CN216179274U

CN216179274U - Composite grinding machine head frame based on air sealing

Info

Publication number: CN216179274U
Application number: CN202122719801.1U
Authority: CN
Inventors: 班学荣; 徐伟光; 李钻锐; 杨静
Original assignee: Huizhou Deruike Machinery Co ltd
Current assignee: Huizhou Deruike Machinery Co ltd
Priority date: 2021-11-08
Filing date: 2021-11-08
Publication date: 2022-04-05
Anticipated expiration: 2031-11-08

Abstract

The utility model provides a composite grinding machine headstock based on air sealing, which comprises: base, end cover, main shaft, band pulley and power device. Wherein, seted up the holding tank on the base, the end cover lid fits the holding tank, and on the base was located in the main shaft rotation, the band pulley cup jointed in the main shaft and was in the holding tank, and power device drive band pulley is rotatory. Specifically, an avoiding groove is formed in the end cover, the belt wheel and the front end of the shaft penetrate through the avoiding groove of the end cover, a first airtight channel is formed in the wall of the avoiding groove, a second airtight channel is formed in the inner side of the belt wheel, a connecting through hole is formed in the belt wheel, and the first airtight channel is communicated with the second airtight channel through the connecting through hole; an air inlet channel is formed in the base, an air delivery channel matched with the air inlet channel is formed in the end cover, and the air inlet channel is communicated with the first airtight channel through the air delivery channel. The air-sealing-based composite grinding machine headstock can utilize high-pressure air to carry out air sealing on the headstock, so that the aim of preventing water and dust of the headstock is fulfilled.

Description

Composite grinding machine head frame based on air sealing

Technical Field

The utility model relates to the technical field of grinding machines, in particular to a composite grinding machine headstock based on air sealing.

Background

A grinding machine is a machine tool that grinds a surface of a workpiece using a grindstone, and most grinding machines grind the surface using a grindstone that rotates at high speed. The composite grinding machine is used for compounding processes on the basis of the traditional grinding machine, and can grind an inner hole and an outer cone or grind an inner hole and an end face simultaneously in one-time clamping of a workpiece, so that the traditional processing mode of sequential processing of a plurality of beds is completely changed. The method has the characteristics of high processing precision, high processing efficiency and high processing flexibility.

As shown in fig. 1, the headstock is mounted on a grinding machine, and is mainly used for clamping a workpiece during a grinding process. The grinding head frame is provided with a rotating part (such as a main shaft) and a fixed part (such as a base), a gap exists between the rotating part and the fixed part, and a sealing structure is generally required to prevent air containing dust from entering the interior of the grinding head frame. The traditional method adopts a rubber sealing ring to realize sealing, and the sealing mode has simple structure and low cost, but has high maintenance frequency and short service life; in addition, the sealing is incomplete, grinding fluid containing powder can still penetrate through gaps and adhere to the rubber sealing ring during grinding, and the powder can abrade and damage rotating parts during high-speed operation, so that gaps can be enlarged in the past, further, the sealing fails, precision parts such as a main shaft and a bearing are corroded by water vapor, and the precision of a grinding machine is affected.

Therefore, how to design a composite grinding machine head frame based on air sealing to completely seal the gap of the head frame and achieve the purpose of completely preventing dust and water vapor from invading the head frame is a technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art, and provides a composite grinding machine head frame based on air sealing, which can utilize an air curtain generated by dry high-pressure air to carry out air sealing on the head frame and realize the purpose of thoroughly preventing dust and water vapor from invading the head frame.

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

a gas seal based composite grinding head frame comprising: the device comprises a base, an end cover, a main shaft, a belt wheel and a power device;

the base is provided with an accommodating groove, the end cover covers the accommodating groove, the main shaft is rotatably arranged on the base and is provided with a shaft front end, the belt wheel is sleeved at the shaft front end of the main shaft and is positioned in the accommodating groove, and the power device drives the belt wheel to rotate;

an avoidance groove is formed in the end cover, the belt wheel and the front end of the shaft penetrate through the avoidance groove of the end cover, a first airtight channel is formed in the wall of the avoidance groove, a second airtight channel is formed in the inner side of the belt wheel, a connecting through hole is formed in the belt wheel, and the first airtight channel is communicated with the second airtight channel through the connecting through hole;

the base is provided with an air inlet channel, the end cover is provided with an air delivery channel matched with the air inlet channel, and the air inlet channel is communicated with the first airtight channel through the air delivery channel.

