CN210623425U - Rotating shaft braking device with safety function - Google Patents
Rotating shaft braking device with safety function Download PDFInfo
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- CN210623425U CN210623425U CN201920910122.2U CN201920910122U CN210623425U CN 210623425 U CN210623425 U CN 210623425U CN 201920910122 U CN201920910122 U CN 201920910122U CN 210623425 U CN210623425 U CN 210623425U
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- brake pad
- rotating shaft
- oil
- piston
- bearing seat
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Abstract
The utility model discloses a take safe function's rotation axis arresting gear, including sleeve and annular oil cylinder subassembly, outer brake block and interior brake block, oil cylinder subassembly and outer brake block are fixed respectively on the bearing frame, and interior brake block is fixed on the rotation axis, and interior brake block is located the place ahead of outer brake block, and the oil cylinder subassembly includes the cylinder body, piston and oil cylinder lid, and the piston is located the rear of outer brake block, is provided with a plurality of rectangle springs of evenly arranging and being in compression state between oil cylinder lid and the piston, the preceding terminal surface of a plurality of rectangle springs respectively with the trailing flank contact of piston. The rotating shaft braking device with the safety function is low in cost and good in braking effect. Although the braking device only adopts a pair of brake pads, two friction surfaces are generated during braking, because the magnitude of the friction force is in direct proportion to the contact area, double braking torque can be realized, the braking effect is good, and the reliable braking of a rotating shaft can be realized even under the condition of power failure, so that the safety of the whole machine tool is ensured.
Description
Technical Field
The utility model relates to a be applied to the arresting gear of lathe, specifically be a take safety function's rotation axis arresting gear.
Background
No matter the vertical machining center, the horizontal machining center or the five-axis linkage machining center is provided with one or more rotating shafts to realize machining and positioning functions, and the braking device is an essential part for realizing the functions, and the braking device is the same as a brake which is required to stop a running automobile.
The common braking device for the rotating shaft on the machining center is in the forms of pneumatic clamping, hydraulic braking and the like. Pneumatic clamps are expensive and hydraulic brakes are often the choice in practical design and use. However, the conventional hydraulic brake device has the problems of power failure and leakage, and is easy to damage a main shaft and a workpiece, so that huge economic loss is brought. In addition, in order to increase the braking torque, the whole hydraulic braking device is often bulky, which is not favorable for lean design requirements.
Disclosure of Invention
The utility model aims to solve the technical problem that, to prior art not enough, provide a take safety function's rotation axis arresting gear, this arresting gear is with low costs, can realize double braking torque, even under the outage condition, also can realize the reliable braking to the rotation axis, ensures the security of whole lathe.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a rotary shaft braking device with a safety function comprises a sleeve, an annular oil cylinder assembly, an outer brake pad and an inner brake pad, wherein the sleeve is fixed at the rear end of a bearing seat, a rotary shaft is rotatably installed on the bearing seat, the sleeve, the bearing seat and the rotary shaft are enclosed to form an annular cavity, the oil cylinder assembly, the outer brake pad and the inner brake pad are all arranged in the annular cavity, the oil cylinder assembly and the outer brake pad are respectively fixed on the bearing seat, the inner brake pad is fixed on the rotary shaft, the inner brake pad is positioned in front of the outer brake pad, the oil cylinder assembly comprises a cylinder body, a piston and an oil cylinder cover, the oil cylinder cover is fixed at the rear side of the cylinder body, the oil cylinder cover and the piston are enclosed to form a clamping oil cavity, and the piston is positioned behind the outer brake pad, the cylinder body and the piston are enclosed to form a loosening oil cavity, a first oil port and a second oil port which are connected with a hydraulic station are formed in the side wall of the cylinder body, the first oil port is communicated with the clamping oil cavity, the second oil port is communicated with the loosening oil cavity, a plurality of rectangular springs which are uniformly arranged and in a compressed state are arranged between the cylinder cover and the piston, and the front end faces of the rectangular springs are respectively contacted with the rear side face of the piston; when the rotating shaft rotates freely, axial gaps are respectively reserved between the outer brake pad and the piston and between the inner brake pad and the bearing seat, hydraulic oil is filled in the loosening oil cavity, and the pressure in the loosening oil cavity is equal to the spring force of the rectangular springs; during braking, under the extrusion of the piston, the front side surface of the outer brake pad is in surface contact with the rear side surface of the inner brake pad, and the front side surface of the inner brake pad is in contact with the bearing seat.
