Brake-by-wire electronic mechanical caliper equipment

Abstract

The utility model provides a brake-by-wire electronic mechanical caliper device. The brake-by-wire electronic mechanical caliper device comprises a motor, a gear assembly, a thrust conversion assembly, a friction plate and a parking assembly. The motor is provided with an output shaft which is provided with a ratchet wheel and a motor gear. The gear assembly is meshed with a motor gear; the thrust conversion assembly is connected with the gear assembly, and the thrust conversion assembly receives rotating power and converts the rotating power into axial thrust; the friction plate is located on the downstream side of the thrust conversion assembly. The parking assembly is located on one side of the ratchet wheel and provided with an electromagnet, a telescopic push rod and a pawl which are sequentially connected, and the pawl is detachably matched with the ratchet wheel. The internal circulation ball screw, horizontal gear transmission and planetary gear transmission structures are adopted, the structure of a product is simplified, and space utilization is reasonable; in addition, parking is conducted in the mode of the electromagnet and the ratchet wheel, the pawl is limited through the pawl groove in the caliper body, when the electromagnet pushes the pawl, the pawl slides in the groove, the structure is simple, the product size is small, and parking is reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle braking technology, concretely relates to a kind of electronic mechanical caliper equipment for brake-by-wire. BACKGROUND

[0002] At present, disc brake of vehicle on market is mainly divided into two categories of air pressure and hydraulic pressure according to different power transmission medium, but, air, hydraulic brake system universally exists problems such as complex structure, environmental pollution, slow response, control complexity, cannot adapt to the development trend of future vehicle intelligentization, brake-by-wire.

[0003] Brake controller of electric drive mode appears in prior art, it is through motor output power, then the rotating power of motor is converted into axial thrust by conversion structure, axial thrust can be used for friction plate brake of braking. This brake of electric drive mode, since it is easy to linear control, and environment-friendly, control structure is simple, so it is the development trend of future braking technology.

[0004] However, in the existing brake technology, when braking is completed, parking brake is not well performed, if motor is powered off after braking or motor appears damage or control failure problem, braking force will disappear, so it is very important to perform auxiliary parking brake in braking process. UTILITY MODEL CONTENTS

[0005] To solve the problems existing in the above-mentioned technology, the utility model provides an auxiliary parking brake technology to realize the braking need of intermediate transmission gear set.

[0006] The utility model provides a kind of electronic mechanical caliper equipment for brake-by-wire, it includes motor, gear assembly, thrust conversion subassembly, friction plate and parking assembly;

[0007] Motor has output shaft, ratchet and motor gear are provided on the output shaft;

[0008] Gear assembly is engaged with the motor gear;

[0009] Thrust conversion subassembly is connected with the gear assembly, and the thrust conversion subassembly accepts rotating power conversion into axial thrust;The thrust conversion subassembly includes lead screw, ball and nut, and the outer thread portion of the lead screw is matched with the inner thread portion of the nut by the ball.

[0010] Friction plate is located at the downstream side of the thrust conversion subassembly;

[0011] Parking assembly is located at the side of the ratchet, and parking assembly is located at the side of the ratchet, and the parking assembly is used for ratchet brake;

[0012] The parking assembly has an electromagnet, a push rod and a pawl connected in sequence, the pawl is detachably matched with the ratchet wheel; the electromagnet drives the push rod to move linearly and reciprocatingly in the axial direction after being electrified, the push rod drives the pawl to move linearly and reciprocatingly towards or away from the ratchet wheel; the pawl is clamped on the pawl after moving linearly towards the ratchet wheel, thereby forming parking brake.

[0013] Preferably, the upper shell is fixed to the lower shell by upper shell bolts, the lower shell and the upper shell form a containing space, the gear assembly, the ratchet wheel and the motor gear are placed in the containing space;

[0014] The motor is fixed on the lower shell by a motor mounting portion and motor bolts;

[0015] The lower shell is fixed on the clamp body by a lower shell mounting portion and clamp body bolts.

[0016] Preferably, a plurality of reversers are arranged on the nut, and the extension directions of the plurality of reversers are the same as the extension direction of the internal thread portion.

[0017] Preferably, the outer periphery of the downstream end of the lead screw is provided with a dust cover.

[0018] Preferably, the gear assembly has a first intermediate gear, a second intermediate gear, a large gear, a sun gear, a planet gear, a planet carrier and an internal toothed ring, the first intermediate gear is meshed with the motor gear and the second intermediate gear respectively, the second intermediate gear is connected with the large gear, the large gear is connected with the sun gear through a connecting rod, the sun gear is matched with the internal toothed ring through a plurality of planet gears, and the internal toothed ring is arranged on the planet carrier.

[0019] Preferably, the clamp body further comprises a clamp frame, and the clamp frame is used for fixedly mounting on a vehicle.

[0020] Preferably, the lower shell has a ratchet wheel placing groove, and the side portion of the ratchet wheel placing groove has a pawl placing groove.

[0021] Preferably, the driving rod of the lead screw is rotatably matched with a flange, and the flange is provided with a cylindrical roller bearing.

[0022] The utility model discloses the beneficial effect that:

[0023] 1, the electromagnet adds the ratchet wheel and carries out the parking in the mode, and the pawl is limited by the pawl groove on the clamp body, when the electromagnet pushes the pawl, the pawl slides in the groove, and the structure is simple, and the product size is small, and the parking is reliable.

[0024] 2, relative to the gas, liquid pressure brake device, the whole vehicle does not need to provide the gas, liquid pressure source additionally, and the system is more simple, and the response is faster, and the braking distance is shorter, and it is safer.

[0025] 3、The utility model discloses a structure that adopts internal circulation ball screw, spur gear drive and planetary gear drive, simplifies the structure of product, and the space utilization is reasonable. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is the structure schematic drawing of caliper whole structure of the utility model discloses a line control brake electronic mechanical caliper equipment;

[0027] Figure 2 It is the structure schematic drawing of caliper whole decomposition of the utility model discloses a line control brake electronic mechanical caliper equipment;

[0028] Figure 3 It is the structure schematic drawing of a angle of the utility model discloses a line control brake electronic mechanical caliper equipment;

[0029] Figure 4 It is the structure schematic drawing of the utility model discloses a line control brake electronic mechanical caliper equipment's Figure 3 A-A section view;

[0030] Figure 5 It is the structure schematic drawing of lower shell and parking assembly section view of the utility model discloses a line control brake electronic mechanical caliper equipment;

[0031] Figure 6 It is the structure schematic drawing of the utility model discloses a line control brake electronic mechanical caliper equipment's push force conversion component;

[0032] Figure 7 It is the structure schematic drawing of push force conversion component decomposition of the utility model discloses a line control brake electronic mechanical caliper equipment;

[0033] Figure 8 It is the structure schematic drawing of a angle of the utility model discloses a line control brake electronic mechanical caliper equipment's push force conversion component;

[0034] Figure 9 It is the structure schematic drawing of the utility model discloses a line control brake electronic mechanical caliper equipment's Figure 8 B-B section view;

[0035] Figure 10 It is the structure schematic drawing of the utility model discloses a line control brake electronic mechanical caliper equipment's Figure 3 A-A section view with guide block;

[0036] Figure 11 It is the structure schematic drawing of gear assembly decomposition of the utility model discloses a line control brake electronic mechanical caliper equipment;

[0037] Figure 12It is a schematic view of the angle structure of the gear assembly of the electronic mechanical caliper equipment for the line control brake.

[0038] Figure 13 It is a schematic view of the lower shell of the electronic mechanical caliper equipment for the line control brake. Figure 12 It is a schematic view of the H-H cross-sectional view.

[0039] Figure 14 It is a schematic view of the lower shell of the electronic mechanical caliper equipment for the line control brake.

[0040] Mark explanation:

[0041] 10-motor; 11-output shaft; 12-ratchet wheel; 13-motor gear; 14-motor mounting portion; 15-motor bolt;

[0042] 20-gear assembly; 21-first intermediate gear; 22-second intermediate gear; 23-large gear; 24-sun gear; 25-planet wheel; 26-planet carrier; 27-internal toothed ring;

[0043] 30-thrust conversion assembly; 31-screw; 311-outer threaded portion; 312-driving rod; 32-ball; 33-nut; 331-inner threaded portion; 332-reverser; 333-end cover; 334-guiding sliding slot; 34-dust cover; 35-flange; 36-cylindrical roller bearing;

[0044] 40-friction plate; 50-parking assembly; 51-electromagnet; 52-telescopic push rod; 53-pawl; 54-fixed block; 55-pressing spring;

[0045] 100-upper shell; 110-upper shell bolt; 200-lower shell; 210-lower shell mounting portion; 220-ratchet wheel placing groove; 230-pawl placing groove; 300-caliper body; 310-caliper body bolt; 320-caliper bracket; 330-guiding block. Specific embodiment

[0046] Example 1:

[0047] As Figures 1-4 shown, the electronic mechanical caliper equipment for the line control brake provided by the utility model includes motor 10, gear assembly 20, thrust conversion assembly 30, friction plate 40 and parking assembly 50.

