CN214264807U

CN214264807U - Novel brake mechanism of rotating main shaft

Info

Publication number: CN214264807U
Application number: CN202023336333.1U
Authority: CN
Inventors: 董爱民; 董荣根
Original assignee: Shanghai Jinke Machinery Manufacturing Co ltd
Current assignee: Shanghai Jinke Machinery Manufacturing Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-09-24
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to a novel brake mechanism of a rotary main shaft, which comprises a main shaft box and a main shaft in the main shaft box, wherein the brake mechanism comprises a main shaft brake inner ring, a main shaft upper and lower brake hub, a main shaft upper brake seat, a main shaft lower brake seat, a jacking oblique wedge and an oil cylinder, the main shaft brake inner ring is sleeved on the main shaft, the main shaft upper and lower brake hubs are encircled outside the main shaft brake inner ring, the main shaft upper brake seat and the main shaft lower brake seat are arranged outside the main shaft upper and lower brake hubs and are connected in series through brake pull rods, an inner groove structure is inwards arranged on the bottom surface of the main shaft lower brake seat, two oblique wedge brake blocks are relatively arranged in the inner groove structure, an included angle is formed between the two oblique wedges, the jacking oblique wedge is arranged in the included angle, the upward pushing action of an oil cylinder piston rod through the oil cylinder is used for upward movement in the included angle, the outer ends of the two oblique wedge brake blocks are inwards provided with oblique grooves, the lower ends of the two brake pull rods respectively fall into the two chutes. Has the advantages that: simple structure and convenient operation.

Description

Novel brake mechanism of rotating main shaft

Technical Field

The utility model relates to a machine part processing equipment technical field, in particular to novel arrestment mechanism of rotatory main shaft.

Background

The main shaft of the machine tool is a shaft which drives a workpiece or a cutter to rotate on the machine tool. The main shaft part is generally composed of a main shaft, a bearing, a transmission part (a gear or a belt wheel) and the like, and is mainly used for supporting transmission parts and transmitting movement and torque in a machine; most of the existing common machine tools have large main shaft size and weight, while the common heavy machine tools mostly adopt mechanical braking devices, the braking devices have large volume and complex structure, the braking process is easily affected by radial bias external force to gradually reduce the precision of the main shaft, and the service lives of a main shaft bearing and the main shaft are also reduced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a solve above-mentioned technical problem, provide a simple structure, convenient operation's novel arrestment mechanism.

The technical scheme is that the novel brake mechanism of the rotary spindle comprises a spindle box and a spindle arranged in the spindle box, and is characterized by further comprising a brake mechanism, wherein the brake mechanism comprises a spindle brake inner ring, a spindle upper and lower brake hubs which are of an upper and lower structure and have a two-half structure, a spindle upper brake seat, a spindle lower brake seat, a jacking wedge and an oil cylinder, the spindle brake inner ring is sleeved on the spindle and is connected with the spindle through upper and lower side mounting fixing keys, the spindle upper and lower brake hubs are encircled outside the spindle brake inner ring, the spindle upper brake seat and the spindle lower brake seat are arranged outside the spindle upper and lower brake hubs, and two sides of the spindle upper and lower brake hubs are connected in series through brake pull rods, the spindle lower brake seat is fixedly connected with the box, and the oil cylinder is arranged at the bottom of the spindle lower brake seat, the bottom surface of the main shaft lower brake holding seat is inwards provided with an inner groove structure, two oblique wedge brake blocks are oppositely arranged in the inner groove structure, an included angle is formed between the two oblique wedge brake blocks, the jacking oblique wedge is arranged in the included angle, the upward pushing action of an oil cylinder piston rod of the oil cylinder is used for upward movement in the included angle, two oblique grooves are inwards formed in the outer ends of the oblique wedge brake blocks, the top surfaces of the oblique grooves are outwards enlarged oblique surfaces, the lower ends of the brake pull rods respectively fall into the two oblique grooves, the lower ends of the brake pull rods are also inclined surfaces in contact with the top surfaces of the oblique grooves, and the top ends of the brake pull rods are limited through pull rod nuts.

As a further improvement, the main shaft lower brake base is fixedly connected with the box body through two limiting inner hexagon screws, two waist grooves with the depth of 4mm are symmetrically formed in two sides of the main shaft lower brake base, the two limiting inner hexagon screws respectively penetrate through two sides of the box body and stretch into the waist grooves, gaps with the bottoms of the waist grooves are 0.2mm, and the gaps are locked through locking nuts.

As a further improvement, the jacking wedge is designed to be conical, and the shape of the jacking wedge is matched with the shape of an included angle between the two wedge brake blocks.

As a further improvement, a return spring is further mounted in the wedge braking block through a fixing pin.

As a further improvement, a brake hub releasing spring is further sleeved on the brake pull rod and is positioned between the brake seat on the main shaft and the brake seat under the main shaft.

As a further improvement, the included angle between the two wedge brake blocks is 10 degrees.

As a further improvement, the included angle formed between the top surface of the chute and the horizontal plane is 5 degrees.

