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CN-119084496-B - Central parking system

CN119084496BCN 119084496 BCN119084496 BCN 119084496BCN-119084496-B

Abstract

The application provides a central parking system, which is miniaturized by improving the structure of the central parking system. The central parking system comprises a driving assembly, a seat, a second tooth structure, a first tooth structure and a transmission shaft in transmission connection with the transmission shaft of a vehicle motor, wherein the second tooth structure and the transmission shaft form rotation along with each other, the first tooth structure is in sliding fit with the seat, the seat is a fixed end and is used for supporting the driving assembly, and the first tooth structure moves along the axial direction of the transmission shaft under the driving of the driving assembly so as to be meshed with or separated from the second tooth structure. In the scheme of the application, the mode of friction braking of the circumferential side wall of the brake drum of the traditional drum brake is changed, and the mode of axially engaging two tooth structures is adopted, so that the turning radius of the first tooth structure is obviously locked, the size of the seat part is correspondingly reduced, and the miniaturization of the central parking system is realized.

Inventors

  • PENG NANJIANG
  • MA GUO
  • LIU GUIYONG
  • LIANG ZHI
  • QIN JIAXING
  • Tang Xuanhao
  • LIAN HAO
  • LI WEIPENG
  • DAI DI

Assignees

  • 柳州五菱汽车工业有限公司

Dates

Publication Date
20260508
Application Date
20240814

Claims (7)

  1. 1. A central parking system, characterized by comprising a first tooth structure (100), a second tooth structure (200), a driving assembly (300), a seat (3) and a transmission shaft (15) in transmission connection with the output end of a vehicle motor, wherein the second tooth structure (200) and the transmission shaft (15) form a follow-up rotation; The first tooth structure (100) is in sliding fit with the seat part (3), the seat part (3) is a fixed end and is used for supporting the driving assembly (300), and the first tooth structure (100) moves along the axial direction (P) of the transmission shaft (15) under the driving of the driving assembly (300) to be meshed with or away from the second tooth structure (200); the driving assembly (300) comprises a driving shaft (10), a cam (19) and an executing motor (1), wherein the driving shaft (10) is provided with the cam (19); The driving shaft (10) is arranged along the radial direction of the transmission shaft (15), and the cam (19) is provided with a small-diameter side and a large-diameter side; The cam (19) comprises a lower side (192) and an upper side (191), the lower side (192) is used for being connected with the driving shaft (10), and the upper side (191) is used for being propped against a brake ring; the cam (19) further comprises a large-diameter end (193) positioned on the large-diameter side and a small-diameter end (194) positioned on the small-diameter side, the large-diameter end (193) and the small-diameter end (194) are a left side edge (193 a) and a right side edge (194 a) which are used for connecting the upper side edge (191) and the lower side edge (192), the end face of the small-diameter end (194) directly or indirectly abuts against the end face of the large-diameter end (193), and the outer wall of the large-diameter end (193) exceeds the outer wall of the small-diameter end (194) in the radial direction; the driving assembly (300) further comprises a rebound piece, one axial end of the rebound piece is propped against the seat part (3), and the other axial end of the rebound piece is propped against the brake ring.
  2. 2. The central parking system according to claim 1, characterized in that the first tooth structure (100) and the second tooth structure (200) each have several tooth bodies (13); The tooth height (H) of each tooth body (13) is parallel to the axis of the transmission shaft (15), and each tooth body (13) extends along the radial direction of the transmission shaft (15) and is arranged along the circumferential direction of the transmission shaft (15).
  3. 3. The central parking system according to claim 2, further comprising a housing portion (18), said housing portion (18) having said drive shaft (15) and said second tooth structure (200) disposed therein, said seat portion (3) being fixedly connected with said housing portion (18); the end of the drive shaft (15) extends beyond the second tooth structure (200) in the axial direction (P) and into the seat (3).
  4. 4. A central parking system according to claim 3, wherein the seat (3) comprises a fixedly connected inner cylinder (11) and an outer cylinder (17), the inner cylinder (11) being located inside the outer cylinder (17), an annular cavity being defined between the inner cylinder (11) and the outer cylinder (17), the first tooth structure (100) comprising a brake ring located in the annular cavity and in sliding engagement with a wall of the annular cavity, the brake ring being arranged coaxially with the second tooth structure (200).
  5. 5. A central parking system according to claim 4, wherein one end of the inner cylinder (11) is fixed to the outer cylinder (17) in the axial direction (P) and the other end extends into the housing portion (18) and is located radially outside the drive shaft (15); The tooth body (13) of the second tooth arrangement (200) is located radially on the side of the inner cylinder (11) remote from the drive shaft (15) and axially (P) opposite the annular cavity.
  6. 6. The central parking system according to claim 5, wherein the cam (19) has an equal diameter section (196), the equal diameter section (196) being connected to the large diameter end (193), the small diameter end (194) being in contact with a side of the equal diameter section (196) remote from the large diameter end (193) in a circumferential direction of the drive shaft (10), an outer wall of the equal diameter section (196) being equidistant from a rotation center of the cam (19); when the first tooth structure (100) is meshed with the second tooth structure (200), the first tooth structure (100) is abutted against the constant diameter section (196).
  7. 7. Central parking system according to claim 5, characterized in that the brake ring comprises a ring body (6), which ring body (6) is provided with the tooth body (13); A step structure (12) is formed on the inner ring side of the ring body (6), the step structure (12) comprises a first table top and a second table top, the first table top is opposite to the second table top along the axial direction (P), the first table top is propped against the cam (19), and the second table top is propped against the rebound piece; The outer wall of the inner cylinder (11), the second table top and the inner wall of the ring body (6) enclose a guide cavity, and the rebound piece is arranged in the guide cavity.

