A durability testing device for electric bicycle tires

Abstract

The present invention belongs to the field of tire detection technology, and in particular, is a durability detection device for electric bicycle tires. In view of the problem that the large roller tester in the prior art is prone to throwing the tire away when performing a high-speed pressure test, which is dangerous, the following scheme is proposed, including a detection main platform, wherein an arc-shaped slot is reserved on the upper surface of the detection main platform near the front middle, and a support ring with an overall circular ring structure is clamped in the arc-shaped slot, and two mutually symmetrical support frames are fixed on the upper surface of the detection main platform at the rear side of the support ring, and the same main card seat is fixed between the tops of the two support frames, and a main bearing coinciding with the axis of the support ring is embedded in the middle of the main card seat. During the detection process, the present invention can make the tire body always roll against the circumferential inner wall of the support ring, which can not only simulate high-speed rotation but also increase the extrusion force on the tire body under the action of centrifugal force, and can detect multiple properties of the tire body at one time.

Description

Technical Field

[0001] The invention relates to the technical field of tire detection, and in particular to a durability detection device for electric bicycle tires. Background Art

[0002] Since electric bicycles are much heavier than ordinary bicycles, the tires they use are relatively large. Therefore, when producing electric bicycle tires, they need to be strictly tested. The quality of the tires is directly related to the safety performance of the electric bicycle. Durability tests on electric bicycle tires can verify the rationality and even safety of the tire structure and formula, provide test data for tire design, and shorten the tire R&D cycle.

[0003] After searching, it is found that in the prior art, when conducting durability tests on electric bicycle tires, the tires need to be mounted on a testing machine, and the simulated road surface is a large roller located directly below the tires. This detection method has certain risks during high-speed operation tests due to the effect of centrifugal force, and the tested tires are easily thrown out of the fixed workstation at high speed. Therefore, we propose a new type of durability testing device with high safety. Summary of the invention

[0004] In view of the technical problem that the large roller testing machine in the prior art is prone to causing the tire to fly away during high-speed pressure resistance testing, which is dangerous, the present invention adopts the following technical solution:

[0005] A tire durability testing device for an electric bicycle comprises a main testing platform, wherein an arc-shaped slot is reserved on the upper surface of the main testing platform near the front middle, and a support ring with an overall circular ring structure is clamped in the arc-shaped slot, and two mutually symmetrical support frames are fixed on the upper surface of the main testing platform at the rear side of the support ring, and a same main clamping seat is fixed between the top ends of the two support frames, a main bearing 1 which coincides with the axial center line of the support ring is embedded in the middle of the main clamping seat, and a transmission shaft is rotatably connected in the middle of the main bearing 1, and a rotating base is fixed to the front end of the transmission shaft, the rotating base is in an L-shaped structure as a whole, and two mutually parallel guide slide columns are reserved on the side of the vertical plate of the rotating base away from the main slide seat, and the same sliding extrusion column is slidably connected to the two guide slide columns, and the sliding The sliding direction of the extrusion column passes through the center of the support ring, and a laterally extending sleeve shaft is fixed to the end of the sliding extrusion column away from the rotating base, and a tire fixing steel ring is fixed to the end of the sleeve shaft, and the circumferential outer wall of the tire fixing steel ring is sleeved with the tire body; a sliding bearing is embedded in the middle of the horizontal plate of the rotating base, and a rack push rod is slidably connected in the sliding bearing; and a strong spring is fixed to the end of the rack push rod close to the sliding extrusion column, and a spring groove is opened at the end of the sliding extrusion column close to the strong spring, and a support plate is fixed to the bottom of the spring groove, and a pressure sensor is arranged between the support plate and the strong spring; a self-locking propulsion mechanism is arranged on the side of the rack push rod; it is used to press the rack push rod against one end of the sliding extrusion column, thereby increasing the pressure on the tire body.

[0006] Preferably, anti-twist sliding holes are opened on the front side of the main detection platform near the edges on both sides, and sliding extension rods are slidably inserted into the two anti-twist sliding holes, and a support foot is fixed at one end of the sliding extension rod close to the front side; during high-speed detection, the sliding extension rod can be pulled out in advance to increase the bearing area and improve the stability of the device.

