Locking sleeve of bolt type mechanical connection joint

Abstract

The utility model discloses a locking sleeve of a bolt type mechanical connecting joint, which comprises a fixed base, an elastic connecting part and a split clamping block, the split clamping block is connected with the fixed base at the bottom through the elastic connecting part to form a hollow cylindrical structure, and the split clamping block comprises at least two independent clamping block single bodies to form the hollow cylindrical structure. The clamping block single bodies are respectively connected with the fixed base at the bottom through elastic connecting parts; a connecting clamping table is arranged at the bottom of the outer diameter of each clamping block single body; the outer diameter of each clamping block single body is provided with an outer conical surface, the outer conical surfaces are located above the connecting clamping tables, and the outer diameter of each connecting clamping table is larger than the maximum diameter of the bottom of the corresponding outer conical surface. The clamping block has the advantages that the connecting clamping table is arranged at the bottom of the outer diameter of the clamping block single body, so that semi-embedded type retaining connection between the packaging nut and the locking sleeve can be achieved, the locking sleeve is prevented from being separated from the packaging nut, the bending resistance is improved, and the installation efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to a core component of a connecting device for concrete piles, in particular to a locking sleeve of a pin - type mechanical connection joint, and belongs to the technical field of precast concrete production. Background Art

[0002] At present, in foundation engineering, precast piles are widely used and often in the form of multi - section piles. When splicing piles, the connection between the upper and lower section piles is mainly achieved by welding the end plates at the adjacent pile ends. This welding connection method not only requires high technical levels of construction workers, but is also greatly affected by external weather and the skill differences of on - site construction workers, easily resulting in large quality differences in the welding of piles. It is difficult to control the welding quality, thus leading to potential safety hazards in the connection structure at the pile head of precast piles. In some projects, in order to solve the quality hazards of on - site welding construction, mechanical connections are adopted, realizing the welding - free installation of precast piles on site, such as mechanical connection joints like pin - type mechanical connections.

[0003] However, in the prior art, the encapsulation nut of the pin - type mechanical connector is usually a simple cylindrical structure with an outward - expanding opening at the bottom of the inner diameter. During installation, the spring, locking sleeve, and encapsulation nut are installed in the lower sleeve one by one. The conical surface at the top of the locking sleeve contacts the opening at the bottom of the inner diameter of the encapsulation nut. After the insertion rod is inserted, the engaging surface of the locking sleeve is tightly clamped with the insertion rod. When the insertion rod bears a bending force, the conical surface at the top of the locking sleeve will tilt and even come out along with the conical surface of the opening at the bottom of the inner diameter of the encapsulation nut, causing the connection to fail. Such connection components are cumbersome to install and have weak bending resistance.

[0004] In addition, in the prior art, there is also a form in which the encapsulation nut, locking sleeve, and spring are pre - assembled into a whole in a packaged form and installed in the lower sleeve at one time. Although the on - site installation efficiency is improved, this form limits the size of the locking sleeve, making the structure of the locking sleeve that can be accommodated in the same - sized lower sleeve smaller, with weak anti - pulling and anti - bending forces.

[0005] Currently, the locking sleeve and the encapsulation nut are usually connected in a split - type contact manner, resulting in weak bending resistance of the connection components, easily causing the locking sleeve and the encapsulation nut to come out, resulting in connection failure; and the split - type structure will affect the installation efficiency. Summary of the Invention

[0006] Object of the Invention: The object of the utility model is to solve the problems existing in the prior art, and provide a locking sleeve of a pin - type mechanical connection joint, realizing a semi - embedded anti - retreat connection between the encapsulation nut and the locking sleeve, preventing the separation of the locking sleeve and the encapsulation nut, improving the bending resistance performance, and also improving the installation efficiency.

