Circumferential indexing type rotary locking mechanism

Abstract

The present invention relates to a circumferential indexing type rotary locking mechanism, which comprises a fixed disk, a guide post, a locking nut and a dial. The upper end of the guide post is installed on the fixed disk through a thrust bearing. The lower end of the guide post is provided with a dial. The locking nut is threadedly connected to the guide post. When the locking nut is tightened, under the action of a disc spring, the stop pin is pushed upward until it is stuck into the indexing notch at the bottom of the fixed disk, realizing the indexing positioning and locking of the guide post and the fixed disk. When the locking nut is loosened, the slide post drives the stop pin to slide down with the loosening of the locking nut under the action of its own gravity until the stop pin completely disengages from the indexing notch at the bottom of the fixed disk, completing the unlocking of the guide post and the fixed disk. Rotating the dial will drive the guide post to drive the heavy object to rotate together. The operation of the present invention can be completed without the aid of external tools, and it is applicable to the transitional connection between two mechanical modules that occasionally require intermittent indexing rotation, and can easily and reliably realize the relative circumferential indexing rotation, locking and positioning in the horizontal direction between the two modules.

Description

Technical Field

[0001] The present invention relates to the field of construction machinery, and particularly to a circumferential indexing rotary locking mechanism that can be used on an industrial production platform or an engineering vehicle. Background Art

[0002] Indexing plates are common rotary indexing mechanisms in the engineering field, which help to improve work efficiency. Currently, relatively common indexing plates include electromagnetic indexing plates, motor-driven indexing plates, oil cylinder-driven indexing plates, air cylinder-driven indexing plates, manual indexing plates, three-jaw chucks, four-jaw chucks, etc. These several indexing plates have relatively complex structures, are cumbersome to install and repair, and generally have a clamping function, requiring a power element to provide power. They can only be adjusted vertically at 360 degrees and cannot meet the need for occasional intermittent circumferential indexing rotation and locking in the horizontal direction. Summary of the Invention

[0003] In view of the above problems, the technical problem to be solved by the present invention is to provide a circumferential indexing rotary locking mechanism that can be operated without the aid of external tools and can achieve circumferential rotation and indexing locking between two modules in the horizontal direction.

[0004] To achieve the above object, the technical solution of the present invention is: a circumferential indexing rotary locking mechanism, including a fixed disk, a guide post, a locking nut, and a dial, wherein:

[0005] A circular through hole penetrating up and down is provided at the center of the fixed disk. Threaded holes for connecting a rotary module are provided on its upper end surface. Indexing notches are circumferentially formed at the end of its lower end. A bushing is press-fitted at the position of the circular through hole at its bottom.

[0006] The guide post is a hollow tubular structure, which is installed on the bushing through a thrust bearing. The upper end of the guide post is in clearance fit with the fixed disk. A compression spring is sleeved on the guide post, and the compression spring is located between the guide post and the thrust bearing. Oppositely penetrating annular notches are provided on the wall of the guide post. A stop pin is horizontally inserted into the annular notches. A sliding column that can freely slide up and down along the inner hole of the guide post is assembled in the circular hole inside the guide post. The sliding column is inserted on the stop pin and fastened by screws, spring washers, and flat washers, and its sliding range is limited by the stop pin.

[0007] The dial is installed at the lower end of the guide post, and rotating the dial can drive the guide post to rotate.

[0008] The lock nut is threadedly connected to the guide post. A handle is provided on each side of the lock nut. A disc spring is sleeved on the guide post, and the disc spring is located between the lock nut and the bottom of the fixed plate. When the lock nut is tightened, under the action of the disc spring, the stop pin is pushed upward until it is caught in the indexing notch at the bottom of the fixed plate, realizing the indexing positioning and locking of the guide post and the fixed plate. When the lock nut is loosened, the sliding post drives the stop pin to slide down with the loosening of the lock nut under the action of its own gravity until the stop pin completely disengages from the indexing notch at the bottom of the fixed plate, completing the unlocking of the guide post and the fixed plate. Rotating the dial will cause the guide post to drive the heavy object to rotate together.

[0009] Further, it further includes a pressing piece for pushing the stop pin to move, and the pressing piece is sleeved on the guide post between the fixed plate and the disc spring.

[0010] Further, it further includes a first adjusting pad for adjusting the stiffness of the spring, and the first adjusting pad is sleeved on the guide post between the bushing and the thrust bearing.

[0011] Further, it further includes a second adjusting pad for adjusting the position of the handle, and the second adjusting pad is located between the lock nut and the disc spring.

[0012] Further, the fixed plate has a stepped structure with a larger upper part and a smaller lower part. Bolt holes for connecting the slewing module are circumferentially provided on the upper end surface of the fixed plate at equal intervals.

