JP3154003U - Industrial vehicle - Google Patents

Abstract

An object of the present invention is to provide an industrial vehicle with higher safety by preventing a flexible long object from being wound around an attachment portion of a brake pipe and a surrounding brake pipe. A forklift includes an axle, an axle support component, a fixed plate, a drum, a brake, and a brake pipe. The brake pipe 19 has an attachment portion 20 attached to the fixed plate 31. The fixed plate 31 is positioned in the vicinity of the attachment portion 20, and a string is wound around the attachment portion 20 and the brake pipe 19 around the attachment portion 20. Two boss portions 21 for preventing this are provided. Each boss portion 21 has a support portion 211 that separates the string from the axis O of the axle. The distance between the support portion 211 and the shaft center is longer than the distance between the mounting portion 20 and the shaft center. [Selection] Figure 3

Description

  The present invention relates to an industrial vehicle.

  Vehicles such as passenger cars and industrial vehicles include axle support parts that are connected to the vehicle body and support the axles. As a braking device for the vehicle, a hydraulic brake device is often used.

  The hydraulic brake device includes a brake body that is a drum brake or a disc brake, and a brake pipe connected to the brake body. The brake body is disposed inside each wheel. For example, in the case of a drum brake, the brake main body is provided with a fixed plate that is non-rotatably provided on the axle support component, a drum that is provided at one end of the axle and rotates with the wheel, and is provided on the fixed plate to brake the drum. And a braking portion. The brake pipe has a mounting portion for connecting to the fixed plate. That is, the brake piping, particularly the mounting portion thereof, is connected to the fixed plate in the vicinity of the wheel and the axle support component.

  The brake pipe is filled with brake oil, and the driver's brake operation is transmitted to the brake portion of the brake body as the pressure of the brake oil. The braking unit operates when pressure is transmitted, and brakes the rotational motion of the drum.

  In this hydraulic brake device, when a force is applied to the brake pipe from the outside, the brake pipe may be damaged to cause oil leakage or the brake pipe may come off the fixed plate. In such a case, the brake operation of the driver is not normally transmitted to the braking unit or is not transmitted to the braking unit at all. In these states, not only the braking performance of the vehicle is deteriorated, but also the vehicle cannot be braked.

  In order to avoid the state as described above, Patent Document 1 discloses a vehicle that protects brake piping. This vehicle has a bracket attached so as to protrude from the axle support component side toward the brake piping side. In this vehicle, the bracket narrows the distance between the axle support part and the brake pipe, so even if the tire chain wraps around the axle support part side, the tire chain is between the axle support part and the brake pipe. Can be prevented from entering. For this reason, in this vehicle, it is possible to prevent the brake piping from being damaged, and the safety is further improved.

Japanese Utility Model Publication No. 57-73265

  However, in the above conventional vehicle, a flexible long object such as a string is wound around the mounting portion and the surrounding brake piping, and the tightening force of the wound long object is applied to the mounting portion and the surrounding brake piping. There is a possibility that the brake pipe may be damaged by acting on the. Such a fear is conspicuous in an industrial vehicle that may travel in an environment where flexible long objects are scattered.

  As a means for protecting the brake pipe from the tightening force of the wound long object, for example, a means for increasing the rigidity of the brake pipe itself by increasing the thickness of the brake pipe can be considered. Further, for example, a means for increasing the overall rigidity by winding a member that serves as a protective material around the brake pipe is also conceivable. However, the brake pipe has a predetermined inner diameter required to transmit the hydraulic pressure fluctuation of the brake oil filled therein to the braking part. I have to. When the outer diameter is increased in this way, the manufacturing cost of the brake pipe itself increases, and there arises a problem that the degree of freedom in mounting the brake pipe decreases.

  Further, the tightening force generated by the rotation of the wheel is not always constant. For this reason, it is not clear how much the rigidity of the brake pipe can be increased to prevent damage. For this reason, there is a limit to increasing the rigidity of the brake pipe itself.

  The present invention has been made in view of the above-described conventional situation, and prevents a flexible long object from being wound around the mounting portion and the surrounding brake piping, thereby providing a more secure industry. Providing vehicles is an issue to be solved.

The industrial vehicle of the present invention is connected to a vehicle body, and supports an axle, a non-rotating portion provided non-rotatably on the axle support, and one end of the axle, and the wheel is fixed. A rotating portion that rotates relative to the non-rotating portion together with the axle, a braking portion that is provided in the non-rotating portion and brakes the rotating portion, and a brake pipe that is attached to the non-rotating portion and operates the braking portion by hydraulic pressure In an industrial vehicle with
The brake pipe has an attachment part attached to the non-rotating part,
The axle support component or the non-rotating portion is positioned in the vicinity of the mounting portion, and is a protection that prevents a flexible long object from being wound around the mounting portion and the brake pipe around the mounting portion. Means are provided,
The protection means has a support part that separates the long object from the axis of the axle, and the distance between the support part and the axis is longer than the distance between the mounting part and the axis. (Claim 1).

  The industrial vehicle according to the present invention travels by rotating a rotating part provided on an axle and wheels fixed to the rotating part. On the other hand, in this industrial vehicle, the braking unit is operated by hydraulic pressure, and the rotational movement of the rotating unit is braked. For this reason, the rotational motion of the wheels is braked, and the traveling speed of the industrial vehicle decreases or the industrial vehicle stops.

  In this industrial vehicle, the protection means prevents a long object from being wound around the attachment portion and the surrounding brake piping. The protection means is located in the vicinity of the mounting portion, and the support portion separates the long object from the axis of the axle. The distance between the support portion and the shaft center is longer than the distance between the mounting portion and the shaft center. For this reason, even if a wheel rotates and a long thing winds around the attachment part and the brake piping of the circumference | surroundings, a support part supports the wound long thing. For this reason, it is possible to prevent the long object from being directly wound around the attachment portion and the brake piping around the attachment portion. For this reason, even if a tightening force is generated in the long object wound by the rotation of the wheel, the tightening force acts on the support portion, and the tightening force does not act on the brake pipe. For this reason, it is possible to prevent a fear that the brake pipe is detached from the non-rotating portion or the brake pipe is damaged.

  Therefore, the industrial vehicle of the present invention can exhibit high safety.

  In addition, according to this industrial vehicle, in order to protect the brake pipe from the tightening force caused by a wound long object, the thickness of the brake pipe itself is increased or a protective material is wound around the brake pipe, There is no need to increase its rigidity. Further, in this industrial vehicle, brake piping having a conventional structure can be used, so that it is possible to prevent an increase in the manufacturing cost of the brake piping and the degree of freedom in mounting the brake piping is not lowered.

  Examples of the flexible long object include a string, a chain, a wire, a resin-made fixing band, an adhesive tape, and the like.

  In the industrial vehicle of the present invention, it is preferable that the protection means has two support portions that sandwich the attachment portion. In this case, it is not necessary to move the support portion far away from the axle center. In other words, even if the difference between the distance between the support portion of the protective means and the shaft center and the distance between the mounting portion and the shaft center is not increased, a long object is effectively wound around the mounting portion and the surrounding brake piping. It can prevent sticking. For this reason, when a protection means is provided in a non-rotating part, it is not necessary to enlarge the non-rotating part.

  In the industrial vehicle of the present invention, it is preferable that the support portion is a projecting body projecting from the non-rotating portion side toward the axle support component side. It is also preferable that the protection means is a plate-like body provided on the axle support component and having a side extending parallel to the axle as a support portion. In these cases, since the protection means can have a simple structure, an increase in the manufacturing cost of the protection means can be prevented.

  Further, when the protection means is a plate-like body, the support part preferably has a convex part that bulges away from the axial center at one end on the non-rotating part side and the other end side (claims). Item 5). In this case, since the flexible long object is held in the convex portions at both ends of the support part, it is more reliable and prevents the long object from being wrapped around the mounting part and the surrounding brake piping. it can.

It is a side view of the forklift of Example 1,2. It is a perspective view which shows the suspension of the drive wheel in the forklift truck of Example 1. FIG. FIG. 3 is a partially enlarged view showing a suspension of drive wheels in the forklift according to the first embodiment. It is a front view which shows the state in which the string was wound around the suspension of the drive wheel in the forklift of Example 1. FIG. 6 is a partially enlarged view showing a suspension of drive wheels in a forklift according to a second embodiment.

  Embodiments 1 and 2 embodying the present invention will be described below with reference to the drawings. The industrial vehicle of Example 1, 2 is a forklift shown in FIG.

(Example 1)
This forklift is provided with a pair of left and right drive wheels 2 at the front part of a machine frame 1 that is a vehicle body, and a pair of left and right steering wheels 3 at the rear part of the machine frame 1. Further, the forklift is provided with a mast device 4 on the front side of the machine base frame 1. A lift bracket 10 is attached to the mast device 4 so as to be movable up and down, and the lift bracket 10 is provided with a pair of left and right forks 12.

  A driver seat 5 is provided on the machine frame 1, and an engine (not shown) as a drive source is provided below the driver seat 5. A steering wheel 6 and a brake pedal 9 are provided in front of the driver's seat 5, and a front pillar 7 and a rear pillar 8 are provided around the driver's seat 5.

  2 and 3 show the suspension of the driving wheel 2 of the forklift in the first embodiment. This forklift includes an axle 11, an axle support component 13, an axle housing 15, a drum brake 17 as a hydraulic brake body, a brake pipe 19, and a boss portion 21 as a protection means. 2 and 3 show the undercarriage of the right drive wheel 2, the undercarriage of the left drive wheel 2 also has the same structure as the left and right are reversed.

  As shown in FIGS. 2 and 4, the axle 11 and the engine are connected by a gear (not shown). The axle 11 is disposed in an axle housing 15 described later.

  As shown in FIG. 4, the axle support component 13 has an axle hole 13a, and the axle 11 is rotatably supported by inserting the axle 11 into the axle hole 13a. As shown in FIGS. 2 to 4, an axle housing 15 and a drum brake 17 are fixed to the axle support part 13. As shown in FIG. 4, the axle support part 13 is fixed to the end surface of the axle housing 15 by a plurality of bolts 40 between the axle housing 15 and the drum brake 17.

  As shown in FIGS. 2 and 3, the axle housing 15 is fixed to the machine base frame 1. The axle housing 15 surrounds and supports the axle 11 and connects the axle frame 1 to the axle support component 13 fixed to the end face of the axle housing 15 on the drive wheel 2 side.

  As shown in FIGS. 2 to 4, the drum brake 17 includes a fixed plate 31 as a non-rotating part, a drum 32 as a rotating part, and a braking part 33. A brake pipe 19 to be described later is connected to the drum brake 17.

  The fixed plate 31 is fixed to the axle housing 15 so as not to rotate. The fixed plate 31 is provided with two boss portions 21 and an attachment port 35 for connecting to the brake pipe 19. A bleeder plug 37 for bleeding air inside the brake pipe 19 is attached above the attachment port 35.

  The drum 32 is provided at one end of the axle 11, and the drive wheel 2 is fixed via a hub (not shown) provided inside the drum 32. The drum 32 is disposed inside the drive wheel 2. The drum 32 rotates relative to the fixed plate 31 together with the axle 11. Since the drum 32 has the same configuration as a known hydraulic drum brake drum, details regarding the configuration of the drum 32 are omitted.

  The braking portion 33 is provided inside the fixed plate 31. Since the brake unit 33 has the same configuration as that of a known hydraulic drum brake, details regarding the configuration of the brake unit 33 are omitted.

  As shown in FIGS. 2 to 4, one end of the brake pipe 19 has an attachment portion 20 for attaching the brake pipe 19 to the fixed plate 31. By attaching the attachment portion 20 to the attachment port 35, the fixed plate 31 and the brake pipe 19 are connected. The other end of the brake pipe 19 is connected to the brake pedal 9 (see FIG. 1) via a master cylinder or the like (not shown). The brake pipe 19 is filled with brake oil.