In one embodiment, an annular blocking sheet is arranged in the first air-tight passage.

In one embodiment, the number of the annular blocking sheets of the first air-tight passage is two, and the two annular blocking sheets divide the first air-tight passage into three chambers.

In one embodiment, the structure of the second airtight passage is the same as the structure of the first airtight passage.

In one embodiment, a first sealing ring is arranged on the belt wheel, and the first sealing ring is positioned in the first air tight channel; and a second sealing ring is arranged on the main shaft and is positioned in the second airtight channel.

In one embodiment, the end cap is fixedly mounted on the base by a screw.

In one embodiment, a rubber sealing ring is arranged between the air inlet channel and the air delivery channel.

In one embodiment, the power plant comprises: the device comprises a driving motor, a driving wheel and a conveying belt;

the driving motor is installed on the base, the driving wheel is in driving connection with the driving motor, the driving wheel is in driving connection with the belt wheel through the conveying belt, and the driving wheel and the conveying belt are located in the accommodating groove.

In one embodiment, the main shaft is provided with a connection locking wedge block, and the belt wheel is provided with a locking groove matched with the connection locking wedge block.

In one embodiment, the end cover is characterized in that reinforcing ribs are arranged on the end cover.

In summary, the air-tight-based composite grinding machine headstock can utilize the air curtain generated by the dry high-pressure air to carry out air-tight sealing on the headstock, and the aim of thoroughly preventing dust and water vapor from invading the headstock is fulfilled.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic view of a compound grinding machine according to the present invention;

FIG. 2 is a schematic diagram of the construction of a hermetic seal based composite grinder head frame of the present invention;

FIG. 3 is an exploded schematic view of the air seal based compound grinder head holder of FIG. 2;

FIG. 4 is a partial cross-sectional view of the hermetically based composite grinder head frame shown in FIG. 2;

FIG. 5 is an enlarged view taken at A of FIG. 4;

FIG. 6 is a partially exploded schematic view of the hermetic seal based composite grinder head frame of the present invention;

FIG. 7 is an enlarged view at B shown in FIG. 6;

fig. 8 is a partial cross-sectional view of a composite hermetic seal based burr head frame of the present invention.

Detailed Description

To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The utility model provides a composite grinding machine head frame 10 based on air sealing, and aims to seal the head frame by using an air curtain generated by dry high-pressure air to achieve the purposes of water prevention and dust prevention of the head frame.

As shown in fig. 2 and 3, the composite head frame 10 based on the hermetic seal includes: base 100, end cap 200, main shaft 300, pulley 400, and power device 500. The base 100 is provided with an accommodating groove 110, the end cover 200 covers the accommodating groove 110, the spindle 300 is rotatably disposed on the base 100, the spindle 300 has a front end 310, the pulley 400 is sleeved on the front end 310 of the spindle 300 and is located in the accommodating groove 110, and the power device 500 drives the pulley 400 to rotate.

Specifically, as shown in fig. 3, the end cover 200 is provided with an avoiding groove 210, the pulley 400 and the shaft front end 310 are inserted into the avoiding groove 210 of the end cover 200, a groove wall of the avoiding groove 210 is provided with a first airtight channel 220, an inner side of the pulley 400 is provided with a second airtight channel 410 (as shown in fig. 6), the pulley 400 is provided with a connecting through hole 401 (as shown in fig. 7), and the first airtight channel 220 and the second airtight channel 410 are communicated through the connecting through hole 401;

as shown in fig. 4 and 5, the base 100 is provided with an air inlet passage 120, the end cover 200 is provided with an air delivery passage 201 matching with the air inlet passage 101, and the air inlet passage 101 and the first airtight passage 220 are communicated through the air delivery passage 201.

Although the pulley 400 is inserted into the escape groove 210 of the end cap 200 and the pulley 400 is fitted to the spindle 300, since the end cap 200 is fixedly attached (belonging to a fixed member) and both the pulley 400 and the spindle 300 rotate (belonging to a rotating member), a gap exists between the end cap 200 and the pulley 400 and a gap also exists between the pulley 400 and the spindle 300. In operation, the air inlet passage 120 is connected to an external high pressure air source, and the high pressure air passes through the air inlet passage 120, the air delivery passage 201, the first airtight passage 220 and the second airtight passage 410, and is finally discharged through the gap. The discharged gas can form an air curtain, thereby blocking the invasion of dust and water vapor from the gap.

