阅读说明：本技术 一种速比可调智能行星减速机 (Intelligent planetary reducer with adjustable speed ratio ) 是由 安利书 于 2021-09-02 设计创作，主要内容包括：本发明公开了一种速比可调智能行星减速机,涉及减速机技术领域,包括输入法兰、输入连接法兰、连接法兰和输出法兰；输入连接法兰内靠近输入端安装有输入轴；输入轴输出端固定连接有输入连接轴；输入连接法兰内靠近输出端固定安装有电磁离合器；输入连接法兰输出端固定安装有电磁制动器,衔铁连接轴组件从电磁制动器内穿过且通过平键与电磁制动器的摩擦片连接；连接法兰内还安装有输入齿圈组件和输出齿圈组件,输入齿圈组件与输出齿圈组件之间安装有与其配合的行星架组件。本发明通过信号控制实现减速机多种状态输出：减速输出、等速输出、自由状态、抱死状态,功能多,能够满足不同的使用工况。(The invention discloses an intelligent planetary reducer with an adjustable speed ratio, which relates to the technical field of reducers and comprises an input flange, an input connecting flange, a connecting flange and an output flange; an input shaft is arranged in the input connecting flange and close to the input end; the output end of the input shaft is fixedly connected with an input connecting shaft; an electromagnetic clutch is fixedly arranged in the input connecting flange and close to the output end; an electromagnetic brake is fixedly installed at the output end of the input connecting flange, and the armature connecting shaft assembly penetrates through the electromagnetic brake and is connected with a friction plate of the electromagnetic brake through a flat key; an input gear ring component and an output gear ring component are further installed in the connecting flange, and a planet carrier assembly matched with the input gear ring component and the output gear ring component is installed between the input gear ring component and the output gear ring component. The invention realizes the output of various states of the speed reducer through signal control: the speed reduction output, the constant speed output, the free state and the locking state have multiple functions and can meet different use conditions.)

1. The intelligent planetary speed reducer with the adjustable speed ratio is characterized by comprising an input flange (1), an input connecting flange (2), a connecting flange (12) and an output flange (18), wherein the input flange (1), the input connecting flange (2), the connecting flange (12) and the output flange (18) are fixedly connected from an input end to an output end in sequence;

an input shaft (6) is arranged in the input connecting flange (2) and close to the input end, and the input shaft (6) is rotatably connected with the input connecting flange (2) through a first bearing (4); the outer end of the input shaft (6) extends into the input flange (1), the input shaft (6) is a hollow shaft, and a key groove is formed in the input shaft (6); the output end of the input shaft (6) is fixedly connected with an input connecting shaft (7);

an electromagnetic clutch (9) is fixedly mounted in the input connecting flange (2) and close to the output end, the electromagnetic clutch (9) comprises a clutch coil base (91), a clutch baffle (92) and an armature connecting shaft assembly (93), the input connecting shaft (7) penetrates through the electromagnetic clutch (9) and is connected with the clutch baffle (92) through a flat key, and the input connecting shaft (7) is further rotatably connected with the armature connecting shaft assembly (93) through a second bearing (8); an electromagnetic brake (11) is fixedly installed at the output end of the input connecting flange (2), and the armature connecting shaft assembly (93) penetrates through the electromagnetic brake (11) and is connected with a friction plate of the electromagnetic brake (11) through a flat key;

