JPH0571501U - Anti-vibration body such as agricultural tractor - Google Patents

Abstract

(57) [Summary] [Purpose] Conventionally, when a tractor travels on a rough road, it vibrates violently up and down, and when a vertical load is generated, the gap provided in the cushion rubber becomes 0, There was a metallic noise that caused a direct collision between the airframe bracket and the dish-shaped plate. In addition, the support bases for the safety frame and the floor frame were separately configured. The present invention solves such a problem. [Structure] In a structure in which a pair of upper and lower cushion rubbers 2 and 3 are supported by a body bracket 4 with a support frame 1 sandwiched therebetween, one cushion rubber 3 is fixed to a preload regulation collar 5 and a gap is formed by a dish-shaped plate body 6. He was held while holding C1 and C2. Further, a floor frame 11 to which a safety frame 12 can be attached and detached is fixed to the rear end of the support frame 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vibration isolation mechanism such as a cabin of an agricultural tractor or a safety frame.

[0002]

[Prior Art]

 Conventionally, the technology related to a vibration isolator such as an agricultural tractor has been known. For example, it is as in the technique described in JP-A-58-68529.

[0003]

[Problems to be solved by the device]

 However, in the prior art, when the tractor violently vibrates up and down when traveling on a bad road and a vertical load is generated, the clearance provided in the cushion rubber becomes 0, and the fuselage bracket There was a metallic sound such that the plate and the plate plate directly collided with each other. In the past, the supporting bases for the safety frame and the floor frame were separately configured. Therefore, even if the vibration of the floor frame is vibration-proof, the safety frame is not. The present invention solves such a problem.

[0004]

[Means for Solving the Problems]

 The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described. That is, in a structure in which a pair of upper and lower cushion rubbers 2 and 3 are supported by the body bracket 4 with the support frame 1 interposed therebetween, one cushion rubber 3 is fixed to the preload regulation collar 5 and the cushion rubbers 2 and 3 are fixed between the cushion rubbers 2 and 3. The plate-like plate body 6 arranged in the above is held while maintaining the gaps C1 and C2. In addition, a supporting frame 1 is mounted in a floating state on the rear of a machine bracket 4 fixed to a machine such as an agricultural tractor via a cushion rubber 3, and a safety frame 12 can be attached to and detached from the rear end of the support frame 1. The frame 11 is fixed.

[0005]

[Operation] Next, the operation of the present invention will be described. In the present invention, a vibration isolation mechanism is disposed between the body frame 4 protruding from the rear axle housing 18 and the support frame 1. In the case of the cabin specification, the support frame 1 is directly fixed to the floor frame 11 to form a cabin C on the floor frame 11. In the case of the canopy specification, the safety frame base 10 is interposed between the support frame 1 and the floor frame 11, and the base of the safety frame 12 is inserted and fixed to the safety frame base 10. A canopy 13 is fixed above the safety frame 12. The anti-vibration mechanism is composed of a cushion rubber 2 without a preload regulation collar and a cushion rubber 3 with a preload regulation collar, and a dish-shaped plate body 6 is interposed therebetween. As a result, the gaps C1 and C2 of the cushion rubber 3 with the preload regulation collar can be maintained for a long time, and the vibration absorbing power can be improved.

[0006]

【Example】

 Next, examples will be described. 1 is a side view showing a state in which a cabin C is fixedly installed on a floor frame 11 in an agricultural tractor, etc., FIG. 2 is a side view showing a state in which a safety frame 12 is placed on the floor frame 11, and FIG. FIG. 4 is an enlarged side view showing a state in which the frame 1 is extended and fixed to the floor frame 11. FIG. 4 shows a safety frame base 10 attached to the support frame 1, and the safety frame base 10 and the floor frame 11 are fixed. Of the safety frame base 10 and the safety frame base 10 inserted into the safety frame base 10. FIG. 5 is a plan cross-sectional view showing the insertion state of the safety frame base 10 and the safety frame 12, and FIG. FIG. 7 is a side sectional view showing the arrangement of the supporting frame 1, the cushion rubbers 2 and 3 and the body bracket 4 according to the present invention, and FIG. 7 is a drawing showing another embodiment.

