CN216174546U

CN216174546U - Cleaning mechanism, cleaning system and assembly line equipment

Info

Publication number: CN216174546U
Application number: CN202122369584.8U
Authority: CN
Inventors: 宋伟; 翁军; 李建伟; 王冠; 王晓冬; 王鸿君; 赵文生; 李涛
Original assignee: Dongfeng Nissan Passenger Vehicle Co
Current assignee: Dongfeng Nissan Passenger Vehicle Co
Priority date: 2021-09-28
Filing date: 2021-09-28
Publication date: 2022-04-05
Anticipated expiration: 2031-09-28

Abstract

The utility model discloses a cleaning mechanism which comprises a shell, a friction wheel, a transmission unit, a magnetic shaft, a cleaning brush and a recovery tank, wherein the friction wheel drives the magnetic shaft and the cleaning brush to rotate through the transmission unit, the shell is provided with a magnetic suction inlet, the magnetic shaft is arranged in the shell and is used for sucking a magnetic material into the shell through the magnetic suction inlet, the cleaning brush is in contact with the magnetic shaft, and the magnetic material adsorbed by the magnetic shaft is separated from the magnetic shaft and enters the recovery tank when the cleaning brush rotates. The utility model also discloses a cleaning system and assembly line equipment. The utility model borrows the power of the assembly line equipment, does not need to additionally add a power source, and saves the cost. In addition, the storage box can recycle the parts.

Description

Cleaning mechanism, cleaning system and assembly line equipment

Technical Field

The utility model relates to the technical field of cleaning equipment, in particular to a cleaning mechanism, a cleaning system and assembly line equipment.

Background

In the production process of the automobile assembly line, screws, part packaging bags and the like easily fall on the production line and need to be cleaned. If the cleaning is not timely, the problems of stopping of obstacles, blocking of casters and the like of an Automatic Guided Vehicle (AGV) are easily caused, and improvement is urgently needed.

At present, articles such as bolt and nuts, plastic packaging bags and the like falling on a production line are cleaned and collected manually by a broom, so that labor hour is wasted, and usable bolt and nuts are discarded as garbage, so that cost waste is generated.

If a set of self-powered cleaning equipment is independently designed for cleaning garbage on the production line, the arrangement of a power source needs to be increased, the structure is complex, the occupied space is large, and the cost is high.

Therefore, it is necessary to design a cleaning mechanism, a cleaning system and a flow line device which can automatically collect garbage and have no self-power.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide a cleaning mechanism, a cleaning system and a production line device which can automatically collect garbage and have no self power.

The utility model provides a cleaning mechanism which comprises a shell, a friction wheel, a transmission unit, a magnetic shaft, a cleaning brush and a recovery tank, wherein the friction wheel drives the magnetic shaft and the cleaning brush to rotate through the transmission unit, the shell is provided with a magnetic suction inlet, the magnetic shaft is arranged in the shell and is used for sucking magnetic materials into the shell through the magnetic suction inlet, the cleaning brush is in contact with the magnetic shaft, and the magnetic materials adsorbed by the magnetic shaft are separated from the magnetic shaft and enter the recovery tank when the cleaning brush rotates.

Furthermore, the transmission unit is a gear set, the gear set at least comprises a driving wheel, a first transmission gear and a second transmission gear, the friction wheel is coaxially and fixedly connected with the driving wheel, the first transmission gear is coaxially and fixedly connected with the magnetic shaft, the second transmission gear is coaxially and fixedly connected with a rotating shaft of the cleaning brush, and the rotating shaft and the magnetic shaft are arranged in parallel;

when the friction wheel rotates, the driving wheel is driven to rotate, the driving wheel drives the first transmission gear and the second transmission gear to rotate, the first transmission gear drives the magnetic shaft to rotate, the second transmission gear drives the cleaning brush to rotate, the magnetic shaft and the cleaning brush rotate in the same direction, and the magnetic shaft and the cleaning brush rotate in the opposite direction to the friction wheel.

Further, the casing still includes the receiver, be equipped with screw propulsion unit in the accumulator, the receiver is installed the end of accumulator, the brush cleaner will the magnetic shaft adsorbs magnetic material with the magnetic shaft separation and enter into after the accumulator, screw propulsion unit will the magnetic material pushes into in the receiver.

