CN112813569A

CN112813569A - Shuttle sliding track for loom

Info

Publication number: CN112813569A
Application number: CN202011644060.9A
Authority: CN
Inventors: 姜英飞
Original assignee: Xiamen Zhengmengmai Textile Co ltd
Current assignee: Xiamen Zhengmengmai Textile Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-05-18

Abstract

The invention relates to the technical field of textile machinery, in particular to a shuttle sliding track for a loom, which comprises a base and a shuttle assembly, wherein the upper surface of the base is fixedly connected with a lower track, the upper surface of the lower track is fixedly connected with a transverse plate, the upper surface of the transverse plate is fixedly connected with an upper track, a fastening assembly is fixedly connected between the transverse plates, the shuttle assembly is movably connected inside the transverse plate, a clamping assembly is fixedly connected above the shuttle assembly, and a rolling assembly is movably connected between the upper track and the lower track. The invention increases the stability of the shuttle by arranging the matching of the dovetail sliding groove and the sliding block, further reduces the friction force between the shuttle and the roller by matching the bearing and the roller, further improves the rotating efficiency of the shuttle, ensures that the shuttle has more stability when rotating, and is more convenient to overhaul and maintain equipment by an assembled structure.

Description

Shuttle sliding track for loom

Technical Field

The invention relates to the technical field of textile machinery, in particular to a shuttle sliding track for a loom.

In the development process of the modern textile industry, various shuttleless looms, such as rapier looms, projectile looms, circular looms and the like appear, wherein the circular looms are used for weaving cylindrical fabrics, and the sliding rails of shuttles play an important role in the cylindrical fabrics in the processing process and can directly influence the working efficiency of equipment.

The invention discloses a plastic circular loom shuttle and a track structure thereof, which comprises a lower track, a rolling bearing, a shuttle, a screw, a shuttle roller and an upper track, and is characterized in that the upper plane of the lower track is provided with grooves with two inclined planes or arc surfaces which are downwards concave, and the lower plane of the upper track is also provided with grooves with two inclined planes or arc surfaces which are upwards concave; the invention has the advantages of low energy consumption, low noise, difficult broken warp yarn, no shuttle roller falling off from the upper and lower tracks to cause shuttle flying fault, the eccentric sleeve arranged in the middle of the shuttle roller, adjustable wheel distance after the shuttle roller is worn, and prolonged service life of the shuttle roller.

When using the slip track to carry out the motion of shuttle, its structure is too simple, the risk of derailing when leading to the fact the high-speed rotation of shuttle easily, and then cause the influence to the personal safety, and the connected mode friction of current runner and pivot is arrived, at the in-process that uses, produce too big frictional force to the shuttle easily, lead to its rotation efficiency to reduce, its current structure is mostly monolithic structure, the dismantlement of the equipment of being not convenient for is overhauld, and then causes the overhaul of the equipments difficulty in later stage, and the part is changed complicacy.

Therefore, there is a need to design a sliding rail of shuttle for loom to solve the above problems.

Disclosure of Invention

The invention aims to provide a shuttle sliding track for a loom, which aims to solve the problems of poor stability and inconvenience in disassembly and maintenance when a shuttle rotates, which are provided by the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: a shuttle sliding track for a loom comprises a base and a shuttle assembly, wherein the upper surface of the base is fixedly connected with a lower track, the upper surface of the lower track is fixedly connected with a transverse plate, the upper surface of the transverse plate is fixedly connected with an upper track, a fastening assembly is fixedly connected between the transverse plates and comprises first support lugs, the first support lugs are fixedly connected to the outer wall of the transverse plate, the left sides of the first support lugs are fixedly connected with second support lugs, the second support lugs are fixedly connected to the outer wall of the transverse plate, the upper part and the lower part of each first support lug are movably connected with a movable frame, the left sides of the movable frames are fixedly connected with a threaded barrel, the inner part of the threaded barrel is movably connected with a threaded rod, the right side of the threaded rod is fixedly connected with a pressing plate, the bottom edge of the transverse plate is fixedly connected with a skirt edge, and the skirt edge is, the inside swing joint of diaphragm has the shuttle subassembly, the top fixedly connected with centre gripping subassembly of shuttle subassembly, swing joint has the rolling subassembly between last track and the lower track, the rolling subassembly includes the straight axle, straight axle fixed connection is at last orbital lower surface, the outer wall fixed swing joint of straight axle has first cylinder, the below of first cylinder is provided with the fixed block, the forked tail spout has been seted up on the right side of fixed block, the inside fixedly connected with second cylinder of forked tail spout, the below swing joint of forked tail spout has the third cylinder, the upper and lower both ends all fixedly connected with end cover of straight axle, the internal surface fixedly connected with ball bearing of first cylinder, the movable cover has been seted up to the top of going up the track.

