JPH0620717Y2 - Suspension arm of tracked vehicle - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a suspension arm of a tracked vehicle such as a tank or an armored combat vehicle that requires high mobility.

(Prior Art) A suspension arm of a conventional tracked vehicle will be described with reference to FIGS. 5 to 8. (A) is a tracked vehicle, (a) is a vehicle body skin of the tracked vehicle (A), b) arm part of suspension arm, (c) arm shaft part of suspension arm, (d) wheel shaft part of suspension arm, (e) outer roller bearing, (f) inner roller bearing, (g) suspension. Case, (h) inner taper bearing, (i) outer taper bearing, (j) hub, (k) shear pin, (l)
Is an angle detector, (l ') is a detector holder, (m) is an outer cap for a shaft, (n) is an inner cap for a shaft,
(o) is a rock nut, (p) is a road wheel, (q) is a track, (s) is an oil seal, (t) is a suspension stopper, (u) is a case fixture, (v) is a swing link, ( w) is a link pin, (x)
Is the cylinder rod, (y) is the bearing retainer, (z) is the bearing retainer fixture, and the road wheel (p) rolls on the upper surface of the track (q), and the tracked vehicle (A) runs. At this time, the arm part (b) of the suspension arm swings around the arm shaft part (c) according to the unevenness of the road surface. The arm part of this suspension arm (b)
The swing motion of is transmitted to the swing link (v) integrated with the arm shaft (c) through the arm shaft (c), and is converted into the reciprocating motion of the cylinder rod (x). It is absorbed and damped by a hydraulic cylinder (not shown), an accumulator, etc.

(Problems to be Solved by the Invention) In the suspension arm of the conventional tracked vehicle shown in FIGS. 5 to 8, the arm shaft portion (c) of the suspension arm is replaced by the arm portion.
Since it is necessary to firmly fix it to (b), the end of the arm shaft (c) is shrink-fitted to the arm (b) (after the hole of the arm (b) is heated by a heating furnace and expanded). ， Arm shaft part (c)
Insert the end of the arm into the hole of the arm (b), return to room temperature, and shrink fit the end of the arm shaft (c) to the arm (b)),
Next, the end of the arm shaft portion (c) is welded to the arm portion (b). In addition, in order to have a torque capacity, the shear pin should be placed between the end of the arm shaft (c) and the arm (b).
Type in (k). That is, the connection strength between the arm shaft portion (c) and the arm portion (b) was obtained by the interference of the shrinkage fitting, the welding strength, and the shear strength of the shear pin (k). On the other hand, the connection strength between the arm part (b) and the wheel shaft part (d) is also not driven by the shear pin (k),
It was obtained by the interference of the shrinkage fitting and the welding strength.
However, when the arm shaft (c) and the wheel shaft (d) are shrink-fitted to the arm (b), if the shrink-fitted part of the arm (b) is thin, the shrinkage strength of the shrink fit is obtained. Therefore, the shrink-fitting part of the arm part (b) is made thick (first, second, third
(Refer to (E) and (F) in the figure) and the fact that the arm part (b) is solidly manufactured by forging, so the arm part (b) was a considerable weight. There are at least 8 suspension arms with one armed vehicle (b), and at least 14 suspension arms for each tracked vehicle. The weight increase of one suspension arm is 8 to 14 times. In a tracked vehicle traveling at high speed on rough terrain, the unsprung weight (weight not supported by suspension springs) is increased, which deteriorates the ground contact of the wheel (road holding) on rough terrain, etc., and reduces maneuverability. There was a problem. Also, tanks and armored combat vehicles use high-quality materials,
It is not preferable to make the shrink-fitted portion of the arm portion (b) thick or to make the arm portion (b) solid because it increases the material cost.

The present invention is proposed in view of the above problems, and the object of the present invention is to achieve weight reduction and cost reduction. The ground contact of the wheel can be improved and the maneuverability can be improved. Further, another object of the present invention is to provide a suspension arm of a tracked vehicle that can improve the reliability of the connection strength of the arm shaft portion and the wheel shaft portion to the arm portion.

(Means for Solving the Problem) In order to achieve the above object, the suspension arm of the tracked vehicle of the present invention is formed by casting the arm shaft portion of the suspension arm, the arm portion and the wheel shaft portion integrally and hollow. And the L between the arm shaft part and the arm part.
The meat on the outer side of the L-shaped portion and the meat on the outer side of the L-shaped portion between the arm portion and the wheel shaft portion are dropped into a substantially crescent shape, and are placed in the L-shaped portion between the arm shaft portion and the arm portion. A hole is formed to connect the inside of the arm with the inside of the arm, and the width of the arm is W ₀ , the diameter of the hole is W ₂ , the side of the wheel shaft portion of the arm is the same. Letting W ₁ be the distance to the punched hole plus the diameter W ₂ of the same punched hole, W ₁ / W ₀ = 1/2 or less and W ₂ / W ₀ = ¼ or less Value, and the tip of the blind plug is inserted into the arm-side opening of the wheel shaft, and the disc provided in the middle of the blind plug is welded and fixed to the arm.

