A locking pin structure

Abstract

The application relates to a locking pin structure which comprises a pin shaft, an elastic pin, a gantry mounting frame and a locking block, the tail end of the pin shaft is provided with a through hole, the elastic pin is in a U-shaped structure and comprises a first rod piece, a bending section and a second rod piece which are sequentially connected, the first rod piece passes through the through hole, the gantry mounting frame is provided with a first shaft hole, the locking block is arranged on the front surface of the gantry mounting frame, and a limiting groove is formed between the locking block and the gantry mounting frame; the front end of the pin shaft is exposed after passing through the first shaft hole from the front surface of the gantry mounting frame, the first rod piece moves in the through hole, and the second rod piece is connected with the limiting groove. Compared with the prior art, the pin shaft is locked and fixed through the mutual embedding of the elastic pin and the locking block, the structure is simple, the operation is convenient, and the locking pin structure is suitable for the connection of a gantry clamp.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of mechanical equipment, in particular to a locking pin structure. BACKGROUND

[0002] In the production and manufacturing process of offshore platforms, different fixtures need to be replaced for different workpieces during production operation. The fixture is connected with the fixture rack of the portal frame through a pin shaft. The pin shaft is a key component for fixing the fixture, and cannot be loosened or detached during production, otherwise it will cause safety accidents. Therefore, the connecting pin shaft needs to be locked.

[0003] The anti-loosening locking form of the pin shaft is various. The general pin shaft locking structure includes bolt fixation, split pin locking, and circlip, etc. These locking forms have problems such as more or less troublesome operation, single direction locking, high cost, etc., which are not suitable for the application of portal frame fixture connection. Therefore, the market urgently needs to design a special self-locking pin shaft structure for the portal frame system of offshore platforms. SUMMARY

[0004] The purpose of the present application is to overcome the defects of the prior art and provide a locking pin structure.

[0005] The purpose of the present application can be achieved by the following technical solutions:

[0006] A locking pin structure, comprising a pin shaft, an elastic pin, a portal frame mounting rack, and a locking block, wherein the tail end of the pin shaft is provided with a through hole, the elastic pin is a U-shaped structure comprising a first rod, a bending section, and a second rod connected in sequence, the first rod passes through the through hole, the portal frame mounting rack is provided with a first shaft hole, the locking block is arranged on the front surface of the portal frame mounting rack, and a limiting groove is formed between the locking block and the portal frame mounting rack.

[0007] The front end of the pin shaft is exposed after passing through the first shaft hole from the front surface of the portal frame mounting rack, and the first rod moves in the through hole to make the second rod connect the limiting groove.

[0008] In another preferred example, one end of the first rod is provided with a limiting piece, so that the first rod cannot be detached from the through hole.

[0009] In another preferred example, the limiting piece is a bending part at the end of the first rod.

[0010] In another preferred example, the depth of the limiting groove is 1 / 3-2 / 3 of the diameter of the second rod.

[0011] In another preferred example, the tail end of the pin shaft is provided with an annular groove, the through hole is arranged in the annular groove, the limiting groove is close to the first shaft hole, when the pin shaft is inserted into the first shaft hole, the limiting groove and the annular groove form a groove hole structure for passing through the second rod.

[0012] In another preferred example, the depth of the annular groove is 1 / 3-2 / 3 of the diameter of the second rod.

[0013] In another preferred example, the length of the first rod is greater than the length of the second rod.

[0014] In another preferred example, two lock pin mechanisms are arranged back to back, the exposed end of the pin shaft after passing through the first shaft hole in each lock pin mechanism is a connecting end, and the two symmetrical connecting ends are used to simultaneously connect external equipment.

[0015] In another preferred example, the external equipment is provided with an assembly end, the assembly end includes two assembly plates, each assembly plate is provided with a mounting hole, and the connecting end of the pin shaft is connected to the mounting hole.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] 1. The first shaft hole and the locking block are arranged on the gantry mounting frame, and the elastic pin with a U-shaped structure is arranged at the tail end of the pin shaft, so that the pin shaft is locked and fixed through the mutual embedding of the elastic pin and the locking block after the pin shaft is inserted into the first shaft hole, the structure is simple, the operation is convenient, and the present application is suitable for the connection of the gantry clamp.

