Front fork bending fatigue test fixed mold

Abstract

The present invention relates to a fixed mold for a front fork bending fatigue test, comprising a support frame, a force-applying mechanism, a vertical rod fixing mechanism, a locking block and a pushing assembly, wherein the force-applying mechanism and the vertical rod fixing mechanism are installed on the support frame, the force-applying mechanism is used to drive the front fork to move up and down, the vertical rod is rotatably installed in the vertical rod fixing mechanism, the pushing assembly is used to push the locking block tightly against the vertical rod fixing mechanism, and the locking block is used to lock the vertical rod to prevent the vertical rod from shaking. During the test of the present invention, the vertical rod can rotate 360° in the vertical rod fixing mechanism to fully simulate the actual stress condition, and the locking block can be used to firmly lock the front fork to avoid abnormal phenomena such as loosening and shaking of the front fork during the test.

Description

Technical Field

[0001] The invention relates to a front fork fatigue test, and in particular to a front fork bending fatigue test fixed die. Background Art

[0002] The front fork of a bicycle refers to the part at the front of the bicycle structure. Its upper end is connected to the handlebar component, the frame component cooperates with the front tube, and the lower end cooperates with the front axle component, thus forming the guide system of the bicycle. During the use of the bicycle, the front fork will be subjected to multi-directional forces and is prone to damage. In order to ensure the good quality of the bicycle front fork before leaving the factory, it is usually necessary to use a fatigue test device to test the front fork. However, when performing the bending fatigue test of the front fork, the front fork vertical rod is directly locked with a mold, resulting in the front fork being restricted during the test and unable to rotate 360 ​​degrees. The test state does not match the actual use state of the front fork, so the test result is inaccurate. Summary of the invention

[0003] In order to overcome the above-mentioned defects, the present invention provides a fixed mold for a front fork bending fatigue test, in which a vertical rod fixing mechanism and a locking block are provided. The vertical rod can rotate 360° in the vertical rod fixing mechanism to fully simulate the actual stress condition. At the same time, the locking block can firmly lock the front fork to avoid abnormal phenomena such as loosening and shaking of the front fork during the test.

[0004] The technical solution adopted by the present invention to solve its technical problem is:

[0005] A front fork bending fatigue test fixed mold, comprising a support frame, a force-applying mechanism, a vertical rod fixing mechanism, a locking block and a pushing assembly, the force-applying mechanism and the vertical rod fixing mechanism are installed on the support frame, the force-applying mechanism is used to drive the front fork to move up and down, the vertical rod is rotatably installed in the vertical rod fixing mechanism, the pushing assembly is used to push the locking block to the vertical rod fixing mechanism, and the locking block is used to lock the vertical rod to prevent the vertical rod from shaking.

[0006] Preferably, the vertical rod fixing mechanism includes a connecting block, a bearing fixing block, a bearing and an open washer, the connecting block is fixed on the support frame, a bearing fixing block is fixedly installed on each of the left and right sides of the connecting block, the bearing is placed in the bearing fixing block, the vertical rod is inserted through the connecting block and the bearing fixing block, and the bearing is sleeved on the vertical rod.

[0007] Preferably, a lower ball plug is sleeved at the junction of the vertical rod and the front fork, an open washer is sleeved at one end of the vertical rod away from the front fork, and the open washer is placed in the bearing fixing block.

[0008] Preferably, an adjusting module is further provided, wherein the adjusting module is fixed on the supporting frame, the connecting block is fixed on the adjusting module, and the adjusting module is in a "C"-shaped structure.

[0009] Preferably, the locking block includes an upper locking block body and a lower locking block body, and the upper locking block body and the lower locking block body are spliced ​​together to form a cylindrical hollow structure inside for the vertical rod to be inserted, and the upper locking block body and the lower locking block body are locked by a first locking screw to clamp the vertical rod.

[0010] Preferably, the pushing assembly includes two pushing molds with the same structure, which are connected by a spring. The pushing mold includes an upper half of the pushing mold and a lower half of the pushing mold. After the upper half of the pushing mold and the lower half of the pushing mold are spliced ​​up and down, a cylindrical hollow structure is formed inside for the vertical rod to be inserted, and the upper half of the pushing mold and the lower half of the pushing mold are locked by a second locking screw, and the two pushing molds are clamped by a third locking screw.

[0011] Preferably, the spring is located in the two pushing dies, and when the spring is in a natural state, there is a gap between the two pushing dies, and the upper half of the pushing dies and the lower half of the pushing dies are each provided with a strip threaded hole along the horizontal direction thereof. When the third locking bolt is inserted into the strip threaded hole and locked, the two pushing dies fit each other and the spring inside the pushing dies is compressed.

[0012] Preferably, the force applying mechanism comprises a cylinder and a clamping member, the clamping member is used to fix the front fork, a piston rod of the cylinder is fixedly connected to the clamping member, and a force sensor is provided between the piston rod and the clamping member.

