JP2011241902A - Tension adjusting device of belt driving device, belt driving device, and high-pressure cleaning vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tension adjusting device of a belt driving device capable of easily changing a belt, the belt driving device, and a high-pressure cleaning vehicle.SOLUTION: The tension adjusting device 20 of the belt driving device 9 includes a driving side pulley 10 attached to a driving shaft 10a, a driven side pulley 11 provided to a driven shaft 11a, a belt 12 stretched between the driving side pulley 10 and the driven side pulley 11, and a tightening pulley 21 whose rotary shaft 21a is rotatably supported at inside the belt 12 and which gives tension to the belt 12 by pressing the belt 12 from the inside toward the outside thereof. The tension adjusting device 20 of the belt driving device 9 includes a pair of hooks 23 that sandwich the belt 12 and are mounted on the both sides of a rotary shaft 21a of the tightening pulley 21, and a tension adjusting unit 24 for adjusting the tension of the belt 12 by moving the pair of hooks 23 to the inside or outside of the belt 12.

Description

  The present invention relates to a tension adjusting device, a belt driving device, and a high-pressure washing vehicle for a belt driving device that transmits a rotational motion of a driving shaft to a driven shaft by a belt.

  Conventionally, for example, as described in Patent Document 1, a tank for storing water in a cargo compartment of a vehicle, a pump capable of sucking water in the tank, and an internal combustion engine for driving a pump different from the engine for driving the vehicle (Engine) is installed, a cleaning gun is connected to the downstream side of the pressure feed pipe connected to the discharge side of the pump, and high-pressure cleaning water pressurized by the pump is sprayed from the cleaning gun toward the object to be cleaned. A device for cleaning an object to be cleaned is known.

  By the way, in the case where an independent engine is provided separately from the vehicle running engine as described above, in general, the pump includes a pulley provided on the driving shaft of the independent engine, a pulley provided on the driven shaft of the pump, These belts are constituted by belts that are hung on these pulleys, and a tightening pulley that rotatably supports a rotating shaft inside the belt and applies tension to the belt by pressing the belt from the inside to the outside of the belt. Driven by a belt drive.

Japanese Patent No. 4372742

  Further, since the belt of this type of belt driving device is wide, the tightening pulley is supported in a state where both sides of the rotating shaft are pulled outside the belt with the belt interposed therebetween. Therefore, unless the rotating shaft of the tightening pulley is removed and disassembled, the belt cannot be removed, and there is a problem that it takes much time to replace the belt.

  Accordingly, an object of the present invention is to provide a tension adjusting device for a belt driving device, a belt driving device, and a high-pressure washing vehicle capable of easily performing belt replacement work.

  The tension adjusting device of the present invention includes a driving pulley provided on a driving shaft, a driving pulley provided on a driving shaft, a belt hung on the driving pulley and the driving pulley, and a rotating shaft on the inner side of the belt. Is a tension adjusting device of a belt driving device having a tensioning pulley that tensions the belt by pressing the belt from the inside to the outside of the belt, and the tensioning pulley sandwiching the belt A pair of hooks that are hung on both sides of the rotating shaft, and a tension adjusting unit that can adjust the tension applied to the belt by advancing and retracting the pair of hooks inward and outward of the belt.

  According to the tension adjusting device of the present invention, when the pair of hooks are advanced to the inside of the belt by the tension adjusting unit and the pair of hooks hung on both sides of the rotating shaft of the tightening pulley are opened, Therefore, the belt can be easily removed and removed from the driving pulley, the driven pulley, and the tightening pulley.

  Moreover, it is desirable that the tension adjusting device of the present invention has a support arm that is rotatably supported around the driving shaft and supports the rotating shaft of the tightening pulley. As a result, when the pair of hooks are advanced to the inside of the belt by the tension adjusting unit as described above and the pair of hooks hung on both sides of the rotating shaft of the tightening pulley are released, the tightening pulley is moved to the driving shaft. It rotates while being supported around. Therefore, it is not necessary to hold the tightening pulley by hand when replacing the belt, and the belt replacement operation can be easily performed.