Further, the transmission unit comprises a third transmission gear, and the third transmission gear drives the spiral propelling unit to rotate.

Further, the screw propulsion unit includes a rotary rod and a screw blade that rotates around a central axis of the rotary rod.

Further, the vacuum suction device comprises a vacuum suction unit, wherein the vacuum suction unit is installed on the front side of the shell, a vacuum suction inlet is formed in the vacuum suction unit, and the vacuum suction inlet is located on the front side of the magnetic suction inlet.

The utility model also provides a cleaning system which comprises any one of the cleaning mechanisms and a hoisting unit, wherein the hoisting unit is arranged at the top of the shell and is used for driving the cleaning mechanism to lift so as to enable the friction wheel to be in line contact with a sliding plate line or a synchronous belt line on the assembly line equipment.

Further, the hoisting unit comprises a fixed support, a driving mechanism and a guide post, the driving mechanism and the guide post are installed on the fixed support, a piston rod of the driving mechanism is connected with the cleaning mechanism, one end of the guide post is also connected with the cleaning mechanism, and when the piston rod stretches out and draws back, the cleaning mechanism is driven to lift.

The utility model also provides the assembly line equipment which comprises a cleaning system.

After adopting above-mentioned technical scheme, have following beneficial effect:

according to the utility model, the friction wheel is in line contact with the sliding plate line or the synchronous belt line on the assembly line equipment, the power of the assembly line equipment is used, no additional power source is required, and the cost is saved. After the friction wheel rotates, the magnetic shaft and the cleaning brush are driven to rotate, the magnetic shaft sucks the magnetic material into the shell through the magnetic suction inlet and brings the magnetic material into the cleaning brush, and the cleaning brush rotates to lower the magnetic material into the containing box, so that the magnetic material is collected, the metal parts of the bolt and the nut on the assembly line equipment are cleaned, and the parts can be recycled.

Drawings

The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:

FIG. 1 is a perspective view of a sweeping system in accordance with an embodiment of the present invention;

FIG. 2 is an exploded view of a cleaning system in accordance with an embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of the sweeping mechanism in an embodiment of the present invention;

FIG. 4 is an exploded view of the friction wheel and drive unit of the sweeping mechanism in one embodiment of the present invention;

FIG. 5 is an enlarged partial view of another perspective of the sweeping mechanism in an embodiment of the present invention;

FIG. 6 is an enlarged partial view of yet another perspective of the sweeping mechanism in an embodiment of the present invention;

FIG. 7 is a schematic diagram of a pipeline apparatus in an embodiment of the utility model.

Reference symbol comparison table:

cleaning mechanism 10:

a housing 1: a friction wheel cover 12, a recovery tank 13 and a mounting plate 14;

a friction wheel 2;

the transmission unit 3: the driving wheel 31, the first transmission gear 32, the second transmission gear 33 and the third transmission gear 34;

a magnetic shaft 4, a cleaning brush 5 and a storage box 6;

screw propulsion unit 7: a rotary rod 71, a helical blade 72;

vacuum adsorption unit 8: an air intake duct 82, a suction device 83;

hoisting unit 9: fixed bolster 91, actuating mechanism 92, guide post 93.

Assembly line mesa 20, automobile body 30.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings.

It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are only exemplary illustrations of the technical solutions of the present invention, and should not be construed as being all of the present invention or as defining or limiting the technical solutions of the present invention.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

The first embodiment is as follows:

as shown in fig. 1-3, the cleaning mechanism 10 includes a housing 1, a friction wheel 2, a transmission unit 3, a magnetic shaft 4, a cleaning brush 5 and a recycling tank 13, the friction wheel 2 drives the magnetic shaft 4 and the cleaning brush 5 to rotate through the transmission unit 3, a magnetic suction inlet is formed in the housing 1, the magnetic shaft 4 is installed in the housing 1 and used for sucking a magnetic material into the housing 1 through the magnetic suction inlet, the cleaning brush 5 contacts with the magnetic shaft 4, and the magnetic material adsorbed by the magnetic shaft 4 is separated from the magnetic shaft 4 and enters the recycling tank 13 when the cleaning brush 5 rotates.

