CN220948118U - High limestone material taking vehicle of stability - Google Patents

Abstract

The utility model discloses a high-stability limestone taking trolley, which relates to the technical field of limestone taking, and comprises a limestone taking box, wherein a first rectangular groove is formed in the transverse middle position of the front surface of the limestone taking box, a guide device is arranged in the first rectangular groove, rectangular holes are formed in the left side and the right side of the front end of the limestone taking box and correspond to the position of the first rectangular groove, a winding device is arranged in the rectangular holes, a pushing device is arranged at the top end of the rear surface of the limestone taking box, front wheels are symmetrically and rotatably arranged at the bottom ends of the front sides of the left surface and the right surface of the limestone taking box, a fixing block is fixedly arranged at the transverse middle position of the rear end of the lower surface of the limestone taking box, rubber strips are uniformly and fixedly arranged on the lower surface of the fixing block, the rubber strips on the lower surface of the fixing block have an anti-skid function, the fact that the taking trolley cannot move in a working state is guaranteed, and the stability of the device is improved.

Description

High limestone material taking vehicle of stability

Technical Field

The utility model relates to the technical field of limestone taking, in particular to a high-stability limestone taking vehicle.

Background

The main component of the limestone is calcium carbonate. Lime and limestone are a large number of raw materials used for building materials and industries, limestone can be directly processed into stones and burned into quicklime, the quicklime is absorbed with moisture or added with water to become slaked lime, and the slaked lime is prepared into lime slurry, lime paste and the like to be used as coating materials and tile adhesives, so that the demand for limestone is increasing, and a limestone taking vehicle is needed to take limestone when the limestone is taken.

The existing limestone taking trolley is used for carrying out limestone taking when external equipment is used for carrying limestone or manually loading the limestone onto the taking trolley, so that the practicability of the taking trolley is low, the working efficiency of taking is low, and the existing limestone taking trolley is used for taking, because the weight of the limestone is large, the phenomenon that the taking trolley moves when the limestone is loaded is easily caused, potential safety hazards exist and the taking efficiency is influenced.

Disclosure of utility model

(One) solving the technical problems

The utility model aims to at least solve one of the technical problems in the prior art, and provides a limestone taking trolley with high stability, which can solve the problems that the practicability of the taking trolley is low, the working efficiency of taking is slower, and the existing limestone taking trolley is easy to cause the phenomenon that the taking trolley moves when loading limestone due to the fact that the weight of limestone is large when taking the material, potential safety hazards exist and the taking efficiency is influenced.

(II) technical scheme

In order to achieve the above purpose, the present utility model provides the following technical solutions: the limestone taking trolley with high stability comprises a limestone taking box, wherein a first rectangular groove is formed in the transverse middle position of the front surface of the limestone taking box, and a guide device is arranged in the first rectangular groove;

wherein, the front end of the limestone material taking box is provided with a rectangular hole corresponding to the position of the first rectangular groove, and a winding device is arranged in the rectangular hole;

wherein, the top end of the rear surface of the limestone taking box is provided with a pushing device;

The front wheels are symmetrically and rotatably arranged at the bottom ends of the front sides of the left surface and the right surface of the limestone material taking box, second rectangular grooves are correspondingly formed in the bottom ends of the rear sides of the left surface and the right surface of the limestone material taking box, and lifting devices are arranged in the two second rectangular grooves;

Wherein, the lower surface of the limestone material taking box is provided with a driving device; the rear end of the lower surface of the limestone material taking box is fixedly provided with a fixed block at a transverse middle position, and the lower surface of the fixed block is uniformly and fixedly provided with rubber strips.

Preferably, the guiding device comprises a circular rod, the circular rod is fixedly arranged at the top end of the inner part of the first rectangular groove, the connecting plate is fixedly connected to the tangent position of the front side of the circular rod, the T-shaped grooves are respectively formed in the transverse middle position of the front side surface of the circular rod and the transverse middle position of the front surface of the connecting plate, the interiors of the two T-shaped grooves are communicated, and the rotating disc is rotatably arranged on the transverse middle position of the rear side surface of the circular rod.

Preferably, the winding device comprises two support plates, the two support plates are correspondingly and fixedly arranged on the inner lower surface of the rectangular hole, and winding wheels are rotatably arranged on the opposite surfaces of the two support plates;

Wherein, the inside lower surface of rectangular hole is close to the position fixed mounting of right side backup pad and has the motor support, and the upper surface fixed mounting of motor support has first motor, and the output shaft of first motor runs through the left surface of backup pad and rotates with the backup pad to be connected, and the output shaft of first motor and the right-hand member fixed connection of rolling wheel.

Preferably, the inside slidable mounting in T shape groove has first T shape slider, and the preceding fixedly connected with dustpan of first T shape slider is connected with wire rope on the upper surface intermediate position of first T shape slider, and wire rope is kept away from the surface of rolling dish and is extended to the surface of rolling wheel after the one end of first T shape slider is walked around to wire rope, and wire rope is kept away from the one end of first T shape slider and the surface fixedly connected with of rolling wheel.

Preferably, the pushing device comprises two first fixing plates, the two first fixing plates are respectively and fixedly arranged at the left side and the right side of the top end of the rear surface of the limestone material taking box, pushing rods are fixedly connected to opposite faces of one ends of the two first fixing plates, which are far away from the limestone material taking box, of the two first fixing plates, second fixing plates are fixedly connected to the lower surface of one ends of the two first fixing plates, which are far away from the limestone material taking box, and one ends of the two second fixing plates, which are far away from the first fixing plates, are fixedly connected with the rear surface of the limestone material taking box.

Preferably, the lifting device comprises two second T-shaped sliding blocks, the two second T-shaped sliding blocks are respectively and slidably mounted in the two second rectangular grooves, the two second T-shaped sliding blocks are respectively and fixedly mounted with fixed shafts on opposite surfaces of the two second T-shaped sliding blocks, the opposite ends of the two fixed shafts are respectively and rotatably connected with rear wheels, threaded rods are respectively arranged in the longitudinal middle positions of the upper surfaces of the two second T-shaped sliding blocks, the two threaded rods penetrate through the lower surface of the limestone material taking box, the two threaded rods are in threaded connection with the second T-shaped sliding blocks, and the two threaded rods are respectively and rotatably connected with the limestone material taking box.

Preferably, the driving device comprises two single-groove belt pulleys which are respectively and fixedly arranged on the outer surfaces of the bottom ends of the two threaded rods;

Wherein, the lower surface of the limestone feed box is fixedly provided with a second motor corresponding to the positions of the two single-groove belt pulleys, the outer surface of the output shaft of the second motor is fixedly provided with a double-groove belt pulley, the left single-groove belt pulley is in transmission connection with the outer groove of the double-groove belt pulley through a belt, and the right single-groove belt pulley is in transmission connection with the inner groove of the double-groove belt pulley through the same belt.

(III) beneficial effects

Compared with the prior art, the utility model has the beneficial effects that:

(1) This high lime stone of stability gets skip, when using this equipment, the normal position of dustpan is located the ground position, promote forward through the catch bar and get the skip, make the dustpan with inside lime stone shovel income dustpan, start first motor, the output shaft rotation of first motor drives the reel synchronous rotation, the reel rotates and makes wire rope rolling on the surface of reel, wire rope rolling makes first T shape slider shift up at the surface of reel, first T shape slider shifts up and drives the dustpan synchronous shift up, and then make the dustpan shift up to the top end in T shape groove, the inside track upset of T shape groove is followed to the dustpan shift up in-process, make the inside lime stone of dustpan pour into lime stone material taking box lime stone material incasement portion, after the lime stone is poured, make first motor reverse rotation, move down the dustpan to the normal position, make get material more high efficiency, the manpower is saved, the work efficiency of device is improved.

(2) This lime stone skip that stability is high, before the dustpan begins to shift up, start the second motor, the output shaft rotation of second motor drives the synchronous rotation of double-groove belt pulley, and then make two single-groove belt pulley synchronous rotation, two single-groove belt pulley synchronous rotation drive two threaded rods synchronous rotation, two threaded rods rotate and drive two second T shape sliders and shift up in step, two second T shape sliders shift up in step drive two fixed axles and shift up in step, and then make two rear wheels shift up, two rear wheels shift up and make the rear side of lime stone material case descend, the rear side of lime stone material case descends to the fixed block contact ground, the rubber strip of fixed block lower surface has anti-skidding function, guaranteed that the dustpan can not move in the time of operating condition, stability of device has been improved.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a schematic diagram of a high stability limestone taking vehicle;

FIG. 2 is an enlarged schematic view of the structure of FIG. 1A;

FIG. 3 is an enlarged schematic view of the structure of FIG. 1 at B;

FIG. 4 is a schematic view showing the bottom view of the limestone feed extracting tank of the present utility model;

FIG. 5 is an enlarged schematic view of the structure of FIG. 4 at C;

FIG. 6 is a schematic diagram of a cross-sectional structure of a limestone feed tank of the present utility model;

FIG. 7 is an enlarged schematic view of the structure of FIG. 6 at D;

FIG. 8 is a schematic side view of the limestone feed extracting tank of the present utility model.

Reference numerals: 1. a limestone material taking box; 2. a first rectangular groove; 3. a rectangular hole; 4. a front wheel; 5. a second rectangular groove; 6. a fixed block; 7. a rubber strip; 8. a circular rod; 9. a connecting plate; 10. a T-shaped groove; 11. a rotating disc; 12. a first T-shaped slider; 13. a wire rope; 14. a support plate; 15. a winding wheel; 16. a motor support; 17. a first motor; 18. a dustpan; 19. a first fixing plate; 20. a push rod; 21. a second fixing plate; 22. a second T-shaped slider; 23. a fixed shaft; 24. a rear wheel; 25. a threaded rod; 26. a single groove pulley; 27. a second motor; 28. a double groove pulley; 29. a belt.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present utility model and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, greater than, less than, exceeding, etc. are understood to exclude this number, and above, below, within, etc. are understood to include this number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present utility model, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present utility model can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Referring to fig. 1-8, the present utility model provides a technical solution: the limestone taking trolley with high stability comprises a limestone taking box 1, wherein a first rectangular groove 2 is formed in the transverse middle position of the front surface of the limestone taking box 1, and a guiding device is arranged in the first rectangular groove 2;

Wherein, the front end of the limestone material taking box 1 is provided with a rectangular hole 3 corresponding to the position of the first rectangular groove 2, and a winding device is arranged in the rectangular hole 3;

Wherein, a pushing device is arranged at the top end of the rear surface of the limestone taking box 1;

front wheels 4 are symmetrically and rotatably arranged at the front bottom ends of the left surface and the right surface of the limestone material taking box 1, second rectangular grooves 5 are correspondingly formed at the rear bottom ends of the left surface and the right surface of the limestone material taking box 1, and lifting devices are arranged in the two second rectangular grooves 5;

Wherein, the lower surface of the limestone taking box 1 is provided with a driving device; the rear end of the lower surface of the limestone material taking box 1 is fixedly provided with a fixed block 6 at a transverse middle position, and the lower surface of the fixed block 6 is uniformly and fixedly provided with a rubber strip 7.

Further, the guiding device comprises a circular rod 8, the circular rod 8 is fixedly arranged at the top end of the inner portion of the first rectangular groove 2, a connecting plate 9 is fixedly connected to the tangent position of the front side of the circular rod 8, T-shaped grooves 10 are formed in the transverse middle position of the front side surface of the circular rod 8 and the transverse middle position of the front surface of the connecting plate 9, the inner portions of the two T-shaped grooves 10 are communicated, and a rotating disc 11 is rotatably arranged on the transverse middle position of the rear side surface of the circular rod 8.

Further, the winding device comprises two support plates 14, the two support plates 14 are correspondingly and fixedly arranged on the lower surface of the inside of the rectangular hole 3, and winding wheels 15 are rotatably arranged on the opposite surfaces of the two support plates 14;

Wherein, the inside lower surface of rectangular hole 3 is close to right side backup pad 14 the position fixed mounting have motor support 16, and motor support 16's upper surface fixed mounting has first motor 17, and the output shaft of first motor 17 runs through backup pad 14 left surface and rotates with backup pad 14 to be connected, and the output shaft of first motor 17 is fixed connection with the right-hand member of rolling wheel 15.

Further, a first T-shaped sliding block 12 is slidably arranged in the T-shaped groove 10, a dustpan 18 is fixedly connected to the front surface of the first T-shaped sliding block 12, a steel wire rope 13 is fixedly connected to the middle position of the upper surface of the first T-shaped sliding block 12, one end of the steel wire rope 13 far away from the first T-shaped sliding block 12 bypasses the outer surface of the rotating disc 11 and then extends to the outer surface of the winding wheel 15, one end of the steel wire rope 13 far away from the first T-shaped sliding block 12 is fixedly connected with the outer surface of the winding wheel 15, when the device is used, the dustpan 18 is in a ground pasting position, the charging car is pushed forward by a pushing rod 20, so that the dustpan 18 scoops limestone into the dustpan 18, a first motor 17 is started, the output shaft of the first motor 17 rotates to drive the winding wheel 15 to synchronously rotate, the winding wheel 15 rotates to enable the steel wire rope 13 to be wound on the outer surface of the winding wheel 15, the steel wire rope 13 is wound on the outer surface of the winding wheel 15 to enable the first T-shaped sliding block 12 to move upwards, the first T-shaped sliding block 12 moves upwards to drive the dustpan 18 to move upwards synchronously, the dustpan 18 is further enabled to move upwards to the tail end of the top of the T-shaped groove 10, the dustpan 18 moves upwards to follow the inner track of the T-shaped groove 10 to overturn in the process of moving upwards, limestone inside the dustpan 18 is poured into the limestone taking box and the limestone taking box 1, after the limestone is poured, the first motor 17 rotates reversely, the steel wire rope 13 is released, the dustpan 18 moves downwards to the original position with the weight of the dustpan 18, so that the material taking is quicker and more efficient, manpower is saved, and the working efficiency of the device is improved.

Further, the pushing device comprises two first fixing plates 19, the two first fixing plates 19 are respectively fixedly installed on the left side and the right side of the top end of the rear surface of the limestone material taking box 1, pushing rods 20 are fixedly connected to opposite faces of one ends of the two first fixing plates 19, which are far away from the limestone material taking box 1, second fixing plates 21 are fixedly connected to the lower surfaces of one ends of the two first fixing plates 19, which are far away from the limestone material taking box 1, and one ends of the two second fixing plates 21, which are far away from the first fixing plates 19, are fixedly connected with the rear surface of the limestone material taking box 1.

Further, elevating gear includes two second T shape sliders 22, two second T shape sliders 22 slidable mounting respectively is in the inside of two second rectangular channels 5, equal fixed axle 23 is fixed mounting on the opposite sides of two second T shape sliders 22, equal rotation is connected with rear wheel 24 on the opposite sides of two fixed axles 23 from the end, the upper surface longitudinal intermediate position of two second T shape sliders 22 all is provided with threaded rod 25, the lower surface of lime stone material taking box 1 is all run through to two threaded rods 25, and two threaded rods 25 all with second T shape slider 22 threaded connection, two threaded rods 25 all rotate with lime stone material taking box 1 and be connected.

Further, the driving device comprises two single-groove belt pulleys 26, and the two single-groove belt pulleys 26 are fixedly arranged on the outer surfaces of the bottom ends of the two threaded rods 25 respectively;

The lower surface of the limestone feed box 1 is fixedly provided with a second motor 27 corresponding to the positions of two single-groove belt pulleys 26, the outer surface of an output shaft of the second motor 27 is fixedly provided with a double-groove belt pulley 28, the bottom ends of the double-groove belt pulleys 28 are arranged above the horizontal position of the bottom ends of the rubber strips 7, the left single-groove belt pulley 26 is in transmission connection with the outer grooves of the double-groove belt pulleys 28 through a belt 29, the right single-groove belt pulley 26 is in transmission connection with the inner grooves of the double-groove belt pulley 28 through the same belt 29, before the dustpan 18 starts to move upwards, the second motor 27 is started, the output shaft of the second motor 27 rotates to drive the double-groove belt pulley 28 to synchronously rotate, the two single-groove belt pulleys 26 further synchronously rotate, the two single-groove belt pulleys 26 synchronously rotate to drive the two threaded rods 25, the two second T-shaped sliding blocks 22 synchronously move upwards, the two fixed shafts 23 synchronously move upwards, the two rear wheels 24 move upwards, the rear side of the limestone feed box 1 descends, the limestone feed box 1 descends to the position of the fixed pulley 6, and the surface of the dustpan 6 is not contacted with the fixed pulley 6, and the feed box is prevented from moving to the surface of the fixed pulley 6.

Working principle: when the device is used, the original position of the dustpan 18 is positioned at the ground pasting position, the push rod 20 pushes the material taking trolley forwards, so that the dustpan 18 is used for shoveling limestone into the dustpan 18, the first motor 17 is started, the output shaft of the first motor 17 rotates to drive the winding wheel 15 to synchronously rotate, the winding wheel 15 rotates to enable the steel wire rope 13 to be wound on the outer surface of the winding wheel 15, the steel wire rope 13 is wound on the outer surface of the winding wheel 15 to enable the first T-shaped sliding block 12 to move upwards, the first T-shaped sliding block 12 moves upwards to drive the dustpan 18 to synchronously move upwards, the dustpan 18 moves upwards to the top end of the T-shaped groove 10, the inner track of the T-shaped groove 10 is overturned along during the upward movement of the dustpan 18, so that the limestone in the dustpan 18 is poured into the limestone taking box 1, after the limestone is overturned, the first motor 17 reversely rotates, the steel wire rope 13 is wound, the dustpan 18 moves downwards to the original position under the weight of the dustpan 18, the material taking is faster and more efficient, the labor is saved, the working efficiency of the device is improved, before the dustpan 18 starts to move upwards, the second motor 27 is started, the output shaft of the second motor 27 rotates to drive the double-groove belt pulley 28 to synchronously rotate, the two single-groove belt pulleys 26 synchronously rotate to drive the two threaded rods 25 to synchronously rotate, the two threaded rods 25 rotate to drive the two second T-shaped sliding blocks 22 to synchronously move upwards, the two second T-shaped sliding blocks 22 synchronously move upwards to drive the two fixed shafts 23 to synchronously move upwards, the two rear wheels 24 move upwards, the rear side of the limestone material taking box 1 descends to the ground when the fixed block 6 contacts the ground, the rubber strip 7 on the lower surface of the fixed block 6 has an anti-skid function, the condition that the material taking box is prevented from moving when the dustpan 18 is in a working state is ensured, the stability of the device is improved.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (7)

1. The utility model provides a high limestone material taking vehicle of stability, includes limestone material taking box (1), its characterized in that: a first rectangular groove (2) is formed in the transverse middle position of the front surface of the limestone taking box (1), and a guide device is arranged in the first rectangular groove (2);

wherein, a rectangular hole (3) is arranged at the front end of the limestone material taking box (1) corresponding to the first rectangular groove (2), and a winding device is arranged in the rectangular hole (3);

wherein, a pushing device is arranged at the top end of the rear surface of the limestone taking box (1);

Front wheels (4) are symmetrically and rotatably arranged at the front bottom ends of the left surface and the right surface of the limestone material taking box (1), second rectangular grooves (5) are correspondingly formed at the rear bottom ends of the left surface and the right surface of the limestone material taking box (1), and lifting devices are arranged in the two second rectangular grooves (5);

wherein, the lower surface of the limestone taking box (1) is provided with a driving device; the rear end of the lower surface of the limestone material taking box (1) is fixedly provided with a fixed block (6) at the transverse middle position, and the lower surface of the fixed block (6) is uniformly and fixedly provided with a rubber strip (7).

2. The high stability limestone feed truck of claim 1 wherein: the guiding device comprises a round rod (8), the round rod (8) is fixedly arranged at the top end of the inner portion of the first rectangular groove (2), a connecting plate (9) is fixedly connected to the front side position of the round rod (8), T-shaped grooves (10) are formed in the transverse middle position of the front side surface of the round rod (8) and the transverse middle position of the front surface of the connecting plate (9), the two T-shaped grooves (10) are communicated, and a rotating disc (11) is rotatably arranged on the transverse middle position of the rear side surface of the round rod (8).

3. The high stability limestone feed truck of claim 1 wherein: the winding device comprises two supporting plates (14), the two supporting plates (14) are correspondingly and fixedly arranged on the inner lower surface of the rectangular hole (3), and winding wheels (15) are rotatably arranged on opposite surfaces of the two supporting plates (14);

The motor support (16) is fixedly arranged at the position, close to the right side support plate (14), of the lower surface of the inside of the rectangular hole (3), the first motor (17) is fixedly arranged on the upper surface of the motor support (16), an output shaft of the first motor (17) penetrates through the left surface of the support plate (14) and is rotationally connected with the support plate (14), and an output shaft of the first motor (17) is fixedly connected with the right end of the winding wheel (15).

4. A highly stable limestone picking carriage as claimed in claim 2 wherein: the inside slidable mounting of T-shaped groove (10) has first T shape slider (12), the preceding fixed surface of first T shape slider (12) is connected with dustpan (18), fixedly connected with wire rope (13) on the upper surface intermediate position of first T shape slider (12), the one end that wire rope (13) kept away from first T shape slider (12) extends to the surface of rolling wheel (15) after bypassing the surface of rolling dish (11), and the one end that wire rope (13) kept away from first T shape slider (12) is connected with the surface fixed of rolling wheel (15).

5. The high stability limestone feed truck of claim 1 wherein: the pushing device comprises two first fixing plates (19), the two first fixing plates (19) are respectively and fixedly installed on the left side and the right side of the top end of the rear surface of the limestone material taking box (1), pushing rods (20) are fixedly connected to opposite faces of one end, far away from the limestone material taking box (1), of the two first fixing plates (19), second fixing plates (21) are fixedly connected to the lower surface of one end, far away from the limestone material taking box (1), of the two first fixing plates (19), and one end, far away from the first fixing plates (19), of the two second fixing plates (21) is fixedly connected with the rear surface of the limestone material taking box (1).

6. The high stability limestone feed truck of claim 1 wherein: the lifting device comprises two second T-shaped sliding blocks (22), the two second T-shaped sliding blocks (22) are respectively and slidably mounted in the two second rectangular grooves (5), fixed shafts (23) are fixedly mounted on opposite surfaces of the two second T-shaped sliding blocks (22), rear wheels (24) are rotatably connected to opposite ends of the two fixed shafts (23), threaded rods (25) are arranged in the middle of the longitudinal positions of the upper surfaces of the two second T-shaped sliding blocks (22), the two threaded rods (25) penetrate through the lower surface of the limestone material taking box (1), the two threaded rods (25) are in threaded connection with the second T-shaped sliding blocks (22), and the two threaded rods (25) are rotatably connected with the limestone material taking box (1).

7. The high stability limestone feed truck of claim 6 wherein: the driving device comprises two single-groove belt pulleys (26), and the two single-groove belt pulleys (26) are respectively and fixedly arranged on the outer surfaces of the bottom ends of the two threaded rods (25);

The limestone feeding box comprises a limestone feeding box (1), a second motor (27) is fixedly arranged on the lower surface of the limestone feeding box (1) corresponding to the positions of two single-groove belt pulleys (26), a double-groove belt pulley (28) is fixedly arranged on the outer surface of an output shaft of the second motor (27), the left single-groove belt pulley (26) is in transmission connection with the outer groove of the double-groove belt pulley (28) through a belt (29), and the right single-groove belt pulley (26) is in transmission connection with the inner groove of the double-groove belt pulley (28) through the same belt (29).