Connection structure with automatically adjustable eccentricity

Abstract

The present invention relates to a connection structure capable of automatically adjusting eccentricity, comprising a locking part and a pin part respectively disposed on two members, and an adjusting part provided between the locking part and the pin part, the locking part comprises a locking sleeve opening toward the pin part, a supporting bush screwed into the open end of the locking sleeve, a floating bush movably provided on the supporting bush and a locking mechanism provided on the floating bush, the floating bush being movable along the radial direction of the locking sleeve, the pin part comprises a pin sleeve and a pin head, the pin sleeve opening toward the locking part, the pin head comprises a threaded end screwed into the open end of the pin sleeve and a pin end fixed to the threaded end, an annular slot is opened on the upper outer periphery of the pin end, and after the pin end protrudes upward from the supporting bush and the floating bush, the annular slot is fitted into and fixed with the locking mechanism, the adjusting part is fitted onto the pin end and can control the insertion depth of the pin head into the locking sleeve, and the other end of the locking sleeve and the other end of the pin sleeve are respectively provided with connectors.

Description

Technical Field

[0001] The present invention relates to a connection structure capable of automatically adjusting eccentricity, and belongs to the technical field of pin-lock connection structures.

Background Art

[0002] In recent years, the insertion structure has been widely applied to member connections in various fields. This structure has the advantages of not requiring welding, not requiring a curing agent, being able to automatically adapt to the eccentricity of the connector, and being easy to implement, and is suitable for the connection of various assembled structures.

[0003] The Chinese invention patent "Pin-lock connection structure with adjustable eccentricity" with the authorization announcement number CN212455135U discloses a pin-lock connection structure with adjustable eccentricity, including a lock part and a pin part arranged on two members respectively and not coaxial. An eccentricity structure is further provided between the lock part and the pin part. The lock part includes a lock sleeve opened towards the pin part and a lock locking mechanism provided in the lock sleeve. A connector is fitted to the other end of the lock sleeve. The pin part includes a pin sleeve opened towards the lock part, and another connector is fitted to the other end of the pin sleeve. The eccentricity structure includes a vertical and hollow bush and a stepped shaft-shaped pin that becomes larger from top to bottom. The outer periphery of the bush is coaxially fitted into the lock sleeve, the large end of the pin is coaxially fitted into the pin sleeve, the small end of the pin can be inserted into the bush upwards, the eccentricity structure can be adjusted, the small end of the pin overlaps with the inner peripheral axis of the bush, penetrates the bush upwards and is inserted into the lock sleeve, and can be fitted with the lock locking mechanism to lock. In this pin-lock connection structure with adjustable eccentricity, by providing an eccentricity structure between the pin part and the lock part, even if the axes of the pin part and the lock part do not overlap, the normal insertion operation can be performed by adjusting the eccentricity structure.

[0004] In the above patent, an eccentric structure is used to make the insertion operation somewhat easier. However, in actual use, since the pin head and the eccentric bush in the lock sleeve need to fit tightly, a large gap cannot be left between the outer periphery of the pin head and the eccentric hole of the eccentric bush. To ensure that the pin head can be inserted into the eccentric hole, the eccentricity of the eccentric bush must be accurately adjusted when adjusting it. The lock part and the pin part are also located on two different members, and there is not enough space between the two members for the operator to check the fitting situation between the pin head and the eccentric hole. Thus, to achieve a good fit between the pin head and the eccentric hole, the eccentric bush needs to be adjusted repeatedly multiple times. Therefore, this form is still not simple.

Summary of the Invention

Problems to be Solved by the Invention

[0005] To overcome the above problems, the present invention uses a floating bush. During the process of inserting the pin head into the lock sleeve, under the guiding action of the guiding head, the floating bush moves along the radial direction of the lock sleeve, and as the pin head continues to enter the lock sleeve, automatic eccentricity correction and compensation are performed, and it fits with the lock locking mechanism to complete the locking, providing an automatically adjustable connection structure for realizing the fixation between the pin part and the lock part.

Means for Solving the Problems

[0006] The technical solution of the present invention is as follows.

[0007] An adjustable connection structure for automatically adjusting eccentricity, including a locking part and a pin part respectively arranged on two members, and an adjusting part is provided between the locking part and the pin part. The locking part includes a locking sleeve opened towards the pin part, a support bush screwed on the open end of the locking sleeve, a floating bush movably provided on the support bush, and a locking mechanism provided on the floating bush. The floating bush is movable along the radial direction of the locking sleeve. The pin part includes a pin sleeve and a pin head. The pin sleeve is opened towards the locking part. The pin head includes a threaded end threadedly connected to the open end of the pin sleeve and a pin end fixed to the threaded end. An annular slot is opened on the upper outer periphery of the pin end. After the pin end protrudes upwards from the support bush and the floating bush, the annular slot is fitted and fixed to the locking mechanism. The adjusting part is externally fitted on the pin end and can control the insertion depth of the pin head into the locking sleeve. Connectors are respectively provided at the other ends of the locking sleeve and the pin sleeve.

