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南昌航空大學(xué)科技學(xué)院學(xué)士學(xué)位畢業(yè)論文
摩托車專用升降平臺(tái)設(shè)計(jì)
學(xué)生姓名：王浩 班級(jí)：0781053
指導(dǎo)老師：袁寧
摘要: 升降臺(tái)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(tái)、升縮式升降臺(tái)、套筒式升降臺(tái)、升縮臂式升降臺(tái)及折臂式升降臺(tái)等。液壓升降臺(tái)采用液壓驅(qū)動(dòng)，整機(jī)由主機(jī)、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(tái)最大載重量是500kg，它有兩部分組成：剪叉機(jī)構(gòu)和液壓系統(tǒng)。剪叉機(jī)構(gòu)的操作控制是由腳踏式液壓泵和液壓缸來(lái)完成的。這樣的液壓升降臺(tái)的設(shè)計(jì)通常根據(jù)設(shè)計(jì)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(jìn)行液壓缸選型。由于液壓缸的尺寸及擺放的位置不同，設(shè)計(jì)當(dāng)中可能會(huì)產(chǎn)生干涉。解決的辦法是通過(guò)對(duì)機(jī)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(shè)計(jì)最優(yōu)的剪叉機(jī)構(gòu)，及對(duì)連接零件、滑動(dòng)裝置的選型等。在滿足機(jī)構(gòu)設(shè)計(jì)的基礎(chǔ)上，對(duì)受力較大的機(jī)構(gòu)進(jìn)行強(qiáng)度和剛度的校核，檢驗(yàn)是否滿足設(shè)計(jì)要求。作為控制系統(tǒng)，液壓系統(tǒng)的設(shè)計(jì)很重要，這包括回路保壓設(shè)計(jì)，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(tái)的設(shè)計(jì)。本設(shè)計(jì)借鑒了相關(guān)的資料，采用了相關(guān)的標(biāo)準(zhǔn)，充分的吸收了前人的寶貴的經(jīng)驗(yàn)。
關(guān)鍵詞：升降臺(tái)，液壓系統(tǒng)，剪叉機(jī)構(gòu)，腳踏式液壓泵，液壓缸
指導(dǎo)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: