Externally-hung electric propulsion device for ship body

文档序号:1498320 发布日期:2020-02-07 浏览:22次 中文

阅读说明:本技术 一种用于船体的外挂式电动推进装置 (Externally-hung electric propulsion device for ship body ) 是由 陈维加 于 2019-10-16 设计创作,主要内容包括:本发明公开了一种用于船体的外挂式电动推进装置,其特征在于为一种独立的外挂装置,包括航行浮体、装于航行浮体上的一个以上电动螺旋桨及其驱动器以及设于航行浮体内用于向电动螺旋桨及其驱动器供能的动力电池;航行浮体通过可拆式外连机构连接在现行船体的尾部以推动船体行驶,或者连接在船体的前部以拉动船体行驶;还包括设于船体上同电动螺旋桨的驱动器通过有线或无线方式相连的外设控制器,该外设控制器用于控制电动螺旋桨的正反转及转速。本发明能够作为现行船舶的航行动力装置,能够解决燃油机动船舶的污染问题,同时其具备快速更换的特性也解决了内置电池的电动船舶的续航问题,节约能源,且易于实施和推广。(The invention discloses an externally-hung electric propulsion device for a ship body, which is characterized by being an independent externally-hung device, comprising a navigation floating body, more than one electric propeller arranged on the navigation floating body and a driver thereof, and a power battery arranged in the navigation floating body and used for supplying energy to the electric propeller and the driver thereof; the sailing floating body is connected to the tail part of the existing ship body through a detachable external connection mechanism to push the ship body to run or is connected to the front part of the ship body to pull the ship body to run; the ship further comprises an external controller which is arranged on the ship body and connected with a driver of the electric propeller in a wired or wireless mode, and the external controller is used for controlling the positive and negative rotation and the rotating speed of the electric propeller. The invention can be used as a navigation power device of the existing ship, can solve the pollution problem of the fuel oil motor ship, has the characteristic of quick replacement, solves the endurance problem of the electric ship with a built-in battery, saves energy, and is easy to implement and popularize.)

1. An externally-hung electric propulsion device for a ship body is characterized by being an independent externally-hung device, comprising a navigation floating body (1), more than one electric propeller (2) and a driver thereof which are arranged on the navigation floating body (1), and a power battery (3) which is arranged in the navigation floating body (1) and is used for supplying energy to the electric propeller (2) and the driver thereof; the navigation floating body (1) is connected to the tail part of the ship body (4) through a detachable external connection mechanism to push the ship body (4) to run, or is connected to the front part of the ship body (4) to pull the ship body (4) to run; the ship is characterized by further comprising an external controller (5) which is arranged on the ship body (4) and connected with a driver of the electric propeller (2) in a wired or wireless mode, wherein the external controller (5) is used for controlling the positive and negative rotation and the rotating speed of the electric propeller (2).

2. An outboard electric propulsion device for a ship hull according to claim 1, characterized in that said hull (4) is the hull of an existing ship with a steering rudder, and said electric propeller (2) is an electric propeller of fixed angle type, the direction of travel of the hull (4) being controlled by its own steering rudder.

3. An outboard electric propulsion device for a ship hull according to claim 1, characterized in that said ship hull (4) is a hull of an existing engine power propelled ship, or a manpower propelled ship, or a wind-propelled ship; or the ship body (4) is the ship body of an unpowered ship; the electric propeller (2) is an angle rotation type electric propeller, and the peripheral controller (5) can also control the steering angle of the angle rotation type electric propeller so as to control the driving direction of the external electric propulsion device and the ship body (4) driven by the external electric propulsion device.

