CN219077384U - Motorcycle frame - Google Patents

Abstract

The purpose of the utility model is realized in the following way: a motorcycle frame comprises a frame left assembly, a frame right assembly, a middle connecting piece, a fixing bolt set and a positioning pin. The left assembly of the frame is attached to the right assembly of the frame left and right, the middle connecting piece is clamped between the left assembly of the frame and the right assembly of the frame, and the left assembly of the frame, the right assembly of the frame and the middle connecting piece are fixed through the fixing bolt set. The frame left part assembly comprises a frame left part, an engine left front supporting point bushing, an engine left rear supporting point bushing, a rear bottom fork left through hole bushing, an engine left hanging piece and an engine left hanging piece bolt. The frame right assembly comprises a frame right part, an engine right hanging piece and an engine right hanging piece bolt.

Description

Motorcycle frame

Technical Field

The utility model relates to a vehicle body frame, in particular to a vehicle frame suitable for a motorcycle.

Background

In the design of motorcycles, the motorcycle frame is often manufactured using a form of steel pipe welding. The motorcycle frame has the advantages of large weight, complex welding process and high production cost. The aluminum alloy is an emerging material and has the characteristics of high strength, light weight and the like. The aluminum alloy die casting is used as the material of the frame, so that the weight of the frame can be reduced while the strength is ensured, the number of parts required to be assembled can be reduced, and a large amount of time for assembling and manufacturing the frame is saved. The purposes of reducing the cost and improving the production efficiency can be realized.

Disclosure of Invention

In order to overcome the technical defects of the traditional steel tube type frame, the motorcycle frame formed by die casting of aluminum alloy is provided, and the frame has the characteristics of high strength, light weight, high production efficiency and the like.

Technical proposal

A motorcycle frame comprises a frame left assembly, a frame right assembly, a middle connecting piece, a fixing bolt set and a positioning pin. The left assembly of the frame is attached to the right assembly of the frame left and right, the middle connecting piece is clamped between the left assembly of the frame and the right assembly of the frame, and the left assembly of the frame, the right assembly of the frame and the middle connecting piece are fixed through the fixing bolt set.

The frame left part assembly comprises a frame left part, an engine left front supporting point bushing, an engine left rear supporting point bushing, a rear bottom fork left through hole bushing, an engine left hanging piece and an engine left hanging piece bolt. The frame right assembly comprises a frame right part, an engine right hanging piece and an engine right hanging piece bolt.

The overall structure of the left and right portions of the frame is described below.

The left part of the frame is a metal component with a trunk extending from the head pipe position to the rear and provided with a branch. The left side fixing device comprises a first frame left part fixing part, a second frame left part fixing part, a frame left part wire passing hole, a first radiator left part fixing point, a second radiator left part fixing point, an engine left front supporting point, a left hanging piece first fixing point, a left hanging piece second fixing point, a positioning pin left pin hole, a frame left part third fixing hole, a subframe left part first fixing point, a subframe left part second fixing point, a rear shock absorption left upper fixing point, an engine left rear supporting point, a left pedal bracket first fixing point, a left pedal bracket second fixing point, a rear bottom fork left through hole, an engine left lower supporting point, a middle connecting piece left limiting column and a middle connecting piece left bolt passing hole.

The right part of the frame is a metal component with a trunk extending from the head pipe position to the rear and provided with a branch. The right side fixing device comprises a first frame right part fixing part, a second frame right part fixing part, a right side through line hole of a frame, a first radiator right part fixing point, a second radiator right part fixing point, an engine right front supporting point, a first right hanging piece fixing point, a second right hanging piece fixing point, a positioning pin right pin hole, a third frame right part fixing hole, a first auxiliary frame right part fixing point, a second auxiliary frame right part fixing point, a rear shock absorption right upper fixing point, an engine right rear supporting point, a first right pedal bracket fixing point, a second right pedal bracket fixing point, a rear bottom fork right through hole, an engine right lower supporting point, a right middle connecting piece limiting column and a middle connecting piece right bolt through hole.

For convenience of description, the first fixing part of the left and right parts of the frame, the second fixing part of the left and right parts of the frame, the wire passing holes of the left and right parts of the frame, the first fixing point of the left and right parts of the radiator, the second fixing point of the left and right parts of the radiator and the front supporting point of the left and right parts of the engine are called as front parts; the left and right hanging piece first fixing point, the left and right hanging piece second fixing point, the left and right pin hole of the locating pin, the left and right third fixing hole of the frame, the left and right first fixing point of the auxiliary frame, the left and right second fixing point of the auxiliary frame and the left and right upper fixing point of the rear shock absorber are called rear parts, and the rest parts are called lower parts.

