CN105090285B

CN105090285B - Sliding and rotating brake cam assembly of motor vehicle and matched shoe palm thereof

Info

Publication number: CN105090285B
Application number: CN201410430564.9A
Authority: CN
Inventors: 董仲国
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-15
Filing date: 2014-08-19
Publication date: 2021-06-25
Anticipated expiration: 2034-08-19
Also published as: CN105090285A

Abstract

The invention discloses a sliding-rotating brake cam assembly of a motor vehicle and a matched straight groove shoe palm, and relates to a brake vehicle with a cam shaft. The existing vehicle is provided with a novel brake cam assembly for solving the problems of unreasonable camshaft and poor braking, and the novel brake cam assembly comprises a brake knob shaft, a chute cam block, an inner pressing plate, an outer pressing plate, a return spring, a screw locking plate, a matched straight chute shoe palm, an optimized combination and a whole set of brake system. The core technology is that when the assembly brakes, the brake knob shaft twists the chute cam block, the chute cam block rotates and slides through the preset chute, the center line of the cam block is automatically adjusted and changed in real time according to the abrasion change degree of accessories, two working surfaces of the cam block can not interfere with each other and are pushed to rise outwards averagely, and the maximum friction pressure generated by the shoe palm is respectively pushed to complete the braking process. Compared with the traditional product, the brake is better, the qualified brake effect has long service life, accords with the mechanical motion law, and is used for effectively shortening the brake distance of the vehicle brake, reducing the accident rate, prolonging the service life of accessories and reducing the maintenance cost.

Description

Sliding and rotating brake cam assembly of motor vehicle and matched shoe palm thereof

Technical Field

The technology relates to vehicles braked by all air pressure camshaft type, including motorcycles, tricycles and electric motor car hand brakes braked by the camshaft type, various engineering vehicles and trailers.

Background

The invention of human beings creates the automobile for now over a hundred years, the use of the automobile greatly contributes to the society, and the use amount is increased day by day and becomes a necessity. The department of transportation makes statistics of 7800 thousands of vehicles used by people in China. The goods train 1300 has a large number of goods, such as passenger cars, buses, three-wheels, motorcycles, electric cars and other vehicles, which is difficult to count, and the use amount is huge. Bring economic benefits to human beings, and also inevitably cause a plurality of traffic accidents. According to statistics, the casualties caused by traffic accidents in China are more than hundreds of thousands of people every year, and a large amount of property is lost. Some of these accidents are caused by poor braking of the vehicle. The main reasons are maintenance inadequacies and design deficiencies that have not improved for centuries. The current state of the art for motor vehicles is reaching a high-end level by human intelligent manufacturing technology. The braking of the brake creates a plurality of types. Comprises a mechanical pull rod type (such as a motorcycle) vacuum boosting oil pressure type (such as a trolley) air pressure boosting oil pressure type (such as Mitsubishi Isuzu) air pressure cam shaft type (such as Dongfeng liberation). Most of the braking effect is ideal. The brake system has the advantages that the brake system is not capable of keeping a stable brake effect all the time in the service life of accessories, the service life of the qualified brake effect is short, design manufacturers of various countries of various factories are diligent, and various improvements such as widening of the area of a brake palm (high temperature is easy to generate when a bearing is out of regulation, fire is easy to generate when the bearing is serious), increasing of pressure of a branch pump and the like (understood from an objective law of mechanical movement that the brake difference is unreasonable in design, unbalanced in force application angle, not in place in a direction force point and small in friction pressure, but overlarge expansion force is generated due to overlarge pressure, large side effect is generated, and a brake disc works in a high-temperature and water-logging alternately severe environment, and is easy to burst and fly out to cause self-injury and endanger others) are achieved. Although the effect is slightly superior, the effect is still far from ideal, and no prescription for disease root and symptom is found so far. Is a worldwide problem which is not solved all the time. For years, a set of experience has been accumulated in work for understanding, exploring, finding and researching the automobile performance, and on the basis of the prior art, the work responsibility requiring more strict work is taken as a standard, and particularly, long-term research is carried out on the air pressure cam shaft type braking system of the automobile, and the results are obtained. According to the problems encountered and found in the working experience, namely the defect symptom of the braking system, a high-efficiency camshaft type braking assembly of the motor vehicle is successfully designed and manufactured after a plurality of researches, amendments and verifications, the blank of the system is filled, the design defects of a plurality of years are overcome, and the efforts are made for improving the performance of the vehicle and reducing the accident rate.

