CN217582954U - Friction braking structure of engineering machinery speed reducer - Google Patents
Friction braking structure of engineering machinery speed reducer Download PDFInfo
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- CN217582954U CN217582954U CN202221490852.XU CN202221490852U CN217582954U CN 217582954 U CN217582954 U CN 217582954U CN 202221490852 U CN202221490852 U CN 202221490852U CN 217582954 U CN217582954 U CN 217582954U
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Abstract
The friction braking structure of the engineering machinery speed reducer comprises a driving shaft, a piston cylinder sleeved outside the driving shaft through a flange plate, a piston arranged in the piston cylinder, and a brake seat sleeved outside the driving shaft and coaxially connected with the piston cylinder, wherein a braking cavity communicated with the inner cavity of the piston cylinder is formed between the driving shaft and the brake seat, an inner friction plate is connected to a spline on the driving shaft, an outer friction plate is connected to a spline on the brake seat, the inner friction plate and the outer friction plate are alternately distributed in the braking cavity along the axial direction, the adjacent outer friction plate is separated from the inner friction plate and does not contact with the inner friction plate, the inner friction plate is pressed by the outer friction plate along with the compression of the piston, a separation elastic sheet is clamped between the adjacent outer friction plates, the separation elastic sheet deforms along with the compression of the piston, and rebounds along with the return movement of the piston to separate the adjacent outer friction plate from the inner friction plate. The utility model discloses guarantee driven promptness, promote to stop to open the accuse of state conversion and feel, prolong the life of inside and outside friction disc, reduce the temperature rise in the brake chamber, improve the braking security.
Description
Technical Field
The utility model relates to a friction braking structure of engineering machine speed reducer belongs to engineering machine speed reducer technical field.
Background
In the engineering machinery speed reducer, the brake is used as an important part for controlling the speed reducer to start and stop, in the crane, the rotary speed reducer, the walking speed reducer and the winch speed reducer are arranged at different positions to play different roles, and because the engineering machinery corresponds to a large hoisting object, the brake is arranged in the speed reducer for ensuring the driving safety, and the brake mainly refers to the mutual combination friction or separation of friction plates, so that the combination and separation of a transmission shaft and a rack are controlled, and the start and stop are realized. Under normal conditions, the friction plate is in a closed containing cavity, when the brake is started and stopped frequently, the temperature rise of the brake is increased due to friction heating, further, materials are expanded, the mechanical clearance is reduced, the internal air pressure is increased, the sealing element leaks oil if the internal air pressure is low, and the cylinder is fried if the internal air pressure is high; meanwhile, due to the fact that temperature rise is too high, the friction plates can be separated out untimely, power transmission is untimely, and operation feeling is poor.
SUMMERY OF THE UTILITY MODEL
The utility model provides a friction braking structure of engineering machine speed reducer, outer friction disc and interior friction disc in time separate not adhesion under the effect of separation shell fragment resilience force, guarantee driven promptness, promote the accuse of stopping opening the state conversion and handle the sense, the in time separation of inside and outside friction disc reduces the friction and generates heat, prolongs the life of inside and outside friction disc, reduces the temperature rise in the braking chamber, improves the braking security.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
friction braking structure of engineering machine tool speed reducer, including the drive shaft, through the ring flange suit in the outer piston cylinder of drive shaft, the piston of dress in the piston cylinder and suit outside the drive shaft and with piston cylinder coaxial coupling's brake seat, form the brake chamber with piston cylinder inner chamber UNICOM between drive shaft and the brake seat, splined connection inner disc on the drive shaft, splined connection outer friction disc on the brake seat, inner friction disc and outer friction disc distribute along axial in turn in the brake chamber, adjacent outer friction disc separates contactless with the inner friction disc, outer friction disc compresses tightly the inner friction disc along with compressing tightly of piston, its characterized in that: a separating elastic sheet is clamped between the adjacent outer friction plates, deforms along with the compression of the piston and rebounds along with the return movement of the piston to separate the adjacent outer friction plates from the inner friction plates.
