阅读说明：本技术 一种基于鼓刹的双向领蹄式制动机构 (Two-way leading hoof type brake mechanism based on drum is stopped ) 是由 周长虹 于 2020-04-10 设计创作，主要内容包括：本发明涉及汽车制动设备技术领域,且公开了一种基于鼓刹的双向领蹄式制动机构,包括刹车鼓盘,刹车鼓盘面的中部设有滑动凹槽,且在刹车鼓盘的内壁上设有摩擦片,制动蹄的一侧设有球型滑槽。该基于鼓刹的双向领蹄式制动机构,通过制动连杆Ⅰ、制动连杆Ⅱ和制动球座的设置,利用轴心旋转的方式,使得固定安装制动连杆Ⅰ和制动连杆Ⅱ两端的四组制动球座可以同步移动,与现有的技术相比,可以确保制动蹄的上下两端同时向外侧撑开来对摩擦片施加压力,进而有效地缓解了动压缸在制动时所要承受的载荷压力,同时使得制动蹄两端的受力较为均匀,从而有效地减小了其在制动时所产生的振动,进而降低其对于摩擦片的磨损、延长其使用寿命。(The invention relates to the technical field of automobile braking equipment, and discloses a drum brake-based bidirectional leading shoe type braking mechanism which comprises a brake drum disc, wherein a sliding groove is formed in the middle of the disc surface of the brake drum, a friction plate is arranged on the inner wall of the brake drum disc, and a spherical sliding groove is formed in one side of a brake shoe. This two-way leading hoof formula arrestment mechanism based on drum is stopped, through brake connecting rod I, brake connecting rod II and the setting of brake ball seat, utilize the rotatory mode in axle center, make four groups brake ball seats at fixed mounting brake connecting rod I and brake connecting rod II both ends can the synchronous motion, compared with the prior art, can ensure that the upper and lower both ends of brake shoe are propped open to the outside simultaneously and are exerted pressure to the friction disc, and then alleviated the load pressure that dynamic pressure jar will bear when the braking effectively, make the atress at brake shoe both ends comparatively even simultaneously, thereby reduced its produced vibration when braking effectively, and then reduce its wearing and tearing to the friction disc, prolong its life.)

1. The utility model provides a two-way leading hoof formula arrestment mechanism based on drum is stopped, includes brake drum dish (1), its characterized in that: the brake drum is characterized in that a sliding groove (2) is formed in the middle of the surface of the brake drum disc (1), friction plates (3) are arranged on the inner wall of the brake drum disc (1), a brake shoe (4) is movably connected into the sliding groove (2) in the brake drum disc (1), a spherical sliding groove (5) is formed in one side of the brake shoe (4), a brake connecting rod I (6) and a brake connecting rod II (7) are arranged inside the brake drum disc (1), the brake connecting rod I (6) is movably connected with the middle of the brake connecting rod II (7), a set of brake ball seats (8) are fixedly arranged at two ends of the brake connecting rod I (6) and the brake connecting rod II (7) respectively, the outer surface of each brake ball seat (8) is in contact with the inner wall of the spherical sliding groove (5) in the brake shoe (4), and the tops of the outer surfaces of the brake connecting rod I (6) and the brake connecting rod II (7), the top end of the brake support (9) is in transmission connection with a movable pressure cylinder (11) fixedly installed at the top of the front face of the brake drum disc (1), a set of fixed pin shafts (12) are fixedly installed on the upper side and the lower side of the front face of each brake shoe (4) respectively, and the fixed pin shafts (12) on the two sets of brake shoes (4) are in transmission connection through two sets of return springs (13) respectively.

2. The drum brake based two-way leading shoe brake mechanism of claim 1, wherein: the both sides of braking support (9) bottom are fixed mounting respectively have a set of fixed sleeve (10), and the inner wall of two sets of fixed sleeve (10) respectively with the outer surface activity suit of braking connecting rod I (6) and braking connecting rod II (7), the contained angle between two sets of fixed sleeve (10) is 90 simultaneously.

3. The drum brake based two-way leading shoe brake mechanism of claim 1, wherein: the two symmetrical sides of the friction plate (3) are respectively provided with 3-5 groups of through grooves.

