CN218231779U - Slewing mechanism, slewing device and engineering machinery - Google Patents

Abstract

The utility model provides a rotation mechanism, slewer and engineering machine tool belongs to engineering machine tool technical field. The slewing mechanism comprises a first platform, a second platform, an induction switch assembly and an assembly to be induced; the induction switch assembly comprises a first induction switch and a second induction switch, and the to-be-induced assembly comprises a first limit to-be-induced piece and a second limit to-be-induced piece; the first limit waiting induction piece is positioned on the rotating track of the first induction switch, and the second limit waiting induction piece is positioned on the rotating track of the second induction switch. This rotation mechanism realizes that first platform can only treat the reciprocal rotation between the response piece at first limit and the response piece is treated to the second limit, has injectd rotation angle, compares in traditional adoption rotary encoder control rotation angle, the utility model discloses a rotation mechanism cost is lower, and the reliability is higher.

Description

Slewing mechanism, slewing device and engineering machinery

Technical Field

The utility model relates to an engineering machine tool technical field particularly, relates to a rotation mechanism, slewer and engineering machine tool.

Background

The high-altitude operation vehicle is a vehicle which is more than 3 meters and is controlled by a hydraulic or electric system to perform lifting operation or rotary operation. When the traditional overhead working truck works, the danger of collision of the truck head exists when the truck revolves leftwards to the limit position or revolves rightwards to the limit position; furthermore, without a central swivel joint, the infinite swivel can tear the tubing or cable.

In order to solve the above problems, the swing mechanism of the existing aerial work vehicle is usually provided with a rotary encoder to control the swing angle, but the cost is high and the swing mechanism is not easy to replace.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving current rotation mechanism and adopt rotary encoder control angle of revolution to lead to the higher problem of cost.

The utility model provides a swing mechanism, which comprises a first platform, a second platform, an inductive switch component and a component to be induced;

the first platform is rotatably connected with the second platform, the inductive switch assembly is arranged on the first platform, the component to be induced is arranged on the second platform, the inductive switch assembly comprises a first inductive switch and a second inductive switch, and the component to be induced comprises a first limit component to be induced and a second limit component to be induced;

the first limit waiting induction piece is located on a rotation track of the first induction switch, the second limit waiting induction piece is located on a rotation track of the second induction switch, and when the first induction switch rotates to a position corresponding to the first limit waiting induction piece, the second induction switch and the second limit waiting induction piece are arranged in a staggered mode.

The utility model provides a pair of rotation mechanism compares in prior art, has but not be limited to following beneficial effect:

the second platform may be fixed, the first platform may be capable of rotating relative to the second platform, and the first platform may be connected to an external working component, for example, the working component is a boom, and the boom may be capable of performing a swing motion through the swing mechanism. Because the piece of treating the response is located first inductive switch's rotation track is treated to first limit, along with the rotation of first platform, when first inductive switch clockwise rotation to treat the piece corresponding position with first limit, first inductive switch sensed first limit and treats the piece of treating the response this moment, this position can regard as clockwise rotation extreme position, first platform can not continue clockwise rotation any more, but because when first inductive switch rotates to treating the piece corresponding position department with first limit, the second inductive switch treats the position dislocation of piece of response with the second limit mutually, therefore the second inductive switch does not sense the second limit this moment and treats the piece of treating the response, then can anticlockwise rotation. Similarly, because the second limit is treated the response piece and is located second inductive switch's rotation orbit, along with the rotation of first platform, when second inductive switch anticlockwise rotation to treat the response piece corresponding position with the second limit, this moment second inductive switch senses the second limit and treats the response piece, this position can regard as anticlockwise rotation limit position, first platform can not continue anticlockwise rotation again, but because when first inductive switch rotates to treating the corresponding position department of response piece with first limit, the position that the response piece was treated to second inductive switch and second limit misplaces mutually, consequently first inductive switch does not sense first limit at this moment and treats the response piece, then can clockwise rotation. So, realize that first platform can only treat the response piece and the reciprocal rotation between the response piece is treated to the second limit at first limit, has injectd rotation angle, compares in traditional adoption rotary encoder control rotation angle, the utility model discloses a rotation mechanism cost is lower, and the reliability is higher.

