Locking structure for main shaft of pile driver

Abstract

The utility model provides an anti-loosening structure for a main shaft of a pile driver, and belongs to the field of hydraulic breaking hammers. The problem that the fastening effect is often difficult to keep for a long time in a traditional anti-loosening mode such as a common nut and a gasket is solved. An anti-loosening structure of a main shaft of a pile driver comprises a suspension arm and a supporting frame installed on the suspension arm, a rotatable large gear is arranged at the bottom of the supporting frame, meshing teeth are arranged on the large gear, the suspension arm is connected with the supporting frame through a main shaft, a piston seat is arranged at the center of the suspension arm, and the piston seat is connected with the supporting frame. A nut playing a fixing role is arranged below the piston seat, a plurality of bolt holes are evenly formed in the nut, an anti-loosening disc playing an anti-loosening role is installed on the nut, through holes corresponding to the bolt holes are formed in the anti-loosening disc, the nut and the anti-loosening disc are connected through bolts, a limiting hole is formed in the anti-loosening disc, and the limiting hole is matched with the limiting hole. A limiting block matched with the bottom of the anti-loosening hole is arranged at the bottom of the main shaft. The utility model has the advantage of improving the stability of the main shaft.

Description

Technical Field

[0001] The utility model belongs to the technical field of heavy pile foundation engineering equipment manufacturing, and relates to a main shaft of a pile driver, in particular to an anti-loosening structure for the main shaft of a pile driver. Background Art

[0002] With the development of urbanization and the vigorous development of infrastructure construction in China, the construction industry has become popular again, and the construction machinery used in the construction industry has also been vigorously developed. The pile driver is one of the construction machinery. The pile driver consists of a pile hammer, a pile frame and auxiliary equipment, etc. The pile hammer is attached between two parallel vertical guide rods (commonly known as the gantry) at the front of the pile frame and is lifted by a lifting hook.

[0003] During the working process of the pile driver, as the core transmission component, the main shaft bears huge torque and vibration. Traditional anti-loosening methods such as ordinary nuts plus gaskets often have difficulty in maintaining the fastening effect for a long time. Especially under harsh working conditions, the loosening of the main shaft becomes a major hidden danger affecting the normal operation and safety of the equipment. Therefore, it is particularly important to design an efficient and reliable anti-loosening structure. Summary of the Invention

[0004] The purpose of the utility model is to provide an efficient and reliable anti-loosening structure for the main shaft of a pile driver in view of the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved by the following technical solutions: An anti-loosening structure for the main shaft of a pile driver, including a boom and a support frame installed on the boom. A rotatable large gear is arranged at the bottom of the support frame, and the large gear is provided with teeth. It is characterized in that the boom and the support frame are connected by a main shaft. A piston seat is arranged at the center of the boom. A nut for fixing is arranged below the piston seat. A plurality of bolt holes are evenly opened on the nut. An anti-loosening disk for anti-loosening is installed on the nut. Through holes corresponding to the bolt holes are arranged on the anti-loosening disk. The nut and the anti-loosening disk are connected to each other by bolts. A limiting hole is arranged inside the anti-loosening disk. A limiting block matched with the bottom of the anti-loosening hole is arranged at the bottom of the main shaft.

[0006] In the above anti-loosening structure for the main shaft of a pile driver, an external thread is arranged at the bottom of the main shaft, and an internal thread for fitting with the external thread of the main shaft is arranged inside the nut.

[0007] In the above anti-loosening structure for the main shaft of a pile driver, the limiting block is rectangular or hexagonal or octagonal.

[0008] Compared with the prior art, the anti-loosening structure of the main shaft of this pile driver can effectively prevent the loosening of the main shaft under high-speed operation and vibration environments through the triple anti-loosening protection of a special anti-loosening disc, limit holes, and limit blocks. The stable connection of the main shaft improves the overall stability of the pile driver and reduces equipment failures and downtime caused by the loosening of the main shaft. Brief Description of the Drawings

[0009] Figure 1 is a schematic three-dimensional structure diagram of the anti-loosening structure of the main shaft of this pile driver.

[0010] Figure 2 is a cross-sectional view of the anti-loosening structure of the main shaft of this pile driver.

