CN221170503U - Brake with overheat clearance self-adjusting protection function - Google Patents
Brake with overheat clearance self-adjusting protection function Download PDFInfo
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- CN221170503U CN221170503U CN202323458807.3U CN202323458807U CN221170503U CN 221170503 U CN221170503 U CN 221170503U CN 202323458807 U CN202323458807 U CN 202323458807U CN 221170503 U CN221170503 U CN 221170503U
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- 238000009434 installation Methods 0.000 claims description 3
- 230000007246 mechanism Effects 0.000 description 3
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
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- 239000002360 explosive Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
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Abstract
The application discloses a brake with overheat clearance self-adjusting protection function, which relates to the technical field of automobile brakes and comprises a brake drum, two brake shoes and a clearance self-adjusting assembly, wherein a brake cylinder is arranged between the two brake shoes, a friction lining is arranged on the side part of each brake shoe, a brake clearance is arranged between the friction lining and the inner side of the brake drum, the clearance self-adjusting assembly is arranged between movable ends of the two brake shoes in the brake drum and comprises a screw rod, and an adjusting ratchet wheel, a temperature control sheet and a first adjusting sleeve are sleeved outside a polished rod end of the screw rod in sequence and axially: by arranging the temperature control sheet, the distance between the first adjusting sleeve and the second adjusting sleeve can be automatically and passively adjusted according to the external temperature, so that the influence of heat expansion and cold contraction of the brake drum on the friction distance is eliminated; the adjusting ratchet wheel is driven to rotate, and under the clamping restriction of the first adjusting sleeve and the second adjusting sleeve and the brake shoe respectively, the screw sleeve can be pushed out axially from the screw rod, so that the active adjustment of the friction distance is realized.
Description
Technical Field
The application relates to the technical field of automobile brakes, in particular to a brake with an overheat clearance self-adjusting protection function.
Background
The drum brake is a common automobile brake device and is mainly used for vehicles with traditional structures such as small-sized light automobiles, commercial vehicles and the like. Unlike disc brake, the drum brake adopts cylindrical equipment inside the wheel and consists of several parts, including brake drum, brake shoe, brake spring, brake cylinder, etc. In a drum brake, when a driver depresses a brake pedal, the brake system is activated, causing brake fluid to flow into the brake cylinder through the brake pipe, thereby pushing the brake shoes in the brake drum to expand outwardly. At this time, the friction linings on the brake shoes contact the inner layer surface of the brake drum, the wheels are gradually decelerated or even stopped by friction force, and the brake shoes automatically retract when braking force disappears.
Most of liquid brake self-boosting structure brakes in the market are self-adjusting structures. When the brake is frequently braked under the severe working condition of long downhill, the brake is high in temperature, the whole brake drum is heated and expanded outwards, and then the gap between the inner side of the brake drum and the brake is enlarged, at the moment, the self-adjusting mechanism senses that the gap exceeds a set range, and self-adjusting is started; and when the temperature cools down the back brake drum and inwards contract, its and stopper clearance diminish, because self-regulating mechanism no longer moves this moment, and then there is the overshoot risk after the clearance diminishes, leads to friction disc abnormal wear, life greatly reduced even hauls the risk of rubbing the fire.
Disclosure of utility model
The device provides a brake with overheat clearance self-adjusting protection function, and the specific implementation mode is as follows:
a brake with overheat clearance self-adjusting protection function, comprising:
The brake comprises a brake drum and two brake shoes hinged in the brake drum, wherein a brake cylinder is arranged between the two brake shoes, a friction lining is arranged on the side part of the brake shoe, and a brake gap is arranged between the friction lining and the inner side of the brake drum;
The gap self-adjusting assembly is arranged between movable ends of two brake shoes in the brake drum and comprises a screw rod with one end provided with threads and the other end provided with a polished rod, the threaded end of the screw rod is connected with a screw sleeve, the end part of the screw sleeve is provided with a second adjusting sleeve, an adjusting ratchet wheel, a temperature control sheet and a first adjusting sleeve are sequentially axially sleeved outside the polished rod end of the screw sleeve, when the brake drum is subjected to external thermal expansion under the influence of the environment, the temperature control sheet correspondingly deforms according to the temperature to enable a brake gap to be unchanged, and when the brake drum is subjected to internal cold contraction under the influence of the environment, the temperature control sheet correspondingly deforms according to the temperature to reset to enable the brake gap to be unchanged.
