CN216524515U

CN216524515U - Pressure sensing mechanism for fourth shaft brake oil pressure

Info

Publication number: CN216524515U
Application number: CN202220053572.6U
Authority: CN
Inventors: 陈国荣
Original assignee: Zhejiang Guanxinhong Intelligent Technology Co ltd
Current assignee: Zhejiang Guanxinhong Intelligent Technology Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2022-05-13
Anticipated expiration: 2032-01-10

Abstract

The utility model provides a pressure sensing mechanism for fourth shaft brake oil pressure, and belongs to the technical field of machinery. It has solved the short technical problem such as of hydraulic brake sensor life of current fourth axle. The fourth shaft is including the shell that is equipped with the brake pressure chamber, set up the inspection hole with the brake pressure chamber intercommunication on the shell, this pressure sensing mechanism of brake oil pressure includes pressure measurement pole and response piece, the outside that lies in the inspection hole on the shell is fixed with the mount pad, the pressure measurement pole is worn to establish on the mount pad and is kept sealed between pressure measurement pole and the mount pad, the relative mount pad of pressure measurement pole outwards stretches out when the increase of brake pressure chamber pressure, be equipped with between mount pad and the pressure measurement pole and enable the inside spring that retracts and reset of pressure measurement pole after the decline of brake pressure chamber pressure, the response piece is fixed in the shell outside and the response piece can detect the pressure measurement pole and be located withdrawal position or the extended position. The utility model has the advantages of long service life and low cost.

Description

Pressure sensing mechanism for fourth shaft brake oil pressure

Technical Field

The utility model belongs to the technical field of machinery, relates to a fourth shaft, and particularly relates to a pressure sensing mechanism for brake oil pressure of the fourth shaft.

Background

The fourth shaft is used for a numerical control machine tool, the fourth shaft can clamp a workpiece and realize the rotation fixation of the workpiece, the numerical control machine tool needs the workpiece fixation on the fourth shaft when in processing, and therefore, a brake system is arranged on the fourth shaft, for example, a disc tailstock (patent No. 2020214353599) disclosed by Chinese patent documents, and the piston is pushed by hydraulic pressure to enable the piston and the shell to tightly hold a brake pad to realize braking. In order to send the fourth shaft to a numerical control machine tool in a braking state, the fourth shaft is mainly realized by detecting hydraulic pressure, at present, a hydraulic brake sensor is generally adopted to realize the braking state, the hydraulic brake sensor determines whether the fourth shaft is in the braking state by directly detecting the pressure in a brake pressure cavity, the hydraulic brake sensor enters a detection hole of the hydraulic brake sensor through hydraulic oil to detect the pressure, a garbage deposition phenomenon can occur after a hydraulic system is in closed operation for a long time, the detection hole of the hydraulic brake sensor is blocked, the hydraulic brake sensor fails to work, the internal pressure cannot be accurately detected, and the braking state of the fourth shaft cannot be accurately judged; the hydraulic brake sensor is a high-precision sensor, needs to be replaced after being damaged, and is high in use and maintenance cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a fourth shaft pressure sensing mechanism for brake oil pressure, which aims to solve the technical problem of providing a pressure sensing mechanism for brake oil pressure with long service life and low cost.

The purpose of the utility model can be realized by the following technical scheme:

a pressure sensing mechanism for the fourth shaft of brake oil pressure comprises a shell with a brake pressure cavity, a detection hole communicated with the brake pressure cavity is arranged on the shell, it is characterized in that the pressure sensing mechanism of the brake oil pressure comprises a pressure detection rod and a sensing piece, a mounting seat is fixed on the outer side of the detection hole on the shell, the pressure detection rod is arranged on the mounting seat in a penetrating way, the sealing is kept between the pressure detection rod and the mounting seat, the inner end of the pressure detection rod is positioned in the detection hole, when the pressure in the brake pressure cavity is increased, the pressure detection rod extends outwards relative to the mounting seat, a spring which can enable the pressure detection rod to retract and reset inwards after the pressure in the brake pressure cavity is reduced is arranged between the mounting seat and the pressure detection rod, the sensing piece is fixed outside the shell and can detect whether the pressure detection rod is located at the retracted position or the extended position.

