Rough filtration structure of gearbox of backhoe loader

Abstract

The utility model discloses a rough filtration structure of a gearbox of a backhoe loader. The rough filtration structure comprises a box body, a rough filter, a bolt, a spring washer, a paper pad, an O-shaped ring and an oil suction pipe, the rough filter comprises an outer cover plate, a magnet, a filter screen and an inner end cover, all the parts are firmly bonded through high-strength glue, the rough filter is locked at the bottom in the box body through four sets of bolts and spring washers, and a paper pad is assembled between the rough filter and the box body to ensure sealing; a fixing plate is welded to the upper end of the oil suction pipe and locked on the box body through two sets of bolts and elastic pads, a baffle is welded to the lower end of the oil suction pipe, and O-shaped rings are assembled between the upper end and the lower end of the oil suction pipe and the rough filter so as to ensure sealing. The filter screen is simple and compact in structure, good in filtering effect and convenient to maintain, and solves the problems that a circular plane filter screen in the prior art is poor in filtering effect, the surface of the filter screen is easily blocked by foreign matters and is difficult to maintain and clean, so that a pressure reducing valve and an electromagnetic valve are blocked, and a gearbox has no gear.

Description

TECHNICAL FIELD

[0001] The utility model relates to excavator gearbox structure technical field, concretely relates to excavator gearbox rough filter structure. BACKGROUND

[0002] The excavator can be used for both shoveling and loading, and has the advantages of multifunction, so it is popular among customers in the fields of agriculture, forestry, municipal administration and small area operation. The demand for such products in the domestic and foreign markets is also increasing steadily. The existing excavator gearbox generally adopts electro-hydraulic control shifting, and the forward and reverse movement of the whole machine is controlled by multiple electromagnetic valves. Therefore, the cleanliness in the hydraulic system of the gearbox is crucial to the normal operation of the gearbox. At present, the rough filter of the excavator gearbox generally adopts a circular flat filter screen, which is arranged at the upper end of the oil suction pipe. However, this structure has the following defects: first, the filtering effect is poor; second, the filter screen is easily blocked by foreign matters and is difficult to maintain and clean, which may cause the pressure reducing valve and the electromagnetic valve to be stuck, resulting in the gearbox without gears. SUMMARY

[0003] The utility model discloses a kind of excavator gearbox rough filter structures of simple structure, good filtering effect, easy maintenance, solve the poor filtering effect of prior art circular flat filter screen, filter screen is easily blocked by foreign matters and is difficult to maintain and clean, resulting in the pressure reducing valve and the electromagnetic valve to be stuck, resulting in the gearbox without gears Problem.

[0004] To achieve the above object, the utility model excavator gearbox rough filter structure includes box 1, rough filter 2, bolt 3, elastic pad 4, paper pad 5, O-shaped ring 6 and oil suction pipe 7;The rough filter 2 includes outer cover plate 2.1, magnet 2.2, filter screen 2.3 and inner end cap 2.4, each part is firmly bonded by high-strength glue, the rough filter 2 is locked in the bottom of box 1 by four sets of bolts 3, elastic pad 4, paper pad 5 is assembled between rough filter 2 and box 1 to ensure sealing;The upper end of the oil suction pipe 7 is welded with fixed plate 6.2, and is locked on the box 1 by two sets of bolts 3 and elastic pad 4, the lower end of the oil suction pipe 7 is welded with baffle 6.1, and O-shaped ring 6 is assembled between the upper end and the lower end of the oil suction pipe 7 and the rough filter 2 to ensure sealing.

[0005] The above-mentioned excavator gearbox rough filter structure has the following technical features and advantages by increasing a cylindrical rough filter core at the lower end of the oil suction pipe:

[0006] 1, large filtering area, good filtering effect, effectively solve the problem of poor filtering effect in prior art and valve sticking;

[0007] 2, easy to assemble and disassemble, easy to maintain, the rough filter can be disassembled and cleaned of surface foreign matters during gearbox maintenance, thereby prolonging the service life of the rough filter. BRIEF DESCRIPTION OF DRAWINGS

[0008] Figure 1 is a schematic diagram of the excavator loader gearbox rough filter structure of the utility model.

[0009] Figure 2 is Figure 1 the structure schematic diagram of the middle A direction.

[0010] Figure 3 is Figure 1 the structure schematic diagram of the middle B direction.

[0011] The reference signs: box 1, rough filter 2, outer cover plate 2.1, magnet 2.2, filter screen 2.3, inner end cover 2.4, bolt 3, elastic pad 4, paper pad 5, O-ring 6, baffle 6.1 and fixed plate 6.2, oil suction pipe 7. DETAILED DESCRIPTION

[0012] The excavator loader gearbox rough filter structure of the utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0013] Figures 1-3 As shown, the excavator loader gearbox rough filter structure of the utility model comprises a box 1, a rough filter 2, a bolt 3, an elastic pad 4, a paper pad 5, an O-ring 6 and an oil suction pipe 7; the rough filter 2 comprises an outer cover plate 2.1, a magnet 2.2, a filter screen 2.3 and an inner end cover 2.4, and each part is firmly bonded by high-strength glue, the rough filter 2 is locked at the bottom in the box 1 by four sets of bolts 3 and elastic pads 4, and a paper pad 5 is assembled between the rough filter 2 and the box 1 to ensure sealing; the upper end of the oil suction pipe 7 is welded with a fixed plate 6.2, which is locked on the box 1 by two sets of bolts 3 and elastic pads 4, and the lower end of the oil suction pipe 7 is welded with a baffle 6.1, and the upper end and the lower end of the oil suction pipe 7 are both assembled with an O-ring 6 between the rough filter 2 to ensure sealing.

[0014] The excavator loader gearbox rough filter structure of the utility model increases the filtering area by adding a cylindrical rough filter core at the lower end of the oil suction pipe, facilitates disassembly and cleaning of foreign matter on the surface of the rough filter device during maintenance, ensures the cleanliness of the oil in the hydraulic system inside the gearbox, thereby effectively solving the problems of poor filtering effect, easy blockage of the filter screen by foreign matter and difficult maintenance and cleaning, causing the check valve and the electromagnetic valve to be stuck, resulting in the problem of no block in the gearbox, and greatly improving the product quality.

Claims

1. A skid steer loader transmission rough filtration arrangement, characterized by: It include box (1), coarse filter (2), bolt (3), elastic pad (4), paper pad (5), O ring (6) and oil suction pipe (7), the coarse filter (2) includes outer cover plate (2.1), magnet (2.2), filter screen (2.3) and inner end cover (2.4), each part is firmly bonded by high-strength glue, the coarse filter (2) is locked in the bottom of box (1) by four sets of bolts (3), elastic pad (4), paper pad (5) is assembled between the coarse filter (2) and the box (1) to ensure sealing, the upper end of the oil suction pipe (7) is welded with a fixed plate (6.2), which is locked on the box (1) by two sets of bolts (3), elastic pad (4), the lower end of the oil suction pipe (7) is welded with a baffle (6.1), the upper end and the lower end of the oil suction pipe (7) are both assembled with O ring (6) between the coarse filter (2) to ensure sealing.

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