TWM536221U - Elastic scraper - Google Patents

Description

Elastic scraper

The present invention provides an elastic blade, especially a blade adapted to remove residue from the conveyor belt.

According to the conveyor belt, in the process of transporting bulk cargo such as gravel, concrete or coal mine, some residue will adhere to the surface of the conveyor belt. If these residues are not removed properly, it will affect the conveying effect of the conveyor belt and shorten the service life of the conveyor belt. In order to scrape the residue adhering to the conveyor belt and prevent pollution of the environment, a first cleaner is installed at the corner of the conveyor belt and a second cleaner is installed below the conveyor belt. Each of the cleaners individually includes a scraper for abutting against the surface of the conveyor belt so that residue on the conveyor belt can be removed by the scraper. However, due to the lack of shock absorption and cushioning, the scraper on the conventional conveyor cleaner is prone to loosening or damage under the impact caused by vibration or beating of the conveyor belt for a long time, and often needs to be replaced to improve the cleaning of the conveyor belt. The cost of the device.

Figure 1 shows a conventional doctor blade 10 comprising an elastic lower portion 12 and a rigid upper portion 14 for assembly on a seat (not shown), the top end of which can abut against a conveyor belt ( Surface not shown). The scraper 10 further includes an opposite front side 15 and a rear side 16 , and the front side 15 and the rear side 16 are individually provided with a recess 17 , 18 . Accordingly, when the top end of the upper portion 14 is subjected to the pushing of the surface of the conveyor belt, the blade 10 can be deformed along the lateral and/or longitudinal deformation to absorb the impact of the residue on the blade 10 to achieve the ability to cushion the shock absorbing effect. However, the residue on the surface of the conveyor belt and the dust from the outside may accumulate in the recess 18 of the rear side 16, causing a negative influence on the deformation and bending ability of the blade 10 and the cushioning damping effect.

Accordingly, the object of the present invention is to provide an elastic blade which is suitable for removing residues on a conveyor belt and which can increase the effects of bending deformation and resilience.

An elastic blade constructed in accordance with an embodiment of the present invention includes a bottom portion that can be attached to a top of the conveyor belt, a bottom portion mountable on a holder, and an intermediate portion between the top portion and the bottom portion, the blade further The front surface and the rear surface are opposite to each other in a thickness direction, and the rear surface of the intermediate portion is provided with an inwardly concave recess, the recess defines an outer opening on the rear surface, and the rear surface of the intermediate portion is further provided with a shielding portion The outer opening of the recess is shielded.

In an embodiment, the shielding portion extends from an upper end of the recess toward a lower end of the recess and engages a lower end of the recess.

In another embodiment, the shielding portion extends from the upper end of the recess toward the lower end of the recess and is spaced apart from the lower end of the recess to form a notch.

In a preferred embodiment, the scraper further includes opposing first and second sides, the recess being concavely curved and extending from the first side to the second side. The front surface of the intermediate portion is provided with a convex portion that protrudes outward in an arc shape, and the concave portion and the convex portion are opposite to each other in the thickness direction, so that a small portion is formed between the concave portion and the convex portion. The curved portion of the thickness. The recess is positioned between the shielding portion and the curved portion in the direction of the thick portion.

Other objects, advantages and features of the present invention will be apparent from the following description of the preferred embodiments illustrated herein.

10‧‧‧Scraper

12‧‧‧ lower

14‧‧‧ upper

15‧‧‧ front side

16‧‧‧ Back side

17, 18‧‧‧ recess

20‧‧‧Scraper

22‧‧‧cleaner

24‧‧‧ conveyor belt

26‧‧‧Knife holder

28‧‧‧ bracket plate

30‧‧‧ shaft

32‧‧‧Flexor application device

34‧‧‧Act

36‧‧‧Flange

38‧‧‧ screws

40, 42‧‧‧ end

44‧‧‧ bottom

46‧‧‧ concave

48‧‧‧Top

50‧‧‧ trench

52‧‧‧Fixed ring

54‧‧‧ top

56‧‧‧ bottom

58‧‧‧ middle part

60‧‧‧ front surface

62‧‧‧Back surface

64‧‧‧ first side

66‧‧‧ second side

68‧‧‧ convex

70‧‧‧ recess

72‧‧‧Bend

74‧‧‧Shading Department

76‧‧‧Upper

78‧‧‧Bottom

80‧‧‧ openings

82‧‧‧ gap

F‧‧‧External force

Figure 1 is a schematic view showing a conventional doctor blade.

Figure 2 shows a perspective view of a conveyor cleaner comprising a doctor blade of an embodiment of the present invention.

Figure 3 shows a schematic view of the cleaner of Figure 2 disposed at the corner of the blanking end of the conveyor belt.

Figure 4 is a perspective view showing the assembly of a plurality of the inventive blades on a holder.

