Rotating shaft system driving locking mechanism

Abstract

The utility model discloses a rotating shaft system travelling crane locking mechanism, and relates to the technical field of rotating shaft locking. The utility model provides a rotating shaft system travelling crane locking mechanism which comprises a rotating shaft, a locking gear and a driving mechanism. The fixed base is provided with at least one locking assembly, and the locking assembly comprises a locking rack which can move in the radial direction of the locking gear so as to be close to or away from the locking gear; and the driving assembly is arranged on the fixed base and used for driving all the locking racks to move in the radial direction of the locking gear so as to selectively enable all the locking racks to be meshed with the locking gear, and circumferential rotation of the rotating shaft is limited through the locking racks.

Description

Technical Field

[0001] The present application relates to the technical field of rotating shaft locking, and in particular to a rotating shaft system crane locking structure. Background Art

[0002] For large ground turntables, due to space limitations of the transport vehicle and to ensure that the accuracy of the axis system does not change during transportation, it is often necessary to design a driving locking mechanism to fix the rotating axis to the fixed base during transportation.

[0003] The current driving locking mechanisms are divided into manual driving locking mechanisms and electric locking mechanisms. The two types of driving locking mechanisms are often installed on the outside near the fixed base. The two mechanisms are only different in the driving method. The locking of the base and the rotating shaft is achieved by extending the locking pin into the locking pin hole. In order to facilitate the insertion of the locking pin into the locking pin control, the diameter of the locking pin is often smaller than the diameter of the locking pin hole, and there will be a very small gap. Due to the increase in the functional requirements of the turntable, the size of the turntable is getting larger and larger, and the mass of the rotating part of the turntable is also increasing. During transportation, due to the gap between the locking pin and the locking pin hole, when encountering an emergency, the rotating part rotates, and the locking pin collides with the locking pin hole, which may bend the locking pin, making the driving locking mechanism invalid and unable to be unlocked after the equipment arrives at the installation site. Summary of the invention

[0004] The main purpose of the present application is to provide a rotating shaft system driving locking mechanism, which aims to solve the technical problem in the prior art that the rotating shaft system cooperates with the locking pin shaft and the locking pin hole, and the locking pin shaft may be accidentally deformed and cannot be unlocked normally.

[0005] To achieve the above-mentioned purpose, the present application provides a rotating shaft system driving locking mechanism, comprising: a rotating shaft, whose outer wall is provided with a locking gear; a fixed base, on which is provided at least one locking assembly, the locking assembly comprising a locking rack that can move along the radial direction of the locking gear to approach or move away from the locking gear; a driving assembly, which is arranged on the fixed base, and the driving assembly is used to drive all of the locking racks to move along the radial direction of the locking gear so as to selectively make all of the locking racks engage with the locking gear, thereby limiting the circumferential rotation of the rotating shaft through the locking racks.

[0006] Optionally, the locking assembly further includes a sliding rail and a return spring; the first end of the sliding rail is connected to the fixed base, the second end of the sliding rail is provided with a baffle, the baffle is located between the sliding rail and the locking gear, the lower end of the locking rack is provided with a connecting portion, the connecting portion is sleeved on the sliding rail, and the return spring is located between the connecting portion and the baffle. By providing the sliding rail, the return spring and the baffle, the locking rack always has a tendency to move away from the locking gear, so as to cooperate with the driving assembly. When the locking rack loses the external force of the driving assembly, it can automatically disengage from the locking gear under the action of the return spring and automatically complete the unlocking.

[0007] Optionally, the extension direction of the sliding guide rail is parallel to the radial direction of the locking gear. By limiting the extension direction of the sliding guide rail, the moving path of the locking rack is limited and guided to ensure that the locking rack can mesh with the locking gear during the reciprocating motion.

[0008] Optionally, a support plate is provided at the lower end of the baffle, and the support plate is connected to the fixed base. The support plate is provided to support the baffle, thereby improving the integrity of the baffle and the fixed base, and improving the structural stability of the baffle and the sliding guide rail.

[0009] Optionally, the number of the locking components is multiple, and the spacing between adjacent locking components is equal. By providing multiple locking components, the contact area with the locking gear is increased, the locking stability is improved, all the locking components are evenly distributed, the force is balanced, and the risk of local damage is reduced.

[0010] Optionally, the driving assembly includes a driving gear; the driving gear is rotatably disposed on the fixed base, the middle portion of the driving gear has a through hole, and the locking rack is located in the through hole; when the locking rack abuts against the inner wall of the through hole, the locking rack meshes with the locking gear; the inner wall of the through hole is provided with a clearance groove corresponding to the locking rack, and when the locking rack is located in the clearance groove, the locking rack disengages from the locking gear; by rotating the driving gear, the position of the clearance groove relative to the locking rack is adjusted so that the locking rack can selectively mesh with the locking gear. By providing a clearance groove corresponding to the locking rack on the inner wall of the driving wheel, all the locking racks can be synchronously driven by simply rotating the driving gear, so that all the racks can be quickly meshed with the locking gear.

[0011] Optionally, the clearance groove is an arc groove, and the end of the locking rack away from the locking gear is an arc surface. By setting the clearance groove as an arc groove, it is convenient for the locking rack to move relative to the surface of the clearance groove, so that the locking rack can smoothly transition between the clearance groove and the inner wall of the through hole of the locking rack.

[0012] Optionally, the fixed base is provided with an annular protrusion, the driving gear is partially sleeved on the protrusion, and a bearing is provided between the driving gear and the protrusion. The protrusion is provided to support the locking assembly and the driving gear, and the bearing is provided to enable the driving gear to rotate smoothly.

[0013] Optionally, the driving assembly further comprises a driving rack, which is disposed on the fixed base and meshes with the driving gear, and the driving rack can reciprocate. The driving gear can be rotated by meshing the driving rack with the driving gear and then controlling the driving gear to move.

[0014] Optionally, the drive assembly further includes a bidirectional holding electromagnet, a bushing base and a self-lubricating bushing; the drive rack is connected to a connecting rod, the connecting rod is connected to the bidirectional holding electromagnet, the self-lubricating bushing is arranged on the connecting rod, the bushing base is arranged on the fixed base, and the self-lubricating bushing is arranged in the bushing base. By arranging the bidirectional holding electromagnet, the bushing base and the self-lubricating bushing, it is convenient to realize the reciprocating motion of the digitally controlled drive rack.

[0015] Beneficial effects that this application can achieve:

[0016] A rotating shaft system driving locking mechanism proposed in an embodiment of the present application, by sleeve-mounted locking gear on the outer wall of the rotating shaft, the driving component can drive the locking rack to move radially along the locking gear, so that the locking rack is meshed with the locking gear, and the circumferential locking of the rotating shaft is completed; relying on the meshing between the locking gear and the locking rack, the area of ​​the force point is increased and the reliability of the locking structure is enhanced; the meshing with the locking gear is achieved by radial movement of the locking rack, which also avoids the generation of gaps at the connecting structure and the occurrence of locking instability compared to the method of matching the gap between the shaft and the hole in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a first three-dimensional structural schematic diagram of the locking mechanism of the present application;

[0018] Figure 2 for Figure 1 A schematic diagram of a top view structure;

[0019] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of;

[0020] Figure 4 for Figure 2 Another state structural diagram of ;

[0021] Figure 5 This is a schematic diagram of the exploded structure of the locking structure of this application.

[0022] In the figure:

[0023] 10-rotating shaft, 11-locking gear, 20-fixed base, 21-protrusion, 22-bearing, 30-locking assembly, 31-reset spring, 32-sliding guide, 33-locking rack, 331-connecting part, 34-baffle, 35-support plate, 40-driving gear, 41-through hole, 42-gap groove, 50-driving rack, 51-connecting rod, 52-bushing base, 53-self-lubricating bushing, 54-bidirectional holding electromagnet.

