Automatic locking and unlocking mechanism for rotating shaft

Abstract

The utility model discloses an automatic locking and unlocking mechanism for a rotating shaft, which comprises a locking sleeve, a rotating drum is sleeved with the locking sleeve, the locking sleeve is connected with the rotating drum through a pin, a spring is arranged at the upper end of the locking sleeve, the locking sleeve is provided with a clamping groove, and the clamping groove corresponds to a bulge on a limiting baffle seat; and the rotary drum penetrates through the thrust pressing block. When the pin shaft needs to be rotated, unlocking is achieved through pushing of the wrench, and when the pin shaft does not need to be rotated, the locking sleeve on the pin shaft can be automatically clamped into the baffle to limit rotation of the pin shaft; operation is simple, operation omission of operators is avoided, and safety is improved.

Description

Technical Field

[0001] The utility model relates to the field of rotating shafts, in particular to an automatic locking and unlocking mechanism for a rotating shaft. Background Art

[0002] In order to meet the different requirements of customers, wheeled cranes need to be equipped with jibs in some specific working conditions. The loading and unloading process of the jib requires the disassembly and assembly of multiple pins. At the same time, after the pins are installed, clips need to be installed to limit the pins to prevent them from accidentally falling off. The convenience and efficiency of disassembly and assembly of the pins and clips are the focus of users.

[0003] When the jib needs to be used under specific working conditions, the prior art pulls out the pins of the rear bracket and the middle bracket, uses the pin of the front bracket as the rotation axis, pushes and turns the jib until it is aligned with the arm head hole (left hole) of the main arm, and inserts the pin of the arm head hole. Then pull out the pin of the front bracket, use the inserted arm head hole pin as the rotation axis, continue to push and turn the jib, and turn the jib to the left side of the main arm. After using the jib, rotate the jib around the arm head hole pin, and when the jib joint hole is aligned with the front bracket hole, insert the front bracket pin to complete the connection between the jib and the front bracket. The front bracket mainly includes a structural body, a threaded shaft, a rotating cylinder, a thrust block, bolts, clips and other structures.

[0004] However, the clips need to be manually removed and installed each time they are used, which is time-consuming. The clips are installed at a high position and require a ladder to operate, which is also less safe. The clips are easily deformed and damaged by external forces, and have poor reliability. In actual use, there is also the problem of missing clips, which causes the pin shaft to fall off, posing a safety hazard. Utility Model Content

[0005] Purpose of the utility model: In view of the shortcomings and defects of the prior art, the utility model provides an automatic locking and unlocking mechanism for a rotating shaft. When the pin shaft needs to be rotated, it is unlocked by pushing it with a wrench. When the pin shaft does not need to be rotated, the locking sleeve on the pin shaft will automatically fit into the baffle to limit the rotation of the pin shaft. The operation is simple and can avoid operator omissions, thereby improving safety.

[0006] Technical solution: The utility model is an automatic locking and unlocking mechanism for a rotating shaft, which is characterized by comprising a locking sleeve, which is arranged on a rotating drum, the locking sleeve and the rotating drum are connected by a pin, a spring is arranged at the upper end of the locking sleeve, and the locking sleeve is provided with a slot, which corresponds to the protrusion on the limit baffle seat; the rotating drum passes through a thrust block.

[0007] Wherein, the spring and the locking sleeve pass through the limit baffle seat.

[0008] Wherein, the limit baffle seat and the locking sleeve are connected through corresponding protrusions and slots.

[0009] Wherein, the position of the limit baffle seat is fixed by a plurality of screws.

[0010] There are four screws, which are located at four corners of the limit baffle seat.

[0011] Beneficial effects: Compared with the prior art, the utility model has the following significant advantages: when the pin shaft needs to be rotated, the lock can be unlocked by pushing the wrench, and when the pin shaft does not need to be rotated, the locking sleeve on the pin shaft will automatically snap into the baffle to limit the rotation of the pin shaft; the operation is simple, and the operator can avoid operation omissions, thereby improving safety. The utility model solves the problem that the clip needs to be manually disassembled and assembled every time the auxiliary arm is used. The locking mechanism is automatically unlocked when the rotating drum is rotated. At the same time, the locking mechanism of the utility model can realize automatic locking, avoiding the safety hazard of manual operation and missing the clip. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The structure of the utility model is shown in FIG. Figure 1 ;

[0013] Figure 2 The structure of the utility model is shown in FIG. Figure 2 ;

[0014] Figure 3 The structure of the utility model in the locked state is shown in FIG. Figure 1 ;

[0015] Figure 4 The structure of the utility model in the locked state is shown in FIG. Figure 2 ;

[0016] Figure 5 The structure of the utility model in the locked state is shown in FIG. Figure 3 ;

[0017] Figure 6 This is a schematic diagram of the structure of the unlocked state of the utility model. Figure 1 ;

[0018] Figure 7 This is a schematic diagram of the structure of the unlocked state of the utility model. Figure 2 ;

[0019] Figure 8 This is a schematic diagram of the structure of the unlocked state of the utility model. Figure 3 ;

