CN200999837Y

CN200999837Y - Mechanism for regulating belt elasticity with two stage belt transmission and application thereof

Info

Publication number: CN200999837Y
Application number: CNU200720105632XU
Authority: CN
Inventors: 宋希万
Original assignee: ZHONGQIANG ELECTRIC TOOLS CO Ltd
Current assignee: ZHONGQIANG ELECTRIC TOOLS CO Ltd
Priority date: 2007-01-18
Filing date: 2007-01-18
Publication date: 2008-01-02
Anticipated expiration: 2017-01-18

Abstract

The utility model relates to a two stage belt tension adjusting mechanism with transmission. The utility model is characterized in that the utility model comprises a fist clipping plate, a second clipping plate, an installing plate, and a pressing sleeve pipe; the first clipping plate and the second clipping plates are arranged in parallel and at intervals, and the both ends of the medium rotating axle are respectively arranged on the first clipping plate and the second clipping plate; one end of the installing plate is hinged on the frame in a rotary way, and at least two waist shaped slot openings with the same direction and at least two arc slot openings are arranged on the installing plate; a bolt is penetrated through the second clipping plate, the pressing sleeve pipe and the waist shaped slot opening on the installing plate in sequence and connected with the first clipping plate through thread; a bolt is penetrated through the arc slot opening on the installing plate and connected with the frame through thread. Through the motion of the installing plate, the adjusting mechanism enables the medium rotating axle to be changed oppositely to the position of the first transmission wheel and the second transmission wheel, therefore to change the medium big wheel and the medium small wheel and the central distance of the first transmission wheel and the second transmission wheel, reaching the purpose of belt tensioning.

Description

The belt tightness adjustment mechanism and the application of the transmission of two-stage band

Technical field

The utility model relates to a kind of belt tightness adjustment mechanism with transmission, relates in particular to the belt tightness adjustment mechanism and the application on mitre saw or bench saw equipment thereof of a kind of two-stage band transmission.

Background technique

The band transmission is widely used in the various mechanical fields, the degree of tightness of belt directly influences efficient, the life-span of transmission in the band transmission, therefore it is very important keeping the effective tension force of belt in the band transmission, non-slip to guarantee to be with, and guarantees that belt does not produce " climbing tooth " in running up.

Keep the device of the effective tension force of belt to have a lot, the most generally lean against the inside of belt or outside partially to cause tension force by one or more idle pulleys, and at idle pulley and used between the support of device of pulley system and be provided with spring, this spring applies one all the time against the power of belt to idle pulley.

Also having a patent No. is that the Chinese utility model patent " bidirectional belt tensioning approach " of ZL200410091793.9 (notification number is CN1621712Y) has disclosed the movable belt drive in a kind of center, and it uses bias voltage moment to come to cause the tensioning of regulating automatically and being redirected in belt and pulley system to make a concerted effort.Embodiment has a motor, and this motor is installed on the motor plate, and this motor plate freedom is installed on the support of a device that has adopted tension device pivotally.This motor is connected with a driving wheel via a belt and drives a follower, and this belt passes driving wheel and follower.First bias mechanism makes driving wheel depart from follower, thereby provides bias voltage moment M inclined to one side.Embodiment uses a Hookean spring, provides a biasing force F inclined to one side, and be installed at a distance of one at fulcrum inclined to one side apart from d, thereby provide bias voltage moment M inclined to one side around fulcrum.Perhaps, embodiment uses a torsion spring, and it is installed into around fulcrum provides bias voltage moment M inclined to one side.Embodiment also can adopt second bias mechanism so that follower departs from driving wheel.

No matter be prevailing tension device, or the tensioning method that above-mentioned model utility relates to, it must be provided with idle pulley or bias mechanism on every drivign belt, if above-mentioned driving mechanism is a secondary band transmission, so just must want two or two with upper idler or bias mechanism at least, and because existing tension device all needs spring or other similar elastic component, and elastic component is yielding in use for some time, and lose original elastic force, so its working life is short, moreover if idle pulley or support that the bearing quality of idle pulley is bad and can influence its effectively tension force of maintenance belt, and idle pulley has certain frictional force to belt, so belt can easier heating.

In sum, existing belt slack adjuster is not suitable on the mechanical device of secondary band transmission.

Summary of the invention

Technical problem to be solved in the utility model is the belt tightness adjustment mechanism that the transmission of a kind of two-stage band is provided at above-mentioned prior art present situation, this degree of tightness controlling mechanism can be regulated the degree of tightness of two belts in the transmission of secondary band simultaneously, it can rationally regulate the degree of tightness of belt, and it is also very convenient to change belt.

