CN114810878B - Exempt from to adjust self-compensating hub structure of stopping - Google Patents
Exempt from to adjust self-compensating hub structure of stoppingInfo
- Publication number
- CN114810878B CN114810878B CN202210449169.XA CN202210449169A CN114810878B CN 114810878 B CN114810878 B CN 114810878B CN 202210449169 A CN202210449169 A CN 202210449169A CN 114810878 B CN114810878 B CN 114810878B
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- CN
- China
- Prior art keywords
- pivot
- brake
- adjusting
- shaped
- cover plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
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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
- F16D65/14—Actuating mechanisms for brakes; Means for initiating operation at a predetermined position
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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
- F16D2121/00—Type of actuator operation force
- F16D2121/14—Mechanical
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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
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/20—Mechanical mechanisms converting rotation to linear movement or vice versa
- F16D2125/22—Mechanical mechanisms converting rotation to linear movement or vice versa acting transversely to the axis of rotation
- F16D2125/28—Cams; Levers with cams
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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
- F16D2125/00—Components of actuators
- F16D2125/18—Mechanical mechanisms
- F16D2125/58—Mechanical mechanisms transmitting linear movement
- F16D2125/68—Lever-link mechanisms, e.g. toggles with change of force ratio
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Braking Arrangements (AREA)
Abstract
The invention discloses an adjustment-free self-compensating hub brake structure which comprises a shell and brake shoes, wherein the inner side of the shell is provided with the brake shoes, one end of each brake shoe is provided with a pivot adjusting mechanism, the other end of each brake shoe is provided with a driving mechanism for driving the brake shoes to brake in an expanding mode, the pivot adjusting mechanism is movably connected with the driving mechanism through a connecting rod, the pivot adjusting mechanism is driven by the driving mechanism through the connecting rod to adjust the abrasion gap of the brake shoes, the pivot adjusting mechanism comprises a pivot shaft and an adjusting component, one end of the adjusting component is fixedly connected with the shell, the other end of the adjusting component is rotationally connected with the connecting rod, the pivot shafts are symmetrically arranged at two sides of the adjusting component and pivoted with the arc ends of the brake shoes, and the adjusting component adjusts the pivot shafts at two sides to move outwards by a distance for gap compensation.
Description
Technical Field
The invention relates to the field of braking brakes for bicycles and electric vehicles, in particular to an adjustment-free self-compensating hub braking structure.
Background
The bicycle and the electric vehicle are widely applied to daily life of people with convenient and quick travel, wherein the hub brake drives the cam shaft to rotate through rocker arm rotation, shoe block assemblies on two sides are driven to be expanded and tightly attached to the brake drum, and the friction force between the brake drum and the shoe block assemblies enables the wheels to stop rotating. The gap between the worn shoe block assembly and the hub is larger and larger after the shoe block assembly is used for a long time, at the moment, the phenomena of brake performance reduction and brake failure usually occur, and a user is often required to tighten a brake cable or replace the brake through manual adjustment, so that the brake is troublesome. The braking clearance is adjusted manually, so that timeliness and accuracy are difficult to ensure.
Therefore, those skilled in the art are continuously researched and studied, such as a brake device with the publication number of CN214356498U and a vehicle, and the scheme can adjust the wear gap of the brake piece, but when the brake is used for a period of time, the adjusting mechanism can generate the problems of clamping stagnation, asynchronous adjustment or incapability of adjusting, small adjusting range and the like.