Figure 5 shows a plan view of the doctor blade of Figure 2.

Fig. 6 is a view showing the bending deformation of the blade of Fig. 5 after being subjected to an external force.

Fig. 7 is a plan view showing a doctor blade of another embodiment of the present invention.

Fig. 8 is a view showing the bending deformation of the blade of Fig. 7 after being subjected to an external force.

The preferred embodiment of the present invention will now be described by way of example only and not by way of limitation, 2 shows a conveyor belt cleaner 22 incorporating an elastic blade 20 of an embodiment of the present invention. FIG. 3 shows that the cleaner 22 is disposed at a corner of a blanking end of a conveyor belt 24 for scraping attachment to the conveyor belt 24. Residue on top (not shown). As shown in FIG. 2 to FIG. 4, the cleaner 22 includes a plurality of scrapers 20, a holder 26 for assembling the plurality of scrapers 20, a pair of bracket plates 28, a shaft 30, and at least one elastic applying device 32. The holder 26, the pair of holder plates 28, the shaft 30, and the elastic applying device 32 are conventional techniques, and are summarized as follows.

The two bracket plates 28 are spaced apart across the two sides in the width direction of the conveyor belt 24. Each of the brackets 28 is provided with a ring body 34. The bottom side of the ring body 34 has a mounting flange 36 extending through the flange 36 and the bracket plate 28 to lock the ring body 34 to the bracket. On board 28. The shaft 30 includes two end portions 40, 42 that are integrally assembled through the two ring bodies 34 and assembled on the two bracket plates 28. The bottom end 44 of the seat 26 has an arcuate concave surface 46 for mounting on the top surface of the shaft 30 (see FIG. 4). The top end 48 of the seat 26 has a groove 50 for providing the number of scrapers 20 Assembly. The two ends of the holder 26 are individually coupled to a fixing ring 52 which is fixed to the shaft 30 so that the holder 26 can be firmly coupled to the shaft 30. In the present embodiment, the cleaner 22 includes two elastic force applying devices 32 that are individually mounted on a corresponding bracket plate 28 and combined with the two end portions 40, 42 of the shaft 30. By applying a bias to the shaft 30, the tension of the number of the scrapers 20 contacting the conveyor belt 24 is provided, so that the number of scrapers 20 can clean the conveyor belt 24 by scraping the residue.

The present invention is characterized by the structural design of the scraper 20, as shown in Figures 4 and 5, the scraper 20 includes a bottom portion 56 that can be abutted against a conveyor belt 24, and a bottom portion 56 that can be mounted on the seat 26 And an intermediate portion 58 between the top portion 54 and the bottom portion 56. In the present embodiment, the top portion 54, the bottom portion 56 and the intermediate portion are integrally formed of an elastic material such as rubber, however, in a possible embodiment The top portion 54 can be made of a rigid material such as tungsten carbide or ceramic and then joined to an intermediate portion 58 made of an elastomeric material. In the present embodiment, the groove 50 of the holder 26 has a dovetail shape, and the bottom 56 of the blade 20 is incorporated in the groove 50 of the holder 26 and is movable along the length of the holder 26. . The scraper 20 further includes a front surface 60 and a rear surface 62 that face each other in the thickness direction, and a first side surface 64 and a second side surface 66 that are opposite to each other in the longitudinal direction of the holder 26. The front surface 60 of the intermediate portion 58 is provided with a convex portion 68 which projects outward in an arc shape. The rear surface 62 of the intermediate portion 58 is provided with a recess 70 which is arcuate. The ground is recessed inward. In this embodiment, the recess 70 extends from the first side surface 64 to the second side surface 66 and is opposite to the convex portion 68 in the thickness direction, so that a small portion is formed between the recess portion 70 and the convex portion 68. A curved portion 72 of thickness. Moreover, the recess 70 has an upper end 76 adjacent the top portion 54 and a lower end 78 adjacent the bottom portion 56. The rear surface 62 of the intermediate portion 58 is further provided with a shielding portion 74 extending from the upper end 76 of the recess 70 to the lower end 78 such that the recess 70 is tied to the shielding portion 74 and the curved portion in the thick portion direction. Between the portions 72, and such that the shield portion 74 can shield the recess 70 from the outer opening 80 defined by the rear surface 62. In the present embodiment, the thickness of the shielding portion 74 in the thick portion is smaller than the curved portion 72 and is approximately equal to 50% of the curved portion 72.

