High-stability highway subgrade construction device

Abstract

The invention belongs to the technical field of roadbed construction devices, and particularly relates to a high-stability highway roadbed construction device which comprises a land leveler and a bulldozing plate mounted on the land leveler. A cleaning mechanism is arranged on the land leveler, the cleaning mechanism comprises an electric push rod fixedly installed on the land leveler, a connecting frame is fixedly installed at the end of an output rod of the electric push rod, and a servo motor is fixedly installed in the connecting frame; by means of the designed structure, impurities on the bulldozing plate are rapidly removed, and the situation that due to the fact that the impurities are wound and attached to the bulldozing plate, the resistance of the bulldozing plate is sharply increased, power is wasted, and efficiency is reduced is effectively avoided. And meanwhile, the service life of the bulldozing plate can be prolonged through timely cleaning, and the stability and efficiency of equipment are improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of roadbed construction devices, in particular to a high-stability roadbed construction device. BACKGROUND

[0002] The grader is the core "site finishing and fine operation equipment" in highway infrastructure construction, and the core function is to realize site leveling, roadbed finishing, slope excavation and other processes through precise control of the working device, to provide a high-precision operation surface for subsequent construction (such as roadbed compaction and pavement paving). The grader is also called "grader scraper", and its core advantage is "high-precision leveling", which can realize multi-dimensional finishing of "plane, inclined plane and curved surface", and is the key equipment for the whole process of "site preparation, roadbed forming and slope finishing" in roadbed construction. When the grader completes the cleaning and preliminary bulldozing of impurities, the bulldozing plate is used to clean and level the roadbed surface by changing the angle of the bulldozing plate.

[0003] In roadbed construction, the bulldozing plate of the grader often contacts with cohesive soil (such as silty clay and red clay) or wet soil (caused by rain season and high underground water level), and the characteristics of such fillers will cause them to directly adhere to the bulldozing plate. In the roadbed cleaning stage, the bulldozing plate of the grader needs to push away surface vegetation (weeds, tree roots, vines), construction waste (broken concrete blocks, plastic bags, gravel), and these impurities will adhere to the bulldozing plate by winding and piling up. These adhered impurities will cause the bulldozing plate resistance to increase sharply, resulting in power waste and efficiency reduction, and the adhered impurities will also affect the service life of the bulldozing plate if not cleaned in time, causing the bulldozing plate to be difficult to use for a long time and efficiently and stably.

[0004] Therefore, the application provides a high-stability roadbed construction device. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem raised in the background art.

[0006] The technical scheme adopted by the application to solve the technical problem is: the high-stability roadbed construction device comprises a grader and a bulldozing plate installed on the grader; the grader is provided with a cleaning mechanism, the cleaning mechanism comprises an electric push rod fixedly installed on the grader, an output rod end of the electric push rod is fixedly installed with a connecting frame, a servo motor is fixedly installed in the inside of the connecting frame, an output end of the servo motor is fixedly installed with a lead screw, one end of the lead screw is connected with the connecting frame, and a movable block is movably connected to the surface of the lead screw; one end of the movable block is fixedly installed with a connecting rod, and a subsequent scraper is fixedly installed at the bottom of the connecting rod.

[0007] Further, the both sides of the land leveler are provided with supporting mechanisms, the supporting mechanism comprises a supporting column fixedly connected with the land leveler, a sliding column is slidably connected in the supporting column, and one end of the sliding column is fixedly connected with a connecting frame.

[0008] Further, a hollow corrugated pipe is fixedly installed between the connecting frame and the land leveler, and the corrugated pipe covers the output rod of the electric push rod.

[0009] Further, a spraying mechanism is arranged in the connecting frame, the spraying mechanism comprises a plurality of rubber boxes fixedly installed in the connecting frame, one side of the rubber box is fixedly installed with a liquid spraying pipe in communication with the inside and provided with a check valve, and a top plate is arranged on the top of the movable block.

[0010] Further, the top plate is arc-shaped, and a plurality of rolling columns made of rubber are rotatably connected to the top of the top plate.