By arranging the pressure detection rod, the pressure detection rod is stressed to move outwards and extend when the oil pressure in the brake pressure cavity is increased to overcome the elasticity of the spring, the oil pressure in the brake pressure cavity can realize the fourth shaft brake action, and the sensing piece can sense that the pressure detection rod is positioned at the extending position, so that a signal can be sent to a machine tool controller, and the fourth shaft is determined to be in a brake state; when the workpiece needs to be rotated after machining is finished, the brake pressure cavity is decompressed, the pressure detection rod can be retracted inwards to reset by the spring after the oil pressure is reduced, the sensing piece can sense that the pressure detection rod is located at the retracted position at the moment, and a signal is sent to a machine tool controller, so that the fourth shaft is determined to be in a non-brake state; when the hydraulic brake is used, only two states of whether the oil pressure in the brake pressure cavity is higher than a pressure value meeting the brake or lower than the pressure value meeting the brake are required to be acquired, so that the functions can be realized by displaying the change of the oil pressure in the brake pressure cavity in a mechanical transmission mode of a pressure detection rod, the influence of garbage deposition is avoided, the transmission is stable, the change condition of the oil pressure can be accurately reflected, and the service life is long; the induction part positioned outside the shell can be conveniently maintained and replaced, and the maintenance cost is reduced.

In the forced induction mechanism of foretell fourth shaft brake oil pressure, the response piece is two proximity switch, two proximity switch is located one side of pressure measurement pole, two proximity switch arranges along the axis direction of pressure measurement pole, the pressure measurement pole is located one section in the mount pad outside and is fixed with the inductive head pressure measurement pole is in when stretching out the position the inductive head is close to the proximity switch who leans on outward when the pressure measurement pole is in the withdrawal position the inductive head is close to the proximity switch who leans on the interior. When the pressure detection rod is in the retraction position, the induction head is positioned right in front of the inner proximity switch, and the inner proximity switch sends a signal to the machine tool controller; when the pressure detection rod is in the extending position, the induction head is positioned right in front of the outer proximity switch, and the outer proximity switch sends a signal to the machine tool controller; the positions of the pressure detection rod during extension and retraction can be detected through the two proximity switches, and whether the fourth shaft is in a braking state or not can be judged.

In the pressure sensing mechanism of foretell fourth shaft brake oil pressure, the response piece is position switch, position switch fixes on the shell and is located the just right position of the outer end of pressure detection pole when the pressure detection pole is in the extended position the contact of position switch can be touched to the outer end of pressure detection pole when the pressure detection pole is in the withdrawal position switch's contact is kept away from to the outer end of pressure detection pole. When the pressure detection rod is at the retraction position, the position switch is not triggered, and at the moment, the position switch does not send a signal to the machine tool controller, and the fourth shaft is judged to be in a non-braking state; when the pressure detection rod is located at the extending position, the position switch is triggered, and at the moment, the position switch sends a signal to the machine tool controller to judge that the fourth shaft is located in a braking state.

In the forced induction mechanism of foretell fourth shaft brake oil pressure, the mount pad pastes fixed ring portion including the uide bushing portion that stretches into the inspection hole and with the shell, be equipped with sealing washer one between uide bushing portion and the inspection hole inner wall, the uide bushing portion is close to the inboard of inner and has seted up the positioning ring groove, be equipped with sealing washer two in the positioning ring groove, the pressure measurement pole passes sealing washer two, the inside and outside both sides of sealing washer two are sealed with pressure measurement pole and uide bushing portion respectively. The guide sleeve portion is arranged to guarantee that the pressure detection rod moves stably and smoothly, the sealing connection of the pressure detection rod relative to the guide sleeve portion is achieved through the second sealing ring, the second sealing ring is fixed through the positioning ring groove, and sealing when the pressure detection rod moves is guaranteed.

In the pressure sensing mechanism of foretell fourth shaft brake oil pressure, the inner of pressure measurement pole is equipped with to support to lean on the portion, the spring housing is on the pressure measurement pole, the one end of spring is supported and is supported on supporting the portion, the other end of spring supports on the mount pad.

Compared with the prior art, this forced induction mechanism of fourth shaft brake oil pressure has and realizes long-life and low-cost advantage under the condition that guarantees to detect the intracavity oil pressure change of brake pressure.

Drawings

Fig. 1 is a schematic perspective view of the fourth shaft.

FIG. 2 is an enlarged schematic view of the pressure sensing rod in the retracted position according to the first embodiment.

FIG. 3 is an enlarged schematic view of the pressure sensing rod in an extended position according to one embodiment.

Fig. 4 is a schematic perspective view of the pressure detection rod and the mounting seat.

Fig. 5 is an enlarged partial sectional view of the brake pressure sensing mechanism when mounted on the housing.

In the figure, 1, a housing; 11. a detection hole; 2. a sensing member; 21. a proximity switch; 3. a mounting seat; 31. a guide sleeve portion; 311. a first sealing ring; 312. a positioning ring groove; 313. a second sealing ring; 32. a fixed ring portion; 4. a pressure detection lever; 41. an abutting portion; 42. an inductive head; 5. a spring.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 to 5, the fourth shaft includes a housing 1 provided with a brake pressure chamber, the brake pressure chamber is located between a piston and the housing 1, a brake pad is arranged outside the piston, the brake pad is located between the piston and the housing 1, when the pressure in the brake pressure chamber increases, the piston moves outwards to compress the brake pad on the housing 1 to realize braking, and a detection hole 11 communicated with the brake pressure chamber is formed in the housing 1.

This pressure sensing mechanism of brake oil pressure includes pressure measurement pole 4 and response piece 2, the outside that lies in inspection hole 11 on shell 1 is fixed with mount pad 3, pressure measurement pole 4 wears to establish on mount pad 3, mount pad 3 leans on fixed ring portion 32 including the uide bushing portion 31 that stretches into inspection hole 11 and pasting with shell 1, be equipped with sealing washer 311 between uide bushing portion 31 and the inspection hole 11 inner wall, uide bushing portion 31 is close to the inboard of inner and has seted up positioning ring groove 312, be equipped with two 313 of sealing washer in the positioning ring groove 312, pressure measurement pole 4 passes two 313 of sealing washer, the inside and outside both sides of two 313 of sealing washer are sealed with pressure measurement pole 4 and uide bushing portion 31 respectively, two 313 of sealing washer are the skeleton oil blanket in this embodiment, can satisfy the sealed requirement when pressure measurement pole 4 removes.

The inner of pressure measurement pole 4 is located inspection hole 11, pressure measurement pole 4 outwards stretches out relative mount pad 3 when brake pressure intracavity oil pressure increases, be equipped with between mount pad 3 and the pressure measurement pole 4 and enable the inside spring 5 that retracts and reset of pressure measurement pole 4 after the decline of brake pressure intracavity oil pressure, the inner of pressure measurement pole 4 is equipped with to support and leans on portion 41, spring 5 overlaps on pressure measurement pole 4, the one end of spring 5 is supported and is being supported and support on portion 41, the other end of spring 5 supports on mount pad 3, spring 5 is in the lax state when pressure measurement pole 4 is in the withdrawal position. In actual use, the selection of the spring 5 is determined according to the pressure value required by braking, and only the requirement that the compression amount of the spring 5 can enable the sensing part 2 to detect that the pressure detection rod 4 is located at the extending position when the braking pressure value is reached is met, and the compression amount of the spring 5 cannot enable the pressure detection rod 4 to be located at the extending position when the pressure value is lower than the braking pressure value is met.

The sensing part 2 is fixed in the shell 1 outside, specifically speaking, the sensing part 2 is two proximity switches 21, two proximity switches 21 are located one side of pressure detection pole 4, two proximity switches 21 are arranged along the axis direction of pressure detection pole 4, pressure detection pole 4 is located one section of mount pad 3 outside and is fixed with inductive head 42, inductive head 42 is close to outer proximity switch 21 when pressure detection pole 4 is in the extended position, inductive head 42 is close to inner proximity switch 21 when pressure detection pole 4 is in the retracted position. When the pressure detection rod 4 is in the retracted position, the sensing head 42 is positioned right in front of the inner proximity switch 21, and the inner proximity switch 21 sends a signal to the machine tool controller; when the pressure detection rod 4 is in the extending position, the sensing head 42 is positioned right in front of the outer proximity switch 21, and at the moment, the outer proximity switch 21 sends a signal to the machine tool controller; the positions of the pressure detection rod 4 when the pressure detection rod extends out and retracts can be respectively detected through the two proximity switches 21, and whether the fourth shaft is in a braking state or not can also be judged.

