A friction clutch for feeding roller of grinding mill

Abstract

The present invention discloses a friction clutch for feeding roller of a grinding mill, comprising a driving wheel and a driving shaft, which are connected to achieve the function of transmitting torque, a driven part is a driven shaft, which can be connected to the feeding roller shaft through a wedge-shaped interface at the shaft end, a clutch body is an eccentric shaft, a clutch sleeve, a friction plate return spring, etc., and when the eccentric shaft rotates, the clutch sleeve is controlled to move axially to push the friction plate to engage or separate, so as to achieve an engaged or disengaged state. The clutch is controlled by the pneumatic circuit of the grinding mill control system to control the cylinder, drive the eccentric shaft to rotate, and realize clutch control. The clutch adopts a fully enclosed structure, and the moving parts are wrapped in the clutch housing. The structure is compact, not polluted by external dust, the clutch action is flexible and rapid, the reliability is high, and the feeding roller can be ensured to work smoothly when it stops.

Description

Technical Field

[0001] The invention relates to a clutch, in particular to a grinding mill feeding roller friction clutch, belonging to the technical field of grain processing equipment. Background Art

[0002] The feeding roller clutch of the grinding mill is an indispensable device of the grinding mill, which controls the important action of whether the feeding roller feeds during the grinding process. After the grinding rollers are closed, the feeding rollers rotate to realize the feeding function. Before the grinding rollers are separated, the feeding rollers stop rotating to close the feeding. Therefore, the rotation and stop of the feeding rollers directly affect the working performance of the grinding mill.

[0003] There are many types of existing mill feed roller clutches, and their performance varies. The tooth clutch is accompanied by a large impact load when engaging and disengaging, causing parts wear and failure. Traditional pneumatic clutches have many parts and a complex structure. When the parts are worn, they will leak, resulting in frequent maintenance. Early mechanical clutches have problems with limited lubrication and dust pollution, resulting in premature wear and failure of parts. Summary of the invention

[0004] The object of the present invention is to provide a grinding mill feed roller friction clutch in order to solve the above-mentioned problems.

[0005] The present invention achieves the above-mentioned purpose through the following technical scheme: a grinding mill feeding roller friction clutch, comprising a housing, a driven shaft, a return spring, and a clutch sleeve are arranged in the housing, the tail end of the driven shaft is connected to the front end of the driving shaft, the clutch sleeve can slide axially on the driven shaft, the clutch sleeve is provided with an eccentric shaft, a shifting shaft rod, and a static friction plate adhered to the side of the clutch sleeve, one end of the shifting shaft rod is pushed by the cylinder of the control circuit, and the other end of the shifting shaft rod rotates the eccentric shaft to shift the clutch sleeve away from the dynamic friction plate, the static friction plate and the dynamic friction plate are arranged side by side in the housing, the friction plate is adhered to the driving shaft, the driving shaft is connected to the driving wheel through a flat key, and the flat key is arranged between the driving shaft and the driving wheel.

[0006] As a further solution of the present invention: the driving wheel moves in a circular motion through a belt transmission, and the driving wheel and the driving shaft rotate synchronously.

[0007] As a further solution of the present invention: the driven shaft end is provided with a wedge-shaped interface, which can be connected with the wedge-shaped interface corresponding to the feeding roller shaft, and the driven shaft and the clutch sleeve can both slide axially and rotate synchronously circumferentially.

[0008] As a further solution of the present invention: when the static friction plate on the clutch sleeve contacts the dynamic friction plate on the driving shaft, the pressure of the return spring generates friction force to make the static friction plate follow the dynamic friction plate to make circular motion and achieve synchronous motion.

[0009] As a further solution of the present invention: when the clutch sleeve is pushed away from the dynamic friction plate by the eccentric shaft, the static friction plate and the dynamic friction plate are separated, so that the clutch sleeve is separated from the rotation of the driving shaft, thereby achieving the separation of the driven shaft from the driving shaft.

[0010] The beneficial effects of the present invention are as follows: the friction clutch of the feeding roller of the grinding mill is reasonably designed, the clutch is controlled by the pneumatic circuit of the grinding mill control system to control the cylinder, drive the eccentric shaft to rotate, and realize clutch control; the clutch adopts a fully enclosed structure, and the moving parts are wrapped in the clutch housing, the structure is compact, and it is not polluted by external dust. The clutch action is flexible and rapid, the reliability is high, and the feeding roller can be ensured to work smoothly when it stops. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the present invention.

[0012] In the figure: 1, driven shaft, 2, housing, 3, return spring, 4, clutch sleeve, 5, shifting shaft rod, 6, eccentric shaft, 7, static friction plate, 8, dynamic friction plate, 9, driving shaft, 10, driving wheel and 11, flat key. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0014] See also Figure 1 A grinding mill feeding roller friction clutch comprises a housing 2, wherein a driven shaft 1, a return spring 3 and a clutch sleeve 4 are arranged in the housing 2, the tail end of the driven shaft 1 is connected to the front end of a driving shaft 9, the clutch sleeve 4 can slide axially on the driven shaft 1, an eccentric shaft 6, a shifting shaft rod 5 and a static friction plate 7 adhered to the side of the clutch sleeve 4 are arranged on the clutch sleeve 4, one end of the shifting shaft rod 5 is pushed by a cylinder of a control circuit, and the other end of the shifting shaft rod 5 rotates the eccentric shaft 6 to shift the clutch sleeve 4 away from the dynamic friction plate 8, the static friction plate 7 and the dynamic friction plate 8 are arranged side by side in the housing 2, the friction plate 8 is adhered to the driving shaft 9, and the driving shaft 9 is connected to the driving wheel 10 through a flat key 11, and the flat key 11 is arranged between the driving shaft 9 and the driving wheel 10.

