WO2010051678A1 - An improving structure of drum brake - Google Patents

An improving structure of drum brake Download PDF

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Publication number
WO2010051678A1
WO2010051678A1 PCT/CN2009/000506 CN2009000506W WO2010051678A1 WO 2010051678 A1 WO2010051678 A1 WO 2010051678A1 CN 2009000506 W CN2009000506 W CN 2009000506W WO 2010051678 A1 WO2010051678 A1 WO 2010051678A1
Authority
WO
WIPO (PCT)
Prior art keywords
brake
shoes
improved structure
base plate
drum
Prior art date
Application number
PCT/CN2009/000506
Other languages
French (fr)
Chinese (zh)
Inventor
杨群英
Original Assignee
Yang Qunying
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yang Qunying filed Critical Yang Qunying
Publication of WO2010051678A1 publication Critical patent/WO2010051678A1/en

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Classifications

    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D51/16—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis
    • F16D51/18—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes
    • F16D51/20—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like shaped as brake-shoes pivoted on a fixed or nearly-fixed axis with two brake-shoes extending in opposite directions from their pivots
    • 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
    • F16D51/00—Brakes with outwardly-movable braking members co-operating with the inner surface of a drum or the like
    • F16D2051/001—Parts or details of drum brakes
    • F16D2051/003—Brake supports
    • 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
    • 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
    • F16D2125/30—Cams; Levers with cams acting on two or more cam followers, e.g. S-cams

Definitions

  • the present invention relates to a drum brake, and in particular to an improved structure of a drum brake.
  • the traditional drum brake is mainly composed of brake base plate, brake drum, brake shoe, wheel cylinder or camshaft, return spring, positioning pin and other components.
  • the brake base plate is mounted on a fixed position of the axle such as: front and rear axle housings, which are fixed and fixed, with brake shoes, wheel cylinders, return springs, positioning pins, and the rotational torque when braking.
  • Each brake drum has a pair of brake shoes, and the brake shoes are provided with friction plates.
  • the brake drum is mounted on the hub wheel's rotating shaft (the output half shaft of the bridge) and is a part that rotates with the wheel. It is made of a certain amount of cast iron and is shaped like a drum. When braking, the wheel piston or the cam shaft rotates to push the roller end of the brake shoe to extend outward, pressing the outer brake drum, and the inner wall of the brake drum rubs against the friction plate, gradually decelerating the vehicle, forcing the wheel to stop rotating.
  • the drum brake of the above structure is symmetrically disposed on the left and right brake shoes on the brake base plate, and the mounting hole axially connected to the brake base plate is circular, and the cam shaft rotates to push the brake shoe to the mounting hole thereof.
  • the center of the brake shoe extends outward. Therefore, the front end of the brake shoe first contacts the brake drum and rubs against the brake drum. After the friction plate of the front end of the brake shoe is worn out, the brake shoe is positioned.
  • the back end is only a small part of the friction, the friction is different, but the friction plate has to be replaced; this causes a great waste to the user, so that the friction surface of the conventional drum brake is uneven;
  • the end of the brake iron of the drum brake is limited to swing.
  • An object of the present invention is to solve the above drawbacks and to provide an improved structure of a drum brake It has uniform friction surface, prolongs the service life of friction plates and brakes, provides more reliable braking, higher braking efficiency, improves driving safety and makes driving more comfortable.
  • the improved structure of the drum brake includes a brake base plate, left and right brake shoes symmetrically disposed on the brake base plate, and one end connection hole of the left and right brake shoes and a clamp end shaft corresponding to the brake base plate To the connection, the other end of the left and right brake shoes is a free end, and a camshaft passes through the convex through hole at the other end of the brake base plate and contacts the roller of the free end of the left and right brake shoes, and is located at the left and right brake shoes.
  • One end of the roller is provided with a certain gap, and the connecting hole of the left and right brake shoe and the connecting hole of the brake plate clamping portion form an independent guiding groove, and the outer side of the connecting hole of the left and right brake shoes
  • the department is equipped with matching reset shrapnel.
  • the gap is formed by matching the left and right brake shoe connecting holes or the connecting plate hole of the brake bottom plate with a certain arc gap formed on the outer side of the connecting hole, and the guiding groove has an elliptical cross section.
  • the guiding groove is 8° - 16° from the center of the brake base plate.
  • the guiding groove may also be embedded with a corresponding sleeve, and the sleeve is closely matched with the guiding groove.
  • the sleeve is made of an alloy material, and the alloy material is a low alloy steel.
  • An oil groove is also formed in the sleeve, and the oil groove and the sleeve are arranged at 45 degrees.
  • the sleeve has a thickness of 2 to 5 mm.