In order to realize complete air sealing, the utility model also makes detailed improvements on the structure of the composite grinding machine head frame 10 based on air sealing, and the specific structure is as follows:

referring to fig. 6, 7 and 8, in the present embodiment, an annular blocking plate 221 is disposed in the first airtight passage 220; preferably, the number of the annular barrier plates 202 of the first airtight passage 220 is two, and two annular barrier plates 202 divide the first airtight passage 220 into three chambers. In the present embodiment, the structure of the second airtight passage 410 is the same as that of the first airtight passage 220, and the second airtight passage 410 also has the annular barrier 202 and three chambers.

As shown in fig. 8, in order to better explain the specific structure of the first airtight passage 220 and the second airtight passage 410 in more detail, the three chambers of the first airtight passage 220 are referred to as: a first intake chamber 221, a first buffer chamber 222, a first exhaust chamber 223; the three chambers of the second airtight channel 410 are referred to in turn as: a second air inlet chamber 411, a second buffer chamber 412, and a second air outlet chamber 413. The gas transmission channel 201 is communicated with the first gas inlet chamber 221, and the first gas inlet chamber 221 is communicated with the second gas inlet chamber 411 through the connecting through hole 401. Thus, the externally injected high pressure gas preferentially enters the first and second

gas inlet chambers

221 and 411, and then sequentially passes through the other chambers and is discharged out of the first and second

airtight passages

220 and 410.

In this embodiment, a first sealing ring 420 is disposed on the pulley 400, and the first sealing ring 420 is located in the first airtight passage 220; the main shaft 300 is provided with a second sealing ring 320, and the second sealing ring 320 is located in the second airtight passage 320. The first sealing ring 420 is tightly pressed on the pulley 400, no gap exists between the first sealing ring and the pulley 400, and the first sealing ring 420 is located in the first exhaust chamber 223, so that a curved exhaust passage is formed in the first exhaust chamber 223, and thus gas backflow can be effectively prevented. Similarly, the second sealing ring 320 is tightly pressed against the main shaft 300 and received in the second exhaust chamber 413, so that a curved exhaust passage is also formed in the second exhaust chamber 413.

In the present embodiment, as shown in fig. 3, the power unit 500 includes: a drive motor 510, a drive wheel 520, and a conveyor belt 530. Wherein, driving motor 510 is installed on base 100, and action wheel 520 is connected with driving motor 510 drive, and action wheel 520 passes through conveyer belt 530 drive with band pulley 400 and is connected, and action wheel 520 is in holding tank 110 with conveyer belt 530.

It is additionally noted that to meet the processing requirements of a compound mill, the air seal based compound mill headstock 10 has two drive modes: first, the power device 500 drives the pulley 400 to rotate, and at this time, the main shaft 300 does not rotate; secondly, the pulley 400 is locked with the main shaft 300, and the power unit 500 drives the pulley 400 to rotate together with the main shaft 300. In one embodiment, the spindle 300 is provided with a connection locking wedge 330, the pulley 400 is provided with a locking groove 430 matched with the connection locking wedge 330, and when the connection locking wedge 330 enters the locking groove 430, the driving connection between the pulley 400 and the spindle 300 is realized.

The working principle of the air-tight-based composite headstock 10 of the present invention will be described with reference to the present embodiment, and please refer to fig. 3, fig. 6, fig. 7 and fig. 8 together:

in operation, the driving motor 510 drives the driving wheel 520 to rotate and drives the belt wheel 400 to rotate via the transmission belt 530. During the grinding process, the grinding machine sprays grinding fluid to the workpiece, and the grinding fluid containing powder and dust can be splashed to the end cover 200 of the headstock. Meanwhile, the air inlet passage 120 is communicated with an external high-pressure air source, and high-pressure air passes through the air inlet passage 120, the air delivery passage 201 and then enters the first airtight passage 220 of the end cover 200. At this time, as shown in fig. 8, the high pressure gas is in the first gas inlet chamber 221, and a part of the high pressure gas enters the second gas inlet chamber 411 of the second airtight passage 410 through the connection through-hole 401. The gas in the first air inlet chamber 221 will pass through the gap between the annular blocking plate 202 and the pulley 400 under the action of the gas pressure, and then enter the first buffer chamber 222; and then again through the gap into the first exhaust chamber 223 and through the tortuous exhaust passage formed by the first seal ring 420 and the first exhaust chamber 223, and finally out of the first airtight passage 220. Similarly, the high-pressure gas in the second gas inlet chamber 411 also passes through the second buffer chamber 412 and the second gas outlet chamber 413 in sequence, and passes through the curved gas outlet channel formed by the second sealing ring 320 and the second gas-tight channel 410, and is finally discharged out of the second gas-tight channel 410;