[0013] Further, the lower end of the fixed plate is evenly spaced with U-shaped indexing notches opening downward along its circumference. The central angle B between the center lines of two adjacent indexing notches is 30°. The diameter of the indexing notch section on the fixed plate is larger than the diameter of the adjacent stepped section.

[0014] Further, an axially penetrating annular notch is longitudinally opened on the wall of the guide post, and the stop pin slides up and down in the annular notch on the guide post. The length of the stop pin is greater than or equal to the diameter of the indexing notch section on the fixed plate.

[0015] Further, the upper end of the guide post is in clearance fit with the fixed plate, and a friction plate is provided between the guide post and the fixed plate, and the friction plate is sleeved on the guide post.

[0016] Further, the handle is installed on both sides of the lock nut through short pin shafts and split pins. The two handles can respectively rotate around the short pin shafts. By rotating the handle to tighten the lock nut, the locking and unlocking of the guide post and the fixed plate are realized.

[0017] Further, the dial is installed at the bottom of the guide post through a long pin shaft. A circle of through holes is circumferentially provided on the dial, and the end of the handle is inserted into the through holes on the dial to realize the anti-loosening of the lock nut.

[0018] Based on the above technical solutions, the present invention has at least the following beneficial effects compared with the prior art:

[0019] The present invention is a pure mechanical structure, with a simple structure, compact layout, simple operation and maintenance, easy to manufacture, and can be operated without the aid of external tools. It is suitable for the transitional connection between two mechanical modules that occasionally require intermittent indexing rotation, can easily achieve the relative circumferential rotation in the horizontal direction between the two modules, and has reliable locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is an isometric view of the present invention;

[0021] Figure 2 is a schematic structural view of the present invention;

[0022] Figure 3 is Figure 2 a sectional view taken along the A-A section line;

[0023] Figure 4 is Figure 2 a top view of;

[0024] Figure 5 is a schematic structural view of the fixed disk in the present invention;

[0025] Figure 6 is a schematic structural view of the fixed disk from another perspective in the present invention;

[0026] Figure 7 is a bottom view of the fixed disk in the present invention.

[0027] In the figures: 1 - guide post, 2 - fixed disk, 3 - friction plate, 4 - compression spring, 5 - pressing plate, 6 - first adjusting pad, 7 - second adjusting pad, 8 - bushing, 9 - locking nut, 10 - handle, 11 - dial, 12 - stop pin, 13 - sliding column, 14 - short pin shaft, 15 - long pin shaft, 16 - split pin, 17 - screw, 18 - spring washer, 19 - plain washer, 20 - disc spring, 21 - thrust bearing, 211 - bolt hole, 212 - indexing notch. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the specification, so that those skilled in the art can better understand the technical solutions of the present invention. The embodiments described here are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of protection of the present invention.

[0029] In the present invention, unless otherwise clearly specified or defined, terms such as "installation", "fixation", "connection" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. It may be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] As Figures 1 to 4 shown, it is a schematic embodiment of the circumferential indexing rotary locking mechanism provided by the present invention. In this schematic embodiment, the circumferential indexing rotary locking mechanism includes a guide post 1, a fixed disk 2, a locking nut 9, and a dial 11. A circular through hole penetrating up and down is provided at the center of the fixed disk 2. A threaded hole 211 for connecting a rotary module is provided on its upper end face. A indexing notch 212 is circumferentially provided at the end of its lower end. A bushing 8 is press-fittedly installed at the position of the circular through hole at its bottom.

[0031] The guide post 1 is a hollow tubular structure. The guide post 1 is installed on the bushing 8 through a thrust bearing 21. A first adjusting pad 6 for adjusting the stiffness of the spring is sleeved on the guide post between the bushing 8 and the thrust bearing 21. The upper end of the guide post 1 is in clearance fit with the fixed disk 2. A friction plate 3 is provided between the guide post 1 and the fixed disk 2. A compression spring 4 is sleeved on the guide post 1. The compression spring 4 is located between the guide post 1 and the thrust bearing 21. An annular notch penetrating longitudinally is provided on the wall of the guide post 1. A stop pin 12 is horizontally inserted into the annular notch. The length of the stop pin 12 is greater than or equal to the diameter of the indexing notch section on the fixed disk 2. The stop pin 12 slides up and down in the annular notch on the guide post 1. A sliding column 13 that can freely slide up and down along the inner hole of the guide post 1 is assembled in the round hole inside the guide post 1 in clearance fit. The sliding column 13 is inserted through the stop pin 12 and fastened by screws 17, spring washers 18, and flat washers 19. Its sliding range is limited by the stop pin 12.

