Method for manufacturing rear shock absorber assembly of motorcycle

Abstract

The invention provides a method for manufacturing a rear shock absorber assembly of a motorcycle in order to solve the problems that a welding line needs to bear large impact force, bending force, torsion and the like in a connecting method of a rear shock absorber of the motorcycle in the prior art. A reinforcing hoop is adopted as a main stress bearing part for welding connection of a connecting shaft sleeve of the rear shock absorber of the motorcycle and an oil cylinder or a piston end, the reinforcing hoop structurally comprises a hollow cylinder and a semi-cylindrical hoop, an opening of the semi-cylindrical hoop faces outwards, and the semi-cylindrical hoop is arranged at the end of the hollow cylinder in the radial direction; a coping clamp is adopted to weld the reinforcing hoop; the coping clamp comprises a base plate, a positioning seat, a pressing mechanism and a jacking mechanism. The manufacturing method of the rear shock absorber assembly of the motorcycle has the beneficial technical effects that all the welding lines do not directly bear impact force or bending force, and the main stress parts of the welding lines are the sheet metal stamping reinforcing hoops, so that the impact resistance and the bending resistance are effectively improved.

Description

Technical Field

[0001] The invention relates to a motorcycle rear shock absorber technology, and in particular to a method for manufacturing a motorcycle rear shock absorber assembly. Background Art

[0002] The rear shock absorber of a motorcycle is one of the most important parts of the entire motorcycle, and plays a dual role of bearing weight and shock absorption at the rear of the motorcycle. Most rear shock absorbers of motorcycles adopt a dual structure of hydraulic shock absorption and spring shock absorption, that is, a shock absorption spring is installed on the outside of the hydraulic shock absorption cylinder. The two ends of the rear shock absorber of a motorcycle are respectively connected to the front of the flat fork and the middle of the rear frame. In order to ensure reliable and stable connection, a sleeve shaft connection structure is adopted. The sleeve shaft connection structure refers to welding connecting shaft sleeves with axes perpendicular to the axis of the rear shock absorber at both ends of the rear shock absorber of the motorcycle, and setting connecting shafts at the front of the flat fork and the middle of the rear frame respectively. When installing, the connecting shaft sleeves at both ends of the rear shock absorber are respectively installed on the connecting shafts at the front of the flat fork and the middle of the rear frame. In order to increase lubrication and shock absorption, usually, oil-containing bearings and rubber shock absorbing rings and other parts are installed between the connecting shaft sleeves and the connecting shaft at both ends of the shock absorber. The two ends of the motorcycle rear shock absorber are actually the two ends of the oil cylinder and piston of the hydraulic shock absorber, and both are cylindrical, and the connecting sleeve is also a hollow cylinder. Usually, a semicircular notch with a diameter matching the connecting sleeve is set at the end of the oil cylinder or the piston, and then the middle of the outer circle of the connecting sleeve is placed in the notch; the two are connected together by welding (see attached Figure 1 In the figure, a is a hydraulic shock absorber, b is a shock absorbing spring, c is an upper connecting sleeve, d is a lower connecting sleeve, and A is a welding line). Since the welding connection between the connecting sleeve and the end of the oil cylinder or piston is actually a welding connection of two cylinders intersecting at 90 degrees, the entire welding line is the edge of the circle. The rear shock absorber of a motorcycle needs to withstand a large gravity and impact force at the same time; and since the connection between the connecting sleeve and the end of the oil cylinder or piston is a 90-degree right-angle connection, the welding line also needs to withstand a large bending force and torsion.

[0003] Obviously, the existing motorcycle rear shock absorber connection method has the problem that the welding line needs to withstand large impact force, bending force and torsion. Summary of the invention

[0004] In order to solve the problems existing in the prior art motorcycle rear shock absorber connection method, that the welding line needs to withstand large impact force, bending force and torsion, etc., the present invention proposes a motorcycle rear shock absorber assembly manufacturing method.