[0020] In the figure, 1 is a rotating drum; 2 is a spring; 3 is a limit baffle seat; 4 is a locking sleeve; 5 is a push-stop block; 6 is a pin; and 7 is a screw. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0022] The automatic locking and unlocking mechanism of the rotating shaft of the utility model comprises a locking sleeve 4, which is sleeved on a rotating drum 1, and the locking sleeve 4 and the rotating drum 1 are connected by a pin 6. A spring 2 is provided at the upper end of the locking sleeve 4, and the locking sleeve 4 is provided with a slot corresponding to a protrusion on a limit baffle seat 3; the rotating drum 1 passes through a thrust block 5. Among them, the spring 2 and the locking sleeve 4 pass through the limit baffle seat 3. The limit baffle seat 3 and the locking sleeve 4 are connected through corresponding protrusions and slots. The limit baffle seat 3 is fixed in position by a plurality of screws 7. The number of screws 7 is 4, and the 4 screws 7 are located at the 4 corners of the limit baffle seat 3.

[0023] When in use, on the basis of the original main structure, the clip is replaced with a mechanism that can automatically unlock and lock, which is composed of a spring 2, a locking sleeve 4, a pin 6, a limit baffle seat 3, etc. When threading the shaft, the locking sleeve 4 is compressed by external force to automatically unlock the designed stroke. After the threading is completed, the external force is removed and the spring 2 rebounds to automatically lock the shaft. The operation is convenient and the reliability is high.

[0024] The locking sleeve 4 is sleeved on the rotating drum 1. The locking sleeve 4 and the rotating drum 1 are connected by a pin 6. The two can only slide up and down but cannot rotate relative to each other. There is a spring 2 at the upper end of the locking sleeve 4. The thrust of the spring 2 keeps the locking sleeve 4 at the lower position. There is a groove on the outer side of the bottom of the locking sleeve 4, and there is a corresponding protrusion on the limit baffle seat 3. When the locking sleeve 4 is at the bottom, the protrusion on the inner side of the baffle can be stuck in the groove of the locking sleeve 4, limiting the rotation of the locking sleeve, and then limiting the rotation of the rotating drum 1.

[0025] When the drum 1 needs to be rotated, the head of the socket wrench is placed on the bottom of the drum 1. Since the sleeve and the locking sleeve 4 overlap in radial direction, the sleeve will push the locking sleeve upward, and the locking sleeve 4 slot part and the baffle no longer overlap, so the locking sleeve 4 and the drum 1 can rotate freely. After the drum 1 rotates, the sleeve is removed, and the locking sleeve 4 is pushed down by the spring 2; if the locking sleeve slot overlaps with the baffle protrusion, the locking sleeve 4 can move down to the bottom, and the inner protrusion of the baffle is stuck in the slot, so the locking sleeve 4 cannot rotate.

[0026] If the locking sleeve groove and the baffle protrusion do not overlap, the locking sleeve 4 cannot move down to the bottom, but is pressed against the plane of the baffle by the spring 2. At this time, the locking sleeve 4 and the drum 1 can still rotate. When the drum 1 rotates accidentally due to vibration or the like, when the groove and the protrusion overlap, due to the pressure of the spring 2, the locking sleeve 4 will continue to move down to the bottom, and the protrusion inside the baffle will be stuck in the groove. The locking sleeve 4 cannot rotate, and the drum 1 is automatically locked. In this state, the drum 1 does not rotate more than half a circle, and the pin shaft has a certain margin. Even if the drum 1 rotates half a circle accidentally, it can ensure that the pin shaft will not fall out, ensuring the reliability of the locking.

[0027] When the rotary shaft automatic locking and unlocking mechanism of the utility model is used, when the sleeve rotates the rotary drum 1, the locking sleeve 4 is pushed to unlock, and no separate unlocking operation is required, the operation steps are few, and the efficiency is high. An extended sleeve or a specially made extended handle can be used to rotate the rotary drum, and the operator can complete the operation while standing on the ground, without the need for high-altitude operations. After the rotary drum 1 rotates, it can be automatically locked to avoid missing the clip, and the safety is high. The structural strength of the limit baffle seat 3 and the locking sleeve 4 is higher than that of the clip, which is safe and reliable.

Claims

1. A rotating shaft automatic locking and unlocking mechanism, characterized in that: The invention comprises a locking sleeve (4), the locking sleeve (4) is sleeved on a rotating drum (1), the locking sleeve (4) and the rotating drum (1) are connected via a pin (6), a spring (2) is provided at the upper end of the locking sleeve (4), the locking sleeve (4) is provided with a slot, and the slot corresponds to a protrusion on a limit baffle seat (3); the rotating drum (1) passes through a thrust block (5).

2. The automatic locking and unlocking mechanism of the rotating shaft according to claim 1, characterized in that: The spring (2) and the locking sleeve (4) pass through the limit baffle seat (3).

3. The automatic locking and unlocking mechanism of the rotating shaft according to claim 1, characterized in that: The position limiting baffle seat (3) and the locking sleeve (4) are connected to the slot via corresponding protrusions.

4. The automatic locking and unlocking mechanism of the rotating shaft according to claim 1, characterized in that: The position of the limit baffle seat (3) is fixed by a plurality of screws (7).

5. The automatic locking and unlocking mechanism of the rotating shaft according to claim 4, characterized in that: The number of the screws (7) is 4, and the 4 screws (7) are located at the 4 corners of the limit baffle seat (3).

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