Electric bicycle frame strength testing device

Abstract

The invention relates to the technical field of frame strength testing, in particular to an electric bicycle frame strength testing device which comprises two sets of driving teeth, the upper ends of one set of driving teeth are fixedly connected with a driving source through a rotating shaft, the surfaces of the driving teeth are in meshed connection with matching teeth, and the lower ends of the matching teeth are fixedly connected with a rotating cylinder. A plurality of sets of force application grooves are formed in the inner wall of the rotating cylinder at equal intervals, a lifting cylinder is arranged in the force application grooves, two sets of symmetrically-arranged vertical rods are elastically inserted into the lifting cylinder, the lower ends of the vertical rods are rotationally connected with detachable contact pieces, and two sets of telescopic heads are symmetrically inserted into the lifting cylinder; and a magnetic suction rod is inserted into the telescopic head. According to the invention, through cooperative use of all parts, multi-directional force application detection can be carried out on the electric bicycle frame, a bumping phenomenon can be simulated in a force application detection process, all-directional detection is realized, the accuracy of a detection result is ensured, and the detection efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of frame strength testing, in particular to a kind of electric bicycle frame strength testing device. BACKGROUND

[0002] Electric bicycle frame is the core skeleton of the whole vehicle, usually made of metal (such as aluminum alloy, steel) or composite material. It is responsible for supporting all key components (battery, motor, wheels, handlebars, etc.), and evenly dispersing the force generated during riding (such as acceleration, braking, jolt) to the entire structure, ensuring vehicle stability and riding safety. But before the production of electric bicycle frame is completed and put into use, its strength needs to be detected to ensure that the frame strength meets the production requirements.

[0003] But the traditional electric bicycle frame strength testing device usually adopts one-way loading method, such as only simulating vertical static pressure through hydraulic cylinder, or simulating lateral impact through lateral push-pull mechanism, which cannot reproduce the multi-directional stress coupling state of electric bicycle frame in actual use due to jolt, sudden braking, turning and other actions, resulting in deviation between test results and real working conditions, and further affecting the detection results of electric bicycle frame strength. SUMMARY

[0004] The purpose of the present application is to provide an electric bicycle frame strength testing device to solve the problem of the traditional detection method in the prior art that cannot effectively detect the strength of electric bicycle frame.

[0005] To achieve the above purpose, the present application provides the following technical scheme: an electric bicycle frame strength testing device, comprising a base, and a cavity is formed in the inside of the base, a fixing module is arranged above the base, a gantry is fixedly installed on the surface of the base, and the gantry is located directly above the fixing module, further comprising: Two groups of force applying components for applying pressure to the frame in multiple directions, both groups of the force applying components include two groups of drive teeth, the upper end of one group of the drive teeth is fixedly connected with a drive source through a rotating shaft, and the two groups of drive teeth are connected through a connecting piece, the surface of the drive tooth is meshingly connected with a matching tooth, the lower end of the matching tooth is fixedly connected with a rotating cylinder, a plurality of force applying grooves are equidistantly formed in the inner wall of the rotating cylinder, a lifting cylinder is arranged in the inside of the force applying groove, two groups of circular grooves are symmetrically formed in the inside of the lifting cylinder, two groups of vertically arranged vertical rods are elastically inserted into the inside of the lifting cylinder, a detachable contact piece is rotatably connected to the lower end of the vertical rod, two groups of telescopic heads are symmetrically inserted into the inside of the lifting cylinder, and the telescopic head is slidingly matched with the force applying groove, a magnetic attraction rod is inserted into the inside of the telescopic head, and the magnetic attraction rod is electrically connected with a touch button.

[0006] Further, the lower surface of the fixed module is symmetrically provided with two groups of transmission rods, and the transmission rods are arranged in the cavities formed in the base.

[0007] Further, the force applying groove is composed of a plurality of groups of semicircular grooves and arc grooves, and each two groups of semicircular grooves are connected smoothly by two groups of arc grooves, and the two groups of arc grooves are opposite in direction.

[0008] Further, the top surface of the lifting cylinder is elastically connected to the inner top surface of the rotating cylinder through a connecting spring, the inner wall of the lifting cylinder is symmetrically provided with two groups of limiting grooves, the inner wall of the limiting groove is slidably connected to a limiting rod through a limiting block, the upper end of the limiting rod penetrates the inner part of the rotating cylinder and is fixedly connected to the gantry, and the limiting rod is rotatably connected to the rotating cylinder.