[0007] Technical solution: A locking sleeve for a plug-type mechanical connection joint, comprising a fixed base, an elastic connection part and split blocks. The split blocks are connected to the fixed base at the bottom through the elastic connection part to form a hollow cylindrical structure. The split blocks include at least two independent block monomers to form a hollow cylindrical structure, and the block monomers are respectively connected to the fixed base at the bottom through the elastic connection part; a connecting card table is provided at the bottom of the outer diameter of the block monomer; an outer conical surface is provided on the outer diameter of the block monomer, and the outer conical surface is located above the connecting card table, and the outer diameter of the connecting card table is greater than the maximum diameter of the bottom of the outer conical surface.

[0008] In the present utility model, the provision of the connecting card table at the bottom of the outer diameter of the block monomer can achieve a semi-embedded anti-withdrawal connection between the encapsulating nut and the locking sleeve, prevent the separation of the locking sleeve and the encapsulating nut, improve the bending resistance, and can improve the installation efficiency; when the outer conical surface is extruded, the split blocks achieve a better tightening effect, improving the connection quality and reliability of the locking sleeve; the outer diameter of the connecting card table is greater than the maximum diameter of the bottom of the outer conical surface, forming an upper limit structure with the encapsulating nut, which can accurately control the upward position of the locking sleeve, control the stroke of the entire locking sleeve, and avoid excessive upward stroke affecting the connection efficiency.

[0009] Preferred option, in order to form a semi-embedded anti-withdrawal connection structure between the encapsulating nut and the locking sleeve and enable relative movement, the outer diameter of the connecting card table is greater than the outer diameter of the elastic connection part. The connecting card table and the elastic connection part form a structure with a large top and a small root. When the split blocks are inserted into the encapsulating nut and the elastic connection part is placed outside the encapsulating nut and connected to the fixed base, the anti-pulling property of the connection joint can be increased, thereby improving the connection reliability.

[0010] Preferred option, in order to improve the connection reliability and installation convenience of the connection joint, a locking part is provided inside the diameter of the block monomer. Through the cooperation connection between the insertion rod and the locking part, the quick connection of the connection joint can be realized. When the block monomer is extruded and shrinks inward, the locking part can hold the outer diameter of the insertion rod, thereby improving the connection reliability.

[0011] Preferred option, in order to improve the adaptability of the connection joint, the locking part is composed of a number of annular anti-withdrawal grooves evenly distributed on the inner diameter of the split blocks. Through the provision of a number of annular anti-withdrawal grooves, the anti-withdrawal connection of various relative positions between the insertion rod and the locking part can be realized, improving the adaptability of the connecting piece.

[0012] Preferred option, in order to achieve the accurate and reliable connection of the connecting piece, the locking part is a single anti-withdrawal clamping surface. Through a single anti-withdrawal clamping surface, the relative position between the insertion rod and the locking sleeve can be accurately and reliably limited, and the area of the anti-withdrawal clamping surface can be increased to improve the connection reliability and stability.

[0013] Preferred option: To improve the adaptability of the connection joint and simultaneously enhance the accuracy and reliability of the connection, the locking portion is an internal thread structure. Through threaded connection, a non-retractable connection in various relative positions between the plug rod and the locking portion can be achieved, and at the same time, the accuracy and reliability of the connection can be improved.

[0014] Preferred option: To facilitate the installation of the fixed base and the spring, a connection hole is provided inside the fixed base, and the connection hole is in interference fit with the outer diameter of the spring. Through the interference fit, the pre-installation of the fixed base and the spring can be achieved, improving the assembly efficiency.

[0015] Preferred option: To improve the connection reliability between the fixed base and the spring, a protruding portion protruding inward is provided on the inner diameter of the connection hole, and the protruding portion is helically clamped with the outer diameter of the reduced-diameter portion at the top of the spring. The protruding portion on the inner diameter of the connection hole can increase the friction force between the connection hole and the outer diameter of the spring, thereby improving the connection reliability.