The "magnetic material" in the present invention includes: ferromagnetic materials and ferrimagnetic materials, both of which are collectively referred to as ferromagnetic materials, are referred to as magnetic materials for short. The magnetic material on the flow line may be: screws, nuts, iron filings, etc.

Specifically, the shell 1 is a shell of the whole cleaning mechanism 10, the friction wheel 2, the transmission unit 3, the magnetic shaft 4 and the cleaning brush 5 are all installed inside the shell 1, and the recovery tank 13 is installed on the outer surface of the shell 1, so that garbage is convenient to collect.

The magnetic suction inlet is formed in the lower portion of the shell 1, and magnetic materials on the assembly line can be conveniently adsorbed.

The friction wheel 2 transmits power to the magnetic shaft 4 and the cleaning brush 5 through the transmission unit 3 to drive the magnetic shaft 4 and the cleaning brush 5 to rotate.

The magnetic shaft 4 is located near the magnetic inlet, and draws the magnetic material into the housing 1 through the magnetic inlet.

The magnetic shaft 4 and the cleaning brush 5 are arranged adjacently, the brush hair of the cleaning brush 5 is contacted with the surface of the magnetic shaft 4, when the cleaning brush 5 rotates, the object belt adsorbed on the magnetic shaft 4 can be carried under the magnetic belt, and the magnetic material is separated from the magnetic shaft 4. The separated magnetic material enters the recovery tank 13 and is collected by the recovery tank 13, so that the magnetic material is convenient to recover and reuse.

When the pipeline needs to be cleaned, the whole cleaning mechanism 10 is placed on the pipeline equipment, and the friction wheel 2 is in line contact with a sliding plate line or a synchronous belt on the pipeline equipment. Therefore, the power of the production line equipment is used, and the sliding plate line or the synchronous belt line drives the friction wheel 2 to rotate. After the friction wheel 2 rotates, the magnetic shaft 4 and the cleaning brush 5 are driven to rotate through the transmission unit 3. In the rotation process of the magnetic shaft 4, the magnetic material on the passing assembly line is adsorbed to the surface of the magnetic shaft 4 through the magnetic suction inlet, when the magnetic material rotates to the position of the cleaning brush 5 along with the magnetic shaft 4, the magnetic material is separated from the magnetic shaft 4 under the brush of the cleaning brush 5, and then the magnetic material enters the recovery tank 13.

When the friction wheel 2 is in contact with a sliding plate line or a synchronous belt line on the assembly line equipment, a certain distance is reserved between the magnetic suction inlet and the table surface of the assembly line, so that the assembly line equipment is prevented from being damaged due to the fact that the magnetic suction inlet is stuck or scratched with a magnetic material. By providing the magnetic shaft 4 with sufficient magnetic force, it can be ensured that all the magnetic material passing by can be attracted to the magnetic shaft 4.

In the embodiment, the power of the assembly line equipment is borrowed, and no additional power source is needed, so that the cost is saved. In addition, the receiver is with magnetic material's collection, has both cleared up this type of metal part of bolt and nut on the assembly line equipment, can retrieve the part again and recycle.

Further, as shown in fig. 1-2, the housing 1 includes a friction wheel cover 12, the friction wheel 2 is partially installed in the friction wheel cover 12, and the bottom of the friction wheel 2 protrudes from the friction wheel cover 12.

Specifically, the friction wheel 2 and part of the transmission unit 3 are installed in the friction wheel cover 12, and two groups of the friction wheel 2, the transmission unit 3 and the friction wheel cover 12 are respectively located on the left side and the right side. The lower part of the friction wheel cover 12 is opened, and the bottom of the friction wheel 2 extends out of the lower part of the friction wheel cover 12, so that the friction wheel can be conveniently contacted with a sliding plate line or a synchronous belt line of the production line equipment.

