CN110425238A - A kind of arm for automatically regulating clearance of brake for drum brake - Google Patents
A kind of arm for automatically regulating clearance of brake for drum brake Download PDFInfo
- Publication number
- CN110425238A CN110425238A CN201910725227.5A CN201910725227A CN110425238A CN 110425238 A CN110425238 A CN 110425238A CN 201910725227 A CN201910725227 A CN 201910725227A CN 110425238 A CN110425238 A CN 110425238A
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- China
- Prior art keywords
- brake
- arm
- gear
- clutch ring
- drive
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D65/00—Parts or details
- F16D65/38—Slack adjusters
- F16D65/40—Slack adjusters mechanical
- F16D65/52—Slack adjusters mechanical self-acting in one direction for adjusting excessive play
- F16D65/58—Slack adjusters mechanical self-acting in one direction for adjusting excessive play with eccentric or helical body
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The present invention relates to brake fields, specifically disclose a kind of arm for automatically regulating clearance of brake for drum brake.Arm for automatically regulating clearance of brake is equipped with gap adjusting mechanism, and the gap adjusting mechanism includes drive rod, and the drive rod includes drive section and worm screw section, is arranged with passive helical gear and clutch ring in the drive section；It is equipped with the first transmission component between clutch ring and worm screw section, the second transmission component of single-direction transmission is equipped between passive helical gear and clutch ring；It further include driving wheel and drive bevel gear, described driving wheel one end is equipped with link slot, and the drive bevel gear is equipped with link block corresponding with link slot, and the link block is inserted into link slot；There are gaps in the circumferential direction between the link slot and link block, and torsion spring is equipped between drive bevel gear and driving wheel.Above-described arm for automatically regulating clearance of brake, it is automatic to carry out gap adjustment when generating excessive gaps, guarantee traffic safety.
Description
Technical field
The present invention relates to brake field more particularly to a kind of arm for automatically regulating clearance of brake for drum brake.
Background technique
Vehicle brake gap refers to that when not braking, gap between brake(-holder) block and brake drum, brake clearance is too small, very may be used
Brake drum is contacted with brake(-holder) block when vehicle driving can occur namely brake contact is not thorough；And brake clearance is excessive will lead to
Reaction time is too long or even brake force is insufficient, influences traffic safety.
Brake(-holder) block is after long-term use, it may occur that abrasion, so as to cause brake clearance increase, at this point, needing to braking
Gap is adjusted.The brake clearance adjustment mechanism used on common lorry, trailer and car currently on the market is still manual
Adjust device.By the way that manually the gap increased is eliminated in adjustment under vehicle, it be easy to cause the gap of multiple wheel drags inconsistent,
It causes to brake asynchronous, brake side-slipping.When adjusting brake drum and friction lining gap, needs maintenance personnel to enter vehicle bottom and grasp
Make, operation difficulty is big and there are security risks.In addition, often cannot find and adjust in time often in braking pad wear, cause to go
Vehicle security risk.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of arm for automatically regulating clearance of brake for drum brake, In
It is automatic to carry out gap adjustment when generating excessive gaps, guarantee traffic safety.
In order to solve the above technical problem, the present invention provides technical solution it is as follows: a kind of system for drum brake
Gap automatic regulating arm, including brake arm and control arm are moved, rotary moveable is connected with worm gear, the worm gear on the brake arm
Center at be equipped with connecting hole；Control panel gear, the control panel gear and worm gear are fixedly connected on the control arm
Coaxial arrangement；It further include gap adjusting mechanism, the gap adjusting mechanism includes drive rod, and the drive rod includes driving
Section, and the worm screw that engage with worm gear section are arranged with passive helical gear and clutch ring, the clutch ring position in the drive section
Between passive helical gear and worm screw section；The passive helical gear and clutch ring quilt free to slide in drive section and described
The dynamic one end of helical gear far from clutch ring is connect by reset spring with brake arm；It is equipped between the clutch ring and worm screw section
First transmission component is equipped with the second transmission component of single-direction transmission between the passive helical gear and clutch ring；Further include with
The drive bevel gear of passive helical gear engagement, and the driving wheel engaged with control panel gear, the driving wheel/drive bevel gear
One end is equipped with the link slot around axis setting, and the drive bevel gear/driving wheel is equipped with connection corresponding with link slot
Block, the link block are inserted into link slot；There are gaps in the circumferential direction between the link slot and link block, and
Torsion spring is equipped between drive bevel gear and driving wheel.