The front structure of the left and right frame parts will be described below.

The first fixing part of the left part of the frame is positioned in front of the left part of the frame and is provided with a through hole and a matching part, wherein the through hole is vertical along the direction of the head pipe, the matching part corresponds to the shape of the head pipe, the first fixing part of the right part of the frame comprises the head pipe and a through threaded hole vertical along the direction of the head pipe, and after the matching part of the left part of the frame is matched with the head pipe of the right part of the frame, the through hole of the first fixing part of the left part of the frame is coaxial with the through threaded hole of the first fixing part of the right part of the frame. The fixing bolt is inserted from a light hole penetrating through the first fixing part at the left part of the frame and screwed into the through threaded hole to realize fastening. The second fixing part at the left part of the frame is positioned at the rear of the head pipe and is a through hole with an upper section and a lower section which are coaxial, wherein the upper section is a unthreaded hole, the lower end is a threaded hole, a section of groove is arranged between the upper section and the lower section of hole, and the opening of the groove is consistent with the upper and lower heights of the second fixing part at the right part of the frame. The second fixing part at the right part of the frame is positioned at the rear of the head pipe position and is a single-section through hole, and the upper and lower ends of the through hole are consistent with the upper and lower heights of the second fixing part at the left part of the frame. The fixing bolt is inserted from the upper section hole and passes through the through hole of the second fixing part at the right part of the frame and then is screwed into the threaded hole at the lower section so as to achieve the purpose of fastening. The sizes of the wire passing holes at the left part of the frame and the wire passing holes at the right part of the frame can accommodate mechanical and electric cables of external components such as handles, lamps, meters and the like to penetrate into the frame.

The left front supporting point of the engine is positioned on the first branch of the left part of the frame and is a cylindrical protrusion with an internal threaded hole, a through hole with smaller diameter is arranged at the bottom of the internal threaded hole, the through hole is coaxial with the threaded hole, and a bolt can pass through the diameter of the through hole. The bushing of the left front supporting point of the engine is provided with a coaxial external thread surface and a flange surface, the external thread is matched with an internal thread hole of the left front supporting point of the engine, and after the bushing is screwed into the internal thread, the flange surface can be tightly attached to the end surface of the upper fixed thread hole of the engine by adjusting the number of turns of screwing. A circular bolt through hole is formed in the center of a flange of the bushing of the left front supporting point of the engine, the circular bolt through hole is matched with the through hole of the left front supporting point of the engine, and after the bushing is screwed into the internal threaded hole, a bolt can penetrate through the two holes simultaneously to be connected with a fixed threaded hole on the engine. The first fixing point at the left part of the radiator and the second fixing point at the left part of the radiator are positioned on the first branch at the left part of the frame, and the radiator is used for fixing the radiator between the wire passing hole at the left part of the frame and the left front supporting point of the engine.

The engine right front supporting point is positioned on a branch of the right part of the frame and is a cylindrical boss with a bolt hole through hole, the end face of the engine right front supporting point is tightly attached to the end face of the upper fixing threaded hole of the engine, and a bolt can pass through the bolt hole through hole to be connected with the fixing threaded hole of the engine. The first fixing point at the right part of the radiator and the second fixing point at the right part of the radiator are positioned on the branch at the right part of the frame, and are used for fixing the radiator between the wire passing hole at the right part of the frame and the supporting point at the right front of the engine.

The rear structure of the left and right frame portions will be described below.

The first fixing point and the second fixing point of the left hanging piece are positioned behind the wire passing hole at the left part of the frame and are respectively connected with the first fixing point and the second fixing point of the left hanging piece. The engine fixing point of the left hanging piece is connected with a threaded hole at a corresponding position on the engine; the first fixing point and the second fixing point of the right hanging piece are positioned behind the wire passing hole at the right part of the frame and are respectively connected with the first fixing point and the second fixing point of the right hanging piece. The engine fixing point of the right hanging piece is connected with a threaded hole at a corresponding position on the engine. With such a connection method, vibrations transmitted from the engine to the frame can be reduced.

The left frame third fixing part and the left pin hole are arranged at the rear part of the left part of the frame, the right frame third fixing part and the right pin hole are arranged right behind the right part of the frame, the left frame third fixing part is provided with a bolt through hole, and the right frame third fixing part is provided with a threaded through hole. The left pin hole and the right pin hole are positioned through positioning pins, and the fixing bolts penetrate from the third fixing parts of the left frame and the right frame at the rear parts of the left frame, are screwed into the third fixing parts of the right frame and are fixed.