Preferably, the inner friction plate extends into the space between two adjacent outer friction plates, and the separating elastic sheet is annular and is arranged on the periphery of the inner friction plate and is not in contact with the inner friction plate.
Preferably, the separating elastic sheet is a non-flat elastic sheet with a curved surface, and the separating elastic sheet is clamped and narrowed by the adjacent outer friction plates along with the compression of the piston.
Preferably, the separation elastic sheet is in a sine curved surface shape along the circumferential direction.
Preferably, the piston is internally provided with an axial compression spring group which pushes the piston to move and extend into the brake cavity to press the outer friction plate.
Preferably, the piston is provided with an installation cavity arranged along the axial direction, the compression spring group is arranged in the installation cavity, and the outer end of the compression spring group abuts against the flange plate.
Preferably, an oil storage cavity is formed between the piston and the piston cylinder, an oil inlet nozzle communicated with the oil storage cavity is arranged on the piston cylinder, and oil is injected into the oil storage cavity through the oil inlet nozzle to push the piston to move back and be separated from the outer friction plate.
Preferably, the brake base is provided with a breather plug communicated with the brake cavity.
The utility model has the advantages that:
1. the utility model discloses an interior friction disc rotates with the drive shaft is synchronous in the friction braking structure of engineering machine tool speed reducer, outer friction disc and stopper seat keep motionless, the separation shell fragment presss from both sides between adjacent outer friction disc, piston and outer friction disc separation when the drive shaft rotates, interior friction disc separates contactless with outer friction disc, the separation shell fragment is indeformable, the piston removes to stretch into during the braking and compresses tightly outer friction disc in the braking chamber, the separation shell fragment pressurized deformation, outer friction disc compresses tightly inner friction disc, inner friction disc stall, thereby make the drive shaft stall, realize the braking, piston rebound and outer friction disc separation during the drive, outer friction disc and inner friction disc timely separation are not adherent under the effect of separation shell fragment resilience power, guarantee driven promptness, promote the accuse sense of handling of stop-start state conversion, the timely separation of inside and outside friction disc reduces the friction and generates heat, the life of inside and outside friction disc is prolonged, reduce the temperature rise in the braking chamber, improve the braking security.
2. The separating elastic sheet is a curved uneven elastic sheet, when the outer friction sheets are compressed by the axial movement of the piston, the distance between the adjacent outer friction sheets is reduced, the separating elastic sheet is narrowed along the axial direction, meanwhile, the outer friction sheets compress the inner friction sheets to form friction braking, when the piston moves back to be separated from the outer friction sheets, the separating elastic sheet rebounds along the axial direction, the rebounding force acts on the outer friction sheets to enable the outer friction sheets to be separated from the inner friction sheets quickly, and the inner and outer friction sheets are guaranteed to be separated timely and effectively.
Drawings
Fig. 1 is a half-sectional schematic view of a friction braking structure of a construction machine speed reducer according to an embodiment.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a front view of the separating spring.
Fig. 4 is a side view of a breakaway tab.
Detailed Description
The following describes embodiments of the present invention in detail with reference to fig. 1 to 4.
Friction braking structure of engineering machine tool speed reducer, including drive shaft 1, the piston cylinder 3 of 2 suits of ring flange outside drive shaft 1, piston 4 of dress in piston cylinder 3 and suit are outside drive shaft 1 and with the brake seat 5 of 3 coaxial coupling of piston cylinder, form the brake chamber 6 with 3 inner chamber UNICOM of piston cylinder between drive shaft 1 and the brake seat 5, splined connection inner disc 7 is gone up to drive shaft 1, splined connection outer disc 8 is gone up to brake seat 5, inner disc 7 and outer disc 8 distribute along axial in turn in brake chamber 6, adjacent outer disc 8 separates contactless with inner disc 7, outer disc 8 compresses tightly inner disc 7 along with compressing tightly of piston 4, its characterized in that: a separation elastic sheet 9 is clamped between the adjacent outer friction sheets 8, the separation elastic sheet 9 deforms along with the compression of the piston 4, and rebounds along with the return movement of the piston 4 to separate the adjacent outer friction sheets 8 from the inner friction sheets 7.
