Electric control mechanical brake capable of eliminating transmission clearance

Abstract

The utility model provides an electric control mechanical brake for eliminating transmission clearance, which comprises a caliper body, a middle shell connected with the caliper body, an outer shell connected with one side of the middle shell far away from the caliper body, a motor connected with one side of the middle shell close to the caliper body, a motor shaft of the motor penetrating through the middle shell, and a driving gear connected with one side of the motor shaft close to the outer shell. The side, close to the outer shell, of the middle shell is connected with an idle gear and a planetary gear mechanism. The driving gear is meshed with the idle gear, and the idle gear is meshed with the planetary gear mechanism. The idle gear is coaxially connected with a compensation device, and the compensation device eliminates the meshing clearance between the idle gear and the driving gear. The compensating device is arranged at the idle gear to eliminate the meshing clearance, so that the whole gear mechanism is compact in structure, the braking response time is shortened, the braking response is sensitive, the influence of the gear clearance on the braking distance is avoided, and the driving safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the vehicle technical field, specifically relates to a kind of electric control mechanical brake of eliminating transmission gap. BACKGROUND

[0002] Electronic mechanical brake, abbreviated as EMB (Electro Mechanical Brake), its working principle is as follows: in clamping process, the torque generated by motor is transmitted to ball screw via drive assembly, ball screw converts the rotary motion of motor into linear motion, and then pushes brake pad to brake disc and clamps, so as to prevent wheel rotation, realize the deceleration of vehicle and even parking stop. When brake needs to be released, brake pad returns to initial position to maintain appropriate disc gap between brake disc and brake pad. The size of disc gap cannot be ignored, if the gap is too small, brake pad is prone to contact with brake disc, which causes drag phenomenon, so that vehicle energy is wasted. On the contrary, if disc gap is too large, brake stroke will be extended, which will lead to slow brake response, directly affect brake distance and bring hidden danger to driving safety.

[0003] Patent CN107076237B proposes a kind of electromechanical brake caliper, piston is directly pushed by using motion conversion mechanism, nut and piston are fixed together through retainer, when brake is released, nut drives piston to return together, disc gap can be directly controlled. The problem of this mode is that: because there is gap between parts of transmission mechanism, such as gear meshing gap, bearing gap and other transmission parts, the control precision of piston return amount is difficult to guarantee, the gap needs to be eliminated before brake works, so that brake can clamp or release, therefore, actual brake or release will have certain delay, which leads to unable to accurately control the position of brake pad, and the impact sound caused by eliminating gap, and transmission gap may cause parts to shake and collide during vehicle driving, thus producing driving abnormal sound.

[0004] Patent CN218063174U eliminates transmission gap by increasing energy storage mechanism in transmission mechanism, but energy storage mechanism increases the load of motor, which leads to part of kinetic energy of motor being converted into energy of energy storage mechanism, reducing the transmission efficiency of brake.

[0005] Therefore, the above problems need to be solved. CONTENT OF UTILITY MODEL

[0006] PURPOSE OF UTILITY: In order to overcome the above shortcomings, the utility provides a kind of electric control mechanical brake of eliminating transmission gap, which can eliminate gear gap, accurately control disc gap, avoid long brake stroke, improve brake response speed, shorten brake distance and improve driving safety.

[0007] Technical solution: In order to achieve the above-mentioned purpose, the utility provides an electric control mechanical brake for eliminating transmission gap, which comprises a caliper body, the caliper body is connected with a middle shell, the middle shell is connected with an outer shell away from the caliper body, the middle shell is connected with a motor close to the caliper body, the motor shaft of the motor passes through the middle shell, the motor shaft of the motor is connected with a driving gear close to the outer shell, the middle shell is connected with an idle gear and a planetary gear mechanism close to the outer shell. The driving gear and the idle gear are meshed and connected, and the idle gear and the planetary gear mechanism are meshed and connected. The idle gear is coaxially connected with a compensation device, and the compensation device eliminates the meshing gap between the idle gear and the driving gear. The utility drives the idle gear to rotate through the driving gear of the motor, the idle gear drives the planetary gear mechanism to rotate, and then drives the ball screw provided in the caliper body to rotate, and the ball screw pushes the brake pad to clamp the brake disc. The compensation device is arranged at the idle gear to eliminate the meshing gap between the idle gear and the driving gear and the planetary gear mechanism, so that the whole gear mechanism structure is compact, when braking, the rotation of the motor shaft of the motor can be transmitted to the brake pad in time, the braking response time is shortened, the braking reaction is sensitive, the influence of gear gap on braking distance is avoided, and the driving safety is improved. At the same time, the meshing gap between the idle gear and the driving gear and the planetary gear mechanism is eliminated, and then the disc gap can be accurately controlled, the drag phenomenon is avoided, and the disc gap influence on braking stroke is avoided.