When installation, control arm is mounted on automotive axle, worm gear is synchronized and turned by connecting hole and cam axis connection
It is dynamic；The connection of control arm axle stand；Bushing is set on brake arm, and is connect by bushing with gas chamber shift fork.
When being braked, brake arm rotation, due to the self-locking function of worm and gear, worm gear is rotated synchronously with brake arm,
And cam axle is driven, and then friction plate is pushed to move to brake drum.Since control arm and vehicle bridge are directly connected to, at this point, control
Arm processed and control panel gear are relative to brake arm synchronous rotary.In the driving wheel rotation connection slot engaged with control panel gear and company
It connects between block after angle corresponding to gap, driving wheel drives drive bevel gear to rotate synchronously.Under initial brake release state,
At least one is in an off state for first transmission component and the second transmission component, under the promotion of drive bevel gear, passively
Helical gear and clutch ring are moved toward worm screw section direction, until the first transmission component and the second transmission component connect, at this point, driving
The drive of wheel and drive bevel gear, passive helical gear, clutch ring and drive rod rotate synchronously, and by worm screw section driving worm gear into
Row brake clearance is adjusted.In brake release, brake arm is rotated backward with control panel gear, and passive helical gear is made in reset spring
It is separated with lower with clutch ring, drive rod does not rotate, and excessive gaps will not rebound.Meanwhile prepsetting gap angle resets.
The sum of gap between passive helical gear and worm screw section under gap and original state between link slot and link block,
Corresponding brake clearance, the prepsetting gap as brake.When Excessive brake gap is not present in brake, gap adjustment machine
Structure only moves within the scope of prepsetting gap, namely without gap adjustment, to guarantee the normal work of brake.
Preferably, between the passive helical gear and drive section be equipped with sliding sleeve, the clutch ring be located at sliding sleeve with
Between worm screw section, the outer diameter of the sliding sleeve is greater than the internal diameter of clutch ring；The drive rod passes through pressure far from one end of reset spring
Tight spring is connect with brake arm.
After being installed, compressed spring is in compressive state, and passes through drive rod for spring force along transfers to clutch
Ring, under the action of compressed spring, worm screw section, clutch ring, sliding sleeve three, which are in, mutually compresses state.
In braking process, after the completion of brake clearance adjustment, brake arm enters springing stroke, and worm gear can not continue to turn
It is dynamic, under the promotion of passive helical gear and clutch ring, the movement of drive rod axial direction small range, and holddown spring is further compressed, it is
The separation of first transmission component provides condition, effectively prevent load excessive and causes Strength Failure.
And in reseting procedure upon completion of the braking, clutch ring under the action of holddown spring, by worm screw section and is slided always
Set compresses, and avoids clutch ring from rotating with passive helical gear, ensure that the stability at initial setting gap angle.
Preferably, being equipped with installation cavity in the brake arm, the worm gear is arranged in installation cavity body；Further include
With the installation matched cover board of cavity, the cover board is arranged between control panel gear and control arm, and the cover board and control
Arm rotary moveable connection processed；The control arm is connect by cover board with brake arm.
Preferably, being equipped with spline in the connecting hole of the worm gear.
