Frame rigidity testing device and frame rigidity testing method

Abstract

The present invention relates to a frame rigidity testing device and a frame rigidity testing method, comprising: a front fork assembly capable of being rotatably sleeved with a head tube of a frame; a first supporting mechanism and a second supporting mechanism spaced apart from each other in a first direction, the first supporting mechanism being used to support the front fork assembly, and the second supporting mechanism being used to support the rear fork of the frame; the first supporting mechanism and the second supporting mechanism being capable of limiting the movement of the frame in a height direction of the frame and in an extension direction of the five-way bracket of the frame, and allowing the frame to move in the first direction and swing in a circumferential direction around the extension direction; the first direction, the extension direction and the up-down direction being perpendicular to each other; a crank mechanism comprising a through-rod and two crank assemblies, the through-rod being capable of being passed through the five-way bracket, the crank assemblies being respectively connected to both ends of the through-rod along the extension direction, and one crank assembly being hinged to the second supporting mechanism; and a force applying mechanism being used to apply a force to one of the crank assemblies.

Description

Technical Field

[0001] The present invention relates to the field of testing technology, and in particular to a vehicle frame rigidity testing device and a vehicle frame rigidity testing method. Background Art

[0002] Bicycles play an important role in people's lives, and bicycle frames must maintain a certain degree of rigidity to ensure efficient pedaling. Rigidity refers to the ability of a frame to resist deformation during use (due to force or collision).

[0003] Before a bicycle is released to the market, its frame rigidity needs to be tested to determine whether it meets the required rigidity. This test is typically performed using frame rigidity testing equipment. However, the structural setup of traditional frame rigidity testing equipment results in the frame fixing method, force application points, and force application directions not being consistent with actual riding conditions, leading to inconsistent test data with actual riding. In other words, even if the final test data is excellent, it cannot guarantee that the frame rigidity of the bicycle released to market will be good. Summary of the Invention

[0004] Based on this, it is necessary to provide a frame rigidity testing device and a frame rigidity testing method that can improve the above problems.

[0005] A vehicle frame rigidity testing device, comprising:

[0006] A front fork assembly capable of being rotatably connected to the head tube of the frame;

[0007] a first supporting mechanism and a second supporting mechanism spaced apart from each other in a first direction, the first supporting mechanism being used to support the front fork assembly, and the second supporting mechanism being used to support the rear fork of the frame; the first supporting mechanism and the second supporting mechanism being capable of limiting the movement of the frame in a height direction of the frame and in an extension direction of the bottom bracket shell of the frame, and allowing the frame to move along the first direction and swing in a direction around the extension direction; the first direction, the extension direction, and the up-down direction being perpendicular to each other;

[0008] a crank mechanism comprising a through-rod and two crank assemblies, wherein the through-rod is capable of being passed through the five-way bracket, the two crank assemblies being respectively connected to both ends of the through-rod along the extension direction, and one crank assembly being hingedly connected to the second support mechanism;

[0009] A force applying mechanism is used to apply a force to one of the crank assemblies.

[0010] In one embodiment, the first support mechanism includes a first support seat and a first rotating shaft, the first support seat is provided with a first waist-shaped hole extending along the first direction, the first rotating shaft is passed through the first waist-shaped hole along the extending direction, and the front fork assembly is fixedly connected to the first rotating shaft; the first rotating shaft swings relative to the first support seat in the first direction and relative to the first support seat through the first waist-shaped hole, and the first waist-shaped hole moves in the direction of limiting the height of the frame; and / or

[0011] The second support mechanism includes a second support seat and a second rotating shaft. The second support seat is provided with a second waist-shaped hole extending along the first direction. The second rotating shaft is passed through the second waist-shaped hole along the extension direction. The rear fork is fixedly connected to the second rotating shaft. The second rotating shaft moves in the first direction relative to the second support seat and swings relative to the second support seat through the second waist-shaped hole. The second waist-shaped hole limits the movement of the frame in the height direction.

[0012] In one embodiment, the first support mechanism further includes a first limiting portion, a first limiting groove is provided on the first support seat, the first limiting portion is fixedly connected to the first rotating shaft, and the first limiting portion extends into the first limiting groove to limit the movement of the frame in the extension direction; and / or

[0013] The second support mechanism also includes a second limiting portion, a second limiting groove is provided on the second support seat, the second limiting portion is fixedly connected to the second rotating shaft, and the second limiting portion extends into the second limiting groove to limit the movement of the frame in the extension direction.