[0008] Furthermore, the locking mechanism includes a pressing frame and a locking member. The inner periphery of the locking member is externally fitted on the outer periphery of the annular slot. The lower part of the locking member is housed in the upper part of the inner periphery of the floating bush. The pressing frame includes a pressing ring, a support pipe and a retaining ring. The pressing ring is horizontally provided and externally fitted above the outer side of the annular slot. The pressing ring is pressed by the locking member. The support pipe is vertical and hollow, fixed to the upper inner end of the pressing ring, located on the outer periphery of the pin end. The retaining ring is vertical and hollow, fixed to the lower outer end of the pressing ring and located on the outer side of the locking member, above the floating bush.

[0009] Furthermore, the locking member includes a rubber ring and a plurality of arc-shaped ring blocks. The inner circumference of the rubber ring is externally fitted to the outer circumference of the annular slot. The lower part of the rubber ring is housed in the upper part of the inner circumference of the floating bush. The rubber ring presents an annular structure with a hollow interior. The plurality of arc-shaped ring blocks can form a complete annular structure by surrounding each other. The annular structure formed by the arc-shaped ring blocks is housed inside the annular structure of the rubber ring.

[0010] Furthermore, the pin end includes an insertion rod, the annular slot, and a guide head. The insertion rod is fixed to the upper end of the threaded end. The annular slot is annularly provided on the outer peripheral wall of the tip of the insertion rod. The guide head is fixed to the upper end of the annular slot and presents a frustum-shaped structure that becomes smaller from top to bottom.

[0011] Furthermore, it further includes an eccentric bush. The outer circumference of the eccentric bush is screw-connected to the inside of the open end of the pin sleeve. The threaded end of the pin head is screw-connected to the inner circumference of the eccentric bush and is provided eccentrically with respect to the pin sleeve.

[0012] Furthermore, it further includes an elastic member that is externally fitted to the outer circumference of the support pipe, whose upper end is in close contact with the lower part of the inner end face of the lock sleeve, and whose lower end is in close contact with the upper end of the pressing ring.

[0013] Furthermore, it further includes a gasket that is fixed to the lower part of the inner end face of the lock sleeve and to which the upper end of the elastic member is in close contact at its lower end.

[0014] Furthermore, the adjusting part includes an adjusting nut and a cotter. A vertical and hollow through-hole for the pin head to penetrate is formed in the middle of the adjusting nut. A vertical key groove communicating with the through-hole is formed inside the adjusting nut. One side of the cotter is engaged and fixed in the key groove. A vertical chute is axially formed along the outer peripheral wall of the pin end. The upper end of the chute communicates with the annular slot. The through-hole of the adjusting nut is externally fitted on the outside of the pin end. The other side of the cotter is slidable within the chute.

[0015] Furthermore, the elastic member is a flexible rubber tube.

Advantages of the Invention

[0016] The present invention has the following beneficial effects.

[0017] 1. The connection structure capable of automatically adjusting eccentricity uses a floating bush. During the process of inserting the pin head into the lock sleeve, under the guiding action of the guiding head, the floating bush moves along the radial direction of the lock sleeve, and as the pin head continues to enter the lock sleeve, automatic eccentricity correction and compensation are performed, and it fits with the locking mechanism to complete locking, realizing the fixation between the pin part and the lock part.

[0018] 2. The floating bush is movable along the radial direction of the lock sleeve. A thrust groove matching with the guiding head of the pin head is provided on the fixed bracket. When the pin head enters the lock sleeve, the guiding head contacts the thrust groove of the fixed bracket and then fits with the thrust groove through the conical frustum slope of the guiding head, automatically guiding the floating bush and the fixed bracket, realizing automatic eccentricity correction, and finally completing the insertion operation.

[0019] 3. The pin end has a space for lateral movement within the support bush, and the floating bush is movable along the radial direction of the lock sleeve. Thus, even when the pin part and the lock part are inserted, the pin part can move along the radial direction of the lock part for slight adjustment, enabling the smooth insertion of other pin parts and lock parts in the two members. After inserting all the pin parts and lock parts, the final assembly of the two members is completed by finally tightening the adjustment part.

Brief Description of the Drawings

[0020]

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Embodiments for Carrying Out the Invention

[0021] Hereinafter, the present invention will be described in detail with reference to the drawings and specific embodiments.