Furthermore, the to-be-sensed assembly further comprises a first middle to-be-sensed member and a second middle to-be-sensed member, the first middle to-be-sensed member and the second middle to-be-sensed member are respectively arranged on the second platform, and the first middle to-be-sensed member and the second middle to-be-sensed member are both located on the same side of the direction from the first limit to-be-sensed member to the second limit to-be-sensed member;

and the first middle position part to be sensed and the second middle position part to be sensed are respectively positioned on different concentric circles of the second platform, the first middle position part to be sensed is positioned on the rotating track of the first sensing switch, and the second middle position part to be sensed is positioned on the rotating track of the second sensing switch.

Further, the first middle position part to be sensed and the second middle position part to be sensed are located on the same radius direction of the second platform.

Furthermore, the second platform comprises a second platform main body, a first connecting lug, a second connecting lug and a middle connecting lug, the first connecting lug, the middle connecting lug and the second connecting lug are sequentially arranged at different circumferential positions of the second platform main body respectively, the first platform comprises a first platform main body and a third connecting lug which are connected with each other, the first limit is set at the first connecting lug, the second limit is set at the second connecting lug, the first middle limit is set at the middle connecting lug, and the sensing switch assembly is set at the third connecting lug.

Further, rotation mechanism still includes warning device, warning device includes first warning device and second warning device, works as first inductive switch rotate to with the first limit is waited when the corresponding position department of response piece, first warning device is used for work, works as second inductive switch rotate to with the second limit is waited when the corresponding position department of response piece, second warning device is used for work, works as first inductive switch rotate to with the corresponding position department of response piece is waited to first meso position, just second inductive switch rotate to with the second meso position is waited when the corresponding position department of response piece, first warning device with second warning device is used for work simultaneously.

Further, the first inductive switch is a travel switch or a proximity switch, and the first inductive switch is the travel switch or the proximity switch.

The utility model also provides a slewer, include as before rotation mechanism, still include automobile body, working part and actuating mechanism, rotation mechanism's second platform install in the automobile body, working part install in rotation mechanism's first platform, actuating mechanism with first platform drive is connected, actuating mechanism is electric drive mechanism or hydraulic drive mechanism.

Further, the hydraulic driving mechanism comprises an electromagnetic valve, the electromagnetic valve is provided with a left-turn coil and a right-turn coil, the first inductive switch is used for switching on the left-turn coil or the first warning device, and the second inductive switch is used for switching on the right-turn coil or the second warning device.

Further, the turning device further comprises a forced switch for switching on the left-turn coil or the right-turn coil.

The utility model also provides an engineering machine, include as before rotation mechanism or as before slewer.

Since the technical improvement and the beneficial effects of the engineering machine are the same as those of the slewing mechanism or the slewing device, the engineering machine is not described again.

Drawings

Fig. 1 is a first schematic structural diagram of a swing mechanism according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a swing mechanism according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the connection circuit of the first inductive switch, the second inductive switch and the solenoid valve, wherein (a) is a schematic diagram of the connection circuit in which neither the left turn coil nor the right turn coil of the solenoid valve is energized, (b) is a schematic diagram of the connection circuit in which the left turn coil of the solenoid valve is not energized and the right turn coil is energized, (c) is a schematic diagram of the connection circuit in which the left turn coil of the solenoid valve is energized and the right turn coil is not energized, and (d) is a schematic diagram of the connection circuit in which both the left turn coil and the right turn coil of the solenoid valve are energized.

Description of the reference numerals:

1. a first platform; 11. a first platform body; 12. a third engaging lug; 2. a second platform; 21. a second platform body; 22. a first connecting lug; 23. a second engaging lug; 24. a middle connecting lug; 31. a first inductive switch; 32. a second inductive switch; 41. a first limit member to be sensed; 42. a second limit sensing part; 51. a first middle part to-be-sensed part; 52. a second middle part to-be-sensed part; 61. a first warning device; 62. a second warning device; 71. a left turn coil; 72. a right turn coil; 8. and (4) forced switching.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.

