CN203130868U - Automatic compensation device for gaps between drum brake shoes and brake drum - Google Patents
Automatic compensation device for gaps between drum brake shoes and brake drum Download PDFInfo
- Publication number
- CN203130868U CN203130868U CN 201320264048 CN201320264048U CN203130868U CN 203130868 U CN203130868 U CN 203130868U CN 201320264048 CN201320264048 CN 201320264048 CN 201320264048 U CN201320264048 U CN 201320264048U CN 203130868 U CN203130868 U CN 203130868U
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- brake
- drum
- compensation device
- automatic compensation
- brake shoe
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Abstract
The utility model discloses an automatic compensation device for gaps between drum brake shoes and a brake drum. The automatic compensation device comprises a support plate which is connected with a pair of brake shoes I and II, wherein the support plate consists of a primary plate and secondary plate; a bayonet which is connected with the brake shoe I is arranged at one end of the primary plate and a flat hole is formed at the other end; a shaft is formed in the secondary plate and placed in the flat hole to form flexible connection between the primary plate and the secondary plate; a fan-shaped toothed plate I and a fan-shaped toothed plate II are respectively arranged on the primary plate and the secondary plate and meshed with each other to form a locking mechanism; a tension spring I is arranged on the shaft and connected with one side of the primary plate; a support arm which is embedded into the brake shoe II is arranged on the secondary plate; and a tension spring II which is used for laminating the primary plate and the brake shoe I is arranged at the end of the primary plate connected with the brake shoe I. The beneficial effects of the automatic compensation device can be known according to the narration; and the locking mechanism formed through the meshing of the fan-shaped toothed plates I and II on the primary and secondary plates is used with the shaft and the tension spring I to control the gaps between the brake shoes I and II and the brake drum, so that the structure is simple and the control is reliable.
Description
Technical field
The utility model relates to a kind of break, relates in particular to a kind of drum brake hoof piece and brake drum clearance automatic compensation device.
Background technique
The friction facing of drum brake in use can constantly wear and tear, and the gap between friction facing and the brake drum is constantly enlarged, and can increase the lag time of braking mechanism operation, influences the Security of vehicle drive.For the gap between friction facing and the brake drum is remained in the OK range, people have designed the compensation mechanism such as ratchet bolt mechanism or worm-and-wheel gear, these compensation mechanism structures are haggled over complexity, have increased cost and the maintenance difficulty of break.
The model utility content
The utility model is at the existing in prior technology deficiency, and a kind of simple in structure, control reliable drum brake hoof piece and brake drum clearance automatic compensation device are provided.
The technical solution of the utility model is: designed the adjustable length dunnage that connects and support brake shoe, when this mechanism implements braking at brake shoe, can adjust length automatically, the gap fast to brake shoe compensates.
Be specially, a kind of drum brake hoof piece and brake drum clearance automatic compensation device, comprise the dunnage that connects a pair of brake shoe one/two, described dunnage is made of mainboard and subplate, described mainboard one end is provided with the bayonet socket that is connected with described brake shoe one, the other end is provided with a flat hole, and described subplate is provided with one and places described flat hole to constitute the active connection of described master/subplate; Respectively be provided with a sector rack one/two locking framework of engagement formation relatively on described master/subplate; Described axle is provided with an extension spring one and is connected with described mainboard one side, and described subplate is provided with the support arm that embeds described brake shoe two;
An end that is connected with described brake shoe one on the described mainboard is provided with the extension spring two with itself and one pressing of described brake shoe.
Wherein, the elasticity coefficient of described extension spring two is greater than the elasticity coefficient of described extension spring one.
Described mainboard comprise body and be positioned at described body one end with the described body connecting plate of moulding that staggers, described flat hole is arranged on the described connecting plate;
Described sector rack one is positioned on the described body end that connects described connecting plate and its outer arc limit described body dorsad, and described bayonet socket is positioned at the other end of described body.
Side on the long limit in described flat hole and the described body between described bayonet socket and described sector rack one is parallel.
The outer arc limit of the described sector rack two on the described subplate is relative with the outer arc limit of described sector rack one, and described support arm is arranged on an outer arc limit side dorsad that is positioned at described sector rack two on the described subplate.
Described support arm is provided with the support side edge of the outer arcuate of described body dorsad.
Described support arm top is provided with stop hook.
The outer arc limit of described sector rack one/two is provided with equally distributed engaging tooth.
During the break braking, brake shoe one and brake shoe two open, and mainboard, subplate and extension spring one that extension spring two and support arm stretch and link together make axle move along flat hole, and sector rack one and sector rack two break away from; After sector rack one and sector rack two broke away from, support arm drove subplate and sways, and made support arm to the direction motion away from bayonet socket.When the friction facing on brake shoe one and the brake shoe two with after brake drum contacts, support arm and bayonet socket stop mutual motion.
