Combination structure of double-spark-plug engine and frame

Abstract

The utility model provides a combined structure of a double-spark-plug engine and a frame, which comprises an engine and a frame structure, and the engine is provided with double spark plugs; the frame structure is composed of a head pipe and two auxiliary pipes, and an accommodating space for accommodating the engine is formed between the two auxiliary pipes. The front section part of each auxiliary pipe extends from the front end of the middle section part in a forward inclining mode, the rear section part extends from the rear end of the middle section part in a backward inclining mode, the head pipe is fixed to the tops of the two front section parts, and when the two auxiliary pipes form the frame structure, the two front section parts can be close to each other. The combined structure of the double-spark-plug engine and the frame can be composed of the head pipe and the two auxiliary pipes, the double-pipe structure composed of the two front section parts has good structural stability, and stable and good combustion efficiency can be achieved by igniting through the double spark plugs.

Description

Technical Field

[0001] The present invention relates to a frame structure of a locomotive, and more particularly to a combined structure of a double spark plug engine and a frame. Background Art

[0002] The frame structure of a conventional locomotive is generally composed of a main tube, two sub-tubes and a keel tube. The keel tube is fixedly connected between the main tube and the two sub-tubes, and the keel tube cooperates with the main tube to connect the handlebar for the locomotive to turn.

[0003] However, the structure of the keel tube is different from that of the two sub-tubes, and the keel tube and the two sub-tubes are three separate and indispensable components. The two sub-tubes are fixedly connected to both sides of the keel tube by welding or the like. Therefore, there is a problem that the components of the existing locomotive frame structure are difficult to be omitted, and the fixing process of the two sub-tubes and the keel tube is also difficult to be simplified. Thus, it is difficult to save the component cost and the manufacturing cost of the existing locomotive frame structure. Moreover, since there is only one keel tube and it is a tube body, there is a concern of insufficient support when connecting the handlebar in cooperation with the main tube.

[0004] Therefore, how to solve the problems of the existing locomotive frame structure is the main focus of the present utility model. Summary of the Utility Model

[0005] To solve the above problems, the inventor has painstakingly studied and developed a combined structure of a double spark plug engine and a frame. The frame can be composed of a main tube and two sub-tubes, and is provided with a double spark plug engine. The double-tube structure formed by the two front sections of the frame has good structural stability.

[0006] The present utility model provides a combined structure of a double spark plug engine and a frame, including an engine and a frame structure. The engine includes a cylinder head and a cylinder cover, and two spark plugs for igniting the cylinder are provided on the cylinder head; the frame structure is composed of a main tube and two sub-tubes, and a receiving space is formed between the two sub-tubes. The engine can be hung on the frame structure and received in the receiving space; wherein each sub-tube is an integral structure and includes a front section, a middle section and a rear section. The front section extends forward from a front end of the middle section, and the rear section extends backward from the rear end of the middle section. The front section has a top at an end far from the middle section, and the main tube is fixed on the tops of the two front sections; when the two sub-tubes form the frame structure, the two front sections are close to each other.

[0007] In one embodiment, the two front sections can be close to each other and have a gap therebetween without contacting each other.

[0008] In one embodiment, the two front sections can be close to each other and in contact with each other without a gap.

[0009] In one embodiment, the two secondary tubes are mirror structures of each other and are symmetrically arranged to form the frame structure.

[0010] In one embodiment, the two secondary tubes are asymmetrically arranged with different pipe diameters and different thicknesses to form the frame structure.

[0011] In one embodiment, the two front portions are arranged side by side, each front portion has a bottom and a top located at different ends, and each front portion is straight between the bottom and the top.

[0012] In one embodiment, the gap is consistent between the bottoms and the tops of the two front portions.

[0013] In one embodiment, it further includes a fixing member, and the fixing member is fixedly arranged on the two front portions to keep the two front portions maintain the gap and be fixed.

[0014] In one embodiment, the two tops of the two front portions are conical and symmetrically tapered on the opposite outer sides.

[0015] In one embodiment, the two tops of the two front portions are symmetrically concave inward on the opposite inner sides to form an interface, and the main tube is connected to the interface at the middle portion.

[0016] In one embodiment, it further includes a support member, and the support member is fixedly arranged on the two front portions to support and connect the bottom of the main tube.

[0017] In one embodiment, it further includes a connecting member, and the connecting member is connected below the two middle portions to fix the distance between the two middle portions.

[0018] In one embodiment, the engine is a single cylinder, and two spark plugs are used to ignite the cylinder.

