Quick-connection pin type mechanical connector

Abstract

A pin type mechanical connector for quick connection comprises two end plates arranged at the opposite ends of two pile bodies respectively, at least two open grooves distributed in the circumferential direction are formed in the peripheral wall of each end plate, the open grooves penetrate to the side, opposite to the other end plate, of the corresponding end plate, and the positions of the open grooves in the two end plates correspond one by one; the connecting pins are used for being inserted into the two corresponding open grooves, clamping bolts arranged in the inserting direction of the connecting pins are arranged at the ends, close to the center of the end plate, of the open grooves, and clamping grooves corresponding to the clamping bolts are formed in one ends of the connecting pins; the clamping bolts are used for being inserted into the corresponding clamping grooves and opening the connecting pins so that the connecting pins can be fixed to the two corresponding open grooves. According to the scheme, convenient insertion and assembly of the connecting pins relative to the open grooves are achieved, meanwhile, the connecting pins are gradually expanded in the insertion process through cooperation of the clamping bolts and the clamping grooves, fastening of the connecting pins and the two corresponding open grooves is achieved, and the shaking problem is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of pile joint structures, in particular to a fast-connected pin-type mechanical joint. Background Art

[0002] At present, the most common form of connection between precast piles is welding connection. However, the on-site welding construction process is greatly affected by human factors and weather factors, and the construction quality control is difficult. The quality management of the connection between piles is not in place during the construction process, which affects the pull-out quality of the precast piles used as pull-out piles.

[0003] A precast pile mechanical connection structure (CN204626392U), a precast pile mechanical connection structure and its connection method (CN104790388B), a precast pile mechanical connection structure, including end plate bodies and connecting pins and positioning pins arranged at both ends of the precast pile, an "eight"-shaped groove is arranged on the outer edge of the end plate body, and the "eight"-shaped grooves on adjacent end plate bodies are matched to form a waist-shaped groove of an "8"-shaped structure, and at least two positioning holes are arranged on the pile connection surface of the end plate body. The following problems exist in the construction process of this precast pile mechanical connection structure:

[0004] (1) The above-mentioned positioning pins are set with equal diameters and lengths, the positioning holes are located inside the countersunk holes of the prestressed steel bars, and the positioning pins are solid metal components, which leads to:

[0005] ① Since the length of the locating pin is short and the locating hole is located on the inner side of the countersunk hole of the prestressed steel bar and is far away from the outer edge of the end plate, during the connection of the upper and lower piles, the line of sight of the locating pin is blocked by the upper pile and cannot be quickly and accurately positioned, and it is difficult to fine-tune the pin.

[0006] ② Since the positioning pins are of equal length, all the positioning holes need to be aligned during the pile connection process and the positioning pins need to be inserted at the same time. However, in the actual construction process, the upper pile is suspended above the lower pile and is prone to shaking. It is difficult to align the positioning holes at the same time. The above-mentioned positioning pin structure affects the construction efficiency.

[0007] (2) The connecting pin and the "eight"-shaped groove arranged along the outer edge of the end plate body are arranged in the same cross-sectional form along the depth direction, which results in that if the size of the connecting pin is exactly the same as the size of the "eight"-shaped groove, the connecting pin is difficult to insert during the actual construction process; for the convenience of construction, the conventional practice is to design the size of the connecting pin to have a certain negative deviation, or to design the width of the connecting pin to be a tapered structure that gradually decreases along the depth direction, but a large gap will be generated between the connecting pin with a negative deviation size or a tapered structure and the "eight"-shaped groove, resulting in the connecting pin shaking and other problems, affecting the use effect of the mechanical connection structure. Utility Model Content

[0008] The purpose of the utility model is to at least solve the problem that during actual construction, the connecting pin and the "eight"-shaped groove in the prior art are difficult to insert if the sizes are the same, and if there is a negative deviation in the size or the connecting pin is conical, it will easily shake due to excessive gap, thereby affecting the stability of the connection between the end plates.