The utility model discloses arresting gear's theory of operation does: the clamping oil cavity and the loosening oil cavity are both provided with pressure by the hydraulic station, and the hydraulic station provides certain pressure to the loosening oil cavity to balance the spring force of the rectangular springs in the free rotation state of the rotating shaft. When the oil is fed into the clamping oil cavity, the oil pressure and the rectangular springs jointly push the piston to move forwards to extrude the outer brake pad, so that the front side surface of the outer brake pad is attached to the rear side surface of the inner brake pad, and meanwhile, the front side surface of the inner brake pad is attached to the bearing seat, so that the braking effect is achieved. When the oil is fed when the oil cavity is loosened, the piston moves leftwards by overcoming the elasticity of the rectangular springs, the rectangular springs are further compressed until the stroke end, the outer brake pad is elastically deformed and reset at the moment, the outer brake pad is separated from the inner brake pad, and the rotating shaft restores to rotate freely.
When the hydraulic station is powered off suddenly, the oil cavity is clamped and loosened, pressure is lost simultaneously, at the moment, due to the elastic reset of the rectangular springs, the piston can still drive the outer brake pad to be attached to the inner brake pad under the elastic action of the rectangular springs, and therefore the safety function of the braking device is achieved, and the safety of the whole machine tool is guaranteed.
During braking, the front side surface of the outer brake pad is in surface contact with the rear side surface of the inner brake pad, and the front side surface of the inner brake pad is in contact with the bearing seat.
Preferably, the axial outer side of the outer brake pad is fixed on the bearing seat, the axial inner side of the inner brake pad is fixed on the rotating shaft, the axial inner side of the outer brake pad is over against the axial outer side of the inner brake pad, and the axial outer side of the inner brake pad is over against the bearing seat.
Preferably, an adjusting pad is fixed on the rotating shaft, a first gland is arranged behind the adjusting pad, the inner brake pad is arranged between the first gland and the adjusting pad in a pressing mode, and a plurality of first screws respectively penetrate through the first gland, the inner brake pad and the adjusting pad to fix the first gland, the inner brake pad and the adjusting pad on the rotating shaft. The axial clearance between the inner brake block and the bearing seat as well as between the outer brake block and the bearing seat can be adjusted by changing the thickness of the adjusting pad.
Preferably, the front side of the oil cylinder cover is provided with a plurality of grooves, and each groove is internally provided with one rectangular spring. The groove has a limiting effect on the rectangular spring, so that the mounting reliability of the rectangular spring can be improved, and the braking effect is ensured.
Preferably, the cylinder body with the bearing frame between be provided with a plurality of first O type sealing washer, the cylinder cap with the bearing frame between be provided with a plurality of second O type sealing washers, the cylinder cap with the cylinder body between be provided with a plurality of third O type sealing washers, the piston with the cylinder body between be provided with two-way piston seal and one-way piston seal respectively, the piston with the cylinder cap between be provided with pull rod seal, the front side of pressing from both sides tight oil pocket by two-way piston seal with pull rod seal, the rear side of pressing from both sides tight oil pocket by third O type sealing washer seal, the front side of loosening the oil pocket by one-way piston seal, the rear side of loosening the oil pocket by two-way piston seal. A plurality of first O type sealing washers and a plurality of second O type sealing washer play the oil blanket effect, cooperate a plurality of third O type sealing washers, two-way piston to seal, one-way piston to seal and pull rod to seal, can effectively guarantee the sealed effect to the oil cylinder subassembly, avoid the emergence of oil leak phenomenon.