[0014] In one embodiment, the force applying mechanism is capable of applying an inward and downward force to the crank assembly.

[0015] In one embodiment, the force-applying mechanism includes a driving member and a force-applying rope, wherein both ends of the force-applying rope are respectively connected to the crank assembly and the driving member, and the driving member can drive the force-applying rope to apply force to the crank assembly.

[0016] In one embodiment, the driving member is a cylinder, and the cylinder is arranged along the height direction;

[0017] The frame rigidity testing device also includes a bending part, which is connected to the first support mechanism and / or the second support mechanism. The middle part of the force rope abuts against the bending part. The force rope can be bent under the action of the bending part to apply an inward and downward force to the crank assembly.

[0018] In one embodiment, the bending member includes a bracket and a guide wheel, the bracket is provided on the first support mechanism and / or the second support mechanism, the guide wheel is installed on the bracket, and the force rope abuts against the guide wheel.

[0019] In one embodiment, the angle between the portion of the force rope close to the crank assembly and the vertical plane is 10°-20°.

[0020] In one embodiment, the frame rigidity testing device further includes a testing mechanism, and the testing mechanism is used to test the deformation of the frame.

[0021] In one embodiment, the testing mechanism includes a plurality of micrometers, and the plurality of micrometers are used together to test the deformation of the frame along the first direction, the extension direction, the height direction, and the deformation in a plane formed by two mutually perpendicular directions.

[0022] A frame rigidity testing method comprises the following steps:

[0023] The frame is restricted from moving in a height direction of the frame and in an extension direction of the five-way bracket of the frame; and the frame is allowed to move in a first direction and to swing in a direction around the extension direction; the first direction, the extension direction, and the up-down direction are perpendicular to each other;

[0024] A force is applied to one of the crank assemblies located on either side of the frame, and the crank assembly transmits the force to the frame to perform a rigidity test on the frame. In the aforementioned frame rigidity testing device and method, when performing a rigidity test on the frame, the frame is restricted in its height and extension directions, while its movement in the first and circumferential directions is not restricted. The force-applying mechanism applies force to the frame via the crank assembly. This ensures that the frame's fixing method (the frame is restricted in its height and extension directions, while its movement in the first and circumferential directions is not restricted) and the force-applying point (directly applying force to the crank assembly, which transmits the force to the frame) are consistent with actual riding. When the test data is excellent, the rigidity of the frame of the bicycle ultimately released to the market can be guaranteed to be good. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 An axonometric view of a vehicle frame rigidity testing device provided in one embodiment of the present application (the vehicle frame is mounted on the testing device in the figure);

[0026] Figure 2 A partial structural diagram of a vehicle frame rigidity testing device provided in another embodiment of the present application;

[0027] Figure 3 A partial structural diagram of a vehicle frame rigidity testing device provided in yet another embodiment of the present application;

[0028] Figure 4 for Figure 1 Exploded view of the frame rigidity test rig shown in;

[0029] Figure 5 for Figure 4 A magnified view of the structure shown in FIG;

[0030] Figure 6 for Figure 3 An axonometric view of the frame rigidity test apparatus from another perspective shown in ;

[0031] Figure 7 for Figure 6 An enlarged view of the structure shown in C;

[0032] Figure 8 for Figure 4 An enlarged view of the structure shown in B;

[0033] Figure 9 for Figure 1 An axonometric view of the frame rigidity test apparatus from another perspective shown in ;

[0034] Figure 10 for Figure 9 An enlarged view of the structure shown in D.

[0035] 100. Frame rigidity test device; 10. Front fork assembly; 11. Sleeve tube; 12. Front fork; 20. First support mechanism; 21. First support seat; 211. First waist-shaped hole; 212. First support ear; 213. First limiting groove; 22. First rotation axis; 23. First limiting portion; 30. Second support mechanism; 31. Second support seat; 311. Second waist-shaped hole; 312. Second support ear; 313. Two limiting grooves; 32. Second rotating shaft; 33. Second limiting part; 40. Crank mechanism; 41. Through rod; 42. Crank assembly; 50. Force-applying mechanism; 51. Driving member; 52. Force-applying rope; 60. Bending member; 61. Bracket; 62. Guide wheel; 70. Testing mechanism; 71. Micrometer; 200. Frame; 201. Head tube; 202. Main beam tube; 203. Seat tube; 204. Rear fork; 205. Bottom bracket. DETAILED DESCRIPTION

