A frame testing machine

Abstract

The application discloses a kind of frame testing machine, the structure design of the present application is reasonable, (1) in overall layout can utilize head tube strength testing device to test the head tube strength of carbon fiber bicycle frame, utilize disc brake seat strength testing device to test disc brake seat strength, utilize seat tube strength testing device to test seat tube strength, utilize offset testing device to test the left and right offset strength of frame rear triangular frame.(2) the specific structure of offset testing device is set and the cooperation relationship with disc brake seat strength testing device, seat tube strength testing device, so as to ensure that head tube, disc brake seat, seat tube can be tested in the case where strength, specifically realizes the left and right offset strength test of frame rear triangular frame.(3) it is realized to simultaneously realize the head tube of carbon fiber bicycle frame, disc brake seat, seat tube, frame rear triangular frame left and right offset these four strength tests on one equipment, greatly improve work efficiency.

Description

Technical Field

[0001] This invention relates to the field of carbon fiber bicycle frame testing technology, and more particularly to a frame testing machine. Background Technology

[0002] The current market's preference for carbon fiber bicycles is primarily due to their lightweight design compared to ordinary alloy bicycle frames while maintaining the same strength. However, achieving this superior lightweight performance comes with inherent technical risks related to strength; the lighter the weight, the higher the risk to product strength. Preventing these risks requires rigorous testing using relevant equipment to demonstrate the product's safety and reliability, ensuring its overall safety performance.

[0003] The following section will introduce existing carbon fiber bicycle frames; see [link / reference]. Figure 17-19 This includes the head tube (14), disc brake mount (15), seat tube (16), top tube (17), down tube (18), upright fork (19), swingarm fork (20), and mounting holes (21). The specific connection relationships are as follows: Figure 17 As shown, this is just one type of frame in the existing technology; other types of frames are also possible. During testing, to facilitate strength testing, carbon fiber bicycle frames typically have a disc brake (22) mounted on the disc brake mount (15), and a horizontal plate (23) extending rearward on the seatpost (16). A U-shaped groove (24) is provided on the horizontal plate (23), wherein the upper, lower, and side away from the seatpost (16) of the U-shaped groove (24) are open, and fixing holes (25) are provided on both sides of the U-shaped groove (24). See [reference needed]. Figure 18-19 As shown.

[0004] Existing technical solution: In order to solve the problem of testing the strength of the head tube (14), disc brake mount (15), and seat tube (16) of a carbon fiber bicycle frame, the prior art provides a Chinese invention patent application with publication number CN112213115A and patent name "A Carbon Fiber Bicycle Frame Testing Machine". This prior art mainly includes a frame, with a head tube strength testing device at the left end of the frame for testing the strength of the head tube of the frame; a disc brake mount strength testing device at the right end of the frame for testing the strength of the disc brake mount of the frame; and a seat tube strength testing device at the top of the frame for testing the strength of the seat tube of the frame.

[0005] The defects of the prior art are as follows: 1. The prior art can only test the strength of the head tube (14), disc brake mount (15), and seat tube (16) of the carbon fiber bicycle frame, but cannot test the lateral offset strength of the rear triangle of the frame; 2. Regarding the strength test of the seat tube (16), the prior art's seat tube strength test device includes a second hydraulic cylinder, the top of which is mounted on a top bracket, and the bottom of the second hydraulic shaft of the second hydraulic cylinder extends downward; the bottom of the second hydraulic shaft is provided with a third load cell, which is used to test the force applied by the second hydraulic cylinder; the bottom of the third load cell is provided with a pressure block, which is used to apply a vertical force to the seat bone installed on the seat tube of the frame to test the strength of the seat tube of the frame. Because the existing technology uses a second hydraulic cylinder to drive the pressure block to achieve seat tube strength testing, and there is no connection or fixation between the pressure block and the seat bone, there are only two situations: the pressure block is pressed down and the pressure block is disengaged from contact. However, in actual use, the human buttocks are in continuous contact with the seat bone. Therefore, the existing technology cannot truly simulate the actual use scenario, which makes the seat tube strength test inaccurate. Summary of the Invention

[0006] The purpose of this invention is to provide a chassis testing machine to solve the technical problems existing in the prior art.

[0007] To achieve the above objectives, the present invention provides a frame testing machine, including a frame, a working platform on the frame, a head tube strength testing device at the front end of the working platform, and an offset testing device, a disc brake mount strength testing device, and a seat tube strength testing device at the rear end of the working platform.

[0008] The head tube strength testing device includes a first driving device and a first guide rail extending in the front and back. A sliding seat is provided on the first guide rail. The sliding seat can slide back and forth along the first guide rail under the drive of the first driving device. A first rotating shaft extending in the left and right is provided on the sliding seat. The first rotating shaft is hinged to one end of the fixed head tube testing rod.

[0009] The offset testing device includes a first horizontal plate, a second horizontal plate, and a second driving device. The top of the first horizontal plate is provided with a second guide rail extending left and right. The second horizontal plate is disposed on the second guide rail and can slide left and right along the second guide rail under the drive of the second driving device.