The analysis results show that the ratchet wheel is arranged at one end of the adjusting screw and is matched with the poking claw arranged on the bottom surface of the matching part of the cam shaft to be adjusted, when the poking claw on the cam shaft rotates along with the cam shaft in the circumferential direction, an offset angle is generated between the poking claw and the ratchet wheel at the original position of being in parallel with the axial direction, the circumferential rotation angle of the poking claw along with the rotation of the cam shaft is increased due to the increase of the abrasion gap, the poking claw is not fully contacted with the ratchet wheel, the transmission reliability and the synchronism are poor, the clamping stagnation, the unilateral adjustment or the incapability of adjustment can occur in the adjustment process, the abrasion gap adjustment of the hoof block group is inconvenient in the later stage, and the drum brake in the prior art has the problems that after the friction material at the cam shaft wheel end is abraded, the far end is not fully abraded, the scrapped and the like.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a self-adjusting drum brake for an electric vehicle, which solves the problems that after a shoe block assembly of the existing brake is worn for a long time, a gap between the shoe block assembly and a wheel hub is enlarged, clamping stagnation can be generated in the later stage of adjusting a braking gap, adjustment is asynchronous or cannot be carried out, and friction materials at the far end of a protruding shaft are not sufficiently worn.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides an exempt from to adjust self-compensating hub structure of stopping, includes casing and brake shoe, the casing inboard is equipped with the brake shoe, brake shoe one end is equipped with pivot adjustment mechanism, and the other end is equipped with the actuating mechanism that drives brake shoe and rises to close the braking, pivot adjustment mechanism passes through connecting rod swing joint with actuating mechanism, pivot adjustment mechanism passes through the wearing and tearing clearance of connecting rod drive regulation brake shoe by actuating mechanism, pivot adjustment mechanism includes pivot axle and adjusting part, adjusting part one end and casing fixed connection, the other end and connecting rod rotate to be connected, pivot axle symmetry sets up at the both sides of adjusting part and the pin joint of brake shoe circular arc end, adjusting part adjusts both sides pivot axle and moves outside a distance and carry out the clearance benefit.
The driving mechanism comprises a cam shaft, a deflector rod and a rocker arm, wherein one end of the cam shaft is provided with a cam shaft body which is detachably connected with the rocker arm, the other end of the cam shaft is provided with a cam part which is in butt joint with a brake shoe, the deflector rod is fixedly connected with the top end of the cam part, and the deflector rod is provided with a pin shaft which is movably connected with one end of a connecting rod.
The adjusting assembly comprises a pivot fixing seat, a ratchet wheel, a shifting cover plate, an elastic piece and special-shaped adjusting rings, wherein the ratchet wheel is arranged in a hollow cavity on the upper portion of the pivot fixing seat, an opening is formed in the upper end of the hollow cavity, the shifting cover plate is arranged on the opening, a connecting pin shaft is arranged at the upper end of the shifting cover plate and is in rotary connection with a connecting rod, a shifting claw is arranged at the lower end of the shifting cover plate and is in butt joint with ratchets on the ratchet wheel, the elastic piece is arranged on the shifting cover plate to enable the shifting cover plate to keep in contact with the ratchet wheel, through holes are symmetrically formed in two sides of the hollow cavity, the special-shaped adjusting rings are arranged in the through holes, one end of each special-shaped adjusting ring is in threaded connection with the pivot shaft, and the other end of each special-shaped adjusting ring is detachably and fixedly connected with the ratchet wheel.
The further improvement is that a dustproof cover is arranged between the shifting cover plate and the ratchet wheel, a through hole structure is arranged on the dustproof cover, and the shifting claw passes through the through hole structure and is in butt joint with the ratchet wheel.
The ratchet wheel is further improved in that outer convex polygon structures are symmetrically arranged on two sides of the ratchet wheel, the outer convex polygon structures are connected with polygonal countersunk inner holes formed in one end of a special-shaped adjusting ring in an adaptive mode, threaded holes are formed in the other end of the special-shaped adjusting ring, an arc-shaped pivoting portion is arranged on a pivoting shaft and pivoted with the arc-shaped end of a brake shoe, flange blocking portions are arranged at two ends of the arc-shaped pivoting portion, and a threaded adjusting rod portion is arranged in the direction perpendicular to a shaft axis of the arc-shaped pivoting portion and is matched with the threaded holes.