Preferably, the base is circular structure, it is provided with four groups to go up the track, and is the circular arc structure, constitutes circular structure each other, track and diaphragm also are provided with four groups down, are the concatenation formula structure, it constitutes C shape structure with track and diaphragm down to go up the track.

Preferably, the adjustable shelf is swivelling joint with first journal stirrup, the clamp plate is circular structure, the left side of second journal stirrup is fixed to be seted up flutedly, the right side of second journal stirrup is provided with the inserted sheet, the left side of first journal stirrup is provided with flutedly.

Preferably, the shuttle subassembly includes the shuttle body, the both ends of the shuttle body are the fixedly connected with stopper all, the lower fixed surface of the shuttle body is connected with the forked tail slider, the top swing joint of forked tail slider has the shuttle wheel, the left side fixedly connected with lead frame of the shuttle body, the right side fixedly connected with support frame of lead frame.

Preferably, the clamping component comprises a telescopic rod, a first plug-in mouth is fixedly connected to the right side of the telescopic rod, a bolt is inserted into the right side of the first plug-in mouth in a splicing mode, a wire tube is sleeved outside the bolt, a second plug-in mouth is inserted into the right side of the bolt in a splicing mode, a spring is fixedly connected to the right side of the second plug-in mouth, and a fixing groove is fixedly connected to the right side of the spring.

Preferably, first spigot and second spigot are the trapezoidal structure, and inside is provided with the recess, the flexible post of right side fixedly connected with of second spigot, the flexible post of second spigot is the plug-in connection with the fixed slot.

Preferably, the forked tail spout is the swallow-tail shape structure, first cylinder, second cylinder and third cylinder are the rotation with the straight axle and are connected, the straight axle is provided with two sets ofly, the upper and lower both ends of straight axle are the screw thread form, the lower surface center of end cover is provided with the screw hole

Preferably, the ball bearing comprises an inner bearing, the outer wall of the inner bearing is movably connected with a fine steel ball, the outer part of the fine steel ball is movably connected with an outer bearing, the outer wall of the outer bearing is fixedly connected with a first roller, the outer wall of the inner bearing is provided with an arc-shaped groove, and the inner wall of the outer bearing is provided with an arc-shaped groove.

Preferably, the movable cover comprises a cover body, a hinge is fixedly connected to the right side of the cover body, the other end of the hinge is fixedly connected to the upper surface of the upper rail, a gasket is arranged between the cover body and the fastening bolt, and a rubber pad is fixedly connected to the lower surface of the cover body.

Preferably, the cover body is rotatably connected with the upper rail through a hinge, the hinge is fixedly connected with the upper surfaces of the cover body and the upper rail through a countersunk bolt, the rubber pad is of a flexible structure and a circular structure,

compared with the prior art, the invention has the beneficial effects that:

1. this shuttle slip track is through the gyro wheel that sets up between the upper and lower track, and inside setting through antifriction bearing can reduce its frictional force that produces when rotating by a wide margin, and then improve the rotation efficiency of shuttle, and the cooperation through slide rail and slider can realize the spacing fixed to the shuttle, can realize the fixed direction to the shuttle through the effect of its card with, and can further play the fixed to the shuttle through the setting of stopper, stability when can effectual improvement shuttle rotates, prevent its condition that the derailment appears, the security of increase equipment.