  Here, the tension adjusting unit includes a coupling unit that integrally couples the pair of hooks, a bolt that extends from the coupling unit toward the outside of the belt, and a bolt fixing that can adjust the fixing position in the length direction of the bolt. It is desirable to have a part. As a result, when the bolt extending from the connecting portion toward the outside of the belt is moved, the pair of hooks advance and retract simultaneously, so that the release of the pair of hooks and the adjustment of the tension applied to the belt can be easily performed. It becomes possible.

  In particular, the bolt is preferably fixed by a nut that is screwed to the bolt fixing portion via a spherical washer. As a result, the angle of the seating surface of the spherical washer changes corresponding to the inclination of the bolt, so that the nut can always be tightened straight with respect to the bolt.

  The belt driving device of the present invention includes a driving pulley provided on a driving shaft, a driven pulley provided on a driven shaft, a belt hung on the driving pulley and the driven pulley, and a rotating shaft on the inner side of the belt. Is rotatably supported, and includes a tightening pulley that applies tension to the belt by pressing the belt from the inside to the outside of the belt, and the tension adjusting device. According to the present invention, as described above, a belt drive device is obtained in which the belt can be easily replaced by being removed from the driving pulley, the driven pulley, and the tightening pulley.

  The high-pressure washing vehicle of the present invention includes an independent engine that is connected to a driving shaft different from a vehicle running engine, a high-pressure pump that is connected to a driven shaft, and water that stores high-pressure water by the high-pressure pump. A tank, a hose reel around which a hose for ejecting high-pressure water is wound, and the belt driving device are provided. According to the present invention, as described above, a high-pressure washing vehicle is obtained in which the belt of the belt driving device can be easily removed by being removed from the driving pulley, the driven pulley, and the tightening pulley.

(1) A pair of hooks that are hung on both sides of the rotating shaft of the tightening pulley across the belt, and a tension adjusting unit that can adjust the tension applied to the belt by moving the pair of hooks inward and outward of the belt. By having it, a pair of hooks hung on both sides of the rotating shaft of the tightening pulley can be opened, and the belt can be easily removed by being removed from the driving pulley, the driven pulley, and the tightening pulley.

(2) By having a support arm that is rotatably supported around the driving shaft and supports the rotating shaft of the tightening pulley, the tightening pulley rotates while being supported around the driving shaft. At this time, it is not necessary to hold the tightening pulley by hand, and the belt can be easily replaced.

(3) A tension adjusting unit integrally connecting the pair of hooks, a bolt extending from the connecting unit toward the outside of the belt, and a bolt fixing capable of adjusting a fixing position in the length direction of the bolt. By moving the bolt that extends from the connecting portion toward the outside of the belt, it is possible to easily release the pair of hooks and adjust the tension applied to the belt. Become.

(4) By fixing the bolt with a nut that is screwed to the bolt fixing part via a spherical washer, it is possible to always tighten the nut straight to the bolt regardless of the inclination of the bolt. It can be firmly fixed to the bolt fixing part.

It is a side view of the high-pressure washing truck in an embodiment of the invention. It is an AA arrow line view of FIG. It is a BB arrow line view of FIG. It is a BB arrow line view of Drawing 2 at the time of belt exchange. It is a perspective view of a belt drive device.

  FIG. 1 is a side view of a high-pressure washing vehicle according to an embodiment of the present invention, and FIG. 2 is a view taken along the line AA in FIG. As shown in FIGS. 1 and 2, a high-pressure washing vehicle 1 according to an embodiment of the present invention includes a water tank 4 in which water is stored in a cargo compartment 3 disposed on a chassis 2, and a water tank 4. A high-pressure pump 5 for pumping water of water, an engine 6 for driving the high-pressure pump 5, and a hose reel 7 around which a hose (not shown) for jetting water made into high-pressure water by the high-pressure pump 5 is wound The high-pressure pump 5, the engine 6, the hose reel 7, and the like are accommodated. An opening / closing door 3 a is provided behind the luggage compartment 3.

