Water rescue equipment

Abstract

The utility model provides water rescue equipment, and belongs to the technical field of rescue equipment. The water rescue equipment comprises a bottom plate, a fixing frame, a winding drum, a rescue rope, a life buoy, an adjusting mechanism, an adjusting table, a motor, a first connecting disc, a connecting pin, a second connecting disc, a connecting hole and a guide hole. The connecting pin can be moved out of the connecting hole, so that the situation that when the rescue rope is pulled to unwind the rescue rope from the winding drum, the winding drum is locked by the motor, and consequently the winding drum cannot rotate is avoided, and the use experience of the product is improved; meanwhile, the connecting pin can be embedded into the connecting hole, so that the motor can drive the winding drum to rotate, and power is provided for rotating the winding drum.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of rescue equipment, and particularly relates to a water rescue equipment. BACKGROUND

[0002] In the related art, when a person is trapped on water or falls into water, a rescuer throws a life buoy connected with a rescue rope to the fallen person so that the fallen person can grab the life buoy, and then the rescuer pulls the rescue rope to pull the fallen person to a safe position.

[0003] The prior art (authorized publication number: CN219927946U) discloses a water rescue sling device, which comprises a support plate, a support frame, a first rotating shaft, a wire reel, a hand wheel and a motor. In the process of rescue, when the weather is fine and the device functions normally, the motor is started to drive the first rotating shaft to rotate, which in turn drives the wire reel to rotate, thereby completing the winding and unwinding operation. The device automatically brings the person in distress to a safe area, saving manpower. When it rains or is affected by moisture, manually rotating the hand wheel can drive the first rotating shaft to rotate, which in turn drives the wire reel to rotate, thereby completing the winding and unwinding operation. This device can avoid the leakage phenomenon in rainy weather, thereby ensuring the safety of the user, and can ensure the smooth progress of the rescue work when the device is affected by moisture, thereby being suitable for use in water environments.

[0004] In the prior art, since the motor is connected with the wire reel through the first pulley, the second pulley and the belt, when the rope is pulled to be unwound from the wire reel, the motor will lock the wire reel, so that the rope cannot be unwound from the wire reel, thereby affecting the user experience of the product. UTILITY MODEL CONTENTS

[0005] To solve the problem of the prior art that the motor is connected with the wire reel through the first pulley, the second pulley and the belt, so that when the rope is pulled to be unwound from the wire reel, the motor will lock the wire reel, so that the rope cannot be unwound from the wire reel, thereby affecting the user experience of the product, the utility model provides a water rescue equipment, which can move the connecting pin out of the connecting hole to avoid the situation that when the rescue rope is pulled to be unwound from the reel, the motor locks the reel, so that the reel cannot rotate, thereby improving the user experience of the product. At the same time, the connecting pin can be embedded in the connecting hole to ensure that the motor can drive the reel to rotate, thereby providing power for the rotating reel. The specific technical scheme is as follows:

[0006] The utility model provides an overwater rescue equipment, overwater rescue equipment includes: bottom plate, mount, reel, rescue rope, life buoy, adjusting mechanism, adjusting platform, motor, first connecting disc, connecting pin, second connecting disc, connecting hole and guide hole, two mounts are installed on the bottom plate, and there is spacing between the two mounts, the reel is located between the two mounts, and both ends of the reel are rotatably connected with the two mounts, one end of the rescue rope is connected with the reel, and the rescue rope is wound on the outside of the reel, the life buoy is connected with the other end of the rescue rope, the adjusting mechanism is installed on the bottom plate, and the adjusting mechanism is located on the side of one mount, the adjusting platform is connected with the adjusting mechanism, the motor is provided with the output shaft, and the motor is installed on the adjusting platform, the first connecting disc is connected with the output shaft of the motor, at least two connecting pins are connected with the first connecting disc, the second connecting disc is connected with one end of the reel, the second connecting disc is located on the outside of the mount, and the second connecting disc is opposite to the first connecting disc, at least two connecting holes are arranged in the second connecting disc, and at least two connecting holes are opposite to at least two connecting pins respectively, the cross section of the guide hole is trapezoidal, at least two guide holes are arranged in the second connecting disc, and the guide hole is in communication with the connecting hole.

