Vehicle braking resistance generating device

Abstract

The utility model relates to the technical field of vehicle braking, and discloses a vehicle braking resistance generating device which comprises a first motor, a hydraulic control valve block, a cylinder barrel, a cover cap, a piston assembly, a first sealing ring, a second sealing ring and a third sealing ring. The small end section of the nut is fixed with the motor rotor in a threaded mode, the first spigot end face of the nut is attached to the second spigot end face of the motor rotor, the first elastic check ring is clamped in a first annular groove formed in the motor rotor, one end of the first elastic check ring is attached to the large end face of the nut, the ball bearing is installed on the motor end cover, and the ball bearing is axially limited and fixed relative to the motor end cover. According to the vehicle braking resistance generating device, the nut of the ball screw pair and the motor rotor are combined in a torsion-resistant mode through the threads and are limited and fixed relative to the axial direction, and the braking resistance generating device can simplify the structure, is simple in structure and reduces cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle braking resistance technical field, concretely is a vehicle braking resistance generating device. BACKGROUND

[0002] At present, electric brake booster has been widely applied in traditional fuel vehicles, especially new energy vehicles, and compared with traditional vacuum booster, electric brake booster no longer needs vacuum source and completely relies on motor to provide brake boost, so it becomes an inevitable trend to replace vacuum booster, with the development of electrification and intelligent driving technology, intelligent integrated brake system becomes a new trend, which combines ABS / ESC and electric brake booster system to form OneBox scheme, which can realize the function of booster and also realize the function of anti-lock and vehicle stability control, and integrated brake booster mainly includes hydraulic control valve block, foot feeling simulator part, hydraulic generating device, control unit and sensor part and driving motor.

[0003] At present, the hydraulic generating device adopts planetary gear transmission + ball screw transmission (such as CN108290562B), and the basic principle is that the planetary gear realizes the speed reduction and torque increase of motor torque output, and then the ball screw realizes the conversion of the rotary motion of the gear into linear translation motion to push the piston to generate hydraulic pressure, and the current hydraulic generating device also adopts separate ball screw transmission (such as CN117818554A), and the basic principle is that the ball screw realizes the conversion of the rotary motion of the motor into linear translation motion to push the piston to generate hydraulic pressure.

[0004] The transmission mechanism of the hydraulic generating device is complex, the cost is relatively high, the nut or screw rod of the ball screw pair is rigidly connected with the piston, the assembly error of the ball screw and the motor can cause the piston and the cylinder body to be different in axis, and the piston or the cylinder body is worn. UTILITY MODEL CONTENTS

[0005] (I) Technical problems to be solved

[0006] The utility model aims at providing a vehicle braking resistance generating device to solve the problems of complex transmission mechanism of the hydraulic generating device, relatively high cost, rigid connection of the nut or screw rod of the ball screw pair with the piston, assembly error of the ball screw and the motor, different axis of the piston and the cylinder body, and wear of the piston or the cylinder body in the above background technology.

[0007] (2) Technical solutions

[0008] To achieve the above object, the utility model provides the following technical scheme: a vehicle braking resistance generating device, the vehicle braking resistance generating device includes motor one, hydraulic control valve block, cylinder, cover, piston assembly, sealing ring one, sealing ring two, sealing ring three, ball bearing, screw nut one, lead screw, anti -rotation sliding block, motor shell, anti -rotation sleeve, motor rotor, motor end cover, elastic baffle one, annular groove one, screw nut small head, stop end face one, stop end face two, screw nut big head end face, convex rail, guide groove, hydraulic chamber, oil channel one, oil channel two, sink groove, boss, piston, buffer pad, nut, elastic baffle two, annular groove two, polygonal surface one, polygonal surface two, the screw nut axial insertion is in the inner hole of motor rotor, and screw nut small head section is fixed with motor rotor thread, and the stop end face one of screw nut is pasted with the stop end face two of motor rotor, and elastic baffle one is clamped in the annular groove one of the motor rotor setting, and the one end of elastic baffle one is pasted with screw nut big head end face, and ball bearing is installed on the motor end cover, and ball bearing is axially limited fixed relative to the motor end cover, and motor rotor is installed in the inner hole of ball bearing, and motor rotor is axially limited fixed relative to ball bearing, and lead screw, screw nut and ball constitute ball screw pair, and anti -rotation sliding block is fixedly connected with one end of lead screw.