[0032] The dial 11 is installed at the bottom of the guide post 1 through a long pin shaft 15. A circle of through holes is circumferentially provided on the dial 11. Rotating the dial 11 can drive the guide post 1 to rotate. When the locking nut 9 rotates to the locking position, rotate the handles 10 on both sides and insert the ends of the handles 10 into the through holes circumferentially distributed on the dial 11 to prevent the locking nut 9 from loosening.

[0033] The lock nut 9 is threadedly connected to the guide post 1. A handle 10 is provided on each side of the lock nut 9. The handles 10 are installed on both sides of the lock nut 9 through short pin shafts 14 and split pins 16. The two handles 10 can rotate around the short pin shafts 14 respectively. By rotating the lock nut 9 through the handles 10, the locking, positioning and unlocking of the guide post 1 and the fixed disk 2 are realized. A disc spring 20 is sleeved on the guide post 1. The disc spring 20 is located between the bottom of the lock nut 9 and the fixed disk 2. The disc spring 20 is used to transmit the pressing force between the lock nut and the fixed disk 2, and can slightly adjust the distribution position of the handle 10 on the lock nut 9 so that the lower end of the handle 10 can be inserted into the through holes arranged in a circle on the dial 11. A pressing piece 5 for pushing the stop pin to move is sleeved on the guide post 1 between the fixed disk 2 and the disc spring 20. A second adjusting pad 7 for adjusting the position of the handle 10 is provided between the lock nut 9 and the disc spring 20.

[0034] When the lock nut 9 is tightened, under the action of the disc spring 20, the pressing piece 5 is pushed, and then the stop pin 12 is pushed to move upward until it is stuck in the indexing notch at the bottom of the fixed disk 2, realizing the indexing positioning and locking of the guide post 1 and the fixed disk 2. In this mechanism, the stop pin 12 is stuck in the indexing notch of the fixed disk 2 to achieve mechanical limit and anti-loosening, so the guide post 1 can be reliably positioned on the fixed disk 2. When the lock nut 9 is loosened, the slide post 13 drives the stop pin 12 to slide down to the lowest position of the annular notch under its own gravity as the lock nut 9 is loosened until the stop pin 12 completely disengages from the indexing notch at the bottom of the fixed disk 2, automatically opening the rotational limit between the guide post and the fixed disk, completing the unlocking of the guide post 1 and the fixed disk 2, and rotating the dial 11 will drive the guide post 1 to rotate the heavy object together.

[0035] The circumferential indexing locking mechanism provided by the present invention can easily realize the circumferential indexing rotation, positioning and locking in the horizontal direction between two modules without the aid of external tools through the above mechanical structure.

[0036] As Figures 5 to 7 shown, in the schematic embodiment of the circumferential indexing locking mechanism provided by the present invention, the fixed disk 2 has a stepped structure with a larger upper part and a smaller lower part. Bolt holes 211 for connecting the rotating module are circumferentially arranged on the upper end surface of the fixed disk 2 at equal intervals. Twelve U-shaped indexing notches 212 opening downward are evenly spaced along the circumference at the lower end of the fixed disk 2. The central angle B between the center lines of two adjacent indexing notches 212 is 30°. The diameter of the indexing notch section on the fixed disk 2 is larger than the diameter of the adjacent stepped section.

[0037] The working process of the circumferential indexing locking mechanism provided by the present invention is as follows:

[0038] In actual work, a heavy object is installed at the top of the guide post 1. First, assume that the circumferential indexing locking mechanism is in a locked state. When unlocking, lift the handles 10 on both sides of the locking nut 9 upward so that the ends of the handles 10 are disengaged from the round holes on the dial 11. Then rotate the handles to near horizontal and then counterclockwise. As the locking nut 9 loosens, the guide post 1 expands the friction plate 3 under the action of the compression spring 4, and can slowly lift the heavy object installed on the guide post 1 to be completely separated from the support plane. Since the weight of the heavy object directly presses on the thrust bearing 21, the rotational friction can be effectively reduced. Continue to loosen the locking nut 9. At the same time, the sliding column 13 drives the stop pin 12 to slide down under its own gravity as the locking nut 9 is loosened. Continue to loosen the locking nut 9 until the stop pin 12 is completely disengaged from the circumferentially arranged indexing notch 212 at the lower end of the fixed disk 2. At this time, the guide post 1 and the fixed disk 2 are unlocked. By rotating the dial 11, the guide post 1 drives the heavy object to rotate together. Due to the action of the thrust bearing 21, the dial 11 can be easily rotated. When rotated to the appropriate position, perform the reverse operation, tighten the locking nut 9 clockwise so that the stop pin 12 is stuck in the circumferentially arranged indexing notch 212 at the lower end of the fixed disk 2, and the rotation, indexing positioning, and locking of the supported heavy object can be achieved. After locking, rotate the handles 10 on both sides of the locking nut 9 to the vertical position. When the ends of the handles 10 are inserted into the round holes distributed circumferentially on the dial 11, the anti-loosening of the locking nut 9 can be achieved, and thus the purpose of indexing positioning and locking can be achieved.