In the description of the present invention, it is to be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are merely for convenience of description of the present invention and simplification of description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Also, in the drawings, the Z-axis indicates a vertical, i.e., up-down position, and a positive direction of the Z-axis (i.e., an arrow direction of the Z-axis) indicates up, and a negative direction of the Z-axis (i.e., a direction opposite to the positive direction of the Z-axis) indicates down. It should also be noted that the foregoing Z-axis representation is merely intended to facilitate the description of the invention and to simplify the description, and does not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the invention.

Referring to fig. 1-2, a swing mechanism according to an embodiment of the present invention includes a first platform 1, a second platform 2, an inductive switch assembly, and an assembly to be induced;

the first platform 1 is rotatably connected with the second platform 2, the inductive switch assembly is arranged on the first platform 1, the component to be induced is arranged on the second platform 2, the inductive switch assembly comprises a first inductive switch 31 and a second inductive switch 32, and the component to be induced comprises a first limit component to be induced 41 and a second limit component to be induced 42;

the first limit waiting sensing element 41 is located on the rotation track of the first sensing switch 31, the second limit waiting sensing element 42 is located on the rotation track of the second sensing switch 32, and when the first sensing switch 31 rotates to a position corresponding to the first limit waiting sensing element 41, the second sensing switch 32 and the second limit waiting sensing element 42 are arranged in a staggered manner.

In this embodiment, the second platform 2 may be fixed, the first platform 1 may rotate relative to the second platform 2, and the first platform 1 may be connected to an external working component, for example, the working component is a boom, and the boom may rotate through the rotation mechanism. Because the first limit waiting sensing part 41 is located on the rotation track of the first sensing switch 31, along with the rotation of the first platform 1, when the first sensing switch 31 rotates clockwise to the position corresponding to the first limit waiting sensing part 41, the first sensing switch 31 senses the first limit waiting sensing part 41, the position can be taken as the clockwise rotation limit position (or called as the left limit position), the first platform 1 can not rotate clockwise any more, but when the first sensing switch 31 rotates to the position corresponding to the first limit waiting sensing part 41, the positions of the second sensing switch 32 and the second limit waiting sensing part 42 are dislocated, so that the second sensing switch 32 does not sense the second limit waiting sensing part 42 at this time, and the counterclockwise rotation can be realized.

Similarly, since the second limit waiting sensing element 42 is located on the rotation track of the second sensing switch 32, along with the rotation of the first platform 1, when the second sensing switch 32 rotates counterclockwise to the position corresponding to the second limit waiting sensing element 42, the second sensing switch 32 senses the second limit waiting sensing element 42, the position can be regarded as the counterclockwise rotation limit position (or called as the right limit position), the first platform 1 can not rotate counterclockwise any more, but because when the first sensing switch 31 rotates to the position corresponding to the first limit waiting sensing element 41, the positions of the second sensing switch 32 and the second limit waiting sensing element 42 are dislocated, and therefore, at this time, the first sensing switch 31 does not sense the first limit waiting sensing element 41, and can rotate clockwise. So, realize that first platform 1 can only treat the reciprocal rotation between response 41 and the response 42 at first limit, has injectd rotation angle, compares in traditional adoption rotary encoder control rotation angle, the utility model discloses a rotation mechanism cost is lower, and the reliability is higher.

Referring to fig. 1-2, the to-be-sensed assembly further includes a first middle to-be-sensed piece 51 and a second middle to-be-sensed piece 52, the first middle to-be-sensed piece 51 and the second middle to-be-sensed piece 52 are respectively disposed on the second platform 2, and the first middle to-be-sensed piece 51 and the second middle to-be-sensed piece 52 are both located on the same side of the direction from the first limit to-be-sensed piece 41 to the second limit to-be-sensed piece 42;

the first middle to-be-sensed piece 51 and the second middle to-be-sensed piece 52 are respectively located on different concentric circles of the second platform 2, the first middle to-be-sensed piece 51 is located on a rotation track of the first sensing switch 31, and the second middle to-be-sensed piece 52 is located on a rotation track of the second sensing switch 32.

