阅读说明：本技术 夹紧组件、导料槽与带式输送机 (Clamping assembly, guide chute and belt conveyor ) 是由 涂建平 黄雷 周宽 刘寿恩 于 2020-06-10 设计创作，主要内容包括：本发明涉及一种夹紧组件、导料槽与带式输送机,夹紧组件包括转动压紧件、第一连接件与转动扳手。当转动扳手的头部转动到与导料槽的侧板相抵触的位置时,转动压紧件的一端抵触压紧挡皮。当转动扳手的头部转动到与导料槽的侧板相分离的位置时,转动压紧件松开挡皮。当需要拆卸挡皮时,按压驱动转动扳手的尾部,使转动扳手的头部转动到与导料槽的侧板相分离的位置,转动压紧件的端部相应松开挡皮,便可以将挡皮拆掉；当需要装设固定挡皮时,挡皮的顶部贴合到导料槽的侧板上后,按压驱动转动扳手,使得转动扳手的头部转动到与导料槽的侧板相抵触的位置,转动压紧件的一端抵触压紧挡皮。如此,能实现快速拆卸更换挡皮,工作效率较高。(The invention relates to a clamping assembly, a guide chute and a belt conveyor. When the head of the rotary wrench rotates to the position which is abutted against the side plate of the guide chute, one end of the rotary pressing piece is abutted against and presses the baffle leather. When the head of the rotary wrench rotates to a position separated from the side plate of the guide chute, the rotary pressing piece loosens the baffle leather. When the baffle skin needs to be disassembled, the tail part of the rotary wrench is pressed and driven, the head part of the rotary wrench is rotated to a position separated from the side plate of the guide chute, and the baffle skin is correspondingly loosened at the end part of the rotary pressing piece, so that the baffle skin can be disassembled; when fixed baffle skin is installed to needs, the top of baffle skin is laminated on the curb plate of baffle box on the back, presses the drive and rotates the spanner for the head that rotates the spanner rotates the position inconsistent with the curb plate of baffle box, and the one end of rotating the piece that compresses tightly is contradicted and is compressed tightly the baffle skin. So, can realize dismantling fast and change the fender skin, work efficiency is higher.)

1. A clamping assembly, characterized in that the clamping assembly comprises:

the device comprises a rotating pressing piece and a first connecting piece, wherein the rotating pressing piece is rotatably arranged on a side plate of the guide chute through the first connecting piece, and one end of the rotating pressing piece is used for abutting against and pressing or loosening a baffle skin;

the rotary wrench is rotatably connected with the other end of the rotary pressing piece, and the head of the rotary wrench is used for being in interference fit with a side plate of the guide chute; when the head of the rotary wrench rotates to a position where the head of the rotary wrench is abutted against a side plate of the guide chute, one end of the rotary pressing piece is abutted against and presses the baffle leather; when the head of the rotary wrench rotates to a position separated from the side plate of the guide chute, one end of the rotary pressing piece loosens the baffle.

2. The clamping assembly of claim 1, wherein said rotatable clamping member includes two spaced apart rotatable plates and a second connecting member connecting said two rotatable plates; the rotary spanner is rotatably arranged between the two rotating plates, and the tail of the rotary spanner extends out of the two rotating plates.

3. The clamping assembly as claimed in claim 2, wherein one end of the first connecting member is fixedly disposed on a side plate of the material guiding chute, the other end of the first connecting member is provided with a rotating shaft, a gap is disposed at a plate edge portion of the rotating plate, which is away from the side plate, the top of the gap is adapted to the shape of the rotating shaft, and the rotating shaft is rotatably disposed in the gap.

4. The clamping assembly as claimed in claim 3, wherein the first connecting member comprises a screw rod, one end of the screw rod is fixedly arranged on a side plate of the material guiding groove, an end of the screw rod is provided with a disengagement preventing end which is abutted against the side plate of the material guiding groove, and the rotating shaft is arranged on the other end of the screw rod.