[0010] The disc brake mount strength testing device is mounted on a second horizontal plate. The disc brake mount strength testing device includes a third driving device and a vertically extending fixed rod. The top of the fixed rod is provided with a second rotating shaft extending from left to right. The second rotating shaft is hinged to a rotating wheel. The front edge of the rotating wheel is provided with a connecting block. The rotating wheel can rotate around the second rotating shaft under the drive of the third driving device. The two ends of the second rotating shaft pass through the left and right sides of the fixed rod, respectively. The rotating wheel is located on the left or right side of the fixed rod.

[0011] The seatpost strength testing device is mounted on the second horizontal plate and is located in front of the disc brake seat strength testing device. The seatpost strength testing device includes a fourth drive device and a vertically extending rod. The rod can move vertically under the drive of the fourth drive device, and the rod is provided with mounting holes.

[0012] Furthermore, the rear end of the working platform is recessed downward to form a concave platform, on which the offset testing device, disc brake seat strength testing device, and seat tube strength testing device are located. A third guide rail extending forward and backward is provided on the concave platform, positioned between the first horizontal plate and the concave platform, with the first horizontal plate and the third guide rail slidingly engaged. A ball screw extending forward and backward is also provided between the first horizontal plate and the concave platform, with its left and right ends movably connected to fixed seats on the left and right sides, respectively, and the fixed seats fixed to the concave platform. A ball screw cap is provided at the bottom of the first horizontal plate, and the ball screw cap engages with the ball screw in a transmission relationship.

[0013] Furthermore, the second driving device is configured as a second servo electric cylinder, which is located to the right or left of the second guide rail. The second servo electric cylinder has a second driving rod at one end near the second horizontal plate, and a second load cell at one end of the second driving rod near the second horizontal plate. The second load cell is connected to the second horizontal plate.

[0014] Furthermore, the lower edge of the rotating wheel is provided with a downwardly extending swing rod, the third driving device is provided as a third servo electric cylinder, the third servo electric cylinder is located behind the fixed rod, the front end of the third servo electric cylinder is provided with a third driving rod, the front end of the third driving rod is provided with a third load element; the front end of the third load element is provided with a connecting part, the connecting part is provided with a movable groove that is open on the front, upper and lower sides, the movable groove is provided with a third rotating shaft extending in the left and right directions, the bottom end of the swing rod is provided with a shaft hole extending axially in the left and right direction, the shaft hole is movably connected to the third rotating shaft; there is a gap between the shaft hole and the third rotating shaft, and there is a gap between the swing rod and the rear side wall of the movable groove, so that the back and forth movement of the third driving rod can drive the swing rod to swing up and down; the second rotating shaft is provided as a sleeve, and the two ends of the second rotating shaft are respectively threadedly connected to quick-release screws.

[0015] Furthermore, the rotating wheel includes two independent rotating wheels, which are arranged sequentially in the left-right direction. Each independent rotating wheel has a plurality of positioning holes arranged sequentially in the circumferential direction on its edge. The axial direction of the positioning holes extends in the left-right direction. The positioning holes of the two independent rotating wheels are positioned by positioning rods. In the two independent rotating wheels, the front edge of one independent rotating wheel is provided with a connecting block, and the lower edge of the other independent rotating wheel is provided with a downwardly extending swing rod.

[0016] Furthermore, the fourth driving device is configured as a fourth servo electric cylinder, which is located below the vertical rod. The top of the fourth servo electric cylinder is provided with a fourth driving rod, and the top of the fourth driving rod is provided with a fourth load cell. The top of the fourth load cell is connected to the bottom of the vertical rod. The vertical rod is provided with a plurality of mounting holes arranged sequentially in the vertical direction.

[0017] Furthermore, the first driving device is configured as a first servo electric cylinder, which is located in front of the first guide rail. The rear end of the first servo electric cylinder is provided with a first driving rod, and the rear end of the first driving rod is provided with a first load cell. The rear end of the first load cell is connected to the front end of the sliding seat.

[0018] Furthermore, the sliding seat is provided with a rotating support frame, the rotating support frame is provided with a rotating groove, the two ends of the first rotating shaft are respectively movably connected to the left and right side walls of the rotating groove, the end of the fixed head tube test rod that is hinged to the first rotating shaft is located in the rotating groove, and the end of the fixed head tube test rod away from the first rotating shaft is threadedly connected to the fixed head tube screw.

[0019] Furthermore, the working platform is provided with a five-way fixed bracket in the middle, and the top of the five-way fixed bracket is provided with two fixed plates arranged sequentially in the left-right direction. The inner side wall of the fixed plate is provided with a sliding groove with an opening on the upper side, and the outer side wall of the fixed plate is provided with a groove extending vertically, the groove extending inward to the sliding groove. The sliding grooves of the two fixed plates are respectively slidably engaged with the left and right ends of the upper and lower sliding screws. The left and right ends of the upper and lower sliding screws are respectively provided with fixed five-way nuts, the fixed five-way nuts being located between the two fixed plates. The outer sides of the two fixed plates are respectively provided with screws, the screws on both sides passing through the grooves and locking with the left and right ends of the upper and lower sliding screws respectively.

[0020] Furthermore, a top support is provided above the working platform, and a pressing device is provided on the top support. The pressing device is located above the seat tube strength testing device. The pressing device includes a cylinder, and a piston rod is provided at the bottom end of the cylinder. An anti-collision block is provided at the bottom end of the piston rod.