When break stops to brake, brake shoe one and brake shoe two are drawn close, extension spring two and support arm stop the stretching to the mainboard that links together, subplate and extension spring one, extension spring is shunk in a flash and is made sector rack one and sector rack two engagements form locking, axle stops operating, mainboard and subplate stop mutual motion, the mutual alignment of bayonet socket and support side edge is fixed, withstood brake shoe one and brake shoe two continue draw close, make the friction facing on brake shoe one and the brake shoe two stop to enlarge with the gap of brake drum respectively.
Use along with break, friction facing is more and more thinner, but the mutual alignment when friction facing contacts with brake drum between bayonet socket and the support side edge is also more and more far away, and the mutual alignment between bayonet socket and the support side edge can be realized fixing in the moment that each brake shoe one and brake shoe two are drawn close, thereby reaches the compensation to the gap respectively and between the brake drum of the friction facing on brake shoe one and the brake shoe two.
The beneficial effect of this programme can be learnt according to the narration to such scheme, by on master/subplate by sector rack one/two relatively engagement constitute locking framework and axle, extension spring one are used control brake shoe one/two respectively and the gap between the brake drum, simple in structure, control is reliable.Mainboard adopts the main body of the moulding of staggering and the mechanism that connecting plate is formed, and is firm firm, easy to process.Extension spring one is set to be made gullet plate and cooperates the tooth geared speed faster; The elasticity coefficient of extension spring two and extension spring two is set greater than the elasticity coefficient of extension spring one, can prevents draw-in groove and brake shoe one disengaging.The support side edge of support arm is set to outer arcuate, the force-bearing situation when being beneficial to improve the support side edge pressurized.The support arm top is provided with stop hook can prevent the support arm brake shoe two that slips away.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment.
Fig. 2 is the plan view of Fig. 1.
Fig. 3 is the mounting point schematic representation of the utility model embodiment.
Among the figure, 1, dunnage; 2, subplate; 3, locking framework; 4, sector rack one; 5, sector rack two; 6, connecting plate; 7, flat hole; 8, axle; 9, bayonet socket; 10, brake shoe one; 11, extension spring two; 12, support arm; 13, brake shoe two; 14, support side edge; 15, stop hook; 16, extension spring one; 17, brake drum; 18, mainboard; 19, friction facing; 20, body.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by embodiment, this programme is set forth.
As Fig. 1,2, shown in 3, the utility model is a kind of drum brake hoof piece and brake drum clearance automatic compensation device, comprise the dunnage 1 that connects a pair of brake shoe 1 and brake shoe 2 13, dunnage 1 is made of mainboard 18 and subplate 2, mainboard 18 comprise body 20 and be positioned at body 20 1 ends with body 20 connecting plate 6 of moulding that staggers, be positioned at an end that connects connecting plate 6 on the body 20 and be provided with the outer arc limit sector rack 1 of body 20 dorsad, the outer arc limit of sector rack 1 is provided with equally distributed engaging tooth, body 20 the other ends are provided with the bayonet socket 9 that is connected with brake shoe 1, and an end that is connected with brake shoe 1 on the body 20 also is provided with the extension spring 2 11 with itself and brake shoe one 10 pressings; Connecting plate 6 is provided with flat hole 7, and the side on the long limit in flat hole 7 and the body 20 between bayonet socket 9 and sector rack 1 is parallel.
During the break braking, brake shoe 1 and brake shoe 2 13 open, brake shoe 1 and brake shoe 2 13 be by mainboard 18, subplate 2 and extension spring 1 that extension spring 2 11 and support arm 12 stretches and link together, and axle 8 is moved along flat hole 7, and sector rack 1 and sector rack 25 break away from; After sector rack 1 and sector rack 25 broke away from, support arm 12 drove subplate 2 and rotates around axle 8, made support arm 12 to the direction motion away from bayonet socket 9.When the friction facing 19 on brake shoe 1 and the brake shoe 2 13 with after brake drum contacts, support arm 12 and bayonet socket 9 stop mutual motion.
When break stops to brake, brake shoe 1 and brake shoe 2 13 are drawn close, extension spring 2 11 and support arm 12 stop the mainboard 18 to linking together, the stretching of subplate 2 and extension spring 1, extension spring one 16 moments contraction makes sector rack 1 and sector rack 25 engagements form locking, axle 8 stops operating, mainboard 18 and subplate 2 stop mutual motion, the mutual alignment of bayonet socket 9 and support side edge 14 is fixed, withstood brake shoe 1 and brake shoe 2 13 continue draw close, make the friction facing 19 on brake shoe 1 and the brake shoe 2 13 stop to enlarge with the gap of brake drum 17 respectively.