[0024] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0029] Example 1

[0030] refer to Figure 1-Figure 3 The present application provides a rotating shaft system driving locking mechanism, including: a rotating shaft 10, a fixed base 20 and a driving assembly.

[0031] The upper end of the rotating shaft 10 is used to be connected to the turntable, and the turntable can be rotated by driving the rotating shaft 10 to rotate. As the name suggests, the turntable is a rotatable platform. For large ground turntables, it can be used to orient transport vehicles, for example, by rotating the turntable to adjust the direction of the vehicle. When the turntable rotates to a certain position, the turntable needs to be kept fixed in this position. At this time, the rotating shaft 10 needs to be locked by a locking structure to limit the rotation of the rotating shaft 10 in the circumferential direction.

[0032] The position of the fixed base 20 will not change during use. When the rotating shaft 10 is locked, the fixed base 20 provides support force for the driving assembly.

[0033] In this embodiment, a rotating shaft system driving locking mechanism comprises: a rotating shaft 10, a fixed base 20 and a driving assembly. The outer wall of the rotating shaft 10 is provided with a locking gear 11; at least one locking assembly 30 is provided on the fixed base 20, and the locking assembly 30 comprises a locking rack 33 that can move along the radial direction of the locking gear 11 to approach or move away from the locking gear 11; the driving assembly is provided on the fixed base 20, and the driving assembly is used to drive all the locking racks 33 to move along the radial direction of the locking gear 11, so as to selectively make all the locking racks 33 mesh with the locking gear 11, and limit the circumferential rotation of the rotating shaft 10 through the locking racks 33.

[0034] The embodiment of the present application provides a rotating shaft system driving locking mechanism, by sleeve-arranging a locking gear 11 on the outer wall of the rotating shaft 10, the driving component can drive the locking rack 33 to move radially along the locking gear 11, so that the locking rack 33 is meshed with the locking gear 11, and the circumferential locking of the rotating shaft 10 is completed; relying on the meshing between the locking gear 11 and the locking rack 33, the area of ​​the force point is increased and the reliability of the locking structure is enhanced; the radial movement of the locking rack 33 is used to achieve the meshing with the locking gear 11, and compared with the prior art method of matching the gap between the shaft and the hole, it also avoids the generation of gaps at the connecting structure and the occurrence of locking instability.

[0035] Specifically, the rotating shaft 10 and the fixed base 20 are two relatively independent components. The fixed base 20 will not provide support for the rotating shaft 10. The supporting components of the rotating shaft 10 are not shown in this application. During use, the axis position of the rotating shaft 10 will not change, and the rotating shaft 10 will only rotate around its axis. Only one locking assembly 30 (not shown in the figure) can be set on the fixed base 20; two locking assemblies 30 (the figures show two locking assemblies 30), in which case the two locking assemblies 30 are symmetrically arranged; four locking assemblies 30 (not shown in the figure) can also be set, and the central angle corresponding to the four locking assemblies 30 is ninety degrees. When working, the driving assembly can simultaneously drive all the locking racks 33 to move to complete the meshing of all the locking racks 33 with the locking gear 11, and there is no need to lock each locking rack 33 separately, thereby improving the locking efficiency.

[0036] Different from the traditional driving locking mechanism installed on the outside close to the base, the driving locking mechanism provided in this embodiment is installed at the end of the rotating shaft 10. Due to the reduction of the rotation radius, when an emergency occurs during transportation, the collision force generated by the rotation of the rotating shaft 10 is also reduced. In the driving locking process, it mainly relies on the meshing between the gear and the rack, which increases the force point area and enhances the reliability of the entire driving locking device.

[0037] Example 2

[0038] As an optional implementation, refer to Figure 3 A rotating shaft system driving locking mechanism of the present application provides a specific structure of a locking assembly 30.

