CN215257528U - Drum brake for electric automobile - Google Patents
Drum brake for electric automobile Download PDFInfo
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- CN215257528U CN215257528U CN202121229504.2U CN202121229504U CN215257528U CN 215257528 U CN215257528 U CN 215257528U CN 202121229504 U CN202121229504 U CN 202121229504U CN 215257528 U CN215257528 U CN 215257528U
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Abstract
A drum brake for an electric automobile comprises a motor inner end cover, a brake chassis, a brake shoe assembly, a brake drum and a stabilizing device which are coaxially arranged, wherein an accommodating cavity is formed in one end of the motor inner end cover; the brake chassis is in a basin shape and is buckled in the accommodating cavity; the brake shoe assembly is arranged in the brake chassis; the brake drum is arranged in the brake chassis and sleeved outside the brake shoe assembly; the brake shoe assembly comprises a first brake shoe and a second brake shoe, the upper ends of the first brake shoe and the second brake shoe are hinged together through a main pin, and the lower ends of the first brake shoe and the second brake shoe are abutted through an adjusting sleeve; an adjusting block is arranged in the middle of the adjusting sleeve; the stabilizing device comprises a bracket and a supporting pin; the supporting pin is slidably arranged on the bracket and is parallel to the adjusting sleeve, and a spring is sleeved on the supporting pin; the supporting pin is provided with two, and two supporting pins are located the both ends about the adjusting block respectively, with the adjusting block butt, the utility model discloses can make the brake shoe assembly remain stable.
Description
Technical Field
The present disclosure relates generally to the field of machinery, and more particularly, to a drum brake for an electric vehicle.
Background
In the electric automobile industry, the motor is integrated at the hub part, so that the turning performance of the automobile is obviously improved, and in addition, a plurality of transmission parts can be omitted, so that the automobile structure is simplified; when the drum brake works, a driver steps on a brake pedal, the pressure of a brake cylinder is transmitted to a brake oil cavity, a brake shoe is propped open, the brake shoe plate and the brake drum generate friction, so that braking force is generated, and after the driver releases the brake pedal, the pressure in the brake cylinder disappears, and the brake shoe returns; the existing drum brake has insufficient installation stability of brake shoes, and the brake shoes can swing in the normal running process of a vehicle, so that the brake performance is influenced; in addition, the installation position of the brake shoe and the brake pump is simple in treatment mode, only the installation position is coated with lubricating grease, the lubricating grease is easily consumed by the brake pump in the braking process, and the lubricating performance is reduced due to long-time running.
Therefore, in order to solve the problem that the brake performance is affected due to instable installation of brake shoes in the existing drum brake, a drum brake for an electric automobile is needed urgently.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a drum brake for electric automobile, which comprises a coaxially arranged motor inner end cover 1, a brake chassis 2, a brake shoe assembly 3, a brake drum 4, an adjusting sleeve 5 and a stabilizing device 6, wherein one end of the motor inner end cover 1 is provided with an accommodating cavity 11; the brake chassis 2 is in a basin shape and is buckled in the accommodating cavity 11; the brake shoe assembly 3 is arranged in the brake chassis 2; the brake drum 4 is arranged in the brake chassis 2 and sleeved outside the brake shoe assembly 3; the brake shoe assembly 3 comprises a first brake shoe 31 and a second brake shoe 32 which are distributed in a left-right symmetrical mode by taking a main pin 33 fixed at the middle position of the upper part of the brake chassis 2 as a center, the upper ends of the first brake shoe 31 and the second brake shoe 32 are hinged together through the main pin 33, and the lower ends of the first brake shoe 31 and the second brake shoe 32 are abutted through an adjusting sleeve 5; an adjusting block 51 is arranged in the middle of the adjusting sleeve 5; the stabilizing device 6 comprises a bracket 61 and a supporting pin 62, wherein the bracket 61 is fixedly arranged in the middle of the lower part of the brake chassis 2; the supporting pin 62 is slidably arranged on the bracket 61 and is parallel to the adjusting sleeve 5, and a stabilizing spring 63 is sleeved on the supporting pin 62; the two support pins 62 are respectively positioned at the left end and the right end of the adjusting block 51 and are abutted against the adjusting block 51; the stabilizing spring 63 has one end abutting against the bracket 61 and the other end abutting against one end of the support pin 62 near the adjusting block 51, and is used for clamping the adjusting block 51 by the two support pins 62 to stabilize the brake shoe assembly 3.
