JPH04132874U - Agricultural tractor body frame mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] The present invention connects the vehicle body frame and the transmission case without vibration. [Structure] In the body frame of an agricultural tractor that connects the engine 2 mounting part at the front of the machine body and the transmission case 3 at the rear, the left and right axle cases 6, 6 parts provided on the rear axle case 4 on the side of the transmission case 3, and the vehicle body Vibration isolating elastic bodies 9, 9 are fitted between the rear connecting members 7, 7 of the frame 5, and the upper and lower surfaces 5-1 of the vehicle body frame 5 having a rectangular cross section are fitted on the transmission 3 side.
, 5-2, and the inner surface 5-3 are provided with upper and lower elastic bodies 12, 1 for vibration isolation, respectively.
3 was connected while interposing it.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention relates to a body frame mounting structure for an agricultural tractor.

0002

[Conventional technology]

Conventionally, the engine mounting part, transmission case and rear axle case The body frame of an agricultural tractor that integrally connects the There are some that are fixed directly to the rear axle case or rear axle case using a bolt-fastening structure. Ru.

0003

[Problem that the idea aims to solve]

However, the body frame of the agricultural tractor mentioned above has a transmission case and Aircraft vibration is large because there is no elastic body interposed in the connection with the rear axle case. Due to the poor transmission, the driving comfort was poor for the driver.

0004 Also, since vibrations from the running wheels are repeatedly applied to the vehicle frame, The vehicle had problems such as cracks occurring in the body frame.

[0005]

[Means to solve the problem]

This invention combines the engine mounting area at the front of the aircraft and the transmission case at the rear. In the body frame of the agricultural tractor to be connected, the transmission case side The left and right axle case parts installed in the rear axle case and the rear connection part of the car body frame. A vibration-proof elastic body is fitted between the materials, and the transmission side is square. Vibration isolating upper and lower elastic bodies are installed on the upper and lower surfaces of the body frame, which has a cross-section, and on the inner surface. The present invention proposes a body frame mounting structure for agricultural tractors that is characterized by being connected to each other. This is what we intend to offer.

[0006]

【Example】 An embodiment of the present invention will be explained based on the drawings. 1 is an agricultural tractor with a Equipped with engine 2, transmission case 3 and rear axle at the rear. The through case 4 is connected. 5 is the body frame at the front, which houses the engine 2. In addition to being connected, the transmission case 3 and rear axle case are connected at the rear. base 4 is connected.

[0007] The body frame 5 has a cross section at an intermediate position between the front and rear parts as shown in FIG. It is formed into a rectangle. In addition, the rear end of the vehicle body frame 5 is a rear axle cable. Annular rear connecting members 7, 7 are provided to support the left and right axle cases 6, 6 of the vehicle 4. It consists of

[0008] 8 is a fixing bolt that fixes the rear end of the vehicle body frame 5 and the annular rear connecting members 7, 7; G, 9 is an annular vibration-proofing member fitted between the annular connecting members 7, 7 and the axle cases 6, 6. It is an elastic body.

[0009] In addition, at the connection part 10 between the transmission case 3 side and the vehicle body frame 5, there is a 4, an upper elastic body 11 for vibration isolation and a lower elastic body 12 for vibration isolation are interposed.

0010 Then, the upper side 5-1 and the lower side 5-2 of the vehicle body frame 5 having a rectangular cross section, While the inner surface 5-3 is in contact with the upper vibration-isolating elastic body 11 and the lower vibration-isolating elastic body 12, Supported.

[0011] In addition, 13 is a rear connecting plate that integrally connects the left and right rear connecting members 7, 7, and 14 is a fixed This is a regular bolt. 15 is fixed to the left and right side walls 3-1 of the transmission case 3. 16 is a fixing bolt, and 17 is a rear wheel provided on the left and right sides.

0012 The embodiment of the present invention is constructed as described above, and the engine 2 is connected to the front part. A transmission case 3 and a rear axle case 4 are attached to a vehicle body frame 5. When connecting the rear connecting members 7, 7 to the axle case 6 of the rear axle case 4. , 6.

[0013] A vibration-proofing elastic body 9 is provided between the axle cases 6, 6 and the rear connecting members 7, 7. After connecting the rear connecting members 7, 7 to the vehicle body frame 5 to form a vibration-proof structure, It is connected with the bolt 8.

[0014] Next, when connecting the transmission case 3 and the vehicle body frame 5, In addition to fitting the vibration-proofing upper elastic body 11 into the concave portions on both sides of the transmission case 3, The entire transmission case 3 has a prevention structure while interposing the lower elastic body 12 for vibration isolation. It is connected in a shape.

[0015] Therefore, according to the above embodiment, the vehicle body frame whose cross section is formed in the shape of a rectangular pipe. When connecting the transmission case 3 to the frame 5, use the upper anti-vibration bullet. Since it is connected via the elastic body 11 and the lower elastic body 12, the Vibration and noise are not transmitted to sheet metal fittings such as the rear wheel fender. This reduces vibration and noise throughout the aircraft.