By arranging the pressure detection rod 4, when the oil pressure in the brake pressure cavity is increased to overcome the elasticity of the spring 5, the pressure detection rod 4 is stressed to move outwards and extend, the oil pressure in the brake pressure cavity can realize the fourth shaft brake action, and the sensing piece 2 can sense that the pressure detection rod 4 is in the extending position, so that a signal can be sent to a machine tool controller, and the fourth shaft is determined to be in a brake state; when the workpiece needs to be rotated after machining is finished, the brake pressure cavity is decompressed, the pressure detection rod 4 can be retracted inwards to reset by the spring 5 after the oil pressure is reduced, the sensing piece 2 can sense that the pressure detection rod 4 is located at the retracted position at the moment, and a signal is sent to a machine tool controller, so that the fourth shaft is determined to be in a non-brake state; when the automatic hydraulic brake is used, only two states of whether the oil pressure in the brake pressure cavity is higher than a pressure value meeting the brake or lower than the pressure value meeting the brake are required to be acquired, so that the functions can be realized by displaying the change of the oil pressure in the brake pressure cavity in a mechanical transmission mode of the pressure detection rod 4, the automatic hydraulic brake is not influenced by garbage deposition, the transmission is stable, the change condition of the oil pressure can be accurately reflected, and the service life is long; the induction part 2 positioned outside the shell 1 can be conveniently maintained and replaced, and the maintenance cost is reduced.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, and different points are as follows: the sensing piece is a position switch, the position switch is fixed on the shell and is located at the position right opposite to the outer end of the pressure detection rod, the outer end of the pressure detection rod can touch the contact of the position switch when the pressure detection rod is located at the extending position, and the outer end of the pressure detection rod is far away from the contact of the position switch when the pressure detection rod is located at the retracting position. When the pressure detection rod is at the retraction position, the position switch is not triggered, and at the moment, the position switch does not send a signal to the machine tool controller, and the fourth shaft is judged to be in a non-braking state; when the pressure detection rod is located at the extending position, the position switch is triggered, and at the moment, the position switch sends a signal to the machine tool controller to judge that the fourth shaft is located in a braking state.

The specific embodiments described herein are merely illustrative of the spirit of the utility model. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the utility model as defined in the appended claims.

Claims

1. The utility model provides a forced induction mechanism of fourth axle brake oil pressure, the fourth axle is including shell (1) that is equipped with the brake pressure chamber, offer on shell (1) with detection hole (11) of brake pressure chamber intercommunication, its characterized in that, this forced induction mechanism of brake oil pressure includes pressure detection pole (4) and response piece (2), the outside that lies in detection hole (11) on shell (1) is fixed with mount pad (3), pressure detection pole (4) wear to establish on mount pad (3) and keep sealed between pressure detection pole (4) and mount pad (3), the inner of pressure detection pole (4) is located detection hole (11) when brake pressure chamber increases pressure detection pole (4) outwards stretches out mount pad (3) relatively, be equipped with between mount pad (3) and pressure detection pole (4) and make pressure detection pole (4) inwards retract reset internal pressure spring (5) after the decline of brake pressure chamber internal pressure The sensing piece (2) is fixed on the outer side of the shell (1), and the sensing piece (2) can detect whether the pressure detection rod (4) is located at a retraction position or an extension position.

2. The pressure sensing mechanism of a fourth shaft brake oil pressure according to claim 1, characterized in that the sensing member (2) is two proximity switches (21), two proximity switches (21) are located on one side of the pressure detection rod (4), two proximity switches (21) are arranged along the axial direction of the pressure detection rod (4), a sensing head (42) is fixed on a section of the pressure detection rod (4) located on the outer side of the mounting seat (3), the sensing head (42) is close to the outer proximity switch (21) when the pressure detection rod (4) is in the extended position, and the sensing head (42) is close to the inner proximity switch (21) when the pressure detection rod (4) is in the retracted position.

3. The fourth shaft brake oil pressure sensing mechanism of claim 1, characterized in that the sensing member (2) is a position switch fixed on the housing (1) and located at a position opposite to the outer end of the pressure detection rod (4), the outer end of the pressure detection rod (4) touches the contact of the position switch when the pressure detection rod (4) is in the extended position, and the outer end of the pressure detection rod (4) is far away from the contact of the position switch when the pressure detection rod (4) is in the retracted position.

4. The fourth shaft brake oil pressure sensing mechanism according to claim 1, 2 or 3, wherein the mounting seat (3) includes a guide sleeve portion (31) extending into the detection hole (11) and a fixed ring portion (32) attached to the outer shell (1), a first seal ring (311) is disposed between the guide sleeve portion (31) and the inner wall of the detection hole (11), a positioning ring groove (312) is disposed on the inner side of the guide sleeve portion (31) near the inner end, a second seal ring (313) is disposed in the positioning ring groove (312), the pressure detection rod (4) penetrates the second seal ring (313), and the inner side and the outer side of the second seal ring (313) are respectively sealed with the pressure detection rod (4) and the guide sleeve portion (31).

5. The pressure sensing mechanism for the fourth shaft brake oil pressure as claimed in claim 1, 2 or 3, wherein the inner end of the pressure detecting rod (4) is provided with an abutting portion (41), the spring (5) is sleeved on the pressure detecting rod (4), one end of the spring (5) abuts against the abutting portion (41), and the other end of the spring (5) abuts against the mounting seat (3).