4. An outboard electric propulsion device for a ship hull according to claim 3, characterized in that said electric propeller (2) is an angle-rotating electric propeller comprising a propeller (7), a propeller drive mechanism, a steering rudder (6) and a steering rudder drive mechanism; the steering rudder (6) is rotatably assembled at the lower part of the navigation floating body (1), and the propeller (7) is transversely and rotatably assembled at the lower part of the steering rudder (6); the propeller driving mechanism comprises a shell (8), a propeller driving motor (9), a planetary gear speed reducing mechanism (10), a propeller driving longitudinal shaft (11), a propeller driving transverse shaft (12) and a bevel gear transmission mechanism (13); the outer shell (8) is fixed on the upper part of the navigation floating body (1), the propeller driving motor (9) is fixed on the outer shell (8), the output shaft of the propeller driving motor is connected with a propeller driving longitudinal shaft (11) arranged in the steering rudder (6) through a planetary gear speed reducing mechanism (10) arranged in the outer shell (8), the propeller driving longitudinal shaft (11) is connected with a propeller driving transverse shaft (12) through a bevel gear transmission mechanism (13), and the propeller driving transverse shaft (12) is connected with the propeller (7); the steering rudder driving mechanism comprises a steering rudder driving motor (14), a steering rudder connecting shaft (15), a steering worm wheel (16) and a steering worm (17); a steering rudder connecting shaft (15) positioned in the shell (8) is fixed on the steering rudder (6), a steering worm wheel (16) is fixed on the steering rudder connecting shaft (15), a steering rudder driving motor (14) is fixed on the shell (8), and an output shaft of the steering rudder driving motor is matched with the steering worm wheel (16) through a steering worm (17).

5. The outboard type electric propulsion device for the ship body of claim 1, characterized in that the detachable outboard mechanism is one of a snap ring mechanism, a buckle mechanism, a loop bar mechanism, a manual mechanical lock mechanism, an electromechanical lock mechanism, and an electromagnetic lock mechanism, and comprises a male end connecting mechanism fixed on the sailing float (1) and a female end connecting mechanism for being fixed with the ship body (4) and being matched with the male end connecting mechanism, or the detachable outboard mechanism comprises two connecting frames or plates fixed on the sailing float (1) and the ship body (4) respectively, and the two connecting frames or plates are connected and fixed through bolts or binding ropes.

6. An externally-hung electric propulsion device for a ship hull according to claim 1 or 5, wherein at least two or more detachable externally-connected mechanisms are adopted, and at least two detachable externally-connected mechanisms are arranged in a horizontal equal height or staggered mode.

7. The externally hung electric propulsion device for the ship body as claimed in claim 2, characterized in that the sailing float (1) is provided with a cockpit (1 a), the cockpit (1 a) is internally provided with an internal controller electrically connected with a driver of the electric propeller (2), and the internal controller is used for controlling the forward and reverse rotation and the rotating speed of the electric propeller (2).

8. An externally-hung electric propulsion device for a ship hull as claimed in claim 3, characterized in that a cockpit (1 a) is arranged on the navigation floating body (1), and an internally-arranged controller electrically connected with a driver of the electric propeller (2) is arranged in the cockpit (1 a) and used for controlling the positive and negative rotation and the rotating speed as well as the steering angle of the electric propeller (2).

9. The outboard-type electric propulsion device for the ship body as claimed in claim 1, wherein the sailing float (1) is provided with a charging module connected with the power battery (3), the charging module comprises an electric quantity monitoring module, and the peripheral controller (5) is provided with a low-electric-quantity warning device and an electric quantity display device which are electrically connected with the electric quantity monitoring module.

10. An externally-hung electric propulsion device for a ship hull according to claim 3 or 8, characterized in that two sailing floats (1) are connected with each other through at least two detachable self-connecting mechanisms which are arranged in a horizontal equal height or staggered way, wherein the detachable self-connecting mechanisms are one of a spring buckle mechanism, a loop bar mechanism, a mechanical locking mechanism and an electromagnetic locking mechanism, and comprise a male end self-connecting mechanism fixed on one sailing float (1) and a female end self-connecting mechanism fixed on the other sailing float (1); or the detachable self-connecting mechanism comprises two connecting frames or connecting plates which are respectively fixed on the two sailing floating bodies (1), and the two connecting frames or the connecting plates are connected and fixed through bolts or binding ropes; and the detachable self-connecting mechanism and the detachable external connecting mechanism are arranged at two ends of a single navigation floating body (1) at an angle of 180 degrees.

Technical Field

The invention relates to an externally-hung electric propulsion device for a ship body.