Preferably, the side wall of the bearing seat is provided with an oil drainage hole which is communicated with the annular cavity and used for guiding out redundant oil.
Furthermore, a plurality of axial through holes are formed in the outer brake pad and are respectively communicated with the oil drainage hole. The plurality of axial through holes can enable redundant oil to be discharged through the oil drainage hole in time.
Preferably, a first rotary sealing element is arranged between the rotating shaft and the cylinder assembly, an outer ring surface and an inner ring surface of the first rotary sealing element are respectively in contact with the cylinder head and the rotating shaft surface, the first rotary sealing element is axially limited at the rear end of the cylinder head by a second gland, and the second gland is fixed on the cylinder head. The first rotary sealing element is used for preventing oil leaked from the oil cylinder assembly under an accidental condition from flowing out, and the sealing effect on the oil cylinder assembly is further ensured.
Preferably, a second rotary sealing member is disposed between the rotary shaft and the bearing seat, an outer annular surface and an inner annular surface of the second rotary sealing member are in contact with the bearing seat and the rotary shaft surface, respectively, the second rotary sealing member is axially limited at the front ends of the rotary shaft and the bearing seat by a dust cap, and the dust cap is fixed on the rotary shaft. The second rotary sealing element is used for preventing water, gas and scrap iron at the front end of the rotating shaft from entering the rotating shaft and the bearing seat.
Preferably, the rotating shaft is rotatably mounted on the bearing seat through a YRT bearing, the rotating shaft is connected with an inner ring of the YRT bearing through a second screw, and the bearing seat is connected with an outer ring of the YRT bearing through a third screw.
Compared with the prior art, the utility model has the advantages of as follows: the utility model discloses a take safety function's rotation axis arresting gear, it is with low costs, braking effect is good. Although the braking device only adopts a pair of brake pads, two friction surfaces are generated during braking, because the magnitude of the friction force is in direct proportion to the contact area, double braking torque can be realized, the braking effect is good, and the reliable braking of a rotating shaft can be realized even under the condition of power failure, so that the safety of the whole machine tool is ensured.
Drawings
FIG. 1 is a schematic view of the effect of the brake device according to the present invention after installation;
fig. 2 is an enlarged view of a portion a in fig. 1.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
The rotary shaft brake device with safety function of embodiment 1, as shown in fig. 1 and fig. 2, comprises a sleeve 1, an annular cylinder assembly, an outer brake pad 2 and an inner brake pad 3, the sleeve 1 is fixed at the rear end of a bearing seat 4 by screws, the rotary shaft 5 is rotatably mounted on the bearing seat 4, the sleeve 1, the bearing seat 4 and the rotary shaft 5 enclose an annular cavity 10, the cylinder assembly, the outer brake pad 2 and the inner brake pad 3 are all arranged in the annular cavity 10, the cylinder assembly and the outer brake pad 2 are respectively fixed on the bearing seat 4 by screws, the inner brake pad 3 is fixed on the rotary shaft 5, the inner brake pad 3 is located in front of the outer brake pad 2, the cylinder assembly comprises a cylinder body 61, a piston 62 and a cylinder cover 63, the cylinder cover 63 is fixed at the rear side of the cylinder body 61 by screws, the cylinder body 61, the cylinder cover 63 and the piston chamber 62 enclose a clamping chamber 64, the piston 62 is located at the rear of the outer, a loosening oil cavity 65 is defined by the cylinder body 61 and the piston 62, a first oil port 66 and a second oil port 67 which are connected with a hydraulic station (not shown in the figure) are formed in the side wall of the cylinder body 61, the first oil port 66 is communicated with the clamping oil cavity 64, the second oil port 67 is communicated with the loosening oil cavity 65, a plurality of rectangular springs 7 which are uniformly arranged and in a compressed state are arranged between the cylinder cover 63 and the piston 62, and the front end faces of the rectangular springs 7 are respectively contacted with the rear side face of the piston 62; when the rotating shaft 5 rotates freely, axial gaps are respectively reserved between the outer brake pad 2 and the piston 62 and between the inner brake pad 3 and the bearing seat 4, hydraulic oil is filled in the loosening oil cavity 65, and the pressure in the loosening oil cavity 65 is equal to the spring force of the rectangular springs 7; during braking, under the extrusion of the piston 62, the front side surface of the outer brake pad 2 is in surface contact with the rear side surface of the inner brake pad 3, and the front side surface of the inner brake pad 3 is in contact with the bearing seat 4.