According to an embodiment of the present invention, the bracket 61 has a U-shaped structure, and includes a fixing plate 64, a first supporting plate 65, and a second supporting plate 66; the fixing plate 64 is horizontally fixed on the brake chassis 2 through bolts; the first supporting plate 65 and the second supporting plate 66 are vertically arranged at the left end and the right end of the fixing plate 64 respectively; the two support pins 62 are slidably disposed on a first support plate 65 and a second support plate 66, respectively.
According to an embodiment of the present invention, the bracket 61 is an integrally formed structure.
According to an embodiment of the present invention, the first brake shoe 31 and the second brake shoe 32 are both pressed and floatingly connected to the brake chassis 2 by a plurality of through nails 34; the positions of the brake chassis 2 corresponding to the through nails 34 are provided with a plurality of oil storage holes 21.
According to the utility model discloses an embodiment, a plurality of oil storage holes 21 are the honeycomb setting.
According to an embodiment of the present invention, the device further comprises two upper return springs 35 and two lower return springs 36, wherein the two upper return springs 35 are provided; two upper return springs 35 are connected to the upper ends of first brake shoe 31 and second brake shoe 32 and to kingpin 33, respectively; lower return springs 36 are attached to the lower ends of first brake shoe 31 and second brake shoe 32, respectively.
According to an embodiment of the present invention, the brake device further comprises a brake pump 37 and a support bar 38, wherein the brake pump 37 is disposed on the brake chassis 2, and both ends of the brake pump 37 are respectively abutted to the upper ends of the first brake shoe 31 and the second brake shoe 32 and located below the kingpin 33; and the support bar 38 is arranged below the brake pump 37, and two ends of the support bar are respectively abutted against the upper ends of the first brake shoe 31 and the second brake shoe 32.
According to an embodiment of the present invention, two ends of the two support pins 62 are respectively provided with a fixed block 67 and an open washer 68; the two support pins 62 are respectively abutted against the adjusting block 51 through fixing blocks 67; two ends of the stabilizing spring 63 are respectively abutted against the fixing block 67 and the bracket 61.
The utility model is provided with the brake shoe assembly and the brake drum, and the brake can be carried out through the friction between the brake shoe assembly and the brake drum; the stabilizing device is arranged to be matched with the adjusting cylinder, and the vibration of the brake shoe assembly can be eliminated through the matching of the adjusting device and the adjusting cylinder, so that the brake shoe assembly is kept stable and a better braking state is always kept; the stabilizing device comprises a support and two support pins, and the support is fixed on the brake pump ground plate, so that the structure of the stabilizing device can be more stable; the two supporting pins are arranged on the support in a sliding mode and are positioned at two ends of the adjusting block, the supporting pins are sleeved with stabilizing springs, the adjusting block is clamped by the two supporting pins, the adjusting sleeve is limited through the elastic force of the stabilizing springs, and therefore vibration of the brake shoe assembly is eliminated, and the brake shoe assembly is kept stable; the fixing plate is arranged at the lower end of the bracket, so that the bracket can be better attached to a brake chassis, and the bracket structure is more stable; the first supporting plate and the second supporting plate are arranged, so that the first supporting plate and the second supporting plate are respectively positioned at the left end and the right end of the fixing plate, the two supporting pins are respectively arranged on the first supporting plate and the second supporting plate in a sliding manner, the shaking of the supporting pins during sliding can be reduced, and the supporting pins are more stable; the support is arranged to be of a U-shaped structure, so that the overall structure of the support seat is more stable, and the stability effect is better when the brake shoe is limited and stabilized; the support is arranged to be of an integrally formed structure, so that the support structure is firmer and has better stabilizing effect; the positions, corresponding to the through-nails, on the brake chassis are provided with oil storage holes, so that lubricating oil can be stored, a lubricating effect is provided, the friction coefficient is reduced, the brake performance is prevented from being influenced by the friction between the brake shoe and the brake chassis during the action, the brake function is prevented from being blocked, the lubricating oil in the oil storage holes is long in retention time and not easy to be consumed, and the performance durability of the brake pump is improved; set up a plurality of oil storage holes and be honeycomb, not only can guarantee stopper chassis structural stability, can make lubricating oil distribution more even moreover, lubricated effect is better, the utility model discloses simple structure, small, occupation space is little, convenient production and installation.