Next, a description will be given with reference to FIG. The cabin C is covered around a seat such as a tractor. The cabin C is supported in a floating manner by a cushion gum 2 and 3 with a body component such as a mission case, and since the seat 15 is supported by the cabin C, the operator is comfortable with little vibration. It is possible to work in the state. Further, the present invention relates to a mechanism for supporting the cabin C against the body bracket 4 in a vibration-proof manner.

In FIG. 2, instead of the cabin C, a safety frame 12 is arranged around the seat 15 to ensure safety when an agricultural tractor or the like falls. A canopy 13 is attached to the upper end of the safety frame 12 to avoid strong sunlight and rain. The safety frame 12 has two left and right frames arranged between the fenders 14. Even in the case where the safety frame 12 is additionally provided, the seat 15 is disposed on the floor frame 11, and the floor frame 11 is supported by the vibration isolation mechanism of the present invention.

Next, a description will be given with reference to FIG. A rear axle housing 18 (shown in FIG. 4) projects laterally from a transmission case that constitutes a tractor or the like, and a body bracket 4 is fixedly mounted on the upper surface of the rear axle housing 18. A hydraulic case 17 is erected on the upper surface of the mission case. However, the position for fixing the body bracket 4 is not limited, and it can be anywhere on the body side of the tractor. A floor frame 11 supported by cushion rubbers 2 and 3 is arranged above the body bracket 4 in the front-rear direction. A floor panel is arranged on the floor frame 11, a seat 15 is placed on the floor panel, and vibrations are not transmitted while the operator is sitting on the seat 15. In FIG. 3, the L-shaped support frame 1 is extended from the rear to the top, the floor frame 11 is fixed to the upper end of the extension of the support frame 1, and the cabin C is supported on the floor frame 11. ing.

Next, a description will be given with reference to FIG. FIG. 4 is an enlarged side sectional view of the case where the safety frame 12 is supported on the support frame 1 as shown in FIG. 2 instead of the cabin C. The body bracket 4 is fixedly mounted on the rear axle housing 18, and the support frame 1 is floatingly supported on the body bracket 4 via cushion rubbers 2 and 3. A safety frame base 10 is fixed to the rear end of the support frame 1. The safety frame base 10 is formed in a rectangular tube shape as shown in FIG. 5, and the base portion of a safety frame 12 of the same rectangular tube shape is fitted inside the safety frame base 10 formed in the rectangular tube. And is fixed by a fixing bolt 20 from below.

Further, the floor frame 11 is fixed to a portion where the safety frame base 10 extends upward, and the safety frame base 10 constitutes an intermediate fixing member between the support frame 1 and the floor frame 11. When the cabin C is attached as shown in FIG. 1, the support frame 1 is bent upward in an L shape, and the support frame 1 and the floor frame 11 are directly fixed to each other. On the contrary, when the safety frame 12 is attached, the safety frame base 10 is attached to the rear end of the support frame 1 and the base of the safety frame 12 is fitted to the safety frame base 10. There is. Further, the upper part of the safety frame base 10 is connected to the floor frame 11.

Next, referring to FIG. 6, the relationship between the cushion rubbers 2, 3, the support frame 1, the machine body bracket 4, the dish-shaped plate body 6, and the preload regulation collar 5 will be described. In FIG. 6, the cushion rubber 3 is first placed on the machine body bracket 4 protruding from the rear axle housing 18. A preload regulation collar 5 is integrated with the cushion rubber 3. That is, the cushion rubber 3 is the cushion rubber 3 with the preload regulation collar. Then, the dish-shaped plate 6 is placed on the cushion rubber 3 with the preload regulation collar, and the cushion rubber 3 with the preload regulation collar is formed in a donut shape. Immediately, the hole of the inner diameter of the plate-shaped plate body 6 has a diameter such that the preload regulation collar 5 can be loosely fitted therein. Next, the support frame 1 is placed on the plate-shaped plate body 6, and the cushion rubber 2 without preload regulation collar is further placed on the support frame 1. A fastening holding plate 8 is placed on the cushion rubber 2 without the preload regulation collar, and a holding bolt 7 fixes the space between the machine body bracket 4 and the fastening holding plate 8.

