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CN-121977030-A - Novel return mechanism and dry-type electronic parking brake

CN121977030ACN 121977030 ACN121977030 ACN 121977030ACN-121977030-A

Abstract

The invention relates to the field of brakes and discloses a novel return mechanism and a dry-type electronic parking brake, wherein a U-shaped bayonet is formed on a first connecting part and a second connecting part, and a left flange and a right flange which are in interference with the U-shaped bayonet are arranged on a first fixing part and a second fixing part; the first fixing part and the second fixing part are both fixed with the main spring frame through riveting, the guide spring frame is positioned between the upper support spring frame and the lower support spring frame, the guide spring frame is fixed with the main spring frame through riveting, and the left end and the right end of the guide spring frame are both provided with limiting openings. The brake has the advantages of reliable return, low dragging, no need of additional brackets and the like.

Inventors

  • GU HANGBIN
  • ZHOU ZAISONG
  • FU KEJIA
  • WANG YEXIN
  • HUANG HUJIE
  • XUAN CHAOHUI
  • CAI PENGCHENG

Assignees

  • 浙江万安智驭汽车控制系统有限公司

Dates

Publication Date
20260505
Application Date
20260130

Claims (10)

  1. 1. The novel return mechanism is characterized by comprising a main spring frame (1), an upper support spring frame (4), a lower support spring frame (5) and a guide spring frame (17), wherein all the components have elastic deformation capacity; The main spring frame (1) is vertically arranged and comprises an upper support (2) at the upper end, a lower support (3) at the lower end, a first fixing part (15) and a second fixing part (16) which are formed by middle bending; the upper support spring frame (4) is provided with a left first left support wing (6), a right first right support wing (7) and a first connecting part (10) in the middle; The lower support spring frame (5) is provided with a left second left support wing (8), a right second right support wing (9) and a middle second connecting part (11); The first connecting part (10) and the second connecting part (11) are respectively provided with a U-shaped bayonet (12), and the first fixing part (15) and the second fixing part (16) are respectively provided with a left flange (13) and a right flange (14) which are abutted against the U-shaped bayonet (12), and the first fixing part (15) and the second fixing part (16) are respectively fixed with the main spring frame (1) through riveting; The guide spring frame (17) is positioned between the upper support spring frame (4) and the lower support spring frame (5), the guide spring frame (17) is fixed with the main spring frame (1) through riveting, and the left end and the right end of the guide spring frame (17) are provided with limiting ports (18).
  2. 2. The novel return mechanism according to claim 1, wherein the first fixing part (15) and the second fixing part (16) are formed by bending reeds extending from the left side edge part and the right side edge part of the main spring frame (1), the reeds extending from the left side edge part and the right side edge part are a first reed and a second reed, and the first reed and the second reed are respectively in interference fixation with the left inner side surface and the right inner side surface of the U-shaped bayonet (12) under the action of elasticity.
  3. 3. The novel return mechanism according to claim 2, wherein the first left support wing (6) and the first right support wing (7) are formed by bending and extending from the edge of the U-shaped bayonet (12) of the first connecting part (10), and the second left support wing (8) and the second right support wing (9) are formed by bending and extending from the edge of the U-shaped bayonet (12) of the second connecting part (11).
  4. 4. The novel return mechanism according to claim 1 is characterized in that the whole of the first left support wing (6), the first right support wing (7), the second left support wing (8) and the second right support wing (9) is S-shaped, each of the first left support wing, the second left support wing and the second right support wing is provided with a first arc section (21) connected with a U-shaped bayonet (12) and a second arc section (22) with the outer end being used for abutting against a brake block, and the first arc section (21) and the second arc section (22) are connected through a first straight section (23).
