Head tube, machining method thereof and vehicle

Abstract

The invention belongs to the technical field of vehicles, and discloses a vehicle head pipe, a machining method thereof and a vehicle. A first mounting part is arranged at one end of the bicycle head pipe, a second mounting part is arranged at the other end of the bicycle head pipe, the bicycle head pipe is provided with a cavity, the first mounting part and the second mounting part communicate with the two ends of the cavity correspondingly, and an avoiding structure is further arranged on the bicycle head pipe; the bicycle head pipe comprises a first head pipe structure and a second head pipe structure which are symmetrically arranged, and the first head pipe structure and the second head pipe structure are fixedly connected. According to the bicycle head pipe, the bicycle head pipe is machined through the machining method that split forging is conducted and then welding is conducted, the wall thickness difference of the bicycle head pipe can be guaranteed, the use performance of the bicycle head pipe can be guaranteed, cost can be reduced, and economical efficiency can be improved. And the avoiding structure can avoid installation difficulty caused by insufficient installation space, and installation convenience is improved.

Description

Technical Field

[0001] The invention relates to the technical field of two-wheeled vehicles, and in particular to a vehicle front pipe and a processing method thereof, and a vehicle. Background Art

[0002] The front tube is an important component of two-wheeled vehicles such as bicycles. It is the most important load-bearing component in the frame structure and is also the key to determining the life and cost of the frame. In addition to the standard round straight tube structure, the front tube also has a triangular tapered structure. The lower port of the front tube is relatively thick, which can significantly improve the rigidity of the bicycle. Generally, the upper and lower ports of the front tube are required to be circular structures. The ports of the front tube are equipped with wear-resistant steel bowls or bearings with better rotation effects. From the initial ordinary cylindrical front tube to the tapered front tube and the shaped front tube with a shape, the tapered front tube will also use internal and external turning processes in the quasi-addition stage to meet the design appearance and wall thickness requirements. The shaped front tube will use relatively complex processes such as flaring, hard mold forming, and thermoplastic forming to achieve the design requirements of the front tube. With the diversification of styling designs, the process for turning head tubes is also constantly improving. For the design of head tubes with unequal wall thicknesses, the conventional process is liquid die forging core pulling. During liquid die forging core pulling, a large difference in wall thickness will occur, and the curved surface inside cannot be processed in one go, resulting in complicated processes and high processing costs.

[0003] Therefore, a vehicle head pipe and a processing method thereof, and a vehicle are needed to solve the above problems. Summary of the invention

[0004] The object of the present invention is to provide a vehicle front tube and a processing method thereof, and a vehicle. The vehicle front tube is processed by split forging and then welding, which can not only ensure the wall thickness difference of the vehicle front tube, ensure its performance and strength, but also reduce costs and improve economy.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A front tube, one end of which is provided with a first mounting portion, and the other end of which is provided with a second mounting portion, the front tube having a cavity, the first mounting portion and the second mounting portion being respectively connected with the two ends of the cavity, and the front tube is also provided with an avoidance structure;

[0007] Wherein, the vehicle head pipe comprises a first head pipe structure and a second head pipe structure which are symmetrically arranged, and the first head pipe structure and the second head pipe structure are fixedly connected.

[0008] As an optional technical solution, the front tube of the vehicle has a spindle-shaped structure.

[0009] As an optional technical solution, the first head pipe structure includes a first upper end, a first lower end and a first middle section, and the first upper end and the first lower end are respectively connected to the two ends of the first middle section; the second head pipe structure includes a second upper end, a second lower end and a second middle section, and the second upper end and the second lower end are respectively connected to the two ends of the second middle section, the first upper end and the second upper end are symmetrically arranged to form the first mounting portion, the first lower end and the second lower end are symmetrically arranged to form the second mounting portion, the first middle section and the second middle section are symmetrically arranged, and the wall thickness of the first middle section and the wall thickness of the second middle section are uniform and equal.

[0010] As an optional technical solution, a first recess is provided on the first middle section, and a second recess is provided on the second middle section, and the first recess and the second recess are smoothly connected to form the avoidance structure.