In the friction braking structure of the engineering machinery speed reducer, the inner friction plate 7 and the driving shaft 1 synchronously rotate, the outer friction plate 8 and the brake seat 5 are kept still, the separating elastic sheet 9 is clamped between the adjacent outer friction plates 8, the piston 4 is separated from the outer friction plates 8 when the driving shaft 1 rotates, the inner friction plates 7 are separated from the outer friction plates 8 and are not in contact, the separating elastic sheet 9 is not deformed, the piston 4 moves to extend into the braking cavity 6 to press the outer friction plates 8 during braking, the separating elastic sheet 9 is deformed under pressure, the outer friction plates 8 press the inner friction plates 7, and the inner friction plates 7 stop rotating, so that the driving shaft 1 stops rotating, braking is realized, the piston 4 moves back to be separated from the outer friction plates 8 during driving, the outer friction plates 8 are timely separated from the inner friction plates 7 and are not adhered under the resilience force of the separating elastic sheet 9, the timeliness of transmission is ensured, the control feeling of switching between the stop and start states is improved, the timely separation of the inner friction plates and the outer friction plates reduces the friction heating, the service life of the inner friction plates and the outer friction plates, the temperature rise in the braking cavity is reduced, and the braking safety is improved.
Wherein, the inner friction plate 7 extends into between two adjacent outer friction plates 8, and the separating elastic sheet 9 is annular and is arranged on the periphery of the inner friction plate 7 and is not contacted with the inner friction plate 7. The separation elastic sheet 9 is ensured not to move the rotation of the inner friction sheet 7 to form interference, and the outer friction sheet 8 is pressed tightly to deform during braking, and when the pressing force of the outer friction sheet 8 disappears, the outer friction sheet 8 is rebounded to push away, so that the outer friction sheet 8 is separated from the inner friction sheet 7 in time.
The separating elastic sheet 9 is a non-flat elastic sheet with a curved surface, and the separating elastic sheet 9 is clamped and narrowed by the adjacent outer friction sheet 8 along the axial direction along with the compression of the piston 4. The separating elastic sheet 9 is in a non-flat curved surface shape under the non-pressed state, narrows along the axial direction after being pressed, the distance between the adjacent outer friction sheets 8 is reduced, the inner friction sheets 7 are compressed to form friction braking, when the piston 4 moves back to be separated from the outer friction sheets 8, the separating elastic sheet 9 rebounds along the axial direction, the rebounding force acts on the outer friction sheets 8, the outer friction sheets 8 are quickly separated from the inner friction sheets 7, and the inner and outer friction sheets are ensured to be timely and effectively separated.
The separating spring plate 9 is in a sine curved surface shape along the circumferential direction, and as shown in fig. 4, the separating spring plate 9 is simpler to machine and form.
The piston 4 is provided with an axial compression spring group 10, and the compression spring group 10 pushes the piston 4 to move and extend into the brake cavity 6 to press the outer friction plate 8. The compression spring group 10 provides axial thrust for the piston 4 to compress the outer friction plates, so that the piston 4 extends into the brake cavity 6 to compress the outermost outer friction plate 8, the outermost outer friction plate 8 is compressed inwards, the inner outer friction plate 8 and the inner friction plate 7 are sequentially compressed, and the separation elastic sheet 8 is compressed and deformed to form friction braking between the inner friction plate and the outer friction plate.
Wherein, piston 4 in open and to have along the installation cavity of axial setting, compression spring group 10 sets up in the installation cavity, and the outer end supports on ring flange 2. In the driving state, the compression spring group 10 is compressed in the piston 4, and the piston 4 is positioned and does not move in the axial direction.