By adopting the technical scheme, the air arm is contracted by the brake wheel cylinder during braking, so that the friction lining moves to one side of the braking gap, and the brake drum is braked; when the brake drum is operated for a long time, the initial braking gap is reduced due to thermal expansion of the brake drum, the temperature control sheet can deform according to the ambient temperature in order to eliminate the influence of the thermal expansion of the brake drum, the length of the gap self-adjusting assembly is reduced, and the brake shoe moves to one side of the gap self-adjusting assembly under the action of the reset spring, so that the braking gap is enlarged, and the influence of the external temperature on the initial braking gap is offset.
Preferably, the first adjusting sleeve and the second adjusting sleeve have the same structure, and the outer end parts of the first adjusting sleeve and the second adjusting sleeve are provided with U-shaped clamping grooves for limiting the limit positions of the movable ends of the brake shoes.
Preferably, a return spring is provided between the hinge point of the two brake shoes and the side of either brake shoe.
Through adopting above technical scheme, U-shaped draw-in groove peg graft in the loose end of brake shoe, and it cooperates with reset spring and can change the degree of opening and shutting of brake shoe, and then has changed the braking clearance between friction lining and the brake drum inboard.
Preferably, the temperature control sheet comprises two metal heat-sensitive sheets which are arranged in parallel, an installation gap is arranged between the two metal heat-sensitive sheets, the other ends of the two metal heat-sensitive sheets are combined into a whole through a metal heat-sensitive ring, and a circular through hole for a polish rod side in a screw rod to pass through is formed in the metal heat-sensitive sheet.
Preferably, the temperature control piece is in clearance fit with the adjusting ratchet wheel, and the aperture of the circular through hole is larger than the diameter of the polish rod side in the screw rod.
Preferably, the metal heat-sensitive sheet is provided with a clamping protrusion near the side of the first adjusting sleeve, one side of the first adjusting sleeve opposite to the U-shaped clamping groove is provided with a splicing groove, and the clamping protrusion is spliced in the splicing groove.
Preferably, the polish rod side of the screw rod is in axial sliding connection with the first adjusting sleeve, and relative rotation can occur between the polish rod side and the first adjusting sleeve.
In summary, the application has the following beneficial technical effects:
1. According to the utility model, the temperature control sheet is arranged, so that the distance between the first adjusting sleeve and the second adjusting sleeve can be automatically and passively adjusted according to the external temperature, and further the influence of thermal expansion and contraction of the brake drum on the friction distance is eliminated;
2. According to the utility model, the adjusting ratchet wheel is driven to rotate, and under the clamping restriction of the first adjusting sleeve and the second adjusting sleeve with the brake shoe respectively, the axial pushing out of the screw sleeve from the screw rod can be realized, so that the active adjustment of the friction distance is realized;
3. the utility model has simple structure, and realizes the position adjustment of the first adjusting sleeve on the screw rod end along the length direction of the screw rod end through the thermal deformation of the metal thermal sensitive sheet.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic view of the structure of the present utility model with the annular housing removed;
FIG. 3 is a schematic diagram of a mid-gap self-adjusting assembly of the present utility model;
FIG. 4 is a schematic view of the explosive structure of FIG. 3 in accordance with the present utility model;
fig. 5 is a schematic view of the assembly of the flip and hinge of the present utility model.
Reference numerals illustrate:
1. Brake drum, 2, brake shoe, 3, reset spring, 4, brake cylinder, 5, friction lining, 6, clearance self-adjusting component, 601, swivel nut, 602, adjustment ratchet, 603, temperature control piece, 604, first adjustment sleeve, 605, second adjustment sleeve, 606, screw rod, 6031, card protruding, 6032, metal heat-sensitive piece, 6033, circular through hole, 6034, metal heat-sensitive ring, 6041, U-shaped draw-in groove, 6042, spliced groove.