[0005] The manufacturing method of the motorcycle rear shock absorber assembly of the present invention adopts a reinforcing hoop as the main load-bearing member for welding the connecting sleeve and the end of the oil cylinder or piston of the motorcycle rear shock absorber, and the reinforcing hoop is stamped and formed by a metal plate and is in two pieces; the structure of the reinforcing hoop includes a hollow cylinder and a semi-cylindrical clamp, and the opening of the semi-cylindrical clamp is radially arranged outward at the end of the hollow cylinder; wherein the inner diameter of the hollow cylinder matches the outer diameter of the connecting sleeve, and the inner diameter of the semi-cylindrical clamp matches the outer diameter of the end of the oil cylinder or piston; and a semicircular notch with a radius matching the outer diameter of the connecting sleeve is arranged at the end of the oil cylinder or piston; a top pressing fixture is used to weld the reinforcing hoop; the top pressing fixture includes a base plate, a positioning seat, a clamping mechanism and The clamping mechanism is provided; the base plate is a rectangular plate; the positioning seat is a rectangular plate with a V-shaped positioning notch on the upper part, and there are two of them, which are respectively fixed at the two ends of the longitudinal middle part of the base plate; the height and fixed position of the positioning seat are based on the upper flange and lower stud of the motorcycle rear shock absorber to be welded being placed in the corresponding V-shaped notch of the positioning seat after the motorcycle rear shock absorber to be welded is placed in the corresponding V-shaped notch of the positioning seat, and the axis of the motorcycle rear shock absorber to be welded is parallel to the surface of the base plate; there are two clamping mechanisms, which are respectively fixed at the rear side of the base plate and the positions opposite to the two positioning seats; there are two clamping mechanisms, which are respectively fixed at the left and right ends of the base plate, and the axis of the push rod is coaxial with the axis of the motorcycle rear shock absorber to be welded after being placed in the V-shaped notch of the positioning seat; the following steps are included:

[0006] S1. Place the motorcycle rear shock absorber to be welded on a fixed seat, wherein the upper flange and the lower stud of the motorcycle rear shock absorber to be welded are respectively placed in the corresponding V-shaped notches of the fixed seat;

[0007] S2, respectively pull the pressure rods of the pressing mechanism so that the pressure head of the pressing mechanism respectively presses the upper flange and the lower stud of the motorcycle rear shock absorber to be welded into the V-shaped notch of the fixed seat, thereby positioning and fixing the motorcycle rear shock absorber to be welded;

[0008] S3, the openings of the two reinforcing hoops are relatively mounted on the connecting sleeve, and the axes of the two semi-cylindrical hoops are coaxial with the radius of the axial midpoint of the connecting sleeve, that is, the two semi-cylindrical hoops form a full cylinder and a set gap is left between the openings;

[0009] S4, placing the connecting sleeve with the reinforcing hoop in the semicircular chuck at the front end of the push rod of the tightening mechanism, pulling the rocker of the tightening mechanism, the push rod moves forward to sleeve the hollow cylinder composed of the two semi-cylindrical clamps on the end of the oil cylinder or piston of the rear shock absorber of the motorcycle to be welded, and make the circular notch of the end of the oil cylinder or piston closely contact with the outer circle of the connecting sleeve; because the hollow cylinder composed of the two semi-cylindrical clamps of the reinforcing hoop is sleeved on the end of the oil cylinder or piston, it is called a jacket-type reinforcing hoop;

[0010] S5. Use manual or mechanical hands to weld the ends of the two semi-cylindrical clamps to the neck of the oil cylinder or piston end, weld the sides of the openings of the two semi-cylindrical clamps to the outer circle of the oil cylinder or piston end, and weld the edge of the hollow cylinder of the reinforcing clamp to the outer circle of the connecting sleeve;

[0011] S6, loosen the clamping mechanism and the pushing mechanism, rotate the rear shock absorber of the motorcycle to be welded, and complete the welding connection of the remaining welding lines;

[0012] in:

[0013] The clamping mechanism comprises a base, an articulated seat I, a T-shaped pressure head, a pressure rod, a connecting rod I and a V-shaped pressure head; the base is a rectangular parallelepiped, the articulated seat I is fixed on the upper surface of the base, and hinge holes are provided at the front and rear ends of the articulated seat I; the bottom of the vertical side of the T-shaped pressure head is hinged to the hinge hole at the front end of the articulated seat I, the front side of the horizontal side of the T-shaped pressure head is provided with a V-shaped pressure head, and the rear side of the horizontal side of the T-shaped pressure head is provided with a hinge hole; the pressure rod is a long strip, and two hinge holes are provided at the front section of the pressure rod, the hinge hole at the end of the pressure rod is hinged to the rear side of the horizontal side of the T-shaped pressure head, and the hinge hole in the middle is hinged to one end of the connecting rod I; the other end of the connecting rod I is hinged to the rear end of the articulated seat I; the height and fixed position of the clamping mechanism shall be based on the compression of the upper flange or lower stud of the rear shock absorber of the motorcycle to be welded by the V-shaped pressure head and the V-shaped notch of the relative fixed seat when the clamping mechanism is in the clamping state;