[0009] Preferably, the convex rail provided on the anti-rotation sleeve is in contact with the guide groove provided on the anti-rotation sliding block, the anti-rotation sliding block linearly slides in the anti-rotation sleeve, and there is no relative rotation between the two, the anti-rotation sleeve is axially inserted into the hole of the motor rotor, one end of the anti-rotation sleeve is fixed with the rear end of the motor shell, the motor one is bolted and fixedly connected with the hydraulic control valve block, the cylinder is axially inserted into the cylindrical hole of the hydraulic control valve block, the cylinder is provided with a boss embedded into the sink groove provided on the hydraulic control valve block, the cylinder is axially limited fixed relative to the hydraulic control valve block, the sealing ring three is installed between the cylinder and the hydraulic control valve block, the cover is sleeved on the front end of the cylinder, the open end of the cover is axially inserted into the cylindrical hole of the hydraulic control valve block, the cover is axially limited fixed, such as threaded connection, with the hydraulic control valve block, the sealing ring one is installed between the cover and the hydraulic control valve block, the piston, the buffer pad, the nut and the elastic baffle two constitute the piston assembly, the nut is threadedly fixedly connected with one end of the lead screw, the nut is installed in the polygonal counterbore of the piston, the polygonal surface two provided on the nut is matched with the polygonal surface one provided on the piston, the relative rotation of the piston and the nut is realized, and a design gap is left between the polygonal surface one and the polygonal surface two.

[0010] Preferably, the buffer pad is installed between the nut and the piston, the elastic baffle two is clamped in the annular groove two provided on the piston, the nut is limited from being taken out of the piston, the nut can axially and radially move relative to the piston, the sealing ring two is installed on the head of the piston, and the front end surface of the piston, the inner hole surface of the cylinder and the hole bottom surface of the cover constitute the hydraulic chamber.

[0011] Preferably, the outer cylindrical surface of the cylinder is connected with the inner hole surface of the cover and the inner hole surface of the hydraulic control valve block to form an oil passage two, the oil passage two is communicated with the hydraulic cavity and the oil passage one, and the motor is a power source for generating hydraulic pressure.

[0012] Preferably, the thread nut one is combined with the motor rotor in a torsion-resistant manner, the motor drives the thread nut to rotate, the thread nut drives the lead screw to perform linear translation, and the lead screw drives the piston assembly to perform reciprocating linear motion in the cylinder.

[0013] Preferably, the convex rail arranged on the anti-rotation sleeve limits rotation of the anti-rotation sliding block, so that the anti-rotation sliding block and the lead screw only perform linear motion.

[0014] Preferably, the motor shell is fixed with the anti-rotation sleeve in a torsion-resistant manner, rotation and axial movement of the anti-rotation sleeve are limited, the ball bearing supports and positions the motor rotor, and radial force and axial force generated during operation of the motor rotor are borne.

[0015] Compared with the prior art, the vehicle brake resistance generating device has the following beneficial effects:

[0016] 1. The vehicle brake resistance generating device, the thread nut of the ball screw pair is combined with the motor rotor in a torsion-resistant manner and is fixed in relative axial position limiting, the structure is simple, and the cost is reduced.

[0017] 2. The vehicle brake resistance generating device, the lead screw of the ball screw pair is flexibly connected with the piston, the lead screw can be radially offset relative to the piston, there is a buffer pad between the lead screw and the piston, and the wear problem caused by the misalignment of the piston and the cylinder is improved.

[0018] 3. The vehicle brake resistance generating device, the cylinder is inserted into the hydraulic control valve block in a penetrating manner, one end of the cylinder is an oil inlet and an oil outlet, the structure is simple, and the cost is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is a schematic structural view of a motor of the utility model;

[0020] Figure 2 It is a schematic structural view of a small head of a thread nut of the utility model;

[0021] Figure 3 It is a schematic structural view of a polygonal surface one of the utility model;

[0022] Figure 4 It is a schematic structural view of an oil passage two of the utility model.

