High-speed high-power diesel engine dual-bearing idle wheel part inspection tool

Abstract

The invention provides a high-speed high-power diesel engine double-bearing idle wheel part inspection tool which comprises a positioning rod, one end of the positioning rod is provided with an end cap, the other end of the positioning rod is provided with a pressing sleeve, the pressing sleeve is locked by a locking piece on the positioning rod, meanwhile, one side, facing the pressing sleeve, of the end cap is provided with a pressing pad, the end faces of the two sides of the pressing pad are parallel, and the end faces of the two sides of the pressing sleeve are parallel. The pressing sleeve comprises a pressing plate part and a sleeve part, the sleeve part faces one side of the end cap, and a positioning rod penetrating hole is formed in the pressing plate part. When the device is applied, the pressing sleeve is in clearance fit with the extending end of the bearing seat of the idle wheel component, after the pressing sleeve is locked through the locking piece, the pressing pad supports the end face of the bearing seat, and the rotation flexibility of the idle wheel component can be checked according to the stress application state of complete machine assembly before complete machine assembly; the functional qualification rate of the idle wheel part after assembly can be effectively improved, the proportion that the idle wheel part cannot flexibly rotate after complete machine assembly is reduced, and the complete machine assembly efficiency of the diesel engine is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of idler wheel assembly production, and particularly relates to an inspection tooling for a double-bearing idler wheel component of a high-speed high-power diesel engine. Background Art

[0002] The oil pump idler wheel transmits the output power of the diesel engine to the oil pump through the crankshaft. The oil pump is responsible for pumping the engine oil in the oil sump to the entire engine oil circulation system of the diesel engine for lubrication and partial cooling of the diesel engine, so as to ensure the normal operation of the diesel engine. For general diesel engines, since their rotational speed and power are not very high, their idler wheel components are generally single-bearing. However, for high-speed high-power diesel engines, due to their high rotational speed and large output power, the rotational speed of the oil pump idler wheel during operation is very high, and the transmitted force it bears is also large. During the operation process, it is required that the oil pump idler wheel can minimize its own power consumption of the diesel engine and stably transmit the power output by the crankshaft to the oil pump. At the same time, this high-speed high-power characteristic also has relatively high requirements for the strength and service life of the oil pump idler wheel itself. In order to extend the service life of this kind of oil pump idler wheel and improve its use reliability, this kind of idler wheel uses a design of double-direction centripetal thrust ball bearings. However, the rotational flexibility of such idler wheel components can only be checked according to the actual use conditions after the complete assembly of the components of the whole machine. Once it is found that it cannot rotate flexibly, only the assembled components can be disassembled from the diesel engine, then disassembled into parts, reassembled again, assembled on the whole machine, and the flexibility is checked after applying force. Sometimes this process needs to be carried out multiple times, seriously affecting the efficiency of the whole machine assembly of the diesel engine and having a serious impact on the progress of mass production. Summary of the Invention

[0003] In view of this, the present invention aims to overcome the defects in the prior art and proposes an inspection tooling for a double-bearing idler wheel component of a high-speed high-power diesel engine.

[0004] To achieve the above object, the technical solution of the present invention is realized as follows:

[0005] An inspection tooling for a double-bearing idler wheel component of a high-speed high-power diesel engine includes a positioning rod. One end of the positioning rod is provided with an end cap, and the other end is provided with a pressure sleeve, and the pressure sleeve is locked by a locking member on the positioning rod. At the same time, a pressure pad is provided on the side of the end cap facing the pressure sleeve, and the two end faces of the pressure pad are parallel, and the two end faces of the pressure sleeve are parallel; the pressure sleeve includes a pressing plate portion and a sleeve portion. The sleeve portion faces the end cap side, and a positioning rod through hole is provided on the pressing plate portion.

[0006] Further, the positioning rod is a bolt.

[0007] Further, the locking member is a nut.

[0008] Furthermore, the parallelism of the two end faces of the pressure pad is 0.02 mm.

[0009] Furthermore, the roughness of the two end faces of the pressure pad is 0.8 µm.

[0010] Furthermore, a chamfer structure is provided at the inner wall of the end of the sleeve portion.

[0011] Furthermore, the positioning rod and the positioning rod through-hole are in sliding fit.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] The present invention has a simple structure and is easy to operate. The extended end of the bearing seat of the pressure sleeve and the idler wheel component is in clearance fit. After locking the pressure sleeve with the locking member, the pressure pad supports the end face of the bearing seat. By applying this tooling, the rotational flexibility of the idler wheel component can be checked according to the force application state of the whole machine assembly before the whole machine assembly, which can effectively improve the functional qualification rate of the idler wheel component after assembly, reduce the proportion of the idler wheel component that cannot rotate flexibly after the whole machine assembly is completed, and improve the whole machine assembly efficiency of the diesel engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0015] Figure 1 is a schematic structural diagram of the present invention;

[0016] Figure 2 is a schematic diagram of the positioning rod part in the present invention;

[0017] Figure 3 is a schematic diagram of the pressure sleeve in the present invention;

[0018] Figure 4 is Figure 3 the left view of;

[0019] Figure 5 is a schematic diagram of the pressure pad in the present invention;

[0020] Figure 6 is Figure 5 the left view of. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other.