4. The drum brake based two-way leading shoe brake mechanism of claim 1, wherein: the bottom of the braking ball seat (8) is provided with a supporting ball, the thickness of the bottom end of the braking ball seat (8) is smaller than the inner diameter of the supporting ball, and the supporting ball penetrates into the braking ball seat (8) and is below the central axis.

5. The drum brake based two-way leading shoe brake mechanism of claim 1, wherein: the brake drum is characterized in that an eccentric structure is formed between the outer wall and the inner wall of the brake shoe (4), and the circle center of the outer wall of the brake shoe (4) is located on the central axis of the brake drum disc (1).

Technical Field

The invention relates to the technical field of automobile brake equipment, in particular to a drum brake-based bidirectional leading shoe type brake mechanism.

Background

The drum brake is a brake device which uses the friction between the static brake block in the brake drum and the inner surface of the friction drum rotating along with the rotation of the wheel to generate corresponding friction force to reduce the rotation speed of the wheel, thereby achieving the purpose of braking.

The bidirectional leading shoe type brake is one of drum brake type structures, unidirectional problems of drum brakes with other types of structures can be effectively avoided, namely, the braking efficiency is good when the bidirectional leading shoe type brake moves forward, but the braking efficiency is greatly reduced when the bidirectional leading shoe type brake backs a car, but when a braking pressure cylinder is used for extruding the braking shoes, pressure is applied to one end of two groups of braking shoes, so that the loading pressure born by the braking pressure cylinder during working is larger, the abrasion is more serious under the same working environment, and because the two ends of the braking shoes are stressed unevenly, the vibration caused during braking is larger, the abrasion of the two ends of the braking shoes to a friction plate is greatly increased, and the service life of the friction plate is further shortened.

Disclosure of Invention

Technical problem to be solved

The invention provides a drum brake-based bidirectional leading shoe type brake mechanism which has the advantages that pressure is applied to two ends of a brake shoe at the same time, the load bearing of a brake cylinder during working is reduced, and the synchronous pressure application vibration and abrasion are small.

(II) technical scheme

The invention provides the following technical scheme: a two-way collar shoe type brake mechanism based on drum braking comprises a brake drum disc, wherein a sliding groove is formed in the middle of the disc surface of the brake drum disc, a friction plate is arranged on the inner wall of the brake drum disc, a brake shoe is movably connected in the sliding groove on the brake drum disc, a spherical sliding groove is formed in one side of the brake shoe, a brake connecting rod I and a brake connecting rod II are arranged inside the brake drum disc, the middle parts of the brake connecting rod I and the brake connecting rod II are movably connected, a group of brake ball seats are fixedly arranged at two ends of the brake connecting rod I and the brake connecting rod II respectively, the outer surfaces of the brake ball seats are in contact with the inner wall of the spherical sliding groove on the brake shoe, the tops of the outer surfaces of the brake connecting rod I and the brake connecting rod II are in transmission connection through a brake support, the top end of the brake support is in transmission connection with a dynamic pressure cylinder fixedly arranged at the front top, and the fixed pin shafts on the two groups of brake shoes are respectively in transmission connection through two groups of return springs.

Preferably, the both sides of braking support bottom are fixed mounting respectively has a set of fixed sleeve, and the inner wall of two sets of fixed sleeves respectively with the outer surface activity suit of braking connecting rod I and braking connecting rod II, the contained angle between two sets of fixed sleeves simultaneously is 90.

Preferably, 3-5 groups of penetrating grooves are respectively formed in two symmetrical sides of the friction plate.

Preferably, the bottom of the braking ball seat is provided with a supporting ball, the thickness of the bottom end of the braking ball seat is smaller than the inner diameter of the supporting ball, and the supporting ball penetrates into the braking ball seat and is below the central axis.

Preferably, the outer wall and the inner wall of the brake shoe are arranged in an eccentric structure, and the circle center of the outer wall of the brake shoe is located on the central axis of the brake drum.