[0014] The push mechanism includes a base, an articulated seat II, a guide seat, a push rod, a rocker, a connecting rod II and a semicircular chuck; the base is a rectangular parallelepiped, the articulated seat II is fixed to the rear side of the upper surface of the base, the guide seat is fixed to the front side of the upper surface of the base, and the push rod is slidably installed in the guide hole of the guide seat; the rocker is a bent long strip, and hinge holes are respectively provided at the end and the bend of the short folded edge, the end of which is hinged to the articulated seat II, and the bend is hinged to one end of the connecting rod II; the other end of the connecting rod II is hinged to the end of the push rod; the semicircular chuck has a radius that matches the outer diameter of the reinforcing hoop and a length that matches the length of the connecting sleeve A semicircular cylinder, a connecting column is arranged at the center of the rear side of the semicircular cylinder and is coaxially fixed to the front end of the push rod through the connecting column; the axis of the connecting column intersects vertically with the axis of the semicircular cylinder; semicircular steps with a radius matching the outer diameter of the connecting sleeve are arranged at both ends of the inner side of the semicircular chuck, and the spacing of the semicircular steps matches the total length of the two reinforcing hoops after they are mounted on the connecting sleeve according to the design requirements; the height and installation position of the tightening mechanism are based on the fact that when the tightening mechanism is in the tightening state, the notch of the cylinder or piston end is in close contact with the outer circle of the connecting sleeve and the axis of the connecting sleeve is parallel to the surface of the substrate.

[0015] Furthermore, the oil cylinder or piston end of the motorcycle rear shock absorber is provided with an axial circular blind hole, the outer diameter of the semi-cylindrical clamp of the reinforcing hoop matches the inner diameter of the blind hole of the oil cylinder or piston end; and a semi-circular notch whose radius matches the outer diameter of the hollow cylinder of the reinforcing hoop is provided at the end of the oil cylinder or piston; at the same time, the manufacturing steps are adjusted accordingly, including:

[0016] S3, the openings of the two reinforcing hoops are relatively mounted on the connecting sleeve, and the sides of the two semi-cylindrical hoops are in close contact, that is, the two semi-cylindrical hoops form a whole cylinder and there is no gap between the openings;

[0017] S4, placing the connecting sleeve with the reinforcing hoop in the semicircular chuck at the front end of the push rod of the tightening mechanism, pulling the rocker of the tightening mechanism, the push rod moves forward to insert the hollow cylinder composed of the two semi-cylindrical clamps into the blind hole of the end of the oil cylinder or piston of the rear shock absorber of the motorcycle to be welded, and making the circular part of the end of the oil cylinder or piston closely contact with the outer circle of the reinforcing hoop; because the hollow cylinder composed of the two semi-cylindrical clamps of the reinforcing hoop is inserted into the blind hole of the end of the oil cylinder or piston, it is called an internal insertion reinforcing hoop;

[0018] S5. Use manual or mechanical means to weld the sides of the openings of the two semi-cylindrical clamps together, weld the notch of the cylinder or piston end to the outer circle of the reinforcing clamp, and weld the edge of the hollow cylinder of the reinforcing clamp to the outer circle of the connecting sleeve.

[0019] Furthermore, the reinforcing hoop is formed by stamping a metal plate with a thickness of 2-5 mm.