[0007] In addition, the overwater rescue equipment in the above technical solution provided by the utility model can also have the following additional technical features:

[0008] In the above technical solution, the adjusting mechanism comprises: a first support plate, a threaded hole and a ball screw, two first support plates are installed on the bottom plate, and there is spacing between the two first support plates, an internal thread is arranged in the threaded hole, the threaded hole is arranged in the adjusting platform, an external thread is arranged on the outer wall of the ball screw, both ends of the ball screw are rotatably connected with the two first support plates, and the ball screw passes through the threaded hole, wherein the internal thread is matched with the external thread.

[0009] In the above technical solution, the adjusting mechanism further comprises: a first light lever and a hand wheel, both ends of the first light lever are connected with the two first support plates, and the first light lever passes through the adjusting platform, and the hand wheel is sleeved on the outside of the ball screw.

[0010] In the above technical solution, the overwater rescue equipment comprises: a second support plate, a reciprocating screw, a moving platform and a guide roller, two second support plates are installed on the bottom plate, and there is spacing between the two second support plates, both ends of the reciprocating screw are rotatably connected with the two second support plates, the moving platform is sleeved on the outside of the reciprocating screw, and two guide rollers are rotatably connected with the top of the moving platform and connected with the two sides of the rescue rope.

[0011] In the above technical solution, the overwater rescue equipment comprises: a second light lever, both ends of the second light lever are connected with the two second support plates, and the second light lever passes through the moving platform.

[0012] In the technical scheme, the water rescue equipment comprises a first pulley, a second pulley and a belt, the first pulley is connected with the reciprocating lead screw, the second pulley is connected with the other end of the winding drum and is located outside the fixed frame, and the belt is sleeved outside the first pulley and the second pulley.

[0013] Compared with the prior art, the water rescue equipment has the beneficial effects that:

[0014] 1. The rescue rope is connected with the life buoy, and the rescue rope is wound outside the winding drum, so that when the person falling into water grabs the life buoy, the winding drum is rotated, the rescue rope is wound outside the winding drum, the life buoy and the person falling into water are pulled to move, and the rescue of the person falling into water is completed. The adjusting mechanism is connected with the adjusting table, the motor is installed on the adjusting table, the adjusting mechanism can drive the adjusting table and the motor to move, the distance between the motor and the fixed frame is adjusted, the first connecting disc is connected with the output shaft of the motor, the plurality of connecting pins are connected with the first connecting disc, the connecting pins are opposite to the connecting holes on the second connecting disc, when the adjusting mechanism drives the adjusting table and the motor to move towards the fixed frame, the connecting pins can be embedded in the connecting holes, when the motor drives the first connecting disc and the connecting pins to rotate, the connecting pins can drive the second connecting disc and the winding drum to rotate, and power is provided for the rotating winding drum. The connecting pins can be moved out of the connecting holes to avoid the situation that the winding drum cannot rotate when the rescue rope is pulled to be unwound from the winding drum because the motor locks the winding drum, thereby improving the use experience of the product. The connecting pins can be embedded in the connecting holes to ensure that the motor can drive the winding drum to rotate, thereby providing power for the rotating winding drum.

[0015] 2. The threaded hole is arranged through the adjusting table, and the ball screw passes through the threaded hole, so that the ball screw is threadedly connected with the adjusting table, the ball screw is rotated, the ball screw drives the adjusting table to move, and the position of the adjusting table is adjusted.

[0016] 3. The two ends of the first light lever are connected with the two first supporting plates respectively, and the first light lever passes through the adjusting table, so that the two first supporting plates cooperate to support the first light lever, the adjusting table can move along the first light lever, the adjusting table is prevented from deviating during movement, and the stability of the movement of the adjusting table is improved.

[0017] 4. The two guide rollers are connected with the top of the moving table by rotating connection, and the two guide rollers are connected with the two sides of the rescue rope, so that the reciprocating screw rod can move the moving table and the two guide rollers reciprocally, so that the two guide rollers can clamp the rescue rope, and ensure that the two guide rollers can reciprocate with the rescue rope, thereby avoiding the rescue rope from being knotted during winding, and improving the winding effect of the rescue rope.