The first fixing point at the left part of the auxiliary frame, the second fixing point at the left part of the frame, the first fixing point at the right part of the auxiliary frame and the second fixing point at the right part of the auxiliary frame are positioned at the rearmost parts of the left part of the frame and the right part of the frame and are fixedly connected with the auxiliary frame through bolts. The left upper fixing point of the rear shock absorber and the right upper fixing point of the rear shock absorber are provided with coaxial left bolt through holes of the rear shock absorber and right bolt through holes of the rear shock absorber, the end faces are matched with the left and right positioning end faces of the mounting holes of the upper portion of the rear shock absorber, and the fixing bolts penetrate through the left and right positioning end faces to be fastened.

The following describes the lower structure of the left and right portions of the frame.

The left rear supporting point bushing of the engine is a threaded through hole bushing with external threads. The left back supporting point of the engine is provided with a bolt through hole, a threaded hole which is coaxial and has different diameters is internally measured, the threaded hole is matched with the external threads of the left back supporting point bushing of the engine, after the left back supporting point bushing of the engine is screwed in, an inner hole of the bushing is coaxial with the bolt through hole of the left back supporting point of the engine, the end face is parallel to the end face of a corresponding mounting point of the engine, and the left back supporting point bushing of the engine is attached to the end face of the mounting point of the engine through rotating the left back supporting point bushing of the engine, so that the effect of adjusting a gap is realized. The right back supporting point of the engine is provided with a bolt through hole, and the end face is attached to the end face of the corresponding mounting point on the right side of the engine during mounting. The first fixing point of the left pedal support, the second fixing point of the left pedal support, the first fixing point of the right pedal support and the second fixing point of the right pedal support are provided with threaded holes. The first fixed point and the second fixed point of the left pedal bracket are connected with the first fixed point and the second fixed point on the left pedal bracket through bolts; the first fixed point of the right pedal bracket and the second fixed point of the right pedal bracket are connected with the first fixed point and the second fixed point on the corresponding right pedal bracket through bolts.

The left through hole of the rear bottom fork is provided with a threaded hole, the threaded hole is provided with a left through hole bushing of the rear bottom fork, the outer circle of the bushing is provided with external threads, the external threads can be screwed into the threads of the left through hole of the rear bottom fork, the end face of the left through hole bushing of the rear bottom fork is parallel to the end face of the rear bottom fork, and the installation gap of the rear bottom fork can be adjusted by adjusting the screwing length of the left through hole bushing of the rear bottom fork. The right through hole of the rear bottom fork is a through hole. The rear bottom fork shaft penetrates from the rear bottom fork left through hole, passes through the rear bottom fork shaft hole after passing through the rear bottom fork left through hole bushing, extends out from the rear bottom fork right through hole, and is fixed by the nut and then is installed.

The middle connecting piece comprises a left limiting hole, a right limiting hole, a bolt through hole, a rear shock absorption lower supporting point, an engine left lower bolt through hole and an engine right lower bolt through hole. During installation, the middle connecting piece is clamped between the left part of the frame and the right part of the frame, the left limit post of the middle connecting piece at the left part of the frame is matched with the left limit hole of the middle connecting piece, the right limit post of the middle connecting piece at the right part of the frame is matched with the right limit hole of the middle connecting piece, the lower fixing bolt penetrates into the bolt through hole of the middle connecting piece from the right bolt through hole of the middle connecting piece, then penetrates out from the left bolt through hole of the middle connecting piece, and the lower fixing nut is tightened to fasten the lower part of the frame. The engine fixing bolt penetrates into the right lower bolt through hole of the engine from the right lower supporting point of the engine, penetrates out from the left lower supporting point of the engine through the right lower bolt through hole of the engine, and is fixed through the fixing nut.

Drawings

Fig. 1 is an overall schematic view of the structure of a motorcycle frame.

Fig. 2-3 are schematic structural views of the left portion of a motorcycle frame.

Fig. 4-5 are schematic structural views of the right portion of a motorcycle frame.

Fig. 6 is a schematic structural view of the left front support point bushing.

FIG. 7 is a schematic structural view of a rear left support point bushing of the engine.

Fig. 8 is a schematic structural view of a left via bushing of the rear fork.

Fig. 9 is a schematic view of the structure of the engine left hanger plate.

Fig. 10 is a schematic view of the structure of the engine right hanger plate.

Fig. 11-12 are schematic structural views of a frame intermediate connector.

Fig. 13 is a schematic structural view of a frame connection.

Fig. 14 is a schematic view of the connection of the frame to the water tank.

