Disassembling and assembling tool for speed measuring sensor of diesel engine

Abstract

The utility model provides a dismounting tool for a diesel engine speed measurement sensor, and belongs to the technical field of tools. Comprising a wrench head, an extension rod and a handle, the wrench head is provided with a wrench head opening used for being meshed with a locking nut on the speed measurement sensor, one end of the extension rod is connected with the wrench head, the joint avoids the wrench head opening, and the other end of the extension rod is connected with the handle. Through the wrench head with an opening, the extension rod in offset connection and the handle capable of being matched with a torque wrench, the disassembling and assembling tool solves the problem that a sensor is inconvenient to disassemble and assemble in a limited space, and the maintainability of a diesel engine is improved; the problem that a torque wrench cannot be used for torque fastening according to requirements is solved, the sensor can be reliably fastened, and the mounting reliability of the sensor and the operation safety of a diesel engine are improved. Possible harm to operators caused by disassembly and assembly operation is avoided, and potential safety hazards of the operators are eliminated.

Description

Technical Field

[0001] This utility model belongs to the field of tool technology, specifically relating to a tool for disassembling and assembling a diesel engine speed sensor. Background Technology

[0002] Marine diesel engines are all equipped with speed sensors for acquiring and measuring engine speed signals. The speed sensor's shape is as follows: Figure 13 As shown, the speed sensor is typically mounted on a housing close to the flywheel ring gear, with the sensor aligned directly with the teeth of the flywheel ring gear. The sensor housing is concentric with the crankshaft center to ensure the sensor is aligned with the flywheel teeth and points towards the crankshaft center. Thus, the sensor housing is generally recessed a certain distance into the side of the engine compartment. Furthermore, the sensor mounting location also houses other components such as the starter motor, and since the diesel engine is mounted behind the ship's hull base, with the speed sensor located below the platform, the space for disassembling and assembling the speed sensor is extremely limited, making sensor disassembly, assembly, and maintenance very inconvenient.

[0003] like Figure 13 As shown, the speed sensor 4 is installed using a double nut 5 for locking, and the nuts need to be tightened to a certain torque. Since the speed sensor comes with a cable 6, the end of which is an aviation connector 7, it is not possible to use a torque wrench with a socket and extension rod to tighten it to the required torque. In addition, the aviation connector cannot be inserted into a regular box wrench or ratchet wrench, so it cannot be used. Only a regular open-end wrench or a box wrench with an open end can be used.

[0004] Based on the structural characteristics of the speed sensor and the actual conditions of its installation location, using ordinary tools like wrenches to disassemble and repair the speed sensor has the following drawbacks:

[0005] 1. Using a regular open-end wrench or a box wrench to install and remove the speed sensor is inconvenient due to space limitations. People cannot get close to the sensor and can only reach their arm to it. Furthermore, it is impossible to guarantee that the required torque will be applied and that the sensor will be securely tightened.

[0006] 2. Due to space constraints, installers using standard open-end wrenches or open-end box wrenches face limited rotation angles, making it difficult to tighten the screws at certain angles. If the sensor becomes loose, the distance between the speed sensor tip and the flywheel gear tooth surface changes, causing distorted speed measurements and potentially leading to serious engine overrunning.

[0007] 3. When using a regular open-end wrench or a box wrench for installation and removal, the wrench can only be tilted and locked onto the sensor nut. It is easy to slip during operation, which may cause injury to the operator and damage the sensor.

[0008] Therefore, it is necessary to propose improvements to address the aforementioned problems. Utility Model Content

[0009] The technical problem solved by this utility model is as follows: The purpose of this utility model is to overcome the problems existing in the above-mentioned prior art solutions, break through the structural design of existing ordinary wrenches, and provide a tooling for disassembling and assembling diesel engine speed sensors in response to the disassembly and assembly requirements of marine diesel engine speed sensors. This solves the problem of inconvenient disassembly and assembly of sensors in confined spaces; solves the problem of not being able to use torque wrenches to tighten to the required torque; avoids potential injuries to operators during disassembly and assembly operations, and eliminates personnel safety hazards.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0011] A tool for disassembling and assembling a diesel engine speed sensor includes a wrench head, an extension rod, and a handle. The wrench head has a wrench head opening for engaging with a locking nut on the speed sensor. One end of the extension rod is connected to the wrench head, with the connection avoiding the wrench head opening, and the other end of the extension rod is connected to the handle.

[0012] As a further limitation of the above scheme, the wrench head opening is set at an angle, and the size of the wrench head opening is determined according to the locking nut on the speed sensor.

[0013] As a further limitation of the above scheme, the opening of the wrench head is set at 15° with the vertical line of the end face of the wrench head as the reference line.

[0014] Further defining the above scheme, the opening size of the wrench head is 27mm, and the opening gap of the wrench head is 27 + 0.2mm.

[0015] As a further limitation of the above scheme, the extension rod is a semi-circular structure made of steel pipe.