[0021] In summary, the technical solution of the present invention has the following beneficial effects: The structure of the present invention is reasonable. 1. (1) The front end of the working platform is provided with a head tube strength testing device, and the rear end of the working platform is provided with an offset testing device, a disc brake seat strength testing device, and a seat tube strength testing device; thus, in terms of overall layout, the head tube strength testing device can be used to test the head tube strength of the carbon fiber bicycle frame, the disc brake seat strength testing device can be used to test the disc brake seat strength, the seat tube strength testing device can be used to test the seat tube strength, and the offset testing device can be used to test the left and right offset strength of the rear triangle of the frame. (2) The offset testing device includes a first horizontal plate, a second horizontal plate, and a second driving device. The top of the first horizontal plate is provided with a second guide rail extending left and right. The second horizontal plate is located on the second guide rail and can slide left and right along the second guide rail under the drive of the second driving device. The disc brake seat strength testing device is located on the second horizontal plate. The seat tube strength testing device is located on the second horizontal plate. Thus, the specific structure of the offset testing device and its cooperation with the disc brake seat strength testing device and the seat tube strength testing device are set, thereby ensuring that the head tube, disc brake seat, and seat tube can be tested for strength, and specifically realizing the left and right offset strength test of the rear triangle of the frame. (3) As can be seen from the above analysis, the present invention, through the overall position layout and specific structural design of the offset testing device, realizes the simultaneous realization of four strength tests on the head tube, disc brake seat, seat tube, and left and right offset of the rear triangle of the carbon fiber bicycle frame on one device, which greatly improves the work efficiency.

[0022] 2. A seatpost strength testing device is installed in front of the disc brake seat strength testing device. The seatpost strength testing device includes a fourth drive device and a vertically extending vertical rod. The vertical rod can move vertically under the drive of the fourth drive device. The vertical rod is provided with mounting holes. The vertical rod can be installed in the U-shaped groove of the horizontal plate on the seatpost. The mounting holes of the vertical rod are connected and fixed to the fixing holes on both sides of the U-shaped groove by pins. Under the drive of the fourth drive device, the vertical rod continuously drives the horizontal plate to swing up and down, thereby simulating the actual use scenario and realizing the accurate testing of the seatpost strength. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0024] Figure 2 This is a three-dimensional structural diagram of the frame of the present invention;

[0025] Figure 3 This is a three-dimensional structural schematic diagram of the invention from the first perspective when the frame is removed;

[0026] Figure 4This is a three-dimensional structural schematic diagram of the head tube strength testing device of the present invention from a first perspective;

[0027] Figure 5 This is a three-dimensional structural schematic diagram of the head tube strength testing device of the present invention from a second perspective;

[0028] Figure 6 This is a three-dimensional structural schematic diagram of the five-way fixing bracket of the present invention from a first perspective;

[0029] Figure 7 This is a three-dimensional structural schematic diagram of the five-way fixing bracket of the present invention from a second perspective;

[0030] Figure 8 This is a three-dimensional structural diagram of the pressing device of the present invention;

[0031] Figure 9 This is a three-dimensional structural diagram of the first perspective when the offset testing device of the present invention is assembled with the disc brake seat strength testing device and the seat tube strength testing device.

[0032] Figure 10 This is a three-dimensional structural diagram from a second perspective when the offset testing device of the present invention is assembled with the disc brake seat strength testing device and the seat tube strength testing device.

[0033] Figure 11 This is a three-dimensional structural diagram of the offset testing device of the present invention when assembled with the disc brake seat strength testing device and the seat tube strength testing device.

[0034] Figure 12 This is a three-dimensional structural diagram from a fourth perspective when the offset testing device of the present invention is assembled with the disc brake seat strength testing device and the seat tube strength testing device.

[0035] Figure 13 This is a three-dimensional structural diagram of the invention from a second perspective when the frame is removed;

[0036] Figure 14 This is a three-dimensional structural diagram of the connecting part of the present invention;

[0037] Figure 15 This is a three-dimensional structural schematic diagram of the swing arm of the present invention;

[0038] Figure 16 This is a three-dimensional structural diagram of the connecting block of the present invention;

[0039] Figure 17 This is a three-dimensional structural diagram of an existing carbon fiber bicycle frame;

[0040] Figure 18 This is a 3D structural diagram of an existing carbon fiber bicycle frame with disc brakes installed.

[0041] Figure 19 yes Figure 18 A magnified view of a portion of the image;

[0042] Explanation of reference numerals in the attached drawings: 1-Frame, 2-Working platform, 3-Recessed platform, 301-Third guide rail, 302-Ball screw, 303-Fixed seat, 4-Head tube strength testing device, 401-First drive device, 4011-First drive rod, 4012-First load cell, 402-First guide rail, 403-Sliding seat, 404-First rotating shaft, 405-Fixed head tube testing rod, 406-Rotating support frame, 4061-Rotating groove, 407-Fixed head tube screw, 5-Offset testing device, 501-First horizontal plate, 5011-Second guide rail, 5012-Ball screw cap, 502-Second horizontal plate, 503-Second drive device, 5031-Second drive rod, 5032-Second load cell, 6-Disc brake seat strength testing device, 601-Third drive device, 601 1-Third drive rod, 6012-Third load cell, 6013-Connecting part, 6014-Modible groove, 6015-Third rotating shaft, 602-Fixed rod, 603-Second rotating shaft, 604-Rotating wheel, 6041-Independent rotating wheel, 6042-Positioning hole, 605-Connecting block, 606-Swing rod, 6061-Shaft hole, 7-Seat tube strength testing device, 701-Fourth drive device, 7011-Fourth drive rod, 7012-Fourth load cell, 702-Vertical rod, 7021-Mounting hole, 8-Five-way fixed bracket, 801-Fixed plate, 802-Sliding groove, 803-Groove, 804-Up and down sliding screw, 805-Fixed five-way nut, 9-Top bracket, 10-Pressing device, 1001-Cylinder, 1002-Piston rod, 1003-Anti-collision block.