[0011] As an optional technical solution, the first upper end portion is provided with a first limiting protrusion and a first curved surface, the first limiting protrusion is provided at one end of the outer end surface of the first curved surface away from the first upper end portion, the second upper end portion is provided with a second limiting protrusion and a second curved surface, the second limiting protrusion is provided at one end of the outer end surface of the second curved surface away from the second upper end portion, the first limiting protrusion, the second limiting protrusion, the first curved surface and the second curved surface form the first mounting portion; and / or, the first lower end portion is provided with a third limiting protrusion and a third curved surface, the third limiting protrusion is provided at one end of the outer end surface of the third curved surface away from the first lower end portion, the second lower end portion is provided with a fourth limiting protrusion and a fourth curved surface, the fourth limiting protrusion is provided at one end of the outer end surface of the fourth curved surface away from the second lower end portion, the third limiting protrusion, the fourth limiting protrusion, the third curved surface and the fourth curved surface form the second mounting portion.

[0012] As an optional technical solution, the first header pipe structure and the second header pipe structure are connected by welding.

[0013] The present invention also adopts the following technical solutions:

[0014] A processing method, the processing method is used to process the vehicle head tube as described above, the processing method comprises the following steps:

[0015] S10, forging to obtain a first matrix and a second matrix;

[0016] S20, performing groove processing on the first substrate and the second substrate to form a first first pipe transition piece and a second first pipe transition piece;

[0017] S30, spot welding the first first pipe transition piece and the second first pipe transition piece;

[0018] S40, welding the first first pipe transition piece and the second first pipe transition piece to form a vehicle first pipe transition piece;

[0019] S50, grinding the vehicle head pipe transition piece;

[0020] S60, machining both ends of the vehicle head pipe transition piece to obtain the vehicle head pipe.

[0021] As an optional technical solution, before S20, the following steps are further included:

[0022] S19, machining the first substrate and the second substrate to ensure that the wall thickness of the middle section of the first substrate and the wall thickness of the middle section of the second substrate are within a preset range.

[0023] As an optional technical solution, the S30 specifically includes:

[0024] The first first pipe transition piece and the second first pipe transition piece are buckled to form a first butt joint and a second butt joint, and a welding gun is used to spot weld the first butt joint and the second butt joint from both ends to the middle in sequence, and the spot welding of the first butt joint and the second butt joint is performed alternately.

[0025] As an optional technical solution, the S40 specifically includes:

[0026] S41, selecting a first starting point at the first butt joint or the second butt joint to start welding, welding one circle in any direction to form a first weld, and grinding the first weld;

[0027] S42, selecting a second starting point at the first butt joint or the second butt joint to start welding, welding one circle in any direction to form a second weld, and grinding the second weld.

[0028] The present invention also adopts the following technical solutions:

[0029] A vehicle, comprising a front fork structure, the front fork structure comprising a front fork body and a cross fork, the front fork body and the cross fork being arranged at an angle, the vehicle also comprising a head tube as described above, the head tube being fixedly connected to both the front fork body and the cross fork.

[0030] Beneficial effects of the present invention:

[0031] The present invention discloses a front tube of a vehicle, wherein a first mounting portion is provided at one end of the front tube of the vehicle, and a second mounting portion is provided at the other end of the front tube of the vehicle, the front tube of the vehicle has a cavity, the first mounting portion and the second mounting portion are respectively connected to the two ends of the cavity, and an avoidance structure is also provided on the front tube of the vehicle; the front tube of the vehicle comprises a first front tube structure and a second front tube structure which are symmetrically arranged, and the first front tube structure and the second front tube structure are fixedly connected. The front tube of the vehicle is processed by split forging and then welding, and its wall thickness difference of the front tube of the vehicle can be ensured to ensure its use performance, and the cost can be reduced to improve the economy. Moreover, the avoidance structure can avoid the installation difficulties caused by insufficient installation space, and improve the convenience of installation.