Fig. 15 to 18 are schematic views of the connection of the frame to the engine.

Fig. 19-20 are schematic views of the connection of the frame to the subframe.

Fig. 21 is a schematic view of the connection of the frame to the left foot support.

FIG. 22 is a schematic illustration of the connection of the frame to the right foot support.

FIG. 23 is a schematic view of the connection of the frame to the rear bottom fork

The specific embodiment is as follows:

the specific structure of the embodiment of the present utility model is further described below with reference to the accompanying drawings.

Referring to fig. 1-6, a motorcycle frame comprises a frame left assembly 1, a frame right assembly 2, a middle connecting piece 3, a fixing bolt and nut set 4 and a positioning pin 5. The left frame assembly 1 is attached to the right frame assembly left and right, the middle connecting piece 3 is clamped between the left frame assembly and the right frame assembly, and the left frame assembly 1, the right frame assembly 2 and the middle connecting piece 3 are fixed through a fixing bolt set.

The frame left part assembly 1 comprises a frame left part 11, an engine left front supporting point bushing 12, an engine left rear supporting point bushing 13, a rear bottom fork left through hole bushing 14, an engine left hanging piece 15 and an engine left hanging piece bolt 16. The frame right assembly 2 comprises a frame right part 21, an engine right hanging piece 22 and an engine right hanging piece bolt 23.

The overall structure of the frame left portion 11, the frame right portion 21 is described below.

The frame left portion 11 is a metal member having a stem extending rearward from the head tube position and having a branch. The left side bracket comprises a first frame left side fixing part 1101, a second frame left side fixing part 1102, a frame left side wire passing hole 1103, a first radiator left side fixing point 1104, a second radiator left side fixing point 1105, an engine left front supporting point 1106, a first left hanging piece fixing point 1107, a second left hanging piece fixing point 1108, a left positioning pin hole 1109, a third frame left side fixing hole 1110, a first subframe left side fixing point 1111, a second subframe left side fixing point 1112, a left upper rear shock absorbing fixing point 1113, an engine left rear supporting point 1114, a first left pedal bracket fixing point 1115, a second left pedal bracket fixing point 1116, a left rear fork left through hole 1117, a left engine lower supporting point 1118, a left middle connecting piece limiting post 1119 and a left middle connecting piece bolt passing hole 1120.

The right frame portion 21 is a metal member having a branch and a trunk extending rearward from the head pipe position. The device comprises a head pipe 2101, a frame right first fixing part 2102, a frame right second fixing part 2103, a frame right wire passing hole 2104, a radiator right first fixing point 2105, a radiator right second fixing point 2106, an engine right front supporting point 2107, a right hanging piece first fixing point 2108, a right hanging piece second fixing point 2109, a positioning pin right pin hole 2110, a frame right third fixing hole 2111, a subframe right first fixing point 2112, a subframe right second fixing point 2113, a rear shock absorption right upper fixing point 2114, an engine right rear supporting point 2115, a right pedal bracket first fixing point 2116, a right pedal bracket second fixing point 2117, a rear bottom fork right through hole 2118, an engine right lower supporting point 2119, an intermediate connecting piece right limiting post 2120 and an intermediate connecting piece right bolt passing hole 2121.

For convenience of description, the first fixing portions 1101 and 2102 on the left and right sides of the frame, the second fixing portions 1102 and 2103 on the left and right sides of the frame, the wire passing holes 1103 and 2104 on the left and right sides of the frame, the first fixing points 1104 and 2105 on the left and right sides of the radiator, the second fixing points 1105 and 2106 on the left and right sides of the radiator, and the front supporting points 1106 and 2107 on the left and right sides of the engine are called front parts; the left and right hanger first fixing points 1107, 2108, the left and right hanger second fixing points 1108, 2109, the left and right pin holes 1109, 2110, the left and right frame third fixing holes 1110, 2111, the left and right subframe first fixing points 1111, 2112, the left and right subframe second fixing points 1112, 2113, the rear shock absorbing left and right upper fixing points 1113, 2114 are referred to as the rear, and the rest is referred to as the lower.

The front structure of the left and right frame parts will be described below.

