CN100347466C

CN100347466C - Automatic tension device for belt and driving wheel

Info

Publication number: CN100347466C
Application number: CNB200510038540XA
Authority: CN
Inventors: 王文志; 左晓明; 刘远伟
Original assignee: Huaiyin Institute of Technology
Current assignee: Huaiyin Institute of Technology
Priority date: 2005-03-22
Filing date: 2005-03-22
Publication date: 2007-11-07
Anticipated expiration: 2025-03-22
Also published as: CN1657802A

Abstract

The present invention discloses an automatic tensioning device for the transmission of belts and wheels. An inner sleeve 10 is fixed in an inner hole of an outer sleeve 9 by a screw bolt 11 to form a casing, and a press cover 15, a sealing ring 14 and a sliding bearing 12 are orderly installed on a rolling screw rod 17 in series and then are together inserted into the inner hole at the big end of the casing. A rolling screw cap 8, a rolling body 7, a spring 6 and a sliding bearing 5 are fixed at the small end of the rolling screw rod 17 in the inner hole of the casing by screw caps 2, and a pressure bar 20 provided with a pressure wheel 21 is fastened at the outer end of the rolling screw rod 17 by a screw cap 18. In this way, the automatic tensioning device for the transmission of belts and wheels is formed. When a transmission wheel and a belt are loose, the pre-pressure of the spring can automatically push the screw caps to make axial movement along the rolling screw rod under the condition of not rotating, and the pressure wheel on the pressure bar is driven to apply proper pressure to the belt to automatically tension the belt and the transmission wheel, so that the stability and the efficiency of the belt and wheel transmission are enhanced.

Description

Belt wheel transmission automatic tension device

Affiliated technical field

The present invention relates to belt wheel transmission automatic tension device.

Background technique

In the belt wheel driving mechanism, common belt wheel transmission belt tensioner, belt wheel transmission belt tensioner is the important matching parts in the belt wheel drive mechanism, mainly play the tensioner effect of belt and drive wheel, common belt tensioner mainly is through leading screw adjusting, bolt with bodies such as guide rail, swing frame, depression bars, the wheelbase of master and slave moving axis is increased, reach control belt and the required expanding force of drive wheel, and satisfy transmission ratio and technical requirements relevant in the belt wheel transmission process.But because this type of device is subjected to the restriction of self structure, belt wheel driving mechanism some defectives on performance have been caused, be mainly reflected in following two aspects: elasticity or the thermal distortion that belt wheel produces in transmission process makes the belt wheel expanding force to be regulated timely on the one hand, thereby caused transmission ratio decline; On the other hand because the adjusting expanding force is installed and finished to the belt tensioner of belt wheel driving mechanism under quiescent conditions, thereby it just is difficult to satisfy the requirement of the required expanding force of belt wheel under current intelligence, cause the unstability of belt wheel transmission ratio, thereby reduced the performance of belt wheel driving mechanism.

Summary of the invention

The objective of the invention is to: a kind of belt wheel transmission automatic tension device is provided, solve the driving force decline problem that the friction factor shakiness is caused between belt and drive wheel, this belt tensioner novel structure, automatically flexibly, versatility is good, principle is unique, significantly improves belt wheel stability of transmission and work validity.

Technical solution of the present invention is: this belt tensioner is mainly assembled by housing, energy storage part, do-part, and wherein, described housing is made up of interior overcoat, by bolt interior cover is fixed in the endoporus of overcoat and forms housing; Wherein, described energy storage part is made up of sliding bearing, rolling element, spring, rolling lead screw, gland, seal ring, sliding bearing are serially connected in the big end endoporus that inserts housing on the rolling lead screw in the lump successively, with rolling nut, rolling element, spring, sliding bearing are fixed on and form the energy storage part on the small end of the rolling lead screw that is arranged in the housing endoporus by first nut; Wherein, described do-part is made up of depression bar, pinch roller, and the outer end that the depression bar that pinch roller will be installed by second nut is fastened on rolling lead screw forms do-part.