[0009] Further, one end of the telescopic head is a spherical structure, and the telescopic head is slidably connected to the inner wall of the force applying groove.

[0010] Further, the touch button is arranged directly above the vertical rod and is fixedly arranged in the inner wall of the circular groove formed in the lifting cylinder.

[0011] Further, the connecting member comprises a first transmission wheel and a second transmission wheel, the first transmission wheel is sleeved on the surface of the rotating shaft, the second transmission wheel is rotatably arranged in the inner part of the gantry, and the second transmission wheel is fixedly connected to the other group of driving teeth through a rotating rod, the first transmission wheel and the second transmission wheel are transmissionally connected through a transmission rope, two groups of guide wheels are frictionally and rollingly connected to the surface of the transmission rope, and the two groups of guide wheels are rotatably connected to the inner wall of the gantry.

[0012] Further, the vibration assembly for driving the fixed module to vibrate up and down comprises a horizontal plate arranged in the cavity, and the upper surface of the horizontal plate is fixedly connected to the lower end of the transmission rod, a curved rod is arranged below the horizontal plate, and a belt pulley set is fixedly connected to one end of the curved rod.

[0013] Further, one end of the belt pulley set is arranged in the inner part of the base, and the other end of the belt pulley set is sleeved on the surface of the rotating rod.

[0014] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects: Firstly, the driving teeth, the lifting cylinder, the touch button and the connecting member are cooperated with each other, so that the force can be applied to the vertical direction of the frame and one side of the frame at the same time when the strength of the frame is detected, the multi-angle detection of the frame is realized, the real force scene is simulated, the detection efficiency of the frame is improved, and the accuracy of the detection result is ensured.

[0015] Secondly, the present application sets the horizontal plate, the curved rod and the belt pulley group and other matched parts, and then applies force to the vertical direction and one side of the frame, and drives the curved rod to rotate and contact with the horizontal plate through the transmission of the belt pulley group, so that the horizontal plate moves up and compresses the transmission rod, so that the horizontal plate can vibrate the fixed module, that is, the frame, so as to detect the fatigue characteristics of the frame and realize the purpose of all-around detection. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0017] Figure 1 The overall structure of the present application is shown in the figure; Figure 2 The internal structure of the gantry of the present application is shown in the figure; Figure 3 The overall structure of the force applying assembly of the present application is shown in the figure; Figure 4 The internal structure of the rotating cylinder of the present application is shown in the figure; Figure 5 The cross-sectional structure of the figure is shown in the figure; Figure 4 Figure 6 The plane structure of the force applying groove of the present application is shown in the figure; Figure 7 The structure of the limiting rod and the lifting cylinder of the present application is shown in the figure; Figure 8 The structure of the figure is shown in the figure; Figure 5 Figure 9 The structure of the telescopic head and the lifting cylinder of the present application is shown in the figure; Figure 10 The overall structure of the vibration assembly of the present application is shown in the figure.

[0018] ​​In the diagram: 1. Base; 2. Fixing module; 201. Transmission rod; 3. Gantry frame; 4. Force application component; 41. Connector; 4101. First transmission wheel; 4102. Second transmission wheel; 4103. Transmission rope; 4104. Guide wheel; 401. Drive gear; 402. Mating gear; 403. Rotating cylinder; 404. Force application groove; 405. Lifting cylinder; 4051. Connecting spring; 4052. Limiting groove; 4053. Limiting rod; 406. Vertical rod; 407. Contact element; 408. Telescopic head; 409. Magnetic suction rod; 410. Touch button; 5. Vibration component; 501. Horizontal plate; 502. Curved rod; 503. Pulley assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0020] The present invention will be further described below with reference to embodiments.

[0021] Example: An electric bicycle frame strength testing device, such as... Figures 1-10 As shown, the device includes a base 1 with an internal cavity for support. A fixing module 2 is located above the base 1. This fixing module 2 is a prior art technology that can fix the electric bicycle frame to be tested for strength, ensuring that the frame does not shift during the strength test. The fixing method can be clamping. A gantry frame 3 is fixedly mounted on the surface of the base 1, and the gantry frame 3 is located directly above the fixing module 2. The gantry frame 3 and the fixing module 2 are fixedly connected. Two sets of transmission rods 201 are symmetrically installed on the lower surface of the fixed module 2, and the transmission rods 201 are located in the cavity opened inside the base 1. By setting the transmission rods 201, the kinetic energy can be transmitted. It is worth noting that the transmission rods 201 are divided into two parts, namely an outer cylinder and an inner cylinder. The inner cylinder is inserted into the outer cylinder, and the upper end of the inner cylinder is fixedly connected to the lower surface of the fixed module 2. The outer cylinder can move upward under the action of external force, so that the outer cylinder and the inner cylinder can collide and generate vibration.

