JPH04113208U - Leaf spring for suspension - Google Patents

Abstract

(57) [Summary] [Purpose] The main feature of this invention is to standardize parts when using narrow leaf springs without using spacers that cause various problems. . [Structure] At least in the vicinity of the narrow leaf spring 1b, which is closest to the U-shaped portion 9a of the U-bolt 9, through which the U-bolt 9 is inserted;
A portion 12 having the same plate width as the wide plate spring 1a is formed. As a result, when using the narrow leaf spring 1b, if the U-bolt 9 used in the case of the wide leaf spring 1a is fitted, the part of the leaf width functions as a regulating part in the same way as the wide leaf spring 1a. It turns out. That is, when using the wide leaf spring 1a, the U bolt 9, nut 10, pad 7, and axle 8 that are attached can be used as they are.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This idea was developed for suspensions used in vehicles such as trucks. Regarding leaf springs for springs.

0002

[Conventional technology]

Vehicles such as trucks use suspension systems that use leaf springs, as shown in Figure 2. version is used.

0003 Specifically, a plurality of leaf springs 1 having different lengths are stacked to form a leaf spring layer 2, One side of this leaf spring layer 2 is fixed to the frame 4 using only the shackle pin 3, and the other side is fixed to the frame 4 using only the shackle pin 3. The side is fixed to the frame 4 with a shackle pin 5 and a shackle link 6. stop Then, place a pad in the center of the leaf spring 1 (the longest leaf) on the frame side of the leaf spring layer 2. 7, and axle 8 in the center of leaf spring 1 (the shortest length) on the opposite side. The three members are placed along the width direction of the leaf spring layer portion 2 from the frame side toward the axle 8. The previously fitted U-bolt 9 and the nuts 10 screwed into each end of this U-bolt 9 , 10 is used. By the way, in order to increase the weight that can be loaded on trucks, the vehicle weight should be reduced as much as possible. There is a high demand for relief.

0004 In other words, the weight of trucks has increased due to improved specifications and performance. There is a tendency to However, the loading capacity of a truck is determined by subtracting the vehicle weight from the loading capacity. The remaining part is heavy enough to carry luggage. In other words, the loading frame is fixed. Therefore, the lighter the vehicle weight, the more cargo it can carry. This requirement also applies to suspensions using leaf springs.

[0005] Considering the weight reduction of this leaf spring, we can reduce the weight while maintaining the spring constant and strength. For this purpose, the board width can be reduced and the board thickness slightly increased. In other words, narrow leaf springs are used. Bye. However, there are cases where the plate width of the plate spring cannot be reduced. For example, this applies for export purposes. I guess.

[0006] In other words, for export, rigidity is more required than weight. Specifically, The suspension has lateral rigidity and lateral strength that can withstand driving on extremely rough roads. degree is required. Therefore, in the case of export, as shown in Figure 3 (a) and (b), In many cases, a wide plate spring 1a is used.

[0007] Therefore, different suspension leaf springs are now used even in the same car model. However, even though the leaf springs are different, the mounting parts (U bolts 9, nuts 10, etc.) and Axle 8 is not a different part. Therefore, conventionally, in order to standardize these parts, the This spacer structure was used for narrow suspensions.

[0008] That is, the spacer 11 forms the plate member into a channel shape as shown in FIG. 4(b). It has a folded configuration. When using a narrow leaf spring 1b, 4(a), the U-bolt 9 is interposed between the U-bolt 9 and the leaf spring layer 2, and the wide When using the leaf spring 1a, the spacer 11 was not used. If you do this , U-bolt 9, nut 10, pad 7, and axle 8 use narrow leaf springs 1b. This means that it can be used in common even when using a wide leaf spring 1a.

[0009]

[Problem that the idea aims to solve]

However, the structure using this spacer 11 increases the weight considerably. That is, since spring steel is used for the leaf spring 1a (1b), the spacer 11 Strength is required to match this, and the weight increases accordingly.

0010 Moreover, since the spacer 11 needs to be processed separately, the cost will only increase. Or the number of parts increases. Moreover, due to the sliding contact of the spacer 11, the suspension is considerably There is also a problem that the tension stroke decreases, and improvements are desired.

[0011] This idea was created with a focus on these circumstances, and its purpose is When using a narrow leaf spring without using a spacer, which causes various problems, Our goal is to provide a leaf spring for suspensions that allows for common parts. Ru.

0012

[Means to solve the problem]

In order to achieve the above object, the suspension leaf spring of this invention has a U-bolt. At least in the vicinity of the narrow leaf spring closest to the U-shaped part, where the U-bolt is inserted, A part with the same leaf width as a wide leaf spring was formed.

[0013]

[Effect]

According to the suspension leaf spring of this invention, when using a narrow leaf spring, If you fit the U bolt used for wide leaf springs, you can use the same width as the wide leaf spring. The portion functions as a regulating portion to prevent rattling of the leaf spring layer. In other words, when using a wide leaf spring, the U bolts, nuts, pads, etc. The axle can be used as is (commonality).