[0019] Thus, for the combined structure of the double spark plug engine and the frame of the present invention, the frame can be composed of the main tube and two secondary tubes, which is beneficial to saving the component cost and the manufacturing process cost. Moreover, the double-tube structure formed by the two front portions has good structural stability and can provide sufficient support for the handlebar. Furthermore, the engine of the present invention is configured with double spark plugs, especially when used in a single-cylinder engine, it can provide double ignition effect, enabling the engine to achieve stable and good combustion efficiency. Description of the Drawings

[0020] To further understand the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention. It should be understood that the provided drawings are only for reference and illustration, and are not used to limit the present invention.

[0021] Figure 1 It is a three-dimensional external view of the combined structure of a double spark plug engine and a frame according to an embodiment of the present utility model.

[0022] Figure 2 For Figure 1 It is a side view of the inside of the cylinder head as viewed along the section line 2-2.

[0023] Figure 3 It is a side view of the combined structure of a double spark plug engine and a frame according to an embodiment of the present utility model.

[0024] Figure 4 It is a top view of the frame structure according to an embodiment of the present utility model.

[0025] Figure 5 It is an exploded view of a partial front side of the frame structure according to an embodiment of the present utility model.

[0026] Figure 6 It is a front view of two sub-tubes of the frame structure according to an embodiment of the present utility model.

[0027] Figure 7 It is a rear view of two sub-tubes of the frame structure according to an embodiment of the present utility model.

[0028] Figure 8 It is an enlarged front view of two front end portions of the frame structure according to an embodiment of the present utility model.

[0029] Figure 9 It is an enlarged top view of two front end portions of the frame structure according to an embodiment of the present utility model.

[0030] Figure 10 It is a three-dimensional external view of the frame structure marked with test points according to an embodiment of the present utility model. Detailed implementation manners

[0031] To fully understand the purpose, features and effects of the present utility model, the present utility model will be described in detail through the following specific embodiments and in conjunction with the attached drawings, as follows.

[0032] As Figures 1 to 10 shown, the present utility model provides a combined structure 100 of a double spark plug engine and a frame, which is mainly applied to a motorcycle (not shown in the figure). In the following embodiments, the motorcycle is a Scooter, but the present utility model is not limited thereto. Any two-wheeled or more vehicle with a frame structure similar to that described in the following embodiments belongs to the scope of the motorcycle referred to in the present utility model.

[0033] The combined structure 100, as Figure 1 shown, includes an engine 200 and a frame structure 300. Further cooperating with Figure 2 shown, the engine 200 includes a cylinder head 201 and a cylinder cover 202. The cylinder head 201 is provided with two spark plugs 203 for igniting the cylinder 204; in one embodiment, the engine 200 is taken as a single-cylinder engine as an example.

[0034] The frame structure 300, as Figure 1 shown, includes a head tube 10 and two sub-tubes 20. The head tube 10 and the two sub-tubes 20 are circular tubes in one embodiment. When the two sub-tubes 20 form the frame structure 300, the two sub-tubes 20 are mirror structures of each other and are symmetrically arranged to form the frame structure 300 (and refer to Figure 4 , Figures 6 to 7 ). Again, as Figure 1 shown, a receiving space S is formed between the two sub-tubes 20. The engine 200 can be hung on the frame structure 300 and is received in the receiving space S. In one embodiment, the two sub-tubes 20 can also be asymmetrically arranged with different pipe diameters and different thicknesses (not shown in the figure) to form the frame structure 300, that is, the present invention is not limited to the two sub-tubes 20 being mirror structures of each other and symmetrically arranged.

[0035] As Figures 3 to 4 shown, each sub-tube 20 is an integral structure and includes a front section 21, a middle section 22, and a rear section 23. The middle section 22 has a front end 221 and a rear end 222. The front section 21 extends forward from the front end 221 of the middle section 22, and the rear section 23 extends backward from the rear end 222 of the middle section 22.

[0036] In one embodiment, as Figures 5 to 7 shown, the front section 21 has a bottom 211 and a top 212. The bottom 211 is located at one end of the front section 21 close to the middle section 22, and the top 212 is located at one end of the front section 21 away from the middle section 22. The head tube 10 is fixed to the tops 212 of the two front sections 21. In one embodiment, when the two sub-tubes 20 form the frame structure 300, and referring to Figures 8 to 9 shown, the two front sections 21 are close to each other, and the two front sections 21 are spaced apart by a gap G so that the two front sections 21 do not contact each other, but the present invention is not limited thereto. When the two front sections 21 are close to each other, they can also be in contact without a gap G (not shown in the figure).

[0037] In one embodiment, the two front sections 21 are arranged side by side. The bottom 211 and the top 212 of each front section 21 are located at different ends. Each front section 21 is straight between the bottom 211 and the top 212 (seeFigure 6 and Figure 7 )。Moreover, when there is a gap G between the two front end portions 21 and the two front end portions 21 do not contact each other, the gap G is consistent between the bottom 211 and the top 212 of the two front end portions 21.

