CN204175839U - The wet multi-disc brake in automatic adjustable brake gap - Google Patents
The wet multi-disc brake in automatic adjustable brake gap Download PDFInfo
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- CN204175839U CN204175839U CN201420551815.4U CN201420551815U CN204175839U CN 204175839 U CN204175839 U CN 204175839U CN 201420551815 U CN201420551815 U CN 201420551815U CN 204175839 U CN204175839 U CN 204175839U
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Abstract
The purpose of this utility model is to provide the wet multi-disc brake in automatic adjustable brake gap of a kind of compact structure, energy-conserving and environment-protective, to realize brake clearance auto-compensation, improves braking safety.The technical solution of the utility model is: the piston rod of its piston is shaped with a circle groove, respective slot is overlapped on the piston rod successively back-up ring and lining, back-up ring internal diameter is greater than groove section diameter, is less than recess edge diameter, external diameter is greater than recess edge diameter, lining and hydraulic pressure cavity inwall adopt large interference fit, back-up ring and lining adopt weak interference fit, and between back-up ring and lining, frictional force is greater than return spring returning place force, much smaller than hydraulic braking thrust.The utility model is applicable to fork truck brake field.
Description
Technical field
The utility model relates to a kind of wet multi-disc brake of automatic adjustable brake gap.Be applicable to fork truck brake field.
Background technique
Break on drive axle of electronic forklift generally uses hydraulic pressure single-wheel cylinder, booster type, drum brake, blow-by during brake operation due to this kind of form, be subject to working environment factor (temperature, muddy water, greasy dirt) impact, not only volume is large, and unstable properties, rate of fault is high, and client's complaint increases day by day; The dust four that during work, wearing and tearing produce falls apart, the environment optimization trend requirement of extremely inadaptable nowadays increasingly stringent.Wet brake substantially overcomes above shortcoming, but current wet brake friction plate in use can wear and tear in outlet, thus causes brake clearance to increase, and affects brake safe.
Summary of the invention
The technical problems to be solved in the utility model is: for above-mentioned Problems existing, provides the wet multi-disc brake in automatic adjustable brake gap of a kind of compact structure, energy-conserving and environment-protective, to realize brake clearance auto-compensation, improves braking safety.
The technological scheme that the utility model adopts is: a kind of wet multi-disc brake of automatic adjustable brake gap, comprise supporting mass, be formed on the hydraulic pressure cavity on supporting mass, be placed in the piston of hydraulic pressure cavity, be placed on the return spring on piston, be connected to the platen of piston outer end, and the friction plate assembly corresponding with platen position, the axial clearance of reserved setting between platen and friction plate assembly, it is characterized in that: the piston rod of described piston is shaped with a circle groove, respective slot is overlapped on the piston rod successively back-up ring and lining, described back-up ring internal diameter is greater than groove section diameter, be less than recess edge diameter, external diameter is greater than recess edge diameter, described lining and hydraulic pressure cavity inwall adopt large interference fit, back-up ring and lining adopt weak interference fit, between back-up ring and lining, frictional force is greater than return spring returning place force, much smaller than hydraulic braking thrust.
Described groove groove width is the axial clearance sum of back-up ring width and setting.
Described hydraulic pressure cavity is rectangle groove, and the piston head size of piston and hydraulic pressure cavity are coincide.
Arrange hand lever between bottom the piston-rod end of described piston and hydraulic pressure cavity, this hand lever is fixed on hydraulic pressure cavity inwall through hand braking stationary axle.
The beneficial effects of the utility model are: in the utility model, piston is supported in hydraulic pressure cavity through back-up ring and lining successively, and the frictional force between back-up ring and lining is greater than spring return function power but much smaller than retrothrust.When after friction disc wear, the distance of piston-advance increases, and back-up ring is moved forward; After end of braking, return spring retracts piston, and because spring force is less than the frictional force between back-up ring, lining, piston just returns less than original position, and piston-advance amount is exactly the wear-thickness of friction plate, thus ensure that the constant of the required oil mass of braking.Piston, back-up ring, supporting mass and lining composition friction disc wear post gap compensation mechanism, safe and reliable, energy-saving and environmental protection, non-maintaining, the life-span is long.
Piston, platen, friction plate assembly composition service braking sytem in the utility model; Hand lever, piston, platen, friction plate assembly composition parking brake system.The present invention integrates service brake to unify the wet multi-disc brake of parking brake system, and structure is simple, compact, safe and reliable, complete machine travelling comfort is good, energy-saving and environmental protection.
Accompanying drawing explanation
Fig. 1 is the structure sectional view of embodiment.
Fig. 2 is the sectional view of piston in embodiment.
Embodiment
As shown in Figure 1, the present embodiment is a kind of wet multi-disc brake of automatic adjustable brake gap, have supporting mass 1 and friction plate assembly 4, on supporting mass 1, corresponding friction plate assembly is shaped with the rectangle groove that is communicated with oil inlet pipe as hydraulic pressure cavity 101, inserts piston 2 in this hydraulic pressure cavity.Piston head 201 size and the hydraulic pressure cavity 101 of piston 2 are coincide; On piston rod 202, cover has return spring 3, and this return spring one end is supported in piston-rod end, and the other end is supported in hydraulic pressure cavity 101 inwall.Piston 2 outer end connects the platen 5 corresponding with friction plate assembly position, and platen is axially fixed in the end face of piston 2, axially reserves the axial clearance set between platen 5 and friction plate assembly 4.