[0022] Referring to FIGS. 1-20, it includes a lock part 1 and a pin part 2 arranged on two members respectively. An adjustment part 3 is provided between the lock part 1 and the pin part 2. The lock part 1 includes a lock sleeve 11 opened towards the pin part 2, a support bush 12 screwed on the open end of the lock sleeve 11, a floating bush 13 movably provided on the support bush 12, and a lock locking mechanism provided on the floating bush 13. The floating bush 13 is movable along the radial direction of the lock sleeve 11. The pin part 2 includes a pin sleeve 21 and a pin head 4. The pin sleeve 21 is opened towards the lock part 1. The pin head 4 includes a screw end 41 screwed to the open end of the pin sleeve 21 and a pin end 42 fixed to the screw end 41. An annular slot 44 is opened on the upper outer periphery of the pin end 42. After the pin end 42 protrudes upward from the support bush 12 and the floating bush 13, the annular slot 44 is fitted and fixed to the lock locking mechanism. The adjustment part 3 is externally fitted on the pin end 42 and can control the insertion depth of the pin head 4 into the lock sleeve 11. Connectors 7 are provided at the other ends of the lock sleeve 11 and the pin sleeve 21 respectively.

[0023] Based on the above description, the connection structure capable of automatically adjusting the eccentricity mainly includes a locking part 1, a pin part 2 and an adjusting part 3. The locking part 1 includes a lock sleeve 11, a support bush 12, a floating bush 13, a lock locking mechanism and a connector 7. The end of the lock sleeve 11 facing the pin part 2 is provided in an open manner. The support bush 12 is screwed to the open end of the lock sleeve 11. The floating bush 13 is movably provided on the support bush 12 and is movable along the radial direction of the lock sleeve 11. The lock locking mechanism is provided on the floating bush 13 and is movable along with the floating bush 13 during the movement of the floating bush 13. The pin part 2 includes a pin sleeve 21, a pin head 4 and another connector 7. The end of the pin sleeve 21 facing the locking part 1 is provided in an open manner. The pin head 4 includes a threaded end 41, a pin end 42 and an annular slot 44. The threaded end 41 is threadedly connected to the open end of the pin sleeve 21. The pin end 42 is fixed to the threaded end 41 and can be inserted into the lock sleeve 11. The annular slot 44 is opened on the upper outer peripheral wall of the pin end 42 and is fitted with the lock locking mechanism to lock the pin end 42 in the lock sleeve 11. After the pin end 42 protrudes from the support bush 12 and the floating bush 13 in sequence upwards, the annular slot 44 can be fitted and fixed to the lock locking mechanism. The adjusting part 3 is externally fitted to the pin end 42 and can control the insertion depth of the pin end 42 into the lock sleeve 11. The connector 7 is used to fix the locking part 1 and the pin part 2 to the members respectively.

[0024] In particular, since the outer diameter of the floating bush 13 is smaller than the inner diameter of the lock sleeve 11, the floating bush 13 is movable along the radial direction of the lock sleeve 11 before the pin end 42 is locked by the locking mechanism. To ensure that the pin end 42 can pass through the inner circumference of the floating bush 13, the outer diameter of the pin end 42 should be slightly smaller than the inner diameter of the floating bush 13.

[0025] In particular, the connector 7 is a steel bar or a steel rod. Also, the connector 7 is fitted to the locking part 1 or the pin part 2 so that a header is provided or it is threadedly connected.

[0026] In particular, the screw end 41 is provided coaxially with the pin end 42.

[0027] Furthermore, the locking mechanism includes a pressing frame 55 and a locking member 6. The inner circumference of the locking member 6 is externally fitted to the outer circumference of the annular slot 44. The lower part of the locking member 6 is housed in the upper part of the inner circumference of the floating bush 13. The pressing frame 55 includes a pressing ring 56, a support pipe 57, and a retaining ring 58. The pressing ring 56 is provided horizontally and is externally fitted above the outside of the annular slot 44 and is pressed by the locking member 6. The support pipe 57 is vertical and hollow, is fixed to the upper end inside the pressing ring 56, and is located on the outer circumference of the pin end 42. The retaining ring 58 is vertical and hollow, is fixed to the lower end outside the pressing ring 56, and is located outside the locking member 6 and above the floating bush 13.

[0028] Based on the above description, the locking mechanism includes a pressing frame 55 and a locking member 6. The pressing frame 55 includes a pressing ring 56, a support pipe 57, and a retaining ring 58. The pressing ring 56 is externally fitted above the outside of the annular slot 44 and is pressed by the locking member 6. The support pipe 57 is fixed to the upper end inside the pressing ring 56 and is located on the upper outer circumference of the pin end 42. The retaining ring 58 is fixed to the lower end outside the pressing ring 56 and is outside the locking member 6 and above the floating bush 13. The locking member 6 is externally fitted to the annular slot 44. The annular slot 44, the upper part of the inner circumference of the floating bush 13, the inner circumference of the retaining ring 58, and the lower end surface of the pressing ring 56 surround to form a storage space for fixing the locking member 6. The pin end 42 is inserted into the lock sleeve 11. When the locking member 6 enters the annular slot 44, it is locked inside the lock sleeve 11, and the fixation between the pin part 2 and the lock part 1 is realized.