In practice, the cleaner 22 can adjust the inclination of the blade 20 relative to the conveyor belt 24 by the rotation of the shaft 30 relative to the bracket plate 28, so that the top portion 54 of the blade 20 can be adjusted to conform to the surface of the conveyor belt 24. The abutment position (see Fig. 3); in addition, the biasing force is provided by the elastic force applying means 32 to bring the blade 20 into contact with the surface of the conveyor belt 24 with an appropriate tension. Moreover, the scraper 20 of the present invention can improve the bending deformation ability and increase the resilience by the intermediate portion 58 having the recess 70, so that the scraper 20 is subjected to the impact force caused by the running vibration or the residue of the conveyor belt for a long time. It is also not easy to loose or damage, and thus can improve the cleaning effect of the residue. Specifically, as shown in FIG. 6, when the top portion 54 of the blade 20 is subjected to an external force F (for example, an impact force of the surface residue of the conveyor belt 24), the top portion 54 of the blade 20 will be bent laterally, so that The scraper 20 has a cushioning effect to extend the service life, while the outer opening 80 of the recess 70 is shielded by the shielding portion 74, so that the residue on the surface of the conveyor belt 24 and the external dust do not accumulate in the recess 70, and thus, The lateral bending of the blade 20 can be prevented from being adversely affected by the residue and the external dust. Further, since the shielding portion 74 extends from the upper end 76 of the recess 70 to the lower end 78 and is coupled to the lower end 78, when the blade is used When the top portion 54 of the 20 is bent laterally, the shielding portion 74 is also bent inward (see FIG. 6), and thus, when the external force F is removed, the inwardly curved shielding portion 74 rebounds to increase The resilient resilience of the blade 20 allows the top portion 54 of the blade 20 to quickly abut against the surface of the conveyor belt 24 to continue the scraping cleaning action of the residue.

FIG. 7 shows a doctor blade 20 constructed according to another embodiment of the present invention. The difference between this embodiment and the first embodiment is that the shielding portion 74 is not connected to the lower end 78 of the recess 70, but is separated to form a notch 82. As shown in FIG. 8, when the top portion 54 of the blade 20 is subjected to an external force F (for example, an impact force of the surface residue of the conveyor belt 24), the top 54 of the blade 20 will follow. The lateral bending causes the scraper 20 to have a cushioning effect to prolong the service life, while the outer opening 80 of the recess 70 is shielded by the shielding portion 74, so that the residue on the surface of the conveyor belt 24 and the external dust will not accumulate. In the recess 70, therefore, the lateral bending of the blade 20 can be prevented from being adversely affected by the residue and external dust.

The above description is only a detailed description of the preferred embodiment of the present invention and is not intended to limit the present invention. All of the scope of the present invention is subject to the scope of the following patent application, and the embodiments of the invention as described in the following claims should be included in the present invention.

20‧‧‧Scraper

22‧‧‧cleaner

26‧‧‧Knife holder

30‧‧‧ shaft

40, 42‧‧‧ end

44‧‧‧ bottom

46‧‧‧ concave

48‧‧‧Top

50‧‧‧ trench

52‧‧‧Fixed ring

54‧‧‧ top

56‧‧‧ bottom

58‧‧‧ middle part

60‧‧‧ front surface

62‧‧‧Back surface

64‧‧‧ first side

66‧‧‧ second side

68‧‧‧ convex

70‧‧‧ recess

74‧‧‧Shading Department

Claims (8)

An elastic scraper comprising a bottom portion mountable on a top of a conveyor belt, a bottom portion mountable on a seat, and an intermediate portion between the top portion and the bottom portion, the scraper blade further including a thickness direction opposite a front surface and a rear surface, the rear surface of the intermediate portion is provided with an inwardly recessed recess, the recess defining an outer opening at the rear surface, and the rear surface of the intermediate portion is further provided with a shielding portion for the outer side of the recess The opening is shielded. The elastic blade according to claim 1, wherein the shielding portion extends from an upper end of the concave portion toward a lower end of the concave portion and is coupled to a lower end of the concave portion. The elastic blade according to claim 1, wherein the shielding portion extends from an upper end of the concave portion toward a lower end of the concave portion and is spaced apart from a lower end of the concave portion to form a notch. The elastic blade according to claim 2, wherein the front surface of the intermediate portion is provided with a convex portion that protrudes outward in an arc shape, and the concave portion and the convex portion are in the thickness direction. In contrast, a curved portion having a small thickness is formed between the concave portion and the convex portion, and the concave portion is tied between the shielding portion and the curved portion in the thick portion direction. The elastic blade according to claim 4, wherein the shielding portion has a thickness in the thickness direction smaller than the curved portion. The elastic blade according to claim 2, wherein the blade further comprises an opposite first side and a second side, the recess being concavely curved and extending from the first side to the second side. The elastic blade according to claim 6, wherein the front surface of the intermediate portion is provided with a convex portion that protrudes outward in an arc shape, and the concave portion and the convex portion are opposite to each other in the thickness direction. A curved portion having a small thickness is formed between the concave portion and the convex portion, and the concave portion is tied between the shielding portion and the curved portion in the thick portion direction. The elastic blade according to claim 7, wherein the shielding portion has a thickness in the thick portion that is smaller than the curved portion.