[0011] Further, a receiving groove is formed in the inside of the movable block, a sliding plate is slidably connected in the receiving groove, the top of the sliding plate is fixedly connected with the top plate, a baffle is fixedly installed in the receiving groove, a magnetic block is fixedly installed on the bottom of the sliding plate, and an electromagnet is fixedly installed in the receiving groove.

[0012] Further, a storage mechanism is arranged on the connecting frame, the storage mechanism comprises a liquid storage box fixedly installed on the connecting frame, one side of the liquid storage box is fixedly installed with a plurality of pipes in communication with the inside and provided with check valves, and the inside of the plurality of rubber boxes is respectively in communication with the plurality of pipes.

[0013] Further, an auxiliary mechanism is arranged on the bulldozing plate, the auxiliary mechanism comprises a rectangular frame fixedly installed on the top of the bulldozing plate and hollow, the sliding column is sealingly slid in the supporting column, the supporting column and the rectangular frame are communicated through a connecting pipe, a plurality of air outlets are formed in the bottom of the rectangular frame, and a filter screen is fixedly installed in the air outlet.

[0014] Further, a swing rod is rotatably connected in the air outlet of the rectangular frame through a torsion spring, one end of the swing rod is fixedly installed with a striking plate, and a plurality of convex blocks made of rubber are fixedly installed on the bottom of the striking plate.

[0015] The beneficial effects of the present application are as follows: 1. The high-stability highway roadbed construction device of the present application, through the reciprocating movement of the servo motor and the screw rod with the scraper, realizes efficient cleaning of the bulldozing plate. At the same time, the support column and the sliding column serve as auxiliary support and connection frame, ensuring that the connection frame can maintain high efficiency and stability when moving up and down. The design of the bellows covering the output rod of the electric push rod is to reduce the impact of impurities on the output rod, ensuring that the output rod of the electric push rod can be used stably and for a long time. The designed structure realizes quick removal of impurities on the bulldozing plate, effectively avoiding impurities winding and adhering to the bulldozing plate, which in turn causes the bulldozing plate resistance to increase sharply, resulting in power waste and efficiency decline. At the same time, timely cleaning can also prolong the service life of the bulldozing plate and improve the stability and efficiency of the equipment.

[0016] 2. The high-stability highway roadbed construction device of the present application, as the movable block continuously moves, it continuously extrudes the rubber box with the moved top plate and rolling column, so that the liquid in the rubber box is sprayed to the surface of the bulldozing plate through the liquid spraying pipe. The sprayed liquid assists the scraper in cleaning the surface of the bulldozing plate, thereby loosening the impurities adhering to the bulldozing plate, facilitating subsequent cleaning of the bulldozing plate by the scraper. When the top plate no longer extrudes the rubber box, the rubber box will reset under the action of its own elastic potential energy. The rubber box during resetting will suck the liquid in the liquid storage box into the rubber box through the conduit, facilitating the top plate to extrude the rubber box again to spray the liquid inside when resetting. If the top plate does not need to extrude the rubber box when resetting, the electromagnet can be powered off. The sliding plate will reset with the magnetic block, top plate and rolling column, that is, the top plate will not extrude the rubber box when resetting.

[0017] 3. The high-stability highway roadbed construction device of the present application, by installing the connecting pipe, the bulldozing plate can be effectively blocked when pushing impurities, and the impurities will not jump over the bulldozing plate when there are more and more impurities. At the same time, when the electric push rod moves upward with the connecting frame and other components, the sliding column will also slide in the support column, thereby extruding the gas in the support column, so that the gas in the support column enters the rectangular frame through the connecting pipe, and is sprayed to the bulldozing plate through the gas outlet hole of the rectangular frame, realizing the function of auxiliary cleaning of the bulldozing plate. It should be noted that the filter screen plays a role in reducing the entry of impurities into the rectangular frame. When the gas is sprayed out through the gas outlet hole, it will push the impact plate and the boss, so that the impact plate and the boss rotate to the filter screen through the swing rod, thereby rotating and impacting the filter screen, so that the filter screen vibrates, playing a role in dredging the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0018] The present application will be further described below in conjunction with the drawings.

