, includes piston, hydro-cylinder body, flange, resets, screw rod, the piston sets up in the hydro-cylinder body, hydro-cylinder body terminal surface flange to be equipped with the oilhole on the hydro-cylinder body, the screw rod is worn to establish in the piston to it is fixed through the nut, be equipped with the piece that resets between flange and the piston.

In the above technical scheme, the reset piece includes a spring and a guide rod, one end of the guide rod is connected with the piston, the other end of the guide rod penetrates through the flange, and the spring is sleeved outside the guide rod.

In the above technical solution, the guide rod is a guide screw.

In the above technical scheme, the flange is connected with the oil cylinder body through a connecting screw.

In the technical scheme, an O-shaped sealing ring is arranged between the oil cylinder body and the piston.

In the technical scheme, the nut is sleeved with an outer hexagonal tool for disassembly.

The utility model has the advantages that: the operation is simple, the universality is strong, and meanwhile, the compression amount and the pretightening force of the disc spring can be controlled by adjusting the stroke of the piston, so that different design requirements can be met.

Drawings

FIG. 1 is a schematic structural diagram of a right-angle milling head of a numerical control floor type boring and milling machine.

Fig. 2 is a cross-sectional view of the present invention.

Fig. 3 is a use view of the present invention.

Wherein: 1. the novel hydraulic oil cylinder comprises a main shaft, 2 a pull rod, 3 a disc spring, 4 a gear, 5 a flat key, 6 a milling head, 7 an outer hexagonal tool, 8 a flange, 9 an inner hexagonal socket head screw, 10 a hexagonal socket head screw, 11 a compression spring, 12 an I-shaped hexagonal nut, 13 an oil cylinder body, 14 an O-shaped sealing ring, 15 a piston and 16 a screw rod.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments.

As shown in figure 1, a pull rod 2 in a main shaft 1 is provided with a disc spring 3 outside the pull rod 2, the front part of the disc spring is provided with a flat key 5, and a gear 4 is sleeved at the front end of the main shaft 1.

The pre-tightening tool for the disc spring of the milling head, as shown in fig. 2 and 3, comprises a piston 15, a cylinder 13, a flange 8, a reset piece and a screw 16, wherein the piston 15 is arranged in the cylinder 13, the end surface of the cylinder 13 is connected with the flange 8, an oil hole is formed in the cylinder 13, the screw 16 is arranged in the piston 15 in a penetrating manner and is fixed through a nut, and the reset piece is arranged between the flange 8 and the piston 15.

In the above technical scheme, the reset piece includes compression spring 11 and guide bar, and this guide bar one end is connected with the piston, and the flange is passed to the other end, and the spring housing is established outside the guide bar.

In the above technical solution, the guide rod is a guide screw. The guide screw is a socket head cap screw 9.

In the above technical scheme, the flange is connected with the oil cylinder body through a connecting screw. The connecting screw is a hexagonal socket head cap screw 10.

In the technical scheme, the nut is sleeved with an outer hexagonal tool 7 for disassembly. The nut adopts an I-shaped hexagon nut 12.

The pull rod 2 in the milling head 6 is connected to a screw rod 16 of an oil cylinder body 13 through threads, the screw rod 16 and a piston 15 are fixed through an I-shaped hexagon nut 12, an oil hole is formed between the piston 15 and the oil cylinder body 13, a flange 8 is fixed to the oil cylinder body 13 through a hexagon socket head cap screw 10, the flange 8 and the piston 15 are connected through an inner hexagon socket head cap screw 9, a compression spring 11 is sleeved on the inner hexagon socket head cap screw 9 to press the piston 15 on the oil cylinder body 13, and an outer hexagon tool 7 is sleeved on the I-shaped hexagon nut 12 and used for assembling and disassembling the I-shaped hexagon nut 12.

An O-ring 14 is provided between the piston 15 and the cylinder block 13.

The utility model discloses the frock, when needs carry out the pretension to belleville spring, input hydraulic oil in toward the oilhole, under the effect of oil pressure, piston 15 drives I type

hexagon nut

12 and 16 backward movements of screw rod to it also moves backward to drive the pull rod. Therefore, the pull rod base generates pressure on the disc spring through the flat key, and thereby the disc spring is pre-tightened.

After the pre-tightening is finished, under the action of the spring force of the compression spring 11 between the flange 8 and the piston 15, hydraulic oil between the piston 15 and the oil cylinder body 13 is extruded out, and the piston 15 returns.

In order to ensure that the tool can work efficiently and conveniently, the precision error of a single part is strictly controlled in the manufacturing process of the tool, and strict requirements are also met for the matching of different parts. The roughness, cylindricity, axiality etc. to the part surface all have the restriction of different degrees, for the resistance that receives when reducing the piston motion, carried out polishing treatment to the hydro-cylinder body inner chamber. Meanwhile, clearance fit is required between the piston and the oil cylinder body and between the flange and the oil cylinder body.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. The utility model provides a cutter head belleville spring's pretension frock which characterized by: including piston, hydro-cylinder body, flange, piece, the screw rod that resets, the piston sets up in the hydro-cylinder body, hydro-cylinder body terminal surface flange to be equipped with the oilhole on the hydro-cylinder body, the screw rod is worn to establish in the piston to it is fixed through the nut, be equipped with the piece that resets between flange and the piston.

2. The pre-tightening tool for the disc spring of the milling head as set forth in claim 1, wherein: the reset piece comprises a spring and a guide rod, one end of the guide rod is connected with the piston, the other end of the guide rod penetrates through the flange, and the spring is sleeved outside the guide rod.

3. The pre-tightening tool for the disc spring of the milling head as set forth in claim 2, wherein: the guide rod is a guide screw.

4. The pre-tightening tool for the disc spring of the milling head as set forth in claim 1, wherein: the flange is connected with the oil cylinder body through a connecting screw.

5. The pre-tightening tool for the disc spring of the milling head as set forth in claim 1, wherein: the nut overcoat is equipped with the outer hexagonal frock that is used for dismantling.

6. The pre-tightening tool for the disc spring of the milling head as set forth in claim 1, wherein: an O-shaped sealing ring is arranged between the oil cylinder body and the piston.