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南昌航空大學科技學院學士學位畢業(yè)論文
摩托車專用升降平臺設計
學生姓名：王浩 班級：0781053
指導老師：袁寧
摘要: 升降臺的種類很多，按照升降結(jié)構(gòu)的不同，可分為剪叉式升降臺、升縮式升降臺、套筒式升降臺、升縮臂式升降臺及折臂式升降臺等。液壓升降臺采用液壓驅(qū)動，整機由主機、液壓系統(tǒng)、控制系統(tǒng)組成。
本文所介紹的摩托車專用升降臺最大載重量是500kg，它有兩部分組成：剪叉機構(gòu)和液壓系統(tǒng)。剪叉機構(gòu)的操作控制是由腳踏式液壓泵和液壓缸來完成的。這樣的液壓升降臺的設計通常根據(jù)設計參數(shù)要求，粗略估算剪叉尺寸，然后求出液壓缸推力，從而進行液壓缸選型。由于液壓缸的尺寸及擺放的位置不同，設計當中可能會產(chǎn)生干涉。解決的辦法是通過對機構(gòu)中三種液壓缸布置方式的分析和比較，確立一種方案，并根據(jù)需要，設計最優(yōu)的剪叉機構(gòu)，及對連接零件、滑動裝置的選型等。在滿足機構(gòu)設計的基礎上，對受力較大的機構(gòu)進行強度和剛度的校核，檢驗是否滿足設計要求。作為控制系統(tǒng)，液壓系統(tǒng)的設計很重要，這包括回路保壓設計，液壓泵的選取及其他元件的選型等。最終完成摩托車專用升降臺的設計。本設計借鑒了相關的資料，采用了相關的標準，充分的吸收了前人的寶貴的經(jīng)驗。
關鍵詞：升降臺，液壓系統(tǒng)，剪叉機構(gòu)，腳踏式液壓泵，液壓缸
指導老師簽名：
THE DESIGN OF THE LIFT TABLE
RESERVED FOR MOTOR BICYCLE
Student name:Wang Hao Class:0781053
Supervisor:Yuan Ning
Abstract : There are many types of lift table, according to the structure of the different movements ,which can be divided into scissors-lifts or shrink-lifts ,sleeve-lifts or shrink arm lifts and arm –folding lifts and so on . The hydraulic pressure actuation is used in hydraulic pressure lift table, and the whole machine was made of the main body, the hydraulic system and the control system.
Maximal load capacity of hydraulic press described by this paper is 500 kg , it has two parts: this scissors fork and hydraulic pressure system. This operation of the scissors fork is under the control of foot-operated hydraulic pump and hydraulic cylinder.Such hydraulic lifts are usually designed in accordance with the requirements of the design parameters, then the hydraulic cylinder thrust force is extracted by the sketchy estimate size.Thus the typle of the hydraulic cylinder can be sure. As the size of hydraulic cylinders and the positions for securing are different, it possibly have the interference in the design. The solution is to establish a programe through the analysis and comparison in the hydraulic cylinder layout.According to the need, we can design the optimal scissors fork, and select the connector of parts, sliding devices and so on. In the foundation of the design,the intensity and the rigidity examination to the large stress organization should bemade to examine whether that satisfy the design requirements. As the control system, hydraulic system's design is very important, including the design of the return route for guarantee presses, hydraulic pump's selection and other part's shaping and so on. In the entire process, the floor fluctuation and the turn over complete by hydraulic cylinder's expansion.Finally,the design of the lift table reserved for motor bicycle is completed.The design draws lessons from the pertinent data, has adopt the pertinent standard,and admit sufficiently the prehominid precious experience.
Keywords: lift table, hydraulic system, scissors fork mechanism, foot-operated hydraulic pump, hydraulic cylinder
Signature of Supervisor: