A vibration test device for electric bicycle frame

Abstract

The present invention belongs to the technical field of vehicle test equipment, and in particular, is an electric bicycle frame vibration test device, comprising a bottom plate, a pair of frame plates fixed on the top of the bottom plate, a support shaft inserted in the pedal mounting hole of the frame, a first pillar inserted in the seat cushion mounting hole of the frame, a second pillar inserted in the faucet mounting hole of the frame, a front wheel installed at the bottom end of the second pillar, a rear wheel installed in the rear wheel mounting hole of the frame, two brackets fixed to the rear of the bottom plate, an electric push rod fixed at the top of the bracket, a pressure plate elastically connected to the output shaft of the electric push rod, two pressure plates respectively located above the first pillar and the second pillar, and a driving assembly is also provided on the bottom plate. In the present invention, the pressure plates are driven downward by two electric push rods respectively, so that the two pressure plates are pressed on the top of the first pillar and the second pillar with different pressures respectively, so that the weight acting on different positions of the frame can be directly adjusted by the pressure plates.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle testing equipment, and in particular to a vibration testing device for an electric bicycle frame. Background Art

[0002] The forms and shapes of electric vehicle frames are becoming more diverse and more personalized; accordingly, higher requirements are placed on the frame strength and rigidity, and the vibration endurance strength of the frame is also facing a huge test.

[0003] When using the existing electric bicycle frame vibration test device, counterweights of different weights are manually added to the frame seat mounting holes and the frame handlebar mounting holes to replace the force applied by the human body to the frame seat and the handlebar position. This makes it particularly troublesome to adjust the counterweight, so corresponding improvements are made to address this problem. Summary of the invention

[0004] Based on the technical problems existing in the prior art, the present invention proposes a vibration testing device for an electric bicycle frame.

[0005] The present invention provides an electric bicycle frame vibration test device, comprising a bottom plate, a pair of frame plates are fixed on the top of the bottom plate, an opening is opened on the top of the frame plate, a support shaft which can be inserted into the opening is inserted in the pedal mounting hole of the frame, a first pillar is inserted in the seat mounting hole of the frame, a second pillar is inserted in the faucet mounting hole of the frame, a front wheel is detachably mounted on the bottom end of the second pillar, a rear wheel is detachably mounted in the rear wheel mounting hole of the frame, two L-shaped brackets are fixed to the rear of the bottom plate, a downward electric push rod is fixed on the top of the bracket, a pressure plate is elastically connected to the output shaft of the electric push rod, the two pressure plates are respectively located above the first pillar and the second pillar, and a drive Rotation assembly, the driving rotation assembly is used to drive the rear wheel and the front wheel to rotate, insert the support shaft into the footrest mounting hole of the frame, and then place the support shaft between the two openings, then insert the first pillar and the second pillar downward into the seat mounting hole and the faucet mounting hole respectively, and then install the front wheel and the rear wheel to the bottom end of the second pillar and the rear wheel mounting hole of the frame respectively, and then drive the pressure plate downward by two electric push rods respectively, so that the two pressure plates are pressed on the top of the first pillar and the second pillar with different pressures respectively, and finally start the driving rotation assembly to drive the front wheel and the rear wheel to rotate, and the frame vibration test can be carried out, so that the weight acting on different positions of the frame can be directly adjusted by the pressure plate.

[0006] Preferably, a pair of guide pillars are fixed on the top of the pressure plate, the output shaft of the electric push rod is connected to a cross plate, a pair of guide holes for inserting the guide pillars are opened on the cross plate, a first spring is sleeved on the guide pillars, and the two ends of the first spring are respectively fixedly connected to the cross plate and the pressure plate. The first spring can make the pressure plate elastically move under the cross plate, and the pressure plate can be stably limited by the cooperation of the guide pillars and the guide holes.

[0007] Preferably, rollers are respectively installed at the top ends of the first and second pillars to form rolling contact with the corresponding pressure plates. By providing the rollers, the wear between the top ends of the first and second pillars and the pressure plates can be reduced when the frame vibrates.