The hinge is further improved in that the lower end of the hinge fixing seat is provided with a base fixedly connected with the shell, the elastic piece is provided with a fitting through hole, the fitting through hole is sleeved on the special-shaped adjusting ring and is attached to the hinge fixing seat, the outer side of the elastic piece is provided with an inward-folding claw which is clamped on the shifting cover plate and one side face of the hinge fixing seat, and the elastic piece is made of elastic materials.
The further improvement is that the opening at the upper end of the pivot fixing seat is arranged in a clamping structure with two opposite side surfaces higher than other side surfaces, and the dustproof cover and the shifting cover plate are embedded into the opening of the clamping structure.
The brake shoe is further improved in that elastic reset pieces are further arranged at two ends of the brake shoe, so that the brake shoe always has a reset trend, and the elastic reset pieces are arranged to be an extension reset spring and/or an O-shaped spring and/or a polygonal structure spring.
The novel brake cable assembly is further improved in that a cam shaft penetrating hole, a pivot fixing seat mounting groove, a lug structure and a frame fixing part are arranged in the shell, and a manual wear gap adjusting structure is formed by a brake cable penetrating structure arranged on the lug structure and a brake cable fixing structure arranged at the other end of the rocker arm.
The beneficial effects of the invention are as follows:
1. according to the application, the rocker arm of the driving mechanism drives the cam shaft to rotate, the brake shoe is driven to open an angle brake, and the connecting rod is driven to linearly drive the adjusting assembly to reciprocate back and forth; when the abrasion loss of the brake shoe is small, the adjusting component can only make linear reciprocating motion under the drive of the connecting rod, the pivot shaft is not adjusted, so that a reasonable braking fit clearance is kept between the brake shoe and the brake drum, and clamping stagnation is not generated due to the fact that the braking clearance is too small;
2. The pivot shafts are symmetrically arranged at two sides of the adjusting component and pivoted with the arc ends of the brake shoes, when the pivot shafts are adjusted to a certain degree, the brake shoes and the adjusting component can generate a small angle and automatically pivot to solve the problem of adjustment jamming, and the adjusting device is reasonable in structure and convenient and flexible to adjust;
3. Because the pivot adjusting mechanism is arranged at one end of the pivot, when the brake shoes at the end of the cam shaft are worn, the friction plates at the end of the pivot are continuously adjusted to participate in braking wear, so that the defect of incomplete wear at the end of the pivot of the drum brake is overcome, the brake shoes are fully utilized, and the service life of the brake is prolonged;
4. The adjusting component is provided with a ratchet wheel in the installation of a pivot fixing seat of the hollow cavity, a straight line-driven shifting cover plate is covered above the pivot fixing seat, a shifting claw is arranged below the shifting cover plate and is matched with the ratchet wheel to carry out gap adjustment, and an opening of an upper cover of the pivot fixing seat is arranged into a clamping structure, so that the back and forth movement of the shifting cover plate is provided with a guide limit, the transmission is stable and reliable;
5. The ratchet wheel rotates to drive the special-shaped adjusting rings on two sides to rotate simultaneously through the outer convex polygon, so that synchronous compensation of brake shoes on two sides is ensured;
6. the adjusting component is provided with a ratchet wheel in the installation of the pivot fixing seat of the hollow cavity, the upper part of the pivot fixing seat is covered with a straight line driving shifting cover plate, and a dust cover is additionally arranged between the two parts, so that foreign matters are effectively prevented from entering, and more reliable transmission is ensured.
Drawings
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is an exploded view of the assembly of the present invention.
Fig. 3 is a schematic perspective view of the drive mechanism and pivot adjustment mechanism of the present invention.
Fig. 4 is a schematic front view of the present invention.
FIG. 5 is a perspective view of the present invention in its overall detail.
Fig. 6 is a schematic cross-sectional view of the present invention.