2. This shuttle slip track passes through the combination formula design, make things convenient for orbital installation, and the installation of the shuttle of being convenient for, the rotary type apron that sets up in addition plays the fixed to the straight axle, and can realize the dismantlement to the straight axle, the convenience is to the installation of straight axle, the change and the maintenance of the straight axle of being convenient for, make things convenient for the use in later stage, the later stage of being convenient for overhauls equipment and the change of part, and through the combination formula installation, be convenient for installation and change, can carry out local change when the device damages, materials and budget have been saved.

Drawings

FIG. 1 is a schematic top view of the present invention;

FIG. 2 is a schematic cross-sectional view of the rolling assembly of the present invention;

FIG. 3 is an enlarged view of the structure A in FIG. 2 according to the present invention;

FIG. 4 is a schematic top view of the shuttle assembly of the present invention;

FIG. 5 is a schematic diagram of a right-side view of the rolling assembly of the present invention;

FIG. 6 is a schematic cross-sectional view of a ball bearing according to the present invention;

FIG. 7 is a front view of the fastener assembly of the present invention;

figure 8 is a schematic view of the right side construction of the shuttle assembly of the present invention.

FIG. 9 is a cross-sectional view of the threaded cartridge connection of the present invention.

In the figure: 1. a base; 2. an upper rail; 3. a fastening assembly; 31. a first lug; 32. a second lug; 33. a movable frame; 34. pressing a plate; 35. a threaded barrel; 36. a threaded rod; 37. a hexagon bolt; 38. a skirt edge; 4. a shuttle assembly; 41. a shuttle body; 42. a dovetail slide block; 43. a shuttle wheel; 44. a lead frame; 45. a support frame; 46. a limiting block; 5. a clamping assembly; 51. a telescopic rod; 52. a first spigot; 53. a bolt; 54. a yarn drum; 55. a second spigot; 56. a spring; 57. fixing grooves; 6. a rolling component; 61. a straight shaft; 62. a first drum; 63. a second drum; 64. a third drum; 65. a dovetail chute; 66. an end cap; 67. a fixed block; 7. a ball bearing; 71. an inner bearing; 72. fine steel balls; 73. an outer bearing; 8. a lower rail; 9. a transverse plate; 10. a movable cover; 101. a cover body; 102. a hinge; 103. fastening a bolt; 104. a gasket; 105. and (7) a rubber pad.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-8, an embodiment of the present invention:

a shuttle sliding track for a loom comprises a base 1 and a shuttle component 4, wherein the upper surface of the base 1 is fixedly connected with a lower track 8, the upper surface of the lower track 8 is fixedly connected with a transverse plate 9, the upper surface of the transverse plate 9 is fixedly connected with an upper track 2, a fastening component 3 is fixedly connected between the transverse plates 9, the fastening component 3 comprises a first lug 31, the first lug 31 is fixedly connected on the outer wall of the transverse plate 9, the left side of the first lug 31 is fixedly connected with a second lug 32, the second lug 32 is fixedly connected on the outer wall of the transverse plate 9, the upper part and the lower part of the first lug 31 are movably connected with a movable frame 33, the left side of the movable frame 33 is fixedly connected with a thread cylinder 35, the inside of the thread cylinder 35 is movably connected with a threaded rod 36, the right side of the threaded rod 36 is fixedly connected with a pressing plate 34, the bottom edge of the transverse plate 9 is fixedly connected with, the realization is to the fastening installation of diaphragm 9, through rotating adjustable shelf 33, places clamp plate 34 in the left side of second journal stirrup 32, further through rotating threaded rod 36, realizes the lift of clamp plate 34, further can be through the extrusion of clamp plate 34 to second journal stirrup 32, realizes the fastening to second journal stirrup 32 and first journal stirrup 31, is circular structure with the installation of diaphragm 9, further installs it in the top of base 1 through hexagon bolt 37.