Another technical problem to be solved in the utility model is the application of the belt tightness adjustment mechanism of above-mentioned two-stage band transmission on the compound saw of upset.

The utility model solves the problems of the technologies described above the technological scheme that is adopted: the belt tightness adjustment mechanism of a kind of two-stage band transmission, include framework, first drive wheel, second drive wheel, intermediate rotary shaft, middle bull wheel and middle steamboat, first drive wheel links to each other with the rotating shaft that is arranged in framework, second drive wheel links to each other with the output revolving shaft that is arranged in framework, middle bull wheel and middle steamboat are assemblied on the intermediate rotary shaft and can rotate with intermediate rotary shaft, link to each other by first belt between the middle bull wheel and first drive wheel, link to each other by second belt between the middle steamboat and second drive wheel; It is characterized in that: also include first clamping plate, second clamping plate, mounting plate, clamp sleeve, screw; First clamping plate and the second clamping plate parallel interval are provided with, and described intermediate rotary shaft one end is located on first clamping plate by bearing, and the other end of intermediate rotary shaft also is located on second clamping plate by bearing; Mounting plate and clamp sleeve are arranged between first clamping plate and second clamping plate, have the perforation that can supply the intermediate rotary shaft activity to pass on mounting plate; One end of mounting plate is hinged on the framework rotationally, is provided with two kidney slot holes towards unanimity on the mounting plate at least, and also being provided with two on the mounting plate at least is the center of circle and the identical arc-shaped slot of the radius of gyration with the articulating point of mounting plate and framework all; Screw is threaded with first clamping plate after passing kidney slot hole on second clamping plate, clamp sleeve, the mounting plate successively, and described screw matches with the kidney slot hole and can the hole slippage of relative kidney slot; Screw is threaded with framework after passing arc-shaped slot on the mounting plate, and described screw matches with arc-shaped slot and radian direction slippage that can relative arc-shaped slot.

After the first belt degree of tightness is regulated, can not influence at preceding second belt that has regulated degree of tightness and exert an influence, the above-mentioned mounting plate and the articulating point of framework are good to close on output revolving shaft.Certainly the best can also be the center coincidence of articulating point output revolving shaft, and the degree of tightness of regulating first belt so can be to not exerting an influence with second belt that regulates degree of tightness.

One end of above-mentioned mounting plate is provided with a circular hole, has a screw activity to pass behind the circular hole and framework is threaded, and described mounting plate screw relatively rotates.Certainly also can adopt existing other mode that is rotatably connected, connect as pivot pin.

Have a stepped part on the above-mentioned screw, this stepped portions is in the circular hole of mounting plate, and described mounting plate can described relatively stepped part rotation.Adopt this gear structure of stepped part, can prevent that this screw from crossing tightly is connected with framework, and then influence mounting plate rotating relative to screw, because the existence of stepped part, so must have certain spacing between mounting plate and the framework face, the thickness of this spacing and stepped part is identical, and the thickness of the thickness of stepped part and mounting plate is identical or slightly thick, so the relative screw turns of mounting plate is more prone to.

Above-mentioned kidney slot hole is to have two for good.Can rationally distribute each slotted eye on the mounting plate, be unlikely to mounting plate do too big, the kidney slot hole also can be three or morely certainly, it according to circumstances is provided with, the number in kidney slot hole is many can to make the relative slippage of mounting plate steady.

For rationally the kidney slot hole being arranged on the mounting plate, above-mentioned arc-shaped slot is to have two for good, and it lays respectively at the both sides in kidney slot hole.Arc-shaped slot also can be in both sides, kidney slot hole, and it comes layout as required to be prerequisite with arc-shaped slot, kidney slot hole reasonable Arrangement on mounting plate.

On the intermediate rotary shaft side face between the mounting plate and second clamping plate, have and partly to form middle steamboat for the locating tooth of second belt location so that have the intermediate rotary shaft of locating tooth.Because it is a kind of reducing gear for a two-stage band transmission transmission device, so steamboat should be less in the middle of it, locating tooth is set with steamboat in the middle of forming on intermediate rotary shaft part side face, be the cocoa simplified structure like this, reduce production costs and and ease of assembly, also steamboat in the middle of directly on intermediate rotary shaft, being provided with certainly.