[0018] 2. The limiting piece is arranged on the first rod, so that the elastic pin can be fixed on the pin shaft at all times, and the elastic pin is prevented from falling off.

[0019] 3. The annular groove is arranged at the tail end of the pin shaft, the annular groove and the limiting groove of the locking block form a groove hole structure to fix the second rod, so that the second rod can simultaneously limit the forward and backward movement and rotation of the pin shaft, and the groove hole structure also limits the movement of the second rod, so that the locked structure is more stable.

[0020] 4. The two lock pin mechanisms are arranged back to back and cooperated, so that the gantry and the external equipment can be effectively connected, after the pin shaft is loosened, the external equipment is separated from the gantry, after a new external equipment is replaced, the pin shaft is reinstalled and locked, the external equipment is connected with the gantry, the whole process is simple and fast, and the locking is safe and reliable during work. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic view of the first embodiment of the present application.

[0022] Figure 2State diagram for the use process of embodiment one of the present application.

[0023] Figure 3 State diagram for the use process two of embodiment one of the present application.

[0024] Figure 4 Structure diagram of embodiment two of the present application.

[0025] Figure 5 A-A sectional view in Figure 4

[0026] Figure 6 B-B sectional view in Figure 5

[0027] Reference signs: 1, pin shaft, 11, through hole, 12, annular groove, 13, connecting end, 2, elastic pin, 21, first rod, 22, second rod, 23, bending section, 3, gantry mounting frame, 31, first shaft hole, 4, locking block, 5, limiting groove, 6, limiting piece, 7, external device, 71, assembly plate, 72, mounting hole. DETAILED DESCRIPTION

[0028] The present application will be described in detail below with reference to the drawings and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present application, and gives a detailed implementation manner and specific operation process, but the protection scope of the present application is not limited to the following embodiments.

[0029] Embodiment one

[0030] As shown in Figure 1 , the present embodiment provides a lock pin structure, which comprises a pin shaft 1, an elastic pin 2, a gantry mounting frame 3 and a locking block 4, and can effectively connect the gantry and the clamp. The tail end of the pin shaft 1 is provided with a through hole 11 for passing through the elastic pin 2. The elastic pin 2 is a U-shaped mechanism, specifically comprising a first rod 21, a bending section 23 and a second rod 22 connected in sequence, the length of the first rod 21 is greater than the length of the second rod 22, and the first rod 21 passes through the through hole 11 and can freely slide in the through hole 11. A limiting piece 6 is arranged at the bottom of the first rod 21, so that the first rod 21 cannot be pulled out of the through hole 11, that is, so that the elastic pin 2 is always connected to the pin shaft 1. The limiting piece 6 can adopt a conventional nut structure, and the specific structure is not limited, and in the present embodiment, a bending structure is preferably adopted, that is, the lower end of the first rod 21 is bent forward to form a bending part. The gantry mounting frame 3 is provided with a first shaft hole 31 and a locking block 4, the locking block 4 is arranged on the front surface of the gantry mounting frame 3 and located on one side of the first shaft hole 31. The locking block 4 is an L-shaped structure, and the slot between the locking block 4 and the gantry mounting frame 3 forms a limiting groove 5.

[0031] ​​The use process of the embodiment is that the front end of the pin shaft 1 is exposed after passing through the first shaft hole 31 from the front of the portal mounting frame 3, and the exposed part is the connecting end 13 for connecting with the clamp. During the insertion of the pin shaft 1, the bottom of the first rod 21 is located in the through hole 11, at this time, the second rod 22 can just avoid the locking block 4, as shown in Figure 2 When the pin shaft 1 is inserted, the elastic pin 2 is pressed as a whole, at this time, the second rod 22 of the elastic pin 2 is inserted into the limiting groove 5, the pin shaft 1 is locked and fixed, as shown in Figure 3 The connection of the portal and the clamp is realized.