[0016] In addition, on the rear axle case side, reaction force due to sudden torque fluctuations in the drive system is reliably absorbed by the annular vibration isolating elastic bodies 9, 9, thereby preventing cracks in the vehicle body frame 5. It is possible to prevent deformation and deformation.

[0017] In addition, the transmission case 3, rear axle case 4 and vehicle frame The connection structure with 5 is constructed at low cost as a noise countermeasure, and the noise effect is fully demonstrated. It is something that will be done.

[0018] Moreover, it is possible to reduce the weight of the transmission case 3, and to reduce the weight of the vehicle body. System 5 eliminates the need to maintain accuracy of mounting holes during assembly, making hole machining and assembly easier. It is something.

[0019] 5 to 7 show other embodiments of the vehicle body frame mounting structure. , when connecting the transmission case 21 to the vehicle body frame 20 with a rectangular cross section. , a front cover 22 provided at the front of the transmission case 21, and a A connecting member 23 having a wide width and a shape is provided, and the connecting member 23 and the vehicle body frame are connected to each other. At the position where the elastic body 24 is wrapped around the outer circumference of the rubber band 20, fix it with an L-shaped fastener 25. ing. 26 is a fixing bolt. Also, delivery of transmission case 21 The axle case 27 side, which is integrally formed with the transmission case 21, is annular. They are connected via a vibration-proofing elastic body 28.

[0020] Therefore, in the above embodiment, the transmission case 21 and the vehicle body frame are The structure of the connecting member 23 connected to the vehicle body frame 20 is simple, and Since there is no connection member welded to the side, the welded part is not welded to the body frame 20. It is constructed with high strength and no cracks.

[0021] Further, FIG. 8 shows another embodiment, and shows a structure for preventing the axle from coming off.

[0022] 30 is an axle provided on both the left and right sides of the transmission case 31, and an axle gear is provided at the inner end. 32 is supported on the shaft. The axle 30 is supported by two ball bearings 33 and 34. While being held, a round ring 35 with a round cross section is fitted between the ball bearings 33 and 34. equipped. 36 is a concave groove provided on the outer periphery of the axle 30, which is designed to match the round ring 35 described above. It is shaped like a circular arc.

[0023] Therefore, since the concave groove 36 of the axle 30 is formed in an arc shape, Compared to a concave groove formed in a shape, the stress applied to the axle is not concentrated, and therefore the axle This increases the strength of In addition, since the shaft diameter can be made small, it is possible to This makes it possible to reduce the weight of the entire application case. Also, round ring 35 It can be made into a round cross section and can be fitted into the chamfered part of a ball bearing. This eliminates the need for washers.

[0024]

[Effect of the idea]

According to the present invention, a torque is applied to a vehicle body frame whose cross section is formed into a rectangular pipe shape. When connecting transmission cases, attach the upper elastic body and lower elastic body for vibration isolation. Since the connection is made through the Vibrations and noise throughout the aircraft are reduced because they are not transmitted to sheet metal fittings such as the fuselage. It's a little bit.

[0025] In addition, on the rear axle case side, reaction force due to sudden torque fluctuations in the drive system is reliably absorbed by the annular anti-vibration elastic body, preventing cracks and deformation of the vehicle frame. It is something that can be prevented.

[0026] In addition, the connection between the transmission case and rear axle case and the vehicle body frame is The connecting structure is constructed at low cost as a noise countermeasure, and the noise effect is fully demonstrated. It is something.

[0027] Moreover, the weight of the transmission case can be reduced, and the body frame of the same vehicle can be reduced in weight. The system eliminates the need to maintain the accuracy of mounting holes during assembly, making hole machining and assembly easier. It is.

[Brief explanation of drawings]

FIG. 1 is an overall side view of an agricultural tractor equipped with the present invention.

FIG. 2 is a side view of the main parts of the present invention.

FIG. 3 is a plan view of the same.

FIG. 4 is a sectional view taken along line AA in FIG. 2;

FIG. 5 is a side view showing another embodiment of the vehicle body frame mounting structure.

FIG. 6 is a plan view of the same.

FIG. 7 is a sectional view taken along line BB in FIG. 6;

FIG. 8 is a cross-sectional front view showing the axle mounting portion.

[Explanation of symbols]

2 engine 3 Transmission case 4 Rear axle case 5 Body frame 6 Left and right axle case 7 Rear connecting member 9 Elastic body for vibration isolation 5-1 Top side 5-2 Bottom side 5-3 Inner surface 12 Upper elastic body for vibration isolation 13 Lower elastic body for vibration isolation

Claims (1)

[Scope of utility model registration request] Claim 1: In a body frame of an agricultural tractor that connects an engine 2 mounting part at the front of the machine body and a transmission case 3 at the rear, the transmission case 3 is
Left and right axle cases 6 provided on the side rear axle case 4,
6 and the rear connecting members 7, 7 of the vehicle body frame 5, vibration isolating elastic bodies 9, 9 are fitted, and the transmission 3 side is fitted with the upper and lower surfaces 5 of the vehicle body frame 5 having a rectangular cross section. -1, 5-2, and an inner surface 5-3 are connected to each other while interposing upper and lower vibration-proof elastic bodies 12, 13, respectively.