An oil storage cavity 11 is formed between the piston 4 and the piston cylinder 3, an oil inlet nozzle 12 communicated with the oil storage cavity 11 is arranged on the piston cylinder 3, and oil is injected into the oil storage cavity 11 through the oil inlet nozzle 12 to push the piston 4 to move back and be separated from the outer friction plate 8. When the oil storage cavity 11 is filled with oil, the pressure of the oil is greater than the thrust of the compression spring group 10, the piston 4 is positioned, the oil in the oil storage cavity 11 is output from the oil inlet nozzle 12 during braking, the pressure of the oil is smaller than the thrust of the compression spring group 10, the piston 4 is pushed by the compression spring group 10 to press the outer friction plate 8 forwards to form braking, the oil enters the oil storage cavity 11 again from the oil inlet nozzle 12 during driving, the piston 4 is pushed to move back to be separated from the outer friction plate 8, the compression spring group 10 is pressed into the piston 4 again, the piston 4 is repositioned, the operability of the reciprocating motion of the piston 4 is high, and the reliability of starting and stopping state conversion is guaranteed.
Wherein, the brake seat 5 is provided with a breather plug 13 communicated with the brake cavity 6. The vent plug 13 is used for discharging high-temperature gas in the brake cavity 6, so that the air pressure and the temperature in the brake cavity 6 are reduced, and the safety of braking is further improved.
The technical solutions of the embodiments of the present invention are completely described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
Claims (8)
1. Friction braking structure of engineering machine tool speed reducer, including the drive shaft, through the ring flange suit in the outer piston cylinder of drive shaft, the piston of dress in the piston cylinder and suit outside the drive shaft and with piston cylinder coaxial coupling's brake seat, form the brake chamber with piston cylinder inner chamber UNICOM between drive shaft and the brake seat, splined connection inner disc on the drive shaft, splined connection outer friction disc on the brake seat, inner friction disc and outer friction disc distribute along axial in turn in the brake chamber, adjacent outer friction disc separates contactless with the inner friction disc, outer friction disc compresses tightly the inner friction disc along with compressing tightly of piston, its characterized in that: a separating elastic sheet is clamped between the adjacent outer friction plates, deforms along with the compression of the piston and rebounds along with the return movement of the piston to separate the adjacent outer friction plates from the inner friction plates.
2. The friction brake structure of a construction machine speed reducer according to claim 1, wherein: the inner friction plate extends between two adjacent outer friction plates, and the separating elastic sheet is annular and is arranged on the periphery of the inner friction plate and is not in contact with the inner friction plate.
3. The friction brake structure of an engineering machine speed reducer according to claim 2, characterized in that: the separating elastic sheet is a non-flat elastic sheet with a curved surface, and the separating elastic sheet is clamped and narrowed by the adjacent outer friction plates along the axial direction along with the compression of the piston.
4. The friction brake structure of an engineering machine speed reducer according to claim 3, characterized in that: the separating elastic sheet is in a sine curved surface shape along the circumferential direction.
5. The friction brake structure of a construction machine speed reducer according to claim 1, wherein: the piston is internally provided with a compression spring group along the axial direction, and the compression spring group pushes the piston to move and extend into the brake cavity to press the outer friction plate tightly.
6. The friction brake structure of a construction machine speed reducer according to claim 5, wherein: the piston is internally provided with an installation cavity which is arranged along the axial direction, the compression spring group is arranged in the installation cavity, and the outer end of the compression spring group is propped against the flange plate.
7. The friction brake structure of a construction machine speed reducer according to claim 6, wherein: an oil storage cavity is formed between the piston and the piston cylinder, an oil inlet nozzle communicated with the oil storage cavity is arranged on the piston cylinder, and oil is injected into the oil storage cavity through the oil inlet nozzle to push the piston to move back and be separated from the outer friction plate.
8. The friction brake structure of an engineering machine speed reducer according to claim 1, characterized in that: and the brake base is provided with a breather plug communicated with the brake cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221490852.XU CN217582954U (en) | 2022-06-15 | 2022-06-15 | Friction braking structure of engineering machinery speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221490852.XU CN217582954U (en) | 2022-06-15 | 2022-06-15 | Friction braking structure of engineering machinery speed reducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217582954U true CN217582954U (en) | 2022-10-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221490852.XU Active CN217582954U (en) | 2022-06-15 | 2022-06-15 | Friction braking structure of engineering machinery speed reducer |
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| Country | Link |
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| CN (1) | CN217582954U (en) |
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2022
- 2022-06-15 CN CN202221490852.XU patent/CN217582954U/en active Active
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