an input gear ring component (13) and an output gear ring component (16) are further mounted in the connecting flange (12), the input gear ring component (13) comprises an input gear connecting shaft (131), a third bearing (132), an input bearing (133) and an input gear ring (134), the input gear connecting shaft (131) is fixedly connected with the input gear ring (134), the input gear connecting shaft (131) and the input gear ring (134) are rotatably connected with the connecting flange (12) through the input bearing (133), and the armature connecting shaft component (93) extends into the input gear connecting shaft (131) and is connected with the input gear connecting shaft (131) through a flat key; the output gear ring assembly (16) comprises an output gear ring (161), an output bearing (162), a sixth bearing (163), a seventh bearing (164) and an output shaft (165), the output gear ring (161) is fixedly connected with the output shaft (165), the output gear ring (161) and the output shaft (165) are rotatably connected with the connecting flange (12) through the output bearing (162), the output shaft (165) penetrates through the output flange (18) to extend out of the output flange (18), and the output shaft (165) is rotatably connected with the output flange (18) through an eighth bearing (17); a planet carrier assembly (14) matched with the input gear ring assembly (13) is mounted between the input gear ring assembly (13) and the output gear ring assembly (16), the planet carrier assembly (14) comprises an intermediate disc (141), a sun gear (144) and planet gears (147), two ends of the intermediate disc (141) are respectively in rotating connection with an input gear connecting shaft (131) and an output shaft (165) through a third bearing (132) and a sixth bearing (163), rollers (148) are arranged on the outer ring of the intermediate disc (141), the planet gears (147) are sleeved on the rollers (148) and are in rotating connection with the rollers (148) through needle rollers (146), and the planet gears (147) are respectively meshed with the input gear ring (134) and the output gear ring (161); the sun wheel (144) is positioned at the center of the intermediate disk (141), two ends of the intermediate disk (141) are respectively and rotatably connected with the intermediate disk (141) through a fourth bearing (143) and a fifth bearing (145), and the sun wheel (144) is meshed with the planet wheel (147); the input connecting shaft (7) penetrates through the sun gear (144) and is connected with the sun gear (144) through a flat key.

2. The intelligent planetary reducer with the adjustable speed ratio of claim 1, wherein the input connecting flange (2) and the connecting flange (12) are both provided with oil filling holes, and the oil filling holes are provided with oil plugs (20) matched with the oil filling holes.

3. The intelligent planetary reducer with the adjustable speed ratio of claim 1, wherein the input shaft (6) is embedded with a first shaft elastic retainer ring (3) matched with the outer end of the first bearing (4), and the input connecting flange (2) is embedded with a first hole elastic retainer ring (5) matched with the inner end of the first bearing (4).

4. The intelligent planetary reducer with the adjustable speed ratio of claim 3, wherein the input connecting shaft (7) is further embedded with a second shaft elastic retainer ring (10) matched with the armature connecting shaft assembly (93).

5. The intelligent planetary reducer with the adjustable speed ratio according to any one of claims 1-4, wherein a lead of the electromagnetic brake (11) passes through the input connecting flange (2) and extends out of the input connecting flange (2), a through hole for the lead of the electromagnetic brake (11) to pass through is formed in the input connecting flange (2), and a nylon cable waterproof joint (19) is connected to the through hole.

6. The intelligent planetary reducer of claim 1, wherein the output shaft (165) has a threaded hole in the center.

7. The intelligent planetary reducer with the adjustable speed ratio as claimed in claim 1, wherein a retainer ring (15) is arranged between the input bearing (133) and the output bearing (162).

8. The intelligent planetary reducer of claim 5, wherein the intermediate disk (141) is further embedded with a second hole circlip (142) matched with the fourth bearing (143).

9. The intelligent planetary reducer with the adjustable speed ratio as claimed in claim 1, wherein the output end of the input connecting shaft (7) extends into the output shaft (165) and is rotatably connected with the output shaft (165) through a seventh bearing (164).

Technical Field

The invention relates to the technical field of speed reducers, in particular to an intelligent planetary speed reducer with an adjustable speed ratio.

Background

The planetary reducer is an industrial product with wide application, and can reduce the rotating speed of a motor and increase the output torque. The planetary reducer can be used as a matched component for industries such as hoisting, digging, transportation, building and the like.

At present, most of the planetary reducers on the market can only realize one reduction ratio transmission due to the limitation of mechanical structures. On the premise of meeting torque transmission, if a plurality of speed ratio transmissions or a plurality of states of the speed reducer are to be realized, the common speed reducer is difficult to meet; under the condition that the input motor normally operates, the load equipment cannot be repaired or maintained, and therefore efficiency is low.