[0043] 11-Handle, 12-Fourth guide rail, 13-Slider; 14-Head tube, 15-Disc brake mount, 16-Seat tube, 17-Top tube, 18-Bottom tube, 19-Upright fork, 20-Straight fork, 21-Mounting hole, 22-Disc brake, 23-Horizontal plate, 24-U-groove, 25-Fixing hole. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention, but this does not constitute a limitation on the scope of protection of the present invention.

[0045] In this invention, for clarity, the following description is provided: The observer faces the attached... Figure 1In this observation, the left side of the observer is designated as front, the right side as rear, the front of the observer as right, the rear of the observer as left, the top of the observer as up, and the bottom of the observer as down. It should be noted that the terms "front end," "rear end," "left side," "right side," "middle," "above," and "below" used in this document indicate orientations or positional relationships based on the accompanying drawings. These are merely for the purpose of clearly describing the invention and do not indicate or imply that the structures or components referred to must have a specific orientation or be constructed in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," "third," and "fourth" are used only for the purpose of clarity or simplification of description and should not be construed as indicating or implying relative importance or quantity.

[0046] See Figure 1-19 This embodiment provides a frame testing machine, including a frame 1, a working platform 2 on the frame 1, a head tube strength testing device 4 at the front end of the working platform 2, and an offset testing device 5, a disc brake seat strength testing device 6, and a seat tube strength testing device 7 at the rear end of the working platform 2.

[0047] The head tube strength testing device 4 includes a first driving device 401 and a first guide rail 402 extending forward and backward. A sliding seat 403 is provided on the first guide rail 402. The sliding seat 403 can slide forward and backward along the first guide rail 402 under the drive of the first driving device 401. A first rotating shaft 404 extending left and right is provided on the sliding seat 403. The first rotating shaft 404 is hinged to one end of the fixed head tube test rod 405. In actual application: First, the fixed head tube test rod is inserted into the head tube of the frame and fixed. The specific fixing method can be selected according to the actual situation. Then, the sliding seat slides forward and backward along the first guide rail under the drive of the first driving device. The force generated by the sliding seat will be transmitted to the head tube through the fixed head tube test rod, thereby realizing the work of testing the head tube strength.

[0048] The offset testing device 5 includes a first horizontal plate 501, a second horizontal plate 502, and a second driving device 503. The top of the first horizontal plate 501 is provided with a second guide rail 5011 extending left and right. The second horizontal plate 502 is disposed on the second guide rail 5011. The second horizontal plate 502 can slide left and right along the second guide rail 5011 under the drive of the second driving device 503. In actual application: under the drive of the second driving device, the second horizontal plate slides left and right along the second guide rail.

[0049] The disc brake mount strength testing device 6 is mounted on the second horizontal plate 502. The disc brake mount strength testing device 6 includes a third drive device 601 and a vertically extending fixed rod 602. The top of the fixed rod 602 is provided with a second rotating shaft 603 extending left and right. The second rotating shaft 603 is hinged to a rotating wheel 604. The front edge of the rotating wheel 604 is provided with a connecting block 605. The rotating wheel 604 can rotate around the second rotating shaft 603 under the drive of the third drive device 601. The two ends of the second rotating shaft 603 pass through the left and right sides of the fixed rod 602 respectively. The rotating wheel 604 is located on the left or right side of the fixed rod 602. In actual application: the connecting block is connected and fixed to the disc brake mounted on the disc brake mount of the frame. Under the drive of the third drive device, the rotating wheel rotates around the second rotating shaft, thereby driving the movement of the connecting block, and finally realizing the strength test of the disc brake mount of the frame. Furthermore, the two ends of the second rotating shaft are installed and fixedly engaged with the mounting holes 21 at the rear end connection of the upright fork 19 and the horizontal fork 20 of the frame, so as to fix and support the rear end of the frame. Since the disc brake mount strength testing device 6 is located on the second horizontal plate 502, the left and right sliding of the second horizontal plate will drive the disc brake mount strength testing device to slide left and right, thereby realizing the left and right swing strength test of the rear triangle of the frame.

[0050] The seatpost strength testing device 7 is mounted on the second horizontal plate 502, in front of the disc brake mount strength testing device 6. The seatpost strength testing device 7 includes a fourth drive device 701 and a vertically extending vertical rod 702. The vertical rod 702 can move vertically under the drive of the fourth drive device 701, and has mounting holes 7021. In actual use: the vertical rod is installed in the U-shaped groove of the horizontal plate on the seatpost, and the mounting hole of the vertical rod is connected and fixed to the fixing holes on both sides of the U-shaped groove by pins. Driven by the fourth drive device, the vertical rod continuously drives the horizontal plate to swing up and down, simulating actual use scenarios and achieving accurate testing of the seatpost strength. Because the seatpost strength testing device 7 is mounted on the second horizontal plate 502, the relative positions of the seatpost strength testing device 7 and the disc brake mount strength testing device 6 can remain fixed.