[0013] The beneficial effects of the present invention are as follows: the present invention comprises a force-applying mechanism, a vertical rod fixing mechanism, a locking block and a pushing assembly; the vertical rod is rotatably installed in the vertical rod fixing mechanism; the pushing assembly is used to assist the locking block in locking the vertical rod; the force-applying mechanism is used to drive the front fork to move up and down to simulate bending fatigue; the lower ball plug in the present invention ensures assembly with the bearing to avoid interference between the vertical rod and the connecting block; the actual bearing, lower ball plug and open washer can fully simulate the actual assembly condition; the modular structure of the bearing fixing block has high precision and can quickly change molds; the connecting block fully simulates the front tube of the frame; the locking block can fix the vertical rod, and the locking block can be pressed against the open washer by using a pushing mold with a special structure to ensure that when the front fork is tested, on the one hand, it can rotate 360 ​​degrees to fully simulate the actual force condition; on the other hand, it can firmly lock the front fork to avoid abnormal phenomena such as loosening and shaking of the front fork during the test. The present invention has a simple structure, is easy to operate and can 100% simulate the stress conditions of the front fork in actual use. The test results are highly accurate and reliable. After the use of the present invention, the test pass rate of new front forks is further improved, customer complaints are greatly reduced, and the requirements of ISO4210-2015 & JIS-2019 are 100% met. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention;

[0015] Figure 2 for Figure 1 The enlarged view of point A in the middle;

[0016] Figure 3 An exploded view of the present invention;

[0017] Figure 4 for Figure 3 The enlarged view of point B in the middle;

[0018] In the figure: 10-support frame, 11-front fork, 12-vertical rod, 13-adjusting module, 20-force applying mechanism, 21-cylinder, 22-piston rod, 23-force sensor, 24-clamping piece, 30-vertical rod fixing mechanism, 31-connecting block, 32-bearing fixing block, 33-bearing, 34-lower ball plug, 35-opening washer, 40-locking block, 41-locking block upper body, 42-locking block lower body, 43-first locking screw, 50-pushing assembly, 51-pushing mold, 52-pushing mold upper body, 53-pushing mold lower body, 54-second locking screw, 55-third locking screw. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0021] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0022] Example: Figure 1-4As shown, a front fork bending fatigue test fixed mold includes a support frame 10, a force-applying mechanism 20, a vertical rod fixing mechanism 30, a locking block 40 and a pushing assembly 50. The force-applying mechanism 20 and the vertical rod fixing mechanism 30 are installed on the support frame 10. The force-applying mechanism 20 is used to drive the front fork 11 to move up and down. The vertical rod 12 is rotatably installed in the vertical rod fixing mechanism 30. The pushing assembly 50 is used to push the locking block 40 to the vertical rod fixing mechanism 30. The locking block 40 is used to lock the vertical rod to prevent the vertical rod from shaking. After the front fork 11 and the vertical rod 12 are installed, one end of the vertical rod 12 is passed through and extended out of the vertical rod fixing mechanism 30, and then the locking block 40 is sleeved on the extended vertical rod and the locking block 40 is pressed toward the side of the vertical rod fixing mechanism, and then the pushing assembly 50 is sleeved on the vertical rod 12 outside the locking block, and the locking block is pushed tightly to the vertical rod fixing mechanism 30 by the elastic force of the spring in the pushing assembly, and finally the locking block 40 is locked with the first locking screw 43 and the pushing assembly 50 is removed; the force-applying mechanism 20 is connected to the other end of the vertical rod and drives the vertical rod to move up and down to simulate the front fork bending fatigue test process. During the test, the vertical rod can rotate 360° in the vertical rod fixing mechanism, and the front fork is firmly locked by the locking block to prevent the front fork from loosening, shaking and other abnormal phenomena.

[0023] like Figure 1 As shown, the force applying mechanism 20 includes a cylinder 21 and a clamping member 24, the clamping member 24 is used to fix the front fork 11, the piston rod 22 of the cylinder is fixedly connected to the clamping member 24, and a force sensor 23 is provided between the piston rod 22 and the clamping member 24. The force applying mechanism 20 is located below the front fork 11. During the test, the cylinder 21 drives the front fork to move up and down to simulate the fatigue test of the bending of the front fork.

[0024] like Figure 3 As shown, the vertical rod fixing mechanism 30 includes a connecting block 31, a bearing fixing block 32, a bearing 33 and an open washer 35. The connecting block 31 is fixed on the support frame 10. A bearing fixing block 32 is fixedly installed on each of the left and right sides of the connecting block 31. The bearing 33 is placed in the bearing fixing block 32. The vertical rod 12 is inserted through the connecting block 31 and the bearing fixing block 32, and the bearing 33 is sleeved on the vertical rod 12.

