JPH0731453U - Propeller shaft protector - Google Patents

Abstract

(57) [Summary] [Purpose] To protect the propeller shaft by assembling a member that has a simple structure and is easy to attach to the chassis frame. [Structure] A beam member is bent into a loop shape, and both ends of a protective member 12 intersecting with a gap 13 having a dimension L exceeding the outer diameter of the propeller shaft 2 are surrounded by a loop portion 14 around the propeller shaft 2. It is attached to the chassis frame 3 to prevent the propeller shaft 2 from falling off. After bending the beam material into a loop shape, the attachment portions 15a, 1 are attached to the tips of the leg portions 15, 16 extending from the loop portion 14 to the left and right.
6a is formed, and bolt holes 15b and 16b are formed in the mounting portions 15a and 16a. Further, even if the propeller shaft 2 surrounded by the loop-shaped portion 14 is damaged, the loop-shaped portion 14 serves as a buffer. Can receive the propeller shaft 2.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a propeller shaft protection device using a simple and easy-to-install member.

[0002]

[Prior art]

 If the propeller shaft or its joint is damaged, the detached propeller shaft may swing around or drag the ground. Therefore, in general, even if the propeller shaft is damaged, it is usual to attach a propeller shaft protector to the chassis frame so that the damaged propeller shaft can be held safely.

A propeller shaft protection device 1 shown in FIGS. 4 and 5 includes a protection member 4 at several locations on a chassis frame 3 having a pair of longitudinal frames 3 a and 3 b extending parallel to the propeller shaft 2 from the front side to the rear side of the vehicle. , 5 are attached as appropriate. As shown in FIG. 6, the protective members 4 and 5 are slightly different in structure, and one protective member 4 suspends a U-shaped hanger member 4b on a bridge member 4a bridged between a pair of left and right stringers 3a and 3b. On the other hand, the other protection member 5 has a U-shaped hanger member 5b suspended from a bracket 5a fixed to the lower surface of an auxiliary frame 6 bridged between a pair of left and right stringers 3a and 3b. There is a difference. However, these protective members 4 and 5 are common in that they protect the propeller shaft 2 although there are some differences in structure, and both of them are used for the chassis frame 3 and the auxiliary frame 6 for the bridge member 4a or the bracket. If the chassis 5a is attached, the propeller shaft 2 can be protected by bolting and fixing the hanger members 4b and 5b when the chassis frame 3 and the propeller shaft 2 are positioned.

[0004]

[Problems to be solved by the device]

 The conventional propeller shaft protection device 1 requires the bridge member 4a and the hanger member 4b in the case of the protection member 4 in order to attach the protection members 4 and 5 to the chassis frame 3, and the protection member 5 as well. In this case, the auxiliary frame 6 requires an integral bracket 5a and hanger member 5b. For the pair of stringers 3a and 3b, which are the girders, there are bridge members 4a and beams that straddle the girders. The presence of the auxiliary frame 6 is indispensable, and if the hanger members 4b and 5b are simply attached, fastening components such as bolts, nuts, and washers are all that is required, but the bridge member 4a and the auxiliary frame 6 are required. Alternatively, when the installation of the bridge 5a is included, there are problems that the number of mounting steps is large and the number of parts used is also large.

In addition to the above-mentioned propeller shaft protection devices, for example, as shown in Japanese Utility Model Application Laid-Open No. 58-104730 "Propeller shaft protection device", both ends of a U-shaped hanger member are coil springs. It is also known that a bridge member is buffer-supported by using. However, in this product, a coil spring must be prepared in addition to the hanger member and the bolts and nuts necessary for mounting the hanger member, and the whole structure is complicated by that much, and it was flipped up by the wheels during traveling. If mud adheres and accumulates in the gaps between the coil springs, the coil springs may not be able to expand and contract, and the original function may not be exhibited.

Furthermore, in Japanese Utility Model Laid-Open No. 62-54823 “Vehicle propeller shaft fall prevention device”, a belt-shaped plate member is bent into a U-shape on a bridge member bridged between a pair of longitudinal members of a chassis frame. A protective device for a propeller shaft is disclosed in which a protective member formed in this way can be easily attached. In this product, two brackets are welded and fixed to the beam member, and a fitting portion that locks the protective member in the plate width direction is formed on this bracket, and the U-shaped ends of the protective member are locked to the fitting portion. In this condition, the fixing bolt is used to fix it to the bracket. However, this propeller shaft protector is unavoidable as a bridge member because the space between the U-shaped ends of the U-shaped bent protection member is not equal to the space between the pair of stringers of the chassis frame. The bracket is welded and fixed.A pair of brackets are required to attach the protective member, and in order to prevent the protective member from swinging and maintain the mounting strength, the protective member is attached to the plate width. There is a problem that it is difficult to reduce the manufacturing cost because it requires a lot of manufacturing work such as forming a fitting portion that locks in the direction.

