CN211277559U

CN211277559U - Hydraulic gear shifting device of numerical control machine tool

Info

Publication number: CN211277559U
Application number: CN201921408302.7U
Authority: CN
Inventors: 胡正兵
Original assignee: Dalian Chuandong Precision Manufacturing Co ltd
Current assignee: Dalian Chuandong Precision Manufacturing Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-08-18
Anticipated expiration: 2029-08-27

Abstract

The utility model relates to a digit control machine tool technical field just discloses a digit control machine tool hydraulic pressure gear shifting device, this digit control machine tool hydraulic pressure gear shifting device, including the hydro-cylinder body, hydro-cylinder body upper end passes through screw accordant connection with the gear box, hydro-cylinder body internally mounted has the piston, the outside of hydro-cylinder body is equipped with a plurality of guide arms, and the lower extreme of guide arm and piston is connected with the shift fork, the upper end of piston is connected with the connecting rod, and the connecting rod runs through the gear box, the nearly switch of a plurality of montages is installed. This digit control machine tool hydraulic pressure gear shifting device adopts guide arm and hydro-cylinder to be connected integrative form, increases the radial rigidity when the shift fork reciprocates, prevents that the gear from appearing slope or card in the motion process and dying etc. increases the stability of gear shifting action, improves the gear shifting precision, separates operating gear and the gear of not working simultaneously, has reduced the noise and the vibration that gear friction produced, increases the life of device.

Description

Hydraulic gear shifting device of numerical control machine tool

Technical Field

The utility model relates to a digit control machine tool technical field specifically is a digit control machine tool hydraulic pressure gear shifting device.

Background

The numerical control machine tool has wide process range and strong process capability, so a transmission system of the numerical control machine tool is required to have a wider speed regulation range to ensure that more reasonable cutting amount can be selected during processing, thereby obtaining the best processing quality and productivity.

In order to realize two cutting characteristics of low-speed large torque and high-speed high precision in the machining process of the numerical control machine tool, the reduction gearbox needs to be provided with a gear shifting mechanism. At present, a plurality of machine tools adopt a hydraulic oil cylinder and a shifting fork to be connected to drive a sliding gear to move for shifting. Because the hydraulic oil cylinder and the sliding gear are not coaxial, the sliding gear is subjected to overturning moment in the moving process, so that the sliding gear is inclined in the moving process, the gear shifting precision and the gear shifting stability are influenced, and the gear shaving phenomenon can be seriously caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a digit control machine tool hydraulic pressure gearshift has solved that traditional digit control machine tool gearshift speed governing scope is limited, and vibration and noise are great and hydraulic cylinder link to each other with the shift fork of shifting, drive the motion of sliding gear and shift, owing to receive the moment of overturning, and lead to sliding gear to incline in the motion process, influence the precision of shifting and shift stably, reduce lathe life's problem.

(II) technical scheme

For realizing above-mentioned noise abatement and vibration, improve the purpose of shifting stably and precision, the utility model provides a following technical scheme: a hydraulic gear shifting device of a numerical control machine tool comprises an oil cylinder body, wherein the upper end of the oil cylinder body is in threaded connection with a gearbox body through screws, a piston is arranged inside the oil cylinder body, a plurality of guide rods are arranged on the outer side of the oil cylinder body, a guide rod end cover fixed by guide rod screws is arranged at the lower end of each guide rod, a first oil inlet is formed in the bottom of the oil cylinder body, a second oil inlet is formed in the top of the oil cylinder body, the guide rods are arranged around the piston and are connected with the oil cylinder body, shifting forks are connected with the lower ends of the guide rods and the piston, a connecting rod is connected with the upper end of the piston and penetrates through the gearbox body, a plurality of assembling proximity switches are arranged on the upper end face of the gearbox body, contacts are arranged at one ends of the proximity switches, which are close to, the first oil inlet is in threaded connection with the cavity end cover through a screw.

Preferably, the piston is vertically movable in the cylinder body and penetrates through the cavity.

Preferably, the number of the guide rods is two, and the guide rods are symmetrically arranged on two sides of the piston.