A kind of equipment that is provided with the belt tightness adjustment mechanism of two-stage band as claimed in claim 1 transmission, include motor, saw blade, the rotating shaft that it is characterized in that described motor links to each other with first drive wheel, first drive wheel can rotate with the rotating shaft of motor, described saw blade links to each other with the output revolving shaft that is arranged in framework, and saw blade can rotate with output revolving shaft.The said equipment can be mitre saw, bench saw or the compound saw that overturns, this is the application of belt tightness adjustment mechanism on various saw equipments of this two-stage band transmission, certainly its be not limited to cut sth. askew, application on bench saw or the compound saw equipment that overturns, can be widely used in variously needs to use the transmission of two-stage band to reach in the various device of deceleration purpose.

Compared with prior art, advantage of the present utility model is: the belt tightness adjustment mechanism of this two-stage band transmission is by the action of mounting plate, so that the position change of relative first drive wheel of intermediate rotary shaft and second drive wheel, and then bull wheel and the middle steamboat change of the centre distance of relative first drive wheel and second drive wheel simultaneously in the middle of changing, finally reach the purpose of belt degree of tightness; Because its need can reach the purpose of condition belt degree of tightness by the action of mounting plate and intermediate rotary shaft, so easy to adjust; Change belt then only need unload connect first clamping plate and second clamping plate and be positioned at the second belt outside screw, just can change, so change conveniently belt.

Description of drawings

Fig. 1 is applied in structural representation on the mitre saw for the utility model embodiment;

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

Fig. 3 is the structural representation of mounting plate among the utility model embodiment;

Fig. 4 is the principle schematic when regulating second belt among the utility model embodiment;

Fig. 5 is the principle schematic when regulating first belt among the utility model embodiment.

Embodiment

Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.

Be depicted as an embodiment of the present utility model as Fig. 1～3, it is a kind of mitre saw that is applied in, the belt tightness adjustment mechanism of the two-stage band transmission on the bench saw or the compound saw that overturns, include framework 1, first drive wheel 2, second drive wheel 3, intermediate rotary shaft 4, middle bull wheel 5, middle steamboat 6, motor 20, saw blade 21, the profile of framework 1 and big I design as required, its mainly be applied on what mechanical structure this controlling mechanism relevant, the rotating shaft 11 that generally is fixed with motor 20 and power supply machine 20 on the shell 1 is passed, and generally also is fixed with output revolving shaft 12 on the shell 1;

The rotating shaft 21 of described first drive wheel 2 and the motor 20 that is arranged in framework 1 links to each other, second drive wheel 3 links to each other with an end of the output revolving shaft 12 that is arranged in framework 1, the other end of output revolving shaft 12 links to each other with saw blade 21 and can be with output revolving shaft 12 rotation, middle bull wheel 5 is assemblied on the intermediate rotary shaft 4 by the key ways of connecting and can rotates with intermediate rotary shaft 4, link to each other by first belt 13 between the middle bull wheel 5 and first drive wheel 2, link to each other by second belt 14 between the middle steamboat 6 and second drive wheel 3, this two-stage band drive mechanism is similar with the structure and the effect of general belt reducing gear, middle bull wheel 5 is parts independently, because the middle steamboat 6 that relates in this embodiment is less, so on intermediate rotary shaft 4 intermediate portion side faces, be provided with a circle locating tooth with steamboat 6 in the middle of forming, the external diameter of middle steamboat 6 is identical with intermediate rotary shaft 4 external diameters, and certainly middle steamboat 6 can be independent parts;

The belt tightness adjustment mechanism of this two-stage band transmission also includes first clamping plate 7, second clamping plate 8, mounting plate 9, clamp sleeve 10;

First clamping plate 7 and the 8 parallel interval settings of second clamping plate, described intermediate rotary shaft 4 one ends are located on first clamping plate 7 by bearing 15, and the other end of intermediate rotary shaft 4 also is located on second clamping plate 8 by bearing 16; Mounting plate 9 and clamp sleeve 10 are arranged between first clamping plate 7 and second clamping plate 8, have to pass and diameter is equivalent to two bearing supports greater than perforation 91, the first clamping plate 7 and second clamping plate 8 of intermediate rotary shaft 4 diameters for intermediate rotary shaft 4 activities on mounting plate 9;

One end of mounting plate 9 is hinged on the framework 1 rotationally, one end of mounting plate 9 closes on output revolving shaft 12 places and is provided with a circular hole 94, there are a screw 19 activities to pass circular hole 94 back and framework 1 is threaded, on screw 19, has a stepped part 191, this stepped part 191 is positioned at circle 94 holes of mounting plate 9, and described mounting plate 9 can described relatively stepped part 191 rotate;

Also be provided with two kidney slot holes 92 on the mounting plate 9 towards unanimity, kidney slot hole 92 towards roughly consistent with second drive wheel 3 and middle steamboat 6 centerline directions, the back, kidney slot hole 92 that has screw 17 to pass successively on second clamping plate 8, clamp sleeve 10, the mounting plate 9 is threaded with first clamping plate 7, and described screw 17 and kidney slot hole 92 match also can 92 slippages of relative kidney slot hole;

Also being provided with two on the mounting plate 9 is the identical arc-shaped slot 93 of the center of circle and the radius of gyration with the articulating point of mounting plate 9 and framework 1 all, it lays respectively at the both sides in kidney slot hole 92, arc-shaped slot 93 back that has screw 18 to pass on the mounting plate 9 is threaded with framework 1, described screw 18 and arc-shaped slot 93 match also can relative arc-shaped slot 93 the slippage of radian direction.