(Operation) The suspension arm of the tracked vehicle of the present invention is configured as described above, and the following operation is achieved. That is, in the case where the entire suspension arm is cast integrally and hollow without lowering the strength, W ₁ / W ₀ = 1/2 or less and W ₂ / W ₀ = 1
The optimum value is / 4 or less. In addition, the L-shaped outside meat between the arm shaft portion and the arm portion and the L-shaped outside meat portion between the arm portion and the wheel shaft portion can be dropped in a substantially crescent shape, and the above value can be obtained. The weight of the suspension arm and the cost reduction can be achieved in combination with the point.

In addition, since the unsprung weight (weight not supported by the suspension spring) is reduced, the grounding property of the wheel (road holding) on rough terrain, etc. is improved and maneuverability is improved.

Further, since the entire suspension arm is manufactured integrally and hollow without lowering the strength, the conventional suspension arm which has the connection strength depending on the interference strength of the shrink fit and the welding strength. By comparison, the reliability of the connection strength of the arm shaft portion and the wheel shaft portion to the arm portion is improved.

(Embodiment) Next, a suspension arm of a tracked vehicle of the present invention will be described with reference to an embodiment shown in FIGS. 1 to 4. (1) is a vehicle body outer plate of the tracked vehicle, and (2) is a suspension. Arm, (2a) is the arm shaft portion of the suspension arm (2), (2b) is the arm portion of the suspension arm (2), (2
c) is the wheel shaft of the suspension arm (2), (3) is the outer roller bearing, (4) is the inner roller bearing, (5) is the suspension case, (6) is the blind plug, and (6a) is the blind plug (6 ) Tip part, (6b) disk part of the blind plug (6), (6c) hitting part of the blind plug (6) (abutting part hitting the suspension stopper (18)), (7 ) Is an inner taper bearing, (8) is an outer taper bearing, (9) is a lock nut, (10)
Is a hub, (11) is a road wheel, (12) is a track, (13) is an oil seal, (14) is an angle detector, (14 ') is a detector holder, (15) is an outer cap for a shaft, (16) ) Is an inner cap for a shaft, (17) is a case fixing tool, (18) is a suspension stopper, (19) is a bearing retainer, and (20) is a bearing retainer retainer. The suspension arm (2) has an arm shaft portion (2a). ) And arm
(2b) and the wheel shaft portion (2c) are formed integrally and hollow by casting, and the arm shaft portion (2a) and the arm portion (2b)
The meat (E) on the outer side of the L-shaped portion between and and the meat (F) on the outer side of the L-shaped portion between the arm portion (2b) and the wheel shaft portion (2c) are dropped into a substantially crescent shape, and the arm shaft portion ( A lightening hole (core hole) (H) that connects the inside of the arm shaft portion (2a) and the inside of the arm portion (2b) in the L-shaped portion between the arm portion (2a) and the arm portion (2b).
The width of the arm portion (2b) is W ₀ , the diameter (core width) of the lightening hole (H) is W ₂ , and the lightening hole (2c) side surface of the arm portion (2b) (2c) is provided. Holes (H) in the distance to (H)
Let W ₁ be the distance (core position) added with the diameter W ₂ of
W ₁ / W ₀ = 1/2 or less and W ₂ / W
₀ = 1/4 or less, insert the tip (6a) of the blind plug (6) into the opening on the arm (2b) side of the wheel shaft (2c), and insert the middle of the blind plug (6). The disc (6b) provided on the
Welded and fixed to b).

Next, the value of W ₁ / W ₀ = 1/2 or less is set, and W ₂ / W ₀ = 1
Explaining the reason why the value is / 4 or less, the suspension arm (2)
The suspension arm is designed to reduce the weight and cost by forming the whole body integrally and hollow by casting.
From the viewpoint of the strength of (2), it is better to keep W ₀ constant and to reduce W ₂ , but from the viewpoint of casting, it is better to increase W ₂ . On the other hand, W ₂ requires the following. That is, when the diameter of W ₂ is small, the core of the W ₂ portion is broken by the buoyancy (external force) of the molten metal, so W ₂ needs a diameter that does not break the core of the W ₂ portion. In the core of W ₂ part,
In order to improve the degassing of the core of the W ₀ part, a gas vent pipe is used. In this gas vent pipe, W ₂ /
A diameter determined by W ₀ is required. W _{0 in the} W ₂ section
A diameter that enables sand removal of the core of the part is required. Considering these points, when casting the entire suspension seam (2) integrally and hollow without lowering the strength, W ₁ / W
₀ = 1/2 the following _values, it is optimal to W _{2 /} W 0 = 1/4 or less of the value. Moreover, the meat (E) and the arm portion outside the L-shaped portion between the arm shaft portion (2a) and the arm portion (2b)
Meat outside L-shaped part between (2b) and wheel shaft part (2c)
There is no problem even if (F) is dropped in a substantially crescent shape, and the weight reduction and cost reduction of the suspension arm (2) are achieved in combination with the above value.

