Adjustable wheel axle mechanism

Abstract

The present invention provides an adjustable wheel-axle mechanism, including a mother shaft and a first support sleeve, a No. 1 main journal module, an interval support sleeve, a No. 2 main journal module, a second support sleeve, a first cam module, an intermediate support sleeve, a second cam module, a third support sleeve, a No. 3 main journal module and a locking nut, the mother shaft is provided with a long keyway, the long keyway is used to install a positioning key, and the positioning key plays a limiting role on the components sleeved on its outside. The adjustable wheel-axle mechanism described in the present invention realizes the flexible replacement and phase adjustment of the test engine valve shaft cam through the mother shaft, the positioning long key, the cam module, the journal module and other parts. For different cam profiles and phases, only different active cams need to be processed, and there is no need to process the mother shaft again, which improves the repairability and replaceability of the test engine valve mechanism.

Description

Technical Field

[0001] The invention belongs to the new technical field of engines, and in particular relates to an adjustable wheel axle mechanism. Background Art

[0002] The design of the valve cam profile not only directly affects the engine's ventilation and combustion process, but also has a great impact on the vibration, noise and wear of the valve mechanism. Especially under high-speed conditions, unreasonable valve cam profiles can cause valve "flying off" and "rebounding", seriously damaging the ventilation process and accelerating the wear of parts. Through the optimization of the valve cam profile, the valve mechanism can obtain a larger face value or fullness coefficient, thereby improving the engine's charging efficiency and improving fuel economy. The traditional engine valve camshaft integrates the support shaft and the cam into one, with structural integration and strong reliability, but the biggest disadvantage of the integrated valve camshaft is that one valve camshaft can only correspond to one cam profile. In the early development of the engine, the ventilation process test must be carried out for different cam profiles. If a new valve cam profile is to be replaced, the valve camshaft needs to be processed again. In addition to machining, the processing process of the valve camshaft also includes a series of complex processes such as heat treatment, which greatly increases the economic cost and time cost of the test. Summary of the invention

[0003] In view of this, the present invention aims to propose an adjustable wheel axle mechanism to solve the technical problem that the integrated structure cannot change the cam profile and the oil supply and valve timing phase angles.

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

[0005] An adjustable wheel axle mechanism comprises a mother shaft and a first support sleeve, a No. 1 main shaft neck module, an interval support sleeve, a No. 2 main shaft neck module, a second support sleeve, a first cam module, an intermediate support sleeve, a second cam module, a third support sleeve, a No. 3 main shaft neck module and a locking nut, the mother shaft is provided with a long keyway, the long keyway is used to install a positioning key, and the positioning key plays a role in limiting the components sleeved on the outside.

[0006] Furthermore, the female shaft includes a connecting section and an installing shaft section, a step is formed at the intersection of the connecting section and the installing shaft section after they are connected, a spline tooth groove is provided at the end of the connecting section, a symmetrically positioned installing plane is provided on the connecting section, a lubricating oil channel hole outlet and a long key groove are provided on the installing shaft section, a plurality of positioning keys are installed in the long key groove, and the positioning keys are connected end to end; a tightening thread and an internal oil channel hole are provided at the end of the installing shaft section.

[0007] Furthermore, the positioning key is a long rectangular key.

[0008] Furthermore, the first cam module and the second cam module are completely identical, the first cam module is provided with a cam keyway and a cam inner hole interconnected with each other, the cam inner hole is sleeved on the outside of the mounting shaft section, the cam keyway is used to embed a positioning key, and the two cooperate to play a limiting role.

[0009] Furthermore, the No. 1 main journal module is the same as the No. 2 main journal module. The No. 1 main journal module is a cylindrical shell structure with a journal hole inside. The journal hole is sleeved on the outside of the mounting shaft section. The journal hole is circumferentially provided with a journal keyway for embedding a positioning key. The two cooperate to play a limiting role.

[0010] Furthermore, the first support sleeve, the interval support sleeve, the second support sleeve, the middle support sleeve and the third support sleeve are the same. The middle support sleeve is a cylindrical structure, and a support keyway is provided on the cylinder wall. The support keyway is used to embed the positioning key, and the two cooperate to play a limiting role. The support hole of the middle support sleeve is used to be sleeved on the outside of the shaft neck keyway.

[0011] Compared with the prior art, the adjustable wheel axle mechanism of the present invention has the following advantages:

[0012] (1) The adjustable wheel axle mechanism described in the present invention can realize the flexible replacement and phase adjustment of the test engine valve shaft cam through the mother shaft, positioning long key, cam module, journal module and other components. For different cam profiles and phases, only different movable cams need to be processed, and there is no need to process the mother shaft again, thereby improving the repairability and replaceability of the test engine valve mechanism.

