CN203784162U - Wet brake for tractor - Google Patents
Wet brake for tractor Download PDFInfo
- Publication number
- CN203784162U CN203784162U CN201420097803.9U CN201420097803U CN203784162U CN 203784162 U CN203784162 U CN 203784162U CN 201420097803 U CN201420097803 U CN 201420097803U CN 203784162 U CN203784162 U CN 203784162U
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- China
- Prior art keywords
- friction
- piston
- wet brake
- brake
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
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Abstract
The utility model relates to a brake, particularly to a wet brake for a tractor. The wet brake comprises a case, a piston, a friction plate assembly,friction limiting mechanisms and piston return mechanisms, wherein eachfriction limiting mechanismcomprises a friction positioning rod, a friction resistance ring and a first clamp spring, eachfrictionpositioning rod is provided with a first positioning shaft shoulder and a second positioning shaft shoulder from left to right, and each friction positioning rod is connected with each friction resistance ring through a friction pair; each piston return mechanism comprises a pull rod and a disc spring, each pull rod is glidinglyconnected with the case, and the right end of each pull rod is in threaded connection with the piston; the sum of static friction forces between the friction positioning rods and the friction resistance rings is larger than that of maximum pulling forces of all the disc springs. According to the wet brake, drag friction caused by small return clearances can be effectively overcome, the service life is prolonged by above 20%, an automatic friction plate abrasion compensation function is provided, the piston return clearance is always kept in a range of 0.5+/-0.1 mm, and problems of the long brake response time and the insufficient liquid amount required by brake caused by the large brake clearance are solved.
Description
Technical field
The utility model relates to a kind of break, especially a kind of used with tractor wet brake.
Background technique
Annular piston wet brake is widely used on big-powered tractor, has the smooth-going feature of handling.Its brake safe is reliable, anti-ageing moving back, and compact structure is applicable to working under rugged environment very much.Its working principle is: driver steps on after brake petal, brake fluid is entered the closed area (seeing Fig. 1) being surrounded by brake casing 1, piston 2 and seal ring 6 by brake fluid filler opening 7, brake fluid promotes piston and moves ahead, and promote friction plate assembly 3 and be close to transmission case body side, frictionally produces braking.
But the piston return amount of existing annular piston wet brake between 0.15-0.25mm, when friction plate sheet number is more, is dawdled between sheet more serious conventionally.If break is without clearance self-regulating function in addition, after friction disc wear, gap value after friction plate return and between braking surface can increase, when this can cause brake next time, piston stroke is excessive, and the sensitivity of impact braking, so just needs frequently more renewal of facing renewal, caused the waste of friction plate, moreover wet brake is between driving axle housing and transmission case body, friction plate is immersed in gearbox gear oil, and dismounting and change friction plate workload is large.Solve brake bush for this reason and dawdle, improve the working life of brake bush, reduce the problem that the frequency is a needs solution of changing.
Model utility content
The utility model is mainly for above problem, a kind of used with tractor wet brake is provided, it can effectively overcome because of little the dawdling of causing in return gap, improve working life more than 20%, band friction disc wear automatic compensation function, does not need artificial adjustment, and piston return gap remains at 0.5 ± 0.1 millimeter, the problem of avoiding causing braking response time length because brake clearance is excessive and braking required liquid measure deficiency, its technological scheme is as follows:
A used with tractor wet brake, comprising: housing, piston, friction plate assembly, friction position-limit mechanism and piston return mechanism;
Described friction position-limit mechanism comprises: friction positioning rod, surface friction drag ring and the first jump ring, described friction positioning rod has the first location shaft shoulder and the second location shaft shoulder from left to right, on described housing, offer receiving hole, on described piston, offer blind hole, surface friction drag ring is threaded onto in receiving hole, described friction positioning rod is threaded onto in surface friction drag ring and by friction pair and is connected with surface friction drag ring, and described the first jump ring is flush-mounted in blind hole and is positioned at the left side of the second location shaft shoulder of friction positioning rod;
Described piston return mechanism comprises: pull bar and the dish spring that the pulling force of pull bar one right-to-left is provided, and described pull bar and housing are slidably connected, and described pull bar right-hand member is connected with piston thread;
Described friction position-limit mechanism and piston return mechanism are all at least two, around the axis of piston, are uniformly distributed;
The summation of the stiction between all friction positioning rods and surface friction drag ring is greater than the summation of the maximum pull of all dish springs.