[0022] Combined with appendix Figure 1 -Appendix Figure 10It also includes two groups of force applying assemblies 4 for applying pressure to the frame in multiple directions, so that the frame can be detected in multiple directions during the strength detection process, improving the detection efficiency of the frame and ensuring the accuracy of the detection results; the two groups of force applying assemblies 4 each include two groups of driving teeth 401, and the upper end of one group of driving teeth 401 is fixedly connected with a driving source through a rotating shaft, which can rotate under the action of the driving source by setting the driving teeth 401 and the driving source; it is worth noting that, in combination with the accompanying Figure 2 and the accompanying Figure 3 , the two groups of driving teeth 401 are respectively vertically installed on the lower surface of the gantry 3 and one side of the gantry 3, and are vertically installed; the two groups of driving teeth 401 are connected through a connecting piece 41, and the two groups of driving teeth 401 can be drivingly connected to achieve the purpose of synchronous rotation by setting the driving teeth 401; The surface of the driving tooth 401 is engagedly connected with a matching tooth 402, which can rotate synchronously under the rotation of the driving tooth 401 by setting the matching tooth 402; the lower end of the matching tooth 402 is fixedly connected with a rotating cylinder 403, which can rotate synchronously with the matching tooth 402 by setting the rotating cylinder 403; a plurality of force applying grooves 404 are equidistantly formed on the inner wall of the rotating cylinder 403, the force applying grooves 404 are composed of a plurality of equidistantly distributed semi-circular grooves and arc grooves, and each two groups of semi-circular grooves are smoothly connected through two groups of arc grooves, and the directions of the two groups of arc grooves are opposite; by setting the force applying grooves 404, the force applying grooves 404 can play a guiding and limiting role, and can also drive other parts to move downward, change the force applied to the electric bicycle frame, and ensure that the force at each stage can be maintained for a period of time, improving the accuracy of detection.

[0023] The inner part of the force applying groove 404 is provided with a lifting cylinder 405, and two groups of circular grooves are symmetrically formed in the inner part of the lifting cylinder 405; the lifting cylinder 405 can be lifted in the inner part of the rotating cylinder 403 by setting the lifting cylinder 405; it is worth noting that a position sensor is arranged above the lifting cylinder 405, which is fixedly installed on the inner top surface of the rotating cylinder 403 and used for detecting the position of the lifting cylinder 405; the top surface of the lifting cylinder 405 is elastically connected with the inner top surface of the rotating cylinder 403 through a connecting spring 4051, which can be stretched when the lifting cylinder 405 moves downward, so that the connecting spring 4051 generates a counterforce to facilitate the subsequent driving of the lifting cylinder 405 to reset; The inner wall of the lifting cylinder 405 is symmetrically provided with two groups of limiting grooves 4052, which can play a guiding and limiting role. The inner wall of the limiting groove 4052 is slidably connected with a limiting rod 4053 through a limiting block. The upper end of the limiting rod 4053 penetrates the inside of the rotating cylinder 403 and is fixedly connected with the gantry 3, and the limiting rod 4053 is rotatably connected with the rotating cylinder 403. By arranging the limiting rod 4053, the lifting cylinder 405 can be limited in cooperation with the lifting cylinder 405, so that the lifting cylinder 405 will not rotate when it is lowered. At the same time, the limiting rod 4053 is rotatably connected with the rotating cylinder 403, so that the rotating cylinder 403 can also be limited, so that the rotating cylinder 403 can rotate.