Background

With the rapid development of society, the number of fuel (diesel oil or gasoline) motor vehicles and boats is increased extremely rapidly, and the air pollution is also serious while the life of people is improved. In recent years, various measures are taken by the nation to reduce air pollution, and the policy of supporting new energy automobiles is particularly and vigorously promoted. Therefore, in short years, the technologies of batteries, motors, control systems and whole vehicles are rapidly developed, and the proportion of electric vehicles is rapidly increased. The discharge capacity per horsepower of a marine vessel is far more severe than that of an automobile. According to a research report on atmospheric pollutants of ships in Jiangsu province, which is published by the environmental detection center in Jiangsu province in 2014 12 months, the water transportation condition and the ship pollution in China are investigated in great detail. Compared with ships in the world, the ship engine in China has obvious defects, and low-end diesel engines are widely applied, so that the difference from the international level exists. In the aspect of air pollution of marine diesel engines, the emission of China is far higher than the level of developed countries in Europe and America. With the further development of economy in China, the pollution of ships is more and more serious, so that how to control and reduce the exhaust emission of ships is urgent.

Of course, in terms of pollution control, a better method is conceivable to replace an oil-fired power boat with an electrically-driven hull (power boat) with a built-in battery, but considering the problem of continuous cruising with a long single-trip time of a commercial ship and the problem of high cost of the battery, the use of the built-in battery is not suitable for the application environment of the commercial ship. The scheme of the built-in battery is necessary to adopt a large-capacity battery in order to ensure a long navigation mileage, but the large-capacity battery is inconvenient and expensive to replace on one hand, and on the other hand, the charging time is very long, so that the service cycle and the efficiency of the automobile ferry cannot be ensured. In addition, if various existing ship bodies are electrically transformed or an electric ship is directly adopted to replace an existing ship, the transformation is obviously unrealistic, the transformation cost is high, a large number of existing ship bodies are abandoned, and a large number of resources are wasted. Therefore, a better solution for solving the current ship pollution problem is urgently needed.

Disclosure of Invention

The invention aims to: the utility model provides an outer hanging electric propulsion unit for hull can solve the pollution problem of present fuel motor boat and the continuation of the journey problem of the electric ship of built-in battery to can the energy saving, easily implement simultaneously and promote.

The technical scheme of the invention is as follows: an external hanging type electric propulsion device for a ship body is characterized by being an independent external hanging device and comprising a navigation floating body, more than one electric propeller and a driver thereof which are arranged on the navigation floating body, and a power battery which is arranged in the navigation floating body and used for supplying energy to the electric propeller and the driver thereof; the sailing floating body is connected to the tail part of the existing ship body through a detachable external connection mechanism to push the ship body to run or is connected to the front part of the ship body to pull the ship body to run; the ship further comprises an external controller which is arranged on the ship body and connected with a driver of the electric propeller in a wired or wireless mode, and the external controller is used for controlling the positive and negative rotation and the rotating speed of the electric propeller.

When more than one electric propeller is provided, they may be arranged side by side in the longitudinal or transverse direction on the traveling float, or arranged in a staggered manner in the high-low and front-back direction, which is not limited by the present invention.

It should be noted that when the hull of the present invention is the hull of an existing ship with a rudder, such as the hull of an existing engine-powered ship, the existing fuel-powered (diesel and gasoline) motor-driven ship and the electric ship with a built-in battery, or the existing wind-powered ship (sailing ship); under the premise, the electric propeller is an angle-fixed electric propeller, and the driving direction of the ship body is controlled by a steering rudder of the ship body. The design scheme enables the peripheral controller on the ship body to be only used for controlling the power of the forward and backward movement of the externally-hung electric propulsion device.

The invention is usually butt-jointed when the ship body is on the shore, and other ships can be towed to the sailing position of the ship body to butt-jointed. In order to facilitate the operation, the navigation floating body is preferably provided with a cockpit, and the cockpit is internally provided with an internal controller which is electrically connected with a driver of the electric propeller and is used for controlling the positive and negative rotation and the rotating speed of the electric propeller. The design of cockpit makes things convenient for personnel directly to implement to control to outer hanging electric propulsion unit, also is convenient for the delivery personnel to carry out the butt joint operation of navigation body and hull and the debugging operation of being connected of peripheral hardware controller and electric screw driver simultaneously.

