CN103899684A - Gap adjusting mechanism applicable to pull arm type brake - Google Patents
Gap adjusting mechanism applicable to pull arm type brake Download PDFInfo
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- CN103899684A CN103899684A CN201410161688.1A CN201410161688A CN103899684A CN 103899684 A CN103899684 A CN 103899684A CN 201410161688 A CN201410161688 A CN 201410161688A CN 103899684 A CN103899684 A CN 103899684A
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Abstract
The invention discloses a gap adjusting mechanism applicable to a pull arm type brake. The gap adjusting mechanism applicable to the pull arm type brake comprises a first supporting clamping block (6), a supporting spiral sleeve (7), a self-adjusting ratchet wheel belt screw shaft (8), a supporting unthreaded hole sleeve (9) and a second supporting clamping block (10). A left brake shoe clamping connection notch (6a) is formed in the left end of the first supporting clamping block (6), a right brake shoe and pull arm clamping connection notch (10a) is formed in the right end of the second supporting clamping block (10), and the right end of the first supporting clamping block (6) and the supporting spiral sleeve (7) are fixedly connected together. The self-adjusting ratchet wheel belt screw shaft (8) is formed by connecting a screw shaft body (8a), a ratchet wheel (8c) and an unthreaded rod (8b) in sequence from left to right, wherein the screw shaft body (8a) and the supporting spiral sleeve (7) are in screw-thread fit, the unthreaded rod (8b) extends into the supporting unthreaded hole sleeve (9), and the right end of the supporting unthreaded hole sleeve (9) is fixedly connected with the second supporting clamping block (10). After a friction plate is worn, a gap between the friction plate and a brake drum can be automatically adjusted so that the pull arm type brake can be in the optimum state.
Description
Technical field
The present invention relates to Brake for vehicle system, belong to mechanical brake brake assembly technical field, be specifically related to a kind of gap adjusting mechanism that is applicable to draw-arm break.
Background technique
Braking system is the critical component that is related to safety of person vehicle, break belongs to most important safety, critical component in all moving vehicles, the braking system of automobile is divided into various structures form according to the requirement such as reliable, laborsaving, and draw-arm break is a kind of structure conventional in mechanical brake break.
In order to keep good retardation efficiency, between the friction plate in brake shoe assembly and brake drum, to there is a best clearance value.Along with friction disc wear, the gap between brake shoe assembly and brake drum increases, and need to have the mechanism of an adjusting play.
Existing non-self-regulated draw-arm break, its gap adjusting mechanism comprises self-regulated plate and the ratchet cover plate, by stirring self-regulated plate, slide block is combined with the next tooth of the ratchet cover plate.This structure needs artificial moving tooth adjusting play, could meet safety traffic needs, often will be through adjusting and friction plate could be used to the limit for several times, and very trouble; The gap that veteran old driver adjusts may be more reasonable, and the gap that young driver recalls is probably not fully up to expectations.Institute's adjust the play is too small or at all very close to each other, and the consequence causing is to drag to stop, and moment of torsion, the oil consumption of meaningless increase vehicle are high, friction plate consumption fast, shorten the adverse effects such as vehicle service life; If the excesssive gap of adjusting, will increase brake petal and parking hand lever distance, likely cannot meet parking in action radius, there is potential safety hazard.
Summary of the invention
The present invention aims to provide a kind of gap adjusting mechanism that is applicable to draw-arm break, and when after friction disc wear, the optimum state is arrived in the gap that can automatically adjust between brake drum.
For this reason, the technical solution adopted in the present invention is: a kind of gap adjusting mechanism that is applicable to draw-arm break, comprise the first support fixture block (6), support swivel nut (7), self-regulated ratchet band screw axis (8), support unthreaded hole cover (9) and second and support fixture block (10), the described first left end head that supports fixture block (6) is provided with left brake shoe clamping breach (6a), the second right-hand member head that supports fixture block (10) is provided with right braking hoof and torque arm clamping breach (10a), the first right-hand member that supports fixture block (6) is fixed together with support swivel nut (7), described self-regulated ratchet band screw axis (8) is by the screw axis being from left to right connected successively (8a), ratchet (8c) and polished rod (8b) form, screw axis (8a) and support swivel nut (7) screw-thread fit, polished rod (8b) stretches into and supports in unthreaded hole cover (9), the right-hand member and second that supports unthreaded hole cover (9) supports fixture block (10) and is connected.