[0016] Further defining the above solution, one side of the end face of the wrench head is provided with an arc-shaped connecting groove I for welding connection with the end face of the extension rod, and one side of the end face of the handle is provided with an arc-shaped connecting groove II for welding connection with the end face of the extension rod.

[0017] As a further limitation of the above scheme, the handle is an external hexagonal structure that can match the sleeve structure of a torque wrench.

[0018] As a further limitation of the above solution, the wrench head, extension rod and handle are all subjected to surface oxidation anti-corrosion treatment.

[0019] Advantages of this utility model compared to the prior art:

[0020] 1. This solution breaks through the structural design of existing ordinary wrenches and provides a tool for disassembling and assembling speed sensors for marine diesel engines, specifically addressing the requirements for such applications. This tool, with its open-end wrench head, offset extension rod, and handle compatible with torque wrenches, solves the problem of inconvenient sensor disassembly and assembly in confined spaces, improving diesel engine maintainability; it also solves the problem of not being able to use torque wrenches to tighten to the required torque, ensuring reliable sensor fastening, improving sensor installation reliability and diesel engine operating safety; and it avoids potential injury to operators during disassembly and assembly, eliminating personnel safety hazards.

[0021] 2. This solution improves the maintainability of speed sensors during actual ship operation and maintenance, enhances the reliability and safety of sensor fastening, avoids potential injuries to operators during disassembly and assembly, and eliminates personnel safety hazards.

[0022] 3. This solution effectively addresses the problems encountered in the actual use of diesel engines, demonstrating strong practicality. It proposes a new design concept for the design of specialized tools for the disassembly and installation of diesel engine parts, and has a wide range of applications and significant potential for wider adoption. Attached Figure Description

[0023] Figure 1 This is a front view of the overall structure of this utility model;

[0024] Figure 2 This is a top view of the overall structure of this utility model;

[0025] Figure 3 This is a left view of the overall structure of this utility model;

[0026] Figure 4 This is a right view of the overall structure of this utility model;

[0027] Figure 5 This utility model Figure 1 A schematic diagram of the AA-direction structure in the diagram;

[0028] Figure 6 This utility model Figure 1 Schematic diagram of the BB-direction structure in the middle;

[0029] Figure 7 This is a front view of the wrench head in this utility model;

[0030] Figure 8 This is a top view of the wrench head in this utility model;

[0031] Figure 9 This is a front view of the extension rod in this utility model;

[0032] Figure 10This is a left view of the extension rod in this utility model;

[0033] Figure 11 This is a front view of the handle in this utility model;

[0034] Figure 12 This is a top view of the handle in this utility model;

[0035] Figure 13 This is a schematic diagram of the speed sensor. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0037] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Please see Figure 1-13 The embodiments of this utility model are described in detail below.

[0039] Example: Tools for disassembling and assembling diesel engine speed sensors, see [link / reference]. Figure 1-6 As shown, it includes a wrench head 1, an extension rod 2, and a handle 3. The wrench head 1 is provided with a wrench head opening 1-1 for engaging with a locking nut on a speed sensor. One end of the extension rod 2 is connected to the wrench head 1, and the connection point avoids the wrench head opening 1-1. The other end of the extension rod 2 is connected to the handle 3.

[0040] The disassembly and assembly tool for the diesel engine speed sensor in this embodiment is a welded component. The extension rod and handle are in a straight line, and the wrench head is welded to the extension rod at a right angle. This tool, through its open wrench head, offset extension rod, and handle compatible with a torque wrench, solves the problem of inconvenient sensor disassembly and assembly in confined spaces, improving diesel engine maintainability; it also addresses the issue of not being able to use a torque wrench to tighten to the required torque, ensuring reliable sensor fastening, improving sensor installation reliability and diesel engine operating safety; and it avoids potential injury to operators during disassembly and assembly, eliminating personnel safety hazards.

[0041] In one specific implementation: See Figure 7-8 As shown, the opening 1-1 of the wrench head is set at an angle, and the size of the opening 1-1 is determined according to the locking nut on the speed sensor.

[0042] Preferably, the opening 1-1 of the wrench head is set at 15° with the vertical line of the end face of the wrench head 1 as the reference line.

[0043] Preferably, the opening size of the wrench head opening 1-1 is 27mm, and the opening gap of the wrench head opening 1-1 is 27+0.2mm.

[0044] In this embodiment, the wrench head has an open structure. The opening on the wrench head is set at a 15° angle with the vertical line of the end face of the wrench head as the reference line, and the size of the opening is 27mm. It is adapted to the locking nut of the speed sensor, so that the locking nut of the speed sensor can be fully tightened or loosened in a narrow space.

[0045] Due to space constraints at the diesel engine speed sensor mounting location, the maximum rotation angle of the speed sensor tightening wrench is 35-40°. The speed sensor uses two hexagonal lock nuts, each turn of which requires 60°. Furthermore, the speed sensor cable restricts the wrench's operation, necessitating an open-end design; a ratchet wrench is not feasible. The wrench head must be capable of installation within a 40° rotation angle range and engaging with the speed sensor lock nuts. This design uses a 27mm open-end wrench head, allowing for speed sensor installation and adjustment within a 35° range.