  As shown in FIGS. 2 to 4, the boss portion 21 is a projecting body projecting from the fixed plate 31 side toward the axle housing 15 side. The boss part 21 has a support part 211 that separates the wound string 41 from the axis O of the axle 11.

  As shown in FIGS. 2 to 4, in the forklift according to the first embodiment, the two boss portions 21 are provided on the fixed plate 31 so as to sandwich the attachment portion 20 in the vicinity of the attachment portion 20. Each boss portion 21 is provided such that a distance a between each support portion 211 and the axis O is longer than a distance b between the mounting portion 20 and the axis O.

  In the forklift of the first embodiment configured as described above, the axle 11 is rotationally driven by the driving force generated by the engine. For this reason, the forklift travels in the front-rear direction as the left and right drums 32 provided on the axle 11 and the drive wheels 2 fixed to the drums 32 rotate. On the other hand, when the operator operates the brake pedal 9, the pressure of the brake oil in the brake pipe 19 varies. By transmitting the oil pressure of the changed brake oil, the left and right braking portions 33 are operated to brake the rotational movement of the left and right drums 32. For this reason, the rotational motion of the left and right drive wheels 2 is braked, and the traveling speed of the forklift is reduced or the forklift stops.

  In this forklift, as shown in FIG. 4, the two boss portions 21 prevent the string 41 from being wound around the attachment portion 20 and the surrounding brake pipe 19. Each boss portion 21 is located in the vicinity of the attachment portion 20, and each support portion 211 separates the string 41 from the axis O of the axle 11. A distance a between each support portion 211 and the axis O is longer than a distance b between the mounting portion 20 and the axis O. For this reason, even if the drive wheel 2 rotates and the string 41 is wound around the attachment portion 20 and the surrounding brake pipe 19, the support portions 211 support the wound string 41. That is, the string 41 is wound between the axle support part 13 and each support part 211. For this reason, it is possible to prevent the string 41 from being directly wound around the attachment portion 20 and the brake pipe 19 around it. For this reason, even if a tightening force is generated in the string 41 wound by the rotation of the drive wheel 2, the tightening force acts on the support portion 211, and no tightening force acts on the brake pipe 19. For this reason, it is possible to prevent the brake pipe 19 from being detached from the fixed plate 31 or the brake pipe 19 being damaged.

  Therefore, this forklift can exhibit high safety.

  In particular, as shown in FIGS. 2 to 4, each boss portion 21 provided in the forklift is a projecting body projecting from the fixed plate 31 side toward the axle housing 15 side. Thus, by making the boss | hub part 21 a simple structure, the increase in the manufacturing cost of a protection means can be prevented. In addition, by providing the two boss portions 21 so as to sandwich the attachment portion 20, it is not necessary to greatly distant each support portion 211 from the axis O of the axle 11. That is, even if the difference between the distance a between each support portion 211 of each boss portion 21 and the axis O and the distance b between the attachment portion 20 and the axis O is not increased, the attachment portion 20 and its It is possible to prevent the string 41 from being wound around the surrounding brake pipe 19. For this reason, it is not necessary to enlarge the fixing plate 31.

  Moreover, according to this forklift, in order to protect the brake pipe 19 from the tightening force of the wound string 41, the brake pipe 19 is increased by increasing the thickness of the brake pipe 19 itself or by wrapping the brake pipe 19 with a protective material. There is no need to increase its rigidity. In this forklift, the brake pipe 19 having a conventional structure can be used, so that the manufacturing cost of the brake pipe 19 can be prevented from rising, and the degree of freedom of attachment of the brake pipe 19 is not lowered around the undercarriage of the driving wheel 2 of the forklift.

(Example 2)
As shown in FIG. 5, the forklift according to the second embodiment has a bracket 23 that is a plate-like body provided on the axle support component 13 as a protection means. The bracket 23 is bent so as to surround the mounting portion 20 and the surrounding brake pipe 19. Plate members 233 for reinforcing the bracket 23 and fixing it to the axle support part 13 are attached to both ends of the bent bracket 23.