Further, as shown in fig. 4-6, the transmission unit 3 is a gear set, the gear set at least includes a driving wheel 31, a first transmission gear 32 and a second transmission gear 33, the friction wheel 2 is coaxially and fixedly connected with the driving wheel 31, the first transmission gear 32 is coaxially and fixedly connected with the magnetic shaft 4, the second transmission gear 33 is coaxially and fixedly connected with a rotating shaft 51 of the cleaning brush 5, and the rotating shaft 51 and the magnetic shaft 4 are arranged in parallel;

when the friction wheel 2 rotates, the driving wheel 31 is driven to rotate, the driving wheel 31 drives the first transmission gear 32 and the second transmission gear 33 to rotate, the first transmission gear 32 drives the magnetic shaft 4 to rotate, the second transmission gear 33 drives the cleaning brush 5 to rotate, the rotation directions of the magnetic shaft 4 and the cleaning brush 5 are the same, and the rotation directions of the magnetic shaft 4 and the cleaning brush 5 are opposite to that of the friction wheel 2.

Specifically, the friction wheel 2 is coaxially and fixedly connected with the driving wheel 31, when the friction wheel 2 rotates, the driving wheel 31 is driven to rotate, the power of the driving wheel 31 is transmitted to the first transmission gear 32 through one or more transmission gears, and the first transmission gear 32 is coaxially and fixedly connected with the magnetic shaft 4, so that the rotation of the magnetic shaft 4 is driven. The power of the driving wheel 31 is also transmitted to the second transmission gear 33 through one or more transmission gears, the second transmission gear 33 is coaxially and fixedly connected with the rotating shaft 51 of the cleaning brush 5, the rotating shaft 51 and the magnetic shaft 4 are arranged in parallel, so that the rotation of the cleaning brush 5 is driven, and the bristles 52 of the cleaning brush 5 are in contact with the surface of the magnetic shaft 4.

In order to better adsorb the magnetic material by the magnetic shaft 4, the rotating direction of the magnetic shaft 4 is opposite to the material feeding direction of the assembly line equipment, and the rotating direction of the cleaning brush 5 is the same as the rotating direction of the magnetic shaft 4, so that the magnetic material adsorbed by the magnetic shaft 4 from bottom to top is conveniently separated from the magnetic shaft 4. Therefore, the rotation direction of the magnetic shaft 4 and the cleaning brush 5 is set to be opposite to the rotation direction of the friction wheel 2.

Preferably, the rotational speed of the sweeper brush 5 is greater than the rotational speed of the magnetic shaft 4.

Further, as shown in fig. 1, the housing 1 further includes a storage box 6, a spiral pushing unit 7 is provided in the recovery tank 13, the storage box 6 is installed at the end of the recovery tank 13, the cleaning brush 5 separates the magnetic material adsorbed by the magnetic shaft 4 from the magnetic shaft 4 and enters the recovery tank 13, and the spiral pushing unit 7 pushes the magnetic material into the storage box 6.

Specifically, the spiral propelling unit 7 is adjacent to the cleaning brush 5, the cleaning brush 5 can bring the magnetic material to the spiral propelling unit 7, and the spiral propelling unit 7 rotates to push the magnetic material into the containing box 6.

Further, as shown in fig. 4-6, the transmission unit 3 includes a third transmission gear 34, and the third transmission gear 34 drives the screw propulsion unit 7 to rotate.

The third transmission gear 34 is also driven by the driving gear 31, and the rotation of the third transmission gear 34 is driven by one or more transmission gears.

Further, as shown in fig. 5, the screw propulsion unit 7 includes a rotating rod 71 and a screw blade 72, and the screw blade 72 rotates about the central axis of the rotating rod 71.

The rotating rod 71, the magnetic shaft 4 and the rotating shaft 51 are arranged in parallel, the spiral blades 72 are distributed around the rotating rod 71 in a spiral mode, and when the spiral propelling unit 7 rotates, the spiral blades 72 can push magnetic materials to enter the storage box 6 located at the tail end of the spiral propelling unit 7 along the axial direction of the rotating rod 71, so that the magnetic materials are collected.

The rotation direction of the screw propulsion unit 7 and the position of the storage box 6 are set according to the inclination direction of the screw blade 72 so that the garbage can be pushed from one end of the rotating rod 71 to the other end and into the storage box 6 after the screw blade 72 is rotated.

