Durability testing device for crank transmission system of bicycle

Abstract

The utility model discloses a durability test device for a bicycle crank transmission system, which relates to the technical field of experimental equipment and comprises a frame, a support member mounted on the frame, a first through hole arranged on the support member and used for allowing a mandrel of a pedal crank structure to be tested to pass through, and a fixing disc arranged on the support member and used for fixing the mandrel of the pedal crank structure to be tested. The fixing disc is provided with a second through hole which is the same as the first through hole, the fixing disc is provided with a plurality of connecting holes which are used for fixing the pedal crank structure disc to be tested and the fixing disc, and the fixing disc is detachably installed on the supporting piece through a fixing bolt. The force application mechanism is used for repeatedly and simultaneously applying pressure to pedal rods at two ends of the to-be-tested pedal crank structure, thereby solving the problems of poor universality and tedious installation of previous testing equipment, reducing the testing cost, realizing continuous treading testing, shortening the testing period and improving the testing efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to experimental equipment technical field, more specifically, relate to a pedal cycle crank drive system endurance test device. BACKGROUND

[0002] According to the safety technical requirement of fixed fitness bicycle and lower limb crank fitness equipment, the transmission components and rotating parts should be protected to provide better safety protection for users.

[0003] In order to meet the endurance test of pedal crank drive system of fitness bicycle, the test equipment includes pedal crank assembly dynamic and static fatigue testing machine, and the equipment can fatigue test pedal crank assembly of fitness bicycle to evaluate its endurance.

[0004] The above experiment needs to test the endurance by simulating the left and right feet of the exerciser stepping on the pedal, but the current experimental test device is difficult to quickly install and test the pedal crank drive system of different models and sizes, resulting in poor universality.

[0005] In summary, how to provide a kind of installation test device for different size pedal crank drive system is the problem that the technical personnel in the prior art urgently need to solve. INVENTION CONTENTS

[0006] Therefore, the utility model aims at providing a pedal cycle crank drive system endurance test device, which can be used for testing pedal crank drive systems of more sizes, and the adjustment method is simple.

[0007] In order to achieve the above purpose, the utility model provides the following technical scheme:

[0008] A pedal cycle crank drive system endurance test device comprises:

[0009] A rack is provided with a support, and the support is provided with a first through hole for the core shaft of the pedal crank structure to be tested to pass through;

[0010] A fixed disc is provided with a second through hole, a plurality of connecting holes for fixing the disc of the pedal crank structure to be tested to the fixed disc, and the fixed disc is detachably installed on the support through a fixed bolt.

[0011] A force applying mechanism is used to simultaneously apply pressure to the pedal rods at both ends of the pedal crank structure to be tested.

[0012] Further, the support is provided with a plurality of arc-shaped adjustment holes, and the fixed bolt is slid in the adjustment holes to adjust the angle of the fixed disc.

[0013] The utility model further, a plurality of connecting hole is the strip shape along the fixed disc radius direction extension, the test pedal crank structure disc is connected through a plurality of fixed bolts passes through the corresponding connecting hole, realize the test pedal crank structure disc with the fixed disc of fixed.

[0014] The utility model further, the connecting seat is slidably installed in the connecting hole, and a positioning hole is arranged on the connecting seat.

[0015] The utility model further, the force applying mechanism comprises:

[0016] The sleeve ring is used for sleeving the pedal rod of the test pedal crank structure inside;

[0017] The force applying piece is used for driving the sleeve ring to apply pressure to the pedal rod.

[0018] The utility model further, the force applying piece can adopt the air cylinder, and the sleeve ring is driven to apply pressure to the pedal rod by the intermittent force control of the telescopic rod of air cylinder;

[0019] Alternatively, the force applying piece can adopt the electric cylinder, and the sleeve ring is driven to apply pressure to the pedal rod by the intermittent force control of the telescopic rod of electric cylinder;

[0020] Alternatively, the force applying piece can adopt the hydraulic cylinder, and the sleeve ring is driven to apply pressure to the pedal rod by the intermittent force control of the telescopic rod of hydraulic cylinder.