Detailed Description
The following describes specific embodiments of the utility model with reference to the drawings and examples:
It should be noted that the structures, proportions, sizes, etc. shown in the drawings are merely for the purpose of understanding and reading the disclosure, and are not intended to limit the scope of the utility model, which is defined by the appended claims.
Also, the terms such as "upper," "lower," "left," "right," "middle," and "a" and the like recited in the present specification are merely for descriptive purposes and are not intended to limit the scope of the utility model, but are intended to provide relative positional changes or modifications without materially altering the technical context in which the utility model may be practiced.
The application is described in further detail below with reference to fig. 1-5.
The embodiment of the application discloses a brake with an overheat clearance self-adjusting protection function.
Example 1
Referring to fig. 1 to 5, the present embodiment provides a brake with overheat clearance self-adjusting protection function, including a clearance self-adjusting component 6, a brake drum 1, two brake shoes 2 and a return spring 3 hinged in the brake drum 1, a brake cylinder 4 is arranged between the two brake shoes 2, a friction lining 5 is arranged at the side of the brake shoe 2, a brake clearance is arranged between the friction lining 5 and the inner side of the brake drum 1, the clearance self-adjusting component 6 is arranged between movable ends of the two brake shoes 2 in the brake drum 1, the brake comprises a screw 606 with one end provided with threads and the other end provided with a polished rod, the threaded end of the screw 606 is screwed with a screw sleeve 601, the end of the screw sleeve 601 is provided with a second adjusting sleeve 605, and the polished rod end of the screw sleeve is sequentially axially sleeved with an adjusting ratchet 602, a temperature controlling piece 603 and a first adjusting sleeve 604; when the temperature is increased by 50 ℃, the temperature control piece 603 expands by about 1mm, and the axial distance between the second adjusting sleeve 605 and the first adjusting sleeve 604 is increased by 1mm; when the brake drum 1 is contracted after cooling, the thickness of the temperature control sheet 603 is reduced, and the axial distance between the second adjusting sleeve 605 and the first adjusting sleeve 604 is shortened, so that the brake clearance is ensured to be constant at the set value.
Referring to fig. 1 to 4, the first adjusting sleeve 604 and the second adjusting sleeve 605 have the same structure, the outer ends of the two sleeves are provided with a U-shaped clamping groove 6041 for limiting the limit position of the movable end of the brake shoe 2, in the structure, the polish rod side of the screw 606 is axially and slidably connected with the inner side of the first adjusting sleeve 604, and a return spring 3 is arranged between the hinge point of the two brake shoes 2 and the side part of any brake shoe 2.
Referring to fig. 3 to 5, the temperature control sheet 603 includes two metal heat-sensitive sheets 6032 arranged in parallel, an installation gap is formed between the two metal heat-sensitive sheets 6032, the other ends of the two metal heat-sensitive sheets 6032 are integrated through a metal heat-sensitive ring 6034, a circular through hole 6033 for passing through the polish rod side of the screw 606 is formed in the metal heat-sensitive sheet 6032, the temperature control sheet 603 is in clearance fit with the adjusting ratchet 602, the aperture of the circular through hole 6033 is larger than the diameter of the polish rod side of the screw 606, and the temperature control sheet 603 in the structure adopts a thermal bimetal material FPA223-80, and the expansion force of the thermal bimetal FPA is larger than 50N.
Referring to fig. 5, a metal heat-sensitive sheet 6032 is provided with a clamping protrusion 6031 near the side of the first adjusting sleeve 604, a plugging groove 6042 is provided on the side of the first adjusting sleeve 604 opposite to the U-shaped clamping groove 6041, and the clamping protrusion 6031 is plugged in the plugging groove 6042, and the plugging groove 6042 and the clamping protrusion 6031 cooperate in the structure to play a role of supporting and fixing.