The problem of cam braking is explained, the current situation of the industry background is analyzed, the layout of the existing wheel shaft is analyzed, a left rear wheel figure 15 is taken as an example, the components are assumed to be distributed in a clock expression mode, a brake disc rotates anticlockwise, and two fixing pins are arranged at the position of a bottom plate 9 and are respectively arranged on upper and lower brake shoe palms in semicircular mode. The fixed brake camshaft is arranged at the 3-point position, when the brake cylinder pushes the rotary brake, the camshaft rotates clockwise to work, and the brake cam has two forms: the appearance is square cam and S-shaped cam. The shaft and the cam are cast into a whole, which has become a common problem in the world for many years, the defect of the traditional design causes the root of poor braking effect, when in work braking, the cam shaft is fixed and rotates to drive the cam working surface to rotate towards the equal average arc shape in the upper and lower directions (rear wheels) or the left and right directions (front wheels) and outwards jack up, the two shoe palms are pushed to generate friction, the brake disc is prevented from rotating, and the braking effect is generated to complete the whole working process. The vehicle advances when moving in one direction most of the time. The upper half part of the wheel disc turns from right to left, and the lower half part turns from left to right, which is caused by an objective rule. When braking, the upper shoe palm and the lower shoe palm move forwards or backwards under the action of a cam, the friction force of a brake disc in the rotating direction is different in magnitude, the abrasion degree of accessories is changed along with the change of the abrasion degree, due to the fixation of a traditional cam, the upper shoe palm is pushed upwards with great friction force against the rotating force and is abraded quickly, the lower shoe palm is pushed upwards along the tail of the rotating direction force, the friction force is small, the abrasion is relatively slow, after a wheel shaft works for a certain time, the two shoe palms are abraded differently, under the action of the gravity of a vehicle, a shaft and the brake disc are not at the same central point, the braking difference is long, the high-temperature expansion is realized, the shoe palms are carbonized, the radius is unbalanced, the movement gap between the shoe palms and the disc is different or is not adjusted, and the like, due to the design defect that the traditional cam shaft is cast into a whole, the abrasion is slow, the lower shoe palm with small friction force restricts the outwards pushing force of the upper shoe, namely the, the braking effect is tired, so the reason of poor braking effect is that the design defect of the automobile is also the violent accident with multiple accidents, the long braking distance or failure causes the serious accidents of collision, rear-end collision and the like, the harm is brought to the automobile, and people are hurt, so the hidden danger is eliminated.

