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An adjustable pre-tightening device
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A fixed device and adjustable technology, used in metal processing, metal processing equipment, manufacturing tools, etc., can solve the problems of inconvenient installation and disassembly, labor-intensive, difficult to control and detect pre-tightening force and pressing force, etc. To achieve the effect of changeable structure and flexible layout
Active Publication Date: 2017-10-17
CHINA NAT HEAVY MACHINERY RES INSTCO
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Abstract
Description
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Application Information
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Problems solved by technology
[0003] These structures are very inconvenient to install and disassemble, especially when large-diameter threads are used for compression, it is difficult to control and detect the pre-tightening force and compression force, and the requirements for the success rate of one-time assembly of the equipment are high; The pressing force is fixed after completion, and automatic compensation cannot be performed after the parts are worn out
Method used
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Embodiment 1
[0027] This embodiment provides an adjustable pre-tightening device, such as figure 1 As shown, it includes a flange-shaped body 1, a slotted hole 4 is provided on one end surface of the body 1, a plunger 5 is housed in the slotted hole 4, and the plunger 5 is installed along the slotted hole 4 toward the outside of the end surface, and the slotted hole 4 and the column Plug 5 forms plunger oil cylinder.
[0028] The other end surface of the main body 1 is provided with a plurality of threaded holes, the inner end of which is connected with the slotted hole 4, and each of the threaded holes is equipped with a jacking screw 2, and the outer end of the jacking screw 2 is covered with a lock nut 3 , the lock nut 3 sits on the end surface of the body 1, and the inner end of the jacking screw 2 extends into the slot 4 through the threaded hole.
[0029] There is a hydraulic oil hole 9 on the side of the body 1, the inner end of the hydraulic oil hole 9 communicates with the slot 4...
Embodiment 2
[0033] On the basis of Embodiment 1, in this embodiment, there are multiple slots 4, which are evenly distributed on the end surface of the body 1, and the number of threaded holes on the other end surface of the body 1 is consistent with the number of slots 4, and are arranged in the axial direction. The directions correspond one to one.
[0034] In this embodiment, the slots 4 are evenly distributed in the circumferential direction. Such a structure makes the force exerted by each plunger 5 on the bearing uniform in the circumferential direction, ensuring that the preload and installation of the bearing can be carried out smoothly.
Embodiment 3
[0036] This embodiment is based on Embodiment 1, but its structure is different from that of Embodiment 2. The slotted hole 4 in this embodiment is an annular slotted ring, and the plunger 5 is also annular, and is fitted in the annular slotted hole. 4 within.
[0037] The ring-shaped slot 4 can achieve the same construction effect as the multiple slots 4 in Example 2, and the ring-shaped structure is more uniform in force than the combination of multiple slots 4, and the adjustment effect will be better .
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Abstract
The invention provides an adjustable pretightening and fixing device. The adjustable pretightening and fixing device comprises a flange-shaped body. Slotted holes are formed in one end face of the body. Plungers are arranged in the slotted holes. Plunger oil cylinders are formed by the slotted holes and the plungers. Threaded holes are formed in the other end face of the body, the inner ends of the threaded holes and the slotted holes are communicated and provided with jacking lead screws, the outer ends of the jacking lead screws are sleeved with locking nuts, and the inner ends of the jacking lead screws stretch into the slotted holes through the threaded holes. Hydraulic oil holes are formed in the side face of the body, the inner ends of the hydraulic oil holes are communicated with the slotted holes, and the outer ends of the hydraulic oil holes are connected with an oil pump through a pipeline. The adjustable pretightening and fixing device is mainly used for pretightening and fixing links of large bearing and shaft collar parts, the installing and detaching difficulty of the parts is greatly lowered through the effect of a hydraulic hoop, convenient adjusting of pretightening force and fixing force is achieved, the overload protection function is achieved, multiple times of adjusting can be achieved under the condition that equipment is not detached, and compensation for fixing force decrease caused by abrasion and other conditions can be automatically achieved.
Description
technical field [0001] The invention is mainly used for the preloading and fixing links of large bearings and collar parts, and specifically relates to an adjustable preloading and fixing device, which can be widely used in metallurgy, mining, large machine tools, port machinery and the like. Background technique [0002] When preloading and fixing traditional large collar parts (such as bearings, bushings, etc.), most of them adopt structures such as large nuts, combined nuts, glands, and tapered sleeves. [0003] These structures are very inconvenient to install and disassemble, especially when large-diameter threads are used for compression, it is difficult to control and detect the pre-tightening force and compression force, and the requirements for the success rate of one-time assembly of the equipment are high; After the completion, the pressing force is fixed, and automatic compensation cannot be performed after the parts are worn. Contents of the invention [0004...
Claims
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Application Information
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