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Retractable arm slide block assembly and retractable arm
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A telescopic arm and slider technology, applied in the field of telescopic arms
Active Publication Date: 2013-05-22
山东鲁班机械科技有限公司
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[0004] Chinese patent 201120204716.5 discloses an elastic body that keeps the slider in constant contact with the telescopic body. Its structure is like Figure 4, obviously, during the telescopic stroke, the telescopic friction resistance of this slider device is large
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Embodiment 1
[0042] 1) Heat to 250°C in a vacuum heat treatment furnace and hold for 30 minutes, continue to heat to 540°C, and hold for 60 minutes, continue to heat to 990°C, and hold for 250 minutes, slowly cool to 660°C, hold for 120 minutes, and slowly cool to 530 Baked out below ℃, sprayed for rapid cooling after coming out;
[0043] 2) Then put it into the nitrogen furnace, heat it to 260°C, and keep it warm for 60 minutes, continue to heat it to 520°C, and keep it warm for 180 minutes, then cool the furnace to 300°C and then quickly air cool it under the direct blowing of the fan;
[0044] 3) Then put it into a 90KW box-type resistance furnace for heating, heat it to 200°C, keep it warm for 300min, and then take it out of the furnace to air-cool or furnace-cool.
[0045] After the above treatment, the slider body, guide sleeve and slider, compared with untreated high-chromiumcast iron, have Rockwell hardness HRC>60, and the wear resistance is improved by at least 34%, which increas...
Embodiment 2
[0047] 1) Heat to 260°C in a vacuum heat treatment furnace, keep it for 35 minutes, continue heating to 540°C, keep it for 70 minutes, continue heating to 1000°C, keep it for 250 minutes, slowly cool to 660°C, keep it for 120 minutes, and slowly cool to 530 Baked out below ℃, sprayed for rapid cooling after coming out;
[0048] 2) Put it into the nitrogen furnace again, heat it to 260°C, and keep it warm for 60 minutes, continue to heat it to 520°C, and keep it warm for 190 minutes, then cool the furnace to 300°C and then quickly air cool it under the direct blowing of the fan;
[0049] 3) Then put it into a 90KW box-type resistance furnace for heating, heat it to 200°C, keep it warm for 300min, and then take it out of the furnace to air-cool or furnace-cool.
[0050] After the above treatment, the slider body, guide sleeve and slider, compared with untreated high-chromiumcast iron, have Rockwell hardness HRC>60, and the wear resistance is improved by at least 34%, which incr...
Embodiment 3
[0052] 1) Heat to 270°C in a vacuum heat treatment furnace, keep it for 40 minutes, continue heating to 540°C, keep it for 80 minutes, continue heating to 1010°C, keep it for 250 minutes, slowly cool to 660°C, keep it for 120 minutes, and slowly cool to 530 Baked out below ℃, sprayed for rapid cooling after coming out;
[0053] 2) Then put it into the nitrogen furnace, heat it to 260°C, and keep it warm for 60 minutes, continue to heat it to 520°C, and keep it warm for 200 minutes, then cool the furnace to 300°C and then quickly air-cool it under the direct blowing of the fan;
[0054] 3) Then put it into a 90KW box-type resistance furnace for heating, heat it to 200°C, keep it warm for 300min, and then take it out of the furnace to air-cool or furnace-cool.
[0055] After the above treatment, the slider body, guide sleeve and slider, compared with untreated high-chromiumcast iron, have Rockwell hardness HRC>60, and the wear resistance is improved by at least 34%, which incre...
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Abstract
The invention discloses a retractable arm slide block assembly which has long service life and excellent performance. Slide block bodies are supported between two pin shaft seats by a transverse pin shaft in a swinging manner; the slide block bodies at the two sides of the vertical direction of the pin shaft are respectively provided with two sets of rolling friction assemblies; each set of the rolling friction assembly comprises a containing cavity which is located in the slide block body and is used for containing lubricating grease, and a guide hole for vertically penetrating through the slide block body; each guide hole contains a guide sleeve which is slidingly matched with the guide hole; each guide sleeve contains a slide block which is slidingly matched with an inner hole of the guide sleeve; and the slide blocks and the guide sleeves commonly contain a rolling ball body. The invention further discloses a retractable arm for mounting the slide block assembly. In a retraction route, the rolling friction of the rolling ball body realizes the relative retraction of an inner arm and an outer arm so that the retraction friction resistance is reduced and the retraction smoothness is enhanced. When a head stressing part of the inner arm is at a working state, the rolling friction assemblies are stressed to be retracted into the slide block bodies so that the slide block bodies are contacted with an outer wall face, the contact pressure is small and the slide block bodies and the inner and outer arms are protected.
Description
technical field [0001] The invention relates to a telescopic arm on construction machinery equipment, in particular to a slider assembly of the telescopic arm. Background technique [0002] Cranes, aerial work vehicles, forklifts and other engineering machinery and equipment all have telescopic arms. The telescopic arms include multi-section nested joint arms, and sliders are arranged between adjacent two joint arms (the material of the sliders is mostly nylon). It is used to realize the overlapping and smoothness of expansion and contraction between two adjacent arms. For the convenience of description, the two adjacent arms are respectively referred to as the inner arm and the outer arm. figure 1 It is a structural schematic diagram of a slider and a joint arm of a typical telescopic arm. The inner arm 1 is embedded in the outer arm 2, the upper slider 3 and the lower slider 4 are installed at the end of the inner arm 1, and the lower slider 5 is installed at the hea...
Claims
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Application Information
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