[0048] Motor 10 has output shaft 11, and ratchet wheel 12 and motor gear 13 are arranged on output shaft 11.

[0049] Gear assembly 20 is engaged with motor gear 13.

[0050] The thrust conversion assembly 30 is connected with the gear assembly 20, and the thrust conversion assembly 30 receives rotational power and converts the rotational power into axial thrust; preferably, as shown in the figure, the thrust conversion assembly 30 comprises a screw rod 31, a ball 32 and a nut 33, the outer threaded part 311 of the screw rod 31 is matched with the inner threaded part 331 of the nut 33 through the ball 32. The screw rod 31 receives rotational power, and the nut 33 is moved by the ball 32, and the nut 33 is limited to only axial movement, thereby completing the conversion of rotational force. Figures 6-9 The thrust conversion assembly 30 is connected with the gear assembly 20, and the thrust conversion assembly 30 receives rotational power and converts the rotational power into axial thrust; preferably, as shown in the figure, the thrust conversion assembly 30 comprises a screw rod 31, a ball 32 and a nut 33, the outer threaded part 311 of the screw rod 31 is matched with the inner threaded part 331 of the nut 33 through the ball 32. The screw rod 31 receives rotational power, and the nut 33 is moved by the ball 32, and the nut 33 is limited to only axial movement, thereby completing the conversion of rotational force.

[0051] The friction plate 40 is located on the downstream side of the thrust conversion assembly 30;

[0052] As shown in the figure, Figure 5 ,

[0053] The parking assembly 50 is located on one side of the ratchet wheel 12, and the parking assembly 50 has an electromagnet 51, a push rod 52 and a pawl 53 connected in sequence, and the pawl 53 is detachably matched with the ratchet wheel 12. The electromagnet 51 has a power coil, a permanent magnet, a moving iron core and a fixed iron core inside. After being powered on, the moving iron core moves under the action of the magnetic field, drives the push rod 52 to move axially and linearly reciprocatingly, and then drives the pawl 53 to move linearly towards or away from the ratchet wheel 12. After the pawl 53 moves linearly towards the ratchet wheel 12, the pawl 53 can be clamped on the ratchet wheel 12, so as to fix the ratchet wheel 12 (as shown in the figure), and correspondingly, the motor gear 13 is clamped and fixed, forming a parking brake. The technology of the electromagnet 51 powering on to move the push rod 52 belongs to the prior art, and will not be described here. The electromagnet 51 can also be replaced by a screw rod drive or other existing telescopic structure. Figure 5 The parking assembly 50 is located on one side of the ratchet wheel 12, and the parking assembly 50 has an electromagnet 51, a push rod 52 and a pawl 53 connected in sequence, and the pawl 53 is detachably matched with the ratchet wheel 12. The electromagnet 51 has a power coil, a permanent magnet, a moving iron core and a fixed iron core inside. After being powered on, the moving iron core moves under the action of the magnetic field, drives the push rod 52 to move axially and linearly reciprocatingly, and then drives the pawl 53 to move linearly towards or away from the ratchet wheel 12. After the pawl 53 moves linearly towards the ratchet wheel 12, the pawl 53 can be clamped on the ratchet wheel 12, so as to fix the ratchet wheel 12 (as shown in the figure), and correspondingly, the motor gear 13 is clamped and fixed, forming a parking brake. The technology of the electromagnet 51 powering on to move the push rod 52 belongs to the prior art, and will not be described here. The electromagnet 51 can also be replaced by a screw rod drive or other existing telescopic structure.

[0054] In specific applications, the motor 10 provides power, and the power is transmitted to the gear assembly 20 through the motor gear 13, and then the rotational power is converted into linear thrust through the thrust conversion assembly 30, and the linear thrust is braked by the friction plate 40 on the downstream side. In addition, after the braking is completed, the parking assembly 50 works, and the pawl 53 can clamp and fix the ratchet wheel 12, and the ratchet wheel 12 and the motor gear 13 are coaxially fixed, so that the motor gear 13 is kept in a specific position to avoid accidental rotation, thereby realizing parking brake.