[0007] Preferably, a motor base is fixed to the upper surface of the main detection platform near the rear side, and a main motor is fixed to the upper surface of the motor base, a driving pulley is fixed to the top end of the output shaft of the main motor; a driven pulley is fixed to the end of the transmission shaft away from the rotating base, and the same transmission belt is wound between the circumferential outer walls of the driving pulley and the driven pulley.

[0008] Preferably, the circumferential inner wall of the support ring is provided with uneven obstacle blocks to simulate a rough road surface.

[0009] Preferably, the bottom of the arc-shaped slot is provided with symmetrical anti-twist notches near both sides, and the circumferential outer wall of the support ring is provided with anti-twist protrusions that are compatible with the anti-twist notches; the anti-twist protrusions are provided to prevent the support ring from rotating due to high-speed rotation, and to ensure that the support ring is in a vertical state during installation, thereby improving the convenience of installation and replacement.

[0010] Preferably, a pin hole one is opened on the front side of the main card seat horizontally facing the rotating base, and a pin rod one is slidably inserted into the pin hole; two centrally symmetrical positioning slots are opened on the rear side of the vertical plate of the rotating base, and the position and size of the positioning slots are adapted to the pin rod one, a strip plate is fixed to the rear side of the pin rod one, and a tension spring is fixed between the strip plate and the main card seat; an arc-shaped card top plate is rotatably connected to the rear side of the main card seat near the pin rod.

[0011] Preferably, a mounting hole is opened near the rear side of the vertical plate of the rotating base, and a connecting block adapted to the mounting hole is fixed to the end of the transmission shaft; through the provided connecting block, axial movement of the detection position can be achieved to ensure that the tire body is located in the middle position of the support ring, thereby improving detection safety.

[0012] Preferably, an anti-slip guide groove matching the guide slide column is opened on the rear side of the sliding extrusion column near the top; and a stepped groove is provided on the circumferential outer wall of the sleeve shaft to ensure that the tire body is always in a vertical state during high-speed detection to prevent it from escaping from the sleeve shaft.

[0013] Preferably, the self-locking propulsion mechanism includes an axle rod bracket fixed to the side surface of the vertical plate of the rotating base, and a thick shaft extending horizontally forward is fixed on the front side of the axle rod bracket, and a propulsion gear and a worm wheel disk that are coaxial and fixed together are fixed at the end of the thick shaft, wherein the propulsion gear and the rack top rod are meshed with each other; an anti-twist groove is opened at the end of the horizontal plate of the rotating base, and an axle hole two that horizontally passes through the rotating base is opened at the bottom of the anti-twist groove; and a pin rod two is rotatably connected in the axle hole two, and a bearing seat and a spring baffle are respectively fixed at the front and rear ends of the pin rod two, a locking spring is fixed between the spring baffle and the rear side surface of the rotating base, an anti-slip bearing is clamped in the bearing seat, and a worm that meshes with the worm wheel disk is rotatably connected in the anti-slip bearing; the diameter of the worm wheel disk is larger than the diameter of the propulsion gear, so that it can be advanced step by step when pressure is applied to the tire body, thereby achieving a good self-locking effect.

[0014] Preferably, a plurality of support rods are fixed on the front side of the worm gear near the circumferential edge. When a single pressure test is performed, the same manual lever is clamped between two opposing support rods. At this time, the meshing worm can be deflected by an angle to separate the worm from the worm gear. After that, the manual lever is pressed down to perform pressure testing on the tire body.

[0015] The beneficial effects of the present invention are:

[0016] 1. By setting a detection method in which the whole tire rotates inside the support ring and cooperating with the support ring with an annular structure, the tire body can always roll against the inner circumference of the support ring during the detection process, which can not only simulate high-speed rotation but also increase the squeezing force on the tire body under the action of centrifugal force, and can detect multiple properties of the tire body at one time.

[0017] 2. By using the transmission belt as the power transmission, it can be prevented that the continuous rotation of the rotating base due to inertia when stopping affects the main motor, that is, the main motor can be protected from reverse rotation by the one-way transmission belt.