In embodiment 1, the axially outer side of the outer brake pad 2 is fixed to the bearing seat 4, the axially inner side of the inner brake pad 3 is fixed to the rotating shaft 5, the axially inner side of the outer brake pad 2 faces the axially outer side of the inner brake pad 3, and the axially outer side of the inner brake pad 3 faces the bearing seat 4.
In embodiment 1, three first O-ring seals 71 are disposed between the cylinder block 61 and the bearing block 4, one second O-ring seal 72 is disposed between the cylinder head 63 and the bearing block 4, one third O-ring seal 73 is disposed between the cylinder head 63 and the cylinder block 61, a bidirectional piston seal 74 and a unidirectional piston seal 75 are disposed between the piston 62 and the cylinder block 61, a pull rod seal 76 is disposed between the piston 62 and the cylinder head 63, the front side of the clamping oil chamber 64 is sealed by the bidirectional piston seal 74 and the pull rod seal 76, the rear side of the clamping oil chamber 64 is sealed by the third O-ring seal 73, the front side of the unclamping oil chamber 65 is sealed by the unidirectional piston seal 75, and the rear side of the unclamping oil chamber 65 is sealed by the bidirectional piston seal 74.
In embodiment 1, a first rotary seal 51 is disposed between the rotating shaft 5 and the cylinder assembly, the outer annular surface and the inner annular surface of the first rotary seal 51 are in surface contact with the cylinder head 63 and the rotating shaft 5, respectively, the first rotary seal 51 is axially limited at the rear end of the cylinder head 63 by a second gland 52, and the second gland 52 is fixed on the cylinder head 63; a second rotary sealing member 53 is arranged between the rotating shaft 5 and the bearing seat 4, the outer annular surface and the inner annular surface of the second rotary sealing member 53 are respectively in surface contact with the bearing seat 4 and the rotating shaft 5, the second rotary sealing member 53 is axially limited at the front ends of the rotating shaft 5 and the bearing seat 4 by a dust cover 54, and the dust cover 54 is fixed on the rotating shaft 5.
In embodiment 1, the rotary shaft 5 is rotatably mounted on the bearing housing 4 by a YRT bearing, the rotary shaft 5 is connected to the inner ring 55 of the YRT bearing by a second screw 57, and the bearing housing 4 is connected to the outer ring 56 of the YRT bearing by a third screw 58.
The rotating shaft brake device with the safety function of the embodiment 2 is different from the embodiment 1 in that in the embodiment 2, an adjusting pad 81 is fixed on a rotating shaft 5, a first pressing cover 82 is arranged behind the adjusting pad 81, an inner brake pad 3 is tightly pressed between the first pressing cover 82 and the adjusting pad 81, and a plurality of first screws 83 respectively penetrate through the first pressing cover 82, the inner brake pad 3 and the adjusting pad 81 to fix the three parts on the rotating shaft 5; a plurality of grooves 60 are formed in the front side of the oil cylinder cover 63, and a rectangular spring 7 is installed in each groove 60; an oil drainage hole 41 which is communicated with the annular cavity 10 and used for guiding out redundant oil is formed in the side wall of the bearing seat 4, a plurality of axial through holes 21 are formed in the outer brake pad 2, and the axial through holes 21 are respectively communicated with the oil drainage hole 41.