In this embodiment, along with the rotation of the first platform 1 relative to the second platform 2, when the position of the first inductive switch 31 corresponds to the position of the first middle to-be-sensed member 51, the position of the second inductive switch 32 also corresponds to the position of the second middle to-be-sensed member, at this time, the first inductive switch 31 senses the first middle to-be-sensed member 51, and at the same time, the second inductive switch 32 senses the second middle to-be-sensed member 52, and this position can be used as a centering position (or referred to as a zero position, an angle is a positive value when the first platform rotates clockwise from this position toward the first extreme to-be-sensed member 41, and conversely, an angle is a negative value when the second platform rotates clockwise from this position toward the second extreme to-be-sensed member 42), which indicates that the first platform 1 is located at an intermediate angle position of the rotation angle range, and takes the example that the first platform 1 is connected to the boom, and when the first platform 1 is located at the centering position, it indicates that the boom is located at the initial centering position.

When the first platform 1 is at the centering position, that is, the first inductive switch 31 senses the first middle position to-be-sensed part 51, and the second inductive switch 32 senses the second middle position to-be-sensed part 52, at this time, the first platform 1 may be stopped, and if the first platform is to continue to rotate, the driving mechanism may continue to drive the first platform 1 to rotate through the external force switch 8.

In addition, because the first middle position waiting sensing part 51 and the second middle position waiting sensing part 52 are respectively located on different concentric circles of the second platform 2, and correspondingly, the first sensing switch 31 and the second sensing switch 32 are also located on different concentric circles of the first platform 1, it is ensured that the first sensing switch 31 does not sense the second middle position waiting sensing part 52, and the second sensing switch 32 does not sense the first middle position waiting sensing part 51, so that when the middle position is centered, the driving mechanism is forced to drive the first platform 1 to rotate only once.

Referring to fig. 1-2, optionally, the second platform 2 includes a second platform main body 21, a first connection lug 22, a second connection lug 23, and a middle connection lug 24, the first connection lug 22, the middle connection lug 24, and the second connection lug 23 are respectively and sequentially disposed at different circumferential positions of the second platform main body 21, the first platform 1 includes a first platform main body 11 and a third connection lug 12 that are connected to each other, the first limit sensing-waiting part 41 is disposed at the first connection lug 22, the second limit sensing-waiting part 42 is disposed at the second connection lug 23, the first middle sensing-waiting part 51 and the second middle sensing-waiting part 52 are respectively disposed at the middle connection lug 24, and the sensing switch assembly is disposed at the third connection lug 12.

In this embodiment, the first connecting lug 22 provides a carrier for the installation of the first limit waiting sensing element 41, the second connecting lug 23 provides a carrier for the installation of the second limit waiting sensing element 42, the middle position connecting lug 24 provides a carrier for the installation of the first middle position waiting sensing element 51 and the second middle position waiting sensing element 52, and the third connecting rod provides a carrier for the installation of the first sensing switch 31 and the second sensing switch 32, so that the situation that the sensing switch cannot accurately detect a new corresponding waiting sensing element due to interference of the platform body during the rotation motion is ensured.

Wherein, first inductive switch 31 and second inductive switch 32 can be dismantled with third engaging lug 12 and be connected, and the inductor 41 can be dismantled with first engaging lug 22 and be connected to the first limit is treated to the first limit, and the inductor 42 can be dismantled with second engaging lug 23 and be connected to the second limit, and the inductor 51 is treated to first meso position and the inductor 52 is treated to the second meso position can be dismantled with meso position engaging lug 24 respectively and be connected, convenient maintenance, change.

Referring to fig. 1 to 2, optionally, the first middle waiting sensing element 51 and the second middle waiting sensing element 52 are located in the same radial direction of the second platform 2.