[0051] In summary, the effects of the above technical solutions are as follows: 1. (1) The front end of the working platform is equipped with a head tube strength testing device, and the rear end of the working platform is equipped with an offset testing device, a disc brake seat strength testing device, and a seat tube strength testing device; thus, in terms of overall layout, the head tube strength testing device can be used to test the head tube strength of the carbon fiber bicycle frame, the disc brake seat strength testing device can be used to test the disc brake seat strength, the seat tube strength testing device can be used to test the seat tube strength, and the offset testing device can be used to test the left and right offset strength of the rear triangle of the frame. (2) The offset testing device includes a first horizontal plate, a second horizontal plate, and a second driving device. The top of the first horizontal plate is provided with a second guide rail extending left and right. The second horizontal plate is located on the second guide rail and can slide left and right along the second guide rail under the drive of the second driving device. The disc brake seat strength testing device is located on the second horizontal plate. The seat tube strength testing device is located on the second horizontal plate. Thus, the specific structure of the offset testing device and its cooperation with the disc brake seat strength testing device and the seat tube strength testing device are set, thereby ensuring that the head tube, disc brake seat, and seat tube can be tested for strength, and specifically realizing the left and right offset strength test of the rear triangle of the frame. (3) As can be seen from the above analysis, the present invention, through the overall position layout and specific structural design of the offset testing device, realizes the simultaneous realization of four strength tests on the head tube, disc brake seat, seat tube, and left and right offset of the rear triangle of the carbon fiber bicycle frame on one device, which greatly improves the work efficiency.

[0052] 2. A seatpost strength testing device is installed in front of the disc brake seat strength testing device. The seatpost strength testing device includes a fourth drive device and a vertically extending vertical rod. The vertical rod can move vertically under the drive of the fourth drive device. The vertical rod is provided with mounting holes. The vertical rod can be installed in the U-shaped groove of the horizontal plate on the seatpost. The mounting holes of the vertical rod are connected and fixed to the fixing holes on both sides of the U-shaped groove by pins. Under the drive of the fourth drive device, the vertical rod continuously drives the horizontal plate to swing up and down, thereby simulating the actual use scenario and realizing the accurate testing of the seatpost strength.

[0053] Part One, which will be introduced in detail below, describes the concave platform:

[0054] Specifically, the rear end of the working platform 2 is recessed downward to form a concave platform 3. The offset testing device 5, the disc brake seat strength testing device 6, and the seat tube strength testing device 7 are installed on the concave platform 3. A third guide rail 301 extending along the front and rear is provided on the concave platform 3. The third guide rail 301 is located between the first horizontal plate 501 and the concave platform 3, and the first horizontal plate 501 and the third guide rail 301 slide in a front-to-back manner. A ball screw 302 extending along the front and rear is also provided between the first horizontal plate 501 and the concave platform 3. The left and right ends of the ball screw 302 are movably connected to the left and right fixed seats 303 on the left and right sides, respectively. The fixed seats 303 are fixed on the concave platform 3. A ball screw cap 5012 is provided at the bottom of the first horizontal plate 501, and the ball screw cap 5012 is in a transmission engagement with the ball screw 302. Functions: (1) The purpose of setting up the concave platform is to provide sufficient space for the installation of the offset testing device, disc brake seat strength testing device, and seat post strength testing device, so as to avoid the frame from being in a serious front-low-rear-high state during the test, thereby simulating the actual running state of the frame and making the test results more reliable. (2) The function of the ball screw and ball screw cap is to manually drive the ball screw to rotate, thereby driving the ball screw cap to move back and forth, and then driving the first horizontal plate to move back and forth along the third guide rail, so as to realize the adjustment function.

[0055] The second part, which follows, will describe the offset testing device in detail:

[0056] Specifically, the second drive device 503 is configured as a second servo electric cylinder, located to the right or left of the second guide rail 5011. A second drive rod 5031 is located at one end of the second servo electric cylinder near the second horizontal plate 502, and a second load cell 5032 is located at the other end of the second drive rod 5031 near the second horizontal plate 502. The second load cell 5032 is connected to the second horizontal plate 502. Function: Through the driving action of the second servo electric cylinder, the second horizontal plate is moved left and right, thereby performing a left-right swing test on the rear triangle of the frame. The second servo electric cylinder is chosen as the power source because of its high motion accuracy and continuous movement, thus improving testing efficiency.