[0023] In the figure: 1, motor one; 2, hydraulic control valve block; 3, cylinder barrel; 4, cover; 5, piston assembly; 6, sealing ring one; 7, sealing ring two; 8, sealing ring three; 9, ball bearing; 10, nut one; 11, lead screw; 12, anti-rotation sliding block; 13, motor housing; 14, anti-rotation sleeve; 15, motor rotor; 16, motor end cover; 17, elastic retainer one; 18, ring groove one; 19, nut small head; 20, stop end face one; 21, stop end face two; 22, nut large head end face; 23, convex rail; 24, guide groove; 31, hydraulic chamber; 32, oil passage one; 33, oil passage two; 34, sink groove; 35, boss; 51, piston; 52, cushion pad; 53, nut; 54, elastic retainer two; 55, ring groove two; 56, polygonal surface one; 57, polygonal surface two. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figures 1-4 The utility model provides a kind of technical solutions: a kind of vehicle braking resistance generating device, the vehicle braking resistance generating device includes motor one 1, hydraulic control valve block 2, cylinder barrel 3, cover 4, piston assembly 5, sealing ring one 6, sealing ring two 7, sealing ring three 8, ball bearing 9, nut one 10, lead screw 11, anti-rotation sliding block 12, motor 1 housing, anti-rotation sleeve 14, motor 1 rotor, motor 1 end cover, elastic retainer one 17, ring groove one 18, nut small head 19, stop end face one 20, stop end face two 21, nut large head end face 22, convex rail 23, guide groove 24, hydraulic chamber 31, oil passage one 32, oil passage two 33, sink groove 34, boss 35, piston 51, cushion pad 52, nut 53, elastic retainer two 54, ring groove two 55, polygonal surface one 56, polygonal surface two 57, nut 10 is axially inserted into the inner hole of motor rotor 15, nut small head 19 section is fixed with motor rotor 15 thread, the stop end face one 20 of nut is attached with the stop end face two 21 of motor rotor, elastic retainer one 17 is clamped in the ring groove one 18 of motor rotor 15 setting, elastic retainer one 17 one end is attached with nut large head end face 22, ball bearing 9 is installed on motor end cover 16, ball bearing is axially limited fixed relative to motor end cover, motor rotor 15 is installed in the inner hole of ball bearing 9, motor rotor is axially limited fixed relative to ball bearing, lead screw 11, nut 10 and ball constitute ball screw pair, anti-rotation sliding block 12 is fixedly connected with the one end of lead screw 11.

[0026] Preferably, the convex rail 23 on the anti-rotation sleeve 14 is in contact with the guide groove 24 on the anti-rotation slider 12, the anti-rotation slider slides linearly in the anti-rotation sleeve, and there is no relative rotation between the two. The anti-rotation sleeve 14 is axially inserted into the hole of the motor rotor 15, one end of the anti-rotation sleeve is fixed with the rear end of the motor housing 13, the motor 1 is bolted and connected with the hydraulic control valve block 2, the cylinder barrel 3 is axially inserted into the cylindrical hole of the hydraulic control valve block 2, the cylinder barrel is provided with a boss 35 which is embedded into the sink 34 provided on the hydraulic control valve block, the cylinder barrel is axially limited and fixed relative to the hydraulic control valve block, the sealing ring three 8 is installed between the cylinder barrel 3 and the hydraulic control valve block 2, the cover 4 is sleeved on the front end of the cylinder barrel 3, the open end of the cover is axially inserted into the cylindrical hole of the hydraulic control valve block 2, and the cover is axially limited and fixed with the hydraulic control valve block, such as threaded connection. The sealing ring one 6 is installed between the cover 4 and the hydraulic control valve block 2, the piston 51, the buffer pad 52, the nut 53 and the elastic retainer ring two 54 constitute the piston assembly 5, the nut 53 is threadedly connected with one end of the lead screw 11, the nut 53 is installed in the polygonal counterbore of the piston 51, the polygonal surface two 57 provided on the nut is matched with the polygonal surface one 56 provided on the piston, so that the relative rotation of the piston and the nut is prevented, and a designed gap is left between the polygonal surface one and the polygonal surface two. The buffer pad 52 is installed between the nut 53 and the piston 51, and the elastic retainer ring two 54 is clamped in the ring groove two 55 provided on the piston 51 to prevent the nut from being pulled out of the piston. The nut 53 can move axially and radially relative to the piston 51, the sealing ring two 7 is installed on the head of the piston 51, the front end surface of the piston 51, the inner hole surface of the cylinder barrel 3 and the bottom surface of the hole of the cover 4 form a hydraulic chamber 31, the outer cylindrical surface of the cylinder barrel 3, the inner hole surface of the cover 4 and the inner hole surface of the hydraulic control valve block 2 form an oil channel two 33, the oil channel two 33 is communicated with the hydraulic chamber 31 and the oil channel one 32, and the motor 1 is a power source for hydraulic pressure.

[0027] The screw nut one 10 is torsionally connected with the motor rotor 15, the motor drives the screw nut 10 to rotate, the screw nut drives the lead screw 11 to move linearly, the lead screw drives the piston assembly 5 to move linearly in the cylinder barrel 3, the convex rail 23 on the anti-rotation sleeve 14 limits the rotation of the anti-rotation slider 12, so that the anti-rotation slider and the lead screw 11 only move linearly, and the motor housing 13 is torsionally fixed with the anti-rotation sleeve 14 to limit the rotation and axial movement of the anti-rotation sleeve. The ball bearing 9 supports and positions the motor rotor 15 and bears the radial force and axial force generated during the operation of the motor rotor.