[0020] The beneficial technical effect of the manufacturing method of the motorcycle rear shock absorber assembly of the present invention is that the welding lines do not directly bear impact force or bending force, and the main stress-bearing parts are the sheet metal stamping reinforcement hoop, which effectively improves the impact resistance and bending resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Attached Figure 1 It is a three-dimensional schematic diagram of the welding connection between the rear shock absorber sleeve and the cylinder or piston end of a motorcycle in the prior art;

[0022] Attached Figure 2 It is a three-dimensional schematic diagram of the outer sleeve type reinforcing hoop of the rear shock absorber assembly of a motorcycle according to the present invention;

[0023] Attached Figure 3 It is a three-dimensional schematic diagram of a motorcycle rear shock absorber assembly reinforcement hoop of the present invention;

[0024] Attached Figure 4 is a three-dimensional schematic diagram of the capping fixture of the present invention;

[0025] Attached Figure 5 is a three-dimensional schematic diagram of the clamping mechanism of the present invention;

[0026] Attached Figure 6 It is a three-dimensional schematic diagram of the tightening mechanism of the present invention;

[0027] Attached Figure 7 It is a three-dimensional schematic diagram of the welding state of the rear shock absorber of a motorcycle to be welded by the top pressing fixture of the present invention;

[0028] Attached Figure 8 The three-dimensional schematic diagram of the internal insertion reinforcing hoop of the rear shock absorber assembly of a motorcycle according to the present invention.

[0029] In the figure, a is a hydraulic shock absorber, b is a shock absorbing spring, c is an upper sleeve, d is a lower sleeve, A is a welding line, 1 is a peripheral reinforcement hoop, 2 is an internal reinforcement hoop, 3 is a base plate, 4 is a positioning seat, 5 is a clamping mechanism, 5-1 is a base, 5-2 is an articulated seat I, 5-3 is a T-shaped pressure head, 5-4 is a pressure rod, 5-5 is a connecting rod I, 5-6 is a V-shaped pressure head, a clamping mechanism 6, 6-1 is a base, 6-2 is an articulated seat II, 6-3 is a guide seat, 6-4 is a push rod, 6-5 is a rocker, 6-6 is a connecting rod II, and 6-7 is a semicircular chuck.

[0030] The following is a further description of the method for manufacturing the rear shock absorber assembly for motorcycle according to the present invention in conjunction with the accompanying drawings and specific embodiments. DETAILED DESCRIPTION

[0031] By the attached Figure 2 , 3, 4, 5, 6, and 7 show that the method for manufacturing a rear shock absorber assembly of a motorcycle of the present invention adopts a reinforcing hoop as the main load-bearing member for welding the connecting sleeve of the rear shock absorber of the motorcycle to the end of the oil cylinder or the piston, and the reinforcing hoop is stamped and formed by two metal sheets; the structure of the reinforcing hoop comprises a hollow cylinder and a semi-cylindrical clamp, and the opening of the semi-cylindrical clamp is radially arranged outward at the end of the hollow cylinder; wherein the inner diameter of the hollow cylinder matches the outer diameter of the connecting sleeve, and the inner diameter of the semi-cylindrical clamp matches the outer diameter of the oil cylinder or the piston end; and a semicircular notch whose radius matches the outer diameter of the connecting sleeve is arranged at the end of the oil cylinder or the piston; a top pressing fixture is used to weld the reinforcing hoop; the top pressing fixture comprises a base plate 3, a positioning seat 4, A clamping mechanism 5 and a clamping mechanism 6; the substrate is a rectangular plate; the positioning seat is a rectangular plate with a V-shaped positioning notch on the upper part, and there are two of them, which are respectively fixed at the two ends of the longitudinal middle part of the substrate; the height and fixed position of the positioning seat are based on the upper flange and lower stud of the motorcycle rear shock absorber to be welded being placed in the corresponding V-shaped notch of the positioning seat, and the axis of the motorcycle rear shock absorber to be welded is parallel to the surface of the substrate; there are two clamping mechanisms, which are respectively fixed at the rear side of the substrate opposite to the two positioning seats; there are two clamping mechanisms, which are respectively fixed at the left and right ends of the substrate, and the axis of the push rod is coaxial with the axis of the motorcycle rear shock absorber to be welded after being placed on the V-shaped notch of the positioning seat; comprising the following steps:

[0032] S1. Place the motorcycle rear shock absorber to be welded on a fixed seat, wherein the upper flange and the lower stud of the motorcycle rear shock absorber to be welded are respectively placed in the corresponding V-shaped notches of the fixed seat;