[0039] The circumferential indexing locking mechanism provided by the present invention is a pure mechanical device, without any power components, with a simple structure, a compact layout, easy to manufacture, simple to operate, low maintenance cost, and is convenient to be transplanted to some parts of industrial production platforms or construction machinery that require indexing rotation. It is suitable for the connection between two mechanical modules that occasionally require intermittent indexing rotation, and can easily achieve the horizontal relative rotation between the two modules and reliable locking.

[0040] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. Circumferential indexing rotary locking mechanism, characterized in that: It includes a fixed disk, guide posts, lock nuts and a dial, where: A circular through-hole penetrating up and down is provided at the center of the fixed disk. Threaded holes for connecting the slewing module are provided on its upper end face. Indexing notch openings are circumferentially provided at the end of its lower end. A bushing is press-fitted at the position of the circular through-hole at its bottom; The guide post is a hollow tubular structure. It is installed on the bushing through a thrust bearing. The upper end of the guide post is in clearance fit with the fixed disk. A compression spring is sleeved on the guide post. The compression spring is located between the guide post and the thrust bearing. Opposite through annular notches are provided on the wall of the guide post. A stop pin is horizontally inserted into the annular notch. A sliding column that can freely slide up and down along the inner hole of the guide post is assembled in the circular hole inside the guide post. The sliding column is inserted on the stop pin and fastened by screws, spring washers and plain washers. Its sliding range is restricted by the stop pin; The dial is installed at the lower end of the guide post. Rotating the dial can drive the guide post to rotate; The lock nut is threadedly connected to the guide post. A handle is provided on each side of the lock nut. A disc spring is sleeved on the guide post. The disc spring is located between the lock nut and the bottom of the fixed disk; When the lock nut is tightened, the stop pin is pushed upward under the action of the disc spring until it snaps into the indexing notch at the bottom of the fixed disk, realizing the indexing positioning and locking of the guide post and the fixed disk; When the lock nut is loosened, the sliding column drives the stop pin to slide down with the loosening of the lock nut under its own gravity until the stop pin completely disengages from the indexing notch at the bottom of the fixed disk, completing the unlocking of the guide post and the fixed disk. Rotating the dial will drive the guide post to drive the heavy object to rotate together.

2. The circumferential indexing type rotary locking mechanism according to claim 1, wherein: It also includes a pressing piece for pushing the stop pin to move. The pressing piece is sleeved on the guide post between the fixed disk and the disc spring.

3. The circumferential indexing type rotary locking mechanism according to claim 1, characterized in that: It also includes a first adjusting pad for adjusting the stiffness of the spring. The first adjusting pad is sleeved on the guide post between the bushing and the thrust bearing.

4. The circumferential indexing type rotary locking mechanism according to claim 1, wherein: It also includes a second adjusting pad for adjusting the position of the handle. The second adjusting pad is located between the lock nut and the disc spring.

5. The circumferential indexing type rotary locking mechanism according to claim 1, wherein: The fixed disk has a stepped structure with a larger upper part and a smaller lower part. Bolt holes for connecting the slewing module are circumferentially provided on the upper end face of the fixed disk at equal intervals.

6. The circumferential indexing type rotary locking mechanism according to claim 1 or 5, characterized in that: U-shaped indexing notch openings opening downward are evenly spaced along the circumference at the lower end of the fixed disk. The central angle B between the center lines of two adjacent indexing notch openings is 30°. The diameter of the indexing notch section on the fixed disk is larger than the diameter of the adjacent stepped section.

7. The circumferential indexing type rotary locking mechanism according to claim 1, wherein: Longitudinally opposite through annular notches are provided on the wall of the guide post. The stop pin slides up and down in the annular notch on the guide post. The length of the stop pin is greater than or equal to the diameter of the indexing notch section on the fixed disk.

8. The circumferential indexing type rotary locking mechanism according to claim 1, characterized in that: The upper end of the guide post is in clearance fit with the fixed disk. A friction plate is provided between the guide post and the fixed disk. The friction plate is sleeved on the guide post.

9. The circumferential indexing type rotary locking mechanism according to claim 1, wherein: The handle is installed on both sides of the lock nut through short pin shafts and split pins. The two handles can rotate around the short pin shafts respectively. Rotating the handle to tighten the lock nut realizes the locking and unlocking of the guide post and the fixed disk.

10. The circumferential indexing type rotary locking mechanism according to claim 1, characterized in that: The dial is installed at the bottom of the guide post through a long pin shaft. A circle of through holes is circumferentially arranged on the dial. The end of the handle is inserted into the through holes on the dial to prevent the locking nut from loosening.

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