  In the bracket 23, each side extending in parallel with the axle 11 at both ends of the bracket 23 is a support portion 231. Both ends of the bracket 23 extend in directions in which the respective support portions 231 are separated from the axis O of the axle 11. Each support portion 231 has a convex portion 232 that bulges away from the axis O at one end on the fixed plate 31 side and the other end side on the axle housing 15 side. Other configurations are the same as those of the first embodiment, and the same components are denoted by the same reference numerals, and detailed description of the configurations is omitted.

  In the forklift according to the second embodiment configured as described above, the two support portions 231 support the string 41 wound around the attachment portion 20 and the surrounding brake pipes 19, so that the attachment portion 20 and the surrounding brakes are supported. It is possible to prevent the string 41 from being directly wound around the pipe 19. Further, since the wound string 41 is held in the convex portions 232 at both ends of the support portion 211, the string 41 is supported even when the string 41 moves due to a tightening force or the like generated on the wound string 41. It can prevent coming off from the part 231. For this reason, it is possible to prevent the string 41 from being directly wound around the attachment portion 20 and the surrounding brake pipe 19 with higher reliability. Other functions and effects are the same as those of the first embodiment.

  In the above, the present invention has been described with reference to the first and second embodiments. However, the present invention is not limited to the first and second embodiments, and can be appropriately modified and applied without departing from the spirit of the present invention. Needless to say.

  For example, in the first and second embodiments, the suspension of the drive wheel 2 has been described as an example, but it is naturally possible to provide a protection unit around the suspension of the steering wheel 3. In this case, the knuckle that displaces the steering wheel 3 in the left-right direction by the operation of the steering wheel 6 by the operator corresponds to the axle support component.

  Further, for example, the invention can be applied to an industrial vehicle such as a forklift provided with a disc brake instead of the drum brake 17. In addition to the string 41, the flexible long object includes a chain, a wire, a resin fixing band, an adhesive tape, and the like.

  The present invention is applicable to industrial vehicles that employ a hydraulic brake device as a braking device.

1 ... Body (machine frame)
11 ... Axle 13 ... Axle support component 31 ... Non-rotating part (fixed plate)
2, 3 ... wheels (2 ... driving wheels, 3 ... steering wheels)
32 ... Rotating part (drum)
33 ... Brake part 19 ... Brake pipe 20 ... Mounting part 41 ... Long object (string)
21, 23 ... Protection means (21 ... boss, 23 ... bracket)
211, 231 ... support portion 232 ... convex portion 13 ... axle housing

Claims (5)

An axle support part connected to the vehicle body and supporting the axle, a non-rotating part provided non-rotatably on the axle support part, and provided at one end of the axle, with wheels fixed to the non-rotating part together with the axle In an industrial vehicle provided with a rotating portion that rotates relative to the rotating portion, a braking portion that is provided in the non-rotating portion and brakes the rotating portion, and a brake pipe that is attached to the non-rotating portion and operates the braking portion by hydraulic pressure ,
The brake pipe has an attachment part attached to the non-rotating part,
The axle support component or the non-rotating portion is positioned in the vicinity of the mounting portion, and is a protection that prevents a flexible long object from being wound around the mounting portion and the brake pipe around the mounting portion. Means are provided,
The protection means has a support part that separates the long object from the axis of the axle, and the distance between the support part and the axis is longer than the distance between the mounting part and the axis. Industrial vehicles.   The industrial vehicle according to claim 1, wherein the protection means includes two support portions sandwiching the attachment portion.   The industrial vehicle according to claim 1, wherein the support portion is a protruding body that protrudes from the non-rotating portion side toward the axle support component side.   The industrial vehicle according to claim 1 or 2, wherein the protection means is a plate-like body provided on the axle support component and having a side extending parallel to the axle as the support portion.   The industrial vehicle according to claim 4, wherein the support portion has a convex portion that bulges away from the shaft center at one end on the non-rotating portion side and the other end on the axle support component side.

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