JPS6113398Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a transmission for use in small harvesters and transport vehicles that travel on rough terrain.

Conventional side clutch braking devices are installed on an intermediate shaft above the axle where the transmission torque is small.
It has been difficult to downsize the transmission, as it is usually designed to withstand shocks such as when the brakes are applied.

The present invention addresses this problem by installing flanged mantle tubes that rotatably support both axles on both sides of the outer casing symmetrically, so that the transmission gear can only rotate freely between the axles on both sides. In the supported transmission, a clutch pawl provided on the inner end flange of the flanged sleeve made of a material with higher impact resistance than the constituent material of the outer casing, and a clutch pawl provided on the transmission gear opposite thereto. A sliding clutch having a clutch pawl at each end that selectively engages with either one of the clutch pawls is slidably spline-fitted onto the axle between the flanged sleeves, and the outer end of each flanged sleeve. A device is attached to the vehicle body to tightly fix the reinforcing tubes to the inner walls of each section, and to firmly hold and tighten the reinforcing tube attachment portion of the flanged sleeve tube between the U bolt circumscribing the reinforcing tube and the mounting frame on the vehicle body side. It is characterized by:

The figure shows an embodiment of the present invention, in which the flanged sleeve is made by welding a steel flange 2 to the base end of a thin-walled steel sleeve 1, and the flanged sleeves 1 and 2 are made of cast iron. A reinforcing tube is attached symmetrically to both sides of the outer casing 3 by connecting and fixing the flange 2 to the outer casing 3 with studs 4 and nuts 5, and is press-fitted and fixed into the outer end portion of each mantle 1. An axle 8 is attached to a flat bearing (button) 7 that is press-fitted into the inside of the bearing 6 and the inside of the flange 2, respectively.
is rotatably supported. 9 is a retaining ring attached to the axle 8 so as to engage with the inner periphery of the flange 2 on the outer casing side;
Reference numeral 10 indicates an oil seal press-fitted into the outer end of the sleeve 1, and a retaining ring 9 prevents the axle from being pulled out laterally.

Reference numeral 11 denotes a transmission gear support shaft rotatably supported between the axles 8, 8 on the same axis, and a collar 12 held between the axles 8, 8 on the transmission gear support shaft 11.
Transmission gear 13 is attached via. That is, the collar 12 is fitted into the female spline (or internal gear) 14 concentrically drilled in the transmission gear 13, and the retaining rings 15 that sandwich the collar are attached to both sides of the central part on the female spline 14 side. Transmission gear 1 for
At the same time, the spline teeth on both sides of the collar form a clutch pawl 14a. The transmission gear 13 is a gear 16 that meshes with the transmission gear 13.
The upper input shaft 18 is connected to the upper input shaft 18 via the intermediate shaft 17 carved with
Can be interlocked and connected.

Reference numeral 19 denotes a sliding clutch spline-fitted to both axles 8 between the transmission gear 13 and the flange 2, and the sliding clutch 19 has a clutch pawl 1.
A clutch pawl 19a that engages with the sliding clutch 4a and a clutch pawl 19b that engages with the clutch pawl 2b that is cut into the fitting portion 2a of the flange 2 into the mounting hole on the outer casing side are cut at both ends. The tip of a shift arm 20 whose base end is pivotably supported on the outer casing 3 side engages with the annular groove 19c recessed in the intermediate outer periphery so as to slide the sliding clutch 19. . 21
is a helical spring compressed between the sliding clutch 19 and the retaining ring 9 and fitted to the axle 8;
is always activated.

In the figure, 2c is an oil hole drilled in the flange 2, 22 is a mounting frame on the vehicle body side that holds and tightens the outer end of the cannula 1 in cooperation with a U bolt 23 and a nut 24, respectively.
Reference numeral 5 indicates a mounting bolt for mounting the upper end of the outer casing 3 to the vehicle body.