[0029] In particular, before installation, the main structure of the locking mechanism consists of a fixed bracket 5 and a locking member 6. The fixed bracket 5 includes a base 51 and the pressing frame 55 provided coaxially from bottom to top in sequence. The base 51 has a cylindrical shape with a thrust groove 52 provided on its lower end face. An annular groove 53 is opened annularly on the outer periphery of the upper end of the base 51. A plurality of ribs 54 are fixed to the outside of the upper end of the annular groove 53 at uniform intervals along the circumferential direction, and the other ends of the ribs 54 are fixed to the inner circumference of the pressing ring 56. The annular groove 53 of the fixed bracket 5 is a member for preliminarily fixing the locking member 6 when the lock part 1 is installed. When installing, the outer periphery of the base 51 is fitted into the inner circumference of the floating bush 13. During use, the pin end 42 of the pin head 4 enters the lock sleeve 11. After the top of the pin end 42 abuts against the thrust groove 52, the thrust groove 52 fits with the top of the pin end 42 to achieve eccentricity correction, so that the floating bush 13, which was originally freely movable along the radial direction of the lock sleeve 11, can be automatically restored and aligned. Then, the thrust groove 52 continues to receive the pushing force of the pin end 42. After the top of the support tube 57 of the pressing frame 55 abuts against the inner end face of the lock sleeve 11, the base 51 rises and the rib 54 is broken by force, and the fixed bracket 5 is separated into the base 51 and the pressing frame 55. The pressing frame 55 serves to crimp and fix the locking member 6, and the base 51 is located inside the support tube 57.

[0030] In particular, when installing the fixed bracket 5, a plurality of flanges 59 are further uniformly provided on the outer periphery of the base 51 so that the base 51 can be more easily engaged with the inner circumference of the floating bush 13.

[0031] In particular, the strength of the rib 54 is much lower than that of the base 51 and the pressing frame 55 in order to normally separate the base 51 and the pressing frame 55.

[0032] In particular, the distance between the upper end of the support tube 57 and the inner end face of the locking sleeve 11 should be smaller than the maximum upward stroke after the locking member 6 is pushed by the base 51. In this way, when the locking member 6 is pushed by the base 51 to push up the pressing frame 55, the support tube 57 is pushed. After the rib 54 of the fixed bracket 5 is broken, the base 51 and the pressing frame 55 are separated, and the support tube 57 that was originally pushed releases the elastic force and can push the locking member 6 into the annular slot 44 of the pin end 42 through the pressing ring 56.

[0033] In particular, the inner diameter of the retaining ring 58 should be slightly smaller than the sum of the outer diameter of the base 51 and twice the length of the cross-section of the locking member 6. The locking member 6 is pushed by the base 51. After the rib 54 is broken, the base 51 is abutted against the inside of the support tube 57. During the upward movement of the base 51, the locking member 6 is temporarily fitted outside the base 51. At this time, the retaining ring 58 is pushed. After the base 51 passes through the pressing ring 56 and the locking member 6 and the base 51 are separated, the retaining ring 58 that was originally pushed releases the elastic force and can push the locking member 6 into the annular slot 44 of the pin end 42 inward.

[0034] In particular, the inner diameter of the locking member 6 is slightly smaller than the inner diameter of the groove bottom of the annular slot 44 so that the locking member 6 can be externally fitted into the annular slot 44.

[0035] In particular, the inner diameters of the pressing ring 56 and the support tube 57 are larger than the outer diameter of the pin end 42 and the outer diameter of the base 51 so that the pin end 42 and the base 51 can pass through normally.

[0036] In particular, in order to fix the locking member 6 better, inclined grooves 16 are opened inclinedly at the upper part of the inner circumference of the floating bush 13.

[0037] In particular, the included angle α between the inclined groove 16 and the upper end of the annular slot 44 should be smaller than 180°, and the distance between the side closer to the axis of the pin end 42 of the inclined groove 16 and the side closer to the axis of the pin end 42 of the annular slot 44 should be larger than the distance between the sides away from the axes of both pin ends 42. In this way, after locking the pin part 2 and the lock part 1, the inclined groove 16 and the annular slot 44 can engage the locking member 6 and prevent the locking member 6 from coming out of the annular slot 44. Preferably, α is 15°.

[0038] In particular, since the outer diameter of the pin end 42 is smaller (even much smaller) than the inner diameter of the support bush 12, the pin end 42 has a certain space for lateral movement within the support bush 12. Thus, when fitting the pin part 2 and the lock part 1 in the two members, even if the pin head 4 of the pin part 2 and the support bush 12 of the lock part 1 are not coaxial, as long as the pin end 42 can normally enter the support bush 12 after adjustment, eccentricity correction can be achieved by the fitting within the guide between the top of the pin end 42 and the thrust groove 52 of the fixed bracket 5. Furthermore, the floating bush 13, which was originally freely movable along the radial direction of the lock sleeve 11, automatically returns and aligns, and then the insertion and fitting between the pin part 2 and the lock part 1 is completed. Note that after inserting a set of the pin part 2 and the lock part 1 in the two members, if the pin head 4 and the support bush 12 are not aligned and this alone prevents the attachment of other pin parts 2 and lock parts 1 in the member, the pin end 42 has a certain space for lateral movement within the support bush 12 and the floating bush 13 is movable along the radial direction of the lock sleeve 11. As a result, even when the pin part 2 and the lock part 1 are inserted, the pin part 2 can move along the radial direction of the lock part 1 and be slightly adjusted, and other pin parts 2 and lock parts 1 in the member can be inserted smoothly. After all the pin parts 2 and lock parts 1 are inserted, the final assembly work is completed by tightening the adjusting part 3.

[0039] In particular, the difference between the outer diameter of the floating bush 13 and the inner diameter of the lock sleeve 11 should be slightly larger than the difference between the outer diameter of the pin end 42 and the inner diameter of the support bush 12.

[0040] Furthermore, the locking member 6 includes a rubber ring 61 and a plurality of arc-shaped ring blocks 62. The inner circumference of the rubber ring 61 is externally fitted to the outer circumference of the annular slot 44. The lower part of the rubber ring 61 is housed in the upper part of the inner circumference of the floating bush 13. The rubber ring 61 has an annular structure with a hollow interior. The plurality of arc-shaped ring blocks 62 can form a complete annular structure by surrounding, and the annular structure formed by the arc-shaped ring blocks 62 is housed inside the annular structure of the rubber ring 61.

[0041] Based on the above description, the locking member 6 includes a rubber ring 61 and a plurality of arc-shaped ring blocks 62. The rubber ring 61 is externally fitted to the annular slot 44, and the interior of the rubber ring 61 is hollow and houses the arc-shaped ring blocks 62. The rubber ring 61 has elasticity and flexibility, and the pin end 42 and the base 51 can pass through its inner circumference and can recover to its original shape and be externally fitted to the annular slot 44. The plurality of arc-shaped ring blocks 62 can form a complete annular structure by surrounding and lock into the annular slot 44. The plurality of arc-shaped ring blocks 62 are separated so that the pin end 42 and the base 51 can pass through, and finally, under the action of the elastic force of the rubber ring 61, they can also lock into the annular slot 44.

[0042] In particular, during processing, the locking member 6 can be processed by applying a rubber coating to the arc-shaped ring blocks 62.

[0043] In particular, the locking member 6 may be a plurality of balls.

[0044] Furthermore, the pin end 42 includes an insertion rod 43, the annular slot 44, and a guide head 45. The insertion rod 43 is fixed to the upper end of the threaded end 41. The annular slot 44 is annularly provided on the outer peripheral wall of the tip of the insertion rod 43. The guide head 45 is fixed to the upper end of the annular slot 44 and has a frustum-shaped structure that tapers from top to bottom.

[0045] Based on the above description, the pin end 42 includes an insertion rod 43, an annular slot 44, and a guide head 45. The guide head 45 has a frustum-shaped structure that tapers from top to bottom. By mainly utilizing the inclined surface structure of the frustum surface, while inserting the pin end 42 along the axial direction into the lock sleeve 11, the fixed bracket 5 and the floating bush 13 can be pulled by the thrust groove 52 in the radial direction. The floating bush 13, which was originally freely movable along the radial direction of the lock sleeve 11, can be automatically returned and aligned, which is advantageous for subsequent insertion operations.

[0046] In particular, the thrust groove 52 of the base 51 is matched with the frustum-shaped structure of the guide head 45 so that the guide head 45 can better pull the fixed bracket 5.

[0047] In particular, the height position of the annular slot 44 at the pin end 42 should be matched with the position of the inclined groove 16 of the floating bush 13 in the lock sleeve 11. The annular slot 44 should be slightly higher than the position of the inclined groove 16 to prevent the insertion rod 43 from being too short and the annular slot 44 not reaching the appropriate position and thus unable to complete the installation, or the insertion rod 43 being too long and the locking member 6 installed at the appropriate position being pushed by the insertion rod 43 and malfunctioning.

[0048] In particular, the bottom of the inclined groove 16 and the upper part of the annular slot 44 can be provided in an arc shape, which is adapted to the outer periphery of the locking member 6, aims to enhance the covering effect on the locking member 6 and prevent it from falling off. Also, the arc-shaped surface can increase the force-receiving area and improve the force-receiving situation of the locking member 6.

[0049] Furthermore, it further includes an eccentric bush 22. The outer periphery of the eccentric bush 22 is screwed to the inside of the open end of the pin sleeve 21, and the threaded end 41 of the pin head 4 is screwed to the inner periphery of the eccentric bush 22. The threaded end 41 of the pin head 4 is provided eccentrically with respect to the pin sleeve 21.

