Stay bolt fastening and dismounting device for gas engine

Abstract

The utility model belongs to the technical field of fastening and dismounting tools, and particularly relates to a stay bolt fastening and dismounting device for a gas engine, which comprises a force application rod, a multiplier connected to one end of the force application rod, an extension rod connected to the bottom end of the multiplier, and a displacement mechanism connected to the bottom of the extension rod. A lower shell is arranged at the bottom of the upper shell in a matched mode, a first gear and a second gear which are meshed with each other are arranged between the upper shell and the lower shell, two first deflection sleeves are symmetrically fixed to the top and the bottom of the first gear, and two second deflection sleeves are symmetrically fixed to the top and the bottom of the second gear in a matched mode through stay bolts. By means of the lightweight and compact structural design, the device is easy to carry about, is not limited by construction sites any more, can be put into use quickly no matter in-site maintenance or emergency repair, and improves operation flexibility and response speed.

Description

Technical Field

[0001] The utility model belongs to the technical field of fastening and disassembling tools, and in particular relates to a fastening and disassembling device for a pull rod bolt of a gas engine. Background Art

[0002] During the maintenance and overhaul of gas engines, the removal of tie rod bolts is particularly important. Because the tie rod bolts are located below the rocker box, the available space is limited. Tightening and removing the tie rod bolts typically requires disassembling the entire rocker box first, a process that consumes both manpower and material resources and carries the risk of damaging the rocker box or other components during disassembly. At the repair site, environmental constraints make the tightening and removal of tie rod bolts almost entirely reliant on manpower, a task that is not only inefficient but also increases the operator's workload and safety risks. This can lead to delays and additional costs at time-sensitive repair sites.

[0003] There are currently two main methods for tightening and disassembling the tie rod bolts under the rocker box of a gas engine: one is to use a torque tightening machine, and the other is to use a wrench. When using a torque tightening machine to tighten and disassemble the tie rod bolts, if the torque is not properly controlled, it is easy to cause the tie rod bolts to deform or even break. When using a wrench to tighten and disassemble the tie rod bolts, due to the limited operating space, the operator's hands can easily be pinched or scratched. At the same time, before using the torque tightening machine and wrench, the rocker box needs to be disassembled in advance, which is not only time-consuming and labor-intensive, but also increases additional disassembly and assembly risks, affecting the maintenance efficiency and safety of the gas engine. Utility Model Content

[0004] The purpose of the utility model is to provide a tie rod bolt fastening and disassembly device for a gas engine, which can directly perform fastening and disassembly operations on the tie rod bolts under space-constrained conditions without disassembling the entire rocker box, thereby preventing additional disassembly and assembly risks, and at the same time simplifying the gas engine maintenance process, being able to flexibly cope with complex operating environments, improving operating efficiency, and reducing maintenance costs.

[0005] In order to achieve the above purpose, the technical solution of the utility model is:

[0006] The pull rod bolt fastening and disassembly device for a gas engine described in the utility model includes a force rod, one end of the force rod is connected to a multiplier, the bottom end of the multiplier is connected to an extension rod, the bottom of the extension rod is connected to a shifting mechanism, the shifting mechanism includes an upper shell, a lower shell is provided at the bottom of the upper shell, a gear 1 and a gear 2 that are meshed with each other are provided between the upper shell and the lower shell, two groups of shifting sleeves 1 are symmetrically fixed to the top and bottom of the gear 1, and two groups of shifting sleeves 2 are symmetrically fixed to the top and bottom of the gear 2 in cooperation with the pull rod bolts.

[0007] in:

[0008] The upper shell cooperates with the shift sleeve 1 and the shift sleeve 2 to respectively set a limiting hole 1 and a limiting hole 2.

[0009] The lower shell cooperates with the shift sleeve 1 and the shift sleeve 2 to respectively set the limiting hole 3 and the limiting hole 4.

[0010] The two groups of displacement sleeves 1 are rotatably arranged in the limiting hole 1 and the limiting hole 3 respectively, and the two groups of displacement sleeves 2 are rotatably arranged in the limiting hole 2 and the limiting hole 4 respectively.

[0011] The upper shell and the lower shell are fixedly connected by a plurality of sets of fastening bolts.

[0012] The multiplier comprises a multiplier body, the top of the multiplier body is provided with an input driving square head, the bottom of the multiplier body is provided with an output driving square head, and a reaction force arm is fixedly provided on the side wall of the multiplier body.

[0013] One end of the force applying rod is fixedly provided with a sleeve 1 in cooperation with the input driving square head, and the force applying rod is arranged perpendicular to the sleeve 1.

[0014] The top end of the extension rod is fixedly provided with a sleeve 2 in cooperation with the output driving square head.

[0015] The bottom end of the extension rod is fixedly provided with an extension rod square head in cooperation with a displacement sleeve.

[0016] The ratio of the input torque to the output torque in the multiplier is 1:1.2-2.