[0018] 3. By setting the arc-shaped card top plate, during normal rotation, the pin rod 1 and the strip plate can be pulled backwards first, and then the arc-shaped card top plate can be rotated to fix the pin rod 1 withdrawn from the positioning slot, thereby playing the role of assisting the switching of the positioning of the rotating base. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention when performing a withstand voltage test;

[0020] Figure 2 It is a schematic diagram of the rear structure of the present invention when performing a withstand voltage test;

[0021] Figure 3 It is a schematic diagram of the structure of the present invention when performing a wear test;

[0022] Figure 4 It is a schematic diagram of the rear side structure of the present invention when performing a wear test;

[0023] Figure 5 It is a front view of the present invention when performing a wear test;

[0024] Figure 6 For the present invention Figure 5 Schematic diagram of the cross-sectional structure along line AA;

[0025] Figure 7 It is a schematic diagram of the assembly structure of the support ring in the present invention;

[0026] Figure 8 It is a schematic diagram of the exploded structure of the rotating base in the present invention.

[0027] In the figure: 1, main detection platform; 101, arc-shaped slot; 102, anti-twist sliding hole; 103, anti-twist notch; 2, sliding extension rod; 3, support foot; 4, guide slide column; 5, sliding extrusion column; 501, support plate; 502, anti-slip guide slide groove; 6, sleeve shaft; 7, tire body; 8, main motor; 9, support frame; 10, pin rod 1; 11, transmission shaft; 12, support ring; 1201, anti-twist bump; 13, shaft rod bracket; 14, spring baffle; 15, rotary Rotating base; 1501, anti-twist notch; 16, rack top rod; 17, bearing seat; 18, support rod; 19, worm wheel; 20, manual tilting lever; 21, main clamping seat; 22, main bearing one; 23, driven pulley; 24, arc clamping plate; 25, tension spring; 26, driving pulley; 27, motor seat; 28, tightening spring; 29, transmission belt; 30, strong spring; 31, worm; 32, propulsion gear; 33, connecting block; 34, pin rod two. DETAILED DESCRIPTION

[0028] 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.

[0029] In this embodiment, refer to Figure 1-8A tire durability testing device for an electric bicycle comprises a testing main platform 1, an arc-shaped card slot 101 is reserved near the front middle of the upper surface of the testing main platform 1, and a support ring 12 with an overall circular ring structure is clamped in the arc-shaped card slot 101, two mutually symmetrical support frames 9 are fixed on the upper surface of the testing main platform 1 at the rear side of the support ring 12, and a main card seat 21 is fixed between the tops of the two support frames 9, a main bearing 22 coinciding with the axis of the support ring 12 is embedded in the middle of the main card seat 21, and the main bearing 22 is arranged on the upper surface of the testing main platform 1. The middle of the bearing 22 is rotatably connected with the transmission shaft 11, and the front end of the transmission shaft 11 is fixed with a rotating base 15, and the rotating base 15 is in an L-shaped structure as a whole; that is, the "L" is rotated 180 degrees, and two parallel guide slides 4 are reserved on the side of the vertical plate of the rotating base 15 away from the main card seat 21, and the two guide slides 4 are slidably connected with the same sliding extrusion column 5, and the sliding direction of the sliding extrusion column 5 passes through the center of the support ring 12, and the end of the sliding extrusion column 5 away from the rotating base 15 is fixed with A sleeve shaft rod 6 extends transversely, and a tire fixing steel ring is fixed at the end of the sleeve shaft rod 6, and a tire body 7 is sleeved on the circumferential outer wall of the tire fixing steel ring; a sliding bearing is embedded in the middle of the horizontal plate of the rotating base 15, and a rack push rod 16 is slidably connected in the sliding bearing; and a strong spring 30 is fixed to the end of the rack push rod 16 close to the sliding extrusion column 5, and a spring groove is opened at the end of the sliding extrusion column 5 close to the strong spring 30, and a support plate 501 is fixed to the bottom of the spring groove, and the support plate 501 and the strong spring 3 0; a self-locking propulsion mechanism is arranged on the side of the rack push rod 16; it is used to press the rack push rod 16 against one end of the sliding extrusion column 5, thereby increasing the pressure on the tire body 7. In combination with the annular support ring 12, the tire body 7 can always roll against the circumferential inner wall of the support ring 12 during the detection process, which can not only simulate high-speed rotation but also increase the extrusion pressure on the tire body 7 under the action of centrifugal force, so that multiple properties of the tire body 7 can be detected at one time.