The inside swing joint of diaphragm 9 has shuttle subassembly 4, the top of shuttle subassembly 4 is fixedly connected with centre gripping subassembly 5, swing joint has rolling subassembly 6 between upper track 2 and lower track 8, rolling subassembly 6 includes straight axle 61, straight axle 61 is fixedly connected with the lower surface of upper track 2, the outer wall of straight axle 61 is fixedly and movably connected with first cylinder 62, the below of first cylinder 62 is provided with fixed block 67, the right side of fixed block 67 is provided with forked tail spout 65, the inside of forked tail spout 65 is fixedly connected with second cylinder 63, the below of forked tail spout 65 is movably connected with third cylinder 64, the upper and lower both ends of straight axle 61 are all fixedly connected with end cover 66, the internal surface of first cylinder 62 is fixedly connected with ball bearing 7, can realize the rotation of first cylinder 62 and second cylinder 63 with third cylinder 64 through ball bearing 7, further can play the fixed to shuttle subassembly 4 through the shape of forked tail spout 65, prevent it from becoming flexible, increase its stable effect, the upper orbit 2 top is seted up movable cover 10.

Base 1 is circular structure, and last track 2 is provided with four groups, and is the circular arc structure, constitutes circular structure each other, and lower track 8 and diaphragm 9 also are provided with four groups, are the concatenation formula structure, and last track 2 constitutes C shape structure with lower track 8 and diaphragm 9, realizes orbital equipment through the assembled structure, is convenient for install, and makes things convenient for the later stage to orbital maintenance.

The adjustable shelf 33 is swivelling joint with first journal stirrup 31, and clamp plate 34 is circular structure, and the left side of second journal stirrup 32 is fixed to be seted up flutedly, and the right side of second journal stirrup 32 is provided with the inserted sheet, and the left side of first journal stirrup 31 is provided with the recess, increases effect of connection between them, plays fastening effect.

Shuttle subassembly 4 includes shuttle 41, the both ends of shuttle 41 are all fixedly connected with stopper 46, the lower surface fixedly connected with forked tail slider 42 of shuttle 41, forked tail slider 42's top swing joint has the shuttle wheel 43, the left side fixedly connected with lead frame 44 of shuttle 41, the right side fixedly connected with support frame 45 of lead frame 44, mutually support through forked tail slider 42 and forked tail spout 65, stability when increasing shuttle subassembly 4 and rotating, further play limiting displacement through stopper 46, prevent that sideslip and derail from appearing in shuttle subassembly 4.

Centre gripping subassembly 5 includes telescopic link 51, the first mouth 52 of inserting of right side fixedly connected with of telescopic link 51, the right side of first mouth 52 of inserting is pegged graft and is had bolt 53, silk thread section of thick bamboo 54 has been cup jointed to bolt 53's outside, it has second mouth 55 of inserting to peg graft on bolt 53's right side, the right side fixedly connected with spring 56, spring 56's right side fixedly connected with fixed slot 57, can realize installing the silk thread section of thick bamboo 54 of different length through telescopic link 51's flexible characteristic, overlap silk thread section of thick bamboo 54 in bolt 53's outside during the installation, insert the inside at second mouth 55 with bolt 53's right-hand member earlier, further elasticity through spring 56 can play the effect of supporting and fastening it, further insert the inside at first mouth 52 with bolt 53's the other end.

First spigot 52 is trapezoidal structure with second spigot 55, and inside is provided with the recess, is convenient for to the grafting of bolt 53, and the flexible post of right side fixedly connected with of second spigot 55, the flexible post of second spigot 55 and fixed slot 57 are the plug-in connection and play its flexible characteristic through spring 56, can play the fastening effect to a silk thread section of thick bamboo 54.

Dovetail chute 65 is the dovetail structure, and first cylinder 62, second cylinder 63 and third cylinder 64 are to rotate with straight axle 61 and are connected, and straight axle 61 is provided with two sets ofly, and the upper and lower both ends of straight axle 61 are the screw thread form, and the lower surface center of end cover 66 is provided with the screw hole, plays the fastening to straight axle 61, and can play the fixed to dovetail slide 42 through dovetail chute 65, further plays the fixed to shuttle subassembly 4.

Ball bearing 7 includes inner bearing 71, inner bearing 71's outer wall swing joint has smart steel ball 72, the outside swing joint of smart steel ball 72 has outer bearing 73, the first cylinder 62 of outer bearing 73's outer wall fixedly connected with, the arc recess has been seted up to inner bearing 71's outer wall, the arc recess has been seted up to outer bearing 73's inner wall, characteristic through smart steel ball 72, can be through inner bearing 71 and outer bearing 73's rotation, reduce the frictional force of straight axle 61 and first cylinder 62, and then promote shuttle subassembly 4's rotation efficiency.