  5. 5. The dry-type electronic parking brake is characterized by comprising a clamp body and the novel return mechanism according to any one of claims 1 to 4, wherein the clamp body is divided into an upper part (44) and a lower part (45), the upper part (44) and the lower part (45) are connected through fixing bolts, a clamp cavity (24) is arranged on the front side of the clamp body, a clamp back side is arranged on the rear side of the clamp body, an assembly opening (25) is formed in the clamp back side, the assembly opening (25) is communicated with the clamp cavity (24), a first guide pin (26) and a second guide pin (27) are arranged on the clamp back side, the first guide pin (26) and the second guide pin (27) are vertically arranged and are assembled in the clamp body, and the first guide pin (26) and the second guide pin (27) are buckled with limit openings (18) on the left end and the right end of a guide spring frame (17) respectively.
  6. 6. The dry electronic parking brake of claim 5, wherein the first guide pin (26) and the second guide pin (27) have the same structure, the upper end of the first guide pin (26) is of a conical head structure, the middle part of the first guide pin is provided with a first limit groove (28), the lower end of the first guide pin is provided with a second limit groove (29), the lower clamp body is provided with a first jack, the upper clamp body is provided with a second jack, the guide pin is assembled in the second jack in a plugging manner through the first jack and the assembly port (25), the dry electronic parking brake further comprises a lock spring (46), the lock spring (46) is sleeved in the second limit groove (29) and limited by end faces at two ends of the second limit groove (29) in the axial direction, the outer diameter of the lock spring (46) is larger than the inner diameter of the first jack, the lock spring (46) can realize the outer diameter reduction under the condition of stress through the arranged notch structure, the limit port (18) is matched with the first limit groove (28), and the limit port (18) is clamped in the first limit groove (28) under the elastic effect.
  7. 7. The dry electronic parking brake according to claim 6, further comprising an upper brake block (32) and a lower brake block (33), wherein the upper brake block (32) and the lower brake block (33) are sleeved on the first guide pin (26) and the second guide pin (27), the inner side surface of the upper brake block (32) is supported by the first left support wing (6) and the first right support wing (7), the inner side surface of the lower brake block (33) is supported by the second left support wing (8) and the second right support wing (9), and the upper brake block (32) and the lower brake block (33) are in interference with the inner wall of the upper caliper body and the inner wall of the lower caliper body under the action of the upper support spring frame (4) and the lower support spring frame (5); The back side of the pliers of the upper brake block (32) and the lower brake block (33) is provided with an avoidance port (36), the upper support (2) is of a U-shaped structure formed by bending the upper end of the main spring frame (1), the lower support (3) is of a U-shaped structure formed by bending the lower end of the main spring frame (1), the upper support (2) is abutted in the avoidance port (36) of the upper brake block (32), and the lower support (3) is abutted in the avoidance port (36) of the lower brake block (33).
  8. 8. The dry-type electronic parking brake as defined in claim 5, wherein the upper caliper body is further provided with a pin assembly (37), the upper caliper body can axially slide relative to the pins, the pin assembly (37) comprises a rubber or plastic positioning sleeve (38), a metal sliding sleeve (40) arranged in the positioning sleeve (38) and a connecting pin (41) arranged in the sliding sleeve and used for being fixed with a vehicle, the upper end and the lower end of the positioning sleeve (38) are respectively provided with a limit flange, the upper caliper body is provided with a pin hole (46) for arranging the pin assembly (37), the positioning sleeve (38) is pressed into the pin hole (46) under the action of pressure deformation, so that the limit flange on the upper side is abutted against the upper end face of the pin hole (46), the limit flange on the lower side is abutted against the lower end face of the pin hole (46), the metal sliding sleeve (40) is fixedly matched with the positioning sleeve (38), and the connecting pin (41) is in sliding fit and inserted into the metal sliding sleeve (40).
  9. 9. A dry electronic parking brake according to claim 8, wherein the upper end of the positioning sleeve (38) is an upper limit flange (39), the lower end of the positioning sleeve is a lower limit flange (42), the upper limit flange (39) is provided with a first limit ring, the upper end face of the first limit ring is provided with the first positioning sleeve (38), the outer diameter of the first positioning sleeve (38) is smaller than that of the first limit ring, the lower edge of the lower limit flange (42) is provided with a chamfer or a round angle, and the thickness of the lower limit flange (42) is 1 mm-5 mm.
  10. 10. A dry electronic parking brake according to claim 5, wherein an actuator (43) for pushing the brake piston is further mounted on the upper caliper body.