(III) advantageous effects

The invention has the following beneficial effects:

1. this two-way leading hoof formula arrestment mechanism based on drum is stopped, through brake connecting rod I, brake connecting rod II and the setting of brake ball seat, utilize the rotatory mode in axle center, make four groups brake ball seats at fixed mounting brake connecting rod I and brake connecting rod II both ends can the synchronous motion, compared with the prior art, can ensure that the upper and lower both ends of brake shoe are propped open to the outside simultaneously and are exerted pressure to the friction disc, and then alleviated the load pressure that dynamic pressure jar will bear when the braking effectively, make the atress at brake shoe both ends comparatively even simultaneously, thereby reduced its produced vibration when braking effectively, and then reduce its wearing and tearing to the friction disc, prolong its life.

2. This two-way leading hoof formula arrestment mechanism based on drum is stopped, to the setting of brake shoe outer structure for brake connecting rod I and brake connecting rod II when the extrusion that receives the dynamic pressure jar takes place the central rotation, can effectually drive two sets of brake shoes of mutual symmetry outwards strut and extrude the braking effect of friction disc and production, can not cause the unable phenomenon of outwards strutting of two sets of brake shoes of mutual symmetry because of brake connecting rod I and brake connecting rod II are because of the rotation in the circumference, and then improved this arrestment mechanism's stability and reliability effectively.

3. This two-way leading hoof formula arrestment mechanism based on drum is stopped to running through the setting of formula recess on the friction disc, can enough collect under the effect of centrifugal force and store the friction disc because of the produced piece of wearing and tearing when the braking to increase this arrestment mechanism's braking efficiency, make the friction disc have certain buffer memory space when the braking friction thermal expansion simultaneously, can not lead to the protruding condition that causes excessive wearing and tearing of friction disc because of the thermal expansion, further improved security and stability of this arrestment mechanism when long-time braking.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a half-sectional view of a brake drum of the present invention;

FIG. 3 is a schematic structural view of a brake shoe according to the present invention;

FIG. 4 is a schematic structural view of a detent ball seat according to the present invention;

fig. 5 is a schematic structural view of the braking bracket of the present invention.

In the figure: 1. a brake drum disc; 2. a sliding groove; 3. a friction plate; 4. a brake shoe; 5. a spherical chute; 6. a brake connecting rod I; 7. a brake connecting rod II; 8. a braking ball seat; 9. a brake bracket; 10. fixing the sleeve; 11. a braking pressure cylinder; 12. fixing a pin shaft; 13. and a return spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a two-way shoe-leading type brake mechanism based on a drum brake comprises a brake drum disc 1, a sliding groove 2 is arranged in the middle of the surface of the brake drum disc 1, a friction plate 3 is arranged on the inner wall of the brake drum disc 1, a brake shoe 4 is movably connected in the sliding groove 2 on the brake drum disc 1, a spherical sliding groove 5 is arranged on one side of the brake shoe 4, a brake connecting rod i 6 and a brake connecting rod ii 7 are arranged in the brake drum disc 1, the middle parts of the brake connecting rod i 6 and the brake connecting rod ii 7 are movably connected, a group of brake ball seats 8 are respectively and fixedly arranged at the two ends of the brake connecting rod i 6 and the brake connecting rod ii 7, the outer surfaces of the brake ball seats 8 are in contact with the inner wall of the spherical sliding groove 5 on the brake shoe 4, the tops of the outer surfaces of the brake connecting rod i 6 and the brake connecting rod ii 7 are in transmission connection through a brake support 9, the top, a group of fixed pin shafts 12 are respectively and fixedly arranged on the upper side and the lower side of the front surface of the brake shoe 4, and the fixed pin shafts 12 on the two groups of brake shoes 4 are respectively in transmission connection through two groups of return springs 13.

Wherein, to the setting of brake connecting rod I6, brake connecting rod II 7 and brake ball seat 8, utilize the rotatory mode of axle center, make four groups brake ball seats 8 at fixed mounting brake connecting rod I6 and brake connecting rod II 7 both ends can synchronous motion, thereby guaranteed that the upper and lower both ends of brake shoe 4 strut to the outside simultaneously and come to exert pressure to friction disc 3, and then the effectual load pressure that bears when the braking of dynamic pressure jar 11 of having alleviated, make the atress at brake shoe 4 both ends comparatively even simultaneously, and then the effectual vibration that produces when the braking that has reduced it.