[0050] Based on the above description, an eccentric bush 22 is further provided between the pin head 4 and the pin sleeve 21. By providing the eccentric bush 22, mainly the pin end 42 of the pin head 4 and the pin sleeve 21 are eccentrically processed. After adjusting the eccentric bush 22, the eccentric pin end 42 can be at different positions within the support bush 12, which is advantageous for the eccentric correction operation.

[0051] In particular, the bottom of the eccentric bush 22 is provided in a closed manner so that the pin head 4 does not fall out from the bottom of the eccentric bush 22.

[0052] In particular, in order to easily adjust the support bush 12 or the eccentric bush 22, locking ports 17 are opened at both the lower end of the support bush 12 and the upper end of the eccentric bush 22.

[0053] Furthermore, it further includes an elastic member 14 that is externally fitted to the outer periphery of the support tube 57, with its upper end in close contact with the lower side of the inner end face of the lock sleeve 11 and its lower end in close contact with the upper end of the pressing ring 56. The elastic member 14 mainly serves as a support and provides an elastic force so that the pressing frame 55 firmly presses the locking member 6.

[0054] Furthermore, it further includes a gasket 15 that is fixed below the inner end face of the lock sleeve 11 and with the upper end of the elastic member 14 in close contact with its lower end. The gasket 15 is mainly used to provide a complete and smooth plane to prevent the upper end of the support tube 57 or the upper end of the elastic member 14 from being locked and immovable due to the fitting problem between the connector 7 and the inner end face of the lock sleeve 11, which may cause a failure problem where the locking member 6 and the pin head 4 cannot be properly fitted.

[0055] Furthermore, the adjusting part 3 includes an adjusting nut 31 and a cotter 33. In the middle part of the adjusting nut 31, a vertical and hollow through hole for the pin head 4 to penetrate is opened. Inside the adjusting nut 31, a vertical key groove 32 communicating with the through hole is opened. One side of the cotter 33 is engaged and fixed in the key groove 32. On the outer peripheral wall of the pin end 42, a vertical chute 46 is axially opened. The upper end of the chute 46 communicates with the annular slot 44. The through hole of the adjusting nut 31 is externally fitted outside the pin end 42, and the other side of the cotter 33 is slidable within the chute 46.

[0056] Based on the above description, the adjusting part 3 includes an adjusting nut 31 and a cotter 33. A key groove 32 is opened in the through hole in the middle part of the adjusting nut 31, and one side of the cotter 33 is engaged and fixed in the key groove 32. A chute 46 is opened on the outer peripheral wall of the pin end 42, and the other side of the cotter 33 is slidable within the chute 46. In this way, when the adjusting nut 31 is rotated, the pin head 4 can be rotated by the fitting between the cotter 33 and the chute 46. By the screw fitting between the screw end 41 and the pin sleeve 21, the pin head 4 can be advanced and retracted and can be inserted into and withdrawn from the lock sleeve 11.

[0057] In particular, the chute 46 is opened in the insertion rod 43 of the pin end 42.

[0058] Furthermore, the elastic member 14 is a flexible rubber tube.

[0059] In particular, the elastic member 14 may be a spring.

[0060] The operating principle of the present invention is as follows.

[0061] Referring to FIGS. 6-7, it is a schematic view of the initial mounting state of the locking portion 1. At this time, the fixed bracket 5 is attached to the inner circumference of the floating bush 13, the locking member 6 is attached to the annular groove 53, and the floating bush 13 is movable along the radial direction of the lock sleeve 11. A gap is left between the upper end of the support pipe 57 and the gasket 15, and the elastic member 14 is in a pressed state.

[0062] Referring to FIG. 11, it is a schematic view of the initial mounting state of the pin portion 2. At this time, only the guide head 45 and a part of the annular slot 44 are higher than the upper end of the adjusting nut 31.

[0063] In use, first, one member is suspended over the other member, and the relative position between the two members is adjusted so that the pin portion 2 and the locking portion 1 that fit into each other in the two members can be substantially aligned. Then, the insertion operation is started.

[0064] Referring to FIGS. 17-18, in the first stage - the eccentric correction stage, by rotating the adjusting nut 31, the pin head 4 is inserted into the lock sleeve 11. The pin end 42 enters the support bush 12, the upper part of the guide head 45 contacts the thrust groove 52 of the fixed bracket 5, and due to the guiding action of the conical table surface of the guide head 45, by pulling the floating bush 13 and the lock locking mechanism, the floating bush 13 and the lock locking mechanism can finally be coaxial with the pin head 4.

[0065] Particularly, in the most extreme state, that is, when the pin end 42 is in close contact with the inner circumference of the support bush 12 towards one side, and the floating bush 13 and the lock locking mechanism are in close contact with the inner circumference of the lock sleeve 11 towards the other side, at this time, the outer side of the upper part of the guide head 45 can still be located within the range where it is located inside the lower part of the thrust groove 52, so that the guide head 45 can realize the function of eccentric correction.