[0033] S2, respectively pull the pressure rods of the pressing mechanism so that the pressure head of the pressing mechanism respectively presses the upper flange and the lower stud of the motorcycle rear shock absorber to be welded into the V-shaped notch of the fixed seat, thereby positioning and fixing the motorcycle rear shock absorber to be welded;

[0034] S3, the openings of the two reinforcing hoops are relatively mounted on the connecting sleeve, and the axes of the two semi-cylindrical hoops are coaxial with the radius of the axial midpoint of the connecting sleeve, that is, the two semi-cylindrical hoops form a full cylinder and a set gap is left between the openings;

[0035] S4, placing the connecting sleeve with the reinforcing hoop in the semicircular chuck at the front end of the push rod of the tightening mechanism, pulling the rocker of the tightening mechanism, the push rod moves forward to sleeve the hollow cylinder composed of the two semi-cylindrical clamps on the end of the oil cylinder or piston of the rear shock absorber of the motorcycle to be welded, and make the circular notch of the end of the oil cylinder or piston closely contact with the outer circle of the connecting sleeve; because the hollow cylinder composed of the two semi-cylindrical clamps of the reinforcing hoop is sleeved on the end of the oil cylinder or piston, it is called a jacket-type reinforcing hoop;

[0036] S5. Use manual or mechanical hands to weld the ends of the two semi-cylindrical clamps to the neck of the oil cylinder or piston end, weld the sides of the openings of the two semi-cylindrical clamps to the outer circle of the oil cylinder or piston end, and weld the edge of the hollow cylinder of the reinforcing clamp to the outer circle of the connecting sleeve;

[0037] S6, loosen the clamping mechanism and the pushing mechanism, rotate the rear shock absorber of the motorcycle to be welded, and complete the welding connection of the remaining welding lines;

[0038] in:

[0039] The clamping mechanism includes a base 5-1, an articulated seat Ⅰ5-2, a T-shaped pressure head 5-3, a pressure rod 5-4, a connecting rod Ⅰ5-5 and a V-shaped pressure head 5-6; the base is a rectangular parallelepiped, the articulated seat Ⅰ is fixed on the upper surface of the base, and articulated holes are provided at the front and rear ends of the articulated seat Ⅰ; the bottom of the vertical side of the T-shaped pressure head is hinged to the articulated hole at the front end of the articulated seat Ⅰ, the front side of the horizontal side of the T-shaped pressure head is provided with a V-shaped pressure head, and the rear side of the horizontal side of the T-shaped pressure head is provided with an articulated hole; The pressure rod is in the shape of a long strip, and two hinge holes are arranged at the front section of the pressure rod, the hinge hole at the end of the pressure rod is hinged to the rear side of the horizontal side of the T-shaped pressure head, and the hinge hole in the middle is hinged to one end of the connecting rod I; the other end of the connecting rod I is hinged to the rear end of the hinge seat I; the height and fixed position of the clamping mechanism are based on the clamping of the upper flange or lower stud of the rear shock absorber of the motorcycle to be welded by the V-shaped pressure head and the V-shaped notch of the relative fixed seat when the clamping mechanism is in the clamping state;