As a further improvement, two sides of the upper and lower brake hubs of the main shaft are respectively provided with an anti-rotation positioning pin of the brake hubs.

Advantageous effects

The beneficial effects are that: the brake device has a simple structure and low manufacturing cost, and can be widely applied to the main shaft brake of all mechanical power boxes driven by nonproprietary servo motors; the braking process does not generate radial biased external force on the main shaft, the gradual reduction of the precision of the main shaft caused by the radial biased force on the main shaft is avoided, and the pressure of a hydraulic system can be conveniently adjusted to obtain the size selection of the braking force.

Drawings

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

FIG. 1 is an exploded view of the present invention;

FIG. 2 is a front view of the mounting structure of the present invention;

fig. 3 is a side view of the installation structure of the present invention

Fig. 4 is a sectional view of the portion C-C of fig. 3.

Reference numbers in the figures:

100. spindle head 200, spindle 300, and brake mechanism

301. A main shaft brake inner ring 302, a main shaft upper and lower brake hub 303 and a main shaft upper brake seat

304. Main shaft lower brake base 3041, waist groove 3042 and inner groove structure

305. Jacking inclined wedge 306, oil cylinder 3061 and oil cylinder piston rod

307. Mounting fixing key 308, brake pull rod 309 and limiting socket head cap screw

310. Lock nut 311, tapered brake pad 3111, and chute

312. Pull rod nut 313, fixing pin 314, reset spring

315. The included angle between the contracting brake hub releasing spring a1 and the two wedge brake blocks

a2, the angle formed between the top surface of the chute and the horizontal plane

Detailed Description

In order to further understand and appreciate the structural features and advantages of the present invention, preferred embodiments and the accompanying drawings are described in detail as follows:

as shown in fig. 1 to 4, a novel brake mechanism for a rotating spindle comprises a spindle box 100, a spindle 200 arranged in the spindle box 100, and a brake mechanism 300, wherein the brake mechanism 300 comprises a spindle brake inner ring 301, a spindle upper and lower brake hub 302 which is of a two-half structure of an upper and a lower structure, a spindle upper brake base 303, a spindle lower brake base 304, a jacking wedge 305, and an oil cylinder 306. The spindle braking inner ring 301 is sleeved on the spindle 200 and is connected with the spindle 200 through the upper and lower fixing keys 307, the upper and lower spindle braking hubs 302 surround the outer side of the spindle braking inner ring 301, and two sides of the upper and lower spindle braking hubs 302 are respectively provided with a braking hub rotation-preventing positioning pin (not shown in the figure). The upper spindle brake base 303 and the lower spindle brake base 304 are arranged outside the upper spindle brake hub 302 and the lower spindle brake hub 302, and two sides of the upper spindle brake base and the lower spindle brake hub are connected in series through a brake pull rod 308, the lower spindle brake base 304 is fixedly connected with the box body 100 through two limiting inner hexagonal screws 309, two sides of the lower spindle brake base 304 are symmetrically provided with a waist groove 3041 with the depth of 4mm, the two limiting inner hexagonal screws 309 penetrate through the two sides of the box body 100 respectively and extend into the waist groove 3041, a gap of 0.2mm is formed between the two limiting inner hexagonal screws and the bottom of the waist groove 3041, and the gap is locked through a locking nut 310, so that the lower spindle brake base 304 can move up and down by a certain amount.

The oil cylinder 306 is arranged at the bottom of the lower spindle brake holder 304, an inner groove structure 3042 is formed inwards on the bottom surface of the lower spindle brake holder 304, two inclined wedge brake blocks 311 are oppositely arranged in the inner groove structure 3042, an included angle a1 is formed between the two inclined wedge brake blocks 311, the jacking inclined wedge 305 is designed to be conical and matched with the included angle a1 in shape, the jacking inclined wedge 305 is arranged in the included angle a1, the upward pushing action of an oil cylinder piston rod 3061 of the oil cylinder 306 is used for upward movement in the included angle a1, and the included angle a1 between the two inclined wedge brake blocks 311 is set to be 10 degrees through multiple tests to be optimal selection. The outer ends of the inclined wedge brake blocks 311 are both inwards provided with inclined grooves 3111, the top surfaces of the inclined grooves 311 are inclined surfaces which are outwards expanded, an included angle a2 formed between the top surfaces of the inclined grooves 3111 and the horizontal plane is 5 degrees, the lower ends of the two brake pull rods 308 respectively fall into the two inclined grooves 3111, the contact surfaces of the lower ends of the brake pull rods 308 and the top surfaces of the inclined grooves 3111 are also inclined surfaces, and the top ends of the brake pull rods 308 are limited through pull rod nuts 312.

For the purpose of facilitating the return, a return spring 314 is further attached to the wedge brake 311 via a fixing pin 313. An internal contracting brake hub releasing spring 315 is further sleeved on the brake pull rod 308, and the internal contracting brake hub releasing spring 315 is located between the upper internal contracting brake seat of the main shaft and the lower internal contracting brake seat of the main shaft 303.