[0019] Figure 1 is a perspective view of the land leveler in the present application; Figure 2It is the structure schematic diagram of the grader from the bottom of the invention; Figure 3 It is the structure schematic diagram of the connecting frame from the section of the invention; Figure 4 It is the structure schematic diagram of the connecting frame from the section of the invention; Figure 5 It is the structure schematic diagram of the connecting frame from the section of the invention; Figure 6 It is the structure schematic diagram of the connecting frame from the section of the invention.

[0020] In the figure: 1, grader; 2, bulldozing plate; 10, cleaning mechanism; 11, electric push rod; 12, connecting frame; 13, servo motor; 14, screw rod; 15, movable block; 16, connecting rod; 17, scraper; 20, supporting mechanism; 21, supporting column; 22, sliding column; 30, corrugated pipe; 40, spraying mechanism; 41, rubber box; 42, liquid spraying pipe; 43, top plate; 44, rolling column; 45, storage groove; 46, sliding plate; 47, magnetic block; 48, electromagnet; 49, baffle; 50, storage mechanism; 51, liquid storage box; 52, conduit; 60, auxiliary mechanism; 61, connecting pipe; 62, rectangular frame; 63, air outlet; 64, filter screen; 65, swing rod; 66, impact plate; 67, boss. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0022] As Figures 1 to 6 shown, the high-stability highway roadbed construction device of the embodiment of the present application comprises a grader 1 and a bulldozing plate 2 installed on the grader 1; the grader 1 is provided with a cleaning mechanism 10, which comprises an electric push rod 11 fixedly installed on the grader 1, a connecting frame 12 fixedly installed at the output rod end of the electric push rod 11, a servo motor 13 fixedly installed inside the connecting frame 12, a screw rod 14 fixedly installed at the output end of the servo motor 13, a movable block 15 movably connected to the surface of the screw rod 14, one end of the movable block 15 fixedly installed with a connecting rod 16, and the bottom of the connecting rod 16 fixedly installed with a subsequent scraper 17.

[0023] Specifically, the both sides of the land leveler 1 are provided with support mechanisms 20, the support mechanism 20 comprises a support column 21 fixedly connected with the land leveler 1, a sliding column 22 is slidably connected in the support column 21, and one end of the sliding column 22 is fixedly connected with the connecting frame 12. A hollow corrugated pipe 30 is fixedly installed between the connecting frame 12 and the land leveler 1, and the corrugated pipe 30 covers the output rod of the electric push rod 11.

[0024] When the land leveler 1 is working, after the dozer blade 2 completes the dozing operation, a large amount of impurities will adhere to the surface of the dozer blade 2, at this time, the electric push rod 11 is started to make the output rod of the electric push rod 11, the connecting frame 12 and the scraper 17 and other components move downward, and the one end of the arc-shaped scraper 17 is attached to the surface of the arc-shaped dozer blade 2. Then the servo motor 13 in the connecting frame 12 is started, the servo motor 13 moves the movable block 15, the connecting rod 16 and the scraper 17 through the lead screw 14, and then the arc-shaped scraper 17 wipes and cleans the arc-shaped surface of the dozer blade 2. Through the reciprocating motion of the servo motor 13 and the lead screw 14 with the scraper 17, the efficient cleaning of the dozer blade 2 is realized. At the same time, the support column 21 and the sliding column 22 assist in supporting the connecting frame 12, so that the connecting frame 12 can move up and down efficiently and stably. The output rod of the electric push rod 11 is covered by the corrugated pipe 30 to reduce the influence of impurities on the output rod, so that the output rod of the electric push rod 11 can be used stably and for a long time.

[0025] The above-mentioned structure realizes the rapid removal of impurities on the dozer blade 2, effectively avoids the impurities winding and adhering to the dozer blade 2, and then causes the dozer blade 2 to have a sharp increase in resistance, resulting in power waste and efficiency decline. At the same time, timely cleaning can also prolong the service life of the dozer blade 2 and improve the stability and efficiency of the equipment.