[0021] The utility model further further includes:

[0022] The support mechanism is installed on the rack and is used for supporting the mandrel of the test pedal crank structure.

[0023] The utility model further, the support mechanism comprises:

[0024] The upper support seat and the lower support seat are fixed by bolts and can adjust the gap, and the corresponding recess is arranged on the opposite side of the upper support seat and the lower support seat.

[0025] The support rod is connected with the lower support seat and is used for supporting the lower support seat, and the height of the lower support seat can be adjusted by the support rod.

[0026] The utility model further, the recess is the triangle structure of the opening opposite.

[0027] The utility model further, the support mechanism further includes:

[0028] The slide rail is installed on the rack.

[0029] A slider is slidingly installed on the slide rail, and the support rod is threadedly connected with the slider.

[0030] The pedal crank structure includes a mandrel, two crank rods are respectively installed at two ends of the mandrel, a disc is fixed on the mandrel in a coaxial manner, pedal rods are installed at end portions of the two crank rods, a support member is installed on a rack, a first through hole through which the mandrel of the pedal crank structure to be tested passes is arranged on the support member, a second through hole same as the first through hole is arranged on the fixing disc, that is, the mandrel passes through the first through hole and the second through hole during detection, a connecting hole for fixing the disc of the pedal crank structure to be tested on the fixing disc is arranged on the fixing disc, and the disc is fixed on the fixing disc through bolts, so that the pedal crank structure to be tested is fixed, the force applying mechanism is used for repeatedly and simultaneously applying pressure on the pedal rods at two ends of the pedal crank structure to be tested, so that the durability of the pedal rods is tested, and the fixing disc is detachably installed on the support member through fixing bolts, so that when different pedal crank structures are tested, only the fixing disc with different sizes needs to be replaced, the problems of poor universality and complicated installation of the previous test equipment are solved, the test cost is reduced, continuous pedaling test is realized, the test period is shortened, and the test efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0032] Figure 1 The structure schematic view of the left side of the shaft of the device provided by the present application is shown in the figure.

[0033] Figure 2 The structure schematic view of the device after the fixing disc is disassembled is shown in the figure.

[0034] Figure 3 The structure schematic view of the right side of the shaft of the device provided by the present application is shown in the figure.

[0035] Figure 4 The structure schematic view of the front of the device provided by the present application is shown in the figure.

[0036] Figures 1-4 In the figure, the reference signs include:

[0037] 1, rack; 2, support; 201, adjusting hole; 202, fixing bolt; 3, first through hole; 4, fixing disc; 401, second through hole; 402, connecting hole; 403, connecting seat; 404, positioning hole; 5, force applying mechanism; 501, force applying piece; 502, collar; 6, supporting mechanism; 601, slide rail; 602, slide block; 603, supporting rod; 604, lower supporting seat; 605, upper supporting seat; 606, groove. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0039] The core of the utility model provides a pedal crank transmission system endurance test device, can be applicable to more size pedal crank test, and the adjustment mode is simple and convenient.

[0040] Please refer to Figures 1-4 A pedal crank transmission system endurance test device, including rack 1, fixing disc 4 and force applying mechanism 5, the support 2 is installed on the rack 1, the first through hole 3 for the pedal crank structure core shaft to be tested to pass through is arranged on the support 2, the second through hole 401 identical with the first through hole 3 is arranged on the fixing disc 4, the connecting hole 402 for the pedal crank structure disc to be tested and the fixing disc 4 are fixed is arranged on the fixing disc 4, and the force applying mechanism 5 is used to repeatedly and simultaneously apply pressure to the pedal rod at both ends of the pedal crank structure to be tested.

