Grain moisture detection device

Abstract

A grain moisture detection device relates to the technical field of grain detection. The special bearing of the right transmission shaft is located on the side close to the roller, a special bearing seat is provided with a seat hole for installing a bearing outer ring, a notch is formed in the right side of the seat hole of the special bearing seat, the special bearing comprises a standard bearing inner ring, a roller and a special outer ring, and the special outer ring extends out of the notch and then is provided with a V-shaped arm. The other end of the V-shaped arm abuts against the limiting block A. The bending part of the V-shaped arm is pasted with a strain gauge. The device has the beneficial effects that the position for detecting deformation is placed on the specially-made outer ring of the specially-made bearing, deformation during grain particle rolling is directly detected, the problem that the detection precision is not enough due to the fact that a gap between the bearing outer ring and the bearing seat cannot be eliminated in the original detection process is solved, meanwhile, the deformation is amplified through the V-shaped arm of the specially-made outer ring, and the detection precision is improved. And the detection precision is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of grain detection, and in particular to a grain moisture detection device. Background Art

[0002] Moisture content is one of the important indicators of grain quality. At present, grain moisture detectors are widely used in various links such as grain storage, transportation, processing, and sales. Force moisture sensors have the advantages of high accuracy and wide application range compared with resistance or capacitive sensors. Announcement No. CN 106769610 B published a force sensor and force-measuring grain moisture detection device for grain moisture detection. The elastic body adopts a V-shaped cantilever beam structure instead of the traditional rectangular cross-section beam structure as the key elastic element. The structure can adjust the stiffness and effective mass distribution state of the elastic body, achieve a larger sensitivity improvement, higher response and greater amplification; However, in this technical solution, the force sensor 100 also includes a second roller shaft mounting hole 121 and a first roller shaft mounting hole 113. According to the principle of mechanical design, the second roller shaft mounting hole 121 and the first roller shaft mounting hole 113 are the shafts for mounting two rollers through bearings. When the free end 120, the strain beam 130 and the strain gauge 140 detect the extrusion force of grain deformation, it is necessary to overcome the gap between the free end 120 and the outer ring of the bearing, which reduces the detection accuracy. Summary of the invention

[0003] The invention aims to provide a grain moisture detection device, which can improve the measurement sensitivity by directly detecting the strain of the outer ring of the bearing.

[0004] The technical solution provided by the present invention is: a grain moisture detection device, comprising a base, two rollers are arranged on the base, each roller is connected to a transmission shaft through a flat key, the other end of the transmission shaft is connected to a motor through a coupling, the two transmission shafts are arranged in parallel, two standard bearings are installed on the left transmission shaft, and the standard bearings are rotatably connected to the transmission shaft through a standard bearing seat, a pressure cover and a shaft retaining ring; A standard bearing and a special bearing are installed on the right transmission shaft. The standard bearing is rotatably connected to the transmission shaft through a standard bearing seat, a gland and a shaft retaining ring, and the special bearing is rotatably connected to the transmission shaft through a special bearing seat, a gland and a shaft retaining ring. The special bearing of the right transmission shaft is located on the side close to the roller. The special bearing seat has a seat hole for installing the bearing outer ring. The special bearing seat has a notch on the right side of the seat hole. The special bearing includes a standard bearing inner ring, a roller and a special outer ring. A V-shaped arm is provided after the special outer ring extends out of the notch. The base is fixedly connected to the limit block A on the right side, and the other end of the V-shaped arm is against the limit block A. A strain gauge is pasted at the bend of the V-shaped arm.

[0005] The upper end face of the notch of the special bearing seat is horizontally tangent to the upper end of the seat hole. The special bearing seat is provided with an arc groove in the range from the lower end face of the notch to the lower end of the seat hole, and the arc groove does not contact the special outer ring.

[0006] The gap between the outer edges of the two rollers is smaller than the minimum diameter of the grains.

[0007] The base is fixedly connected to the limit block B, and the standard bearing seat on the left side of the special bearing seat is against the limit block B.

[0008] The beneficial effects of the present invention are as follows: by placing the deformation detection position on the special outer ring of the special bearing, the deformation during crushing of grain particles is directly detected, thereby overcoming the problem of insufficient detection accuracy caused by the inability to eliminate the gap between the bearing outer ring and the bearing seat during original detection. At the same time, the deformation is amplified by the V-shaped arm of the special outer ring, thereby further improving the detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Attached Figure 1 It is a schematic diagram of the structure of the present invention; Attached Figure 2 Attached Figure 1 AA section view; Attached Figure 3 It is a structural schematic diagram of the bearing seat B in the present invention; Attached Figure 4 It is the appearance diagram of the bearing seat in the present invention.