Drawings
FIG. 1 is a schematic view of the overall structure of a brake shoe assembly;
FIG. 2 is a schematic view of an overall drum brake for an electric vehicle;
FIG. 3 is a schematic view of the overall structure of the stabilizer;
fig. 4 is a schematic view of the overall structure of the brake chassis.
In the drawing, 1, a motor inner end cover, 11, a containing cavity, 2, a brake chassis, 21, an oil storage hole, 3, a brake shoe assembly, 31, a first brake shoe, 32, a second brake shoe, 33, a main pin, 34, a through nail, 35, an upper return spring, 36, a lower return spring, 37, a brake pump, 38, a support bar, 4, a brake drum, 5, an adjusting sleeve, 51, an adjusting block, 6, a stabilizing device, 61, a support, 62, a support pin, 63, a stabilizing spring, 64, a fixing plate, 65, a first support plate, 66, a second support plate, 67, a fixing block, 68 and a split washer.
Detailed Description
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like elements and techniques of the present invention so that advantages and features of the present invention may be more readily understood when implemented in a suitable environment. The following description is an embodiment of the present invention, and other embodiments related to the claims that are not explicitly described also fall within the scope of the claims.
In the description of the present invention, it is to be understood that the positional relationships indicated by the terms "front", "rear", "left", "right", "upper", "lower", "top", "bottom", "inner", "outer", etc., are based on the positional relationships shown in the drawings, and are for convenience only to describe the present invention and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Fig. 1 shows a schematic view of the overall structure of the brake shoe assembly.
Fig. 2 shows a schematic view of the overall structure of a drum brake for an electric vehicle.
As shown in fig. 1 and 2, a drum brake 37 for an electric vehicle comprises a motor inner end cap 1, a brake chassis 2, a brake shoe assembly 3, a brake drum 4, an adjusting sleeve 5 and a stabilizing device 6 which are coaxially arranged, wherein an accommodating cavity 11 is formed at one end of the motor inner end cap 1; the brake chassis 2 is in a basin shape and is buckled in the accommodating cavity 11; the brake shoe assembly 3 is arranged in the brake chassis 2; the brake drum 4 is arranged in the brake chassis 2 and sleeved outside the brake shoe assembly 3; the brake shoe assembly 3 comprises a first brake shoe 31 and a second brake shoe 32 which are distributed in a left-right symmetrical mode by taking a main pin 33 fixed at the middle position of the upper part of the brake chassis 2 as a center, the upper ends of the first brake shoe 31 and the second brake shoe 32 are hinged together through the main pin 33, and the lower ends of the first brake shoe 31 and the second brake shoe 32 are abutted through an adjusting sleeve 5; an adjusting block 51 is arranged in the middle of the adjusting sleeve 5; the stabilizing device 6 comprises a bracket 61 and a supporting pin 62, wherein the bracket 61 is fixedly arranged in the middle of the lower part of the brake chassis 2; the supporting pin 62 is slidably arranged on the bracket 61 and is parallel to the adjusting sleeve 5, and a stabilizing spring 63 is sleeved on the supporting pin 62; the two support pins 62 are respectively positioned at the left end and the right end of the adjusting block 51 and are abutted against the adjusting block 51; the stabilizing spring 63 has one end abutting against the bracket 61 and the other end abutting against one end of the support pin 62 near the adjusting block 51, and is used for clamping the adjusting block 51 by the two support pins 62 and stabilizing the brake shoe. The device also comprises two upper return springs 35 and two lower return springs 