Disclosure of Invention

The invention aims to improve the performance of the automobile, reduce the accident rate and save life and property loss. The invention relates to a sliding-rotating brake cam assembly of a motor vehicle and a matched straight groove shoe palm, which is shown in figure 1 and comprises the following components: braking a torsion shaft as shown in FIG. 2; the chute cam block is as shown in figure 3; a built-in return spring is shown in figure 5; fourthly, the outer pressing plate is shown in figure 4; the screw and the locking plate are shown in figure 6 and figure 7; sixthly, the hoof palm with the straight groove is shown in figure 14; the matched hoof sole plate is shown in figure 13; the torque shaft is fixedly connected with the thrust of the slave cylinder, one end of the shaft and one end of the slave cylinder are designed to work in a spline connection mode, the other end of the shaft and the other end of the slave cylinder are connected with the cam block in a matching mode, and the shaft is designed to be rectangular to increase the torque force and prolong the service life to create conditions for sliding. The cam block is approximately square in figure 3, taking clockwise as an example, the cam block is transversely arranged, the upper plane and the lower plane are contacted with the hoof palm to be in a static state, when the cam block marks a cross center line, the left upper part and the right lower part of the center form a top rotating working surface of the cam block in a parabola shape, the right upper part and the left lower part of the center are hollowed under the condition of ensuring the strength, the weight is reduced, and the material is saved, the core function of the assembly is to design a hollowed inclined sliding groove which is wider than a knob shaft on the cross center line of the cam block, the sliding groove is preset to be inclined at 40 degrees along the rotating direction with the horizontal line of the center, the height is matched with the knob shaft so as to facilitate the knob work, the two ends of the inclined groove and the residual cavities of the 8 sliding chutes in figure 15 are convenient to slide along with the abrasion of accessories when the cam block works, the grease is stored so as to enhance the sliding surface and rust prevention and, prevent the hoof palm from causing the cam block to polish outwards because of the ineffectiveness of the sludge rust spring. The outer pressing plate screw locking plate plays a role in sealing and fixing.

Drawings

The sliding-rotating brake cam assembly of the motor vehicle and the matched straight-groove shoe palm created by the set of technology have 4 sets of schemes and matched straight-groove shoe palms and shoe palm bottom plates. The hand brake parking system is suitable for motorcycles, electric vehicles, tricycles and various vehicles. The various designs have different appearances and consistent functions and are optional. The design of the scheme (I) has the characteristics of easy manufacture, low cost and convenient maintenance. The best effect of design can be achieved by a common technician as long as the installation is correct, and the sequence of the names of the attached drawings is as follows: FIG. 1 is a schematic view of a motor vehicle sliding and rotating brake cam assembly; FIG. 2, brake torque shaft; FIG. 3, a chute cam block; FIG. 4, outer platen; FIG. 5, a return spring; FIG. 6, locking plate; FIG. 7, a screw; FIG. 8, brake knob shaft; FIG. 9, brake knob shaft; FIG. 10, outer platen; FIG. 11, a dual bore chute cam block; FIG. 12 illustrates an S-shaped sliding and rotating brake cam assembly and a wheel shoe; FIG. 13, a mating straight slot shoe sole plate; fig. 14, straight slotted shoe soles; FIG. 15 shows a sliding-rotating brake cam assembly and a mating straight shoe palm of a motor vehicle; FIG. 16, a sliding and rotating brake cam assembly; FIG. 17, brake knob shaft; fig. 18, chute cam block; figure 19, pressure plate and locking pin. In addition, the abstract attached drawing is a motor vehicle sliding-rotating brake cam assembly and a matched straight groove shoe palm: 1, a bottom plate in the abstract attached drawing; 2. a fixing pin; 3. A straight-grooved hoof palm; 4. a return spring; 5. a sliding and rotating brake cam assembly; 6. adjusting an eccentric wheel; 7. brake shoe; 8. a sliding chute cavity. The installation position and the main characteristics of each accessory can be systematically and visually represented. FIGS. 1 to 7 show a scheme (i); FIG. 7 FIGS. 8 to 11 are schematic views (diagrammatic views); FIG. 12 shows a scheme (diagram); fig. 16 is a scheme (iv), and a set of assemblies is formed by combining fig. 17 to fig. 19. The description only explains the structure, the working principle and the characteristics of the scheme I. The assembly can be manufactured according to the sizes of various vehicle types and the size, and the working surface of the matched hoof palm also needs to be correspondingly arranged. For the brief description: fig. 1, brake torque shaft 1; 2. a chute cam block; 3. a return spring is arranged in the shell; 4. an inner pressure plate; 5. an outer pressing plate; 6. screws and locking plates. Fig. 2, 1, brake torque shaft; 2. a spring hole; 3. an inner pressing plate. Brake torque shaft, 1 in fig. 9; 2. and (4) screw holes. The 1, S-cam assembly of fig. 12; 2. a wheel-type hoof palm; 3. a fixing pin; 4. adjusting an eccentric wheel; 5. brake shoe; 6. a sliding chute cavity. Fig. 13, 1, shoe sole plate; 2. adjusting eccentric wheels for the hoof palm; 3. a base plate screw hole; 4. a cam assembly trepanning; 5. the hoof palm fixing pin. Brake shoe 1 in fig. 14; 2. a hoof palm; 3. a fixing pin hole; 4. straight groove hoof palm working face. 1, bottom plate in fig. 15; 2. a fixing pin; 3. a straight-grooved hoof palm; 4. a return spring; 5. a sliding and rotating brake cam assembly; 6. adjusting eccentric wheel, 7 brake shoe, 8 sliding chute cavity. The application range is suitable for motorcycles, electric vehicles, tricycles, agricultural vehicles, large and small passenger cars, large and small trucks, trailers and all camshaft type braking engineering vehicles.