  • One end of the left and right brake shoe connecting holes is further provided with a spring buckle shaft, and a return spring is fastened to the spring buckle shaft and is tightly closed to the left and right brake shoes.
  • the reset dome has a "W" cross section.
  • the guiding groove is provided with a connecting shaft, and a groove is formed around the outer circumference of the connecting shaft, a locking piece is disposed between the two connecting shafts, and a through hole is further formed on the locking piece, the thickness of the locking piece and the IHJ groove width of the connecting shaft Matching, locking piece The side is inserted into the groove of the connecting shaft, and the side of the locking piece is provided with a side bevel.
  • the drum brake of the improved structure of the present invention, the brake bottom plate, the left and right brake shoes symmetrically disposed on the brake bottom plate, and the one end of the left and right brake shoes are connected to the end of the brake base plate.
  • the connecting portion is axially connected, and the other ends of the left and right brake shoes are free ends, and a cam shaft passes through the convex through hole at the other end of the brake base plate and contacts the rollers of the free ends of the left and right brake shoes, and is located at the left and right.
  • One end of the roller of the brake shoe is provided with a return spring, and the connecting holes of the left and right brake shoes and the connecting through hole of the brake plate clamping portion are respectively cut with a certain gap, and the left and right brake shoes are connected.
  • the connecting through hole of the hole and the brake bottom plate clamping portion constitutes an independent guiding groove, and matching end elastic pieces are provided at the outer end portions of the connecting holes of the left and right brake shoes.
  • the transverse direction of the guiding groove is elliptical, and the connecting shaft is inserted through the elliptical guiding groove of the brake base plate and the elliptical elliptical guiding groove of the brake shoe, and the outer side of the brake shoe is provided with a friction plate.
  • the camshaft rotates to push the brake shoe to extend outward from the elliptical guide groove of the brake base plate and the brake shoe itself, so that the extended front end of the brake shoe first contacts the brake drum, and brakes
  • the drum friction after which the brake shoe pushes the pressure, and the brake shoe moves along the rear end of the guide groove, so that the rear end of the brake shoe is in friction with the brake drum, and at this time, the brake shoe iron is fully deployed.
  • the middle part of the friction plate is rubbed against the brake drum; the friction surface is uniform, the friction plate is integrally rubbed, the braking effect is good, and the friction plate loss is relatively slow, thereby prolonging the service life of the friction plate and the brake.
  • the structure of the drum brake is improved, the brake shoe iron is fully deployed, the friction plate of the brake shoe is in full contact with the brake drum, the friction surface is uniform, the contact is large, and the brake is reliable, thereby improving Driving safety, in addition, the brake is stable, avoiding brake noise, brake return lag, insufficient braking force, brake "chattering” and “locking” phenomenon, and effectively reducing the "running" and "tail” of the vehicle "Phenomenon, the brakes of the vehicle are more comfortable, smooth and faster, which greatly improves the comfort of driving and riding.
  • Figure 2 is a partial enlarged cross-sectional view of Figure 1
  • Figure 3 is a schematic view of the structure of the sleeve
  • Figure 4 is a cross-sectional view of the bushing of Figure 3.
  • Figure 5 is a structural explosion diagram of the present novel
  • Figure 6 is a schematic view of the structure of the connecting shaft
  • Figure 7 is a schematic view of the structure of the lock piece
  • the improved structure of the drum brake includes a brake base plate 1, left and right brake shoes 2 symmetrically disposed on the brake base plate 1, and one ends of the left and right brake shoes 2
  • the hole is connected to the corresponding one end of the brake base plate 1 in the axial direction, and the other ends of the left and right brake shoes 2 are free ends, and a cam shaft 9 passes through the convex through hole of the other end of the brake base plate 1 and the left side,
  • the roller of the free end of the right brake shoe is in contact with the return spring 4 at the end of the roller of the left and right brake shoes, and the connecting hole of the connecting hole of the left and right brake shoe 2 and the clamping portion of the brake base plate 1
  • a certain gap 701 is cut, and the connecting holes of the left and right brake shoes 2 and the connecting portion of the brake base plate 1 constitute an independent guiding groove 7, and the connecting holes of the left and right brake shoes 2
  • the outer end is provided with a matching reset spring 8 .
  • the gap 701 is a connecting hole for engaging the left and right brake shoe 2 or the connecting hole of the brake base plate 1 is formed with a circular arc gap 701 to form a guiding groove 7.
  • the guiding groove 7 is ellipsoidal in cross section. Round.
  • the guiding groove 7 is 8° to 16° from the center of the brake base plate 1.
  • the guiding groove 7 can also be embedded with a corresponding sleeve 3, and the sleeve 3 is tightly fitted with the guiding groove 7.