[0030] In the present invention, anti-twist sliding holes 102 are opened on the front side of the detection main platform 1 near the edges on both sides, and sliding extension rods 2 are slidably inserted in the two anti-twist sliding holes 102, and the sliding extension rods 2 are fixed with support feet 3 at one end near the front side; during high-speed detection, the sliding extension rods 2 can be pulled out in advance to increase the bearing area and improve the stability of the device.

[0031] Reference Figure 3-4A motor base 27 is fixed to the upper surface of the detection main platform 1 near the rear side, and a main motor 8 is fixed to the upper surface of the motor base 27, and a driving pulley 26 is fixed to the top of the output shaft of the main motor 8; a driven pulley 23 is fixed to the end of the transmission shaft 11 away from the rotating base 15, and the same transmission belt 29 is wound between the circumferential outer walls of the driving pulley 26 and the driven pulley 23; by setting up the transmission belt 29 as the power transmission, it can be prevented that the continuous rotation of the rotating base 15 due to inertia when stopping affects the main motor 8, that is, the main motor 8 can be protected from reverse rotation by the one-way transmission belt 29.

[0032] In the present invention, the inner circumferential wall of the support ring 12 is provided with uneven obstacle blocks to simulate a rough road surface.

[0033] Reference Figure 3 and Figure 7 The bottom of the arc-shaped slot 101 is provided with symmetrical anti-twist notches 103 near both sides, and the circumferential outer wall of the support ring 12 is provided with anti-twist protrusions 1201 that are compatible with the anti-twist notches 103; the anti-twist protrusions 1201 are set to prevent the support ring 12 from rotating due to high-speed rotation, and the support ring 12 can be ensured to be in a vertical state during installation, thereby improving the convenience of installation and replacement.

[0034] Reference Figure 4-Figure 5 A pin hole 1 is horizontally opened on the front of the main card seat 21 and faces the rotating base 15, and a pin rod 10 is slidably inserted in the pin hole; two centrally symmetrical positioning slots are opened on the rear side of the vertical plate of the rotating base 15, and the position and size of the positioning slots are adapted to the pin rod 10, a strip plate is fixed to the rear side of the pin rod 10, and a tension spring 25 is fixed between the strip plate and the main card seat 21; an arc-shaped card top plate 24 is rotatably connected to the rear side of the main card seat 21 near the pin rod 10; by setting the arc-shaped card top plate 24, during normal rotation, the pin rod 10 and the strip plate can be pulled backwards first, and then the arc-shaped card top plate 24 can be rotated to fix the pin rod 10 withdrawn from the positioning slot, thereby playing a role in assisting the switching of the positioning of the rotating base 15.

[0035] Reference Figure 8 A mounting hole is opened near the rear side of the vertical plate of the rotating base 15, and a connecting block 33 adapted to the mounting hole is fixed to the end of the transmission shaft 11; through the setting of the connecting block 33, the axial movement of the detection position can be achieved to ensure that the tire body 7 is located in the middle position of the support ring 12, thereby improving the safety of the detection.

[0036] Reference Figure 8An anti-slip guide groove 502 is provided on the rear side of the sliding extrusion column 5 near the top end, which is compatible with the guide slide column 4; and a stepped groove is provided on the circumferential outer wall of the sleeve shaft 6 to ensure that the tire body 7 is always in a vertical state during high-speed detection to prevent it from escaping from the sleeve shaft 6.