[0032] Embodiment two

[0033] The basic structure of the embodiment is the same as that of the first embodiment, and the difference is that, as shown in Figure 4 The locking pin mechanism on the portal is used in pairs. In each locking pin mechanism, the pin shaft 1 passes out from the inside of the first shaft hole 31 to the two sides of the outside, and the exposed end is the connecting end 13, and the two symmetrical connecting ends 13 are used for simultaneously connecting the external device 7, that is, connecting the clamp. A mounting end is specifically provided on the clamp, and the mounting end includes two mounting plates 71, and each mounting plate 71 is provided with a mounting hole 72. When the clamp and the portal are docked, the two mounting plates 71 are inserted along the two sides of the two portal mounting frames 3, so that each mounting hole 72 corresponds to a first shaft hole 31, and then the pin shaft 1 is inserted from the inside to complete the connection.

[0034] As shown in Figure 5 and Figure 6 In the embodiment, the annular groove 12 is arranged at the tail end of the pin shaft 1, and the through hole 11 is arranged in the annular groove 12. The depth of the annular groove 12 is generally 1 / 3-2 / 3 of the diameter of the second rod 22, and preferably 1 / 2. The locking block 4 is arranged close to the first shaft hole 31, and the depth of the limiting groove 5 is arranged to be 1 / 3-2 / 3 of the diameter of the second rod 22, and preferably 1 / 2. Therefore, the limiting groove 5 and the annular groove 12 can form a complete groove structure for passing through the second rod 22. When the pin shaft 1 passes through the first shaft hole 31 and the mounting hole 72, the second rod 22 of the elastic pin 2 passes through the groove structure, so as to lock the axial movement and rotation of the pin shaft 1, completely lock the pin shaft 1, and make the structure after locking more stable.

[0035] The preferred embodiments of the application are described in detail above. It should be understood that those of ordinary skill in the art can make many modifications and changes without creative labor based on the concept of the application. Therefore, any technical solution obtained by logical analysis, reasoning or limited experiment based on the prior art according to the concept of the application shall be within the protection scope determined by the claims.

Claims

1. A locking pin structure, characterized in that, The device includes a pin (1), an elastic pin (2), a gantry mounting bracket (3), and a locking block (4). The pin (1) has a through hole (11) at its tail end. The elastic pin (2) has a U-shaped structure and includes a first rod (21), a bent section (23), and a second rod (22) connected in sequence. The first rod (21) passes through the through hole (11). The gantry mounting bracket (3) has a first shaft hole (31). The locking block (4) is located on the front of the gantry mounting bracket (3). A limiting groove (5) is formed between the locking block (4) and the gantry mounting bracket (3). The front end of the pin (1) protrudes from the front of the gantry mounting bracket (3) after passing through the first shaft hole (31), and the first rod (21) moves in the through hole (11) so that the second rod (22) connects to the limiting groove (5). The depth of the limiting groove (5) is 1 / 3 to 2 / 3 of the diameter of the second rod (22); the tail end of the pin (1) is provided with an annular groove (12), and the through hole (11) is set in the annular groove (12). The depth of the annular groove (12) is 1 / 3 to 2 / 3 of the diameter of the second rod (22); the length of the first rod (21) is greater than the length of the second rod (22); one end of the first rod (21) is provided with a limiting member (6) so that the first rod (21) cannot be dislodged from the through hole (11); the limiting groove (5) is close to the first shaft hole (31). When the pin (1) is inserted into the first shaft hole (31), the limiting groove (5) and the annular groove (12) form a slot structure for the second rod (22) to pass through; the locking block (4) is an L-shaped structure.

2. The locking pin structure according to claim 1, characterized in that, The limiting member (6) is the bent portion at the end of the first rod (21).

3. The locking pin structure according to claim 1, characterized in that, Two locking pin mechanisms are arranged opposite each other. The exposed end of the pin (1) in each locking pin mechanism after passing through the first shaft hole (31) is the connecting end (13). The two symmetrical connecting ends (13) are used to connect external devices (7) at the same time.

4. A locking pin structure according to claim 3, characterized in that, The external device (7) is provided with an assembly end, which includes two assembly plates (71), each assembly plate (71) having a mounting hole (72), and the connecting end (13) of the pin (1) is connected to the mounting hole (72).

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