[0032] The present invention also discloses a processing method for processing the above-mentioned first tube of a vehicle, firstly, a first matrix and a second matrix are obtained by forging, and then the first matrix and the second matrix are machined to form a first tube transition piece and a second tube transition piece, and then the first tube transition piece and the second tube transition piece are spot welded, and then the first tube transition piece and the second tube transition piece are welded to form a first tube transition piece; then the first tube transition piece is ground, and finally both ends of the first tube transition piece are machined to form a first mounting part and a second mounting part to obtain the first tube of the vehicle. This processing method can ensure the wall thickness difference of the first tube of the vehicle, ensure its performance and strength, and can also reduce costs and improve economy.

[0033] The present invention also discloses a vehicle, which includes a front fork structure, which includes a front fork body and a cross fork arranged at an angle, and the vehicle also includes the above-mentioned vehicle head pipe, which is fixedly connected to the front fork body and the cross fork. By providing the vehicle head pipe, the vehicle can ensure the structural strength of the vehicle and improve the service life, and can also effectively reduce costs and improve economic efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a partial structural schematic diagram of a vehicle according to an embodiment of the present invention;

[0035] Figure 2 2 is a first structural schematic diagram of a vehicle head pipe according to an embodiment of the present invention;

[0036] Figure 3 2 is a second structural schematic diagram of the vehicle head pipe according to an embodiment of the present invention;

[0037] Figure 4 2 is a schematic diagram of the structure of the first header transition piece and the second header transition piece connected to each other in an embodiment of the present invention;

[0038] Figure 5 It is a flow chart of the processing method of an embodiment of the present invention.

[0039] In the figure:

[0040] 1. Front tube; 2. Front fork structure; 201. Front fork body; 202. Cross fork;

[0041] 10. first header structure; 11. first upper end; 12. first lower end; 13. first middle section; 131. first recess; 10a. first header transition piece;

[0042] 20. Second header structure; 21. Second upper end; 22. Second lower end; 23. Second middle section; 231. Second recess; 20a. Second header transition piece;

[0043] 30. First mounting portion; 31. First limiting boss; 32. First mounting hole;

[0044] 40. second mounting portion; 41. second limiting boss; 42. second mounting hole;

[0045] 50. Cavity; 60. First bevel; 70. Second bevel; 80. Threading hole; 90. Water outlet. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0050] like Figure 1 As shown, a vehicle is provided in this embodiment, the vehicle includes a front fork structure 2, the front fork structure 2 includes a front fork body 201 and a cross fork 202, the front fork body 201 and the cross fork 202 are arranged at an angle, and the vehicle also includes a vehicle head pipe 1, the vehicle head pipe 1 is fixedly connected to the front fork body 201 and the cross fork 202. Specifically, in this embodiment, the vehicle head pipe 1 of the vehicle is made by first performing split forging and then welding, and machining is performed before and after welding to ensure the wall thickness difference, which can ensure that the vehicle head pipe 1 has good mechanical strength, thereby improving the service life, and effectively reduce costs and improve the economy of the vehicle.

[0051] like Figures 2 to 4 As shown, in this embodiment, a front pipe 1 is also provided, one end of which is provided with a first mounting portion 30, and the other end of which is provided with a second mounting portion 40. The front pipe 1 has a cavity 50, and the first mounting portion 30 and the second mounting portion 40 are respectively connected to the two ends of the cavity 50, and a avoidance structure is also provided on the front pipe 1; wherein, the front pipe 1 includes a first front pipe structure 10 and a second front pipe structure 20 which are symmetrically arranged, and the first front pipe structure 10 and the second front pipe structure 20 are fixedly connected. Specifically, in this embodiment, the first mounting portion 30 and the second mounting portion 40 are respectively used to install a steel bowl or a bearing to ensure the performance of the front pipe 1, and the first mounting portion 30 and the second mounting portion 40 are respectively connected to the two ends of the cavity 50, which can facilitate threading. The vehicle front pipe 1 includes a first front pipe structure 10 and a second front pipe structure 20 which are symmetrically arranged and fixedly connected. The vehicle front pipe 1 is made by split forging and then welding. The first front pipe structure 10 and the second front pipe structure 20 can be machined separately, which can not only ensure the wall thickness difference to meet the strength requirements for use, but also reduce the processing difficulty, reduce the processing cost, and improve the economy.