[0008] Further, in the above-mentioned electric control mechanical brake for eliminating transmission gap, the compensation device comprises a toothed sheet, the teeth of the toothed sheet are arranged in the same way as the idle gear, and the teeth of the toothed sheet and the idle gear are designed to be staggered. When meshing, the toothed sheet will first mesh with the driving gear and the planetary gear mechanism, and then the idle gear will mesh. The toothed sheet eliminates the meshing gap of the idle gear, ensures accurate transmission, ensures sensitive braking, and improves driving safety.

[0009] Further, in the above-mentioned electric control mechanical brake for eliminating transmission gap, the idle gear is provided as a helical gear, and the toothed sheet is provided as a corresponding helical gear. The teeth of the helical gear are arranged along the axis in a spiral manner, and in the meshing process, the teeth gradually enter and exit, making the transmission more stable, the vibration and noise smaller, and the meshing gap smaller.

[0010] Further, in the above-mentioned electric control mechanical brake for eliminating transmission gap, a groove is arranged on the side of the idle gear close to the toothed sheet. The toothed sheet is connected with a pin close to the idle gear, the pin and the groove are arranged correspondingly, and the pin is inserted into the groove. The toothed sheet and the idle gear are connected through the pin and the groove, which ensures the connection accuracy of the two, eliminates the gear gap, and improves the structural stability.

[0011] Further, the above-mentioned electric control mechanical brake for eliminating transmission gap, the pin post is sleeved with a flexible sleeve, and the pin post is clamped in the slot hole through the flexible sleeve. When the tooth piece is pressed, the flexible sleeve is deformed, the tooth piece is flexibly engaged with the driving gear and the planetary gear mechanism, the tooth piece has a certain displacement space, the gap can be completely eliminated, the transmission noise and vibration are eliminated, and the braking sensitivity is improved.

[0012] Further, the above-mentioned electric control mechanical brake for eliminating transmission gap, the flexible sleeve is made of rubber. The rubber has good elasticity, wear resistance and corrosion resistance, and can meet the requirement of eliminating the gap.

[0013] Further, the above-mentioned electric control mechanical brake for eliminating transmission gap, the idler gear is connected between the middle shell and the outer shell through an idler shaft, the tooth piece is provided with a positioning ring on the side close to the outer shell, and the idler shaft penetrates through the positioning ring. The tooth piece is provided with the positioning ring, the connection strength of the tooth piece and the idler shaft is improved, the tooth piece is prevented from being deformed due to excessive force, the contact nubs of the tooth piece and the idler shaft are increased, and the wear of the tooth piece and the idler shaft is reduced.

[0014] Further, the above-mentioned electric control mechanical brake for eliminating transmission gap, the planetary gear mechanism comprises a big gear, and the big gear is connected to the side of the middle shell close to the outer shell through a big retainer. The big gear is integrally connected with a sun gear, the side of the big gear close to the middle shell is provided with a planetary gear, the planetary gear is connected to a planetary gear retainer, the planetary gear retainer is connected to the middle shell, and the planetary gear is engaged with the outside of the sun gear connected with the big gear. The outside of the planetary gear is provided with a ring gear, and the planetary gear and the ring gear are engaged. The caliper body is provided with an input gear, and the input gear is splined connected with the planetary gear retainer. The planetary gear mechanism has compact structure, large transmission ratio and large load capacity, and can meet the requirement of large braking force output.

[0015] Further, the above-mentioned electric control mechanical brake for eliminating transmission gap, the big retainer is provided with a support part, and the end of the idler shaft away from the caliper body is connected to the support part. The support part is provided to shorten the length of the idler shaft, enhance the structural strength of the idler shaft, prevent the deformation of the idler shaft, and meet the requirement of large braking force output.

[0016] Further, the above-mentioned electric control mechanical brake for eliminating transmission gap, the caliper body is connected with a support.