The active operation process of the clearance self-adjusting component 6 is as follows: an external gear drive mechanism rotates the adjustment ratchet 602 and the screw 606; under the cooperation of the second adjusting sleeve 605 and the brake shoe 2, the screw sleeve 601 does not follow the second adjusting sleeve to rotate, but moves axially relative to the screw 606, so that the distance between the second adjusting sleeve 605 and the first adjusting sleeve 604 is adjusted, and active adjustment of a brake clearance is realized.
Many other changes and modifications may be made without departing from the spirit and scope of the utility model. It is to be understood that the utility model is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (7)
1. The utility model provides a take overheated clearance self-modulation protect function's stopper, includes brake drum (1) and articulates locates two brake shoes (2) and reset spring (3) in brake drum (1), and two be equipped with brake cylinder (4) between brake shoe (2), the lateral part of brake shoe (2) is equipped with friction lining (5), just friction lining (5) with be equipped with the braking clearance between brake drum (1) inboard, its characterized in that still includes:
The gap self-adjusting assembly (6) is arranged between movable ends of two brake shoes (2) in the brake drum (1), the brake drum comprises a screw rod (606) with threads at one end and a polished rod at the other end, the threaded end of the screw rod is connected with a threaded sleeve (601), the end of the threaded sleeve (601) is provided with a second adjusting sleeve (605), the polished rod end of the threaded sleeve is sequentially axially sleeved with an adjusting ratchet wheel (602), a temperature control piece (603) and a first adjusting sleeve (604), when the brake drum (1) is subjected to external thermal expansion under the influence of the environment, the temperature control piece (603) is correspondingly deformed according to the temperature to enable a brake gap to be unchanged, and when the brake drum (1) is subjected to internal cold contraction under the influence of the environment, the temperature control piece (603) is correspondingly deformed and reset according to the temperature to enable the brake gap to be kept unchanged.
2. The brake with the overheat clearance self-adjusting protection function according to claim 1, wherein the first adjusting sleeve (604) and the second adjusting sleeve (605) have the same structure, and the outer end parts of the first adjusting sleeve and the second adjusting sleeve are provided with a U-shaped clamping groove (6041) for limiting the limit position of the movable end of the brake shoe (2).
3. A brake with self-adjusting overheat clearance protection according to claim 1, wherein a return spring (3) is provided between the hinge point of two of the brake shoes (2) and the side of either of the brake shoes (2).
4. The brake with the overheat clearance self-adjusting protection function according to claim 2, wherein the temperature control sheet (603) comprises two metal heat-sensitive sheets (6032) which are arranged in parallel, an installation clearance is arranged between the two metal heat-sensitive sheets (6032), the other ends of the two metal heat-sensitive sheets (6032) are integrated through a metal heat-sensitive ring (6034), and a circular through hole (6033) for a polish rod side in the screw rod (606) to pass through is arranged on the metal heat-sensitive sheets (6032).
5. The brake with the overheat clearance self-adjusting protection function according to claim 4, wherein the temperature control piece (603) is in clearance fit with the adjusting ratchet wheel (602), and the diameter of the circular through hole (6033) is larger than the diameter of the polish rod side in the screw rod (606).
6. The brake with the overheat clearance self-adjusting protection function according to claim 5, wherein the metal heat-sensitive sheet (6032) is provided with a clamping protrusion (6031) near the side of the first adjusting sleeve (604), one side of the first adjusting sleeve (604) opposite to the U-shaped clamping groove (6041) is provided with a plugging groove (6042), and the clamping protrusion (6031) is plugged in the plugging groove (6042).
7. The brake with self-adjusting protection of overheat clearance according to claim 1, wherein the polished rod side of the screw (606) is in an axial sliding connection with the first adjustment sleeve (604).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323458807.3U CN221170503U (en) | 2023-12-19 | 2023-12-19 | Brake with overheat clearance self-adjusting protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323458807.3U CN221170503U (en) | 2023-12-19 | 2023-12-19 | Brake with overheat clearance self-adjusting protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221170503U true CN221170503U (en) | 2024-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323458807.3U Active CN221170503U (en) | 2023-12-19 | 2023-12-19 | Brake with overheat clearance self-adjusting protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221170503U (en) |
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2023
- 2023-12-19 CN CN202323458807.3U patent/CN221170503U/en active Active
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