In addition, the unsprung weight (weight not supported by the suspension spring) is reduced, so that the ground contact of the wheel (road holding) on rough terrain is improved and maneuverability is improved.

Moreover, since the entire suspension arm (2) is manufactured integrally and hollow without lowering the strength, the connection strength is obtained depending on the tightening margin strength and the welding strength of the shrink fitting. Compared with the suspension arm, the reliability of the connection strength of the arm shaft (2a) and the wheel shaft (2c) to the arm (2b) is improved.

(Effect of the Invention) The suspension arm of the tracked vehicle of the present invention is configured as described above, and the following effects can be achieved. That is, when casting the entire suspended seam integrally and hollow without lowering the strength, W ₁ / W ₀ = 1/2 or less and W ₂ / W ₀ = 1
The optimum value is / 4 or less. Moreover, the meat outside the L-shaped portion between the arm shaft portion and the arm portion and the meat outside the L-shaped portion between the arm shaft portion and the wheel shaft portion may be dropped into a substantially crescent shape, and the above value is obtained. The weight of the suspension arm can be reduced and the cost can be reduced due to the point.

In addition, the unsprung weight (weight not supported by the suspension spring) can be reduced, which improves the grounding performance of the wheel (road holding) on uneven terrain, etc., and improves maneuverability.

In addition, since the entire suspension arm can be manufactured integrally and hollow without lowering the strength, compared with the conventional suspension arm that obtains the connecting strength depending on the interference strength and welding strength of shrink fitting. And, there is an effect that the reliability of the connection strength of the arm shaft portion and the wheel shaft portion to the arm portion can be improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional front view showing an embodiment of a suspension arm of a tracked vehicle according to the present invention, FIG. 2 is a side view of the suspension arm seen from the direction of arrow II in FIG. 1, and FIG. 3 is FIG. View III-I
A vertical sectional front view of the suspension arm along the line II, FIG. 4 is a perspective view of a blind plug, FIG. 5 is a side view of a conventional tracked vehicle, and FIG.
7 is a vertical sectional front view of the suspension arm taken along line VI-VI in the figure
6 is a side view of the suspension arm viewed from the direction of arrow VII in FIG. 6, and FIG. 8 is an end view of the wheel shaft portion viewed from the direction of arrow VIII of FIG. (1) …… Body outer skin of tracked vehicle, (2) …… Suspension arm, (2a)
…… Arm shaft part, (2b) …… Arm part, (2c) …… Wheel shaft part, (3) …… Outer roller bearing, (4) ……
Inner roller bearing, (5) …… Suspension case, (6) …… Blind plug,
(6a) ... tip of blind plug (6), (6b) ... disk of blind plug (6),
(6c) …… Blank stopper (6) hitting part, (7) …… Inner taper bearing, (8) …… Outer taper bearing, (9) …… Lock nut,
(10) …… Hub, (11) …… Road wheel, (12) …… Crawler track, (13) …… Oil seal, (14) …… Angle detector, (1
4 ') …… Detector holder, (15) …… Outer cap for shaft, (16) …… Inner cap for shaft, (17) ……
Case fixture, (18) …… suspension stopper, (19) …… bearing retainer, (20) …… bearing retainer fixture.

Claims (1)

[Scope of utility model registration request] 1. An arm shaft portion of a suspension arm, an arm portion, and a wheel shaft portion are integrally and hollowly formed by casting or the like, and meat outside the L-shaped portion between the arm shaft portion and the arm portion and The meat on the outside of the L-shaped portion between the arm portion and the wheel shaft portion is dropped into a substantially crescent shape, and is placed inside the L-shaped portion between the arm shaft portion and the arm portion and inside the arm shaft portion. A lightening hole communicating with the inside of the arm portion is provided, and the width of the arm portion is W ₀ , the diameter of the lightening hole is W ₂ , and the distance from the side surface of the arm portion on the wheel shaft portion side to the lightening hole is the same. Diameter W _{2 of the} same hole
Let W ₁ be the distance added to W ₁ / W ₀ = 1/2 or less and W ₂ / W ₀ = 1/4 or less. A suspension arm for a tracked vehicle, characterized in that the front end of the blind plug is inserted into the arm, and a disc provided in the middle part of the blind plug is welded and fixed to the arm part.