[0009] In order to solve the above problems, the utility model provides a quick-connect pin-type mechanical joint, including two end plates respectively arranged at the opposite ends of the two pile bodies, the outer peripheral wall of each end plate is provided with at least two grooves distributed along the circumferential direction, the grooves penetrate to the side of each end plate opposite to the other end plate, and the positions of the grooves on the two end plates correspond one by one; it also includes a connecting pin for being inserted into the corresponding two grooves, the end of the groove close to the center of the end plate is provided with a bolt arranged along the insertion direction of the connecting pin, and one end of the connecting pin is provided with a slot corresponding to the bolt, and the bolt is used to insert the corresponding slot and spread the connecting pin along the width direction to achieve the fixation of the connecting pin and the corresponding two slots.

[0010] Compared with the prior art, in the above scheme, the width of the connecting pin can be designed to be smaller than the width of the slot to facilitate insertion. At the same time, a latch is added in the slot and a slot is set at one end of the connecting pin. As the connecting pin is inserted into the slot, the latch is gradually inserted into the slot and pushes the connecting pin to expand along the width direction, so that the two sides of the connecting pin are abutted and fixed against the groove walls of the two slots, thereby achieving the fastening of the connecting pin and the corresponding two slots, avoiding the shaking problem and effectively improving the connection stability of the two end plates.

[0011] As a preferred solution, the distal ends of the two corresponding slots are provided with a limiting groove with increased width, and the side wall in the width direction of the connecting pin is provided with a limiting protrusion for plugging into the limiting groove, so that the connecting pin fixes the two corresponding slots through the cooperation between the limiting protrusion and the limiting groove, thereby effectively improving the tensile strength.

[0012] As a preferred solution, the widths of the two corresponding slotted limit grooves gradually increase in the direction away from each other, so that the groove walls in the width direction of the limit groove form a slope or an arc surface, and the shape of the limit protrusion matches the shape of the limit groove, so that the limit groove and the limit protrusion have a larger contact area, further improving the tensile strength.

[0013] As a preferred solution, the width of the slot gradually decreases in the direction approaching the center of the end plate or the width of the bolt gradually increases in the direction approaching the center of the end plate, so that as the insertion depth of the connecting pin increases, the bolt can gradually expand the end of the connecting pin with the slot in the width direction.

[0014] As a preferred solution, the width of the end of the connecting pin close to the slot is smaller than the width of the end away from the slot, and when the bolt is inserted into the slot, the side wall of the connecting pin in the width direction at the slot is tightly abutted against the slot, thereby facilitating the insertion of the connecting pin relative to the slot on the one hand, and ensuring the tightness of the connection between the end of the connecting pin away from the slot and the slot on the other hand. Further, the width of the slot gradually decreases in the direction close to the center of the end plate or the width of the bolt gradually increases in the direction close to the center of the end plate.

[0015] As a preferred solution, the width of the connecting pin at the end close to the slot is smaller than the width at the end away from the slot, thereby facilitating the insertion of the connecting pin into the slot and ensuring the tightness of the connection between the end of the connecting pin away from the slot and the slot.

[0016] As a preferred solution, multiple positioning holes are provided on the opposite sides of the two end plates and the positions of the positioning holes of the two end plates correspond to each other. A positioning pin is inserted between the two corresponding positioning holes, so that the pre-positioning between the two end plates can be assisted by inserting the positioning pin into the corresponding positioning hole, which facilitates the subsequent assembly of the connecting pins and the corresponding slots.

[0017] As a preferred embodiment, there are three positioning holes on each end plate, and the first positioning hole, the second positioning hole and the third positioning hole are distributed circumferentially on the end plate, and the aperture of the third positioning hole is larger than the second positioning hole; there are three positioning pins, which are the first positioning pin, the second positioning pin and the third positioning pin, respectively, and the two ends of the first positioning pin are respectively inserted into the first positioning holes of the two end plates, and the diameters of the second positioning pin and the third positioning pin respectively correspond to the second positioning holes and the third positioning holes. The second positioning pin and the third positioning pin both include a pin barrel and a pin cap, one end of the pin barrel is provided with an opening for the pin cap to slide with, and the pin barrel is provided with a spring that abuts against the pin cap to realize elastic expansion and contraction of the pin cap relative to the pin barrel opening, and the pin barrels of the second positioning pin and the third positioning pin are both used to be inserted into the second positioning hole and the third positioning hole of the same end plate, and the pin caps of the second positioning pin and the third positioning pin are both used to be inserted into the second positioning hole and the third positioning hole of the other end plate, thereby achieving a more convenient and accurate positioning effect of the two end plates.