The movable cover 10 comprises a cover body 101, a hinge 102 is fixedly connected to the right side of the cover body 101, the other end of the hinge 102 is fixedly connected to the upper surface of the upper rail 2, a gasket 104 is arranged between the cover body 101 and a fastening bolt 103, and a rubber pad 105 is fixedly connected to the lower surface of the cover body 101, so that the cover body 101 can rotate, and the straight shaft 61 can be further conveniently overhauled and replaced.

Lid 101 is rotation connection through hinge 102 and last track 2, and hinge 102 makes things convenient for the rotation of lid 101 through countersunk head bolt fixed connection at lid 101 and the upper surface of last track 2, and rubber pad 105 is flexible structure, and you can play the extrusion to end cover 66, further realizes the fastening to end cover 66 through the extrusion, and rubber pad 105 is circular structure.

The working principle is as follows: according to the invention, the installation is carried out manually, firstly, the transverse plate 9 is assembled, further, the fastening assembly 3 is used for installation and fixation, further, the pressing plate 34 is rotated through the rotating threaded rod 36 to realize the movement of the pressing plate 34, further, the pressing plate 34 is used for realizing the extrusion of the second support lug 32, further, the first support lug 31 and the second support lug 32 are fastened, the assembly of the transverse plate 9 is realized, the upper rail 2 and the lower rail 8 are further fastened, the rotating effect of the rolling assembly 6 is further detected, the part with poor rotating performance is replaced, the cover body 101 can be opened by controlling the tightness of the fastening bolt 103, further, the straight shaft 61 can be replaced by rotating the end cover 66, when the replacement is finished, the cover body 101 is further fastened, the end cover 66 is extruded by the rubber gasket 105 during the fastening, and the stability of the cover body is ensured.

Further cooperation through shuttle subassembly 4 and rolling subassembly 6, realize the rotation of shuttle subassembly 4, and the cooperation through forked tail slider 42 and forked tail spout 65, the stability of shuttle subassembly 4 has been increased, further realize further improving its pivoted stability through stopper 46, can reduce the frictional force of shuttle subassembly 4 and rolling subassembly 6 through ball bearing 7's setting simultaneously, further improve the rotation efficiency of shuttle subassembly 4, in operation, install the inside at centre gripping subassembly 5 with silk thread section of thick bamboo 54, and pass the lead clamp of lead frame 44 tip with the silk thread, further can realize the traction to shuttle subassembly 4 through external power, and then realize the circular motion of shuttle subassembly 4.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A shuttle sliding track for loom, includes base (1) and shuttle subassembly (4), its characterized in that: the upper surface of the base (1) is fixedly connected with a lower rail (8), the upper surface of the lower rail (8) is fixedly connected with a transverse plate (9), the upper surface of the transverse plate (9) is fixedly connected with an upper rail (2), a fastening component (3) is fixedly connected between the transverse plates (9), the fastening component (3) comprises a first lug (31), the first lug (31) is fixedly connected to the outer wall of the transverse plate (9), the left side of the first lug (31) is fixedly connected with a second lug (32), the second lug (32) is fixedly connected to the outer wall of the transverse plate (9), the upper and lower movable connections of the first lug (31) are provided with a movable frame (33), the left side of the movable frame (33) is fixedly connected with a threaded cylinder (35), the inner movable connection of the threaded cylinder (35) is provided with a threaded rod (36), and the right side of the threaded cylinder (36) is fixedly connected with a pressing plate (34), the bottom edge of the transverse plate (9) is fixedly connected with a skirt edge (38), the skirt edge (38) is fixedly connected to the upper surface of the base (1) through a hexagon bolt (37), the inside of the transverse plate (9) is movably connected with a shuttle component (4), the upper side of the shuttle component (4) is fixedly connected with a clamping component (5), a rolling component (6) is movably connected between the upper track (2) and the lower track (8), the rolling component (6) comprises a straight shaft (61), the straight shaft (61) is fixedly connected to the lower surface of the upper track (2), the outer wall of the straight shaft (61) is fixedly and movably connected with a first roller (62), a fixed block (67) is arranged below the first roller (62), a dovetail sliding groove (65) is formed in the right side of the fixed block (67), and a second roller (63) is fixedly connected to the inside of the dovetail sliding groove (65), the lower part swing joint of forked tail spout (65) has third cylinder (64), the upper and lower both ends of straight shaft (61) are all fixedly connected with end cover (66), the internal surface fixed connection of first cylinder (62) has ball bearing (7), movable cover (10) have been seted up to the top of going up track (2).