Preferably, first transmission component includes that first engagement of the worm screw section towards clutch ring one end is arranged in
Tooth, and setting clutch ring end and with matched second engaging tooth of the first engaging tooth；The drive bevel gear is far from driving wheel
One end connect with brake arm by compressed spring.After friction plate and brake drum contact, namely when starting braking, brake arm into
Enter the springing stroke stage, since friction plate can't continue to exercise, the braking moment of drive structure of gear worm increases rapidly
Greatly.At this point, holddown spring forced compression, drive rod are moved to holddown spring direction, and then the first transmission component separates, and avoids carrying
Lotus is excessive.
Preferably, first engaging tooth and the second engaging tooth are mutually matched umbrella shape tooth.
Preferably, second transmission component includes that clutch anchor ring is arranged in pass to the first of passive helical gear one end
Movable tooth, and setting passive helical teeth wheel end and with matched second driving cog of the first driving cog；First driving cog
Driving face and transition face are respectively included with the second driving cog, the driving face is parallel to the axis setting of drive rod, and transition face inclines
Tiltedly it is arranged in the axis of drive rod.When passive helical gear is rotated backward relative to transmission direction, two corresponding transition faces it
Between opposite sliding, brake clearance can be caused to rebound with the rotation of passive helical gear to avoid worm screw section and clutch ring.
Detailed description of the invention
Fig. 1 is fragmentary sectional elevation view of the present embodiment for the arm for automatically regulating clearance of brake of drum brake；
Fig. 2 is side partial sectional view of the present embodiment for the arm for automatically regulating clearance of brake of drum brake；
Fig. 3 is perspective view of the present embodiment for the arm for automatically regulating clearance of brake intermediate gap regulating mechanism of drum brake；
Fig. 4 is the present embodiment for helical gear passive in the arm for automatically regulating clearance of brake of drum brake, clutch ring and transmission
Location diagram between bar；
Fig. 5 is explosive view of the present embodiment for clutch module in the arm for automatically regulating clearance of brake of drum brake；
Fig. 6 is perspective view of the present embodiment for drive bevel gear in the arm for automatically regulating clearance of brake of drum brake.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Embodiment
As depicted in figs. 1 and 2, a kind of arm for automatically regulating clearance of brake for drum brake, including brake arm 1 and control
Arm 4 processed, the brake arm 1 is interior to be equipped with installation cavity, and rotary moveable is connected with worm gear 6, the worm gear 6 in installation cavity body
Center at be equipped with connecting hole 3, be equipped with spline in the connecting hole 3 of the worm gear 6.Control is fixedly connected on the control arm 4
Disk gear 11 processed, the control panel gear 11 and worm gear 6 are coaxially disposed.Further include and the matched cover board 5 of cavity is installed, it is described
Cover board 5 be arranged between control panel gear 11 and control arm 4, and the cover board 5 is connect with 4 rotary moveable of control arm；Institute
The control arm 4 stated is connect by cover board 5 with brake arm 1.
It as shown in Figure 3 and Figure 4, further include gap adjusting mechanism, the gap adjusting mechanism includes drive rod, described
Drive rod includes drive section 17, and the worm screw section 2 engaged with worm gear 6, be arranged in the drive section 17 passive helical gear 8,
Sliding sleeve 23 and clutch ring 9, the sliding sleeve 23 is between passive helical gear 8 and drive section 17.The clutch ring 9, which is located at, to be slided
Between set 23 and worm screw section 2, the outer diameter of the sliding sleeve 23 is greater than the internal diameter of clutch ring 9.The drive rod is far from reset spring 7
One end is connect by holddown spring 22 with brake arm 1.The passive helical gear 8 and clutch ring 9 is free to slide in drive section 17,
And the one end of the passive helical gear 8 far from clutch ring 9 is connect by reset spring 7 with brake arm 1.The clutch ring 9
It is equipped with the first transmission component 19 between worm screw section 2, equipped with single-direction transmission between the passive helical gear 8 and clutch ring 9
Second transmission component 20.