[0018] As a preferred solution, the length of the first locating pin is greater than the lengths of the second locating pin and the third locating pin, so that during the connection of the end plates of the two pile bodies, the first locating pin can be first inserted into the first locating holes of the two end plates, and then the second locating pin and the third locating pin are aligned and connected relative to the second locating hole and the third locating hole respectively, thereby further reducing the construction difficulty. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a quick-connect pin-type mechanical joint when two end plates are staggered;

[0020] Figure 2 A schematic diagram of two end plates of a quick-connect pin-type mechanical joint when aligned;

[0021] Figure 3 A schematic diagram of an end plate of a lower pile body of a quick-connect pin-type mechanical joint;

[0022] Figure 4 A schematic structural diagram of a slotted end plate of a lower pile body of a quick-connect pin-type mechanical joint;

[0023] Figure 5 A schematic diagram of a connecting pin of a quick-connect pin-type mechanical joint;

[0024] Figure 6 A schematic diagram of a first positioning pin of a quick-connect pin-type mechanical joint;

[0025] Figure 7 A schematic diagram of a second locating pin of a quick-connect pin-type mechanical joint;

[0026] Figure 8 A schematic cross-sectional view of a second locating pin of a quick-connect pin-type mechanical joint;

[0027] Fig. 9 A schematic cross-sectional view of a third locating pin of a quick-connect pin-type mechanical joint.

[0028] Description of reference numerals:

[0029] 1. End plate; 11. Slot; 111. Limiting groove; 12. Bolt; 13. Positioning hole; 13a. First positioning hole; 13b. Second positioning hole; 13c. Third positioning hole; 2. Connecting pin; 21. Slot; 22. Limiting protrusion; 3. Positioning pin; 31. Pin barrel; 32. Pin cap; 33. Spring; 3a. First positioning pin; 3b. Second positioning pin; 3c. Third positioning pin. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. It should also be noted that all directional indications in the embodiments of the utility model (such as up, down, left, right, front, back, inside, outside) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] See also Figure 1-Figure 5 , an embodiment of the utility model provides a quick-connect pin-type mechanical joint, comprising two end plates 1 respectively arranged at opposite ends of two pile bodies, the outer peripheral wall of each end plate 1 is provided with at least two circumferentially distributed grooves 11, the grooves 11 penetrate to the side of each end plate 1 opposite to the other end plate 1, and the positions of the grooves 11 on the two end plates 1 correspond one by one; it also includes a connecting pin 2 for being inserted into the corresponding two grooves 11, one end of the groove 11 close to the center of the end plate 1 is provided with a bolt 12 arranged along the insertion direction of the connecting pin 2, and one end of the connecting pin 2 is provided with a groove 21 corresponding to the bolt 12, the bolt 12 is used to be inserted into the corresponding groove 21 and to open the connecting pin 2 along the width direction to achieve the fixation of the connecting pin 2 and the corresponding two grooves 11.

[0032] In the above scheme, on the one hand, the width of the connecting pin 2 can be designed to be smaller than the width of the slot 11 for easy insertion. On the other hand, by adding a bolt 12 in the slot 11 and setting a slot 21 at one end of the connecting pin 2, as the connecting pin 2 is inserted into the slot 11, the bolt 12 is gradually inserted into the slot 21 and pushes the connecting pin 2 to expand along the width direction, so that the two sides of the connecting pin 2 are abutted and fixed to the slot walls of the two slots 11, and finally the connecting pin 2 is fastened to the corresponding two slots 11, avoiding the shaking problem and effectively improving the connection stability of the two end plates 1.