Disclosure of Invention

The invention aims to provide an intelligent planetary reducer with an adjustable speed ratio, which aims to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme:

an intelligent planetary reducer with an adjustable speed ratio comprises an input flange, an input connecting flange, a connecting flange and an output flange, wherein the input flange, the input connecting flange, the connecting flange and the output flange are fixedly connected in sequence from an input end to an output end; an input shaft is arranged in the input connecting flange and close to the input end, and the input shaft is rotatably connected with the input connecting flange through a first bearing; the outer end of the input shaft extends into the input flange, the input shaft is a hollow shaft, and a key groove is formed in the input shaft; the output end of the input shaft is fixedly connected with an input connecting shaft; an electromagnetic clutch is fixedly installed in the input connecting flange close to the output end, the electromagnetic clutch comprises a clutch coil base, a clutch baffle and an armature connecting shaft assembly, the input connecting shaft penetrates through the electromagnetic clutch and is connected with the clutch baffle through a flat key, and the input connecting shaft is further rotatably connected with the armature connecting shaft assembly through a second bearing; the armature connecting shaft assembly penetrates through the electromagnetic brake and is connected with a friction plate of the electromagnetic brake through a flat key; the input gear ring assembly comprises an input gear connecting shaft, a third bearing, an input bearing and an input gear ring, the input gear connecting shaft is fixedly connected with the input gear ring, the input gear connecting shaft and the input gear ring are rotatably connected with the connecting flange through the input bearing, and the armature connecting shaft assembly extends into the input gear connecting shaft and is connected with the input gear connecting shaft through a flat key; the output gear ring component comprises an output gear ring, an output bearing, a sixth bearing, a seventh bearing and an output shaft, the output gear ring is fixedly connected with the output shaft, the output gear ring and the output shaft are rotatably connected with the connecting flange through the output bearing, the output shaft penetrates through the output flange and extends out of the output flange, and the output shaft is rotatably connected with the output flange through an eighth bearing; a planet carrier assembly matched with the input gear ring assembly is arranged between the input gear ring assembly and the output gear ring assembly, the planet carrier assembly comprises an intermediate disc, a sun gear and a planet gear, two ends of the intermediate disc are respectively and rotatably connected with the input gear connecting shaft and the output shaft through a third bearing and a sixth bearing, a roller is arranged on the outer ring of the intermediate disc, the planet gear is sleeved on the roller and is rotatably connected with the roller through a roller pin, and the planet gear is respectively meshed with the input gear ring and the output gear ring; the sun wheel is positioned at the center of the intermediate disc, two ends of the intermediate disc are respectively and rotatably connected with the intermediate disc through a fourth bearing and a fifth bearing, and the sun wheel is meshed with the planet wheel; the input connecting shaft penetrates through the sun gear and is connected with the sun gear through a flat key.

As a further scheme of the invention: the input connecting flange and the connecting flange are both provided with oil filling holes, and the oil filling holes are provided with oil plugs matched with the oil filling holes.

As a still further scheme of the invention: the input shaft is embedded with a first shaft elastic check ring matched with the outer end of the first bearing, and the input connecting flange is embedded with a first hole elastic check ring matched with the inner end of the first bearing.

As a still further scheme of the invention: and an elastic retainer ring for a second shaft matched with the armature connecting shaft assembly is also embedded on the input connecting shaft.

As a still further scheme of the invention: the wire of electromagnetic braking ware passes input flange and extends to outside the input flange, sets up the through-hole that supplies the electromagnetic braking ware wire to pass on the input flange and through-hole department is connected with nylon cable water joint.

As a still further scheme of the invention: the center of the output shaft is provided with a threaded hole.

As a still further scheme of the invention: and a check ring is arranged between the input bearing and the output bearing.

As a still further scheme of the invention: and the middle disc is also embedded with a second hole elastic check ring matched with the fourth bearing.

As a still further scheme of the invention: the output end of the input connecting shaft extends into the output shaft and is rotatably connected with the output shaft through a seventh bearing.

Compared with the prior art, the invention has the following beneficial effects:

1. through the cooperation of electromagnetic clutch, electromagnetic brake, planet transmission assembly and other connected parts, realize the multiple state output of speed reducer through signal control: the speed reduction output, the constant speed output, the free state and the locking state have multiple functions and high working efficiency, and can meet different use working conditions;

2. when the electromagnetic clutch and the electromagnetic brake are in the power-on state, the input and the output of the speed reducer are in the free state, so that the input motor can be conveniently maintained under the condition of normal operation, and the efficiency is high;

3. when the electromagnetic clutch is in a power-on state, the electromagnetic brake is in a power-off state, and the whole speed reducer is in a locking state, so that the speed reducer can conveniently realize a braking effect when the motor fails to brake;

4. the speed reducer realizes electromechanical integration, and has simple structure, strong controllability and good safety;

5. the output shaft of the speed reducer is provided with a central threaded hole, and an encoder can be installed after assembly to accurately control and monitor the output rotating speed of the speed reducer.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention.