36, wherein the two upper return springs 35 are arranged; two upper return springs 35 are connected to the upper ends of first brake shoe 31 and second brake shoe 32 and to kingpin 33, respectively; lower return springs 36 are attached to the lower ends of first brake shoe 31 and second brake shoe 32, respectively. The brake device further comprises a brake pump 37 and a support bar 38, wherein the brake pump 37 is arranged on the brake chassis 2, two ends of the brake pump 37 are respectively abutted against the upper ends of the first brake shoe 31 and the second brake shoe 32 and are positioned below the main pin 33; and the support bar 38 is arranged below the brake pump 37, and two ends of the support bar are respectively abutted against the upper ends of the first brake shoe 31 and the second brake shoe 32.
The contact refers to mutual contact and fixed connection.
The two ends of the support bar are respectively abutted against the upper ends of the first brake shoe 31 and the second brake shoe 32, and the support bar is used for supporting the first brake shoe 31 and the second brake shoe 32 so as to keep the first brake shoe 31 and the second brake shoe 32 stable.
The adjusting sleeve 5 is used for being fixedly connected with the lower ends of the first brake shoe 31 and the second brake shoe 32 and keeping synchronous movement with the first brake shoe 31 and the second brake shoe 32, an adjusting block 51 is arranged in the middle of the adjusting sleeve 5 and can be matched with the stabilizing device 6, and the motion state of the adjusting sleeve 5 is controlled and adjusted through the stabilizing device 6, so that the brake shoe assembly 3 is kept stable.
Stabilising arrangement 6 can be the arbitrary vibrations state that can eliminate brake shoe assembly 3, makes brake shoe assembly 3 remain stable device, the utility model discloses set up stabilising arrangement 6 and include support 61 and supporting pin 62, establish stabilizing spring 63 at the supporting pin 62 upper cover, make two supporting pins 62 be located the left and right sides of adjusting block 51 respectively, through spring force, make two supporting pins 62 press from both sides tight adjusting block 51, through the motion state of control adjusting block 51 to the action of first brake shoe 31 of control and second brake shoe 32 makes brake shoe assembly 3 remain stable.
The support 61 is fixedly arranged on the brake chassis 2 and used for fixing the support pin 62, and the support 61 can be arranged into any structure capable of supporting the support pin 62, such as a U-shaped structure or a support rod, the utility model discloses preferably set the support 61 as a U-shaped structure, including a fixing plate 64, a first support plate 65 and a second support plate 66, the fixing plate 64 is horizontally fixed on the brake chassis 2 through bolts; the first supporting plate 65 and the second supporting plate 66 are vertically arranged at the left end and the right end of the fixing plate 64 respectively; the two support pins 62 are respectively arranged on a first support plate 65 and a second support plate 66 in a sliding manner, and two ends of the two support pins 62 are respectively provided with a fixed block 67 and an open gasket 68; the two support pins 62 are respectively abutted against the adjusting block 51 through fixing blocks 67; two ends of the stabilizing spring 63 are respectively abutted against the fixing block 67 and the bracket 61; a stabilizing spring 63 sleeved on a supporting pin 62 arranged on the first supporting plate 65 is respectively abutted with the first supporting plate 65 and a fixed block 67 on the supporting pin 62; the stabilizer spring 63 fitted around the support pin 62 provided on the second support plate 66 abuts against the second support plate 66 and the fixing block 67 on the support pin 62, respectively.
