A suspension assembly, comprising: a suspension plate; a right arm assembly pivotally coupled to the suspension plate; a left arm assembly pivotally coupled to the suspension plate; a first engaging member fixedly mounted on the right arm assembly; a second engaging member fixedly mounted on the left arm assembly; and a locking module fixedly mounted on the suspension plate and configured to engage and disengage the first engaging member and the second engaging member, wherein the locking module comprises: a housing fixed to the suspension plate; a first locking member slidably disposed in the housing and configured to engage and disengage the first engaging member; characterised in that a second locking member slidably disposed in the housing and configured to engage and disengage the second engaging member, further comprising a moving member slidably disposed in the housing, wherein the moving member is configured to move the first locking member and the second locking member, wherein the moving member is configured to move between a first position and a second position relative to the housing, and the moving member moves toward the first locking member and the second locking member while moving from the first position to the second position, wherein the moving member is configured to push the first locking member and the second locking member to move toward each other while moving from the first position to the second position, and wherein the locking module further comprises a resilient member located between and abutted against the first locking member and the second locking member. a suspension plate; a right arm assembly pivotally coupled to the suspension plate; a left arm assembly pivotally coupled to the suspension plate; a first engaging member fixedly mounted on the right arm assembly; a second engaging member fixedly mounted on the left arm assembly; and a locking module fixedly mounted on the suspension plate and configured to engage and disengage the first engaging member and the second engaging member, wherein the locking module comprises: a housing fixed to the suspension plate; a first locking member slidably disposed in the housing and configured to engage and disengage the first engaging member; characterised in that a second locking member slidably disposed in the housing and configured to engage and disengage the second engaging member, further comprising a moving member slidably disposed in the housing, wherein the moving member is configured to move the first locking member and the second locking member, wherein the moving member is configured to move between a first position and a second position relative to the housing, and the moving member moves toward the first locking member and the second locking member while moving from the first position to the second position, wherein the moving member is configured to push the first locking member and the second locking member to move toward each other while moving from the first position to the second position, and wherein the locking module further comprises a resilient member located between and abutted against the first locking member and the second locking member. a housing fixed to the suspension plate; a first locking member slidably disposed in the housing and configured to engage and disengage the first engaging member; characterised in that a second locking member slidably disposed in the housing and configured to engage and disengage the second engaging member, further comprising a moving member slidably disposed in the housing, wherein the moving member is configured to move the first locking member and the second locking member, wherein the moving member is configured to move between a first position and a second position relative to the housing, and the moving member moves toward the first locking member and the second locking member while moving from the first position to the second position, wherein the moving member is configured to push the first locking member and the second locking member to move toward each other while moving from the first position to the second position, and wherein the locking module further comprises a resilient member located between and abutted against the first locking member and the second locking member.