Description

Central parking system Technical Field The invention relates to the technical field of vehicle braking, in particular to a central parking system. Background The central parking system is used for braking the power output end of the vehicle. The common central parking system comprises a drum brake, a brake drum of the drum brake is fixed on a brake connecting flange through bolts, the brake connecting flange is fixed on a power output end (a gear shaft of a speed reducer or a transmission shaft in transmission connection with an output end of a motor) through a spline, a brake bottom plate is a fixed end, parts such as a brake shoe and the like are fixed on the brake bottom plate, and friction force is generated by contact between friction plates on the brake shoe and the inner wall of the brake drum under the braking condition, so that braking parking is realized. However, the size of the existing central parking system is relatively large, and it is always sought after by those skilled in the art how to achieve miniaturization of the central parking system. Disclosure of Invention The invention aims to provide a central parking system, which is miniaturized by improving the structure of the central parking system. In order to achieve the above purpose, the application provides a central parking system, which comprises a driving assembly, a seat part, a second tooth structure, a first tooth structure and a transmission shaft in transmission connection with the transmission shaft of a vehicle motor, wherein the second tooth structure and the transmission shaft form a follow-up rotation, the first tooth structure is in sliding fit with the seat part, the seat part is a fixed end and is used for supporting the driving assembly, and the first tooth structure moves along the axial direction of the transmission shaft under the driving of the driving assembly so as to be meshed with or separated from the second tooth structure. In the scheme of the application, the mode of friction braking of the circumferential side wall of the brake drum of the traditional drum brake is changed, and the mode of axially engaging two tooth structures is adopted, so that the turning radius of the first tooth structure is obviously locked, the size of the seat part is correspondingly reduced, and the miniaturization of the central parking system is realized. Optionally, the first tooth structure and the second tooth structure are provided with a plurality of tooth bodies, the tooth height of each tooth body is parallel to the axis of the transmission shaft, and each tooth body extends along the radial direction of the transmission shaft and is arranged along the circumferential direction of the transmission shaft. By arranging a plurality of tooth bodies which can be mutually meshed along the axial direction, the number of the tooth bodies is increased, the transmission torque is obviously increased, and the braking strength of the central parking system is increased while the integral downsizing of the central parking system is realized. Optionally, the transmission shaft comprises a shell, the transmission shaft and the second tooth structure are arranged in the shell, the seat is fixedly connected with the shell, and the end part of the transmission shaft axially extends out of the second tooth structure and extends into the seat, so that the axial size is further reduced. Optionally, the seat comprises a fixed connection inner cylinder and an outer cylinder, the inner cylinder is located at the inner side of the outer cylinder, an annular cavity is defined between the inner cylinder and the outer cylinder, the first tooth structure comprises a brake ring, the brake ring is located in the annular cavity and is in sliding fit with the wall part of the annular cavity, and the annular cavity, the brake ring and the second tooth structure are coaxially arranged. Optionally, one end of the inner cylinder is fixed to the outer cylinder in the axial direction, the other end of the inner cylinder extends into the shell and is positioned on the outer side of the transmission shaft in the radial direction, and the tooth body positioned on the second tooth structure is positioned on one side of the inner cylinder away from the transmission shaft in the radial direction and is opposite to the annular cavity in the axial direction, so that the arrangement mode of each component is more compact. The driving assembly comprises a pushing-out piece and a rebound piece, wherein the pushing-out piece is provided with a pushing-out working condition and a retraction working condition, the pushing-out piece drives the first tooth structure to move towards a direction close to the second tooth structure and drives the rebound piece to deform so as to store energy in the pushing-out working condition, and the rebound piece drives the first tooth structure to move towards a direction far away from the second tooth structure in the retraction working co