[0037] Reference Figure 4 , Figure 6 and Figure 8 The self-locking propulsion mechanism includes an axle holder 13 fixed to the side of the vertical plate of the rotating base 15, and a thick shaft extending horizontally forward is fixed to the front of the axle holder 13, and a propulsion gear 32 and a worm wheel 19 are fixed to the end of the thick shaft, which are coaxial and fixed together, wherein the propulsion gear 32 and the rack top rod 16 are meshed with each other; an anti-twist notch 1501 is formed at the end of the horizontal plate of the rotating base 15, and an axle hole 2 is formed at the bottom of the anti-twist notch 1501 and horizontally penetrates the rotating base 15; and in the axle hole 2 A pin rod 2 34 is rotatably connected, and a bearing seat 17 and a spring baffle 14 are fixed to the front and rear ends of the pin rod 2 34 respectively. A tightening spring 28 is fixed between the spring baffle 14 and the rear side of the rotating base 15. An anti-slip bearing is clamped in the bearing seat 17, and a worm 31 meshing with the worm wheel 19 is rotatably connected in the anti-slip bearing; the diameter of the worm wheel 19 is larger than the diameter of the propulsion gear 32, so that the tire body 7 can be pushed forward step by step when pressure is applied to the tire body 7, thereby achieving a good self-locking effect.

[0038] Reference Figure 1-Figure 2 A plurality of supporting rods 18 are fixed on the front side of the worm wheel 19 near the circumferential edge. When a single pressure test is performed, the same manual lever 20 is clamped between two opposing supporting rods 18. At this time, the meshing worm 31 can be deflected by an angle to separate the worm 31 from the worm wheel 19. Then, the manual lever 20 is pressed down to perform pressure testing on the tire body 7.

[0039] Before using the device, the tire body 7 to be tested is first sleeved on the steel ring, and then the steel ring is fixed on the sleeve shaft 6; when a pressure test is required, the arc-shaped card top plate 24 clamped on the strip plate is first rotated to a position away from the strip plate, at which time the pin rod 10 is inserted into the positioning slot on the back of the rotating base 15 under the action of the tension spring 25 to prevent the rotating base 15 and the tire body 7 from shaking, and then the bearing seat 17 is pulled back and forth to disengage the bearing seat 17 from the anti-twist notch 1501, and then the worm 31 is rotated as a whole to deflect the worm 31 by an angle so that the worm 31 is separated from the worm wheel 19, and then the manual tilting rod 20 is pressed down to perform pressure testing on the tire body 7; after the test, the meshing is restored and the locking of the pin rod 10 is removed; at this time, according to the pressure requirements, the self-locking propulsion mechanism is adjusted to apply constant pressure to the tire body 7, and finally the main motor 8 is started to perform the wear test.

[0040] 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 tire durability testing device, comprising a testing main platform (1), wherein an arc-shaped slot (101) is reserved near the front middle of the upper surface of the testing main platform (1), characterized in that: A support ring (12) having an overall circular ring structure is clamped in the arc-shaped clamping groove (101); two mutually symmetrical support frames (9) are fixed on the upper surface of the detection main platform (1) at the rear side of the support ring (12); and a main clamping seat (21) is fixed between the top ends of the two support frames (9); a main bearing (22) coinciding with the axis of the support ring (12) is embedded in the middle of the main clamping seat (21); and a transmission shaft (11) is rotatably connected in the middle of the main bearing (22); a rotating base (15) is fixed at the front end of the transmission shaft (11); the rotating base (15) has an overall L-shaped structure; and two mutually parallel guide slide columns (4) are reserved on a side of a vertical plate of the rotating base (15) away from the main slide column (21); the two guide slide columns (4) are slidably connected to a same sliding extrusion column (5); and the sliding extrusion column (5) is slidably connected to the two guide slide columns (4). The sliding direction of (5) passes through the center of the support ring (12); a laterally extending sleeve shaft (6) is fixed to one end of the sliding extrusion column (5) away from the rotating base (15); a tire fixing steel ring is fixed to the end of the sleeve shaft (6); a tire body (7) is sleeved on the circumferential outer wall of the tire fixing steel ring; a sliding bearing is embedded in the middle of the horizontal plate of the rotating base (15), and a rack push rod (16) is slidably connected in the sliding bearing; and a strong spring (30) is fixed to one end of the rack push rod (16) close to the sliding extrusion column (5); a spring slot is provided at one end of the sliding extrusion column (5) close to the strong spring (30), and a support plate (501) is fixed to the bottom of the spring slot, and a pressure sensor is provided between the support plate (501) and the strong spring (30); a self-locking propulsion mechanism is provided on the side of the rack push rod (16); The front side of the main card seat (21) is provided with a pin hole one which is horizontally oriented toward the rotating base (15), and a pin rod one (10) is slidably inserted into the pin hole one; the rear side of the vertical plate of the rotating base (15) is provided with two centrally symmetrical positioning slots, the positions and sizes of which are adapted to the pin rod one (10); a strip plate is fixed to the rear side of the pin rod one (10), and a tension spring (25) is fixed between the strip plate and the main card seat (21); the rear side of the main card seat (21) is rotatably connected to an arc-shaped card top plate (24) near the pin rod one (10).