[0052] Specifically, the front tube 1 in this embodiment is connected to the front fork body 201 and the cross fork 202 of the front fork structure 2 of the vehicle by welding. The front tube 1, the front fork body 201 and the cross fork 202 are arranged in a triangle. The avoidance structure of the front tube 1 can avoid when installing bolts on the front fork body 201 to ensure the installation space of the bolts, thereby improving the installation efficiency.

[0053] Furthermore, the front pipe 1 is in a spindle shape. Specifically, in this embodiment, the outer side surface of the first front pipe structure 10 and the outer side surface of the second front pipe structure 20 are smoothly transitioned, so that the front pipe 1 as a whole is in a spindle shape with a thick middle and thin ends, thereby improving the structural strength of the front pipe 1 and further improving the structural strength of the frame, thereby ensuring the service life of the vehicle.

[0054] Furthermore, if Figure 3 As shown, the first head pipe structure 10 includes a first upper end 11, a first lower end 12 and a first middle section 13, the first upper end 11 and the first lower end 12 are respectively connected to the two ends of the first middle section 13, the second head pipe structure 20 includes a second upper end 21, a second lower end 22 and a second middle section 23, the second upper end 21 and the second lower end 22 are respectively connected to the two ends of the second middle section 23, the first upper end 11 and the second upper end 21 are symmetrically arranged to form a first mounting portion 30, the first lower end 12 and the second lower end 22 are symmetrically arranged to form a second mounting portion 40, the first middle section 13 and the second middle section 23 are symmetrically arranged, and the wall thickness of the first middle section 13 and the wall thickness of the second middle section 23 are uniform and equal. Specifically, in this embodiment, the wall thickness of the first middle section 13 and the wall thickness of the second middle section 23 are uniform and equal, and the first middle section 13 and the second middle section 23 are symmetrically arranged to form a spindle-shaped inner cavity, thereby making the wall thickness of the middle section of the vehicle head pipe 1 uniform, ensuring the balance of the lifting force of the vehicle head pipe 1. In this embodiment, the wall thickness of the first mounting portion 30 and the second mounting portion 40 are both greater than the wall thickness of the middle section of the front tube 1 , which can further improve the structural strength and ensure the performance of the front tube 1 .

[0055] Furthermore, if Figure 2 As shown, a first recess 131 is provided on the first middle section 13, and a second recess 231 is provided on the second middle section 23. The first recess 131 and the second recess 231 are smoothly transitioned and connected to form an avoidance structure. Specifically, in this embodiment, this arrangement can ensure that the wrench has sufficient space for movement when the head tube 1 and the front fork structure 2 are installed, thereby improving the convenience of installation.

[0056] Specifically, Figure 2 As shown, in this embodiment, a first opening is provided on the first middle section 13, and the first opening is provided on a side of the first recess 131 close to the first upper end portion 11; a second opening is provided on the second middle section 23, and the second opening is provided on a side of the second recess 231 close to the second upper end portion 21; the first opening and the second opening are symmetrically arranged to form a threading hole 80 to facilitate wiring inside the tube and enhance the aesthetics of the vehicle.

[0057] Further, the first upper end portion 11 is provided with a first limiting protrusion and a first curved surface, the first limiting protrusion is provided at one end of the outer end surface of the first curved surface away from the first upper end portion 11, the second upper end portion 21 is provided with a second limiting protrusion and a second curved surface, the second limiting protrusion is provided at one end of the outer end surface of the second curved surface away from the second upper end portion 21, the first limiting protrusion, the second limiting protrusion, the first curved surface and the second curved surface form a first mounting portion 30; and / or, the first lower end portion 12 is provided with a third limiting protrusion and a third curved surface, the third limiting protrusion is provided at one end of the outer end surface of the third curved surface away from the first lower end portion 12, the second lower end portion 22 is provided with a fourth limiting protrusion and a fourth curved surface, the fourth limiting protrusion is provided at one end of the outer end surface of the fourth curved surface away from the second lower end portion 22, the third limiting protrusion, the fourth limiting protrusion, the third curved surface and the fourth curved surface form a second mounting portion 40.