[0041] In use, the pedal crank structure comprises a mandrel, crank rods are respectively installed at two ends of the mandrel, a disc is coaxially fixed on the mandrel, foot pedals are installed at the ends of the two crank rods, the support 2 is installed on the rack 1, the first through hole 3 for the mandrel of the pedal crank structure to be tested to pass through is arranged on the support 2, the second through hole 401 same as the first through hole 3 is arranged on the fixing disc 4, that is, the mandrel passes through the first through hole 3 and the second through hole 401 during detection, the connecting hole 402 for the disc of the pedal crank structure to be tested to be fixed on the fixing disc 4 is arranged on the fixing disc 4, and the disc is fixed on the fixing disc 4 through bolts, so that the pedal crank structure to be tested is fixed, the forcing mechanism 5 is used for repeatedly and simultaneously applying pressure to the foot pedals at two ends of the pedal crank structure to be tested, so that the durability test of the foot pedals is realized, and the fixing disc 4 is detachably installed on the support 2 through fixing bolts, so that when different pedal crank structures are tested, only the fixing disc 4 of different sizes needs to be replaced, the previous problems of poor universality and complicated installation of the test equipment are solved, the test cost is reduced, the continuous pedaling test is realized, the test period is shortened, and the test efficiency is improved.

[0042] It should be noted that the support 2 is in a plate-shaped structure and is vertically installed on the rack 1 in the embodiment of the utility model.

[0043] In addition, the first through hole 3 and the second through hole 401 have the same hole diameter and are coaxially arranged.

[0044] Please refer to Figures 1-4 In order to enable the crank of the pedal crank structure to be tested to have different angles and to complete the durability test at different angles, in some embodiments, a plurality of arc-shaped adjusting holes 201 are arranged on the support 2, the fixing bolts slide in the adjusting holes 201, and the angle of the fixing disc 4 is adjusted, that is, a plurality of adjusting holes 201 with the same radius are arranged and are coaxially arranged with the second through hole 401, when the angle of the fixing disc 4 needs to be adjusted, the fixing bolts are simultaneously rotated and slide in the adjusting holes 201, so that the angle of the fixing disc 4 is adjusted, and the disc and the crank of the pedal crank structure to be tested are adjusted to different angles, so that the durability test at different angles is realized.

[0045] It should be noted that the fixing bolts are threadedly installed on the fixing disc 4 in the embodiment of the utility model, and anti-skid washers or anti-skid lines are arranged on the contact surface between the bolts and the support 2, so that the stability during the test is improved.

[0046] Please refer to Figure 4In order to adapt to the fixing of pedals of different sizes, in some embodiments, the fixing disc 4 is provided with a plurality of connecting holes 402 extending along the radius direction thereof, and the pedal structure to be tested is fixed to the fixing disc 4 by penetrating a plurality of fixing bolts 202 through the corresponding connecting holes 402, that is, by providing a plurality of connecting holes 402 on the fixing disc 4, the fixing of pedals of different sizes can be completed, which is convenient and fast, and greatly improves the universality of the test device.

[0047] Optionally, in order to further improve the convenience and firmness of the fixing of the pedal, in some embodiments, a connecting seat 403 is slidingly installed in the connecting hole 402, and the connecting seat 403 is provided with a positioning hole 404, that is, by slidingly installing the connecting seat 403 in the connecting hole 402 and providing the positioning hole 404 on the connecting seat 403, when the pedal is installed, only the positioning rod needs to be inserted into the positioning hole 404 on the connecting seat 403, so that the pedal can be fixed, which is more efficient, convenient to disassemble, and more firm in fixing the pedal.

[0048] Optionally, in some embodiments, the positioning hole 404 can be a countersunk hole, specifically, a nut is sunk into the connecting hole, and is threadedly connected with the countersunk hole by a bolt, which is beneficial to improve the firmness of the pedal fixing.

[0049] In other embodiments, the positioning hole 404 can be a threaded hole.

[0050] Optionally, in some embodiments, the side of the connecting seat 403 away from the support 2 is below the surface of the fixing disc 4, so as to avoid interference with the fixing of the pedal.