[0040] The pushing mechanism includes a base 6-1, an articulated seat II 6-2, a guide seat 6-3, a push rod 6-4, a rocker 6-5, a connecting rod II 6-6 and a semicircular chuck 6-7; the base is a rectangular parallelepiped, the articulated seat II is fixed on the rear side of the upper surface of the base, the guide seat is fixed on the front side of the upper surface of the base, and the push rod is slidably installed in the guide hole of the guide seat; the rocker is a bent long strip, and hinge holes are respectively provided at the end and the bend of the short folded edge, the end of which is hinged to the articulated seat II, and the bend is hinged to one end of the connecting rod II; the other end of the connecting rod II is hinged to the end of the push rod; the semicircular chuck has a radius matching the outer diameter of the reinforcing hoop and a length matching the outer diameter of the reinforcing hoop. A semicircular cylinder with a length matching that of the connecting sleeve is provided at the center of the rear side of the semicircular cylinder and is coaxially fixed to the front end of the push rod through the connecting column; the axis of the connecting column intersects perpendicularly with the axis of the semicircular cylinder; semicircular steps with a radius matching the outer diameter of the connecting sleeve are provided at both ends of the inner side of the semicircular chuck, and the spacing of the semicircular steps matches the total length of the two reinforcing hoops after they are sleeved on the connecting sleeve according to the design requirements; the height and installation position of the tightening mechanism are based on the fact that when the tightening mechanism is in a tightening state, the circle of the oil cylinder or the piston end is in close contact with the outer circle of the connecting sleeve and the axis of the connecting sleeve is parallel to the surface of the substrate. The manufacturing method of the rear shock absorber assembly of the motorcycle of the present invention is provided with two reinforcing hoops consisting of semicircles on the outside of the connecting line between the connecting sleeve and the oil cylinder or the piston end, so that the impact force, bending force and torsion caused by various factors are all borne by the reinforcing hoops. Since the reinforcing hoop is a stamped sheet metal part, the connecting part where the two cylindrical shapes are connected at right angles is an integral structure, which effectively improves the impact resistance and bending resistance. In addition, the hollow cylinder of the reinforcing hoop is integrally mounted on the connecting sleeve, the semi-cylindrical hoop end and side of the reinforcing hoop are respectively welded to the end and outer circle of the oil cylinder or piston, and the edge of the hollow cylinder of the reinforcing hoop is welded to the outer circle of the connecting sleeve, which effectively ensures the support and connection function of the reinforcing hoop. The use of a pressure top fixture to weld the reinforcing hoop can not only ensure the welding effect, but also lay the foundation for realizing automatic welding.

[0041] Attached Figure 8 The present invention is a three-dimensional schematic diagram of an internal plug-in reinforcing hoop of a motorcycle rear shock absorber assembly. As can be seen from the figure, the oil cylinder or piston end of the motorcycle rear shock absorber is provided with an axial circular blind hole, and the outer diameter of the semi-cylindrical clamp of the reinforcing hoop matches the inner diameter of the blind hole of the oil cylinder or piston end; and a semi-circular notch whose radius matches the outer diameter of the hollow cylinder of the reinforcing hoop is provided at the end of the oil cylinder or piston; at the same time, the manufacturing steps are adjusted accordingly, including:

[0042] S3, the openings of the two reinforcing hoops are relatively mounted on the connecting sleeve, and the sides of the two semi-cylindrical hoops are in close contact, that is, the two semi-cylindrical hoops form a whole cylinder and there is no gap between the openings;

[0043] S4, placing the connecting sleeve with the reinforcing hoop in the semicircular chuck at the front end of the push rod of the tightening mechanism, pulling the rocker of the tightening mechanism, the push rod moves forward to insert the hollow cylinder composed of the two semi-cylindrical clamps into the blind hole of the end of the oil cylinder or piston of the rear shock absorber of the motorcycle to be welded, and making the circular part of the end of the oil cylinder or piston closely contact with the outer circle of the reinforcing hoop; because the hollow cylinder composed of the two semi-cylindrical clamps of the reinforcing hoop is inserted into the blind hole of the end of the oil cylinder or piston, it is called an internal insertion reinforcing hoop;

[0044] S5. Use manual or mechanical means to weld the sides of the openings of the two semi-cylindrical clamps together, weld the notch of the cylinder or piston end to the outer circle of the reinforcing clamp, and weld the edge of the hollow cylinder of the reinforcing clamp to the outer circle of the connecting sleeve.

[0045] Since the whole cylinder formed by the two semi-cylindrical hoops of the internal reinforcement hoop is inserted into the blind hole of the cylinder or piston end, it is equivalent to adding a rigid connection of an integral structure between the cylinder or piston end and the connecting sleeve, which greatly increases the bearing capacity of the welding line between the cylinder or piston end and the connecting sleeve, and effectively improves the impact resistance and bending resistance.

[0046] As one of the preferred technical solutions, the reinforcing hoop is formed by stamping a metal sheet with a thickness of 2-5 mm. Obviously, the reinforcing hoop must consider the connection strength and rigidity, the difficulty and processing cost of stamping, and the space capacity of the motorcycle rear shock absorber connection part; stamping a reinforcing hoop with a thickness of 2-5 mm should be a better choice.

[0047] Obviously, the beneficial technical effect of the method for manufacturing the motorcycle rear shock absorber assembly of the present invention is that the reinforcing hoop formed by sheet metal stamping becomes a bearing component for impact force, bending force and torsion force, which effectively improves the impact resistance and bending resistance.