[0025] The joint of the vertical rod 12 and the front fork 11 is sleeved with a lower ball plug 34, and the end of the vertical rod 12 away from the front fork 11 is sleeved with an open washer 35, and the open washer 35 is placed in the bearing fixing block 32. In actual operation, according to the model of the front fork 11, a suitable lower ball plug 34 is selected, and the lower ball plug is pressed against the joint of the front fork and the vertical rod, and then a set of actual bearings 33 is installed into two dedicated bearing fixing blocks 32, and then the two bearing fixing blocks 32 are respectively installed on the left and right sides of the connecting block 31, and the bearing fixing blocks 32 can be fixed to the connecting block 31 by four locking screws, and then the vertical rod 12 is inserted into the mounting hole in the connecting block 31, and one end of the vertical rod passes through the connecting block 31, and then an open washer 35 is sleeved into one end of the vertical rod and pressed into the bearing fixing block 32 on the right. The lower ball plug ensures assembly with the bearing to avoid interference between the vertical rod and the connecting block; the actual bearing and open washer can completely simulate the actual assembly condition, the modular structure of the bearing fixing block has high precision and can quickly change the mold; the connecting block completely simulates the front tube of the frame.

[0026] like Figure 3 As shown, in one embodiment, an adjustment module 13 is further provided, the adjustment module 13 is fixed on the support frame 10, the connection block 31 is fixed on the adjustment module 13, and the adjustment module 13 is in a "C"-shaped structure. Two symmetrically arranged adjustment modules are fixedly installed on the support frame 10, and the connection block 31 is installed on the adjustment module 13. The function of the adjustment module is to adjust the height of the connection block to meet the installation and testing requirements of special front forks.

[0027] like Figure 4 As shown, the locking block 40 includes a locking block upper half 41 and a locking block lower half 42. The locking block upper half 41 and the locking block lower half 42 are spliced ​​up and down to form a cylindrical hollow structure for the vertical rod to be inserted, and the locking block upper half 41 and the locking block lower half 42 are locked by a first locking screw 43 to clamp the vertical rod 12. The first locking screw 43 passes through the threaded holes in the locking block upper half and the locking block lower half from top to bottom to lock the two.

[0028] like Figure 4As shown, the pushing assembly 50 includes two pushing molds 51 with the same structure, and the two pushing molds 51 are connected by a spring. The pushing mold 51 includes a pushing mold upper half 52 and a pushing mold lower half 53. The pushing mold upper half 52 and the pushing mold lower half 53 are spliced ​​up and down to form a cylindrical hollow structure for the vertical rod to be inserted. The pushing mold upper half 52 and the pushing mold lower half 53 are locked by a second locking screw 54, and the two pushing molds 51 are clamped by a third locking screw 55. The spring is located in the two pushing molds 51, and when the spring is in a natural state, there is a gap between the two pushing molds 51. The pushing mold upper half 52 and the pushing mold lower half 53 are each provided with a strip threaded hole along the horizontal direction thereof. When the third locking bolt 55 is inserted into the strip threaded hole and locked, the two pushing molds 51 fit each other and the spring inside the pushing mold is compressed.

[0029] During installation, the locking block 40 is inserted into one end of the vertical rod, and the pushing assembly 50 is inserted into the vertical rod outside the locking block, wherein the pushing mold on the left side is close to the locking block 40, and the pushing assembly is pressed toward the side of the bearing fixing block 32, and then the third locking screw 55 is locked so that the two pushing molds 51 are close and pressed, and the spring in the pushing mold is compressed, and then the second locking screw 54 of the right pushing mold is locked so that the right pushing mold and the vertical rod are firmly locked, and then the third locking screw 55 is loosened, and the left pushing mold moves to the left under the pressure of the spring and pushes the locking block 40, so that the pushing block 40 presses the opening washer 35, and then the first locking screw 43 on the locking block is locked to lock the locking block to the vertical rod; finally, the second locking screw 54 on the pushing mold is loosened, and the pushing mold is removed. The locking block can fix the vertical rod, and the locking block can be pressed against the open washer by utilizing a push mold with a special structure to ensure that when the front fork is tested, on the one hand, it can rotate 360° to fully simulate the actual stress condition, and on the other hand, it can firmly lock the front fork to avoid abnormal phenomena such as loosening and shaking of the front fork during the test.

[0030] The operation process of the present invention: the steps are as follows:

[0031] Step 1: During the actual operation, according to the model of the front fork 11, select a suitable lower ball plug 34, and press the lower ball plug assembly tightly to the junction of the front fork and the vertical rod;

[0032] Step 2: Install a set of bearings 33 into two dedicated bearing fixing blocks 32, and then install the two bearing fixing blocks 32 on the left and right sides of the connecting block 31 respectively. The bearing fixing blocks 32 can be fixed to the connecting block 31 by four locking screws;

[0033] Step 3: Insert the vertical rod 12 into the mounting hole in the connecting block 31, and let one end of the vertical rod pass through the connecting block 31. Then insert an open washer 35 into one end of the vertical rod and press it into the bearing fixing block 32 on the right side. Then insert the locking block 40 into one end of the vertical rod.