Preferably, each guide rod is provided with one guide rod end cover, and the lower end of each guide rod is fixedly arranged on the shifting fork through the guide rod end cover.

Preferably, each guide rod end cover is connected with the shifting fork through a guide rod screw.

Preferably, the number of the proximity switches is two, and the two proximity switches are arranged in parallel up and down.

Preferably, the diameter of the upper end of the connecting rod is greater than the diameter of the rest of the connecting rod, and the upper end of the connecting rod can be close to the contact of the proximity switch.

(III) advantageous effects

Compared with the prior art, the utility model provides a digit control machine tool hydraulic pressure gear shifting device possesses following beneficial effect:

(1) this digit control machine tool hydraulic pressure gear shifting device adopts guide arm and hydro-cylinder to be connected, through hydraulic cylinder control connecting rod and proximity switch's state, realizes the transform of gear, separates operating gear and out of work gear simultaneously, has reduced noise and vibration that gear friction produced, increases the life of device.

(2) This digit control machine tool hydraulic pressure gear shifting device, the guide arm is connected integratively with the hydro-cylinder, increases the radial rigidity when the shift fork reciprocates, prevents that the gear that slides from appearing slope or card dead etc. in the motion process, increases the stability of gear shifting action, improves the gear shifting precision.

Drawings

FIG. 1 is a schematic structural diagram of a hydraulic shifting device of a numerical control machine;

FIG. 2 is a schematic structural view of a hydraulic cylinder;

fig. 3 is a perspective view of the hydraulic cylinder.

Wherein: 1. a cylinder body of the oil cylinder; 2. a guide bar; 3. a piston; 4. a first oil inlet; 5. a guide rod end cover; 6. A leader screw; 7. a shifting fork; 8. a chamber end cap; 9. a chamber; 10. a screw; 11. a gearbox body; 12. A proximity switch; 13. a contact; 14. a connecting rod; 15. a second oil inlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the utility model provides a hydraulic gear shifting device of a numerical control machine, which comprises an oil cylinder body 1, wherein the upper end of the oil cylinder body 1 is in threaded connection with a gear box body 11 through a screw 10, a piston 3 is arranged in the oil cylinder body 1, a plurality of guide rods 2 are arranged on the outer side of the oil cylinder body 1, the number of the guide rods 2 is two, the two guide rods are symmetrically arranged on two sides of the piston 3, a guide rod end cover 5 fixed by a guide rod screw 6 is arranged at the lower end of each guide rod 2, each guide rod 2 is provided with one guide rod end cover 5, the lower end of each guide rod 2 is fixedly arranged on a shifting fork 7 through the guide rod end cover 5, each guide rod end cover 5 is connected with the shifting fork 7 through the guide rod screw 6, when hydraulic oil pushes the piston 3 to move up and down, first oil inlet 4 has been seted up to the bottom of cylinder body 1, the top of cylinder body is equipped with second oil inlet 15, guide arm 2 around install in piston 3 all around and be connected with cylinder body 1, guide arm 2 and the lower extreme of piston 3 is connected with shift fork 7, guide arm 2 is connected integratively with the hydro-cylinder, increases the radial rigidity when shift fork 7 reciprocates, prevents that the sliding gear from appearing slope or card extremely etc. in the motion process, increases the stability of gear shift action, improves the gear shift precision, the upper end of piston 3 is connected with connecting rod 14, the diameter of the upper end of connecting rod 14 is greater than the rest diameter of connecting rod 14, the upper end of connecting rod 14 can be close to contact 13 on proximity switch 12, contact 13 on each proximity switch 12 can be close to the upper end of connecting rod 14 to this detection that is used for proximity switch 12 to hydraulic cylinder position, thereby detecting the positions of high and low gears, the connecting rod 14 penetrates through the gear box body 11, a plurality of groups of proximity switches 12 are arranged on the upper end surface of the gear box body 11, the number of the proximity switches 12 is two, the proximity switches are arranged in parallel up and down, one end of each proximity switch 12, which is close to the connecting rod 14, is provided with a contact 13, the contact is connected with the oil cylinder by adopting a guide rod 2, the change of the gear is realized by controlling the states of the connecting rod and the proximity switch 12 through the hydraulic oil cylinder, meanwhile, the working gear is separated from the non-working gear, so that the noise and vibration generated by the friction of the gears are reduced, the service life of the device is prolonged, the piston 3 is positioned in the chamber 9, the piston 3 can move up and down in the cylinder body 1 and penetrate through the chamber 9, a cavity end cover 8 is installed at the lower end opening of the cavity 9, and the first oil inlet 4 is in threaded connection with the cavity end cover 8 through a screw.