[0024] The inside of the lifting cylinder 405 is elastically inserted with two groups of vertically arranged vertical rods 406. By arranging the vertical rod 406, when the lower end is stressed, it will move to the inside of the lifting cylinder 405, and when it is not stressed, it can automatically return to the original position. The lower end of the vertical rod 406 is rotatably connected with a detachable contact piece 407. The lower end of the contact piece 407 is in contact with the surface of the electric bicycle frame, which is used for point force on the electric bicycle frame. It is worth noting that the contact piece 407 can be disassembled and replaced as needed, and the other end of the vertical rod 406 is fixedly installed with a strip-shaped plate for exerting force on the side of the electric bicycle frame to realize multi-directional side view. At the same time, the inside of the contact piece 407 and the strip-shaped plate fixedly installed at the end of the two groups of vertical rods 406 are integrated with a pressure sensor, and the pressure sensor is electrically connected with an external display device of the prior art, which is not shown in the figure, so as to record the measurement data in time; The inside of the lifting cylinder 405 is symmetrically inserted with two groups of telescopic heads 408, and the telescopic head 408 is slidably connected with the force applying groove 404. By arranging the telescopic head 408, the telescopic head 408 can be connected with the force applying groove 404, so that when the rotating cylinder 403 rotates, the lifting cylinder 405 can be driven to move downward and stretch the connecting spring 4051. It is worth noting that the telescopic head 408 is elastically connected with the lifting cylinder 405 through a return spring, and the inside of the telescopic head 408 is inserted with a magnetic attraction rod 409. One end of the magnetic attraction rod 409 inserted in the telescopic head 408 is a magnetic structure, so as to control the extension and contraction of the telescopic head 408. That is, when one end of the magnetic attraction rod 409 does not produce magnetism, the telescopic head 408 extends under the action of the return spring and is slidably connected with the force applying groove 404. Conversely, when magnetism is generated, an attractive force is generated to suck and compress the return spring, so that the telescopic head 408 is separated from the force applying groove 404; The magnetic attraction rod 409 is electrically connected with the touch button 410. The touch button 410 is arranged directly above the vertical rod 406 and is fixedly installed on the inner wall of the circular groove of the lifting cylinder 405. The touch button 410 is electrically connected with the position sensor and the external power supply. The position sensor and the external power supply are prior art and are not shown in the figure. By arranging the touch button 410, whether the one end of the magnetic attraction rod 409 is powered and generates magnetism can be controlled. That is, when the touch button 410 is pressed, the one end of the magnetic attraction rod 409 does not generate magnetism. At this time, the telescopic head 408 is in sliding fit with the force applying groove 404. Conversely, after being pressed and reset, the one end of the magnetic attraction rod 409 is powered to generate magnetism, so that the telescopic head 408 is attracted and separated from the force applying groove 404. At this time, the stretched connecting spring 4051 drives the lifting cylinder 405 and other components to reset. After the resetting is completed, the electric signal sent by the position sensor controls the one end of the magnetic attraction rod 409 to be powered off, so that the telescopic head 408 can be stretched out and in sliding fit with the inner wall of the force applying groove 404 again.

[0025] In combination with the accompanying drawings Figure 1 - the accompanying drawings Figure 3 The connecting piece 41 comprises a first transmission wheel 4101 and a second transmission wheel 4102. The first transmission wheel 4101 is sleeved on the surface of the rotating shaft. The second transmission wheel 4102 is rotatably installed in the interior of the portal frame 3. The second transmission wheel 4102 is fixedly connected with the other group of driving teeth 401 through a rotating rod. The first transmission wheel 4101 and the second transmission wheel 4102 are drivingly connected through a transmission rope 4103. By arranging the first transmission wheel 4101, the second transmission wheel 4102 and the transmission rope 4103, the rotating direction of the driving source can be changed, so that the two groups of driving teeth 401 can be synchronously driven to rotate. The two groups of matching teeth 402 can be synchronously driven to rotate. Two groups of guide wheels 4104 are frictionally and rollingly connected on the surface of the transmission rope 4103. The two groups of guide wheels 4104 are rotatably connected with the inner wall of the portal frame 3. By arranging the guide wheels 4104, the transmission rope 4103 can be limited in position, and the normal work of the transmission rope 4103 can be ensured.