The support 61 is arranged to be of a U-shaped structure, the fixing plate 64 is arranged at the lower end of the support 61, the support 61 can be better attached to the brake chassis 2, the structure of the support 61 is more stable, the first support plate 65 and the second support plate 66 are arranged, the first support plate 65 and the second support plate 66 are respectively located at the left end and the right end of the fixing plate 64, the two support pins 62 are respectively arranged on the first support plate 65 and the second support plate 66 in a sliding mode, and the support pins 62 can be reduced in shaking during sliding and are more stable; set up support 61 and be U type structure, can make support 61 overall structure more stable, when carrying out spacing stability to brake shoe assembly 3, it is better to stabilize the effect.
Two upper return springs 35 and a lower return spring 36 are arranged on the brake shoe assembly 3, and the two upper return springs 35 are respectively connected with the upper ends of the first brake shoe 31 and the second brake shoe 32 and the main pin 33; the lower return spring 36 is connected to the lower ends of the first brake shoe 31 and the second brake shoe 32, respectively, and the upper return spring 35 and the lower return spring 36 are used for separating the first brake shoe 31 and the second brake shoe 32 from the brake drum 4 by a tensile force after the brake pump 37 loses the braking force at the end of braking, so as to reset the first brake shoe 31 and the second brake shoe 32.
The brake shoe assembly 3 is provided with a brake pump 37, the brake pump 37 is arranged on the brake chassis 2, two ends of the brake pump 37 are respectively abutted against the upper ends of the first brake shoe 31 and the second brake shoe 32 and are positioned below the main pin 33, and when braking, the brake pump 37 supports force on the first brake shoe 31 and the second brake shoe 32, so that the first brake shoe 31 and the second brake shoe 32 are spread to rub against the brake drum 4, and the brake drum 4 is prevented from rotating, so that braking is performed.
The brake shoe assembly 3 is provided with a support plate, and two ends of the support plate are respectively abutted against the upper ends of the first brake shoe 31 and the second brake shoe 32 and are located below the brake pump 37.
When the brake shoe assembly 3 vibrates, the adjusting sleeve 5 is driven to vibrate, the supporting pin 62 on the stabilizing device 6 slides left and right along with the vibration of the adjusting sleeve 5, the stabilizing spring 63 sleeved on the supporting pin 62 generates a reaction force along with the left and right sliding of the supporting pin 62, so that the supporting pin 62 returns, the supporting pin 62 controls the motion state of the adjusting sleeve 5, the vibration of the adjusting sleeve is weakened until the vibration disappears, the stabilizing spring keeps stable, and the brake shoe assembly 3 always keeps a better brake state.
When the utility model is used, when the brake is not performed, under the action of the upper return spring 35 and the lower return spring 36, the first brake shoe 31 and the second brake shoe 32 are both separated from the brake drum 4, and the brake drum 4 operates normally; when braking, a piston on the brake pump 37 moves outwards to expand the first brake shoe 31 and the second brake shoe 32, and under the action of the piston of the brake pump 37, the first brake shoe 31 and the second brake shoe 32 rotate around the main pin 33 towards the inner wall of the brake drum 4 until the first brake shoe 31 and the second brake shoe 32 are in contact friction with the inner wall of the brake drum 4 to brake; meanwhile, the stabilizing device 6 positioned at the lower ends of the first brake shoe 31 and the second brake shoe 32 can limit the brake shoe assembly 3, and when the brake shoe assembly 3 vibrates due to friction or inertia, the stabilizing device 6 can eliminate the vibration of the brake shoe assembly 3, so that the brake shoe assembly is kept stable and a better braking state is always kept.