[0008] Preferably, the driving assembly includes a shell fixed on the top of the base plate, a main shaft and a main wheel for driving the rear wheel to rotate are rotatably connected in the shell, at least one protrusion is provided on the circumferential outer wall of the main wheel, a motor is fixed on the side of the shell, the motor output shaft is connected to the end of the main shaft, the same end of the main wheel and the main shaft are fixedly sleeved with a pulley, the two pulleys are connected by a belt, an axle seat 1 is fixed at one end of the top of the base plate close to the front wheel, a secondary wheel for driving the front wheel to rotate is rotatably connected on the axle seat 1, the secondary wheel and the main shaft are connected by a transmission assembly, the motor is started, the motor output shaft drives the main shaft to rotate, and then the main shaft will drive the main wheel to rotate through the transmission cooperation between the pulley and the belt, and the main wheel will drive the rear wheel to rotate, and when the main wheel rotates, the frame can vibrate through the protrusion, the main shaft will drive the secondary wheel to rotate through the transmission assembly, and then the secondary wheel can drive the front wheel to rotate.

[0009] Preferably, the transmission assembly includes a transmission shaft, which is mounted on two mounting seats, and the mounting seats are fixed on the top of the base plate. The adjacent ends of the transmission shaft and the main shaft are fixedly sleeved with mutually meshing bevel gears 1, and the adjacent ends of the transmission shaft and the secondary wheel are fixedly sleeved with mutually meshing bevel gears 2. When the main shaft rotates, the transmission shaft is driven to rotate through the meshing transmission of the two bevel gears 1, and then the transmission shaft drives the secondary wheel to rotate through the meshing transmission of the two bevel gears 2.

[0010] Preferably, counterweights of different specifications are hung on the support shaft, and both ends of the support shaft are threadedly connected with screw sleeves for tightening the counterweight. A T-shaped clamping rod is fixed on the top of the base plate, and the top of the clamping rod can be inserted into the U-shaped notch on the counterweight. Counterweights of different specifications are hung on the support shaft, and then the screw sleeve is tightened, and the clamping rod is inserted into the U-shaped notch to prevent the counterweight from deflecting around the support shaft. In this way, the counterweight can replace the force exerted on the frame by a person stepping on the pedals when riding.

[0011] Preferably, the front wheel is fixed to the bottom end of the second pillar by a plurality of bolts, so that the front wheel can be detachably mounted on the bottom end of the second pillar.

[0012] Preferably, both ends of the rear wheel are threadedly connected with nuts for tightening against the frame, so that the rear wheel can be detachably mounted at the rear wheel mounting hole of the frame.

[0013] Preferably, a guide rail capable of moving laterally is provided on the top of the base plate, a slider is slidably connected in the guide rail, one end of the slider is fixed with a second spring, the other end of the second spring is fixed to the inner wall of the guide rail, a rack is fixed on the top of the slider, a fixed sleeve on the second pillar is provided with a gear cylinder capable of meshing with the rack, and a fixed sleeve on the transmission shaft is provided with a cam capable of contacting with the slider, and the guide rail is moved along the base plate until the rack and the gear cylinder are meshed, so that when testing, the rotating transmission shaft will synchronously drive the cam to rotate, and then the cam will periodically push the slider inward, and then cooperate with the second spring to push the slider to reset and move, so that the slider will synchronously drive the rack to move back and forth, and the rack will engage the gear cylinder to drive the second pillar to rotate back and forth, thereby simulating the rotation of the handlebar during riding, so that the experimental conditions of the frame are more in line with the actual riding state.

[0014] Preferably, the guide rail is slidably connected to the base plate, a shaft seat 2 is fixed on the top of the base plate, a screw is rotatably connected to the shaft seat 2, the screw is threadedly connected to the guide rail, and the screw can be driven to move by rotating the screw, thereby facilitating the engagement and separation between the rack and the gear cylinder.

[0015] Compared with the prior art, the present invention provides an electric bicycle frame vibration test device, which has the following beneficial effects:

[0016] 1. An electric bicycle frame vibration test device, by setting a pressure plate, driving the pressure plate downward by two electric push rods, so that the two pressure plates are pressed on the top of the first pillar and the second pillar with different pressures, and finally starting the driving assembly to drive the front wheel and the rear wheel to rotate, the frame vibration test can be carried out, so that the weight acting on different positions of the frame can be directly adjusted by the pressure plate.

[0017] 2. A vibration test device for an electric bicycle frame, which prevents the counterweight from deflecting around the support shaft by setting a counterweight, hanging counterweights of different specifications on the support shaft, and then tightening the screw sleeve and inserting the clamping rod into the U-shaped notch. In this way, the counterweight can replace the force exerted on the frame by a person stepping on the pedals when riding.

