Steel ball tensioning type locking mechanism and size design method thereof
A locking mechanism and steel ball tightening technology, applied in structural parts, battery/battery traction, electric vehicles, etc., can solve the problems of high probability of locking mechanism unlocking or locking failure, affecting the replacement efficiency of quick-change battery packs, etc. , to achieve the effect of improving replacement efficiency and reducing failure probability
Active Publication Date: 2021-12-07
北京胜能能源科技有限公司
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[0004] The purpose of the present invention is to provide a steel ball tension locking mechanism and its size design method, so as to precisely design the size of the steel ball tension locking mechanism, and solve the problem that the locking mechanism has a high probability of unlocking or locking failure and has a rapid impact. The replacement efficiency of the battery pack
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[0035] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.
[0036] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components or the interaction relationship between two ...
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The invention belongs to the technical field of matching mechanism size design, and discloses a steel ball tensioning type locking mechanism and a size design method thereof. The method comprises the steps: firstly, determining the fit tolerance epsilon between a vehicle body end and a battery pack end, and determining the fit clearance zeta between a lock pin and a lock pin box; then presetting an unlocking stroke x, the groove depth h of a steel ball locking groove and the radius r of a steel ball; calculating the inclined angle alpha of the conical surface of the lock body; and then determining the height H between the topmost surface of the steel ball retainer and the groove center of the steel ball locking groove, the radius R of the lock pin and the radial clearance eta between the lock pin and the steel ball retainer, calculating the outer diameter R' of the topmost surface of the steel ball retainer, and if R'-R is greater than r-h, acquiring the groove depth h and the unlocking stroke x which meet the requirements. The size of the steel ball tensioning type locking mechanism is precisely designed, the unlocking stroke x and the groove depth h of the locking groove meet the strength requirement of the locking mechanism, the unlocking or locking failure probability of the locking mechanism can be reduced, and the replacement efficiency of the quick-change battery is improved.
Description
technical field [0001] The invention relates to the technical field of dimensional design of a matching mechanism, in particular to a steel ball tension locking mechanism and a dimensional design method thereof. Background technique [0002] In order to solve the problems that the charging time of electric vehicles is too long, which affects the travel schedule of car owners and the mileage demand, electric vehicles can realize fast battery replacement is a mainstream solution at present. The quick-change battery pack is a battery pack that can be quickly replaced for electric vehicles. Unlike the fixed battery pack, the quick-change battery pack can quickly separate the car pack, and the locking mechanism is to realize the connection and separation of the car pack. important components. [0003] Commonly used locking mechanisms include steel ball tensioning locking mechanisms. Affected by the structure and dimensional design accuracy of steel balls and their associated par...
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IPC IPC(8): B60K1/04B60L50/60H01M50/244H01M50/249H01M50/264
CPCB60K1/04B60L50/66H01M50/244H01M50/249H01M50/264B60K2001/0455Y02E60/10Y02T10/70
Inventor 石岩石李玉军侯艳丽高敏胡万泉李飞郑小龙
Owner 北京胜能能源科技有限公司