  In addition, the high pressure washing vehicle 1 includes a belt driving device 9 for driving the high pressure pump 5 by the engine 6 in the cargo compartment 3. As shown in FIGS. 3 to 5, the belt driving device 9 includes a driving pulley 10 provided on the driving shaft 10 a, a driven pulley 11 provided on the driven shaft 11 a, a driving pulley 10 and a driven pulley. 11, a belt 12 that transmits the rotation of the driving pulley 10 to the driven pulley 11, and a tension adjusting device 20 for adjusting the tension of the belt.

  The engine 6 is an independent engine different from the vehicle driving engine, and is connected to the driving shaft 10 a of the driving pulley 10. The high-pressure pump 5 is connected to the driven shaft 11 a of the driven pulley 11. A hydraulic pump 13 used for automatic winding of the hose reel 7 is also connected to the driving shaft 10a. In addition, hydraulic hoses 13 a and 13 b as hydraulic piping of the hydraulic pump 13 are passed through the belt 12.

  The tension adjusting device 20 includes a tightening pulley 21, a support arm 22 that supports both ends of the rotating shaft 21 a of the tightening pulley 21, and a pair that is hung on both sides of the rotating shaft 21 a of the tightening pulley 21 with the belt 12 interposed therebetween. And a tension adjusting section 24 for advancing and retracting the pair of hooks 23 inward and outward of the belt 12.

  The tightening pulley 21 has a rotating shaft 21a rotatably supported inside the belt 12, and applies tension to the belt 12 by pressing the belt 12 from the inside to the outside of the belt 12. The support arm 22 is rotatably supported around the driving shaft 10a.

  The hook 23 is substantially C-shaped, is inserted into a gap between the tightening pulley 21 and the support arms 22 on both sides, and is hooked on the rotating shaft 21a of the tightening pulley 21 from the substantially C-shaped opening. . The pair of hooks 23 are integrally connected by a connecting portion 25. Bolts 26 extend from the connecting portion 25 toward the outside of the belt 12. The tension adjusting section 24 is screwed onto the connecting section 25 and the bolt 26, a bolt fixing section 27 capable of adjusting the fixing position in the length direction of the bolt 26 by inserting the bolt 26, and the bolt 26. The nuts 28a and 28b are joined together and spherical washers 29a and 29b. The spherical washers 29a and 29b are those in which the seating surfaces facing each other are convex and concave spherical surfaces.

  When the belt driving device 9 having the above-described configuration is used, the nut 12a is screwed into the bolt 26 of the tension adjusting device 20 via the spherical washers 29a and 29b, and the pair of hooks 23 are pulled to the outside of the belt 12. Is pressed by the tightening pulley 21 from the inside to the outside to adjust the tension of the belt 12. At this time, the angle of the seating surface on the nut 28 a side of the spherical washer 29 b changes corresponding to the inclination of the bolt 26, so that the nut 28 a is tightened straight with respect to the bolt 26. Further, the nut 28b is screwed into the bolt 26 to securely fix the position of the bolt 26 in the length direction. This prevents the belt 12 from slipping, transmits the rotation of the driving pulley 10 connected to the engine 6 to the driven pulley 11 connected to the high pressure pump 5, and drives the high pressure pump 5 by the engine 6. Can do.

  When the belt 12 is replaced, if the nuts 28a and 28b are loosened, the pair of hooks 23 and the tightening pulley 21 move to the inside of the belt 12 and the belt 12 is loosened. When the pair of hooks 23 are removed from both sides of the rotating shaft 21a of the tightening pulley 21 and opened, the tightening pulley 21 is further rotated inside the belt 12 as shown in FIG. It becomes possible. After the belt 12 is replaced, the tension of the belt 12 can be adjusted by pulling the rotating shaft 21a of the tightening pulley 21 to the outside of the belt 12 by the pair of hooks 23 in the reverse procedure.