[0017] The utility model discloses an electric control mechanical brake eliminating transmission gap has the advantages of the following: the utility model discloses an electric control mechanical brake eliminating transmission gap, sets up compensating device to eliminate idle gear and driving gear, idle gear and planetary gear mechanism meshing gap at idle gear, makes the whole gear mechanism structure compact, when braking, can in time with the rotation of motor shaft of motor is transmitted to brake pad, shortens the brake response time, and the brake reaction is sensitive, avoids the influence of gear gap to braking distance, improves the driving safety. Simultaneously eliminate the meshing gap of gear and driving gear, planetary gear mechanism can control the disc gap accurately, avoid the phenomenon of lag, avoid the disc gap influence brake stroke. The tooth piece and idle gear are designed to be staggered, when engaging, the tooth piece is first engaged in the driving gear and the planetary gear mechanism, and then the idle gear is engaged. The tooth piece eliminates the meshing gap of the idle gear, ensures accurate transmission, ensures sensitive braking, and improves driving safety. The flexible sleeve is provided, the tooth piece is flexibly engaged in the driving gear and the planetary gear mechanism, the tooth piece has a certain displacement space, which can ensure that the gap is completely eliminated, eliminate transmission noise and vibration, and improve the sensitivity of braking. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is an explosion map of the utility model discloses an electric control mechanical brake eliminating transmission gap;

[0019] Figure 2 It is an explosion map of the utility model discloses an electric control mechanical brake eliminating transmission gap;

[0020] Figure 3 It is an explosion map of the utility model discloses an electric control mechanical brake eliminating transmission gap;

[0021] Figure 4 It is a top view of the utility model discloses an electric control mechanical brake eliminating transmission gap;

[0022] Figure 5 It is an explosion schematic view of the utility model discloses an electric control mechanical brake eliminating transmission gap.

[0023] In the drawing: 1, caliper body, 11, input gear, 2, middle shell, 3, outer shell, 4, motor, 5, driving gear, 6, idle gear, 61, slot hole, 62, idle gear shaft, 7, planetary gear mechanism, 71, big gear, 72, big retainer, 721, support part, 73, planet wheel, 74, planet wheel retainer, 75, gear ring, 8, compensating device, 81, tooth piece, 811, positioning ring, 82, pin column, 83, flexible sleeve, 9, support. DETAILED DESCRIPTION

[0024] Example 1

[0025] As Figure 1The utility model provides an eliminate transmission gap's electric control mechanical brake, including the caliper body 1, the caliper body 1 is connected with middle casing 2, and the middle casing 2 is connected with outer casing 3 on the side away from the caliper body 1, and the middle casing 2 is connected with motor 4 on the side close to the caliper body 1, and the motor shaft of motor 4 passes through the middle casing 2, and the motor shaft of motor 4 is connected with drive gear 5 on the side close to outer casing 3, and the middle casing 2 is connected with idler gear 6 and planetary gear mechanism 7 on the side close to outer casing 3. Drive gear 5 and idler gear 6 are engagedly connected, and idler gear 6 and planetary gear mechanism 7 are engagedly connected. Idler gear 6 is coaxially connected with compensation device 8, and compensation device 8 eliminates the meshing gap of idler gear 6 and drive gear 5. The utility model discloses a motor 4 drives idler gear 6 to rotate through drive gear 5, and idler gear 6 drives planetary gear mechanism 7 to rotate, and then drives the ball screw provided in the caliper body 1 to rotate, and the ball screw pushes the brake pad to clamp the brake disc. The caliper body 1 is connected with support 9.

[0026] As Figures 2-4 The utility model provides an eliminate transmission gap's electric control mechanical brake, and compensation device 8 includes tooth sheet 81, and the same setting of tooth is equipped with idler gear 6, and the tooth of tooth sheet 81 and idler gear 6 are designed to be wrong tooth. Idler gear 6 is provided as a helical gear, and tooth sheet 81 is provided as a corresponding helical gear of idler gear 6. The tooth of helical gear is spirally arranged along the axis. Idler gear 6 is provided with a groove 61 on the side close to tooth sheet 81. Tooth sheet 81 is connected with pin column 82 on the side close to idler gear 6, and pin column 82 and groove 61 are correspondingly arranged, and pin column 82 is inserted into groove 61. Pin column 82 is sleeved with flexible sleeve 83, and pin column 82 is clamped in groove 61 through flexible sleeve 83. The material of flexible sleeve 83 is rubber.

[0027] As Figure 5 The utility model provides an eliminate transmission gap's electric control mechanical brake, and idler gear 6 is connected between middle casing 2 and outer casing 3 through idler shaft 62, and tooth sheet 81 is provided with positioning ring 811 on the side close to outer casing 3, and idler shaft 62 passes through positioning ring 811. Planetary gear mechanism 7 includes big gear 71, and big gear 71 is connected on the side close to outer casing 3 of middle casing 2 through big retainer 72. Big gear 71 is integrally connected with sun gear, and big gear 71 is provided with planetary gear 73 on the side close to middle casing 2, and planetary gear 73 is connected on planetary gear retainer 74, and planetary gear retainer 74 is connected on middle casing 2, and planetary gear 73 is engaged on the outside of sun gear connected with big gear 71. The outside of planetary gear 73 is provided with gear ring 75, and planetary gear 73 and gear ring 75 are engaged. Caliper body 1 is provided with input gear 11 (see Figure 1 ), and input gear 11 is spline-connected with planetary gear retainer 74. Big retainer 72 is provided with support part 721, and idler shaft 62 is connected on the end away from caliper body 1 of support part 721.