Certainly this degree of tightness controlling mechanism be not limited to cut sth. askew, application on bench saw or the compound saw equipment that overturns, can be widely used in variously needs to use the transmission of two-stage band to reach in the various device of deceleration purpose.

Working principle of the present utility model and process are such:

As shown in Figure 4, when needing to regulate the belt degree of tightness, at first to regulate the centre distance between second drive wheel 3 and the intermediate rotary shaft 4 earlier, to regulate the degree of tightness of second belt 14, the screw 17 that will connect first clamping plate 7 and second clamping plate 8 during adjusting is unscrewed, clamp sleeve 10 just can tightly not be resisted against on the mounting plate 9 like this, and the screw 18 that passes arc-shaped slot 93 still tightly is pressed on the framework 1, so mounting plate 9 does not move relative to framework 1, this moment first clamping plate 7, second clamping plate 8, intermediate rotary shaft 4, middle steamboat 6, middle bull wheel 5 forms integrative-structure, can integral body be that mounting plate 9 moves relative to kidney slot hole 92, at this moment the centre distance between second drive wheel 3 and the intermediate rotary shaft 4 then can become big or diminish, until being adjusted to suitable centre distance, the degree of tightness intensity of second belt 14 is fit to, then tighten the screw 17 that passes kidney slot hole 92, so that clamp sleeve 10 will tightly be resisted against on the mounting plate 9, this moment first clamping plate 7, second clamping plate 8, intermediate rotary shaft 4, middle steamboat 6, middle bull wheel 5, mounting plate 9 forms an overall structure, centre distance between second drive wheel 3 and the intermediate rotary shaft 4 no longer changes, and second belt, 14 degrees of tightness are regulated and finished;

As shown in Figure 5, because the centre distance of second drive wheel 3 and intermediate rotary shaft 4 changes, so the centre distance between the intermediate rotary shaft 4 and first drive wheel 2 also can change, so first belt, 13 degrees of tightness also need to regulate, earlier the screw 17 of first clamping plate 7 and second clamping plate 8 is tightened during adjusting, clamp sleeve 10 will tightly be resisted against on the mounting plate 9 like this, this moment first clamping plate 7, second clamping plate 8, intermediate rotary shaft 4, middle steamboat 6, middle bull wheel 5, mounting plate 9 forms an overall structure, unscrew the screw 18 that passes arc-shaped slot 93 again, again owing on the mounting plate 9 two arc-shaped slots 93 are arranged, they are to be the center of circle and identical with screw 19 distance with screw 19, still can screw 19 rotate mounting plate 9 within the specific limits for the center of circle, intermediate rotary shaft 4 also moves with mounting plate 9, close on output revolving shaft 12 because pass the screw 19 of circular hole 94 on the mounting plate 9, so moving seldom of mounting plate 9 to the influence of the centre distance between the middle rotating shaft 4 and second drive wheel 3, be controlled in the margin of error, so the rotation of mounting plate 9 can not exert an influence to the degree of tightness with second belt 14 that regulates, centre distance between first drive wheel 2 and the intermediate rotary shaft 4 then can become big or diminish, rotate mounting plate 9 to correct position, with the centre distance of adjusting between first drive wheel 2 and the intermediate rotary shaft 4 the degree of tightness intensity of first belt 13 is fit to, and then tighten the screw 18 that passes arc-shaped slot 93, also framework 1 is fixing relatively to make mounting plate 9, and first belt, 13 degrees of tightness are regulated and finished;

When changing first belt 13, direct dismounting and change then, when changing second belt 14, then only need unload and be positioned at the screw 17 that second belt 14 connects first clamping plate 7 and second clamping plate 8, unload clamp sleeve 10 again, first clamping plate 7, second clamping plate 8, screw 17 just do not form the space of sealing at this moment, just can unload second belt 14.

At last, first belt 13 and second belt, 14 degrees of tightness all reach designing requirement, and whole adjustment process finishes.