The working principle that said structure is installed to after draw-arm break is such: when after friction disc wear, while needing parking, parking torque arm is rotated around torque arm pin under the effect of wire-pulling force, self-regulated plate and parking torque arm connect in aggregates by spring, and then rotate, the hook portion of self-regulated plate is mated with the ratchet at self-regulated ratchet band screw axis middle part, self-regulated plate drives ratchet to rotate, thereby drive the second support fixture block to move right, second supports fixture block promotion right braking hoof moves right, thus the length that has extended whole gap adjusting mechanism; Because the two ends of gap adjusting mechanism is by clamping breach and left and right brake shoe clamping, thereby realize the object in automatic adjustment friction plate and brake drum gap.In the time that the gap of friction plate and brake drum increases, when brake shoe released amount exceedes certain limit, stay cord is moved self-regulated plate and the position of the next indented joint of ratchet to, drive the rotation of self-regulated ratchet screw axis, thereby increase the length of gap adjusting mechanism, brake shoe position is moved, recover normal clearance.
Be preferably, described first supports fixture block (6) and supports swivel nut (7) welding, supports unthreaded hole cover (9) and second and supports fixture block (10) welding.
The invention has the beneficial effects as follows: avoided because of gap between brake shoe assembly and brake drum is too small or at all very close to each other caused dragging stop, the series of problems such as the vehicle torque of stopping brought increases, oil consumption is high, friction plate consumption fast because dragging, vehicle service life shortening; And the brake petal bringing because of excesssive gap and parking hand lever are apart from increase, guarantee vehicle parking in action radius, have improved driving safety.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
Fig. 2 is the structural representation of self-regulated ratchet band screw axis.
Fig. 3 is the scheme of installation of the present invention on draw-arm break.
Fig. 4 is the sectional view of Fig. 3.
Embodiment
Below by embodiment also by reference to the accompanying drawings, the invention will be further described:
As shown in Figure 1, gap adjusting mechanism is supported fixture block 10 and is formed by the first support fixture block 6, support swivel nut 7, self-regulated ratchet band screw axis 8, support unthreaded hole cover 9 and second.Support swivel nut 7, self-regulated ratchet band screw axis 8, support coaxially setting of unthreaded hole cover 9.The first left end head that supports fixture block 6 is provided with left brake shoe clamping breach 6a, and the second right-hand member head that supports fixture block 10 is provided with right braking hoof and torque arm clamping breach 10a.
The first right-hand member that supports fixture block 6 is fixed together with support swivel nut 7.Shown in Fig. 2, self-regulated ratchet band screw axis 8 is made up of the screw axis 8a being from left to right connected successively, ratchet 8c and polished rod 8b.Screw axis 8a and support swivel nut 7 screw-thread fit, polished rod 8b stretch into and support in unthreaded hole cover 9, and the right-hand member and the second support fixture block 10 that support unthreaded hole cover 9 are connected.
In conjunction with Fig. 1---shown in Fig. 4, draw-arm break is made up of brake drum 1, brake pump 2, brake shoe assembly 3, parking torque arm 4, self-regulated plate 5, gap adjusting mechanism, shoe spring 11, torque arm pin 12 and stay cord guide pad 13 etc.Brake shoe assembly 3 comprises left brake shoe, right braking hoof, and the arranged outside of each brake shoe has friction plate.Left and right brake shoe is strained by shoe spring 11.On stay cord guide pad 13, be provided with stay cord via hole 13a, pass through for stay cord, stay cord is fixed on the lower end of parking torque arm 4 through stay cord guide pad 13.Parking torque arm 4 is hinged on torque arm pin 12 with self-regulated plate 5, and parking torque arm 4 is solidly fixed with self-regulated plate 5, and self-regulated plate 5 is rotated with parking torque arm 4, in addition, also comprises self-regulated plate return spring.Torque arm pin 12 is fixed on brake shoe assembly 3.Totally two of shoe springs 11, between the upper and lower every setting, the shoe spring 11 that is positioned at top is enclosed within outside gap adjusting mechanism.