As shown in Figure 3 and Figure 4, first transmission component 19 includes that worm screw section 2 is arranged in towards 9 one end of clutch ring
First engaging tooth, and setting 9 end of clutch ring and with matched second engaging tooth of the first engaging tooth.The drive bevel gear 13
One end far from driving wheel 12 is connect by compressed spring 21 with brake arm 1.After friction plate and brake drum contact, namely start
When braking, brake arm 1 enters the springing stroke stage, since friction plate can't continue to exercise, drive structure of gear worm
Braking moment increases rapidly.At this point, 22 forced compression of holddown spring, drive rod are moved to 22 direction of holddown spring, and then first
Transmission component 19 separates, and avoids load excessive.
As shown in Figure 3 and Figure 4, second transmission component 20 includes being arranged in clutch ring 9 towards passive helical gear 8 one
End the first driving cog, and setting passive 8 end of helical gear and with matched second driving cog of the first driving cog.Described
First driving cog and the second driving cog respectively include driving face and transition face, and the axis that the driving face is parallel to drive rod is set
It sets, transition face favours the axis setting of drive rod.When passive helical gear 8 is rotated backward relative to transmission direction, two right
Opposite sliding between the transition face answered can lead to brake clearance with the rotation of passive helical gear 8 to avoid worm screw section 2 and clutch ring 9
Rebound.
It as shown in Figure 3 and Figure 5, further include clutch module, the active that the clutch module is engaged with passive helical gear 8 is oblique
Gear 13, and the driving wheel 12 engaged with control panel gear 11.The clutch module further includes main shaft 15, and the active is oblique
Gear 13 and driving wheel 12 are respectively sleeved on main shaft 15, and the main shaft 15 is connected with spring base far from one end of driving wheel 12
14, the one end of spring base 14 far from drive bevel gear 13 is arranged in the compressed spring 21.
As one embodiment, as shown in Figure 5 and Figure 6, described 12 one end of driving wheel is equipped with the company around axis setting
Access slot, the drive bevel gear 13 are equipped with link block 18 corresponding with link slot, and the link block 18 is inserted into link slot
It is interior；There are gaps in the circumferential direction between the link slot and link block 18, and in drive bevel gear 13 and driving wheel
Torsion spring 16 is equipped between 12.
As another embodiment, with a upper embodiment the difference is that, link slot be arranged in drive bevel gear 13
On, link block 18 is arranged on driving wheel 12.
Under gap and original state between link slot and link block 18 passive helical gear 8 and worm screw section 2 between gap it
With, corresponding brake clearance, the prepsetting gap as brake.When Excessive brake gap is not present in brake, gap tune
Section mechanism only moves within the scope of prepsetting gap, namely without gap adjustment, to guarantee the normal work of brake.
When installation, control arm 4 is mounted on automotive axle, worm gear 6 is synchronized by connecting hole 3 and cam axis connection
Rotation；The connection of 4 axle stand of control arm；Bushing 10 is set on brake arm 1, and is connect by bushing 10 with gas chamber shift fork.
When being braked, brake arm 1 is rotated, and due to the self-locking function of 6 worm screw of worm gear, worm gear 6 turns with brake arm 1 is synchronous
It is dynamic, and cam axle is driven, and then friction plate is pushed to move to brake drum.Since control arm 4 is directly connected to vehicle bridge, this
When, control arm 4 and control panel gear 11 are relative to 1 synchronous rotary of brake arm.In the driving wheel 12 engaged with control panel gear 11
It is rotatablely connected between slot and link block 18 after angle corresponding to gap, driving wheel 12 drives drive bevel gear 13 to rotate synchronously.
Under initial brake release state, at least one is in an off state for the first transmission component 19 and the second transmission component 20,
Under the promotion of drive bevel gear 13, passive helical gear 8 and clutch ring 9 are moved toward 2 directions of worm screw section, until the first transmission component
19 and second transmission component 20 connect, at this point, in the drive of driving wheel 12 and drive bevel gear 13, passive helical gear 8, clutch ring
9 and drive rod rotate synchronously, and by worm screw section 2 drive worm gear 6 progress brake clearance adjusting.