Fig. 2 is a schematic diagram of an explosive structure according to an embodiment of the present invention.

Fig. 3 is an exploded view of the electromagnetic clutch according to the embodiment of the present invention.

Fig. 4 is an exploded view of the input ring gear assembly in an embodiment of the present invention.

FIG. 5 is an exploded view of the planet carrier assembly member in an embodiment of the present invention.

Fig. 6 is an exploded view of the output ring gear assembly in the embodiment of the present invention.

Fig. 7 is a schematic view of an assembly structure according to an embodiment of the present invention.

Notations for reference numerals: 1-input flange, 2-input connecting flange, 3-elastic retainer ring for first shaft, 4-first bearing, 5-elastic retainer ring for first hole, 6-input shaft, 7-input connecting shaft, 8-second bearing, 9-electromagnetic clutch, 91-clutch coil base, 92-clutch baffle, 93-armature connecting shaft component, 10-elastic retainer ring for second shaft, 11-electromagnetic brake, 12-connecting flange, 13-input gear ring component, 131-input gear connecting shaft, 132-third bearing, 133-input bearing, 134-input gear ring, 14-planet carrier component, 141-intermediate disk, 142-elastic retainer ring for second hole, 143-fourth bearing, 144-sun gear, 145-fifth bearing, 146-rolling needle, 147-planetary gear, 148-rolling roller, 15-retainer ring, 16-output gear ring component, 161-output gear ring, 162-output bearing, 163-sixth bearing, 164-seventh bearing, 165-output shaft, 17-eighth bearing, 18-output flange, 19-nylon cable waterproof joint and 20-oil plug.

Detailed Description

The present invention will be described in detail with reference to the following embodiments, wherein like or similar elements are designated by like reference numerals throughout the several views, and wherein the shape, thickness or height of the various elements may be expanded or reduced in practice. The examples are given solely for the purpose of illustration and are not intended to limit the scope of the invention. Any obvious modifications or variations can be made to the present invention without departing from the spirit or scope of the present invention.

Examples

Referring to fig. 1 to 7, in the embodiment of the invention, an intelligent planetary speed reducer with an adjustable speed ratio comprises an input flange 1, an input connecting flange 2, a connecting flange 12 and an output flange 18, wherein the input flange 1, the input connecting flange 2, the connecting flange 12 and the output flange 18 are fixedly connected in sequence from an input end to an output end, and an outer shell of the speed reducer is formed by the input flange 1, the input connecting flange 2, the connecting flange 12 and the output flange 18; the input connecting flange 2 and the connecting flange 12 are both provided with oil filling holes, and oil plugs 20 matched with the oil filling holes are arranged at the oil filling holes, so that lubricating oil can be conveniently added into the speed reducer;

an input shaft 6 is installed in the input connecting flange 2 close to the input end, the input shaft 6 is rotatably connected with the input connecting flange 2 through a first bearing 4, a first shaft elastic retainer ring 3 matched with the outer end of the first bearing 4 is embedded in the input shaft 6, the first bearing 4 and the input shaft 6 are relatively fixed through the first shaft elastic retainer ring 3, a first hole elastic retainer ring 5 matched with the inner end of the first bearing 4 is embedded in the input connecting flange 2, the first bearing 4 and the input connecting flange 2 are relatively fixed through the first hole elastic retainer ring 5, and the input shaft 6 and the input connecting flange 2 are relatively fixed through the matching of the first shaft elastic retainer ring 3 and the first hole elastic retainer ring 5, so that the speed reducer is conveniently installed; the outer end of the input shaft 6 extends into the input flange 1, the input shaft 6 is a hollow shaft, and a key groove is formed in the input shaft 6; the output shaft of the motor is inserted into the input shaft 6 from the input flange 1 and connected through a flat key, so that the input shaft 6 can be driven to rotate; the output end of the input shaft 6 is fixedly connected with an input connecting shaft 7;