Detailed Description

The working principle shows that the cam block has a sliding function, when the assembly is applied, the adjusting eccentric wheel is arranged at the waist part of the two hoof palms, namely the bottom plate, and the diameter and the clearance distance of the hoof palms are controlled by matching with the return spring, so that the hoof palms are prevented from being thrown downwards when the cam block is static to generate resistance and high temperature, the working surface of the hoof palms is provided with a straight groove which is equivalent to the thickness of the cam block for matching use, and the hoof palms are kept stable in. During working and braking, the two parts are matched to contact and roll, the outward rotating and pushing part is the core function of the cam block, and when the cam block is static, the rotating and twisting shaft and the cam block are in a preset state of inclining by 40 degrees along the rotating direction. When the brake is in work, the assembly is pushed outwards in two directions to push the shoe palm, and the brake disc is rubbed to generate a braking effect. The assembly can automatically and correctly adjust the working surface of the sliding cam block to be expanded outwards in real time according to the real-time changing sizes of the wheel shaft and the brake disc, so that the two shoe soles are pushed, the expansion forces at the two ends are not interfered with each other, the shoe soles are pushed to generate friction force at the maximum, the quick and effective braking effect is achieved, and the braking distance is shortened. The strong braking effect can lead the vehicle running at high speed and violating and overloading to stop stably in the shortest time and the shortest distance. When the vehicle advances, the upper shoe palm exerts the maximum friction force, when the vehicle backs, the lower shoe palm has the maximum friction force, and the best braking effect is achieved when the vehicle advances or backs, and the brake has the characteristics of short braking time, no high temperature and the like: firstly, the whole vehicle is installed and used, four-wheel brake balance cannot deviate, all defect causes are easily solved compared with the traditional product, and a turning-over phenomenon is created late; secondly, the spaces at the two ends of the cam block are respectively temporarily provided with a residual reasonable cavity, according to the test result of installation and use for a period of time, the vehicle moves forward more, the friction force of the upper shoe palm is large, the brake lining is worn quickly, and the wear speed is about fifty percent faster than that of the brake lining of the lower shoe palm. If the cam block slides to the end of the other end when braking, a shoe palm gasket is recommended to be used or shoe palms with uniform sizes are manufactured, so that the shoe palms can be subjected to up-and-down intermodulation during secondary maintenance, and the shoe palms are continuously used to the limit of brake linings after being installed, thereby improving the utilization rate of the brake linings. The top ends of the two cams which rotate from the static state to the inclined state by 40 degrees to 120 degrees are working ranges, in addition, when the pneumatic cylinder is braked, the best purpose can be achieved as long as reasonable air pressure pushing is carried out on the pneumatic cylinder, and the safety of a pneumatic pipeline is ensured. Although the innovation is small, the effect is huge, the influence is profound, and the automobile grade can be improved to push the automobile manufacturing industry of China to go to the first floor. The performance in the industry is best, the technology is advanced, the economic benefit is achieved, when the technology is applied, the vehicle performance can be improved, the service life of accessories is prolonged, manual boring is not needed during vehicle maintenance, the accessories can automatically run in after being correctly installed, the accessory utilization rate is improved, energy is saved, consumption is reduced, the secondary maintenance period is prolonged, the maintenance cost is reduced, and the attendance rate is improved.