It is of course to be noted that the hull according to the invention may also be the hull of a manually propelled boat (such as a rowing boat), in addition to the hull of the current engine powered and wind propelled boat mentioned above; or the hull of an unpowered vessel, such as a barge, or other vessels of the type specifically manufactured for cargo carriers that do not have the ability to navigate, such vessels typically having no rudder thereon;

under the premise that the electric propeller is designed to be an angle rotation type electric propeller, the peripheral controller can also control the steering angle of the angle rotation type electric propeller, so that the driving direction of the externally-hung electric propulsion device and the ship body driven by the externally-hung electric propulsion device is controlled. It should be said that the design of the electric propeller on the external electric propulsion device adopting the angle rotary electric propeller gives enough sailing freedom to the external electric propulsion device itself, facilitates the butt joint with the ship body, and is particularly convenient for the butt joint of the ship body when sailing (non-shore state). And controlling the sailing direction of the externally-hung electric propulsion device obviously can control the sailing direction of the ship body pushed or pulled by the externally-hung electric propulsion device. It is to be understood that even if the angle-rotating electric propeller is used, the sailing direction of the hull of the existing vessel having sailing steering capability can be controlled by its own steering rudder in actual sailing, such as the engine power propelled vessel with the steering rudder and the wind power propelled vessel mentioned above.

Of course, the electric propeller, whether it is an angle-fixed electric propeller or an angle-rotating electric propeller, is a mature technology at present, and the technologies of the driver and the connection control between the driver and the external controller are well known in the industry.

On the basis, in order to further simplify the structural design of the externally-hung electric propulsion device, an angle-rotating electric propeller is preferably designed as follows:

the steering rudder comprises a propeller, a propeller driving mechanism, a steering rudder and a steering rudder driving mechanism; the steering rudder is rotatably assembled at the lower part of the navigation floating body, and the propeller is transversely and rotatably assembled at the lower part of the steering rudder; the propeller driving mechanism comprises a shell, a propeller driving motor, a planetary gear speed reducing mechanism, a propeller driving longitudinal shaft, a propeller driving transverse shaft and a bevel gear transmission mechanism; the outer shell is fixed on the upper part of the navigation floating body, the propeller driving motor is fixed on the outer shell, the output shaft of the propeller driving motor is connected with a propeller driving longitudinal shaft arranged in the steering rudder through a planetary gear speed reducing mechanism arranged in the outer shell, the propeller driving longitudinal shaft is connected with a propeller driving transverse shaft through a bevel gear transmission mechanism, and the propeller driving transverse shaft is connected with the propeller; the steering rudder driving mechanism comprises a steering rudder driving motor, a steering rudder connecting shaft, a steering worm wheel and a steering worm; a steering rudder connecting shaft positioned in the shell is fixed on the steering rudder, a steering worm wheel is fixed on the steering rudder connecting shaft, a steering rudder driving motor is fixed on the shell, and an output shaft of the steering rudder driving motor is matched with the steering worm wheel through a steering worm.

More preferably, the navigation floating body is provided with a cockpit, the cockpit is internally provided with an internal controller which is electrically connected with a driver of the electric propeller, and the internal controller is used for controlling the positive and negative rotation, the rotating speed and the steering angle of the electric propeller. Similarly, the design of the cockpit facilitates direct operation of the externally-hung electric propulsion device by personnel, and meanwhile, the design is convenient for the carrying personnel to carry out butt joint operation of the navigation floating body and the ship body and connection debugging operation of the external controller and the electric propeller driver.

Further, the detachable external connection mechanism is one of a spring buckle ring mechanism, a buckle mechanism, a loop bar mechanism, a manual mechanical lock mechanism, an electromechanical lock mechanism and an electromagnetic lock mechanism, and comprises a male end connection mechanism fixed on the navigation floating body and a female end connection mechanism used for being fixed with the ship body of the existing ship and matched with the male end connection mechanism, or the detachable external connection mechanism comprises two connection frames or connection plates respectively fixed on the navigation floating body and the ship body, and the two connection frames or connection plates are connected and fixed through bolts or binding ropes.

The detachable external connecting mechanism is designed to facilitate the quick butt joint and reliable fixation between the externally-hung electric propulsion device and the ship body. The design forms of the male end external connection mechanism and the female end external connection mechanism and the matching structures of the male end external connection mechanism and the female end external connection mechanism are various and are common quick connection mechanisms in the industry at present, and the list is not exhaustive.

Taking the existing spring buckle ring mechanism as an example, the spring buckle ring mechanism is composed of a spring buckle ring body and a connecting ring or a connecting rod matched with the spring buckle ring body, the spring buckle ring body is used as a male end external connection mechanism to be fixed or integrally designed on a navigation floating body, and the connecting ring or the connecting rod is used as a female end external connection mechanism to be fixed on a ship body of the ship body. Therefore, the connection can be completed only by clamping the connecting ring or the connecting rod into the spring retaining ring body.