When the rotary shaft braking device with the safety function works, the clamping oil cavity 64 and the releasing oil cavity 65 are both provided with pressure by the hydraulic station, and the hydraulic station provides certain pressure to the releasing oil cavity 65 to balance the spring force of the rectangular springs 7 in the free rotation state of the rotary shaft 5. When the oil is fed into the clamping oil cavity 64, the oil pressure and the rectangular springs 7 jointly push the piston 62 to move forwards to extrude the outer brake pad 2, so that the front side surface of the outer brake pad 2 is attached to the rear side surface of the inner brake pad 3, and meanwhile, the front side surface of the inner brake pad 3 is attached to the bearing seat 4, so that the braking effect is achieved. When the oil release oil chamber 65 is filled with oil, the piston 62 overcomes the elastic force of the rectangular springs 7 to move leftwards, the rectangular springs 7 are further compressed until the stroke end, at the moment, the elastic deformation of the outer brake pad 2 is reset, the outer brake pad is separated from the inner brake pad 3, and the rotating shaft 5 is restored to rotate freely. When the hydraulic station is suddenly powered off, the pressure in the clamping oil cavity 64 and the pressure in the loosening oil cavity 65 are simultaneously lost, at the moment, due to the elastic reset of the rectangular springs 7, the piston 62 can still drive the outer brake pad 2 to be attached to the inner brake pad 3 under the elastic action of the rectangular springs 7, so that the safety function of the braking device is realized, and the safety of the whole machine tool is ensured.
Claims (10)
1. A rotary shaft braking device with a safety function is characterized by comprising a sleeve, an annular oil cylinder assembly, an outer brake pad and an inner brake pad, wherein the sleeve is fixed at the rear end of a bearing seat, the rotary shaft is rotatably arranged on the bearing seat, the sleeve, the bearing seat and the rotary shaft enclose an annular cavity, the oil cylinder assembly, the outer brake pad and the inner brake pad are all arranged in the annular cavity, the oil cylinder assembly and the outer brake pad are respectively fixed on the bearing seat, the inner brake pad is fixed on the rotary shaft, the inner brake pad is positioned in front of the outer brake pad, the oil cylinder assembly comprises a cylinder body, a piston and an oil cylinder cover, the oil cylinder cover is fixed at the rear side of the cylinder body, the oil cavity, the oil cylinder cover and the piston enclose a clamping manner, and the piston is positioned behind the outer brake pad, the cylinder body and the piston are enclosed to form a loosening oil cavity, a first oil port and a second oil port which are connected with a hydraulic station are formed in the side wall of the cylinder body, the first oil port is communicated with the clamping oil cavity, the second oil port is communicated with the loosening oil cavity, a plurality of rectangular springs which are uniformly arranged and in a compressed state are arranged between the cylinder cover and the piston, and the front end faces of the rectangular springs are respectively contacted with the rear side face of the piston; when the rotating shaft rotates freely, axial gaps are respectively reserved between the outer brake pad and the piston and between the inner brake pad and the bearing seat, hydraulic oil is filled in the loosening oil cavity, and the pressure in the loosening oil cavity is equal to the spring force of the rectangular springs; during braking, under the extrusion of the piston, the front side surface of the outer brake pad is in surface contact with the rear side surface of the inner brake pad, and the front side surface of the inner brake pad is in contact with the bearing seat.
2. The rotating shaft braking device with the safety function as claimed in claim 1, wherein the outer side of the outer brake pad in the axial direction is fixed to the bearing seat, the inner side of the inner brake pad in the axial direction is fixed to the rotating shaft, the inner side of the outer brake pad in the axial direction is opposite to the outer side of the inner brake pad in the axial direction, and the outer side of the inner brake pad in the axial direction is opposite to the bearing seat.