[0016] Beneficial effects: In the present utility model, a connection card table is provided at the bottom of the outer diameter of the single-piece clamping block, which can achieve a semi-embedded non-retractable connection between the encapsulation nut and the locking sleeve, prevent the separation of the locking sleeve and the encapsulation nut, improve the bending resistance performance, and can also improve the installation efficiency; the outer conical surface is extruded, and the split clamping block achieves a better tightening effect, improving the connection quality and reliability of the locking sleeve; the outer diameter of the connection card table is greater than the maximum diameter at the bottom of the outer conical surface, forming an upper limit structure with the encapsulation nut, which can accurately control the upward position degree of the locking sleeve, control the stroke of the entire locking sleeve, and avoid excessive upward stroke affecting the connection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to the provided drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of the assembled state of the present utility model;

[0019] Figure 2 It is a partial enlarged view of the assembled state of the present utility model;

[0020] Figure 3 It is a three-dimensional view of the present utility model;

[0021] Figure 4 It is a cross-sectional view of the first embodiment of the present utility model;

[0022] Figure 5 It is a cross-sectional view of the second embodiment of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all 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 protection scope of the present invention.

[0024] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0025] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely means that the horizontal height of the first feature is lower than that of the second feature.

[0026] As Figure 1 、 2 and shown in Figure 3, a locking sleeve of a plug-in mechanical connection joint includes a fixed base 1, an elastic connection part 2 and a split block 3. The split block 3 is connected to the fixed base 1 at the bottom through the elastic connection part 2 to form a hollow cylindrical structure. The split block 3 includes four independent block monomers 31 to form a hollow cylindrical structure. The block monomers 31 are respectively connected to the fixed base 1 at the bottom through the elastic connection part 2; a connection card table 4 is provided at the bottom of the outer diameter of the block monomer 31; an outer conical surface 5 is provided on the outer diameter of the block monomer 31. The outer conical surface 5 is located above the connection card table 4, and the outer diameter of the connection card table 4 is larger than the maximum diameter of the bottom of the outer conical surface 5.

[0027] The utility model provides a connecting clamping platform 4 at the bottom of the outer diameter of the clamping block monomer 31, which can realize a semi-embedded stop connection between the packaging nut and the locking sleeve, prevent the locking sleeve from separating from the packaging nut, improve the bending resistance, and improve the installation efficiency; the outer cone 5 is squeezed, and the split clamping block 3 achieves a better tightening effect, which improves the connection quality and reliability of the locking sleeve; the outer diameter of the connecting clamping platform 4 is larger than the maximum diameter of the bottom of the outer cone 5, and forms an upper limit structure with the packaging nut, which can accurately control the upward position of the locking sleeve, control the stroke of the entire locking sleeve, and avoid excessive upward stroke affecting the connection efficiency.

[0028] like Figure 2 and 3 As shown, in order to form a semi-embedded stop connection structure between the encapsulated nut and the locking sleeve and enable relative movement, the outer diameter of the connecting clamp 4 is larger than the outer diameter of the elastic connecting part 2. The connecting clamp 4 and the elastic connecting part 2 form a structure with a large top and a small root. The split clamp 3 is inserted into the encapsulated nut while the elastic connecting part 2 is placed outside the encapsulated nut and connected to the fixed base 1, which can increase the pull-out resistance of the connection joint and thus improve the connection reliability.

[0029] like Figure 3 As shown, in order to improve the connection reliability and installation convenience of the connection joint, the inner diameter of the block monomer 31 is provided with a locking portion 6. The fast connection of the connection joint can be achieved through the matching connection between the plug rod and the locking portion 6. The block monomer 31 is squeezed and contracted inwardly, so that the locking portion 6 can hold the outer diameter of the plug rod, thereby improving the reliability of the connection. Embodiment 1

[0030] like Figure 4 As shown, in order to improve the adaptability of the connection joint, the locking portion 6 is composed of a plurality of annular stop grooves 61 evenly distributed on the inner diameter of the split block 3. The arrangement of a plurality of annular stop grooves 61 can realize the stop connection of the plug rod and the locking portion 6 at various relative positions, thereby improving the adaptability of the connector. Embodiment 2