  • the sleeve 3 is made of an alloy material, and the alloy material is a low alloy steel.
  • An oil groove 301 is also formed in the sleeve 3, and the oil groove and the sleeve 3 are arranged at 45 degrees.
  • the sleeve 3 has a thickness of 2 to 5 mm.
  • One end of the left and right brake shoe 2 connecting holes is further provided with a spring buckle shaft, and a return spring 4 is fastened to the spring buckle shaft and is tightly closed to the left and right brake shoes 2.
  • the reset dome 8 has a "W" cross section.
  • a connecting shaft 5 is disposed in the guiding groove 7.
  • a groove 501 is defined around the outer circumference of the connecting shaft 5.
  • a locking piece 6 is disposed between the connecting shafts 5.
  • the locking piece 6 is further provided with a through hole 601.
  • the thickness of 6 is matched with the width of the groove 501 of the connecting shaft 5, and the side of the locking piece 6 is inserted into the groove 501 of the connecting shaft 5, and the side of the locking piece 6 is provided with a side oblique side 602.
  • the brake drum is rubbed against the brake drum, and then the brake shoe pushes the pressure, and the brake shoe moves along the rear end of the guide groove, so that the rear end of the brake shoe is in friction with the brake drum.
  • the moving iron is fully deployed, and the middle of the friction plate is rubbed against the brake drum; thus the friction surfaces are hooked, gradually decelerating the vehicle, forcing the wheel to stop rotating.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Braking Arrangements (AREA)

Abstract

An improving structure of drum brake is disclosed. The drum brake comprises a back-plate; left and right brake shoes disposed on the back-plate symmetrically. Left and right brake shoes are connected axially with a clip portion of the back-plate at the ends with connecting holes, and the other ends of the shoes are free ends. A camshaft passes through a through hole in the protruding portion of the back-plate at the opposing end to the clip portion and contacts with rollers on the free ends of left and right shoes. A restoring spring is mounted at one end adjacent to the rollers of left and right shoes. The connecting holes in left and right brake shoes and through holes in the clip portion of the back-plate are respectively provided with certain clearance by cutting. The connecting holes in left and right brake shoes and the through holes in the clip portion of the back-plate constitute separate guiding slots. A restoring elastic piece is installed at the outside ends of the connecting holes in left and right shoes.

Description

鼓式制动器的改良结构 技术领域  Improved structure of drum brakes
本发明涉及一种鼓式制动器， 具体属于鼓式制动器的改良结构。  The present invention relates to a drum brake, and in particular to an improved structure of a drum brake.
背景技术 Background technique
传统的鼓式制动器主要由制动底板、 制动鼓、 制动蹄铁、 轮缸或凸轮轴、 回位弹簧、 定位销等零部件组成。 制动底板安装在车轴的固定位置上如： 前后 桥壳， 它是固定不动的， 上面装有制动蹄铁、 轮缸、 复位弹簧、 定位销， 承受 制动时的旋转扭力。 每一个制动鼓有一对制动蹄铁， 制动蹄铁上镶嵌有摩擦片。 制动鼓则是安装在轮毂车轮旋转轴 （桥的输出半轴） 上， 是随车轮一起旋转的 部件， 它是由一定份量的铸铁做成， 形状似圓鼓状。 当制动时， 轮虹活塞或凸 轮轴转动推动制动蹄铁的滚轮端向外伸展， 压迫外侧制动鼓， 制动鼓的内壁与 摩擦片摩擦， 逐步使车辆减速， 迫使车轮停止转动。  The traditional drum brake is mainly composed of brake base plate, brake drum, brake shoe, wheel cylinder or camshaft, return spring, positioning pin and other components. The brake base plate is mounted on a fixed position of the axle such as: front and rear axle housings, which are fixed and fixed, with brake shoes, wheel cylinders, return springs, positioning pins, and the rotational torque when braking. Each brake drum has a pair of brake shoes, and the brake shoes are provided with friction plates. The brake drum is mounted on the hub wheel's rotating shaft (the output half shaft of the bridge) and is a part that rotates with the wheel. It is made of a certain amount of cast iron and is shaped like a drum. When braking, the wheel piston or the cam shaft rotates to push the roller end of the brake shoe to extend outward, pressing the outer brake drum, and the inner wall of the brake drum rubs against the friction plate, gradually decelerating the vehicle, forcing the wheel to stop rotating.
