CN210978152U - Agricultural machinery gear box - Google Patents

Abstract

The utility model relates to an agricultural machinery gear box, including gear box body, end cover and connecting screw, be equipped with a plurality of screws on the terminal surface of port, and be equipped with two screws that set up near respectively on one diagonal angle among them of port, be equipped with the through-hole with screw one-to-one, the screw outer end is equipped with first ladder, the through-hole is equipped with the second ladder near port one end, be equipped with the elastic washer between first ladder and the second ladder, the thickness of elastic washer is greater than the distance between first ladder and second ladder; a boss is arranged on the end face of the port, the boss is arranged close to the inner wall of the port, the thickness of the boss is smaller than that of the side wall of the port, and a groove for the boss to insert and is matched with the boss in size is formed in one side, close to the port, of the end cover; and reinforcing ribs are arranged on the outer wall of the screw hole in the port. With this design, the end cap can be prevented from loosening.

Description

Agricultural machinery gear box

Technical Field

The utility model relates to a gear box technical field, concretely relates to agricultural machinery gear box.

Background

In order to protect the transmission gears, a gear box is often provided outside the transmission gears. Among the prior art, the end cover of gear box and the gear box body directly adopt the screw to fix, after using a period, because gear drive can produce great vibrations, also can produce more vibrations in addition agricultural machinery work, thereby the connecting screw is not hard up easily and leads to the end cover of gear box not hard up, influences normal use.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a can prevent not hard up agricultural machinery gear box of end cover.

In order to achieve the above purpose, the utility model adopts the technical scheme that: an agricultural machinery gear box which characterized in that: the gearbox comprises a gearbox body, an end cover and a connecting screw, wherein the gearbox body is provided with a port through which a gear transmission shaft passes, the end cover covers the port, and the end cover and the port are fixedly connected through the connecting screw; the end face of the port is provided with a plurality of screw holes, two screw holes which are arranged closely are arranged on one diagonal of the port respectively, the end cover is provided with through holes which correspond to the screw holes one by one, the outer end of each screw hole is provided with a first step with a step surface facing outwards, one end of each through hole, close to the port, is provided with a second step with a step surface facing the port, an elastic gasket is arranged between the first step and the second step, the thickness of the elastic gasket is larger than the distance between the first step and the second step, and the connecting screw penetrates through the second step, the elastic gasket and the first step from the outer side of the end cover in sequence and is fixedly connected with the screw holes in a threaded manner; a boss is arranged on the end face of the port, the boss is arranged close to the inner wall of the port, the thickness of the boss is smaller than that of the side wall of the port, and a groove for the boss to insert and is matched with the boss in size is formed in one side, close to the port, of the end cover; and reinforcing ribs are arranged on the outer wall of the screw hole in the port.

Furthermore, the number of the bosses is four, and the bosses are respectively arranged on four edges of the port. The bosses are arranged on the four edges of the port respectively, so that relative sliding between the end cover and the port can be prevented, and the end cover is prevented from loosening.

Furthermore, the free end part of the boss is provided with a guide inclined plane. This may facilitate end cap assembly.

Furthermore, the elastic gasket is an O-shaped ring.

Compared with the prior art, the utility model has the advantages of it is following: through the arrangement of the bosses and the grooves with the matched sizes, when the gear box vibrates, the bosses and the grooves which are matched with each other can disperse more interaction force between the port and the end cover, so that the radial force borne by the screw is reduced, and the screw is not easy to loosen after being used for a long time, thereby preventing the end cover from loosening to influence normal use; through the arrangement of the elastic washer, a buffering and damping effect can be formed between the end cover and the port, and the end cover can be prevented from loosening due to vibration; through set up the strengthening rib at the screw outer wall, can increase the intensity of screw wall, avoid long-time the use to cause the screw to warp and reduce the fastening effect to the screw.

Drawings

FIG. 1 is a schematic diagram of an explosion structure of a gearbox according to a preferred embodiment of the present invention;

fig. 2 is a schematic structural view of an end cap according to a preferred embodiment of the present invention.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In the description of the present invention, it should be noted that, for the terms of orientation, such as "central", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the terms of orientation and positional relationship indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of protection of the present invention.