In this embodiment, since the first middle position waiting sensing element 51 and the second middle position waiting sensing element 52 are located on the same radius of the second platform 2, and correspondingly, the first sensing switch 31 and the second sensing switch 32 are also located on the same radius direction of the first platform 1, then, the first middle position waiting sensing element 51 and the second middle position waiting sensing element 52 may be disposed on the same engaging lug, that is, simultaneously disposed on the middle position engaging lug 24, and similarly, the first sensing switch 31 and the second sensing switch 32 may be simultaneously disposed on the third engaging lug 12, so as to reduce the number of the engaging lugs.

Referring to fig. 3, optionally, the slewing mechanism further includes a warning device, the warning device includes a first warning device 61 and a second warning device 62, when the first inductive switch 31 rotates to a position corresponding to the first limit waiting sensing element 41, the first warning device 61 is configured to operate, when the second inductive switch 32 rotates to a position corresponding to the second limit waiting sensing element 42, the second warning device 62 is configured to operate, and when the first inductive switch 31 rotates to a position corresponding to the first middle waiting sensing element 51 and the second inductive switch 32 rotates to a position corresponding to the second middle waiting sensing element 52, the first warning device 61 and the second warning device 62 are configured to operate simultaneously.

In this embodiment, when the first platform 1 rotates clockwise to the left limit position, the first warning device 61 can work to remind the worker, when the first platform 1 rotates to the right limit position, the second warning device 62 can work to remind the worker, and when the first platform 1 rotates to the centering position, the first warning device 61 and the second warning device 62 work simultaneously to remind the worker. Particularly, when the platform rotates to the centering position, the first warning device 61 and the second warning device 62 work simultaneously to remind the worker that the first platform 1 needs to be driven to rotate continuously, and the worker can only drive the first platform forcibly through the forcible switch 8.

The first warning device 61 and the second warning device 62 may be an audible alarm, an alarm lamp, or an audible and visual alarm, respectively.

Optionally, the first inductive switch 31 is a travel switch or a proximity switch, and the first inductive switch 31 is the travel switch or the proximity switch.

In this embodiment, the two inductive switches may be travel switches, and the inductive switches are turned on or off by touching, taking the first inductive switch 31 as an example, when the first inductive switch 31 contacts the first limit waiting sensing element 41, the first inductive switch 31 turns on the first warning device 61. The two sensing switches may also be proximity switches, and the sensing switches are turned on or off in a non-touch manner, for example, when the first sensing switch 31 rotates to a position right above the first limit waiting sensing element 41, the first sensing switch 31 turns on the first warning device 61.

The utility model discloses a slewer of another embodiment, include as before rotation mechanism, still include automobile body, working part and actuating mechanism, rotation mechanism's second platform 2 install in the automobile body, working part install in rotation mechanism's first platform 1, actuating mechanism with first platform 1 drive is connected, actuating mechanism is electric drive mechanism or hydraulic drive mechanism.

In this embodiment, the first platform 1 is fixed on the vehicle body, and the first platform 1 can rotate relative to the second platform 2 to drive the working component (e.g. the boom) to perform a rotation motion between the first limit object 41 and the second limit object 42.

Referring to fig. 3, alternatively, the oil path of the hydraulic driving mechanism has electromagnetic valves, the electromagnetic valves have a left-turn coil 71 and a right-turn coil 72, and the first inductive switch 31 is used for switching on the left-turn coil 71 or the first warning device 61, and the second inductive switch 32 is used for switching on the right-turn coil 72 or the second warning device 62.

In this embodiment, when the driving mechanism is a hydraulic driving mechanism including a hydraulic motor, as shown in (b) of fig. 3, when the first inductive switch 31 rotates to a position corresponding to the first limit waiting sensing element 41, the first inductive switch 31 disconnects the left-turn coil 71 of the electromagnetic valve, and switches to connect with the first warning device 61, and then the first warning device 61 is powered on to operate, because the first inductive switch 31 disconnects the left-turn coil 71 of the electromagnetic valve, the hydraulic motor connected to the electromagnetic valve cannot continue to rotate clockwise, and meanwhile, because the second inductive switch 32 does not sense the second limit waiting sensing element 42, it is described that the second inductive switch 32 is connected with the right-turn coil 72 of the electromagnetic valve and disconnects from the second warning device 62, and then the hydraulic motor connected to the electromagnetic valve can only rotate counterclockwise.

