Tension motor energy-absorbing bow protector and mounting method

Abstract

The application discloses a tensile motorcycle energy-absorbing handlebar protection and a mounting method, left and right handlebars are installed at the innermost end of the handlebar, an energy-absorbing spring is placed in the handlebar, and the thin end of the inserted rod is inserted into the hex hole of the handlebar to press the energy-absorbing spring. When the tensile motorcycle reverses, the energy-absorbing spring is compressed, the impact force is reduced, the handlebar is prevented from being broken, and the risk of deformation or breakage of the handlebar is further reduced. The tensile motorcycle has a high speed, and when falling down, the motorcycle will slide, and the side protection plate and the plug can effectively protect the motorcycle. According to the air temperature and the speed requirement, the wind shield is selected and mounted.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of motorcycle handlebar protection, and particularly relates to a motorcycle energy-absorbing handlebar guard and a mounting method. BACKGROUND

[0002] Motorcycles are now increasingly popular, and many people like to ride motorcycles to travel around the world. However, long-distance riding is risky, and complex road conditions can easily lead to emergencies and crashes. When the motorcycle crashes, the handlebar usually hits the ground first. Because the motorcycle has a large momentum P at the moment of the handlebar hitting the ground, a large impact force is generated, which can easily cause the handlebar to deform or even break. In addition, the motorcycle handlebar has a clutch handle and a brake handle. When the motorcycle crashes, the front wheel will tilt in the direction of the crash, and the uneven ground may have hard objects such as stones. After the crash, the clutch handle or the brake handle can be easily damaged. The speed of a motorcycle is generally high, and the wind has a greater impact on the hands. Therefore, it is necessary to reduce the impact of the wind. SUMMARY

[0003] The present application aims to provide a motorcycle energy-absorbing handlebar guard and an adjusting method to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] A motorcycle energy-absorbing handlebar guard, comprising a right bending rod, a left bending rod, a plug rod, an energy-absorbing spring, a cross rod, and a wind shield, wherein the small end of the right bending rod and the left bending rod is fixed on a fixed clamp through a pin, and the fixed clamp is fixed on the innermost end of the handlebar through a pin;

[0006] The energy-absorbing spring is installed in the deepest part of the large end hole of the right bending rod and the left bending rod, and the hexagonal end of the plug rod is inserted into the end hole of the right bending rod and the left bending rod, respectively;

[0007] The other end of the cross rod is connected to the plug rod through a pin, and the other end of the cross rod is connected to the end through a pin;

[0008] The end is fixed on the two end holes of the handlebar through a handlebar screw;

[0009] The handlebar screw generates a large friction force with the inner wall of the handlebar through the wedge force of the wedge-shaped nut and the wedge-shaped tube, and the end is fixed;

[0010] A plug is fixed on the outer end of the end through a thread;

[0011] The cross rod is sleeved with a side guard plate and positioned through a pin;

[0012] The left bending rod and the right bending rod are sleeved with a wind shield.

[0013] As a further aspect of the present invention: the inside of the fixing clamp is an arc smaller than a semicircle, and small grooves are evenly distributed; both sides of the fixing clamp have bosses, and the two bosses have threaded holes symmetrically arranged in the center; one side of the boss has cutting, the width of the cutting surface is the same as the boss, the length is less than the length of the boss, and all of it is cut off near the outer edge.