Gap adjusting mechanism is stuck on left brake shoe by left brake shoe clamping breach 6a, is stuck in right braking hoof and parking torque arm 4 by right braking hoof and torque arm clamping breach 10a.The ratchet 8c that stirs self-regulated ratchet band screw axis 8 by self-regulated plate 5 rotates, thereby increases the length of gap adjusting mechanism, and the two ends of gap adjusting mechanism are stuck on brake shoe assembly 3, and brake shoe assembly 3 is shifted, with friction compensation pad wear gap.
Claims (2)
1. one kind is applicable to the gap adjusting mechanism of draw-arm break, it is characterized in that: comprise the first support fixture block (6), support swivel nut (7), self-regulated ratchet band screw axis (8), support unthreaded hole cover (9) and second and support fixture block (10), the described first left end head that supports fixture block (6) is provided with left brake shoe clamping breach (6a), the second right-hand member head that supports fixture block (10) is provided with right braking hoof and torque arm clamping breach (10a), the first right-hand member that supports fixture block (6) is fixed together with support swivel nut (7), described self-regulated ratchet band screw axis (8) is by the screw axis being from left to right connected successively (8a), ratchet (8c) and polished rod (8b) form, screw axis (8a) and support swivel nut (7) screw-thread fit, polished rod (8b) stretches into and supports in unthreaded hole cover (9), the right-hand member and second that supports unthreaded hole cover (9) supports fixture block (10) and is connected.
2. the gap adjusting mechanism that is applicable to according to claim 1 draw-arm break, is characterized in that: described first supports fixture block (6) and support swivel nut (7) welding, supports unthreaded hole cover (9) and second and supports fixture block (10) welding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161688.1A CN103899684A (en) | 2014-04-22 | 2014-04-22 | Gap adjusting mechanism applicable to pull arm type brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410161688.1A CN103899684A (en) | 2014-04-22 | 2014-04-22 | Gap adjusting mechanism applicable to pull arm type brake |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103899684A true CN103899684A (en) | 2014-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410161688.1A Pending CN103899684A (en) | 2014-04-22 | 2014-04-22 | Gap adjusting mechanism applicable to pull arm type brake |
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| Country | Link |
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| CN (1) | CN103899684A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0800014A2 (en) * | 1996-04-03 | 1997-10-08 | Nisshinbo Industries, Inc. | Drum type brake device |
| US6125976A (en) * | 1996-10-08 | 2000-10-03 | Nisshinbo Industries Inc. | Drum brake device |
| CN102261407A (en) * | 2010-04-23 | 2011-11-30 | 日清纺制动器株式会社 | Automatic shoe clearance adjustment apparatus |
| CN203796820U (en) * | 2014-04-22 | 2014-08-27 | 重庆市璧山宏向汽配有限公司 | Gap regulating mechanism suitable for draw arm type brake |
-
2014
- 2014-04-22 CN CN201410161688.1A patent/CN103899684A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0800014A2 (en) * | 1996-04-03 | 1997-10-08 | Nisshinbo Industries, Inc. | Drum type brake device |
| US6125976A (en) * | 1996-10-08 | 2000-10-03 | Nisshinbo Industries Inc. | Drum brake device |
| CN102261407A (en) * | 2010-04-23 | 2011-11-30 | 日清纺制动器株式会社 | Automatic shoe clearance adjustment apparatus |
| CN203796820U (en) * | 2014-04-22 | 2014-08-27 | 重庆市璧山宏向汽配有限公司 | Gap regulating mechanism suitable for draw arm type brake |
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Application publication date: 20140702 |