FIG. 7 is a cross-sectional view of the pivot adjustment mechanism of the present invention.
Fig. 8 is a perspective exploded view of the pivot adjustment mechanism of the present invention.
FIG. 9 is a schematic view of a pivot mounting structure according to the present invention.
FIG. 10 is a schematic view of the ratchet mechanism of the present invention.
Fig. 11 is a schematic view of the structure of the shift cover plate of the present invention.
Fig. 12 is a schematic view of the structure of the special-shaped adjusting ring of the invention.
Fig. 13 is a schematic view of the pivot structure of the present invention.
The attached drawing shows that 10-shell, 11-camshaft penetrating hole, 12-pivot fixing seat mounting groove, 13-lug structure, 14-frame fixing part, 20-brake shoe, 30-camshaft, 32-camshaft body, 31-cam part, 33-deflector rod, 40-elastic resetting piece, 50-pivot adjusting mechanism, 51-pivot shaft, 511-arc pivot part, 512-flange blocking part, 513-screw thread adjusting rod part, 52-special-shaped adjusting ring, 521-polygonal countersunk head inner hole, 522-threaded hole, 53-deflector cover plate, 531-deflector claw, 532-connecting pin, 54-elastic piece, 541-fitting through hole, 542-inwardly folded claw, 55-dust cover, 551-through hole structure, 56-ratchet wheel, 561-ratchet wheel, 562-outer convex polygon structure, 57-pivot fixing seat, 571-base, 574-hollow cavity, 573-opening, 574-through hole, 60-connecting rod, 70-rocker arm, 71-brake wire fixing structure.
Detailed Description
In order to enhance the understanding of the present invention, the present invention will be described in further detail with reference to the drawings, and the present embodiment is only for explaining the present invention and is not limited to the protection scope of the present invention.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the indicated combinations or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The invention is described in further detail below with reference to the attached drawings and examples:
1-4 show an embodiment of an adjustment-free self-compensating hub brake structure, which comprises a shell 10 and a brake shoe 20, wherein the brake shoe 20 is arranged on the inner side of the shell 10, one end of the brake shoe 20 is provided with a pivot adjusting mechanism 50, the other end of the brake shoe 20 is provided with a driving mechanism for driving the brake shoe 20 to brake in an expanding way, the pivot adjusting mechanism 50 is movably connected with the driving mechanism through a connecting rod 60, and the pivot adjusting mechanism 50 is driven by the driving mechanism through the connecting rod 60 to adjust the abrasion gap of the brake shoe 20; the pivot adjusting mechanism 50 comprises a pivot shaft 51 and an adjusting component, wherein one end of the adjusting component is fixedly connected with the shell 10, the other end of the adjusting component is rotationally connected with the connecting rod 60, the pivot shaft 51 is symmetrically arranged at two sides of the adjusting component and pivoted with the circular arc ends of the brake shoes 20, the adjusting component adjusts the outer moving distance of the pivot shafts 51 at two sides to perform clearance compensation, the driving mechanism comprises a cam shaft 31, a deflector rod 33 and a rocker arm 70, one end of the cam shaft 30 is provided with the cam shaft 32 which is detachably connected with the rocker arm 70, the other end of the cam shaft 30 is provided with the cam part 31 which is abutted with the brake shoes 20, the top end of the cam part (32) is fixedly connected with the deflector rod 33, the deflector rod 33 is provided with a pin shaft which is movably connected with one end of the connecting rod 60, when the rocker arm drives the cam shaft to expand and open an angle brake, drives the connecting rod to linearly drive the adjusting component to reciprocate back and forth, when the brake shoes are very small in abrasion amount, the adjusting component can only reciprocate linearly under the driving of the connecting rod, the pivot shaft is not adjusted, so that a reasonable brake fit clearance is kept between the brake shoes and the brake drum, the brake shoes are braked to reach a abrasion amount, the adjusting component adjusts the pivot shaft which is matched with the brake shoes to move outwards, thereby pushing the arc-shaped end of the brake shoe to outwards adjust a distance to compensate the abrasion gap; the adjusting component is arranged at one end of the pivot, and after the brake shoes at the end of the cam shaft are worn, friction plates at the end of the pivot are continuously adjusted to participate in braking wear, so that the defect of incomplete wear at the end of the pivot of the drum brake is overcome, the brake shoes are fully utilized, and the service life of the brake is prolonged.
