Coaxiality adjusting and positioning device for diaphragm type coupling of engine

Abstract

The utility model discloses an engine diaphragm type coupling coaxiality adjusting and positioning device which comprises a positioning guide rod, a positioning flange and a pressing piece, the positioning guide rod is provided with a conical surface matched with a conical hole in a driven flange in a coupling, and the conical surface is used for positioning the driven flange in the coupling; one end of the positioning flange is provided with a first cylindrical surface which is in clearance fit with an inner hole in a driving flange in the coupling and is used for positioning the driving flange in the coupling; the pressing piece is installed on the positioning guide rod and used for pressing the positioning flange and all parts of the coupling. And a second cylindrical surface which is in clearance fit with the inner hole of the positioning flange is arranged on the positioning guide rod. According to the coaxiality adjusting and positioning device for the diaphragm type coupling of the engine, the relative positions of the master flange and the slave flange of the coupling and the diaphragm are fixed in advance before the master flange and the slave flange of the coupling are connected with the diaphragm, so that the coaxiality requirement is met during installation, and meanwhile, the diaphragm is prevented from being stressed and deformed in the assembly process.

Description

Technical Field

[0001] This utility model relates to the field of coaxiality adjustment of diaphragm couplings, and in particular to a coaxiality adjustment and positioning device for engine diaphragm couplings. Background Technology

[0002] Diaphragm couplings are critical rotating components connecting the engine's high-pressure oil pump to the drive unit. Their coaxiality after installation directly affects the operational stability of the high-pressure oil pump. If the coaxiality is out of tolerance, severe vibrations will occur during high-speed rotation, accelerating diaphragm wear and even causing diaphragm tearing, ultimately leading to engine malfunction. Therefore, ensuring high-precision coaxiality after coupling installation is crucial for engine reliability and operational performance.

[0003] Currently, diaphragm couplings are typically installed by connecting the diaphragm assembly to the main and driven flanges (drive and driven flanges). During installation, one flange is first pre-tightened with bolts, and then the other flange is aligned using a dial indicator to meet coaxiality requirements. However, because the diaphragm itself is elastic, it is prone to deformation during bolt tightening, leading to a deviation between the actual coaxiality after installation and the adjusted value. Repeated adjustments are often necessary to achieve the desired accuracy.

[0004] This traditional adjustment method is not only inefficient and time-consuming, but also difficult to guarantee the adjustment effect, especially in applications requiring mass assembly or high precision. Therefore, there is an urgent need for a more efficient and precise method or structural optimization scheme for diaphragm coupling coaxiality adjustment to improve installation accuracy, reduce adjustment difficulty, and ensure the long-term stable operation of the engine system. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a coaxiality adjustment and positioning device for an engine diaphragm coupling. By pre-fixing the relative positions of the main and driven flanges of the coupling with the diaphragm before connection, it ensures that the coaxiality requirements are met during installation, while simultaneously preventing the diaphragm from deforming under stress during assembly.

[0006] According to the first aspect of this utility model, the engine diaphragm type coupling coaxiality adjustment and positioning device includes:

[0007] A positioning guide rod is provided with a conical surface that mates with a tapered hole on the driven flange in the coupling, for positioning the driven flange in the coupling;

[0008] A positioning flange, one end of which is provided with a first cylindrical surface that is clearance-fitted with the inner hole of the active flange in the coupling, for positioning the active flange in the coupling;

[0009] A clamping component, which is mounted on the positioning guide rod, is used to clamp the positioning flange and various components of the coupling;

[0010] The positioning guide rod is provided with a second cylindrical surface that is clearance-fitted with the inner hole of the positioning flange.

[0011] In some embodiments of this utility model, the gap between the positioning guide rod and the positioning flange is less than 1 mil, and the coaxiality between the positioning guide rod and the positioning flange is less than 4 mil.

[0012] In some embodiments of this utility model, the height of the conical surface on the positioning guide rod is less than the height of the conical hole in the driven flange of the coupling.

[0013] In some embodiments of this utility model, the end of the positioning guide rod is provided with an external thread, the inner hole of the clamping member is provided with an internal thread that mates with the external thread, and the clamping member is screwed onto the external thread of the positioning guide rod through the internal thread.

[0014] The engine diaphragm coupling coaxiality adjustment and positioning device provided by this utility model has the following significant advantages through optimized assembly process and structural design:

[0015] 1. The precise fit between the positioning guide rod and the positioning flange ensures the coaxiality of the main and slave flanges of the coupling during the assembly process, avoiding errors caused by traditional manual adjustment and improving assembly accuracy and operational stability.

[0016] 2. The pre-clamping structure (clamping parts and positioning flange) completes the positioning and fixing of the coupling in one go, eliminating the tedious steps of repeated adjustments in the past, greatly shortening the assembly time, and is especially suitable for mass production;

[0017] 3. By utilizing the tool's own assembly precision (coaxiality of the positioning guide rod and positioning flange), the assembly quality of parts is directly guaranteed, reducing the impact of human operation, significantly improving the product qualification rate, and reducing rework and scrap costs;

[0018] 4. The modular assembly design allows for assembly simply by installing components such as flanges and diaphragms in sequence and tightening the clamping parts. This reduces the technical requirements for operators and makes it easy to promote and use.