Belt tensioner of the present invention is in structure, performance, working principle is different from other belt tensioner with installing, this belt tensioner, only need disposable installation and regulate just to make belt wheel in the process of static state, regulate required expanding force automatically, particularly in the belt wheel transmission process, can guarantee that also belt wheel has suitable expanding force under the situation of generation elasticity and thermal distortion, thereby the stationarity of belt wheel transmission ratio and the efficient of belt wheel transmission have been improved, the driving mechanism transmission ratio phenomenon unstable or that descend of the belt wheel that occurs owing to the structural defective of belt wheel belt tensioner is solved, thereby make the transmission performance of belt wheel, efficient is significantly improved, and can further widen the application area of belt wheel driving mechanism.

Description of drawings

Fig. 1 is a structural representation of the present invention

Fig. 2 is the A-A sectional view of Fig. 1

Among the figure: cover, 11 bolts, 12 sliding bearings, 13 nuts, 14 seal rings, 15 glands, 16 flat keys, 17 rolling lead screws, 18 second nuts, 19 retaining pads, 20 depression bars, 21 pinch rollers, 22 bearings, 23 nuts, 24 pressure shafts, 25 belts in 1 gland, 2 first nuts, 3 retaining pads, 4 straight pins, 5 sliding bearings, 6 springs, 7 rolling elements, 8 rolling nuts, 9 overcoats, 10

Embodiment

As shown in Figure 1, 2, this belt tensioner is mainly assembled by housing, energy storage part, do-part, and wherein, described housing is made up of interior cover 10, overcoat 9, by bolt 11 interior cover 10 is fixed in the endoporus of overcoat 9 and forms housing; Wherein, described energy storage part is made up of sliding bearing 12, rolling nut 8, rolling element 7, spring 6, rolling lead screw 17, gland 15, seal ring 14, sliding bearing 12 are gone here and there successively and are contained in the big end endoporus that together inserts housing on the rolling lead screw 17, rolling nut 8, rolling element 7, spring 6, sliding bearing 5, retaining pad 3 are fixed on formation energy storage part on rolling lead screw 17 small ends that are arranged in the housing endoporus by first nut 2, bearing play and the axial clearance of adjusting housing and rolling lead screw reach standard; Wherein, described do-part is made up of depression bar 20, pinch roller 21, by second nut 18 outer end that the depression bar 20 that installs pinch roller 21 is fastened on rolling lead screw 17 is formed do-part.

This device has separately again axial motion is converted to according to rolling lead screw and rolling nut no interlocking capability in transmission process mutually and rotatablely moves, and this particular performances designs.

In installation, earlier overcoat 9 is fixed on the main frame, allow pinch roller 21 compress belt 25 again, limiting rolling lead screw 17 simultaneously rotates, again interior cover 10 is done postive direction rotation and drive 8 rotations of rolling nut, it is moved axially and holddown spring 6 as a left side along rolling lead screw 17, when the stroke of the pressure of spring and rolling nut reaches requirement, with bolt 11 that interior cover is fixing on the coat, promptly finish the assembling of belt wheel belt tensioner and main frame.

At work, when drive wheel and belt have when loosening, the precompression of spring can promote the rolling nut automatically and do right axial motion along rolling lead screw under non-rotary situation, and the effect by rolling element makes rolling lead screw realize the postive direction rotation, the pinch roller that drives on the depression bar produces suitable pressure to belt, make belt and drive wheel automatic tension, thereby guaranteed that belt still has high friction coefficient with drive wheel under the state of elasticity and thermal distortion, improved belt wheel stability of transmission and transmission efficiency.

This device is widely used in various belt wheel driving mechanism and chain type transmission mechanism.

Claims

1. belt wheel transmission automatic tension device, it is characterized in that: this belt tensioner is mainly assembled by housing, energy storage part, do-part, wherein, described housing has overcoat (9), interior cover (10) to form, and by bolt (11) interior cover (10) is fixed in the endoporus of overcoat (9) and forms housing; Wherein, described energy storage partly has sliding bearing (12), rolling nut (8), rolling element (7), spring (6), rolling lead screw (17) to form, gland (15), seal ring (14), sliding bearing (12) are gone here and there successively and are contained in the big end endoporus that together inserts housing on the rolling lead screw (17), by first nut (2) rolling nut (8), rolling element (7), spring (6), sliding bearing (5) are fixed on and form the energy storage part on rolling lead screw (17) small end that is arranged in the housing endoporus; Wherein, described do-part has depression bar (20), pinch roller (21) to form, and by second nut (18) outer end that the depression bar that installs pinch roller (21) (20) is fastened on rolling lead screw (17) is formed do-part.