[0014] As a further aspect of the present invention: the right and left curved rods are three-way bends, with large and small ends at both ends and a middle end in the middle. The large end has a deep hole at its center, and the inner end of the deep hole is a circular hole. The energy-absorbing spring is placed inside the circular hole. The outer diameter of the energy-absorbing spring is slightly smaller than the outer diameter of the deep hole. The outer end of the deep hole is a hexagonal hole, and the hexagonal inscribed circle of the hexagonal hole is larger than the diameter of the circular hole of the deep hole. The right and left curved rods are symmetrical about the bottom surface of the large end and are respectively installed on the left and right sides of the handlebar. The cross-section of the right and left curved rods is a square, and the four corners of the square are chamfered. The small end has a through hole, and the two sides of the small end have rounded corners. The diameter of the rounded corners is the same as the side length of the cross-section square. The center of the through hole and the center of the rounded corner coincide. The insertion rod is divided into a thick end and a thin end. The thick end has a square cross-section with chamfered corners, while the thin end has a regular hexagonal cross-section. The inscribed circle of the hexagonal cross-section is slightly smaller than the inscribed circle of the regular hexagonal hole at the large end of the right-bent rod. The connection between the thick and thin ends has rounded corners, and their central axes are coaxial. The top of the thin end has a small frustum. The head of the thick end of the insertion rod has a U-shaped groove, the upper plane of which is parallel to the top of the insertion rod, and a through-threaded hole perpendicular to the U-shaped groove. The bottom of the U-shaped groove is not flat but a herringbone-shaped double-symmetrical slope with a higher center. The head of the thick end of the insertion rod has double-sided rounded corners, the diameter of which is the same as the width of the insertion rod, and the center of which coincides with the center of the through-threaded hole. The length of the hexagonal thin end of the insertion rod is the same as the depth of the hexagonal hole at the large end of the right-bent rod. The hexagonal thin end of the insertion rod is inserted into the hexagonal holes at the large ends of the right and left-bent rods to press an energy-absorbing spring.

[0015] As a further aspect of the present invention: the crossbar is characterized in that its two ends are divided into a convex end and a concave end. The convex end has a vertical through hole, and the head has a rounded corner with the same center as the through hole. The diameter of the rounded corner is the same as the length of the square cross-section of the crossbar. The protrusion of the convex end matches the U-shaped groove of the insertion rod, and the bottom of the convex end has a herringbone-shaped double symmetrical inclined surface. The concave end of the crossbar has a through threaded hole. The aforementioned side guard plate is fitted onto the crossbar and is limited by the pin at the concave end.

[0016] As a further aspect of the present invention: the end cap has a knurled groove on its bottom surface, a through hole at the center of the bottom, the diameter of the through hole being slightly larger than the outer diameter of the handlebar screw, and a coarse threaded hole coaxial with the through hole at the upper end of the end cap; the end cap body is rectangular with rounded corners, a boss on the short side facing outwards, the boss facing the left side of the end cap, the boss having a transverse through hole, the lower corner of the boss being rounded, the center of the boss coinciding with the center of the through hole, and the thickness of the boss matching the concave end of the crossbar; the plug is similar to a screw, with threads matching the aforementioned coarse threaded hole, and the top of the plug having an internal hexagonal groove.

[0017] As a further aspect of the present invention: the wedge nut is cylindrical in shape and has a beveled cut, with the bottom of the bevel cut being more than one-third higher than the height of the wedge nut. Its outer diameter is slightly smaller than the diameter of the handlebar inner hole, and it has a through threaded hole in the center perpendicular to the bottom surface, which can be matched with the aforementioned handlebar screw. The knurling on the outer surface of the wedge nut increases friction. The top of the wedge tube is beveled at less than 30 degrees, with the bottom of the bevel cut being more than one-third higher than the height of the wedge tube. The knurling on the outer surface also increases friction.

[0018] The aforementioned energy-absorbing guard for a rally motorcycle and its installation method include fixing the upper end of the fixing clip as close as possible to the center of the handlebars, with the protrusion facing directly in front of the motorcycle's front wheel; the insert rods are respectively installed in the hexagonal holes at the large ends of the right and left curved rods, containing energy-absorbing springs that are slightly compressed. When the handlebars are too long, the energy-absorbing springs may not be compressed, requiring the placement of small nuts or washers at the bottom of the energy-absorbing springs to increase pressure; when the handlebars are too short, the internal energy-absorbing springs are over-compressed, reducing the stroke of the insert rods and affecting the energy absorption effect. In this case, a small portion of the large ends of the right and left curved rods can be cut off, along with the same length of the insert rods, and small washers can be used to improve the pressure of the energy-absorbing springs.

[0019] Compared with existing technologies, the advantages of this invention are as follows: the left and right turn handlebars are installed at the innermost part of the handlebars. An energy-absorbing spring is placed inside the turn handlebar, and the thin end of the insert rod is hexagonally inserted into the hexagonal hole of the turn handlebar to press down the energy-absorbing spring. When the adventure motorcycle reverses, the energy-absorbing spring is compressed, reducing the impact force and preventing the handlebars from breaking, further reducing the risk of handlebar deformation or breakage. Adventure motorcycles travel at high speeds, and falls are often accompanied by slippage; the side guards and end caps effectively protect against this. A windshield is also optional, depending on the temperature and speed requirements. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the installation structure for the energy-absorbing protective pantograph on a rally motorcycle.