Preferably, the storage box 6 is detachably connected to the housing 1, and when the storage box 6 is fully collected, the storage box 6 is detached to pour out the magnetic material.

Optionally, the storage box 6 and the shell 1 can be hinged on one side and connected on the other side through a buckle. When cleaning garbage, the buckle is locked; after cleaning, with buckle unblock, rotate receiver 6, clear away rubbish.

Optionally, as shown in fig. 1, a vacuum adsorption unit 8 is further included, the vacuum adsorption unit 8 is installed at the front side of the housing 1, and a vacuum suction port is opened on the vacuum adsorption unit 8 and is located at the front side of the magnetic suction port.

Specifically, the vacuum adsorption unit 8 includes a vacuum suction port, a suction pipe 82 (see fig. 7) connected between the vacuum suction port and a suction device 83 (see fig. 7) disposed above the vacuum suction port.

When cleaning, the vacuum suction inlet is positioned at the front side of the magnetic suction inlet and is used for sucking articles such as part packaging bags on the assembly line, and the part packaging bags are prevented from being wound on the rotating magnetic shaft 4 after being sucked into the vacuum suction unit 8, so that the cleaning work of the magnetic materials is avoided being influenced.

A certain distance is left between the vacuum suction inlet and the table-board of the production line, so that the vacuum suction inlet and the magnetic material are prevented from being stuck or scraped.

The suction force of the vacuum adsorption unit 8 in this embodiment is not enough to adsorb magnetic materials, and only can adsorb articles such as plastic bags with light weight, thereby realizing the classified collection of different types of garbage and facilitating the recycling.

The cleaning mechanism 10 in the embodiment can save manpower and improve the cleaning efficiency of the production line; and a power source is not required to be added, the power of assembly line equipment is utilized, the structure is more compact, and the cost is reduced. Collect magnetic material through the receiver, be convenient for to magnetic material's recycle. The vacuum adsorption unit is arranged in front of the shell, and the cleaning of the packaging bag can be realized.

Example two:

as shown in fig. 1-2, the cleaning system includes a cleaning mechanism 10 in the first embodiment and the modification thereof, and further includes a hoisting unit 9, the hoisting unit 9 is installed at the top of the housing 1, the hoisting unit 9 is used for driving the cleaning mechanism 10 to ascend and descend, and the cleaning mechanism 10 makes the friction wheel 2 contact with a sliding plate line or a synchronous belt line on the assembly line equipment.

The hoisting unit 9 can drive the whole cleaning mechanism 10 to lift, and when cleaning is required, the cleaning mechanism 10 is pushed downwards to enable the friction wheel 2 to be in contact with assembly line equipment; after the cleaning mechanism 10 is cleaned up, the cleaning mechanism 10 is driven to ascend, and the normal operation of the assembly line equipment is not affected by the cleaning mechanism 10.

Further, the hoisting unit 9 includes a fixed support 91, a driving mechanism 92 and a guide post 93, the driving mechanism 92 and the guide post 93 are installed on the fixed support 91, a piston rod of the driving mechanism 92 is connected with the cleaning mechanism 10, one end of the guide post 93 is also connected with the cleaning mechanism 10, and when the piston rod extends and retracts, the cleaning mechanism 10 is driven to ascend and descend.

Wherein, actuating mechanism 92 is used for driving whole cleaning mechanism 10 oscilaltion, and two guide posts 93 divide half to be located actuating mechanism 92's the left and right sides for play the effect of direction, prevent to clean mechanism 10 lift in-process and rock. In this embodiment, the drive mechanism 92 is a hydraulic cylinder.

Example three:

as shown in fig. 7, the in-line apparatus includes a scavenging system. The cleaning system can be used as a part of the assembly line equipment, when cleaning is needed, the cleaning system is started, and after cleaning is finished, the cleaning system is closed.

Specifically, the two cleaning mechanisms 10 are respectively disposed on the left and right sides of the vehicle body 30 and above the floor 20 of the production line. When cleaning is needed, the cleaning mechanism 10 descends to contact with the production line table top 20; after cleaning, the cleaning mechanism 10 ascends to be separated from the assembly line table 20.