In this technical scheme, the both sides of braking support 9 bottom are fixed mounting respectively has a set of fixed sleeve 10, and the inner wall of two sets of fixed sleeve 10 respectively with the outer surface activity suit of braking connecting rod I6 and braking connecting rod II 7, the contained angle between two sets of fixed sleeve 10 is 90 simultaneously.

Wherein, to the setting of braking support 9 and fixed sleeve 10 on it for braking support 9 is at the in-process that reciprocates along with moving the pneumatic cylinder 11, can effectually exert pressure to the top of brake connecting rod I6 and the II 7 external surfaces of brake connecting rod, and then makes two sets of brake shoes 4 of mutual symmetry can inwards contract or outwards strut, and stability and reliability are higher.

In this technical scheme, the both sides of friction disc 3 mutual symmetry are equipped with 3 ~ 5 group's run-through grooves respectively.

Wherein, to the setting of through groove on the friction disc 3, can enough collect under the effect of centrifugal force and store friction disc 3 because of the produced piece of wearing and tearing when the braking, make friction disc 3 be heated the thermal expansion and have certain buffer memory space simultaneously, can not lead to the protruding condition that causes excessive wearing and tearing of friction disc 3 because of the thermal expansion, and then the effectual life who improves friction disc 3, improve security and stability of this arrestment mechanism when braking for a long time simultaneously.

In this technical scheme, the bottom of braking ball seat 8 is equipped with the support ball, and the thickness of 8 bottoms of braking ball seat is less than the internal diameter of supporting the ball, supports the inside below the axis that the ball gos deep into braking ball seat 8 simultaneously.

Wherein, to the setting of brake ball seat 8 and structure, can effectually reduce the frictional force between brake shoe 4 and the brake ball seat 8 for the phenomenon that the card pause can not appear comparatively smoothly when strutting brake shoe 4 to the outside in brake connecting rod I6 and brake ball seat 8, and then improved the sensitivity of this brake mechanism when the braking.

In the technical scheme, an eccentric structure is arranged between the outer wall and the inner wall of the brake shoe 4, and the circle center of the outer wall of the brake shoe 4 is positioned on the central axis of the brake drum disc 1.

Wherein, to the setting of brake shoe 4 exterior structure for brake connecting rod I6 and brake connecting rod II 7 can effectually drive two sets of brake shoes 4 of mutual symmetry outwards strut and extrude friction disc 3 and the braking effect that produces when the extrusion that receives pneumatic cylinder 11 takes place the central rotation, can not lead to the phenomenon that two sets of brake shoes 4 can't outwards strut because of brake connecting rod I6 and brake connecting rod II 7 internal rotation in the circumference, further improvement this arrestment mechanism's stability and reliability.

The use method and the working principle of the embodiment are as follows:

firstly, the brake mechanism is fixedly arranged on a wheel shaft of a vehicle, a movable pressure cylinder 11 is communicated with a brake hydraulic cylinder, when the brake is needed, a brake pedal is stepped down, the movable pressure cylinder 11 is started and drives a brake bracket 9 to move downwards, under the action of two groups of fixed sleeves 10 on the brake bracket 9, a brake connecting rod I6 and a brake connecting rod II 7 are caused to rotate along a central axis, under the sliding support action of a brake ball seat 8, two groups of brake shoes 4 which are mutually symmetrical are driven to be opened outwards along the track of a spherical sliding groove 5, and simultaneously a return spring 13 is stretched to store certain elastic potential energy so as to extrude and rub with a friction plate 3 fixedly arranged on the inner wall of a brake drum disc 1, and then a certain brake force is generated on the brake drum disc 1 which rotates at a high speed to force the vehicle to decelerate or stop; when the brake pedal is released, the movable cylinder 11 drives the brake bracket 9 to move upwards due to the loss of the pressure of the hydraulic oil, meanwhile, the two groups of brake shoes 4 which are symmetrical to each other lose the pressure applied to the brake bracket by the brake connecting rod I6 and the brake connecting rod II 7, and under the action of the elastic force of the return spring 13, the two groups of brake shoes 4 which are symmetrical to each other start to move inwards, so that the separated friction plates 3 are not in frictional contact with the separated friction plates, and the wheel axle can rotate at a high speed.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.