[0028] The above examples are exemplary, and the purpose is to illustrate the technical concept and characteristics of the utility model, so that the person skilled in the art can understand the content of the utility model and implement it, and cannot limit the protection scope of the utility model. Any equivalent changes or modifications made in accordance with the spirit of the utility model shall be covered within the protection scope of the utility model.

Claims

1. An electrically controlled mechanical brake for eliminating a transmission gap, characterized by: The application relates to a caliper body (1) connected with a middle shell (2), the side of the middle shell (2) far from the caliper body (1) is connected with an outer shell (3), the side of the middle shell (2) close to the caliper body (1) is connected with a motor (4), the motor shaft of the motor (4) penetrates through the middle shell (2), the motor shaft of the motor (4) is connected with a driving gear (5) on the side close to the outer shell (3), the side of the middle shell (2) close to the outer shell (3) is connected with an idle gear (6) and a planetary gear mechanism (7); the driving gear (5) and the idle gear (6) are meshed and connected, the idle gear (6) and the planetary gear mechanism (7) are meshed and connected; the idle gear (6) is coaxially connected with a compensation device (8), the compensation device (8) eliminates the meshing gap between the idle gear (6) and the driving gear (5).

2. The electrically controlled mechanical brake that eliminates the driving gap according to claim 1, characterized in that: The compensation device (8) comprises a toothed sheet (81), the teeth of the toothed sheet (81) are arranged in the same way as the idle gear (6), and the teeth of the toothed sheet (81) and the idle gear (6) are designed to be staggered.

3. The electrically controlled mechanical brake that eliminates the driving gap according to claim 2, characterized in that: The idle gear (6) is an inclined gear, and the toothed sheet (81) is also an inclined gear corresponding to the idle gear (6).

4. The electrically controlled mechanical brake that eliminates the driving gap according to claim 2, characterized in that: The side of the idle gear (6) close to the toothed sheet (81) is provided with a slot hole (61); the side of the toothed sheet (81) close to the idle gear (6) is connected with a pin column (82), the pin column (82) and the slot hole (61) are arranged correspondingly, and the pin column (82) penetrates into the slot hole (61).

5. The electrically controlled mechanical brake that eliminates the driving gap according to claim 4, characterized in that: The pin column (82) is sleeved with a flexible sleeve (83), and the pin column (82) is clamped in the slot hole (61) through the flexible sleeve (83).

6. The electrically controlled mechanical brake that eliminates the driving gap according to claim 5, characterized in that: The flexible sleeve (83) is made of rubber.

7. The electrically controlled mechanical brake that eliminates the driving gap according to claim 2, characterized in that: The idle gear (6) is connected between the middle shell (2) and the outer shell (3) through an idle gear shaft (62), the side of the toothed sheet (81) close to the outer shell (3) is provided with a positioning ring (811), and the idle gear shaft (62) penetrates through the positioning ring (811).

8. The electrically controlled mechanical brake that eliminates the driving gap according to claim 7, characterized in that: The planetary gear mechanism (7) comprises a big gear (71), the big gear (71) is connected to the side of the middle shell (2) close to the outer shell (3) through a big retainer (72); the big gear (71) is integrally connected with a sun gear, the side of the big gear (71) close to the middle shell (2) is provided with a planetary gear (73), the planetary gear (73) is connected to a planetary gear retainer (74), the planetary gear retainer (74) is connected to the middle shell (2), and the planetary gear (73) is meshed on the outside of the sun gear connected with the big gear (71); the outside of the planetary gear (73) is provided with a ring gear (75), and the planetary gear (73) and the ring gear (75) are meshed; the caliper body (1) is provided with an input gear (11), and the input gear (11) and the planetary gear retainer (74) are spline-connected.

9. The electrically controlled mechanical brake that eliminates the driving gap according to claim 8, characterized in that: The big retainer (72) is provided with a supporting portion (721), and the end of the idle gear shaft (62) far from the caliper body (1) is connected to the supporting portion (721).

10. The electrically controlled mechanical brake that eliminates the driving gap according to claim 1, characterized in that: The caliper body (1) is connected with a support (9).

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