CN216987792U

CN216987792U - Structure is eliminated to variable speed rice huller operation abnormal sound

Info

Publication number: CN216987792U
Application number: CN202220058401.2U
Authority: CN
Inventors: 章洪斌; 袁烨; 许建伟; 戚凌峰
Original assignee: Zhejiang Zhancheng Machinery Co ltd
Current assignee: Zhejiang Zhancheng Machinery Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-07-19
Anticipated expiration: 2032-01-11

Abstract

The utility model discloses a variable speed rice huller running abnormal sound eliminating structure, which comprises a main shaft and a rubber roller, wherein two groups of belt pulleys are sleeved outside the main shaft, and a binder is slidably bonded on the main shaft; the main shaft is provided with an inner hole, a movable pull rod is arranged in the inner hole, the pull rod is connected with the combiner, and the combiner can be driven to slide along the main shaft when the pull rod moves; the two sides of the combiner are respectively provided with a combiner tooth, one side of the belt wheel close to the combiner is provided with a belt wheel tooth groove matched with the combiner tooth, and the non-stressed side of the belt wheel tooth groove is provided with a pre-clamping step. The utility model can lead the two rubber rollers of the rice huller to alternately work at high speed and low speed, lead the two rubber rollers to be worn relatively uniformly and eliminate abnormal sound.

Description

Structure is eliminated to variable speed rice huller operation abnormal sound

Technical Field

The utility model relates to the technical field of rice milling equipment, in particular to a structure for eliminating abnormal sound generated during operation of a variable-speed rice huller.

Background

Rice is mainly hulled by the linear speed difference between rubber rollers of the rice huller. Traditional rice huller shifts through the gearbox and balances the wearing and tearing of rubber roll, but oil vapor and noise in the gearbox have always been a problem. The rice huller without a gearbox is also available in the market, hulling is carried out by a fixed belt wheel and a constant transmission speed ratio, after long-time work, the rubber roller is subjected to fast roller grinding loss and slow roller grinding loss, the linear speed difference of the rubber roller is caused to change, the rubber roller is not completely used, waste is caused, the rubber roller is replaced manually, and the working strength is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a structure for eliminating abnormal noise during operation of a variable-speed rice huller, and aims to solve the problems in the prior art in the background technology.

The technical problem of the utility model is mainly solved by the following technical scheme: a variable speed rice huller operation abnormal sound elimination structure comprises a main shaft and a rubber roller, wherein two groups of belt pulleys are sleeved outside the main shaft, and a binder is slidably connected to the main shaft in a key joint mode, so that the binder can be selectively meshed with any belt pulley;

the main shaft is provided with an inner hole, a movable pull rod is arranged in the inner hole, the pull rod is connected with the combiner, and the combiner can be driven to slide along the main shaft when the pull rod moves;

the combined sub-gear is arranged on each of two sides of the combined sub-gear, a belt wheel tooth groove matched with the combined sub-gear is formed in one side, close to the combined sub, of the belt wheel, and a pre-clamping step is arranged on the non-stressed side of the belt wheel tooth groove when the belt wheel drives the combined sub to rotate.

Preferably, a gear shifting cylinder is arranged on the outer side of the pull rod, and the output end of the gear shifting cylinder is connected with the pull rod.

Preferably, the main shaft is provided with a strip-shaped external spline, and the combiner is provided with an internal sliding key matched with the external sliding key.

Preferably, the width of the opposite bottom of the toothed slot of the belt pulley is slightly larger than that of the combined sub-teeth, and the difference is not more than 2 mm.

In the present invention, the "non-force-receiving side" refers to the side opposite to the force-receiving side of the pulley tooth groove when the driving relationship is generated between the pulley tooth groove and the coupling sub-tooth.

Compared with the prior art, the utility model has the advantages that:

1. according to the utility model, two groups of belt wheels with different speed ratios are arranged on the main shaft, and the combination of the main shaft and the belt wheel with higher speed or the belt wheel with lower speed is selected by the combiner, so that the two rubber rollers of the rice huller can alternately work at high speed and low speed, and the two rubber rollers are relatively uniformly worn.

2. The utility model can eliminate abnormal sound under the condition of not influencing normal gear engagement by arranging the pre-clamping step on the tooth groove of the belt wheel.

Drawings

Fig. 1 is a schematic cross-sectional view of the present invention.

Fig. 2 is a schematic perspective view of the present invention (with one of the pulleys hidden).

FIG. 3 is a schematic diagram of the structure of the linker of the present invention.

Fig. 4 is a schematic view of the structure of the pulley of the present invention.

Fig. 5 is a schematic view of the engaging sub-teeth entering the pre-detent step in the present invention.

Fig. 6 is a schematic view of the present invention incorporating a secondary tooth entering the final pocket of a pulley spline.

In the figure: 1. a rubber roller; 2. a main shaft 21, an external spline; 3. a bearing seat; 4. a belt wheel 41, a belt wheel tooth groove 42 and a pre-clamping step; 5. a combiner 51, an inner spline 52 and a combiner tooth; 6. a pull rod; 7. and a shifting cylinder.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further specifically described below by way of embodiments in combination with the accompanying drawings.