an electromagnetic clutch 9 is fixedly mounted in the input connecting flange 2 and close to the output end, the electromagnetic clutch 9 comprises a clutch coil base 91, a clutch baffle 92 and an armature connecting shaft assembly 93, the input connecting shaft 7 penetrates through the electromagnetic clutch 9 and is connected with the clutch baffle 92 through a flat key, and the input connecting shaft 7 is further rotatably connected with the armature connecting shaft assembly 93 through a second bearing 8; when the input connecting shaft 7 rotates, the clutch baffle 92 is driven to rotate, and when the electromagnetic clutch 9 is electrified, the clutch baffle 92 drives the armature connecting shaft assembly 93 to rotate; the input connecting shaft 7 is also embedded with a second shaft elastic retainer ring 10 matched with the armature connecting shaft assembly 93, and the positions of the electromagnetic clutch 9 and the input connecting shaft 7 are relatively fixed through the second shaft elastic retainer ring 10; an electromagnetic brake 11 is fixedly installed at the output end of the input connecting flange 2, a dry type single-plate brake is preferably selected as the electromagnetic brake 11, a lead of the electromagnetic brake 11 penetrates through the input connecting flange 2 and extends out of the input connecting flange 2, a through hole for the lead of the electromagnetic brake 11 to penetrate through is formed in the input connecting flange 2, and a nylon cable waterproof joint 19 is connected to the through hole; the armature connecting shaft assembly 93 penetrates through the electromagnetic brake 11 and is connected with a friction plate of the electromagnetic brake 11 through a flat key;

an input gear ring component 13 and an output gear ring component 16 are further mounted in the connecting flange 12, the input gear ring component 13 comprises an input gear connecting shaft 131, a third bearing 132, an input bearing 133 and an input gear ring 134, the input gear connecting shaft 131 is fixedly connected with the input gear ring 134, the input gear connecting shaft 131 and the input gear ring 134 are rotatably connected with the connecting flange 12 through the input bearing 133, the armature connecting shaft component 93 extends into the input gear connecting shaft 131 and is connected with the input gear connecting shaft 131 through a flat key, and the armature connecting shaft component 93 rotates to drive the input gear connecting shaft 131 to rotate; the output ring gear assembly 16 comprises an output ring gear 161, an output bearing 162, a sixth bearing 163, a seventh bearing 164 and an output shaft 165, wherein the output ring gear 161 is fixedly connected with the output shaft 165, the output ring gear 161 and the output shaft 165 are rotatably connected with the connecting flange 12 through the output bearing 162, the output shaft 165 penetrates through the output flange 18 and extends out of the output flange 18, and the output shaft 165 is rotatably connected with the output flange 18 through an eighth bearing 17; a threaded hole is formed in the center of the output shaft 165, and an encoder can be mounted after assembly to accurately control and monitor the output rotating speed of the speed reducer; a retainer ring 15 is arranged between the input bearing 133 and the output bearing 162, and the retainer ring 105 abuts against the outer rings of the input gear ring 134 and the output bearing 162 to prevent the input gear ring assembly 13 and the planet carrier assembly 14 from shaking during rotation, so that the input gear ring assembly 13 and the planet carrier assembly 14 are more stable during rotation; a planet carrier assembly 14 matched with the input ring gear assembly 13 is installed between the input ring gear assembly 13 and the output ring gear assembly 16, the planet carrier assembly 14 comprises an intermediate disc 141, a sun gear 144 and planet wheels 147, two ends of the intermediate disc 141 are respectively and rotatably connected with an input gear connecting shaft 131 and an output shaft 165 through a third bearing 132 and a sixth bearing 163, the outer ring of the intermediate disc 141 is provided with rollers 148, the planet wheels 147 are sleeved on the rollers 148 and are rotatably connected with the rollers 148 through needle rollers 146, and the planet wheels 147 are respectively meshed with the input ring gear 134 and the output ring gear 161; the sun gear 144 is located at the center of the intermediate disk 141, two ends of the intermediate disk 141 are respectively connected with the intermediate disk 141 through a fourth bearing 143 and a fifth bearing 145 in a rotating manner, and the sun gear 144 is meshed with the planet gear 147; a second hole circlip 142 matched with the fourth bearing 143 is further embedded in the intermediate disc 141, and the position of the sun gear 144 in the intermediate disc 141 is kept relatively fixed through the second hole circlip 142; thus, the input ring gear assembly 13, the planet carrier assembly member 14 and the output ring gear assembly 16 constitute a planetary transmission assembly; the input connecting shaft 7 penetrates through the sun gear 144 and is connected with the sun gear 144 through a flat key, and the input connecting shaft 7 rotates to drive the sun gear 144 to rotate; the output end of the input connecting shaft 7 extends into the output shaft 165 and is rotatably connected with the output shaft 165 through the seventh bearing 164, so that the input connecting shaft 7 rotates more stably.