[0066] Referring to FIGS. 13-14, in the second stage - the pushing stage, as the pin end 42 continues to advance, the tip of the guide head 45 abuts against the end face of the thrust groove 52. As the pin end 42 continues to advance, the fixed bracket 5 is pushed up until the tip of the support tube 57 contacts the gasket 15 and the support tube 57 is pressed. At the same time, the elastic member 14 is continuously pushed. As the pin end 42 continues to advance, the rib 54 is broken by the force, and the fixed bracket 5 is separated from the base 51 and the pressing frame 55.

[0067] Referring to FIGS. 15-16, in the third stage - the transition stage, after the base 51 and the pressing frame 55 are separated, as the pin end 42 continues to advance, since the lower outer diameter of the annular groove 53 gradually expands, the locking member 6 expands along the lower part of the annular groove 53 and finally surrounds the outside of the base 51. At the same time, since the locking member 6 expands outwards, it rises along the inclined groove 16 of the floating bush 13. At this time, the locking member 6 is in the maximum expansion state and the maximum height stroke state. At the same time, since the locking member 6 expands outwards and rises, the pressing frame 55 is pushed up by the locking member 6, the support tube 57 and the elastic member 14 are pressed, and both are in the state of being pressed to the maximum. In addition, the outer periphery of the locking member 6 also presses the inner periphery of the retaining ring 58.

[0068] Referring to FIGS. 1 - 5, in the fourth stage - the locking stage, the base 51 passes through the pressing ring 56, and the pin end 42 continues to advance until the locking member 6 is separated from the outer periphery of the base 51. As the pin end 42 continues to advance, the locking member 6 moves from the outside of the guide head 45 to the outside of the annular slot 44. The originally pressed retaining ring 58 releases the elastic force and pushes the locking member 6 inward. Since the outer diameter of the annular slot 44 is smaller than the outer diameter of the guide head 45, under the action of the elastic force of the rubber ring 61, the locking member 6 shrinks and returns inward and is externally fitted into the annular slot 44. At the same time, the originally pressed support tube 57 and the elastic member 14 release the elastic force, push down the pressing frame 55, and push the locking member 6 by the pressing ring 56 along the inclined groove 16 of the floating bush 13 to move downward, press the locking member 6 into the annular slot 44, and realize the locking function.

[0069] After the insertion of all connection structures in the two members is completed, the connection structures are adjusted one by one. By rotating the adjusting nut 31, the pin head 4 is brought to the maximum forward state. Since the annular slot 44 is slightly higher than the position of the inclined groove 16, after the pin head 4 reaches the maximum forward state, the locking member 6 is slightly pushed by the insertion rod 43 and still remains in the inclined groove 16 of the floating bush 13, and the entire connection structure will not fail. Also, it ensures that the locking member 6 is in the annular slot 44 and ensures the locking effect. Then, by rotating the adjusting nut 31 in the reverse direction to retract the pin head 4, the locking can be completed. Since the included angle α between the inclined groove 16 and the upper end of the annular slot 44 is smaller than 180°, after the pin head 4 retracts, the locking member 6 stays in the annular slot 44 due to the included angle α and effectively prevents the locking member 6 from falling off without expanding outward again.

[0070] After the insertion of all connection structures in the two members is completed, a sealing material such as cement or adhesive is applied to the gap between the lock sleeve 11 and the pin sleeve 21 to fill the gap between the connection structures, increase the connection strength of the connection structures, and prevent the connection structures from loosening, corroding, and malfunctioning.

[0071] Referring to FIGS. 19-20, when the eccentric bush 22 is used, the pin end 42 after eccentricity can be at different positions within the support bush 12, which is advantageous for eccentricity correction work and subsequent member adjustment work.

[0072] What has been described above is only an embodiment of the present invention, and thus does not limit the patent scope of the present invention. Any equivalent structure or equivalent flow conversion made using the content of the specification and drawings of the present invention, or any application directly or indirectly in other related technical fields, shall similarly be included in the scope of the claims for utility model registration.

Description of Reference Numerals

[0073] 1. Locking portion; 11. Locking sleeve; 12. Support bush; 13. Floating bush; 14. Elastic member; 15. Gasket; 16. Inclined groove; 17. Locking port; 2. Pin portion; 21. Pin sleeve; 22. Eccentric bush; 3. Adjusting portion; 31. Adjusting nut; 32. Key groove; 33. Cotter; 4. Pin head; 41. Threaded end; 42. Pin end; 43. Insertion rod; 44. Annular slot; 45. Guide head; 46. Shoot; 5. Fixed bracket; 51. Base; 52. Thrust groove; 53. Annular groove; 54. Rib; 55. Pressing frame; 56. Pressing ring; 57. Support tube; 58. Retaining ring; 59. Flange; 6. Locking member; 61. Rubber ring; 62. Arc-shaped ring block; 7. Connector.