3. The rotating shaft braking device with the safety function as claimed in claim 1, wherein an adjusting pad is fixed on the rotating shaft, a first gland is arranged behind the adjusting pad, the inner brake pad is tightly pressed between the first gland and the adjusting pad, and a plurality of first screws respectively penetrate through the first gland, the inner brake pad and the adjusting pad to fix the three on the rotating shaft.
4. The rotating shaft braking device with the safety function as claimed in claim 1, wherein a plurality of grooves are formed in the front side of the cylinder cover, and one rectangular spring is installed in each groove.
5. The safety-functioning rotating shaft brake apparatus as claimed in claim 1, a plurality of first O-shaped sealing rings are arranged between the cylinder body and the bearing seat, a plurality of second O-shaped sealing rings are arranged between the oil cylinder cover and the bearing seat, a plurality of third O-shaped sealing rings are arranged between the oil cylinder cover and the cylinder body, a bidirectional piston seal and a unidirectional piston seal are respectively arranged between the piston and the cylinder body, a pull rod seal is arranged between the piston and the oil cylinder cover, the front side of the clamping oil cavity is sealed by the bidirectional piston seal and the pull rod seal, the rear side of the clamping oil cavity is sealed by the third O-shaped sealing ring, the front side of the loosening oil cavity is sealed by the one-way piston, and the rear side of the loosening oil cavity is sealed by the two-way piston.
6. The rotating shaft braking device with the safety function as claimed in claim 1, wherein an oil drain hole communicated with the annular cavity and used for guiding out excess oil is formed in the side wall of the bearing seat.
7. The rotating shaft braking device with the safety function as claimed in claim 6, wherein the outer brake pad is provided with a plurality of axial through holes, and the plurality of axial through holes are respectively communicated with the oil drainage hole.
8. The rotating shaft brake device with a safety function as claimed in claim 1, wherein a first rotary sealing member is disposed between the rotating shaft and the cylinder assembly, an outer annular surface and an inner annular surface of the first rotary sealing member are respectively in contact with the cylinder head and the rotating shaft surface, the first rotary sealing member is axially retained at a rear end of the cylinder head by a second gland, and the second gland is fixed to the cylinder head.
9. The rotating shaft braking device with a safety function as claimed in claim 1, wherein a second rotary sealing member is disposed between the rotating shaft and the bearing housing, an outer annular surface and an inner annular surface of the second rotary sealing member are in surface contact with the bearing housing and the rotating shaft, respectively, the second rotary sealing member is axially retained at a front end of the rotating shaft and the bearing housing by a dust cap, and the dust cap is fixed to the rotating shaft.
10. The rotating shaft brake device with a safety function as claimed in claim 1, wherein the rotating shaft is rotatably installed on the bearing housing through a YRT bearing, the rotating shaft is connected with an inner ring of the YRT bearing through a second screw, and the bearing housing is connected with an outer ring of the YRT bearing through a third screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910122.2U CN210623425U (en) | 2019-06-17 | 2019-06-17 | Rotating shaft braking device with safety function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920910122.2U CN210623425U (en) | 2019-06-17 | 2019-06-17 | Rotating shaft braking device with safety function |
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| Publication Number | Publication Date |
|---|---|
| CN210623425U true CN210623425U (en) | 2020-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920910122.2U Active CN210623425U (en) | 2019-06-17 | 2019-06-17 | Rotating shaft braking device with safety function |
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| Country | Link |
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| CN (1) | CN210623425U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242685A (en) * | 2019-06-17 | 2019-09-17 | 宁波海天精工股份有限公司 | A kind of rotation shaft brake device with safety function |
-
2019
- 2019-06-17 CN CN201920910122.2U patent/CN210623425U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110242685A (en) * | 2019-06-17 | 2019-09-17 | 宁波海天精工股份有限公司 | A kind of rotation shaft brake device with safety function |
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