The first fixing portion 1101 on the left part of the frame is located in front of the left part of the frame, and is provided with a through hole 11011 and a matching portion 11012 corresponding to the shape of the head pipe, the first fixing portion 2102 on the right part of the frame is located in front of the right part of the frame, and comprises a head pipe 2101 and a through threaded hole 21021, the matching portion 11012 on the left part of the frame is matched with the head pipe 2101 on the right part of the frame, and after the matching portion 11011 on the first fixing portion 1101 on the left part of the frame is matched with the through threaded hole 21021 on the first fixing portion 2102 on the right part of the frame, the through hole 11011 on the first fixing portion on the left part of the frame is coaxial with the through threaded hole 21021 on the first fixing portion 2102 on the right part of the frame. The fixing bolt 401 is inserted from the through hole 11011 passing through the first frame left fixing portion 1101 and screwed into the through screw hole 21021 to be fastened. The second fixing part 1102 at the left part of the frame is positioned at the rear of the head pipe and is a through hole with an upper section and a lower section which are coaxial, wherein the upper section 11021 is a unthreaded hole, the lower end 11022 is a threaded hole, a section of groove 11023 is arranged between the upper section hole and the lower section hole, and the opening of the groove is consistent with the upper and lower heights of the second fixing part 2103 at the right part of the frame. The second fixing part 2103 at the right part of the frame is positioned at the rear of the head pipe position and is a single-section through hole, and the height of the upper end surface and the lower end surface is consistent with the upper and lower height of the second fixing part at the left part of the frame. The fixing bolt 402 is inserted from the hole of the upper section 11021, passes through the through hole of the second fixing part 2103 of the right part of the frame and is screwed into the threaded hole of the lower section 11022 so as to achieve the purpose of fastening. The left and right frame wire holes 1103, 2104 are sized to accommodate mechanical and electrical cables from external components such as handles, lights, meters, etc. passing through the frame.

The front left supporting point 1106 of the engine is located on the first branch of the left part of the frame and is a cylindrical protrusion with an internal threaded hole 11061, the bottom of the internal threaded hole is provided with a through hole 11062 with smaller diameter, the through hole is coaxial with the threaded hole, and a bolt can pass through the through hole. The bushing 12 of the front left supporting point of the engine is provided with a coaxial external thread surface 121 and a flange surface 122, the external thread 121 is matched with an internal thread hole 11061 of the front left supporting point of the engine, and after the bushing 12 is screwed into the internal thread, the flange surface 122 can be tightly attached to the end surface 124 of the fixed thread hole on the engine by adjusting the number of screwing turns. The center of the flange of the front left supporting point bushing 12 of the engine is provided with a circular bolt through hole 123 which is matched with the through hole 11062 of the front left supporting point of the engine, and after the bushing is screwed into the internal threaded hole, the bolt 403 can pass through the two holes simultaneously to be connected with the fixed threaded hole on the engine. The radiator left first fixing point 1104 and the radiator left second fixing point 1105 are located on the first branch of the left part of the frame, and are used for fixing the radiator 11041 between the frame left wire passing hole 1103 and the engine left front supporting point 1106.

The right front supporting point 2107 of the engine is positioned on a branch of the right part of the frame and is a cylindrical boss with a bolt hole through hole 21071, the end face 21072 is tightly attached to the end face 21073 of the upper fixing threaded hole of the engine, and the bolt 404 can pass through the bolt hole and be connected 21074 with the fixing threaded hole of the engine. The radiator right first fixing point 2105 and the radiator right second fixing point 2106 are positioned on a branch of the right part of the frame, and are used for fixing the radiator 11041 between the frame right wire passing hole 2104 and the engine right front supporting point 2107.

The rear structure of the left and right frame portions will be described below.

The first fixing point 1107 and the second fixing point 1108 of the left hanging piece are located behind the wire passing hole 1103 at the left part of the frame, and are respectively connected with the first fixing point 221 and the second fixing point 222 of the left hanging piece 22 through the fixing bolt 405. The engine fixing point 223 of the left hanging piece is connected with the threaded hole 154 at the corresponding position on the engine through the fixing bolt 405; the first fixing point 151 and the second fixing point 152 of the right hanging piece 15 are positioned behind the wire passing hole 2104 at the right part of the frame, and are respectively connected with the first fixing point 2108 and the second fixing point 2109 of the frame through fixing bolts 406. The engine fixing point 153 of the right hanger plate is connected with the threaded hole 226 at a corresponding position on the engine through the fixing bolt 406. With such a connection method, vibrations transmitted from the engine to the frame can be reduced.

The left frame third fixing portion 1110 and the left pin hole 1109 are arranged at the rear part of the left part of the frame, the right frame third fixing portion 2111 and the right pin hole 2110 are arranged right behind the right part of the frame, the left frame third fixing portion 1110 is provided with a bolt through hole 11101, and the right frame third fixing portion is provided with a threaded through hole 21101. The left and right pin holes 1109 and 2110 are positioned by the positioning pins 5, and the fixing bolts 407 are inserted from the left and right frame rear left frame third fixing portions 1110, screwed into the right frame third fixing portions 2111, and fixed.