上述结构的鼓式制动器， 对称设置在制动底板上的左、 右制动蹄铁， 其与 制动底板轴向连接的安装孔是圆形， 凸轮轴转动推动制动蹄铁以其安装孔为圆 心向外伸展， 因此， 制动蹄铁的伸展前端会先接触制动鼓， 与制动鼓摩擦， 待 制动蹄铁伸展前端的摩擦片摩损大部分后， 制动蹄铁的定位后端只是摩损很小 一部分， 摩擦不一， 但， 摩擦片也要更换了； 这样给用户造成很大的浪费， 从 而看出传统的鼓式制动器制动的摩擦面不均匀； 再有， 此鼓式制动器的制动跌 铁一端被限定摆动， 用户突然急刹车时， 制动蹄铁一端强制压迫制动鼓， 会出 现 "颤振" 和 "抱死" 等现象， 制动不可靠， 使行车不安全， 乘坐不舒适。 发明内容  The drum brake of the above structure is symmetrically disposed on the left and right brake shoes on the brake base plate, and the mounting hole axially connected to the brake base plate is circular, and the cam shaft rotates to push the brake shoe to the mounting hole thereof. The center of the brake shoe extends outward. Therefore, the front end of the brake shoe first contacts the brake drum and rubs against the brake drum. After the friction plate of the front end of the brake shoe is worn out, the brake shoe is positioned. The back end is only a small part of the friction, the friction is different, but the friction plate has to be replaced; this causes a great waste to the user, so that the friction surface of the conventional drum brake is uneven; The end of the brake iron of the drum brake is limited to swing. When the user suddenly brakes suddenly, the brake shoe is forced to press the brake drum at one end, and the phenomenon of "chattering" and "locking" may occur, and the braking is unreliable. Make driving unsafe and uncomfortable to ride. Summary of the invention
本发明的目的在于解决上述缺陷， 而提供一种改良结构的鼓式制动器， 其 具有摩擦面均匀， 延长摩擦片和制动器的使用寿命， 制动更可靠， 制动效能更 高， 提高行车安全， 驾乘车更舒适。 SUMMARY OF THE INVENTION An object of the present invention is to solve the above drawbacks and to provide an improved structure of a drum brake It has uniform friction surface, prolongs the service life of friction plates and brakes, provides more reliable braking, higher braking efficiency, improves driving safety and makes driving more comfortable.
为实现上述目的：  To achieve the above objectives:
鼓式制动器的改良结构， 包括制动底板、 对称设置在制动底板上的左、 右 制动蹄铁， 左、 右制动蹄铁的一端连接孔与制动底板对应的一端夹接部轴向连 接， 左、 右制动蹄铁另一端为自由端， 一凸轮轴穿过制动底板另一端的凸部通 孔与左、 右制动蹄自由端的滚轮接触， 位于左、 右制动蹄的滚轮一端设置有复 一定的间隙， 左、 右制动蹄铁的连接孔与制动底板夹接部的连接通孔构成独立 的导向槽， 在左、 右制动蹄铁的连接孔外侧端部设有相匹配的复位弹片。  The improved structure of the drum brake includes a brake base plate, left and right brake shoes symmetrically disposed on the brake base plate, and one end connection hole of the left and right brake shoes and a clamp end shaft corresponding to the brake base plate To the connection, the other end of the left and right brake shoes is a free end, and a camshaft passes through the convex through hole at the other end of the brake base plate and contacts the roller of the free end of the left and right brake shoes, and is located at the left and right brake shoes. One end of the roller is provided with a certain gap, and the connecting hole of the left and right brake shoe and the connecting hole of the brake plate clamping portion form an independent guiding groove, and the outer side of the connecting hole of the left and right brake shoes The department is equipped with matching reset shrapnel.
所述间隙是配合左、 右制动蹄铁的连接孔或制动底板夹接部的连接通孔圆 外侧削有一定圆弧间隙构成导向槽， 导向槽横切面呈椭圓形。  The gap is formed by matching the left and right brake shoe connecting holes or the connecting plate hole of the brake bottom plate with a certain arc gap formed on the outer side of the connecting hole, and the guiding groove has an elliptical cross section.
所述导向槽与制动底板的圆心呈 8° - 16° 。  The guiding groove is 8° - 16° from the center of the brake base plate.
所述导向槽上还可镶嵌套有相对应的轴套， 轴套与导向槽紧密配合。  The guiding groove may also be embedded with a corresponding sleeve, and the sleeve is closely matched with the guiding groove.
所述轴套为合金材料制成， 合金材料为低合金钢。'  The sleeve is made of an alloy material, and the alloy material is a low alloy steel. '
所述轴套内还开有一道油槽， 油槽与轴套呈 45度设置。  An oil groove is also formed in the sleeve, and the oil groove and the sleeve are arranged at 45 degrees.
所述轴套的厚度为 2 ~ 5 mm。  The sleeve has a thickness of 2 to 5 mm.