[0021] Figure 2 A schematic diagram of the right handlebar connection structure for an energy-absorbing protective bow on a rally motorcycle (including the windshield).

[0022] Figure 3 This is a schematic diagram of the left handlebar connection structure for an energy-absorbing guardrail on a rally motorcycle (excluding the windshield).

[0023] Figure 4 This is an exploded view of the handlebar fasteners.

[0024] Figure 5 A schematic diagram and a half-section view AA showing the independent connection of the insert and crossbar.

[0025] Figure 6 This is a schematic diagram showing the connection between the insert rod, crossbar, and side guard plate.

[0026] In the diagram: Energy-absorbing guard 1, handlebars 2, seat 3, rear wheel 4, front wheel 5, engine 6, front shock absorber 7, brake lever 8, clutch lever 9, windshield 91, fixing clip 113, right bend bar 123, left bend bar 124, insert bar 131, crossbar 141, side guard plate 142, end cap 152, plug 172, wedge nut 183, wedge tube 185, energy-absorbing spring 192, pin 194, handlebar screw 195. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the invention.

[0028] like Figures 1-3 The figure shows a schematic diagram of the installation structure of a rally motorcycle with an energy-absorbing guard 1 according to an embodiment of the present invention. The upper end of the energy-absorbing guard 1 is mounted on the handlebars 2. The front wheel 5 is in the direction of the front of the vehicle. The seat 3 and the rear wheel 4 are located at the rear of the motorcycle. The engine 6 is mounted in the center of the motorcycle. The brake lever 8 is on the right side of the handlebars 2, and the clutch lever 9 is on the left side of the handlebars 2.

[0029] like Figures 2-3 As shown, a pull motorcycle energy-absorbing guard includes a right curved rod 123, a left curved rod 124, a plug rod 131, an energy-absorbing spring 192, a crossbar 141, and a windshield 91. The small ends of the right curved rod 123 and the left curved rod 124 are fixed to the fixing clip 113 by pins 194. The fixing clip 113 is fixed to the left and right sides of the innermost end of the handlebar 2 by pins 194.

[0030] like Figure 4 As shown, the end 152 is fixed to the holes at both ends of the handlebar 2 by the handlebar screw 195; the handlebar screw 195 generates a huge friction force with the inner wall of the handlebar 2 through the wedge force of the wedge nut 183 and the wedge tube 185, thus fixing the end 152.

[0031] like Figure 3 , 5As shown, the right-bend rod 123 and the left-bend rod 124 are three-way bends, with large and small ends at both ends and a middle end in the middle. The large end has a deep hole at its center, and the inner end of the deep hole is a round hole. The energy-absorbing spring 192 is placed inside the round hole. The outer diameter of the energy-absorbing spring 192 is slightly smaller than the outer diameter of the deep hole. The outer end of the deep hole is a hexagonal hole, and the hexagonal inscribed circle of the hexagonal hole is larger than the diameter of the round hole of the deep hole. The right-bend rod 123 and the left-bend rod 124 are symmetrical about the bottom surface of the large end and are installed on the left and right sides of the handlebar 2 respectively. The cross-section of the right-bend rod 123 and the left-bend rod 124 is a square, and the four corners of the square are chamfered. The small end has a through hole, and the two sides of the small end have rounded corners. The diameter of the rounded corners is the same as the side length of the cross-section square. The center of the small end has a through hole, and the center of the hole coincides with the center of the rounded corner. The insertion rod 131 is divided into a thick end and a thin end. The cross-section of the thick end is square with chamfered corners, and the cross-section of the thin end is a regular hexagon. The inscribed circle of the regular hexagon is slightly smaller than the inscribed circle of the regular hexagonal hole at the large end of the right-bent rod 123. There are rounded corners at the connection between the thick end and the thin end. The central axes of the thick end and the thin end are coaxial. There is a small frustum at the top of the thin end. The head of the thick end of the insertion rod 131 has a U-shaped groove. The upper plane of the U-shaped groove is parallel to the top of the insertion rod 131 and has a through threaded hole perpendicular to the U-shaped groove. The bottom of the U-shaped groove is not a plane, but a herringbone-shaped double symmetrical inclined plane with a higher middle section. The head of the thick end of the insertion rod 131 has double rounded corners. The diameter of the rounded corners is the same as the width of the insertion rod 131. The center of the rounded corners coincides with the center of the through threaded hole. The length of the hexagonal thin end of the insertion rod 131 is the same as the depth of the hexagonal hole at the large end of the right-bent rod 123. The hexagonal thin end of the insertion rod 131 is inserted into the hexagonal hole at the large end of the right bent rod 123 and the left bent rod 124 to press the energy-absorbing spring 192.