Example (b): a kind of speed change rice huller operates the abnormal sound to dispel the structure, as shown in fig. 1-4, including the basic shaft 2 supported on bearing bracket 3 and rubber roll 1 fixed on basic shaft 2, the basic shaft 2 is fitted with two groups of belt pulleys 4 of different speed ratios through the bearing, the external motor power is transmitted to the belt pulley 4 through the belt; a combiner 5 is arranged on the main shaft 2 and located between the two groups of belt wheels, the combiner 5 is connected with the main shaft 2 through a spline, and the combiner 5 can slide along the main shaft 2, so that the combiner 5 is selectively switched to be combined with any belt wheel 4 through sliding, power can be transmitted to the main shaft 2, and the rubber roller 1 is driven to rotate. Specifically, the main shaft 2 is provided with a strip-shaped external spline 21, and the combiner 5 is provided with an internal spline 51 matched with the combiner, so that the combiner 5 can slide along the main shaft 2, and the main shaft 2 can be driven to rotate when the combiner 5 rotates.

In the structure, an inner hole is formed in the main shaft 2, a pull rod 6 is arranged in the inner hole, the pull rod 6 can slide in the main shaft 2 along the length direction and is driven by the gear shifting cylinder 7, and the output end of the gear shifting cylinder 7 is connected with the pull rod 6. The pull rod 6 is connected with the combiner 5, so that the pull rod 6 can drive the combiner 5 to slide along the main shaft 2. Specifically, a connecting piece penetrating through the main shaft 2 is provided in the coupling 5 (the main shaft 2 is correspondingly provided with a groove through which the connecting piece passes and moves), and the end portion of the pull rod 6 and the connecting piece are mutually limited in the longitudinal direction of the main shaft, but have a degree of freedom in the direction along the circumferential direction of the main shaft.

The two sides of the combiner 5 are respectively provided with a combiner tooth 52, and one side of the belt wheel 4 close to the combiner 5 is provided with a belt wheel tooth groove 41 matched with the combiner tooth 52. When the speed ratio needs to be changed, the working state of the gear shifting cylinder 7 is controlled, the gear shifting cylinder 7 drives the pull rod 6 to move, and then the combiner 5 is driven to slide along the main shaft 2, so that the combiner 5 can be selectively meshed with one group of belt wheels, and the speed ratio switching is completed.

When the rice huller is operated, since the engaging sub-teeth 52 are different from the gears, in order to be engaged smoothly, the width of the pulley tooth grooves 41 needs to be larger than the tooth width of the engaging sub-teeth to be engaged smoothly, so that a gap exists between the pulley tooth grooves 41 and the engaging sub-teeth 52 during engagement. After the rice huller runs for a period of time, critical speed can occur on two rubber rollers (one is fast and one is slow) of the rice huller, the fast rubber rollers directly transmit friction force between the rubber rollers to a connector of the other rubber roller in a reverse direction, and at this time, the connector teeth 52 repeatedly impact two sides in the gear slot 41 to cause abnormal knocking sound. In this regard, the present embodiment is further improved.

Specifically, in the present embodiment, a pre-positioning step 42 is provided on the non-force-receiving side of the pulley tooth groove 41, and the groove width of the pulley tooth groove at the bottom of the step is slightly larger than the tooth width of the engaging sub-tooth 52, but the difference is not more than 3mm, preferably 1-2 mm; the width of the upper part is larger than the tooth width of the sub-combining tooth 52, so that the sub-combining tooth 52 can be smoothly clamped into the pre-clamping step 42 when the sub-combining tooth and the sub-combining tooth are combined, and the engaging of the sub-combining tooth 5 is not influenced, as shown in fig. 5; when the speed reaches the critical speed, the coupling sub-teeth 52 are engaged with the final slot, as shown in fig. 6, and the gap of the final slot is small, so that abnormal noise can be eliminated.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the utility model is not limited to the above-described embodiments, but that many variations are possible. Any simple modifications and equivalents of the above embodiments made in accordance with the technical spirit of the present invention should be considered as falling within the scope of the present invention.

Claims

1. A structure for eliminating abnormal sound generated during operation of a variable-speed rice huller comprises a main shaft and a rubber roller, and is characterized in that two groups of belt wheels are sleeved outside the main shaft, and a binder is slidably bonded on the main shaft so that the binder can be selectively meshed with any belt wheel;

2. The structure of claim 1, wherein a shift cylinder is disposed outside the pull rod, and an output end of the shift cylinder is connected to the pull rod.

3. The structure of claim 1, wherein the main shaft is provided with a strip-shaped external spline, and the binder is provided with an internal spline matching the external spline.

4. The structure of claim 1, wherein the width of the belt wheel tooth space relative to the bottom is slightly larger than the width of the combined sub-teeth, and the difference is not more than 3 mm.