[0026] In combination with the accompanying drawings Figure 1 - the accompanying drawings Figure 10Further comprising a vibration assembly 5 for driving the fixed module 2 to generate up-down vibration, so that the frame of the electric bicycle can also generate vibration when the strength detection is carried out, can simulate the bumps generated in the riding process, improve the authenticity of the simulation environment, detect the fatigue characteristics of the frame, and achieve the purpose of omnibearing detection; It is worth noting that when detecting the fatigue characteristics of the electric bicycle frame, a sensor array is arranged in the high stress area (such as the head tube, five-way, rear upper fork, rear lower fork connection, and welding point) of the electric bicycle frame to be tested for capturing vibration in different directions; and the sensor is externally connected to a display for real-time recording of the changes in the frame; The vibration assembly 5 comprises a horizontal plate 501 arranged inside the cavity, and the upper surface of the horizontal plate 501 is fixedly connected with the lower end of the transmission rod 201; By arranging the horizontal plate 501, vibration can be generated by its up-down action, and transmitted to the fixed module 2 through the transmission rod 201; It is worth noting that the horizontal plate 501 is slidingly connected with the inner wall of the cavity, which ensures that the horizontal plate 501 can move up and down normally and generate vibration through the transmission rod 201 acting on the fixed module 2; A curved rod 502 is arranged below the horizontal plate 501, and the curved rod 502 is rotatably connected with the inner wall of the cavity; By arranging the curved rod 502 below the middle of the horizontal plate 501, the curved rod 502 can drive the horizontal plate 501 to move up and down by rotating, and compress the transmission rod 201, so that the transmission rod 201 generates vibration and acts on the fixed module 2; It is worth noting that the surface of the curved rod 502 is sleeved with a rotating cylinder, which is a prior art and not shown in the figure, for reducing the friction between the curved rod 502 and the horizontal plate 501; Wherein, one end of the curved rod 502 is fixedly connected with a belt pulley set 503, one end of the belt pulley set 503 is arranged in the inside of the base 1, and the other end of the belt pulley set 503 is sleeved on the surface of the rotating rod; By arranging the belt pulley set 503, it can rotate synchronously with the rotating rod, thereby driving the curved rod 502 to rotate synchronously and be in extrusion contact with the horizontal plate 501, so that the horizontal plate 501 can move up and down.

[0027] Specifically, when the strength of the electric bicycle frame is detected, the electric bicycle frame is first placed on the surface of the fixed module 2 and fixed, then the driving source is started, so that the driving teeth 401 fixedly connected with the driving source start to rotate, at the same time, through the cooperation of the first transmission wheel 4101, the second transmission wheel 4102 and the transmission rope 4103, the other group of driving teeth 401 starts to rotate synchronously, and drives the two groups of matching teeth 402 to rotate synchronously, the rotating matching teeth 402 drives the rotating cylinder 403 to rotate synchronously, and under the cooperation between the force applying groove 404 and the telescopic head 408, the lifting cylinder 405 starts to descend, thereby driving the vertical rod 406 and the contact piece 407 to descend synchronously, and starting to contact the upper part of the electric bicycle frame, and making the vertical rod 406 start to compress the touch button 410; When the contact member 407 contacts the top of the electric bicycle bracket, the lifting cylinder 405 on one side of the electric bicycle frame will drive the strip-shaped plate to move synchronously and gradually contact one side of the electric bicycle frame, starting to exert force on the electric bicycle frame for strength detection; it should be noted that, according to the shape of the electric bicycle frame, the electric bicycle frame can be subjected to vertical directional fixed-point force first, and then subjected to lateral force; the fixed module 2 can also be adjusted horizontally as needed, so as to facilitate vertical and lateral force at the same time; During the process of exerting force on the electric bicycle frame, the pulley set 503 sleeved on the surface of the rotating rod will drive the curved rod 502 to start rotating and contact and extrude the horizontal plate 501 to move upward, starting to compress the lower end of the transmission rod 201, so that the lower end of the transmission rod 201 collides with the upper end of the transmission rod 201 and generates vibration, acting on the fixed module 2, and then simulating the phenomenon of encountering bumps in the riding process, and cooperating with the sensors arranged at the key nodes of the electric bicycle frame, so as to test the fatigue degree of the electric bicycle frame, and realize the purpose of omnibearing detection. During the process of vertical and lateral force testing, if the electric bicycle frame deforms, the elastically installed vertical rod 406 will start to reset, when the upper end of the vertical rod 406 separates from the touch button 410, the touch button 410 starts to reset, so that one end of the magnetic attraction rod 409 generates magnetism, the telescopic head 408 is attracted, the telescopic head 408 separates from the force applying groove 404, and under the reaction force generated by the deformation of the connecting spring 4051, the lifting cylinder 405 can reset, the position sensor detects that the lifting cylinder 405 resets, sends an electrical signal to control one end of the magnetic attraction rod 409 to be powered off, so that the telescopic head 408 extends again and slides with the inner wall of the force applying groove 404, facilitating the next detection.

[0028] The above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the protection scope of the technical solutions of the embodiments of the present application.