[0019] 5. It is suitable for assembling diaphragm couplings of different specifications, and can flexibly adapt to the installation requirements of key components such as engine high-pressure oil pumps, and has broad engineering application prospects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of an engine diaphragm coupling coaxiality adjustment and positioning device according to an embodiment of the present invention;

[0021] Figure 2 This is a cross-sectional view of the present invention.

[0022] Figure label:

[0023] 1. Positioning guide rod; 11. Conical surface; 12. Second cylindrical surface;

[0024] 2. Positioning flange; 21. First cylindrical surface;

[0025] 3. Clamping components;

[0026] 4. Coupling; 41. Driven flange; 42. First bolt assembly; 43. Flat gasket; 44. Diaphragm; 45. Driven flange; 46. Second bolt assembly. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0028] The following is for reference. Figures 1 to 2 The engine diaphragm coupling coaxiality adjustment and positioning device according to an embodiment of the present invention includes a positioning guide rod 1, a positioning flange 2, and a clamping member 3. The positioning guide rod 1 has a conical surface 11 that mates with a tapered hole on the driven flange 41 in the coupling 4, for positioning the driven flange 41 in the coupling 4. One end of the positioning flange 2 has a first cylindrical surface 21 that clearance-mates with the inner hole of the driving flange 45 in the coupling 4, for positioning the driving flange 45 in the coupling 4. The clamping member 3 is mounted on the positioning guide rod 1 and is used to clamp the positioning flange 2 and the various components of the coupling 4. Simultaneously, the positioning guide rod 1 has a second cylindrical surface 12 that clearance-mates with the inner hole of the positioning flange 2.

[0029] Understandably, during installation, the positioning guide rod 1 can be fixed to the worktable first. Then, the driven flange 41 of the coupling 4 is fitted onto the positioning guide rod 1 via the end of the positioning guide rod 1 and moved to the conical surface 11 until the driven flange 41 can no longer move, thus achieving the positioning of the driven flange 41. At the same time, the driving flange 45 of the coupling 4 is fitted onto the first cylindrical surface 21 of the positioning flange 2 to achieve the positioning of the driving flange 45. Next, a flat gasket 43, a diaphragm 44, and another flat gasket 43 are arranged sequentially on the driven flange 41, i.e., there are two flat gaskets 43. For ease of explanation, they will be referred to as the first flat gasket and the second flat gasket, respectively. The flat gasket 43 arranged close to the driven flange 41 is the first flat gasket. Then, the positioned active flange 45 and positioning flange 2 are together fitted onto the positioning guide rod 1 via the end of the positioning guide rod 1, and the positioning flange 2 is moved to the second cylindrical surface 12 to achieve coaxial positioning of the positioning flange 2 and the positioning guide rod 1. Finally, the clamping member 3 is installed at the end of the positioning guide rod 1, and the position of the clamping member 3 is adjusted to clamp the positioning flange 2 and the various components of the coupling 4. Since the positioning guide rod 1 and the positioning flange 2 are arranged coaxially, the coaxiality of the active flange 45 and the driven flange 41 can be adjusted under the action of the positioning guide rod 1 and the positioning flange 2, so that the entire coupling 4 meets the coaxiality requirements.

[0030] It should be noted that after the phase positions of the active flange 45, driven flange 41, and diaphragm 44 are fixed, the connection between the flat gasket 43, diaphragm 44, driven flange 41, and active flange 45 can be achieved using multiple first bolt assemblies 42 and second bolt assemblies 46, such as before or after the clamping member 3 is tightened. Specifically, the two flat gaskets 43 and diaphragm 44 are connected and fixed to the driven flange 41 using the first bolt assembly 42, and the two flat gaskets 43 and diaphragm 44 are connected and fixed to the active flange 45 using the second bolt assembly 46. The multiple first bolt assemblies 42 are evenly distributed along the circumference of the driven flange 42, and the multiple second bolt assemblies 46 are also evenly distributed along the circumference of the driven flange 42. The first bolt assemblies 42 and second bolt assemblies 46 can be arranged at intervals. Correspondingly, the positioning flange 2, active flange 45, and driven flange 41 are respectively provided with through holes and mounting holes for the first bolt assemblies 42 and second bolt assemblies 46 to pass through or be installed.

[0031] Taking the installation of a first bolt assembly 42 and a second bolt assembly 46 as an example, the details are as follows:

[0032] The bolts of the first bolt assembly 42 are moved through the through hole of the positioning flange 2 and the through hole of the active flange 45 to a position close to the second flat gasket. Then, they are passed through the second flat gasket, the diaphragm 44, and the first flat gasket in sequence and extended into the mounting hole of the driven flange 41. The nuts of the first bolt assembly 42 are placed on the side of the driven flange 41 away from the diaphragm 44. The nuts are then tightened onto the bolts to connect and fix the second flat gasket, the diaphragm 44, the first flat gasket, and the driven flange 41.