[0032] like Figure 2 , 6 As shown, the crossbar 141 has two ends, a convex end and a concave end. The convex end has a vertical through hole, and the head has a rounded corner with the same center as the through hole. The diameter of the rounded corner is the same as the length of the square cross-section of the crossbar 141. The protrusion of the convex end matches the U-shaped groove of the insertion rod 131. The bottom of the convex end has a herringbone double symmetrical bevel. The concave end of the crossbar 141 has a through threaded hole. The aforementioned side guard plate 142 is fitted onto the crossbar 141 and is limited by the pin 194 at the concave end. The side guard plate cannot move backward after being impacted, thus better protecting the crossbar during sliding.

[0033] like Figure 4 , 6As shown, the end cap 152 has knurled grooves on its bottom surface and a through hole at the center of its bottom. The diameter of the through hole is slightly larger than the outer diameter of the handlebar screw 195. The upper end of the end cap 152 has a coarse threaded hole coaxial with the through hole. The main body of the end cap 152 is rectangular with rounded corners. There is a boss on the short side facing outwards, with the boss facing the left side of the end cap 152. The boss has a transverse through hole, and the lower corner of the boss is rounded. The center of the boss coincides with the center of the through hole. The thickness of the boss matches the concave end of the crossbar 141. The plug 172 is similar to a screw, with threads that match the aforementioned coarse threaded hole. The top of the plug 172 has an internal hexagonal groove. When the pull motorcycle tipps over, the plug 172 can effectively protect the end cap 152. When the plug 172 is severely damaged by friction, the plug 172 can be replaced separately, thus protecting the energy-absorbing guard 1 at a relatively low cost.

[0034] like Figure 6 As shown, the wedge nut 183 is a cylindrical body with a beveled cut. The bottom of the beveled cut is more than one-third higher than the height of the wedge nut 183. Its outer diameter is slightly smaller than the diameter of the handlebar inner hole. It has a through-threaded hole with a vertical bottom surface in the center, which can be matched with the handlebar screw 195. The knurled outer surface of the wedge nut 183 increases friction. The top of the wedge tube 185 is beveled at less than 30 degrees, and the bottom of the beveled cut is more than one-third higher than the height of the wedge tube 185. The knurled outer surface also increases friction. When the handlebar screw 195 is tightened, the wedge nut 183 will press the wedge tube 185, which will be tightly fixed in the inner hole of the handlebar 2 and press the end 152. Due to the huge pulling force and the knurled groove at the bottom of the end 152, the end 152 cannot rotate relative to the two ends of the handlebar 2. In this way, when the motorcycle falls, the crossbar 141 cannot swing up and down, preventing the brake lever 8 or clutch lever 9 from contacting the ground and breaking.

[0035] The above-mentioned energy-absorbing pantograph and installation method for a rally motorcycle, combined with Figures 1-6This includes: the fixing clip 113 is fixed as close as possible to the center of the handlebar 2, so that when the motorcycle falls, the guard and the handlebar 2 share the impact force. The thickest and strongest energy-absorbing guard 1 is installed at the center of the handlebar 2, so that the impact force arm on the handlebar 2 is minimized, and the handlebar is better protected; the insert rod 131 is installed in the large hexagonal hole of the right bend rod 123 and the left bend rod 124 respectively, and there is an energy-absorbing spring 192 inside and it is in a slightly compressed state. When the handlebar is too long, the energy-absorbing spring 192 will not be compressed. At this time, a small nut or a small washer needs to be placed at the bottom of the energy-absorbing spring (192) to increase the pressure; when the handlebar is too short, the internal energy-absorbing spring 192 is in an over-compressed state and the stroke of the insert rod 131 will be reduced, affecting the energy absorption effect. A small part of the large end of the right bend rod 123 and the left bend rod 124 can be cut off respectively, and the same length of the insert rod 131 can be cut off. The pressure of the energy-absorbing spring 192 can be improved by combining it with a small washer. When installing the aforementioned crossbar 141, the angle should be referenced to the installation angle of the clutch lever 9 and the brake lever 8, so that the energy-absorbing protective arch 1 completely surrounds the clutch lever 9 and the brake lever 8. This will prevent the clutch lever 9 and the brake lever 8 from contacting the ground and breaking or deforming when the motorcycle is reversing.