More preferably, elastic reset pieces 40 are arranged at two ends of the brake shoe 20, so that the brake shoe 20 always has a reset trend, the elastic reset pieces 40 are arranged as tension reset springs and/or O-shaped springs and/or polygonal structure springs, the O-shaped springs can also be arranged as polygonal structure springs, namely, two reset springs are arranged at two ends of the shoe block group, one end is a reset spring, one end is an O-shaped spring, one end is a reset spring, one end is a polygonal structure spring, one O-shaped spring is independently used, one polygonal structure spring is independently used, the reset force required by the type is selected according to the application, and a reset torsion spring is further arranged on the rocker arm, so that the reset is reliable.
More preferably, as shown in fig. 5-12, the adjusting assembly comprises a pivot fixing seat 57, a ratchet 56, a shifting cover plate 53, an elastic piece 54 and a special-shaped adjusting ring 52, a base 571 is arranged at the lower end of the pivot fixing seat 57 and fixedly connected with the shell 10, the pivot fixing seat 57 can be integrally formed as an insert when the shell 10 is manufactured, the pivot fixing seat 57 and the shell 10 can also be manufactured into a split type, wherein the base 571 is made into an anti-rotation polygon or spline structure and is matched with the shell 10, the ratchet 56 is arranged in a hollow cavity 572 at the upper part of the pivot fixing seat 57, an opening 573 is arranged at the upper end of the hollow cavity 572, a dust cover 55, the shifting cover plate 53 and the elastic piece 54 are arranged on the opening 573 in turn, a connecting pin 532 is arranged at the upper end of the shifting cover plate 53 and is in turn connected with a connecting rod 60, a pawl 531 is arranged at the lower end of the pawl 531 and penetrates through a through hole structure 551 arranged on the dust cover 55, the elastic piece 54 is sprung on the upper end face of the shifting cover plate 53, the pawl 531 is kept in contact with the ratchet 561, the outer polygonal structure is matched with the ratchet 10, the special-shaped polygonal structure is arranged in a hollow cavity 572, the hollow cavity is symmetrically connected with the hollow cavity 574, two sides of the hollow cavity 574 are symmetrically arranged with the hollow cavity 574, two sides of the special-shaped cavity is in a threaded cavity 574 is symmetrically connected with the hollow cavity 574, two sides of the hollow cavity is provided with the hollow cavity shaped cavity is provided with a threaded cavity 574, and is provided with a threaded cavity shaped, and is provided with a threaded cavity shaped; the structure is firm and stable, the abrasion rotation angle of the end of the cam shaft can be accurately and effectively converted into the relative movement distance between the shifting cover plate and the ratchet wheel, the brake shoe reaches an abrasion amount, the movement distance is increased to the point that the shifting claw skips over one tooth of the ratchet wheel, the special-shaped adjusting ring adjusts the pivot shaft which is matched with the special-shaped adjusting ring in a threaded manner to move outwards for a distance, so that the arc-shaped end of the brake shoe is pushed to adjust outwards for a distance to carry out abrasion gap compensation, the ratchet wheel rotates to drive the special-shaped adjusting rings on two sides to rotate simultaneously through the outer convex polygon, synchronous compensation of the brake shoes on two sides is ensured, the direct-shifting cover plate is covered above the pivot fixing seat, and the dust cover is arranged between the direct-shifting cover plate and the pivot fixing seat, so that the structure is firm and stable, more reliable transmission is ensured, and foreign matters are effectively prevented from entering.