As shown in fig. 1 to 2, which are schematic structural views of a preferred embodiment of the present invention, as shown in the drawings, the agricultural gearbox includes a gearbox body 1, an end cover 2 and a connecting screw 3, a port 4 for a gear transmission shaft to pass through is provided on the gearbox body 1, the end cover 2 covers the port 4, and the end cover 2 and the port 4 are connected and fixed by the connecting screw 3; a plurality of screw holes 41 are formed in the end face of the port 4, two screw holes 41 which are arranged in a close manner are respectively formed in one diagonal of the port 4, through holes 21 which correspond to the screw holes 41 one by one are formed in the end cover 2, a first step 42 with a step face facing outwards is arranged at the outer end of each screw hole 41, a second step 22 with a step face facing the port 4 is arranged at one end, close to the port 4, of each through hole 21, an elastic gasket 5 is arranged between each first step 42 and the corresponding second step 22, the thickness of each elastic gasket 5 is larger than the distance between each first step 42 and the corresponding second step 22, and the connecting screw 3 sequentially penetrates through the second step 22, the elastic gaskets 5 and the first steps 42 from the outer side of the end cover 2 and is fixedly connected with the screw holes 41 in; a boss 43 is arranged on the end face of the port 4, the boss 43 is arranged close to the inner wall of the port 4, the thickness of the boss 43 is smaller than that of the side wall of the port 4, and a groove 23 for the boss 43 to insert and fit with the boss 43 is arranged on one side, close to the port 4, of the end cover 2; and reinforcing ribs 44 are arranged on the outer wall of the screw hole 41 in the port 4.

By arranging the boss 43 and the groove 23 which are matched in size, when the gear box vibrates, the boss 43 and the groove 23 which are matched with each other can disperse more interaction force between the port 4 and the end cover 2, so that the radial force borne by the screw 3 is reduced, and the screw 3 is not easy to loosen after long-time use, thereby preventing the end cover 2 from loosening to influence normal use; by arranging the elastic washer 5, a buffering and damping effect can be formed between the end cover 2 and the port 4, and the end cover 2 can be prevented from loosening due to vibration; the reinforcing ribs 44 are arranged on the outer wall of the screw hole 41, so that the strength of the side wall of the screw hole 41 can be increased, and the phenomenon that the screw hole 41 is deformed to reduce the fastening effect on the screw 3 due to long-time use is avoided; the end cap 2 can be firmly connected with the port 4 by fixing two abutting screw holes 41 on one diagonal of the port 4.

In this embodiment, the bosses 43 are four and are respectively disposed on four sides of the port 4. Bosses 43 are provided on four sides of the port 4, respectively, to prevent relative sliding between the end cap 2 and the port 4, thereby preventing the end cap 2 from being loosened.

In this embodiment, the free end of the boss 43 is provided with a guiding inclined surface 45. This facilitates rapid alignment during assembly of the end cap 2.

In this embodiment, the elastic washer 5 is an O-ring.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (4)

1. An agricultural machinery gear box which characterized in that: the gearbox comprises a gearbox body, an end cover and a connecting screw, wherein the gearbox body is provided with a port through which a gear transmission shaft passes, the end cover covers the port, and the end cover and the port are fixedly connected through the connecting screw; the end face of the port is provided with a plurality of screw holes, two screw holes which are arranged closely are arranged on one diagonal of the port respectively, the end cover is provided with through holes which correspond to the screw holes one by one, the outer end of each screw hole is provided with a first step with a step surface facing outwards, one end of each through hole, close to the port, is provided with a second step with a step surface facing the port, an elastic gasket is arranged between the first step and the second step, the thickness of the elastic gasket is larger than the distance between the first step and the second step, and the connecting screw penetrates through the second step, the elastic gasket and the first step from the outer side of the end cover in sequence and is fixedly connected with the screw holes in a threaded manner; a boss is arranged on the end face of the port, the boss is arranged close to the inner wall of the port, the thickness of the boss is smaller than that of the side wall of the port, and a groove for the boss to insert and is matched with the boss in size is formed in one side, close to the port, of the end cover; and reinforcing ribs are arranged on the outer wall of the screw hole in the port.

2. The agricultural machine gearbox of claim 1, wherein: the number of the bosses is four, and the bosses are respectively arranged on four edges of the port.

3. The agricultural machine gearbox of claim 2, wherein: the free end part of the boss is provided with a guide inclined plane.

4. The agricultural machine gearbox of claim 1, wherein: the elastic gasket is an O-shaped ring.

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