The first fixing point 1111 on the left side of the subframe, the second fixing point 1112 on the left side of the subframe, the first fixing point 2112 on the right side of the subframe, and the second fixing point 2113 on the right side of the subframe are located at the rearmost of the left side of the subframe and the right side of the subframe, and are connected and fixed with the subframe 11111 through bolts 11112, 11113, 11114 and 11115. The rear shock-absorbing left fixing point 1113 and the rear shock-absorbing right fixing point 2114 are provided with a coaxial rear shock-absorbing left bolt through hole 11131 and a rear shock-absorbing right bolt through hole 21141, the end surfaces are matched with the left positioning end surface 11132 and the right positioning end surface 21142 of the rear shock-absorbing upper mounting hole, and the fixing bolts 408 penetrate the three and are fastened by screwing nuts 409.

The following describes the lower structure of the left and right portions of the frame.

The left rear supporting point bushing 13 of the engine is a threaded through hole bushing with external threads. The left rear supporting point 1114 of the engine is provided with a bolt through hole 11141, the inner side of the left rear supporting point is provided with a threaded hole 11142 which is coaxial and has different diameters, the threaded hole 11142 is matched with the external thread 131 of the left rear supporting point bushing of the engine, after the left rear supporting point bushing 13 of the engine is screwed in, the inner hole 132 of the bushing is coaxial with the bolt through hole 11141 of the left rear supporting point of the engine, the end face 133 is parallel to the end face 134 of the corresponding mounting point of the engine, and the left rear supporting point bushing 13 of the engine can be attached to the end face 134 of the mounting point of the engine by rotating the left rear supporting point bushing of the engine, so that the effect of adjusting the gap is realized. The right engine rear support point 2115 is provided with a bolt through hole 21151, and when the engine rear support point is installed, the end face 21152 of the right engine rear mounting point is attached to the end face 21153 of the right engine corresponding mounting point. The fixing bolt 410 is inserted from the bolt through hole 21151 of the right rear supporting point of the engine, passes through the through hole 135 of the rear part of the engine and the inner hole 132 of the bushing, then is inserted from the bolt through hole 11141 of the left rear supporting point, is fastened by the nut 411, and is provided with threaded holes from the first fixing point 1115 of the left pedal bracket, the second fixing point 1116 of the left pedal bracket, the first fixing point 2116 of the right pedal bracket and the second fixing point 2117 of the right pedal bracket. The first fixing point 1115 and the second fixing point 1116 of the left pedal bracket are connected with the first fixing point 11151 and the second fixing point 11161 on the left pedal bracket through bolts 412; the right foot support first fixation point 2116, the right foot support second fixation point 2117, and the corresponding right foot support first fixation point 21161, second fixation point are connected 21171 by bolts 412.

The left via hole 1117 of the rear bottom fork is provided with a threaded hole 11171, the threaded hole is provided with a left via hole bushing 14 of the rear bottom fork, the outer circle of the bushing is provided with an external thread 141, the external thread can be screwed into the thread of the left via hole 1117 of the rear bottom fork, the end face 142 of the left via hole bushing of the rear bottom fork is parallel to the end face 143 of the rear bottom fork, and the installation gap of the rear bottom fork can be adjusted by adjusting the screwing length of the left via hole bushing 14 of the rear bottom fork. The rear bottom fork right via 2118 is a through hole. The rear fork shaft 413 penetrates from the rear fork left via hole, passes through the rear fork shaft hole after passing through the middle hole 143 of the rear fork left via hole bushing 14, then extends out from the rear fork right via hole 2118, and is fixed by the nut 414 to be mounted.

The middle connecting piece 3 comprises a left limiting hole 31, a right limiting hole 32, a bolt through hole 33, a rear shock absorption lower supporting point 34, an engine left lower bolt through hole 35 and an engine right lower bolt through hole 36. During installation, the middle connecting piece is clamped between the left frame part 11 and the right frame part 21, the left limit post 1119 of the middle connecting piece of the left frame part 11 is matched with the left limit hole 31 of the middle connecting piece, the right limit post 2120 of the middle connecting piece of the right frame part is matched with the right limit hole 32 of the middle connecting piece, the lower fixing bolt 415 penetrates the bolt through hole 33 of the middle connecting piece from the right bolt through hole 2121 of the middle connecting piece, penetrates out of the left bolt through hole 1120 of the middle connecting piece, and is tightened by the lower fixing nut 416, so that the lower part of the frame is fastened. The engine fixing bolt 417 penetrates the engine right lower bolt hole 36 from the engine right lower support point 2119, passes through the engine lower bolt hole 37, penetrates the engine left lower support point 1118, and is fixed by the fixing nut 418.