[0033] For a clearer explanation, Figure 1As shown, in this embodiment, the two pile bodies are arranged up and down, and the lower end of the upper pile body and the upper end of the lower pile body are provided with a transverse end plate 1; the shape of the end plate 1 is not limited, and can be circular, square or polygonal, and is circular in this embodiment; the outer peripheral wall of each end plate 1 is provided with a plurality of grooves 11 distributed along the circumferential direction, and the grooves 11 extend toward the center of the end plate 1 along the radial direction of the end plate 1, wherein the grooves 11 of the end plate 1 of the upper pile body penetrate to the lower side surface of the end plate 1, and the grooves 11 of the end plate 1 of the lower pile body penetrate to the upper side surface of the end plate 1; the bolt 12 is arranged at one end of the groove 11 close to the center of the end plate 1, and the long side of the bolt 12 is arranged along the radial direction of the end plate 1; it should be noted that the length direction of the groove 11 or the bolt 12 referred to in this embodiment refers to the direction parallel to the radial direction of the end plate 1, and the width direction of the groove 11 or the bolt 12 refers to the direction perpendicular to the radial direction of the end plate 1.

[0034] As an improvement to this embodiment, the width of the slot 21 gradually decreases in the direction approaching the center of the end plate 1 or the width of the bolt 12 gradually increases in the direction approaching the center of the end plate 1, so that as the insertion depth of the connecting pin 2 increases, the bolt 12 can gradually expand the end of the connecting pin 2 provided with the slot 21 in the width direction.

[0035] As an improvement to this embodiment, the distal ends of the two corresponding slots 11 are provided with a limiting groove 111 with an increased width, and the upper and lower parts of the side walls in the width direction of the connecting pin 2 are respectively provided with limiting protrusions 22 for being inserted into the limiting grooves 111, so that the connecting pin 2 fixes the two corresponding slots 11 through the cooperation between the limiting protrusions 22 and the limiting grooves 111, thereby effectively improving the tensile strength.

[0036] Furthermore, the widths of the limiting grooves 111 of the two corresponding grooves 11 gradually increase in the direction away from each other, so that the groove walls in the width direction of the limiting grooves 111 form a slope or an arc surface, and the shape of the limiting protrusion 22 matches the shape of the limiting grooves 111, so that the limiting grooves 111 and the limiting protrusions 22 have a larger contact surface, further improving the tensile strength.

[0037] Furthermore, the width of the end of the connecting pin 2 close to the slot 21 is smaller than the width of the end away from the slot 21, and when the bolt 12 is inserted into the slot 21, the side wall of the connecting pin 2 in the width direction at the slot 21 is tightly abutted against the slot 11, thereby facilitating the insertion of the connecting pin 2 relative to the slot 11 on the one hand, and ensuring the tightness of the connection between the end of the connecting pin 2 away from the slot 21 and the slot 11 on the other hand. At the same time, since the width of the slot 21 gradually decreases in the direction close to the center of the end plate 1 or the width of the bolt 12 gradually increases in the direction close to the center of the end plate 1, the end of the connecting pin 2 with the slot 21 is gradually stretched in the width direction, which is more conducive to construction.

[0038] As another improvement to the present embodiment, a plurality of positioning holes 13 are provided on opposite sides of the two end plates 1 and the positions of the positioning holes 13 of the two end plates 1 correspond to each other, and a positioning pin 3 is inserted between two corresponding positioning holes 13, so that the pre-positioning between the two end plates 1 can be assisted by inserting the positioning pin 3 into the corresponding positioning hole 13, thereby facilitating the subsequent assembly of the connecting pin 2 and the corresponding slot 11.