[0018] 5. The two ends of the second light rod are connected with the two second supporting plates respectively, and the second light rod passes through the moving table, so that the two second supporting plates cooperate to support the second light rod, so that the moving table can move along the second light rod, so as to avoid the moving table from deviating during movement, thereby improving the stability of the moving table.

[0019] 6. The first pulley is connected with the reciprocating screw rod, the second pulley is connected with the other end of the winding drum, and the belt is sleeved on the outer sides of the first pulley and the second pulley, so that when the winding drum rotates, the winding drum drives the reciprocating screw rod to rotate through the first pulley, the second pulley and the belt, so that the reciprocating screw rod and the winding drum rotate at a frequency suitable for each other, thereby improving the guiding effect of the two guide rollers on the rescue rope. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a top view of a water rescue equipment of the utility model;

[0021] Figure 2 It is Figure 1 A partial enlarged view of the place;

[0022] Figure 3 It is Figure 1 B partial enlarged view of the place;

[0023] Among them, Figures 1 to 3 The correspondence between the reference signs and the component names in the figure is as follows:

[0024] 10 bottom plate, 11 fixed frame, 12 winding drum, 13 rescue rope, 14 life buoy, 15 adjusting mechanism, 151 first supporting plate, 152 ball screw, 153 first light rod, 154 hand wheel, 16 adjusting table, 17 motor, 18 first connecting disc, 19 connecting pin, 20 second connecting disc, 21 connecting hole, 22 guide hole, 23 second supporting plate, 24 reciprocating screw rod, 25 moving table, 26 guide roller, 27 second light rod, 28 first pulley, 29 second pulley, 30 belt. DETAILED DESCRIPTION

[0025] The utility model is further described below in combination with specific implementation examples and drawings. Figures 1 to 3 The utility model is further described below in combination with specific implementation examples and drawings.

[0026] A water rescue device, such as Figures 1 to 3 As shown, the water rescue device comprises a bottom plate 10, a fixing frame 11, a winding drum 12, a rescue rope 13, a life buoy 14, an adjusting mechanism 15, an adjusting platform 16, a motor 17, a first connecting disc 18, a connecting pin 19, a second connecting disc 20, a connecting hole 21 and a guide hole 22; two fixing frames 11 are installed on the bottom plate 10, and the two fixing frames 11 are spaced apart; the winding drum 12 is located between the two fixing frames 11, and both ends of the winding drum 12 are rotatably connected with the two fixing frames 11; one end of the rescue rope 13 is connected with the winding drum 12, and the rescue rope 13 is wound on the outside of the winding drum 12; the life buoy 14 is connected with the other end of the rescue rope 13; the adjusting mechanism 15 is installed on the bottom plate 10, and the adjusting mechanism 15 is located on one side of one fixing frame 11; the adjusting platform 16 is connected with the adjusting mechanism 15; the motor 17 is provided with an output shaft, and the motor 17 is installed on the adjusting platform 16; the first connecting disc 18 is connected with the output shaft of the motor 17; at least two connecting pins 19 are connected with the first connecting disc 18; the second connecting disc 20 is connected with one end of the winding drum 12, the second connecting disc 20 is located on the outside of the fixing frame 11, and the second connecting disc 20 is opposite to the first connecting disc 18; at least two connecting holes 21 are arranged in the second connecting disc 20, and the at least two connecting holes 21 are respectively opposite to the at least two connecting pins 19; the cross section of the guide hole 22 is trapezoidal, at least two guide holes 22 are arranged in the second connecting disc 20, and the guide hole 22 is in communication with the connecting hole 21.