[0046] To prevent slippage during the installation and removal of the speed sensor locking nut, the wrench head must be positioned away from the speed sensor cable and fitted onto the locking nut. Due to the presence of components such as a starter motor near the speed sensor, the wrench head's position should be determined based on the actual site conditions, ensuring the opening on the wrench head is angled, i.e., at a certain angle to the extension rod. This facilitates installation and also prevents slippage.

[0047] To ensure sufficient strength of the wrench head and facilitate the insertion of the sensor's locking nut, on-site measurements and tests verified that a gap of 27 + 0.2 mm ensures sufficient strength of the wrench head.

[0048] In one specific implementation: See Figure 9-10 As shown, the extension rod 2 is a semi-circular structure made of steel pipe.

[0049] In this embodiment, the extension rod is machined from a round steel tube, allowing the speed sensor nut to be tightened and extended to a remote location, thus improving operability. While controlling the overall weight, the strength and rigidity of the extension rod are maximized, improving the compatibility between the wrench head and the speed sensor locking nut and preventing slippage during use.

[0050] The length of the extension rod was determined based on actual site conditions and experimental verification to ensure that it does not interfere with other components during assembly and disassembly, thus improving the operability and safety of the device. While increasing the extension rod length increases the torque, it also increases the tendency for the wrench to slip. Based on experimental results, it was determined that the extension rod is machined from a round steel tube, which is both easy to grip and reduces the weight of the wrench, thereby making assembly and disassembly easier.

[0051] In one specific implementation: See Figure 11 , 12 As shown, the handle 3 is an external hexagonal structure that can be matched with the sleeve structure of a torque wrench.

[0052] In this embodiment, the handle adopts an external hexagonal structure, which matches the sleeve structure of the torque wrench. Therefore, a torque wrench can be connected to the handle, and the sensor locking nut can be tightened according to the specified torque value, which improves the reliability of the tightening and ensures that the on-site construction operation meets the process technology requirements and the consistency and compliance between the document technical requirements and the actual operation.

[0053] In one specific implementation: See Figure 7 , 12 As shown, one side of the end face of the wrench head 1 is provided with an arc-shaped connecting groove Ⅰ1-2 for welding connection with the end face of the extension rod 2, and one side of the end face of the handle 3 is provided with an arc-shaped connecting groove Ⅱ3-1 for welding connection with the end face of the extension rod 2.

[0054] By designing grooves on the wrench head and handle that match the shape and specifications of the extension rod, the extension rod is inserted into the groove of the wrench head and welded, thereby enhancing the strength and reliability of the device.

[0055] In one specific embodiment: the wrench head 1, the extension rod 2, and the handle 3 are all treated with surface oxidation for rust prevention.

[0056] In this embodiment, the entire set of disassembly and assembly tools adopts surface oxidation for rust prevention, which improves the performance of the device and gives it high environmental adaptability.

[0057] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A tool for disassembling and assembling a diesel engine speed sensor, characterized in that: It includes a wrench head (1), an extension rod (2) and a handle (3). The wrench head (1) has a wrench head opening (1-1) for engaging with the locking nut on the speed sensor. One end of the extension rod (2) is connected to the wrench head (1) and the connection avoids the wrench head opening (1-1). The other end of the extension rod (2) is connected to the handle (3).

2. The tool for disassembling and assembling a diesel engine speed sensor according to claim 1, characterized in that: The opening (1-1) of the wrench head is set at an angle, and the size of the opening (1-1) is determined according to the locking nut on the speed sensor.

3. The tool for disassembling and assembling a diesel engine speed sensor according to claim 2, characterized in that: The opening (1-1) of the wrench head is set at 15° with the vertical line of the end face of the wrench head (1) as the reference line.

4. The tool for disassembling and assembling a diesel engine speed sensor according to claim 2, characterized in that: The opening size of the wrench head opening (1-1) is 27mm, and the opening gap of the wrench head opening (1-1) is 27+0.2mm.

5. The tool for disassembling and assembling a diesel engine speed sensor according to claim 1, characterized in that: The extension rod (2) is a semi-circular structure made of steel pipe.

6. The tool for disassembling and assembling a diesel engine speed sensor according to claim 5, characterized in that: The end face of the wrench head (1) is provided with an arc-shaped connecting groove I (1-2) for welding to match the end face shape of the extension rod (2), and the end face of the handle (3) is provided with an arc-shaped connecting groove II (3-1) for welding to match the end face shape of the extension rod (2).

7. The tool for disassembling and assembling a diesel engine speed sensor according to claim 1, characterized in that: The handle (3) is an external hexagonal structure that can be matched with the sleeve structure of a torque wrench.

8. The tool for disassembling and assembling a diesel engine speed sensor according to claim 1, characterized in that: The wrench head (1), extension rod (2) and handle (3) are all treated with surface oxidation for rust prevention.

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