[0055] Embodiment 2:

[0056] Preferably, as shown in the figure, Figure 1 , 2As shown, the embodiment also includes an upper shell 100, a lower shell 200 and a clamp body 300, the upper shell 100 is fixed to the lower shell 200 by upper shell bolts 110, a containing space is formed between the lower shell 200 and the upper shell 100, the gear assembly 20, the ratchet 12 and the motor gear 13 are placed in the containing space.

[0057] The motor 10 is fixed on the lower shell 200 by a motor mounting portion 14 and motor bolts 15;

[0058] The gear assembly is arranged very reasonably by the containing space, and the motor 10 is located at a side position, the arrangement direction of the motor 10 is parallel to the arrangement direction of the thrust conversion assembly 30, the space is reasonably utilized, and the space waste is reduced.

[0059] The lower shell 200 is fixed on the clamp body 300 by a lower shell mounting portion 210 and clamp body bolts 310. The lower shell 200 and the upper shell 100 are detachably arranged, which facilitates the disassembly and maintenance of the gear assembly 20 inside.

[0060] Preferably, as Figure 10 As shown, for example, a guide sliding groove 334 is provided on the side of the nut 33, the guide sliding groove 334 cooperates with a guide block 330 on the clamp body 300, thereby forming a circumferential limit to realize the axial movement of the nut 33.

[0061] Preferably, Figure 7 The nut 33 is arranged with a plurality of reversers 332, and the extension direction of the plurality of reversers 332 is the same as the extension direction of the internal thread portion 331. The reverser 332 functions to make the ball return to the starting position after one cycle, forming a complete closed loop; the reverser is equivalent to a channel, enabling the ball to return to the starting position.

[0062] Preferably, the outer periphery of the downstream side end portion of the lead screw 31 is provided with a dust cover 34, which avoids the entry of external dust from the friction plate 40 to the side of the nut 33. In addition, the end portion of the nut 33 has an end cover 333, which protects the internally arranged lead screw 31.

[0063] Preferably, as Figures 11-13 As shown, the gear assembly 20 has a first intermediate gear 21, a second intermediate gear 22, a large gear 23, a sun gear 24, a planet gear 25, a planet carrier 26 and an inner ring gear 27, the first intermediate gear 21 is engaged with the motor gear 13 and the second intermediate gear 22 respectively, the second intermediate gear 22 is connected with the large gear 23, the large gear 23 is connected with the sun gear 24 through a connecting rod, the sun gear 24 cooperates with the inner ring gear 27 through a plurality of planet gears 25, and the inner ring gear 27 is arranged on the planet carrier 26.

[0064] In the specific work, the motor 10 output power is driven by the output shaft 11 to rotate the ratchet 12 and the motor gear 13, the motor gear 13 is engaged to drive the first gear 21 to rotate, the first gear 21 drives the second gear 22 to rotate through the connecting rod, the second gear 22 is engaged to drive the large gear 23 to rotate, the large gear 23 drives the sun gear 24 to rotate through the connecting rod, the sun gear 24 drives the planetary gear 25 on the planet carrier 26 to rotate, and the planetary gear 25 is matched with the inner ring 27. The setting of the planet carrier makes the power transmission more stable and balanced, and the motor power at the side position is transmitted to the thrust conversion assembly 30 arranged in parallel on the side, and the space layout is reasonable and compact.

[0065] Preferably, the clamp body 300 further comprises a clamp frame 320 for fixedly mounting on a vehicle.

[0066] Preferably, as shown in the drawings, Figure 14 Preferably, as shown in the drawings, the lower shell 200 has a ratchet placing groove 220, and the side of the ratchet placing groove 220 has a pawl placing groove 230. This structure plays a guiding role for the movement of the pawl 53, and the movement path is more stable.

[0067] Preferably, as shown in the drawings, Figure 6 Preferably, as shown in the drawings, the driving rod 312 of the lead screw 31 is rotatably matched with the flange 35, and the cylindrical roller bearing 36 is arranged on the flange 35.

[0068] The working process of the structure of the utility model is as follows:

[0069] Braking process:

[0070] Service brake: after the controller receives the whole vehicle braking request, the motor 10 is controlled to perform the braking action, and the torque of the motor 10 is input to the lead screw 31 through the spur gear (motor gear and gear), the planetary gear (gear on the planet carrier), and the rotation motion is converted into the horizontal pushing of the nut 33 by the ball screw pair, and the thrust is generated.

[0071] Release process: the process is completely opposite to the clamping process.