The suction duct 82 of the vacuum adsorption unit 8 is arranged on the hanger above the assembly line table 20, the other end of the suction duct 82 is connected with the suction device 83, and the suction device 83 is installed at the bottom of the hanger.

The fixing bracket 91 of the hoisting unit 9 is fixed on the hoisting frame, so that the whole cleaning mechanism 10 is installed.

The foregoing is considered as illustrative only of the principles and preferred embodiments of the utility model. It should be noted that, for those skilled in the art, several other modifications can be made on the basis of the principle of the present invention, and the protection scope of the present invention should be regarded.

Claims

1. The cleaning mechanism (10) is characterized by comprising a shell (1), a friction wheel (2), a transmission unit (3), a magnetic shaft (4), a cleaning brush (5) and a recovery tank (13), wherein the friction wheel (2) drives the magnetic shaft (4) and the cleaning brush (5) to rotate through the transmission unit (3), a magnetic suction inlet is formed in the shell (1), the magnetic shaft (4) is installed in the shell (1) and used for sucking a magnetic material into the shell (1) through the magnetic suction inlet, the cleaning brush (5) is in contact with the magnetic shaft (4), and the cleaning brush (5) rotates to separate the magnetic material adsorbed by the magnetic shaft (4) from the magnetic shaft (4) and enter the recovery tank (13).

2. The sweeping mechanism (10) according to claim 1, wherein the transmission unit (3) is a gear set, the gear set at least comprises a driving wheel (31), a first transmission gear (32) and a second transmission gear (33), the friction wheel (2) is coaxially and fixedly connected with the driving wheel (31), the first transmission gear (32) is coaxially and fixedly connected with the magnetic shaft (4), the second transmission gear (33) is coaxially and fixedly connected with a rotating shaft of the sweeping brush (5), and the rotating shaft and the magnetic shaft (4) are arranged in parallel;

when friction pulley (2) rotated, drive action wheel (31) rotate, action wheel (31) drive first drive gear (32) with second drive gear (33) rotate, first drive gear (32) drive magnetism axle (4) rotate, second drive gear (33) drive cleaning brush (5) rotate, magnetism axle (4) with the direction of rotation of cleaning brush (5) is the same, and all with the direction of rotation of friction pulley (2) is opposite.

3. The cleaning mechanism (10) according to claim 1, wherein the housing (1) further comprises a storage case (6), a screw pushing unit (7) is provided in the recovery tank (13), the storage case (6) is installed at the end of the recovery tank (13), and the screw pushing unit (7) pushes the magnetic material adsorbed by the magnetic shaft (4) into the storage case (6) after the cleaning brush (5) separates the magnetic material from the magnetic shaft (4) and enters the recovery tank (13).

4. Sweeping mechanism (10) according to claim 3, characterized in that the transmission unit (3) comprises a third transmission gear (34), which third transmission gear (34) rotates the screw propulsion unit (7).

5. The sweeping mechanism (10) according to claim 3, characterized in that the screw propulsion unit (7) comprises a rotary rod (71) and a screw blade (72), the screw blade (72) being rotated about a central axis of the rotary rod (71).

6. The cleaning mechanism (10) according to claim 1, further comprising a vacuum suction unit (8), wherein the vacuum suction unit (8) is installed at the front side of the housing (1), and a vacuum suction port is opened on the vacuum suction unit (8) and located at the front side of the magnetic suction port.

7. A cleaning system is characterized by comprising the cleaning mechanism (10) as claimed in any one of claims 1 to 6, and further comprising a hoisting unit (9), wherein the hoisting unit (9) is installed at the top of the housing (1), the hoisting unit (9) is used for driving the cleaning mechanism (10) to lift, and the cleaning mechanism (10) enables the friction wheel (2) to be in line contact with a sliding plate line or a synchronous belt line on a production line device.

8. The sweeping system according to claim 7, wherein the hoisting unit (9) comprises a fixed support, a driving mechanism and a guide post, the driving mechanism and the guide post are mounted on the fixed support, a piston rod of the driving mechanism is connected with the sweeping mechanism (10), one end of the guide post is also connected with the sweeping mechanism (10), and the piston rod drives the sweeping mechanism (10) to lift when extending and retracting.

9. An in-line apparatus comprising the scavenging system of claim 7.