Claims

1. An electric bicycle frame strength testing device, comprising a base (1), and a cavity is formed in the inside of the base (1), characterized in that: The upper portion of the base (1) is provided with a fixed module (2), the surface of the base (1) is fixedly installed with a portal frame (3), and the portal frame (3) is located directly above the fixed module (2), and the base (1) further comprises: Two groups of force applying assemblies (4) are arranged on the frame for applying pressure in multiple directions, each of the two groups of force applying assemblies (4) comprises two groups of driving teeth (401), the upper end of one group of the driving teeth (401) is fixedly connected with a driving source through a rotating shaft, and the two groups of driving teeth (401) are connected through a connecting piece (41), the surface of the driving tooth (401) is engaged with a matching tooth (402), the lower end of the matching tooth (402) is fixedly connected with a rotating cylinder (403), a plurality of force applying grooves (404) are equidistantly arranged on the inner wall of the rotating cylinder (403), a lifting cylinder (405) is arranged in the force applying groove (404), two groups of circular grooves are symmetrically arranged in the lifting cylinder (405), two groups of vertical rods (406) are elastically inserted into the lifting cylinder (405), a detachable contact piece (407) is rotatably connected to the lower end of the vertical rod (406), two groups of telescopic heads (408) are symmetrically inserted into the lifting cylinder (405), a magnetic attraction rod (409) is inserted into the telescopic head (408), and the magnetic attraction rod (409) is electrically connected with a touch button (410).

2. An electric bicycle frame strength testing device according to claim 1, wherein: The lower surface of the fixed module (2) is symmetrically provided with two groups of transmission rods (201), and the transmission rods (201) are arranged in the cavity formed in the base (1).

3. The electric bicycle frame strength testing device of claim 1, wherein: The force applying groove (404) is composed of a plurality of equidistantly distributed semi-annular grooves and arc grooves, and the two groups of semi-annular grooves are smoothly connected by the two groups of arc grooves, and the directions of the two groups of arc grooves are opposite.

4. The electric bicycle frame strength testing device of claim 1, wherein: The top surface of the lifting cylinder (405) is elastically connected to the inner top surface of the rotating cylinder (403) through a connecting spring (4051), two groups of limiting grooves (4052) are symmetrically arranged on the inner wall of the lifting cylinder (405), a limiting rod (4053) is slidably connected to the inner wall of the limiting groove (4052) through a limiting block, the upper end of the limiting rod (4053) penetrates the inner portion of the rotating cylinder (403) and is fixedly connected with the portal frame (3), and the limiting rod (4053) is rotatably connected with the rotating cylinder (403).

5. The electric bicycle frame strength testing device of claim 1, wherein: One end of the telescopic head (408) is in a spherical structure, and the telescopic head (408) is slidably connected to the inner wall of the force applying groove (404).

6. The electric bicycle frame strength testing device of claim 1, wherein: The touch button (410) is arranged directly above the vertical rod (406) and is fixedly installed in the circular groove formed in the inner wall of the lifting cylinder (405).

7. The electric bicycle frame strength testing device of claim 1, wherein: The connecting piece (41) comprises a first transmission wheel (4101) and a second transmission wheel (4102), the first transmission wheel (4101) is sleeved on the surface of the rotating shaft, the second transmission wheel (4102) is rotatably installed in the interior of the portal frame (3), and the second transmission wheel (4102) is fixedly connected with another set of driving teeth (401) through a rotating rod, the first transmission wheel (4101) and the second transmission wheel (4102) are drivingly connected through a transmission rope (4103), the surface of the transmission rope (4103) is frictionally and rollingly connected with two sets of guide wheels (4104), and the two sets of guide wheels (4104) are rotatably connected with the inner wall of the portal frame (3).

8. The electric bicycle frame strength testing device of claim 1, wherein: Further comprising a vibration assembly (5) for driving the fixed mold module (2) to generate up-down vibration, the vibration assembly (5) comprises a cross plate (501) arranged in the cavity, and the upper surface of the cross plate (501) is fixedly connected with the lower end of the transmission rod (201); a curved rod (502) is arranged below the cross plate (501), and one end of the curved rod (502) is fixedly connected with a belt pulley set (503).

9. An electric bicycle frame strength testing device according to claim 8, wherein: One end of the belt pulley set (503) is arranged in the interior of the base (1), and the other end of the belt pulley set (503) is sleeved on the surface of the rotating rod.

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