[0013] (2) The adjustable wheel axle mechanism described in the present invention has the characteristics of simple processing, installation and easy troubleshooting, which reduces the economic cost and economic cost in testing or product development.

[0014] (3) The adjustable wheel axle mechanism described in the present invention can realize the flexible replacement and phase adjustment of the cam and support journal of the test engine camshaft. For the test valve camshaft system, it is only necessary to process different cam modules to achieve the adjustment of the profile and phase, which greatly reduces the time cost and economic cost during the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0016] Figure 1 This is a schematic diagram of an adjustable wheel axle mechanism according to an embodiment of the present invention;

[0017] Figure 2 A schematic diagram of a female shaft according to an embodiment of the present invention;

[0018] Figure 3 A schematic diagram of a positioning key according to an embodiment of the present invention;

[0019] Figure 4 is a schematic diagram of a first cam module according to an embodiment of the present invention;

[0020] Figure 5 A schematic diagram of a locking nut according to an embodiment of the present invention;

[0021] Figure 6 is a schematic diagram of a No. 1 main journal module according to an embodiment of the present invention;

[0022] Figure 7 It is a schematic diagram of the intermediate support sleeve described in an embodiment of the present invention.

[0023] Description of reference numerals:

[0024] 1-female shaft; 11-connecting section; 12-installing shaft section; 13-spline tooth groove; 14-installing plane; 15-lubricating oil channel hole outlet; 16-long keyway; 17-tightening thread; 18-inner oil channel hole; 2-locating key; 3-first cam module; 31-cam inner hole; 32-cam keyway; 4-locking nut; 5-No. 1 main shaft neck module; 51-outer wall; 52-shaft neck keyway; 53-shaft neck hole; 6-middle support sleeve; 61-support keyway; 62-support hole; 7-spacer support sleeve; 8-first support sleeve. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] An adjustable wheel axle mechanism, such as Figures 1 to 7 As shown, it includes a mother shaft 1 and the first support sleeve 8, the first main journal module 5, the interval support sleeve 7, the second main journal module, the second support sleeve, the first cam module 3, the intermediate support sleeve 6, the second cam module, the third support sleeve, the third main journal module and the locking nut 4 are sequentially sleeved from one end to the other end. The mother shaft 1 is provided with a long keyway 16, and the long keyway 16 is used to install the positioning key 2, and the positioning key 2 plays a limiting role on the components sleeved on its outside. The adjustable wheel shaft mechanism described in the present invention realizes the flexible replacement and phase adjustment of the test engine valve shaft cam through the mother shaft, the positioning long key, the cam module, the journal module and other parts. For different cam profiles and phases, only different active cams need to be processed, and there is no need to process the mother shaft again, which improves the repairability and replaceability of the test engine valve mechanism.

[0030] The female shaft 1 comprises a connecting section 11, a mounting shaft section 12, a spline tooth groove 13, a mounting plane 14, a lubricating oil passage hole outlet 15, a long keyway 16, a clamping thread 17 and an inner oil passage hole 18. After the connecting section 11 and the mounting shaft section 12 are installed, a step is formed at the intersection. The end of the connecting section 11 is provided with a spline tooth groove 13. The connecting section 11 is provided with a symmetrically positioned mounting plane 14. The mounting shaft section 12 is provided with a lubricating oil passage hole outlet 15 and a long keyway 16. The long keyway 16 is used to install a plurality of positioning keys 2, and the positioning keys 2 are connected end to end. The end of the mounting shaft section 12 is provided with a clamping thread 17 and an inner oil passage hole 18. Preferably, the number of positioning keys 2 installed in the long keyway 16 is 4.

[0031] The positioning key 2 is a rectangular long key, and the dimensions of both end faces match the distance between the inner end faces of the long keyway 16 on the mother shaft 1 . The key end face radius of the positioning key 2 matches the inner radius of the long keyway 16 .

[0032] The first cam module 3 is completely the same as the second cam module. The first cam module 3 is an independent module unit, the outer contour line corresponds to the lift curve, and the surface is finely ground by a cam grinder. The cam module 3 is provided with a cam keyway 32 and a cam inner hole 31 that are interconnected. The size of the cam inner hole 31 matches the outer circle size of the mounting shaft section 12 of the mother shaft 1. The cam inner hole 31 is fixedly sleeved on the outside of the mounting shaft section 12, and the inner end face distance of the cam keyway 32 corresponds to the outer size of the positioning key 2; the positioning key 2 is located inside the cam keyway 32, and the two cooperate to play a limiting role, that is, the cam inner hole 31 is fixedly sleeved on the outside of the mounting shaft section 12.