[0018] 3. A vibration test device for an electric bicycle frame, which moves the guide rail along the bottom plate by setting a rack and a gear cylinder until the rack and the gear cylinder are engaged. In this way, when testing, the rotating transmission shaft will synchronously drive the cam to rotate, and then the cam will periodically push the slider inward, and then cooperate with the second spring to push the slider to reset. In this way, the slider will synchronously drive the rack to move back and forth, and the rack will engage the gear cylinder to drive the second pillar to rotate back and forth, thereby simulating the rotation of the handlebar during riding, so that the experimental conditions for the frame are more in line with the actual riding state. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of an electric bicycle frame vibration testing device proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the back structure of an electric bicycle frame vibration testing device proposed by the present invention;

[0021] Figure 3 A schematic diagram of the frame installation of an electric bicycle frame vibration testing device proposed by the present invention;

[0022] Figure 4 A schematic diagram of the installation between the first support, the second support and the frame of an electric bicycle frame vibration test device proposed by the present invention;

[0023] Figure 5 For the present invention Figure 1 A schematic diagram of the enlarged structure at point A;

[0024] Figure 6 A schematic diagram of the housing structure of an electric bicycle frame vibration testing device proposed by the present invention;

[0025] Figure 7 For the present invention Figure 3 A schematic diagram of the enlarged structure at B;

[0026] Figure 8 For the present invention Figure 4 A schematic diagram of the enlarged structure at C;

[0027] Fig. 9 For the present invention Figure 4 A schematic diagram of the structure at D of FIG.

[0028] Fig.10 This is a schematic diagram of the guide rail structure of an electric bicycle frame vibration testing device proposed by the present invention.

[0029] In the figure: 1. bottom plate; 2. frame plate; 3. opening; 4. support shaft; 5. first pillar; 6. second pillar; 7. rear wheel; 8. front wheel; 9. bracket; 10. electric push rod; 11. cross plate; 12. pressure plate; 13. guide pillar; 14. first spring; 15. guide hole; 16. roller; 17. housing; 18. motor; 19. main shaft; 20. main wheel; 21. pulley; 22. belt; 23. shaft seat 1; 24. secondary wheel; 25. mounting seat; 26. transmission shaft; 27. bevel gear 1; 28. bevel gear 2; 29. ​​counterweight; 30. screw sleeve; 31. clamping rod; 32. nut; 33. guide rail; 34. slider; 35. rack; 36. gear cylinder; 37. second spring; 38. shaft seat 2; 39. screw; 40. cam. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0032] Reference Figure 1-Figure 10A vibration test device for an electric bicycle frame comprises a bottom plate 1, a pair of frame plates 2 are fixed on the top of the bottom plate 1, an opening 3 is opened on the top of the frame plate 2, a support shaft 4 which can be inserted into the opening 3 is inserted in the pedal mounting hole of the frame, a first pillar 5 is inserted in the seat mounting hole of the frame, a second pillar 6 is inserted in the faucet mounting hole of the frame, a front wheel 8 is detachably mounted on the bottom end of the second pillar 6, a rear wheel 7 is detachably mounted in the rear wheel mounting hole of the frame, two L-shaped brackets 9 are fixed to the rear of the bottom plate 1, a downward electric push rod 10 is fixed on the top of the bracket 9, a pressure plate 12 is elastically connected to the output shaft of the electric push rod 10, and the two pressure plates 12 are respectively located above the first pillar 5 and the second pillar 6, and a driving assembly is also provided on the bottom plate 1 The driving assembly is used to drive the rear wheel 7 and the front wheel 8 to rotate, insert the support shaft 4 into the footrest mounting hole of the frame, and then place the support shaft 4 between the two openings 3, then insert the first pillar 5 and the second pillar 6 downward into the seat mounting hole and the faucet mounting hole respectively, and then install the front wheel 8 and the rear wheel 7 to the bottom end of the second pillar 6 and the rear wheel mounting hole of the frame respectively, and then drive the pressure plate 12 downward by two electric push rods 10 respectively, so that the two pressure plates 12 are pressed on the top of the first pillar 5 and the second pillar 6 with different pressures respectively, and finally start the driving assembly to drive the front wheel 8 and the rear wheel 7 to rotate, and the frame vibration test can be carried out, so that the weight acting on different positions of the frame can be directly adjusted by the pressure plate 12.

[0033] Among them, a pair of guide pillars 13 are fixed on the top of the pressure plate 12, the output shaft of the electric push rod 10 is connected to the cross plate 11, and a pair of guide holes 15 for inserting the guide pillars 13 are opened on the cross plate 11. A first spring 14 is sleeved on the guide pillars 13, and the two ends of the first spring 14 are respectively fixedly connected to the cross plate 11 and the pressure plate 12. Through the first spring 14, the pressure plate 12 can perform elastic movement under the cross plate 11, and the pressure plate 12 can be stably limited by the cooperation of the guide pillars 13 and the guide holes 15.