  Thus, according to the tension adjusting device 20 in the present embodiment, the pair of hooks 23 hung on both sides of the rotating shaft 21a of the tightening pulley 21 are opened, and the belt 12 is moved to the driving pulley 10 and the driven pulley. 11 and the tightening pulley 21 and can be easily replaced. Further, when the belt is exchanged, the tightening pulley 21 rotates while being supported around the driving shaft 10a by the support arm 22, so that it is not necessary to hold the tightening pulley 21 by hand, and the belt 12 can be easily exchanged. Can be done. Further, in the high pressure washing vehicle 1 according to the present embodiment, the hydraulic hoses 13a and 13b are passed through the inside of the belt 12. Therefore, the belt 12 can be replaced without disassembling the hydraulic hoses 13a and 13b. Is possible.

  Further, in the tension adjusting device 20, the pair of hooks 23 are integrally connected by the connecting portion 25, and when the bolt 26 is moved, the pair of hooks 23 advance and retreat at the same time. It is possible to easily adjust the tension applied to the belt 12.

  In addition to the high-pressure washing vehicle 1, the tension adjusting device 20 in the present embodiment can be widely applied to a belt driving device that transmits the rotational motion of the driving shaft to the driven shaft by a belt.

  The tension adjusting device of the present invention is useful as a tension adjusting device for a belt driving device that transmits the rotational motion of a driving shaft to a driven shaft by a belt, and in particular, a tension adjusting device capable of easily performing belt replacement work. It is suitable as.

DESCRIPTION OF SYMBOLS 1 High pressure washing vehicle 2 Car chassis 3 Cargo compartment 3a Open / close door 4 Water tank 5 High pressure pump 6 Engine 7 Hose reel 8 Operation panel 9 Belt drive 10 Drive side pulley 10a Drive shaft 11 Drive side pulley 11a Drive shaft 12 Belt 13 Hydraulic pump 13a , 13b Hydraulic hose 20 Tension adjusting device 21 Tightening pulley 22 Support arm 23 Hook 24 Tension adjusting part 25 Connection part 26 Bolt 27 Bolt fixing part 28a, 28b Nut 29a, 29b Spherical washer

Claims (6)

A driving pulley provided on the driving shaft;
A driven pulley provided on the driven shaft;
A belt hung on the driving pulley and the driven pulley;
A tension adjusting device for a belt driving device, wherein a rotation shaft is rotatably supported inside the belt, and a tightening pulley that applies tension to the belt by pressing the belt from the inside to the outside of the belt. There,
A pair of hooks that are hung on both sides of the rotating shaft of the tightening pulley across the belt;
A tension adjusting device comprising: a tension adjusting unit capable of adjusting a tension applied to the belt by advancing and retracting the pair of hooks in and out of the belt.   The tension adjusting device according to claim 1, further comprising a support arm that is rotatably supported around the driving shaft and supports a rotating shaft of the tightening pulley. The tension adjusting unit is
A connecting portion for integrally connecting the pair of hooks;
A bolt extending from the connecting portion toward the outside of the belt;
The tension adjusting device according to claim 1, further comprising: a bolt fixing portion capable of adjusting a fixing position in a length direction of the bolt.   The tension adjusting device according to claim 3, wherein the bolt is fixed by a nut screwed to the bolt fixing portion via a spherical washer. A driving pulley provided on the driving shaft;
A driven pulley provided on the driven shaft;
A belt hung on the driving pulley and the driven pulley;
A tightening pulley that rotatably supports a rotating shaft inside the belt and applies tension to the belt by pressing the belt from the inside to the outside of the belt;
A belt driving device comprising the tension adjusting device according to claim 1. An independent engine coupled to the driving shaft different from the vehicle driving engine;
A high-pressure pump coupled to the driven shaft;
A water tank for storing water that is high-pressure water by the high-pressure pump;
A hose reel around which a hose for ejecting the high-pressure water is wound;
A high-pressure washing vehicle having the belt drive device according to any one of claims 1 to 5.

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