The plate-shaped plate body 6 has an inner peripheral bent edge portion 6a in the inner diameter portion thereof, and an opposite outer peripheral bent edge portion 6b in the outer peripheral portion. In this way, the inner peripheral bent edge 6a and the reverse outer peripheral bent edge 6b are formed in the plate-shaped plate body 6, so that the gaps C1 and C2 can be continuously maintained in the cushion rubber 3 with the preload regulation collar. As a result, the cushion rubber 3 with the preload regulation collar is crushed by the weights of the clearances C1 and C2 and the safety frame 12, and no metallic noise is generated. A margin gap H is formed between the outer peripheral end of the dish-shaped plate body 6 and the machine body bracket 4, and the support frame 1 can freely move up and down by the margin gap H. When the support frame 1 moves up and down, the upward rotation stopper of the support frame 1 is performed by abutting the engaging end portion 8a of the lower end of the fastening holding plate 8 and the upper surface of the support frame 1. ing. The lower limit stopper of the support frame 1 regulates when the lower end of the plate-shaped plate 6 contacts the upper surface of the machine bracket 4 and the clearance H disappears.

FIG. 7 shows a method of using the anti-vibration mechanism in which the positions of the support frame 1 and the body bracket 4 are reversed. That is, the machine body bracket 4 is arranged between the cushion rubber 2 without the preload regulation collar and the cushion rubber 3 with the preload regulation collar so that the holding bolt 7 and the dish-shaped plate body 6 can move up and down. The configurations of the allowance gap H and the gaps C1 and C2 are the same as the other cases.

[0015]

[Effect of the device]

 Since the present invention is configured as described above, it has the following effects. That is, since it is configured as in claim 1, a vertical load is generated by vertical vibration when an agricultural tractor or the like travels on a bad road. In this case as well, the cushion rubber 3 with the preload regulation collar and the plate-shaped plate body are generated. Since there is a gap C1 and C2 formed between the cushion rubber 3 with the preload regulation collar, it is less likely that the cushion rubber 3 with the preload regulation collar is crushed, and the plate-like plate body 6 collides with the machine body bracket 4 to generate a metallic sound. There is less to do. Further, after the gaps C1 and C2 are eliminated, the spring constant of the cushion rubber 3 with preload regulation collar is rapidly increased, so that the strain is suppressed under a high load. Therefore, the shaking of the entire cabin C is reduced.

Since the support frame 1 is vibration-insulated by the cushion rubbers 2 and 3 and the safety frame 12 is supported by the support frame 1, the safety frame 12 is vibration-isolated. Even when the canopy 13 is attached to the safety frame 12, the vibration is reduced. Further, the member to which the safety frame 12 is attached can be configured by extending a part of the support frame 1 and the floor frame 11.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which a cabin C is fixedly installed on a floor frame 11 in an agricultural tractor or the like.

FIG. 2 is a side view showing a state in which a safety frame 12 is placed on a floor frame 11.

FIG. 3 shows a floor frame 11 by extending the support frame 1.
The expanded side view which shows the state fixed.

FIG. 4 is an enlarged side cross-sectional view of a shape in which a safety frame base 10 is attached to a support frame 1, the safety frame base 10 and a floor frame 11 are fixed, and the safety frame 12 is inserted into the safety frame base 10. Fig.

FIG. 5 is a plan sectional view showing an inserted state of the safety frame base 10 and the safety frame 12.

FIG. 6 is a support frame 1 and cushion rubber 2 of the present invention.
3 is a side sectional view showing the arrangement of the body 3 and the body bracket 4. FIG.

FIG. 7 is a diagram showing an example of another vibration isolation mechanism.

[Explanation of symbols]

 C Cabin C1, C2 Gap 1 Support frame 2 Cushion rubber without preload control collar 3 Cushion rubber with preload control collar 4 Machine bracket 5 Preload control collar 6 Plate plate 7 Holding bolt 8 Fastening and holding plate

Claims (2)

[Scope of utility model registration request] 1. A structure in which a pair of upper and lower cushion rubbers are supported by an airframe bracket with a support frame sandwiched therebetween, one cushion rubber is fixed to a preload regulation collar, and a plate-shaped plate body is disposed between the cushion rubbers. Gap C
An anti-vibration body such as an agricultural tractor that is held while holding 1 and C2. 2. A support frame is mounted in a floating state on the rear of a machine bracket fixed to a machine such as an agricultural tractor via cushion rubber, and a floor frame to which a safety frame can be attached / detached is fixed to the rear end of the support frame. Anti-vibration body such as agricultural tractor.