Or taking the existing buckle mechanism as an example, the buckle mechanism is composed of a connecting rod and a U-shaped buckle for the interference clamping of the connecting rod, the U-shaped buckle is used as a male end external connection mechanism to be fixed or integrally designed on the navigation floating body, and the connecting rod is used as a female end external connection mechanism to be welded on the hull of the hull. Therefore, the connection can be completed only by clamping the connecting rod into the U-shaped buckle.

Furthermore, the invention at least adopts more than two detachable external connecting mechanisms, and at least two detachable external connecting mechanisms are distributed in equal height or staggered mode in the transverse direction. The dimension freedom of the external hanging type electric propulsion device in the horizontal direction is reduced, and the connection stability of the external hanging type electric propulsion device and a ship body is improved.

Furthermore, the navigation floating body is provided with a charging module connected with the power battery, the charging module comprises an electric quantity monitoring module, and the peripheral controller is provided with a low electric quantity warning device and an electric quantity display device which are electrically connected with the electric quantity monitoring module.

Furthermore, the two sailing floating bodies are connected through at least two detachable self-connecting mechanisms which are distributed in a horizontal equal height or staggered mode, the detachable self-connecting mechanisms are one of a spring buckle ring mechanism, a buckle mechanism, a loop bar mechanism, a mechanical locking mechanism and an electromagnetic locking mechanism, and the detachable self-connecting mechanisms comprise male end self-connecting mechanisms fixed on one sailing floating body and female end self-connecting mechanisms fixed on the other sailing floating body; or the detachable self-connecting mechanism comprises two connecting frames or connecting plates which are respectively fixed on the two sailing floating bodies, and the two connecting frames or the connecting plates are connected and fixed through bolts or binding ropes; and the detachable self-connecting mechanism and the detachable external connecting mechanism are arranged at two ends of a single navigation floating body at 180 degrees. The purpose of this design is to facilitate the exchange between two externally-mounted electric propulsion devices, the actual operation of which is as follows: when the electric energy of the externally-hung electric propulsion device A for driving the ship body to sail is reduced and needs to be replaced, a worker controls or personally drives the externally-hung electric propulsion device B to be close to the externally-hung electric propulsion device A, the tail parts of the externally-hung electric propulsion device A and the externally-hung electric propulsion device B are fixed through a detachable self-connecting mechanism, then the detachable self-connecting mechanism is detached, the externally-hung electric propulsion device A is separated from the ship body of the ship body, and meanwhile, a cable electric connector of an external controller is disconnected (the wireless mode has no problem); and then, the worker controls the externally-hung electric propulsion devices A and B to turn around for 180 degrees integrally, then the worker fixes the externally-hung electric propulsion device B and the ship body through a detachable externally-connected mechanism and is connected with an electric connector of an external controller, and finally the worker controls or returns the externally-hung electric propulsion device A to drive and return by oneself.

The wired connection mode of the peripheral controller and the electric propeller driver in the invention refers to that the communication lines of the peripheral controller and the electric propeller driver are directly connected in a cable mode with an electric connector, and the wireless connection mode refers to that the remote connection control is carried out through infrared communication and radio communication or by means of the existing network communication modes such as wifi, 4G, 5G and the like.

The invention has the advantages that:

1) the invention relates to an independent external hanging device which can be used as a navigation power device of any existing ship, in particular to a fuel oil driving device which can be closed after a fuel oil motor ship is applied to the fuel oil motor ship, so that zero-emission noiseless work is realized, and the pollution problem and the noise problem of the existing ship are well solved. The invention can effectively solve the problem of endurance after being applied to the existing electric ship with the built-in battery, and can continuously provide sailing driving force for the ship body and reduce the cost investment for purchasing and replacing the expensive built-in battery for the ship because of the characteristic of quick replacement.

2) The invention can be widely applied to the prior ships in any water areas such as inland rivers, lakes, reservoirs and the like, has wide application range, can gradually reduce the use of the prior fuel oil motor ship particularly after being applied to the ship body of an unpowered ship, and well solves the pollution problem and the noise problem of the prior ship.