Claims

1. A connection structure capable of automatically adjusting eccentricity, including a lock portion (1) and a pin portion (2) arranged on two members respectively. An adjustment portion (3) is provided between the lock portion (1) and the pin portion (2). The lock portion (1) includes a lock sleeve (11) opened towards the pin portion (2), a support bush (12) screwed on the open end of the lock sleeve (11), a floating bush (13) movably provided on the support bush (12), and a lock locking mechanism provided on the floating bush (13). The floating bush (13) is movable along the radial direction of the lock sleeve (11). The pin portion (2) includes a pin sleeve (21) and a pin head (4). The pin sleeve (21) is opened towards the lock portion (1). The pin head (4) includes a threaded end (41) screwed to the open end of the pin sleeve (21) and a pin end (42) fixed to the threaded end (41). An annular slot (44) is opened on the upper outer periphery of the pin end (42). After the pin end (42) protrudes upward from the support bush (12) and the floating bush (13), the annular slot (44) is fitted and fixed to the lock locking mechanism. The adjustment portion (3) is externally fitted on the pin end (42) and can control the insertion depth of the pin head (4) into the lock sleeve (11). Connectors (7) are respectively provided at the other end of the lock sleeve (11) and the other end of the pin sleeve (21). A connection structure capable of automatically adjusting eccentricity, characterized in that.

2. The locking mechanism includes a pressing frame (55) and a locking member (6). The inner circumference of the locking member (6) is externally fitted to the outer circumference of the annular slot (44). The lower part of the locking member (6) is housed in the upper part of the inner circumference of the floating bush (13). The pressing frame (55) includes a pressing ring (56), a support pipe (57), and a retaining ring (58). The pressing ring (56) is provided horizontally and is externally fitted above the outside of the annular slot (44). The pressing ring (56) is pressed by the locking member (6). The support pipe (57) is vertical and hollow, and is fixed to the upper end inside the pressing ring (56) and is located on the outer circumference of the pin end (42). The retaining ring (58) is vertical and hollow, and is fixed to the lower end outside the pressing ring (56) and is located outside the locking member (6) and above the floating bush (13). The connection structure capable of automatically adjusting eccentricity according to claim 1, characterized in that.

3. The locking member (6) includes a rubber ring (61) and a plurality of arc-shaped ring blocks (62). The inner circumference of the rubber ring (61) is externally fitted to the outer circumference of the annular slot (44). The lower part of the rubber ring (61) is housed in the upper part of the inner circumference of the floating bush (13). The rubber ring (61) has an annular structure with a hollow interior. The plurality of arc-shaped ring blocks (62) can form a complete annular structure by surrounding. The annular structure formed by the arc-shaped ring blocks (62) is housed inside the annular structure of the rubber ring (61). The connection structure capable of automatically adjusting eccentricity according to claim 2, characterized in that.

4. The pin end (42) includes an insertion rod (43), the annular slot (44), and a guide head (45). The insertion rod (43) is fixed to the upper end of the threaded end (41). The annular slot (44) is annularly provided on the outer peripheral wall at the tip of the insertion rod (43). The guide head (45) is fixed to the upper end of the annular slot (44) and has a frustum-shaped structure that becomes smaller from bottom to top. The connection structure capable of automatically adjusting eccentricity according to claim 1, characterized in that.

5. Further comprising an eccentric bush (22), the outer periphery of the eccentric bush (22) is screwed to the inside of the open end of the pin sleeve (21), and the threaded end (41) of the pin head (4) is screwed to the inner periphery of the eccentric bush (22), and the pin sleeve (21) is provided eccentrically, the automatically adjustable connection structure for eccentricity according to claim 1, characterized in that.

6. Further comprising an elastic member (14) externally fitted to the outer periphery of the support tube (57), with the upper end in close contact with the lower side of the inner end face of the lock sleeve (11) and the lower end in close contact with the upper end of the pressing ring (56), the automatically adjustable connection structure for eccentricity according to claim 2, characterized in that.

7. Further comprising a gasket (15) fixed to the lower side of the inner end face of the lock sleeve (11), with the upper end of the elastic member (14) in close contact with its lower end, the automatically adjustable connection structure for eccentricity according to claim 6, characterized in that.

8. The adjusting portion (3) includes an adjusting nut (31) and a cotter (33). A vertical and hollow through-hole for the pin head (4) to penetrate is opened in the middle of the adjusting nut (31). A vertical key groove (32) communicating with the through-hole is opened inside the adjusting nut (31). One side of the cotter (33) is engaged and fixed in the key groove (32). A vertical chute (46) is axially opened on the outer peripheral wall of the pin end (42). The upper end of the chute (46) communicates with the annular slot (44). The through-hole of the adjusting nut (31) is externally fitted to the outside of the pin end (42). The other side of the cotter (33) is slidable inside the chute (46), the automatically adjustable connection structure for eccentricity according to claim 1, characterized in that.

9. The elastic member (14) is a flexible rubber tube, the automatically adjustable connection structure for eccentricity according to claim 6, characterized in that.

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