[0022] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0023] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific circumstances.

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

[0025] An inspection tooling for a double-bearing idler wheel component of a high-speed high-power diesel engine, as Figures 1 to 6 shown, includes a positioning rod 1. One end of the positioning rod is provided with an end cap 2, and the other end is provided with a compression sleeve 3. The compression sleeve is locked by a locking member 4 on the positioning rod. At the same time, a pressure pad 5 is provided on the side of the end cap facing the compression sleeve. The pressure pad protects the end face of the bearing seat of the idler wheel component when tightened by a bolt. The two end faces of the pressure pad are parallel, and the two end faces of the compression sleeve are parallel. By applying the tooling provided by the present invention, before the whole machine assembly, the flexibility of the bearing rotation of the idler wheel component can be conveniently checked, and thus the flexibility of the idler wheel component can be checked separately, instead of the situation where it can only be checked when the whole machine is in a complete state, thereby improving the functional qualification rate of the assembled idler wheel component with additional force.

[0026] The roughness of both end faces of the pressure pad is 0.8um. To prevent scratching the end face of the bearing, a relatively high roughness requirement of Ra0.8 is designed for its end face. At the same time, since this part is a symmetric graphic part, in actual operation, in order to improve the operation efficiency and save the time for personnel to distinguish the end faces with high roughness requirements, both ends of this part are designed with relatively high roughness requirements. In addition, the parallelism of the two side end faces of the pressure pad is 0.02mm. For the force-applying and pressure-bearing end face, to ensure that when the bolt is tightened, the pressure on the bearing seat is not eccentric along its axial direction.

[0027] Generally, the positioning rod uses a bolt, and the locking part uses a nut. The nut part of the bolt serves as the end cap. In an alternative embodiment, the bolt includes a smooth rod section 6 and a threaded section 7. The threaded section is used to connect the locking part, while the smooth rod section can cooperate with the pressure sleeve to ensure the structural stability between the pressure sleeve and the positioning rod. The pressure sleeve includes a pressing plate part and a sleeve part. The sleeve part faces the side of the end cap, and a positioning rod through hole 8 is provided on the pressing plate part. Preferably, the positioning rod and the positioning rod through hole are in sliding fit.

[0028] In an alternative embodiment, chamfer structures 9 are provided at both ends of the positioning rod through hole on the pressing plate part. When the positioning rod penetrates into the positioning rod through hole of the pressure sleeve, the chamfer structure of the sleeve part can reduce the friction between the sleeve part and the positioning rod. In addition, chamfer structures are also provided at the inner wall of the end of the sleeve part to ensure that the pressure sleeve and the tool are properly matched. A positioning rod through hole 10 is provided on the pressure pad, and chamfer structures are provided at both ends of the positioning rod through hole.

[0029] The structure of the present invention is simple and the operation is convenient. The pressure sleeve and the extended end of the bearing seat of the idler wheel component are in clearance fit. After the pressure sleeve is locked by the locking part, the pressure pad supports the end face of the bearing seat. By applying this tooling, the rotational flexibility of the idler wheel component can be checked according to the force-applying state of the whole machine assembly before the whole machine assembly, which can effectively improve the functional qualification rate of the idler wheel component after assembly, reduce the proportion of the idler wheel component that cannot rotate flexibly after the whole machine assembly is completed, and improve the assembly efficiency of the whole diesel engine.

[0030] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool, characterized in that: It includes a positioning rod, one end of which is provided with an end cap and the other end is provided with a pressing sleeve, and the pressing sleeve is locked by a locking piece on the positioning rod. At the same time, a pressing pad is provided on the side of the end cap facing the pressing sleeve, and the end surfaces on both sides of the pressing pad are parallel, and the end surfaces on both sides of the pressing sleeve are parallel; the pressing sleeve includes a pressing plate part and a sleeve part, the sleeve part faces the end cap, and a positioning rod penetration hole is provided on the pressing plate part.

2. A high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool according to claim 1, characterized in that: The positioning rod is a bolt.

3. The high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool according to claim 1, characterized in that: The locking piece is a nut.

4. The high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool according to claim 1, characterized in that: The parallelism of the end surfaces on both sides of the pressure pad is 0.02mm.

5. The high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool according to claim 1, characterized in that: The roughness of the two end surfaces of the pressure pad is 0.8um.

6. The high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool according to claim 1, characterized in that: A chamfered structure is provided on the inner wall of the end of the sleeve portion.

7. The high-speed, high-power diesel engine dual-bearing idler wheel component inspection tool according to claim 1, characterized in that: The positioning rod is slidably matched with the hole through which the positioning rod is penetrated.

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