The utility model is provided with the brake shoe assembly and the brake drum, and the brake can be carried out through the friction between the brake shoe assembly and the brake drum; the stabilizing device is arranged to be matched with the adjusting cylinder, and the vibration of the brake shoe assembly can be eliminated through the matching of the adjusting device and the adjusting cylinder, so that the brake shoe assembly is kept stable and a better braking state is always kept; the stabilizing device comprises a bracket and two supporting pins, and the bracket is fixed on the brake chassis, so that the structure of the stabilizing device can be more stable; the two supporting pins are slidably arranged on the support and located at two ends of the adjusting block, the supporting pins are sleeved with springs, the adjusting block is clamped by the two supporting pins, and the adjusting sleeve is limited by the elasticity of the springs, so that the vibration of the brake shoe assembly is eliminated, and the brake shoe assembly is kept stable.
Fig. 3 shows a schematic view of the overall structure of the stabilization device.
As shown in fig. 3, the bracket 61 has a U-shaped structure, and includes a fixing plate 64, a first supporting plate 65, and a second supporting plate 66; the fixing plate 64 is horizontally fixed on the brake chassis 2 through bolts; the first supporting plate 65 and the second supporting plate 66 are vertically arranged at the left end and the right end of the fixing plate 64 respectively; the two support pins 62 are slidably disposed on a first support plate 65 and a second support plate 66, respectively; the bracket 61 is an integrally formed structure.
The utility model is provided with the bracket in a U-shaped structure, and the lower end is provided with the fixed plate, so that the bracket can be better attached to the brake chassis, and the bracket structure is more stable; the first supporting plate and the second supporting plate are arranged, so that the first supporting plate and the second supporting plate are respectively positioned at the left end and the right end of the fixing plate, the two supporting pins are respectively arranged on the first supporting plate and the second supporting plate in a sliding manner, the shaking of the supporting pins during sliding can be reduced, and the supporting pins are more stable; the support is arranged to be of a U-shaped structure, so that the overall structure of the support seat is more stable, and the stability effect is better when the brake shoe is limited and stabilized; the support is arranged to be of an integrally formed structure, so that the overall structure of the support is firmer, and the stabilizing effect is better.
Fig. 4 shows a schematic view of the overall structure of the brake spider.
As shown in fig. 1 and 4, each of the first brake shoe 31 and the second brake shoe 32 is press-floatingly connected to the brake base 2 by a plurality of through-nails 34; the positions of the brake chassis 2 corresponding to the through nails 34 are provided with a plurality of oil storage holes 21.
The through-nail 34 sequentially penetrates through a through hole in the brake shoe assembly 3, a through-nail 34 spring pad and a through-nail 34 fixing spring, the lower end of the through-nail 34 is in contact with the brake chassis 2, the brake shoe assembly 3 and the brake chassis 2 are pressed to be in floating connection, the through-nail 34 can stretch out and draw back under the elastic force of the spring, the brake shoe assembly 3 is in elastic contact with the brake chassis 2, the through-nail 34 can move along with the brake shoe assembly 3, friction can be generated at the position where the through-nail 34 is in contact with the brake chassis 2 when the through-nail 34 moves, and a plurality of oil storage holes 21 are formed at the position where the brake chassis 2 is in contact with the through-nail 34, so that lubricating oil can be stored, and the friction is reduced.
The oil storage hole 21 is used for storing lubricating oil, provides the lubrication action, reduces coefficient of friction, and it is not good not only to prevent that the through-nail 34 from leading to brake performance with 2 frictions on the stopper chassis when the brake shoe moves, prevents that the circumstances such as card from dying from appearing in the braking function, prevents that equipment from damaging, and a large amount of lubricating oil can be stored to the oil storage hole 21 in addition, need not often paint lubricating oil, can supply equipment to use for a long time, guarantees lubricated effect.
The utility model discloses the position that corresponds with a plurality of drift bolts on the stopper chassis all is provided with the oil storage hole, can store lubricating oil, provides the lubrication action, reduces coefficient of friction, influences brake performance with stopper chassis friction when not only preventing the brake shoe action, prevents that the card from dying to appear in the brake function, and the lubricating oil dwell time in the oil storage hole is long moreover, is difficult for being consumed to carry brake performance durability.