[0031] like Figure 5 As shown, in order to achieve accurate and reliable connection of the connector, the locking portion 6 is a stopper interface 62. The stopper interface 62 can accurately and reliably limit the relative position of the plug rod and the locking sleeve, and the area of ​​the stopper interface 62 can be increased to improve the reliability and stability of the connection. Embodiment 3

[0032] No drawings are provided, in order to improve the adaptability of the connection joint and improve the accuracy and reliability of the connection, the locking portion 6 is an internal thread structure. The threaded connection can realize the non-retractable connection between the plug rod and the locking portion 6 at various relative positions, and can also improve the accuracy and reliability of the connection. Embodiment 4

[0033] To facilitate the installation of the fixed base 1 and the spring, a connection hole 7 is provided inside the fixed base 1, and the connection hole 7 is in interference fit with the outer diameter of the spring. The interference fit can realize the pre-installation of the fixed base 1 and the spring, improving the assembly efficiency. Embodiment Five

[0034] As Figure 4 and 5 shown, to improve the connection reliability between the fixed base 1 and the spring, a protruding portion 8 protruding inward is provided on the inner diameter of the connection hole 7, and the protruding portion 8 is in spiral engagement with the outer diameter of the reduced-diameter portion at the top of the spring. The protruding portion 8 on the inner diameter of the connection hole 7 can increase the friction between the connection hole 7 and the outer diameter of the spring, thereby improving the connection reliability.

[0035] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For the relevant parts, reference can be made to the description in the method part.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A locking sleeve of a bolt-type mechanical connection joint, comprising a fixed base (1), an elastic connection portion (2) and a split clamping block (3), wherein the split clamping block (3) is connected to the fixed base (1) at the bottom through the elastic connection portion (2) to form a hollow cylindrical structure, characterized in that: The split card block (3) comprises at least two mutually independent card block monomers (31) forming a hollow cylindrical structure, wherein the card block monomers (31) are respectively connected to a fixed base (1) at the bottom via elastic connecting parts (2); a connecting card platform (4) is provided at the bottom of the outer diameter of the card block monomer (31); an outer conical surface (5) is provided at the outer diameter of the card block monomer (31), the outer conical surface (5) is located above the connecting card platform (4), and the outer diameter of the connecting card platform (4) is greater than the maximum diameter of the bottom of the outer conical surface (5).

2. The locking sleeve of the latch-type mechanical connection joint according to claim 1, characterized in that: The outer diameter of the connecting clamp (4) is greater than the outer diameter of the elastic connecting part (2).

3. The locking sleeve of the latch-type mechanical connection joint according to claim 1 or 2, characterized in that: The inner diameter of the block monomer (31) is provided with a locking portion (6).

4. The locking sleeve of the latch-type mechanical connection joint according to claim 3, characterized in that: The locking portion (6) is composed of a plurality of annular stop grooves (61) evenly distributed on the inner diameter of the split clamping block (3).

5. The locking sleeve of the latch-type mechanical connection joint according to claim 3, characterized in that: The locking portion (6) is a stop-retraction clamping surface (62).

6. The locking sleeve of the latch-type mechanical connection joint according to claim 3, characterized in that: The locking portion (6) is an internal thread structure.

7. The locking sleeve of the latch-type mechanical connection joint according to claim 1, characterized in that: A connecting hole (7) is provided inside the fixed base (1), and the connecting hole (7) is interference-fitted with the outer diameter of the spring.

8. The locking sleeve of the latch-type mechanical connection joint according to claim 7, characterized in that: The inner diameter of the connection hole (7) is provided with a protruding portion (8) protruding inwardly, and the protruding portion (8) is spirally clamped with the outer diameter of the reduced diameter portion at the top of the spring.

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