[0057] Part Three, which follows, will introduce the disc brake mount strength testing device in detail:

[0058] Specifically, the lower edge of the rotating wheel 604 is provided with a downwardly extending swing rod 606. The third drive device 601 is a third servo electric cylinder, which is located behind the fixed rod 602. The front end of the third servo electric cylinder is provided with a third drive rod 6011, and the front end of the third drive rod 6011 is provided with a third load cell 6012. The front end of the third load cell 6012 is provided with a connecting part 6013, and the connecting part 6013 is provided with a movable groove 6014 that is open on the front, upper, and lower sides. The movable groove 6014 is provided with a lateral sway bar. The extended third rotating shaft 6015 has a shaft hole 6061 extending axially in the left-right direction at the bottom end of the swing rod 606, which is movably connected to the third rotating shaft 6015. There is a gap between the shaft hole 6061 and the third rotating shaft 6015, and a gap between the swing rod 606 and the rear side wall of the movable groove 6014, so that the forward and backward movement of the third drive rod 6011 can drive the swing rod 606 to swing up and down. The second rotating shaft 603 is a sleeve, and both ends of the second rotating shaft 603 are threadedly connected to quick-release screws. Function: The connecting block 605 is used to connect and fix the disc brake 21 mounted on the disc brake mount 15 of the frame, so that under the drive of the third servo electric cylinder, the swing rod 606 is forced to swing up and down, thereby realizing the strength test of the disc brake mount 15 of the frame. The reason for choosing the third servo electric cylinder as the power source is its high motion accuracy and continuous movement, thereby improving the efficiency of the testing work. When the second rotating shaft is set as a sleeve, a quick-release screw can be used to engage with the second rotating shaft to lock the rear triangle of the frame. Since the disc brake mount strength test requires a smaller range of motion, the swing arm also requires a smaller swing range.

[0059] Specifically, the rotating wheel 604 includes two independent rotating wheels 6041, which are arranged sequentially in the left-right direction. Each independent rotating wheel 6041 has several positioning holes 6042 arranged sequentially in the circumferential direction on its edge. The axial direction of the positioning holes 6042 extends in the left-right direction. The positioning holes 6042 of the two independent rotating wheels 6041 are positioned together by positioning rods. One of the independent rotating wheels 6041 has a connecting block 605 on its front edge, and the other independent rotating wheel 6041 has a downwardly extending swing rod 606 on its lower edge. Function: By setting two independent rotating wheels, the positional relationship between the positioning holes of the two independent rotating wheels can be adjusted to achieve different included angles between the swing rod and the connecting block, facilitating adjustment.

[0060] Part Four, the following section will introduce the seat tube strength testing device in detail:

[0061] Specifically, the fourth drive device 701 is a fourth servo electric cylinder, located below the vertical rod 702. A fourth drive rod 7011 is located at the top of the fourth servo electric cylinder, and a fourth load cell 7012 is located at the top of the fourth drive rod 7011. The top of the fourth load cell 7012 is connected to the bottom of the vertical rod 702. The vertical rod 702 has several mounting holes 7021 arranged vertically in sequence. Function: Driven by the fourth servo electric cylinder, the vertical rod continuously drives the horizontal plate to swing up and down, thereby simulating actual usage scenarios and achieving accurate testing of the seat tube strength. Because the vertical rod 702 has several mounting holes 7021 arranged vertically in sequence, different mounting holes can be matched with fixing holes to adapt to frames of different sizes, improving adaptability. The fourth servo electric cylinder is chosen as the power source because of its high motion precision and continuous motion capability, thereby improving testing efficiency.

[0062] Part Five, the following section will introduce the head tube strength testing device in detail:

[0063] Specifically, the first driving device 401 is a first servo electric cylinder, located in front of the first guide rail 402. A first driving rod 4011 is located at the rear end of the first servo electric cylinder, and a first load cell 4012 is located at the rear end of the first driving rod 4011. The rear end of the first load cell 4012 is connected to the front end of the sliding seat 403. Preferably, the rear end of the first load cell 4012 is detachably connected to the front end of the sliding seat 403. In actual testing: when the sliding seat is subjected to the forward and backward pulling force of the first servo electric cylinder, the pulling force on the sliding seat will be transmitted sequentially to the head tube through the rotating support frame and the fixed head tube test rod, thereby achieving the work of testing the strength of the head tube during movement. The reason for choosing the first servo electric cylinder as the power source is its high motion accuracy and continuous movement, thereby improving the efficiency of the testing work.

[0064] Specifically, the sliding seat 403 is provided with a rotating support frame 406, and the rotating support frame 406 is provided with a rotating groove 4061. The two ends of the first rotating shaft 404 are respectively movably connected to the left and right side walls of the rotating groove 4061. One end of the fixed head tube test rod 405, which is hinged to the first rotating shaft 404, is located in the rotating groove 4061. The end of the fixed head tube test rod 405 away from the first rotating shaft 404 is threadedly connected to the fixed head tube screw 407. Function: By inserting the fixed head tube test rod upward into the head tube of the frame, and then locking the fixed head tube screw downward with the fixed head tube test rod, the fixed head tube test rod is fixed and supported to the head tube of the frame. Preferably, the fixed head tube screw 407 is provided with a handle 11.