所述左、 右制动蹄铁连接孔的一端还设有弹簧扣轴， 一复位弹簧扣于弹簧扣 轴上， 并紧收于左、 右制动蹄铁。  One end of the left and right brake shoe connecting holes is further provided with a spring buckle shaft, and a return spring is fastened to the spring buckle shaft and is tightly closed to the left and right brake shoes.
所述复位弹片的横截面呈 "W" 状。  The reset dome has a "W" cross section.
所述导向槽内设有连接轴， 绕连接轴的外周开有凹槽， 一锁片设置在两连 接轴之间， 锁片上还开有通孔， 锁片的厚度与连接轴的 IHJ槽宽度相匹配， 锁片 侧边插于连接轴的凹槽内，所述锁片侧边设有侧斜边。 The guiding groove is provided with a connecting shaft, and a groove is formed around the outer circumference of the connecting shaft, a locking piece is disposed between the two connecting shafts, and a through hole is further formed on the locking piece, the thickness of the locking piece and the IHJ groove width of the connecting shaft Matching, locking piece The side is inserted into the groove of the connecting shaft, and the side of the locking piece is provided with a side bevel.
本发明的有益效果：  The beneficial effects of the invention:
1、本发明改良结构的鼓式制动器， 制动底板、对称设置在制动底板上的左、 右制动蹄铁， 左、 右制动蹄铁的一端连接孔与制动底板对应的一端夹接部轴向 连接， 左、 右制动蹄铁另一端为自由端， 一凸轮轴穿过制动底板另一端的凸部 通孔与左、 右制动蹄自由端的滚轮接触， 位于左、 右制动蹄的滚轮一端设置有 复位弹簧， 所述左、 右制动蹄铁的连接孔与制动底板夹接部的连接通孔分别削 有一定的间隙， 左、 右制动蹄铁的连接孔与制动底板夹接部的连接通孔构成独 立的导向槽， 在左、 右制动蹄铁的连接孔外侧端部设有相匹配的复位弹片。 导 向槽横切面呈橢圓形， 连接轴穿插在制动底板椭圓形的导向槽与制动蹄铁椭圓 形的导向槽上使其连接， 制动蹄铁外侧装有摩擦片。 所述凸轮轴转动推动制动 蹄铁以制动底板和制动蹄铁本身的椭圆形导向槽为圓心向外伸展， 因此， 制动 蹄铁的伸展前端会先接触制动鼓， 与制动鼓摩擦， 其后制动蹄铁使压力推动， 制动蹄铁的沿导向槽后端移动， 使制动蹄铁后端与制动鼓接触摩擦， 此时， 制 动蹄铁被完全展开， 跟着摩擦片的中部与制动鼓摩擦； 这样摩擦面均匀， 摩擦 片整体摩擦， 使制动效果好， 摩擦片损耗相对慢， 从而延长摩擦片和制动器的 使用寿命。  1. The drum brake of the improved structure of the present invention, the brake bottom plate, the left and right brake shoes symmetrically disposed on the brake bottom plate, and the one end of the left and right brake shoes are connected to the end of the brake base plate. The connecting portion is axially connected, and the other ends of the left and right brake shoes are free ends, and a cam shaft passes through the convex through hole at the other end of the brake base plate and contacts the rollers of the free ends of the left and right brake shoes, and is located at the left and right. One end of the roller of the brake shoe is provided with a return spring, and the connecting holes of the left and right brake shoes and the connecting through hole of the brake plate clamping portion are respectively cut with a certain gap, and the left and right brake shoes are connected. The connecting through hole of the hole and the brake bottom plate clamping portion constitutes an independent guiding groove, and matching end elastic pieces are provided at the outer end portions of the connecting holes of the left and right brake shoes. The transverse direction of the guiding groove is elliptical, and the connecting shaft is inserted through the elliptical guiding groove of the brake base plate and the elliptical elliptical guiding groove of the brake shoe, and the outer side of the brake shoe is provided with a friction plate. The camshaft rotates to push the brake shoe to extend outward from the elliptical guide groove of the brake base plate and the brake shoe itself, so that the extended front end of the brake shoe first contacts the brake drum, and brakes The drum friction, after which the brake shoe pushes the pressure, and the brake shoe moves along the rear end of the guide groove, so that the rear end of the brake shoe is in friction with the brake drum, and at this time, the brake shoe iron is fully deployed. The middle part of the friction plate is rubbed against the brake drum; the friction surface is uniform, the friction plate is integrally rubbed, the braking effect is good, and the friction plate loss is relatively slow, thereby prolonging the service life of the friction plate and the brake.