[0027] The two fixed frames 11 are installed on the bottom plate 10, and the two ends of the winding drum 12 are rotatably connected with the two fixed frames 11, so that the two fixed frames 11 cooperate to support the winding drum 12, and the winding drum 12 can rotate between the two fixed frames 11; one end of the rescue rope 13 is connected with the winding drum 12, the rescue rope 13 is arranged outside the winding drum 12, and the life buoy 14 is connected with the other end of the rescue rope 13, so that the life buoy 14 moves synchronously with the rescue rope 13, and the winding drum 12 is rotated to wind the rescue rope 13 outside the winding drum 12, and then the life buoy 14 is moved. The adjusting mechanism 15 is installed on the bottom plate 10, and the adjusting table 16 is connected with the adjusting mechanism 15, so that the bottom plate 10 supports the adjusting mechanism 15, and the adjusting mechanism 15 can drive the adjusting table 16 to move, and then the distance between the adjusting table 16 and the winding drum 12 is adjusted; the motor 17 is installed on the adjusting table 16, the first connecting disc 18 is connected with the output shaft of the motor 17, and a plurality of connecting pins 19 are connected with the first connecting disc 18, so that the adjusting table 16 moves synchronously with the motor 17, and the motor 17 can drive the first connecting disc 18 and the plurality of connecting pins 19 to rotate. The second connecting disc 20 is connected with one end of the winding drum 12, a plurality of connecting holes 21 are arranged in the second connecting disc 20, and the connecting holes 21 are opposite to the connecting pins 19, so that the second connecting disc 20 rotates synchronously with the winding drum 12, so that the connecting pins 19 can be embedded in the connecting holes 21, and then when the motor 17 drives the first connecting disc 18 and the plurality of connecting pins 19 to rotate, the connecting pins 19 can drive the second connecting disc 20 and the winding drum 12 to rotate; the guide hole 22 with a trapezoidal cross section is arranged in the second connecting disc 20, and the guide hole 22 is communicated with the connecting hole 21, so that the connecting pin 19 can be embedded in the connecting hole 21 through the guide hole 22, thereby reducing the difficulty of embedding the connecting pin 19 in the connecting hole 21.

[0028] When the product is used, if a person falls into water and needs to be rescued, the rescue rope 13 is pulled to unwind the rescue rope 13 from the winding drum 12; then the life buoy 14 is thrown to the falling person, so that the falling person can easily grab the life buoy 14; after the falling person grabs the life buoy 14, the adjusting mechanism 15 is started to drive the adjusting table 16 and the motor 17 to move towards the fixed frame 11, so that the connecting pin 19 is embedded in the connecting hole 21 through the guide hole 22; then the motor 17 is started to drive the first connecting disc 18 and the plurality of connecting pins 19 to rotate, so that the plurality of connecting pins 19 drive the second connecting disc 20 and the winding drum 12 to rotate, and then the rescue rope 13 is wound outside the winding drum 12 to pull the life buoy 14 and the falling person to move, so as to complete the rescue of the falling person.

[0029] The rescue rope 13 is connected with the life buoy 14, and the rescue rope 13 is wound outside the winding drum 12, so that when a person falling into water grabs the life buoy 14, the winding drum 12 is rotated, the rescue rope 13 is wound outside the winding drum 12, the life buoy 14 and the person falling into water are pulled, and the rescue of the person falling into water is completed. The adjusting mechanism 15 is connected with the adjusting table 16, the motor 17 is installed on the adjusting table 16, the adjusting mechanism 15 can drive the adjusting table 16 and the motor 17 to move, the distance between the motor 17 and the fixed frame 11 is adjusted, the first connecting disc 18 is connected with the output shaft of the motor 17, the plurality of connecting pins 19 are connected with the first connecting disc 18, the connecting pin 19 is opposite to the connecting hole 21 on the second connecting disc 20, when the adjusting mechanism 15 drives the adjusting table 16 and the motor 17 to move towards the fixed frame 11, the connecting pin 19 can be embedded in the connecting hole 21, when the motor 17 drives the first connecting disc 18 and the connecting pin 19 to rotate, the connecting pin 19 can drive the second connecting disc 20 and the winding drum 12 to rotate, and power is provided for the rotation of the winding drum 12. Not only can the connecting pin 19 be moved out of the connecting hole 21 to avoid the situation that the winding drum 12 cannot rotate when the rescue rope 13 is pulled to unwind the rescue rope 13 from the winding drum 12, the motor 17 locks the winding drum 12, and the use experience of the product is improved, but also the connecting pin 19 can be embedded in the connecting hole 21 to ensure that the motor 17 can drive the winding drum 12 to rotate, thereby providing power for the rotation of the winding drum 12.