[0015] Furthermore, in the embodiment of the present invention, the driving wheel 10 is driven by a belt to perform circular motion, and the driving wheel 10 and the driving shaft 9 rotate synchronously.

[0016] Furthermore, in the embodiment of the present invention, the driven shaft 1 is provided with a wedge-shaped interface at its shaft end, which can be connected to the wedge-shaped interface corresponding to the feeding roller shaft, and the driven shaft 1 and the clutch sleeve 4 can both slide axially and rotate synchronously circumferentially.

[0017] Furthermore, in an embodiment of the present invention, when the static friction plate 7 on the clutch sleeve 4 contacts the dynamic friction plate 8 on the driving shaft 9, the pressure of the return spring 3 generates friction force to make the static friction plate 7 follow the dynamic friction plate 8 to make circular motion and achieve synchronous motion.

[0018] Furthermore, in the embodiment of the present invention, when the clutch sleeve 4 is pushed away from the dynamic friction plate 8 by the eccentric shaft 6, the static friction plate 7 and the dynamic friction plate 8 are separated, so that the clutch sleeve 4 is separated from the rotation of the driving shaft 9, thereby achieving the separation of the driven shaft 1 from the driving shaft 9.

[0019] Working principle: When using the grinding mill feeding roller friction clutch, the cylinder in the pneumatic circuit is controlled to push the shifting shaft 5, so that it drives the eccentric shaft 6 to rotate, and then pushes the clutch sleeve 4 to slide axially on the driven shaft 1, so that the static friction plate 7 is separated from the dynamic friction plate 8, and the return spring is compressed to shrink, so as to realize the rotation separation of the driven shaft 1 and the driving shaft 9; when the shifting shaft 5 is acted upon by the reverse action of the cylinder, that is, when it rotates in the reverse direction, the eccentric shaft 6 also rotates in the reverse direction, pushing the clutch sleeve 4 to slide axially in the reverse direction, and the static friction plate 7 approaches the dynamic friction plate 8 to reach the engaged state. Under the pressure generated by the extension of the return spring, the two are tightly engaged, so that the driving shaft 9 and the driven shaft 1 are integrated to realize synchronous rotation. At this time, the rotation of the driving wheel 10 can be transmitted to the feeding roller through the driving shaft 9, the dynamic friction plate 8, the static friction plate 7, the clutch sleeve 4, and the driven shaft 1.

[0020] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and range of equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0021] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A grinding mill feed roller friction clutch, comprising a housing (2), characterized in that: A driven shaft (1), a return spring (3) and a clutch sleeve (4) are arranged in the housing (2). The tail end of the driven shaft (1) is connected to the front end of the driving shaft (9). The clutch sleeve (4) can slide axially on the driven shaft (1). The clutch sleeve (4) is provided with an eccentric shaft (6), a shifting shaft rod (5) and a static friction plate (7) adhered to the side of the clutch sleeve (4). One end of the shifting shaft rod (5) is pushed by a cylinder of a control circuit. The other end of the shifting shaft rod (5) rotates the eccentric shaft (6) to shift the clutch sleeve (4) away from the dynamic friction plate (8). The static friction plate (7) and the dynamic friction plate (8) are arranged side by side in the housing (2). The friction plate (8) is adhered to the driving shaft (9). The driving shaft (9) is connected to the driving wheel (10) through a flat key (11). The flat key (11) is arranged between the driving shaft (9) and the driving wheel (10). When the static friction plate (7) on the clutch sleeve (4) contacts the dynamic friction plate (8) on the driving shaft (9), the pressure of the return spring (3) generates friction force, causing the static friction plate (7) to follow the dynamic friction plate (8) to make circular motion, thereby achieving synchronous motion; When the clutch sleeve (4) is pushed away from the dynamic friction plate (8) by the eccentric shaft (6), the static friction plate (7) and the dynamic friction plate (8) are separated, so that the clutch sleeve (4) is separated from the rotation of the driving shaft (9), thereby achieving the separation of the driven shaft (1) and the driving shaft (9).

2. A grinding mill feed roller friction clutch according to claim 1, characterized in that: The driving wheel (10) moves in a circular motion through a belt transmission, and the driving wheel (10) and the driving shaft (9) rotate synchronously.

3. A grinding mill feed roller friction clutch according to claim 1, characterized in that: The driven shaft (1) is provided with a wedge-shaped interface at the shaft end, which can be connected with the wedge-shaped interface corresponding to the feeding roller shaft. The driven shaft (1) and the clutch sleeve (4) can both slide axially and rotate synchronously circumferentially.

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