2. A shuttle sliding track for a loom according to claim 1, wherein: base (1) is circular structure, it is provided with four groups to go up track (2), and is the circular arc structure, constitutes circular structure each other, track (8) and diaphragm (9) also are provided with four groups down, are the concatenation formula structure, it constitutes C shape structure with lower track (8) and diaphragm (9) to go up track (2).

3. A shuttle sliding track for a loom according to claim 1, wherein: the adjustable shelf is characterized in that the movable shelf (33) is in rotary connection with the first support lug (31), the pressing plate (34) is of a circular structure, the left side of the second support lug (32) is fixed with a groove, the right side of the second support lug (32) is provided with an insertion piece, and the left side of the first support lug (31) is provided with a groove.

4. A shuttle sliding track for a loom according to claim 1, wherein: shuttle subassembly (4) are including shuttle body (41), both ends of shuttle body (41) are all fixedly connected with stopper (46), the lower surface fixedly connected with forked tail slider (42) of shuttle body (41), the top swing joint of forked tail slider (42) has shuttle wheel (43), the left side fixedly connected with lead frame (44) of shuttle body (41), the right side fixedly connected with support frame (45) of lead frame (44).

5. A shuttle sliding track for a loom according to claim 1, wherein: the clamping assembly (5) comprises a telescopic rod (51), a first plug-in mouth (52) is fixedly connected to the right side of the telescopic rod (51), a bolt (53) is connected to the right side of the first plug-in mouth (52) in an inserting mode, a wire tube (54) is sleeved outside the bolt (53), a second plug-in mouth (55) is connected to the right side of the bolt (53) in an inserting mode, a spring (56) is fixedly connected to the right side of the second plug-in mouth (55), and a fixing groove (57) is fixedly connected to the right side of the spring (56).

6. A shuttle sliding track for a loom according to claim 5, characterized in that: first inserting nozzle (52) is the trapezoidal structure with second inserting nozzle (55), and inside is provided with the recess, the flexible post of right side fixedly connected with of second inserting nozzle (55), the flexible post and fixed slot (57) of second inserting nozzle (55) are the plug-in connection.

7. A shuttle sliding track for a loom according to claim 1, wherein: dovetail chute (65) are dovetail structure, first cylinder (62), second cylinder (63) and third cylinder (64) are to rotate with straight axle (61) and are connected, straight axle (61) are provided with two sets ofly, the upper and lower both ends of straight axle (61) are the screw thread form, the lower surface center of end cover (66) is provided with the screw hole.

8. A shuttle sliding track for a loom according to claim 1, wherein: ball bearing (7) include inner bearing (71), the outer wall swing joint of inner bearing (71) has smart steel ball (72), the outside swing joint of smart steel ball (72) has outer bearing (73), the first cylinder (62) of outer wall fixedly connected with of outer bearing (73), the arc recess has been seted up to the outer wall of inner bearing (71), the arc recess has been seted up to the inner wall of outer bearing (73).

9. A shuttle sliding track for a loom according to claim 1, wherein: the movable cover (10) comprises a cover body (101), a hinge (102) is fixedly connected to the right side of the cover body (101), the other end of the hinge (102) is fixedly connected to the upper surface of the upper rail (2), a gasket (104) is arranged between the cover body (101) and the fastening bolt (103), and a rubber pad (105) is fixedly connected to the lower surface of the cover body (101).

10. A shuttle sliding track for a loom according to claim 9, wherein: lid (101) are rotation connection through hinge (102) and last track (2), hinge (102) are through countersunk head bolt fixed connection at the upper surface of lid (101) and last track (2), rubber pad (105) are flexible structure, rubber pad (105) are circular structure.