[0051] Please refer to Figures 1-4 In some embodiments, the force applying mechanism 5 includes a sleeve 502 and a force applying member 501, the sleeve 502 is used to sleeve the pedal rod of the pedal structure to be tested, and the force applying member 501 is used to drive the sleeve 502 to apply pressure to the pedal rod, specifically, when the pedal structure to be tested is tested, after the pedal structure to be tested is fixed, the sleeve 502 is sleeved on the pedal rod, and the force applying member 501 applies pressure to the pedal rod to complete the required detection.

[0052] Optionally, in some embodiments, the sleeve 502 can adopt an oval structure, or the sleeve 502 can adopt a plate structure instead.

[0053] Optionally, in some embodiments, the force applying member 501 can adopt a pneumatic cylinder, and the piston rod of the pneumatic cylinder intermittently applies force to drive the sleeve 502 to apply pressure to the pedal rod.

[0054] In other embodiments, the force applying member 501 can adopt an electric cylinder, and the driving collar 502 applies pressure to the pedal lever through the intermittent force control of the telescopic rod of the electric cylinder.

[0055] In other embodiments, the force applying member 501 can adopt a hydraulic cylinder, and the driving collar 502 applies pressure to the pedal lever through the intermittent force control of the telescopic rod of the hydraulic cylinder.

[0056] In other embodiments, the force applying member 501 can adopt a motor lead screw structure, specifically, a sliding block 602 is screwed on the lead screw, the collar 502 is installed on the sliding block 602, and the collar 502 applies pressure to the pedal lever by driving the lead screw through the motor. The intermittent force refers to the cycle process of applying force, unloading, reapplying force, and reloading. In the test process, the pedal crank structure is fixed.

[0057] Please refer to Figures 1-4 In order to reduce the force arm of the crank during the test, in some embodiments, a supporting mechanism 6 is further included, which is installed on the rack 1 and is used to support the mandrel of the pedal crank structure to be tested, that is, the supporting mechanism 6 is arranged on the side of the mandrel that is longer in length to support the mandrel, so as to reduce the force arm of the crank and be applicable to more products with different axial lengths, which is beneficial to further improve the versatility of the device.

[0058] Optionally, in some embodiments, the supporting mechanism 6 includes an upper support seat 605 and a lower support seat 604, the upper support seat 605 and the lower support seat 604 are fixed by bolts and the gap therebetween is adjustable, the upper support seat 605 and the lower support seat 604 are provided with corresponding grooves 606, and a supporting rod 603 is connected with the lower support seat 604 and is used to support the lower support seat 604, the height of the lower support seat 604 can be adjusted by the supporting rod 603. Specifically, during the test, the mandrel is arranged between the upper support seat 605 and the lower support seat 604 and in the grooves 606, and then the upper support seat 605 and the lower support seat 604 are locked by bolts, so as to complete the fixation and support of the mandrel.

[0059] Optionally, in some embodiments, the upper support seat 605 is rotatably installed on the lower support seat 604, which further improves the convenience during the installation of the device.

[0060] Optionally, in some embodiments, the grooves 606 are triangular structures with opposite openings, which can provide effective support for mandrels with different diameters and have the function of automatic centering.

[0061] In other embodiments, the supporting rod 603 is rotatably connected with the lower support seat 604.

[0062] Please refer toFigures 1-4 In order to be able to adjust to different axial length of the mandrel, further meet the purpose of reducing the crank arm, in some embodiments, the supporting mechanism 6 further comprises a slide rail 601 and a sliding block 602, the slide rail 601 is installed on the rack 1, the sliding block 602 is slidingly installed on the slide rail 601, and the supporting rod 603 is threadedly connected with the sliding block 602, that is, by arranging the slide rail 601 arranged along the mandrel axis direction, the sliding block 602 is slid on the slide rail 601, and then different length of the mandrel is quickly adjusted, the purpose of reducing the crank arm is met, and the versatility of the device is further improved.

[0063] Optionally, in some embodiments, a bolt can be installed on the sliding block 602, and the fixing and movement of the sliding block 602 are controlled by contact and non-contact between the bolt and the slide rail 601.