More preferably, as shown in fig. 8, the elastic member 54 is provided with a fitting through hole 541, the fitting through hole 541 is sleeved on the special-shaped adjusting ring 52 and is attached to the pivot fixing seat 57, the outer side of the elastic member 54 is provided with an inward folding claw 542 which is clamped on the shift cover plate 53 and one side surface of the pivot fixing seat 57, and the elastic member 54 is made of an elastic material. The setting can effectively ensure that the shifting cover plate moves and is matched with the ratchet reliably.
More preferably, as shown in fig. 13, the pivot shaft 51 is provided with an arc-shaped pivot portion 511 pivoted to the arc-shaped end of the brake shoe, two ends of the arc-shaped pivot portion 511 are provided with flange blocking portions 512, and a threaded adjusting rod portion 513 is arranged in the vertical direction of one side shaft of the arc-shaped pivot portion 511 and is matched with the threaded hole 522. Preferably, the pivoting portion 511 is provided in a semicircular arc structure, and a screw adjusting lever portion is provided at one side of the plane. The screw thread adjusting gap is convenient and reliable, can ensure that the screw thread adjusting gap is fully effective in contact with the arc-shaped end of the brake shoe, is not easy to slip, can automatically pivot to convert and solve a pivoting angle, cannot generate an adjusting clamping stagnation phenomenon, and is reasonable in structure and convenient and flexible to adjust.
In a more preferred embodiment 2, as shown in fig. 9, the opening 573 at the upper end of the pivot fixing base 57 is provided with a locking structure having two opposite sides provided with through holes higher than the sides of the shift cover plate 53 in the moving direction, and the dust cover 55 and the shift cover plate 53 are embedded in the opening of the locking structure. Other structures were the same as in example 1. The setting makes the round trip movement of shifting block apron have the direction spacing, and the steady reliable motion.
More preferably, the housing 10 is provided with a cam shaft penetrating hole 11, a pivot fixing seat mounting groove 12, a lug structure 13 and a frame fixing part 14, and the lug structure 13 is provided with a brake wire penetrating structure and a brake wire fixing structure 71 arranged at the other end of the rocker arm 70 to form a manual wear gap adjusting structure.
The operation principle of the invention is as follows:
when the hub brakes, the rocker arm 70 is pulled by the brake line to drive the cam shaft 30 to rotate, and the cam shaft 30 drives the brake shoe 20 to expand around the pivot adjusting mechanism 51, so that the brake shoe 20 contacts with the vehicle brake hub to generate friction force to slow down the vehicle, and a braking effect is achieved.
When the cam shaft 30 rotates, the shift lever 33 is driven to rotate simultaneously, the shift lever 33 rotates to drive the connecting rod 60 to move, the connecting rod 60 drives the shift cover plate 53 to do linear reciprocating motion in the hollow cavity 572 of the pivot fixing seat 57, when the hub brake is used for a period of time, the rotating angle of the cam shaft 30 is gradually increased along with the increasing of abrasion of the brake shoes, the reciprocating motion distance of the shift claw 531 on the shift cover plate 53 is continuously increased, when the moving distance of the shift claw 531 is increased to the position beyond the next tooth of the ratchet wheel 56, the shift claw 531 hooks the ratchet teeth of the ratchet wheel 56 to move backwards to drive the ratchet wheel 56 to rotate one tooth, the ratchet wheel 56 rotates to drive the two side special-shaped adjusting rings 52 to move to the two sides through the threaded adjusting rod 513 of the built-in threaded hole driving the pivot shaft 51 to move to the two sides for a distance, and the gap generated by abrasion of the brake shoes 20 is compensated.
Therefore, after the hub brake is used for a period of time, a user is required to manually adjust the brake, and the brake automatically compensates through the adjusting mechanism arranged at the pivot end, so that the brake shoe at the pivot end is continuously involved in braking abrasion, and the service life of the hub brake is greatly prolonged.