In brake release, brake arm 1 is rotated backward with control panel gear 11, and clutch ring is always in the effect of holddown spring
Under, it is compressed by worm screw section and sliding sleeve, clutch ring will not be rotated with passive helical gear, and passive helical gear 8 is under the effect of reset spring 7
It is separated with clutch ring 9, drive rod does not rotate, and excessive gaps will not rebound.Meanwhile prepsetting gap angle resets.
The above-described arm for automatically regulating clearance of brake for drum brake, when generating excessive gaps, automatically into
In the ranks gap adjusts, and guarantees traffic safety.
In short, the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention, it is all in the present invention
Spirit and principle within made any modifications, equivalent replacements, and improvements etc., should be included in protection scope of the present invention it
It is interior.
Claims (7)
1. a kind of arm for automatically regulating clearance of brake for drum brake, it is characterised in that: including brake arm (1) and control arm
(4), rotary moveable is connected with worm gear (6) on the brake arm (1), is equipped with connecting hole (3) at the center of the worm gear (6)；
Be fixedly connected with control panel gear (11) on the control arm (4), the control panel gear (11) with worm gear (6) is coaxial sets
It sets；
It further include gap adjusting mechanism, the gap adjusting mechanism includes drive rod, and the drive rod includes drive section
(17), the worm screw section (2) and with worm gear (6) engaged, is arranged with passive helical gear (8) and clutch ring in the drive section (17)
(9), the clutch ring (9) is located between passive helical gear (8) and worm screw section (2)；The passive helical gear (8) and clutch
Ring (9) is in the one end of drive section (17) passive helical gear (8) free to slide and described far from clutch ring (9) by resetting bullet
Spring (7) is connect with brake arm (1)；The first transmission component (19) are equipped between the clutch ring (9) and worm screw section (2), it is described
Passive helical gear (8) and clutch ring (9) between be equipped with single-direction transmission the second transmission component (20)；
It further include the drive bevel gear (13) engaged with passive helical gear (8), and the driving wheel engaged with control panel gear (11)
(12), the driving wheel (12)/drive bevel gear (13) one end is equipped with the link slot around axis setting, and the active is oblique
Gear (13)/driving wheel (12) is equipped with link block (18) corresponding with link slot, and the link block (18) is inserted into link slot
It is interior；There are gaps in the circumferential direction between the link slot and link block (18), and in drive bevel gear (13) and drive
Torsion spring (16) are equipped between driving wheel (12).
2. arm for automatically regulating clearance of brake according to claim 1, it is characterised in that: the passive helical gear (8) and
Sliding sleeve (23) are equipped between drive section (17), the clutch ring (9) is located between sliding sleeve (23) and worm screw section (2), the cunning
The outer diameter for covering (23) is greater than the internal diameter of clutch ring (9)；The drive rod passes through holddown spring far from the one end of reset spring (7)
(22) it is connect with brake arm (1).
3. arm for automatically regulating clearance of brake according to claim 1, it is characterised in that: be equipped in the brake arm (1)
Cavity is installed, the worm gear (6) is arranged in installation cavity body；Further include and the installation matched cover board of cavity (5), the lid
Plate (5) is arranged between control panel gear (11) and control arm (4), and the cover board (5) and control arm (4) rotary moveable connect
It connects；The control arm (4) is connect by cover board (5) with brake arm (1).
4. arm for automatically regulating clearance of brake according to claim 1, it is characterised in that: the connecting hole (3) of the worm gear (6)
It is interior to be equipped with spline.