5. The clamping assembly according to claim 4, wherein a positioning block is arranged at the other end of the screw rod, the positioning block is located between the two rotating plates, the positioning block is in contact fit with the rotating plates, the positioning block is further provided with a threaded hole adapted to the screw rod, and the screw rod is arranged in the threaded hole; the rotating shaft is arranged on the positioning block.

6. The clamping assembly of claim 3, wherein a positioning block is further disposed at the other end of the first connecting member, the positioning block is located between the two rotating plates, and the positioning block is in contact fit with the rotating plates.

7. The clamping assembly of claim 2 wherein said second connector is of unitary construction with both of said rotating plates.

8. A material guide chute is characterized by comprising two side plates, a top plate for connecting the two side plates, a baffle and the clamping assembly as claimed in any one of claims 1 to 7, wherein the clamping assembly is arranged on the side plates, and the baffle is fixed on the side plates by the end parts of the rotary pressing pieces.

9. A belt conveyor comprising a chute as in claim 8, further comprising a frame, rollers disposed on the frame, and a conveyor belt positioned over the rollers, the chute and the baffle being positioned over the conveyor belt.

10. The belt conveyor according to claim 9, further comprising an angle steel provided between the rotary pressing member and the stopper, wherein an end of the rotary pressing member presses the stopper through the angle steel.

Technical Field

The invention relates to the technical field of conveying devices, in particular to a clamping assembly, a guide chute and a belt conveyor.

Background

In many industrial fields such as metallurgy, coal, ports, power stations, grains and the like at home and abroad, a large number of guide chutes are provided for transferring coal, grains, silt and the like. And bottom baffle box both sides and afterbody such as shipment machine, ship unloader, switching tower, stacker-reclaimer, reclaimer all need to set up clamping component and press from both sides fender skin (for example rubber) to prevent that the material in the baffle box from spilling outward most, and the fender skin because of having great friction between with material or the conveyer belt, takes place wearing and tearing easily and leads to often needing to break off the operation change, and the change time is longer.

Traditionally, the clamping assembly adopts the direct clamping type of bolt and nut, or adopts the clamping type of bolt, nut and angle steel, or adopts the clamping type of part structure welding at the baffle box again, but current clamping type can't realize quick dismantlement and change, leads to changing the time that the fender skin and daily maintenance cost longer.

Disclosure of Invention

Based on this, it is necessary to overcome the defects in the prior art, and a clamping assembly, a material guide chute and a belt conveyor are provided, which can realize quick detachment and replacement of a baffle, and have high working efficiency.

The technical scheme is as follows: a clamping assembly, the clamping assembly comprising: the device comprises a rotating pressing piece and a first connecting piece, wherein the rotating pressing piece is rotatably arranged on a side plate of the guide chute through the first connecting piece, and one end of the rotating pressing piece is used for abutting against and pressing or loosening a baffle skin; the rotary wrench is rotatably connected with the other end of the rotary pressing piece, and the head of the rotary wrench is used for being in interference fit with a side plate of the guide chute; when the head of the rotary wrench rotates to a position where the head of the rotary wrench is abutted against a side plate of the guide chute, one end of the rotary pressing piece is abutted against and presses the baffle leather; when the head of the rotary wrench rotates to a position separated from the side plate of the guide chute, one end of the rotary pressing piece loosens the baffle.

When the baffle is required to be detached, the tail of the rotary wrench is pressed and driven by hands, so that the head of the rotary wrench is rotated to a position separated from a side plate of the guide chute, and the baffle is correspondingly loosened at the end of the rotary pressing piece, so that the baffle can be detached; when fixed fender skin is installed to needs, the top of fender skin is laminated on the curb plate of baffle box on the back, presses the position that the drive rotated the spanner with the hand for the head that rotates the spanner rotates the position inconsistent with the curb plate of baffle box, and the one end of rotating the piece that compresses tightly is contradicted and is compressed tightly the fender skin. Therefore, the baffle can be detached and replaced quickly, and the working efficiency is high.