[0038] In one embodiment, as Figure 3 , Figure 4 , Figure 6 and Figure 7 shown, each rear end portion 23 includes a first straight section 231, a second straight section 232, a third straight section 233, and a fourth straight section 234. The first straight section 231 and the second straight section 232 are connected by a first curved section 235. The second straight section 232 and the third straight section 233 are connected by a second curved section 236. The third straight section 233 and the fourth straight section 234 are connected by a third curved section 237. Again, as Figure 4 shown, the first straight sections 231 of the two auxiliary pipes 20 are slightly parallel to each other. Then, the two second straight sections 232 extend along the connected first curved section 235 and are slightly expanded outward. Then, the two third straight sections 233 extend along the connected second curved section 236 and are slightly contracted inward. Finally, the two fourth straight sections 234 extend along the connected third curved section 237 and are further contracted inward. The rear end portions 23 of the two auxiliary pipes 20 thereby form a receiving space S.

[0039] In one embodiment, the frame structure 300 further includes a fixing member 30. The fixing member 30 is fixedly arranged on the two front end portions 21 so that the two front end portions 21 maintain the gap G and are fixed. As Figure 5 shown, the fixing member 30 is a wavy structure here and forms two notches 31. The curvature of the two notches 31 is the same as the outer circumference of the front end portion 21. When the fixing member 30 is used to be fixedly arranged on the two front end portions 21, the two notches 31 respectively abut against the front end portions 21. The fixing member 30 is then fixed to the front end portion 21 by a fixing component such as a screw, or fixed to the front end portion 21 by welding, for example.

[0040] In one embodiment, the two tops 212 are tapered and symmetrically tapered on the opposite outer sides, and the two tops 212 of the two front end portions 21 are symmetrically concave inward on the opposite inner sides to form an interface 24. The head tube 10 is connected to the interface 24 at the middle portion. In one embodiment, the frame structure 300 further includes a support member 40. The support member 40 has a notch 41. The support member 40 faces the two front end portions 21 with the notch 41, so that the support member 40 abuts against the two front end portions 21 and is fixedly arranged. The support member 40 is then fixed to the front end portion 21 by a fixing component such as a screw, or fixed to the front end portion 21 by welding, for example, to support and connect the bottom of the head tube 10.

[0041] In one embodiment, it further includes a connecting member 50 which is connected below the two middle sections 22 to keep the distance between the two auxiliary pipes 20 fixed, especially to fix the middle sections 22.

[0042] It is not difficult to find the characteristics of the present utility model from the above description. The combined structure 100 of the double spark plug engine and the vehicle frame of the present utility model has a vehicle frame structure 300 which can be composed of a head pipe 10 and two auxiliary pipes 20. Compared with the combined structure of the existing double spark plug engine and the vehicle frame that must be provided with a keel pipe, the combined structure 100 of the double spark plug engine and the vehicle frame of the present utility model can omit the keel pipe, so it is beneficial to save the component cost and manufacturing cost of the keel pipe. Furthermore, compared with the combined structure of the existing double spark plug engine and the vehicle frame with only one keel pipe, the vehicle frame structure 300 of the present utility model has two front sections 21 arranged side by side on the front side of the vehicle frame structure 300, forming a double pipe structure on the front side of the vehicle frame structure 300. Thereby, it can provide good structural stability on the front side of the vehicle frame structure 300 and can achieve sufficient supporting effect on the installed faucet (not shown in the figure). Moreover, the engine 200 of the present utility model has two spark plugs 203. The double spark plugs 203 paired with a single cylinder engine can provide double ignition effect, enabling the engine to achieve stable and good combustion efficiency.

[0043] The vehicle frame structure 300 of the above embodiment is subjected to a stress test. For example, under the condition of applying a force of 1000 Newtons (N) in the vertical direction for 1 second, as Figure 10 shown, the vertical force measurement of the vehicle frame structure 300 is carried out at test point A, test point B, test point C and test point D. Among them, the stress value measured at test point A is 45.178 MPa, the stress value measured at test point B is 34.486 MPa, the stress value measured at test point C is 46.969 MPa, and the stress value measured at test point D is 55.767 Mpa. Then, a longitudinal strength analysis is carried out on the vehicle frame structure 300. Under the same condition of applying a force of 1000 Newtons (N) (longitudinal) for 1 second, the stress value measured at test point E of the two front sections 21 is 41.734 MPa. In addition, a lateral strength analysis is carried out on the vehicle frame structure 300. Under the same condition of applying a force of 1000 Newtons (N) (lateral) for 1 second, the stress value measured at test point E of the two front sections 21 is 40.021 MPa.