On technique scheme basis, described piston return mechanism also comprises rectangular seal, and described rectangular seal is fixed in housing and is set on pull bar, described rectangular seal and pull bar interference fit.
On technique scheme basis, described friction position-limit mechanism also comprises the first jump ring of limiting friction resistance hoop left dislocation, and described the first jump ring is fixed in receiving hole and with surface friction drag ring and contacts.
On technique scheme basis, described the first jump ring right side is 0.5 ± 0.1mm apart from the maximal clearance amount between the second location shaft shoulder.
On technique scheme basis, the right side of described friction plate assembly and the gap between braking surface are set as 0.5mm.
On technique scheme basis, described friction position-limit mechanism and piston return mechanism are four, and the value of elastic of each dish spring is set as 150N.
On technique scheme basis, the friction factor between described surface friction drag ring and friction positioning rod is 0.5.
The utlity model has following advantage:
A) piston return gap is 0.5 ± 0.1 millimeter, much larger than the 0.15-0.25mm of existing break, has effectively overcome because of little the dawdling of causing in return gap, and improve more than 20% working life.
B) band friction disc wear automatic compensation function, does not need artificial adjustment, has reduced use and maintenance difficulty.Piston return gap remains at 0.5 ± 0.1 millimeter, the problem of having avoided causing braking response time length after friction disc wear because brake clearance is excessive and having braked required liquid measure deficiency.
C) relatively simple for structure, assembling and maintenance difficulty are low, and reliability is high.
Accompanying drawing explanation
Fig. 1: the cross-sectional view of prior art;
Fig. 2: prior art face structural representation;
Fig. 3: cross-sectional view of the present utility model;
Fig. 4: the structural representation of facing of the present utility model;
Fig. 5: the structural representation of friction position-limit mechanism described in the utility model;
Fig. 6: the structural representation of friction positioning rod described in the utility model;
Fig. 7: the structural representation of piston return mechanism described in the utility model;
Embodiment
Below in conjunction with accompanying drawing and example, the utility model is described in further detail:
As shown in Fig. 3 to Fig. 7, a kind of used with tractor wet brake, is characterized in that, comprising: housing 1, piston 2, friction plate assembly 3, friction position-limit mechanism 4 and piston return mechanism 5;
Described friction position-limit mechanism 4 comprises: friction positioning rod 10, surface friction drag ring 11 and the first jump ring 12, described friction positioning rod 10 has the first location shaft shoulder 14 and the second location shaft shoulder 15 from left to right, on described housing 1, offer receiving hole 16, on described piston 2, offer blind hole 17, surface friction drag ring 11 is threaded onto in receiving hole 16, it should be noted that surface friction drag ring 11 fixes with respect to housing 1 all the time herein, fixing method has a lot, existing means of fixation all can, as with receiving hole 16 interference fit etc. but a kind of mode that is not limited only to enumerate herein, described friction positioning rod 10 is threaded onto in surface friction drag ring 11 and by friction pair and is connected with surface friction drag ring 11, described the first jump ring 12 is flush-mounted in blind hole 17 and is positioned at the left side of the second location shaft shoulder 15 of friction positioning rod 10,
It should be noted that the first location shaft shoulder 14 mainly works to be convenient to assembling herein, by setting the first location shaft shoulder 14 to the distance between friction positioning rod right side 19 and the hole depth of receiving hole 16, just can determine the initial distance 31 between piston 2 and housing 1;
Described piston return mechanism 5 comprises: pull bar 21 and the dish spring 22 that the pulling force of pull bar 21 1 right-to-lefts is provided, and described pull bar 21 is slidably connected with housing 1, and described pull bar 21 right-hand members are threaded with piston 2;
Described friction position-limit mechanism 4 and piston return mechanism 5 are all at least two, around the axis of piston, are uniformly distributed;
The summation of the stiction between all friction positioning rods 10 and surface friction drag ring 11 is greater than the summation of the maximum pull of all dish springs 22.