2、 根据本发明改良鼓式制动器的结构， 使制动蹄铁被完全展开， 制动蹄铁 的摩擦片与制动鼓全面接触， 使摩擦面均匀， 接触大， 从而制动可靠， 提高使 行车安全， 再有， 制动稳定， 避免了制动噪音、 制动器回位滞后、 制动力不足、 刹车 "颤振" 和 "抱死" 现象， 并有效减少车辆的 "跑偏" 和 "摆尾" 现象， 车辆制动更舒适平稳更迅速， 大大提高了驾、 乘车辆的舒适性。  2. According to the invention, the structure of the drum brake is improved, the brake shoe iron is fully deployed, the friction plate of the brake shoe is in full contact with the brake drum, the friction surface is uniform, the contact is large, and the brake is reliable, thereby improving Driving safety, in addition, the brake is stable, avoiding brake noise, brake return lag, insufficient braking force, brake "chattering" and "locking" phenomenon, and effectively reducing the "running" and "tail" of the vehicle "Phenomenon, the brakes of the vehicle are more comfortable, smooth and faster, which greatly improves the comfort of driving and riding.
附图说明 图 1是本发明的结构示意图 DRAWINGS Figure 1 is a schematic view of the structure of the present invention
图 2是图 1的局部放大剖视图  Figure 2 is a partial enlarged cross-sectional view of Figure 1
图 3是轴套的结构示意图  Figure 3 is a schematic view of the structure of the sleeve
图 4是图 3轴套的剖视图  Figure 4 is a cross-sectional view of the bushing of Figure 3.
图 5是本实新型的结构爆炸图  Figure 5 is a structural explosion diagram of the present novel
图 6是连接轴的结构示意图  Figure 6 is a schematic view of the structure of the connecting shaft
图 7是锁片的结构示意图  Figure 7 is a schematic view of the structure of the lock piece
具体实施方式 detailed description
如图 1至 7所示： 鼓式制动器的改良结构， 包括制动底板 1、 对称设置在制 动底板 1上的左、 右制动蹄铁 2， 左、 右制动蹄铁 2的一端连接孔与制动底板 1 对应的一端夹接部轴向连接， 左、 右制动蹄铁 2 另一端为自由端， 一凸轮轴 9 穿过制动底板 1另一端的凸部通孔与左、 右制动蹄自由端的滚轮接触， 位于左、 右制动蹄的滚轮一端设置有复位弹簧 4, 所述左、 右制动蹄铁 2的连接孔与制动 底板 1夹接部的连接通孔分别削有一定的间隙 701， 左、右制动蹄铁 2的连接孔 与制动底板 1夹接部的连接通孔构成独立的导向槽 7， 在左、右制动蹄铁 2的连 接孔外侧端部设有相匹配的复位弹片 8。  As shown in Figures 1 to 7, the improved structure of the drum brake includes a brake base plate 1, left and right brake shoes 2 symmetrically disposed on the brake base plate 1, and one ends of the left and right brake shoes 2 The hole is connected to the corresponding one end of the brake base plate 1 in the axial direction, and the other ends of the left and right brake shoes 2 are free ends, and a cam shaft 9 passes through the convex through hole of the other end of the brake base plate 1 and the left side, The roller of the free end of the right brake shoe is in contact with the return spring 4 at the end of the roller of the left and right brake shoes, and the connecting hole of the connecting hole of the left and right brake shoe 2 and the clamping portion of the brake base plate 1 A certain gap 701 is cut, and the connecting holes of the left and right brake shoes 2 and the connecting portion of the brake base plate 1 constitute an independent guiding groove 7, and the connecting holes of the left and right brake shoes 2 The outer end is provided with a matching reset spring 8 .
所述间隙 701是配合左、 右制动蹄铁 2的连接孔或制动底板 1夹接部的连接 通孔圓外侧削有一定圓弧间隙 701构成导向槽 7, 导向槽 7横切面呈椭圓形。  The gap 701 is a connecting hole for engaging the left and right brake shoe 2 or the connecting hole of the brake base plate 1 is formed with a circular arc gap 701 to form a guiding groove 7. The guiding groove 7 is ellipsoidal in cross section. Round.
所述导向槽 7与制动底板 1的圆心呈 8° ~ 16° 。  The guiding groove 7 is 8° to 16° from the center of the brake base plate 1.
所述导向槽 7上还可镶嵌套有相对应的轴套 3 ,轴套 3与导向槽 7紧密配合。 所述轴套 3为合金材料制成， 合金材料为低合金钢。  The guiding groove 7 can also be embedded with a corresponding sleeve 3, and the sleeve 3 is tightly fitted with the guiding groove 7. The sleeve 3 is made of an alloy material, and the alloy material is a low alloy steel.