As shown in Figure 2, piston rod 202 is shaped with a circle groove 203 in the present embodiment, and cover has back-up ring 6 in the groove section of piston rod 202, back-up ring 6 is supported on hydraulic pressure cavity 101 through lining 7.Back-up ring 6 internal diameter is greater than groove section diameter, is less than recess edge diameter, and external diameter is greater than recess edge diameter.Lining 7 and hydraulic pressure cavity 101 inwall adopt large interference fit, and back-up ring 6 and lining 7 adopt weak interference fit, and between back-up ring 6 and lining 7, frictional force is greater than return spring 3 returning place force, much smaller than hydraulic braking thrust.This routine further groove 203 groove width is the axial clearance sum of back-up ring 6 width and setting, thus ensures that piston 2 is the axial clearance set relative to the distance of back-up ring 6 movement.
Hand lever 8 is entered in hydraulic pressure cavity 101 interpolation in the present embodiment, between brake rod 8 is placed in bottom piston rod 202 end and hydraulic pressure cavity 101, hand lever 8 side coordinates with left and right wheels brake plunger 2 bar end surface, and this hand lever is fixed on hydraulic pressure cavity 101 inwall through hand braking stationary axle 9.
In this example, friction plate assembly 4 is made up of friction plate and braking plate.Braking plate is provided with four flanges, supporting mass 1 has four grooves, four flanges of braking plate are aimed at and are arranged in the groove of supporting mass 1, locate as braking plate and support 1 circumference, so that when compressing braking plate braking, braking plate only moves axially, pressing friction sheet.
In order to prevent friction disc wear, the gap between platen 5 and friction plate is caused to increase, thus braking needs oil mass to increase, brake petal reduction, present embodiments provides together with being coordinated with supporting mass 1 by return spring 3, piston 2, back-up ring 6, lining 7 and forms clearance self-regulating mechanism.Lining 7 and supporting mass 1 adopt large interference fit, back-up ring 6 and lining 7 adopt weak interference fit, concrete magnitude of interference examines coefficient according to rubbing, spring maximum pull, gone out by finite element method for simulating, this weak interference makes frictional force between back-up ring 6 and lining 7 be greater than return spring 3 returning place force but much smaller than retrothrust.When after friction disc wear, the distance that piston 2 advances increases, and the relative lining 7 of back-up ring 6 is moved forward; After end of braking, return spring 3 retracts piston 2, and because spring force is less than the frictional force between back-up ring 6 and lining 7, piston 2 just returns less than original position, and the amount that piston 2 advances is exactly the wear extent of friction plate, thus ensure that braking needs the constant of oil mass.
Claims (4)
1. the wet multi-disc brake in an automatic adjustable brake gap, comprise supporting mass (1), be formed on the hydraulic pressure cavity (101) on supporting mass, be placed in the piston (2) of hydraulic pressure cavity, be placed on the return spring (3) on piston (2), be connected to the platen (5) of piston (2) outer end, and the friction plate assembly (4) corresponding with platen (5) position, the reserved axial clearance set between platen (5) and friction plate assembly (4), it is characterized in that: the piston rod (202) of described piston (2) is shaped with a circle groove (203), respective slot is overlapped successively on piston rod (202) back-up ring (6) and lining (7), described back-up ring (6) internal diameter is greater than groove section diameter, be less than recess edge diameter, back-up ring external diameter is greater than recess edge diameter, described lining (7) and hydraulic pressure cavity (101) inwall adopt large interference fit, back-up ring (6) and lining (7) adopt weak interference fit, between back-up ring (6) and lining (7), frictional force is greater than return spring (3) returning place force, much smaller than hydraulic braking thrust.
2. the wet multi-disc brake in automatic adjustable brake gap according to claim 1, is characterized in that: described groove (203) groove width is the axial clearance sum of back-up ring (6) width and setting.
3. the wet multi-disc brake in automatic adjustable brake gap according to claim 1 and 2, it is characterized in that: described hydraulic pressure cavity (101) is rectangle groove, piston head (201) size of piston (2) and hydraulic pressure cavity (101) are coincide.
4. the wet multi-disc brake in automatic adjustable brake gap according to claim 1, it is characterized in that: arrange hand lever (8) between piston rod (202) end of described piston (2) and hydraulic pressure cavity (101) bottom, this hand lever is fixed on hydraulic pressure cavity (101) inwall through hand braking stationary axle (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551815.4U CN204175839U (en) | 2014-09-24 | 2014-09-24 | The wet multi-disc brake in automatic adjustable brake gap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420551815.4U CN204175839U (en) | 2014-09-24 | 2014-09-24 | The wet multi-disc brake in automatic adjustable brake gap |
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| Publication Number | Publication Date |
|---|---|
| CN204175839U true CN204175839U (en) | 2015-02-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420551815.4U Active CN204175839U (en) | 2014-09-24 | 2014-09-24 | The wet multi-disc brake in automatic adjustable brake gap |
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| CN (1) | CN204175839U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315049A (en) * | 2014-09-24 | 2015-01-28 | 杭州杭叉桥箱有限公司 | Wet type multi-disc brake capable of automatically adjusting brake gap |
-
2014
- 2014-09-24 CN CN201420551815.4U patent/CN204175839U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315049A (en) * | 2014-09-24 | 2015-01-28 | 杭州杭叉桥箱有限公司 | Wet type multi-disc brake capable of automatically adjusting brake gap |
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