Therefore, an object of the present invention is to protect the propeller shaft by means of a member which has a very simple structure and can be easily attached to the chassis frame.

[0008]

[Means for Solving the Problems]

 According to the present invention, a chassis frame extending along a propeller shaft and a beam are bent into a loop shape, and are crossed with a gap having a size exceeding the outer diameter of the propeller shaft. A protective device for a propeller shaft, which is attached to both ends of the chassis frame while surrounding the shaft, and includes a protective member for protecting the propeller shaft. To achieve.

Further, in the present invention, the protection member is formed by bending a beam member made of a strip-shaped plate material into a loop shape, and forming bolt insertion holes in the mounting portions at both ends, thereby protecting the propeller shaft. By providing a device, or the protective member bends a beam made of a pipe material or a round bar into a loop shape and flattenes both ends to form a mounting portion, and a bolt insertion hole is formed in the mounting portion. The object is achieved by providing a protection device for a propeller shaft characterized by the above.

[0010]

[Action]

 Based on the above configuration, the beam material is bent into a loop shape, and both ends of the protection member that intersects with a gap larger than the outer diameter of the propeller shaft are attached to the chassis frame with the propeller shaft being surrounded by the loop portion. By attaching and protecting the propeller shaft, the structure is simple and easy to attach to the chassis frame.

[0011]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 is a perspective view showing an embodiment of a propeller shaft protection device of the present invention, and FIG. 2 is a top view of the protection member shown in FIG.

The propeller shaft protection device 11 shown in FIG. 1 uses a protection member 12 formed by bending a single beam material into a loop shape. The protection member 12 is formed by bending a beam member made of a strip-shaped plate material into a loop shape by intersecting with a gap 13 having a dimension L exceeding the outer diameter of the propeller shaft 2 and bending the loop member into a loop shape. Both ends can be attached to the chassis frame 3 in the closed state. The protective member 12 is formed by bending attachment portions 15a and 16a at the ends of the left leg portion 15 and the right leg portion 16 for screwing to the inner side walls of the pair of vertical frames 3a and 3b. Bolt holes 15b and 16b, through which tightening bolts are inserted, are formed in the mounting portions 15a and 16a.

When viewed from directly above, the loop-shaped portion 14 formed in the central portion of the protective member 12 has an outer portion of the propeller shaft 2 between the left leg portion 15 and the right leg portion 16 as shown in FIG. A gap 13 having a dimension L exceeding the diameter can be seen, and this gap 13 has an important meaning as an introduction opening for fitting the propeller shaft 2 into the loop-shaped portion 14. That is, when attaching the protection member 12 to the chassis frame 3, first, the gap 13 at the intersection of the left leg portion 15 and the right leg portion 16 is applied to the propeller shaft 2, and the protection member is arranged in the manner of a circle of wisdom. The propeller shaft 2 is penetrated into the loop-shaped portion 14 of 12. When the propeller shaft 2 penetrates the loop-shaped portion 14, the loop-shaped portion 14 is made orthogonal to the propeller shaft 2 and the mounting portions 15a and 16a formed at the ends of the left leg portion 15 and the right leg portion 16 are attached. Place it on the inner side walls of the stringers 3a and 3b of the chassis frame 3. Then, in this state, a bolt (not shown) is inserted into the bolt holes 15b and 16b and tightened to fix the protective member 12.

As described above, according to the propeller shaft protection device 11, the beam member is bent into a loop shape, and both ends of the protection member 12 intersected with each other with the gap 13 having a size exceeding the outer diameter of the propeller shaft 2 are provided. Since the propeller shaft 2 is surrounded by the loop-shaped portion 14 and attached to the chassis frame 3 to protect the propeller shaft 2, the beam frame can be bent into a loop shape almost as it is. A skeleton that can be attached to 3 is completed, and after that, attachment portions 15a and 16a are formed at the tips of the leg portions 15 and 16 that extend from the loop-shaped portion 14 to the left and right, and the bolt insertion holes 15b and 15b are inserted into the attachment portions 15a and 16a. Since it is only necessary to drill 16b, for example, a conventional protection member 4 or the like in which the bridge member 4a and hanger member 4b are combined Unlike, the structure itself is very simple. Further, since the protection member 12 can be attached only by attaching the attachment portions 15a and 16a at both ends to predetermined positions of the chassis frame 3 by bolting or the like, the work is very easy, and the loop-shaped portion 14 can be attached. Even if the surrounding propeller shaft 2 is cut off, the loop-shaped portion 14 receives the propeller shaft 2 in a relaxed manner, so that no shock is applied to the propeller shaft 2 and no special biasing means such as a coil spring is provided. Since it is unnecessary, it can be constructed with a minimum number of parts.