This controlling mechanism does not relate to the structure of spring or idle pulley all the time, can not produce owing to idle pulley has certain frictional force to make the belt can easier heating to belt, and need not original tension structure all is set on every belt, simplify the structure, also made things convenient for assembling.

Certainly this relate to controlling mechanism be not limited to cut sth. askew, application on bench saw or the compound saw equipment that overturns, can be widely used in variously needs to use the transmission of two-stage band to reach in the various machinery of deceleration purpose.

Claims

1, the belt tightness adjustment mechanism of a kind of two-stage band transmission, include framework (1), first drive wheel (2), second drive wheel (3), intermediate rotary shaft (4), middle bull wheel (5) and middle steamboat (6), first drive wheel (2) links to each other with the rotating shaft that is arranged in framework (11), second drive wheel (3) links to each other with the output revolving shaft that is arranged in framework (12), the intermediate rotary shaft (4) that is assemblied in middle bull wheel (5) and middle steamboat (6) goes up and can rotate with intermediate rotary shaft (4), link to each other by first belt (13) between middle bull wheel (5) and first drive wheel (2), link to each other by second belt (14) between middle steamboat (6) and second drive wheel (3);

It is characterized in that: also include first clamping plate (7), second clamping plate (8), mounting plate (9), clamp sleeve (10), screw (17,18);

First clamping plate (7) and second clamping plate (8) parallel interval setting, described intermediate rotary shaft (4) one ends are located on first clamping plate (7) by bearing (15), and the other end of intermediate rotary shaft (4) also is located on second clamping plate (8) by bearing (16);

Mounting plate (9) and clamp sleeve (10) are arranged between first clamping plate (7) and second clamping plate (8), have the perforation (91) that can supply intermediate rotary shaft (4) activity to pass on mounting plate (9);

One end of mounting plate (9) is hinged on the framework (1) rotationally, at least be provided with two kidney slot holes (92) towards unanimity on the mounting plate (9), also being provided with two on the mounting plate (9) at least is the identical arc-shaped slot (93) of the center of circle and the radius of gyration with the articulating point of mounting plate (9) and framework (1) all;

Kidney slot hole (92) back that screw (17) passes on second clamping plate (8), clamp sleeve (10), the mounting plate (9) successively is threaded with first clamping plate (7), and described screw (17) and kidney slot hole (9) match also can relative kidney slot hole (9) slippage;

Arc-shaped slot (93) back that screw (18) passes on the mounting plate (9) is threaded with framework (1), described screw (18) and arc-shaped slot (93) match also can relative arc-shaped slot (93) the slippage of radian direction.

2, the belt tightness adjustment mechanism of two-stage band according to claim 1 transmission is characterized in that the articulating point of described mounting plate (9) and framework (1) closes on output revolving shaft (12).

3, the belt tightness adjustment mechanism of two-stage band according to claim 2 transmission, an end that it is characterized in that described mounting plate (9) is provided with a circular hole (94), have a screw (19) activity to pass circular hole (94) back and framework (1) is threaded, described mounting plate (9) screw (19) relatively rotates.

4, the belt tightness adjustment mechanism of two-stage band according to claim 3 transmission, it is characterized in that having a stepped part (191) on the described screw (19), this stepped part (191) is positioned at the circular hole (94) of mounting plate (9), and described mounting plate (9) can described relatively stepped part (191) rotation.

5, the belt tightness adjustment mechanism of two-stage band according to claim 1 transmission is characterized in that described kidney slot hole (92) has two.

6, the belt tightness adjustment mechanism of two-stage band according to claim 1 transmission is characterized in that described arc-shaped slot (93) has two, and it lays respectively at the both sides of kidney slot hole (93).

7, the belt tightness adjustment mechanism of two-stage band according to claim 1 transmission, it is characterized in that: on intermediate rotary shaft (4) side face that is positioned between mounting plate (9) and second clamping plate (8), have and to form middle steamboat (6) for the locating tooth of second belt (14) location so that have intermediate rotary shaft (4) part of locating tooth.

8, a kind of equipment that is provided with the belt tightness adjustment mechanism of two-stage band as claimed in claim 1 transmission, include motor (20), saw blade (21), the rotating shaft (11) that it is characterized in that described motor (20) links to each other with first drive wheel (2), first drive wheel (2) can be with rotating shaft (11) rotation of motor (20), described saw blade (21) links to each other with the output revolving shaft that is arranged in framework (1) (12), and saw blade (21) can rotate with output revolving shaft (12).

9, equipment according to claim 8 is characterized in that described equipment can be mitre saw, bench saw or the compound saw that overturns.