[0026] The connecting frame 12 is provided with a spraying mechanism 40, the spraying mechanism 40 comprises a plurality of rubber boxes 41 fixedly installed in the connecting frame 12, one side of the rubber box 41 is fixedly installed with a liquid spraying pipe 42 which is in communication with the inside and has a one-way valve, and the top of the movable block 15 is provided with a top plate 43. The top plate 43 is arc-shaped, and a plurality of rolling columns 44 made of rubber are rotatably connected to the top of the top plate 43. The inside of the movable block 15 is provided with a receiving groove 45, the inside of the receiving groove 45 is slidably connected with a sliding plate 46, the top of the sliding plate 46 is fixedly connected with the top plate 43, and the receiving groove 45 is fixedly installed with a baffle 49; the bottom of the sliding plate 46 is fixedly installed with a magnetic block 47, and the receiving groove 45 is fixedly installed with an electromagnet 48.

[0027] Specifically, the connecting frame 12 is provided with a storage mechanism 50, which includes a liquid storage box 51 fixedly installed on the connecting frame 12. One side of the liquid storage box 51 is fixedly provided with a plurality of conduits 52 in communication with the inside and provided with one-way valves. The plurality of conduits 52 are respectively in communication with the inside of the plurality of rubber boxes 41.

[0028] When the movable block 15 moves with the scraper 17 to clean the surface of the bulldozing plate 2, the electromagnet 48 in the receiving groove 45 is started to make the electromagnet 48 and the magnetic block 47 on the sliding plate 46 repel each other, so that the sliding plate 46 moves with the top plate 43 and the rolling column 44 to the rubber box 41. It should be noted that the baffle 49 can prevent the sliding plate 46 from sliding out of the receiving groove 45. As the movable block 15 continuously moves, the top plate 43 and the rolling column 44 after moving continuously extrude the plurality of rubber boxes 41, so that the liquid (which can be water, or other liquids according to actual conditions) in the rubber box 41 is sprayed to the surface of the bulldozing plate 2 through the liquid spraying pipe 42. The sprayed liquid assists the scraper 17 to clean the surface of the bulldozing plate 2, so as to loosen the impurities adhered to the bulldozing plate 2, facilitating the subsequent cleaning of the bulldozing plate 2 by the scraper 17. When the top plate 43 no longer extrudes the rubber box 41, the rubber box 41 will reset under the action of its own elastic potential energy. When resetting, the rubber box 41 will suck the liquid in the liquid storage box 51 into the rubber box 41 through the conduit 52, so that the top plate 43 can extrude the rubber box 41 to spray the liquid in the rubber box 41 out of the rubber box 41 again when resetting. If the top plate 43 does not need to extrude the rubber box 41 when resetting, the electromagnet 48 is powered off, and the sliding plate 46 will reset with the magnetic block 47, the top plate 43 and the rolling column 44, i.e. the top plate 43 will not extrude the rubber box 41 when resetting.

[0029] The bulldozing plate 2 is provided with an auxiliary mechanism 60, which includes a hollow rectangular frame 62 fixedly installed on the top of the bulldozing plate 2; the sliding column 22 is sealedly slid in the supporting column 21, and the supporting column 21 and the rectangular frame 62 are connected in communication through the connecting pipe 61. The bottom of the rectangular frame 62 is provided with a plurality of air outlets 63, and the air outlets 63 are fixedly installed with filter screens 64. The air outlets 63 of the rectangular frame 62 are rotatably connected with swing rods 65 through torsional springs, one end of the swing rod 65 is fixedly installed with an impact plate 66, and the bottom of the impact plate 66 is fixedly installed with a plurality of convex bosses 67 made of rubber.