[0036] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying 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 should not be understood as limiting the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0039] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0042] See Figure 1 One embodiment of the present application provides a frame rigidity testing device 100 capable of performing rigidity testing on a frame 200. Generally, the frame 200 includes a head tube 201, a main frame tube 202, a seat tube 203, a rear fork 204, and a bottom bracket 205. The head tube 201 and seat tube 203 are respectively disposed at both ends of the main frame tube 202, and the rear fork 204 and bottom bracket 205 are both connected to the seat tube 203. It should be understood that the frame 200 is not limited to the above configuration and can be appropriately modified based on the above configuration.

[0043] The frame rigidity testing device 100 includes a front fork assembly 10, a first support mechanism 20, and a second support mechanism 30. The front fork assembly 10 can be rotatably connected to the head tube 201 of the frame 200. Figure 2 The front fork assembly 10 includes a sleeve 11 and a front fork 12. The sleeve 11 can be sleeved with the head pipe 201 of the frame 200, and the front fork 12 is fixedly connected to the sleeve 11. The first support mechanism 20 and the second support mechanism 30 are spaced apart from each other in the first direction. The first support mechanism 20 is used to support the front fork assembly 10, and the second support mechanism 30 is used to support the rear fork 204 of the frame 200. The first support mechanism 20 and the second support mechanism 30 can limit the movement of the frame 200 in the height direction of the frame 200 and the extension direction of the five-way bracket 205 of the frame 200, and allow the frame 200 to move in the first direction and swing in the circumferential direction around the extension direction. The first direction, the extension direction and the up-down direction are perpendicular to each other. See Figure 1 , the first direction is Figure 1 The X direction in the extension direction is Figure 1 In the Y direction, the height direction is Figure 1 Middle Z direction.

[0044] The frame rigidity testing device 100 further includes a crank mechanism 40 and a force applying mechanism 50. Figure 1 and Figure 3The crank mechanism 40 includes a through-rod 41 and two crank assemblies 42. The through-rod 41 can be inserted into the bottom bracket 205. The two crank assemblies 42 are respectively connected to the ends of the through-rod 41 along the extension direction. One crank assembly 42 is hinged to the second support mechanism 30. The force applying mechanism 50 is used to apply a force to one of the crank assemblies 42.

[0045] Specifically, there are two force applying mechanisms 50, each corresponding to one crank assembly 42. However, during testing, only one force applying mechanism 50 is connected to its corresponding crank assembly 42 and applies force to the crank assembly 42 to match actual riding.

[0046] It should be noted that at least a portion of the through-rod 41 is rotatable relative to the bottom bracket 205 , so that the crank assembly 42 can rotate relative to the bottom bracket 205 , thereby enabling the crank assembly 42 to rotate relative to the second support mechanism 30 .

[0047] When performing a rigidity test on a frame 200, the frame rigidity testing device 100 is configured such that the front fork assembly 10 is sleeved onto the frame 200. The front end of the frame 200 is supported on the first support mechanism 20 via the front fork assembly 10, and the rear fork 204 of the frame 200 is supported on the second support mechanism 30. A through-rod 41 of the crank mechanism 40 is inserted into the bottom bracket 205 of the frame 200. Two crank assemblies 42 are connected to the ends of the through-rod 41, respectively. One crank assembly 42 is hingedly connected to the second support mechanism 30. A force-applying mechanism 50 is configured to apply a force to one of the crank assemblies 42, thereby applying a force to the frame 200 via the crank assembly 42, thereby performing a rigidity test on the frame 200.

[0048] In the frame rigidity testing device 100 provided in the embodiment of the present application, when performing a rigidity test on a frame 200, the frame 200 is restricted in its height and extension directions, while its movement in the first and circumferential directions is not restricted. The force-applying mechanism 50 applies a force to the frame 200 via the crank assembly 42. This ensures that the method of securing the frame 200 (the frame 200 is restricted in its height and extension directions, while its movement in the first and circumferential directions is not restricted) and the point of force application (the force is applied directly to the crank assembly 42, which transmits the force to the frame 200) are consistent with actual riding conditions. When the test data is excellent, the rigidity of the frame 200 of the bicycle ultimately released to the market can be guaranteed to be good.