[0017] The beneficial effects of the utility model are:

[0018] The utility model can make full use of the narrow operating space by arranging the force rod, the extension rod and the displacement mechanism. It can accurately position and rotate the tie rod bolt under the condition of limited space, realize the efficient transmission of torque, and ensure that the tie rod bolt can be tightened or disassembled smoothly. At the same time, the tie rod bolt can be tightened and disassembled directly without disassembling the entire rocker box, thereby avoiding additional disassembly and assembly risks during the disassembly of the rocker box, simplifying the gas engine maintenance process, improving operation efficiency and reducing maintenance costs. The utility model is easy to carry with it due to its lightweight and compact structural design, and is no longer subject to the restrictions of the construction site. It can be quickly put into use whether it is on-site maintenance or emergency repair, thereby improving the flexibility and response speed of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the utility model;

[0020] Figure 2 This is an exploded view of the utility model;

[0021] Figure 3 This is a schematic structural diagram of the multiplier in the present utility model;

[0022] Figure 4 This is an exploded view of the displacement mechanism in the utility model;

[0023] In the figure: 1. force rod; 2. sleeve 1; 3. multiplier; 301. multiplier body; 302. input drive square head; 303. output drive square head; 304. reaction force arm; 4. sleeve 2; 5. extension rod; 6. extension rod square head; 7. shifting mechanism; 701. upper shell; 702. lower shell; 703. shifting sleeve 1; 704. shifting sleeve 2; 705. gear 1; 706. gear 2; 707. fastening bolt; 708. limit hole 1; 709. limit hole 2; 710. limit hole 3; 711. limit hole 4. DETAILED DESCRIPTION

[0024] The present invention will be described and illustrated in detail below with reference to the embodiments.

[0025] Example 1

[0026] like Figure 1-4 As shown, the pull rod bolt fastening and disassembly device for a gas engine described in the utility model includes a force rod 1, one end of the force rod 1 is connected to a multiplier 3, the bottom end of the multiplier 3 is connected to an extension rod 5, the bottom of the extension rod 5 is connected to a shifting mechanism 7, the shifting mechanism 7 includes an upper shell 701, a lower shell 702 is provided at the bottom of the upper shell 701, a gear 1 705 and a gear 2 706 that mesh with each other are provided between the upper shell 701 and the lower shell 702, two groups of shifting sleeves 1 703 are symmetrically fixed to the top and bottom of the gear 1 705, and two groups of shifting sleeves 2 704 are symmetrically fixed to the top and bottom of the gear 2 706 in cooperation with the pull rod bolts.

[0027] Torque is applied to the multiplier 3 through the force rod 1, which is convenient for the operator to operate and ensures the stability and accuracy of the applied torque; the multiplier 3 is used to increase the torque input by the force rod 1 and improve the utilization efficiency of the torque; the torque output by the multiplier 3 is transmitted to the displacement mechanism 7 through the extension rod 5. The design of the extension rod 5 not only extends the operating distance of the pull rod bolt tightening and disassembly operation, but also ensures that the torque input from the multiplier 3 can be stably transmitted to the displacement structure 7 to meet the force requirements of the displacement mechanism 7; the displacement mechanism 7 realizes the transmission and conversion of torque through the mutually meshing gear 1 705 and gear 2 706, and the nut of the pull rod bolt can be inserted into the displacement sleeve 2 704 to ensure that when the torque is applied, the torque can be accurately transmitted to the pull rod bolt to realize its tightening or disassembly operation.

[0028] The upper shell 701 cooperates with the shift sleeve 1 703 and the shift sleeve 2 704 to respectively set a limiting hole 1 708 and a limiting hole 2 709.

[0029] The lower shell 702 cooperates with the shift sleeve 1 703 and the shift sleeve 2 704 to respectively set a limiting hole 3 710 and a limiting hole 4 711.

[0030] The two sets of displacement sleeves 1 703 are rotatably disposed in the limiting hole 1 708 and the limiting hole 3 710 , respectively. The two sets of displacement sleeves 2 704 are rotatably disposed in the limiting hole 2 709 and the limiting hole 4 711 , respectively.

[0031] The upper shell 701 and the lower shell 702 are fixedly connected by a plurality of sets of fastening bolts 707 .

[0032] The multiplier 3 includes a multiplier body 301 . An input drive square head 302 is provided at the top of the multiplier body 301 . An output drive square head 303 is provided at the bottom of the multiplier body 301 . A reaction force arm 304 is fixedly provided on the side wall of the multiplier body 301 .

[0033] Fixing the reaction arm 304 can prevent the multiplier body 301 from moving together with the gears inside the multiplier 3 when the force rod 1 is rotated.

[0034] One end of the force rod 1 is fixedly provided with a sleeve 2 in cooperation with the input driving square head 302 , and the force rod 1 is arranged perpendicular to the sleeve 2 .