As shown in fig. 3 (c), when the second sensing switch 32 rotates to a position corresponding to the second limit waiting sensing element 42, the second sensing switch 32 is disconnected from the right-turn coil 72 of the solenoid valve, and is switched to be connected to the second warning device 62, and the second warning device 62 is powered on to operate, because the second sensing switch 32 is disconnected from the right-turn coil 72 of the solenoid valve, the hydraulic motor connected to the solenoid valve cannot rotate counterclockwise, and because the first sensing switch 31 does not sense the first limit waiting sensing element 41, it is indicated that the first sensing switch 31 is connected to the left-turn coil 71 of the solenoid valve, and is disconnected from the first warning device 61, and the hydraulic motor connected to the solenoid valve can only rotate clockwise.

Referring to fig. 3, optionally, the swiveling device further includes a forced switch 8, the forced switch 8 is connected to the solenoid valve, and the forced switch 8 is used for switching on the left-turn coil 71 or the right-turn coil 72.

In this embodiment, in the case of having the first middle position to-be-sensed piece 51 and the second middle position to-be-sensed piece 52, as shown in (a) of fig. 3, when the first sensing switch 31 senses the first middle position to-be-sensed piece 51 and the second sensing switch 32 senses the second middle position to-be-sensed piece 52, that is, when the first sensing switch is rotated to the middle position, since the first sensing switch 31 is disconnected from the left rotation coil 71, and is switched to be connected to the first warning device 61, and the second sensing switch is disconnected from the right rotation coil 72, and is switched to be connected to the second warning device 62, the first warning device 61 and the second warning device 62 operate simultaneously, and the left rotation coil 71 and the right rotation coil 72 are not energized, the solenoid valve is in the middle position, the hydraulic motor connected to the solenoid valve stops rotating, and it is ensured that the operating part in the middle position does not rotate accidentally, and when the rotation needs to be continued, the left rotation coil 71 or the right rotation coil 72 can be turned on by the forced switch 8.

As shown in fig. 3 (d), the first inductive switch 31 does not sense the first limit waiting sensing element 41 and the first middle position waiting sensing element 51, and the second inductive switch 32 does not sense the second limit waiting sensing element 42 and the second middle position waiting sensing element 52, at this time, the first inductive switch 31 is connected to the left turn coil 71, the second inductive switch 32 is connected to the right turn coil 72, and meanwhile, the first warning device 61 and the second warning device 62 do not work, which indicates that the hydraulic motor may rotate clockwise or counterclockwise at this time.

Alternatively, the driving mechanism may also be an electric driving mechanism including a motor, and the first inductive switch 31 and the second inductive switch 32 are electrically connected to the motor, respectively. When the first inductive switch 31 induces the first limit waiting sensing element 41, the motor cannot rotate clockwise; when the second inductive switch 32 induces the second limit waiting induction member 42, the motor cannot rotate anticlockwise continuously; when the first inductive switch 31 senses the first middle waiting induction element 51 and the second inductive switch 32 senses the second middle waiting induction element 52, the motor stops rotating, and if the motor needs to continue rotating, the motor needs to be controlled to continue rotating through an additional forcing structure.

The present invention provides a construction machine, which comprises a turning mechanism as described above or a turning device as described above. The engineering machinery can be a crane or an overhead working truck and the like.

Since the technical improvement and the beneficial effect of the engineering machine are the same as those of the slewing mechanism or the slewing device, the engineering machine is not repeated.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Without departing from the spirit and scope of the present disclosure, those skilled in the art can make various changes and modifications, which will fall into the scope of the present disclosure.