[0030] When working, the connecting pipe 61 can effectively prevent the bulldozing plate 2 from being pushed over when the amount of impurities increases. At the same time, when the electric push rod 11 moves upward with the connecting frame 12 and other components, the sliding column 22 also slides in the supporting column 21, thereby extruding the gas in the supporting column 21, so that the gas in the supporting column 21 enters the rectangular frame 62 through the connecting pipe 61, and is sprayed to the bulldozing plate 2 through the gas outlet hole 63 of the rectangular frame 62, thereby achieving the effect of auxiliary cleaning of the bulldozing plate 2. It should be noted that the filter screen 64 plays a role in reducing the amount of impurities entering the rectangular frame 62. When the gas is sprayed through the gas outlet hole 63, it will push the impact plate 66 and the boss 67, so that the impact plate 66 and the boss 67 rotate to the filter screen 64 through the swing rod 65, thereby rotating the impact plate 66 and the boss 67, so that the filter screen 64 vibrates, thereby playing a role in dredging the filter screen 64.

[0031] Working principle: when the bulldozing plate 2 of the land leveler 1 completes the bulldozing work, the surface of the bulldozing plate 2 will be attached with a large amount of impurities, at this time, the electric push rod 11 is started, so that the output rod of the electric push rod 11 moves downward with the connecting frame 12 and the scraper 17 and other components, so that one end of the arc-shaped scraper 17 is in close contact with the surface of the arc-shaped bulldozing plate 2. Then start the servo motor 13 in the connecting frame 12, the servo motor 13 moves the movable block 15, the connecting rod 16 and the scraper 17 through the screw rod 14, thereby allowing the arc-shaped scraper 17 to clean the arc-shaped surface of the bulldozing plate 2. Through the reciprocating motion of the servo motor 13 and the screw rod 14 with the scraper 17, the bulldozing plate 2 is efficiently cleaned. At the same time, the supporting column 21 and the sliding column 22 assist in supporting the connecting frame 12, so that the connecting frame 12 can move up and down efficiently and stably. The design of the bellows 30 covers the output rod of the electric push rod 11 to reduce the influence of impurities on the output rod, so that the output rod of the electric push rod 11 can be used stably and for a long time.

[0032] When the movable block 15 moves again with the scraper 17 to clean the surface of the bulldozing plate 2, the electromagnetic iron 48 in the receiving groove 45 is started to make the electromagnetic iron 48 and the magnetic block 47 on the sliding plate 46 repel each other, and the sliding plate 46 will move with the top plate 43 and the rolling column 44 out of the rubber box 41. It should be noted that the sliding plate 46 will not slide out of the receiving groove 45 by setting the baffle 49. As the movable block 15 continuously moves, the top plate 43 and the rolling column 44 after moving continuously extrude the rubber box 41, so that the liquid in the rubber box 41 is sprayed to the surface of the bulldozing plate 2 through the liquid spraying pipe 42. The sprayed liquid assists the scraper 17 to clean the surface of the bulldozing plate 2, so as to loosen the impurities adhered to the bulldozing plate 2, facilitating the subsequent cleaning of the bulldozing plate 2 by the scraper 17. When the top plate 43 no longer extrudes the rubber box 41, the rubber box 41 will reset under the action of its own elastic potential energy. When resetting, the rubber box 41 will suck the liquid in the liquid storage box 51 into the rubber box 41 through the conduit 52, so that the top plate 43 can extrude the rubber box 41 to spray the liquid inside when resetting. If the top plate 43 does not need to extrude the rubber box 41 when resetting, the electromagnetic iron 48 can be powered off, and the sliding plate 46 will reset with the magnetic block 47, the top plate 43 and the rolling column 44, that is, the top plate 43 will not extrude the rubber box 41 when resetting.

[0033] By installing the connecting pipe 61, the bulldozing plate 2 can be effectively blocked when pushing impurities, and the impurities can be prevented from jumping over the bulldozing plate 2. When the electric push rod 11 moves upward with the connecting frame 12 and other components, the sliding column 22 will also slide in the supporting column 21, thereby extruding the gas in the supporting column 21, so that the gas in the supporting column 21 enters the rectangular frame 62 through the connecting pipe 61, and is sprayed to the bulldozing plate 2 through the gas outlet hole 63 of the rectangular frame 62, thereby achieving the effect of auxiliary cleaning of the bulldozing plate 2. It should be noted that the filter screen 64 plays a role in reducing the entry of impurities into the rectangular frame 62. When the gas is sprayed out of the gas outlet hole 63, it will push the impact plate 66 and the boss 67, so that the impact plate 66 and the boss 67 rotate to the filter screen 64 through the swing rod 65, thereby rotating the impact plate 66 to vibrate the filter screen 64, thereby playing a role in dredging the filter screen 64.