As shown in fig. 4, the plurality of oil holes 21 are arranged in a honeycomb structure.
The utility model discloses set up a plurality of oil storage holes and be the honeycomb setting, not only can guarantee stopper chassis structural stability, can make lubricating oil distribution more even moreover, lubricated effect is better.
As shown in fig. 4, two ends of the two support pins 62 are respectively provided with a fixing block 67 and a split washer 68; the two support pins 62 are respectively abutted against the adjusting block 51 through fixing blocks 67; two ends of the spring are respectively abutted against the fixing block 67 and the bracket 61.
The utility model is provided with the fixed block and the open gasket at the two ends of the supporting pin respectively, and the fixed block is arranged to abut against the adjusting block, so that the supporting pin can be more stably connected with the adjusting block, and the stability of the brake shoe is prevented from being influenced by the inclination or relative sliding; the open gasket is arranged to limit the support pin, so that the support pin can be prevented from falling off the bracket.
The utility model is provided with the brake shoe assembly and the brake drum, and the brake can be carried out through the friction between the brake shoe assembly and the brake drum; the stabilizing device is arranged to be matched with the adjusting cylinder, and the vibration of the brake shoe assembly can be eliminated through the matching of the adjusting device and the adjusting cylinder, so that the brake shoe assembly is kept stable and a better braking state is always kept; the stabilizing device comprises a bracket and two supporting pins, and the bracket is fixed on the brake chassis, so that the structure of the stabilizing device can be more stable; the two supporting pins are arranged on the support in a sliding mode and are positioned at two ends of the adjusting block, the supporting pins are sleeved with stabilizing springs, the adjusting block is clamped by the two supporting pins, the adjusting sleeve is limited through the elastic force of the stabilizing springs, and therefore vibration of the brake shoe assembly is eliminated, and the brake shoe assembly is kept stable; the fixing plate is arranged at the lower end of the bracket, so that the bracket can be better attached to a brake chassis, and the bracket structure is more stable; the first supporting plate and the second supporting plate are arranged, so that the first supporting plate and the second supporting plate are respectively positioned at the left end and the right end of the fixing plate, the two supporting pins are respectively arranged on the first supporting plate and the second supporting plate in a sliding manner, the shaking of the supporting pins during sliding can be reduced, and the supporting pins are more stable; the support is arranged to be of a U-shaped structure, so that the overall structure of the support seat is more stable, and the stability effect is better when the brake shoe is limited and stabilized; the support is arranged to be of an integrally formed structure, so that the support structure is firmer and has better stabilizing effect; the positions, corresponding to the through-nails, on the brake chassis are provided with the oil storage holes, so that lubricating oil can be stored, a lubricating effect is provided, the friction coefficient is reduced, the brake performance is prevented from being influenced by the friction between the brake shoe and the brake chassis during the action, the brake function is prevented from being blocked, the lubricating oil in the oil storage holes is long in retention time and not easy to consume, and the performance durability of the brake is improved; set up a plurality of oil storage holes and be honeycomb, not only can guarantee stopper chassis structural stability, can make lubricating oil distribution more even moreover, lubricated effect is better, the utility model discloses simple structure, small, occupation space is little, convenient production and installation.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim.