[0039] In this embodiment, the locking assembly 30 further includes a sliding rail 32 and a return spring 31; the first end of the sliding rail 32 is connected to the fixed base 20, the second end of the sliding rail 32 is provided with a baffle 34, the baffle 34 is located between the sliding rail 32 and the locking gear 11, the lower end of the locking rack 33 is provided with a connecting portion 331, the connecting portion 331 is sleeved on the sliding rail 32, and the return spring 31 is located between the connecting portion 331 and the baffle 34. By providing the sliding rail 32, the return spring 31 and the baffle 34, the locking rack 33 always has a tendency to move away from the locking gear 11, so as to cooperate with the driving assembly, and when the locking rack 33 loses the external force of the driving assembly, it can automatically disengage from the locking gear 11 under the action of the return spring 31, and automatically complete the unlocking.

[0040] Specifically, there are two sliding guide rails 32, the axes of the two sliding guide rails 32 are parallel to each other, and a through hole for the sliding guide rail 32 to pass through is provided at the connecting portion 331 of the locking rack 33. The two sliding guide rails 32 are provided to play a role of limiting and guiding the locking rack 33. The two ends of the reset spring 31 can be connected to the baffle 34 and the connecting portion 331 respectively, and the reset spring 31 can also be sleeved on the sliding guide rail 32. The reset spring 31 is always in a compressed state, so that the reset spring 31 can always provide thrust to the locking rack 33, so that the locking rack 33 always has a tendency to move away from the locking gear 11. After the driving component cancels the external force applied to the locking component 30, the locking rack 33 can automatically move in a direction away from the locking gear 11 under the action of the reset spring 31, and automatically complete the unlocking.

[0041] Example 3

[0042] As an optional implementation, refer to Figure 3 A rotating shaft system crane locking mechanism of the present application provides a specific structure of a sliding guide rail 32.

[0043] In this embodiment, the extension direction of the sliding guide rail 32 is parallel to the radial direction of the locking gear 11. By limiting the extension direction of the sliding guide rail 32, the moving path of the locking rack 33 is limited and guided, ensuring that the locking rack 33 can mesh with the locking gear 11 during the reciprocating motion.

[0044] Specifically, when there is one sliding guide rail 32, the extended axis of the sliding guide rail 32 passes through the axis of the locking gear 11, and the axis of the sliding guide rail 32 is perpendicular to the axis of the gear. When there are two sliding guide rails 32, in order to improve the stability when the locking rack 33 is locked with the locking gear 11, the two sliding guide rails 32 are respectively located on both sides of the axis of the gear in parallel with each other.

[0045] Example 4

[0046] As an optional implementation, refer to Figure 3 and Figure 5 A rotating shaft system driving locking mechanism of the present application provides a specific structure of a baffle 34.

[0047] In this embodiment, a support plate 35 is connected to the lower end of the baffle 34, and the support plate 35 is connected to the fixed base 20. By providing the support plate 35, the baffle 34 is supported, the integrity of the baffle 34 and the fixed base 20 is improved, and the structural stability of the baffle 34 and the sliding guide rail 32 is improved.

[0048] Specifically, one end of the support plate 35 is connected to the fixed base 20, the other end of the support plate 35 is a free end, and the baffle 34 is connected to the free end of the support plate 35. The baffle 34 and the support plate 35 can be bonded or bolted or integrally formed.

[0049] Example 5

[0050] As an optional implementation, refer to Figure 1 , Figure 2 and Figure 3 A rotating shaft system driving locking mechanism of the present application provides a specific structure of a locking assembly 30.

[0051] In this embodiment, there are multiple locking assemblies 30, and the spacing between adjacent locking assemblies 30 is equal. By providing multiple locking assemblies 30, the contact area with the locking gear 11 is increased, the locking stability is improved, and all the locking assemblies 30 are evenly distributed, so that the force is balanced and the risk of local damage is reduced.