[0065] Part Six, the following section will introduce the bottom bracket fixing mechanism in detail:

[0066] Specifically, the working platform 2 is provided with a five-way fixed bracket 8 in the middle. The top of the five-way fixed bracket 8 is provided with two fixed plates 801 arranged in a left-right direction. The inner side wall of the fixed plate 801 is provided with a sliding groove 802 with an opening on the upper side. The outer side wall of the fixed plate 801 is provided with a slot 803 extending vertically. The slot 803 extends inward to the sliding groove 802. The sliding grooves 802 of the two fixed plates 801 are respectively slidably engaged with the left and right ends of the upper and lower sliding screws 804. The left and right ends of the upper and lower sliding screws 804 are respectively provided with fixed five-way nuts 805, which are located between the two fixed plates 801. The outer side of the two fixed plates 801 is provided with screws. The screws on both sides pass through the slots 803 and are locked with the left and right ends of the upper and lower sliding screws 804 respectively. Function: First, the sliding screw 804 passes through the bottom bracket of the frame. Then, the sliding screw 804 is pressed downwards into the sliding groove. Next, the bottom bracket nut 805 is used to fix both sides of the bottom bracket. Finally, the screws on both sides are used to fix the sliding screw inwards. It should be noted that the bottom bracket fixing bracket is only needed to lock the bottom bracket of the frame when only the rear fork bracket (i.e., the rear triangle bracket) needs to be tested. In other cases, the bottom bracket bracket is not needed for fixation. That is to say, this invention can not only test four items simultaneously, but also test one item at a time. When testing one item at a time, only the other parts that do not need to be tested need to be fixed, leaving only the item being tested free to move.

[0067] Part VII, the following section will describe the pressing device in detail:

[0068] Specifically, a top support 9 is provided above the working platform 2, and a pressing device 10 is provided on the top support 9. The pressing device 10 is located above the seat tube strength testing device 7. The pressing device 10 includes a cylinder 1001, a piston rod 1002 is provided at the bottom end of the cylinder 1001, and an anti-collision block 1003 is provided at the bottom end of the piston rod 1002. Function: Driven by the cylinder 1001, the anti-collision block presses downward against the horizontal plate of the seat tube, thereby limiting the horizontal plate and thus cooperating with the seat tube strength testing device 7.

[0069] Preferably, the bottom of the top support 9 is provided with a fourth guide rail 12 extending in the front-to-back direction, and the top of the cylinder 1001 is provided with a slider 13. The slider 13 slides in the front-to-back direction with the fourth guide rail 12, thereby facilitating the adjustment of the position of the pressing device 10. It should be noted that the load cell mentioned above serves to measure the magnitude of the applied force, thereby improving the degree of automation. In order to better achieve linkage, an operating system can be used to control the coordination of each servo electric cylinder and the cylinder.

[0070] In summary, the technical effects of this invention are as follows:

[0071] (1) The first servo cylinder is responsible for testing the head tube strength, the second servo cylinder is responsible for testing the left and right offset strength of the rear triangle of the frame, the third servo cylinder is responsible for testing the disc brake mount strength, and the fourth servo cylinder is responsible for testing the seat tube strength. Therefore, four strengths can be tested at the same time, which improves work efficiency. It can also be used to test a single strength, thus achieving flexibility.

[0072] (2) Since the servo electric cylinder is used as the power source for testing, the testing accuracy is improved and continuous testing is achieved, thus improving efficiency.

[0073] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A chassis testing machine, comprising a frame (1), characterized in that: The frame (1) is provided with a working platform (2), the front end of the working platform (2) is provided with a head tube strength testing device (4), and the rear end of the working platform (2) is provided with an offset testing device (5), a disc brake seat strength testing device (6), and a seat tube strength testing device (7). The head tube strength testing device (4) includes a first driving device (401) and a first guide rail (402) extending in the front and back. A sliding seat (403) is provided on the first guide rail (402). The sliding seat (403) can slide back and forth along the first guide rail (402) under the drive of the first driving device (401). A first rotating shaft (404) extending in the left and right is provided on the sliding seat (403). The first rotating shaft (404) is hinged to one end of the fixed head tube testing rod (405). The offset testing device (5) includes a first horizontal plate (501), a second horizontal plate (502), and a second driving device (503). The top of the first horizontal plate (501) is provided with a second guide rail (5011) extending left and right. The second horizontal plate (502) is disposed on the second guide rail (5011). The second horizontal plate (502) can slide left and right along the second guide rail (5011) under the drive of the second driving device (503). The disc brake mount strength testing device (6) is mounted on the second horizontal plate (502). The disc brake mount strength testing device (6) includes a third driving device (601) and a vertically extending fixed rod (602). The top of the fixed rod (602) is provided with a second rotating shaft (603) extending to the left and right. The second rotating shaft (603) is hinged to a rotating wheel (604). The front edge of the rotating wheel (604) is provided with a connecting block (605). The rotating wheel (604) can rotate around the second rotating shaft (603) under the drive of the third driving device (601). The two ends of the second rotating shaft (603) pass through the left and right sides of the fixed rod (602) respectively. The rotating wheel (604) is located on the left or right side of the fixed rod (602). The seatpost strength testing device (7) is mounted on the second horizontal plate (502) and is located in front of the disc brake seat strength testing device (6). The seatpost strength testing device (7) includes a fourth drive device (701) and a vertically extending rod (702). The rod (702) can move vertically under the drive of the fourth drive device (701). The rod (702) is provided with mounting holes (7021).

2. The chassis testing machine according to claim 1, characterized in that: The rear end of the working platform (2) is recessed downward to form a recessed platform (3). The offset testing device (5), disc brake seat strength testing device (6), and seat tube strength testing device (7) are located on the recessed platform (3). A third guide rail (301) extending along the front and rear is provided on the recessed platform (3). The third guide rail (301) is located between the first horizontal plate (501) and the recessed platform (3). The first horizontal plate (501) and the third guide rail (301) slide back and forth. The first horizontal plate (501) and the concave platform (3) are provided with a ball screw (302) extending along the front and back. The left and right ends of the ball screw (302) are respectively movably connected to the fixed seats (303) on the left and right sides. The fixed seats (303) are fixed on the concave platform (3). The bottom of the first horizontal plate (501) is provided with a ball screw cap (5012), and the ball screw cap (5012) is in transmission cooperation with the ball screw (302).