Further, since the protection member 12 is formed by bending a beam material made of a strip-shaped plate material into a loop shape and forming bolt holes 15b, 16b in the mounting portions 15a, 16a at both ends, the beam material made of the strip-shaped plate material is formed. The protection member can be easily formed only by performing a loop-shaped bending process and forming a bolt hole on the.

In the above embodiment, the beam material that is the raw material of the protective member is not limited to the strip-shaped plate material, and for example, like the protective member 22 shown in FIG. It can also be manufactured by bending. In this case as well, both ends of the protective member 22 intersecting with a gap larger than the outer diameter of the propeller shaft 2 may be flatly rolled to form a mounting portion 22a, and a bolt hole 22b may be formed in the mounting portion 22a. For this reason, if a beam made of pipe or round bar is used instead of strip-shaped plate, it is necessary to roll both ends flat after rolling to form the mounting part. Although it is sufficient to form bolt holes 22b in 22a and a rolling process is added, it is possible to reduce the manufacturing cost by using a pipe material or a round bar as a beam material.

[0017]

[Effect of device]

 As described above, according to the present invention, the beam member is bent into a loop shape, and both ends of the protection member, which are crossed with a gap larger than the outer diameter of the propeller shaft, are connected to each other by a loop-shaped portion. Since it is attached to the chassis frame in a state of surrounding it to protect the propeller shaft, by bending the beam material into a loop shape, a skeleton that can be almost attached to the chassis frame is completed. After that, it is only necessary to form a mounting part at the tip of the leg part that extends from the loop-shaped part to the left and right, and to drill a bolt insertion hole in this mounting part, so conventional protection combining a bridge member and a hanger member is required. Unlike the members, the structure itself is very simple, and the protection members can be attached by bolting the attachment parts at both ends to the chassis frame at predetermined positions. The work is very easy because it only needs to be attached, and even if the propeller shaft surrounded by the loop-shaped part is damaged, the loop-shaped part receives the propeller shaft as a buffer, and the propeller shaft is impacted. Since no special biasing means such as a coil spring is required, it is possible to achieve an excellent effect such as being able to be configured with a minimum number of parts.

In addition, since the protection member is formed by bending a beam material made of a strip-shaped plate material into a loop shape and forming bolt insertion holes at the attachment portions at both ends, the beam material made of the strip-shaped plate material is bent in a loop shape. The protective member can be easily formed simply by bending and drilling bolt holes. Alternatively, the protective member can be formed by bending a pipe or a beam made of a round bar into a loop and flattening both ends. Since it was rolled into a mounting part and a bolt hole was drilled in this mounting part, there was no problem in using a beam material made of a pipe or a round bar instead of a strip-shaped plate material. Both ends are flatly rolled to form a mounting part, and a bolt hole is only required to be drilled in this mounting part.While a rolling process is added, the manufacturing cost can be reduced by using a pipe material or a round bar for the beam material. There are some effects.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a propeller shaft protection device of the present invention.

FIG. 2 is a top view of the protection member shown in FIG.

FIG. 3 is a perspective view showing another embodiment of the propeller shaft protection device of the present invention.

FIG. 4 is a side view showing an example of a vehicle to which a conventional propeller shaft protection device is applied.

5 is a perspective view of the propeller shaft protector shown in FIG. 4. FIG.

6 is a partially enlarged exploded perspective view of the propeller shaft protection device shown in FIG. 4. FIG.

[Explanation of symbols]

 2 Propeller shaft 3 Chassis frame 11 Propeller shaft protector 12,22 Protective member 13 Gap 14 Loop-shaped part 15 Left leg part 16 Right leg part 15a, 16a, 22a Mounting part 15b, 16b, 22b Bolt hole

Claims (3)

[Scope of utility model registration request] 1. A chassis frame extending along a propeller shaft and a beam member are bent into a loop shape, and are intersected with each other with a gap having a size exceeding an outer diameter of the propeller shaft. The loop-shaped portion forms the propeller shaft. A protective member for protecting the propeller shaft, the both ends of which are attached to the chassis frame in a state of enclosing the propeller shaft. 2. The propeller shaft protection device according to claim 1, wherein the protection member is formed by bending a beam material made of a strip-shaped plate material into a loop shape, and forming bolt insertion holes in the mounting portions at both ends. Characteristic propeller shaft protection device. 3. The propeller shaft protection device according to claim 1, wherein the protection member is formed by bending a beam material made of a pipe material or a round bar into a loop shape, and flattening both ends to form a mounting portion. A propeller shaft protector characterized in that a bolt insertion hole is formed in the mounting portion.