[0036] The working principle of this invention is as follows: by placing energy-absorbing springs 192 in the right curved rod 123 and the left curved rod 124, the thin end of the insert rod 131 is hexagonally inserted into the hexagonal holes of the right curved rod 123 and the left curved rod 124 to press down the energy-absorbing springs 192. When the rally motorcycle reverses to the left, due to the influence of gravity on the front wheel, the handlebars 2 will tilt to the left. When the handlebars 2 touch the ground, the insert rod 131 will contact the ground immediately and compress the energy-absorbing springs 192, reducing the impact force. This can greatly reduce the impact force on the handlebars 2 and effectively protect the clutch lever 9. The handlebar screw 195 increases the contact area with the inner wall of the handlebar 2 through the wedge clamping force of the wedge nut 183 and the wedge tube 185. After clamping, there will be huge friction force, which prevents the end 152 from rotating and prevents the crossbar 141 from swinging along the axis of the handlebar 2. Combined with the constraint force of the fixing clip 113 on the movement direction of the right bend bar 123 and the left bend bar 124, it further protects the brake lever 8 and the clutch lever 9.

[0037] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the protection scope of this invention.

Claims

1. A tensile motorcycle energy-absorbing bow protector, comprising a right bending rod (123), a left bending rod (124), a plug rod (131), an energy-absorbing spring (192), a cross rod (141), and a wind shield (91), the small end of the right bending rod (123) and the left bending rod (124) is fixed on the fixed clamp (113) through the pin (194), and the fixed clamp (113) is fixed on the innermost end of the handlebar (2) through the pin (194); the energy-absorbing spring (192) is installed in the deepest hole of the large end of the right bending rod (123) and the left bending rod (124), and the hexagonal end of the plug rod (131) is inserted into the end hole of the right bending rod (123) and the left bending rod (124) respectively; the cross rod (141) is connected to the other end of the plug rod (131) through the pin (194), and the other end of the cross rod (141) is connected to the end head (152) through the pin (194); the end head (152) is fixed on the hole of the handlebar (2) through the handlebar screw (195); the handlebar screw (195) generates a large friction force with the inner wall of the handlebar (2) through the wedge force of the wedge-shaped nut (183) and the wedge-shaped tube (185), and fixes the end head (152); the end head (152) is externally threaded with a plug (172); the cross rod (141) is sleeved with a side guard plate (142) and is positioned through the pin (194); the left bending rod (124) and the right bending rod (123) are sleeved with the wind shield (91); the fixed clamp (113) is internally arc-shaped and smaller than a semicircle, and uniformly distributed small grooves; the fixed clamp (113) has bosses on both sides, and the bosses on both sides are symmetrically provided with threaded holes, the boss on one side is cut, the cutting surface width is consistent with the boss, the length is smaller than the boss length, and the outer edge is completely cut.

