Manual lifting adjustment device with double pawl driving and brake block interchangeability

Abstract

The invention discloses a manual lifting adjustment device with double pawl driving and brake block interchangeability. The manual lifting adjustment device comprises a handle plate (1), a mounting plate (2), a rotating plate (3), a left pawl (4), a right pawl (41), an inner gear driver plate (5), a brake block (6), a snap ring A (7), a snap ring B (71), a driving cam (8), a casing (9), a central shaft (10), an output gear (11), a return spring (12) and an end sleeve (13). According to the manual lifting adjustment device disclosed by the invention, by using the interchangeability of the brake block, the error of the assembly is avoided and the qualification rate of products is improved; the left pawl and the right pawl are respectively and separately in meshed connection with the inner gear driver plate to transmit the torque, so that the defect that the tooth sliding fault easily occurs in the integral pawl is overcome and the work reliability is improved, and further the manual lifting adjustment device for an automobile seat achieves the aims of improving the reliability, simplifying the structure, reducing the size and the weight and reducing the cost.

Description

technical field [0001] The invention relates to a lift adjustment device, in particular to a manual lift adjustment device for manually adjusting the height of a car seat with double pawl transmission and interchangeable brake blocks. Background technique [0002] According to the needs of drivers and passengers, the position of the car seat can be adjusted through the lifting adjustment device, which is divided into manual and electric. The manual lifting adjustment device of the car seat in the prior art has double torsion spring type and roller type. ;Double torsion spring type has large operating force and small self-locking force, which is prone to self-propelled phenomenon, and can only be locked in one direction, which has hidden dangers in reliability and safety; the roller type has complex structure, large body, heavy weight, and high cost; [0003] In the prior art, the oscillating integral ratchet is used to mesh with the internal tooth dial to transmit the input ...

AI Technical Summary

Problems solved by technology

[0002] According to the needs of drivers and passengers, the position of the car seat can be adjusted through the lifting adjustment device, which is divided into manual and electric. The manual lifting adjustment device of the car seat in the prior art has double torsion spring type and roller type. ;Double torsion spring type has large operating force and small self-locking force, which is prone to self-propelled phenomenon, and can only be locked in one direction, which has hidden dangers in reliability and safety; the roller type has complex structure, large body, heavy weight, and high cost;

[0003] In the prior art, the oscillating integral ratchet is used to mesh with the internal tooth dial to transmit the input torque, often due to insufficient oscillating, unreliable meshing and sliding tooth faults are prone to occur; in addition, Chinese patent CN101407186A discloses a two-way self-locking device , using an asymmetrical locking member and a non-integrated locking cam structure, this device requires high precision for the locking member and locking cam, due to the asymmetrical structure of the locking cam, it is easy to make mistakes during assembly, resulting in The pass rate is low and the cost is high; therefore, the prior art has the problems and deficiencies of poor reliability, complex structure, large body and heavy weight, and high cost

Images