3) Compared with the ship driven by the invention, the traditional fuel oil motor ship has the advantage that the annual operation cost is greatly saved on the premise of the same power (driving power) and use conditions (round-trip times and round-trip voyage). Taking an existing 800-ton diesel engine-driven ship as an example, two 200kw diesel engines are adopted, and if the external electric propulsion device of the scheme is provided with two 200kw motors as power (electric propellers), and is equipped with 16 groups of batteries to supply power to each motor, each group of batteries has 100 degrees of electricity, and the value is 10 ten thousand yuan, so the energy consumption cost of the two motors is compared as shown in the following table:

Figure RE-GDA0002306534290000051

as can be seen from the above table, the electricity cost per unit mileage is about 28% of the oil cost, and the saving is about 72%. Each group of batteries has 100 DEG electricity and the value is 10 ten thousand yuan, and each electric propeller of the external electric propulsion device is provided with 16 groups of batteries, and the total value is 160 ten thousand yuan. The value of 16 groups of batteries is 160 ten thousand yuan, and the depreciation cost of each year is 80 ten thousand yuan according to the calculation of 3000 times of the service life of the batteries. The ship driven by the invention can save about 174 ten thousand yuan each year by operating for 300 days in one year.

4) When the invention is actually used, only a small change is made on the hull of the existing ship, the female end connecting mechanism or the connecting plate or the connecting bracket of the quick-dismantling external connecting mechanism is added, and the external controller is added, so that the invention has low transformation cost and is easy to implement and popularize.

5) When the invention is used, the power and the operating mechanism of the existing ship body are not changed, and when the externally-hung electric propulsion device is not used, the ship can still sail freely and is still driven by the original driver without being operated by professional personnel.

6) The invention is very convenient to butt joint, assemble and disassemble with the hull of the existing ship, and can be replaced in several minutes almost without stopping the ship, thereby greatly improving the endurance.

7) Compared with the existing electric ship with the built-in battery, the ship body is provided with the independent external hanging device, so that the ship body can be separated without endangering the ship body in case of accidental fire or even explosion of the power battery in the ship body.

Drawings

The invention is further described with reference to the following figures and examples:

FIG. 1 is a front view of the structure of one embodiment of the present invention;

FIG. 2 is a schematic perspective view of the embodiment of FIG. 1 (omitting the peripheral controller);

FIG. 3 is a schematic diagram of the single perspective structure of the electric propeller of the embodiment of FIG. 1;

FIG. 4 is a sectional view of the motorized propeller of the embodiment of FIG. 1 in isolation;

FIG. 5 is a front view of the embodiment of FIG. 1 in use on a current boat hull (with the peripheral controller omitted);

FIG. 6 is a schematic perspective view of FIG. 5 (omitting peripheral controller);

FIG. 7 is a schematic perspective view of two navigational floats in a 180 degree docking state;

FIG. 8 is a perspective view of a second embodiment of a detachable coupling mechanism;

FIG. 9 is a perspective view of a third embodiment of a detachable coupling mechanism;

FIG. 10 is a perspective view of a detachable external connection mechanism in a fourth embodiment;

fig. 11 is a perspective view of a detachable external connection mechanism in a fifth embodiment.

Wherein: 1. sailing the floating body; 1a, a cockpit; 1b, a transverse bridge; 1c, a boat-shaped floating body; 2. an electric propeller; 3. a power battery; 4. a hull; 5. a peripheral controller; 6. a steering rudder; 7. a propeller; 8. A housing; 9. a propeller drive motor; 10. a planetary gear reduction mechanism; 11. a propeller drive longitudinal axis; 12. the propeller drives the cross shaft; 13. a bevel gear transmission mechanism; 14. a steering rudder drive motor; 15. a steering rudder connecting shaft; 16. a steering worm gear; 17. a steering worm; 18. a connecting rod; 19. a U-shaped buckle; 20. An electrical connector; 21. a spring snap ring body; 21a, a U-shaped retaining ring; 21b, an elastic overturning block; 22. an X-shaped clamp body; 23. a clamp body opening and closing motor; 24. a nut block; 25. a pivotal shaft; 26. a U-shaped lock hook; 27. An electric lead screw pair; 28. a central support; 29. a gear drive motor; 30. a gear; 31. a rack guide rail; 32. a rack.

Detailed Description

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