[0058] Specifically, Figure 2 and Figure 3 As shown, in this embodiment, the first limiting protrusion and the second limiting protrusion form a first limiting boss 31, the first arcuate surface and the second arcuate surface form a first mounting hole 32, the first limiting boss 31 and the first mounting hole 32 form the above-mentioned first mounting portion 30, and the third limiting protrusion and the fourth limiting protrusion form a second limiting boss 41, the third arcuate surface and the fourth arcuate surface form a second mounting hole 42, the second limiting boss 41 and the second mounting hole 42 form the above-mentioned second mounting portion 40. In actual use, the first mounting portion 30 and the second mounting portion 40 can both be used to accommodate corresponding bearings, thereby ensuring the installation stability and position accuracy of the bearings.

[0059] In another embodiment, the first mounting portion 30 and / or the second mounting portion 40 may be corresponding structures for connecting the steel bowl, which will not be described in detail herein.

[0060] Specifically, in this embodiment, a first groove is provided on the first head pipe structure 10, and a second groove is provided on the second head pipe structure 20. The first groove and the second groove form a water outlet 90. The water outlet 90 is located on the side of the avoidance structure away from the first mounting portion 30, so that the cleaning water can be discharged easily when the head pipe of the vehicle is immersed in water.

[0061] Furthermore, the connection method of the first header structure 10 and the second header structure 20 is welding. Specifically, in this embodiment, the head tube 1 is processed by split forging and then welding, which can ensure the wall thickness difference of the head tube 1, ensure its performance, reduce costs, and improve economic efficiency. The avoidance structure can avoid installation difficulties caused by insufficient installation space and improve installation convenience.

[0062] like Figure 5As shown, this embodiment also provides a processing method for processing the above-mentioned front tube 1. The processing method includes the following steps.

[0063] S10: Forging to obtain a first matrix and a second matrix.

[0064] Specifically, in the present embodiment, the first substrate and the second substrate are obtained by forging, and the outer surface of the first substrate and the outer surface of the second substrate are the same, and can jointly form the spindle-shaped appearance structure of the front tube 1. This processing method does not require additional processing of the outer surface of the first substrate and the outer surface of the second substrate to obtain the appearance characteristics of the front tube 1 that meet the use requirements, thereby saving processing costs and improving processing efficiency.

[0065] S20, performing groove processing on the first substrate and the second substrate to form a first first pipe transition piece 10a and a second first pipe transition piece 20a.

[0066] Specifically, in this embodiment, groove processing is performed on the first substrate and the second substrate to ensure welding quality.

[0067] In this embodiment, the grooves on the first substrate and the second substrate specifically include a first groove 60 and a second groove 70. The first groove 60 is the groove located on the outside after the first substrate and the second substrate are connected, and the second groove 70 is the groove located on the inside after the first substrate and the second substrate are connected. The second groove 70 is located on the inner wall of the first upper end 11, the first lower end 12, the second upper end 21 and the second lower end 22.

[0068] Specifically, in this embodiment, the angles and widths of the first groove 60 and the second groove 70 are specifically set according to actual use, and will not be described in detail here.

[0069] Furthermore, before S20, the following contents are also included.

[0070] S19, machining the first substrate and the second substrate to ensure that the wall thickness of the middle section of the first substrate and the wall thickness of the middle section of the second substrate are within a preset range.

[0071] Specifically, in this embodiment, if the wall thickness of the first matrix and the second matrix obtained after forging is uneven, it is necessary to machine the inner surface of the first matrix and the inner surface of the second matrix to ensure the uniformity of the wall thickness of the front tube 1, thereby ensuring the load-bearing capacity of the front tube 1, improving its structural strength, and ensuring its service life.

[0072] S30, spot welding the first first pipe transition piece 10a and the second first pipe transition piece 20a.

[0073] Specifically, in this embodiment, spot welding the first head pipe transition piece 10a and the second head pipe transition piece 20a before welding can reduce welding deformation, thereby ensuring the quality and performance of the vehicle head pipe 1, and the welding efficiency is high.