Claims (8)
1. A drum brake for an electric automobile is characterized by comprising a motor inner end cover (1), a brake chassis (2), a brake shoe assembly (3), a brake drum (4), an adjusting sleeve (5) and a stabilizing device (6) which are coaxially arranged,
an accommodating cavity (11) is formed in one end of the inner end cover (1) of the motor;
the brake chassis (2) is basin-shaped and is buckled in the accommodating cavity (11);
the brake shoe assembly (3) is arranged in the brake chassis (2);
the brake drum (4) is arranged in the brake chassis (2) and sleeved on the outer side of the brake shoe assembly (3);
the brake shoe assembly (3) comprises a first brake shoe (31) and a second brake shoe (32) which are distributed in bilateral symmetry by taking a main pin (33) fixed at the middle position of the upper part of the brake chassis (2) as a center,
the upper ends of the first brake shoe (31) and the second brake shoe (32) are hinged together through a main pin (33), and the lower ends of the first brake shoe and the second brake shoe are abutted through an adjusting sleeve (5);
an adjusting block (51) is arranged in the middle of the adjusting sleeve (5);
the stabilizing device (6) comprises a bracket (61) and a supporting pin (62),
the bracket (61) is fixedly arranged in the middle of the lower part of the brake chassis (2);
the supporting pin (62) is slidably arranged on the bracket (61) and is parallel to the adjusting sleeve (5), and a stabilizing spring (63) is sleeved on the supporting pin (62);
the number of the supporting pins (62) is two, and the two supporting pins (62) are respectively positioned at the left end and the right end of the adjusting block (51) and are abutted against the adjusting block (51);
one end of the stabilizing spring (63) is abutted with the bracket (61), and the other end of the stabilizing spring is abutted with one end, close to the adjusting block (51), of the supporting pin (62), so that the two supporting pins (62) clamp the adjusting block (51) to keep the brake shoe assembly (3) stable.
2. A drum brake according to claim 1, in which the bracket (61) is of U-shaped configuration comprising a fixed plate (64), a first support plate (65) and a second support plate (66);
the fixing plate (64) is horizontally fixed on the brake chassis (2) through bolts;
the first supporting plate (65) and the second supporting plate (66) are vertically arranged at the left end and the right end of the fixing plate (64) respectively;
the two supporting pins (62) are respectively arranged on a first supporting plate (65) and a second supporting plate (66) in a sliding mode.
3. A drum brake according to claim 2, in which the bracket (61) is of one-piece construction.
4. A drum brake according to claim 1, in which said first (31) and second (32) brake shoes are each compressively floating connected to said brake spider (2) by means of a plurality of through-bolts (34);
and a plurality of oil storage holes (21) are formed in the positions, corresponding to the through nails (34), on the brake chassis (2).
5. A drum brake according to claim 4, in which said oil reservoirs (21) are arranged in a honeycomb structure.
6. The drum brake of claim 1, further comprising an upper return spring (35) and a lower return spring (36),
two upper return springs (35) are arranged;
the two upper return springs (35) are respectively connected with the upper ends of the first brake shoe (31) and the second brake shoe (32) and the main pin (33);
and the lower return spring (36) is respectively connected with the lower ends of the first brake shoe (31) and the second brake shoe (32).
7. A drum brake according to claim 1, further comprising a brake pump (37) and a support bar (38),
the brake pump (37) is arranged on the brake chassis (2), and two ends of the brake pump are respectively abutted against the upper ends of the first brake shoe (31) and the second brake shoe (32) and are positioned below the main pin (33);
and the support bar (38) is arranged below the brake pump (37), and two ends of the support bar are respectively abutted to the upper ends of the first brake shoe (31) and the second brake shoe (32).
8. A drum brake according to claim 1, in which the two ends of the two supporting pins (62) are each provided with a fixing block (67) and a split washer (68);
the two supporting pins (62) are respectively abutted with the adjusting block (51) through fixing blocks (67);
and two ends of the stabilizing spring (63) are respectively abutted against the fixing block (67) and the bracket (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121229504.2U CN215257528U (en) | 2021-06-02 | 2021-06-02 | Drum brake for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121229504.2U CN215257528U (en) | 2021-06-02 | 2021-06-02 | Drum brake for electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215257528U true CN215257528U (en) | 2021-12-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121229504.2U Active CN215257528U (en) | 2021-06-02 | 2021-06-02 | Drum brake for electric automobile |
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| Country | Link |
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| CN (1) | CN215257528U (en) |
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2021
- 2021-06-02 CN CN202121229504.2U patent/CN215257528U/en active Active
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