[0052] Specifically, the figures all show a case where two locking assemblies 30 are provided, and the two locking assemblies 30 are symmetrically arranged on both sides of the locking gear 11. When the locking racks 33 on the two locking assemblies 30 are engaged with the locking gear 11 to achieve locking, when the locking gear 11 is subjected to external force, it can be evenly transmitted to the two locking racks 33.

[0053] Example 6

[0054] As an optional implementation, refer to Figure 1 , Figure 2 and Figure 4 A rotating shaft system driving locking mechanism of the present application provides a specific structure of a driving component.

[0055] In this embodiment, the driving assembly includes a driving gear 40; the driving gear 40 is rotatably disposed on the fixed base 20, and a through hole 41 is provided in the middle of the driving gear 40, and the locking rack 33 is located in the through hole 41; when the locking rack 33 abuts against the inner wall of the through hole 41, the locking rack 33 meshes with the locking gear 11; the inner wall of the through hole 41 is provided with a clearance groove 42 corresponding to the locking rack 33, and when the locking rack 33 is located in the clearance groove 42, the locking rack 33 is disengaged from the locking gear 11; by rotating the driving gear 40, the position of the clearance groove 42 relative to the locking rack 33 is adjusted, so that the locking rack 33 can selectively mesh with the locking gear 11. By providing the clearance groove 42 corresponding to the locking rack 33 on the inner wall of the driving wheel, all the locking racks 33 can be synchronously driven by rotating the driving gear 40, so that all the racks can be quickly meshed with the locking gear 11.

[0056] Specifically, Figure 2 As shown, the outer wall of the locking rack 33 is located in the clearance groove 42, and the locking rack 33 is separated from the locking gear 11. At this time, the locking gear 11 is in an unlocked state, and the rotating shaft 10 can rotate freely. When the driving gear 40 is controlled to rotate, the outer wall of the locking rack 33 moves along the inner wall of the clearance groove 42, and the outer wall of the locking rack 33 moves from the clearance groove 42 to the inner wall of the through hole 41 of the driving gear 40 (the inner wall of the through hole 41 here refers to the area outside the clearance groove 42). The clearance groove 42 is misaligned with the locking rack 33, as shown in FIG. Figure 4 As shown, at this time, the outer wall of the locking rack 33 abuts against the inner wall of the through hole 41, and the locking rack 33 meshes with the locking gear 11, completing the locking of the rotating shaft 10 and limiting the circumferential rotation of the rotating shaft 10.

[0057] Example 7

[0058] As an optional implementation, refer to Figure 1 , Figure 2 and Figure 4 A rotating shaft system driving locking mechanism of the present application provides a specific structure of a clearance groove 42.

[0059] In this embodiment, the clearance groove 42 is an arcuate groove, and the end of the locking rack 33 away from the locking gear 11 is an arcuate surface. By setting the clearance groove 42 as an arcuate groove, it is convenient for the locking rack 33 to move relative to the surface of the clearance groove 42, so that the locking rack 33 can smoothly transition between the clearance groove 42 and the inner wall of the through hole 41 of the locking rack 33.

[0060] Specifically, the notch position of the clearance groove 42 can be smoothly transitioned, and the end of the locking rack 33 that contacts the inner wall of the through hole 41 is also an arc surface, so that the locking rack 33 can be smoother and more stable when entering and exiting the clearance groove 42.

[0061] Example 8

[0062] As an optional implementation, refer to Figure 5 A rotating shaft system crane locking mechanism of the present application provides a specific structure of a fixed base 20.

[0063] In this embodiment, a ring-shaped protrusion 21 is provided on the fixed base 20, and a portion of the driving gear 40 is sleeved on the protrusion 21, and a bearing 22 is provided between the driving gear 40 and the protrusion 21. The protrusion 21 is provided to support the locking assembly 30 and the driving gear 40, and the bearing 22 is provided to enable the driving gear 40 to rotate smoothly.