in this way, gas is discharged from the gap between the end cap 200 and the pulley 400 and the gap between the pulley 400 and the spindle 300, and the gas forms a gas curtain at the gap to block the grinding fluid containing the dust. Moreover, since the first sealing ring 420 and the first exhaust chamber 223 form a curved exhaust passage, and the second sealing ring 320 and the second airtight passage 410 form a curved exhaust passage, even when the grinding machine stops working and the new high-pressure gas is not injected into the intake passage 120, dust and water vapor are still difficult to enter the head frame through the curved exhaust passage, so that complete sealing can be realized no matter whether the composite grinding machine head frame 10 based on airtight sealing is in a working state or not.

It is emphasized that in the non-operating state, the dust and the water vapor are difficult to enter the inside of the head frame through the bent exhaust passage, so the composite grinding machine head frame 10 based on the air sealing can realize the sealing in the state; however, when the pulley 400 rotates at a high speed in an operating state, the grinding fluid containing the dust splashed thereon has a certain fluidity by a centrifugal force. At this time, if the high-pressure gas is not injected into the first and second

airtight passages

220 and 410, the dust and moisture may still intrude into the inside of the head frame, and therefore, it is necessary to achieve the airtight sealing by the dry high-pressure gas in the operation state.

In one embodiment, as shown in FIG. 5, the end cap 200 is fixedly mounted to the base 100 by a threaded rod 230. Preferably, a rubber sealing ring 120 is arranged between the air inlet channel 101 and the air delivery channel 201. In this way, it is possible to prevent the high-pressure gas injected from the gas inlet passage 101 from leaking out from the gap between the end cap 200 and the base 100, resulting in a drop in gas pressure.

In one embodiment, as shown in fig. 3, the end cap 200 is provided with a rib 240, so that the rigidity of the end cap 200 can be improved, and the end cap 200 is prevented from deforming during use.

In summary, the air-tight-based composite grinding machine head frame 10 of the present invention can utilize the air curtain generated by the dry high-pressure air to air-tightly seal the head frame, so as to achieve the purpose of water and dust prevention for the head frame.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A composite grinding head frame based on hermetic sealing, comprising: the device comprises a base, an end cover, a main shaft, a belt wheel and a power device;

2. The hermetically seal based compound grinder head frame according to claim 1, wherein an annular barrier is provided within the first hermetic channel.

3. The hermetically seal based compound grinder head frame according to claim 2, wherein the number of annular barrier plates of the first airtight channel is two, two of the annular barrier plates dividing the first airtight channel into three chambers.

4. The hermetically seal based composite headstock of claim 3 wherein the structure of the second hermetic channel is the same as the structure of the first hermetic channel.

5. The hermetic seal based composite grinder head frame according to claim 4, wherein a first sealing ring is provided on the pulley, the first sealing ring being in the first hermetic channel; and a second sealing ring is arranged on the main shaft and is positioned in the second airtight channel.

6. The hermetically seal based composite grinder head frame according to claim 1, wherein the end cap is fixedly mounted on the base by a screw.

7. The hermetic seal based composite grinder head frame according to claim 6, wherein a rubber sealing ring is provided between the air inlet channel and the air delivery channel.

8. The hermetically seal based compound grinder head frame according to claim 1, wherein the power means comprises: the device comprises a driving motor, a driving wheel and a conveying belt;

9. The hermetic seal based composite grinding head frame according to claim 1, wherein the main shaft is provided with a connection locking wedge, and the belt wheel is provided with a locking groove matched with the connection locking wedge.

10. The hermetically sealed based composite grinder head frame according to claim 1, wherein the end cap is provided with reinforcing ribs.