Claims

1. A motor vehicle sliding and rotating brake cam assembly is characterized by comprising a brake knob shaft, a cam block, an outer pressing plate, a return spring, a locking plate and a screw, wherein the brake knob shaft and one end of a cylinder are connected with a spline; the other end is connected with the cam block in a matching way; planes are arranged above and below the cam block, the left upper part and the right lower part of the center of the cam block form a cam block rotary jacking working surface in a parabola form, hollowed grooves are formed in the right upper part and the left lower part of the center of the cam block, an inclined groove is designed in the center of the cam block, the inclined groove is preset to be 40 degrees inclined along the rotation direction by using a central horizontal line, the width of the inclined groove is larger than that of a knob shaft, spaces are reserved at two ends of the inclined groove, and the height of the inclined groove is matched with that of a rotary torsion shaft; the cam block is characterized in that a mounting return spring is arranged on one side of the inner side of the rotating shaft, an inner pressing plate and an outer pressing plate are respectively arranged on the inner side and the outer side of the cam block, and a locking plate and a screw are arranged on the outer side of the outer pressing plate.

2. A motor vehicle sliding and rotating brake cam assembly is characterized by comprising a brake knob shaft, a cam block, an outer pressing plate, a return spring, a locking plate and a screw, wherein the brake knob shaft and one end of a cylinder are connected with a spline; the other end is connected with the cam block in a matching way; the upper part and the lower part of the center of the cam block are provided with hollowed grooves, the center of the cam block is provided with an inclined groove, the inclined groove is preset to be 40 degrees inclined along the rotation direction by a central horizontal line, the width of the inclined groove is larger than that of a knob shaft, two ends of the inclined groove are respectively provided with a remaining space, the height of the inclined groove is matched with that of the rotation torsion shaft, and the middle part of the inclined groove of the cam block is divided to form a double-hole structure; the cam block is characterized in that a mounting return spring is arranged on one side of the inner side of the rotating shaft, an inner pressing plate and an outer pressing plate are respectively arranged on the inner side and the outer side of the cam block, and a locking plate and a screw are arranged on the outer side of the outer pressing plate.

3. The matched shoe palm of the motor vehicle sliding-rotating brake cam assembly according to any one of claims 1 or 2, wherein the motor vehicle sliding-rotating brake cam assembly is an S-shaped sliding-rotating brake cam assembly, and the matched shoe palm comprises a wheel-type shoe palm, a fixed pin, an adjusting eccentric wheel, a shoe palm bottom plate, a bottom plate screw hole and a cam assembly sleeve hole; the two wheel-type shoe soles are arranged on a shoe sole bottom plate in an arc shape, fixing pins for separately mounting the upper shoe sole and the lower shoe sole are arranged on the shoe sole bottom plate, an adjusting eccentric wheel is arranged on the shoe sole bottom plate at the waist part of the two shoe soles, a bottom plate screw hole is arranged around the center of the shoe sole bottom plate, a cam assembly sleeve hole is further arranged on the shoe sole bottom plate, a brake cam assembly is fixed to the shoe sole bottom plate through the cam assembly sleeve hole, and rollers of the two wheel-type shoe soles are abutted to a cam block working surface in the brake cam assembly.

4. The shoe palm of any one of claims 1 or 2, wherein the shoe palm comprises a straight groove shoe palm, a shoe palm base plate, a fixing pin, a return spring and an adjusting eccentric; the two straight-groove type hoof palms are arranged on the hoof palm bottom plate in an arc shape and are oppositely arranged, the hoof palm bottom plate is provided with a fixing pin for separately mounting the upper and lower hoof palms, an adjusting eccentric wheel is arranged on the two hoof palm waist bottom plate, a straight groove with the thickness equivalent to that of a cam block is designed on the working surface of each straight-groove type hoof palm, and the opposite sides of the two straight-groove type hoof palms are connected with return springs.