[0049] In some embodiments, see Figure 4 and Figure 5The first support mechanism 20 includes a first support seat 21 and a first rotating shaft 22. The first support seat 21 is provided with a first waist-shaped hole 211 extending in the first direction. The first rotating shaft 22 is inserted into the first waist-shaped hole 211 along the extension direction. The front fork assembly 10 is fixedly connected to the first rotating shaft 22. The first rotating shaft 22 swings relative to the first support seat 21 in the first direction and relative to the first support seat 21 through the first waist-shaped hole 211. The first waist-shaped hole 211 limits the movement of the frame 200 in the height direction. That is, the first rotating shaft 22 can move in the first direction in the first waist-shaped hole 211, and the first waist-shaped hole 211 allows the first rotating shaft 22 to swing relative to the first support seat 21. It should be understood that in other embodiments, other methods can also be used to achieve the movement of the frame 200 relative to the first support seat 21 in the first direction and the swing relative to the first support seat 21, which is not limited here.

[0050] Specifically, the first support base 21 has a pair of first support ears 212 spaced apart in the extension direction. Each first support ear 212 has a first waist-shaped hole 211. The first rotation shaft 22 passes through the first waist-shaped hole 211 of one first support ear 212 and is inserted into the first waist-shaped hole 211 of the other first support ear 212. Of course, in other embodiments, the first support base 21 may also be provided with only one first support ear 212, which is not limited here.

[0051] For further information, see Figure 6 and Figure 7 The first support mechanism 20 further includes a first limiting portion 23. A first limiting groove 213 is provided on the first support seat 21. The first limiting portion 23 is fixedly connected to the first rotation shaft 22 and extends into the first limiting groove 213 to limit the movement of the frame 200 in the extension direction. Of course, in other embodiments, other methods can be used to limit the movement of the frame 200 in the extension direction, such as providing a first stop lever on the first support seat 21 and a second stop lever on the first rotation shaft 22, where the first stop lever and the second stop lever block and cooperate to limit the movement of the frame 200 in the extension direction.

[0052] In some embodiments, see Figure 4 and Figure 8The second support mechanism 30 also includes a second support seat 31 and a second rotating shaft 32. The second support seat 31 is provided with a second waist-shaped hole 311 extending along the first direction. The second rotating shaft 32 is inserted into the second waist-shaped hole 311 along the extension direction. The rear fork 204 is fixedly connected to the second rotating shaft 32. The second rotating shaft 32 swings relative to the second support seat 31 in the first direction and relative to the second support seat 31 through the second waist-shaped hole 311. The second waist-shaped hole 311 limits the movement of the frame 200 in the height direction. That is, the second rotating shaft 32 can move in the second waist-shaped hole 311 in the first direction, and the second waist-shaped hole 311 allows the second rotating shaft 32 to swing relative to the second support seat 31. It should be understood that in other embodiments, other methods can also be used to achieve the movement of the frame 200 in the first direction relative to the second support seat 31 and the swing relative to the second support seat 31, which is not limited here.

[0053] Specifically, the second support base 31 has a pair of second support ears 312 spaced apart in the extension direction. Each second support ear 312 has a second waist-shaped hole 311. The second rotation shaft 32 passes through the second waist-shaped hole 311 of one second support ear 312 and is inserted into the second waist-shaped hole 311 of the other second support ear 312. Of course, in other embodiments, the second support base 31 may also have only one second support ear 312, which is not limited here.

[0054] For further information, see Figure 9 and Figure 10 The second support mechanism 30 further includes a second limiting portion 33. A second limiting slot 313 is provided on the second support base 31. The second limiting portion 33 is fixedly connected to the second rotation shaft 32 and extends into the second limiting slot 313 to limit the movement of the frame 200 in the extension direction. Of course, in other embodiments, other methods can be used to limit the movement of the frame 200 in the extension direction. For example, a third lever can be provided on the second support base 31 and a fourth lever can be provided on the second rotation shaft 32. The third lever and the fourth lever can cooperate to block and limit the movement of the frame 200 in the extension direction.

[0055] In some embodiments, see Figure 1 The force applying mechanism 50 can apply an inward and downward force to one of the crank assemblies 42. In this way, the force applied to the frame 200 is consistent with the actual riding direction, and when the test data is good, the rigidity of the frame 200 of the bicycle finally put on the market is further guaranteed to be good.

[0056] It should be noted that applying an inward force to the crank assembly 42 means that the direction of the force applied to the crank assembly 42 is toward the frame 200 .

