CN205824182U - A kind of agricultural machinery sealer with assembled - Google Patents

Abstract

This utility model relates to a kind of agricultural machinery sealer with assembled.This device includes bearing block, bearing, oil sealing, rotary shaft.Described oil sealing is installed on the rotary shaft, and described bearing is installed on the rotary shaft, and described bearing block coordinates with bearing, oil sealing, is machined with trapezoidal or rectangular thread in the rotary shaft installing oil sealing end side.Prominent effect of the present utility model is: rotary shaft screw thread when rotated and water relative motion, and water is constantly screwed out in rotary course by screw thread, thus stops water to enter bearing side, forms movable sealing.When axle is static, oil sealing can stop the entrance of water completely.No matter this device can effectively prevent the entrance of water and mud in axle duty or resting state.

Description

A combined sealing device for agricultural machinery

technical field

The utility model relates to a combined sealing device for agricultural machinery.

Background technique

Since all kinds of agricultural machinery work in the medium with dust and muddy water, the bearing wear and corrosion will be accelerated due to the entry of water and muddy sand into the bearing, which will cause bearing damage and cause the machine to fail to operate. The current sealing structures are: contact oil seal, simple in structure but poor in sealing effect, and damage to oil seal, shaft and bearing due to abrasion caused by mud and sand; non-contact seal + oil seal, more complex in structure and mud and sand will still invade the oil seal and cause early Failure; the combined oil seal (that is, the oil seal itself has a rotary motion pair) is expensive and the mud and sand will still invade the bearing after wear; other seals are not used in agricultural machinery due to structural and cost reasons.

Contents of the invention

The purpose of the utility model is to design a combined sealing device for agricultural machinery with simple structure, practicality and low cost in view of the problems existing in the background technology.

The technical scheme of the utility model is: a combined sealing device for agricultural machinery, including a bearing seat, a bearing, an oil seal, and a rotating shaft; the bearing is installed on the rotating shaft, and the oil seal is installed on the rotating on the shaft; the bearing seat is closely matched with the bearing and the oil seal, and an external thread is processed on the rotating shaft outside the oil seal.

The external thread processed on the rotating shaft of the utility model is a trapezoidal thread or a rectangular thread.

The oil seal described in the utility model is two pieces, and two pieces are installed side by side.

The inner hole of the oil seal described in the utility model is matched with the rotating shaft, and the outer circle is matched with the bearing seat.

The sealing device described in the utility model is applied on the cutter roller shaft of the paddy field rotary tiller.

The outstanding effect of the utility model is: when the rotating shaft rotates, the screw thread and the water move relatively, and the screw thread continuously spins out the water during the rotation process, preventing the water from entering the side of the bearing from the surface, forming a dynamic seal. When the shaft is stationary, the oil seal completely prevents the ingress of water. The device can effectively prevent the entry of water and mud no matter in the working state of the shaft or in the static state.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1, bearing seat; 2, bearing; 3, oil seal; 4, rotating shaft; 5, external thread.

detailed description

As shown in Figure 1, the utility model is applied on the cutter roller shaft of the paddy field rotary tiller. The device includes a bearing seat, a bearing, an oil seal, and a rotating shaft. The oil seal is installed on the rotating shaft, the bearing is installed on the rotating shaft, the bearing seat cooperates with the bearing and the oil seal, and trapezoidal or rectangular threads are processed on the rotating shaft on the side where the oil seal is installed. The outstanding effect of the utility model is: when the rotating shaft rotates, the screw thread and the water move relatively, and the screw thread continuously unscrews the water during the rotation process, thereby preventing the water from entering the side of the bearing and forming a dynamic seal. When the shaft is stationary, the oil seal completely prevents the ingress of water. The device can effectively prevent the entry of water and mud no matter in the working state of the shaft or in the static state.

The implementation described in the utility model is a description of the preferred embodiment of the utility model, not to limit the scope and concept of the utility model, and various modifications and improvements under the premise of not departing from the design concept of the utility model should fall into the scope of the utility model. Protection scope of the present utility model.

Claims (5)

1. A combined sealing device for agricultural machinery, characterized in that: it includes a bearing seat, a bearing, an oil seal, and a rotating shaft; the bearing is mounted on the rotating shaft, and the oil seal is mounted on the rotating shaft close to the side of the bearing , the bearing seat is closely matched with the bearing and the oil seal as a whole, and an external thread is processed on the rotating shaft outside the oil seal. 2. The combined sealing device for agricultural machinery according to claim 1, wherein the external thread processed on the rotating shaft is a trapezoidal thread or a rectangular thread. 3. The combined sealing device for agricultural machinery according to claim 1, characterized in that: the oil seal has two pieces, and the two pieces are installed side by side. 4. The combined sealing device for agricultural machinery according to claim 1 or 3, characterized in that: the inner hole of the oil seal is matched with the rotating shaft, and the outer circle is matched with the bearing seat. 5. The combined sealing device for agricultural machinery according to claim 1, 2 or 3, characterized in that the sealing device is applied on the cutter roller shaft of a paddy field rotary tiller.