Claims (10)

1. A slewing mechanism is characterized by comprising a first platform (1), a second platform (2), an induction switch assembly and an assembly to be induced;

the first platform (1) is rotatably connected with the second platform (2), the induction switch assembly is arranged on the first platform (1), the assembly to be induced is arranged on the second platform (2), the induction switch assembly comprises a first induction switch (31) and a second induction switch (32), and the assembly to be induced comprises a first limit piece to be induced (41) and a second limit piece to be induced (42);

the first limit waiting induction piece (41) is located on a rotating track of the first induction switch (31), the second limit waiting induction piece (42) is located on a rotating track of the second induction switch (32), and when the first induction switch (31) rotates to a position corresponding to the first limit waiting induction piece (41), the second induction switch (32) and the second limit waiting induction piece (42) are arranged in a staggered mode.

2. The rotating mechanism as claimed in claim 1, wherein the component to be sensed further comprises a first middle component to be sensed (51) and a second middle component to be sensed (52), the first middle component to be sensed (51) and the second middle component to be sensed (52) are respectively disposed on the second platform (2), and the first middle component to be sensed (51) and the second middle component to be sensed (52) are both located on the same side of the direction from the first limit component to be sensed (41) to the second limit component to be sensed (42);

and the first middle position part to be sensed (51) and the second middle position part to be sensed (52) are respectively arranged on different concentric circles of the second platform (2), the first middle position part to be sensed (51) is positioned on the rotating track of the first sensing switch (31), and the second middle position part to be sensed (52) is positioned on the rotating track of the second sensing switch (32).

3. A slewing mechanism according to claim 2, characterized in that said first neutral to-be-induced element (51) and said second neutral to-be-induced element (52) are located on the same radius of said second platform (2).

4. A slewing mechanism according to claim 2, characterized in that the second platform (2) comprises a second platform body (21), a first engaging lug (22), a second engaging lug (23) and a middle engaging lug (24), the first engaging lug (22), the middle engaging lug (24) and the second engaging lug (23) are arranged at different positions in the circumferential direction of the second platform body (21), the first platform (1) comprises a first platform body (11) and a third engaging lug (12) which are connected with each other, the first limit sensing-object member (41) is arranged at the first engaging lug (22), the second limit sensing-object member (42) is arranged at the second engaging lug (23), the first middle sensing-object member (51) and the second middle sensing-object member (52) are arranged at the middle engaging lug (24), and the sensing switch assembly is arranged at the third engaging lug (12).

5. The swing mechanism as claimed in claim 2, further comprising a warning device, wherein the warning device comprises a first warning device (61) and a second warning device (62), the first warning device (61) is configured to operate when the first inductive switch (31) rotates to a position corresponding to the first limit waiting sensing member (41), the second warning device (62) is configured to operate when the second inductive switch (32) rotates to a position corresponding to the second limit waiting sensing member (42), and the first warning device (61) and the second warning device (62) are configured to operate simultaneously when the first inductive switch (31) rotates to a position corresponding to the first middle waiting sensing member (51) and the second inductive switch (32) rotates to a position corresponding to the second middle waiting sensing member (52).

6. A slewing mechanism according to claim 1, characterized in that said first inductive switch (31) is a travel switch or a proximity switch, and said first inductive switch (31) is said travel switch or said proximity switch.

7. Slewing device, characterized in that it comprises a slewing mechanism according to any one of claims 1-6, and further comprises a vehicle body, a working member and a driving mechanism, wherein the second platform (2) of the slewing mechanism is mounted on the vehicle body, the working member is mounted on the first platform (1) of the slewing mechanism, the driving mechanism is in driving connection with the first platform (1), and the driving mechanism is an electric driving mechanism or a hydraulic driving mechanism.

8. The swivel device according to claim 7, characterized in that the oil circuit of the hydraulic driving mechanism is provided with an electromagnetic valve, the electromagnetic valve is provided with a left-turn coil (71) and a right-turn coil (72), the first inductive switch (31) is used for switching on the left-turn coil (71) or the first warning device (61), and the second inductive switch (32) is used for switching on the right-turn coil (72) or the second warning device (62).

9. Swivel device according to claim 8, further comprising a force switch (8), the force switch (8) being adapted to switch on the left turn coil (71) or the right turn coil (72).

10. A working machine, characterized by comprising a slewing mechanism as claimed in any of claims 1-6 or a slewing device as claimed in any of claims 7-9.

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