In one embodiment, the rotating pressing piece comprises two rotating plates arranged at intervals and a second connecting piece for connecting the two rotating plates; the rotary spanner is rotatably arranged between the two rotating plates, and the tail of the rotary spanner extends out of the two rotating plates.

In one embodiment, one end of the first connecting piece is fixedly arranged on a side plate of the material guide chute, the other end of the first connecting piece is provided with a rotating shaft, a notch is arranged at the edge of the rotating plate, which is far away from the side plate, the top of the notch is matched with the shape of the rotating shaft, and the rotating shaft is rotatably arranged in the notch.

In one embodiment, the first connecting member includes a screw rod, one end of the screw rod is fixedly disposed on a side plate of the material guiding groove, an end of the screw rod is provided with an anti-falling end abutting against the side plate of the material guiding groove, and the rotating shaft is disposed at the other end of the screw rod.

In one embodiment, a positioning block is arranged at the other end of the screw rod and located between the two rotating plates, the positioning block is in contact fit with the rotating plates, a threaded hole matched with the screw rod is further formed in the positioning block, and the screw rod is arranged in the threaded hole; the rotating shaft is arranged on the positioning block.

In one embodiment, a positioning block is further arranged at the other end of the first connecting piece, the positioning block is located between the two rotating plates, and the positioning block is in contact fit with the rotating plates.

In one embodiment, the second connecting member is integrated with the two rotating plates.

The utility model provides a baffle box, includes two curb plates and connects two the roof of curb plate, still include the fender skin and clamping assembly, clamping assembly install in on the curb plate, the tip that rotates to compress tightly the piece will the fender skin is fixed in on the curb plate.

When the baffle leather needs to be detached, the tail of the rotary wrench is pressed and driven by hands, so that the head of the rotary wrench rotates to a position separated from a side plate of the baffle trough, and the baffle leather can be detached by correspondingly loosening the baffle leather at the end of the rotary pressing piece; when fixed fender skin is installed to needs, the top of fender skin is laminated on the curb plate of baffle box on the back, presses the position that the drive rotated the spanner with the hand for the head that rotates the spanner rotates the position inconsistent with the curb plate of baffle box, and the one end of rotating the piece that compresses tightly is contradicted and is compressed tightly the fender skin. Therefore, the baffle can be detached and replaced quickly, and the working efficiency is high.

The belt conveyor comprises the guide chute, a support, a roller arranged on the support and a conveying belt positioned above the roller, wherein the guide chute and the baffle are positioned above the conveying belt.

When the baffle leather needs to be disassembled, the tail part of the rotary wrench is pressed and driven by hands, so that the head part of the rotary wrench rotates to a position separated from the side plate of the guide chute, and the baffle leather can be disassembled by correspondingly loosening the baffle leather at the end part of the rotary pressing piece; when fixed fender skin is installed to needs, the top of fender skin is laminated on the curb plate of baffle box on the back, presses the position that the drive rotated the spanner with the hand for the head that rotates the spanner rotates the position inconsistent with the curb plate of baffle box, and the one end of rotating the piece that compresses tightly is contradicted and is compressed tightly the fender skin. Therefore, the baffle can be detached and replaced quickly, and the working efficiency is high.

In one embodiment, the belt conveyor further comprises an angle steel arranged between the rotating pressing piece and the baffle leather, and the end part of the rotating pressing piece presses the baffle leather through the angle steel.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a clamping assembly according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a belt conveyor according to an embodiment of the invention;

FIG. 3 is an enlarged schematic view of FIG. 2 at A;

FIG. 4 is a schematic view of a rotary pressing member of the clamping assembly according to an embodiment of the present invention;

FIG. 5 is a side view of a first connector of the clamping assembly in accordance with one embodiment of the present invention;

FIG. 6 is a top view of a first connecting member of the clamping assembly in accordance with one embodiment of the present invention;

fig. 7 is a schematic structural view of a rotating wrench of a clamping assembly according to an embodiment of the present invention.