[0064] Specifically, a portion of the driving gear 40 along its axial direction is sleeved on the protrusion 21 , and a portion of the upper end of the driving gear 40 protrudes to the upper end of the protrusion 21 , so that the clearance groove 42 on the driving gear 40 can contact and cooperate with the locking rack 33 .

[0065] Example 9

[0066] As an optional implementation, refer to Figure 1-Figure 5 A rotating shaft system crane locking mechanism of the present application provides a specific structure of a fixed base 20.

[0067] In this embodiment, the driving assembly further includes a driving rack 50; the driving rack 50 is disposed on the fixed base 20 and meshes with the driving gear 40, and the driving rack 50 can reciprocate. By meshing the driving rack 50 with the driving gear 40 and then controlling the driving gear 40 to move, the driving gear 40 can be rotated.

[0068] Specifically, the drive rack 50 can be controlled to reciprocate to achieve the reciprocating motion of the drive gear 40, so that the locking rack 33 can repeatedly cooperate with the locking gear 11 to switch between the locked and unlocked states. The drive rack 50 can be manually controlled to move forward and backward, or it can be electrically controlled.

[0069] Example 10

[0070] As an optional implementation, refer to Figure 1-Figure 5 A rotating shaft system driving locking mechanism of the present application provides a specific structure for the electric control of the driving rack 50.

[0071] In this embodiment, the driving assembly further includes a bidirectional holding electromagnet 54, a bushing base 52 and a self-lubricating bushing 53; the driving rack 50 is connected to a connecting rod 51, the connecting rod 51 is connected to the bidirectional holding electromagnet 54, the self-lubricating bushing 53 is arranged on the connecting rod 51, the bushing base 52 is arranged on the fixed base 20, and the self-lubricating bushing 53 is arranged in the bushing base 52. By arranging the bidirectional holding electromagnet 54, the bushing base 52 and the self-lubricating bushing 53, it is convenient to realize the reciprocating motion of the driving rack 50 by digital control.

[0072] Specifically, a two-phase holding electromagnet is a special electromagnet design that can switch and maintain between two stable states without requiring a continuous current to maintain its position. The working principle of a two-phase holding electromagnet generally involves two coils and a movable armature or magnetic core. When one of the coils is energized, the magnetic field generated attracts the armature to a position, usually referred to as the "working" position. When the current is cut off, the armature does not return immediately, but remains in that position, due to the residual magnetism effect of the magnetic core or a special mechanical structure. To switch to another position, the other coil needs to be energized. The magnetic field generated by this new current overcomes the residual magnetism generated by the first coil and attracts the armature to the second position. Similarly, when the current is cut off, the armature remains in the second position. The self-lubricating bushing 53 is a sliding bearing that does not require lubrication or can reduce the number of lubrications, also known as an oil-free bearing. It is made of solid self-lubricating material, and the heat energy generated by the friction surface melts the self-lubricating material and forms a uniform lubricating film, thereby realizing automatic lubrication of the friction surface. The bushing base 52 can also play a guiding and limiting role in the moving path of the drive rack 50. The connecting rod 51 driving the rack 50 may be connected to the output shaft of the two-phase holding electromagnet via a screw pin.

[0073] When driving locking is required, a positive excitation is given to the two-way holding electromagnet 54. At this time, the output shaft of the two-way holding electromagnet 54 retracts, driving the driving rack 50 to move. Since the driving rack 50 and the driving gear 40 are in a meshing state, the movement of the driving rack 50 drives the driving gear 40 to rotate, so that the give way groove 42 located on the inner side of the driving gear 40 is misaligned with the outer convex structure of the locking rack 33, and the locking rack 33 is lifted and moves along the sliding guide rail 32 toward the center of the rotating shaft 10. When the two-way holding electromagnet 54 is extended to the limit position, the locking rack 33 is just in a meshing state with the locking gear 11, realizing the locking of the rotating shaft 10 and the turntable fixed base 20.

