CN103375517A - Worm shaft of automotive clearance adjusting arm - Google Patents
Worm shaft of automotive clearance adjusting arm Download PDFInfo
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- CN103375517A CN103375517A CN 201210124816 CN201210124816A CN103375517A CN 103375517 A CN103375517 A CN 103375517A CN 201210124816 CN201210124816 CN 201210124816 CN 201210124816 A CN201210124816 A CN 201210124816A CN 103375517 A CN103375517 A CN 103375517A
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- worm shaft
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Abstract
The invention discloses a worm shaft of an automotive clearance adjusting arm. The worm shaft comprises a shaft body; the top of the worm shaft is a hexagon-shaped head (1); the rear position of the hexagon-shaped head (1) is provided with equally multiple divided tooth shapes (2) with 6 to 24 parts; the equally multiple divided tooth shapes (2) are meshed with corresponding tooth-shaped grooves which are formed in a blocking plate. The worm shaft of the automotive clearance adjusting arm has the advantages of being simple in structure, convenient to install and easy to maintain, accurately adjusting break clearance during the automobile braking, completely solving the retreating generated during the automobile braking and being high in safety coefficient.
Description
Technical field
The invention belongs to automobile technical field, relate to the component of automotive adjusting arm the inside, particularly the worm shaft in a kind of automobile gap adjustment arm.
Background technique
The braking of automobile is to utilize the frictional force that produces when contacting between brake shoe and the brake drum to realize.Contact friction in the vehicle traveling process between brake shoe and the brake drum is very frequent, Brake shoe lining can wear and tear gradually like this, gap between brake shoe and the brake drum can become greatly gradually, causes braking moment to lose efficacy gradually, affects the safety in utilization of automobile braking system in the process of moving.In order to improve the Security of automobile, in existing automobile braking mechanism, often be provided with automatic adjusting arm or hand regulation arm.These adjust arms can be to compensating property of the brake clearance adjustment because increasing after wearing and tearing between brake shoe and the brake drum, thereby makes brake clearance between the two can remain on a constant value.
Adjust the problem of brake clearance low precision for all kinds of adjustment arms on the market, Chinese patent ZL 2,007 2 0111421.7 is a kind of improved automobile brake clearance manual adjusting arm, comprise housing, worm gear, worm screw and worm shaft, it is interior and intermeshing that worm gear and worm screw are located at housing, worm shaft and worm screw are connected, offer ten binary ball-and-sockets at worm shaft, offer porose in the relevant position of both sides up and down at housing, steel ball is packed in the corresponding ball-and-socket of worm shaft in the hole of both sides up and down by housing, reinstall spring at steel ball, then cover plate is connected on the housing with holddown spring with bolt.During automobile brake, by the spring force of spring compression steel ball, climb out to stop in the ball-and-socket of steel ball from the worm shaft.
Rotate above-mentioned worm shaft, when the active force that rotates during greater than the spring force of spring compression steel ball, can rotate with the worm screw that worm shaft is connected, worm screw can drive the worm gear that is meshed and rotate, worm gear can drive brake cam and rotate a small angle, brake cam rotates the gap that makes between the brake shoe drum and changes, and it is halved in worm shaft rotation one circle realization ten and regulates, thereby brake clearance is carried out the precision adjustment.
The adjustment precision of above-mentioned automobile hand regulation arm is significantly improved, but because the carrying capacity of automobile is increasing at present, demand braking force when causing braking is also increasing, the brake chamber of most of automobile is promoted to 30 inches present air chambers by 24 inches air chambers in past, braking pressure also is promoted to 1MPa by the 0.8MPa in past, domestic automobile produces the rollback phenomenon sometimes when particularly heavy-load automobile is braked at present, brake is weak when causing braking automobile, poor stop produces potential safety hazard.
Summary of the invention
The objective of the invention is: the potential safety hazard that produces sometimes the rollback phenomenon during for present domestic heavy-load automobile braking, worm shaft in a kind of automobile gap adjustment arm is proposed, to produce one of main parts size in the Locking Device of rollback phenomenon when thoroughly solving automobile brake, energy accurate adjustment brake clearance when automobile brake, and can solve rollback phenomenon when braking.
Purpose of the present invention realizes by following technical proposal: this worm shaft comprises axis body, it is characterized in that: the top of described worm shaft is the regular hexagon head, the rear position of regular hexagon head is the profile of tooth of five equilibrium more than 6 ~ 24, and many five equilibriums profile of tooth is meshed with corresponding serrate slot on the clamp.
Circular groove is opened in the rear position of many five equilibriums profile of tooth of described worm shaft, and the O RunddichtringO is placed in the circular groove.
Spline over the described worm shaft centre, its worm screw interior with transferring arm is meshed.
Described worm shaft tail end is opened the location cotter way of ring, and it is consistent with corresponding hole site on the accent arm housing, during assembling locating stud is penetrated in the location cotter way of ring by the hole on the accent arm housing.
During installation, worm shaft and worm screw are connected and stretch out housing, many five equilibriums profile of tooth of worm shaft is meshed with corresponding serrate slot on the clamp, and worm shaft can't rotate when clamp pinned worm shaft, behind the clamp moving position, the profile of tooth of its serrate slot and worm shaft head breaks away from engagement, come the adjustable brake gap by the rotary worm shaft head, after having regulated, clamp moving is returned original position, make the engagement of serrate slot and many five equilibriums profile of tooth, clamp again can be with the worm shaft locking.
Compared with prior art, the present invention has the following advantages:
1, the worm shaft head is stretched out outside, the serrate slot by head 6 ~ 24 minute profiles of tooth such as grade and clamp matches and limits the rotation of worm shaft head, and is simple in structure, easy for installation.