3. The chassis testing machine according to claim 1, characterized in that: The second drive device (503) is configured as a second servo electric cylinder. The second servo electric cylinder is located to the right or left of the second guide rail (5011). The second servo electric cylinder is provided with a second drive rod (5031) at one end near the second horizontal plate (502). The second drive rod (5031) is provided with a second load cell (5032) at one end near the second horizontal plate (502). The second load cell (5032) is connected to the second horizontal plate (502).

4. The chassis testing machine according to claim 1, characterized in that: The lower edge of the rotating wheel (604) is provided with a downwardly extending swing rod (606). The third driving device (601) is a third servo electric cylinder, which is located behind the fixed rod (602). The front end of the third servo electric cylinder is provided with a third driving rod (6011), and the front end of the third driving rod (6011) is provided with a third load cell (6012). The front end of the third load cell (6012) is provided with a connecting part (6013), and the connecting part (6013) is provided with a movable groove (6014) that is open on the front, upper, and lower sides. The movable groove (6014) is provided with a lateral extending... The third rotating shaft (6015) has a shaft hole (6061) extending axially in the left and right direction at the bottom end of the swing rod (606), and the shaft hole (6061) is movably connected to the third rotating shaft (6015); there is a gap between the shaft hole (6061) and the third rotating shaft (6015), and there is a gap between the swing rod (606) and the rear side wall of the movable groove (6014), so that the back and forth movement of the third drive rod (6011) can drive the swing rod (606) to swing up and down; the second rotating shaft (603) is a sleeve, and the two ends of the second rotating shaft (603) are respectively threadedly connected to the quick-release screw.

5. The chassis testing machine according to claim 4, characterized in that: The rotating wheel (604) includes two independent rotating wheels (6041), which are arranged sequentially in the left-right direction. Each independent rotating wheel (6041) has a plurality of positioning holes (6042) arranged sequentially in the circumferential direction on its edge. The positioning holes (6042) extend axially in the left-right direction. The positioning holes (6042) of the two independent rotating wheels (6041) are positioned by positioning rods. One of the independent rotating wheels (6041) has a connecting block (605) on its front edge, and the other independent rotating wheel (6041) has a downwardly extending swing rod (606) on its lower edge.

6. The chassis testing machine according to claim 1, characterized in that: The fourth driving device (701) is configured as a fourth servo electric cylinder, which is located below the vertical rod (702). The top of the fourth servo electric cylinder is provided with a fourth driving rod (7011), and the top of the fourth driving rod (7011) is provided with a fourth load cell (7012). The top of the fourth load cell (7012) is connected to the bottom of the vertical rod (702). The vertical rod (702) is provided with a plurality of mounting holes (7021) arranged vertically in sequence.

7. The chassis testing machine according to claim 1, characterized in that: The first driving device (401) is configured as a first servo electric cylinder, which is located in front of the first guide rail (402). The rear end of the first servo electric cylinder is provided with a first driving rod (4011), and the rear end of the first driving rod (4011) is provided with a first load cell (4012). The rear end of the first load cell (4012) is connected to the front end of the sliding seat (403).

8. The chassis testing machine according to claim 1, characterized in that: The sliding seat (403) is provided with a rotating support frame (406), and the rotating support frame (406) is provided with a rotating groove (4061). The two ends of the first rotating shaft (404) are respectively movably connected to the left and right side walls of the rotating groove (4061). The end of the fixed head tube test rod (405) that is hinged to the first rotating shaft (404) is located in the rotating groove (4061). The end of the fixed head tube test rod (405) away from the first rotating shaft (404) is threadedly connected to the fixed head tube screw (407).

9. A chassis testing machine according to any one of claims 1 to 8, characterized in that: The working platform (2) is provided with a five-way fixed bracket (8) in the middle. The top of the five-way fixed bracket (8) is provided with two fixed plates (801) arranged in sequence along the left and right directions. The inner side wall of the fixed plate (801) is provided with a sliding groove (802) with an opening on the upper side. The outer side wall of the fixed plate (801) is provided with a slot (803) extending vertically. The slot (803) extends inward to the sliding groove (802). The sliding grooves (802) of the two fixed plates (801) are respectively slidably engaged with the left and right ends of the upper and lower sliding screws (804). The left and right ends of the upper and lower sliding screws (804) are respectively provided with fixed five-way nuts (805). The fixed five-way nuts (805) are located between the two fixed plates (801). The outer side of the two fixed plates (801) is provided with screws. The screws on both sides pass through the slots (803) and are locked with the left and right ends of the upper and lower sliding screws (804).

10. A chassis testing machine according to any one of claims 1 to 8, characterized in that: The working platform (2) is provided with a top support (9) above it, and a pressing device (10) is provided on the top support (9). The pressing device (10) is located above the seat tube strength testing device (7). The pressing device (10) includes a cylinder (1001), and a piston rod (1002) is provided at the bottom end of the cylinder (1001). A collision block (1003) is provided at the bottom end of the piston rod (1002).

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