10. A clamping assembly; 11. rotating the pressing member; 111. a rotating plate; 112. rotating the hole; 113. a notch; 114. a groove; 12. a first connecting member; 121. a rotating shaft; 122. a screw rod; 123. an anti-drop end; 124. positioning blocks; 13. rotating the wrench; 131. a head portion; 132. a connecting portion; 133. a tail portion; 14. a third connecting member; 20. a side plate; 30. a top plate; 40. blocking the skin; 50. a support; 60. a roller; 70. a conveyor belt; 80. and (5) angle steel.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 3, fig. 1 is a schematic structural diagram illustrating a clamping assembly 10 according to an embodiment of the present invention; FIG. 2 shows a schematic structural view of a belt conveyor according to an embodiment of the present invention; fig. 3 shows an enlarged schematic view of fig. 2 at a. An embodiment of the present invention provides a clamping assembly 10, wherein the clamping assembly 10 includes: a rotary pressing member 11, a first connecting member 12 and a rotary wrench 13. The rotating pressing member 11 is rotatably disposed on the side plate 20 of the material guide chute through the first connecting member 12, and one end of the rotating pressing member 11 is used for pressing against or releasing the blocking skin 40. The rotating wrench 13 is rotatably connected to the other end of the rotating pressing member 11, and a head 131 of the rotating wrench 13 is configured to be in interference fit with the side plate 20 of the material guide chute. When the head 131 of the rotating wrench 13 is rotated to a position to be abutted against the side plate 20 of the guide chute, one end of the rotating pressing member 11 abuts against the pressing stopper 40. When the head 131 of the rotation wrench 13 is rotated to a position separated from the side plate 20 of the guide chute, one end of the rotation pressing member 11 releases the stopper leather 40.

In the clamping assembly 10, when the baffle skin 40 needs to be detached, the tail 133 of the rotary wrench 13 is pressed and driven by hand, so that the head 131 of the rotary wrench 13 rotates to a position separated from the side plate 20 of the guide chute, and the end of the rotary pressing piece 11 correspondingly loosens the baffle skin 40, so that the baffle skin 40 can be detached; when the fixed baffle leather 40 needs to be installed, after the top of the baffle leather 40 is attached to the side plate 20 of the material guide chute, the position of the rotary wrench 13 is pressed and driven by hands, so that the head 131 of the rotary wrench 13 rotates to the position which is abutted to the side plate 20 of the material guide chute, and one end of the rotary pressing piece 11 abuts to press the baffle leather 40. Therefore, the blocking leather 40 can be detached and replaced quickly, and the working efficiency is high.

Referring to fig. 1, 4 and 7, fig. 4 illustrates a schematic structural view of a rotating pressing member 11 of a clamping assembly 10 according to an embodiment of the present invention, and fig. 7 illustrates a schematic structural view of a rotating wrench 13 of the clamping assembly 10 according to an embodiment of the present invention. Further, the rotating pressing member 11 includes two rotating plates 111 disposed at an interval and a second connecting member connecting the two rotating plates 111. The rotation wrench 13 is rotatably disposed between the two rotation plates 111, and the tail 133 of the rotation wrench 13 protrudes out of the two rotation plates 111. Thus, when the tail 133 of the rotating wrench 13 is driven to operate, the head 131 of the rotating wrench 13 abuts against the side plate 20 of the material guide chute or releases the side plate 20 of the material guide chute. When the head 131 of the rotating wrench 13 abuts against the side plate 20 of the material guide chute, the rotating wrench 13 fixes one end of the rotating pressing member 11, and the other end of the rotating pressing member 11 correspondingly abuts against the pressing stopper 40. Wherein, because the rotating wrench 13 is located between the two rotating plates 111, the acting force of the rotating wrench 13 on the rotating pressing piece 11 is more uniform and stable.