[0010] In the figure, 1-base, 2-transmission shaft, 3-roller, 4-standard bearing seat, 5-pressure cover, 6-shaft retaining ring, 7-coupling, 8-motor, 9-special bearing seat, 10-standard bearing, 11-special bearing, 12-special outer ring, 13-V-arm, 14-limit block A, 15-strain gauge, 16-limit block B, 17-notch, 18-arc groove, 19-seat hole. DETAILED DESCRIPTION

[0011] like Figures 1 to 4 As shown, a grain moisture detection device comprises a base 1, two rollers 3 are arranged on the base 1, each roller 3 is connected to a transmission shaft 2 through a flat key, the other end of the transmission shaft 2 is connected to a motor 8 through a coupling 7, the two transmission shafts 2 are arranged in parallel, two standard bearings 10 are installed on the left transmission shaft 2, and the standard bearing 10 is rotatably connected to the transmission shaft 2 through a standard bearing seat 4, a pressure cover 5 and a shaft retaining ring 6; A standard bearing 10 and a special bearing 11 are installed on the right transmission shaft 2. The standard bearing 10 is rotatably connected to the transmission shaft 2 through a standard bearing seat 4, a pressure cover 5 and a shaft retaining ring 6. The special bearing 11 is rotatably connected to the transmission shaft 2 through a special bearing seat 9, a pressure cover 5 and a shaft retaining ring 6. The special bearing 11 of the right transmission shaft 2 is located on the side close to the roller 3. The special bearing seat 9 has a seat hole 19 for installing the bearing outer ring. The special bearing seat 9 has a notch 17 on the right side of the seat hole 19. The special bearing 11 includes a standard bearing inner ring, a roller and a special outer ring 12. The special outer ring 12 is provided with a V-shaped arm 13 after extending out of the notch 17. The base 1 is fixedly connected to the limit block A14 on the right side. The other end of the V-shaped arm 13 is against the limit block A14. The strain gauge 15 is pasted at the bending part of the V-shaped arm 13.

[0012] When the grain particles are rolled by the two rollers 3, since the transmission shaft 2 is rotating, the gap between the transmission shaft 2, the inner ring of the bearing, the roller and the special outer ring 12 in the right direction is eliminated by the pressure between the two rollers 3, and the pressure deformation of the rolled grain particles is directly transmitted to the V-shaped arm 13 on the special outer ring 12. The strain gauge 15 is pasted at the bending part of the V-shaped arm 13 to amplify the deformation and improve the detection accuracy.

[0013] By placing the deformation detection position on the special outer ring 12 of the special bearing 11, the deformation during crushing of grain particles can be directly detected, thereby overcoming the problem of insufficient detection accuracy caused by the inability to eliminate the gap between the bearing outer ring and the bearing seat during original detection. At the same time, the deformation is amplified by the V-shaped arm 13 of the special outer ring 12 to further improve the detection accuracy.

[0014] The upper end surface of the notch 17 of the special bearing seat 9 is horizontally tangent to the upper end of the seat hole 19. The special bearing seat 9 is provided with an arc groove 18 in the range from the lower end surface of the notch 17 to the lower end of the seat hole 19. The arc groove 18 does not contact the special outer ring 12. This structure allows the right side of the special outer ring 12 to have unlimited position and meets the installation requirements of the special outer ring 12.

[0015] The gap between the outer edges of the two rollers 3 is smaller than the minimum diameter of the grains.

[0016] The base 1 is fixedly connected to the limit block B16 , and the standard bearing seat 4 on the left side of the special bearing seat 9 abuts against the limit block B16 to limit the lateral displacement of the standard bearing seat 4 .

Claims

1. A grain moisture detection device, comprising a base (1), characterized in that: Two rollers (3) are provided on the base (1), each roller (3) is connected to a transmission shaft (2) via a flat key, the other end of the transmission shaft (2) is connected to a motor (8) via a coupling (7), the two transmission shafts (2) are arranged in parallel, two standard bearings (10) are installed on the left transmission shaft (2), and the standard bearings (10) are rotatably connected to the transmission shaft (2) via a standard bearing seat (4), a pressure cover (5) and a shaft retaining ring (6); A standard bearing (10) and a special bearing (11) are installed on the right transmission shaft (2); the standard bearing (10) is rotatably connected to the transmission shaft (2) through a standard bearing seat (4), a pressure cover (5) and a shaft retaining ring (6); and the special bearing (11) is rotatably connected to the transmission shaft (2) through a special bearing seat (9), a pressure cover (5) and a shaft retaining ring (6); The special bearing (11) of the right transmission shaft (2) is located on the side close to the roller (3). The special bearing seat (9) has a seat hole (19) for installing the bearing outer ring. The special bearing seat (9) has a notch (17) on the right side of the seat hole (19). The special bearing (11) includes a standard bearing inner ring, a roller and a special outer ring (12). The special outer ring (12) is provided with a V-shaped arm (13) after extending out of the notch (17). The base (1) is fixedly connected to a limit block A (14) on the right side. The other end of the V-shaped arm (13) is against the limit block A (14). A strain gauge (15) is pasted on the bending part of the V-shaped arm (13).

2. A grain moisture detection device according to claim 1, characterized in that: The upper end surface of the notch (17) of the special bearing seat (9) is horizontally tangent to the upper end of the seat hole (19); the special bearing seat (9) is provided with an arc groove (18) in the range from the lower end surface of the notch (17) to the lower end of the seat hole (19); the arc groove (18) does not contact the special outer ring (12).

3. A grain moisture detection device according to claim 1, characterized in that: The gap between the outer edges of the two rollers (3) is smaller than the minimum diameter of the grains.

4. A grain moisture detection device according to claim 1, characterized in that: The base (1) is fixedly connected to the limit block B (16), and the standard bearing seat (4) on the left side of the special bearing seat (9) is against the limit block B (16).

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