[0034] The above front, back, left, right, up and down are based on the drawings in the specification Figure 1 as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and the like.

[0035] In the description of the application, it is to be understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings and are used only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the application.

[0036] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A high-stability highway subgrade construction device, comprising a grader (1) and a bulldozer blade (2) mounted on the grader (1); characterized in that: The grader (1) is provided with a cleaning mechanism (10). The cleaning mechanism includes an electric push rod (11) fixedly installed on the grader (1). A connecting frame (12) is fixedly installed at the output rod end of the electric push rod (11). A servo motor (13) is fixedly installed inside the connecting frame (12). A lead screw (14) is fixedly installed at the output end of the servo motor (13). One end of the lead screw (14) is connected to the connecting frame (12). A movable block (15) is movably connected to the surface of the lead screw (14). A connecting rod (16) is fixedly installed at one end of the movable block (15), and a subsequent scraper (17) is fixedly installed at the bottom of the connecting rod (16).

2. The high-stability highway subgrade construction device according to claim 1, characterized in that: The grader (1) is provided with support mechanisms (20) on both sides. The support mechanism (20) includes a support column (21) fixedly connected to the grader (1). A sliding column (22) is slidably connected inside the support column (21). One end of the sliding column (22) is fixedly connected to the connecting frame (12).

3. The high-stability highway subgrade construction device according to claim 1, characterized in that: A hollow corrugated pipe (30) is fixedly installed between the connecting frame (12) and the leveling machine (1), and the corrugated pipe (30) covers the output rod of the electric push rod (11).

4. The high-stability highway subgrade construction device according to claim 1, characterized in that: The connecting frame (12) is provided with a spraying mechanism (40), which includes several rubber boxes (41) fixedly installed in the connecting frame (12). One side of the rubber box (41) is fixedly installed with a spray pipe (42) that is connected to the inside and has a one-way valve. The top of the movable block (15) is provided with a top plate (43).

5. The high-stability highway subgrade construction device according to claim 4, characterized in that: The top plate (43) is arc-shaped, and the top of the top plate (43) is rotatably connected to several rolling columns (44) made of rubber.

6. The high-stability highway subgrade construction device according to claim 5, characterized in that: The movable block (15) has a storage slot (45) inside, and a sliding plate (46) is slidably connected inside the storage slot (45). The top of the sliding plate (46) is fixedly connected to the top plate (43), and a baffle (49) is fixedly installed inside the storage slot (45). A magnetic block (47) is fixedly installed at the bottom of the sliding plate (46), and an electromagnet (48) is fixedly installed in the storage groove (45).

7. A high-stability highway subgrade construction device according to claim 6, characterized in that: The connecting frame (12) is provided with a storage mechanism (50), the storage mechanism (50) includes a liquid storage box (51) fixedly installed on the connecting frame (12), and a number of conduits (52) connected to the inside and equipped with one-way valves are fixedly installed on one side of the liquid storage box (51), and the number of conduits (52) are respectively connected to the inside of a number of rubber boxes (41).

8. A high-stability highway subgrade construction device according to claim 7, characterized in that: An auxiliary mechanism (60) is provided on the bulldozer plate (2). The auxiliary mechanism (60) includes a hollow rectangular frame (62) that is fixedly installed on the top of the bulldozer plate (2). The sliding column (22) slides in a sealed manner within the support column (21). The support column (21) and the rectangular frame (62) are connected by a connecting pipe (61). The bottom of the rectangular frame (62) is provided with several air outlets (63), and a filter screen (64) is fixedly installed in the air outlets (63).

9. A high-stability highway subgrade construction device according to claim 8, characterized in that: The rectangular frame (62) has a swing rod (65) rotatably connected to the air outlet (63) by a torsion spring. One end of the swing rod (65) is fixedly installed with an impact plate (66), and the bottom of the impact plate (66) is fixedly installed with several rubber bosses (67).

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