The present invention has the above-mentioned structure, in which the outer ends of the sleeves 1 and 1 on both sides are fixedly supported by the mounting frame 22 on the vehicle body side by U bolts 23, and the upper part of the outer casing 3 is supported by the vehicle body by bolts 25. When the vehicle is traveling straight, the clutch pawls 19a of the sliding clutches 19 on both sides are engaged with the clutch pawls 14a of the gear 13 due to the elasticity of the spring 21, so that the axles 1, 1 on both sides are connected via the sliding clutches. When directly connected to the gear 13 to drive both wheels synchronously and to turn the vehicle body, the sliding clutch 19 on the turning side is slid sideways by the shift arm 20, and the clutch pawl is connected to the clutch on the flange 2. Claw 2
By engaging gear b as shown, the gear 1
3. The sliding clutch 19 is disengaged to cut off power supply to the axle on the turning side, stop the rotation of the axle, and turn using the other driving wheel.

During this direction change, a large impact is applied to the flange 2 that engages the sliding clutch 19, but this impact is partially applied to the sleeve 1 and the press-fitted portion of the reinforcing tube 6 at its outer end. This is directly transmitted to the vehicle body through the frictional force between the U-bolt 23 and the mounting frame 22, which are strongly held and tightened. For this reason, the impact force transmitted to the outer casing 3 through the tightening portion by the bolts 4 and nuts 5 is reduced accordingly, and there is no problem even if the outer casing is made of thin casting, and the casing 1 has high impact resistance. The wall thickness can also be made thinner,
Moreover, there is no fear that the clutch pawl 2b of the flange 2, which has high impact resistance, will be damaged.

In the illustrated embodiment, the outer end plain bearing 7 of the axle 8 is attached to the inner wall of the reinforcing tube 6 in order to prevent an increase in the outer diameter of the sleeve tube and to prevent deformation of the plain bearing.

According to the present invention, the outer end of a flanged sleeve tube with high impact resistance is reinforced with a reinforcing tube closely fixed to the inside thereof, and the reinforcing tube attachment portion of the flanged sleeve tube is attached to a mounting frame on the vehicle body side. By strongly holding and tightening the grip, part of the impact generated when the sliding clutch engages with the clutch pawl on the flanged sleeve side is directly transmitted to the vehicle body using the frictional force generated in the holding and tightening portion. Therefore, the brake device of the side clutch can be configured as a dog clutch that can rotate around the interlining of the crawler, and this can be installed coaxially with the axle, making it possible to make the transmission small and compact. The flanged sleeve is made of pipe reinforced with a reinforcing tube, which has the effect of reducing manufacturing man-hours.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view of the lower part of a transmission equipped with the device of the present invention, FIG. 2 is a cross-sectional view taken from FIG. 1, and FIG. 3 is a side view of the transmission. 1... Mantle, 2... Flange, 3... Outer casing, 6
...Reinforcement tube, 7...Flat bearing, 8...Axle, 11...
...Transmission gear support shaft, 12...Collar, 13...Transmission gear, 14...Female spline, 18...Input shaft,
19...Sliding clutch, 22...Mounting frame on the vehicle body side, 23...U bolt, 25...Mounting bolt to the vehicle body.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A flanged mantle that rotatably supports both axles is installed symmetrically on both sides of the outer casing, and a transmission gear is rotatably supported between the axles on both sides. In the supported transmission, a clutch pawl provided on the inner end flange of the flanged sleeve made of a material with higher impact resistance than the constituent material of the outer casing, and a clutch pawl provided on the transmission gear opposite thereto. A sliding clutch having a clutch pawl at each end that selectively engages with either one of the clutch pawls is slidably spline-fitted onto the axle between the flanged sleeves, and the outer end of each flanged sleeve. A device is attached to the vehicle body to tightly fix the reinforcing tubes to the inner walls of each section, and to firmly hold and tighten the reinforcing tube attachment portion of the flanged sleeve tube between the U bolt circumscribing the reinforcing tube and the mounting frame on the vehicle body side. A side clutch brake device characterized by: (2) A braking device for a side clutch according to claim (1) of the utility model registration, in which a flat bearing on the outer end of the axle is attached to the inner wall of a reinforcing tube. (3) A braking device for a side clutch according to claim (1) or (2) of the utility model registration, in which the flanged sleeve tube is formed by welding a steel flange to a steel tube.