[0034] Step 4: Insert the pushing assembly 50 onto the vertical rod outside the locking block, press the pushing assembly toward the bearing fixing block 32, and then tighten the third locking screw 55 so that the two pushing molds 51 are close to each other and pressed together. The spring in the pushing mold is compressed, and then tighten the second locking screw 54 of the right pushing mold so that the right pushing mold and the vertical rod are firmly locked.

[0035] Step 5: Loosen the third locking screw 55 again, and the left side pushing mold moves to the left under the pressure of the spring to push the locking block 40, so that the pushing block 40 presses against the opening washer 35, and then lock the first locking screw 43 on the locking block to lock the locking block 40 to the vertical rod 12; finally, loosen the second locking screw 54 on the pushing mold, and remove the pushing mold;

[0036] Step 6: Finally, clamp the clamping member 24 to the end of the front fork away from the vertical rod, and start the cylinder 21, which drives the front fork to move up and down to simulate the fatigue test of the bending of the front fork.

[0037] It should be noted that, for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these modifications and improvements all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A fixed die for front fork bending fatigue test, characterized in that: The invention comprises a support frame (10), a force-applying mechanism (20), a vertical rod fixing mechanism (30), a locking block (40) and a pushing assembly (50), wherein the force-applying mechanism (20) and the vertical rod fixing mechanism (30) are installed on the support frame (10), the force-applying mechanism (20) is used to drive the front fork (11) to move up and down, the vertical rod (12) is rotatably installed in the vertical rod fixing mechanism (30), the pushing assembly (50) is used to push the locking block (40) against the vertical rod fixing mechanism (30), and the locking block (40) is used to lock the vertical rod to prevent the vertical rod from shaking; The vertical rod fixing mechanism (30) comprises a connecting block (31), a bearing fixing block (32), a bearing (33) and an open washer (35); the connecting block (31) is fixed on the supporting frame (10); a bearing fixing block (32) is fixedly installed on the left and right sides of the connecting block (31); the bearing (33) is placed in the bearing fixing block (32); the vertical rod (12) is passed through the connecting block (31) and the bearing fixing block (32); and the bearing (33) is sleeved on the vertical rod (12); A lower ball plug (34) is sleeved at the junction of the vertical rod (12) and the front fork (11), an open washer (35) is sleeved at one end of the vertical rod (12) away from the front fork (11), and the open washer (35) is placed in the bearing fixing block (32); The fixed mold is also provided with an adjustment module (13), the adjustment module (13) is fixed on the support frame (10), the connection block (31) is fixed on the adjustment module (13), and the adjustment module (13) is in a "C"-shaped structure.

2. The front fork bending fatigue test fixed mold according to claim 1, characterized in that: The locking block (40) comprises an upper locking block body (41) and a lower locking block body (42). When the upper locking block body (41) and the lower locking block body (42) are spliced ​​together, a cylindrical hollow structure is formed inside for the vertical rod to be inserted. The upper locking block body (41) and the lower locking block body (42) are locked by a first locking screw (43) to clamp the vertical rod (12).

3. The front fork bending fatigue test fixed mold according to claim 1, characterized in that: The pushing assembly (50) comprises two pushing dies (51) of identical structure, the two pushing dies (51) being connected by a spring, the pushing dies (51) comprising an upper pushing dies body (52) and a lower pushing dies body (53), the upper pushing dies body (52) and the lower pushing dies body (53) being spliced ​​up and down to form a cylindrical hollow structure inside for the vertical rod to be inserted, the upper pushing dies body (52) and the lower pushing dies body (53) being locked by a second locking screw (54), and the two pushing dies (51) being clamped by a third locking screw (55).

4. The front fork bending fatigue test fixed mold according to claim 3, characterized in that: The spring is located in the two pushing dies (51), and when the spring is in a natural state, there is a gap between the two pushing dies (51). The upper half (52) and the lower half (53) of the pushing die are each provided with a strip threaded hole along the horizontal direction thereof. When the third locking screw (55) is inserted into the strip threaded hole and locked, the two pushing dies (51) fit each other and the spring inside the pushing dies is compressed.

5. The front fork bending fatigue test fixed mold according to claim 1, characterized in that: The force applying mechanism (20) comprises a cylinder (21) and a clamping member (24), wherein the clamping member (24) is used to fix the front fork (11), the piston rod (22) of the cylinder is fixedly connected to the clamping member (24), and a force sensor (23) is provided between the piston rod (22) and the clamping member (24).

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