[0030] In the embodiment of the utility model, as shown in Figures 1 to 3 The adjusting mechanism 15 comprises: a first support plate 151, a threaded hole and a ball screw 152; two first support plates 151 are installed on the bottom plate 10, and there is a spacing between the two first support plates 151; the threaded hole is provided with an internal thread, and the threaded hole is penetratingly arranged in the adjusting table 16; the outer wall of the ball screw 152 is provided with an external thread, and the two ends of the ball screw 152 are rotationally connected with the two first support plates 151 respectively, and the ball screw 152 passes through the threaded hole; wherein the internal thread is matched with the external thread.

[0031] The two first support plates 151 are installed on the bottom plate 10, and the two ends of the ball screw 152 are rotationally connected with the two first support plates 151 respectively, so that the two first support plates 151 cooperate to support the ball screw 152, so that the ball screw 152 can rotate between the two first support plates 151; the threaded hole is penetratingly arranged in the adjusting table 16, and the ball screw 152 passes through the threaded hole, so that the ball screw 152 is threadedly connected with the adjusting table 16, so that the ball screw 152 is rotated to drive the adjusting table 16 to move, and then the position of the adjusting table 16 is adjusted.

[0032] In the embodiment of the utility model, as shown in Figures 1 to 3 The adjusting mechanism 15 further comprises a first light lever 153 and a hand wheel 154; the two ends of the first light lever 153 are connected with the two first support plates 151 respectively, and the first light lever 153 passes through the adjusting table 16; the hand wheel 154 is sleeved on the outside of the ball screw 152.

[0033] The two ends of the first light lever 153 are connected with the two first support plates 151 respectively, and the first light lever 153 passes through the adjusting table 16, so that the two first support plates 151 cooperate to support the first light lever 153, thereby realizing that the adjusting table 16 can move along the first light lever 153, avoiding deviation of the adjusting table 16 during movement, and improving the stability of the movement of the adjusting table 16. The hand wheel 154 is sleeved on the outside of the ball screw 152, so that the hand wheel 154 is rotated to drive the ball screw 152 to rotate, thereby reducing the difficulty of rotating the ball screw 152 and improving the use experience of the product.

[0034] In the embodiment of the utility model, as shown in Figures 1 to 3 The water rescue equipment comprises a second support plate 23, a reciprocating screw 24, a moving table 25 and a guide roller 26; the two second support plates 23 are installed on the bottom plate 10 and have a spacing between them; the two ends of the reciprocating screw 24 are rotatably connected with the two second support plates 23 respectively; the moving table 25 is sleeved on the outside of the reciprocating screw 24; the two guide rollers 26 are rotatably connected with the top of the moving table 25, and the two guide rollers 26 are connected with the two sides of the rescue rope 13.

[0035] The two second support plates 23 are installed on the bottom plate 10, and the two ends of the reciprocating screw 24 are rotatably connected with the two second support plates 23 respectively, so that the two second support plates 23 cooperate to support the reciprocating screw 24, thereby realizing that the reciprocating screw 24 can rotate between the two second support plates 23; the moving table 25 is sleeved on the outside of the reciprocating screw 24, the two guide rollers 26 are rotatably connected with the top of the moving table 25, and the two guide rollers 26 are connected with the two sides of the rescue rope 13, so that the reciprocating screw 24 can move the moving table 25 and the two guide rollers 26 reciprocally, thereby realizing that the two guide rollers 26 clamp the rescue rope 13, and ensuring that the two guide rollers 26 can reciprocate with the rescue rope 13, thereby avoiding the rescue rope 13 from being knotted during winding, and improving the winding effect of the rescue rope 13.

[0036] In the embodiment of the utility model, as shown in Figures 1 to 3 The water rescue equipment comprises a second light lever 27; the two ends of the second light lever 27 are connected with the two second support plates 23 respectively, and the second light lever 27 passes through the moving table 25.

[0037] The two ends of the second light pole 27 are connected with the two second supporting plates 23 respectively, and the second light pole 27 passes through the moving table 25, so that the two second supporting plates 23 cooperate to support the second light pole 27, and the moving table 25 can move along the second light pole 27, so that the moving table 25 is prevented from deviating when moving, and the stability of the moving table 25 is improved.

[0038] In the embodiment of the utility model, as shown in Figures 1 to 3 The first belt pulley 28 is connected with the reciprocating lead screw 24, the second belt pulley 29 is connected with the other end of the winding drum 12, and the second belt pulley 29 is located outside the fixed frame 11, and the belt 30 is simultaneously sleeved outside the first belt pulley 28 and the second belt pulley 29.

[0039] The first belt pulley 28 is connected with the reciprocating lead screw 24, the second belt pulley 29 is connected with the other end of the winding drum 12, and the second belt pulley 29 is located outside the fixed frame 11, and the belt 30 is simultaneously sleeved outside the first belt pulley 28 and the second belt pulley 29.

[0040] Specifically, when the life buoy 14 is ready to be thrown out, the rescue rope 13 can be taken out from between the two guide rollers 26, so that the two guide rollers 26 do not affect the throwing distance of the life buoy 14.

[0041] In the description of the utility model, the term "a plurality of" refers to two or more than two, unless otherwise explicitly limited, the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, so it cannot be understood as a limitation on the utility model; the terms "connection", "installation", "fixation" and the like should be understood broadly, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0042] In the description of the utility model, the description of the terms "one embodiment", "some embodiments", "a specific embodiment" and the like means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are contained in at least one embodiment or example of the utility model. In the utility model, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0043] The above only is the preferred embodiment of the utility model has, and does not use for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be contained in the protection scope of the utility model.

Claims

1. A water rescue device, characterized in that, The water rescue device comprises: a bottom plate; two fixing frames installed on the bottom plate and spaced apart from each other; a winding drum located between the two fixing frames and rotatably connected to the two fixing frames at two ends thereof; a rescue rope having one end connected to the winding drum and wound around the outside of the winding drum; a life buoy connected to the other end of the rescue rope; an adjusting mechanism installed on the bottom plate and located on one side of one of the fixing frames; an adjusting platform connected to the adjusting mechanism; a motor provided with an output shaft and installed on the adjusting platform; a first connecting disc connected to the output shaft of the motor; at least two connecting pins connected to the first connecting disc; a second connecting disc connected to one end of the winding drum, located on the outside of the fixing frame, and opposite to the first connecting disc; at least two connecting holes provided in the second connecting disc and opposite to the at least two connecting pins, respectively; and at least two guide holes provided in the second connecting disc and in communication with the connecting holes.

2. A water rescue device according to claim 1, characterised in that The adjusting mechanism comprises: two first support plates installed on the bottom plate and spaced apart from each other; screw holes provided with internal threads and penetrating through the adjusting platform; a ball screw provided with external threads on the outer wall thereof, rotatably connected to the two first support plates at two ends thereof, and penetrating through the screw holes; wherein the internal threads are adapted to the external threads.

3. A water rescue device according to claim 2, characterised in that, The adjusting mechanism further comprises: a first light lever rotatably connected to the two first support plates at two ends thereof and penetrating through the adjusting platform; and a hand wheel sleeved on the outside of the ball screw.

4. A water rescue device according to claim 1, characterised in that The water rescue device comprises: two second support plates installed on the bottom plate and spaced apart from each other; a reciprocating screw rotatably connected to the two second support plates at two ends thereof; a moving platform sleeved on the outside of the reciprocating screw; two guide rollers rotatably connected to the top of the moving platform and connected to the two sides of the rescue rope.

5. A water rescue device according to claim 4, characterised in that, The water rescue device comprises: a second light lever rotatably connected to the two second support plates at two ends thereof and penetrating through the moving platform.

6. A water rescue device according to claim 5, characterised in that, The water rescue device comprises: a first belt pulley connected to the reciprocating screw; a second belt pulley connected to the other end of the winding drum and located on the outside of the fixing frame. A belt simultaneously sheathed on the outer sides of the first and second pulleys. A belt simultaneously sheathed on the outer sides of the first and second pulleys.

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