The speed reducer mainly comprises an electromagnetic clutch 9, an electromagnetic brake 11, a planetary transmission assembly and other connecting parts; the electromagnetic clutch 9 and the electromagnetic brake 11 are connected in series through the input connecting shaft 7 and the armature connecting shaft assembly 93, and the planetary transmission assembly is connected with the electromagnetic clutch 9 and the electromagnetic brake 11 through the input connecting shaft 7; the electromagnetic clutch 9 controls the armature connecting shaft assembly 93 to be attached or detached, and the electromagnetic brake 11 controls the armature connecting shaft assembly 93 connected with the electromagnetic brake to rotate or brake, so that the input gear connecting shaft 131 is controlled to rotate or be fixed, and the input gear ring 134 rotates or is fixed, so that different speed ratio outputs are met;

when the electromagnetic clutch 9 and the electromagnetic brake 11 are in the power-off state at the same time, the electromagnetic brake 11 does not work and is in the locking state, and the armature connecting shaft assembly 93 and the input gear connecting shaft 131 (the input gear ring 134) connected with the electromagnetic brake are also in the braking state; when the electromagnetic clutch 9 does not work, the clutch baffle 92 is separated from the armature connecting shaft assembly 93; the speed reducer outputs speed reduction at the moment;

when the electromagnetic clutch 9 and the electromagnetic brake 11 are in the energized state at the same time, the electromagnetic brake 11 works, the friction plates can freely rotate, and the armature connecting shaft assembly 93 and the input gear connecting shaft 131 (the input gear ring 134) connected with the electromagnetic brake are also in the free state; when the electromagnetic clutch 9 works, the armature connecting shaft assembly 93 is sucked, the clutch baffle 92 is rubbed, and the input connecting shaft 7 and the armature connecting shaft assembly 93 are tightly held at the same rotating speed; the speed reducer outputs at a constant speed;

when the electromagnetic clutch 9 is in a power-off state and the electromagnetic brake 11 is in a power-on state, the electromagnetic brake 11 works, the friction plate can freely rotate, and the armature connecting shaft assembly 93 and the input gear connecting shaft 131 (the input gear ring 134) which are connected with the electromagnetic brake are also in a free state; when the electromagnetic clutch 9 does not work, the clutch baffle 92 is separated from the armature connecting shaft assembly 93, and the input and output of the speed reducer are in a free state at the moment, so that the input motor can be conveniently maintained under the condition of normal operation, and the efficiency is high;

when the electromagnetic clutch 9 is in an energized state, the electromagnetic brake 11 is in a de-energized state, the electromagnetic brake 11 does not work and is in a locked state, and the armature connecting shaft assembly 93 and the input gear connecting shaft 131 (the input gear ring 134) connected with the electromagnetic brake are also in a braking state; the electromagnetic clutch 9 works to suck the armature connecting shaft assembly 93, the clutch baffle 92 is rubbed, the input connecting shaft 7 and the armature connecting shaft assembly 93 are tightly held and in a braking state at the moment, the whole speed reducer is in a locking state, and the speed reducer can realize a braking effect when the motor is conveniently braked and loses efficacy.

In conclusion, the electromagnetic clutch 9, the electromagnetic brake 11 and the planetary speed reducing mechanism are combined together, and the output of multiple states of the speed reducer is realized through signal control: the speed reducer has the advantages of speed reduction output, constant speed output, free state and locking state, multiple functions, high working efficiency, capability of meeting different use working conditions and realizing mechanical and electrical integration, and the speed reducer is simple in structure, strong in controllability and good in safety.

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

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.