[0074] When the rotating shaft 10 needs to be unlocked, a reverse excitation is given to the two-way holding electromagnet 54. At this time, the output shaft of the two-way holding electromagnet 54 extends out, driving the driving rack 50 to move. At this time, the driving rack 50 drives the driving gear 40 to rotate in the opposite direction, and the position of the give way groove 42 on the inner side of the driving gear 40 is reset. Under the action of the reset spring 31, the locking rack 33 moves in the opposite direction toward the locking gear 11 along the sliding guide rail 32. When the two-way holding electromagnet 54 retracts to the extreme position, the convex structure of the locking rack 33 fits perfectly with the concave structure on the inner side of the rotating gear. The locking rack 33 is separated from the locking size due to the action of the reset spring 31, thereby realizing the unlocking between the rotating shaft 10 and the fixed base 20.

[0075] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A rotating shaft system crane locking mechanism, characterized in that: include: A rotating shaft, the outer wall of which is sleeved with a locking gear; a fixed base on which at least one locking assembly is disposed, wherein the locking assembly comprises a locking rack capable of moving in a radial direction of the locking gear to approach or move away from the locking gear; A driving assembly is arranged on the fixed base, and is used for driving all the locking racks to move radially along the locking gear, so as to selectively make all the locking racks mesh with the locking gear, thereby limiting the circumferential rotation of the rotating shaft through the locking racks.

2. The rotating shaft system driving locking mechanism according to claim 1, characterized in that: The locking assembly also includes a sliding guide rail and a return spring; The first end of the sliding guide rail is connected to the fixed base, the second end of the sliding guide rail is provided with a baffle, the baffle is located between the sliding guide rail and the locking gear, the lower end of the locking rack is provided with a connecting portion, the connecting portion is sleeved on the sliding guide rail, and the reset spring is located between the connecting portion and the baffle.

3. The rotating shaft system driving locking mechanism according to claim 2, characterized in that: The extending direction of the sliding guide rail is parallel to the radial direction of the locking gear.

4. The rotating shaft system driving locking mechanism according to claim 2, characterized in that: A support plate is connected to the lower end of the baffle, and the support plate is connected to the fixed base.

5. The rotating shaft system driving locking mechanism according to claim 1, characterized in that: There are multiple locking components, and the spacing between adjacent locking components is equal.

6. The rotating shaft system driving locking mechanism according to claim 1, characterized in that: The drive assembly includes a drive gear; The driving gear is rotatably disposed on the fixed base, a through hole is provided in the middle of the driving gear, and the locking rack is located in the through hole; When the locking rack abuts against the inner wall of the through hole, the locking rack meshes with the locking gear; The inner wall of the through hole is provided with a clearance groove corresponding to the locking rack one by one, and when the locking rack is located in the clearance groove, the locking rack is separated from the locking gear; By rotating the driving gear, the position of the clearance groove relative to the locking rack is adjusted so that the locking rack can selectively mesh with the locking gear.

7. The rotating shaft system driving locking mechanism according to claim 6, characterized in that: The clearance groove is an arc-shaped groove, and the end of the locking rack away from the locking gear is an arc-shaped surface.

8. The rotating shaft system driving locking mechanism according to claim 6, characterized in that: The fixed base is provided with an annular protrusion, a portion of the driving gear is sleeved on the protrusion, and a bearing is provided between the driving gear and the protrusion.

9. The rotating shaft system driving locking mechanism according to claim 6, characterized in that: The drive assembly also includes a drive rack; The driving rack is arranged on the fixed base and meshes with the driving gear, and the driving rack can reciprocate.

10. The rotating shaft system driving locking mechanism according to claim 9, characterized in that: The drive assembly also includes a bidirectional holding electromagnet, a bushing base and a self-lubricating bushing; The driving rack is connected with a connecting rod, the connecting rod is connected with the bidirectional retaining electromagnet, the self-lubricating bushing is arranged on the connecting rod, the bushing base is arranged on the fixed base, and the self-lubricating bushing is arranged in the bushing base.

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