Use along with break, friction facing 19 is more and more thinner, but the mutual alignment when friction facing 19 contacts with brake drum between bayonet socket 9 and the support side edge 14 is also more and more far away, and the mutual alignment between bayonet socket 9 and the support side edge 14 can be realized fixing in the moment that each brake shoe 1 and brake shoe 2 13 are drawn close, thereby reaches the compensation to the gap respectively and between the brake drum 17 of the friction facing 19 on brake shoe 1 and the brake shoe 2 13.
The utility model can pass through or adopt existing techniques in realizing without the technical characteristics of describing; do not repeat them here; certainly; above-mentioned explanation is not to be to restriction of the present utility model; the utility model also is not limited in above-mentioned giving an example; the variation that those skilled in the art make in essential scope of the present utility model, remodeling, interpolation or replacement also should belong to protection domain of the present utility model.
Claims (10)
1. a drum brake hoof piece and brake drum clearance automatic compensation device, it is characterized in that, comprise the dunnage that connects a pair of brake shoe one/two, described dunnage is made of mainboard and subplate, described mainboard one end is provided with the bayonet socket that is connected with described brake shoe one, the other end is provided with a flat hole, and described subplate is provided with one and places described flat hole to constitute the active connection of described master/subplate; Respectively be provided with a sector rack one/two locking framework of engagement formation relatively on described master/subplate; Described axle is provided with an extension spring one and is connected with described mainboard one side, and described subplate is provided with the support arm that embeds described brake shoe two;
An end that is connected with described brake shoe one on the described mainboard is provided with the extension spring two with itself and one pressing of described brake shoe.
2. drum brake hoof piece according to claim 1 and brake drum clearance automatic compensation device is characterized in that the elasticity coefficient of described extension spring two is greater than the elasticity coefficient of described extension spring one.
3. drum brake hoof piece according to claim 1 and 2 and brake drum clearance automatic compensation device, it is characterized in that, described mainboard comprise body and be positioned at described body one end with the described body connecting plate of moulding that staggers, described flat hole is arranged on the described connecting plate;
Described sector rack one is positioned on the described body end that connects described connecting plate and its outer arc limit described body dorsad, and described bayonet socket is positioned at the other end of described body.
4. drum brake hoof piece according to claim 3 and brake drum clearance automatic compensation device is characterized in that, the side on the long limit in described flat hole and the described body between described bayonet socket and described sector rack one is parallel.
5. drum brake hoof piece according to claim 3 and brake drum clearance automatic compensation device, it is characterized in that, the outer arc limit of the described sector rack two on the described subplate is relative with the outer arc limit of described sector rack one, and described support arm is arranged on an outer arc limit side dorsad that is positioned at described sector rack two on the described subplate.
6. drum brake hoof piece according to claim 5 and brake drum clearance automatic compensation device is characterized in that, described support arm is provided with the support side edge of the outer arcuate of described body dorsad.
7. drum brake hoof piece according to claim 1 and 2 and brake drum clearance automatic compensation device is characterized in that, described support arm top is provided with stop hook.
8. drum brake hoof piece according to claim 5 and brake drum clearance automatic compensation device is characterized in that, described support arm top is provided with stop hook.
9. drum brake hoof piece according to claim 1 and 2 and brake drum clearance automatic compensation device is characterized in that, the outer arc limit of described sector rack one/two is provided with equally distributed engaging tooth.
10. drum brake hoof piece according to claim 5 and brake drum clearance automatic compensation device is characterized in that, the outer arc limit of described sector rack one/two is provided with equally distributed engaging tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264048 CN203130868U (en) | 2013-05-15 | 2013-05-15 | Automatic compensation device for gaps between drum brake shoes and brake drum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320264048 CN203130868U (en) | 2013-05-15 | 2013-05-15 | Automatic compensation device for gaps between drum brake shoes and brake drum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203130868U true CN203130868U (en) | 2013-08-14 |
Family
ID=48938848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320264048 Expired - Fee Related CN203130868U (en) | 2013-05-15 | 2013-05-15 | Automatic compensation device for gaps between drum brake shoes and brake drum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203130868U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588122A (en) * | 2016-07-06 | 2018-01-16 | 泰州市扬帆车件有限公司 | One kind automatically adjusts braking drum brake |
| CN113833787A (en) * | 2021-10-19 | 2021-12-24 | 山东永生机械有限公司 | Brake assembly |
-
2013
- 2013-05-15 CN CN 201320264048 patent/CN203130868U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107588122A (en) * | 2016-07-06 | 2018-01-16 | 泰州市扬帆车件有限公司 | One kind automatically adjusts braking drum brake |
| CN113833787A (en) * | 2021-10-19 | 2021-12-24 | 山东永生机械有限公司 | Brake assembly |
| CN113833787B (en) * | 2021-10-19 | 2024-01-30 | 山东永生机械有限公司 | Brake assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130814 Termination date: 20140515 |