[0028] Working principle: motor 1 according to brake control unit sends out instruction, drive the rotation of the nut 10, ball screw pair will the rotation movement of the nut 10 into the linear motion of the lead screw 11, lead screw drive piston assembly 5 compression hydraulic cavity 31 in the brake fluid, high pressure brake fluid through oil way two 33 into the oil way of hydraulic control valve block 2, through the control distribution of hydraulic control valve block to each wheel brake cylinder, produce brake force. Finally, it should be explained that the above content is only used to explain the technical scheme of the utility model, and is not limited to the protection scope of the utility model, and the simple modification or equivalent replacement of the technical scheme of the utility model by the ordinary skill in the art does not deviate from the essence and scope of the technical scheme of the utility model.

Claims

1. A vehicle braking resistance generating device, comprising a motor (1), a hydraulic control valve block (2), a cylinder (3), a cover (4), a piston assembly (5), a sealing ring (6), a sealing ring (7), a sealing ring (8), a ball bearing (9), a nut (10), a screw (11), an anti-rotation slide block (12), a motor housing (13), an anti-rotation sleeve (14), a motor rotor (15), a motor end cover (16), an elastic retainer ring (17), a ring groove (18), a nut small head (19), a stop end surface (20), a stop end surface (21), a nut large head end surface (22), a convex rail (23), a guide groove (24), a hydraulic cavity (31), an oil passage (32), an oil passage (33), a sink groove (34), a boss (35), a piston (51), a buffer pad (52), a nut (53), an elastic retainer ring (54), a ring groove (55), a polygonal surface (56) and a polygonal surface (57), characterized in that: The female thread one (10) is axially inserted into the inner hole of the motor rotor (15), the female thread small head (19) is threadedly fixed with the motor rotor (15), the female thread end face one (20) is attached to the motor rotor end face two (21), the elastic retainer one (17) is clamped in the ring groove one (18) of the motor rotor (15), one end of the elastic retainer one (17) is attached to the female thread large head end face (22), the ball bearing (9) is installed on the motor end cover (16), the ball bearing (9) is axially limited and fixed relative to the motor end cover, the motor rotor (15) is installed in the inner hole of the ball bearing (9), the motor rotor is axially limited and fixed relative to the ball bearing, the lead screw (11), the female thread one (10) and the ball constitute a ball screw pair, and the anti-rotation block (12) is fixedly connected with one end of the lead screw (11).

2. A vehicle brake drag producing apparatus according to claim 1, wherein: The convex rail (23) provided on the anti-rotation sleeve (14) is in contact with the guide groove (24) provided on the anti-rotation block (12), the anti-rotation sleeve (14) is axially inserted into the hole of the motor rotor (15), one end of the anti-rotation sleeve is fixed with the rear end of the motor housing (13), the motor one (1) is bolted and fixedly connected with the hydraulic control valve block (2), the cylinder barrel (3) is axially inserted into the cylindrical hole of the hydraulic control valve block (2), the cylinder barrel is provided with a boss (35) which is embedded into the sink groove (34) provided on the hydraulic control valve block, the sealing ring three (8) is installed between the cylinder barrel (3) and the hydraulic control valve block (2), the cover (4) is sleeved on the front end of the cylinder barrel (3), the cover opening end is axially inserted into the cylindrical hole of the hydraulic control valve block (2), the cover is axially limited and fixed with the hydraulic control valve block, the nut (53) is threadedly fixedly connected with one end of the lead screw (11), the nut (53) is installed in the polygonal counterbore of the piston (51), the polygonal surface two (57) provided on the nut is matched with the polygonal surface one (56) provided on the piston, the matching of the polygonal surfaces makes the piston and the nut not rotate relative to each other, and a design gap is left between the polygonal surface one and the polygonal surface two.

3. A vehicle brake drag producing apparatus according to claim 2, wherein: The buffer pad (52) is installed between the nut (53) and the piston (51), the elastic retainer two (54) is clamped in the ring groove two (55) provided on the piston (51), the sealing ring two (7) is installed on the head of the piston (51), and the front end face of the piston (51) and the inner hole face of the cylinder barrel (3) and the hole bottom face of the cover (4) form a hydraulic chamber (31).

4. A vehicle brake drag producing apparatus according to claim 3, wherein: The outer circular face of the cylinder barrel (3), the inner hole face of the cover (4) and the inner hole face of the hydraulic control valve block (2) form an oil channel two (33), the oil channel two (33) is communicated between the hydraulic chamber (31) and the oil channel one (32), and the motor one (1) is a power source generated by hydraulic pressure.

5. A vehicle brake drag producing apparatus according to claim 4, wherein: The female thread one (10) is torsionally combined with the motor rotor (15).

6. A vehicle brake drag producing apparatus according to claim 5, wherein: The convex rail (23) provided on the anti-rotation sleeve (14) limits the rotation of the anti-rotation block (12).

7. A vehicle brake drag producing apparatus according to claim 6, wherein: The motor housing (13) is torsionally fixed with the anti-rotation sleeve (14), and the ball bearing (9) supports and positions the motor rotor (15).

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