[0039] More specifically, combined Figure 6-Figure 9 In this embodiment, there are three positioning holes 13 on each end plate 1, and the first positioning hole 13a, the second positioning hole 13b and the third positioning hole 13c are distributed on the end plate 1 along the circumferential direction. The first positioning hole 13a, the second positioning hole 13b and the third positioning hole 13c are arranged in a clockwise direction in sequence, and the aperture of the third positioning hole 13c is larger than the second positioning hole 13b; there are three positioning pins 3, which are the first positioning pin 3a, the second positioning pin 3b and the third positioning pin 3c, respectively. The first positioning pin 3a is a solid metal shaft, and the two ends of the first positioning pin 3a are respectively inserted into the first positioning holes 13a of the two end plates 1, and the diameters of the second positioning pin 3b and the third positioning pin 3c are respectively The diameters correspond to the second positioning hole 13b and the third positioning hole 13c respectively. The second positioning pin 3b and the third positioning pin 3c both include a pin barrel 31 and a pin cap 32. One end of the pin barrel 31 is provided with an opening for the pin cap 32 to slide with. A spring 33 is provided in the pin barrel 31 to abut against the pin cap 32 to achieve elastic expansion and contraction of the pin cap 32 relative to the opening of the pin barrel 31. The pin barrels 31 of the second positioning pin 3b and the third positioning pin 3c are both used to be plugged into the second positioning hole 13b and the third positioning hole 13c of the same end plate 1. The pin caps 32 of the second positioning pin 3b and the third positioning pin 3c are both used to be plugged into the second positioning hole 13b and the third positioning hole 13c of the other end plate 1.

[0040] During the docking construction of two pile bodies, the lower pile body is first placed, and the lower end of the first locating pin 3a is inserted into the first locating hole 13a of the end plate 1 of the lower pile body, and the pin barrel 31 of the second locating pin 3b and the third locating pin 3c is inserted into the second locating hole 13b and the third locating hole 13c of the end plate 1 of the lower pile body. At this time, the upper end of the first locating pin 3a, the cap of the second locating pin 3b and the cap of the third locating pin 3c all protrude from the upper side of the end plate 1 of the lower pile body. Then, the upper pile body is lifted to the lower pile body, and the position of the end plate 1 of the upper pile body is adjusted so that the upper end of the first locating pin 3a is inserted into the first locating hole 13a of the end plate 1 of the upper pile body. Then, the upper pile body is rotated counterclockwise with the first locating pin 3a as the axis until The second positioning hole 13b and the third positioning hole 13c of the end plate 1 of the upper pile body are respectively connected with the second positioning pin 3b and the third positioning pin 3c. At this time, the pre-positioning between the two end plates 1 is completed, that is, the corresponding slots 11 of the two end plates 1 are aligned with each other, and the connecting pin 2 can be assembled subsequently; in addition, it should be noted that in the process of the upper pile body rotating counterclockwise around the first positioning pin 3a, the second positioning pin 3b and the third positioning pin 3c are both in a compressed state after contacting the end plate 1 of the upper pile body. As the upper pile body continues to rotate, the third positioning pin 3c will first contact the second positioning hole 13b of the end plate 1 of the upper pile body. Since the diameter of the second positioning hole 13b is smaller than that of the third positioning pin 3c, the pin cap of the third positioning pin 3c

[0041] 32 will not bounce up, so that the end plate 1 of the upper pile body can continue to rotate until the third locating pin 3c is aligned with the third locating hole 13c of the upper pile body and the second locating pin 3b is aligned with the second locating hole 13b of the upper pile body. The pin caps 32 of the third locating pin 3c and the second locating pin 3b will bounce up under the action of the spring 33, thereby realizing the connection and fixation of the second locating pin 3b to the second locating hole 13b of the two end plates 1 and the third locating pin 3c to the third locating hole 13c of the two end plates 1.

[0042] Furthermore, the length of the first positioning pin 3a is greater than the length of the second positioning pin 3b and the third positioning pin 3c, so that when the end plates 1 of the two pile bodies are connected, the first positioning pin 3a can be inserted into the first positioning holes 13a of the two end plates 1 first, and then the second positioning pin 3b and the third positioning pin 3c are aligned and connected relative to the second positioning hole 13b and the third positioning hole 13c respectively, thereby further reducing the construction difficulty.