2, worm shaft is established the groove of mounting O-shaped seal ring, and corresponding hole drive fit on O RunddichtringO and the accent arm housing enters with impurity such as the water in the prevention ambient air, dusts after assembling, and reaches sealing effect.
3, worm shaft adopts spline to be meshed with worm gear, easily changes during damage, keeps in repair more convenient.
4, the worm shaft head has minute profiles of tooth such as 6 ~ 24, and it matches with clamp internal tooth form groove, can every circle when regulating carries out 6 ~ 24 grades and divides adjusting, and degree of regulation is higher.
5, the cooperation of the serrate slot of employing worm shaft head and clamp limits the rotation of worm shaft, this is restricted to mechanical type and cooperates, needing that in theory the worm shaft profile of tooth is twisted into two parts rear worm shaft just can rotate, can effectively solve like this problem that existing automobile worm shaft under large braking moment condition rotates (being rollback) voluntarily, Security is higher.
6, the worm shaft afterbody is opened the location cotter way of ring, it is consistent with corresponding hole site on the accent arm housing, during assembling with locating stud by transferring the hole on the arm housing to penetrate in the location cotter way of ring, worm shaft and is connected the arm housing connection can't be extracted worm shaft in the hole of accent arm housing.
Description of drawings
Fig. 1 is structural representation of the present invention.
Among the figure: 1 regular hexagon head, the profile of tooth of five equilibrium more than 2,3 grooves, 4 external spliness, 5 location cotter ways.
Embodiment
As shown in Figure 1, this worm shaft comprises axis body, it is characterized in that: the top of described worm shaft is regular hexagon head 1, and the rear position of regular hexagon head 1 is the profile of tooth of five equilibrium more than 6 ~ 24 2, and many five equilibriums profile of tooth 2 is meshed with corresponding serrate slot on the clamp.
Spline 4 over the described worm shaft centre, its worm screw interior with transferring arm is meshed.
Described worm shaft tail end is opened the location cotter way 5 of ring, and it is consistent with corresponding hole site on the accent arm housing, during assembling locating stud is penetrated in the location cotter way 5 of ring by the hole on the accent arm housing.
During installation, worm shaft and worm screw are connected and stretch out housing, many five equilibriums profile of tooth 2 of worm shaft is meshed with corresponding serrate slot on the clamp, and worm shaft can't rotate when clamp pinned worm shaft, behind the clamp moving position, the profile of tooth of its serrate slot and worm shaft head breaks away from engagement, come the adjustable brake gap by the rotary worm shaft head, after having regulated, clamp moving is returned original position, make the engagement of serrate slot and many five equilibriums profile of tooth, clamp again can be with the worm shaft locking.
Claims (4)
1. the worm shaft in the arm is adjusted in the automobile gap, this worm shaft comprises axis body, it is characterized in that: the top of described worm shaft is regular hexagon head (1), the rear position of regular hexagon head (1) is the profile of tooth of five equilibrium more than 6 ~ 24 (2), and many five equilibriums profile of tooth (2) is meshed with corresponding serrate slot on the clamp.
2. the worm shaft in the arm is adjusted in automobile according to claim 1 gap, it is characterized in that: circular groove (3) is opened in the rear position of many five equilibriums profile of tooth (2) of described worm shaft, and the O RunddichtringO is placed in the circular groove (3).
3. the worm shaft in the arm is adjusted in automobile according to claim 1 gap, it is characterized in that: spline (4) over the described worm shaft centre, its worm screw interior with transferring arm is meshed.
4. the worm shaft in the arm is adjusted in automobile according to claim 1 gap, it is characterized in that: described worm shaft tail end is opened the location cotter way (5) of ring, it is consistent with corresponding hole site on the accent arm housing, during assembling locating stud is penetrated in the location cotter way (5) of ring by the hole on the accent arm housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210124816 CN103375517A (en) | 2012-04-26 | 2012-04-26 | Worm shaft of automotive clearance adjusting arm |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210124816 CN103375517A (en) | 2012-04-26 | 2012-04-26 | Worm shaft of automotive clearance adjusting arm |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103375517A true CN103375517A (en) | 2013-10-30 |
Family
ID=49461134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210124816 Pending CN103375517A (en) | 2012-04-26 | 2012-04-26 | Worm shaft of automotive clearance adjusting arm |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103375517A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545991A (en) * | 2016-01-20 | 2016-05-04 | 中国重汽集团济南动力有限公司 | Sealing structure for brake shoe assembly |
| CN105840777A (en) * | 2016-04-29 | 2016-08-10 | 苏州鼎隆精密机械制造有限公司 | Multi-ring locating stepped worm shaft |
| CN105840778A (en) * | 2016-04-29 | 2016-08-10 | 苏州鼎隆精密机械制造有限公司 | Stepped worm shaft |
| CN105840779A (en) * | 2016-04-29 | 2016-08-10 | 苏州鼎隆精密机械制造有限公司 | Knurled stepped worm shaft |
-
2012
- 2012-04-26 CN CN 201210124816 patent/CN103375517A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105545991A (en) * | 2016-01-20 | 2016-05-04 | 中国重汽集团济南动力有限公司 | Sealing structure for brake shoe assembly |
| CN105840777A (en) * | 2016-04-29 | 2016-08-10 | 苏州鼎隆精密机械制造有限公司 | Multi-ring locating stepped worm shaft |
| CN105840778A (en) * | 2016-04-29 | 2016-08-10 | 苏州鼎隆精密机械制造有限公司 | Stepped worm shaft |
| CN105840779A (en) * | 2016-04-29 | 2016-08-10 | 苏州鼎隆精密机械制造有限公司 | Knurled stepped worm shaft |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131030 |