Referring to fig. 1 and fig. 7 again, it should be noted that the rotating wrench 13 includes a head portion 131, a connecting portion 132 and a tail portion 133 connected in sequence. The connecting portion 132 is located between the two rotating plates 111, and is rotatably connected to the rotating plates 111 by the third connecting member 14. Specifically, the third connecting member 14 is, for example, a pin, a rotating shaft, or the like, and is not limited thereto, as long as the connecting portion 132 can be rotatably disposed between the two rotating plates 111. Further, the rotating plate 111 and the connecting portion 132 are provided with rotating holes 112 corresponding to the third connecting members 14, and the third connecting members 14 pass through the rotating holes 112 to rotatably connect the rotating plate 111 and the connecting portion 132.

In an embodiment, the head portion 131, the connecting portion 132 and the tail portion 133 are an integrated structure, and the head portion 131, the connecting portion 132 and the tail portion 133 may be connected in sequence by welding, or by bolts, pins, rivets, etc., without limitation.

In one embodiment, a first included angle is provided between the head portion 131 and the connecting portion 132, and the first included angle is, for example, 90 ° to 150 °, and specifically, for example, 120 °. In addition, the connecting portion 132 and the tail portion 133 form a second included angle, and the second included angle is, for example, 90 ° to 150 °, and specifically, for example, 150 °. This saves more effort when driving the rotary wrench 13.

Referring to fig. 1, 5 and 6, fig. 5 is a side view of the first connecting member 12 of the clamping assembly 10 according to an embodiment of the present invention, and fig. 6 is a top view of the first connecting member 12 of the clamping assembly 10 according to an embodiment of the present invention. In one embodiment, one end of the first connecting member 12 is fixedly disposed on the side plate 20 of the material guide chute, and the other end of the first connecting member 12 is provided with a rotating shaft 121. The edge of the rotating plate 111 facing away from the side plate 20 is provided with a notch 113. The top of the notch 113 is adapted to the shape of the rotation shaft 121, and the rotation shaft 121 is rotatably disposed in the notch 113. So, after being fixed in first connecting piece 12 on the curb plate 20 of baffle box, axis of rotation 121 insert in breach 113 realize with rotating plate 111 normal running fit can, also can realize rotating to compress tightly piece 11 and assemble on the curb plate 20 of baffle box through first connecting piece 12 fast, the dismouting operation of clamping assembly 10 on the curb plate 20 of baffle box is comparatively convenient.

Referring to fig. 1, 5 and 6, in one embodiment, the first connecting member 12 includes a screw 122. One end of the screw rod 122 is fixedly arranged on the side plate 20 of the material guide chute, the end part of the screw rod 122 is provided with an anti-falling end 123 which is abutted against the side plate 20 of the material guide chute, and the rotating shaft 121 is arranged on the other end of the screw rod 122.

Referring to fig. 1, 5 and 6, in one embodiment, a positioning block 124 is disposed at the other end of the screw 122. The positioning block 124 is located between the two rotating plates 111, the positioning block 124 is in contact fit with the rotating plates 111, and the positioning block 124 is further provided with a threaded hole corresponding to the screw rod 122. The screw 122 is disposed in the threaded hole.

Specifically, the rotating shaft 121 is attached to the positioning block 124. Therefore, after the positioning block 124 is mounted on the screw rod 122, the rotating shaft 121 can be mounted on the screw rod 122, and the operation is convenient.

In infringement comparison, the "rotating shaft 121" may be a part of the positioning block 124, that is, the "rotating shaft 121" and the other part of the positioning block 124 are integrally formed; or a separate component that can be separated from the other parts of the positioning block 124, i.e., the rotating shaft 121 can be manufactured separately and then combined with the other parts of the positioning block 124 into a whole. As shown in fig. 5 and 6, in an embodiment, the "rotation shaft 121" is a part of the "positioning block 124" that is integrally formed.

In another embodiment, the first connecting member 12 does not need to use the screw rod 122, and the first connecting member 12 is, for example, a pin or other connecting member, and is not limited herein as long as it can be fixed to the side plate 20 of the material guide chute. Further, the other end of the first connecting member 12 is further provided with a positioning block 124. The positioning block 124 is located between the two rotating plates 111, and the positioning block 124 is in contact fit with the rotating plates 111. Thus, when the rotating pressing member 11 rotates relative to the side plate 20 of the material guide chute, the rotating plate 111 of the rotating pressing member 11 rotates relative to the positioning block 124, and the positioning block 124 facilitates the rotation of the rotating pressing member 11 to be more stable.