[0043] Although the disclosure is as above, the protection scope of the disclosure is not limited thereto. For those skilled in the art, various changes and modifications can be made without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A quick-connect pin-type mechanical joint, comprising two end plates (1) respectively arranged at opposite ends of two pile bodies, the outer peripheral wall of each end plate (1) is provided with at least two circumferentially distributed grooves (11), the grooves (11) penetrate to the side of each end plate (1) opposite to the other end plate (1), and the positions of the grooves (11) on the two end plates (1) correspond to each other, characterized in that: It also includes a connecting pin (2) for being inserted into two corresponding slots (11); one end of the slot (11) close to the center of the end plate (1) is provided with a latch (12) arranged along the insertion direction of the connecting pin (2); one end of the connecting pin (2) is provided with a latch groove (21) corresponding to the latch groove (12); the latch groove (12) is used to insert into the corresponding latch groove (21) and to stretch the connecting pin (2) in the width direction to achieve the fixing of the connecting pin (2) and the two corresponding slots (11).

2. A quick-connect pin-type mechanical joint according to claim 1, characterized in that: The distal ends of the two corresponding slots (11) are provided with a limiting groove (111) with an increased width, and the side wall of the connecting pin (2) in the width direction is provided with a limiting protrusion (22) for being inserted into the limiting groove (111).

3. A quick-connect pin-type mechanical joint according to claim 2, characterized in that: The widths of the limiting grooves (111) of the two corresponding slots (11) gradually increase in a direction away from each other, so that the groove walls of the limiting grooves (111) in the width direction form an inclined surface or an arc surface, and the shape of the limiting protrusion (22) matches the shape of the limiting groove (111).

4. A quick-connect pin-type mechanical joint according to any one of claims 1 to 3, characterized in that: The width of the clamping slot (21) gradually decreases in a direction approaching the center of the end plate (1), or the width of the clamping bolt (12) gradually increases in a direction approaching the center of the end plate (1).

5. A quick-connect pin-type mechanical joint according to any one of claims 1 to 3, characterized in that: The width of the connecting pin (2) at one end close to the card slot (21) is smaller than the width of the end away from the card slot (21), and when the latch (12) is inserted into the card slot (21), the side wall of the connecting pin (2) at the card slot (21) in the width direction is tightly in contact with the slot (11).

6. A quick-connect pin-type mechanical joint according to claim 5, characterized in that: The width of the clamping slot (21) gradually decreases in a direction approaching the center of the end plate (1), or the width of the clamping bolt (12) gradually increases in a direction approaching the center of the end plate (1).

7. A quick-connect pin-type mechanical joint according to claim 1, characterized in that: A plurality of positioning holes (13) are provided on opposite sides of the two end plates (1), and the positions of the positioning holes (13) of the two end plates (1) correspond to each other, and a positioning pin (3) is inserted between two corresponding positioning holes (13).

8. A quick-connect pin-type mechanical joint according to claim 7, characterized in that: There are three positioning holes (13) on each end plate (1), and the first positioning hole (13a), the second positioning hole (13b) and the third positioning hole (13c) are distributed on the end plate (1) along the circumferential direction, wherein the diameter of the third positioning hole (13c) is larger than that of the second positioning hole (13b); there are three positioning pins (3), namely the first positioning pin (3a), the second positioning pin (3b) and the third positioning pin (3c), the two ends of the first positioning pin (3a) are respectively inserted into the first positioning holes (13a) of the two end plates (1), the diameters of the second positioning pin (3b) and the third positioning pin (3c) respectively correspond to the second positioning holes (13b) and the third positioning holes (13c), and the second positioning pin ( The first and second positioning pins (3b) and the third positioning pin (3c) both comprise a pin barrel (31) and a pin cap (32); one end of the pin barrel (31) is provided with an opening for the pin cap (32) to slide with; a spring (33) is provided in the pin barrel (31) and abuts against the pin cap (32) to realize elastic expansion and contraction of the pin cap (32) relative to the opening of the pin barrel (31); the pin barrels (31) of the second and third positioning pins (3b) and the third positioning pin (3c) are both used for plugging into the second and third positioning holes (13b) and (13c) of the same end plate (1); the pin caps (32) of the second and third positioning pins (3b) and the third positioning pins (3c) are both used for plugging into the second and third positioning holes (13b) and (13c) of the other end plate (1).

9. A quick-connect pin-type mechanical joint according to claim 8, characterized in that: The length of the first positioning pin (3a) is greater than the lengths of the second positioning pin (3b) and the third positioning pin (3c).

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