[0074] Specifically, in this embodiment, the first first pipe transition piece 10a and the second first pipe transition piece 20a are buckled to form a first butt joint and a second butt joint, and a welding gun is used to perform spot welding on the first butt joint and the second butt joint. When spot welding, pay attention to spot welding from both ends of the vehicle head pipe 1 to the middle in sequence according to preset intervals, and when spot welding, the first butt joint and the second butt joint are spot welded alternately in sequence, which can avoid welding deformation, improve welding quality, and ensure the performance of the vehicle head pipe 1.

[0075] S40, welding the first head pipe transition piece 10a and the second head pipe transition piece 20a to form a vehicle head pipe transition piece.

[0076] Furthermore, S40 specifically includes the following steps.

[0077] S41, selecting a first starting point at the first butt joint or the second butt joint to start welding, welding one circle in any direction to form a first weld, and grinding the first weld.

[0078] Specifically, in the present embodiment, the two ends of the vehicle head tube 1 are subjected to great force, and conventional welding is prone to cracking. A robotic arm automatic welding method is adopted, and the two sides of the first head tube transition piece 10a and the second head tube transition piece 20a to be welded are facing outward, and the automatic welding gun arm is manually adjusted to ensure that the distance from the welding gun tungsten wire to the arc surface formed by the first head tube transition piece 10a and the second head tube transition piece 20a is 2-3mm, and the welding gun moves along the butt joint formed by the first head tube transition piece 10a and the second head tube transition piece 20a for one circle. Note that the welding current is slowly increased from the minimum value, and the welding current is controlled at 150-200A, which can prevent the problem of welding penetration caused by the instantaneous large current breakdown of the tube wall when the tube wall is relatively thin; and in the present embodiment, in order to prevent the end face weld from cracking easily, the starting end of the second groove 70 on the inner side of the end face is used as the first starting point to start welding, and then the welding is stopped at the end of the second groove 70 on the inner side of the end face of the other side of the vehicle head tube 1 to form a first weld, and then the first weld is polished.

[0079] In another embodiment, the welding parameters can be specifically set according to actual conditions, which will not be elaborated here.

[0080] S42, selecting a second starting point at the first butt joint or the second butt joint to start welding, welding one circle in any direction to form a second weld, and grinding the second weld.

[0081] Specifically, in this embodiment, the welding process includes two weldings to ensure welding strength. After the first welding is completed, a second welding is required, and the second starting point selected during the second welding is different from the first starting point, and the second starting point does not overlap with the first starting point, and welding is repeated to ensure welding quality.

[0082] The welding parameters for the second welding can be set according to actual conditions, and can be the same as or different from the welding parameters for the first welding, and are not limited here.

[0083] S50, grinding car first pipe transition piece.

[0084] Specifically, in the present embodiment, a grinding tool is used to grind the front tube transition piece to ensure that the exterior of the front tube 1 is smooth and free of burrs and poor welding, etc., so as to ensure the aesthetics of the front tube 1 .

[0085] S60, machining the two ends of the vehicle head pipe transition piece to obtain the vehicle head pipe 1.

[0086] Specifically, in this embodiment, both ends of the vehicle front pipe transition piece are machined to remove excess material, thereby forming a first mounting portion 30 and a second mounting portion 40 that meet the requirements, thereby obtaining the vehicle front pipe 1.

[0087] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The head tube is characterized by: A first mounting portion (30) is provided at one end of the front tube, and a second mounting portion (40) is provided at the other end of the front tube. The front tube has a cavity (50). The first mounting portion (30) and the second mounting portion (40) are respectively connected to two ends of the cavity (50). An avoidance structure is also provided on the front tube. The vehicle head pipe comprises a first head pipe structure (10) and a second head pipe structure (20) which are symmetrically arranged, and the first head pipe structure (10) and the second head pipe structure (20) are fixedly connected.

2. The vehicle head tube according to claim 1, characterized in that: The front tube of the vehicle is in a spindle-shaped structure.