[0072] Parking brake: parking can be performed by pushing the pawl 53 to lock the ratchet 12 by the electromagnet 51, and after the product receives the whole vehicle parking request, the motor 10 is controlled to perform the clamping action, when the clamping force reaches the target value, the telescopic push rod 52 is pushed out, the pawl 53 locks the ratchet 12, at this time, the parking mechanism is controlled to park, and after the parking mechanism completes the parking action, the motor 10 is powered off.

Claims

1. A brake-by-wire electronic mechanical caliper apparatus, characterized by, It comprises: a motor (10) having an output shaft (11) provided with a ratchet wheel (12) and a motor gear (13); a gear assembly (20) engaged with the motor gear (13); a thrust force conversion assembly (30) connected with the gear assembly (20), which accepts rotational power and converts it into axial thrust force; the thrust force conversion assembly (30) comprises a screw rod (31), a ball (32) and a nut (33), the outer threaded part (311) of the screw rod (31) is matched with the inner threaded part (331) of the nut (33) through the ball (32); a friction plate (40) located on the downstream side of the thrust force conversion assembly (30); a parking assembly (50) located on the side of the ratchet wheel (12), which is used for ratchet wheel (12) braking; the parking assembly (50) has an electromagnet (51), a push rod (52) and a pawl (53) connected in turn, and the pawl (53) is detachably matched with the ratchet wheel (12); the electromagnet (51) drives the push rod (52) to move axially and linearly after being powered on, and the push rod (52) drives the pawl (53) to move linearly towards or away from the ratchet wheel (12); after the pawl (53) moves linearly towards the ratchet wheel (12), it is clamped on the pawl (53), forming a parking brake.

2. The electronically controlled brake with electronic mechanical caliper apparatus according to claim 1, wherein, It also comprises an upper shell (100), a lower shell (200) and a clamp body (300), the upper shell (100) is connected and fixed to the lower shell (200) through upper shell bolts (110), and a containing space is formed between the upper shell (100) and the lower shell (200), in which the gear assembly (20), the ratchet wheel (12) and the motor gear (13) are placed.

3. The electronic mechanical caliper device according to claim 2, wherein the motor (10) is fixed on the lower shell (200) through a motor mounting portion (14) and motor bolts (15); the lower shell (200) is fixed on the clamp body (300) through a lower shell mounting portion (210) and clamp body bolts (310).

4. The electronically controlled brake with electronic mechanical caliper apparatus according to claim 2, wherein, The clamp body (300) further comprises a clamp frame (320) for fixed installation on a vehicle.

5. The electronically controlled brake with electronic mechanical caliper apparatus according to claim 2, wherein, The lower shell (200) has a ratchet wheel placing groove (220), and the side of the ratchet wheel placing groove (220) has a pawl placing groove (230).

6. The electronically controlled brake with electronic mechanical caliper apparatus according to claim 1, wherein, A plurality of reversers (332) are arranged on the nut (33), and the extension directions of the plurality of reversers (332) are the same as the extension direction of the inner threaded part (331).

7. The electronically controlled brake with electronic mechanical caliper apparatus according to claim 1, wherein, The outer periphery of the downstream end of the screw rod (31) has a dust cover (34).

8. The electronically controlled brake with electronic mechanical caliper apparatus according to claim 1, wherein, The driving rod (312) of the screw rod (31) is rotatably matched with a flange (35), and the flange (35) is provided with a cylindrical roller bearing (36).

9. The electronically mechanically caliper-equipped brake-by-wire according to any one of claims 1 to 8, characterized in that, The gear assembly (20) has a first intermediate gear (21), a second intermediate gear (22), a big gear (23), a sun gear (24), a planet gear (25), a planet carrier (26) and an inner ring gear (27), the first intermediate gear (21) is engaged with the motor gear (13) and the second intermediate gear (22) respectively, the second intermediate gear (22) is connected with the big gear (23), the big gear (23) is connected with the sun gear (24) through a connecting rod, the sun gear (24) is matched with the inner ring gear (27) through a plurality of planet gears (25), and the inner ring gear (27) is arranged on the planet carrier (26).

10. The electronically mechanically caliper-equipped brake-by-wire according to any one of claims 1-8, characterized in that, A guide sliding groove (334) is arranged on the side of the nut (33), the guide sliding groove (334) is matched with a guide block (330) on the clamp body (300), and thus circumferential limiting is formed, so that the axial movement of the nut (33) is realized.

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