[0014] Moreover, since only a portion of the leaf spring is made larger, the increase in weight is suppressed and the cost is reduced. It is also inexpensive. Furthermore, the suspension stroke may be reduced. do not have.

[0015]

【Example】

This invention will be explained below based on an example shown in FIGS. 1(a) and (b). . In addition, in the drawings, the same parts as those described in the "Prior Art" section above are shown. are given the same reference numerals and their explanations are omitted, and in this section, different parts (main parts of the invention) are I will explain about it.

[0016] This embodiment is the most suitable when configuring a suspension using a narrow leaf spring 1b. A part of the upper leaf spring 1b (the leaf spring on the side closer to the U-shaped part 9a of the U-bolt 9) The plate width was increased and this part was used to replace the conventional spacer.

[0017] In detail, the part surrounded by the two U bolts 9, 9 of the leaf spring 1b located at the top. It extends to have the same width as the wide leaf spring 1a. In other words, this extension The portion 12 is formed when using the wide leaf spring 1a shown in FIGS. 3(a) and 3(b). Similarly, it is regulated by U bolts 9, 9 and nuts 10, 10.

[0018] Therefore, when constructing a suspension using narrow leaf springs 1b, the length A plurality of leaf springs 1b with different values are stacked to form a leaf spring layer part 2, and this leaf spring layer part 2 Fix one side of the frame to the frame 4 with only the shackle pin 3, and the other side with the shackle pin. It is fixed to the frame 4 with the pin 5 and shackle link 6. And this leaf spring layer Layer the pad 7 in the center of the leaf spring 1b (longest plate length) on the frame side of the part 2, and The axle 8 is placed in the center of the opposite leaf spring 1b (the one with the shortest length), and this Insert the three pieces from the frame side along the width direction of the leaf spring layer 2 toward the axle 8. Tighten the U-bolt 9 and the nuts 10, 10 screwed into each end of the U-bolt 9. All you have to do is tie it.

[0019] In other words, when using a narrow leaf spring 1b, the extension is the same as the width of the wide leaf spring 1a. The long part 12 serves as a restriction part for the U-bolts 9, 9 used for wide leaf springs. This function prevents the leaf spring layer portion 2 from wobbling or the like.

[0020] Therefore, when using a wide leaf spring 1a, as shown in FIGS. 3(a) and 3(b), U-bolt 9, nut 10, and pad 7 used for the wide leaf spring 1a , the axle 8 can be used as is (commonization).

[0021] Moreover, since only a part of the narrow leaf spring 1b is enlarged, an increase in weight is suppressed. be done. Also, the cost is low. Moreover, compared to when using conventional spacers, There is no reduction in suspension stroke.

[0022] In addition, in one embodiment, the plate width of the portion of the plate spring 1b surrounded by the two U bolts 9, 9 is the same as the plate width of the wide plate spring 1a, but is not limited to this, for example, the U bolt 9 Only the portion through which the plate is inserted may have the same plate width as the wide plate spring 1a.

[0023]

[Effect of the idea]

As explained above, according to this invention, there is no need to use spacers that cause various problems. , it is possible to standardize parts when using a narrow leaf spring.

[Brief explanation of drawings]

FIG. 1(a) is a sectional view showing the main parts of a suspension using a leaf spring according to an embodiment of the invention. (b) is Figure 1
FIG.

FIG. 2 is a front view showing the entire suspension of a truck using leaf springs.

FIG. 3(a) is a sectional view showing a main part of a suspension using a wide leaf spring. (b) is a plan view of (a) of FIG.

[Fig. 4] (a) is a sectional view showing the main part of a suspension using a narrow leaf spring that uses a conventional spacer to standardize parts; (b) shows the spacer. Perspective view.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1... Leaf spring layer part, 1a... Wide leaf spring, 1b... Narrow leaf spring, 7... Pad, 8... Axle, 9... U bolt, 9a
...U-shaped part, 10...nut, 12...extension part.

Claims (1)

[Scope of utility model registration request] [Claim 1] A leaf spring layer portion in which narrow leaf springs are overlapped is provided, a pad is stacked on the side of the leaf spring layer portion where the spring plate length is longer, and the spring plate length of the leaf spring layer portion is shorter. Stack the axle on the side, fit the U bolt corresponding to the wide leaf spring from the bad side toward the axle along the width direction of the leaf spring, screw the nut into the end of this U bolt,
In a suspension leaf spring in which an axle is fastened to the leaf spring layer, a portion of the leaf spring closest to the U-shaped portion of the U-bolt, at least in the vicinity through which the U-bolt is inserted, is the same as a wide leaf spring. A leaf spring for suspension, characterized in that a portion having a leaf width is formed.