[0034] Furthermore, rollers 16 are respectively installed at the top ends of the first pillar 5 and the second pillar 6 to form rolling contact with the corresponding pressure plates 12. By providing the rollers 16, the wear between the top ends of the first pillar 5 and the second pillar 6 and the pressure plates 12 can be reduced when the frame vibrates.

[0035] The driving assembly includes a shell 17 fixed to the top of the base plate 1, a main shaft 19 and a main wheel 20 for driving the rear wheel 7 to rotate are rotatably connected in the shell 17, at least one protrusion is provided on the circumferential outer wall of the main wheel 20, a motor 18 is fixed to the side of the shell 17, the output shaft of the motor 18 is connected to the end of the main shaft 19, the same end of the main wheel 20 and the main shaft 19 are fixedly sleeved with a pulley 21, the two pulleys 21 are connected by a belt 22, and an axle seat 23 is fixed to the end of the top of the base plate 1 close to the front wheel 8, and the axle seat 23 is on the axle seat 23. The rotatable connection is provided with a secondary wheel 24 for driving the front wheel 8 to rotate. The secondary wheel 24 and the main shaft 19 are connected by a transmission assembly. The motor 18 is started, and the output shaft of the motor 18 drives the main shaft 19 to rotate. Then the main shaft 19 drives the main wheel 20 to rotate through the transmission cooperation between the pulley 21 and the belt 22. The main wheel 20 drives the rear wheel 7 to rotate. When the main wheel 20 rotates, the protrusion can cause the frame to vibrate. The main shaft 19 drives the secondary wheel 24 to rotate through the transmission assembly, and then the secondary wheel 24 can drive the front wheel 8 to rotate.

[0036] Among them, the transmission assembly includes a transmission shaft 26, which is installed on two mounting seats 25, and the mounting seats 25 are fixed on the top of the base plate 1. The adjacent ends of the transmission shaft 26 and the main shaft 19 are fixedly sleeved with mutually meshing bevel gears 27, and the adjacent ends of the transmission shaft 26 and the secondary wheel 24 are fixedly sleeved with mutually meshing bevel gears 28. When the main shaft 19 rotates, the transmission shaft 26 is driven to rotate through the meshing transmission of the two bevel gears 1 27, and then the transmission shaft 26 drives the secondary wheel 24 to rotate through the meshing transmission of the two bevel gears 28.

[0037] Furthermore, counterweights 29 of different specifications are hung on the support shaft 4, and both ends of the support shaft 4 are threadedly connected with screw sleeves 30 for tightening the counterweight 29. A T-shaped clamping rod 31 is fixed on the top of the base plate 1, and the top of the clamping rod 31 can be inserted into the U-shaped notch on the counterweight 29. The counterweights 29 of different specifications are hung on the support shaft 4, and then the screw sleeve 30 is tightened, and the clamping rod 31 is inserted into the U-shaped notch to prevent the counterweight 29 from deflecting around the support shaft 4. In this way, the counterweight 29 can replace the force exerted on the frame by a person stepping on the pedals when riding.

[0038] The front wheel 8 is fixed to the bottom end of the second pillar 6 by a plurality of bolts, so that the front wheel 8 can be detachably installed at the bottom end of the second pillar 6 .

[0039] Wherein, both ends of the rear wheel 7 are threadedly connected with nuts 32 for tightening the frame, so that the rear wheel 7 can be detachably installed at the rear wheel mounting hole of the frame.

[0040] Furthermore, a guide rail 33 capable of laterally moving is provided on the top of the base plate 1, and a slider 34 is slidably connected in the guide rail 33. A second spring 37 is fixed to one end of the slider 34, and the other end of the second spring 37 is fixed to the inner wall of the guide rail 33. A rack 35 is fixed to the top of the slider 34, and a gear cylinder 36 capable of meshing with the rack 35 is fixedly sleeved on the second pillar 6. A cam 40 capable of contacting the slider 34 is fixedly sleeved on the transmission shaft 26. The guide rail 33 is moved along the base plate 1 until the rack 35 and the gear cylinder 36 are meshed. In this way, when testing, the rotating transmission shaft 26 will synchronously drive the cam 40 to rotate, and then the cam 40 will periodically push the slider 34 inward, and then cooperate with the second spring 37 to push the slider 34 to reset and move, so that the slider 34 will synchronously drive the rack 35 to move back and forth, and the rack 35 will engage the gear cylinder 36 to drive the second pillar 6 to rotate back and forth, thereby simulating the rotation of the handlebar during riding, so that the experimental conditions for the frame are more in line with the actual riding state.