In one embodiment, the second connector is of an integral structure with the two rotating plates 111. Of course, the second connecting member and the rotating plate 111 may be connected in sequence by welding, or by bolts, pins, rivets, etc., for example, and are not limited herein.

Referring to fig. 2 and 3, in one embodiment, a material guiding chute includes two side plates 20, a top plate 30 connecting the two side plates 20, a baffle 40, and a clamping assembly 10 according to any of the embodiments described above. The clamping assembly 10 is mounted on the side plate 20, and the end of the rotating pressing member 11 fixes the stopper leather 40 to the side plate 20. It should be noted that both side plates 20 are provided with the retaining skin 40 and the clamping assembly 10. In addition, the number of the clamping assemblies 10 on each side plate 20 may be one, two, three or other, and is not limited herein.

When the baffle skin 40 of the guide chute needs to be detached, the tail 133 of the rotary wrench 13 is pressed and driven by hands, so that the head 131 of the rotary wrench 13 rotates to a position separated from the side plate 20 of the guide chute, and the end of the rotary pressing piece 11 correspondingly loosens the baffle skin 40, so that the baffle skin 40 can be detached; when the fixed baffle leather 40 needs to be installed, after the top of the baffle leather 40 is attached to the side plate 20 of the material guide chute, the position of the rotary wrench 13 is pressed and driven by hands, so that the head 131 of the rotary wrench 13 rotates to the position which is abutted to the side plate 20 of the material guide chute, and one end of the rotary pressing piece 11 abuts to press the baffle leather 40. Therefore, the blocking leather 40 can be detached and replaced quickly, and the working efficiency is high.

In one embodiment, the belt conveyor comprises the material guiding chute of the above embodiment, and further comprises a bracket 50, a roller 60 arranged on the bracket 50, and a conveying belt 70 positioned above the roller 60. The material guide chute and baffle 40 is positioned above the conveyor belt 70.

When the belt conveyor needs to disassemble the baffle leather 40, the tail 133 of the rotary wrench 13 is pressed and driven by hands, so that the head 131 of the rotary wrench 13 rotates to a position separated from the side plate 20 of the guide chute, and the end of the rotary pressing piece 11 correspondingly loosens the baffle leather 40, so that the baffle leather 40 can be disassembled; when the fixed baffle leather 40 needs to be installed, after the top of the baffle leather 40 is attached to the side plate 20 of the material guide chute, the position of the rotary wrench 13 is pressed and driven by hands, so that the head 131 of the rotary wrench 13 rotates to the position which is abutted to the side plate 20 of the material guide chute, and one end of the rotary pressing piece 11 abuts to press the baffle leather 40. Therefore, the blocking leather 40 can be detached and replaced quickly, and the working efficiency is high.

Further, the belt conveyor further includes angle steel 80 disposed between the rotating pressing member 11 and the stopper leather 40. The end of the rotary pressing member 11 presses the stopper leather 40 through the angle iron 80. The angle steel 80 is arranged along the transverse direction of the side plate 20, so that the whole top of the baffle skin 40 is pressed and fixed on the side plate 20 of the guide chute, the baffle skin 40 is well fixed, and meanwhile, the phenomenon that the baffle skin 40 is damaged due to local stress is avoided. In addition, specifically, the end of the rotating pressing member 11 is provided with a groove 114 adapted to the angle iron 80. The groove 114 enables the end of the rotating pressing member 11 to hold the angle iron 80 more stably. When the head 131 of the rotary wrench 13 rotates to a position where the head abuts against the side plate 20 of the material guide chute, the end of the rotary pressing member 11 abuts against the angle iron 80, and the angle iron 80 located in the groove 114 is forced to tightly clamp and fix the stopper leather 40, thereby preventing the stopper leather 40 from falling.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.