Preferably, described piston return mechanism 5 also comprises rectangular seal 20, and described rectangular seal 20 is fixed in housing 1 and is set on pull bar 21, described rectangular seal 20 and pull bar 21 interference fit.
Preferably, described friction position-limit mechanism 4 also comprises that limiting friction resistance ring 11 is to the first jump ring 13 of left dislocation, and described the first jump ring 13 is fixed in receiving hole 16 and with surface friction drag ring 11 and contacts.
Preferably, described the first jump ring 12 right sides are 0.5 ± 0.1mm apart from the maximal clearance amount 30 between the second location shaft shoulder 15.
Preferably, the right side of described friction plate assembly 3 and the gap between braking surface are set as 0.5mm.
During initial installation, first shaft shoulder 14 of friction positioning rod 10 contacts with the right side of housing 1, contacts, thereby define the initial position (seeing Fig. 5) of piston at the bottom of the hole of rub positioning rod right side 19 and blind hole 17.
During braking, brake fluid enters by brake fluid filler opening 7 closed area (seeing Fig. 3) being surrounded by brake casing 1, piston 2 and seal ring 6 thereby promoting piston 2 advances, when piston 2 moving displacements are not more than 0.5mm, friction positioning rod 10 does not move relative to surface friction drag ring 11.After friction disc wear, when the braking distance of piston 2 need be greater than 0.5mm, after the second location shaft shoulder 15 of friction positioning rod 10 first contacts with the first jump ring 12, the first jump ring 12 can hinder the relative movement between friction positioning rod 10 and piston, now because the hydraulic pressure at piston place will be much larger than the stiction between friction positioning rod 10 and surface friction drag ring 11, therefore the first jump ring 12 meeting drawing friction positioning rods 10 move from left to right a segment distance (housing 1 is static relatively all the time for this process surface friction drag ring 11) relative to surface friction drag ring 11 and finally complete braking operation, after braking is removed, hydraulic coupling reduces to 0, piston is return under the active force of dish spring 22, because the pulling force of dish spring is less than the stiction between friction positioning rod 10 and surface friction drag ring 11, therefore while contacting at the bottom of piston is returned to the hole of friction positioning rod 10 right sides and blind hole 17, piston is just parked in new position, now the distance between piston 2 and housing 1 31 becomes the large wearing clearance forming after friction disc wear that also just made up, realize automatically and regulating, the first jump ring 12 right sides are always 0.5 ± 0.1mm apart from the maximal clearance amount 30 between the second location shaft shoulder 15.
In the specification that herein needs to illustrate, mentioned left and right (direction) is all to take Fig. 3 as reference, and the left-hand of Fig. 3 is left-hand mentioned in specification, and the dextrad of Fig. 3 is dextrad mentioned in specification.
Further, described friction position-limit mechanism 4 and piston return mechanism 5 are four, and the value of elastic of each dish spring 22 is set as 150N.
Further again, the friction factor between described surface friction drag ring 11 and friction positioning rod 10 is 0.5.
With way of example, the utility model is illustrated above, but the utility model is not limited to above-mentioned specific embodiment, all any changes of doing based on the utility model or modification all belong to the claimed scope of the utility model.