2. A tensile motor energy-absorbing bow guard according to claim 1, characterized in that The right bending rod (123) and the left bending rod (124) are three-way bending, and both ends are large and small ends, and the middle is a middle end. The center of the large end has a deep hole, the end of the deep hole is a round hole, the energy absorbing spring (192) is placed in the round hole, the outer diameter of the energy absorbing spring (192) is slightly smaller than the outer diameter of the deep hole, the outer end of the deep hole is a hexagonal hole, the hexagonal hole is larger than the diameter of the round hole of the deep hole; The right bending rod (123) and the left bending rod (124) are symmetrical to the bottom surface of the large end, and are respectively installed on the left and right sides of the handlebar (2); The transverse section of the right bending rod (123) and the left bending rod (124) is a square, and the four corners of the square are chamfered; The small end has a through hole, and the two sides of the small end have a round corner, the diameter of the round corner is the same as the length of the square cross section, the small end has a through hole, and the center of the hole coincides with the center of the round corner; The two ends of the plug rod (131) are divided into thick end and thin end, the thick end is square in transverse section and has chamfered corners at four corners, and the thin end is a regular hexagon in transverse section, the inscribed circle of the regular hexagon is slightly smaller than the inscribed circle of the regular hexagonal hole of the large end of the right bending rod (123), the thick end and the thin end are coaxial, and the thin end has a small circular platform at the top; The thick end of the plug rod (131) has a U-shaped groove, the upper surface of the U-shaped groove is parallel to the upper surface of the plug rod (131), and there is a through threaded hole perpendicular to the U-shaped groove, the bottom of the U-shaped groove is not flat, and the bottom is a double-symmetrical inclined surface with high middle; The thick end of the plug rod (131) has a double-face round corner, the diameter of the round corner is consistent with the width of the plug rod (131), and the center of the round corner coincides with the center of the through threaded hole, the length of the hexagonal thin end of the plug rod (131) is consistent with the depth of the hexagonal hole of the large end of the right bending rod (123); The hexagonal thin end of the plug rod (131) is inserted into the hexagonal hole of the large end of the right bending rod (123) and the left bending rod (124) to press the energy absorbing spring (192); The two ends of the horizontal rod (141) are divided into convex end and concave end, the convex end has a vertical through hole, the head has a round corner with the same center as the through hole, and the diameter of the round corner is consistent with the length of the square cross section of the horizontal rod (141), the convex end protruding platform matches the U-shaped groove of the plug rod (131), and the bottom of the convex end is a double-symmetrical inclined surface; The concave end of the horizontal rod (141) has a through threaded hole, the side guard plate (142) is sleeved on the horizontal rod (141), and the limit is limited by the pin (194) of the concave end; The bottom surface of the end head (152) has a knurled groove, and the center of the bottom has a through hole, the diameter of the through hole is slightly larger than the outer diameter of the handlebar screw (195), and the upper end of the end head (152) has a coarse threaded hole coaxial with the through hole; The main body of the end head (152) is rectangular and the four corners are chamfered, the short side has a convex platform outward, the direction of the convex platform is the left side of the end head (152), the convex platform has a transverse through hole, the lower corner of the convex platform is a round corner, the center of the round corner coincides with the center of the through hole, and the thickness of the convex platform matches the concave end of the horizontal rod (141); The plug (172) is similar to a screw, and has a thread matched with the above-mentioned coarse threaded hole, and the top of the plug (172) has an internal hexagonal groove.

3. A tensile energy motor absorbing bow according to claim 2, characterized in that The wedge nut (183) is a whole cylinder with a bevel, and the bevel bottom is higher than one third of the height of the wedge nut (183), the outer diameter is slightly smaller than the inner hole diameter of the handle, and the center has a vertical bottom penetrating threaded hole that can match the handle screw (195), the outer surrounding surface of the wedge nut (183) is knurled to increase friction; the wedge pipe (185) top is less than 30 degrees bevel, and the bevel bottom is higher than one third of the height of the wedge pipe (185), and the outer surrounding surface is knurled to increase friction.

4. The method of installing a tensile energy absorbing bow protector according to claim 3, wherein: The upper end of the fixed clamp (113) is fixed near the center of the handle (2), and the boss direction is directly in front of the front wheel of the motorcycle; the insertion rod (131) is respectively installed in the large end hexagonal hole of the right bending rod (123) and the left bending rod (124), and the inside has an energy absorbing spring (192) and is in a slightly compressed state, when the handle is too long, the energy absorbing spring (192) will not be compressed, at this time, a small nut or a small gasket needs to be placed at the bottom of the energy absorbing spring (192) to increase the pressure; when the handle is too short, the internal energy absorbing spring (192) is in an over-tight state, the stroke of the insertion rod (131) will be smaller, affecting the energy absorbing effect, a small part of the large end of the right bending rod (123) and the left bending rod (124) can be cut off respectively, and the same length of the insertion rod (131) is also cut off, and the energy absorbing spring (192) pressure is improved by combining a small gasket.

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