Claims

1. A method for manufacturing a motorcycle rear shock absorber assembly, characterized in that: A reinforcing hoop is used as the main load-bearing part for welding the connecting sleeve of the motorcycle rear shock absorber to the end of the cylinder or piston. The reinforcing hoop is stamped and formed by two metal plates. The structure of the reinforcing hoop includes a hollow cylinder and a semi-cylindrical clamp. The opening of the semi-cylindrical clamp is radially arranged outward at the end of the hollow cylinder. The inner diameter of the hollow cylinder matches the outer diameter of the connecting sleeve, and the inner diameter of the semi-cylindrical clamp matches the outer diameter of the cylinder or piston end. In addition, a semicircular notch with a radius matching the outer diameter of the connecting sleeve is arranged at the end of the cylinder or piston. A top clamp is used to weld the reinforcing hoop. The top clamp includes a base plate, a positioning seat, a clamping mechanism and a clamping mechanism. The base plate The invention relates to a rectangular plate; the positioning seat is a rectangular plate with a V-shaped positioning notch on the upper part, and there are two of them, which are respectively fixed at the two ends of the longitudinal middle part of the base plate; the height and fixed position of the positioning seat are based on the upper flange and the lower stud of the motorcycle rear shock absorber to be welded being placed in the corresponding V-shaped notch of the positioning seat after the motorcycle rear shock absorber to be welded is placed in the V-shaped notch of the positioning seat, and the axis of the motorcycle rear shock absorber to be welded is parallel to the surface of the base plate; there are two clamping mechanisms, which are respectively fixed at the rear side of the base plate and the positions opposite to the two positioning seats; there are two pressing mechanisms, which are respectively fixed at the left and right ends of the base plate, and the axis of the push rod is coaxial with the axis of the motorcycle rear shock absorber to be welded after being placed in the V-shaped notch of the positioning seat; it includes the following steps: S1. Place the motorcycle rear shock absorber to be welded on a fixed seat, wherein the upper flange and the lower stud of the motorcycle rear shock absorber to be welded are respectively placed in the corresponding V-shaped notches of the fixed seat; S2, respectively pull the pressure rods of the pressing mechanism so that the pressure head of the pressing mechanism respectively presses the upper flange and the lower stud of the motorcycle rear shock absorber to be welded into the V-shaped notch of the fixed seat, thereby positioning and fixing the motorcycle rear shock absorber to be welded; S3, the openings of the two reinforcing hoops are relatively mounted on the connecting sleeve, and the axes of the two semi-cylindrical hoops are coaxial with the radius of the axial midpoint of the connecting sleeve, that is, the two semi-cylindrical hoops form a full cylinder and a set gap is left between the openings; S4, placing the connecting sleeve with the reinforcing hoop in the semicircular chuck at the front end of the push rod of the tightening mechanism, pulling the rocker of the tightening mechanism, the push rod moves forward to sleeve the hollow cylinder composed of the two semi-cylindrical clamps on the end of the oil cylinder or piston of the rear shock absorber of the motorcycle to be welded, and make the circular notch of the end of the oil cylinder or piston closely contact with the outer circle of the connecting sleeve; because the hollow cylinder composed of the two semi-cylindrical clamps of the reinforcing hoop is sleeved on the end of the oil cylinder or piston, it is called a jacket-type reinforcing hoop; S5. Use manual or mechanical hands to weld the ends of the two semi-cylindrical clamps to the neck of the oil cylinder or piston end, weld the sides of the openings of the two semi-cylindrical clamps to the outer circle of the oil cylinder or piston end, and weld the edge of the hollow cylinder of the reinforcing clamp to the outer circle of the connecting sleeve; S6, loosen the clamping mechanism and the pushing mechanism, rotate the rear shock absorber of the motorcycle to be welded, and complete the welding connection of the remaining welding lines; in: The clamping mechanism comprises a base, an articulated seat I, a T-shaped pressure head, a pressure rod, a connecting rod I and a V-shaped pressure head; the base is a rectangular parallelepiped, the articulated seat I is fixed on the upper surface of the base, and hinge holes are provided at the front and rear ends of the articulated seat I; the bottom of the vertical side of the T-shaped pressure head is hinged to the hinge hole at the front end of the articulated seat I, the front side of the horizontal side of the T-shaped pressure head is provided with a V-shaped pressure head, and the rear side of the horizontal side of the T-shaped pressure head is provided with a hinge hole; the pressure rod is a long strip, and two hinge holes are provided at the front section of the pressure rod, the hinge hole at the end of the pressure rod is hinged to the rear side of the horizontal side of the T-shaped pressure head, and the hinge hole in the middle is hinged to one end of the connecting rod I; the other end of the connecting rod I is hinged to the rear end of the articulated seat I; the height and fixed position of the clamping mechanism shall be based on the compression of the upper flange or lower stud of the rear shock absorber of the motorcycle to be welded by the V-shaped pressure head and the V-shaped notch of the relative fixed seat when the clamping mechanism is in the clamping state; The push mechanism includes a base, an articulated seat II, a guide seat, a push rod, a rocker, a connecting rod II and a semicircular chuck; the base is a rectangular parallelepiped, the articulated seat II is fixed to the rear side of the upper surface of the base, the guide seat is fixed to the front side of the upper surface of the base, and the push rod is slidably installed in the guide hole of the guide seat; the rocker is a bent long strip, and hinge holes are respectively provided at the end and the bend of the short folded edge, the end of which is hinged to the articulated seat II, and the bend is hinged to one end of the connecting rod II; the other end of the connecting rod II is hinged to the end of the push rod; the semicircular chuck has a radius that matches the outer diameter of the reinforcing hoop and a length that matches the length of the connecting sleeve A semicircular cylinder, a connecting column is arranged at the center of the rear side of the semicircular cylinder and is coaxially fixed to the front end of the push rod through the connecting column; the axis of the connecting column intersects vertically with the axis of the semicircular cylinder; semicircular steps with a radius matching the outer diameter of the connecting sleeve are arranged at both ends of the inner side of the semicircular chuck, and the spacing of the semicircular steps matches the total length of the two reinforcing hoops after they are mounted on the connecting sleeve according to the design requirements; the height and installation position of the tightening mechanism are based on the fact that when the tightening mechanism is in the tightening state, the notch of the cylinder or piston end is in close contact with the outer circle of the connecting sleeve and the axis of the connecting sleeve is parallel to the surface of the substrate.