[0057] Continue reading Figure 2 The force-applying mechanism 50 includes a driving member 51 and a force-applying rope 52. The two ends of the force-applying rope 52 are respectively connected to the crank assembly 42 and the driving member 51. The driving member 51 can drive the force-applying rope 52 to apply a force to the crank assembly 42. The driving member 51 is a cylinder, and the cylinder is arranged along the height direction. The frame rigidity testing device 100 also includes a bending member 60. The bending member 60 is connected to the first support seat 21 and / or the second support seat 31. The middle part of the force-applying rope 52 abuts against the bending member 60. The force-applying rope 52 can be bent under the action of the bending member 60 to apply an inward and downward force to the crank assembly 42. It should be understood that the driving member 51 can also be arranged in other ways, such as the driving member 51 can also be a motor, etc.

[0058] Furthermore, the portion of the force application cable 52 near the crank assembly 42 is at an angle of 10°-20° to the vertical plane. This arrangement ensures that the angle of the force applied by the force application cable 52 to the crank assembly 42 matches the actual riding angle, thereby ensuring that the test data matches the actual rigidity of the frame 200.

[0059] In some embodiments, see Figure 2 The bending member 60 includes a bracket 61 and a guide wheel 62. The bracket 61 is provided on the first support seat 21 and / or the second support seat 31. The guide wheel 62 is mounted on the bracket 61. The force rope 52 abuts against the guide wheel 62. The guide wheel 62 plays the role of bending and guiding the force rope 52.

[0060] In some embodiments, see Figure 1 The vehicle frame rigidity testing device 100 further includes a testing mechanism 70 for testing the deformation of the vehicle frame 200. Specifically, the testing mechanism 70 includes a plurality of dial indicators 71, which are used to test the deformation of the vehicle frame 200 along the first direction, the extension direction, and the height direction, as well as the deformation within a plane formed by two mutually perpendicular directions.

[0061] In some specific implementations, please refer to Figure 2 The testing mechanism 70 includes five dial indicators 71, three of which are located on one crank assembly 42, and two of which are located on the other crank assembly 42. The five dial indicators 71 cooperate to test the deformation of the frame 200 along the first direction, the extension direction, and the height direction, as well as the deformation within a plane formed by two mutually perpendicular directions. It should be understood that in other embodiments, the type of the testing mechanism 70 is not limited, and when the testing mechanism 70 includes dial indicators 71, the number of dial indicators 71 is not limited, as long as the testing mechanism 70 can achieve the function of testing the deformation of the frame 200 along the first direction, the extension direction, and the height direction, as well as the deformation within a plane formed by two mutually perpendicular directions.

[0062] Another embodiment of the present application further provides a frame rigidity testing method, comprising the steps of:

[0063] The frame 200 is restricted from moving in the height direction and the extension direction of the bottom bracket 205 of the frame 200, and the frame 200 is allowed to move in the first direction and swing in the direction around the extension direction; the first direction, the extension direction and the height direction are perpendicular to each other;

[0064] A force is applied to one of the crank assemblies 42 located on both sides of the frame 200 , and the crank assembly 42 transmits the force to the frame 200 to perform a rigidity test on the frame 200 .

[0065] In the above frame rigidity testing method, the frame 200 is restricted in its height and extension directions, while its movement in the first and circumferential directions is unrestricted. A force is then applied to the frame 200 via the crank assembly 42. This ensures that the method of securing the frame 200 (the frame 200 is restricted in its height and extension directions, while its movement in the first and circumferential directions is unrestricted) and the point of force application (directly applying the force to the crank assembly 42, which transmits the force to the frame 200) are consistent with actual riding. With excellent test data, this ensures that the frame 200 of the bicycle ultimately released to the market will have good rigidity.