The above description is only of the preferred embodiment of the present utility model, and is not intended to limit the structure of the present utility model in any way. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims (11)

1. A motorcycle frame, characterized in that: comprises a frame left part assembly, a frame right part assembly, a middle connecting piece, a fixed bolt group and a positioning pin; the left assembly of the frame is attached to the right assembly of the frame left and right, the middle connecting piece is clamped between the left assembly of the frame and the right assembly of the frame, and the left assembly of the frame, the right assembly of the frame and the middle connecting piece are fixed through the fixing bolt set.

2. A motorcycle frame as claimed in claim 1, wherein: the frame left part assembly comprises a frame left part, an engine left front supporting point bushing, an engine left rear supporting point bushing, a rear bottom fork left through hole bushing, an engine left hanging piece and an engine left hanging piece bolt; the frame right assembly comprises a frame right part, an engine right hanging piece and an engine right hanging piece bolt.

3. A motorcycle frame as claimed in claim 1, wherein: the left part of the frame is a metal component which extends backwards from a head pipe and is provided with a branch, and the metal component comprises a first frame left part fixing part, a second frame left part fixing part, a frame left part wire passing hole, a radiator left part first fixing point, a radiator left part second fixing point, an engine left front supporting point, a left hanging piece first fixing point, a left hanging piece second fixing point, a positioning pin left pin hole, a frame left part third fixing hole, a subframe left part first fixing point, a subframe left part second fixing point, a rear shock absorption left upper fixing point, an engine left rear supporting point, a left pedal bracket first fixing point, a left pedal bracket second fixing point, a rear fork left through hole, an engine left lower supporting point, an intermediate connecting piece left limiting column and an intermediate connecting piece left bolt passing hole.

4. A motorcycle frame as claimed in claim 1, wherein: the right part of the frame is a metal component which extends backwards from a head pipe and is provided with a branch, and the metal component comprises a first right part fixing part of the frame, a second right part fixing part of the frame, a right part wire passing hole of the frame, a first right part fixing point of the radiator, a second right part fixing point of the radiator, a right front supporting point of the engine, a first right fixing point of a right hanging piece, a second right fixing point of the right hanging piece, a right pin hole of a locating pin, a third right part fixing hole of the frame, a first right part fixing point of the auxiliary frame, a second right part fixing point of the auxiliary frame, a right upper rear shock absorption fixing point of the engine, a first right pedal bracket fixing point, a second right pedal bracket fixing point, a right rear bottom fork right through hole, a right lower engine supporting point of the engine, a right limit post of an intermediate connecting piece and a right bolt passing hole of the intermediate connecting piece.

5. A motorcycle frame as claimed in claim 1 or claim 3, wherein: the first fixing part of the left part of the frame is positioned in front of the left part of the frame, and the left part of the frame is provided with a through hole which is up and down along the direction of the head pipe and a matching part which corresponds to the shape of the head pipe; the first fixing part of the right part of the frame is positioned in front of the right part of the frame and comprises a head pipe and a through threaded hole which is up and down along the direction of the head pipe; the second fixing part at the left part of the frame is positioned at the rear of the head pipe, the second fixing part is provided with an upper section and a lower section of coaxial through holes, the upper section is a unthreaded hole, the lower end is a threaded hole, a section of groove is arranged between the upper section and the lower section of holes, and the opening of the groove is consistent with the upper and lower heights of the second fixing part at the right part of the frame; the second fixing part of the right part of the frame is positioned at the rear of the head pipe position, the second fixing part is a single-section through hole, and the upper and lower ends of the second fixing part of the right part of the frame are identical in height with the upper and lower parts of the second fixing part of the left part of the frame.