[0035] The top end of the extension rod 5 is fixedly provided with a sleeve 2 4 in cooperation with the output drive square head 303 .

[0036] The bottom end of the extension rod 5 is fixedly provided with an extension rod square head 6 in cooperation with a displacement sleeve 703.

[0037] The ratio of input torque to output torque in the multiplier 3 is 1:1.2-2.

[0038] The multiplier 3 can amplify the input torque in a ratio of 1:1.2-1.8, thereby improving the utilization efficiency of the torque, so that the operator can complete the disassembly and tightening operations of the pull rod bolt with relatively small force.

[0039] Working process and principle:

[0040] During operation, the operator first adjusts the position of the shifting mechanism 7 according to the workspace and fits the second shifting sleeve 704 onto the nut of the tie rod bolt, ensuring a tight fit. The operator then sequentially installs the extension rod square head 6 and shifting sleeve 1 703, sleeve 2 4 and output drive square head 303, and sleeve 1 2 and input drive square head 302. The extension rod 5 connects the shifting mechanism 7 and multiplier 3, forming a complete torque transmission path.

[0041] After the installation is completed, the operator fixes the reaction arm 304 and rotates the force rod 1 to apply torque to the multiplier 3. The torque is amplified by the multiplier 3 at a ratio of 1:1.5. The torque output by the multiplier 3 is transmitted to the displacement sleeve 1 703 through the extension rod 5. The displacement sleeve 1 703 drives the gear 1 705 to rotate, and then drives the gear 2 706 to rotate. The displacement sleeve 2 704 rotates accordingly, generating a force on the nut of the tie rod bolt, completing the tightening and disassembly operation of the tie rod bolt.

Claims

1. A tie rod bolt fastening and disassembly device for a gas engine, comprising a force application rod (1), characterized in that: One end of the force rod (1) is connected to a multiplier (3), the bottom end of the multiplier (3) is connected to an extension rod (5), the bottom of the extension rod (5) is connected to a displacement mechanism (7), the displacement mechanism (7) comprises an upper shell (701), the bottom of the upper shell (701) is matched with a lower shell (702), a gear 1 (705) and a gear 2 (706) that mesh with each other are provided between the upper shell (701) and the lower shell (702), two groups of displacement sleeves 1 (703) are symmetrically fixed to the top and bottom of the gear 1 (705), and two groups of displacement sleeves 2 (704) are symmetrically fixed to the top and bottom of the gear 2 (706) by pull rod bolts.

2. The tie rod bolt fastening and disassembly device for a gas engine according to claim 1, characterized in that: The upper shell (701) cooperates with the shifting sleeve 1 (703) and the shifting sleeve 2 (704) to respectively provide a limiting hole 1 (708) and a limiting hole 2 (709).

3. The tie rod bolt fastening and disassembly device for a gas engine according to claim 2, characterized in that: The lower shell (702) cooperates with the shifting sleeve 1 (703) and the shifting sleeve 2 (704) to respectively provide a limiting hole 3 (710) and a limiting hole 4 (711).

4. The tie rod bolt fastening and disassembly device for a gas engine according to claim 3, characterized in that: The two sets of displacement sleeves 1 (703) are respectively rotatably arranged in the limiting hole 1 (708) and the limiting hole 3 (710), and the two sets of displacement sleeves 2 (704) are respectively rotatably arranged in the limiting hole 2 (709) and the limiting hole 4 (711).

5. The tie rod bolt fastening and disassembly device for a gas engine according to claim 1, characterized in that: The upper shell (701) and the lower shell (702) are fixedly connected by a plurality of sets of fastening bolts (707).

6. The tie rod bolt fastening and disassembly device for a gas engine according to claim 1, characterized in that: The multiplier (3) comprises a multiplier body (301), an input drive square head (302) is provided at the top end of the multiplier body (301), an output drive square head (303) is provided at the bottom end of the multiplier body (301), and a reaction force arm (304) is fixedly provided on the side wall of the multiplier body (301).

7. The tie rod bolt fastening and disassembly device for a gas engine according to claim 6, characterized in that: One end of the force rod (1) is fixedly provided with a sleeve (2) in cooperation with the input drive square head (302), and the force rod (1) is provided perpendicular to the sleeve (2).

8. The tie rod bolt fastening and disassembly device for a gas engine according to claim 6, characterized in that: The top end of the extension rod (5) is fixedly provided with a sleeve second (4) in cooperation with the output drive square head (303).

9. The tie rod bolt fastening and disassembly device for a gas engine according to claim 1, characterized in that: The bottom end of the extension rod (5) is fixedly provided with an extension rod square head (6) in cooperation with the displacement sleeve 1 (703).

10. The tie rod bolt fastening and disassembly device for a gas engine according to claim 1, characterized in that: The ratio of input torque to output torque in the multiplier (3) is 1:1.2-2.

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