[0066] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A frame rigidity testing device, characterized in that: include: A front fork assembly (10) capable of being rotatably sleeved with a head tube (201) of a bicycle frame (200); A first supporting mechanism (20) and a second supporting mechanism (30) are spaced apart from each other in a first direction, the first supporting mechanism (20) being used to support the front fork assembly (10), and the second supporting mechanism (30) being used to support the rear fork (204) of the frame (200); the first supporting mechanism (20) and the second supporting mechanism (30) are capable of limiting the movement of the frame (200) in the height direction of the frame (200) and in the extension direction of the five-way bracket (205) of the frame (200), and allowing the frame (200) to move in the first direction and to swing in a direction around the extension direction; the first direction, the extension direction and the height direction are perpendicular to each other; A crank mechanism (40) comprises a penetrating rod (41) and two crank assemblies (42), wherein the penetrating rod (41) can be passed through the five-way bracket (205), the two crank assemblies (42) are respectively connected to two ends of the penetrating rod (41) along the extension direction, and one crank assembly (42) is hinged to the second support mechanism (30); a force applying mechanism (50) for applying a force to one of the crank assemblies (42); The first supporting mechanism (20) comprises a first supporting seat (21) and a first rotating shaft (22); the first supporting seat (21) is provided with a first waist-shaped hole (211) extending along the first direction; the first rotating shaft (22) is passed through the first waist-shaped hole (211) along the extending direction; the front fork assembly (10) is fixedly connected to the first rotating shaft (22); the first rotating shaft (22) moves in the first direction and swings relative to the first supporting seat (21) through the first waist-shaped hole (211); the first waist-shaped hole (211) limits the movement of the frame (200) in the height direction; and / or The second supporting mechanism (30) comprises a second supporting seat (31) and a second rotating shaft (32). The second supporting seat (31) is provided with a second waist-shaped hole (311) extending along the first direction. The rotating shaft (32) is provided in the second waist-shaped hole (311) along the extension direction, the rear fork (204) is fixedly connected to the second rotating shaft (32), the second rotating shaft (32) moves in the first direction relative to the second support seat (31) through the second waist-shaped hole (311) and swings relative to the second support seat (31), and the second waist-shaped hole (311) limits the movement of the frame (200) in the height direction; The first support mechanism (20) further comprises a first limiting portion (23), a first limiting groove (213) is provided on the first support seat (21), the first limiting portion (23) is fixedly connected to the first rotating shaft (22), and the first limiting portion (23) extends into the first limiting groove (213) to limit the movement of the frame (200) in the extension direction; and / or The second support mechanism (30) further includes a second limiting portion (33), a second limiting groove (313) is provided on the second support seat (31), the second limiting portion (33) is fixedly connected to the second rotating shaft (32), and the second limiting portion (33) extends into the second limiting groove (313) to limit the movement of the frame (200) in the extension direction; The force applying mechanism (50) comprises a driving member (51) and a force applying rope (52), wherein both ends of the force applying rope (52) are respectively connected to the crank assembly (42) and the driving member (51), and the driving member (51) can drive the force applying rope (52) to apply a force to the crank assembly (42).

2. The vehicle frame rigidity testing device according to claim 1, characterized in that: The force applying mechanism (50) is capable of applying an inward and downward force to the crank assembly (42).

3. The vehicle frame rigidity testing device according to claim 1, characterized in that: The driving member (51) is a cylinder, and the cylinder is arranged along the height direction; The frame rigidity testing device further comprises a bending member (60), wherein the bending member (60) is connected to the first supporting mechanism (20) and / or the second supporting mechanism (30), and the middle portion of the force application rope (52) abuts against the bending member (60). The force application rope (52) can be bent under the action of the bending member (60) to apply an inward and downward force to the crank assembly (42).

4. The vehicle frame rigidity testing device according to claim 3, characterized in that: The bending member (60) comprises a bracket (61) and a guide wheel (62); the bracket (61) is provided on the first supporting mechanism (20) and / or the second supporting mechanism (30); the guide wheel (62) is mounted on the bracket (61); and the force rope (52) abuts against the guide wheel (62).

5. The vehicle frame rigidity testing device according to claim 3, characterized in that: The angle between the portion of the force rope (52) close to the crank assembly (42) and the vertical plane is 10°-20°.

6. The vehicle frame rigidity testing device according to claim 1, characterized in that: The vehicle frame rigidity testing device further comprises a testing mechanism (70), and the testing mechanism (70) is used to test the deformation of the vehicle frame (200).

7. A method for testing vehicle frame rigidity using the vehicle frame rigidity testing device according to any one of claims 1 to 6, characterized in that: Including steps: The frame (200) is restricted from moving in a height direction of the frame (200) and in an extension direction of a five-way bracket (205) of the frame (200), and the frame (200) is allowed to move in a first direction and to swing in a direction around the extension direction; the first direction, the extension direction, and the height direction are perpendicular to each other; A force is applied to one of the crank assemblies (42) located on both sides of the frame (200), and the crank assembly (42) transmits the force to the frame (200) to perform a rigidity test on the frame (200).

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