6. A motorcycle frame as claimed in claim 1, wherein: the motorcycle frame also comprises an engine left front supporting point, a radiator left first fixed point, a radiator left second fixed point, a radiator right first fixed point, a radiator right second fixed point and an engine right front supporting point; the left front supporting point of the engine is positioned on a first branch of the left part of the frame, the left front supporting point is a cylindrical protrusion provided with an internal threaded hole, a through hole is formed in the bottom of the internal threaded hole, and the through hole is coaxial with the threaded hole; the bushing of the left front supporting point of the engine is provided with an external thread surface and a flange surface which are coaxial, the external thread is matched with an internal thread hole of the left front supporting point of the engine, and the flange surface can be tightly attached to the end surface of the fixed thread hole on the engine by adjusting the number of turns of the bushing after the bushing is screwed into the internal thread; a circular bolt through hole is formed in the center of the flange of the engine left front supporting point bushing and is matched with the through hole of the engine left front supporting point; the first fixing point at the left part of the radiator and the second fixing point at the left part of the radiator are positioned on the first branch at the left part of the frame, and between the wire passing hole at the left part of the frame and the left front supporting point of the engine; the right front supporting point of the engine is positioned on a branch of the right part of the frame and is a cylindrical boss provided with a bolt hole through hole, and the end face of the cylindrical boss is tightly attached to the end face of a fixed threaded hole on the engine; the first fixing point at the right part of the radiator and the second fixing point at the right part of the radiator are positioned on the branch at the right part of the frame, and are positioned between the wire passing hole at the right part of the frame and the right front supporting point of the engine.

7. A motorcycle frame as claimed in claim 1 or 4, wherein: the first fixed point and the second fixed point of the left hanging piece of the frame are positioned behind the wire passing hole at the left part of the frame and are respectively connected with the first fixed point and the second fixed point of the left hanging piece; the first fixing point and the second fixing point of the right hanging piece of the frame are positioned behind the wire passing hole at the right part of the frame and are respectively connected with the first fixing point and the second fixing point of the right hanging piece.

8. A motorcycle frame as claimed in claim 1 or 4, wherein: the motorcycle frame also comprises a left frame third fixing part, a right frame third fixing part, an auxiliary frame, a rear shock absorption left upper fixing point and a rear shock absorption right upper fixing point; the left frame third fixing part and the left pin hole are arranged at the rear part of the left part of the frame, the right frame third fixing part and the right pin hole are arranged right behind the right part of the frame, the left frame third fixing part is provided with a bolt through hole, and the right frame third fixing part is provided with a threaded through hole; the left fixed point of the auxiliary frame, the left second fixed point of the auxiliary frame, the right first fixed point of the auxiliary frame and the right second fixed point of the auxiliary frame are positioned at the rearmost parts of the left part and the right part of the frame and are fixedly connected with the auxiliary frame through bolts; the left upper fixing point of the rear shock absorber and the right upper fixing point of the rear shock absorber are provided with coaxial left bolt through holes of the rear shock absorber and right bolt through holes of the rear shock absorber, the end faces are matched with the left and right positioning end faces of the mounting holes of the upper portion of the rear shock absorber, and the fixing bolts penetrate through the left and right positioning end faces to be fastened.

9. A motorcycle frame as claimed in claim 1 or 4, wherein: the motorcycle frame also comprises a left rear supporting point of the engine, a right rear supporting point of the engine, a first fixed point of the left pedal bracket and a second fixed point of the right pedal bracket; the left rear supporting point bushing of the engine is a threaded through hole bushing provided with external threads; the left rear supporting point of the engine is provided with a bolt through hole, the inner test is provided with coaxial threaded holes with different diameters, the coaxial threaded holes are matched with the external threads of the left rear supporting point bushing of the engine, after the left rear supporting point bushing of the engine is screwed in, the inner hole of the bushing is coaxial with the bolt through hole of the left rear supporting point of the engine, and the end face of the bushing is parallel to the end face of the corresponding mounting point of the engine; the right rear supporting point of the engine is provided with a bolt through hole; the first fixing point of the left pedal bracket, the second fixing point of the left pedal bracket, the first fixing point of the right pedal bracket and the second fixing point of the right pedal bracket are provided with threaded holes; the first fixed point and the second fixed point of the left pedal bracket are connected with the first fixed point and the second fixed point on the left pedal bracket through bolts; the first fixed point of the right pedal bracket and the second fixed point of the right pedal bracket are connected with the first fixed point and the second fixed point on the corresponding right pedal bracket through bolts.

10. A motorcycle frame as claimed in claim 1 or 4, wherein: the motorcycle frame also comprises a rear bottom fork left via hole and a rear bottom fork right via hole; the left through hole of the rear bottom fork is provided with a threaded hole, the threaded hole is provided with a left through hole bushing of the rear bottom fork, the outer circle of the bushing is provided with external threads, and the end face of the left through hole bushing of the rear bottom fork is parallel to the end face of the rear bottom fork; the right through hole of the rear bottom fork is a through hole.

11. A motorcycle frame as claimed in claim 1, wherein: the middle connecting piece comprises a left limiting hole, a right limiting hole, a bolt through hole, a rear shock absorption lower supporting point, an engine left lower bolt through hole and an engine right lower bolt through hole.

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