[0044] Compared with the frame structure of the existing locomotive, for its keel tube with only one tube body, longitudinal strength analysis and lateral strength analysis are carried out at the same position of the test point E under the same conditions. The stress value measured by the longitudinal strength analysis is 60.689 MPa, while the stress value measured by the lateral strength analysis is 77.84 MPa. Comparing with the frame structure 300 of the present invention, the stress values in the longitudinal strength analysis and the lateral strength analysis are higher.

[0045] As shown in Table 1, further measure the longitudinal deformation of the frame structure 300 of the embodiment of the present invention. The obtained longitudinal rigid deformation is 0.43 mm, while the longitudinal rigid deformation of the frame structure of the existing locomotive is 1.09 mm; then measure the lateral rigid deformation of the frame structure 300, and the obtained lateral rigid deformation is 1.07 mm, while the lateral rigid deformation of the frame structure of the existing locomotive is 1.72 mm. In other words, the frame structure 300 of the embodiment of the present invention has a smaller longitudinal rigid deformation and lateral rigid deformation than the frame structure of the existing locomotive.

[0046] Table 1:

[0047] Longitudinal rigid deformation amount (mm) Lateral rigid deformation amount (mm) Frame structure of the embodiment of the present utility model 0.43 1.07 Frame structure of the existing locomotive 1.09 1.72

[0048] Therefore, the results of the above tests can prove that the frame structure of the present invention, compared with the frame structure of the existing locomotive, especially the double-tube structure composed of two front parts 21, not only has low stress and no stress concentration, but also has the effect of low deformation. This shows that the frame structure 300 of the present invention does have good structural stability, and the double-tube structure composed of two front parts 21 can indeed provide sufficient support for the installed faucet.

[0049] The present invention has been disclosed in the above with preferred embodiments. However, those skilled in the art should understand that the embodiments are only used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be noted that all equivalent changes and substitutions to the embodiments should be considered as covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be defined by the claims.

Claims

1. A combination structure of a dual spark plug engine and a vehicle frame, characterized in that: include: The engine comprises a cylinder head and a cylinder cover, wherein the cylinder head is provided with two spark plugs for igniting the cylinders; as well as A frame structure, consisting of a head pipe and two side pipes, wherein a receiving space is formed between the two side pipes, and the engine can be hung on the frame structure and received in the receiving space; Among them, each of the auxiliary tubes is an integrated structure and includes a front section, a middle section and a rear section. The front section extends forward from the front end of the middle section, and the rear section extends backward from the rear end of the middle section. The front section has a top at an end away from the middle section, and the head tube is fixed to the tops of the two front sections. When the two auxiliary tubes constitute the frame structure, the two front sections are close to each other.

2. The combined structure of a dual spark plug engine and a vehicle frame according to claim 1, characterized in that: The two front sections are close to each other and are spaced apart from each other with a gap without contacting each other.

3. The combined structure of a dual spark plug engine and a vehicle frame according to claim 2, characterized in that: The two auxiliary pipes are mirror structures and are symmetrically arranged to form the frame structure.

4. The combined structure of a dual spark plug engine and a vehicle frame according to claim 3, characterized in that: The two front sections are arranged side by side, each of the front sections has a bottom and a top located at two different ends, and each of the front sections is straight between the bottom and the top.

5. The combined structure of a dual spark plug engine and a vehicle frame according to claim 4, characterized in that: The gap is consistent between the bottom and the top of the two front sections.

6. The combined structure of a dual spark plug engine and a vehicle frame according to claim 5, characterized in that: It further comprises a fixing member, wherein the fixing member is fixedly arranged on the two front sections so that the two front sections are fixed while maintaining the gap.

7. The combined structure of a dual spark plug engine and a vehicle frame according to claim 3, characterized in that: The two tops of the two front sections are conical and symmetrically tapered at opposite outer sides.

8. The combined structure of a dual spark plug engine and a vehicle frame according to claim 7, characterized in that: The two tops of the two front sections are symmetrically concave on the inner sides facing each other to form an interface, and the middle part of the head pipe is connected to the interface.

9. The combined structure of a dual spark plug engine and a vehicle frame according to claim 8, characterized in that: It further comprises a support member, which is fixedly arranged on the two front sections to supportively connect the bottom of the head pipe.

10. The combined structure of a dual spark plug engine and a vehicle frame according to claim 1, characterized in that: It further comprises a connecting piece, which is connected below the two middle sections to fix the distance between the two middle sections.

11. The combined structure of a dual spark plug engine and a vehicle frame according to claim 1, characterized in that: The engine has a single cylinder, and two spark plugs are used to ignite the cylinder.

12. The combined structure of a dual spark plug engine and a vehicle frame according to claim 1, characterized in that: The two front sections are close to each other and in contact with each other without any gap.

13. The combined structure of a dual spark plug engine and a vehicle frame according to claim 1, characterized in that: The two auxiliary pipes are asymmetrically arranged with different pipe diameters and different thicknesses to form the frame structure.

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