The embodiments of the present invention are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present invention.
Claims (7)
1. An adjustment-free self-compensating hub brake structure comprises a shell (10) and a brake shoe (20), wherein the brake shoe (20) is arranged on the inner side of the shell (10), and the brake hub brake structure is characterized in that a pivot adjusting mechanism (50) is arranged at one end of the brake shoe (20), a driving mechanism for driving the brake shoe (20) to brake in a swelling mode is arranged at the other end of the brake shoe, the pivot adjusting mechanism (50) is movably connected with the driving mechanism through a connecting rod (60), and the pivot adjusting mechanism (50) is driven by the driving mechanism through the connecting rod (60) to adjust the abrasion gap of the brake shoe (20);
the pivot adjusting mechanism (50) comprises a pivot shaft (51) and an adjusting component, one end of the adjusting component is fixedly connected with the shell (10), the other end of the adjusting component is rotationally connected with the connecting rod (60), the pivot shaft (51) is symmetrically arranged at two sides of the adjusting component and pivoted with the arc end of the brake shoe (20), and the adjusting component adjusts the pivot shafts (51) at two sides to move outwards by a distance for gap compensation;
the driving mechanism comprises a cam shaft (30), a deflector rod (33) and a rocker arm (70), wherein one end of the cam shaft (30) is provided with a cam shaft body (32) which is detachably connected with the rocker arm (70), the other end of the cam shaft is provided with a cam part (31) which is abutted against the brake shoe (20), the deflector rod (33) is fixedly connected to the top end of the cam part (31), and the deflector rod (33) is provided with a pin shaft which is movably connected with one end of the connecting rod (60);
The adjusting component comprises a pivot fixing seat (57), a ratchet wheel (56), a shifting cover plate (53), an elastic piece (54) and a special-shaped adjusting ring (52), wherein the ratchet wheel (56) is arranged in a hollow cavity (572) on the upper portion of the pivot fixing seat (57), an opening (573) is formed in the upper end of the hollow cavity (572), the shifting cover plate (53) is arranged on the opening (573), a connecting pin shaft (532) is arranged at the upper end of the shifting cover plate (53) and is rotationally connected with a connecting rod (60), a shifting claw (531) is arranged at the lower end of the shifting cover plate and is abutted against a ratchet wheel (561) on the ratchet wheel (56), the elastic piece (54) is arranged on the shifting cover plate (53) to enable the shifting cover plate (53) to keep in contact with the ratchet wheel (56), through holes (574) are symmetrically formed in two sides of the hollow cavity (572), the special-shaped adjusting ring (52) are arranged in the through holes (574), one end of the special-shaped adjusting ring (52) is in threaded connection with the pivot shaft (51), and the other end of the special-shaped adjusting ring (52) is detachably connected with the ratchet wheel (56).
2. The adjustment-free self-compensating hub brake structure of claim 1, wherein a dust cover (55) is further arranged between the shifting cover plate (53) and the ratchet wheel (56), a through hole structure (551) is arranged on the dust cover (55), and the shifting claw (531) passes through the through hole structure (551) to be abutted with the ratchet wheel (561).
3. The self-compensating hub brake structure of claim 1, wherein the ratchet wheel (56) is symmetrically provided with an outer convex polygon structure (562), the outer convex polygon structure (562) is connected with a polygonal countersunk inner hole (521) arranged at one end of a special-shaped adjusting ring (52) in an adapting mode, a threaded hole (522) is formed in the other end of the special-shaped adjusting ring (52), an arc-shaped pivoting part (511) is arranged on the pivoting shaft (51) and pivoted with the arc-shaped end of a brake shoe, flange blocking parts (512) are arranged at two ends of the arc-shaped pivoting part (511), and a thread adjusting rod part (513) is arranged in the vertical direction of an axis on one side of the arc-shaped pivoting part (511) and is matched with the threaded hole (522).