所述轴套 3内还开有一道油槽 301， 油槽与轴套 3呈 45度设置。  An oil groove 301 is also formed in the sleeve 3, and the oil groove and the sleeve 3 are arranged at 45 degrees.
所述轴套 3的厚度为 2 ~ 5 mm。 所述左、 右制动蹄铁 2连接孔的一端还设有弹簧扣轴， 一复位弹簧 4扣于弹 簧扣轴上， 并紧收于左、 右制动蹄铁 2。 The sleeve 3 has a thickness of 2 to 5 mm. One end of the left and right brake shoe 2 connecting holes is further provided with a spring buckle shaft, and a return spring 4 is fastened to the spring buckle shaft and is tightly closed to the left and right brake shoes 2.
所述复位弹片 8的横截面呈 "W" 状。  The reset dome 8 has a "W" cross section.
所述导向槽 7内设有连接轴 5， 绕连接轴 5的外周开有凹槽 501， 一锁片 6 设置在两连接轴 5之间， 锁片 6上还开有通孔 601， 锁片 6的厚度与连接轴 5的 凹槽 501宽度相匹配， 锁片 6侧边插于连接轴 5的凹槽 501 内，所述锁片 6侧边 设有侧斜边 602。 工作原理： 踩动制动器， 所述凸轮轴转动推动制动蹄铁以制动底板和制动蹄 铁本身的橢圓形导向槽为圓心向外伸展， 因此， 制动蹄铁的伸展前端会先接触 制动鼓， 与制动鼓摩擦， 其后制动蹄铁使压力推动， 制动蹄铁的沿导向槽后端 移动， 使制动蹄铁后端与制动鼓接触摩擦， 此时， 制动蹄铁被完全展开， 跟着 摩擦片的中部与制动鼓摩擦； 这样摩擦面均勾， 逐步使车辆减速， 迫使车轮停 止转动。  A connecting shaft 5 is disposed in the guiding groove 7. A groove 501 is defined around the outer circumference of the connecting shaft 5. A locking piece 6 is disposed between the connecting shafts 5. The locking piece 6 is further provided with a through hole 601. The thickness of 6 is matched with the width of the groove 501 of the connecting shaft 5, and the side of the locking piece 6 is inserted into the groove 501 of the connecting shaft 5, and the side of the locking piece 6 is provided with a side oblique side 602. Working principle: When the brake is actuated, the camshaft rotates to push the brake shoe to extend outward from the elliptical guide groove of the brake base plate and the brake shoe itself. Therefore, the extended front end of the brake shoe will contact first. The brake drum is rubbed against the brake drum, and then the brake shoe pushes the pressure, and the brake shoe moves along the rear end of the guide groove, so that the rear end of the brake shoe is in friction with the brake drum. The moving iron is fully deployed, and the middle of the friction plate is rubbed against the brake drum; thus the friction surfaces are hooked, gradually decelerating the vehicle, forcing the wheel to stop rotating.

Claims

权 利 要 求 书 Claim
1. 鼓式制动器的改良结构， 包括制动底板 (1)、 对称设置在制动底板 (1)上的 左、 右制动蹄铁 (2)， 左、 右制动蹄铁 (2)的一端连接孔与制动底板 (1)对应的一端 夹接部轴向连接， 左、 右制动蹄铁 (2)另一端为自由端， 一凸轮轴 (9)穿过制动底 板 (1)另一端的凸部通孔与左、 右制动蹄自由端的滚轮接触， 位于左、 右制动蹄 的滚轮一端设置有复位弹簧 (4), 其特征是， 所述左、 右制动蹄铁 (2)的连接孔与 制动底板 (1)夹接部的连接通孔分别削有一定的间隙 (701)， 左、 右制动蹄铁 (2)的 连接孔与制动底板 (1)夹接部的连接通孔构成独立的导向槽 (7)， 在左、 右制动蹄 铁 (2)的连接孔外侧端部设有相匹配的复位弹片（8)。 1. Improved structure of the drum brake, including brake base plate (1), left and right brake shoes (2) symmetrically placed on the brake base plate (1), left and right brake shoes (2) One end connecting hole is axially connected to one end of the brake base plate (1), and the other ends of the left and right brake shoes (2) are free ends, and a cam shaft (9) passes through the brake base plate (1) The convex through hole at the other end is in contact with the roller at the free end of the left and right brake shoes, and the return spring (4) is disposed at one end of the roller of the left and right brake shoes, characterized in that the left and right brake shoes are (2) The connection hole and the connection hole of the clamping portion of the brake base plate (1) are respectively cut with a certain gap (701), the connection holes of the left and right brake shoes (2) and the brake plate (1) The connecting through hole of the clamping portion constitutes an independent guiding groove (7), and matching end elastic pieces (8) are provided at the outer end portions of the connecting holes of the left and right brake shoes (2).