[0011] In the figure, 1 is the boom; 2 is the support frame; 3 is the large gear; 4 is the main shaft; 5 is the piston seat; 6 is the nut; 7 is the bolt hole; 8 is the anti-loosening disc; 9 is the through hole; 10 is the bolt; 11 is the limit hole; 12 is the limit block; 13 is the external thread; 14 is the internal thread. Detailed Embodiment

[0012] The following are specific embodiments of the present invention and in combination with the drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0013] As Figure 1 , Figure 2 shown, the anti-loosening structure of the main shaft 4 of this pile driver includes a boom 1 and a support frame 2 installed on the boom 1. A rotatable large gear 3 is provided at the bottom of the support frame 2, and the large gear 3 is provided with teeth. It is characterized in that the boom 1 and the support frame 2 are connected by the main shaft 4. A piston seat 5 is provided at the center of the boom 1. A nut 6 for fixing is provided below the piston seat 5. A plurality of bolt holes 7 are evenly opened on the nut 6. An anti-loosening disc 8 for anti-loosening is installed on the nut 6. A through hole 9 corresponding to the bolt hole 7 is provided on the anti-loosening disc 8. The nut 6 and the anti-loosening disc 8 are connected to each other by a bolt 10. The bolt 10 is used to increase the connection between the anti-loosening disc 8 and the nut 6. A limit hole 11 is provided inside the anti-loosening disc 8. A limit block 12 matching the bottom of the anti-loosening hole is provided at the bottom of the main shaft 4. After installing the limit block 12, the limit hole 11 locks and fixes the anti-loosening disc 8. The anti-loosening disc 8 and the nut 6 are connected to fix the piston seat 5, and then the main shaft 4 is made more stable.

[0014] In further detail, an external thread 13 is provided at the bottom of the main shaft 4, and an internal thread 14 for fitting with the external thread 13 of the main shaft 4 is provided inside the nut 6. The nut 6 is tightly clamped on the main shaft 4 through the mutual cooperation of the external thread 13 and the internal thread 14.

[0015] To elaborate further, the limiting block 12 is rectangular or hexagonal or octagonal or polygonal, and the limiting block 12 can be an integral structure with the main shaft 4 or a split structure.

[0016] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the technical field to which the present utility model pertains can make various modifications or supplements to the described specific embodiments or use similar means for substitution, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

[0017] Although terms such as boom 1, support frame 2, large gear 3, main shaft 4, piston seat 5, nut 6, bolt hole 7, anti-loosening disk 8, through hole 9, bolt 10, limiting hole 11, limiting block 12, external thread 13, internal thread 14, etc. are used more frequently in this article, the possibility of using other terms is not excluded. The use of these terms is only to more conveniently describe and explain the essence of the present utility model; interpreting them as any additional limitation is contrary to the spirit of the present utility model.

Claims

1. Anti-loosening structure for the main shaft (4) of a pile driver, comprising a boom (1) and a support frame (2) mounted on the boom (1). A rotatable large gear (3) is provided at the bottom of the support frame (2), and the large gear (3) is provided with teeth. It is characterized in that, The boom (1) and the support frame (2) are connected by a main shaft (4). A piston seat (5) is arranged at the center of the boom (1). A nut (6) for fixing is arranged below the piston seat (5). A plurality of bolt holes (7) are evenly formed in the nut (6). A lock washer (8) for preventing loosening is installed on the nut (6). A through hole (9) corresponding to the bolt hole (7) is arranged on the lock washer (8). The nut (6) and the lock washer (8) are connected to each other by a bolt (10). A limiting hole (11) is formed in the lock washer (8). A limiting block (12) matching with the bottom of the anti-loosening hole is arranged at the bottom of the main shaft (4).

2. The anti-loosening structure of the main shaft (4) of a pile driver according to claim 1, characterized in that, External threads (13) are arranged at the bottom of the main shaft (4). Internal threads (14) for fitting with the external threads (13) of the main shaft (4) are arranged in the nut (6).

3. The anti-loosening structure of the main shaft (4) of a pile driver according to claim 1, characterized in that, The limiting block (12) is rectangular or hexagonal or octagonal.

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