2. The electric bicycle tire durability detection device according to claim 1, characterized in that: The front side of the main detection platform (1) is provided with anti-twist sliding holes (102) near the edges on both sides, and sliding extension rods (2) are slidably inserted into the two anti-twist sliding holes (102), and a support foot (3) is fixed to one end of the sliding extension rod (2) near the front side.

3. The electric bicycle tire durability detection device according to claim 1, characterized in that: A motor seat (27) is fixed to the upper surface of the main detection platform (1) near the rear side, and a main motor (8) is fixed to the upper surface of the motor seat (27), and a driving pulley (26) is fixed to the top end of the output shaft of the main motor (8); a driven pulley (23) is fixed to the end of the transmission shaft (11) away from the rotating base (15), and a common transmission belt (29) is wound between the circumferential outer walls of the driving pulley (26) and the driven pulley (23).

4. The electric bicycle tire durability detection device according to claim 1, characterized in that: The circumferential inner wall of the support ring (12) is provided with uneven obstacle blocks to simulate a rough road surface.

5. The electric bicycle tire durability detection device according to claim 1, characterized in that: The bottom of the arc-shaped slot (101) is provided with symmetrical anti-twist notches (103) near both sides, and the circumferential outer wall of the support ring (12) is provided with anti-twist convex blocks (1201) adapted to the anti-twist notches (103).

6. The electric bicycle tire durability detection device according to claim 1, characterized in that: A mounting hole is formed on the vertical plate of the rotating base (15) near the rear side, and a connecting block (33) adapted to the mounting hole is fixed to the end of the transmission shaft (11).

7. The electric bicycle tire durability detection device according to claim 1, characterized in that: An anti-dropping guide groove (502) matching the guide slide column (4) is provided on the rear side of the sliding extrusion column (5) near the top end; and a stepped groove is provided on the circumferential outer wall of the sleeve shaft (6).

8. The electric bicycle tire durability detection device according to claim 1, characterized in that: The self-locking propulsion mechanism comprises a shaft rod holder (13) fixed to a vertical plate of a rotating base (15) near a side surface, and a thick shaft extending horizontally forward is fixed to the front of the shaft rod holder (13), and a propulsion gear (32) and a worm wheel (19) are fixed to the end of the thick shaft, which are coaxial and fixed together, wherein the propulsion gear (32) and the rack top rod (16) are meshed with each other; an anti-twist notch (1501) is formed at the end of the horizontal plate of the rotating base (15), and a horizontally extending notch (1501) is formed at the bottom of the anti-twist notch (1501) A second shaft hole of the rotating base (15); a second pin rod (34) is rotatably connected in the second shaft hole; a bearing seat (17) and a spring baffle (14) are respectively fixed to the front and rear ends of the second pin rod (34); a pressing spring (28) is fixed between the spring baffle (14) and the rear side surface of the rotating base (15); an anti-slip bearing is clamped in the bearing seat (17); and a worm (31) meshing with the worm wheel (19) is rotatably connected in the anti-slip bearing; the diameter of the worm wheel (19) is larger than the diameter of the propulsion gear (32).

9. The electric bicycle tire durability detection device according to claim 8, characterized in that: A plurality of support rods (18) are fixed to the front side of the worm wheel (19) near the circumferential edge. When a single pressure test is performed, a same manual tilting rod (20) is clamped between two opposing support rods (18).

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