2.根据权利要求 1 所述鼓式制动器的改良结构， 其特征是， 所述间隙 (701) 是配合左、 右制动蹄铁 (2)的连接孔或制动底板 (1 )夹接部的连接通孔圓外侧削有 一定圆弧间隙 (701)构成导向槽 (7), 导向槽 (7)横切面呈椭圓形。  2. The improved structure of the drum brake according to claim 1, wherein the gap (701) is a connecting hole for the left and right brake shoes (2) or a clamping portion of the brake base plate (1). The outer side of the connecting through-hole is cut with a certain arc gap (701) to form a guiding groove (7), and the guiding groove (7) has an elliptical cross section.
3.根据权利要求 1 所述鼓式制动器的改良结构， 其特征是， 所述导向槽 (7) 与制动底板 (1)的圆心呈 8° . ~ 16° 。  The improved structure of the drum brake according to claim 1, characterized in that the guide groove (7) and the center of the brake base plate (1) are 8° to 16°.
4.根据权利要求 1 所述鼓式制动器的改良结构， 其特征是， 所述导向槽 (7) 上还可镶嵌套有相对应的轴套 (3), 轴套 (3)与导向槽 (7)紧密配合。  The improved structure of the drum brake according to claim 1, characterized in that: the guiding groove (7) can be embedded with a corresponding sleeve (3), a sleeve (3) and a guiding groove ( 7) Close cooperation.
, ,
5.根据权利要求 4所述鼓式制动器的改良结构，其特征是，所述轴套 (3)为合 金材料制成， 合金材料为低合金钢。 The improved structure of the drum brake according to claim 4, characterized in that the sleeve (3) is made of an alloy material and the alloy material is a low alloy steel.
6.根据权利要求 4所述鼓式制动器的改良结构，其特征是，所述轴套 (3)内还 开有一道油槽 (301), 油槽与轴套 (3)呈 45度设置。  The improved structure of the drum brake according to claim 4, characterized in that the sleeve (3) further has an oil groove (301), and the oil groove and the sleeve (3) are arranged at 45 degrees.
7.根据权利要求 4所述鼓式制动器的改良结构，其特征是，所述轴套 (3)的厚 度为 2 ~ 5 mm。  The improved structure of the drum brake according to claim 4, characterized in that the sleeve (3) has a thickness of 2 to 5 mm.
8.根据权利要求 1所述鼓式制动器的改良结构， 其特征是， 所述左、 右制动 权 利 要 求 书 8. The improved structure of a drum brake according to claim 1, wherein said left and right brakes Claim
蹄铁 (2)连接孔的一端还设有弹簧扣轴， 一复位弹簧 (4)扣于弹簧扣轴上， 并紧收 于左、 右制动蹄铁 (2)。 The sole (2) has a spring-loaded shaft at one end of the connecting hole, and a return spring (4) is fastened to the spring-loaded shaft and is tightly closed to the left and right brake shoes (2).
9.根据权利要求 1所述鼓式制动器的改良结构，其特征是，所述复位弹片（8) 的横截面呈 "W" 状。  9. The improved structure of the drum brake according to claim 1, wherein the reset elastic piece (8) has a "W" cross section.
10.根据权利要求 1所述鼓式制动器的改良结构， 其特征是， 所述导向槽 (7) 内设有连接轴 (5), 绕连接轴 (5)的外周开有凹槽 (501), —锁片（6)设置在两连接轴 (5)之间， 锁片（6)上还开有通孔 (601)， 锁片（6)的厚度与连接轴 (5)的凹槽 (501)宽 度相匹配，锁片（6)側边插于连接轴 (5)的凹槽 (501)内，所述锁片（6)侧边设有侧斜边 (602)。  The improved structure of the drum brake according to claim 1, wherein the guide groove (7) is provided with a connecting shaft (5), and a groove (501) is formed around the outer circumference of the connecting shaft (5). , the locking piece (6) is disposed between the two connecting shafts (5), and the locking piece (6) is further provided with a through hole (601), the thickness of the locking piece (6) and the groove of the connecting shaft (5) ( 501) The width is matched, the side of the locking piece (6) is inserted into the groove (501) of the connecting shaft (5), and the side of the locking piece (6) is provided with a side oblique side (602).
PCT/CN2009/000506 2008-11-07 2009-05-11 An improving structure of drum brake WO2010051678A1 (en)

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CN105020300A (en) * 2015-06-18 2015-11-04 盐城市诚良高尔夫电动车配件有限公司 Hub type brake
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