2. The method for manufacturing a motorcycle rear shock absorber assembly according to claim 1, characterized in that: The oil cylinder or piston end of the motorcycle rear shock absorber is provided with an axial circular blind hole, the outer diameter of the semi-cylindrical clamp of the reinforcing hoop matches the inner diameter of the blind hole of the oil cylinder or piston end; and a semi-circular notch whose radius matches the outer diameter of the hollow cylinder of the reinforcing hoop is provided at the end of the oil cylinder or piston; at the same time, the manufacturing steps are adjusted accordingly, including: S3, the openings of the two reinforcing hoops are relatively mounted on the connecting sleeve, and the sides of the two semi-cylindrical hoops are in close contact, that is, the two semi-cylindrical hoops form a whole cylinder and there is no gap between the openings; S4, placing the connecting sleeve with the reinforcing hoop in the semicircular chuck at the front end of the push rod of the tightening mechanism, pulling the rocker of the tightening mechanism, the push rod moves forward to insert the hollow cylinder composed of the two semi-cylindrical clamps into the blind hole of the end of the oil cylinder or piston of the rear shock absorber of the motorcycle to be welded, and making the circular part of the end of the oil cylinder or piston closely contact with the outer circle of the reinforcing hoop; because the hollow cylinder composed of the two semi-cylindrical clamps of the reinforcing hoop is inserted into the blind hole of the end of the oil cylinder or piston, it is called an internal insertion reinforcing hoop; S5. Use manual or mechanical means to weld the sides of the openings of the two semi-cylindrical clamps together, weld the notch of the cylinder or piston end to the outer circle of the reinforcing clamp, and weld the edge of the hollow cylinder of the reinforcing clamp to the outer circle of the connecting sleeve.

3. The method for manufacturing a motorcycle rear shock absorber assembly according to claim 1 or 2, characterized in that: The reinforcing hoop is formed by stamping a metal plate with a thickness of 2-5 mm.

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