4. The self-compensating hub brake structure of claim 1, wherein a base (571) is arranged at the lower end of the pivot fixing seat (57) and fixedly connected with the shell (10), the elastic piece (54) is provided with a fitting through hole (541), the fitting through hole (541) is sleeved on the special-shaped adjusting ring (52) and is attached to the pivot fixing seat (57), an inward-folding claw (542) is arranged at the outer side of the elastic piece (54) and is clamped on the shifting cover plate (53) and one side face of the pivot fixing seat (57), and the elastic piece (54) is made of elastic materials.
5. The self-compensating hub brake structure of claim 2, wherein the opening (573) at the upper end of the pivot fixing seat (57) is arranged as a clamping structure with opposite sides higher than other sides, and the dust cover (55) and the shift cover plate (53) are embedded in the openings of the clamping structures.
6. The self-compensating hub brake structure of any of claims 1-5, wherein elastic return members (40) are further arranged at two ends of the brake shoe (20) to enable the brake shoe (20) to always have a return trend, and the elastic return members (40) are arranged to be an extension return spring and/or an O-shaped spring and/or a polygonal structure spring.
7. The self-compensating hub brake structure of claim 6, wherein a camshaft mounting hole (11), a pivot fixing seat mounting groove (12), a lug structure (13) and a frame fixing part (14) are arranged in the shell (10), and a manual wear gap adjusting structure is formed by the brake wire mounting structure and a brake wire fixing structure (71) arranged at the other end of the rocker arm (70) on the lug structure (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210449169.XA CN114810878B (en) | 2022-04-27 | 2022-04-27 | Exempt from to adjust self-compensating hub structure of stopping |
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| CN202210449169.XA CN114810878B (en) | 2022-04-27 | 2022-04-27 | Exempt from to adjust self-compensating hub structure of stopping |
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| CN114810878A CN114810878A (en) | 2022-07-29 |
| CN114810878B true CN114810878B (en) | 2025-08-12 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB441430A (en) * | 1935-01-09 | 1936-01-20 | Alfred Wilson Mold | Improvements in or relating to brake adjusting devices |
| CN2319622Y (en) * | 1997-11-26 | 1999-05-19 | 山东巨力股份有限公司 | Wholly floating self-centring brake |
| CN217814685U (en) * | 2022-04-27 | 2022-11-15 | 唐泽制动器(天津)有限公司 | Adjustment-free self-compensation hub brake structure |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1329622A (en) * | 1962-03-23 | 1963-06-14 | Brake training | |
| GB1095043A (en) * | 1964-04-06 | 1967-12-13 | Girling Ltd | Improvements relating to internal shoe drum brakes |
| GB1370775A (en) * | 1970-10-02 | 1974-10-16 | Girling Ltd | Brake shoe reaction device for an internal shoe drum brake |
| US4356897A (en) * | 1978-12-29 | 1982-11-02 | Eaton Corporation | Wear indicator for disc brakes |
| ITTO20120097A1 (en) * | 2012-02-07 | 2013-08-08 | Daico Automotive Products S P A | AUTOMATIC ADJUSTMENT DEVICE FOR A GAME FOR A DRUM BRAKE |
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2022
- 2022-04-27 CN CN202210449169.XA patent/CN114810878B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB441430A (en) * | 1935-01-09 | 1936-01-20 | Alfred Wilson Mold | Improvements in or relating to brake adjusting devices |
| CN2319622Y (en) * | 1997-11-26 | 1999-05-19 | 山东巨力股份有限公司 | Wholly floating self-centring brake |
| CN217814685U (en) * | 2022-04-27 | 2022-11-15 | 唐泽制动器(天津)有限公司 | Adjustment-free self-compensation hub brake structure |
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|---|---|
| CN114810878A (en) | 2022-07-29 |
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