3. The vehicle head pipe according to claim 2, characterized in that: The first head pipe structure (10) comprises a first upper end portion (11), a first lower end portion (12) and a first middle section (13), wherein the first upper end portion (11) and the first lower end portion (12) are respectively connected to two ends of the first middle section (13); the second head pipe structure (20) comprises a second upper end portion (21), a second lower end portion (22) and a second middle section (23), wherein the second upper end portion (21) and the second lower end portion (22) are respectively connected to two ends of the second middle section (23), the first upper end portion (11) and the second upper end portion (21) are symmetrically arranged to form the first mounting portion (30), the first lower end portion (12) and the second lower end portion (22) are symmetrically arranged to form the second mounting portion (40), the first middle section (13) and the second middle section (23) are symmetrically arranged, and the wall thickness of the first middle section (13) and the wall thickness of the second middle section (23) are uniform and equal.

4. The vehicle head pipe according to claim 3, characterized in that: The first middle section (13) is provided with a first recess (131), and the second middle section (23) is provided with a second recess (231), and the first recess (131) and the second recess (231) are smoothly connected to form the avoidance structure.

5. The vehicle head pipe according to claim 3, characterized in that: The first upper end portion (11) is provided with a first limiting protrusion and a first arcuate surface, the first limiting protrusion is provided at an end of the first arcuate surface away from the outer end surface of the first upper end portion (11), the second upper end portion (21) is provided with a second limiting protrusion and a second arcuate surface, the second limiting protrusion is provided at an end of the second arcuate surface away from the outer end surface of the second upper end portion (21), the first limiting protrusion, the second limiting protrusion, the first arcuate surface and the second arcuate surface form the first mounting portion (30); And / or, the first lower end portion (12) is provided with a third limiting protrusion and a third curved surface, the third limiting protrusion is arranged at an end of the third curved surface away from the outer end surface of the first lower end portion (12), the second lower end portion (22) is provided with a fourth limiting protrusion and a fourth curved surface, the fourth limiting protrusion is arranged at an end of the fourth curved surface away from the outer end surface of the second lower end portion (22), and the third limiting protrusion, the fourth limiting protrusion, the third curved surface and the fourth curved surface form the second mounting portion (40).

6. The vehicle head pipe according to any one of claims 1 to 5, characterized in that: The first header pipe structure (10) and the second header pipe structure (20) are connected by welding.

7. A processing method, the processing method is used to process the vehicle head tube according to any one of claims 1 to 6, characterized in that: The processing method comprises the following steps: S10, forging to obtain a first matrix and a second matrix; S20, performing groove processing on the first substrate and the second substrate to form a first first pipe transition piece (10a) and a second first pipe transition piece (20a); S30, spot welding the first first pipe transition piece (10a) and the second first pipe transition piece (20a); S40, welding the first first pipe transition piece (10a) and the second first pipe transition piece (20a) to form a vehicle first pipe transition piece; S50, grinding the vehicle head pipe transition piece; S60, machining both ends of the vehicle head pipe transition piece to obtain the vehicle head pipe.

8. The processing method according to claim 7, characterized in that: Before the S20, the method further includes: S19, machining the first substrate and the second substrate to ensure that the wall thickness of the middle section of the first substrate and the wall thickness of the middle section of the second substrate are within a preset range.

9. The processing method according to claim 7, characterized in that: The S30 specifically includes: The first first pipe transition piece (10a) and the second first pipe transition piece (20a) are buckled together to form a first butt joint and a second butt joint, and a welding gun is used to spot weld the first butt joint and the second butt joint from both ends to the middle in sequence, and the spot welding of the first butt joint and the second butt joint is performed alternately.

10. The processing method according to claim 9, characterized in that: The S40 specifically includes: S41, selecting a first starting point at the first butt joint or the second butt joint to start welding, and welding one circle in any direction to form a first weld, and grinding the first weld; S42, selecting a second starting point at the first butt joint or the second butt joint to start welding, welding one circle in any direction to form a second weld, and grinding the second weld.

11. A vehicle, comprising a front fork structure (2), wherein the front fork structure (2) comprises a front fork body (201) and a cross fork (202), wherein the front fork body (201) and the cross fork (202) are arranged at an angle, characterized in that: The vehicle further comprises a front tube as claimed in any one of claims 1 to 6, wherein the front tube is fixedly connected to both the front fork body (201) and the cross fork (202).

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