[0033] The specification of the inner hole thread of the locking nut 4 matches the compression thread of the end face of the female shaft 1 .

[0034] The No. 1 main journal module 5 is the same as the No. 2 main journal module. The No. 1 main journal module 5 is an independent module unit. The No. 1 main journal module 5 is a cylindrical shell structure with a journal hole 53 inside. The journal hole 53 is sleeved on the outside of the mounting shaft section 12. The journal hole 53 is circumferentially provided with a journal keyway 52. ​​The journal keyway 52 is used to embed the positioning key 2. The two cooperate to play a limiting role. Specifically, the inner end face distance of the journal keyway 52 corresponds to the outer size of the positioning key. The outer wall 51 of the No. 1 main journal module 5 is surface-finished by a cam grinder, and the inner hole size of the main journal module 5 matches the outer circle size of the mounting shaft section 12 of the mother shaft 1.

[0035] The first support sleeve 8, the interval support sleeve 7, the second support sleeve, the middle support sleeve 6 and the third support sleeve are the same. The middle support sleeve 6 is a cylindrical structure, and a support keyway 61 is provided on the cylinder wall. The support keyway 61 is used to embed the positioning key 2, and the two cooperate to play a limiting role. The support hole 62 of the middle support sleeve 6 is used to be sleeved on the outside of the journal keyway 52.

[0036] An installation method of an adjustable wheel axle mechanism is as follows:

[0037] First, fix the mother shaft 1 through the horizontal end face of the shaft neck adjacent to the end face of the shaft head, apply clean engine oil on the surface of the positioning key 2, and then install the positioning key 2 coated with lubricating engine oil into the long keyway 16 of the mother shaft 1. The positioning keys 2 are installed in sequence end to end, and one mother shaft 1 needs to be installed with four positioning keys 2; then, through the positioning slot hole and the positioning key 2, the first support sleeve 8, the No. 1 main shaft neck module 5, the interval support sleeve 7, the No. 2 main shaft neck module, the second support sleeve, the first cam module 3, the intermediate support sleeve 6, the second cam module, the third support sleeve, the No. 3 main shaft neck module and the locking nut 4 are installed in sequence. Finally, use the corresponding tightening tool to tighten the locking nut 4 according to the specified tightening torque until all the modules, sleeves and other parts on the mother shaft 1 are tightened, and use a marker to mark the end face of the tightening nut 4 and the corresponding end face of the mother shaft 1. At this point, the entire installation of an adjustable wheel axle mechanism is completed.

[0038] Note: For fixing methods not explicitly stated in the text, common fixing connection methods such as threaded connection, bonding or welding can be selected as needed.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable wheel axle mechanism, characterized in that: It includes a mother shaft and a first support sleeve, a No. 1 main journal module, an interval support sleeve, a No. 2 main journal module, a second support sleeve, a first cam module, an intermediate support sleeve, a second cam module, a third support sleeve, a No. 3 main journal module and a locking nut, and a long keyway is provided on the mother shaft, and the long keyway is used to install a positioning key, and the positioning key plays a limiting role on the components sleeved outside it; The female shaft comprises a connecting section and an installation shaft section. A step is formed at the intersection of the connecting section and the installation shaft section after they are connected. A spline tooth groove is provided at the end of the connecting section. A symmetrical installation plane is provided on the connecting section. A lubricating oil passage hole outlet and a long keyway are provided on the installation shaft section. A plurality of positioning keys are installed in the long keyway, and the positioning keys are connected end to end. A clamping thread and an internal oil passage hole are provided at the end of the installation shaft section. The positioning key is a rectangular long key; The first cam module and the second cam module are completely identical. The first cam module is provided with a cam keyway and a cam inner hole which are interconnected. The cam inner hole is sleeved on the outside of the mounting shaft section. The cam keyway is used to embed a positioning key. The two cooperate to play a limiting role.

2. The adjustable wheel axle mechanism according to claim 1, characterized in that: The No. 1 main shaft neck module is the same as the No. 2 main shaft neck module. The No. 1 main shaft neck module is a cylindrical shell structure with a shaft neck hole inside. The shaft neck hole is sleeved on the outside of the mounting shaft section. A shaft neck keyway is provided circumferentially of the shaft neck hole. The shaft neck keyway is used to embed a locating key. The two cooperate to play a limiting role.

3. The adjustable wheel axle mechanism according to claim 1, characterized in that: The first support sleeve, the interval support sleeve, the second support sleeve, the middle support sleeve and the third support sleeve are the same. The middle support sleeve is a cylindrical structure, and a support keyway is provided on the cylinder wall. The support keyway is used to embed the positioning key, and the two cooperate to play a limiting role. The support hole of the middle support sleeve is used to be sleeved on the outside of the shaft neck keyway.

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