Description

Novel return mechanism and dry-type electronic parking brake Technical Field The invention relates to the field of braking, in particular to a novel return mechanism and a dry-type electronic parking brake. Background The electronic parking brake is an important component applied to a vehicle braking system, and as the electric vehicle becomes more popular, the whole weight of the electric car becomes larger and the electric car becomes more mute, so that the requirement on the parking force becomes higher and the mute of the braking is also required to be higher. For example, chinese patent CN223648390U discloses a double-cylinder EPB electronic parking brake, which satisfies the requirement of large braking force through double-cylinder arrangement, but has no improvement in terms of silence and low drag, and meanwhile, the existing electronic parking brake needs a separate bracket for fixing installation, and the whole volume is larger. Disclosure of Invention Aiming at the defects of dragging and noise in the return and the need of installing a bracket lamp independently in the scheme in the prior art, the invention provides a novel return mechanism and a dry-type electronic parking brake. In order to solve the technical problems, the invention is solved by the following technical scheme: A novel return mechanism comprises a main spring frame, an upper support spring frame, a lower support spring frame and a guide spring frame, wherein all the components have elastic deformation capacity; the main spring frame is vertically arranged and comprises an upper support at the upper end, a lower support at the lower end, a first fixing part and a second fixing part, wherein the first fixing part and the second fixing part are formed by middle bending; The upper support spring frame is provided with a first left support wing at the left side, a first right support wing at the right side and a first connecting part at the middle part; the lower support spring frame is provided with a second left support wing at the left side, a second right support wing at the right side and a second connecting part at the middle part; the first connecting part and the second connecting part are respectively provided with a U-shaped bayonet, and the first fixing part and the second fixing part are respectively provided with a left flange and a right flange which are abutted against the U-shaped bayonet; The guide spring frame is positioned between the upper support spring frame and the lower support spring frame, the guide spring frame is fixed with the main spring frame through riveting, and the left end and the right end of the guide spring frame are provided with limiting openings. Preferably, the first fixing portion and the second fixing portion are formed by bending reeds extending from the left side edge portion and the right side edge portion of the main spring frame, the reeds extending from the left side edge portion and the right side edge portion are a first reed and a second reed, and the first reed and the second reed are respectively abutted and fixed with the left inner side face and the right inner side face of the U-shaped bayonet under the action of elasticity. Preferably, the first left support wing and the first right support wing are formed by bending and extending from the edge of the U-shaped bayonet of the first connecting part, and the second left support wing and the second right support wing are formed by bending and extending from the edge of the U-shaped bayonet of the second connecting part. Preferably, the first left support wing, the first right support wing, the second left support wing and the second right support wing are all S-shaped, and are provided with a first arc section connected with the U-shaped bayonet and a second arc section with the outer end being used for abutting against the brake block, and the middle parts of the first arc section and the second arc section are connected through a first straight section. The dry-type electronic parking brake comprises a clamp body and the novel return mechanism, wherein the clamp body is divided into an upper part and a lower part, the upper part and the lower part are connected through a fixing bolt, a jaw cavity is formed in the front side of the clamp body, a clamp back side is formed in the rear side of the clamp body, an assembly port is formed in the clamp back side and communicated with the jaw cavity, a first guide pin and a second guide pin are arranged on the clamp back side and vertically arranged in an inserting mode and assembled in the clamp body, and the first guide pin and the second guide pin are buckled with limit ports at the left end and the right end of a guide spring frame respectively. The structure of the first guide pin and the structure of the second guide pin are the same, the upper end of the first guide pin is of a conical head structure, the middle part of the first guide pin is provided with a first limit groove