5. arm for automatically regulating clearance of brake described in any one of -4 according to claim 1, it is characterised in that: described first passes
Dynamic component (19) include setting in worm screw section first engaging tooth of (2) towards clutch ring (9) one end, and are arranged in clutch ring (9)
End and with matched second engaging tooth of the first engaging tooth；The drive bevel gear (13) passes through far from the one end of driving wheel (12)
Compressed spring (21) is connect with brake arm (1).
6. arm for automatically regulating clearance of brake according to claim 5, it is characterised in that: first engaging tooth and second
Engaging tooth is mutually matched umbrella shape tooth.
7. arm for automatically regulating clearance of brake according to claim 1, it is characterised in that: second transmission component (20)
It is held in first driving cog of the clutch ring (9) towards passive helical gear (8) one end, and setting in passive helical gear (8) including setting
Portion and with matched second driving cog of the first driving cog；First driving cog and the second driving cog respectively includes driving face
And transition face, the driving face are parallel to the axis setting of drive rod, transition face favours the axis setting of drive rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910725227.5A CN110425238B (en) | 2019-08-07 | 2019-08-07 | Brake clearance automatic adjusting arm for drum brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910725227.5A CN110425238B (en) | 2019-08-07 | 2019-08-07 | Brake clearance automatic adjusting arm for drum brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110425238A true CN110425238A (en) | 2019-11-08 |
| CN110425238B CN110425238B (en) | 2021-04-20 |
Family
ID=68413050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910725227.5A Active CN110425238B (en) | 2019-08-07 | 2019-08-07 | Brake clearance automatic adjusting arm for drum brake |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110425238B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046323A (en) * | 2021-09-30 | 2022-02-15 | 浙江万安科技股份有限公司 | Brake clearance automatic adjustment arm |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4380276A (en) * | 1980-07-21 | 1983-04-19 | Kelsey-Hayes Co. | Slack adjuster for vehicle brakes |
| US20100018812A1 (en) * | 2008-07-28 | 2010-01-28 | Bendix Spicer Foundation Brake Llc | Automatic Slack Adjuster Anchor Unit With A One-Way Clutch |
| CN102748415A (en) * | 2012-07-24 | 2012-10-24 | 四川柯世达汽车制动系统集团有限公司 | Worm gear type brake arm capable of automatically adjusting brake clearance |
| CN202746467U (en) * | 2012-09-13 | 2013-02-20 | 瑞立集团瑞安汽车零部件有限公司 | Automatic automobile brake gap adjusting arm, brake device and automobile |
| CN207080534U (en) * | 2017-08-15 | 2018-03-09 | 广东富华重工制造有限公司 | The adjustment arm of vehicle brake clearance |
-
2019
- 2019-08-07 CN CN201910725227.5A patent/CN110425238B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4380276A (en) * | 1980-07-21 | 1983-04-19 | Kelsey-Hayes Co. | Slack adjuster for vehicle brakes |
| US20100018812A1 (en) * | 2008-07-28 | 2010-01-28 | Bendix Spicer Foundation Brake Llc | Automatic Slack Adjuster Anchor Unit With A One-Way Clutch |
| CN102748415A (en) * | 2012-07-24 | 2012-10-24 | 四川柯世达汽车制动系统集团有限公司 | Worm gear type brake arm capable of automatically adjusting brake clearance |
| CN202746467U (en) * | 2012-09-13 | 2013-02-20 | 瑞立集团瑞安汽车零部件有限公司 | Automatic automobile brake gap adjusting arm, brake device and automobile |
| CN207080534U (en) * | 2017-08-15 | 2018-03-09 | 广东富华重工制造有限公司 | The adjustment arm of vehicle brake clearance |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046323A (en) * | 2021-09-30 | 2022-02-15 | 浙江万安科技股份有限公司 | Brake clearance automatic adjustment arm |
| CN114046323B (en) * | 2021-09-30 | 2023-07-28 | 浙江万安科技股份有限公司 | Automatic brake clearance adjusting arm |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110425238B (en) | 2021-04-20 |
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