When using, through increasing guide arm 2 in the digit control machine tool hydraulic pressure gearshift cylinder body outside, make guide arm 2 and hydraulic cylinder form an organic whole, piston 3 and guide arm 2 are connected simultaneously on shift fork 7, piston 3 drives shift fork 7 and guide arm 2 and moves simultaneously when reciprocating, when the 15 oil intakes of second oil inlet of cavity 9, promote piston 3 and move down, piston 3 drives shift fork 7, guide arm 2 and connecting rod 14 move down, shift fork 7 drives the sliding gear and moves down and accomplishes the action of shifting gears, proximity switch 12's downside contact 13 response salient point on the connecting rod 14, detect out the gear with this and be in the downside position. When oil enters a first oil inlet 4 of the cavity 9, the piston 3 is pushed to move upwards, the piston 3 drives the shifting fork 7, the guide rod 2 and the connecting rod 14 to move upwards, and the shifting fork 7 drives the sliding gear to move upwards to complete gear shifting. The upper contact 13 of the proximity switch 12 senses the protrusion point of the link lever 14, thereby detecting that the shift position is in the upper position.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a digit control machine tool hydraulic pressure gear shifting device, includes hydro-cylinder body (1), its characterized in that: the gearbox is characterized in that the upper end of the oil cylinder body (1) is in threaded connection with the gearbox body (11) through a screw (10), a piston (3) is arranged inside the oil cylinder body (1), a plurality of guide rods (2) are arranged on the outer side of the oil cylinder body (1), guide rod end covers (5) fixed by guide rod screws (6) are arranged at the lower ends of the guide rods (2), a first oil inlet (4) is formed in the bottom of the oil cylinder body (1), a second oil inlet (15) is formed in the top of the oil cylinder body (1), the guide rods (2) are arranged around the piston (3) and are connected with the oil cylinder body (1), a shifting fork (7) is connected with the lower ends of the guide rods (2) and the piston (3), a connecting rod (14) is connected with the upper end of the piston (3), the connecting rod (14) penetrates through the gearbox body (11), a plurality of assembling proximity switches (12), the contact (13) is installed at one end, close to the connecting rod (14), of the proximity switch (12), the piston (3) is located inside the cavity (9), a cavity end cover (8) is installed at the lower end opening of the cavity (9), and the first oil inlet (4) is connected with the cavity end cover (8) in a screw matching mode.

2. The hydraulic gear shifting device of the numerical control machine tool according to claim 1, characterized in that: the piston (3) can move up and down in the oil cylinder body (1) and penetrates through the cavity (9).

3. The hydraulic gear shifting device of the numerical control machine tool according to claim 1, characterized in that: the number of the guide rods (2) is two, and the two guide rods are symmetrically arranged on two sides of the piston (3).

4. The hydraulic gear shifting device of the numerical control machine tool as claimed in claim 3, characterized in that: each guide rod (2) is provided with one guide rod end cover (5), and the lower end of each guide rod (2) is fixedly arranged on the shifting fork (7) through the guide rod end cover (5).

5. The hydraulic gear shifting device of the numerical control machine tool as claimed in claim 3, characterized in that: each guide rod end cover (5) is connected with the shifting fork (7) through a guide rod screw (6).

6. The hydraulic gear shifting device of the numerical control machine tool according to claim 1, characterized in that: the proximity switches (12) are two in number and are arranged in parallel up and down.

7. The hydraulic gear shifting device of the numerical control machine tool according to claim 1, characterized in that: the diameter of the upper end of the connecting rod (14) is larger than that of the rest part of the connecting rod (14), and the upper end of the connecting rod (14) can be close to the contact (13) on the proximity switch (12).