[0041] Among them, the guide rail 33 is slidably connected to the base plate 1, and an axle seat 2 38 is fixed on the top of the base plate 1. A screw 39 is rotatably connected to the axle seat 2 38. The screw 39 is threadedly connected to the guide rail 33. By rotating the screw 39, the guide rail 33 can be driven to move by the screw 39, thereby facilitating the engagement and separation between the rack 35 and the gear cylinder 36.

[0042] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An electric bicycle frame vibration test device, comprising a bottom plate, characterized in that: A pair of frame plates are fixed on the top of the bottom plate, an opening is opened on the top of the frame plate, a support shaft that can be placed in the opening is inserted in the footrest mounting hole of the frame, a first pillar is inserted in the seat cushion mounting hole of the frame, a second pillar is inserted in the faucet mounting hole of the frame, a front wheel is detachably mounted on the bottom end of the second pillar, a rear wheel is detachably mounted in the rear wheel mounting hole of the frame, two L-shaped brackets are fixed to the rear of the bottom plate, a downward electric push rod is fixed on the top of the bracket, a pressure plate is elastically connected to the output shaft of the electric push rod, the two pressure plates are respectively located above the first pillar and the second pillar, and a driving assembly is also arranged on the bottom plate; The driving assembly includes a shell fixed on the top of the bottom plate, a main shaft and a main wheel are rotatably connected in the shell, at least one protrusion is provided on the circumferential outer wall of the main wheel, a motor is fixed on the side of the shell, the motor output shaft is connected to the end of the main shaft, the same end of the main wheel and the main shaft are fixedly sleeved with a pulley, the two pulleys are connected by a belt, a shaft seat 1 is fixed at one end of the top of the bottom plate, a secondary wheel is rotatably connected to the shaft seat 1, and the secondary wheel and the main shaft are connected by a transmission assembly; The transmission assembly includes a transmission shaft, which is mounted on two mounting seats, and the mounting seats are fixed on the top of the bottom plate. The adjacent ends of the transmission shaft and the main shaft are fixedly sleeved with mutually meshing bevel gears 1, and the adjacent ends of the transmission shaft and the secondary wheel are fixedly sleeved with mutually meshing bevel gears 2; A guide rail capable of moving laterally is arranged on the top of the base plate, a slider is slidably connected in the guide rail, a second spring is fixed to one end of the slider, the other end of the second spring is fixed to the inner wall of the guide rail, a rack is fixed to the top of the slider, a gear cylinder capable of meshing with the rack is fixedly sleeved on the second pillar, and a cam is fixedly sleeved on the transmission shaft.

2. The electric bicycle frame vibration test device according to claim 1, characterized in that: A pair of guide posts are fixed on the top of the pressure plate, the output shaft of the electric push rod is connected to a horizontal plate, a pair of guide holes for inserting the guide posts are opened on the horizontal plate, a first spring is sleeved on the guide post, and both ends of the first spring are fixedly connected to the horizontal plate and the pressure plate respectively.

3. The electric bicycle frame vibration test device according to claim 1, characterized in that: The top ends of the first pillar and the second pillar are respectively provided with rollers which form rolling contact with the corresponding pressing plates.

4. The electric bicycle frame vibration test device according to claim 1, characterized in that: Counterweights of different specifications are hung on the support shaft, and both ends of the support shaft are threadedly connected with screw sleeves for tightening the counterweight. A T-shaped clamping rod is fixed on the top of the bottom plate, and the top end of the clamping rod can be inserted into the U-shaped notch on the counterweight.

5. The electric bicycle frame vibration test device according to claim 1, characterized in that: The front wheel is fixed to the bottom end of the second support column by a plurality of bolts.

6. The electric bicycle frame vibration test device according to claim 1, characterized in that: Both ends of the rear wheel are threadedly connected with nuts for tightening the frame.

7. The electric bicycle frame vibration test device according to claim 1, characterized in that: The guide rail is slidably connected to the bottom plate, a shaft seat 2 is fixed on the top of the bottom plate, a screw rod is rotatably connected to the shaft seat 2, and the screw rod is threadedly connected to the guide rail.

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