The utility model discloses a theory of operation:

firstly, hydraulic oil is input into the oil cylinder 306 through an oil pipe, a piston rod 3061 of the oil cylinder is pushed to move upwards to push the jacking inclined wedge 305, the jacking inclined wedge 305 is conical, the contact surfaces of two inclined wedge brake blocks 311 on two sides of the jacking inclined wedge 305 are inclined surfaces, the inclined wedge brake blocks 311 on two sides are respectively pushed to move outwards, the inclined groove 3111 formed in each inclined wedge brake block 311 and the contact surface of the lower end of the brake pull rod 308 are inclined surfaces of 5 degrees, therefore, the brake pull rod 308 is pulled downwards by outwards moving of the inclined wedge brake blocks 311 for a certain distance, and the brake pull rod 308 fixes the spindle upper brake holder 303 in a certain distance range through the pull rod nut 312, so that the spindle upper and lower brake hubs 302 on the upper half part press the spindle inner brake ring 301 after the pull rod nut 312 presses the spindle upper brake holder 303 to move downwards for a certain distance together. With the continuous outward movement of the wedge brake block 311, the upper and lower spindle brake hubs 302 of the upper half press the inner spindle brake ring 301 more tightly, and at this time, the lower spindle brake seat 304 will inevitably move upward until the lower spindle brake hub 302 of the lower half presses the inner spindle brake ring 301, and at this time, the inner spindle brake ring 301 is pressed vertically and peripherally, so that the upper and lower spindle brake hubs of the two parts tightly hold the inner spindle brake ring 301, and because the inner spindle brake ring 301 is connected with the main spindle 200 through the two symmetrical mounting fixed keys 307 on the main spindle 200, when the inner spindle brake ring 301 is held tightly by the upper and lower spindle brake hubs 302, the rotation of the main spindle 200 is also resisted, and finally the main spindle 200 is forced to brake.

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications of the shapes, structures, features and spirit described in the claims of the present invention should be included in the scope of the present invention.

Claims

1. A novel brake mechanism of a rotary spindle comprises a spindle box and a spindle arranged in the spindle box, and is characterized by also comprising a brake mechanism, wherein the brake mechanism comprises a spindle brake inner ring, a spindle upper and lower brake hubs which are of a vertical structure and have a two-half structure, a spindle upper brake base, a spindle lower brake base, a jacking wedge and an oil cylinder, the spindle brake inner ring is sleeved on the spindle and is connected with the spindle through upper and lower side mounting fixing keys, the spindle upper and lower brake hubs surround the outer side of the spindle brake inner ring, the spindle upper brake base and the spindle lower brake base are arranged on the outer sides of the spindle upper and lower brake hubs and are connected with each other through brake pull rods, the spindle lower brake base is also fixedly connected with a box body, the oil cylinder is arranged at the bottom of the spindle lower brake base, an inner groove structure is arranged inwards on the bottom surface of the spindle lower brake base, two oblique wedge brake blocks are relatively arranged in the inner groove structure, an included angle is formed between the two oblique wedge brake blocks, the jacking oblique wedge is arranged in the included angle and used for upwards moving in the included angle through upwards pushing actions of an oil cylinder piston rod of the oil cylinder, two oblique wedge brake blocks are inwards provided with inclined grooves at the outer ends, the top surfaces of the inclined grooves are inclined planes which are outwards enlarged, the two lower ends of the brake pull rods respectively fall into the two inclined grooves, the lower ends of the brake pull rods are in contact with the top surfaces of the inclined grooves, and the top ends of the brake pull rods are limited through pull rod nuts.

2. The novel brake mechanism of a rotating main shaft according to claim 1, wherein the lower spindle brake base is fixedly connected with the box body through two limiting socket head cap screws, waist grooves with the depth of 4mm are symmetrically formed in two sides of the lower spindle brake base, the two limiting socket head cap screws respectively penetrate through two sides of the box body and extend into the waist grooves, a gap of 0.2mm is formed between the two limiting socket head cap screws and the groove bottoms of the waist grooves, and the gap is locked through locking nuts.

3. The novel brake mechanism of a rotating main shaft is characterized in that the jacking wedge is designed to be conical, and the shape of the jacking wedge is matched with the shape of an included angle between two wedge brake blocks.

4. The novel brake mechanism for a rotary spindle according to claim 1, wherein a return spring is further installed in the tapered wedge brake block by a fixing pin.

5. The novel brake mechanism of a rotating main shaft according to claim 1, wherein a brake drum releasing spring is further sleeved on the brake pull rod, and the brake drum releasing spring is located between the brake base on the main shaft and the brake base under the main shaft.

6. The novel brake mechanism for a rotating main shaft according to claim 1, wherein an included angle between two wedge brake blocks is 10 °.

7. The novel brake mechanism for a rotating spindle according to claim 1, wherein the angle formed between the top surface of the chute and the horizontal plane is 5 °.

8. The novel brake mechanism of a rotating main shaft according to claim 1, wherein two sides of the upper and lower brake hubs of the main shaft are respectively provided with an anti-rotation positioning pin of the brake hubs.