[0064] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0065] The above describes in detail the bicycle crank transmission system durability test device provided by the utility model. The principle and implementation mode of the utility model are described by applying specific examples. The above embodiment is only used to help understand the method and core idea of the utility model. It should be pointed out that for ordinary skilled persons in the technical field, some improvements and modifications can be made to the utility model without departing from the principle of the utility model, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A pedal crank drive system endurance test apparatus, characterised in that, Include: Frame (1), the frame (1) is installed with support (2), the support (2) is equipped with first through hole (3) for the core shaft of the pedal crank structure to be tested to pass through; Fixed disc (4), the fixed disc (4) is equipped with second through hole (401), the fixed disc (4) is equipped with a plurality of connecting holes (402) for fixing the disc to be tested pedal crank structure and the fixed disc (4), the fixed disc (4) is detachably installed on the support (2); Force applying mechanism (5), the force applying mechanism (5) is used for simultaneously applying pressure to the pedal rod at both ends of the pedal crank structure to be tested.

2. A durability testing device for a bicycle crank drive system as defined in claim 1, wherein A plurality of connecting holes (402) are strip-shaped along the radial direction of the fixed disc, and the disc to be tested pedal crank structure is connected by a plurality of fixed bolts (202) through the corresponding connecting holes (402), so as to realize the fixation of the disc to be tested pedal crank structure and the fixed disc (4).

3. A durability testing apparatus for a bicycle crank drive system as defined in claim 2, wherein The connecting seat (403) is slidably installed in the connecting hole (402), and the connecting seat (403) is provided with a positioning hole (404).

4. A durability testing apparatus for a bicycle crank drive system as defined in claim 2, wherein The support (2) is provided with a plurality of arc-shaped adjusting holes (201), and the fixed bolt (202) is slidably arranged in the adjusting hole (201) to adjust the angle of the fixed disc (4).

5. A durability testing device for a bicycle crank drive system as defined in claim 1, wherein The force applying mechanism (5) comprises: Sleeve ring (502), the sleeve ring (502) is used for sleeving the pedal rod of the pedal crank structure to be tested inside; Force applying member (501), the force applying member (501) is used for driving the sleeve ring (502) to apply pressure to the pedal rod.

6. A durability testing apparatus for a bicycle crank drive system as defined in claim 5, wherein The force applying member (501) can adopt a pneumatic cylinder, and the sleeve ring (502) is driven to apply pressure to the pedal rod by the intermittent force control of the telescopic rod of the pneumatic cylinder. Alternatively, the force applying member (501) can adopt an electric cylinder, and the sleeve ring (502) is driven to apply pressure to the pedal rod by the intermittent force control of the telescopic rod of the electric cylinder. Alternatively, the force applying member (501) can adopt a hydraulic cylinder, and the sleeve ring (502) is driven to apply pressure to the pedal rod by the intermittent force control of the telescopic rod of the hydraulic cylinder.

7. A bicycle crank drive system endurance testing apparatus according to any one of claims 1-6, wherein, Also include: Supporting mechanism (6), the supporting mechanism (6) is installed on the frame (1), and is used for supporting the core shaft of the pedal crank structure to be tested.

8. A durability testing apparatus for a bicycle crank drive system as defined in claim 7, wherein The supporting mechanism (6) comprises: Upper support seat (605) and lower support seat (604), the upper support seat (605) and the lower support seat (604) are fixed by bolts, and the gap can be adjusted, and the opposite side of the upper support seat (605) and the lower support seat (604) is provided with a corresponding groove (606); Supporting rod (603), the supporting rod (603) is connected with the lower support seat (604), and is used for supporting the lower support seat (604), and the height of the lower support seat (604) can be adjusted by the supporting rod (603).

9. A durability testing apparatus for a bicycle crank drive system as defined in claim 8, wherein The groove (606) is a triangular structure with opposite openings.

10. A pedal crank drive system endurance testing apparatus according to claim 9, wherein, The supporting mechanism (6) further comprises: Slide rail (601), the slide rail (601) is installed on the frame (1). A sliding block (602) is slidingly installed on the sliding rail (601), and the supporting rod (603) is threadedly connected with the sliding block (602).

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