Claims (7)
1. a used with tractor wet brake, is characterized in that, comprising: housing (1), piston (2), friction plate assembly (3), friction position-limit mechanism (4) and piston return mechanism (5);
Described friction position-limit mechanism (4) comprising: friction positioning rod (10), surface friction drag ring (11) and the first jump ring (12), described friction positioning rod (10) has the first location shaft shoulder (14) and the second location shaft shoulder (15) from left to right, on described housing (1), offer receiving hole (16), on described piston (2), offer blind hole (17), surface friction drag ring (11) is threaded onto in receiving hole (16), described friction positioning rod (10) is threaded onto in surface friction drag ring (11) and by friction pair and is connected with surface friction drag ring (11), described the first jump ring (12) is flush-mounted in blind hole (17) and is positioned at the left side of the second location shaft shoulder (15) of friction positioning rod (10),
Described piston return mechanism (5) comprising: pull bar (21) and the dish spring (22) of the pulling force of pull bar (21) one right-to-lefts is provided, described pull bar (21) is slidably connected with housing (1), and described pull bar (21) right-hand member is threaded with piston (2);
Described friction position-limit mechanism (4) and piston return mechanism (5) are all at least two, around the axis of piston, are uniformly distributed;
The summation of the stiction between all friction positioning rods (10) and surface friction drag ring (11) is greater than the summation of the maximum pull of all dish springs (22).
2. a kind of used with tractor wet brake according to claim 1, it is characterized in that: described piston return mechanism (5) also comprises rectangular seal (20), described rectangular seal (20) is fixed in housing (1) and is set in pull bar (21) above, described rectangular seal (20) and pull bar (21) interference fit.
3. a kind of used with tractor wet brake according to claim 1, it is characterized in that: described friction position-limit mechanism (4) also comprises that limiting friction resistance ring (11) is to first jump ring (13) of left dislocation, and described the first jump ring (13) is fixed in receiving hole (16) and with surface friction drag ring (11) and contacts.
4. a kind of used with tractor wet brake according to claim 3, is characterized in that: described the first jump ring (12) right side is 0.5 ± 0.1mm apart from the maximal clearance amount (30) between the second location shaft shoulder (15).
5. a kind of used with tractor wet brake according to claim 4, is characterized in that: the right side of described friction plate assembly (3) and the gap between braking surface are set as 0.5mm.
6. a kind of used with tractor wet brake according to claim 1, is characterized in that: described friction position-limit mechanism (4) and piston return mechanism (5) are four, and the value of elastic of each dish spring (22) is set as 150N.
7. a kind of used with tractor wet brake according to claim 1, is characterized in that: the friction factor between described surface friction drag ring (11) and friction positioning rod (10) is 0.5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420097803.9U CN203784162U (en) | 2014-02-28 | 2014-02-28 | Wet brake for tractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420097803.9U CN203784162U (en) | 2014-02-28 | 2014-02-28 | Wet brake for tractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784162U true CN203784162U (en) | 2014-08-20 |
Family
ID=51320353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420097803.9U Withdrawn - After Issue CN203784162U (en) | 2014-02-28 | 2014-02-28 | Wet brake for tractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203784162U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807337A (en) * | 2014-02-28 | 2014-05-21 | 青岛华瑞汽车零部件股份有限公司 | Wet brake for tractor |
| CN108138881A (en) * | 2015-09-24 | 2018-06-08 | 日立建机株式会社 | Industrial wheeled equipment |
| CN112747055A (en) * | 2021-01-29 | 2021-05-04 | 第一拖拉机股份有限公司 | Brake with automatic adjusting mechanism |
-
2014
- 2014-02-28 CN CN201420097803.9U patent/CN203784162U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103807337A (en) * | 2014-02-28 | 2014-05-21 | 青岛华瑞汽车零部件股份有限公司 | Wet brake for tractor |
| CN103807337B (en) * | 2014-02-28 | 2016-08-24 | 青岛华瑞汽车零部件股份有限公司 | A kind of used with tractor wet brake |
| CN108138881A (en) * | 2015-09-24 | 2018-06-08 | 日立建机株式会社 | Industrial wheeled equipment |
| CN108138881B (en) * | 2015-09-24 | 2019-08-20 | 日立建机株式会社 | Industrial wheeled equipment |
| CN112747055A (en) * | 2021-01-29 | 2021-05-04 | 第一拖拉机股份有限公司 | Brake with automatic adjusting mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160824 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |