JP5051837B2 - Rail adjustment structure for rail transport vehicles - Google Patents

Description

  The present invention relates to a belt adjustment structure for a rail vehicle that adjusts the tension of a belt that transmits engine power to a mission.

  A rail transport vehicle is known in which a rail (many end rails) with a rack attached to a slope such as a mountainside is installed, and a pinion (driving wheel) meshing with the rack is driven to run the rail as a guide. It is used for the purpose of transporting personnel, materials, or harvested products to orchards that open on the mountainside and construction sites in the mountains. Such a rail vehicle is equipped with an internal combustion engine type engine, transmits the engine power to the mission via a belt, and travels with a pinion attached to the output shaft of the mission meshing with the rack.

  By the way, the rail generally has an upward slope from the start point to the end point. Therefore, the posture of the engine is set to the forward leaning posture along the gradient of the rail. This is because when the engine is mounted horizontally, the engine is adversely affected when traveling on a gradient (inclination). Specifically, when the engine is inclined, the oil level of the lubricating oil is inclined and scraped up. This is because it becomes impossible to cause seizure, or the fuel oil surface is tilted and the carburetor operates poorly.

  In this type of transport vehicle, there is a case where a heavy load is always applied to the engine when the vehicle is climbing up, the belt is extended and the driving force is decreased, and the vehicle cannot be climbed when the vehicle is steep. Therefore, the belt tension must be relatively repeated. In general, the tension of the belt is adjusted by attaching a tension pulley to the tip of a rotatable arm and tensioning the belt. When adjusting the tension, the arm is rotated to stretch or loosen the belt. However, since this type of rail transporter has a short center distance between the engine and the transmission, there is often no space for attaching a tension pulley. In addition, according to the tension pulley, the belt may be bent, resulting in poor durability.

  Therefore, in the rail transport vehicle, a belt is stretched directly on the engine and the transmission without providing a tension pulley. With such a configuration, when the belt is stretched, the distance between the engine and the mission must be separated, so that the position of the engine or / and the mission can be moved, both of which are heavy. , Demands great power. It is also difficult to adjust the belt tension to an appropriate position.

  The present invention addresses the above-described problems, and supports the engine in a frame so as to be pivotable in the front-rear direction and adjusts the tension of the belt so as to cope with this pivoting operation. Then, when an adjustment amount that greatly changes the tilt posture of the engine is required or when the belt is replaced, the front and rear positions of the engine can be changed.

Under the above-described problems, the present invention provides a belt adjustment structure for a rail transport vehicle in which an engine mounted on a frame and a transmission are connected by a belt according to claim 1, and an adapter can be moved back and forth and fixed to the frame. Attaching to the adapter, a mounting base that can be rotated and fixed around the support pin is attached to the adapter, the engine is fixed to the mounting base, and a first push bolt is screwed onto the rear part of the adapter. A rail characterized in that the tip is brought into contact with a platform at a position behind the support pin, the second push bolt is screwed into the front portion of the adapter, and the tip of the second push bolt is brought into contact with the frame. A belt adjustment structure for a transport vehicle is provided.

According to the present invention, in the adjustment structure described above, the fan-shaped long hole centered on the support pin is formed in the mounting base described in claim 2, and the mounting hole is formed in the adapter corresponding to the long hole. A means for inserting a bolt from the long hole into the mounting hole and fixing the mounting base to the adapter so as to be able to rotate back and forth, and providing the frame with a long hole in the front-rear direction and a screw hole in the adapter. Provided is a means for fixing the adapter so that it can be moved back and forth with respect to the frame by screwing a bolt into the screw hole from the long hole.

  Furthermore, the present invention comprises the first screw hole group and the second screw hole group, which are composed of two screw holes in which the screw hole of the adapter is inclined and has different front and rear positions. Provided is a means in which a bolt is screwed into a first screw hole group or a second screw hole group to fix the adapter to the frame so that the adapter can be moved back and forth and tilted back and forth.

  According to the means of the first aspect, the belt can be stretched by rotating the engine forward (on the opposite mission side) around the support pin with respect to the belt extension. In this case, the angle of inclination of the engine is different only by tensioning the belt (the forward tilting becomes stronger), but the amount is negligible and often negligible. In many cases, the belt can be tensioned only by this operation. Therefore, the belt tension adjustment operation is simple and easy. On the other hand, if this operation is repeated many times and the engine tilt angle exceeds the set value, the engine tilt angle can be returned to the set value by moving the adapter back and forth.

Then, the rotation of the engine (stand) by operating the first push bolt, in particular, it shall forward turning tensioning a belt that can be, yet stepless light force, also the engine by operating the second bolt (adapter) The back and forth movement of the belt, in particular, the forward movement of the belt can be performed with a light force and steplessly. Further, the means of claims 2 to 4 are specific examples of the back and forth movement and the back and forth rotation of the adapter and the platform, all of which are simple in structure and easy to operate.

  The best mode for carrying out the present invention will be described below with reference to the drawings. Since this type of rail transport vehicle is well known, the details will be explained here. In short, a rail with a rack attached to the ground is installed, and a pinion (drive wheel) meshing with the rack is driven to guide the rail. It is something to run. In this regard, the transport vehicle is usually divided into a cart that loads and a tow vehicle that pulls the cart. FIG. 1 is a side view of the towing vehicle 1 and FIG. 2 is a partially sectional rear view, in which an engine 3 is mounted on the front portion of the frame 2 and a mission 4 is mounted on the rear thereof. A part of the mission 4 hangs down on one side of the rail 5, and the drive wheel 6 that rolls the rail 5 and the three rolling wheels 7 are quadrangular in side view so as to be sandwiched from above and below the rail 5. It is attached in the form.

  An adapter 8 is attached to the front portion of the frame 2, and a mounting base 9 is attached to the adapter 8, and the engine 3 is installed on the mounting base 9. The adapter 8 and the mount 9 will be described later. An output pulley 10 is attached to the output shaft of the engine 3, and power is transmitted by a belt 12 to an input pulley 11 attached to the input shaft of the mission 4.

  The towing vehicle travels with a travel stop lever 13 provided in the mission 4. That is, when the travel stop lever 13 is pulled rearward (or tilted forward), the cam 14 provided at the root rotates the accelerator lever 15 rearward and pulls the accelerator wire 16 to reduce the rotational speed of the engine 3. Then, a pinion 6 ′ provided on the drive wheel 6 of the mission 4 is driven to kick the rack 17 attached to the rail 5 and travel. As described above, the transport vehicle has a forced-meshing traveling form using the rack 17 and the pinion 6 ', and is characterized by being able to travel even on a steep slope.

  On the other hand, a brake operating lever 18 is linked to the accelerator lever 15 by a rod 19, and when the accelerator lever 15 is rotated backward, the brake operating lever 18 is operated and the brake incorporated in the transmission shaft of the transmission 4. Is to be released. On the contrary, when the travel stop lever 13 is tilted forward (or rearward), the cam lever 14 rotates the accelerator lever 15 forward to loosen the accelerator wire 16 and simultaneously operates the brake operating lever 18 to apply the brake. Put it in a state that That is, for the sake of safety, when the traveling of the transport vehicle is stopped, the brake is always in effect. Further, the stop lever 20 extends downward from the travel stop lever 13, and when it hits a stop bar (not shown) provided on the rail 5 or the like, the travel stop lever 13 is operated to the stop side to travel. Is to stop.

  Since this transport vehicle moves up and down a considerable steep slope, the posture of the engine 3 is also set to an angle inclined forward along the inclination of the rail 5. That is, the attitude of the engine 3 is made almost horizontal regardless of the inclination of the rail 5. By the way, since the belt 12 extends with use, the belt 12 must be stretched to an appropriate tension. In some cases, the belt 12 may be replaced. At this time, the distance between the centers of the engine 3 and the transmission 4 must be once reduced and then increased again. In view of this, the present invention has been made simple and easy by securing an appropriate forward tilting posture of the engine 3, and is performed by the adapter 8 and the platform 9 described below.

  FIGS. 3 and 4 are partial side views showing these relationships, and FIG. 5 is a partially sectional front view. The adapter 8 is a plate body, and has a pin hole 21 on the upper side and mounting holes on both sides (front and rear). The first screw hole group 23 and the second screw hole group 24, which are composed of two screw holes 23a, 23b, 24a, and 24b having the same center-to-center distance below each other but different in inclination and front-rear position, Is formed. On the other hand, the frame 2 is formed with a long hole 25 extending forward and backward with a length corresponding to the pitch of the screw holes 23a, 23b, 24a, 24b of the first screw hole group 23 and the second screw hole group 24 as a standard. Has been.

  Then, bolts 26 are screwed into the two screw holes 23a, 23b, 24a, 24b of any of the screw hole groups 23, 24 from the long hole 25 and fixed. At this time, by changing the position of the long hole 25 through which the bolt 26 is passed, the adapter 8 can be fixed to the frame 2 by adjusting the front-rear position. Further, by selecting the first screw hole group 23 or the second screw hole group 24, the inclination posture of the adapter 8 with respect to the frame 2 can be changed. In addition, although screw hole 23a, 23b, 24a, 24b was formed in the adapter 8, you may make it a through-hole and fasten with the nut through the volt | bolt 26. FIG.

  The mounting base 9 is a base plate having a substantially T-shape in rear view, which includes a horizontal portion 9a and a vertical portion 9b. Pin holes 27 are provided in the vertical portion 9b, and two pins centering on the pin holes 27 are provided on both sides thereof. Two fan-shaped long holes 28 are formed. The pin hole 27 and the adapter pin hole 21 are supported by a support pin 29 so as to be pivotable back and forth, and are fixed to the attachment hole 22 and the long hole 28 of the adapter 8 by bolts 30. At this time, by changing the position of the long hole 28 with respect to the bolt 30, the platform 9 is fixed to the adapter 8 by changing the inclination posture in the front-rear direction. The engine 3 is installed with bolts 31 on the horizontal portion 9a. In this case, it is preferable to set the pin hole 27 at a position directly below the output shaft when the engine 3 is leveled because the posture change is efficient. In addition, the bracket 32 protrudes from the surface of the adapter 8 on the transmission 4 side, and the first push bolt 33 is screwed into the bracket 32 so that the tip thereof is in contact with the rear portion of the horizontal portion 9a of the platform 9 (behind the support pin 29). Let me win.

  Next, the case where the belt 12 is stretched with the above configuration will be described. When the belt 12 is extended as it is used, first, the bolt 30 is loosened, the first push bolt 33 is pushed, and the platform 9 is supported by the support pin 29. Rotate forward around the center. In this case, the platform 9 is in contact with the first push bolt 33 by the tension of the belt 12, and when the first push bolt 33 is advanced, the engine 3 tilts forward. If the center of gravity of the engine 3 is set behind the support pin 29 (on the side of the transmission 4), the first push bolt 33 is retracted even when the engine 3 is rotated backward when the belt 12 is replaced. Just do it. The first push bolt 33 also serves as a stopper for backward rotation due to the weight of the engine 3.

  As a result, the engine 3 is tilted forward and the belt 12 is stretched. Therefore, if the forward tilt angle is an allowable value when the appropriate tension is reached, the bolt 30 is tightened and fixed. The first push bolt 33 is characterized in that this operation can be adjusted steplessly with a light force. Such an operation is performed every time the belt 12 is loosened. However, since the inclination posture of the engine 3 is not so severely required, in many cases, this operation is sufficient and simple. On the other hand, if this operation is repeated many times and the original angle exceeds the allowable value, the forward tilt angle is returned to the allowable value, the bolt 26 of the adapter 8 is loosened, the adapter 8 is moved forward, and the tension of the belt 12 is increased. The bolt 26 is tightened and fixed appropriately. Further, the same applies when the belt 12 is replaced. The first push bolt 33 is loosened, the mounting base 9 is largely tilted toward the transmission 4 side, and after the belt 12 is replaced, the mounting base 9 is rotated forward again. . This operation can also be performed by moving the first push bolt 33 forward and backward.

  The adapter 8 itself can also be tilted back and forth. Specifically, the adjustment range is expanded by adjusting the mounting posture of the adapter 8 with respect to the frame 2 and / or the mounting posture of the mounting base 9 with respect to the adapter 8. 3 and 4, the adapter 8 is fixed to the front portion of the long hole 25 of the frame 2, and the platform 9 is fixed to the adapter 8 by turning the long hole 25 fully counterclockwise. This is the state (a), in which the long hole 28 is turned clockwise and fixed in the state (b). In this state, it is moved to the rear part of the long hole 25 of the frame 2. This is the state (c). Further, the state (d) uses the screw holes 23a, 23b of the first screw hole group 23, and the state (e) uses the screw holes 24a, 24b of the second screw hole group 24. is there.

FIGS. 6 and 7 are side views of the main part showing the back-and-forth movement of the adapter 8, but the back-and-forth movement of the adapter 8 with respect to the frame 2 may be performed by hand. In particular, when the belt 12 is stretched, the engine 3 is mounted. The adapter 8 is heavy and difficult. For this reason, a bent portion 34 that bends by 90 ° is provided at the tip of the adapter 8, a screw hole 34 a is formed in this, and the second push bolt 35 is screwed together so that the tip contacts the frame 2. According to this, if the bolt 26 is loosened and the second push bolt 35 is advanced, the adapter 8 moves forward and tensions the belt 12 (releasing the operation is the reverse of this). According to the second push bolt 35, this operation is characterized by a stepless adjustment with a light force. Since the inclination posture of the adapter 8 changes, it is preferable to provide a plurality of screw holes 34a according to each posture so that the second push bolt 35 pushes the frame 2 straight.

It is a side view of the towing vehicle of a rail transport vehicle. It is a partial rear sectional view of the towing vehicle of the rail transport vehicle. It is a partial side view which shows the relationship between a flame | frame, an adapter, and a mounting stand. It is a partial side view which shows the relationship between a flame | frame, an adapter, and a mounting stand. It is a partial front sectional view which shows the relationship between a flame | frame, an adapter, and a mount. It is a principal part side view of the structure which moves an adapter back and forth. It is a principal part side view of the structure which moves an adapter back and forth.

2 frame 3 engine 4 mission 8 adapter 9 platform 12 belt 23 first screw hole group 24 second screw hole group 25 long hole 26 bolt 28 long hole 29 support pin 30 bolt 31 bolt 33 first push bolt 35 second push bolt 35

Claims (4)

This is a belt adjustment structure for a rail vehicle that connects the engine and transmission mounted on the frame with a belt. The adapter can be moved back and forth and fixed to the frame, and the adapter can be rotated and fixed around the support pin. Attaching a mounting base, fixing the engine to the mounting base, screwing the first push bolt to the rear part of the adapter, contacting the tip end of the first push bolt to the stand at the rear of the support pin, and A belt adjustment structure for a rail transport vehicle, wherein a second push bolt is screwed into a front portion of an adapter, and a tip of the second push bolt is brought into contact with a frame .   A fan-shaped long hole centered on the support pin is formed in the mounting base, and a mounting hole is formed in the adapter corresponding to the long hole, and a bolt is inserted into the mounting hole from the long hole to rotate the mounting base in the longitudinal direction. 2. The belt adjustment structure for a rail vehicle according to claim 1, wherein the belt adjustment structure is fixed to the adapter.   The rail transportation according to claim 1 or 2, wherein a long hole in the front-rear direction is provided in the frame, a screw hole is provided in the adapter, and a bolt is screwed into the screw hole from the long hole to fix the adapter so as to be movable back and forth with respect to the frame. Car belt adjustment structure.   The screw hole of the adapter is composed of a first screw hole group and a second screw hole group consisting of two screw holes whose tilt and front / rear positions are different, and a bolt is connected from the long hole of the frame to the first screw hole group or the second screw hole group. 4. The rail adjustment structure of the rail vehicle according to claim 3, wherein the adapter is fixed to the frame so that the adapter can be moved back and forth and tilted back and forth.