[0033] Similarly, the bolts of the second bolt assembly 46 are moved through the through hole of the positioning flange 2 to the mounting hole of the active flange 45, and then the bolts are passed through the second flat gasket, the diaphragm 44, and the first flat gasket in sequence to the through hole of the driven flange 41. The nuts of the second bolt assembly 46 are placed in the through hole of the driven flange 41, and then the nuts are tightened on the bolts to connect and fix the driven flange 45, the second flat gasket, the diaphragm 44 and the first flat gasket.

[0034] According to the engine diaphragm coupling coaxiality adjustment and positioning device of this utility model, under the action of positioning guide rod 1 and positioning flange 2, the relative positions of the driving flange 45, driven flange 41 and diaphragm 44 of coupling 4 can be fixed before they are connected to each other, ensuring the coaxiality requirements of the two. At the same time, the diaphragm 44 is not under force, avoiding its deformation. After being connected to the positioning flange 45, no further adjustment is required, simplifying the installation process and improving the qualification rate after installation, which has high practical value.

[0035] To ensure the coaxiality of the coupling, in some embodiments of this utility model, the gap between the positioning guide rod and the positioning flange is less than 1 mil, and the coaxiality between the positioning guide rod and the positioning flange is less than 4 mil.

[0036] Considering that the positioning guide rod 1 has a second cylindrical surface 12 that fits with the inner hole of the positioning flange 2, the second cylindrical surface 12 enables the positioning flange 2 and the positioning guide rod 1 to be coaxially positioned. The driven flange 41 can be positioned on the positioning guide rod 1 via the conical surface 11, and the driving flange 45 can be positioned on the positioning flange 2 via the second cylindrical surface 12. Therefore, when the positioning flange 2 is fitted onto the second cylindrical surface 12 of the positioning guide rod 1, the driving flange 45 and the driven flange 41 are coaxially adjusted. If the height (i.e., width) of the conical surface 11 is too large, part of the conical surface may penetrate into the positioning flange 2, which is not conducive to the positioning of the positioning flange 2 and the positioning guide rod 1. Therefore, the height of the conical surface 11 on the positioning guide rod 1 is less than the height of the conical hole of the driven flange 41 in the coupling 4.

[0037] In some embodiments of this utility model, the end of the positioning guide rod 1 is provided with an external thread 13, and the inner hole of the clamping member 3 is provided with an internal thread that mates with the external thread 13. The clamping member 3 is screwed onto the external thread 13 of the positioning guide rod 1 through the internal thread. By rotating the clamping member 3, the position of the clamping member 3 on the positioning guide rod 1 can be changed to achieve clamping of components such as the positioning flange 2 and the coupling 4.

[0038] In summary, this utility model allows for the fixing of the positioning guide rod 1 on the worktable, the placement of the driven flange 41 of the coupling 4 onto the positioning guide rod 1, and the sequential arrangement of the flat gasket 43 and diaphragm 44. The positioning flange 2 is connected to the driving flange 45 and together they are fitted onto the positioning guide rod 1, simultaneously secured to the positioning guide rod by the clamping member 3. By clamping the positioning flange 2, the coupling 4 acts as a pre-clamping component. The coaxiality of the driven flange 41 and the driving flange 45 in the coupling 4 is ensured by the coaxiality of the positioning guide rod 1 and the positioning flange 2. Ultimately, by fixing the relative positions of the driving / driven flanges and the diaphragm before they are connected, the coaxiality requirement is guaranteed. Simultaneously, the diaphragm is not subjected to force at this time, preventing deformation. After connection with the positioning flange, no further adjustment is required, simplifying the installation process and improving the post-installation qualification rate, thus possessing high practical value.

[0039] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A coaxiality adjustment and positioning device for an engine diaphragm coupling, characterized in that, include: A positioning guide rod is provided with a conical surface that mates with a tapered hole on the driven flange in the coupling, for positioning the driven flange in the coupling; A positioning flange, one end of which is provided with a first cylindrical surface that is clearance-fitted with the inner hole of the active flange in the coupling, for positioning the active flange in the coupling; A clamping component is installed at the end of the positioning guide rod and is used to clamp the positioning flange and various components of the coupling. The positioning guide rod is provided with a second cylindrical surface that is clearance-fitted with the inner hole of the positioning flange.

2. The coaxiality adjustment and positioning device for an engine diaphragm coupling according to claim 1, characterized in that, The gap between the positioning guide rod and the positioning flange is less than 1 mil, and the coaxiality between the positioning guide rod and the positioning flange is less than 4 mil.

3. The coaxiality adjustment and positioning device for an engine diaphragm coupling according to claim 1, characterized in that, The height of the conical surface on the positioning guide rod is less than the height of the conical hole in the driven flange of the coupling.

4. The coaxiality adjustment and positioning device for an engine diaphragm coupling according to claim 1, characterized in that, The end of the positioning guide rod is provided with an external thread, and the inner hole of the clamping member is provided with an internal thread that matches the external thread. The clamping member is screwed onto the external thread of the positioning guide rod through the internal thread.

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